diff options
Diffstat (limited to 'mesalib/src/mesa/swrast')
55 files changed, 22680 insertions, 22796 deletions
diff --git a/mesalib/src/mesa/swrast/NOTES b/mesalib/src/mesa/swrast/NOTES new file mode 100644 index 000000000..d6f991ee8 --- /dev/null +++ b/mesalib/src/mesa/swrast/NOTES @@ -0,0 +1,55 @@ +INTRODUCTION
+
+Mesa's native software rasterizer. This module provides the fallback
+paths for rasterization operations and states that aren't accelerated
+in hardware drivers, and as the full rasterization engine in software
+drivers.
+
+The swrast module 'stands alone', relying only on interfaces to core
+mesa and it's own driver interface. It knows nothing about the tnl or
+other modules, allowing it to be used for fallback paths in future tnl
+schemes without modification.
+
+As well as providing triangle/line/point rasterization functionality,
+the module provides implementations of the pixel operations
+(ReadPixels, etc), and texture operations (CopyTexSubImage) which may
+be plugged in to the core Mesa driver interface where accelerated
+versions of these operations are unavailable.
+
+
+STATE
+
+To create and destroy the module:
+
+ GLboolean _swrast_CreateContext( struct gl_context *ctx );
+ void _swrast_DestroyContext( struct gl_context *ctx );
+
+This module tracks state changes internally and maintains derived
+values based on the current state. For this to work, the driver
+ensure the following funciton is called whenever the state changes and
+the swsetup module is 'awake':
+
+ void _swrast_InvalidateState( struct gl_context *ctx, GLuint new_state );
+
+There is no explicit call to put the swrast module to sleep.
+
+
+CUSTOMIZATION
+
+ void (*choose_point)( struct gl_context * );
+ void (*choose_line)( struct gl_context * );
+ void (*choose_triangle)( struct gl_context * );
+
+Drivers may add additional triangle/line/point functions to swrast by
+overriding these functions. It is necessary for the driver to be very
+careful that it doesn't return an inappropriate function, eg a
+rasterization function in feedback mode. See the X11 driver for
+examples.
+
+DRIVER INTERFACE
+
+The swrast device driver provides swrast primarily with span- and
+pixel- level interfaces to a framebuffer, with a few additional hooks
+for locking and setting the read buffer.
+
+See the definition of struct swrast_device_driver in swrast.h.
\ No newline at end of file diff --git a/mesalib/src/mesa/swrast/s_aaline.c b/mesalib/src/mesa/swrast/s_aaline.c index 6ba4604e6..be817f326 100644 --- a/mesalib/src/mesa/swrast/s_aaline.c +++ b/mesalib/src/mesa/swrast/s_aaline.c @@ -1,492 +1,492 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/imports.h" -#include "main/macros.h" -#include "main/mtypes.h" -#include "swrast/s_aaline.h" -#include "swrast/s_context.h" -#include "swrast/s_span.h" -#include "swrast/swrast.h" - - -#define SUB_PIXEL 4 - - -/* - * Info about the AA line we're rendering - */ -struct LineInfo -{ - GLfloat x0, y0; /* start */ - GLfloat x1, y1; /* end */ - GLfloat dx, dy; /* direction vector */ - GLfloat len; /* length */ - GLfloat halfWidth; /* half of line width */ - GLfloat xAdj, yAdj; /* X and Y adjustment for quad corners around line */ - /* for coverage computation */ - GLfloat qx0, qy0; /* quad vertices */ - GLfloat qx1, qy1; - GLfloat qx2, qy2; - GLfloat qx3, qy3; - GLfloat ex0, ey0; /* quad edge vectors */ - GLfloat ex1, ey1; - GLfloat ex2, ey2; - GLfloat ex3, ey3; - - /* DO_Z */ - GLfloat zPlane[4]; - /* DO_RGBA - always enabled */ - GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4]; - /* DO_ATTRIBS */ - GLfloat wPlane[4]; - GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4]; - GLfloat lambda[FRAG_ATTRIB_MAX]; - GLfloat texWidth[FRAG_ATTRIB_MAX]; - GLfloat texHeight[FRAG_ATTRIB_MAX]; - - SWspan span; -}; - - - -/* - * Compute the equation of a plane used to interpolate line fragment data - * such as color, Z, texture coords, etc. - * Input: (x0, y0) and (x1,y1) are the endpoints of the line. - * z0, and z1 are the end point values to interpolate. - * Output: plane - the plane equation. - * - * Note: we don't really have enough parameters to specify a plane. - * We take the endpoints of the line and compute a plane such that - * the cross product of the line vector and the plane normal is - * parallel to the projection plane. - */ -static void -compute_plane(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1, - GLfloat z0, GLfloat z1, GLfloat plane[4]) -{ -#if 0 - /* original */ - const GLfloat px = x1 - x0; - const GLfloat py = y1 - y0; - const GLfloat pz = z1 - z0; - const GLfloat qx = -py; - const GLfloat qy = px; - const GLfloat qz = 0; - const GLfloat a = py * qz - pz * qy; - const GLfloat b = pz * qx - px * qz; - const GLfloat c = px * qy - py * qx; - const GLfloat d = -(a * x0 + b * y0 + c * z0); - plane[0] = a; - plane[1] = b; - plane[2] = c; - plane[3] = d; -#else - /* simplified */ - const GLfloat px = x1 - x0; - const GLfloat py = y1 - y0; - const GLfloat pz = z0 - z1; - const GLfloat a = pz * px; - const GLfloat b = pz * py; - const GLfloat c = px * px + py * py; - const GLfloat d = -(a * x0 + b * y0 + c * z0); - if (a == 0.0 && b == 0.0 && c == 0.0 && d == 0.0) { - plane[0] = 0.0; - plane[1] = 0.0; - plane[2] = 1.0; - plane[3] = 0.0; - } - else { - plane[0] = a; - plane[1] = b; - plane[2] = c; - plane[3] = d; - } -#endif -} - - -static INLINE void -constant_plane(GLfloat value, GLfloat plane[4]) -{ - plane[0] = 0.0; - plane[1] = 0.0; - plane[2] = -1.0; - plane[3] = value; -} - - -static INLINE GLfloat -solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; - return z; -} - -#define SOLVE_PLANE(X, Y, PLANE) \ - ((PLANE[3] + PLANE[0] * (X) + PLANE[1] * (Y)) / -PLANE[2]) - - -/* - * Return 1 / solve_plane(). - */ -static INLINE GLfloat -solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y; - if (denom == 0.0) - return 0.0; - else - return -plane[2] / denom; -} - - -/* - * Solve plane and return clamped GLchan value. - */ -static INLINE GLchan -solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; -#if CHAN_TYPE == GL_FLOAT - return CLAMP(z, 0.0F, CHAN_MAXF); -#else - if (z < 0) - return 0; - else if (z > CHAN_MAX) - return CHAN_MAX; - return (GLchan) IROUND_POS(z); -#endif -} - - -/* - * Compute mipmap level of detail. - */ -static INLINE GLfloat -compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4], - GLfloat invQ, GLfloat width, GLfloat height) -{ - GLfloat dudx = sPlane[0] / sPlane[2] * invQ * width; - GLfloat dudy = sPlane[1] / sPlane[2] * invQ * width; - GLfloat dvdx = tPlane[0] / tPlane[2] * invQ * height; - GLfloat dvdy = tPlane[1] / tPlane[2] * invQ * height; - GLfloat r1 = dudx * dudx + dudy * dudy; - GLfloat r2 = dvdx * dvdx + dvdy * dvdy; - GLfloat rho2 = r1 + r2; - /* return log base 2 of rho */ - if (rho2 == 0.0F) - return 0.0; - else - return (GLfloat) (LOGF(rho2) * 1.442695 * 0.5);/* 1.442695 = 1/log(2) */ -} - - - - -/* - * Fill in the samples[] array with the (x,y) subpixel positions of - * xSamples * ySamples sample positions. - * Note that the four corner samples are put into the first four - * positions of the array. This allows us to optimize for the common - * case of all samples being inside the polygon. - */ -static void -make_sample_table(GLint xSamples, GLint ySamples, GLfloat samples[][2]) -{ - const GLfloat dx = 1.0F / (GLfloat) xSamples; - const GLfloat dy = 1.0F / (GLfloat) ySamples; - GLint x, y; - GLint i; - - i = 4; - for (x = 0; x < xSamples; x++) { - for (y = 0; y < ySamples; y++) { - GLint j; - if (x == 0 && y == 0) { - /* lower left */ - j = 0; - } - else if (x == xSamples - 1 && y == 0) { - /* lower right */ - j = 1; - } - else if (x == 0 && y == ySamples - 1) { - /* upper left */ - j = 2; - } - else if (x == xSamples - 1 && y == ySamples - 1) { - /* upper right */ - j = 3; - } - else { - j = i++; - } - samples[j][0] = x * dx + 0.5F * dx; - samples[j][1] = y * dy + 0.5F * dy; - } - } -} - - - -/* - * Compute how much of the given pixel's area is inside the rectangle - * defined by vertices v0, v1, v2, v3. - * Vertices MUST be specified in counter-clockwise order. - * Return: coverage in [0, 1]. - */ -static GLfloat -compute_coveragef(const struct LineInfo *info, - GLint winx, GLint winy) -{ - static GLfloat samples[SUB_PIXEL * SUB_PIXEL][2]; - static GLboolean haveSamples = GL_FALSE; - const GLfloat x = (GLfloat) winx; - const GLfloat y = (GLfloat) winy; - GLint stop = 4, i; - GLfloat insideCount = SUB_PIXEL * SUB_PIXEL; - - if (!haveSamples) { - make_sample_table(SUB_PIXEL, SUB_PIXEL, samples); - haveSamples = GL_TRUE; - } - -#if 0 /*DEBUG*/ - { - const GLfloat area = dx0 * dy1 - dx1 * dy0; - assert(area >= 0.0); - } -#endif - - for (i = 0; i < stop; i++) { - const GLfloat sx = x + samples[i][0]; - const GLfloat sy = y + samples[i][1]; - const GLfloat fx0 = sx - info->qx0; - const GLfloat fy0 = sy - info->qy0; - const GLfloat fx1 = sx - info->qx1; - const GLfloat fy1 = sy - info->qy1; - const GLfloat fx2 = sx - info->qx2; - const GLfloat fy2 = sy - info->qy2; - const GLfloat fx3 = sx - info->qx3; - const GLfloat fy3 = sy - info->qy3; - /* cross product determines if sample is inside or outside each edge */ - GLfloat cross0 = (info->ex0 * fy0 - info->ey0 * fx0); - GLfloat cross1 = (info->ex1 * fy1 - info->ey1 * fx1); - GLfloat cross2 = (info->ex2 * fy2 - info->ey2 * fx2); - GLfloat cross3 = (info->ex3 * fy3 - info->ey3 * fx3); - /* Check if the sample is exactly on an edge. If so, let cross be a - * positive or negative value depending on the direction of the edge. - */ - if (cross0 == 0.0F) - cross0 = info->ex0 + info->ey0; - if (cross1 == 0.0F) - cross1 = info->ex1 + info->ey1; - if (cross2 == 0.0F) - cross2 = info->ex2 + info->ey2; - if (cross3 == 0.0F) - cross3 = info->ex3 + info->ey3; - if (cross0 < 0.0F || cross1 < 0.0F || cross2 < 0.0F || cross3 < 0.0F) { - /* point is outside quadrilateral */ - insideCount -= 1.0F; - stop = SUB_PIXEL * SUB_PIXEL; - } - } - if (stop == 4) - return 1.0F; - else - return insideCount * (1.0F / (SUB_PIXEL * SUB_PIXEL)); -} - - -typedef void (*plot_func)(GLcontext *ctx, struct LineInfo *line, - int ix, int iy); - - - -/* - * Draw an AA line segment (called many times per line when stippling) - */ -static void -segment(GLcontext *ctx, - struct LineInfo *line, - plot_func plot, - GLfloat t0, GLfloat t1) -{ - const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx; - const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy; - /* compute the actual segment's endpoints */ - const GLfloat x0 = line->x0 + t0 * line->dx; - const GLfloat y0 = line->y0 + t0 * line->dy; - const GLfloat x1 = line->x0 + t1 * line->dx; - const GLfloat y1 = line->y0 + t1 * line->dy; - - /* compute vertices of the line-aligned quadrilateral */ - line->qx0 = x0 - line->yAdj; - line->qy0 = y0 + line->xAdj; - line->qx1 = x0 + line->yAdj; - line->qy1 = y0 - line->xAdj; - line->qx2 = x1 + line->yAdj; - line->qy2 = y1 - line->xAdj; - line->qx3 = x1 - line->yAdj; - line->qy3 = y1 + line->xAdj; - /* compute the quad's edge vectors (for coverage calc) */ - line->ex0 = line->qx1 - line->qx0; - line->ey0 = line->qy1 - line->qy0; - line->ex1 = line->qx2 - line->qx1; - line->ey1 = line->qy2 - line->qy1; - line->ex2 = line->qx3 - line->qx2; - line->ey2 = line->qy3 - line->qy2; - line->ex3 = line->qx0 - line->qx3; - line->ey3 = line->qy0 - line->qy3; - - if (absDx > absDy) { - /* X-major line */ - GLfloat dydx = line->dy / line->dx; - GLfloat xLeft, xRight, yBot, yTop; - GLint ix, ixRight; - if (x0 < x1) { - xLeft = x0 - line->halfWidth; - xRight = x1 + line->halfWidth; - if (line->dy >= 0.0) { - yBot = y0 - 3.0F * line->halfWidth; - yTop = y0 + line->halfWidth; - } - else { - yBot = y0 - line->halfWidth; - yTop = y0 + 3.0F * line->halfWidth; - } - } - else { - xLeft = x1 - line->halfWidth; - xRight = x0 + line->halfWidth; - if (line->dy <= 0.0) { - yBot = y1 - 3.0F * line->halfWidth; - yTop = y1 + line->halfWidth; - } - else { - yBot = y1 - line->halfWidth; - yTop = y1 + 3.0F * line->halfWidth; - } - } - - /* scan along the line, left-to-right */ - ixRight = (GLint) (xRight + 1.0F); - - /*printf("avg span height: %g\n", yTop - yBot);*/ - for (ix = (GLint) xLeft; ix < ixRight; ix++) { - const GLint iyBot = (GLint) yBot; - const GLint iyTop = (GLint) (yTop + 1.0F); - GLint iy; - /* scan across the line, bottom-to-top */ - for (iy = iyBot; iy < iyTop; iy++) { - (*plot)(ctx, line, ix, iy); - } - yBot += dydx; - yTop += dydx; - } - } - else { - /* Y-major line */ - GLfloat dxdy = line->dx / line->dy; - GLfloat yBot, yTop, xLeft, xRight; - GLint iy, iyTop; - if (y0 < y1) { - yBot = y0 - line->halfWidth; - yTop = y1 + line->halfWidth; - if (line->dx >= 0.0) { - xLeft = x0 - 3.0F * line->halfWidth; - xRight = x0 + line->halfWidth; - } - else { - xLeft = x0 - line->halfWidth; - xRight = x0 + 3.0F * line->halfWidth; - } - } - else { - yBot = y1 - line->halfWidth; - yTop = y0 + line->halfWidth; - if (line->dx <= 0.0) { - xLeft = x1 - 3.0F * line->halfWidth; - xRight = x1 + line->halfWidth; - } - else { - xLeft = x1 - line->halfWidth; - xRight = x1 + 3.0F * line->halfWidth; - } - } - - /* scan along the line, bottom-to-top */ - iyTop = (GLint) (yTop + 1.0F); - - /*printf("avg span width: %g\n", xRight - xLeft);*/ - for (iy = (GLint) yBot; iy < iyTop; iy++) { - const GLint ixLeft = (GLint) xLeft; - const GLint ixRight = (GLint) (xRight + 1.0F); - GLint ix; - /* scan across the line, left-to-right */ - for (ix = ixLeft; ix < ixRight; ix++) { - (*plot)(ctx, line, ix, iy); - } - xLeft += dxdy; - xRight += dxdy; - } - } -} - - -#define NAME(x) aa_rgba_##x -#define DO_Z -#include "s_aalinetemp.h" - - -#define NAME(x) aa_general_rgba_##x -#define DO_Z -#define DO_ATTRIBS -#include "s_aalinetemp.h" - - - -void -_swrast_choose_aa_line_function(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - ASSERT(ctx->Line.SmoothFlag); - - if (ctx->Texture._EnabledCoordUnits != 0 - || ctx->FragmentProgram._Current - || (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) - || ctx->Fog.ColorSumEnabled - || swrast->_FogEnabled) { - swrast->Line = aa_general_rgba_line; - } - else { - swrast->Line = aa_rgba_line; - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "swrast/s_aaline.h"
+#include "swrast/s_context.h"
+#include "swrast/s_span.h"
+#include "swrast/swrast.h"
+
+
+#define SUB_PIXEL 4
+
+
+/*
+ * Info about the AA line we're rendering
+ */
+struct LineInfo
+{
+ GLfloat x0, y0; /* start */
+ GLfloat x1, y1; /* end */
+ GLfloat dx, dy; /* direction vector */
+ GLfloat len; /* length */
+ GLfloat halfWidth; /* half of line width */
+ GLfloat xAdj, yAdj; /* X and Y adjustment for quad corners around line */
+ /* for coverage computation */
+ GLfloat qx0, qy0; /* quad vertices */
+ GLfloat qx1, qy1;
+ GLfloat qx2, qy2;
+ GLfloat qx3, qy3;
+ GLfloat ex0, ey0; /* quad edge vectors */
+ GLfloat ex1, ey1;
+ GLfloat ex2, ey2;
+ GLfloat ex3, ey3;
+
+ /* DO_Z */
+ GLfloat zPlane[4];
+ /* DO_RGBA - always enabled */
+ GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
+ /* DO_ATTRIBS */
+ GLfloat wPlane[4];
+ GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4];
+ GLfloat lambda[FRAG_ATTRIB_MAX];
+ GLfloat texWidth[FRAG_ATTRIB_MAX];
+ GLfloat texHeight[FRAG_ATTRIB_MAX];
+
+ SWspan span;
+};
+
+
+
+/*
+ * Compute the equation of a plane used to interpolate line fragment data
+ * such as color, Z, texture coords, etc.
+ * Input: (x0, y0) and (x1,y1) are the endpoints of the line.
+ * z0, and z1 are the end point values to interpolate.
+ * Output: plane - the plane equation.
+ *
+ * Note: we don't really have enough parameters to specify a plane.
+ * We take the endpoints of the line and compute a plane such that
+ * the cross product of the line vector and the plane normal is
+ * parallel to the projection plane.
+ */
+static void
+compute_plane(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1,
+ GLfloat z0, GLfloat z1, GLfloat plane[4])
+{
+#if 0
+ /* original */
+ const GLfloat px = x1 - x0;
+ const GLfloat py = y1 - y0;
+ const GLfloat pz = z1 - z0;
+ const GLfloat qx = -py;
+ const GLfloat qy = px;
+ const GLfloat qz = 0;
+ const GLfloat a = py * qz - pz * qy;
+ const GLfloat b = pz * qx - px * qz;
+ const GLfloat c = px * qy - py * qx;
+ const GLfloat d = -(a * x0 + b * y0 + c * z0);
+ plane[0] = a;
+ plane[1] = b;
+ plane[2] = c;
+ plane[3] = d;
+#else
+ /* simplified */
+ const GLfloat px = x1 - x0;
+ const GLfloat py = y1 - y0;
+ const GLfloat pz = z0 - z1;
+ const GLfloat a = pz * px;
+ const GLfloat b = pz * py;
+ const GLfloat c = px * px + py * py;
+ const GLfloat d = -(a * x0 + b * y0 + c * z0);
+ if (a == 0.0 && b == 0.0 && c == 0.0 && d == 0.0) {
+ plane[0] = 0.0;
+ plane[1] = 0.0;
+ plane[2] = 1.0;
+ plane[3] = 0.0;
+ }
+ else {
+ plane[0] = a;
+ plane[1] = b;
+ plane[2] = c;
+ plane[3] = d;
+ }
+#endif
+}
+
+
+static INLINE void
+constant_plane(GLfloat value, GLfloat plane[4])
+{
+ plane[0] = 0.0;
+ plane[1] = 0.0;
+ plane[2] = -1.0;
+ plane[3] = value;
+}
+
+
+static INLINE GLfloat
+solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+ return z;
+}
+
+#define SOLVE_PLANE(X, Y, PLANE) \
+ ((PLANE[3] + PLANE[0] * (X) + PLANE[1] * (Y)) / -PLANE[2])
+
+
+/*
+ * Return 1 / solve_plane().
+ */
+static INLINE GLfloat
+solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y;
+ if (denom == 0.0)
+ return 0.0;
+ else
+ return -plane[2] / denom;
+}
+
+
+/*
+ * Solve plane and return clamped GLchan value.
+ */
+static INLINE GLchan
+solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+#if CHAN_TYPE == GL_FLOAT
+ return CLAMP(z, 0.0F, CHAN_MAXF);
+#else
+ if (z < 0)
+ return 0;
+ else if (z > CHAN_MAX)
+ return CHAN_MAX;
+ return (GLchan) IROUND_POS(z);
+#endif
+}
+
+
+/*
+ * Compute mipmap level of detail.
+ */
+static INLINE GLfloat
+compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4],
+ GLfloat invQ, GLfloat width, GLfloat height)
+{
+ GLfloat dudx = sPlane[0] / sPlane[2] * invQ * width;
+ GLfloat dudy = sPlane[1] / sPlane[2] * invQ * width;
+ GLfloat dvdx = tPlane[0] / tPlane[2] * invQ * height;
+ GLfloat dvdy = tPlane[1] / tPlane[2] * invQ * height;
+ GLfloat r1 = dudx * dudx + dudy * dudy;
+ GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
+ GLfloat rho2 = r1 + r2;
+ /* return log base 2 of rho */
+ if (rho2 == 0.0F)
+ return 0.0;
+ else
+ return (GLfloat) (LOGF(rho2) * 1.442695 * 0.5);/* 1.442695 = 1/log(2) */
+}
+
+
+
+
+/*
+ * Fill in the samples[] array with the (x,y) subpixel positions of
+ * xSamples * ySamples sample positions.
+ * Note that the four corner samples are put into the first four
+ * positions of the array. This allows us to optimize for the common
+ * case of all samples being inside the polygon.
+ */
+static void
+make_sample_table(GLint xSamples, GLint ySamples, GLfloat samples[][2])
+{
+ const GLfloat dx = 1.0F / (GLfloat) xSamples;
+ const GLfloat dy = 1.0F / (GLfloat) ySamples;
+ GLint x, y;
+ GLint i;
+
+ i = 4;
+ for (x = 0; x < xSamples; x++) {
+ for (y = 0; y < ySamples; y++) {
+ GLint j;
+ if (x == 0 && y == 0) {
+ /* lower left */
+ j = 0;
+ }
+ else if (x == xSamples - 1 && y == 0) {
+ /* lower right */
+ j = 1;
+ }
+ else if (x == 0 && y == ySamples - 1) {
+ /* upper left */
+ j = 2;
+ }
+ else if (x == xSamples - 1 && y == ySamples - 1) {
+ /* upper right */
+ j = 3;
+ }
+ else {
+ j = i++;
+ }
+ samples[j][0] = x * dx + 0.5F * dx;
+ samples[j][1] = y * dy + 0.5F * dy;
+ }
+ }
+}
+
+
+
+/*
+ * Compute how much of the given pixel's area is inside the rectangle
+ * defined by vertices v0, v1, v2, v3.
+ * Vertices MUST be specified in counter-clockwise order.
+ * Return: coverage in [0, 1].
+ */
+static GLfloat
+compute_coveragef(const struct LineInfo *info,
+ GLint winx, GLint winy)
+{
+ static GLfloat samples[SUB_PIXEL * SUB_PIXEL][2];
+ static GLboolean haveSamples = GL_FALSE;
+ const GLfloat x = (GLfloat) winx;
+ const GLfloat y = (GLfloat) winy;
+ GLint stop = 4, i;
+ GLfloat insideCount = SUB_PIXEL * SUB_PIXEL;
+
+ if (!haveSamples) {
+ make_sample_table(SUB_PIXEL, SUB_PIXEL, samples);
+ haveSamples = GL_TRUE;
+ }
+
+#if 0 /*DEBUG*/
+ {
+ const GLfloat area = dx0 * dy1 - dx1 * dy0;
+ assert(area >= 0.0);
+ }
+#endif
+
+ for (i = 0; i < stop; i++) {
+ const GLfloat sx = x + samples[i][0];
+ const GLfloat sy = y + samples[i][1];
+ const GLfloat fx0 = sx - info->qx0;
+ const GLfloat fy0 = sy - info->qy0;
+ const GLfloat fx1 = sx - info->qx1;
+ const GLfloat fy1 = sy - info->qy1;
+ const GLfloat fx2 = sx - info->qx2;
+ const GLfloat fy2 = sy - info->qy2;
+ const GLfloat fx3 = sx - info->qx3;
+ const GLfloat fy3 = sy - info->qy3;
+ /* cross product determines if sample is inside or outside each edge */
+ GLfloat cross0 = (info->ex0 * fy0 - info->ey0 * fx0);
+ GLfloat cross1 = (info->ex1 * fy1 - info->ey1 * fx1);
+ GLfloat cross2 = (info->ex2 * fy2 - info->ey2 * fx2);
+ GLfloat cross3 = (info->ex3 * fy3 - info->ey3 * fx3);
+ /* Check if the sample is exactly on an edge. If so, let cross be a
+ * positive or negative value depending on the direction of the edge.
+ */
+ if (cross0 == 0.0F)
+ cross0 = info->ex0 + info->ey0;
+ if (cross1 == 0.0F)
+ cross1 = info->ex1 + info->ey1;
+ if (cross2 == 0.0F)
+ cross2 = info->ex2 + info->ey2;
+ if (cross3 == 0.0F)
+ cross3 = info->ex3 + info->ey3;
+ if (cross0 < 0.0F || cross1 < 0.0F || cross2 < 0.0F || cross3 < 0.0F) {
+ /* point is outside quadrilateral */
+ insideCount -= 1.0F;
+ stop = SUB_PIXEL * SUB_PIXEL;
+ }
+ }
+ if (stop == 4)
+ return 1.0F;
+ else
+ return insideCount * (1.0F / (SUB_PIXEL * SUB_PIXEL));
+}
+
+
+typedef void (*plot_func)(struct gl_context *ctx, struct LineInfo *line,
+ int ix, int iy);
+
+
+
+/*
+ * Draw an AA line segment (called many times per line when stippling)
+ */
+static void
+segment(struct gl_context *ctx,
+ struct LineInfo *line,
+ plot_func plot,
+ GLfloat t0, GLfloat t1)
+{
+ const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx;
+ const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy;
+ /* compute the actual segment's endpoints */
+ const GLfloat x0 = line->x0 + t0 * line->dx;
+ const GLfloat y0 = line->y0 + t0 * line->dy;
+ const GLfloat x1 = line->x0 + t1 * line->dx;
+ const GLfloat y1 = line->y0 + t1 * line->dy;
+
+ /* compute vertices of the line-aligned quadrilateral */
+ line->qx0 = x0 - line->yAdj;
+ line->qy0 = y0 + line->xAdj;
+ line->qx1 = x0 + line->yAdj;
+ line->qy1 = y0 - line->xAdj;
+ line->qx2 = x1 + line->yAdj;
+ line->qy2 = y1 - line->xAdj;
+ line->qx3 = x1 - line->yAdj;
+ line->qy3 = y1 + line->xAdj;
+ /* compute the quad's edge vectors (for coverage calc) */
+ line->ex0 = line->qx1 - line->qx0;
+ line->ey0 = line->qy1 - line->qy0;
+ line->ex1 = line->qx2 - line->qx1;
+ line->ey1 = line->qy2 - line->qy1;
+ line->ex2 = line->qx3 - line->qx2;
+ line->ey2 = line->qy3 - line->qy2;
+ line->ex3 = line->qx0 - line->qx3;
+ line->ey3 = line->qy0 - line->qy3;
+
+ if (absDx > absDy) {
+ /* X-major line */
+ GLfloat dydx = line->dy / line->dx;
+ GLfloat xLeft, xRight, yBot, yTop;
+ GLint ix, ixRight;
+ if (x0 < x1) {
+ xLeft = x0 - line->halfWidth;
+ xRight = x1 + line->halfWidth;
+ if (line->dy >= 0.0) {
+ yBot = y0 - 3.0F * line->halfWidth;
+ yTop = y0 + line->halfWidth;
+ }
+ else {
+ yBot = y0 - line->halfWidth;
+ yTop = y0 + 3.0F * line->halfWidth;
+ }
+ }
+ else {
+ xLeft = x1 - line->halfWidth;
+ xRight = x0 + line->halfWidth;
+ if (line->dy <= 0.0) {
+ yBot = y1 - 3.0F * line->halfWidth;
+ yTop = y1 + line->halfWidth;
+ }
+ else {
+ yBot = y1 - line->halfWidth;
+ yTop = y1 + 3.0F * line->halfWidth;
+ }
+ }
+
+ /* scan along the line, left-to-right */
+ ixRight = (GLint) (xRight + 1.0F);
+
+ /*printf("avg span height: %g\n", yTop - yBot);*/
+ for (ix = (GLint) xLeft; ix < ixRight; ix++) {
+ const GLint iyBot = (GLint) yBot;
+ const GLint iyTop = (GLint) (yTop + 1.0F);
+ GLint iy;
+ /* scan across the line, bottom-to-top */
+ for (iy = iyBot; iy < iyTop; iy++) {
+ (*plot)(ctx, line, ix, iy);
+ }
+ yBot += dydx;
+ yTop += dydx;
+ }
+ }
+ else {
+ /* Y-major line */
+ GLfloat dxdy = line->dx / line->dy;
+ GLfloat yBot, yTop, xLeft, xRight;
+ GLint iy, iyTop;
+ if (y0 < y1) {
+ yBot = y0 - line->halfWidth;
+ yTop = y1 + line->halfWidth;
+ if (line->dx >= 0.0) {
+ xLeft = x0 - 3.0F * line->halfWidth;
+ xRight = x0 + line->halfWidth;
+ }
+ else {
+ xLeft = x0 - line->halfWidth;
+ xRight = x0 + 3.0F * line->halfWidth;
+ }
+ }
+ else {
+ yBot = y1 - line->halfWidth;
+ yTop = y0 + line->halfWidth;
+ if (line->dx <= 0.0) {
+ xLeft = x1 - 3.0F * line->halfWidth;
+ xRight = x1 + line->halfWidth;
+ }
+ else {
+ xLeft = x1 - line->halfWidth;
+ xRight = x1 + 3.0F * line->halfWidth;
+ }
+ }
+
+ /* scan along the line, bottom-to-top */
+ iyTop = (GLint) (yTop + 1.0F);
+
+ /*printf("avg span width: %g\n", xRight - xLeft);*/
+ for (iy = (GLint) yBot; iy < iyTop; iy++) {
+ const GLint ixLeft = (GLint) xLeft;
+ const GLint ixRight = (GLint) (xRight + 1.0F);
+ GLint ix;
+ /* scan across the line, left-to-right */
+ for (ix = ixLeft; ix < ixRight; ix++) {
+ (*plot)(ctx, line, ix, iy);
+ }
+ xLeft += dxdy;
+ xRight += dxdy;
+ }
+ }
+}
+
+
+#define NAME(x) aa_rgba_##x
+#define DO_Z
+#include "s_aalinetemp.h"
+
+
+#define NAME(x) aa_general_rgba_##x
+#define DO_Z
+#define DO_ATTRIBS
+#include "s_aalinetemp.h"
+
+
+
+void
+_swrast_choose_aa_line_function(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ ASSERT(ctx->Line.SmoothFlag);
+
+ if (ctx->Texture._EnabledCoordUnits != 0
+ || ctx->FragmentProgram._Current
+ || (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
+ || ctx->Fog.ColorSumEnabled
+ || swrast->_FogEnabled) {
+ swrast->Line = aa_general_rgba_line;
+ }
+ else {
+ swrast->Line = aa_rgba_line;
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_aaline.h b/mesalib/src/mesa/swrast/s_aaline.h index 922eb230e..993c12eab 100644 --- a/mesalib/src/mesa/swrast/s_aaline.h +++ b/mesalib/src/mesa/swrast/s_aaline.h @@ -1,38 +1,38 @@ - -/* - * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_AALINE_H -#define S_AALINE_H - - -#include "main/mtypes.h" - - -extern void -_swrast_choose_aa_line_function(GLcontext *ctx); - - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_AALINE_H
+#define S_AALINE_H
+
+
+struct gl_context;
+
+
+extern void
+_swrast_choose_aa_line_function(struct gl_context *ctx);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_aalinetemp.h b/mesalib/src/mesa/swrast/s_aalinetemp.h index c28d47a67..7c535669b 100644 --- a/mesalib/src/mesa/swrast/s_aalinetemp.h +++ b/mesalib/src/mesa/swrast/s_aalinetemp.h @@ -1,242 +1,242 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Antialiased line template. - */ - - -/* - * Function to render each fragment in the AA line. - * \param ix - integer fragment window X coordiante - * \param iy - integer fragment window Y coordiante - */ -static void -NAME(plot)(GLcontext *ctx, struct LineInfo *line, int ix, int iy) -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLfloat fx = (GLfloat) ix; - const GLfloat fy = (GLfloat) iy; - const GLfloat coverage = compute_coveragef(line, ix, iy); - const GLuint i = line->span.end; - - (void) swrast; - - if (coverage == 0.0) - return; - - line->span.end++; - line->span.array->coverage[i] = coverage; - line->span.array->x[i] = ix; - line->span.array->y[i] = iy; - - /* - * Compute Z, color, texture coords, fog for the fragment by - * solving the plane equations at (ix,iy). - */ -#ifdef DO_Z - line->span.array->z[i] = (GLuint) solve_plane(fx, fy, line->zPlane); -#endif - line->span.array->rgba[i][RCOMP] = solve_plane_chan(fx, fy, line->rPlane); - line->span.array->rgba[i][GCOMP] = solve_plane_chan(fx, fy, line->gPlane); - line->span.array->rgba[i][BCOMP] = solve_plane_chan(fx, fy, line->bPlane); - line->span.array->rgba[i][ACOMP] = solve_plane_chan(fx, fy, line->aPlane); -#if defined(DO_ATTRIBS) - ATTRIB_LOOP_BEGIN - GLfloat (*attribArray)[4] = line->span.array->attribs[attr]; - if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0 - && !ctx->FragmentProgram._Current) { - /* texcoord w/ divide by Q */ - const GLuint unit = attr - FRAG_ATTRIB_TEX0; - const GLfloat invQ = solve_plane_recip(fx, fy, line->attrPlane[attr][3]); - GLuint c; - for (c = 0; c < 3; c++) { - attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invQ; - } - line->span.array->lambda[unit][i] - = compute_lambda(line->attrPlane[attr][0], - line->attrPlane[attr][1], invQ, - line->texWidth[attr], line->texHeight[attr]); - } - else { - /* non-texture attrib */ - const GLfloat invW = solve_plane_recip(fx, fy, line->wPlane); - GLuint c; - for (c = 0; c < 4; c++) { - attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invW; - } - } - ATTRIB_LOOP_END -#endif - - if (line->span.end == MAX_WIDTH) { - _swrast_write_rgba_span(ctx, &(line->span)); - line->span.end = 0; /* reset counter */ - } -} - - - -/* - * Line setup - */ -static void -NAME(line)(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLfloat tStart, tEnd; /* segment start, end along line length */ - GLboolean inSegment; - GLint iLen, i; - - /* Init the LineInfo struct */ - struct LineInfo line; - line.x0 = v0->attrib[FRAG_ATTRIB_WPOS][0]; - line.y0 = v0->attrib[FRAG_ATTRIB_WPOS][1]; - line.x1 = v1->attrib[FRAG_ATTRIB_WPOS][0]; - line.y1 = v1->attrib[FRAG_ATTRIB_WPOS][1]; - line.dx = line.x1 - line.x0; - line.dy = line.y1 - line.y0; - line.len = SQRTF(line.dx * line.dx + line.dy * line.dy); - line.halfWidth = 0.5F * CLAMP(ctx->Line.Width, - ctx->Const.MinLineWidthAA, - ctx->Const.MaxLineWidthAA); - - if (line.len == 0.0 || IS_INF_OR_NAN(line.len)) - return; - - INIT_SPAN(line.span, GL_LINE); - line.span.arrayMask = SPAN_XY | SPAN_COVERAGE; - line.span.facing = swrast->PointLineFacing; - line.xAdj = line.dx / line.len * line.halfWidth; - line.yAdj = line.dy / line.len * line.halfWidth; - -#ifdef DO_Z - line.span.arrayMask |= SPAN_Z; - compute_plane(line.x0, line.y0, line.x1, line.y1, - v0->attrib[FRAG_ATTRIB_WPOS][2], v1->attrib[FRAG_ATTRIB_WPOS][2], line.zPlane); -#endif - line.span.arrayMask |= SPAN_RGBA; - if (ctx->Light.ShadeModel == GL_SMOOTH) { - compute_plane(line.x0, line.y0, line.x1, line.y1, - v0->color[RCOMP], v1->color[RCOMP], line.rPlane); - compute_plane(line.x0, line.y0, line.x1, line.y1, - v0->color[GCOMP], v1->color[GCOMP], line.gPlane); - compute_plane(line.x0, line.y0, line.x1, line.y1, - v0->color[BCOMP], v1->color[BCOMP], line.bPlane); - compute_plane(line.x0, line.y0, line.x1, line.y1, - v0->color[ACOMP], v1->color[ACOMP], line.aPlane); - } - else { - constant_plane(v1->color[RCOMP], line.rPlane); - constant_plane(v1->color[GCOMP], line.gPlane); - constant_plane(v1->color[BCOMP], line.bPlane); - constant_plane(v1->color[ACOMP], line.aPlane); - } -#if defined(DO_ATTRIBS) - { - const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat invW1 = v1->attrib[FRAG_ATTRIB_WPOS][3]; - line.span.arrayMask |= SPAN_LAMBDA; - compute_plane(line.x0, line.y0, line.x1, line.y1, invW0, invW1, line.wPlane); - ATTRIB_LOOP_BEGIN - GLuint c; - if (swrast->_InterpMode[attr] == GL_FLAT) { - for (c = 0; c < 4; c++) { - constant_plane(v1->attrib[attr][c], line.attrPlane[attr][c]); - } - } - else { - for (c = 0; c < 4; c++) { - const GLfloat a0 = v0->attrib[attr][c] * invW0; - const GLfloat a1 = v1->attrib[attr][c] * invW1; - compute_plane(line.x0, line.y0, line.x1, line.y1, a0, a1, - line.attrPlane[attr][c]); - } - } - line.span.arrayAttribs |= (1 << attr); - if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0) { - const GLuint u = attr - FRAG_ATTRIB_TEX0; - const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current; - const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel]; - line.texWidth[attr] = (GLfloat) texImage->Width; - line.texHeight[attr] = (GLfloat) texImage->Height; - } - ATTRIB_LOOP_END - } -#endif - - tStart = tEnd = 0.0; - inSegment = GL_FALSE; - iLen = (GLint) line.len; - - if (ctx->Line.StippleFlag) { - for (i = 0; i < iLen; i++) { - const GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf; - if ((1 << bit) & ctx->Line.StipplePattern) { - /* stipple bit is on */ - const GLfloat t = (GLfloat) i / (GLfloat) line.len; - if (!inSegment) { - /* start new segment */ - inSegment = GL_TRUE; - tStart = t; - } - else { - /* still in the segment, extend it */ - tEnd = t; - } - } - else { - /* stipple bit is off */ - if (inSegment && (tEnd > tStart)) { - /* draw the segment */ - segment(ctx, &line, NAME(plot), tStart, tEnd); - inSegment = GL_FALSE; - } - else { - /* still between segments, do nothing */ - } - } - swrast->StippleCounter++; - } - - if (inSegment) { - /* draw the final segment of the line */ - segment(ctx, &line, NAME(plot), tStart, 1.0F); - } - } - else { - /* non-stippled */ - segment(ctx, &line, NAME(plot), 0.0, 1.0); - } - - _swrast_write_rgba_span(ctx, &(line.span)); -} - - - - -#undef DO_Z -#undef DO_ATTRIBS -#undef NAME +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Antialiased line template.
+ */
+
+
+/*
+ * Function to render each fragment in the AA line.
+ * \param ix - integer fragment window X coordiante
+ * \param iy - integer fragment window Y coordiante
+ */
+static void
+NAME(plot)(struct gl_context *ctx, struct LineInfo *line, int ix, int iy)
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLfloat fx = (GLfloat) ix;
+ const GLfloat fy = (GLfloat) iy;
+ const GLfloat coverage = compute_coveragef(line, ix, iy);
+ const GLuint i = line->span.end;
+
+ (void) swrast;
+
+ if (coverage == 0.0)
+ return;
+
+ line->span.end++;
+ line->span.array->coverage[i] = coverage;
+ line->span.array->x[i] = ix;
+ line->span.array->y[i] = iy;
+
+ /*
+ * Compute Z, color, texture coords, fog for the fragment by
+ * solving the plane equations at (ix,iy).
+ */
+#ifdef DO_Z
+ line->span.array->z[i] = (GLuint) solve_plane(fx, fy, line->zPlane);
+#endif
+ line->span.array->rgba[i][RCOMP] = solve_plane_chan(fx, fy, line->rPlane);
+ line->span.array->rgba[i][GCOMP] = solve_plane_chan(fx, fy, line->gPlane);
+ line->span.array->rgba[i][BCOMP] = solve_plane_chan(fx, fy, line->bPlane);
+ line->span.array->rgba[i][ACOMP] = solve_plane_chan(fx, fy, line->aPlane);
+#if defined(DO_ATTRIBS)
+ ATTRIB_LOOP_BEGIN
+ GLfloat (*attribArray)[4] = line->span.array->attribs[attr];
+ if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0
+ && !ctx->FragmentProgram._Current) {
+ /* texcoord w/ divide by Q */
+ const GLuint unit = attr - FRAG_ATTRIB_TEX0;
+ const GLfloat invQ = solve_plane_recip(fx, fy, line->attrPlane[attr][3]);
+ GLuint c;
+ for (c = 0; c < 3; c++) {
+ attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invQ;
+ }
+ line->span.array->lambda[unit][i]
+ = compute_lambda(line->attrPlane[attr][0],
+ line->attrPlane[attr][1], invQ,
+ line->texWidth[attr], line->texHeight[attr]);
+ }
+ else {
+ /* non-texture attrib */
+ const GLfloat invW = solve_plane_recip(fx, fy, line->wPlane);
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invW;
+ }
+ }
+ ATTRIB_LOOP_END
+#endif
+
+ if (line->span.end == MAX_WIDTH) {
+ _swrast_write_rgba_span(ctx, &(line->span));
+ line->span.end = 0; /* reset counter */
+ }
+}
+
+
+
+/*
+ * Line setup
+ */
+static void
+NAME(line)(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat tStart, tEnd; /* segment start, end along line length */
+ GLboolean inSegment;
+ GLint iLen, i;
+
+ /* Init the LineInfo struct */
+ struct LineInfo line;
+ line.x0 = v0->attrib[FRAG_ATTRIB_WPOS][0];
+ line.y0 = v0->attrib[FRAG_ATTRIB_WPOS][1];
+ line.x1 = v1->attrib[FRAG_ATTRIB_WPOS][0];
+ line.y1 = v1->attrib[FRAG_ATTRIB_WPOS][1];
+ line.dx = line.x1 - line.x0;
+ line.dy = line.y1 - line.y0;
+ line.len = SQRTF(line.dx * line.dx + line.dy * line.dy);
+ line.halfWidth = 0.5F * CLAMP(ctx->Line.Width,
+ ctx->Const.MinLineWidthAA,
+ ctx->Const.MaxLineWidthAA);
+
+ if (line.len == 0.0 || IS_INF_OR_NAN(line.len))
+ return;
+
+ INIT_SPAN(line.span, GL_LINE);
+ line.span.arrayMask = SPAN_XY | SPAN_COVERAGE;
+ line.span.facing = swrast->PointLineFacing;
+ line.xAdj = line.dx / line.len * line.halfWidth;
+ line.yAdj = line.dy / line.len * line.halfWidth;
+
+#ifdef DO_Z
+ line.span.arrayMask |= SPAN_Z;
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->attrib[FRAG_ATTRIB_WPOS][2], v1->attrib[FRAG_ATTRIB_WPOS][2], line.zPlane);
+#endif
+ line.span.arrayMask |= SPAN_RGBA;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->color[RCOMP], v1->color[RCOMP], line.rPlane);
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->color[GCOMP], v1->color[GCOMP], line.gPlane);
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->color[BCOMP], v1->color[BCOMP], line.bPlane);
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->color[ACOMP], v1->color[ACOMP], line.aPlane);
+ }
+ else {
+ constant_plane(v1->color[RCOMP], line.rPlane);
+ constant_plane(v1->color[GCOMP], line.gPlane);
+ constant_plane(v1->color[BCOMP], line.bPlane);
+ constant_plane(v1->color[ACOMP], line.aPlane);
+ }
+#if defined(DO_ATTRIBS)
+ {
+ const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat invW1 = v1->attrib[FRAG_ATTRIB_WPOS][3];
+ line.span.arrayMask |= SPAN_LAMBDA;
+ compute_plane(line.x0, line.y0, line.x1, line.y1, invW0, invW1, line.wPlane);
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ for (c = 0; c < 4; c++) {
+ constant_plane(v1->attrib[attr][c], line.attrPlane[attr][c]);
+ }
+ }
+ else {
+ for (c = 0; c < 4; c++) {
+ const GLfloat a0 = v0->attrib[attr][c] * invW0;
+ const GLfloat a1 = v1->attrib[attr][c] * invW1;
+ compute_plane(line.x0, line.y0, line.x1, line.y1, a0, a1,
+ line.attrPlane[attr][c]);
+ }
+ }
+ line.span.arrayAttribs |= (1 << attr);
+ if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0) {
+ const GLuint u = attr - FRAG_ATTRIB_TEX0;
+ const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current;
+ const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel];
+ line.texWidth[attr] = (GLfloat) texImage->Width;
+ line.texHeight[attr] = (GLfloat) texImage->Height;
+ }
+ ATTRIB_LOOP_END
+ }
+#endif
+
+ tStart = tEnd = 0.0;
+ inSegment = GL_FALSE;
+ iLen = (GLint) line.len;
+
+ if (ctx->Line.StippleFlag) {
+ for (i = 0; i < iLen; i++) {
+ const GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf;
+ if ((1 << bit) & ctx->Line.StipplePattern) {
+ /* stipple bit is on */
+ const GLfloat t = (GLfloat) i / (GLfloat) line.len;
+ if (!inSegment) {
+ /* start new segment */
+ inSegment = GL_TRUE;
+ tStart = t;
+ }
+ else {
+ /* still in the segment, extend it */
+ tEnd = t;
+ }
+ }
+ else {
+ /* stipple bit is off */
+ if (inSegment && (tEnd > tStart)) {
+ /* draw the segment */
+ segment(ctx, &line, NAME(plot), tStart, tEnd);
+ inSegment = GL_FALSE;
+ }
+ else {
+ /* still between segments, do nothing */
+ }
+ }
+ swrast->StippleCounter++;
+ }
+
+ if (inSegment) {
+ /* draw the final segment of the line */
+ segment(ctx, &line, NAME(plot), tStart, 1.0F);
+ }
+ }
+ else {
+ /* non-stippled */
+ segment(ctx, &line, NAME(plot), 0.0, 1.0);
+ }
+
+ _swrast_write_rgba_span(ctx, &(line.span));
+}
+
+
+
+
+#undef DO_Z
+#undef DO_ATTRIBS
+#undef NAME
diff --git a/mesalib/src/mesa/swrast/s_aatriangle.c b/mesalib/src/mesa/swrast/s_aatriangle.c index 1d90f322a..ba92fc14a 100644 --- a/mesalib/src/mesa/swrast/s_aatriangle.c +++ b/mesalib/src/mesa/swrast/s_aatriangle.c @@ -1,317 +1,316 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Antialiased Triangle rasterizers - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/context.h" -#include "main/macros.h" -#include "main/imports.h" -#include "s_aatriangle.h" -#include "s_context.h" -#include "s_span.h" - - -/* - * Compute coefficients of a plane using the X,Y coords of the v0, v1, v2 - * vertices and the given Z values. - * A point (x,y,z) lies on plane iff a*x+b*y+c*z+d = 0. - */ -static INLINE void -compute_plane(const GLfloat v0[], const GLfloat v1[], const GLfloat v2[], - GLfloat z0, GLfloat z1, GLfloat z2, GLfloat plane[4]) -{ - const GLfloat px = v1[0] - v0[0]; - const GLfloat py = v1[1] - v0[1]; - const GLfloat pz = z1 - z0; - - const GLfloat qx = v2[0] - v0[0]; - const GLfloat qy = v2[1] - v0[1]; - const GLfloat qz = z2 - z0; - - /* Crossproduct "(a,b,c):= dv1 x dv2" is orthogonal to plane. */ - const GLfloat a = py * qz - pz * qy; - const GLfloat b = pz * qx - px * qz; - const GLfloat c = px * qy - py * qx; - /* Point on the plane = "r*(a,b,c) + w", with fixed "r" depending - on the distance of plane from origin and arbitrary "w" parallel - to the plane. */ - /* The scalar product "(r*(a,b,c)+w)*(a,b,c)" is "r*(a^2+b^2+c^2)", - which is equal to "-d" below. */ - const GLfloat d = -(a * v0[0] + b * v0[1] + c * z0); - - plane[0] = a; - plane[1] = b; - plane[2] = c; - plane[3] = d; -} - - -/* - * Compute coefficients of a plane with a constant Z value. - */ -static INLINE void -constant_plane(GLfloat value, GLfloat plane[4]) -{ - plane[0] = 0.0; - plane[1] = 0.0; - plane[2] = -1.0; - plane[3] = value; -} - -#define CONSTANT_PLANE(VALUE, PLANE) \ -do { \ - PLANE[0] = 0.0F; \ - PLANE[1] = 0.0F; \ - PLANE[2] = -1.0F; \ - PLANE[3] = VALUE; \ -} while (0) - - - -/* - * Solve plane equation for Z at (X,Y). - */ -static INLINE GLfloat -solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - ASSERT(plane[2] != 0.0F); - return (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; -} - - -#define SOLVE_PLANE(X, Y, PLANE) \ - ((PLANE[3] + PLANE[0] * (X) + PLANE[1] * (Y)) / -PLANE[2]) - - -/* - * Return 1 / solve_plane(). - */ -static INLINE GLfloat -solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y; - if (denom == 0.0F) - return 0.0F; - else - return -plane[2] / denom; -} - - -/* - * Solve plane and return clamped GLchan value. - */ -static INLINE GLchan -solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4]) -{ - const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; -#if CHAN_TYPE == GL_FLOAT - return CLAMP(z, 0.0F, CHAN_MAXF); -#else - if (z < 0) - return 0; - else if (z > CHAN_MAX) - return CHAN_MAX; - return (GLchan) IROUND_POS(z); -#endif -} - - -static INLINE GLfloat -plane_dx(const GLfloat plane[4]) -{ - return -plane[0] / plane[2]; -} - -static INLINE GLfloat -plane_dy(const GLfloat plane[4]) -{ - return -plane[1] / plane[2]; -} - - - -/* - * Compute how much (area) of the given pixel is inside the triangle. - * Vertices MUST be specified in counter-clockwise order. - * Return: coverage in [0, 1]. - */ -static GLfloat -compute_coveragef(const GLfloat v0[3], const GLfloat v1[3], - const GLfloat v2[3], GLint winx, GLint winy) -{ - /* Given a position [0,3]x[0,3] return the sub-pixel sample position. - * Contributed by Ray Tice. - * - * Jitter sample positions - - * - average should be .5 in x & y for each column - * - each of the 16 rows and columns should be used once - * - the rectangle formed by the first four points - * should contain the other points - * - the distrubition should be fairly even in any given direction - * - * The pattern drawn below isn't optimal, but it's better than a regular - * grid. In the drawing, the center of each subpixel is surrounded by - * four dots. The "x" marks the jittered position relative to the - * subpixel center. - */ -#define POS(a, b) (0.5+a*4+b)/16 - static const GLfloat samples[16][2] = { - /* start with the four corners */ - { POS(0, 2), POS(0, 0) }, - { POS(3, 3), POS(0, 2) }, - { POS(0, 0), POS(3, 1) }, - { POS(3, 1), POS(3, 3) }, - /* continue with interior samples */ - { POS(1, 1), POS(0, 1) }, - { POS(2, 0), POS(0, 3) }, - { POS(0, 3), POS(1, 3) }, - { POS(1, 2), POS(1, 0) }, - { POS(2, 3), POS(1, 2) }, - { POS(3, 2), POS(1, 1) }, - { POS(0, 1), POS(2, 2) }, - { POS(1, 0), POS(2, 1) }, - { POS(2, 1), POS(2, 3) }, - { POS(3, 0), POS(2, 0) }, - { POS(1, 3), POS(3, 0) }, - { POS(2, 2), POS(3, 2) } - }; - - const GLfloat x = (GLfloat) winx; - const GLfloat y = (GLfloat) winy; - const GLfloat dx0 = v1[0] - v0[0]; - const GLfloat dy0 = v1[1] - v0[1]; - const GLfloat dx1 = v2[0] - v1[0]; - const GLfloat dy1 = v2[1] - v1[1]; - const GLfloat dx2 = v0[0] - v2[0]; - const GLfloat dy2 = v0[1] - v2[1]; - GLint stop = 4, i; - GLfloat insideCount = 16.0F; - -#ifdef DEBUG - { - const GLfloat area = dx0 * dy1 - dx1 * dy0; - ASSERT(area >= 0.0); - } -#endif - - for (i = 0; i < stop; i++) { - const GLfloat sx = x + samples[i][0]; - const GLfloat sy = y + samples[i][1]; - /* cross product determines if sample is inside or outside each edge */ - GLfloat cross = (dx0 * (sy - v0[1]) - dy0 * (sx - v0[0])); - /* Check if the sample is exactly on an edge. If so, let cross be a - * positive or negative value depending on the direction of the edge. - */ - if (cross == 0.0F) - cross = dx0 + dy0; - if (cross < 0.0F) { - /* sample point is outside first edge */ - insideCount -= 1.0F; - stop = 16; - } - else { - /* sample point is inside first edge */ - cross = (dx1 * (sy - v1[1]) - dy1 * (sx - v1[0])); - if (cross == 0.0F) - cross = dx1 + dy1; - if (cross < 0.0F) { - /* sample point is outside second edge */ - insideCount -= 1.0F; - stop = 16; - } - else { - /* sample point is inside first and second edges */ - cross = (dx2 * (sy - v2[1]) - dy2 * (sx - v2[0])); - if (cross == 0.0F) - cross = dx2 + dy2; - if (cross < 0.0F) { - /* sample point is outside third edge */ - insideCount -= 1.0F; - stop = 16; - } - } - } - } - if (stop == 4) - return 1.0F; - else - return insideCount * (1.0F / 16.0F); -} - - - -static void -rgba_aa_tri(GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2) -{ -#define DO_Z -#include "s_aatritemp.h" -} - - -static void -general_aa_tri(GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2) -{ -#define DO_Z -#define DO_ATTRIBS -#include "s_aatritemp.h" -} - - - -/* - * Examine GL state and set swrast->Triangle to an - * appropriate antialiased triangle rasterizer function. - */ -void -_swrast_set_aa_triangle_function(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - ASSERT(ctx->Polygon.SmoothFlag); - - if (ctx->Texture._EnabledCoordUnits != 0 - || ctx->FragmentProgram._Current - || swrast->_FogEnabled - || NEED_SECONDARY_COLOR(ctx)) { - SWRAST_CONTEXT(ctx)->Triangle = general_aa_tri; - } - else { - SWRAST_CONTEXT(ctx)->Triangle = rgba_aa_tri; - } - - ASSERT(SWRAST_CONTEXT(ctx)->Triangle); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Antialiased Triangle rasterizers
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "s_aatriangle.h"
+#include "s_context.h"
+#include "s_span.h"
+
+
+/*
+ * Compute coefficients of a plane using the X,Y coords of the v0, v1, v2
+ * vertices and the given Z values.
+ * A point (x,y,z) lies on plane iff a*x+b*y+c*z+d = 0.
+ */
+static INLINE void
+compute_plane(const GLfloat v0[], const GLfloat v1[], const GLfloat v2[],
+ GLfloat z0, GLfloat z1, GLfloat z2, GLfloat plane[4])
+{
+ const GLfloat px = v1[0] - v0[0];
+ const GLfloat py = v1[1] - v0[1];
+ const GLfloat pz = z1 - z0;
+
+ const GLfloat qx = v2[0] - v0[0];
+ const GLfloat qy = v2[1] - v0[1];
+ const GLfloat qz = z2 - z0;
+
+ /* Crossproduct "(a,b,c):= dv1 x dv2" is orthogonal to plane. */
+ const GLfloat a = py * qz - pz * qy;
+ const GLfloat b = pz * qx - px * qz;
+ const GLfloat c = px * qy - py * qx;
+ /* Point on the plane = "r*(a,b,c) + w", with fixed "r" depending
+ on the distance of plane from origin and arbitrary "w" parallel
+ to the plane. */
+ /* The scalar product "(r*(a,b,c)+w)*(a,b,c)" is "r*(a^2+b^2+c^2)",
+ which is equal to "-d" below. */
+ const GLfloat d = -(a * v0[0] + b * v0[1] + c * z0);
+
+ plane[0] = a;
+ plane[1] = b;
+ plane[2] = c;
+ plane[3] = d;
+}
+
+
+/*
+ * Compute coefficients of a plane with a constant Z value.
+ */
+static INLINE void
+constant_plane(GLfloat value, GLfloat plane[4])
+{
+ plane[0] = 0.0;
+ plane[1] = 0.0;
+ plane[2] = -1.0;
+ plane[3] = value;
+}
+
+#define CONSTANT_PLANE(VALUE, PLANE) \
+do { \
+ PLANE[0] = 0.0F; \
+ PLANE[1] = 0.0F; \
+ PLANE[2] = -1.0F; \
+ PLANE[3] = VALUE; \
+} while (0)
+
+
+
+/*
+ * Solve plane equation for Z at (X,Y).
+ */
+static INLINE GLfloat
+solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ ASSERT(plane[2] != 0.0F);
+ return (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+}
+
+
+#define SOLVE_PLANE(X, Y, PLANE) \
+ ((PLANE[3] + PLANE[0] * (X) + PLANE[1] * (Y)) / -PLANE[2])
+
+
+/*
+ * Return 1 / solve_plane().
+ */
+static INLINE GLfloat
+solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y;
+ if (denom == 0.0F)
+ return 0.0F;
+ else
+ return -plane[2] / denom;
+}
+
+
+/*
+ * Solve plane and return clamped GLchan value.
+ */
+static INLINE GLchan
+solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])
+{
+ const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+#if CHAN_TYPE == GL_FLOAT
+ return CLAMP(z, 0.0F, CHAN_MAXF);
+#else
+ if (z < 0)
+ return 0;
+ else if (z > CHAN_MAX)
+ return CHAN_MAX;
+ return (GLchan) IROUND_POS(z);
+#endif
+}
+
+
+static INLINE GLfloat
+plane_dx(const GLfloat plane[4])
+{
+ return -plane[0] / plane[2];
+}
+
+static INLINE GLfloat
+plane_dy(const GLfloat plane[4])
+{
+ return -plane[1] / plane[2];
+}
+
+
+
+/*
+ * Compute how much (area) of the given pixel is inside the triangle.
+ * Vertices MUST be specified in counter-clockwise order.
+ * Return: coverage in [0, 1].
+ */
+static GLfloat
+compute_coveragef(const GLfloat v0[3], const GLfloat v1[3],
+ const GLfloat v2[3], GLint winx, GLint winy)
+{
+ /* Given a position [0,3]x[0,3] return the sub-pixel sample position.
+ * Contributed by Ray Tice.
+ *
+ * Jitter sample positions -
+ * - average should be .5 in x & y for each column
+ * - each of the 16 rows and columns should be used once
+ * - the rectangle formed by the first four points
+ * should contain the other points
+ * - the distrubition should be fairly even in any given direction
+ *
+ * The pattern drawn below isn't optimal, but it's better than a regular
+ * grid. In the drawing, the center of each subpixel is surrounded by
+ * four dots. The "x" marks the jittered position relative to the
+ * subpixel center.
+ */
+#define POS(a, b) (0.5+a*4+b)/16
+ static const GLfloat samples[16][2] = {
+ /* start with the four corners */
+ { POS(0, 2), POS(0, 0) },
+ { POS(3, 3), POS(0, 2) },
+ { POS(0, 0), POS(3, 1) },
+ { POS(3, 1), POS(3, 3) },
+ /* continue with interior samples */
+ { POS(1, 1), POS(0, 1) },
+ { POS(2, 0), POS(0, 3) },
+ { POS(0, 3), POS(1, 3) },
+ { POS(1, 2), POS(1, 0) },
+ { POS(2, 3), POS(1, 2) },
+ { POS(3, 2), POS(1, 1) },
+ { POS(0, 1), POS(2, 2) },
+ { POS(1, 0), POS(2, 1) },
+ { POS(2, 1), POS(2, 3) },
+ { POS(3, 0), POS(2, 0) },
+ { POS(1, 3), POS(3, 0) },
+ { POS(2, 2), POS(3, 2) }
+ };
+
+ const GLfloat x = (GLfloat) winx;
+ const GLfloat y = (GLfloat) winy;
+ const GLfloat dx0 = v1[0] - v0[0];
+ const GLfloat dy0 = v1[1] - v0[1];
+ const GLfloat dx1 = v2[0] - v1[0];
+ const GLfloat dy1 = v2[1] - v1[1];
+ const GLfloat dx2 = v0[0] - v2[0];
+ const GLfloat dy2 = v0[1] - v2[1];
+ GLint stop = 4, i;
+ GLfloat insideCount = 16.0F;
+
+#ifdef DEBUG
+ {
+ const GLfloat area = dx0 * dy1 - dx1 * dy0;
+ ASSERT(area >= 0.0);
+ }
+#endif
+
+ for (i = 0; i < stop; i++) {
+ const GLfloat sx = x + samples[i][0];
+ const GLfloat sy = y + samples[i][1];
+ /* cross product determines if sample is inside or outside each edge */
+ GLfloat cross = (dx0 * (sy - v0[1]) - dy0 * (sx - v0[0]));
+ /* Check if the sample is exactly on an edge. If so, let cross be a
+ * positive or negative value depending on the direction of the edge.
+ */
+ if (cross == 0.0F)
+ cross = dx0 + dy0;
+ if (cross < 0.0F) {
+ /* sample point is outside first edge */
+ insideCount -= 1.0F;
+ stop = 16;
+ }
+ else {
+ /* sample point is inside first edge */
+ cross = (dx1 * (sy - v1[1]) - dy1 * (sx - v1[0]));
+ if (cross == 0.0F)
+ cross = dx1 + dy1;
+ if (cross < 0.0F) {
+ /* sample point is outside second edge */
+ insideCount -= 1.0F;
+ stop = 16;
+ }
+ else {
+ /* sample point is inside first and second edges */
+ cross = (dx2 * (sy - v2[1]) - dy2 * (sx - v2[0]));
+ if (cross == 0.0F)
+ cross = dx2 + dy2;
+ if (cross < 0.0F) {
+ /* sample point is outside third edge */
+ insideCount -= 1.0F;
+ stop = 16;
+ }
+ }
+ }
+ }
+ if (stop == 4)
+ return 1.0F;
+ else
+ return insideCount * (1.0F / 16.0F);
+}
+
+
+
+static void
+rgba_aa_tri(struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#include "s_aatritemp.h"
+}
+
+
+static void
+general_aa_tri(struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_ATTRIBS
+#include "s_aatritemp.h"
+}
+
+
+
+/*
+ * Examine GL state and set swrast->Triangle to an
+ * appropriate antialiased triangle rasterizer function.
+ */
+void
+_swrast_set_aa_triangle_function(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ ASSERT(ctx->Polygon.SmoothFlag);
+
+ if (ctx->Texture._EnabledCoordUnits != 0
+ || ctx->FragmentProgram._Current
+ || swrast->_FogEnabled
+ || NEED_SECONDARY_COLOR(ctx)) {
+ SWRAST_CONTEXT(ctx)->Triangle = general_aa_tri;
+ }
+ else {
+ SWRAST_CONTEXT(ctx)->Triangle = rgba_aa_tri;
+ }
+
+ ASSERT(SWRAST_CONTEXT(ctx)->Triangle);
+}
diff --git a/mesalib/src/mesa/swrast/s_aatriangle.h b/mesalib/src/mesa/swrast/s_aatriangle.h index 9aed41a19..dec637920 100644 --- a/mesalib/src/mesa/swrast/s_aatriangle.h +++ b/mesalib/src/mesa/swrast/s_aatriangle.h @@ -1,38 +1,38 @@ - -/* - * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_AATRIANGLE_H -#define S_AATRIANGLE_H - - -#include "main/mtypes.h" - - -extern void -_swrast_set_aa_triangle_function(GLcontext *ctx); - - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_AATRIANGLE_H
+#define S_AATRIANGLE_H
+
+
+struct gl_context;
+
+
+extern void
+_swrast_set_aa_triangle_function(struct gl_context *ctx);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_aatritemp.h b/mesalib/src/mesa/swrast/s_aatritemp.h index 5c1c6d904..4136df3a7 100644 --- a/mesalib/src/mesa/swrast/s_aatritemp.h +++ b/mesalib/src/mesa/swrast/s_aatritemp.h @@ -1,331 +1,331 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Antialiased Triangle Rasterizer Template - * - * This file is #include'd to generate custom AA triangle rasterizers. - * NOTE: this code hasn't been optimized yet. That'll come after it - * works correctly. - * - * The following macros may be defined to indicate what auxillary information - * must be copmuted across the triangle: - * DO_Z - if defined, compute Z values - * DO_ATTRIBS - if defined, compute texcoords, varying, etc. - */ - -/*void triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/ -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLfloat *p0 = v0->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *p1 = v1->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *p2 = v2->attrib[FRAG_ATTRIB_WPOS]; - const SWvertex *vMin, *vMid, *vMax; - GLint iyMin, iyMax; - GLfloat yMin, yMax; - GLboolean ltor; - GLfloat majDx, majDy; /* major (i.e. long) edge dx and dy */ - - SWspan span; - -#ifdef DO_Z - GLfloat zPlane[4]; -#endif - GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4]; -#if defined(DO_ATTRIBS) - GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4]; - GLfloat wPlane[4]; /* win[3] */ -#endif - GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceCullSign; - - (void) swrast; - - INIT_SPAN(span, GL_POLYGON); - span.arrayMask = SPAN_COVERAGE; - - /* determine bottom to top order of vertices */ - { - GLfloat y0 = v0->attrib[FRAG_ATTRIB_WPOS][1]; - GLfloat y1 = v1->attrib[FRAG_ATTRIB_WPOS][1]; - GLfloat y2 = v2->attrib[FRAG_ATTRIB_WPOS][1]; - if (y0 <= y1) { - if (y1 <= y2) { - vMin = v0; vMid = v1; vMax = v2; /* y0<=y1<=y2 */ - } - else if (y2 <= y0) { - vMin = v2; vMid = v0; vMax = v1; /* y2<=y0<=y1 */ - } - else { - vMin = v0; vMid = v2; vMax = v1; bf = -bf; /* y0<=y2<=y1 */ - } - } - else { - if (y0 <= y2) { - vMin = v1; vMid = v0; vMax = v2; bf = -bf; /* y1<=y0<=y2 */ - } - else if (y2 <= y1) { - vMin = v2; vMid = v1; vMax = v0; bf = -bf; /* y2<=y1<=y0 */ - } - else { - vMin = v1; vMid = v2; vMax = v0; /* y1<=y2<=y0 */ - } - } - } - - majDx = vMax->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0]; - majDy = vMax->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1]; - - /* front/back-face determination and cullling */ - { - const GLfloat botDx = vMid->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0]; - const GLfloat botDy = vMid->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1]; - const GLfloat area = majDx * botDy - botDx * majDy; - /* Do backface culling */ - if (area * bf < 0 || area == 0 || IS_INF_OR_NAN(area)) - return; - ltor = (GLboolean) (area < 0.0F); - - span.facing = area * swrast->_BackfaceSign > 0.0F; - } - - /* Plane equation setup: - * We evaluate plane equations at window (x,y) coordinates in order - * to compute color, Z, fog, texcoords, etc. This isn't terribly - * efficient but it's easy and reliable. - */ -#ifdef DO_Z - compute_plane(p0, p1, p2, p0[2], p1[2], p2[2], zPlane); - span.arrayMask |= SPAN_Z; -#endif - if (ctx->Light.ShadeModel == GL_SMOOTH) { - compute_plane(p0, p1, p2, v0->color[RCOMP], v1->color[RCOMP], v2->color[RCOMP], rPlane); - compute_plane(p0, p1, p2, v0->color[GCOMP], v1->color[GCOMP], v2->color[GCOMP], gPlane); - compute_plane(p0, p1, p2, v0->color[BCOMP], v1->color[BCOMP], v2->color[BCOMP], bPlane); - compute_plane(p0, p1, p2, v0->color[ACOMP], v1->color[ACOMP], v2->color[ACOMP], aPlane); - } - else { - constant_plane(v2->color[RCOMP], rPlane); - constant_plane(v2->color[GCOMP], gPlane); - constant_plane(v2->color[BCOMP], bPlane); - constant_plane(v2->color[ACOMP], aPlane); - } - span.arrayMask |= SPAN_RGBA; -#if defined(DO_ATTRIBS) - { - const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat invW1 = v1->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat invW2 = v2->attrib[FRAG_ATTRIB_WPOS][3]; - compute_plane(p0, p1, p2, invW0, invW1, invW2, wPlane); - span.attrStepX[FRAG_ATTRIB_WPOS][3] = plane_dx(wPlane); - span.attrStepY[FRAG_ATTRIB_WPOS][3] = plane_dy(wPlane); - ATTRIB_LOOP_BEGIN - GLuint c; - if (swrast->_InterpMode[attr] == GL_FLAT) { - for (c = 0; c < 4; c++) { - constant_plane(v2->attrib[attr][c] * invW2, attrPlane[attr][c]); - } - } - else { - for (c = 0; c < 4; c++) { - const GLfloat a0 = v0->attrib[attr][c] * invW0; - const GLfloat a1 = v1->attrib[attr][c] * invW1; - const GLfloat a2 = v2->attrib[attr][c] * invW2; - compute_plane(p0, p1, p2, a0, a1, a2, attrPlane[attr][c]); - } - } - for (c = 0; c < 4; c++) { - span.attrStepX[attr][c] = plane_dx(attrPlane[attr][c]); - span.attrStepY[attr][c] = plane_dy(attrPlane[attr][c]); - } - ATTRIB_LOOP_END - } -#endif - - /* Begin bottom-to-top scan over the triangle. - * The long edge will either be on the left or right side of the - * triangle. We always scan from the long edge toward the shorter - * edges, stopping when we find that coverage = 0. If the long edge - * is on the left we scan left-to-right. Else, we scan right-to-left. - */ - yMin = vMin->attrib[FRAG_ATTRIB_WPOS][1]; - yMax = vMax->attrib[FRAG_ATTRIB_WPOS][1]; - iyMin = (GLint) yMin; - iyMax = (GLint) yMax + 1; - - if (ltor) { - /* scan left to right */ - const GLfloat *pMin = vMin->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *pMid = vMid->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *pMax = vMax->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat dxdy = majDx / majDy; - const GLfloat xAdj = dxdy < 0.0F ? -dxdy : 0.0F; - GLfloat x = pMin[0] - (yMin - iyMin) * dxdy; - GLint iy; - for (iy = iyMin; iy < iyMax; iy++, x += dxdy) { - GLint ix, startX = (GLint) (x - xAdj); - GLuint count; - GLfloat coverage = 0.0F; - - /* skip over fragments with zero coverage */ - while (startX < MAX_WIDTH) { - coverage = compute_coveragef(pMin, pMid, pMax, startX, iy); - if (coverage > 0.0F) - break; - startX++; - } - - /* enter interior of triangle */ - ix = startX; - -#if defined(DO_ATTRIBS) - /* compute attributes at left-most fragment */ - span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 0.5F, iy + 0.5F, wPlane); - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - span.attrStart[attr][c] = solve_plane(ix + 0.5F, iy + 0.5F, attrPlane[attr][c]); - } - ATTRIB_LOOP_END -#endif - - count = 0; - while (coverage > 0.0F) { - /* (cx,cy) = center of fragment */ - const GLfloat cx = ix + 0.5F, cy = iy + 0.5F; - SWspanarrays *array = span.array; - array->coverage[count] = coverage; -#ifdef DO_Z - array->z[count] = (GLuint) solve_plane(cx, cy, zPlane); -#endif - array->rgba[count][RCOMP] = solve_plane_chan(cx, cy, rPlane); - array->rgba[count][GCOMP] = solve_plane_chan(cx, cy, gPlane); - array->rgba[count][BCOMP] = solve_plane_chan(cx, cy, bPlane); - array->rgba[count][ACOMP] = solve_plane_chan(cx, cy, aPlane); - ix++; - count++; - coverage = compute_coveragef(pMin, pMid, pMax, ix, iy); - } - - if (ix <= startX) - continue; - - span.x = startX; - span.y = iy; - span.end = (GLuint) ix - (GLuint) startX; - _swrast_write_rgba_span(ctx, &span); - } - } - else { - /* scan right to left */ - const GLfloat *pMin = vMin->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *pMid = vMid->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat *pMax = vMax->attrib[FRAG_ATTRIB_WPOS]; - const GLfloat dxdy = majDx / majDy; - const GLfloat xAdj = dxdy > 0 ? dxdy : 0.0F; - GLfloat x = pMin[0] - (yMin - iyMin) * dxdy; - GLint iy; - for (iy = iyMin; iy < iyMax; iy++, x += dxdy) { - GLint ix, left, startX = (GLint) (x + xAdj); - GLuint count, n; - GLfloat coverage = 0.0F; - - /* make sure we're not past the window edge */ - if (startX >= ctx->DrawBuffer->_Xmax) { - startX = ctx->DrawBuffer->_Xmax - 1; - } - - /* skip fragments with zero coverage */ - while (startX > 0) { - coverage = compute_coveragef(pMin, pMax, pMid, startX, iy); - if (coverage > 0.0F) - break; - startX--; - } - - /* enter interior of triangle */ - ix = startX; - count = 0; - while (coverage > 0.0F) { - /* (cx,cy) = center of fragment */ - const GLfloat cx = ix + 0.5F, cy = iy + 0.5F; - SWspanarrays *array = span.array; - ASSERT(ix >= 0); - array->coverage[ix] = coverage; -#ifdef DO_Z - array->z[ix] = (GLuint) solve_plane(cx, cy, zPlane); -#endif - array->rgba[ix][RCOMP] = solve_plane_chan(cx, cy, rPlane); - array->rgba[ix][GCOMP] = solve_plane_chan(cx, cy, gPlane); - array->rgba[ix][BCOMP] = solve_plane_chan(cx, cy, bPlane); - array->rgba[ix][ACOMP] = solve_plane_chan(cx, cy, aPlane); - ix--; - count++; - coverage = compute_coveragef(pMin, pMax, pMid, ix, iy); - } - -#if defined(DO_ATTRIBS) - /* compute attributes at left-most fragment */ - span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 1.5F, iy + 0.5F, wPlane); - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - span.attrStart[attr][c] = solve_plane(ix + 1.5F, iy + 0.5F, attrPlane[attr][c]); - } - ATTRIB_LOOP_END -#endif - - if (startX <= ix) - continue; - - n = (GLuint) startX - (GLuint) ix; - - left = ix + 1; - - /* shift all values to the left */ - /* XXX this is temporary */ - { - SWspanarrays *array = span.array; - GLint j; - for (j = 0; j < (GLint) n; j++) { - array->coverage[j] = array->coverage[j + left]; - COPY_CHAN4(array->rgba[j], array->rgba[j + left]); -#ifdef DO_Z - array->z[j] = array->z[j + left]; -#endif - } - } - - span.x = left; - span.y = iy; - span.end = n; - _swrast_write_rgba_span(ctx, &span); - } - } -} - - -#undef DO_Z -#undef DO_ATTRIBS -#undef DO_OCCLUSION_TEST +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Antialiased Triangle Rasterizer Template
+ *
+ * This file is #include'd to generate custom AA triangle rasterizers.
+ * NOTE: this code hasn't been optimized yet. That'll come after it
+ * works correctly.
+ *
+ * The following macros may be defined to indicate what auxillary information
+ * must be copmuted across the triangle:
+ * DO_Z - if defined, compute Z values
+ * DO_ATTRIBS - if defined, compute texcoords, varying, etc.
+ */
+
+/*void triangle( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLfloat *p0 = v0->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *p1 = v1->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *p2 = v2->attrib[FRAG_ATTRIB_WPOS];
+ const SWvertex *vMin, *vMid, *vMax;
+ GLint iyMin, iyMax;
+ GLfloat yMin, yMax;
+ GLboolean ltor;
+ GLfloat majDx, majDy; /* major (i.e. long) edge dx and dy */
+
+ SWspan span;
+
+#ifdef DO_Z
+ GLfloat zPlane[4];
+#endif
+ GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
+#if defined(DO_ATTRIBS)
+ GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4];
+ GLfloat wPlane[4]; /* win[3] */
+#endif
+ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceCullSign;
+
+ (void) swrast;
+
+ INIT_SPAN(span, GL_POLYGON);
+ span.arrayMask = SPAN_COVERAGE;
+
+ /* determine bottom to top order of vertices */
+ {
+ GLfloat y0 = v0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat y1 = v1->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat y2 = v2->attrib[FRAG_ATTRIB_WPOS][1];
+ if (y0 <= y1) {
+ if (y1 <= y2) {
+ vMin = v0; vMid = v1; vMax = v2; /* y0<=y1<=y2 */
+ }
+ else if (y2 <= y0) {
+ vMin = v2; vMid = v0; vMax = v1; /* y2<=y0<=y1 */
+ }
+ else {
+ vMin = v0; vMid = v2; vMax = v1; bf = -bf; /* y0<=y2<=y1 */
+ }
+ }
+ else {
+ if (y0 <= y2) {
+ vMin = v1; vMid = v0; vMax = v2; bf = -bf; /* y1<=y0<=y2 */
+ }
+ else if (y2 <= y1) {
+ vMin = v2; vMid = v1; vMax = v0; bf = -bf; /* y2<=y1<=y0 */
+ }
+ else {
+ vMin = v1; vMid = v2; vMax = v0; /* y1<=y2<=y0 */
+ }
+ }
+ }
+
+ majDx = vMax->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0];
+ majDy = vMax->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1];
+
+ /* front/back-face determination and cullling */
+ {
+ const GLfloat botDx = vMid->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0];
+ const GLfloat botDy = vMid->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1];
+ const GLfloat area = majDx * botDy - botDx * majDy;
+ /* Do backface culling */
+ if (area * bf < 0 || area == 0 || IS_INF_OR_NAN(area))
+ return;
+ ltor = (GLboolean) (area < 0.0F);
+
+ span.facing = area * swrast->_BackfaceSign > 0.0F;
+ }
+
+ /* Plane equation setup:
+ * We evaluate plane equations at window (x,y) coordinates in order
+ * to compute color, Z, fog, texcoords, etc. This isn't terribly
+ * efficient but it's easy and reliable.
+ */
+#ifdef DO_Z
+ compute_plane(p0, p1, p2, p0[2], p1[2], p2[2], zPlane);
+ span.arrayMask |= SPAN_Z;
+#endif
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(p0, p1, p2, v0->color[RCOMP], v1->color[RCOMP], v2->color[RCOMP], rPlane);
+ compute_plane(p0, p1, p2, v0->color[GCOMP], v1->color[GCOMP], v2->color[GCOMP], gPlane);
+ compute_plane(p0, p1, p2, v0->color[BCOMP], v1->color[BCOMP], v2->color[BCOMP], bPlane);
+ compute_plane(p0, p1, p2, v0->color[ACOMP], v1->color[ACOMP], v2->color[ACOMP], aPlane);
+ }
+ else {
+ constant_plane(v2->color[RCOMP], rPlane);
+ constant_plane(v2->color[GCOMP], gPlane);
+ constant_plane(v2->color[BCOMP], bPlane);
+ constant_plane(v2->color[ACOMP], aPlane);
+ }
+ span.arrayMask |= SPAN_RGBA;
+#if defined(DO_ATTRIBS)
+ {
+ const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat invW1 = v1->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat invW2 = v2->attrib[FRAG_ATTRIB_WPOS][3];
+ compute_plane(p0, p1, p2, invW0, invW1, invW2, wPlane);
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = plane_dx(wPlane);
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = plane_dy(wPlane);
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ for (c = 0; c < 4; c++) {
+ constant_plane(v2->attrib[attr][c] * invW2, attrPlane[attr][c]);
+ }
+ }
+ else {
+ for (c = 0; c < 4; c++) {
+ const GLfloat a0 = v0->attrib[attr][c] * invW0;
+ const GLfloat a1 = v1->attrib[attr][c] * invW1;
+ const GLfloat a2 = v2->attrib[attr][c] * invW2;
+ compute_plane(p0, p1, p2, a0, a1, a2, attrPlane[attr][c]);
+ }
+ }
+ for (c = 0; c < 4; c++) {
+ span.attrStepX[attr][c] = plane_dx(attrPlane[attr][c]);
+ span.attrStepY[attr][c] = plane_dy(attrPlane[attr][c]);
+ }
+ ATTRIB_LOOP_END
+ }
+#endif
+
+ /* Begin bottom-to-top scan over the triangle.
+ * The long edge will either be on the left or right side of the
+ * triangle. We always scan from the long edge toward the shorter
+ * edges, stopping when we find that coverage = 0. If the long edge
+ * is on the left we scan left-to-right. Else, we scan right-to-left.
+ */
+ yMin = vMin->attrib[FRAG_ATTRIB_WPOS][1];
+ yMax = vMax->attrib[FRAG_ATTRIB_WPOS][1];
+ iyMin = (GLint) yMin;
+ iyMax = (GLint) yMax + 1;
+
+ if (ltor) {
+ /* scan left to right */
+ const GLfloat *pMin = vMin->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *pMid = vMid->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *pMax = vMax->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat dxdy = majDx / majDy;
+ const GLfloat xAdj = dxdy < 0.0F ? -dxdy : 0.0F;
+ GLfloat x = pMin[0] - (yMin - iyMin) * dxdy;
+ GLint iy;
+ for (iy = iyMin; iy < iyMax; iy++, x += dxdy) {
+ GLint ix, startX = (GLint) (x - xAdj);
+ GLuint count;
+ GLfloat coverage = 0.0F;
+
+ /* skip over fragments with zero coverage */
+ while (startX < MAX_WIDTH) {
+ coverage = compute_coveragef(pMin, pMid, pMax, startX, iy);
+ if (coverage > 0.0F)
+ break;
+ startX++;
+ }
+
+ /* enter interior of triangle */
+ ix = startX;
+
+#if defined(DO_ATTRIBS)
+ /* compute attributes at left-most fragment */
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 0.5F, iy + 0.5F, wPlane);
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ span.attrStart[attr][c] = solve_plane(ix + 0.5F, iy + 0.5F, attrPlane[attr][c]);
+ }
+ ATTRIB_LOOP_END
+#endif
+
+ count = 0;
+ while (coverage > 0.0F) {
+ /* (cx,cy) = center of fragment */
+ const GLfloat cx = ix + 0.5F, cy = iy + 0.5F;
+ SWspanarrays *array = span.array;
+ array->coverage[count] = coverage;
+#ifdef DO_Z
+ array->z[count] = (GLuint) solve_plane(cx, cy, zPlane);
+#endif
+ array->rgba[count][RCOMP] = solve_plane_chan(cx, cy, rPlane);
+ array->rgba[count][GCOMP] = solve_plane_chan(cx, cy, gPlane);
+ array->rgba[count][BCOMP] = solve_plane_chan(cx, cy, bPlane);
+ array->rgba[count][ACOMP] = solve_plane_chan(cx, cy, aPlane);
+ ix++;
+ count++;
+ coverage = compute_coveragef(pMin, pMid, pMax, ix, iy);
+ }
+
+ if (ix <= startX)
+ continue;
+
+ span.x = startX;
+ span.y = iy;
+ span.end = (GLuint) ix - (GLuint) startX;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else {
+ /* scan right to left */
+ const GLfloat *pMin = vMin->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *pMid = vMid->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat *pMax = vMax->attrib[FRAG_ATTRIB_WPOS];
+ const GLfloat dxdy = majDx / majDy;
+ const GLfloat xAdj = dxdy > 0 ? dxdy : 0.0F;
+ GLfloat x = pMin[0] - (yMin - iyMin) * dxdy;
+ GLint iy;
+ for (iy = iyMin; iy < iyMax; iy++, x += dxdy) {
+ GLint ix, left, startX = (GLint) (x + xAdj);
+ GLuint count, n;
+ GLfloat coverage = 0.0F;
+
+ /* make sure we're not past the window edge */
+ if (startX >= ctx->DrawBuffer->_Xmax) {
+ startX = ctx->DrawBuffer->_Xmax - 1;
+ }
+
+ /* skip fragments with zero coverage */
+ while (startX > 0) {
+ coverage = compute_coveragef(pMin, pMax, pMid, startX, iy);
+ if (coverage > 0.0F)
+ break;
+ startX--;
+ }
+
+ /* enter interior of triangle */
+ ix = startX;
+ count = 0;
+ while (coverage > 0.0F) {
+ /* (cx,cy) = center of fragment */
+ const GLfloat cx = ix + 0.5F, cy = iy + 0.5F;
+ SWspanarrays *array = span.array;
+ ASSERT(ix >= 0);
+ array->coverage[ix] = coverage;
+#ifdef DO_Z
+ array->z[ix] = (GLuint) solve_plane(cx, cy, zPlane);
+#endif
+ array->rgba[ix][RCOMP] = solve_plane_chan(cx, cy, rPlane);
+ array->rgba[ix][GCOMP] = solve_plane_chan(cx, cy, gPlane);
+ array->rgba[ix][BCOMP] = solve_plane_chan(cx, cy, bPlane);
+ array->rgba[ix][ACOMP] = solve_plane_chan(cx, cy, aPlane);
+ ix--;
+ count++;
+ coverage = compute_coveragef(pMin, pMax, pMid, ix, iy);
+ }
+
+#if defined(DO_ATTRIBS)
+ /* compute attributes at left-most fragment */
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 1.5F, iy + 0.5F, wPlane);
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ span.attrStart[attr][c] = solve_plane(ix + 1.5F, iy + 0.5F, attrPlane[attr][c]);
+ }
+ ATTRIB_LOOP_END
+#endif
+
+ if (startX <= ix)
+ continue;
+
+ n = (GLuint) startX - (GLuint) ix;
+
+ left = ix + 1;
+
+ /* shift all values to the left */
+ /* XXX this is temporary */
+ {
+ SWspanarrays *array = span.array;
+ GLint j;
+ for (j = 0; j < (GLint) n; j++) {
+ array->coverage[j] = array->coverage[j + left];
+ COPY_CHAN4(array->rgba[j], array->rgba[j + left]);
+#ifdef DO_Z
+ array->z[j] = array->z[j + left];
+#endif
+ }
+ }
+
+ span.x = left;
+ span.y = iy;
+ span.end = n;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+}
+
+
+#undef DO_Z
+#undef DO_ATTRIBS
+#undef DO_OCCLUSION_TEST
diff --git a/mesalib/src/mesa/swrast/s_accum.c b/mesalib/src/mesa/swrast/s_accum.c index 854e106b7..560a1d143 100644 --- a/mesalib/src/mesa/swrast/s_accum.c +++ b/mesalib/src/mesa/swrast/s_accum.c @@ -1,594 +1,594 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/macros.h" -#include "main/imports.h" - -#include "s_accum.h" -#include "s_context.h" -#include "s_masking.h" -#include "s_span.h" - - -/* XXX this would have to change for accum buffers with more or less - * than 16 bits per color channel. - */ -#define ACCUM_SCALE16 32767.0F - - -/* - * Accumulation buffer notes - * - * Normally, accumulation buffer values are GLshorts with values in - * [-32767, 32767] which represent floating point colors in [-1, 1], - * as defined by the OpenGL specification. - * - * We optimize for the common case used for full-scene antialiasing: - * // start with accum buffer cleared to zero - * glAccum(GL_LOAD, w); // or GL_ACCUM the first image - * glAccum(GL_ACCUM, w); - * ... - * glAccum(GL_ACCUM, w); - * glAccum(GL_RETURN, 1.0); - * That is, we start with an empty accumulation buffer and accumulate - * n images, each with weight w = 1/n. - * In this scenario, we can simply store unscaled integer values in - * the accum buffer instead of scaled integers. We'll also keep track - * of the w value so when we do GL_RETURN we simply divide the accumulated - * values by n (n=1/w). - * This lets us avoid _many_ int->float->int conversions. - */ - - -#if CHAN_BITS == 8 -/* enable the optimization */ -#define USE_OPTIMIZED_ACCUM 1 -#else -#define USE_OPTIMIZED_ACCUM 0 -#endif - - -/** - * This is called when we fall out of optimized/unscaled accum buffer mode. - * That is, we convert each unscaled accum buffer value into a scaled value - * representing the range[-1, 1]. - */ -static void -rescale_accum( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_renderbuffer *rb - = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; - const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF); - - assert(rb); - assert(rb->_BaseFormat == GL_RGBA); - /* add other types in future? */ - assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT); - assert(swrast->_IntegerAccumMode); - - if (rb->GetPointer(ctx, rb, 0, 0)) { - /* directly-addressable memory */ - GLuint y; - for (y = 0; y < rb->Height; y++) { - GLuint i; - GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y); - for (i = 0; i < 4 * rb->Width; i++) { - acc[i] = (GLshort) (acc[i] * s); - } - } - } - else { - /* use get/put row funcs */ - GLuint y; - for (y = 0; y < rb->Height; y++) { - GLshort accRow[MAX_WIDTH * 4]; - GLuint i; - rb->GetRow(ctx, rb, rb->Width, 0, y, accRow); - for (i = 0; i < 4 * rb->Width; i++) { - accRow[i] = (GLshort) (accRow[i] * s); - } - rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL); - } - } - - swrast->_IntegerAccumMode = GL_FALSE; -} - - - -/** - * Clear the accumulation Buffer. - */ -void -_swrast_clear_accum_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint x, y, width, height; - - /* No accumulation buffer! Not an error. */ - if (!rb || !rb->Data) - return; - - assert(rb->_BaseFormat == GL_RGBA); - /* add other types in future? */ - assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT); - - /* bounds, with scissor */ - x = ctx->DrawBuffer->_Xmin; - y = ctx->DrawBuffer->_Ymin; - width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - - if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) { - const GLfloat accScale = 32767.0; - GLshort clearVal[4]; - GLuint i; - - clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale); - clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale); - clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale); - clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale); - - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL); - } - } - else { - /* someday support other sizes */ - } - - /* update optimized accum state vars */ - if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 && - ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) { -#if USE_OPTIMIZED_ACCUM - swrast->_IntegerAccumMode = GL_TRUE; -#else - swrast->_IntegerAccumMode = GL_FALSE; -#endif - swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */ - } - else { - swrast->_IntegerAccumMode = GL_FALSE; - } -} - - -static void -accum_add(GLcontext *ctx, GLfloat value, - GLint xpos, GLint ypos, GLint width, GLint height ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_renderbuffer *rb - = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; - - assert(rb); - - /* Leave optimized accum buffer mode */ - if (swrast->_IntegerAccumMode) - rescale_accum(ctx); - - if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) { - const GLshort incr = (GLshort) (value * ACCUM_SCALE16); - if (rb->GetPointer(ctx, rb, 0, 0)) { - GLint i, j; - for (i = 0; i < height; i++) { - GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i); - for (j = 0; j < 4 * width; j++) { - acc[j] += incr; - } - } - } - else { - GLint i, j; - for (i = 0; i < height; i++) { - GLshort accRow[4 * MAX_WIDTH]; - rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow); - for (j = 0; j < 4 * width; j++) { - accRow[j] += incr; - } - rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL); - } - } - } - else { - /* other types someday */ - } -} - - -static void -accum_mult(GLcontext *ctx, GLfloat mult, - GLint xpos, GLint ypos, GLint width, GLint height ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_renderbuffer *rb - = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; - - assert(rb); - - /* Leave optimized accum buffer mode */ - if (swrast->_IntegerAccumMode) - rescale_accum(ctx); - - if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) { - if (rb->GetPointer(ctx, rb, 0, 0)) { - GLint i, j; - for (i = 0; i < height; i++) { - GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i); - for (j = 0; j < 4 * width; j++) { - acc[j] = (GLshort) (acc[j] * mult); - } - } - } - else { - GLint i, j; - for (i = 0; i < height; i++) { - GLshort accRow[4 * MAX_WIDTH]; - rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow); - for (j = 0; j < 4 * width; j++) { - accRow[j] = (GLshort) (accRow[j] * mult); - } - rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL); - } - } - } - else { - /* other types someday */ - } -} - - - -static void -accum_accum(GLcontext *ctx, GLfloat value, - GLint xpos, GLint ypos, GLint width, GLint height ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_renderbuffer *rb - = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; - const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL); - - assert(rb); - - if (!ctx->ReadBuffer->_ColorReadBuffer) { - /* no read buffer - OK */ - return; - } - - /* May have to leave optimized accum buffer mode */ - if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0) - swrast->_IntegerAccumScaler = value; - if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler) - rescale_accum(ctx); - - if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) { - const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF; - GLshort accumRow[4 * MAX_WIDTH]; - GLchan rgba[MAX_WIDTH][4]; - GLint i; - - for (i = 0; i < height; i++) { - GLshort *acc; - if (directAccess) { - acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i); - } - else { - rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow); - acc = accumRow; - } - - /* read colors from color buffer */ - _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width, - xpos, ypos + i, CHAN_TYPE, rgba); - - /* do accumulation */ - if (swrast->_IntegerAccumMode) { - /* simply add integer color values into accum buffer */ - GLint j; - for (j = 0; j < width; j++) { - acc[j * 4 + 0] += rgba[j][RCOMP]; - acc[j * 4 + 1] += rgba[j][GCOMP]; - acc[j * 4 + 2] += rgba[j][BCOMP]; - acc[j * 4 + 3] += rgba[j][ACOMP]; - } - } - else { - /* scaled integer (or float) accum buffer */ - GLint j; - for (j = 0; j < width; j++) { - acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale); - acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale); - acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale); - acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale); - } - } - - if (!directAccess) { - rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL); - } - } - } - else { - /* other types someday */ - } -} - - - -static void -accum_load(GLcontext *ctx, GLfloat value, - GLint xpos, GLint ypos, GLint width, GLint height ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_renderbuffer *rb - = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; - const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL); - - assert(rb); - - if (!ctx->ReadBuffer->_ColorReadBuffer) { - /* no read buffer - OK */ - return; - } - - /* This is a change to go into optimized accum buffer mode */ - if (value > 0.0 && value <= 1.0) { -#if USE_OPTIMIZED_ACCUM - swrast->_IntegerAccumMode = GL_TRUE; -#else - swrast->_IntegerAccumMode = GL_FALSE; -#endif - swrast->_IntegerAccumScaler = value; - } - else { - swrast->_IntegerAccumMode = GL_FALSE; - swrast->_IntegerAccumScaler = 0.0; - } - - if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) { - const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF; - GLshort accumRow[4 * MAX_WIDTH]; - GLchan rgba[MAX_WIDTH][4]; - GLint i; - - for (i = 0; i < height; i++) { - GLshort *acc; - if (directAccess) { - acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i); - } - else { - rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow); - acc = accumRow; - } - - /* read colors from color buffer */ - _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width, - xpos, ypos + i, CHAN_TYPE, rgba); - - /* do load */ - if (swrast->_IntegerAccumMode) { - /* just copy values in */ - GLint j; - assert(swrast->_IntegerAccumScaler > 0.0); - assert(swrast->_IntegerAccumScaler <= 1.0); - for (j = 0; j < width; j++) { - acc[j * 4 + 0] = rgba[j][RCOMP]; - acc[j * 4 + 1] = rgba[j][GCOMP]; - acc[j * 4 + 2] = rgba[j][BCOMP]; - acc[j * 4 + 3] = rgba[j][ACOMP]; - } - } - else { - /* scaled integer (or float) accum buffer */ - GLint j; - for (j = 0; j < width; j++) { - acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale); - acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale); - acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale); - acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale); - } - } - - if (!directAccess) { - rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL); - } - } - } -} - - -static void -accum_return(GLcontext *ctx, GLfloat value, - GLint xpos, GLint ypos, GLint width, GLint height ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer; - const GLboolean directAccess - = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL); - - static GLchan multTable[32768]; - static GLfloat prevMult = 0.0; - const GLfloat mult = swrast->_IntegerAccumScaler; - const GLint max = MIN2((GLint) (256 / mult), 32767); - - /* May have to leave optimized accum buffer mode */ - if (swrast->_IntegerAccumMode && value != 1.0) - rescale_accum(ctx); - - if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) { - /* build lookup table to avoid many floating point multiplies */ - GLint j; - assert(swrast->_IntegerAccumScaler <= 1.0); - if (mult != prevMult) { - for (j = 0; j < max; j++) - multTable[j] = IROUND((GLfloat) j * mult); - prevMult = mult; - } - } - - if (accumRb->DataType == GL_SHORT || - accumRb->DataType == GL_UNSIGNED_SHORT) { - const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16; - GLuint buffer; - GLint i; - - /* XXX maybe transpose the 'i' and 'buffer' loops??? */ - for (i = 0; i < height; i++) { - GLshort accumRow[4 * MAX_WIDTH]; - GLshort *acc; - SWspan span; - - /* init color span */ - INIT_SPAN(span, GL_BITMAP); - span.end = width; - span.arrayMask = SPAN_RGBA; - span.x = xpos; - span.y = ypos + i; - - if (directAccess) { - acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i); - } - else { - accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow); - acc = accumRow; - } - - /* get the colors to return */ - if (swrast->_IntegerAccumMode) { - GLint j; - for (j = 0; j < width; j++) { - ASSERT(acc[j * 4 + 0] < max); - ASSERT(acc[j * 4 + 1] < max); - ASSERT(acc[j * 4 + 2] < max); - ASSERT(acc[j * 4 + 3] < max); - span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]]; - span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]]; - span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]]; - span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]]; - } - } - else { - /* scaled integer (or float) accum buffer */ - GLint j; - for (j = 0; j < width; j++) { -#if CHAN_BITS==32 - GLchan r = acc[j * 4 + 0] * scale; - GLchan g = acc[j * 4 + 1] * scale; - GLchan b = acc[j * 4 + 2] * scale; - GLchan a = acc[j * 4 + 3] * scale; -#else - GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale ); - GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale ); - GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale ); - GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale ); -#endif - span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX ); - span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX ); - span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX ); - span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX ); - } - } - - /* store colors */ - for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) { - struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer]; - const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] || - !ctx->Color.ColorMask[buffer][GCOMP] || - !ctx->Color.ColorMask[buffer][BCOMP] || - !ctx->Color.ColorMask[buffer][ACOMP]); - if (masking) { - _swrast_mask_rgba_span(ctx, rb, &span, buffer); - } - rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL); - } - } - } - else { - /* other types someday */ - } -} - - - -/** - * Software fallback for glAccum. - */ -void -_swrast_Accum(GLcontext *ctx, GLenum op, GLfloat value) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLint xpos, ypos, width, height; - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) { - _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer"); - return; - } - - swrast_render_start(ctx); - - /* Compute region after calling swrast_render_start() so that we know the - * drawbuffer's size/bounds are up to date. - */ - xpos = ctx->DrawBuffer->_Xmin; - ypos = ctx->DrawBuffer->_Ymin; - width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - - switch (op) { - case GL_ADD: - if (value != 0.0F) { - accum_add(ctx, value, xpos, ypos, width, height); - } - break; - case GL_MULT: - if (value != 1.0F) { - accum_mult(ctx, value, xpos, ypos, width, height); - } - break; - case GL_ACCUM: - if (value != 0.0F) { - accum_accum(ctx, value, xpos, ypos, width, height); - } - break; - case GL_LOAD: - accum_load(ctx, value, xpos, ypos, width, height); - break; - case GL_RETURN: - accum_return(ctx, value, xpos, ypos, width, height); - break; - default: - _mesa_problem(ctx, "invalid mode in _swrast_Accum()"); - break; - } - - swrast_render_finish(ctx); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+
+#include "s_accum.h"
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+/* XXX this would have to change for accum buffers with more or less
+ * than 16 bits per color channel.
+ */
+#define ACCUM_SCALE16 32767.0F
+
+
+/*
+ * Accumulation buffer notes
+ *
+ * Normally, accumulation buffer values are GLshorts with values in
+ * [-32767, 32767] which represent floating point colors in [-1, 1],
+ * as defined by the OpenGL specification.
+ *
+ * We optimize for the common case used for full-scene antialiasing:
+ * // start with accum buffer cleared to zero
+ * glAccum(GL_LOAD, w); // or GL_ACCUM the first image
+ * glAccum(GL_ACCUM, w);
+ * ...
+ * glAccum(GL_ACCUM, w);
+ * glAccum(GL_RETURN, 1.0);
+ * That is, we start with an empty accumulation buffer and accumulate
+ * n images, each with weight w = 1/n.
+ * In this scenario, we can simply store unscaled integer values in
+ * the accum buffer instead of scaled integers. We'll also keep track
+ * of the w value so when we do GL_RETURN we simply divide the accumulated
+ * values by n (n=1/w).
+ * This lets us avoid _many_ int->float->int conversions.
+ */
+
+
+#if CHAN_BITS == 8
+/* enable the optimization */
+#define USE_OPTIMIZED_ACCUM 1
+#else
+#define USE_OPTIMIZED_ACCUM 0
+#endif
+
+
+/**
+ * This is called when we fall out of optimized/unscaled accum buffer mode.
+ * That is, we convert each unscaled accum buffer value into a scaled value
+ * representing the range[-1, 1].
+ */
+static void
+rescale_accum( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);
+
+ assert(rb);
+ assert(rb->_BaseFormat == GL_RGBA);
+ /* add other types in future? */
+ assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+ assert(swrast->_IntegerAccumMode);
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* directly-addressable memory */
+ GLuint y;
+ for (y = 0; y < rb->Height; y++) {
+ GLuint i;
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);
+ for (i = 0; i < 4 * rb->Width; i++) {
+ acc[i] = (GLshort) (acc[i] * s);
+ }
+ }
+ }
+ else {
+ /* use get/put row funcs */
+ GLuint y;
+ for (y = 0; y < rb->Height; y++) {
+ GLshort accRow[MAX_WIDTH * 4];
+ GLuint i;
+ rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);
+ for (i = 0; i < 4 * rb->Width; i++) {
+ accRow[i] = (GLshort) (accRow[i] * s);
+ }
+ rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);
+ }
+ }
+
+ swrast->_IntegerAccumMode = GL_FALSE;
+}
+
+
+
+/**
+ * Clear the accumulation Buffer.
+ */
+void
+_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint x, y, width, height;
+
+ /* No accumulation buffer! Not an error. */
+ if (!rb || !rb->Data)
+ return;
+
+ assert(rb->_BaseFormat == GL_RGBA);
+ /* add other types in future? */
+ assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+
+ /* bounds, with scissor */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat accScale = 32767.0;
+ GLshort clearVal[4];
+ GLuint i;
+
+ clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);
+ clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);
+ clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);
+ clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);
+
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+ }
+ }
+ else {
+ /* someday support other sizes */
+ }
+
+ /* update optimized accum state vars */
+ if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
+ ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
+#if USE_OPTIMIZED_ACCUM
+ swrast->_IntegerAccumMode = GL_TRUE;
+#else
+ swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+ swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
+ }
+ else {
+ swrast->_IntegerAccumMode = GL_FALSE;
+ }
+}
+
+
+static void
+accum_add(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+ assert(rb);
+
+ /* Leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLshort incr = (GLshort) (value * ACCUM_SCALE16);
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ for (j = 0; j < 4 * width; j++) {
+ acc[j] += incr;
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort accRow[4 * MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+ for (j = 0; j < 4 * width; j++) {
+ accRow[j] += incr;
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+static void
+accum_mult(struct gl_context *ctx, GLfloat mult,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+ assert(rb);
+
+ /* Leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ for (j = 0; j < 4 * width; j++) {
+ acc[j] = (GLshort) (acc[j] * mult);
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort accRow[4 * MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+ for (j = 0; j < 4 * width; j++) {
+ accRow[j] = (GLshort) (accRow[j] * mult);
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+static void
+accum_accum(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+ assert(rb);
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no read buffer - OK */
+ return;
+ }
+
+ /* May have to leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
+ swrast->_IntegerAccumScaler = value;
+ if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLchan rgba[MAX_WIDTH][4];
+ GLint i;
+
+ for (i = 0; i < height; i++) {
+ GLshort *acc;
+ if (directAccess) {
+ acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ }
+ else {
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* read colors from color buffer */
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+ xpos, ypos + i, CHAN_TYPE, rgba);
+
+ /* do accumulation */
+ if (swrast->_IntegerAccumMode) {
+ /* simply add integer color values into accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] += rgba[j][RCOMP];
+ acc[j * 4 + 1] += rgba[j][GCOMP];
+ acc[j * 4 + 2] += rgba[j][BCOMP];
+ acc[j * 4 + 3] += rgba[j][ACOMP];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+ acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+ acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+ acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+ }
+ }
+
+ if (!directAccess) {
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+static void
+accum_load(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+ assert(rb);
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no read buffer - OK */
+ return;
+ }
+
+ /* This is a change to go into optimized accum buffer mode */
+ if (value > 0.0 && value <= 1.0) {
+#if USE_OPTIMIZED_ACCUM
+ swrast->_IntegerAccumMode = GL_TRUE;
+#else
+ swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+ swrast->_IntegerAccumScaler = value;
+ }
+ else {
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
+ }
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLchan rgba[MAX_WIDTH][4];
+ GLint i;
+
+ for (i = 0; i < height; i++) {
+ GLshort *acc;
+ if (directAccess) {
+ acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ }
+ else {
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* read colors from color buffer */
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+ xpos, ypos + i, CHAN_TYPE, rgba);
+
+ /* do load */
+ if (swrast->_IntegerAccumMode) {
+ /* just copy values in */
+ GLint j;
+ assert(swrast->_IntegerAccumScaler > 0.0);
+ assert(swrast->_IntegerAccumScaler <= 1.0);
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] = rgba[j][RCOMP];
+ acc[j * 4 + 1] = rgba[j][GCOMP];
+ acc[j * 4 + 2] = rgba[j][BCOMP];
+ acc[j * 4 + 3] = rgba[j][ACOMP];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+ acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+ acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+ acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+ }
+ }
+
+ if (!directAccess) {
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+ }
+ }
+ }
+}
+
+
+static void
+accum_return(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess
+ = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);
+
+ static GLchan multTable[32768];
+ static GLfloat prevMult = 0.0;
+ const GLfloat mult = swrast->_IntegerAccumScaler;
+ const GLint max = MIN2((GLint) (256 / mult), 32767);
+
+ /* May have to leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode && value != 1.0)
+ rescale_accum(ctx);
+
+ if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
+ /* build lookup table to avoid many floating point multiplies */
+ GLint j;
+ assert(swrast->_IntegerAccumScaler <= 1.0);
+ if (mult != prevMult) {
+ for (j = 0; j < max; j++)
+ multTable[j] = IROUND((GLfloat) j * mult);
+ prevMult = mult;
+ }
+ }
+
+ if (accumRb->DataType == GL_SHORT ||
+ accumRb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;
+ GLuint buffer;
+ GLint i;
+
+ /* XXX maybe transpose the 'i' and 'buffer' loops??? */
+ for (i = 0; i < height; i++) {
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLshort *acc;
+ SWspan span;
+
+ /* init color span */
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_RGBA;
+ span.x = xpos;
+ span.y = ypos + i;
+
+ if (directAccess) {
+ acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);
+ }
+ else {
+ accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* get the colors to return */
+ if (swrast->_IntegerAccumMode) {
+ GLint j;
+ for (j = 0; j < width; j++) {
+ ASSERT(acc[j * 4 + 0] < max);
+ ASSERT(acc[j * 4 + 1] < max);
+ ASSERT(acc[j * 4 + 2] < max);
+ ASSERT(acc[j * 4 + 3] < max);
+ span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
+ span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
+ span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
+ span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+#if CHAN_BITS==32
+ GLchan r = acc[j * 4 + 0] * scale;
+ GLchan g = acc[j * 4 + 1] * scale;
+ GLchan b = acc[j * 4 + 2] * scale;
+ GLchan a = acc[j * 4 + 3] * scale;
+#else
+ GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );
+ GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );
+ GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );
+ GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );
+#endif
+ span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
+ span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
+ span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
+ span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
+ }
+ }
+
+ /* store colors */
+ for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
+ const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
+ !ctx->Color.ColorMask[buffer][GCOMP] ||
+ !ctx->Color.ColorMask[buffer][BCOMP] ||
+ !ctx->Color.ColorMask[buffer][ACOMP]);
+ if (masking) {
+ _swrast_mask_rgba_span(ctx, rb, &span, buffer);
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+/**
+ * Software fallback for glAccum.
+ */
+void
+_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint xpos, ypos, width, height;
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
+ return;
+ }
+
+ swrast_render_start(ctx);
+
+ /* Compute region after calling swrast_render_start() so that we know the
+ * drawbuffer's size/bounds are up to date.
+ */
+ xpos = ctx->DrawBuffer->_Xmin;
+ ypos = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ switch (op) {
+ case GL_ADD:
+ if (value != 0.0F) {
+ accum_add(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_MULT:
+ if (value != 1.0F) {
+ accum_mult(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_ACCUM:
+ if (value != 0.0F) {
+ accum_accum(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_LOAD:
+ accum_load(ctx, value, xpos, ypos, width, height);
+ break;
+ case GL_RETURN:
+ accum_return(ctx, value, xpos, ypos, width, height);
+ break;
+ default:
+ _mesa_problem(ctx, "invalid mode in _swrast_Accum()");
+ break;
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_accum.h b/mesalib/src/mesa/swrast/s_accum.h index 42e38cf02..bdd6ac326 100644 --- a/mesalib/src/mesa/swrast/s_accum.h +++ b/mesalib/src/mesa/swrast/s_accum.h @@ -1,37 +1,38 @@ -/* - * Mesa 3-D graphics library - * Version: 6.3 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_ACCUM_H -#define S_ACCUM_H - - -#include "main/mtypes.h" - - -extern void -_swrast_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_ACCUM_H
+#define S_ACCUM_H
+
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+extern void
+_swrast_clear_accum_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_alpha.c b/mesalib/src/mesa/swrast/s_alpha.c index 509477433..798b506e4 100644 --- a/mesalib/src/mesa/swrast/s_alpha.c +++ b/mesalib/src/mesa/swrast/s_alpha.c @@ -1,160 +1,160 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/** - * \file swrast/s_alpha.c - * \brief Functions to apply alpha test. - */ - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/macros.h" - -#include "s_alpha.h" -#include "s_context.h" - - -#define ALPHA_TEST(ALPHA, LOOP_CODE) \ -do { \ - switch (ctx->Color.AlphaFunc) { \ - case GL_LESS: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA < ref); \ - LOOP_CODE; \ - } \ - break; \ - case GL_LEQUAL: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA <= ref); \ - LOOP_CODE; \ - } \ - break; \ - case GL_GEQUAL: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA >= ref); \ - LOOP_CODE; \ - } \ - break; \ - case GL_GREATER: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA > ref); \ - LOOP_CODE; \ - } \ - break; \ - case GL_NOTEQUAL: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA != ref); \ - LOOP_CODE; \ - } \ - break; \ - case GL_EQUAL: \ - for (i = 0; i < n; i++) { \ - mask[i] &= (ALPHA == ref); \ - LOOP_CODE; \ - } \ - break; \ - default: \ - _mesa_problem(ctx, "Invalid alpha test in _swrast_alpha_test" ); \ - return 0; \ - } \ -} while (0) - - - -/** - * Perform the alpha test for an array of pixels. - * For pixels that fail the test, mask[i] will be set to 0. - * \return 0 if all pixels in the span failed the alpha test, - * 1 if one or more pixels passed the alpha test. - */ -GLint -_swrast_alpha_test(const GLcontext *ctx, SWspan *span) -{ - const GLuint n = span->end; - GLubyte *mask = span->array->mask; - GLuint i; - - if (ctx->Color.AlphaFunc == GL_ALWAYS) { - /* do nothing */ - return 1; - } - else if (ctx->Color.AlphaFunc == GL_NEVER) { - /* All pixels failed - caller should check for this return value and - * act accordingly. - */ - span->writeAll = GL_FALSE; - return 0; - } - - if (span->arrayMask & SPAN_RGBA) { - /* Use array's alpha values */ - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - GLubyte ref; - CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef); - ALPHA_TEST(rgba[i][ACOMP], ;); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - GLushort ref; - CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef); - ALPHA_TEST(rgba[i][ACOMP], ;); - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - const GLfloat ref = ctx->Color.AlphaRef; - ALPHA_TEST(rgba[i][ACOMP], ;); - } - } - else { - /* Interpolate alpha values */ - ASSERT(span->interpMask & SPAN_RGBA); - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - const GLfixed alphaStep = span->alphaStep; - GLfixed alpha = span->alpha; - GLubyte ref; - CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef); - ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - const GLfixed alphaStep = span->alphaStep; - GLfixed alpha = span->alpha; - GLushort ref; - CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef); - ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep); - } - else { - const GLfloat alphaStep = FixedToFloat(span->alphaStep); - GLfloat alpha = FixedToFloat(span->alpha); - const GLfloat ref = ctx->Color.AlphaRef; - ALPHA_TEST(alpha, alpha += alphaStep); - } - } - - span->writeAll = GL_FALSE; - - /* XXX examine mask[] values? */ - return 1; -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file swrast/s_alpha.c
+ * \brief Functions to apply alpha test.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_alpha.h"
+#include "s_context.h"
+
+
+#define ALPHA_TEST(ALPHA, LOOP_CODE) \
+do { \
+ switch (ctx->Color.AlphaFunc) { \
+ case GL_LESS: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA < ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_LEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA <= ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_GEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA >= ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_GREATER: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA > ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_NOTEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA != ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_EQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA == ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ default: \
+ _mesa_problem(ctx, "Invalid alpha test in _swrast_alpha_test" ); \
+ return 0; \
+ } \
+} while (0)
+
+
+
+/**
+ * Perform the alpha test for an array of pixels.
+ * For pixels that fail the test, mask[i] will be set to 0.
+ * \return 0 if all pixels in the span failed the alpha test,
+ * 1 if one or more pixels passed the alpha test.
+ */
+GLint
+_swrast_alpha_test(const struct gl_context *ctx, SWspan *span)
+{
+ const GLuint n = span->end;
+ GLubyte *mask = span->array->mask;
+ GLuint i;
+
+ if (ctx->Color.AlphaFunc == GL_ALWAYS) {
+ /* do nothing */
+ return 1;
+ }
+ else if (ctx->Color.AlphaFunc == GL_NEVER) {
+ /* All pixels failed - caller should check for this return value and
+ * act accordingly.
+ */
+ span->writeAll = GL_FALSE;
+ return 0;
+ }
+
+ if (span->arrayMask & SPAN_RGBA) {
+ /* Use array's alpha values */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ GLubyte ref;
+ CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ GLushort ref;
+ CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ const GLfloat ref = ctx->Color.AlphaRef;
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ }
+ else {
+ /* Interpolate alpha values */
+ ASSERT(span->interpMask & SPAN_RGBA);
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ GLubyte ref;
+ CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ GLushort ref;
+ CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
+ }
+ else {
+ const GLfloat alphaStep = FixedToFloat(span->alphaStep);
+ GLfloat alpha = FixedToFloat(span->alpha);
+ const GLfloat ref = ctx->Color.AlphaRef;
+ ALPHA_TEST(alpha, alpha += alphaStep);
+ }
+ }
+
+ span->writeAll = GL_FALSE;
+
+ /* XXX examine mask[] values? */
+ return 1;
+}
diff --git a/mesalib/src/mesa/swrast/s_alpha.h b/mesalib/src/mesa/swrast/s_alpha.h index 239484a97..ac5cd8dab 100644 --- a/mesalib/src/mesa/swrast/s_alpha.h +++ b/mesalib/src/mesa/swrast/s_alpha.h @@ -1,39 +1,39 @@ - -/* - * Mesa 3-D graphics library - * Version: 4.1 - * - * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_ALPHA_H -#define S_ALPHA_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern GLint -_swrast_alpha_test( const GLcontext *ctx, SWspan *span ); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_ALPHA_H
+#define S_ALPHA_H
+
+
+#include "main/glheader.h"
+#include "s_span.h"
+
+struct gl_context;
+
+extern GLint
+_swrast_alpha_test( const struct gl_context *ctx, SWspan *span );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_atifragshader.c b/mesalib/src/mesa/swrast/s_atifragshader.c index 1338b6802..6019eea5e 100644 --- a/mesalib/src/mesa/swrast/s_atifragshader.c +++ b/mesalib/src/mesa/swrast/s_atifragshader.c @@ -1,604 +1,604 @@ -/* - * Copyright (C) 2004 David Airlie All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * DAVID AIRLIE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/macros.h" -#include "main/atifragshader.h" -#include "swrast/s_atifragshader.h" -#include "swrast/s_context.h" - - -/** - * State for executing ATI fragment shader. - */ -struct atifs_machine -{ - GLfloat Registers[6][4]; /** six temporary registers */ - GLfloat PrevPassRegisters[6][4]; - GLfloat Inputs[2][4]; /** Primary, secondary input colors */ -}; - - - -/** - * Fetch a texel. - */ -static void -fetch_texel(GLcontext * ctx, const GLfloat texcoord[4], GLfloat lambda, - GLuint unit, GLfloat color[4]) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - /* XXX use a float-valued TextureSample routine here!!! */ - swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current, - 1, (const GLfloat(*)[4]) texcoord, - &lambda, (GLfloat (*)[4]) color); -} - -static void -apply_swizzle(GLfloat values[4], GLuint swizzle) -{ - GLfloat s, t, r, q; - - s = values[0]; - t = values[1]; - r = values[2]; - q = values[3]; - - switch (swizzle) { - case GL_SWIZZLE_STR_ATI: - values[0] = s; - values[1] = t; - values[2] = r; - break; - case GL_SWIZZLE_STQ_ATI: - values[0] = s; - values[1] = t; - values[2] = q; - break; - case GL_SWIZZLE_STR_DR_ATI: - values[0] = s / r; - values[1] = t / r; - values[2] = 1 / r; - break; - case GL_SWIZZLE_STQ_DQ_ATI: -/* make sure q is not 0 to avoid problems later with infinite values (texture lookup)? */ - if (q == 0.0F) - q = 0.000000001F; - values[0] = s / q; - values[1] = t / q; - values[2] = 1.0F / q; - break; - } - values[3] = 0.0; -} - -static void -apply_src_rep(GLint optype, GLuint rep, GLfloat * val) -{ - GLint i; - GLint start, end; - if (!rep) - return; - - start = optype ? 3 : 0; - end = 4; - - for (i = start; i < end; i++) { - switch (rep) { - case GL_RED: - val[i] = val[0]; - break; - case GL_GREEN: - val[i] = val[1]; - break; - case GL_BLUE: - val[i] = val[2]; - break; - case GL_ALPHA: - val[i] = val[3]; - break; - } - } -} - -static void -apply_src_mod(GLint optype, GLuint mod, GLfloat * val) -{ - GLint i; - GLint start, end; - - if (!mod) - return; - - start = optype ? 3 : 0; - end = 4; - - for (i = start; i < end; i++) { - if (mod & GL_COMP_BIT_ATI) - val[i] = 1 - val[i]; - - if (mod & GL_BIAS_BIT_ATI) - val[i] = val[i] - 0.5F; - - if (mod & GL_2X_BIT_ATI) - val[i] = 2 * val[i]; - - if (mod & GL_NEGATE_BIT_ATI) - val[i] = -val[i]; - } -} - -static void -apply_dst_mod(GLuint optype, GLuint mod, GLfloat * val) -{ - GLint i; - GLint has_sat = mod & GL_SATURATE_BIT_ATI; - GLint start, end; - - mod &= ~GL_SATURATE_BIT_ATI; - - start = optype ? 3 : 0; - end = optype ? 4 : 3; - - for (i = start; i < end; i++) { - switch (mod) { - case GL_2X_BIT_ATI: - val[i] = 2 * val[i]; - break; - case GL_4X_BIT_ATI: - val[i] = 4 * val[i]; - break; - case GL_8X_BIT_ATI: - val[i] = 8 * val[i]; - break; - case GL_HALF_BIT_ATI: - val[i] = val[i] * 0.5F; - break; - case GL_QUARTER_BIT_ATI: - val[i] = val[i] * 0.25F; - break; - case GL_EIGHTH_BIT_ATI: - val[i] = val[i] * 0.125F; - break; - } - - if (has_sat) { - if (val[i] < 0.0F) - val[i] = 0.0F; - else if (val[i] > 1.0F) - val[i] = 1.0F; - } - else { - if (val[i] < -8.0F) - val[i] = -8.0F; - else if (val[i] > 8.0F) - val[i] = 8.0F; - } - } -} - - -static void -write_dst_addr(GLuint optype, GLuint mod, GLuint mask, GLfloat * src, - GLfloat * dst) -{ - GLint i; - apply_dst_mod(optype, mod, src); - - if (optype == ATI_FRAGMENT_SHADER_COLOR_OP) { - if (mask) { - if (mask & GL_RED_BIT_ATI) - dst[0] = src[0]; - - if (mask & GL_GREEN_BIT_ATI) - dst[1] = src[1]; - - if (mask & GL_BLUE_BIT_ATI) - dst[2] = src[2]; - } - else { - for (i = 0; i < 3; i++) - dst[i] = src[i]; - } - } - else - dst[3] = src[3]; -} - -static void -finish_pass(struct atifs_machine *machine) -{ - GLint i; - - for (i = 0; i < 6; i++) { - COPY_4V(machine->PrevPassRegisters[i], machine->Registers[i]); - } -} - -struct ati_fs_opcode_st ati_fs_opcodes[] = { - {GL_ADD_ATI, 2}, - {GL_SUB_ATI, 2}, - {GL_MUL_ATI, 2}, - {GL_MAD_ATI, 3}, - {GL_LERP_ATI, 3}, - {GL_MOV_ATI, 1}, - {GL_CND_ATI, 3}, - {GL_CND0_ATI, 3}, - {GL_DOT2_ADD_ATI, 3}, - {GL_DOT3_ATI, 2}, - {GL_DOT4_ATI, 2} -}; - - - -static void -handle_pass_op(struct atifs_machine *machine, struct atifs_setupinst *texinst, - const SWspan *span, GLuint column, GLuint idx) -{ - GLuint swizzle = texinst->swizzle; - GLuint pass_tex = texinst->src; - - if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) { - pass_tex -= GL_TEXTURE0_ARB; - COPY_4V(machine->Registers[idx], - span->array->attribs[FRAG_ATTRIB_TEX0 + pass_tex][column]); - } - else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) { - pass_tex -= GL_REG_0_ATI; - COPY_4V(machine->Registers[idx], machine->PrevPassRegisters[pass_tex]); - } - apply_swizzle(machine->Registers[idx], swizzle); - -} - -static void -handle_sample_op(GLcontext * ctx, struct atifs_machine *machine, - struct atifs_setupinst *texinst, const SWspan *span, - GLuint column, GLuint idx) -{ -/* sample from unit idx using texinst->src as coords */ - GLuint swizzle = texinst->swizzle; - GLuint coord_source = texinst->src; - GLfloat tex_coords[4] = { 0 }; - - if (coord_source >= GL_TEXTURE0_ARB && coord_source <= GL_TEXTURE7_ARB) { - coord_source -= GL_TEXTURE0_ARB; - COPY_4V(tex_coords, - span->array->attribs[FRAG_ATTRIB_TEX0 + coord_source][column]); - } - else if (coord_source >= GL_REG_0_ATI && coord_source <= GL_REG_5_ATI) { - coord_source -= GL_REG_0_ATI; - COPY_4V(tex_coords, machine->PrevPassRegisters[coord_source]); - } - apply_swizzle(tex_coords, swizzle); - fetch_texel(ctx, tex_coords, 0.0F, idx, machine->Registers[idx]); -} - -#define SETUP_SRC_REG(optype, i, x) \ -do { \ - COPY_4V(src[optype][i], x); \ -} while (0) - - - -/** - * Execute the given fragment shader. - * NOTE: we do everything in single-precision floating point - * \param ctx - rendering context - * \param shader - the shader to execute - * \param machine - virtual machine state - * \param span - the SWspan we're operating on - * \param column - which pixel [i] we're operating on in the span - */ -static void -execute_shader(GLcontext *ctx, const struct ati_fragment_shader *shader, - struct atifs_machine *machine, const SWspan *span, - GLuint column) -{ - GLuint pc; - struct atifs_instruction *inst; - struct atifs_setupinst *texinst; - GLint optype; - GLuint i; - GLint j, pass; - GLint dstreg; - GLfloat src[2][3][4]; - GLfloat zeros[4] = { 0.0, 0.0, 0.0, 0.0 }; - GLfloat ones[4] = { 1.0, 1.0, 1.0, 1.0 }; - GLfloat dst[2][4], *dstp; - - for (pass = 0; pass < shader->NumPasses; pass++) { - if (pass > 0) - finish_pass(machine); - for (j = 0; j < MAX_NUM_FRAGMENT_REGISTERS_ATI; j++) { - texinst = &shader->SetupInst[pass][j]; - if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) - handle_pass_op(machine, texinst, span, column, j); - else if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) - handle_sample_op(ctx, machine, texinst, span, column, j); - } - - for (pc = 0; pc < shader->numArithInstr[pass]; pc++) { - inst = &shader->Instructions[pass][pc]; - - /* setup the source registers for color and alpha ops */ - for (optype = 0; optype < 2; optype++) { - for (i = 0; i < inst->ArgCount[optype]; i++) { - GLint index = inst->SrcReg[optype][i].Index; - - if (index >= GL_REG_0_ATI && index <= GL_REG_5_ATI) - SETUP_SRC_REG(optype, i, - machine->Registers[index - GL_REG_0_ATI]); - else if (index >= GL_CON_0_ATI && index <= GL_CON_7_ATI) { - if (shader->LocalConstDef & (1 << (index - GL_CON_0_ATI))) { - SETUP_SRC_REG(optype, i, - shader->Constants[index - GL_CON_0_ATI]); - } else { - SETUP_SRC_REG(optype, i, - ctx->ATIFragmentShader.GlobalConstants[index - GL_CON_0_ATI]); - } - } - else if (index == GL_ONE) - SETUP_SRC_REG(optype, i, ones); - else if (index == GL_ZERO) - SETUP_SRC_REG(optype, i, zeros); - else if (index == GL_PRIMARY_COLOR_EXT) - SETUP_SRC_REG(optype, i, - machine->Inputs[ATI_FS_INPUT_PRIMARY]); - else if (index == GL_SECONDARY_INTERPOLATOR_ATI) - SETUP_SRC_REG(optype, i, - machine->Inputs[ATI_FS_INPUT_SECONDARY]); - - apply_src_rep(optype, inst->SrcReg[optype][i].argRep, - src[optype][i]); - apply_src_mod(optype, inst->SrcReg[optype][i].argMod, - src[optype][i]); - } - } - - /* Execute the operations - color then alpha */ - for (optype = 0; optype < 2; optype++) { - if (inst->Opcode[optype]) { - switch (inst->Opcode[optype]) { - case GL_ADD_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - src[optype][0][i] + src[optype][1][i]; - } - else - dst[optype][3] = src[optype][0][3] + src[optype][1][3]; - break; - case GL_SUB_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - src[optype][0][i] - src[optype][1][i]; - } - else - dst[optype][3] = src[optype][0][3] - src[optype][1][3]; - break; - case GL_MUL_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - src[optype][0][i] * src[optype][1][i]; - } - else - dst[optype][3] = src[optype][0][3] * src[optype][1][3]; - break; - case GL_MAD_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - src[optype][0][i] * src[optype][1][i] + - src[optype][2][i]; - } - else - dst[optype][3] = - src[optype][0][3] * src[optype][1][3] + - src[optype][2][3]; - break; - case GL_LERP_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - src[optype][0][i] * src[optype][1][i] + (1 - - src - [optype] - [0][i]) * - src[optype][2][i]; - } - else - dst[optype][3] = - src[optype][0][3] * src[optype][1][3] + (1 - - src[optype] - [0][3]) * - src[optype][2][3]; - break; - - case GL_MOV_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = src[optype][0][i]; - } - else - dst[optype][3] = src[optype][0][3]; - break; - case GL_CND_ATI: - if (!optype) { - for (i = 0; i < 3; i++) { - dst[optype][i] = - (src[optype][2][i] > - 0.5) ? src[optype][0][i] : src[optype][1][i]; - } - } - else { - dst[optype][3] = - (src[optype][2][3] > - 0.5) ? src[optype][0][3] : src[optype][1][3]; - } - break; - - case GL_CND0_ATI: - if (!optype) - for (i = 0; i < 3; i++) { - dst[optype][i] = - (src[optype][2][i] >= - 0) ? src[optype][0][i] : src[optype][1][i]; - } - else { - dst[optype][3] = - (src[optype][2][3] >= - 0) ? src[optype][0][3] : src[optype][1][3]; - } - break; - case GL_DOT2_ADD_ATI: - { - GLfloat result; - - /* DOT 2 always uses the source from the color op */ - /* could save recalculation of dot products for alpha inst */ - result = src[0][0][0] * src[0][1][0] + - src[0][0][1] * src[0][1][1] + src[0][2][2]; - if (!optype) { - for (i = 0; i < 3; i++) { - dst[optype][i] = result; - } - } - else - dst[optype][3] = result; - } - break; - case GL_DOT3_ATI: - { - GLfloat result; - - /* DOT 3 always uses the source from the color op */ - result = src[0][0][0] * src[0][1][0] + - src[0][0][1] * src[0][1][1] + - src[0][0][2] * src[0][1][2]; - - if (!optype) { - for (i = 0; i < 3; i++) { - dst[optype][i] = result; - } - } - else - dst[optype][3] = result; - } - break; - case GL_DOT4_ATI: - { - GLfloat result; - - /* DOT 4 always uses the source from the color op */ - result = src[0][0][0] * src[0][1][0] + - src[0][0][1] * src[0][1][1] + - src[0][0][2] * src[0][1][2] + - src[0][0][3] * src[0][1][3]; - if (!optype) { - for (i = 0; i < 3; i++) { - dst[optype][i] = result; - } - } - else - dst[optype][3] = result; - } - break; - - } - } - } - - /* write out the destination registers */ - for (optype = 0; optype < 2; optype++) { - if (inst->Opcode[optype]) { - dstreg = inst->DstReg[optype].Index; - dstp = machine->Registers[dstreg - GL_REG_0_ATI]; - - if ((optype == 0) || ((inst->Opcode[1] != GL_DOT2_ADD_ATI) && - (inst->Opcode[1] != GL_DOT3_ATI) && (inst->Opcode[1] != GL_DOT4_ATI))) - write_dst_addr(optype, inst->DstReg[optype].dstMod, - inst->DstReg[optype].dstMask, dst[optype], - dstp); - else - write_dst_addr(1, inst->DstReg[0].dstMod, 0, dst[1], dstp); - } - } - } - } -} - - -/** - * Init fragment shader virtual machine state. - */ -static void -init_machine(GLcontext * ctx, struct atifs_machine *machine, - const struct ati_fragment_shader *shader, - const SWspan *span, GLuint col) -{ - GLfloat (*inputs)[4] = machine->Inputs; - GLint i, j; - - for (i = 0; i < 6; i++) { - for (j = 0; j < 4; j++) - machine->Registers[i][j] = 0.0; - } - - COPY_4V(inputs[ATI_FS_INPUT_PRIMARY], span->array->attribs[FRAG_ATTRIB_COL0][col]); - COPY_4V(inputs[ATI_FS_INPUT_SECONDARY], span->array->attribs[FRAG_ATTRIB_COL1][col]); -} - - - -/** - * Execute the current ATI shader program, operating on the given span. - */ -void -_swrast_exec_fragment_shader(GLcontext * ctx, SWspan *span) -{ - const struct ati_fragment_shader *shader = ctx->ATIFragmentShader.Current; - struct atifs_machine machine; - GLuint i; - - /* incoming colors should be floats */ - ASSERT(span->array->ChanType == GL_FLOAT); - - for (i = 0; i < span->end; i++) { - if (span->array->mask[i]) { - init_machine(ctx, &machine, shader, span, i); - - execute_shader(ctx, shader, &machine, span, i); - - /* store result color */ - { - const GLfloat *colOut = machine.Registers[0]; - /*fprintf(stderr,"outputs %f %f %f %f\n", - colOut[0], colOut[1], colOut[2], colOut[3]); */ - COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], colOut); - } - } - } -} +/*
+ * Copyright (C) 2004 David Airlie All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * DAVID AIRLIE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "main/atifragshader.h"
+#include "swrast/s_atifragshader.h"
+#include "swrast/s_context.h"
+
+
+/**
+ * State for executing ATI fragment shader.
+ */
+struct atifs_machine
+{
+ GLfloat Registers[6][4]; /** six temporary registers */
+ GLfloat PrevPassRegisters[6][4];
+ GLfloat Inputs[2][4]; /** Primary, secondary input colors */
+};
+
+
+
+/**
+ * Fetch a texel.
+ */
+static void
+fetch_texel(struct gl_context * ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4])
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* XXX use a float-valued TextureSample routine here!!! */
+ swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat(*)[4]) texcoord,
+ &lambda, (GLfloat (*)[4]) color);
+}
+
+static void
+apply_swizzle(GLfloat values[4], GLuint swizzle)
+{
+ GLfloat s, t, r, q;
+
+ s = values[0];
+ t = values[1];
+ r = values[2];
+ q = values[3];
+
+ switch (swizzle) {
+ case GL_SWIZZLE_STR_ATI:
+ values[0] = s;
+ values[1] = t;
+ values[2] = r;
+ break;
+ case GL_SWIZZLE_STQ_ATI:
+ values[0] = s;
+ values[1] = t;
+ values[2] = q;
+ break;
+ case GL_SWIZZLE_STR_DR_ATI:
+ values[0] = s / r;
+ values[1] = t / r;
+ values[2] = 1 / r;
+ break;
+ case GL_SWIZZLE_STQ_DQ_ATI:
+/* make sure q is not 0 to avoid problems later with infinite values (texture lookup)? */
+ if (q == 0.0F)
+ q = 0.000000001F;
+ values[0] = s / q;
+ values[1] = t / q;
+ values[2] = 1.0F / q;
+ break;
+ }
+ values[3] = 0.0;
+}
+
+static void
+apply_src_rep(GLint optype, GLuint rep, GLfloat * val)
+{
+ GLint i;
+ GLint start, end;
+ if (!rep)
+ return;
+
+ start = optype ? 3 : 0;
+ end = 4;
+
+ for (i = start; i < end; i++) {
+ switch (rep) {
+ case GL_RED:
+ val[i] = val[0];
+ break;
+ case GL_GREEN:
+ val[i] = val[1];
+ break;
+ case GL_BLUE:
+ val[i] = val[2];
+ break;
+ case GL_ALPHA:
+ val[i] = val[3];
+ break;
+ }
+ }
+}
+
+static void
+apply_src_mod(GLint optype, GLuint mod, GLfloat * val)
+{
+ GLint i;
+ GLint start, end;
+
+ if (!mod)
+ return;
+
+ start = optype ? 3 : 0;
+ end = 4;
+
+ for (i = start; i < end; i++) {
+ if (mod & GL_COMP_BIT_ATI)
+ val[i] = 1 - val[i];
+
+ if (mod & GL_BIAS_BIT_ATI)
+ val[i] = val[i] - 0.5F;
+
+ if (mod & GL_2X_BIT_ATI)
+ val[i] = 2 * val[i];
+
+ if (mod & GL_NEGATE_BIT_ATI)
+ val[i] = -val[i];
+ }
+}
+
+static void
+apply_dst_mod(GLuint optype, GLuint mod, GLfloat * val)
+{
+ GLint i;
+ GLint has_sat = mod & GL_SATURATE_BIT_ATI;
+ GLint start, end;
+
+ mod &= ~GL_SATURATE_BIT_ATI;
+
+ start = optype ? 3 : 0;
+ end = optype ? 4 : 3;
+
+ for (i = start; i < end; i++) {
+ switch (mod) {
+ case GL_2X_BIT_ATI:
+ val[i] = 2 * val[i];
+ break;
+ case GL_4X_BIT_ATI:
+ val[i] = 4 * val[i];
+ break;
+ case GL_8X_BIT_ATI:
+ val[i] = 8 * val[i];
+ break;
+ case GL_HALF_BIT_ATI:
+ val[i] = val[i] * 0.5F;
+ break;
+ case GL_QUARTER_BIT_ATI:
+ val[i] = val[i] * 0.25F;
+ break;
+ case GL_EIGHTH_BIT_ATI:
+ val[i] = val[i] * 0.125F;
+ break;
+ }
+
+ if (has_sat) {
+ if (val[i] < 0.0F)
+ val[i] = 0.0F;
+ else if (val[i] > 1.0F)
+ val[i] = 1.0F;
+ }
+ else {
+ if (val[i] < -8.0F)
+ val[i] = -8.0F;
+ else if (val[i] > 8.0F)
+ val[i] = 8.0F;
+ }
+ }
+}
+
+
+static void
+write_dst_addr(GLuint optype, GLuint mod, GLuint mask, GLfloat * src,
+ GLfloat * dst)
+{
+ GLint i;
+ apply_dst_mod(optype, mod, src);
+
+ if (optype == ATI_FRAGMENT_SHADER_COLOR_OP) {
+ if (mask) {
+ if (mask & GL_RED_BIT_ATI)
+ dst[0] = src[0];
+
+ if (mask & GL_GREEN_BIT_ATI)
+ dst[1] = src[1];
+
+ if (mask & GL_BLUE_BIT_ATI)
+ dst[2] = src[2];
+ }
+ else {
+ for (i = 0; i < 3; i++)
+ dst[i] = src[i];
+ }
+ }
+ else
+ dst[3] = src[3];
+}
+
+static void
+finish_pass(struct atifs_machine *machine)
+{
+ GLint i;
+
+ for (i = 0; i < 6; i++) {
+ COPY_4V(machine->PrevPassRegisters[i], machine->Registers[i]);
+ }
+}
+
+struct ati_fs_opcode_st ati_fs_opcodes[] = {
+ {GL_ADD_ATI, 2},
+ {GL_SUB_ATI, 2},
+ {GL_MUL_ATI, 2},
+ {GL_MAD_ATI, 3},
+ {GL_LERP_ATI, 3},
+ {GL_MOV_ATI, 1},
+ {GL_CND_ATI, 3},
+ {GL_CND0_ATI, 3},
+ {GL_DOT2_ADD_ATI, 3},
+ {GL_DOT3_ATI, 2},
+ {GL_DOT4_ATI, 2}
+};
+
+
+
+static void
+handle_pass_op(struct atifs_machine *machine, struct atifs_setupinst *texinst,
+ const SWspan *span, GLuint column, GLuint idx)
+{
+ GLuint swizzle = texinst->swizzle;
+ GLuint pass_tex = texinst->src;
+
+ if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
+ pass_tex -= GL_TEXTURE0_ARB;
+ COPY_4V(machine->Registers[idx],
+ span->array->attribs[FRAG_ATTRIB_TEX0 + pass_tex][column]);
+ }
+ else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {
+ pass_tex -= GL_REG_0_ATI;
+ COPY_4V(machine->Registers[idx], machine->PrevPassRegisters[pass_tex]);
+ }
+ apply_swizzle(machine->Registers[idx], swizzle);
+
+}
+
+static void
+handle_sample_op(struct gl_context * ctx, struct atifs_machine *machine,
+ struct atifs_setupinst *texinst, const SWspan *span,
+ GLuint column, GLuint idx)
+{
+/* sample from unit idx using texinst->src as coords */
+ GLuint swizzle = texinst->swizzle;
+ GLuint coord_source = texinst->src;
+ GLfloat tex_coords[4] = { 0 };
+
+ if (coord_source >= GL_TEXTURE0_ARB && coord_source <= GL_TEXTURE7_ARB) {
+ coord_source -= GL_TEXTURE0_ARB;
+ COPY_4V(tex_coords,
+ span->array->attribs[FRAG_ATTRIB_TEX0 + coord_source][column]);
+ }
+ else if (coord_source >= GL_REG_0_ATI && coord_source <= GL_REG_5_ATI) {
+ coord_source -= GL_REG_0_ATI;
+ COPY_4V(tex_coords, machine->PrevPassRegisters[coord_source]);
+ }
+ apply_swizzle(tex_coords, swizzle);
+ fetch_texel(ctx, tex_coords, 0.0F, idx, machine->Registers[idx]);
+}
+
+#define SETUP_SRC_REG(optype, i, x) \
+do { \
+ COPY_4V(src[optype][i], x); \
+} while (0)
+
+
+
+/**
+ * Execute the given fragment shader.
+ * NOTE: we do everything in single-precision floating point
+ * \param ctx - rendering context
+ * \param shader - the shader to execute
+ * \param machine - virtual machine state
+ * \param span - the SWspan we're operating on
+ * \param column - which pixel [i] we're operating on in the span
+ */
+static void
+execute_shader(struct gl_context *ctx, const struct ati_fragment_shader *shader,
+ struct atifs_machine *machine, const SWspan *span,
+ GLuint column)
+{
+ GLuint pc;
+ struct atifs_instruction *inst;
+ struct atifs_setupinst *texinst;
+ GLint optype;
+ GLuint i;
+ GLint j, pass;
+ GLint dstreg;
+ GLfloat src[2][3][4];
+ GLfloat zeros[4] = { 0.0, 0.0, 0.0, 0.0 };
+ GLfloat ones[4] = { 1.0, 1.0, 1.0, 1.0 };
+ GLfloat dst[2][4], *dstp;
+
+ for (pass = 0; pass < shader->NumPasses; pass++) {
+ if (pass > 0)
+ finish_pass(machine);
+ for (j = 0; j < MAX_NUM_FRAGMENT_REGISTERS_ATI; j++) {
+ texinst = &shader->SetupInst[pass][j];
+ if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP)
+ handle_pass_op(machine, texinst, span, column, j);
+ else if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP)
+ handle_sample_op(ctx, machine, texinst, span, column, j);
+ }
+
+ for (pc = 0; pc < shader->numArithInstr[pass]; pc++) {
+ inst = &shader->Instructions[pass][pc];
+
+ /* setup the source registers for color and alpha ops */
+ for (optype = 0; optype < 2; optype++) {
+ for (i = 0; i < inst->ArgCount[optype]; i++) {
+ GLint index = inst->SrcReg[optype][i].Index;
+
+ if (index >= GL_REG_0_ATI && index <= GL_REG_5_ATI)
+ SETUP_SRC_REG(optype, i,
+ machine->Registers[index - GL_REG_0_ATI]);
+ else if (index >= GL_CON_0_ATI && index <= GL_CON_7_ATI) {
+ if (shader->LocalConstDef & (1 << (index - GL_CON_0_ATI))) {
+ SETUP_SRC_REG(optype, i,
+ shader->Constants[index - GL_CON_0_ATI]);
+ } else {
+ SETUP_SRC_REG(optype, i,
+ ctx->ATIFragmentShader.GlobalConstants[index - GL_CON_0_ATI]);
+ }
+ }
+ else if (index == GL_ONE)
+ SETUP_SRC_REG(optype, i, ones);
+ else if (index == GL_ZERO)
+ SETUP_SRC_REG(optype, i, zeros);
+ else if (index == GL_PRIMARY_COLOR_EXT)
+ SETUP_SRC_REG(optype, i,
+ machine->Inputs[ATI_FS_INPUT_PRIMARY]);
+ else if (index == GL_SECONDARY_INTERPOLATOR_ATI)
+ SETUP_SRC_REG(optype, i,
+ machine->Inputs[ATI_FS_INPUT_SECONDARY]);
+
+ apply_src_rep(optype, inst->SrcReg[optype][i].argRep,
+ src[optype][i]);
+ apply_src_mod(optype, inst->SrcReg[optype][i].argMod,
+ src[optype][i]);
+ }
+ }
+
+ /* Execute the operations - color then alpha */
+ for (optype = 0; optype < 2; optype++) {
+ if (inst->Opcode[optype]) {
+ switch (inst->Opcode[optype]) {
+ case GL_ADD_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ src[optype][0][i] + src[optype][1][i];
+ }
+ else
+ dst[optype][3] = src[optype][0][3] + src[optype][1][3];
+ break;
+ case GL_SUB_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ src[optype][0][i] - src[optype][1][i];
+ }
+ else
+ dst[optype][3] = src[optype][0][3] - src[optype][1][3];
+ break;
+ case GL_MUL_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ src[optype][0][i] * src[optype][1][i];
+ }
+ else
+ dst[optype][3] = src[optype][0][3] * src[optype][1][3];
+ break;
+ case GL_MAD_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ src[optype][0][i] * src[optype][1][i] +
+ src[optype][2][i];
+ }
+ else
+ dst[optype][3] =
+ src[optype][0][3] * src[optype][1][3] +
+ src[optype][2][3];
+ break;
+ case GL_LERP_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ src[optype][0][i] * src[optype][1][i] + (1 -
+ src
+ [optype]
+ [0][i]) *
+ src[optype][2][i];
+ }
+ else
+ dst[optype][3] =
+ src[optype][0][3] * src[optype][1][3] + (1 -
+ src[optype]
+ [0][3]) *
+ src[optype][2][3];
+ break;
+
+ case GL_MOV_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] = src[optype][0][i];
+ }
+ else
+ dst[optype][3] = src[optype][0][3];
+ break;
+ case GL_CND_ATI:
+ if (!optype) {
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ (src[optype][2][i] >
+ 0.5) ? src[optype][0][i] : src[optype][1][i];
+ }
+ }
+ else {
+ dst[optype][3] =
+ (src[optype][2][3] >
+ 0.5) ? src[optype][0][3] : src[optype][1][3];
+ }
+ break;
+
+ case GL_CND0_ATI:
+ if (!optype)
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] =
+ (src[optype][2][i] >=
+ 0) ? src[optype][0][i] : src[optype][1][i];
+ }
+ else {
+ dst[optype][3] =
+ (src[optype][2][3] >=
+ 0) ? src[optype][0][3] : src[optype][1][3];
+ }
+ break;
+ case GL_DOT2_ADD_ATI:
+ {
+ GLfloat result;
+
+ /* DOT 2 always uses the source from the color op */
+ /* could save recalculation of dot products for alpha inst */
+ result = src[0][0][0] * src[0][1][0] +
+ src[0][0][1] * src[0][1][1] + src[0][2][2];
+ if (!optype) {
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] = result;
+ }
+ }
+ else
+ dst[optype][3] = result;
+ }
+ break;
+ case GL_DOT3_ATI:
+ {
+ GLfloat result;
+
+ /* DOT 3 always uses the source from the color op */
+ result = src[0][0][0] * src[0][1][0] +
+ src[0][0][1] * src[0][1][1] +
+ src[0][0][2] * src[0][1][2];
+
+ if (!optype) {
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] = result;
+ }
+ }
+ else
+ dst[optype][3] = result;
+ }
+ break;
+ case GL_DOT4_ATI:
+ {
+ GLfloat result;
+
+ /* DOT 4 always uses the source from the color op */
+ result = src[0][0][0] * src[0][1][0] +
+ src[0][0][1] * src[0][1][1] +
+ src[0][0][2] * src[0][1][2] +
+ src[0][0][3] * src[0][1][3];
+ if (!optype) {
+ for (i = 0; i < 3; i++) {
+ dst[optype][i] = result;
+ }
+ }
+ else
+ dst[optype][3] = result;
+ }
+ break;
+
+ }
+ }
+ }
+
+ /* write out the destination registers */
+ for (optype = 0; optype < 2; optype++) {
+ if (inst->Opcode[optype]) {
+ dstreg = inst->DstReg[optype].Index;
+ dstp = machine->Registers[dstreg - GL_REG_0_ATI];
+
+ if ((optype == 0) || ((inst->Opcode[1] != GL_DOT2_ADD_ATI) &&
+ (inst->Opcode[1] != GL_DOT3_ATI) && (inst->Opcode[1] != GL_DOT4_ATI)))
+ write_dst_addr(optype, inst->DstReg[optype].dstMod,
+ inst->DstReg[optype].dstMask, dst[optype],
+ dstp);
+ else
+ write_dst_addr(1, inst->DstReg[0].dstMod, 0, dst[1], dstp);
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Init fragment shader virtual machine state.
+ */
+static void
+init_machine(struct gl_context * ctx, struct atifs_machine *machine,
+ const struct ati_fragment_shader *shader,
+ const SWspan *span, GLuint col)
+{
+ GLfloat (*inputs)[4] = machine->Inputs;
+ GLint i, j;
+
+ for (i = 0; i < 6; i++) {
+ for (j = 0; j < 4; j++)
+ machine->Registers[i][j] = 0.0;
+ }
+
+ COPY_4V(inputs[ATI_FS_INPUT_PRIMARY], span->array->attribs[FRAG_ATTRIB_COL0][col]);
+ COPY_4V(inputs[ATI_FS_INPUT_SECONDARY], span->array->attribs[FRAG_ATTRIB_COL1][col]);
+}
+
+
+
+/**
+ * Execute the current ATI shader program, operating on the given span.
+ */
+void
+_swrast_exec_fragment_shader(struct gl_context * ctx, SWspan *span)
+{
+ const struct ati_fragment_shader *shader = ctx->ATIFragmentShader.Current;
+ struct atifs_machine machine;
+ GLuint i;
+
+ /* incoming colors should be floats */
+ ASSERT(span->array->ChanType == GL_FLOAT);
+
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ init_machine(ctx, &machine, shader, span, i);
+
+ execute_shader(ctx, shader, &machine, span, i);
+
+ /* store result color */
+ {
+ const GLfloat *colOut = machine.Registers[0];
+ /*fprintf(stderr,"outputs %f %f %f %f\n",
+ colOut[0], colOut[1], colOut[2], colOut[3]); */
+ COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], colOut);
+ }
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_atifragshader.h b/mesalib/src/mesa/swrast/s_atifragshader.h index cce455a04..16ed86fd7 100644 --- a/mesalib/src/mesa/swrast/s_atifragshader.h +++ b/mesalib/src/mesa/swrast/s_atifragshader.h @@ -1,38 +1,38 @@ -/* - * Mesa 3-D graphics library - * Version: 6.1 - * - * Copyright (C) 1999-2003 David Airlie All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * DAVID AIRLIE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_ATIFRAGSHADER_H -#define S_ATIFRAGSHADER_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern void -_swrast_exec_fragment_shader( GLcontext *ctx, SWspan *span ); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2003 David Airlie All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * DAVID AIRLIE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_ATIFRAGSHADER_H
+#define S_ATIFRAGSHADER_H
+
+
+#include "s_span.h"
+
+struct gl_context;
+
+extern void
+_swrast_exec_fragment_shader( struct gl_context *ctx, SWspan *span );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_bitmap.c b/mesalib/src/mesa/swrast/s_bitmap.c index da730213a..9b52e9053 100644 --- a/mesalib/src/mesa/swrast/s_bitmap.c +++ b/mesalib/src/mesa/swrast/s_bitmap.c @@ -1,222 +1,222 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/** - * \file swrast/s_bitmap.c - * \brief glBitmap rendering. - * \author Brian Paul - */ - -#include "main/glheader.h" -#include "main/bufferobj.h" -#include "main/condrender.h" -#include "main/image.h" -#include "main/macros.h" - -#include "s_context.h" -#include "s_span.h" - - - -/** - * Render a bitmap. - * Called via ctx->Driver.Bitmap() - * All parameter error checking will have been done before this is called. - */ -void -_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py, - GLsizei width, GLsizei height, - const struct gl_pixelstore_attrib *unpack, - const GLubyte *bitmap ) -{ - GLint row, col; - GLuint count = 0; - SWspan span; - - ASSERT(ctx->RenderMode == GL_RENDER); - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't draw */ - - bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap); - if (!bitmap) - return; - - swrast_render_start(ctx); - - if (SWRAST_CONTEXT(ctx)->NewState) - _swrast_validate_derived( ctx ); - - INIT_SPAN(span, GL_BITMAP); - span.end = width; - span.arrayMask = SPAN_XY; - _swrast_span_default_attribs(ctx, &span); - - for (row = 0; row < height; row++) { - const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, - bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); - - if (unpack->LsbFirst) { - /* Lsb first */ - GLubyte mask = 1U << (unpack->SkipPixels & 0x7); - for (col = 0; col < width; col++) { - if (*src & mask) { - span.array->x[count] = px + col; - span.array->y[count] = py + row; - count++; - } - if (mask == 128U) { - src++; - mask = 1U; - } - else { - mask = mask << 1; - } - } - - /* get ready for next row */ - if (mask != 1) - src++; - } - else { - /* Msb first */ - GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); - for (col = 0; col < width; col++) { - if (*src & mask) { - span.array->x[count] = px + col; - span.array->y[count] = py + row; - count++; - } - if (mask == 1U) { - src++; - mask = 128U; - } - else { - mask = mask >> 1; - } - } - - /* get ready for next row */ - if (mask != 128) - src++; - } - - if (count + width >= MAX_WIDTH || row + 1 == height) { - /* flush the span */ - span.end = count; - _swrast_write_rgba_span(ctx, &span); - span.end = 0; - count = 0; - } - } - - swrast_render_finish(ctx); - - _mesa_unmap_pbo_source(ctx, unpack); -} - - -#if 0 -/* - * XXX this is another way to implement Bitmap. Use horizontal runs of - * fragments, initializing the mask array to indicate which fragments to - * draw or skip. - */ -void -_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py, - GLsizei width, GLsizei height, - const struct gl_pixelstore_attrib *unpack, - const GLubyte *bitmap ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLint row, col; - SWspan span; - - ASSERT(ctx->RenderMode == GL_RENDER); - ASSERT(bitmap); - - swrast_render_start(ctx); - - if (SWRAST_CONTEXT(ctx)->NewState) - _swrast_validate_derived( ctx ); - - INIT_SPAN(span, GL_BITMAP); - span.end = width; - span.arrayMask = SPAN_MASK; - _swrast_span_default_attribs(ctx, &span); - - /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */ - span.x = px; - span.y = py; - /*span.end = width;*/ - - for (row=0; row<height; row++, span.y++) { - const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, - bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); - - if (unpack->LsbFirst) { - /* Lsb first */ - GLubyte mask = 1U << (unpack->SkipPixels & 0x7); - for (col=0; col<width; col++) { - span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE; - if (mask == 128U) { - src++; - mask = 1U; - } - else { - mask = mask << 1; - } - } - - _swrast_write_rgba_span(ctx, &span); - - /* get ready for next row */ - if (mask != 1) - src++; - } - else { - /* Msb first */ - GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); - for (col=0; col<width; col++) { - span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE; - if (mask == 1U) { - src++; - mask = 128U; - } - else { - mask = mask >> 1; - } - } - - _swrast_write_rgba_span(ctx, &span); - - /* get ready for next row */ - if (mask != 128) - src++; - } - } - - swrast_render_finish(ctx); -} -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file swrast/s_bitmap.c
+ * \brief glBitmap rendering.
+ * \author Brian Paul
+ */
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/condrender.h"
+#include "main/image.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_span.h"
+
+
+
+/**
+ * Render a bitmap.
+ * Called via ctx->Driver.Bitmap()
+ * All parameter error checking will have been done before this is called.
+ */
+void
+_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ GLint row, col;
+ GLuint count = 0;
+ SWspan span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't draw */
+
+ bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap);
+ if (!bitmap)
+ return;
+
+ swrast_render_start(ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_XY;
+ _swrast_span_default_attribs(ctx, &span);
+
+ for (row = 0; row < height; row++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+
+ if (count + width >= MAX_WIDTH || row + 1 == height) {
+ /* flush the span */
+ span.end = count;
+ _swrast_write_rgba_span(ctx, &span);
+ span.end = 0;
+ count = 0;
+ }
+ }
+
+ swrast_render_finish(ctx);
+
+ _mesa_unmap_pbo_source(ctx, unpack);
+}
+
+
+#if 0
+/*
+ * XXX this is another way to implement Bitmap. Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragments to
+ * draw or skip.
+ */
+void
+_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint row, col;
+ SWspan span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+ ASSERT(bitmap);
+
+ swrast_render_start(ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_MASK;
+ _swrast_span_default_attribs(ctx, &span);
+
+ /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
+ span.x = px;
+ span.y = py;
+ /*span.end = width;*/
+
+ for (row=0; row<height; row++, span.y++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ _swrast_write_rgba_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ _swrast_write_rgba_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
+#endif
diff --git a/mesalib/src/mesa/swrast/s_blend.c b/mesalib/src/mesa/swrast/s_blend.c index 5b090c72c..d2684b79e 100644 --- a/mesalib/src/mesa/swrast/s_blend.c +++ b/mesalib/src/mesa/swrast/s_blend.c @@ -1,1002 +1,1014 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/** - * \file swrast/s_blend.c - * \brief software blending. - * \author Brian Paul - * - * Only a few blend modes have been optimized (min, max, transparency, add) - * more optimized cases can easily be added if needed. - * Celestia uses glBlendFunc(GL_SRC_ALPHA, GL_ONE), for example. - */ - - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/macros.h" - -#include "s_blend.h" -#include "s_context.h" -#include "s_span.h" - - -#if defined(USE_MMX_ASM) -#include "x86/mmx.h" -#include "x86/common_x86_asm.h" -#define _BLENDAPI _ASMAPI -#else -#define _BLENDAPI -#endif - - -/** - * Integer divide by 255 - * Declare "int divtemp" before using. - * This satisfies Glean and should be reasonably fast. - * Contributed by Nathan Hand. - */ -#define DIV255(X) (divtemp = (X), ((divtemp << 8) + divtemp + 256) >> 16) - - - -/** - * Special case for glBlendFunc(GL_ZERO, GL_ONE). - * No-op means the framebuffer values remain unchanged. - * Any chanType ok. - */ -static void _BLENDAPI -blend_noop(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLint bytes; - - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_ZERO); - ASSERT(ctx->Color.BlendDstRGB == GL_ONE); - (void) ctx; - - /* just memcpy */ - if (chanType == GL_UNSIGNED_BYTE) - bytes = 4 * n * sizeof(GLubyte); - else if (chanType == GL_UNSIGNED_SHORT) - bytes = 4 * n * sizeof(GLushort); - else - bytes = 4 * n * sizeof(GLfloat); - - memcpy(src, dst, bytes); -} - - -/** - * Special case for glBlendFunc(GL_ONE, GL_ZERO) - * Any chanType ok. - */ -static void _BLENDAPI -blend_replace(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_ONE); - ASSERT(ctx->Color.BlendDstRGB == GL_ZERO); - (void) ctx; - (void) n; - (void) mask; - (void) src; - (void) dst; -} - - -/** - * Common transparency blending mode: - * glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA). - */ -static void _BLENDAPI -blend_transparency_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - GLuint i; - - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(chanType == GL_UNSIGNED_BYTE); - - (void) ctx; - - for (i = 0; i < n; i++) { - if (mask[i]) { - const GLint t = rgba[i][ACOMP]; /* t is in [0, 255] */ - if (t == 0) { - /* 0% alpha */ - COPY_4UBV(rgba[i], dest[i]); - } - else if (t != 255) { - GLint divtemp; - const GLint r = DIV255((rgba[i][RCOMP] - dest[i][RCOMP]) * t) + dest[i][RCOMP]; - const GLint g = DIV255((rgba[i][GCOMP] - dest[i][GCOMP]) * t) + dest[i][GCOMP]; - const GLint b = DIV255((rgba[i][BCOMP] - dest[i][BCOMP]) * t) + dest[i][BCOMP]; - const GLint a = DIV255((rgba[i][ACOMP] - dest[i][ACOMP]) * t) + dest[i][ACOMP]; - ASSERT(r <= 255); - ASSERT(g <= 255); - ASSERT(b <= 255); - ASSERT(a <= 255); - rgba[i][RCOMP] = (GLubyte) r; - rgba[i][GCOMP] = (GLubyte) g; - rgba[i][BCOMP] = (GLubyte) b; - rgba[i][ACOMP] = (GLubyte) a; - } - } - } -} - - -static void _BLENDAPI -blend_transparency_ushort(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - GLuint i; - - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(chanType == GL_UNSIGNED_SHORT); - - (void) ctx; - - for (i = 0; i < n; i++) { - if (mask[i]) { - const GLint t = rgba[i][ACOMP]; - if (t == 0) { - /* 0% alpha */ - COPY_4V(rgba[i], dest[i]); - } - else if (t != 65535) { - const GLfloat tt = (GLfloat) t / 65535.0F; - GLushort r = (GLushort) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]); - GLushort g = (GLushort) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]); - GLushort b = (GLushort) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]); - GLushort a = (GLushort) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]); - ASSIGN_4V(rgba[i], r, g, b, a); - } - } - } -} - - -static void _BLENDAPI -blend_transparency_float(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLfloat (*rgba)[4] = (GLfloat (*)[4]) src; - const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst; - GLuint i; - - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA); - ASSERT(chanType == GL_FLOAT); - - (void) ctx; - - for (i = 0; i < n; i++) { - if (mask[i]) { - const GLfloat t = rgba[i][ACOMP]; /* t in [0, 1] */ - if (t == 0.0F) { - /* 0% alpha */ - COPY_4V(rgba[i], dest[i]); - } - else if (t != 1.0F) { - GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * t + dest[i][RCOMP]; - GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * t + dest[i][GCOMP]; - GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * t + dest[i][BCOMP]; - GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * t + dest[i][ACOMP]; - ASSIGN_4V(rgba[i], r, g, b, a); - } - } - } -} - - - -/** - * Add src and dest: glBlendFunc(GL_ONE, GL_ONE). - * Any chanType ok. - */ -static void _BLENDAPI -blend_add(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLuint i; - - ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD); - ASSERT(ctx->Color.BlendSrcRGB == GL_ONE); - ASSERT(ctx->Color.BlendDstRGB == GL_ONE); - (void) ctx; - - if (chanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - GLint r = rgba[i][RCOMP] + dest[i][RCOMP]; - GLint g = rgba[i][GCOMP] + dest[i][GCOMP]; - GLint b = rgba[i][BCOMP] + dest[i][BCOMP]; - GLint a = rgba[i][ACOMP] + dest[i][ACOMP]; - rgba[i][RCOMP] = (GLubyte) MIN2( r, 255 ); - rgba[i][GCOMP] = (GLubyte) MIN2( g, 255 ); - rgba[i][BCOMP] = (GLubyte) MIN2( b, 255 ); - rgba[i][ACOMP] = (GLubyte) MIN2( a, 255 ); - } - } - } - else if (chanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - GLint r = rgba[i][RCOMP] + dest[i][RCOMP]; - GLint g = rgba[i][GCOMP] + dest[i][GCOMP]; - GLint b = rgba[i][BCOMP] + dest[i][BCOMP]; - GLint a = rgba[i][ACOMP] + dest[i][ACOMP]; - rgba[i][RCOMP] = (GLshort) MIN2( r, 255 ); - rgba[i][GCOMP] = (GLshort) MIN2( g, 255 ); - rgba[i][BCOMP] = (GLshort) MIN2( b, 255 ); - rgba[i][ACOMP] = (GLshort) MIN2( a, 255 ); - } - } - } - else { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) src; - const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst; - ASSERT(chanType == GL_FLOAT); - for (i=0;i<n;i++) { - if (mask[i]) { - /* don't RGB clamp to max */ - rgba[i][RCOMP] += dest[i][RCOMP]; - rgba[i][GCOMP] += dest[i][GCOMP]; - rgba[i][BCOMP] += dest[i][BCOMP]; - rgba[i][ACOMP] += dest[i][ACOMP]; - } - } - } -} - - - -/** - * Blend min function. - * Any chanType ok. - */ -static void _BLENDAPI -blend_min(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLuint i; - ASSERT(ctx->Color.BlendEquationRGB == GL_MIN); - ASSERT(ctx->Color.BlendEquationA == GL_MIN); - (void) ctx; - - if (chanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } - else if (chanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } - else { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) src; - const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst; - ASSERT(chanType == GL_FLOAT); - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } -} - - -/** - * Blend max function. - * Any chanType ok. - */ -static void _BLENDAPI -blend_max(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLuint i; - ASSERT(ctx->Color.BlendEquationRGB == GL_MAX); - ASSERT(ctx->Color.BlendEquationA == GL_MAX); - (void) ctx; - - if (chanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } - else if (chanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } - else { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) src; - const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst; - ASSERT(chanType == GL_FLOAT); - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] ); - rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] ); - rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] ); - rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] ); - } - } - } -} - - - -/** - * Modulate: result = src * dest - * Any chanType ok. - */ -static void _BLENDAPI -blend_modulate(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, GLenum chanType) -{ - GLuint i; - (void) ctx; - - if (chanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - GLint divtemp; - rgba[i][RCOMP] = DIV255(rgba[i][RCOMP] * dest[i][RCOMP]); - rgba[i][GCOMP] = DIV255(rgba[i][GCOMP] * dest[i][GCOMP]); - rgba[i][BCOMP] = DIV255(rgba[i][BCOMP] * dest[i][BCOMP]); - rgba[i][ACOMP] = DIV255(rgba[i][ACOMP] * dest[i][ACOMP]); - } - } - } - else if (chanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16; - rgba[i][GCOMP] = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16; - rgba[i][BCOMP] = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16; - rgba[i][ACOMP] = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16; - } - } - } - else { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) src; - const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst; - ASSERT(chanType == GL_FLOAT); - for (i=0;i<n;i++) { - if (mask[i]) { - rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP]; - rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP]; - rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP]; - rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP]; - } - } - } -} - - -/** - * Do any blending operation, using floating point. - * \param n number of pixels - * \param mask fragment writemask array - * \param rgba array of incoming (and modified) pixels - * \param dest array of pixels from the dest color buffer - */ -static void -blend_general_float(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLfloat rgba[][4], GLfloat dest[][4], - GLenum chanType) -{ - GLuint i; - - for (i = 0; i < n; i++) { - if (mask[i]) { - /* Incoming/source Color */ - const GLfloat Rs = rgba[i][RCOMP]; - const GLfloat Gs = rgba[i][GCOMP]; - const GLfloat Bs = rgba[i][BCOMP]; - const GLfloat As = rgba[i][ACOMP]; - - /* Frame buffer/dest color */ - const GLfloat Rd = dest[i][RCOMP]; - const GLfloat Gd = dest[i][GCOMP]; - const GLfloat Bd = dest[i][BCOMP]; - const GLfloat Ad = dest[i][ACOMP]; - - GLfloat sR, sG, sB, sA; /* Source factor */ - GLfloat dR, dG, dB, dA; /* Dest factor */ - GLfloat r, g, b, a; /* result color */ - - /* XXX for the case of constant blend terms we could init - * the sX and dX variables just once before the loop. - */ - - /* Source RGB factor */ - switch (ctx->Color.BlendSrcRGB) { - case GL_ZERO: - sR = sG = sB = 0.0F; - break; - case GL_ONE: - sR = sG = sB = 1.0F; - break; - case GL_DST_COLOR: - sR = Rd; - sG = Gd; - sB = Bd; - break; - case GL_ONE_MINUS_DST_COLOR: - sR = 1.0F - Rd; - sG = 1.0F - Gd; - sB = 1.0F - Bd; - break; - case GL_SRC_ALPHA: - sR = sG = sB = As; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sR = sG = sB = 1.0F - As; - break; - case GL_DST_ALPHA: - sR = sG = sB = Ad; - break; - case GL_ONE_MINUS_DST_ALPHA: - sR = sG = sB = 1.0F - Ad; - break; - case GL_SRC_ALPHA_SATURATE: - if (As < 1.0F - Ad) { - sR = sG = sB = As; - } - else { - sR = sG = sB = 1.0F - Ad; - } - break; - case GL_CONSTANT_COLOR: - sR = ctx->Color.BlendColor[0]; - sG = ctx->Color.BlendColor[1]; - sB = ctx->Color.BlendColor[2]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - sR = 1.0F - ctx->Color.BlendColor[0]; - sG = 1.0F - ctx->Color.BlendColor[1]; - sB = 1.0F - ctx->Color.BlendColor[2]; - break; - case GL_CONSTANT_ALPHA: - sR = sG = sB = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - sR = sG = sB = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_SRC_COLOR: - sR = Rs; - sG = Gs; - sB = Bs; - break; - case GL_ONE_MINUS_SRC_COLOR: - sR = 1.0F - Rs; - sG = 1.0F - Gs; - sB = 1.0F - Bs; - break; - default: - /* this should never happen */ - _mesa_problem(ctx, "Bad blend source RGB factor in blend_general_float"); - return; - } - - /* Source Alpha factor */ - switch (ctx->Color.BlendSrcA) { - case GL_ZERO: - sA = 0.0F; - break; - case GL_ONE: - sA = 1.0F; - break; - case GL_DST_COLOR: - sA = Ad; - break; - case GL_ONE_MINUS_DST_COLOR: - sA = 1.0F - Ad; - break; - case GL_SRC_ALPHA: - sA = As; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sA = 1.0F - As; - break; - case GL_DST_ALPHA: - sA = Ad; - break; - case GL_ONE_MINUS_DST_ALPHA: - sA = 1.0F - Ad; - break; - case GL_SRC_ALPHA_SATURATE: - sA = 1.0; - break; - case GL_CONSTANT_COLOR: - sA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - sA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_CONSTANT_ALPHA: - sA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - sA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_SRC_COLOR: - sA = As; - break; - case GL_ONE_MINUS_SRC_COLOR: - sA = 1.0F - As; - break; - default: - /* this should never happen */ - sA = 0.0F; - _mesa_problem(ctx, "Bad blend source A factor in blend_general_float"); - return; - } - - /* Dest RGB factor */ - switch (ctx->Color.BlendDstRGB) { - case GL_ZERO: - dR = dG = dB = 0.0F; - break; - case GL_ONE: - dR = dG = dB = 1.0F; - break; - case GL_SRC_COLOR: - dR = Rs; - dG = Gs; - dB = Bs; - break; - case GL_ONE_MINUS_SRC_COLOR: - dR = 1.0F - Rs; - dG = 1.0F - Gs; - dB = 1.0F - Bs; - break; - case GL_SRC_ALPHA: - dR = dG = dB = As; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dR = dG = dB = 1.0F - As; - break; - case GL_DST_ALPHA: - dR = dG = dB = Ad; - break; - case GL_ONE_MINUS_DST_ALPHA: - dR = dG = dB = 1.0F - Ad; - break; - case GL_CONSTANT_COLOR: - dR = ctx->Color.BlendColor[0]; - dG = ctx->Color.BlendColor[1]; - dB = ctx->Color.BlendColor[2]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - dR = 1.0F - ctx->Color.BlendColor[0]; - dG = 1.0F - ctx->Color.BlendColor[1]; - dB = 1.0F - ctx->Color.BlendColor[2]; - break; - case GL_CONSTANT_ALPHA: - dR = dG = dB = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - dR = dG = dB = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_DST_COLOR: - dR = Rd; - dG = Gd; - dB = Bd; - break; - case GL_ONE_MINUS_DST_COLOR: - dR = 1.0F - Rd; - dG = 1.0F - Gd; - dB = 1.0F - Bd; - break; - default: - /* this should never happen */ - dR = dG = dB = 0.0F; - _mesa_problem(ctx, "Bad blend dest RGB factor in blend_general_float"); - return; - } - - /* Dest Alpha factor */ - switch (ctx->Color.BlendDstA) { - case GL_ZERO: - dA = 0.0F; - break; - case GL_ONE: - dA = 1.0F; - break; - case GL_SRC_COLOR: - dA = As; - break; - case GL_ONE_MINUS_SRC_COLOR: - dA = 1.0F - As; - break; - case GL_SRC_ALPHA: - dA = As; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dA = 1.0F - As; - break; - case GL_DST_ALPHA: - dA = Ad; - break; - case GL_ONE_MINUS_DST_ALPHA: - dA = 1.0F - Ad; - break; - case GL_CONSTANT_COLOR: - dA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - dA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_CONSTANT_ALPHA: - dA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - dA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_DST_COLOR: - dA = Ad; - break; - case GL_ONE_MINUS_DST_COLOR: - dA = 1.0F - Ad; - break; - default: - /* this should never happen */ - dA = 0.0F; - _mesa_problem(ctx, "Bad blend dest A factor in blend_general_float"); - return; - } - - /* compute the blended RGB */ - switch (ctx->Color.BlendEquationRGB) { - case GL_FUNC_ADD: - r = Rs * sR + Rd * dR; - g = Gs * sG + Gd * dG; - b = Bs * sB + Bd * dB; - a = As * sA + Ad * dA; - break; - case GL_FUNC_SUBTRACT: - r = Rs * sR - Rd * dR; - g = Gs * sG - Gd * dG; - b = Bs * sB - Bd * dB; - a = As * sA - Ad * dA; - break; - case GL_FUNC_REVERSE_SUBTRACT: - r = Rd * dR - Rs * sR; - g = Gd * dG - Gs * sG; - b = Bd * dB - Bs * sB; - a = Ad * dA - As * sA; - break; - case GL_MIN: - r = MIN2( Rd, Rs ); - g = MIN2( Gd, Gs ); - b = MIN2( Bd, Bs ); - break; - case GL_MAX: - r = MAX2( Rd, Rs ); - g = MAX2( Gd, Gs ); - b = MAX2( Bd, Bs ); - break; - default: - /* should never get here */ - r = g = b = 0.0F; /* silence uninitialized var warning */ - _mesa_problem(ctx, "unexpected BlendEquation in blend_general()"); - return; - } - - /* compute the blended alpha */ - switch (ctx->Color.BlendEquationA) { - case GL_FUNC_ADD: - a = As * sA + Ad * dA; - break; - case GL_FUNC_SUBTRACT: - a = As * sA - Ad * dA; - break; - case GL_FUNC_REVERSE_SUBTRACT: - a = Ad * dA - As * sA; - break; - case GL_MIN: - a = MIN2( Ad, As ); - break; - case GL_MAX: - a = MAX2( Ad, As ); - break; - default: - /* should never get here */ - a = 0.0F; /* silence uninitialized var warning */ - _mesa_problem(ctx, "unexpected BlendEquation in blend_general()"); - return; - } - - /* final clamping */ -#if 0 - rgba[i][RCOMP] = MAX2( r, 0.0F ); - rgba[i][GCOMP] = MAX2( g, 0.0F ); - rgba[i][BCOMP] = MAX2( b, 0.0F ); - rgba[i][ACOMP] = CLAMP( a, 0.0F, 1.0F ); -#else - ASSIGN_4V(rgba[i], r, g, b, a); -#endif - } - } -} - - -/** - * Do any blending operation, any chanType. - */ -static void -blend_general(GLcontext *ctx, GLuint n, const GLubyte mask[], - void *src, const void *dst, GLenum chanType) -{ - GLfloat rgbaF[MAX_WIDTH][4], destF[MAX_WIDTH][4]; - - if (chanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = (GLubyte (*)[4]) src; - const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst; - GLuint i; - /* convert ubytes to floats */ - for (i = 0; i < n; i++) { - if (mask[i]) { - rgbaF[i][RCOMP] = UBYTE_TO_FLOAT(rgba[i][RCOMP]); - rgbaF[i][GCOMP] = UBYTE_TO_FLOAT(rgba[i][GCOMP]); - rgbaF[i][BCOMP] = UBYTE_TO_FLOAT(rgba[i][BCOMP]); - rgbaF[i][ACOMP] = UBYTE_TO_FLOAT(rgba[i][ACOMP]); - destF[i][RCOMP] = UBYTE_TO_FLOAT(dest[i][RCOMP]); - destF[i][GCOMP] = UBYTE_TO_FLOAT(dest[i][GCOMP]); - destF[i][BCOMP] = UBYTE_TO_FLOAT(dest[i][BCOMP]); - destF[i][ACOMP] = UBYTE_TO_FLOAT(dest[i][ACOMP]); - } - } - /* do blend */ - blend_general_float(ctx, n, mask, rgbaF, destF, chanType); - /* convert back to ubytes */ - for (i = 0; i < n; i++) { - if (mask[i]) { - UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][RCOMP], rgbaF[i][RCOMP]); - UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][GCOMP], rgbaF[i][GCOMP]); - UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][BCOMP], rgbaF[i][BCOMP]); - UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][ACOMP], rgbaF[i][ACOMP]); - } - } - } - else if (chanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = (GLushort (*)[4]) src; - const GLushort (*dest)[4] = (const GLushort (*)[4]) dst; - GLuint i; - /* convert ushorts to floats */ - for (i = 0; i < n; i++) { - if (mask[i]) { - rgbaF[i][RCOMP] = USHORT_TO_FLOAT(rgba[i][RCOMP]); - rgbaF[i][GCOMP] = USHORT_TO_FLOAT(rgba[i][GCOMP]); - rgbaF[i][BCOMP] = USHORT_TO_FLOAT(rgba[i][BCOMP]); - rgbaF[i][ACOMP] = USHORT_TO_FLOAT(rgba[i][ACOMP]); - destF[i][RCOMP] = USHORT_TO_FLOAT(dest[i][RCOMP]); - destF[i][GCOMP] = USHORT_TO_FLOAT(dest[i][GCOMP]); - destF[i][BCOMP] = USHORT_TO_FLOAT(dest[i][BCOMP]); - destF[i][ACOMP] = USHORT_TO_FLOAT(dest[i][ACOMP]); - } - } - /* do blend */ - blend_general_float(ctx, n, mask, rgbaF, destF, chanType); - /* convert back to ushorts */ - for (i = 0; i < n; i++) { - if (mask[i]) { - UNCLAMPED_FLOAT_TO_USHORT(rgba[i][RCOMP], rgbaF[i][RCOMP]); - UNCLAMPED_FLOAT_TO_USHORT(rgba[i][GCOMP], rgbaF[i][GCOMP]); - UNCLAMPED_FLOAT_TO_USHORT(rgba[i][BCOMP], rgbaF[i][BCOMP]); - UNCLAMPED_FLOAT_TO_USHORT(rgba[i][ACOMP], rgbaF[i][ACOMP]); - } - } - } - else { - blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src, - (GLfloat (*)[4]) dst, chanType); - } -} - - - -/** - * Analyze current blending parameters to pick fastest blending function. - * Result: the ctx->Color.BlendFunc pointer is updated. - */ -void -_swrast_choose_blend_func(GLcontext *ctx, GLenum chanType) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLenum eq = ctx->Color.BlendEquationRGB; - const GLenum srcRGB = ctx->Color.BlendSrcRGB; - const GLenum dstRGB = ctx->Color.BlendDstRGB; - const GLenum srcA = ctx->Color.BlendSrcA; - const GLenum dstA = ctx->Color.BlendDstA; - - if (ctx->Color.BlendEquationRGB != ctx->Color.BlendEquationA) { - swrast->BlendFunc = blend_general; - } - else if (eq == GL_MIN) { - /* Note: GL_MIN ignores the blending weight factors */ -#if defined(USE_MMX_ASM) - if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) { - swrast->BlendFunc = _mesa_mmx_blend_min; - } - else -#endif - swrast->BlendFunc = blend_min; - } - else if (eq == GL_MAX) { - /* Note: GL_MAX ignores the blending weight factors */ -#if defined(USE_MMX_ASM) - if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) { - swrast->BlendFunc = _mesa_mmx_blend_max; - } - else -#endif - swrast->BlendFunc = blend_max; - } - else if (srcRGB != srcA || dstRGB != dstA) { - swrast->BlendFunc = blend_general; - } - else if (eq == GL_FUNC_ADD && srcRGB == GL_SRC_ALPHA - && dstRGB == GL_ONE_MINUS_SRC_ALPHA) { -#if defined(USE_MMX_ASM) - if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) { - swrast->BlendFunc = _mesa_mmx_blend_transparency; - } - else -#endif - { - if (chanType == GL_UNSIGNED_BYTE) - swrast->BlendFunc = blend_transparency_ubyte; - else if (chanType == GL_UNSIGNED_SHORT) - swrast->BlendFunc = blend_transparency_ushort; - else - swrast->BlendFunc = blend_transparency_float; - } - } - else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ONE) { -#if defined(USE_MMX_ASM) - if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) { - swrast->BlendFunc = _mesa_mmx_blend_add; - } - else -#endif - swrast->BlendFunc = blend_add; - } - else if (((eq == GL_FUNC_ADD || eq == GL_FUNC_REVERSE_SUBTRACT) - && (srcRGB == GL_ZERO && dstRGB == GL_SRC_COLOR)) - || - ((eq == GL_FUNC_ADD || eq == GL_FUNC_SUBTRACT) - && (srcRGB == GL_DST_COLOR && dstRGB == GL_ZERO))) { -#if defined(USE_MMX_ASM) - if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) { - swrast->BlendFunc = _mesa_mmx_blend_modulate; - } - else -#endif - swrast->BlendFunc = blend_modulate; - } - else if (eq == GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) { - swrast->BlendFunc = blend_noop; - } - else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) { - swrast->BlendFunc = blend_replace; - } - else { - swrast->BlendFunc = blend_general; - } -} - - - -/** - * Apply the blending operator to a span of pixels. - * We can handle horizontal runs of pixels (spans) or arrays of x/y - * pixel coordinates. - */ -void -_swrast_blend_span(GLcontext *ctx, struct gl_renderbuffer *rb, SWspan *span) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - void *rbPixels; - - ASSERT(span->end <= MAX_WIDTH); - ASSERT(span->arrayMask & SPAN_RGBA); - ASSERT(rb->DataType == span->array->ChanType); - ASSERT(!ctx->Color._LogicOpEnabled); - - rbPixels = _swrast_get_dest_rgba(ctx, rb, span); - - swrast->BlendFunc(ctx, span->end, span->array->mask, - span->array->rgba, rbPixels, span->array->ChanType); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file swrast/s_blend.c
+ * \brief software blending.
+ * \author Brian Paul
+ *
+ * Only a few blend modes have been optimized (min, max, transparency, add)
+ * more optimized cases can easily be added if needed.
+ * Celestia uses glBlendFunc(GL_SRC_ALPHA, GL_ONE), for example.
+ */
+
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_span.h"
+
+
+#if defined(USE_MMX_ASM)
+#include "x86/mmx.h"
+#include "x86/common_x86_asm.h"
+#define _BLENDAPI _ASMAPI
+#else
+#define _BLENDAPI
+#endif
+
+
+/**
+ * Integer divide by 255
+ * Declare "int divtemp" before using.
+ * This satisfies Glean and should be reasonably fast.
+ * Contributed by Nathan Hand.
+ */
+#define DIV255(X) (divtemp = (X), ((divtemp << 8) + divtemp + 256) >> 16)
+
+
+
+/**
+ * Special case for glBlendFunc(GL_ZERO, GL_ONE).
+ * No-op means the framebuffer values remain unchanged.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_noop(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLint bytes;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_ZERO);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE);
+ (void) ctx;
+
+ /* just memcpy */
+ if (chanType == GL_UNSIGNED_BYTE)
+ bytes = 4 * n * sizeof(GLubyte);
+ else if (chanType == GL_UNSIGNED_SHORT)
+ bytes = 4 * n * sizeof(GLushort);
+ else
+ bytes = 4 * n * sizeof(GLfloat);
+
+ memcpy(src, dst, bytes);
+}
+
+
+/**
+ * Special case for glBlendFunc(GL_ONE, GL_ZERO)
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_replace(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_ONE);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ZERO);
+ (void) ctx;
+ (void) n;
+ (void) mask;
+ (void) src;
+ (void) dst;
+}
+
+
+/**
+ * Common transparency blending mode:
+ * glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).
+ */
+static void _BLENDAPI
+blend_transparency_ubyte(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_UNSIGNED_BYTE);
+
+ (void) ctx;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ const GLint t = rgba[i][ACOMP]; /* t is in [0, 255] */
+ if (t == 0) {
+ /* 0% alpha */
+ COPY_4UBV(rgba[i], dest[i]);
+ }
+ else if (t != 255) {
+ GLint divtemp;
+ const GLint r = DIV255((rgba[i][RCOMP] - dest[i][RCOMP]) * t) + dest[i][RCOMP];
+ const GLint g = DIV255((rgba[i][GCOMP] - dest[i][GCOMP]) * t) + dest[i][GCOMP];
+ const GLint b = DIV255((rgba[i][BCOMP] - dest[i][BCOMP]) * t) + dest[i][BCOMP];
+ const GLint a = DIV255((rgba[i][ACOMP] - dest[i][ACOMP]) * t) + dest[i][ACOMP];
+ ASSERT(r <= 255);
+ ASSERT(g <= 255);
+ ASSERT(b <= 255);
+ ASSERT(a <= 255);
+ rgba[i][RCOMP] = (GLubyte) r;
+ rgba[i][GCOMP] = (GLubyte) g;
+ rgba[i][BCOMP] = (GLubyte) b;
+ rgba[i][ACOMP] = (GLubyte) a;
+ }
+ }
+ }
+}
+
+
+static void _BLENDAPI
+blend_transparency_ushort(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_UNSIGNED_SHORT);
+
+ (void) ctx;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ const GLint t = rgba[i][ACOMP];
+ if (t == 0) {
+ /* 0% alpha */
+ COPY_4V(rgba[i], dest[i]);
+ }
+ else if (t != 65535) {
+ const GLfloat tt = (GLfloat) t / 65535.0F;
+ GLushort r = (GLushort) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);
+ GLushort g = (GLushort) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);
+ GLushort b = (GLushort) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);
+ GLushort a = (GLushort) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);
+ ASSIGN_4V(rgba[i], r, g, b, a);
+ }
+ }
+ }
+}
+
+
+static void _BLENDAPI
+blend_transparency_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_FLOAT);
+
+ (void) ctx;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ const GLfloat t = rgba[i][ACOMP]; /* t in [0, 1] */
+ if (t == 0.0F) {
+ /* 0% alpha */
+ COPY_4V(rgba[i], dest[i]);
+ }
+ else if (t != 1.0F) {
+ GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * t + dest[i][RCOMP];
+ GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * t + dest[i][GCOMP];
+ GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * t + dest[i][BCOMP];
+ GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * t + dest[i][ACOMP];
+ ASSIGN_4V(rgba[i], r, g, b, a);
+ }
+ }
+ }
+}
+
+
+
+/**
+ * Add src and dest: glBlendFunc(GL_ONE, GL_ONE).
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_add(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_ONE);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE);
+ (void) ctx;
+
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+ GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+ GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+ GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+ rgba[i][RCOMP] = (GLubyte) MIN2( r, 255 );
+ rgba[i][GCOMP] = (GLubyte) MIN2( g, 255 );
+ rgba[i][BCOMP] = (GLubyte) MIN2( b, 255 );
+ rgba[i][ACOMP] = (GLubyte) MIN2( a, 255 );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+ GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+ GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+ GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+ rgba[i][RCOMP] = (GLshort) MIN2( r, 255 );
+ rgba[i][GCOMP] = (GLshort) MIN2( g, 255 );
+ rgba[i][BCOMP] = (GLshort) MIN2( b, 255 );
+ rgba[i][ACOMP] = (GLshort) MIN2( a, 255 );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ /* don't RGB clamp to max */
+ rgba[i][RCOMP] += dest[i][RCOMP];
+ rgba[i][GCOMP] += dest[i][GCOMP];
+ rgba[i][BCOMP] += dest[i][BCOMP];
+ rgba[i][ACOMP] += dest[i][ACOMP];
+ }
+ }
+ }
+}
+
+
+
+/**
+ * Blend min function.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_min(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLuint i;
+ ASSERT(ctx->Color.BlendEquationRGB == GL_MIN);
+ ASSERT(ctx->Color.BlendEquationA == GL_MIN);
+ (void) ctx;
+
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+}
+
+
+/**
+ * Blend max function.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_max(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLuint i;
+ ASSERT(ctx->Color.BlendEquationRGB == GL_MAX);
+ ASSERT(ctx->Color.BlendEquationA == GL_MAX);
+ (void) ctx;
+
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+}
+
+
+
+/**
+ * Modulate: result = src * dest
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_modulate(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLuint i;
+ (void) ctx;
+
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint divtemp;
+ rgba[i][RCOMP] = DIV255(rgba[i][RCOMP] * dest[i][RCOMP]);
+ rgba[i][GCOMP] = DIV255(rgba[i][GCOMP] * dest[i][GCOMP]);
+ rgba[i][BCOMP] = DIV255(rgba[i][BCOMP] * dest[i][BCOMP]);
+ rgba[i][ACOMP] = DIV255(rgba[i][ACOMP] * dest[i][ACOMP]);
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;
+ rgba[i][GCOMP] = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;
+ rgba[i][BCOMP] = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;
+ rgba[i][ACOMP] = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP];
+ rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP];
+ rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP];
+ rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP];
+ }
+ }
+ }
+}
+
+
+/**
+ * Do any blending operation, using floating point.
+ * \param n number of pixels
+ * \param mask fragment writemask array
+ * \param rgba array of incoming (and modified) pixels
+ * \param dest array of pixels from the dest color buffer
+ */
+static void
+blend_general_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLfloat rgba[][4], GLfloat dest[][4],
+ GLenum chanType)
+{
+ GLuint i;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ /* Incoming/source Color */
+ const GLfloat Rs = rgba[i][RCOMP];
+ const GLfloat Gs = rgba[i][GCOMP];
+ const GLfloat Bs = rgba[i][BCOMP];
+ const GLfloat As = rgba[i][ACOMP];
+
+ /* Frame buffer/dest color */
+ const GLfloat Rd = dest[i][RCOMP];
+ const GLfloat Gd = dest[i][GCOMP];
+ const GLfloat Bd = dest[i][BCOMP];
+ const GLfloat Ad = dest[i][ACOMP];
+
+ GLfloat sR, sG, sB, sA; /* Source factor */
+ GLfloat dR, dG, dB, dA; /* Dest factor */
+ GLfloat r, g, b, a; /* result color */
+
+ /* XXX for the case of constant blend terms we could init
+ * the sX and dX variables just once before the loop.
+ */
+
+ /* Source RGB factor */
+ switch (ctx->Color.BlendSrcRGB) {
+ case GL_ZERO:
+ sR = sG = sB = 0.0F;
+ break;
+ case GL_ONE:
+ sR = sG = sB = 1.0F;
+ break;
+ case GL_DST_COLOR:
+ sR = Rd;
+ sG = Gd;
+ sB = Bd;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ sR = 1.0F - Rd;
+ sG = 1.0F - Gd;
+ sB = 1.0F - Bd;
+ break;
+ case GL_SRC_ALPHA:
+ sR = sG = sB = As;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ sR = sG = sB = 1.0F - As;
+ break;
+ case GL_DST_ALPHA:
+ sR = sG = sB = Ad;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ sR = sG = sB = 1.0F - Ad;
+ break;
+ case GL_SRC_ALPHA_SATURATE:
+ if (As < 1.0F - Ad) {
+ sR = sG = sB = As;
+ }
+ else {
+ sR = sG = sB = 1.0F - Ad;
+ }
+ break;
+ case GL_CONSTANT_COLOR:
+ sR = ctx->Color.BlendColor[0];
+ sG = ctx->Color.BlendColor[1];
+ sB = ctx->Color.BlendColor[2];
+ break;
+ case GL_ONE_MINUS_CONSTANT_COLOR:
+ sR = 1.0F - ctx->Color.BlendColor[0];
+ sG = 1.0F - ctx->Color.BlendColor[1];
+ sB = 1.0F - ctx->Color.BlendColor[2];
+ break;
+ case GL_CONSTANT_ALPHA:
+ sR = sG = sB = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_ALPHA:
+ sR = sG = sB = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_SRC_COLOR:
+ sR = Rs;
+ sG = Gs;
+ sB = Bs;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ sR = 1.0F - Rs;
+ sG = 1.0F - Gs;
+ sB = 1.0F - Bs;
+ break;
+ default:
+ /* this should never happen */
+ _mesa_problem(ctx, "Bad blend source RGB factor in blend_general_float");
+ return;
+ }
+
+ /* Source Alpha factor */
+ switch (ctx->Color.BlendSrcA) {
+ case GL_ZERO:
+ sA = 0.0F;
+ break;
+ case GL_ONE:
+ sA = 1.0F;
+ break;
+ case GL_DST_COLOR:
+ sA = Ad;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ sA = 1.0F - Ad;
+ break;
+ case GL_SRC_ALPHA:
+ sA = As;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ sA = 1.0F - As;
+ break;
+ case GL_DST_ALPHA:
+ sA = Ad;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ sA = 1.0F - Ad;
+ break;
+ case GL_SRC_ALPHA_SATURATE:
+ sA = 1.0;
+ break;
+ case GL_CONSTANT_COLOR:
+ sA = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_COLOR:
+ sA = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_CONSTANT_ALPHA:
+ sA = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_ALPHA:
+ sA = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_SRC_COLOR:
+ sA = As;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ sA = 1.0F - As;
+ break;
+ default:
+ /* this should never happen */
+ sA = 0.0F;
+ _mesa_problem(ctx, "Bad blend source A factor in blend_general_float");
+ return;
+ }
+
+ /* Dest RGB factor */
+ switch (ctx->Color.BlendDstRGB) {
+ case GL_ZERO:
+ dR = dG = dB = 0.0F;
+ break;
+ case GL_ONE:
+ dR = dG = dB = 1.0F;
+ break;
+ case GL_SRC_COLOR:
+ dR = Rs;
+ dG = Gs;
+ dB = Bs;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ dR = 1.0F - Rs;
+ dG = 1.0F - Gs;
+ dB = 1.0F - Bs;
+ break;
+ case GL_SRC_ALPHA:
+ dR = dG = dB = As;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ dR = dG = dB = 1.0F - As;
+ break;
+ case GL_DST_ALPHA:
+ dR = dG = dB = Ad;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ dR = dG = dB = 1.0F - Ad;
+ break;
+ case GL_CONSTANT_COLOR:
+ dR = ctx->Color.BlendColor[0];
+ dG = ctx->Color.BlendColor[1];
+ dB = ctx->Color.BlendColor[2];
+ break;
+ case GL_ONE_MINUS_CONSTANT_COLOR:
+ dR = 1.0F - ctx->Color.BlendColor[0];
+ dG = 1.0F - ctx->Color.BlendColor[1];
+ dB = 1.0F - ctx->Color.BlendColor[2];
+ break;
+ case GL_CONSTANT_ALPHA:
+ dR = dG = dB = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_ALPHA:
+ dR = dG = dB = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_DST_COLOR:
+ dR = Rd;
+ dG = Gd;
+ dB = Bd;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ dR = 1.0F - Rd;
+ dG = 1.0F - Gd;
+ dB = 1.0F - Bd;
+ break;
+ default:
+ /* this should never happen */
+ dR = dG = dB = 0.0F;
+ _mesa_problem(ctx, "Bad blend dest RGB factor in blend_general_float");
+ return;
+ }
+
+ /* Dest Alpha factor */
+ switch (ctx->Color.BlendDstA) {
+ case GL_ZERO:
+ dA = 0.0F;
+ break;
+ case GL_ONE:
+ dA = 1.0F;
+ break;
+ case GL_SRC_COLOR:
+ dA = As;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ dA = 1.0F - As;
+ break;
+ case GL_SRC_ALPHA:
+ dA = As;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ dA = 1.0F - As;
+ break;
+ case GL_DST_ALPHA:
+ dA = Ad;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ dA = 1.0F - Ad;
+ break;
+ case GL_CONSTANT_COLOR:
+ dA = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_COLOR:
+ dA = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_CONSTANT_ALPHA:
+ dA = ctx->Color.BlendColor[3];
+ break;
+ case GL_ONE_MINUS_CONSTANT_ALPHA:
+ dA = 1.0F - ctx->Color.BlendColor[3];
+ break;
+ case GL_DST_COLOR:
+ dA = Ad;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ dA = 1.0F - Ad;
+ break;
+ default:
+ /* this should never happen */
+ dA = 0.0F;
+ _mesa_problem(ctx, "Bad blend dest A factor in blend_general_float");
+ return;
+ }
+
+ /* compute the blended RGB */
+ switch (ctx->Color.BlendEquationRGB) {
+ case GL_FUNC_ADD:
+ r = Rs * sR + Rd * dR;
+ g = Gs * sG + Gd * dG;
+ b = Bs * sB + Bd * dB;
+ a = As * sA + Ad * dA;
+ break;
+ case GL_FUNC_SUBTRACT:
+ r = Rs * sR - Rd * dR;
+ g = Gs * sG - Gd * dG;
+ b = Bs * sB - Bd * dB;
+ a = As * sA - Ad * dA;
+ break;
+ case GL_FUNC_REVERSE_SUBTRACT:
+ r = Rd * dR - Rs * sR;
+ g = Gd * dG - Gs * sG;
+ b = Bd * dB - Bs * sB;
+ a = Ad * dA - As * sA;
+ break;
+ case GL_MIN:
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ break;
+ case GL_MAX:
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ break;
+ default:
+ /* should never get here */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ return;
+ }
+
+ /* compute the blended alpha */
+ switch (ctx->Color.BlendEquationA) {
+ case GL_FUNC_ADD:
+ a = As * sA + Ad * dA;
+ break;
+ case GL_FUNC_SUBTRACT:
+ a = As * sA - Ad * dA;
+ break;
+ case GL_FUNC_REVERSE_SUBTRACT:
+ a = Ad * dA - As * sA;
+ break;
+ case GL_MIN:
+ a = MIN2( Ad, As );
+ break;
+ case GL_MAX:
+ a = MAX2( Ad, As );
+ break;
+ default:
+ /* should never get here */
+ a = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ return;
+ }
+
+ /* final clamping */
+#if 0
+ rgba[i][RCOMP] = MAX2( r, 0.0F );
+ rgba[i][GCOMP] = MAX2( g, 0.0F );
+ rgba[i][BCOMP] = MAX2( b, 0.0F );
+ rgba[i][ACOMP] = CLAMP( a, 0.0F, 1.0F );
+#else
+ ASSIGN_4V(rgba[i], r, g, b, a);
+#endif
+ }
+ }
+}
+
+
+/**
+ * Do any blending operation, any chanType.
+ */
+static void
+blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ void *src, const void *dst, GLenum chanType)
+{
+ GLfloat (*rgbaF)[4], (*destF)[4];
+
+ rgbaF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
+ destF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
+ if (!rgbaF || !destF) {
+ free(rgbaF);
+ free(destF);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "blending");
+ return;
+ }
+
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ GLuint i;
+ /* convert ubytes to floats */
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ rgbaF[i][RCOMP] = UBYTE_TO_FLOAT(rgba[i][RCOMP]);
+ rgbaF[i][GCOMP] = UBYTE_TO_FLOAT(rgba[i][GCOMP]);
+ rgbaF[i][BCOMP] = UBYTE_TO_FLOAT(rgba[i][BCOMP]);
+ rgbaF[i][ACOMP] = UBYTE_TO_FLOAT(rgba[i][ACOMP]);
+ destF[i][RCOMP] = UBYTE_TO_FLOAT(dest[i][RCOMP]);
+ destF[i][GCOMP] = UBYTE_TO_FLOAT(dest[i][GCOMP]);
+ destF[i][BCOMP] = UBYTE_TO_FLOAT(dest[i][BCOMP]);
+ destF[i][ACOMP] = UBYTE_TO_FLOAT(dest[i][ACOMP]);
+ }
+ }
+ /* do blend */
+ blend_general_float(ctx, n, mask, rgbaF, destF, chanType);
+ /* convert back to ubytes */
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][RCOMP], rgbaF[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][GCOMP], rgbaF[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][BCOMP], rgbaF[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][ACOMP], rgbaF[i][ACOMP]);
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ GLuint i;
+ /* convert ushorts to floats */
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ rgbaF[i][RCOMP] = USHORT_TO_FLOAT(rgba[i][RCOMP]);
+ rgbaF[i][GCOMP] = USHORT_TO_FLOAT(rgba[i][GCOMP]);
+ rgbaF[i][BCOMP] = USHORT_TO_FLOAT(rgba[i][BCOMP]);
+ rgbaF[i][ACOMP] = USHORT_TO_FLOAT(rgba[i][ACOMP]);
+ destF[i][RCOMP] = USHORT_TO_FLOAT(dest[i][RCOMP]);
+ destF[i][GCOMP] = USHORT_TO_FLOAT(dest[i][GCOMP]);
+ destF[i][BCOMP] = USHORT_TO_FLOAT(dest[i][BCOMP]);
+ destF[i][ACOMP] = USHORT_TO_FLOAT(dest[i][ACOMP]);
+ }
+ }
+ /* do blend */
+ blend_general_float(ctx, n, mask, rgbaF, destF, chanType);
+ /* convert back to ushorts */
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ UNCLAMPED_FLOAT_TO_USHORT(rgba[i][RCOMP], rgbaF[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(rgba[i][GCOMP], rgbaF[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(rgba[i][BCOMP], rgbaF[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(rgba[i][ACOMP], rgbaF[i][ACOMP]);
+ }
+ }
+ }
+ else {
+ blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src,
+ (GLfloat (*)[4]) dst, chanType);
+ }
+
+ free(rgbaF);
+ free(destF);
+}
+
+
+
+/**
+ * Analyze current blending parameters to pick fastest blending function.
+ * Result: the ctx->Color.BlendFunc pointer is updated.
+ */
+void
+_swrast_choose_blend_func(struct gl_context *ctx, GLenum chanType)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLenum eq = ctx->Color.BlendEquationRGB;
+ const GLenum srcRGB = ctx->Color.BlendSrcRGB;
+ const GLenum dstRGB = ctx->Color.BlendDstRGB;
+ const GLenum srcA = ctx->Color.BlendSrcA;
+ const GLenum dstA = ctx->Color.BlendDstA;
+
+ if (ctx->Color.BlendEquationRGB != ctx->Color.BlendEquationA) {
+ swrast->BlendFunc = blend_general;
+ }
+ else if (eq == GL_MIN) {
+ /* Note: GL_MIN ignores the blending weight factors */
+#if defined(USE_MMX_ASM)
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+ swrast->BlendFunc = _mesa_mmx_blend_min;
+ }
+ else
+#endif
+ swrast->BlendFunc = blend_min;
+ }
+ else if (eq == GL_MAX) {
+ /* Note: GL_MAX ignores the blending weight factors */
+#if defined(USE_MMX_ASM)
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+ swrast->BlendFunc = _mesa_mmx_blend_max;
+ }
+ else
+#endif
+ swrast->BlendFunc = blend_max;
+ }
+ else if (srcRGB != srcA || dstRGB != dstA) {
+ swrast->BlendFunc = blend_general;
+ }
+ else if (eq == GL_FUNC_ADD && srcRGB == GL_SRC_ALPHA
+ && dstRGB == GL_ONE_MINUS_SRC_ALPHA) {
+#if defined(USE_MMX_ASM)
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+ swrast->BlendFunc = _mesa_mmx_blend_transparency;
+ }
+ else
+#endif
+ {
+ if (chanType == GL_UNSIGNED_BYTE)
+ swrast->BlendFunc = blend_transparency_ubyte;
+ else if (chanType == GL_UNSIGNED_SHORT)
+ swrast->BlendFunc = blend_transparency_ushort;
+ else
+ swrast->BlendFunc = blend_transparency_float;
+ }
+ }
+ else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ONE) {
+#if defined(USE_MMX_ASM)
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+ swrast->BlendFunc = _mesa_mmx_blend_add;
+ }
+ else
+#endif
+ swrast->BlendFunc = blend_add;
+ }
+ else if (((eq == GL_FUNC_ADD || eq == GL_FUNC_REVERSE_SUBTRACT)
+ && (srcRGB == GL_ZERO && dstRGB == GL_SRC_COLOR))
+ ||
+ ((eq == GL_FUNC_ADD || eq == GL_FUNC_SUBTRACT)
+ && (srcRGB == GL_DST_COLOR && dstRGB == GL_ZERO))) {
+#if defined(USE_MMX_ASM)
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+ swrast->BlendFunc = _mesa_mmx_blend_modulate;
+ }
+ else
+#endif
+ swrast->BlendFunc = blend_modulate;
+ }
+ else if (eq == GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
+ swrast->BlendFunc = blend_noop;
+ }
+ else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
+ swrast->BlendFunc = blend_replace;
+ }
+ else {
+ swrast->BlendFunc = blend_general;
+ }
+}
+
+
+
+/**
+ * Apply the blending operator to a span of pixels.
+ * We can handle horizontal runs of pixels (spans) or arrays of x/y
+ * pixel coordinates.
+ */
+void
+_swrast_blend_span(struct gl_context *ctx, struct gl_renderbuffer *rb, SWspan *span)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ void *rbPixels;
+
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(rb->DataType == span->array->ChanType);
+ ASSERT(!ctx->Color._LogicOpEnabled);
+
+ rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
+
+ swrast->BlendFunc(ctx, span->end, span->array->mask,
+ span->array->rgba, rbPixels, span->array->ChanType);
+}
diff --git a/mesalib/src/mesa/swrast/s_blend.h b/mesalib/src/mesa/swrast/s_blend.h index 9cedde3bf..8ecff52cf 100644 --- a/mesalib/src/mesa/swrast/s_blend.h +++ b/mesalib/src/mesa/swrast/s_blend.h @@ -1,42 +1,45 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_BLEND_H -#define S_BLEND_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern void -_swrast_blend_span(GLcontext *ctx, struct gl_renderbuffer *rb, SWspan *span); - - -extern void -_swrast_choose_blend_func(GLcontext *ctx, GLenum chanType); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_BLEND_H
+#define S_BLEND_H
+
+
+#include "main/glheader.h"
+#include "s_span.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+extern void
+_swrast_blend_span(struct gl_context *ctx, struct gl_renderbuffer *rb, SWspan *span);
+
+
+extern void
+_swrast_choose_blend_func(struct gl_context *ctx, GLenum chanType);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_blit.c b/mesalib/src/mesa/swrast/s_blit.c index 753f3136f..2dd11399f 100644 --- a/mesalib/src/mesa/swrast/s_blit.c +++ b/mesalib/src/mesa/swrast/s_blit.c @@ -1,619 +1,619 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/condrender.h" -#include "main/image.h" -#include "main/macros.h" -#include "s_context.h" - - -#define ABS(X) ((X) < 0 ? -(X) : (X)) - - -/** - * Generate a row resampler function for GL_NEAREST mode. - */ -#define RESAMPLE(NAME, PIXELTYPE, SIZE) \ -static void \ -NAME(GLint srcWidth, GLint dstWidth, \ - const GLvoid *srcBuffer, GLvoid *dstBuffer, \ - GLboolean flip) \ -{ \ - const PIXELTYPE *src = (const PIXELTYPE *) srcBuffer;\ - PIXELTYPE *dst = (PIXELTYPE *) dstBuffer; \ - GLint dstCol; \ - \ - if (flip) { \ - for (dstCol = 0; dstCol < dstWidth; dstCol++) { \ - GLint srcCol = (dstCol * srcWidth) / dstWidth; \ - ASSERT(srcCol >= 0); \ - ASSERT(srcCol < srcWidth); \ - srcCol = srcWidth - 1 - srcCol; /* flip */ \ - if (SIZE == 1) { \ - dst[dstCol] = src[srcCol]; \ - } \ - else if (SIZE == 2) { \ - dst[dstCol*2+0] = src[srcCol*2+0]; \ - dst[dstCol*2+1] = src[srcCol*2+1]; \ - } \ - else if (SIZE == 4) { \ - dst[dstCol*4+0] = src[srcCol*4+0]; \ - dst[dstCol*4+1] = src[srcCol*4+1]; \ - dst[dstCol*4+2] = src[srcCol*4+2]; \ - dst[dstCol*4+3] = src[srcCol*4+3]; \ - } \ - } \ - } \ - else { \ - for (dstCol = 0; dstCol < dstWidth; dstCol++) { \ - GLint srcCol = (dstCol * srcWidth) / dstWidth; \ - ASSERT(srcCol >= 0); \ - ASSERT(srcCol < srcWidth); \ - if (SIZE == 1) { \ - dst[dstCol] = src[srcCol]; \ - } \ - else if (SIZE == 2) { \ - dst[dstCol*2+0] = src[srcCol*2+0]; \ - dst[dstCol*2+1] = src[srcCol*2+1]; \ - } \ - else if (SIZE == 4) { \ - dst[dstCol*4+0] = src[srcCol*4+0]; \ - dst[dstCol*4+1] = src[srcCol*4+1]; \ - dst[dstCol*4+2] = src[srcCol*4+2]; \ - dst[dstCol*4+3] = src[srcCol*4+3]; \ - } \ - } \ - } \ -} - -/** - * Resamplers for 1, 2, 4, 8 and 16-byte pixels. - */ -RESAMPLE(resample_row_1, GLubyte, 1) -RESAMPLE(resample_row_2, GLushort, 1) -RESAMPLE(resample_row_4, GLuint, 1) -RESAMPLE(resample_row_8, GLuint, 2) -RESAMPLE(resample_row_16, GLuint, 4) - - -/** - * Blit color, depth or stencil with GL_NEAREST filtering. - */ -static void -blit_nearest(GLcontext *ctx, - GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, - GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, - GLbitfield buffer) -{ - struct gl_renderbuffer *readRb, *drawRb; - - const GLint srcWidth = ABS(srcX1 - srcX0); - const GLint dstWidth = ABS(dstX1 - dstX0); - const GLint srcHeight = ABS(srcY1 - srcY0); - const GLint dstHeight = ABS(dstY1 - dstY0); - - const GLint srcXpos = MIN2(srcX0, srcX1); - const GLint srcYpos = MIN2(srcY0, srcY1); - const GLint dstXpos = MIN2(dstX0, dstX1); - const GLint dstYpos = MIN2(dstY0, dstY1); - - const GLboolean invertX = (srcX1 < srcX0) ^ (dstX1 < dstX0); - const GLboolean invertY = (srcY1 < srcY0) ^ (dstY1 < dstY0); - - GLint dstRow; - - GLint comps, pixelSize; - GLvoid *srcBuffer, *dstBuffer; - GLint prevY = -1; - - typedef void (*resample_func)(GLint srcWidth, GLint dstWidth, - const GLvoid *srcBuffer, GLvoid *dstBuffer, - GLboolean flip); - resample_func resampleRow; - - switch (buffer) { - case GL_COLOR_BUFFER_BIT: - readRb = ctx->ReadBuffer->_ColorReadBuffer; - drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0]; - comps = 4; - break; - case GL_DEPTH_BUFFER_BIT: - readRb = ctx->ReadBuffer->_DepthBuffer; - drawRb = ctx->DrawBuffer->_DepthBuffer; - comps = 1; - break; - case GL_STENCIL_BUFFER_BIT: - readRb = ctx->ReadBuffer->_StencilBuffer; - drawRb = ctx->DrawBuffer->_StencilBuffer; - comps = 1; - break; - default: - _mesa_problem(ctx, "unexpected buffer in blit_nearest()"); - return; - } - - switch (readRb->DataType) { - case GL_UNSIGNED_BYTE: - pixelSize = comps * sizeof(GLubyte); - break; - case GL_UNSIGNED_SHORT: - pixelSize = comps * sizeof(GLushort); - break; - case GL_UNSIGNED_INT: - pixelSize = comps * sizeof(GLuint); - break; - case GL_FLOAT: - pixelSize = comps * sizeof(GLfloat); - break; - default: - _mesa_problem(ctx, "unexpected buffer type (0x%x) in blit_nearest", - readRb->DataType); - return; - } - - /* choose row resampler */ - switch (pixelSize) { - case 1: - resampleRow = resample_row_1; - break; - case 2: - resampleRow = resample_row_2; - break; - case 4: - resampleRow = resample_row_4; - break; - case 8: - resampleRow = resample_row_8; - break; - case 16: - resampleRow = resample_row_16; - break; - default: - _mesa_problem(ctx, "unexpected pixel size (%d) in blit_nearest", - pixelSize); - return; - } - - /* allocate the src/dst row buffers */ - srcBuffer = malloc(pixelSize * srcWidth); - if (!srcBuffer) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - dstBuffer = malloc(pixelSize * dstWidth); - if (!dstBuffer) { - free(srcBuffer); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - - for (dstRow = 0; dstRow < dstHeight; dstRow++) { - const GLint dstY = dstYpos + dstRow; - GLint srcRow = (dstRow * srcHeight) / dstHeight; - GLint srcY; - - ASSERT(srcRow >= 0); - ASSERT(srcRow < srcHeight); - - if (invertY) { - srcRow = srcHeight - 1 - srcRow; - } - - srcY = srcYpos + srcRow; - - /* get pixel row from source and resample to match dest width */ - if (prevY != srcY) { - readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY, srcBuffer); - (*resampleRow)(srcWidth, dstWidth, srcBuffer, dstBuffer, invertX); - prevY = srcY; - } - - /* store pixel row in destination */ - drawRb->PutRow(ctx, drawRb, dstWidth, dstXpos, dstY, dstBuffer, NULL); - } - - free(srcBuffer); - free(dstBuffer); -} - - - -#define LERP(T, A, B) ( (A) + (T) * ((B) - (A)) ) - -static INLINE GLfloat -lerp_2d(GLfloat a, GLfloat b, - GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11) -{ - const GLfloat temp0 = LERP(a, v00, v10); - const GLfloat temp1 = LERP(a, v01, v11); - return LERP(b, temp0, temp1); -} - - -/** - * Bilinear interpolation of two source rows. - * GLubyte pixels. - */ -static void -resample_linear_row_ub(GLint srcWidth, GLint dstWidth, - const GLvoid *srcBuffer0, const GLvoid *srcBuffer1, - GLvoid *dstBuffer, GLboolean flip, GLfloat rowWeight) -{ - const GLubyte (*srcColor0)[4] = (const GLubyte (*)[4]) srcBuffer0; - const GLubyte (*srcColor1)[4] = (const GLubyte (*)[4]) srcBuffer1; - GLubyte (*dstColor)[4] = (GLubyte (*)[4]) dstBuffer; - const GLfloat dstWidthF = (GLfloat) dstWidth; - GLint dstCol; - - for (dstCol = 0; dstCol < dstWidth; dstCol++) { - const GLfloat srcCol = (dstCol * srcWidth) / dstWidthF; - GLint srcCol0 = IFLOOR(srcCol); - GLint srcCol1 = srcCol0 + 1; - GLfloat colWeight = srcCol - srcCol0; /* fractional part of srcCol */ - GLfloat red, green, blue, alpha; - - ASSERT(srcCol0 >= 0); - ASSERT(srcCol0 < srcWidth); - ASSERT(srcCol1 <= srcWidth); - - if (srcCol1 == srcWidth) { - /* last column fudge */ - srcCol1--; - colWeight = 0.0; - } - - if (flip) { - srcCol0 = srcWidth - 1 - srcCol0; - srcCol1 = srcWidth - 1 - srcCol1; - } - - red = lerp_2d(colWeight, rowWeight, - srcColor0[srcCol0][RCOMP], srcColor0[srcCol1][RCOMP], - srcColor1[srcCol0][RCOMP], srcColor1[srcCol1][RCOMP]); - green = lerp_2d(colWeight, rowWeight, - srcColor0[srcCol0][GCOMP], srcColor0[srcCol1][GCOMP], - srcColor1[srcCol0][GCOMP], srcColor1[srcCol1][GCOMP]); - blue = lerp_2d(colWeight, rowWeight, - srcColor0[srcCol0][BCOMP], srcColor0[srcCol1][BCOMP], - srcColor1[srcCol0][BCOMP], srcColor1[srcCol1][BCOMP]); - alpha = lerp_2d(colWeight, rowWeight, - srcColor0[srcCol0][ACOMP], srcColor0[srcCol1][ACOMP], - srcColor1[srcCol0][ACOMP], srcColor1[srcCol1][ACOMP]); - - dstColor[dstCol][RCOMP] = IFLOOR(red); - dstColor[dstCol][GCOMP] = IFLOOR(green); - dstColor[dstCol][BCOMP] = IFLOOR(blue); - dstColor[dstCol][ACOMP] = IFLOOR(alpha); - } -} - - - -/** - * Bilinear filtered blit (color only). - */ -static void -blit_linear(GLcontext *ctx, - GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, - GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1) -{ - struct gl_renderbuffer *readRb = ctx->ReadBuffer->_ColorReadBuffer; - struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0]; - - const GLint srcWidth = ABS(srcX1 - srcX0); - const GLint dstWidth = ABS(dstX1 - dstX0); - const GLint srcHeight = ABS(srcY1 - srcY0); - const GLint dstHeight = ABS(dstY1 - dstY0); - const GLfloat dstHeightF = (GLfloat) dstHeight; - - const GLint srcXpos = MIN2(srcX0, srcX1); - const GLint srcYpos = MIN2(srcY0, srcY1); - const GLint dstXpos = MIN2(dstX0, dstX1); - const GLint dstYpos = MIN2(dstY0, dstY1); - - const GLboolean invertX = (srcX1 < srcX0) ^ (dstX1 < dstX0); - const GLboolean invertY = (srcY1 < srcY0) ^ (dstY1 < dstY0); - - GLint dstRow; - - GLint pixelSize; - GLvoid *srcBuffer0, *srcBuffer1; - GLint srcBufferY0 = -1, srcBufferY1 = -1; - GLvoid *dstBuffer; - - switch (readRb->DataType) { - case GL_UNSIGNED_BYTE: - pixelSize = 4 * sizeof(GLubyte); - break; - case GL_UNSIGNED_SHORT: - pixelSize = 4 * sizeof(GLushort); - break; - case GL_UNSIGNED_INT: - pixelSize = 4 * sizeof(GLuint); - break; - case GL_FLOAT: - pixelSize = 4 * sizeof(GLfloat); - break; - default: - _mesa_problem(ctx, "unexpected buffer type (0x%x) in blit_nearest", - readRb->DataType); - return; - } - - /* Allocate the src/dst row buffers. - * Keep two adjacent src rows around for bilinear sampling. - */ - srcBuffer0 = malloc(pixelSize * srcWidth); - if (!srcBuffer0) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - srcBuffer1 = malloc(pixelSize * srcWidth); - if (!srcBuffer1) { - free(srcBuffer0); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - dstBuffer = malloc(pixelSize * dstWidth); - if (!dstBuffer) { - free(srcBuffer0); - free(srcBuffer1); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - - for (dstRow = 0; dstRow < dstHeight; dstRow++) { - const GLint dstY = dstYpos + dstRow; - const GLfloat srcRow = (dstRow * srcHeight) / dstHeightF; - GLint srcRow0 = IFLOOR(srcRow); - GLint srcRow1 = srcRow0 + 1; - GLfloat rowWeight = srcRow - srcRow0; /* fractional part of srcRow */ - - ASSERT(srcRow >= 0); - ASSERT(srcRow < srcHeight); - - if (srcRow1 == srcHeight) { - /* last row fudge */ - srcRow1 = srcRow0; - rowWeight = 0.0; - } - - if (invertY) { - srcRow0 = srcHeight - 1 - srcRow0; - srcRow1 = srcHeight - 1 - srcRow1; - } - - srcY0 = srcYpos + srcRow0; - srcY1 = srcYpos + srcRow1; - - /* get the two source rows */ - if (srcY0 == srcBufferY0 && srcY1 == srcBufferY1) { - /* use same source row buffers again */ - } - else if (srcY0 == srcBufferY1) { - /* move buffer1 into buffer0 by swapping pointers */ - GLvoid *tmp = srcBuffer0; - srcBuffer0 = srcBuffer1; - srcBuffer1 = tmp; - /* get y1 row */ - readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY1, srcBuffer1); - srcBufferY0 = srcY0; - srcBufferY1 = srcY1; - } - else { - /* get both new rows */ - readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY0, srcBuffer0); - readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY1, srcBuffer1); - srcBufferY0 = srcY0; - srcBufferY1 = srcY1; - } - - if (readRb->DataType == GL_UNSIGNED_BYTE) { - resample_linear_row_ub(srcWidth, dstWidth, srcBuffer0, srcBuffer1, - dstBuffer, invertX, rowWeight); - } - else { - _mesa_problem(ctx, "Unsupported color channel type in sw blit"); - break; - } - - /* store pixel row in destination */ - drawRb->PutRow(ctx, drawRb, dstWidth, dstXpos, dstY, dstBuffer, NULL); - } - - free(srcBuffer0); - free(srcBuffer1); - free(dstBuffer); -} - - -/** - * Simple case: Blit color, depth or stencil with no scaling or flipping. - * XXX we could easily support vertical flipping here. - */ -static void -simple_blit(GLcontext *ctx, - GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, - GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, - GLbitfield buffer) -{ - struct gl_renderbuffer *readRb, *drawRb; - const GLint width = srcX1 - srcX0; - const GLint height = srcY1 - srcY0; - GLint row, srcY, dstY, yStep; - GLint comps, bytesPerRow; - void *rowBuffer; - - /* only one buffer */ - ASSERT(_mesa_bitcount(buffer) == 1); - /* no flipping checks */ - ASSERT(srcX0 < srcX1); - ASSERT(srcY0 < srcY1); - ASSERT(dstX0 < dstX1); - ASSERT(dstY0 < dstY1); - /* size checks */ - ASSERT(srcX1 - srcX0 == dstX1 - dstX0); - ASSERT(srcY1 - srcY0 == dstY1 - dstY0); - - /* determine if copy should be bottom-to-top or top-to-bottom */ - if (srcY0 > dstY0) { - /* src above dst: copy bottom-to-top */ - yStep = 1; - srcY = srcY0; - dstY = dstY0; - } - else { - /* src below dst: copy top-to-bottom */ - yStep = -1; - srcY = srcY1 - 1; - dstY = dstY1 - 1; - } - - switch (buffer) { - case GL_COLOR_BUFFER_BIT: - readRb = ctx->ReadBuffer->_ColorReadBuffer; - drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0]; - comps = 4; - break; - case GL_DEPTH_BUFFER_BIT: - readRb = ctx->ReadBuffer->_DepthBuffer; - drawRb = ctx->DrawBuffer->_DepthBuffer; - comps = 1; - break; - case GL_STENCIL_BUFFER_BIT: - readRb = ctx->ReadBuffer->_StencilBuffer; - drawRb = ctx->DrawBuffer->_StencilBuffer; - comps = 1; - break; - default: - _mesa_problem(ctx, "unexpected buffer in simple_blit()"); - return; - } - - ASSERT(readRb->DataType == drawRb->DataType); - - /* compute bytes per row */ - switch (readRb->DataType) { - case GL_UNSIGNED_BYTE: - bytesPerRow = comps * width * sizeof(GLubyte); - break; - case GL_UNSIGNED_SHORT: - bytesPerRow = comps * width * sizeof(GLushort); - break; - case GL_UNSIGNED_INT: - bytesPerRow = comps * width * sizeof(GLuint); - break; - case GL_FLOAT: - bytesPerRow = comps * width * sizeof(GLfloat); - break; - default: - _mesa_problem(ctx, "unexpected buffer type in simple_blit"); - return; - } - - /* allocate the row buffer */ - rowBuffer = malloc(bytesPerRow); - if (!rowBuffer) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT"); - return; - } - - for (row = 0; row < height; row++) { - readRb->GetRow(ctx, readRb, width, srcX0, srcY, rowBuffer); - drawRb->PutRow(ctx, drawRb, width, dstX0, dstY, rowBuffer, NULL); - srcY += yStep; - dstY += yStep; - } - - free(rowBuffer); -} - - -/** - * Software fallback for glBlitFramebufferEXT(). - */ -void -_swrast_BlitFramebuffer(GLcontext *ctx, - GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, - GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, - GLbitfield mask, GLenum filter) -{ - static const GLbitfield buffers[3] = { - GL_COLOR_BUFFER_BIT, - GL_DEPTH_BUFFER_BIT, - GL_STENCIL_BUFFER_BIT - }; - GLint i; - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't clear */ - - if (!ctx->DrawBuffer->_NumColorDrawBuffers) - return; - - if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1, - &dstX0, &dstY0, &dstX1, &dstY1)) { - return; - } - - swrast_render_start(ctx); - - if (srcX1 - srcX0 == dstX1 - dstX0 && - srcY1 - srcY0 == dstY1 - dstY0 && - srcX0 < srcX1 && - srcY0 < srcY1 && - dstX0 < dstX1 && - dstY0 < dstY1) { - /* no stretching or flipping. - * filter doesn't matter. - */ - for (i = 0; i < 3; i++) { - if (mask & buffers[i]) { - simple_blit(ctx, srcX0, srcY0, srcX1, srcY1, - dstX0, dstY0, dstX1, dstY1, buffers[i]); - } - } - } - else { - if (filter == GL_NEAREST) { - for (i = 0; i < 3; i++) { - if (mask & buffers[i]) { - blit_nearest(ctx, srcX0, srcY0, srcX1, srcY1, - dstX0, dstY0, dstX1, dstY1, buffers[i]); - } - } - } - else { - ASSERT(filter == GL_LINEAR); - if (mask & GL_COLOR_BUFFER_BIT) { /* depth/stencil not allowed */ - blit_linear(ctx, srcX0, srcY0, srcX1, srcY1, - dstX0, dstY0, dstX1, dstY1); - } - } - } - - swrast_render_finish(ctx); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/condrender.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "s_context.h"
+
+
+#define ABS(X) ((X) < 0 ? -(X) : (X))
+
+
+/**
+ * Generate a row resampler function for GL_NEAREST mode.
+ */
+#define RESAMPLE(NAME, PIXELTYPE, SIZE) \
+static void \
+NAME(GLint srcWidth, GLint dstWidth, \
+ const GLvoid *srcBuffer, GLvoid *dstBuffer, \
+ GLboolean flip) \
+{ \
+ const PIXELTYPE *src = (const PIXELTYPE *) srcBuffer;\
+ PIXELTYPE *dst = (PIXELTYPE *) dstBuffer; \
+ GLint dstCol; \
+ \
+ if (flip) { \
+ for (dstCol = 0; dstCol < dstWidth; dstCol++) { \
+ GLint srcCol = (dstCol * srcWidth) / dstWidth; \
+ ASSERT(srcCol >= 0); \
+ ASSERT(srcCol < srcWidth); \
+ srcCol = srcWidth - 1 - srcCol; /* flip */ \
+ if (SIZE == 1) { \
+ dst[dstCol] = src[srcCol]; \
+ } \
+ else if (SIZE == 2) { \
+ dst[dstCol*2+0] = src[srcCol*2+0]; \
+ dst[dstCol*2+1] = src[srcCol*2+1]; \
+ } \
+ else if (SIZE == 4) { \
+ dst[dstCol*4+0] = src[srcCol*4+0]; \
+ dst[dstCol*4+1] = src[srcCol*4+1]; \
+ dst[dstCol*4+2] = src[srcCol*4+2]; \
+ dst[dstCol*4+3] = src[srcCol*4+3]; \
+ } \
+ } \
+ } \
+ else { \
+ for (dstCol = 0; dstCol < dstWidth; dstCol++) { \
+ GLint srcCol = (dstCol * srcWidth) / dstWidth; \
+ ASSERT(srcCol >= 0); \
+ ASSERT(srcCol < srcWidth); \
+ if (SIZE == 1) { \
+ dst[dstCol] = src[srcCol]; \
+ } \
+ else if (SIZE == 2) { \
+ dst[dstCol*2+0] = src[srcCol*2+0]; \
+ dst[dstCol*2+1] = src[srcCol*2+1]; \
+ } \
+ else if (SIZE == 4) { \
+ dst[dstCol*4+0] = src[srcCol*4+0]; \
+ dst[dstCol*4+1] = src[srcCol*4+1]; \
+ dst[dstCol*4+2] = src[srcCol*4+2]; \
+ dst[dstCol*4+3] = src[srcCol*4+3]; \
+ } \
+ } \
+ } \
+}
+
+/**
+ * Resamplers for 1, 2, 4, 8 and 16-byte pixels.
+ */
+RESAMPLE(resample_row_1, GLubyte, 1)
+RESAMPLE(resample_row_2, GLushort, 1)
+RESAMPLE(resample_row_4, GLuint, 1)
+RESAMPLE(resample_row_8, GLuint, 2)
+RESAMPLE(resample_row_16, GLuint, 4)
+
+
+/**
+ * Blit color, depth or stencil with GL_NEAREST filtering.
+ */
+static void
+blit_nearest(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield buffer)
+{
+ struct gl_renderbuffer *readRb, *drawRb;
+
+ const GLint srcWidth = ABS(srcX1 - srcX0);
+ const GLint dstWidth = ABS(dstX1 - dstX0);
+ const GLint srcHeight = ABS(srcY1 - srcY0);
+ const GLint dstHeight = ABS(dstY1 - dstY0);
+
+ const GLint srcXpos = MIN2(srcX0, srcX1);
+ const GLint srcYpos = MIN2(srcY0, srcY1);
+ const GLint dstXpos = MIN2(dstX0, dstX1);
+ const GLint dstYpos = MIN2(dstY0, dstY1);
+
+ const GLboolean invertX = (srcX1 < srcX0) ^ (dstX1 < dstX0);
+ const GLboolean invertY = (srcY1 < srcY0) ^ (dstY1 < dstY0);
+
+ GLint dstRow;
+
+ GLint comps, pixelSize;
+ GLvoid *srcBuffer, *dstBuffer;
+ GLint prevY = -1;
+
+ typedef void (*resample_func)(GLint srcWidth, GLint dstWidth,
+ const GLvoid *srcBuffer, GLvoid *dstBuffer,
+ GLboolean flip);
+ resample_func resampleRow;
+
+ switch (buffer) {
+ case GL_COLOR_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_ColorReadBuffer;
+ drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0];
+ comps = 4;
+ break;
+ case GL_DEPTH_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_DepthBuffer;
+ drawRb = ctx->DrawBuffer->_DepthBuffer;
+ comps = 1;
+ break;
+ case GL_STENCIL_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_StencilBuffer;
+ drawRb = ctx->DrawBuffer->_StencilBuffer;
+ comps = 1;
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected buffer in blit_nearest()");
+ return;
+ }
+
+ switch (readRb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ pixelSize = comps * sizeof(GLubyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ pixelSize = comps * sizeof(GLushort);
+ break;
+ case GL_UNSIGNED_INT:
+ pixelSize = comps * sizeof(GLuint);
+ break;
+ case GL_FLOAT:
+ pixelSize = comps * sizeof(GLfloat);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected buffer type (0x%x) in blit_nearest",
+ readRb->DataType);
+ return;
+ }
+
+ /* choose row resampler */
+ switch (pixelSize) {
+ case 1:
+ resampleRow = resample_row_1;
+ break;
+ case 2:
+ resampleRow = resample_row_2;
+ break;
+ case 4:
+ resampleRow = resample_row_4;
+ break;
+ case 8:
+ resampleRow = resample_row_8;
+ break;
+ case 16:
+ resampleRow = resample_row_16;
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected pixel size (%d) in blit_nearest",
+ pixelSize);
+ return;
+ }
+
+ /* allocate the src/dst row buffers */
+ srcBuffer = malloc(pixelSize * srcWidth);
+ if (!srcBuffer) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+ dstBuffer = malloc(pixelSize * dstWidth);
+ if (!dstBuffer) {
+ free(srcBuffer);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+
+ for (dstRow = 0; dstRow < dstHeight; dstRow++) {
+ const GLint dstY = dstYpos + dstRow;
+ GLint srcRow = (dstRow * srcHeight) / dstHeight;
+ GLint srcY;
+
+ ASSERT(srcRow >= 0);
+ ASSERT(srcRow < srcHeight);
+
+ if (invertY) {
+ srcRow = srcHeight - 1 - srcRow;
+ }
+
+ srcY = srcYpos + srcRow;
+
+ /* get pixel row from source and resample to match dest width */
+ if (prevY != srcY) {
+ readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY, srcBuffer);
+ (*resampleRow)(srcWidth, dstWidth, srcBuffer, dstBuffer, invertX);
+ prevY = srcY;
+ }
+
+ /* store pixel row in destination */
+ drawRb->PutRow(ctx, drawRb, dstWidth, dstXpos, dstY, dstBuffer, NULL);
+ }
+
+ free(srcBuffer);
+ free(dstBuffer);
+}
+
+
+
+#define LERP(T, A, B) ( (A) + (T) * ((B) - (A)) )
+
+static INLINE GLfloat
+lerp_2d(GLfloat a, GLfloat b,
+ GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11)
+{
+ const GLfloat temp0 = LERP(a, v00, v10);
+ const GLfloat temp1 = LERP(a, v01, v11);
+ return LERP(b, temp0, temp1);
+}
+
+
+/**
+ * Bilinear interpolation of two source rows.
+ * GLubyte pixels.
+ */
+static void
+resample_linear_row_ub(GLint srcWidth, GLint dstWidth,
+ const GLvoid *srcBuffer0, const GLvoid *srcBuffer1,
+ GLvoid *dstBuffer, GLboolean flip, GLfloat rowWeight)
+{
+ const GLubyte (*srcColor0)[4] = (const GLubyte (*)[4]) srcBuffer0;
+ const GLubyte (*srcColor1)[4] = (const GLubyte (*)[4]) srcBuffer1;
+ GLubyte (*dstColor)[4] = (GLubyte (*)[4]) dstBuffer;
+ const GLfloat dstWidthF = (GLfloat) dstWidth;
+ GLint dstCol;
+
+ for (dstCol = 0; dstCol < dstWidth; dstCol++) {
+ const GLfloat srcCol = (dstCol * srcWidth) / dstWidthF;
+ GLint srcCol0 = IFLOOR(srcCol);
+ GLint srcCol1 = srcCol0 + 1;
+ GLfloat colWeight = srcCol - srcCol0; /* fractional part of srcCol */
+ GLfloat red, green, blue, alpha;
+
+ ASSERT(srcCol0 >= 0);
+ ASSERT(srcCol0 < srcWidth);
+ ASSERT(srcCol1 <= srcWidth);
+
+ if (srcCol1 == srcWidth) {
+ /* last column fudge */
+ srcCol1--;
+ colWeight = 0.0;
+ }
+
+ if (flip) {
+ srcCol0 = srcWidth - 1 - srcCol0;
+ srcCol1 = srcWidth - 1 - srcCol1;
+ }
+
+ red = lerp_2d(colWeight, rowWeight,
+ srcColor0[srcCol0][RCOMP], srcColor0[srcCol1][RCOMP],
+ srcColor1[srcCol0][RCOMP], srcColor1[srcCol1][RCOMP]);
+ green = lerp_2d(colWeight, rowWeight,
+ srcColor0[srcCol0][GCOMP], srcColor0[srcCol1][GCOMP],
+ srcColor1[srcCol0][GCOMP], srcColor1[srcCol1][GCOMP]);
+ blue = lerp_2d(colWeight, rowWeight,
+ srcColor0[srcCol0][BCOMP], srcColor0[srcCol1][BCOMP],
+ srcColor1[srcCol0][BCOMP], srcColor1[srcCol1][BCOMP]);
+ alpha = lerp_2d(colWeight, rowWeight,
+ srcColor0[srcCol0][ACOMP], srcColor0[srcCol1][ACOMP],
+ srcColor1[srcCol0][ACOMP], srcColor1[srcCol1][ACOMP]);
+
+ dstColor[dstCol][RCOMP] = IFLOOR(red);
+ dstColor[dstCol][GCOMP] = IFLOOR(green);
+ dstColor[dstCol][BCOMP] = IFLOOR(blue);
+ dstColor[dstCol][ACOMP] = IFLOOR(alpha);
+ }
+}
+
+
+
+/**
+ * Bilinear filtered blit (color only).
+ */
+static void
+blit_linear(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1)
+{
+ struct gl_renderbuffer *readRb = ctx->ReadBuffer->_ColorReadBuffer;
+ struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0];
+
+ const GLint srcWidth = ABS(srcX1 - srcX0);
+ const GLint dstWidth = ABS(dstX1 - dstX0);
+ const GLint srcHeight = ABS(srcY1 - srcY0);
+ const GLint dstHeight = ABS(dstY1 - dstY0);
+ const GLfloat dstHeightF = (GLfloat) dstHeight;
+
+ const GLint srcXpos = MIN2(srcX0, srcX1);
+ const GLint srcYpos = MIN2(srcY0, srcY1);
+ const GLint dstXpos = MIN2(dstX0, dstX1);
+ const GLint dstYpos = MIN2(dstY0, dstY1);
+
+ const GLboolean invertX = (srcX1 < srcX0) ^ (dstX1 < dstX0);
+ const GLboolean invertY = (srcY1 < srcY0) ^ (dstY1 < dstY0);
+
+ GLint dstRow;
+
+ GLint pixelSize;
+ GLvoid *srcBuffer0, *srcBuffer1;
+ GLint srcBufferY0 = -1, srcBufferY1 = -1;
+ GLvoid *dstBuffer;
+
+ switch (readRb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ pixelSize = 4 * sizeof(GLubyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ pixelSize = 4 * sizeof(GLushort);
+ break;
+ case GL_UNSIGNED_INT:
+ pixelSize = 4 * sizeof(GLuint);
+ break;
+ case GL_FLOAT:
+ pixelSize = 4 * sizeof(GLfloat);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected buffer type (0x%x) in blit_nearest",
+ readRb->DataType);
+ return;
+ }
+
+ /* Allocate the src/dst row buffers.
+ * Keep two adjacent src rows around for bilinear sampling.
+ */
+ srcBuffer0 = malloc(pixelSize * srcWidth);
+ if (!srcBuffer0) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+ srcBuffer1 = malloc(pixelSize * srcWidth);
+ if (!srcBuffer1) {
+ free(srcBuffer0);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+ dstBuffer = malloc(pixelSize * dstWidth);
+ if (!dstBuffer) {
+ free(srcBuffer0);
+ free(srcBuffer1);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+
+ for (dstRow = 0; dstRow < dstHeight; dstRow++) {
+ const GLint dstY = dstYpos + dstRow;
+ const GLfloat srcRow = (dstRow * srcHeight) / dstHeightF;
+ GLint srcRow0 = IFLOOR(srcRow);
+ GLint srcRow1 = srcRow0 + 1;
+ GLfloat rowWeight = srcRow - srcRow0; /* fractional part of srcRow */
+
+ ASSERT(srcRow >= 0);
+ ASSERT(srcRow < srcHeight);
+
+ if (srcRow1 == srcHeight) {
+ /* last row fudge */
+ srcRow1 = srcRow0;
+ rowWeight = 0.0;
+ }
+
+ if (invertY) {
+ srcRow0 = srcHeight - 1 - srcRow0;
+ srcRow1 = srcHeight - 1 - srcRow1;
+ }
+
+ srcY0 = srcYpos + srcRow0;
+ srcY1 = srcYpos + srcRow1;
+
+ /* get the two source rows */
+ if (srcY0 == srcBufferY0 && srcY1 == srcBufferY1) {
+ /* use same source row buffers again */
+ }
+ else if (srcY0 == srcBufferY1) {
+ /* move buffer1 into buffer0 by swapping pointers */
+ GLvoid *tmp = srcBuffer0;
+ srcBuffer0 = srcBuffer1;
+ srcBuffer1 = tmp;
+ /* get y1 row */
+ readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY1, srcBuffer1);
+ srcBufferY0 = srcY0;
+ srcBufferY1 = srcY1;
+ }
+ else {
+ /* get both new rows */
+ readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY0, srcBuffer0);
+ readRb->GetRow(ctx, readRb, srcWidth, srcXpos, srcY1, srcBuffer1);
+ srcBufferY0 = srcY0;
+ srcBufferY1 = srcY1;
+ }
+
+ if (readRb->DataType == GL_UNSIGNED_BYTE) {
+ resample_linear_row_ub(srcWidth, dstWidth, srcBuffer0, srcBuffer1,
+ dstBuffer, invertX, rowWeight);
+ }
+ else {
+ _mesa_problem(ctx, "Unsupported color channel type in sw blit");
+ break;
+ }
+
+ /* store pixel row in destination */
+ drawRb->PutRow(ctx, drawRb, dstWidth, dstXpos, dstY, dstBuffer, NULL);
+ }
+
+ free(srcBuffer0);
+ free(srcBuffer1);
+ free(dstBuffer);
+}
+
+
+/**
+ * Simple case: Blit color, depth or stencil with no scaling or flipping.
+ * XXX we could easily support vertical flipping here.
+ */
+static void
+simple_blit(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield buffer)
+{
+ struct gl_renderbuffer *readRb, *drawRb;
+ const GLint width = srcX1 - srcX0;
+ const GLint height = srcY1 - srcY0;
+ GLint row, srcY, dstY, yStep;
+ GLint comps, bytesPerRow;
+ void *rowBuffer;
+
+ /* only one buffer */
+ ASSERT(_mesa_bitcount(buffer) == 1);
+ /* no flipping checks */
+ ASSERT(srcX0 < srcX1);
+ ASSERT(srcY0 < srcY1);
+ ASSERT(dstX0 < dstX1);
+ ASSERT(dstY0 < dstY1);
+ /* size checks */
+ ASSERT(srcX1 - srcX0 == dstX1 - dstX0);
+ ASSERT(srcY1 - srcY0 == dstY1 - dstY0);
+
+ /* determine if copy should be bottom-to-top or top-to-bottom */
+ if (srcY0 > dstY0) {
+ /* src above dst: copy bottom-to-top */
+ yStep = 1;
+ srcY = srcY0;
+ dstY = dstY0;
+ }
+ else {
+ /* src below dst: copy top-to-bottom */
+ yStep = -1;
+ srcY = srcY1 - 1;
+ dstY = dstY1 - 1;
+ }
+
+ switch (buffer) {
+ case GL_COLOR_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_ColorReadBuffer;
+ drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0];
+ comps = 4;
+ break;
+ case GL_DEPTH_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_DepthBuffer;
+ drawRb = ctx->DrawBuffer->_DepthBuffer;
+ comps = 1;
+ break;
+ case GL_STENCIL_BUFFER_BIT:
+ readRb = ctx->ReadBuffer->_StencilBuffer;
+ drawRb = ctx->DrawBuffer->_StencilBuffer;
+ comps = 1;
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected buffer in simple_blit()");
+ return;
+ }
+
+ ASSERT(readRb->DataType == drawRb->DataType);
+
+ /* compute bytes per row */
+ switch (readRb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ bytesPerRow = comps * width * sizeof(GLubyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ bytesPerRow = comps * width * sizeof(GLushort);
+ break;
+ case GL_UNSIGNED_INT:
+ bytesPerRow = comps * width * sizeof(GLuint);
+ break;
+ case GL_FLOAT:
+ bytesPerRow = comps * width * sizeof(GLfloat);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected buffer type in simple_blit");
+ return;
+ }
+
+ /* allocate the row buffer */
+ rowBuffer = malloc(bytesPerRow);
+ if (!rowBuffer) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBlitFrameBufferEXT");
+ return;
+ }
+
+ for (row = 0; row < height; row++) {
+ readRb->GetRow(ctx, readRb, width, srcX0, srcY, rowBuffer);
+ drawRb->PutRow(ctx, drawRb, width, dstX0, dstY, rowBuffer, NULL);
+ srcY += yStep;
+ dstY += yStep;
+ }
+
+ free(rowBuffer);
+}
+
+
+/**
+ * Software fallback for glBlitFramebufferEXT().
+ */
+void
+_swrast_BlitFramebuffer(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter)
+{
+ static const GLbitfield buffers[3] = {
+ GL_COLOR_BUFFER_BIT,
+ GL_DEPTH_BUFFER_BIT,
+ GL_STENCIL_BUFFER_BIT
+ };
+ GLint i;
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't clear */
+
+ if (!ctx->DrawBuffer->_NumColorDrawBuffers)
+ return;
+
+ if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
+ &dstX0, &dstY0, &dstX1, &dstY1)) {
+ return;
+ }
+
+ swrast_render_start(ctx);
+
+ if (srcX1 - srcX0 == dstX1 - dstX0 &&
+ srcY1 - srcY0 == dstY1 - dstY0 &&
+ srcX0 < srcX1 &&
+ srcY0 < srcY1 &&
+ dstX0 < dstX1 &&
+ dstY0 < dstY1) {
+ /* no stretching or flipping.
+ * filter doesn't matter.
+ */
+ for (i = 0; i < 3; i++) {
+ if (mask & buffers[i]) {
+ simple_blit(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1, buffers[i]);
+ }
+ }
+ }
+ else {
+ if (filter == GL_NEAREST) {
+ for (i = 0; i < 3; i++) {
+ if (mask & buffers[i]) {
+ blit_nearest(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1, buffers[i]);
+ }
+ }
+ }
+ else {
+ ASSERT(filter == GL_LINEAR);
+ if (mask & GL_COLOR_BUFFER_BIT) { /* depth/stencil not allowed */
+ blit_linear(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1);
+ }
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_clear.c b/mesalib/src/mesa/swrast/s_clear.c index efe500ae2..fac092f1e 100644 --- a/mesalib/src/mesa/swrast/s_clear.c +++ b/mesalib/src/mesa/swrast/s_clear.c @@ -1,230 +1,230 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/condrender.h" -#include "main/macros.h" -#include "main/imports.h" -#include "main/mtypes.h" - -#include "s_accum.h" -#include "s_context.h" -#include "s_depth.h" -#include "s_masking.h" -#include "s_stencil.h" - - -/** - * Clear the color buffer when glColorMask is in effect. - */ -static void -clear_rgba_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint buf) -{ - const GLint x = ctx->DrawBuffer->_Xmin; - const GLint y = ctx->DrawBuffer->_Ymin; - const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - SWspan span; - GLint i; - - ASSERT(rb->PutRow); - - /* Initialize color span with clear color */ - /* XXX optimize for clearcolor == black/zero (bzero) */ - INIT_SPAN(span, GL_BITMAP); - span.end = width; - span.arrayMask = SPAN_RGBA; - span.array->ChanType = rb->DataType; - if (span.array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte clearColor[4]; - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]); - for (i = 0; i < width; i++) { - COPY_4UBV(span.array->rgba[i], clearColor); - } - } - else if (span.array->ChanType == GL_UNSIGNED_SHORT) { - GLushort clearColor[4]; - UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]); - for (i = 0; i < width; i++) { - COPY_4V_CAST(span.array->rgba[i], clearColor, GLchan); - } - } - else { - ASSERT(span.array->ChanType == GL_FLOAT); - for (i = 0; i < width; i++) { - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]); - } - } - - /* Note that masking will change the color values, but only the - * channels for which the write mask is GL_FALSE. The channels - * which which are write-enabled won't get modified. - */ - for (i = 0; i < height; i++) { - span.x = x; - span.y = y + i; - _swrast_mask_rgba_span(ctx, rb, &span, buf); - /* write masked row */ - rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL); - } -} - - -/** - * Clear an rgba color buffer without channel masking. - */ -static void -clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint buf) -{ - const GLint x = ctx->DrawBuffer->_Xmin; - const GLint y = ctx->DrawBuffer->_Ymin; - const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - GLubyte clear8[4]; - GLushort clear16[4]; - GLvoid *clearVal; - GLint i; - - ASSERT(ctx->Color.ColorMask[buf][0] && - ctx->Color.ColorMask[buf][1] && - ctx->Color.ColorMask[buf][2] && - ctx->Color.ColorMask[buf][3]); - - ASSERT(rb->PutMonoRow); - - switch (rb->DataType) { - case GL_UNSIGNED_BYTE: - UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]); - clearVal = clear8; - break; - case GL_UNSIGNED_SHORT: - UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]); - clearVal = clear16; - break; - case GL_FLOAT: - clearVal = ctx->Color.ClearColor; - break; - default: - _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer"); - return; - } - - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL); - } -} - - -/** - * Clear the front/back/left/right/aux color buffers. - * This function is usually only called if the device driver can't - * clear its own color buffers for some reason (such as with masking). - */ -static void -clear_color_buffers(GLcontext *ctx) -{ - GLuint buf; - - for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) { - struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf]; - if (ctx->Color.ColorMask[buf][0] == 0 || - ctx->Color.ColorMask[buf][1] == 0 || - ctx->Color.ColorMask[buf][2] == 0 || - ctx->Color.ColorMask[buf][3] == 0) { - clear_rgba_buffer_with_masking(ctx, rb, buf); - } - else { - clear_rgba_buffer(ctx, rb, buf); - } - } -} - - -/** - * Called via the device driver's ctx->Driver.Clear() function if the - * device driver can't clear one or more of the buffers itself. - * \param buffers bitfield of BUFFER_BIT_* values indicating which - * renderbuffers are to be cleared. - * \param all if GL_TRUE, clear whole buffer, else clear specified region. - */ -void -_swrast_Clear(GLcontext *ctx, GLbitfield buffers) -{ -#ifdef DEBUG_FOO - { - const GLbitfield legalBits = - BUFFER_BIT_FRONT_LEFT | - BUFFER_BIT_FRONT_RIGHT | - BUFFER_BIT_BACK_LEFT | - BUFFER_BIT_BACK_RIGHT | - BUFFER_BIT_DEPTH | - BUFFER_BIT_STENCIL | - BUFFER_BIT_ACCUM | - BUFFER_BIT_AUX0; - assert((buffers & (~legalBits)) == 0); - } -#endif - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't clear */ - - swrast_render_start(ctx); - - /* do software clearing here */ - if (buffers) { - if ((buffers & BUFFER_BITS_COLOR) - && (ctx->DrawBuffer->_NumColorDrawBuffers > 0)) { - clear_color_buffers(ctx); - } - if (buffers & BUFFER_BIT_DEPTH) { - _swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer); - } - if (buffers & BUFFER_BIT_ACCUM) { - _swrast_clear_accum_buffer(ctx, - ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer); - } - if (buffers & BUFFER_BIT_STENCIL) { - _swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer); - } - } - - swrast_render_finish(ctx); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/condrender.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/mtypes.h"
+
+#include "s_accum.h"
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_masking.h"
+#include "s_stencil.h"
+
+
+/**
+ * Clear the color buffer when glColorMask is in effect.
+ */
+static void
+clear_rgba_buffer_with_masking(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint buf)
+{
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint y = ctx->DrawBuffer->_Ymin;
+ const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ SWspan span;
+ GLint i;
+
+ ASSERT(rb->PutRow);
+
+ /* Initialize color span with clear color */
+ /* XXX optimize for clearcolor == black/zero (bzero) */
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_RGBA;
+ span.array->ChanType = rb->DataType;
+ if (span.array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte clearColor[4];
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+ for (i = 0; i < width; i++) {
+ COPY_4UBV(span.array->rgba[i], clearColor);
+ }
+ }
+ else if (span.array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort clearColor[4];
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+ for (i = 0; i < width; i++) {
+ COPY_4V_CAST(span.array->rgba[i], clearColor, GLchan);
+ }
+ }
+ else {
+ ASSERT(span.array->ChanType == GL_FLOAT);
+ for (i = 0; i < width; i++) {
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]);
+ }
+ }
+
+ /* Note that masking will change the color values, but only the
+ * channels for which the write mask is GL_FALSE. The channels
+ * which which are write-enabled won't get modified.
+ */
+ for (i = 0; i < height; i++) {
+ span.x = x;
+ span.y = y + i;
+ _swrast_mask_rgba_span(ctx, rb, &span, buf);
+ /* write masked row */
+ rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL);
+ }
+}
+
+
+/**
+ * Clear an rgba color buffer without channel masking.
+ */
+static void
+clear_rgba_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint buf)
+{
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint y = ctx->DrawBuffer->_Ymin;
+ const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ GLubyte clear8[4];
+ GLushort clear16[4];
+ GLvoid *clearVal;
+ GLint i;
+
+ ASSERT(ctx->Color.ColorMask[buf][0] &&
+ ctx->Color.ColorMask[buf][1] &&
+ ctx->Color.ColorMask[buf][2] &&
+ ctx->Color.ColorMask[buf][3]);
+
+ ASSERT(rb->PutMonoRow);
+
+ switch (rb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]);
+ clearVal = clear8;
+ break;
+ case GL_UNSIGNED_SHORT:
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]);
+ clearVal = clear16;
+ break;
+ case GL_FLOAT:
+ clearVal = ctx->Color.ClearColor;
+ break;
+ default:
+ _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer");
+ return;
+ }
+
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+ }
+}
+
+
+/**
+ * Clear the front/back/left/right/aux color buffers.
+ * This function is usually only called if the device driver can't
+ * clear its own color buffers for some reason (such as with masking).
+ */
+static void
+clear_color_buffers(struct gl_context *ctx)
+{
+ GLuint buf;
+
+ for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
+ if (ctx->Color.ColorMask[buf][0] == 0 ||
+ ctx->Color.ColorMask[buf][1] == 0 ||
+ ctx->Color.ColorMask[buf][2] == 0 ||
+ ctx->Color.ColorMask[buf][3] == 0) {
+ clear_rgba_buffer_with_masking(ctx, rb, buf);
+ }
+ else {
+ clear_rgba_buffer(ctx, rb, buf);
+ }
+ }
+}
+
+
+/**
+ * Called via the device driver's ctx->Driver.Clear() function if the
+ * device driver can't clear one or more of the buffers itself.
+ * \param buffers bitfield of BUFFER_BIT_* values indicating which
+ * renderbuffers are to be cleared.
+ * \param all if GL_TRUE, clear whole buffer, else clear specified region.
+ */
+void
+_swrast_Clear(struct gl_context *ctx, GLbitfield buffers)
+{
+#ifdef DEBUG_FOO
+ {
+ const GLbitfield legalBits =
+ BUFFER_BIT_FRONT_LEFT |
+ BUFFER_BIT_FRONT_RIGHT |
+ BUFFER_BIT_BACK_LEFT |
+ BUFFER_BIT_BACK_RIGHT |
+ BUFFER_BIT_DEPTH |
+ BUFFER_BIT_STENCIL |
+ BUFFER_BIT_ACCUM |
+ BUFFER_BIT_AUX0;
+ assert((buffers & (~legalBits)) == 0);
+ }
+#endif
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't clear */
+
+ swrast_render_start(ctx);
+
+ /* do software clearing here */
+ if (buffers) {
+ if ((buffers & BUFFER_BITS_COLOR)
+ && (ctx->DrawBuffer->_NumColorDrawBuffers > 0)) {
+ clear_color_buffers(ctx);
+ }
+ if (buffers & BUFFER_BIT_DEPTH) {
+ _swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer);
+ }
+ if (buffers & BUFFER_BIT_ACCUM) {
+ _swrast_clear_accum_buffer(ctx,
+ ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ }
+ if (buffers & BUFFER_BIT_STENCIL) {
+ _swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer);
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_context.c b/mesalib/src/mesa/swrast/s_context.c index f76a2b68e..b0c9880b1 100644 --- a/mesalib/src/mesa/swrast/s_context.c +++ b/mesalib/src/mesa/swrast/s_context.c @@ -1,957 +1,957 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - * Authors: - * Keith Whitwell <keith@tungstengraphics.com> - * Brian Paul - */ - -#include "main/imports.h" -#include "main/bufferobj.h" -#include "main/colormac.h" -#include "main/mtypes.h" -#include "main/teximage.h" -#include "program/prog_parameter.h" -#include "program/prog_statevars.h" -#include "swrast.h" -#include "s_blend.h" -#include "s_context.h" -#include "s_lines.h" -#include "s_points.h" -#include "s_span.h" -#include "s_triangle.h" -#include "s_texfilter.h" - - -/** - * Recompute the value of swrast->_RasterMask, etc. according to - * the current context. The _RasterMask field can be easily tested by - * drivers to determine certain basic GL state (does the primitive need - * stenciling, logic-op, fog, etc?). - */ -static void -_swrast_update_rasterflags( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLbitfield rasterMask = 0; - GLuint i; - - if (ctx->Color.AlphaEnabled) rasterMask |= ALPHATEST_BIT; - if (ctx->Color.BlendEnabled) rasterMask |= BLEND_BIT; - if (ctx->Depth.Test) rasterMask |= DEPTH_BIT; - if (swrast->_FogEnabled) rasterMask |= FOG_BIT; - if (ctx->Scissor.Enabled) rasterMask |= CLIP_BIT; - if (ctx->Stencil._Enabled) rasterMask |= STENCIL_BIT; - for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) { - if (!ctx->Color.ColorMask[i][0] || - !ctx->Color.ColorMask[i][1] || - !ctx->Color.ColorMask[i][2] || - !ctx->Color.ColorMask[i][3]) { - rasterMask |= MASKING_BIT; - break; - } - } - if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT; - if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT; - if ( ctx->Viewport.X < 0 - || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width - || ctx->Viewport.Y < 0 - || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) { - rasterMask |= CLIP_BIT; - } - - if (ctx->Query.CurrentOcclusionObject) - rasterMask |= OCCLUSION_BIT; - - - /* If we're not drawing to exactly one color buffer set the - * MULTI_DRAW_BIT flag. Also set it if we're drawing to no - * buffers or the RGBA or CI mask disables all writes. - */ - if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) { - /* more than one color buffer designated for writing (or zero buffers) */ - rasterMask |= MULTI_DRAW_BIT; - } - - for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) { - if (ctx->Color.ColorMask[i][0] + - ctx->Color.ColorMask[i][1] + - ctx->Color.ColorMask[i][2] + - ctx->Color.ColorMask[i][3] == 0) { - rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */ - break; - } - } - - - if (ctx->FragmentProgram._Current) { - rasterMask |= FRAGPROG_BIT; - } - - if (ctx->ATIFragmentShader._Enabled) { - rasterMask |= ATIFRAGSHADER_BIT; - } - -#if CHAN_TYPE == GL_FLOAT - if (ctx->Color.ClampFragmentColor == GL_TRUE) { - rasterMask |= CLAMPING_BIT; - } -#endif - - SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask; -} - - -/** - * Examine polygon cull state to compute the _BackfaceCullSign field. - * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces, - * and 1 if culling front-faces. The Polygon FrontFace state also - * factors in. - */ -static void -_swrast_update_polygon( GLcontext *ctx ) -{ - GLfloat backface_sign; - - if (ctx->Polygon.CullFlag) { - switch (ctx->Polygon.CullFaceMode) { - case GL_BACK: - backface_sign = -1.0F; - break; - case GL_FRONT: - backface_sign = 1.0F; - break; - case GL_FRONT_AND_BACK: - /* fallthrough */ - default: - backface_sign = 0.0F; - } - } - else { - backface_sign = 0.0F; - } - - SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign; - - /* This is for front/back-face determination, but not for culling */ - SWRAST_CONTEXT(ctx)->_BackfaceSign - = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F; -} - - - -/** - * Update the _PreferPixelFog field to indicate if we need to compute - * fog blend factors (from the fog coords) per-fragment. - */ -static void -_swrast_update_fog_hint( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - swrast->_PreferPixelFog = (!swrast->AllowVertexFog || - ctx->FragmentProgram._Current || - (ctx->Hint.Fog == GL_NICEST && - swrast->AllowPixelFog)); -} - - - -/** - * Update the swrast->_TextureCombinePrimary flag. - */ -static void -_swrast_update_texture_env( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint i; - - swrast->_TextureCombinePrimary = GL_FALSE; - - for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { - const struct gl_tex_env_combine_state *combine = - ctx->Texture.Unit[i]._CurrentCombine; - GLuint term; - for (term = 0; term < combine->_NumArgsRGB; term++) { - if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) { - swrast->_TextureCombinePrimary = GL_TRUE; - return; - } - if (combine->SourceA[term] == GL_PRIMARY_COLOR) { - swrast->_TextureCombinePrimary = GL_TRUE; - return; - } - } - } -} - - -/** - * Determine if we can defer texturing/shading until after Z/stencil - * testing. This potentially allows us to skip texturing/shading for - * lots of fragments. - */ -static void -_swrast_update_deferred_texture(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (ctx->Color.AlphaEnabled) { - /* alpha test depends on post-texture/shader colors */ - swrast->_DeferredTexture = GL_FALSE; - } - else { - const struct gl_fragment_program *fprog - = ctx->FragmentProgram._Current; - if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) { - /* Z comes from fragment program/shader */ - swrast->_DeferredTexture = GL_FALSE; - } - else if (fprog && fprog->UsesKill) { - swrast->_DeferredTexture = GL_FALSE; - } - else if (ctx->Query.CurrentOcclusionObject) { - /* occlusion query depends on shader discard/kill results */ - swrast->_DeferredTexture = GL_FALSE; - } - else { - swrast->_DeferredTexture = GL_TRUE; - } - } -} - - -/** - * Update swrast->_FogColor and swrast->_FogEnable values. - */ -static void -_swrast_update_fog_state( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const struct gl_fragment_program *fp = ctx->FragmentProgram._Current; - - /* determine if fog is needed, and if so, which fog mode */ - swrast->_FogEnabled = GL_FALSE; - if (fp && fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB) { - if (fp->FogOption != GL_NONE) { - swrast->_FogEnabled = GL_TRUE; - swrast->_FogMode = fp->FogOption; - } - } - else if (ctx->Fog.Enabled) { - swrast->_FogEnabled = GL_TRUE; - swrast->_FogMode = ctx->Fog.Mode; - } -} - - -/** - * Update state for running fragment programs. Basically, load the - * program parameters with current state values. - */ -static void -_swrast_update_fragment_program(GLcontext *ctx, GLbitfield newState) -{ - const struct gl_fragment_program *fp = ctx->FragmentProgram._Current; - if (fp) { - _mesa_load_state_parameters(ctx, fp->Base.Parameters); - } -} - - -/** - * See if we can do early diffuse+specular (primary+secondary) color - * add per vertex instead of per-fragment. - */ -static void -_swrast_update_specular_vertex_add(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLboolean separateSpecular = ctx->Fog.ColorSumEnabled || - (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR); - - swrast->SpecularVertexAdd = (separateSpecular - && ctx->Texture._EnabledUnits == 0x0 - && !ctx->FragmentProgram._Current - && !ctx->ATIFragmentShader._Enabled); -} - - -#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \ - _NEW_PROGRAM_CONSTANTS | \ - _NEW_TEXTURE | \ - _NEW_HINT | \ - _NEW_POLYGON ) - -/* State referenced by _swrast_choose_triangle, _swrast_choose_line. - */ -#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \ - _NEW_RENDERMODE| \ - _NEW_POLYGON| \ - _NEW_DEPTH| \ - _NEW_STENCIL| \ - _NEW_COLOR| \ - _NEW_TEXTURE| \ - _SWRAST_NEW_RASTERMASK| \ - _NEW_LIGHT| \ - _NEW_FOG | \ - _DD_NEW_SEPARATE_SPECULAR) - -#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \ - _NEW_RENDERMODE| \ - _NEW_LINE| \ - _NEW_TEXTURE| \ - _NEW_LIGHT| \ - _NEW_FOG| \ - _NEW_DEPTH | \ - _DD_NEW_SEPARATE_SPECULAR) - -#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \ - _NEW_RENDERMODE | \ - _NEW_POINT | \ - _NEW_TEXTURE | \ - _NEW_LIGHT | \ - _NEW_FOG | \ - _DD_NEW_SEPARATE_SPECULAR) - -#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE - -#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE - -#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR - - - -/** - * Stub for swrast->Triangle to select a true triangle function - * after a state change. - */ -static void -_swrast_validate_triangle( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2 ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - _swrast_validate_derived( ctx ); - swrast->choose_triangle( ctx ); - ASSERT(swrast->Triangle); - - if (swrast->SpecularVertexAdd) { - /* separate specular color, but no texture */ - swrast->SpecTriangle = swrast->Triangle; - swrast->Triangle = _swrast_add_spec_terms_triangle; - } - - swrast->Triangle( ctx, v0, v1, v2 ); -} - -/** - * Called via swrast->Line. Examine current GL state and choose a software - * line routine. Then call it. - */ -static void -_swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - _swrast_validate_derived( ctx ); - swrast->choose_line( ctx ); - ASSERT(swrast->Line); - - if (swrast->SpecularVertexAdd) { - swrast->SpecLine = swrast->Line; - swrast->Line = _swrast_add_spec_terms_line; - } - - swrast->Line( ctx, v0, v1 ); -} - -/** - * Called via swrast->Point. Examine current GL state and choose a software - * point routine. Then call it. - */ -static void -_swrast_validate_point( GLcontext *ctx, const SWvertex *v0 ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - _swrast_validate_derived( ctx ); - swrast->choose_point( ctx ); - - if (swrast->SpecularVertexAdd) { - swrast->SpecPoint = swrast->Point; - swrast->Point = _swrast_add_spec_terms_point; - } - - swrast->Point( ctx, v0 ); -} - - -/** - * Called via swrast->BlendFunc. Examine GL state to choose a blending - * function, then call it. - */ -static void _ASMAPI -_swrast_validate_blend_func(GLcontext *ctx, GLuint n, const GLubyte mask[], - GLvoid *src, const GLvoid *dst, - GLenum chanType ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - _swrast_validate_derived( ctx ); /* why is this needed? */ - _swrast_choose_blend_func( ctx, chanType ); - - swrast->BlendFunc( ctx, n, mask, src, dst, chanType ); -} - - -/** - * Make sure we have texture image data for all the textures we may need - * for subsequent rendering. - */ -static void -_swrast_validate_texture_images(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint u; - - if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) { - /* no textures enabled, or no way to validate images! */ - return; - } - - for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) { - if (ctx->Texture.Unit[u]._ReallyEnabled) { - struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current; - ASSERT(texObj); - if (texObj) { - GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1; - GLuint face; - for (face = 0; face < numFaces; face++) { - GLint lvl; - for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) { - struct gl_texture_image *texImg = texObj->Image[face][lvl]; - if (texImg && !texImg->Data) { - swrast->ValidateTextureImage(ctx, texObj, face, lvl); - ASSERT(texObj->Image[face][lvl]->Data); - } - } - } - } - } - } -} - - -/** - * Free the texture image data attached to all currently enabled - * textures. Meant to be called by device drivers when transitioning - * from software to hardware rendering. - */ -void -_swrast_eject_texture_images(GLcontext *ctx) -{ - GLuint u; - - if (!ctx->Texture._EnabledUnits) { - /* no textures enabled */ - return; - } - - for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) { - if (ctx->Texture.Unit[u]._ReallyEnabled) { - struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current; - ASSERT(texObj); - if (texObj) { - GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1; - GLuint face; - for (face = 0; face < numFaces; face++) { - GLint lvl; - for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) { - struct gl_texture_image *texImg = texObj->Image[face][lvl]; - if (texImg && texImg->Data) { - _mesa_free_texmemory(texImg->Data); - texImg->Data = NULL; - } - } - } - } - } - } -} - - - -static void -_swrast_sleep( GLcontext *ctx, GLbitfield new_state ) -{ - (void) ctx; (void) new_state; -} - - -static void -_swrast_invalidate_state( GLcontext *ctx, GLbitfield new_state ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint i; - - swrast->NewState |= new_state; - - /* After 10 statechanges without any swrast functions being called, - * put the module to sleep. - */ - if (++swrast->StateChanges > 10) { - swrast->InvalidateState = _swrast_sleep; - swrast->NewState = ~0; - new_state = ~0; - } - - if (new_state & swrast->InvalidateTriangleMask) - swrast->Triangle = _swrast_validate_triangle; - - if (new_state & swrast->InvalidateLineMask) - swrast->Line = _swrast_validate_line; - - if (new_state & swrast->InvalidatePointMask) - swrast->Point = _swrast_validate_point; - - if (new_state & _SWRAST_NEW_BLEND_FUNC) - swrast->BlendFunc = _swrast_validate_blend_func; - - if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC) - for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++) - swrast->TextureSample[i] = NULL; -} - - -void -_swrast_update_texture_samplers(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint u; - - if (!swrast) - return; /* pipe hack */ - - for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) { - const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current; - /* Note: If tObj is NULL, the sample function will be a simple - * function that just returns opaque black (0,0,0,1). - */ - swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj); - } -} - - -/** - * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs, - * swrast->_ActiveAtttribMask. - */ -static void -_swrast_update_active_attribs(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint attribsMask; - - /* - * Compute _ActiveAttribsMask = which fragment attributes are needed. - */ - if (ctx->FragmentProgram._Current) { - /* fragment program/shader */ - attribsMask = ctx->FragmentProgram._Current->Base.InputsRead; - attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */ - } - else if (ctx->ATIFragmentShader._Enabled) { - attribsMask = ~0; /* XXX fix me */ - } - else { - /* fixed function */ - attribsMask = 0x0; - -#if CHAN_TYPE == GL_FLOAT - attribsMask |= FRAG_BIT_COL0; -#endif - - if (ctx->Fog.ColorSumEnabled || - (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) { - attribsMask |= FRAG_BIT_COL1; - } - - if (swrast->_FogEnabled) - attribsMask |= FRAG_BIT_FOGC; - - attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0); - } - - swrast->_ActiveAttribMask = attribsMask; - - /* Update _ActiveAttribs[] list */ - { - GLuint i, num = 0; - for (i = 0; i < FRAG_ATTRIB_MAX; i++) { - if (attribsMask & (1 << i)) { - swrast->_ActiveAttribs[num++] = i; - /* how should this attribute be interpolated? */ - if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1) - swrast->_InterpMode[i] = ctx->Light.ShadeModel; - else - swrast->_InterpMode[i] = GL_SMOOTH; - } - } - swrast->_NumActiveAttribs = num; - } -} - - -void -_swrast_validate_derived( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - if (swrast->NewState) { - if (swrast->NewState & _NEW_POLYGON) - _swrast_update_polygon( ctx ); - - if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM)) - _swrast_update_fog_hint( ctx ); - - if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE) - _swrast_update_texture_env( ctx ); - - if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM)) - _swrast_update_fog_state( ctx ); - - if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM)) - _swrast_update_fragment_program( ctx, swrast->NewState ); - - if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) { - _swrast_update_texture_samplers( ctx ); - _swrast_validate_texture_images(ctx); - } - - if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM)) - _swrast_update_deferred_texture(ctx); - - if (swrast->NewState & _SWRAST_NEW_RASTERMASK) - _swrast_update_rasterflags( ctx ); - - if (swrast->NewState & (_NEW_DEPTH | - _NEW_FOG | - _NEW_LIGHT | - _NEW_PROGRAM | - _NEW_TEXTURE)) - _swrast_update_active_attribs(ctx); - - if (swrast->NewState & (_NEW_FOG | - _NEW_PROGRAM | - _NEW_LIGHT | - _NEW_TEXTURE)) - _swrast_update_specular_vertex_add(ctx); - - swrast->NewState = 0; - swrast->StateChanges = 0; - swrast->InvalidateState = _swrast_invalidate_state; - } -} - -#define SWRAST_DEBUG 0 - -/* Public entrypoints: See also s_accum.c, s_bitmap.c, etc. - */ -void -_swrast_Quad( GLcontext *ctx, - const SWvertex *v0, const SWvertex *v1, - const SWvertex *v2, const SWvertex *v3 ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_Quad\n"); - _swrast_print_vertex( ctx, v0 ); - _swrast_print_vertex( ctx, v1 ); - _swrast_print_vertex( ctx, v2 ); - _swrast_print_vertex( ctx, v3 ); - } - SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 ); - SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 ); -} - -void -_swrast_Triangle( GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2 ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_Triangle\n"); - _swrast_print_vertex( ctx, v0 ); - _swrast_print_vertex( ctx, v1 ); - _swrast_print_vertex( ctx, v2 ); - } - SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 ); -} - -void -_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_Line\n"); - _swrast_print_vertex( ctx, v0 ); - _swrast_print_vertex( ctx, v1 ); - } - SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 ); -} - -void -_swrast_Point( GLcontext *ctx, const SWvertex *v0 ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_Point\n"); - _swrast_print_vertex( ctx, v0 ); - } - SWRAST_CONTEXT(ctx)->Point( ctx, v0 ); -} - -void -_swrast_InvalidateState( GLcontext *ctx, GLbitfield new_state ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_InvalidateState\n"); - } - SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state ); -} - -void -_swrast_ResetLineStipple( GLcontext *ctx ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_ResetLineStipple\n"); - } - SWRAST_CONTEXT(ctx)->StippleCounter = 0; -} - -void -_swrast_SetFacing(GLcontext *ctx, GLuint facing) -{ - SWRAST_CONTEXT(ctx)->PointLineFacing = facing; -} - -void -_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value); - } - SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT ); - SWRAST_CONTEXT(ctx)->AllowVertexFog = value; -} - -void -_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value ) -{ - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value); - } - SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT ); - SWRAST_CONTEXT(ctx)->AllowPixelFog = value; -} - - -GLboolean -_swrast_CreateContext( GLcontext *ctx ) -{ - GLuint i; - SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext)); - - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_CreateContext\n"); - } - - if (!swrast) - return GL_FALSE; - - swrast->NewState = ~0; - - swrast->choose_point = _swrast_choose_point; - swrast->choose_line = _swrast_choose_line; - swrast->choose_triangle = _swrast_choose_triangle; - - swrast->InvalidatePointMask = _SWRAST_NEW_POINT; - swrast->InvalidateLineMask = _SWRAST_NEW_LINE; - swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE; - - swrast->Point = _swrast_validate_point; - swrast->Line = _swrast_validate_line; - swrast->Triangle = _swrast_validate_triangle; - swrast->InvalidateState = _swrast_sleep; - swrast->BlendFunc = _swrast_validate_blend_func; - - swrast->AllowVertexFog = GL_TRUE; - swrast->AllowPixelFog = GL_TRUE; - - /* Optimized Accum buffer */ - swrast->_IntegerAccumMode = GL_FALSE; - swrast->_IntegerAccumScaler = 0.0; - - for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) - swrast->TextureSample[i] = NULL; - - swrast->SpanArrays = MALLOC_STRUCT(sw_span_arrays); - if (!swrast->SpanArrays) { - FREE(swrast); - return GL_FALSE; - } - swrast->SpanArrays->ChanType = CHAN_TYPE; -#if CHAN_TYPE == GL_UNSIGNED_BYTE - swrast->SpanArrays->rgba = swrast->SpanArrays->rgba8; -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - swrast->SpanArrays->rgba = swrast->SpanArrays->rgba16; -#else - swrast->SpanArrays->rgba = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0]; -#endif - - /* init point span buffer */ - swrast->PointSpan.primitive = GL_POINT; - swrast->PointSpan.end = 0; - swrast->PointSpan.facing = 0; - swrast->PointSpan.array = swrast->SpanArrays; - - swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits * - MAX_WIDTH * 4 * sizeof(GLfloat)); - if (!swrast->TexelBuffer) { - FREE(swrast->SpanArrays); - FREE(swrast); - return GL_FALSE; - } - - ctx->swrast_context = swrast; - - return GL_TRUE; -} - -void -_swrast_DestroyContext( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - if (SWRAST_DEBUG) { - _mesa_debug(ctx, "_swrast_DestroyContext\n"); - } - - FREE( swrast->SpanArrays ); - if (swrast->ZoomedArrays) - FREE( swrast->ZoomedArrays ); - FREE( swrast->TexelBuffer ); - FREE( swrast ); - - ctx->swrast_context = 0; -} - - -struct swrast_device_driver * -_swrast_GetDeviceDriverReference( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - return &swrast->Driver; -} - -void -_swrast_flush( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - /* flush any pending fragments from rendering points */ - if (swrast->PointSpan.end > 0) { - _swrast_write_rgba_span(ctx, &(swrast->PointSpan)); - swrast->PointSpan.end = 0; - } -} - -void -_swrast_render_primitive( GLcontext *ctx, GLenum prim ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) { - _swrast_flush(ctx); - } - swrast->Primitive = prim; -} - - -void -_swrast_render_start( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Driver.SpanRenderStart) - swrast->Driver.SpanRenderStart( ctx ); - swrast->PointSpan.end = 0; -} - -void -_swrast_render_finish( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Driver.SpanRenderFinish) - swrast->Driver.SpanRenderFinish( ctx ); - - _swrast_flush(ctx); -} - - -#define SWRAST_DEBUG_VERTICES 0 - -void -_swrast_print_vertex( GLcontext *ctx, const SWvertex *v ) -{ - GLuint i; - - if (SWRAST_DEBUG_VERTICES) { - _mesa_debug(ctx, "win %f %f %f %f\n", - v->attrib[FRAG_ATTRIB_WPOS][0], - v->attrib[FRAG_ATTRIB_WPOS][1], - v->attrib[FRAG_ATTRIB_WPOS][2], - v->attrib[FRAG_ATTRIB_WPOS][3]); - - for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) - if (ctx->Texture.Unit[i]._ReallyEnabled) - _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i, - v->attrib[FRAG_ATTRIB_TEX0 + i][0], - v->attrib[FRAG_ATTRIB_TEX0 + i][1], - v->attrib[FRAG_ATTRIB_TEX0 + i][2], - v->attrib[FRAG_ATTRIB_TEX0 + i][3]); - -#if CHAN_TYPE == GL_FLOAT - _mesa_debug(ctx, "color %f %f %f %f\n", - v->color[0], v->color[1], v->color[2], v->color[3]); -#else - _mesa_debug(ctx, "color %d %d %d %d\n", - v->color[0], v->color[1], v->color[2], v->color[3]); -#endif - _mesa_debug(ctx, "spec %g %g %g %g\n", - v->attrib[FRAG_ATTRIB_COL1][0], - v->attrib[FRAG_ATTRIB_COL1][1], - v->attrib[FRAG_ATTRIB_COL1][2], - v->attrib[FRAG_ATTRIB_COL1][3]); - _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]); - _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]); - _mesa_debug(ctx, "pointsize %f\n", v->pointSize); - _mesa_debug(ctx, "\n"); - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/bufferobj.h"
+#include "main/colormac.h"
+#include "main/mtypes.h"
+#include "main/teximage.h"
+#include "program/prog_parameter.h"
+#include "program/prog_statevars.h"
+#include "swrast.h"
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_lines.h"
+#include "s_points.h"
+#include "s_span.h"
+#include "s_triangle.h"
+#include "s_texfilter.h"
+
+
+/**
+ * Recompute the value of swrast->_RasterMask, etc. according to
+ * the current context. The _RasterMask field can be easily tested by
+ * drivers to determine certain basic GL state (does the primitive need
+ * stenciling, logic-op, fog, etc?).
+ */
+static void
+_swrast_update_rasterflags( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLbitfield rasterMask = 0;
+ GLuint i;
+
+ if (ctx->Color.AlphaEnabled) rasterMask |= ALPHATEST_BIT;
+ if (ctx->Color.BlendEnabled) rasterMask |= BLEND_BIT;
+ if (ctx->Depth.Test) rasterMask |= DEPTH_BIT;
+ if (swrast->_FogEnabled) rasterMask |= FOG_BIT;
+ if (ctx->Scissor.Enabled) rasterMask |= CLIP_BIT;
+ if (ctx->Stencil._Enabled) rasterMask |= STENCIL_BIT;
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ if (!ctx->Color.ColorMask[i][0] ||
+ !ctx->Color.ColorMask[i][1] ||
+ !ctx->Color.ColorMask[i][2] ||
+ !ctx->Color.ColorMask[i][3]) {
+ rasterMask |= MASKING_BIT;
+ break;
+ }
+ }
+ if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT;
+ if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT;
+ if ( ctx->Viewport.X < 0
+ || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
+ || ctx->Viewport.Y < 0
+ || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
+ rasterMask |= CLIP_BIT;
+ }
+
+ if (ctx->Query.CurrentOcclusionObject)
+ rasterMask |= OCCLUSION_BIT;
+
+
+ /* If we're not drawing to exactly one color buffer set the
+ * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
+ * buffers or the RGBA or CI mask disables all writes.
+ */
+ if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
+ /* more than one color buffer designated for writing (or zero buffers) */
+ rasterMask |= MULTI_DRAW_BIT;
+ }
+
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ if (ctx->Color.ColorMask[i][0] +
+ ctx->Color.ColorMask[i][1] +
+ ctx->Color.ColorMask[i][2] +
+ ctx->Color.ColorMask[i][3] == 0) {
+ rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
+ break;
+ }
+ }
+
+
+ if (ctx->FragmentProgram._Current) {
+ rasterMask |= FRAGPROG_BIT;
+ }
+
+ if (ctx->ATIFragmentShader._Enabled) {
+ rasterMask |= ATIFRAGSHADER_BIT;
+ }
+
+#if CHAN_TYPE == GL_FLOAT
+ if (ctx->Color.ClampFragmentColor == GL_TRUE) {
+ rasterMask |= CLAMPING_BIT;
+ }
+#endif
+
+ SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
+}
+
+
+/**
+ * Examine polygon cull state to compute the _BackfaceCullSign field.
+ * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
+ * and 1 if culling front-faces. The Polygon FrontFace state also
+ * factors in.
+ */
+static void
+_swrast_update_polygon( struct gl_context *ctx )
+{
+ GLfloat backface_sign;
+
+ if (ctx->Polygon.CullFlag) {
+ switch (ctx->Polygon.CullFaceMode) {
+ case GL_BACK:
+ backface_sign = -1.0F;
+ break;
+ case GL_FRONT:
+ backface_sign = 1.0F;
+ break;
+ case GL_FRONT_AND_BACK:
+ /* fallthrough */
+ default:
+ backface_sign = 0.0F;
+ }
+ }
+ else {
+ backface_sign = 0.0F;
+ }
+
+ SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
+
+ /* This is for front/back-face determination, but not for culling */
+ SWRAST_CONTEXT(ctx)->_BackfaceSign
+ = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;
+}
+
+
+
+/**
+ * Update the _PreferPixelFog field to indicate if we need to compute
+ * fog blend factors (from the fog coords) per-fragment.
+ */
+static void
+_swrast_update_fog_hint( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
+ ctx->FragmentProgram._Current ||
+ (ctx->Hint.Fog == GL_NICEST &&
+ swrast->AllowPixelFog));
+}
+
+
+
+/**
+ * Update the swrast->_TextureCombinePrimary flag.
+ */
+static void
+_swrast_update_texture_env( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+
+ swrast->_TextureCombinePrimary = GL_FALSE;
+
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+ const struct gl_tex_env_combine_state *combine =
+ ctx->Texture.Unit[i]._CurrentCombine;
+ GLuint term;
+ for (term = 0; term < combine->_NumArgsRGB; term++) {
+ if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {
+ swrast->_TextureCombinePrimary = GL_TRUE;
+ return;
+ }
+ if (combine->SourceA[term] == GL_PRIMARY_COLOR) {
+ swrast->_TextureCombinePrimary = GL_TRUE;
+ return;
+ }
+ }
+ }
+}
+
+
+/**
+ * Determine if we can defer texturing/shading until after Z/stencil
+ * testing. This potentially allows us to skip texturing/shading for
+ * lots of fragments.
+ */
+static void
+_swrast_update_deferred_texture(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (ctx->Color.AlphaEnabled) {
+ /* alpha test depends on post-texture/shader colors */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else {
+ const struct gl_fragment_program *fprog
+ = ctx->FragmentProgram._Current;
+ if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {
+ /* Z comes from fragment program/shader */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else if (fprog && fprog->UsesKill) {
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else if (ctx->Query.CurrentOcclusionObject) {
+ /* occlusion query depends on shader discard/kill results */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else {
+ swrast->_DeferredTexture = GL_TRUE;
+ }
+ }
+}
+
+
+/**
+ * Update swrast->_FogColor and swrast->_FogEnable values.
+ */
+static void
+_swrast_update_fog_state( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+
+ /* determine if fog is needed, and if so, which fog mode */
+ swrast->_FogEnabled = GL_FALSE;
+ if (fp && fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB) {
+ if (fp->FogOption != GL_NONE) {
+ swrast->_FogEnabled = GL_TRUE;
+ swrast->_FogMode = fp->FogOption;
+ }
+ }
+ else if (ctx->Fog.Enabled) {
+ swrast->_FogEnabled = GL_TRUE;
+ swrast->_FogMode = ctx->Fog.Mode;
+ }
+}
+
+
+/**
+ * Update state for running fragment programs. Basically, load the
+ * program parameters with current state values.
+ */
+static void
+_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)
+{
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+ if (fp) {
+ _mesa_load_state_parameters(ctx, fp->Base.Parameters);
+ }
+}
+
+
+/**
+ * See if we can do early diffuse+specular (primary+secondary) color
+ * add per vertex instead of per-fragment.
+ */
+static void
+_swrast_update_specular_vertex_add(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);
+
+ swrast->SpecularVertexAdd = (separateSpecular
+ && ctx->Texture._EnabledUnits == 0x0
+ && !ctx->FragmentProgram._Current
+ && !ctx->ATIFragmentShader._Enabled);
+}
+
+
+#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
+ _NEW_PROGRAM_CONSTANTS | \
+ _NEW_TEXTURE | \
+ _NEW_HINT | \
+ _NEW_POLYGON )
+
+/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
+ */
+#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE| \
+ _NEW_POLYGON| \
+ _NEW_DEPTH| \
+ _NEW_STENCIL| \
+ _NEW_COLOR| \
+ _NEW_TEXTURE| \
+ _SWRAST_NEW_RASTERMASK| \
+ _NEW_LIGHT| \
+ _NEW_FOG | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE| \
+ _NEW_LINE| \
+ _NEW_TEXTURE| \
+ _NEW_LIGHT| \
+ _NEW_FOG| \
+ _NEW_DEPTH | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE | \
+ _NEW_POINT | \
+ _NEW_TEXTURE | \
+ _NEW_LIGHT | \
+ _NEW_FOG | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
+
+#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
+
+#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
+
+
+
+/**
+ * Stub for swrast->Triangle to select a true triangle function
+ * after a state change.
+ */
+static void
+_swrast_validate_triangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_triangle( ctx );
+ ASSERT(swrast->Triangle);
+
+ if (swrast->SpecularVertexAdd) {
+ /* separate specular color, but no texture */
+ swrast->SpecTriangle = swrast->Triangle;
+ swrast->Triangle = _swrast_add_spec_terms_triangle;
+ }
+
+ swrast->Triangle( ctx, v0, v1, v2 );
+}
+
+/**
+ * Called via swrast->Line. Examine current GL state and choose a software
+ * line routine. Then call it.
+ */
+static void
+_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_line( ctx );
+ ASSERT(swrast->Line);
+
+ if (swrast->SpecularVertexAdd) {
+ swrast->SpecLine = swrast->Line;
+ swrast->Line = _swrast_add_spec_terms_line;
+ }
+
+ swrast->Line( ctx, v0, v1 );
+}
+
+/**
+ * Called via swrast->Point. Examine current GL state and choose a software
+ * point routine. Then call it.
+ */
+static void
+_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_point( ctx );
+
+ if (swrast->SpecularVertexAdd) {
+ swrast->SpecPoint = swrast->Point;
+ swrast->Point = _swrast_add_spec_terms_point;
+ }
+
+ swrast->Point( ctx, v0 );
+}
+
+
+/**
+ * Called via swrast->BlendFunc. Examine GL state to choose a blending
+ * function, then call it.
+ */
+static void _ASMAPI
+_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst,
+ GLenum chanType )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx ); /* why is this needed? */
+ _swrast_choose_blend_func( ctx, chanType );
+
+ swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
+}
+
+
+/**
+ * Make sure we have texture image data for all the textures we may need
+ * for subsequent rendering.
+ */
+static void
+_swrast_validate_texture_images(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint u;
+
+ if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) {
+ /* no textures enabled, or no way to validate images! */
+ return;
+ }
+
+ for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
+ ASSERT(texObj);
+ if (texObj) {
+ GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+ GLuint face;
+ for (face = 0; face < numFaces; face++) {
+ GLint lvl;
+ for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
+ struct gl_texture_image *texImg = texObj->Image[face][lvl];
+ if (texImg && !texImg->Data) {
+ swrast->ValidateTextureImage(ctx, texObj, face, lvl);
+ ASSERT(texObj->Image[face][lvl]->Data);
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Free the texture image data attached to all currently enabled
+ * textures. Meant to be called by device drivers when transitioning
+ * from software to hardware rendering.
+ */
+void
+_swrast_eject_texture_images(struct gl_context *ctx)
+{
+ GLuint u;
+
+ if (!ctx->Texture._EnabledUnits) {
+ /* no textures enabled */
+ return;
+ }
+
+ for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
+ ASSERT(texObj);
+ if (texObj) {
+ GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+ GLuint face;
+ for (face = 0; face < numFaces; face++) {
+ GLint lvl;
+ for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
+ struct gl_texture_image *texImg = texObj->Image[face][lvl];
+ if (texImg && texImg->Data) {
+ _mesa_free_texmemory(texImg->Data);
+ texImg->Data = NULL;
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+
+
+static void
+_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )
+{
+ (void) ctx; (void) new_state;
+}
+
+
+static void
+_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+
+ swrast->NewState |= new_state;
+
+ /* After 10 statechanges without any swrast functions being called,
+ * put the module to sleep.
+ */
+ if (++swrast->StateChanges > 10) {
+ swrast->InvalidateState = _swrast_sleep;
+ swrast->NewState = ~0;
+ new_state = ~0;
+ }
+
+ if (new_state & swrast->InvalidateTriangleMask)
+ swrast->Triangle = _swrast_validate_triangle;
+
+ if (new_state & swrast->InvalidateLineMask)
+ swrast->Line = _swrast_validate_line;
+
+ if (new_state & swrast->InvalidatePointMask)
+ swrast->Point = _swrast_validate_point;
+
+ if (new_state & _SWRAST_NEW_BLEND_FUNC)
+ swrast->BlendFunc = _swrast_validate_blend_func;
+
+ if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
+ for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)
+ swrast->TextureSample[i] = NULL;
+}
+
+
+void
+_swrast_update_texture_samplers(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint u;
+
+ if (!swrast)
+ return; /* pipe hack */
+
+ for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+ const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+ /* Note: If tObj is NULL, the sample function will be a simple
+ * function that just returns opaque black (0,0,0,1).
+ */
+ swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+ }
+}
+
+
+/**
+ * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
+ * swrast->_ActiveAtttribMask.
+ */
+static void
+_swrast_update_active_attribs(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint attribsMask;
+
+ /*
+ * Compute _ActiveAttribsMask = which fragment attributes are needed.
+ */
+ if (ctx->FragmentProgram._Current) {
+ /* fragment program/shader */
+ attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
+ attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
+ }
+ else if (ctx->ATIFragmentShader._Enabled) {
+ attribsMask = ~0; /* XXX fix me */
+ }
+ else {
+ /* fixed function */
+ attribsMask = 0x0;
+
+#if CHAN_TYPE == GL_FLOAT
+ attribsMask |= FRAG_BIT_COL0;
+#endif
+
+ if (ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+ attribsMask |= FRAG_BIT_COL1;
+ }
+
+ if (swrast->_FogEnabled)
+ attribsMask |= FRAG_BIT_FOGC;
+
+ attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);
+ }
+
+ swrast->_ActiveAttribMask = attribsMask;
+
+ /* Update _ActiveAttribs[] list */
+ {
+ GLuint i, num = 0;
+ for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+ if (attribsMask & (1 << i)) {
+ swrast->_ActiveAttribs[num++] = i;
+ /* how should this attribute be interpolated? */
+ if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)
+ swrast->_InterpMode[i] = ctx->Light.ShadeModel;
+ else
+ swrast->_InterpMode[i] = GL_SMOOTH;
+ }
+ }
+ swrast->_NumActiveAttribs = num;
+ }
+}
+
+
+void
+_swrast_validate_derived( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->NewState) {
+ if (swrast->NewState & _NEW_POLYGON)
+ _swrast_update_polygon( ctx );
+
+ if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))
+ _swrast_update_fog_hint( ctx );
+
+ if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
+ _swrast_update_texture_env( ctx );
+
+ if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))
+ _swrast_update_fog_state( ctx );
+
+ if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))
+ _swrast_update_fragment_program( ctx, swrast->NewState );
+
+ if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {
+ _swrast_update_texture_samplers( ctx );
+ _swrast_validate_texture_images(ctx);
+ }
+
+ if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))
+ _swrast_update_deferred_texture(ctx);
+
+ if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
+ _swrast_update_rasterflags( ctx );
+
+ if (swrast->NewState & (_NEW_DEPTH |
+ _NEW_FOG |
+ _NEW_LIGHT |
+ _NEW_PROGRAM |
+ _NEW_TEXTURE))
+ _swrast_update_active_attribs(ctx);
+
+ if (swrast->NewState & (_NEW_FOG |
+ _NEW_PROGRAM |
+ _NEW_LIGHT |
+ _NEW_TEXTURE))
+ _swrast_update_specular_vertex_add(ctx);
+
+ swrast->NewState = 0;
+ swrast->StateChanges = 0;
+ swrast->InvalidateState = _swrast_invalidate_state;
+ }
+}
+
+#define SWRAST_DEBUG 0
+
+/* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
+ */
+void
+_swrast_Quad( struct gl_context *ctx,
+ const SWvertex *v0, const SWvertex *v1,
+ const SWvertex *v2, const SWvertex *v3 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Quad\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ _swrast_print_vertex( ctx, v2 );
+ _swrast_print_vertex( ctx, v3 );
+ }
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
+}
+
+void
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Triangle\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ _swrast_print_vertex( ctx, v2 );
+ }
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
+}
+
+void
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Line\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ }
+ SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
+}
+
+void
+_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Point\n");
+ _swrast_print_vertex( ctx, v0 );
+ }
+ SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
+}
+
+void
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_InvalidateState\n");
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
+}
+
+void
+_swrast_ResetLineStipple( struct gl_context *ctx )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
+ }
+ SWRAST_CONTEXT(ctx)->StippleCounter = 0;
+}
+
+void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing)
+{
+ SWRAST_CONTEXT(ctx)->PointLineFacing = facing;
+}
+
+void
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+ SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
+}
+
+void
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+ SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
+}
+
+
+GLboolean
+_swrast_CreateContext( struct gl_context *ctx )
+{
+ GLuint i;
+ SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
+
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_CreateContext\n");
+ }
+
+ if (!swrast)
+ return GL_FALSE;
+
+ swrast->NewState = ~0;
+
+ swrast->choose_point = _swrast_choose_point;
+ swrast->choose_line = _swrast_choose_line;
+ swrast->choose_triangle = _swrast_choose_triangle;
+
+ swrast->InvalidatePointMask = _SWRAST_NEW_POINT;
+ swrast->InvalidateLineMask = _SWRAST_NEW_LINE;
+ swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;
+
+ swrast->Point = _swrast_validate_point;
+ swrast->Line = _swrast_validate_line;
+ swrast->Triangle = _swrast_validate_triangle;
+ swrast->InvalidateState = _swrast_sleep;
+ swrast->BlendFunc = _swrast_validate_blend_func;
+
+ swrast->AllowVertexFog = GL_TRUE;
+ swrast->AllowPixelFog = GL_TRUE;
+
+ /* Optimized Accum buffer */
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
+
+ for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+ swrast->TextureSample[i] = NULL;
+
+ swrast->SpanArrays = MALLOC_STRUCT(sw_span_arrays);
+ if (!swrast->SpanArrays) {
+ FREE(swrast);
+ return GL_FALSE;
+ }
+ swrast->SpanArrays->ChanType = CHAN_TYPE;
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ swrast->SpanArrays->rgba = swrast->SpanArrays->rgba8;
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ swrast->SpanArrays->rgba = swrast->SpanArrays->rgba16;
+#else
+ swrast->SpanArrays->rgba = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
+#endif
+
+ /* init point span buffer */
+ swrast->PointSpan.primitive = GL_POINT;
+ swrast->PointSpan.end = 0;
+ swrast->PointSpan.facing = 0;
+ swrast->PointSpan.array = swrast->SpanArrays;
+
+ swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits *
+ MAX_WIDTH * 4 * sizeof(GLfloat));
+ if (!swrast->TexelBuffer) {
+ FREE(swrast->SpanArrays);
+ FREE(swrast);
+ return GL_FALSE;
+ }
+
+ ctx->swrast_context = swrast;
+
+ return GL_TRUE;
+}
+
+void
+_swrast_DestroyContext( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_DestroyContext\n");
+ }
+
+ FREE( swrast->SpanArrays );
+ if (swrast->ZoomedArrays)
+ FREE( swrast->ZoomedArrays );
+ FREE( swrast->TexelBuffer );
+ FREE( swrast );
+
+ ctx->swrast_context = 0;
+}
+
+
+struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ return &swrast->Driver;
+}
+
+void
+_swrast_flush( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ /* flush any pending fragments from rendering points */
+ if (swrast->PointSpan.end > 0) {
+ _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
+ swrast->PointSpan.end = 0;
+ }
+}
+
+void
+_swrast_render_primitive( struct gl_context *ctx, GLenum prim )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
+ _swrast_flush(ctx);
+ }
+ swrast->Primitive = prim;
+}
+
+
+void
+_swrast_render_start( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderStart)
+ swrast->Driver.SpanRenderStart( ctx );
+ swrast->PointSpan.end = 0;
+}
+
+void
+_swrast_render_finish( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderFinish)
+ swrast->Driver.SpanRenderFinish( ctx );
+
+ _swrast_flush(ctx);
+}
+
+
+#define SWRAST_DEBUG_VERTICES 0
+
+void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )
+{
+ GLuint i;
+
+ if (SWRAST_DEBUG_VERTICES) {
+ _mesa_debug(ctx, "win %f %f %f %f\n",
+ v->attrib[FRAG_ATTRIB_WPOS][0],
+ v->attrib[FRAG_ATTRIB_WPOS][1],
+ v->attrib[FRAG_ATTRIB_WPOS][2],
+ v->attrib[FRAG_ATTRIB_WPOS][3]);
+
+ for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
+ if (ctx->Texture.Unit[i]._ReallyEnabled)
+ _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
+ v->attrib[FRAG_ATTRIB_TEX0 + i][0],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][1],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][2],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
+
+#if CHAN_TYPE == GL_FLOAT
+ _mesa_debug(ctx, "color %f %f %f %f\n",
+ v->color[0], v->color[1], v->color[2], v->color[3]);
+#else
+ _mesa_debug(ctx, "color %d %d %d %d\n",
+ v->color[0], v->color[1], v->color[2], v->color[3]);
+#endif
+ _mesa_debug(ctx, "spec %g %g %g %g\n",
+ v->attrib[FRAG_ATTRIB_COL1][0],
+ v->attrib[FRAG_ATTRIB_COL1][1],
+ v->attrib[FRAG_ATTRIB_COL1][2],
+ v->attrib[FRAG_ATTRIB_COL1][3]);
+ _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);
+ _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);
+ _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
+ _mesa_debug(ctx, "\n");
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_context.h b/mesalib/src/mesa/swrast/s_context.h index 6d81f7476..7535832ab 100644 --- a/mesalib/src/mesa/swrast/s_context.h +++ b/mesalib/src/mesa/swrast/s_context.h @@ -1,349 +1,349 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/** - * \file swrast/s_context.h - * \brief Software rasterization context and private types. - * \author Keith Whitwell <keith@tungstengraphics.com> - */ - -/** - * \mainpage swrast module - * - * This module, software rasterization, contains the software fallback - * routines for drawing points, lines, triangles, bitmaps and images. - * All rendering boils down to writing spans (arrays) of pixels with - * particular colors. The span-writing routines must be implemented - * by the device driver. - */ - - -#ifndef S_CONTEXT_H -#define S_CONTEXT_H - -#include "main/compiler.h" -#include "main/mtypes.h" -#include "program/prog_execute.h" -#include "swrast.h" -#include "s_span.h" - - -typedef void (*texture_sample_func)(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]); - -typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n, - const GLubyte mask[], - GLvoid *src, const GLvoid *dst, - GLenum chanType); - -typedef void (*swrast_point_func)( GLcontext *ctx, const SWvertex *); - -typedef void (*swrast_line_func)( GLcontext *ctx, - const SWvertex *, const SWvertex *); - -typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *, - const SWvertex *, const SWvertex *); - - -typedef void (*validate_texture_image_func)(GLcontext *ctx, - struct gl_texture_object *texObj, - GLuint face, GLuint level); - - -/** - * \defgroup Bitmasks - * Bitmasks to indicate which rasterization options are enabled - * (RasterMask) - */ -/*@{*/ -#define ALPHATEST_BIT 0x001 /**< Alpha-test pixels */ -#define BLEND_BIT 0x002 /**< Blend pixels */ -#define DEPTH_BIT 0x004 /**< Depth-test pixels */ -#define FOG_BIT 0x008 /**< Fog pixels */ -#define LOGIC_OP_BIT 0x010 /**< Apply logic op in software */ -#define CLIP_BIT 0x020 /**< Scissor or window clip pixels */ -#define STENCIL_BIT 0x040 /**< Stencil pixels */ -#define MASKING_BIT 0x080 /**< Do glColorMask or glIndexMask */ -#define MULTI_DRAW_BIT 0x400 /**< Write to more than one color- */ - /**< buffer or no buffers. */ -#define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */ -#define TEXTURE_BIT 0x1000 /**< Texturing really enabled */ -#define FRAGPROG_BIT 0x2000 /**< Fragment program enabled */ -#define ATIFRAGSHADER_BIT 0x4000 /**< ATI Fragment shader enabled */ -#define CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */ -/*@}*/ - -#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \ - _NEW_SCISSOR| \ - _NEW_COLOR| \ - _NEW_DEPTH| \ - _NEW_FOG| \ - _NEW_PROGRAM| \ - _NEW_STENCIL| \ - _NEW_TEXTURE| \ - _NEW_VIEWPORT| \ - _NEW_DEPTH) - - -/** - * \struct SWcontext - * \brief Per-context state that's private to the software rasterizer module. - */ -typedef struct -{ - /** Driver interface: - */ - struct swrast_device_driver Driver; - - /** Configuration mechanisms to make software rasterizer match - * characteristics of the hardware rasterizer (if present): - */ - GLboolean AllowVertexFog; - GLboolean AllowPixelFog; - - /** Derived values, invalidated on statechanges, updated from - * _swrast_validate_derived(): - */ - GLbitfield _RasterMask; - GLfloat _BackfaceSign; /** +1 or -1 */ - GLfloat _BackfaceCullSign; /** +1, 0, or -1 */ - GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */ - GLboolean _TextureCombinePrimary; - GLboolean _FogEnabled; - GLboolean _DeferredTexture; - GLenum _FogMode; /* either GL_FOG_MODE or fragment program's fog mode */ - - /** List/array of the fragment attributes to interpolate */ - GLuint _ActiveAttribs[FRAG_ATTRIB_MAX]; - /** Same info, but as a bitmask */ - GLbitfield _ActiveAttribMask; - /** Number of fragment attributes to interpolate */ - GLuint _NumActiveAttribs; - /** Indicates how each attrib is to be interpolated (lines/tris) */ - GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */ - - /* Accum buffer temporaries. - */ - GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */ - GLfloat _IntegerAccumScaler; /**< Implicit scale factor */ - - /* Working values: - */ - GLuint StippleCounter; /**< Line stipple counter */ - GLuint PointLineFacing; - GLbitfield NewState; - GLuint StateChanges; - GLenum Primitive; /* current primitive being drawn (ala glBegin) */ - GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */ - - void (*InvalidateState)( GLcontext *ctx, GLbitfield new_state ); - - /** - * When the NewState mask intersects these masks, we invalidate the - * Point/Line/Triangle function pointers below. - */ - /*@{*/ - GLbitfield InvalidatePointMask; - GLbitfield InvalidateLineMask; - GLbitfield InvalidateTriangleMask; - /*@}*/ - - /** - * Device drivers plug in functions for these callbacks. - * Will be called when the GL state change mask intersects the above masks. - */ - /*@{*/ - void (*choose_point)( GLcontext * ); - void (*choose_line)( GLcontext * ); - void (*choose_triangle)( GLcontext * ); - /*@}*/ - - /** - * Current point, line and triangle drawing functions. - */ - /*@{*/ - swrast_point_func Point; - swrast_line_func Line; - swrast_tri_func Triangle; - /*@}*/ - - /** - * Placeholders for when separate specular (or secondary color) is - * enabled but texturing is not. - */ - /*@{*/ - swrast_point_func SpecPoint; - swrast_line_func SpecLine; - swrast_tri_func SpecTriangle; - /*@}*/ - - /** - * Typically, we'll allocate a sw_span structure as a local variable - * and set its 'array' pointer to point to this object. The reason is - * this object is big and causes problems when allocated on the stack - * on some systems. - */ - SWspanarrays *SpanArrays; - SWspanarrays *ZoomedArrays; /**< For pixel zooming */ - - /** - * Used to buffer N GL_POINTS, instead of rendering one by one. - */ - SWspan PointSpan; - - /** Internal hooks, kept up to date by the same mechanism as above. - */ - blend_func BlendFunc; - texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS]; - - /** Buffer for saving the sampled texture colors. - * Needed for GL_ARB_texture_env_crossbar implementation. - */ - GLfloat *TexelBuffer; - - validate_texture_image_func ValidateTextureImage; - - /** State used during execution of fragment programs */ - struct gl_program_machine FragProgMachine; - -} SWcontext; - - -extern void -_swrast_validate_derived( GLcontext *ctx ); - -extern void -_swrast_update_texture_samplers(GLcontext *ctx); - - -/** Return SWcontext for the given GLcontext */ -static INLINE SWcontext * -SWRAST_CONTEXT(GLcontext *ctx) -{ - return (SWcontext *) ctx->swrast_context; -} - -/** const version of above */ -static INLINE const SWcontext * -CONST_SWRAST_CONTEXT(const GLcontext *ctx) -{ - return (const SWcontext *) ctx->swrast_context; -} - - -/** - * Called prior to framebuffer reading/writing. - * For drivers that rely on swrast for fallback rendering, this is the - * driver's opportunity to map renderbuffers and textures. - */ -static INLINE void -swrast_render_start(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Driver.SpanRenderStart) - swrast->Driver.SpanRenderStart(ctx); -} - - -/** Called after framebuffer reading/writing */ -static INLINE void -swrast_render_finish(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Driver.SpanRenderFinish) - swrast->Driver.SpanRenderFinish(ctx); -} - - - -/** - * Size of an RGBA pixel, in bytes, for given datatype. - */ -#define RGBA_PIXEL_SIZE(TYPE) \ - ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \ - ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \ - : 4 * sizeof(GLfloat))) - - - -/* - * Fixed point arithmetic macros - */ -#ifndef FIXED_FRAC_BITS -#define FIXED_FRAC_BITS 11 -#endif - -#define FIXED_SHIFT FIXED_FRAC_BITS -#define FIXED_ONE (1 << FIXED_SHIFT) -#define FIXED_HALF (1 << (FIXED_SHIFT-1)) -#define FIXED_FRAC_MASK (FIXED_ONE - 1) -#define FIXED_INT_MASK (~FIXED_FRAC_MASK) -#define FIXED_EPSILON 1 -#define FIXED_SCALE ((float) FIXED_ONE) -#define FIXED_DBL_SCALE ((double) FIXED_ONE) -#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE)) -#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE)) -#define IntToFixed(I) ((I) << FIXED_SHIFT) -#define FixedToInt(X) ((X) >> FIXED_SHIFT) -#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT) -#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK) -#define FixedFloor(X) ((X) & FIXED_INT_MASK) -#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE)) -#define PosFloatToFixed(X) FloatToFixed(X) -#define SignedFloatToFixed(X) FloatToFixed(X) - - - -/* - * XXX these macros are just bandages for now in order to make - * CHAN_BITS==32 compile cleanly. - * These should probably go elsewhere at some point. - */ -#if CHAN_TYPE == GL_FLOAT -#define ChanToFixed(X) (X) -#define FixedToChan(X) (X) -#else -#define ChanToFixed(X) IntToFixed(X) -#define FixedToChan(X) FixedToInt(X) -#endif - - -/** - * For looping over fragment attributes in the pointe, line - * triangle rasterizers. - */ -#define ATTRIB_LOOP_BEGIN \ - { \ - GLuint a; \ - for (a = 0; a < swrast->_NumActiveAttribs; a++) { \ - const GLuint attr = swrast->_ActiveAttribs[a]; - -#define ATTRIB_LOOP_END } } - - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file swrast/s_context.h
+ * \brief Software rasterization context and private types.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+/**
+ * \mainpage swrast module
+ *
+ * This module, software rasterization, contains the software fallback
+ * routines for drawing points, lines, triangles, bitmaps and images.
+ * All rendering boils down to writing spans (arrays) of pixels with
+ * particular colors. The span-writing routines must be implemented
+ * by the device driver.
+ */
+
+
+#ifndef S_CONTEXT_H
+#define S_CONTEXT_H
+
+#include "main/compiler.h"
+#include "main/mtypes.h"
+#include "program/prog_execute.h"
+#include "swrast.h"
+#include "s_span.h"
+
+
+typedef void (*texture_sample_func)(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4]);
+
+typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,
+ const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst,
+ GLenum chanType);
+
+typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
+
+typedef void (*swrast_line_func)( struct gl_context *ctx,
+ const SWvertex *, const SWvertex *);
+
+typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
+ const SWvertex *, const SWvertex *);
+
+
+typedef void (*validate_texture_image_func)(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLuint face, GLuint level);
+
+
+/**
+ * \defgroup Bitmasks
+ * Bitmasks to indicate which rasterization options are enabled
+ * (RasterMask)
+ */
+/*@{*/
+#define ALPHATEST_BIT 0x001 /**< Alpha-test pixels */
+#define BLEND_BIT 0x002 /**< Blend pixels */
+#define DEPTH_BIT 0x004 /**< Depth-test pixels */
+#define FOG_BIT 0x008 /**< Fog pixels */
+#define LOGIC_OP_BIT 0x010 /**< Apply logic op in software */
+#define CLIP_BIT 0x020 /**< Scissor or window clip pixels */
+#define STENCIL_BIT 0x040 /**< Stencil pixels */
+#define MASKING_BIT 0x080 /**< Do glColorMask or glIndexMask */
+#define MULTI_DRAW_BIT 0x400 /**< Write to more than one color- */
+ /**< buffer or no buffers. */
+#define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */
+#define TEXTURE_BIT 0x1000 /**< Texturing really enabled */
+#define FRAGPROG_BIT 0x2000 /**< Fragment program enabled */
+#define ATIFRAGSHADER_BIT 0x4000 /**< ATI Fragment shader enabled */
+#define CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */
+/*@}*/
+
+#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \
+ _NEW_SCISSOR| \
+ _NEW_COLOR| \
+ _NEW_DEPTH| \
+ _NEW_FOG| \
+ _NEW_PROGRAM| \
+ _NEW_STENCIL| \
+ _NEW_TEXTURE| \
+ _NEW_VIEWPORT| \
+ _NEW_DEPTH)
+
+
+/**
+ * \struct SWcontext
+ * \brief Per-context state that's private to the software rasterizer module.
+ */
+typedef struct
+{
+ /** Driver interface:
+ */
+ struct swrast_device_driver Driver;
+
+ /** Configuration mechanisms to make software rasterizer match
+ * characteristics of the hardware rasterizer (if present):
+ */
+ GLboolean AllowVertexFog;
+ GLboolean AllowPixelFog;
+
+ /** Derived values, invalidated on statechanges, updated from
+ * _swrast_validate_derived():
+ */
+ GLbitfield _RasterMask;
+ GLfloat _BackfaceSign; /** +1 or -1 */
+ GLfloat _BackfaceCullSign; /** +1, 0, or -1 */
+ GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
+ GLboolean _TextureCombinePrimary;
+ GLboolean _FogEnabled;
+ GLboolean _DeferredTexture;
+ GLenum _FogMode; /* either GL_FOG_MODE or fragment program's fog mode */
+
+ /** List/array of the fragment attributes to interpolate */
+ GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
+ /** Same info, but as a bitmask */
+ GLbitfield _ActiveAttribMask;
+ /** Number of fragment attributes to interpolate */
+ GLuint _NumActiveAttribs;
+ /** Indicates how each attrib is to be interpolated (lines/tris) */
+ GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
+
+ /* Accum buffer temporaries.
+ */
+ GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
+ GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
+
+ /* Working values:
+ */
+ GLuint StippleCounter; /**< Line stipple counter */
+ GLuint PointLineFacing;
+ GLbitfield NewState;
+ GLuint StateChanges;
+ GLenum Primitive; /* current primitive being drawn (ala glBegin) */
+ GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
+
+ void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
+
+ /**
+ * When the NewState mask intersects these masks, we invalidate the
+ * Point/Line/Triangle function pointers below.
+ */
+ /*@{*/
+ GLbitfield InvalidatePointMask;
+ GLbitfield InvalidateLineMask;
+ GLbitfield InvalidateTriangleMask;
+ /*@}*/
+
+ /**
+ * Device drivers plug in functions for these callbacks.
+ * Will be called when the GL state change mask intersects the above masks.
+ */
+ /*@{*/
+ void (*choose_point)( struct gl_context * );
+ void (*choose_line)( struct gl_context * );
+ void (*choose_triangle)( struct gl_context * );
+ /*@}*/
+
+ /**
+ * Current point, line and triangle drawing functions.
+ */
+ /*@{*/
+ swrast_point_func Point;
+ swrast_line_func Line;
+ swrast_tri_func Triangle;
+ /*@}*/
+
+ /**
+ * Placeholders for when separate specular (or secondary color) is
+ * enabled but texturing is not.
+ */
+ /*@{*/
+ swrast_point_func SpecPoint;
+ swrast_line_func SpecLine;
+ swrast_tri_func SpecTriangle;
+ /*@}*/
+
+ /**
+ * Typically, we'll allocate a sw_span structure as a local variable
+ * and set its 'array' pointer to point to this object. The reason is
+ * this object is big and causes problems when allocated on the stack
+ * on some systems.
+ */
+ SWspanarrays *SpanArrays;
+ SWspanarrays *ZoomedArrays; /**< For pixel zooming */
+
+ /**
+ * Used to buffer N GL_POINTS, instead of rendering one by one.
+ */
+ SWspan PointSpan;
+
+ /** Internal hooks, kept up to date by the same mechanism as above.
+ */
+ blend_func BlendFunc;
+ texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
+
+ /** Buffer for saving the sampled texture colors.
+ * Needed for GL_ARB_texture_env_crossbar implementation.
+ */
+ GLfloat *TexelBuffer;
+
+ validate_texture_image_func ValidateTextureImage;
+
+ /** State used during execution of fragment programs */
+ struct gl_program_machine FragProgMachine;
+
+} SWcontext;
+
+
+extern void
+_swrast_validate_derived( struct gl_context *ctx );
+
+extern void
+_swrast_update_texture_samplers(struct gl_context *ctx);
+
+
+/** Return SWcontext for the given struct gl_context */
+static INLINE SWcontext *
+SWRAST_CONTEXT(struct gl_context *ctx)
+{
+ return (SWcontext *) ctx->swrast_context;
+}
+
+/** const version of above */
+static INLINE const SWcontext *
+CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
+{
+ return (const SWcontext *) ctx->swrast_context;
+}
+
+
+/**
+ * Called prior to framebuffer reading/writing.
+ * For drivers that rely on swrast for fallback rendering, this is the
+ * driver's opportunity to map renderbuffers and textures.
+ */
+static INLINE void
+swrast_render_start(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderStart)
+ swrast->Driver.SpanRenderStart(ctx);
+}
+
+
+/** Called after framebuffer reading/writing */
+static INLINE void
+swrast_render_finish(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderFinish)
+ swrast->Driver.SpanRenderFinish(ctx);
+}
+
+
+
+/**
+ * Size of an RGBA pixel, in bytes, for given datatype.
+ */
+#define RGBA_PIXEL_SIZE(TYPE) \
+ ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \
+ ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \
+ : 4 * sizeof(GLfloat)))
+
+
+
+/*
+ * Fixed point arithmetic macros
+ */
+#ifndef FIXED_FRAC_BITS
+#define FIXED_FRAC_BITS 11
+#endif
+
+#define FIXED_SHIFT FIXED_FRAC_BITS
+#define FIXED_ONE (1 << FIXED_SHIFT)
+#define FIXED_HALF (1 << (FIXED_SHIFT-1))
+#define FIXED_FRAC_MASK (FIXED_ONE - 1)
+#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
+#define FIXED_EPSILON 1
+#define FIXED_SCALE ((float) FIXED_ONE)
+#define FIXED_DBL_SCALE ((double) FIXED_ONE)
+#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
+#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
+#define IntToFixed(I) ((I) << FIXED_SHIFT)
+#define FixedToInt(X) ((X) >> FIXED_SHIFT)
+#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)
+#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
+#define FixedFloor(X) ((X) & FIXED_INT_MASK)
+#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
+#define PosFloatToFixed(X) FloatToFixed(X)
+#define SignedFloatToFixed(X) FloatToFixed(X)
+
+
+
+/*
+ * XXX these macros are just bandages for now in order to make
+ * CHAN_BITS==32 compile cleanly.
+ * These should probably go elsewhere at some point.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ChanToFixed(X) (X)
+#define FixedToChan(X) (X)
+#else
+#define ChanToFixed(X) IntToFixed(X)
+#define FixedToChan(X) FixedToInt(X)
+#endif
+
+
+/**
+ * For looping over fragment attributes in the pointe, line
+ * triangle rasterizers.
+ */
+#define ATTRIB_LOOP_BEGIN \
+ { \
+ GLuint a; \
+ for (a = 0; a < swrast->_NumActiveAttribs; a++) { \
+ const GLuint attr = swrast->_ActiveAttribs[a];
+
+#define ATTRIB_LOOP_END } }
+
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_copypix.c b/mesalib/src/mesa/swrast/s_copypix.c index f4f0c8a33..e249e4ad5 100644 --- a/mesalib/src/mesa/swrast/s_copypix.c +++ b/mesalib/src/mesa/swrast/s_copypix.c @@ -1,827 +1,720 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/condrender.h" -#include "main/convolve.h" -#include "main/image.h" -#include "main/macros.h" -#include "main/imports.h" - -#include "s_context.h" -#include "s_depth.h" -#include "s_span.h" -#include "s_stencil.h" -#include "s_zoom.h" - - - -/** - * Determine if there's overlap in an image copy. - * This test also compensates for the fact that copies are done from - * bottom to top and overlaps can sometimes be handled correctly - * without making a temporary image copy. - * \return GL_TRUE if the regions overlap, GL_FALSE otherwise. - */ -static GLboolean -regions_overlap(GLint srcx, GLint srcy, - GLint dstx, GLint dsty, - GLint width, GLint height, - GLfloat zoomX, GLfloat zoomY) -{ - if (zoomX == 1.0 && zoomY == 1.0) { - /* no zoom */ - if (srcx >= dstx + width || (srcx + width <= dstx)) { - return GL_FALSE; - } - else if (srcy < dsty) { /* this is OK */ - return GL_FALSE; - } - else if (srcy > dsty + height) { - return GL_FALSE; - } - else { - return GL_TRUE; - } - } - else { - /* add one pixel of slop when zooming, just to be safe */ - if (srcx > (dstx + ((zoomX > 0.0F) ? (width * zoomX + 1.0F) : 0.0F))) { - /* src is completely right of dest */ - return GL_FALSE; - } - else if (srcx + width + 1.0F < dstx + ((zoomX > 0.0F) ? 0.0F : (width * zoomX))) { - /* src is completely left of dest */ - return GL_FALSE; - } - else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) { - /* src is completely below dest */ - return GL_FALSE; - } - else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) { - /* src is completely above dest */ - return GL_FALSE; - } - else { - return GL_TRUE; - } - } -} - - -/** - * RGBA copypixels with convolution. - */ -static void -copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, GLint destx, GLint desty) -{ - GLint row; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - const GLbitfield transferOps = ctx->_ImageTransferState; - const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) - || (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink); - GLfloat *dest, *tmpImage, *convImage; - SWspan span; - - INIT_SPAN(span, GL_BITMAP); - _swrast_span_default_attribs(ctx, &span); - span.arrayMask = SPAN_RGBA; - span.arrayAttribs = FRAG_BIT_COL0; - - /* allocate space for GLfloat image */ - tmpImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!tmpImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); - return; - } - convImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!convImage) { - free(tmpImage); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); - return; - } - - /* read source image as float/RGBA */ - dest = tmpImage; - for (row = 0; row < height; row++) { - _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, - width, srcx, srcy + row, GL_FLOAT, dest); - dest += 4 * width; - } - - /* do the image transfer ops which preceed convolution */ - for (row = 0; row < height; row++) { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4); - _mesa_apply_rgba_transfer_ops(ctx, - transferOps & IMAGE_PRE_CONVOLUTION_BITS, - width, rgba); - } - - /* do convolution */ - if (ctx->Pixel.Convolution2DEnabled) { - _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage); - } - else { - ASSERT(ctx->Pixel.Separable2DEnabled); - _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage); - } - free(tmpImage); - - /* do remaining post-convolution image transfer ops */ - for (row = 0; row < height; row++) { - GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4); - _mesa_apply_rgba_transfer_ops(ctx, - transferOps & IMAGE_POST_CONVOLUTION_BITS, - width, rgba); - } - - if (!sink) { - /* write the new image */ - for (row = 0; row < height; row++) { - const GLfloat *src = convImage + row * width * 4; - GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0]; - - /* copy convolved colors into span array */ - memcpy(rgba, src, width * 4 * sizeof(GLfloat)); - - /* write span */ - span.x = destx; - span.y = desty + row; - span.end = width; - span.array->ChanType = GL_FLOAT; - if (zoom) { - _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba); - } - else { - _swrast_write_rgba_span(ctx, &span); - } - } - /* restore this */ - span.array->ChanType = CHAN_TYPE; - } - - free(convImage); -} - - -/** - * RGBA copypixels - */ -static void -copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, GLint destx, GLint desty) -{ - GLfloat *tmpImage, *p; - GLint sy, dy, stepy, row; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - GLint overlapping; - GLuint transferOps = ctx->_ImageTransferState; - SWspan span; - - if (!ctx->ReadBuffer->_ColorReadBuffer) { - /* no readbuffer - OK */ - return; - } - - if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { - copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty); - return; - } - else if (ctx->Pixel.Convolution1DEnabled) { - /* make sure we don't apply 1D convolution */ - transferOps &= ~(IMAGE_CONVOLUTION_BIT | - IMAGE_POST_CONVOLUTION_SCALE_BIAS); - } - - if (ctx->DrawBuffer == ctx->ReadBuffer) { - overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, - ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); - } - else { - overlapping = GL_FALSE; - } - - /* Determine if copy should be done bottom-to-top or top-to-bottom */ - if (!overlapping && srcy < desty) { - /* top-down max-to-min */ - sy = srcy + height - 1; - dy = desty + height - 1; - stepy = -1; - } - else { - /* bottom-up min-to-max */ - sy = srcy; - dy = desty; - stepy = 1; - } - - INIT_SPAN(span, GL_BITMAP); - _swrast_span_default_attribs(ctx, &span); - span.arrayMask = SPAN_RGBA; - span.arrayAttribs = FRAG_BIT_COL0; /* we'll fill in COL0 attrib values */ - - if (overlapping) { - tmpImage = (GLfloat *) malloc(width * height * sizeof(GLfloat) * 4); - if (!tmpImage) { - _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); - return; - } - /* read the source image as RGBA/float */ - p = tmpImage; - for (row = 0; row < height; row++) { - _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, - width, srcx, sy + row, GL_FLOAT, p ); - p += width * 4; - } - p = tmpImage; - } - else { - tmpImage = NULL; /* silence compiler warnings */ - p = NULL; - } - - ASSERT(width < MAX_WIDTH); - - for (row = 0; row < height; row++, sy += stepy, dy += stepy) { - GLvoid *rgba = span.array->attribs[FRAG_ATTRIB_COL0]; - - /* Get row/span of source pixels */ - if (overlapping) { - /* get from buffered image */ - memcpy(rgba, p, width * sizeof(GLfloat) * 4); - p += width * 4; - } - else { - /* get from framebuffer */ - _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, - width, srcx, sy, GL_FLOAT, rgba ); - } - - if (transferOps) { - _mesa_apply_rgba_transfer_ops(ctx, transferOps, width, - (GLfloat (*)[4]) rgba); - } - - /* Write color span */ - span.x = destx; - span.y = dy; - span.end = width; - span.array->ChanType = GL_FLOAT; - if (zoom) { - _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba); - } - else { - _swrast_write_rgba_span(ctx, &span); - } - } - - span.array->ChanType = CHAN_TYPE; /* restore */ - - if (overlapping) - free(tmpImage); -} - - -/** - * Convert floating point Z values to integer Z values with pixel transfer's - * Z scale and bias. - */ -static void -scale_and_bias_z(GLcontext *ctx, GLuint width, - const GLfloat depth[], GLuint z[]) -{ - const GLuint depthMax = ctx->DrawBuffer->_DepthMax; - GLuint i; - - if (depthMax <= 0xffffff && - ctx->Pixel.DepthScale == 1.0 && - ctx->Pixel.DepthBias == 0.0) { - /* no scale or bias and no clamping and no worry of overflow */ - const GLfloat depthMaxF = ctx->DrawBuffer->_DepthMaxF; - for (i = 0; i < width; i++) { - z[i] = (GLuint) (depth[i] * depthMaxF); - } - } - else { - /* need to be careful with overflow */ - const GLdouble depthMaxF = ctx->DrawBuffer->_DepthMaxF; - for (i = 0; i < width; i++) { - GLdouble d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias; - d = CLAMP(d, 0.0, 1.0) * depthMaxF; - if (d >= depthMaxF) - z[i] = depthMax; - else - z[i] = (GLuint) d; - } - } -} - - - -/* - * TODO: Optimize!!!! - */ -static void -copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, - GLint destx, GLint desty ) -{ - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *readRb = fb->_DepthBuffer; - GLfloat *p, *tmpImage; - GLint sy, dy, stepy; - GLint j; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - GLint overlapping; - SWspan span; - - if (!readRb) { - /* no readbuffer - OK */ - return; - } - - INIT_SPAN(span, GL_BITMAP); - _swrast_span_default_attribs(ctx, &span); - span.arrayMask = SPAN_Z; - - if (ctx->DrawBuffer == ctx->ReadBuffer) { - overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, - ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); - } - else { - overlapping = GL_FALSE; - } - - /* Determine if copy should be bottom-to-top or top-to-bottom */ - if (!overlapping && srcy < desty) { - /* top-down max-to-min */ - sy = srcy + height - 1; - dy = desty + height - 1; - stepy = -1; - } - else { - /* bottom-up min-to-max */ - sy = srcy; - dy = desty; - stepy = 1; - } - - if (overlapping) { - GLint ssy = sy; - tmpImage = (GLfloat *) malloc(width * height * sizeof(GLfloat)); - if (!tmpImage) { - _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); - return; - } - p = tmpImage; - for (j = 0; j < height; j++, ssy += stepy) { - _swrast_read_depth_span_float(ctx, readRb, width, srcx, ssy, p); - p += width; - } - p = tmpImage; - } - else { - tmpImage = NULL; /* silence compiler warning */ - p = NULL; - } - - for (j = 0; j < height; j++, sy += stepy, dy += stepy) { - GLfloat depth[MAX_WIDTH]; - /* get depth values */ - if (overlapping) { - memcpy(depth, p, width * sizeof(GLfloat)); - p += width; - } - else { - _swrast_read_depth_span_float(ctx, readRb, width, srcx, sy, depth); - } - - /* apply scale and bias */ - scale_and_bias_z(ctx, width, depth, span.array->z); - - /* write depth values */ - span.x = destx; - span.y = dy; - span.end = width; - if (zoom) - _swrast_write_zoomed_depth_span(ctx, destx, desty, &span); - else - _swrast_write_rgba_span(ctx, &span); - } - - if (overlapping) - free(tmpImage); -} - - - -static void -copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, - GLint destx, GLint desty ) -{ - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - GLint sy, dy, stepy; - GLint j; - GLstencil *p, *tmpImage; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - GLint overlapping; - - if (!rb) { - /* no readbuffer - OK */ - return; - } - - if (ctx->DrawBuffer == ctx->ReadBuffer) { - overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, - ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); - } - else { - overlapping = GL_FALSE; - } - - /* Determine if copy should be bottom-to-top or top-to-bottom */ - if (!overlapping && srcy < desty) { - /* top-down max-to-min */ - sy = srcy + height - 1; - dy = desty + height - 1; - stepy = -1; - } - else { - /* bottom-up min-to-max */ - sy = srcy; - dy = desty; - stepy = 1; - } - - if (overlapping) { - GLint ssy = sy; - tmpImage = (GLstencil *) malloc(width * height * sizeof(GLstencil)); - if (!tmpImage) { - _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); - return; - } - p = tmpImage; - for (j = 0; j < height; j++, ssy += stepy) { - _swrast_read_stencil_span( ctx, rb, width, srcx, ssy, p ); - p += width; - } - p = tmpImage; - } - else { - tmpImage = NULL; /* silence compiler warning */ - p = NULL; - } - - for (j = 0; j < height; j++, sy += stepy, dy += stepy) { - GLstencil stencil[MAX_WIDTH]; - - /* Get stencil values */ - if (overlapping) { - memcpy(stencil, p, width * sizeof(GLstencil)); - p += width; - } - else { - _swrast_read_stencil_span( ctx, rb, width, srcx, sy, stencil ); - } - - _mesa_apply_stencil_transfer_ops(ctx, width, stencil); - - /* Write stencil values */ - if (zoom) { - _swrast_write_zoomed_stencil_span(ctx, destx, desty, width, - destx, dy, stencil); - } - else { - _swrast_write_stencil_span( ctx, width, destx, dy, stencil ); - } - } - - if (overlapping) - free(tmpImage); -} - - -/** - * This isn't terribly efficient. If a driver really has combined - * depth/stencil buffers the driver should implement an optimized - * CopyPixels function. - */ -static void -copy_depth_stencil_pixels(GLcontext *ctx, - const GLint srcX, const GLint srcY, - const GLint width, const GLint height, - const GLint destX, const GLint destY) -{ - struct gl_renderbuffer *stencilReadRb, *depthReadRb, *depthDrawRb; - GLint sy, dy, stepy; - GLint j; - GLstencil *tempStencilImage = NULL, *stencilPtr = NULL; - GLfloat *tempDepthImage = NULL, *depthPtr = NULL; - const GLfloat depthScale = ctx->DrawBuffer->_DepthMaxF; - const GLuint stencilMask = ctx->Stencil.WriteMask[0]; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - const GLboolean scaleOrBias - = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; - GLint overlapping; - - depthDrawRb = ctx->DrawBuffer->_DepthBuffer; - depthReadRb = ctx->ReadBuffer->_DepthBuffer; - stencilReadRb = ctx->ReadBuffer->_StencilBuffer; - - ASSERT(depthDrawRb); - ASSERT(depthReadRb); - ASSERT(stencilReadRb); - - if (ctx->DrawBuffer == ctx->ReadBuffer) { - overlapping = regions_overlap(srcX, srcY, destX, destY, width, height, - ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); - } - else { - overlapping = GL_FALSE; - } - - /* Determine if copy should be bottom-to-top or top-to-bottom */ - if (!overlapping && srcY < destY) { - /* top-down max-to-min */ - sy = srcY + height - 1; - dy = destY + height - 1; - stepy = -1; - } - else { - /* bottom-up min-to-max */ - sy = srcY; - dy = destY; - stepy = 1; - } - - if (overlapping) { - GLint ssy = sy; - - if (stencilMask != 0x0) { - tempStencilImage - = (GLstencil *) malloc(width * height * sizeof(GLstencil)); - if (!tempStencilImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); - return; - } - - /* get copy of stencil pixels */ - stencilPtr = tempStencilImage; - for (j = 0; j < height; j++, ssy += stepy) { - _swrast_read_stencil_span(ctx, stencilReadRb, - width, srcX, ssy, stencilPtr); - stencilPtr += width; - } - stencilPtr = tempStencilImage; - } - - if (ctx->Depth.Mask) { - tempDepthImage - = (GLfloat *) malloc(width * height * sizeof(GLfloat)); - if (!tempDepthImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); - free(tempStencilImage); - return; - } - - /* get copy of depth pixels */ - depthPtr = tempDepthImage; - for (j = 0; j < height; j++, ssy += stepy) { - _swrast_read_depth_span_float(ctx, depthReadRb, - width, srcX, ssy, depthPtr); - depthPtr += width; - } - depthPtr = tempDepthImage; - } - } - - for (j = 0; j < height; j++, sy += stepy, dy += stepy) { - if (stencilMask != 0x0) { - GLstencil stencil[MAX_WIDTH]; - - /* Get stencil values */ - if (overlapping) { - memcpy(stencil, stencilPtr, width * sizeof(GLstencil)); - stencilPtr += width; - } - else { - _swrast_read_stencil_span(ctx, stencilReadRb, - width, srcX, sy, stencil); - } - - _mesa_apply_stencil_transfer_ops(ctx, width, stencil); - - /* Write values */ - if (zoom) { - _swrast_write_zoomed_stencil_span(ctx, destX, destY, width, - destX, dy, stencil); - } - else { - _swrast_write_stencil_span( ctx, width, destX, dy, stencil ); - } - } - - if (ctx->Depth.Mask) { - GLfloat depth[MAX_WIDTH]; - GLuint zVals32[MAX_WIDTH]; - GLushort zVals16[MAX_WIDTH]; - GLvoid *zVals; - GLuint zBytes; - - /* get depth values */ - if (overlapping) { - memcpy(depth, depthPtr, width * sizeof(GLfloat)); - depthPtr += width; - } - else { - _swrast_read_depth_span_float(ctx, depthReadRb, - width, srcX, sy, depth); - } - - /* scale & bias */ - if (scaleOrBias) { - _mesa_scale_and_bias_depth(ctx, width, depth); - } - /* convert to integer Z values */ - if (depthDrawRb->DataType == GL_UNSIGNED_SHORT) { - GLint k; - for (k = 0; k < width; k++) - zVals16[k] = (GLushort) (depth[k] * depthScale); - zVals = zVals16; - zBytes = 2; - } - else { - GLint k; - for (k = 0; k < width; k++) - zVals32[k] = (GLuint) (depth[k] * depthScale); - zVals = zVals32; - zBytes = 4; - } - - /* Write values */ - if (zoom) { - _swrast_write_zoomed_z_span(ctx, destX, destY, width, - destX, dy, zVals); - } - else { - _swrast_put_row(ctx, depthDrawRb, width, destX, dy, zVals, zBytes); - } - } - } - - if (tempStencilImage) - free(tempStencilImage); - - if (tempDepthImage) - free(tempDepthImage); -} - - - -/** - * Try to do a fast copy pixels. - */ -static GLboolean -fast_copy_pixels(GLcontext *ctx, - GLint srcX, GLint srcY, GLsizei width, GLsizei height, - GLint dstX, GLint dstY, GLenum type) -{ - struct gl_framebuffer *srcFb = ctx->ReadBuffer; - struct gl_framebuffer *dstFb = ctx->DrawBuffer; - struct gl_renderbuffer *srcRb, *dstRb; - GLint row, yStep; - - if (SWRAST_CONTEXT(ctx)->_RasterMask != 0x0 || - ctx->Pixel.ZoomX != 1.0F || - ctx->Pixel.ZoomY != 1.0F || - ctx->_ImageTransferState) { - /* can't handle these */ - return GL_FALSE; - } - - if (type == GL_COLOR) { - if (dstFb->_NumColorDrawBuffers != 1) - return GL_FALSE; - srcRb = srcFb->_ColorReadBuffer; - dstRb = dstFb->_ColorDrawBuffers[0]; - } - else if (type == GL_STENCIL) { - srcRb = srcFb->_StencilBuffer; - dstRb = dstFb->_StencilBuffer; - } - else if (type == GL_DEPTH) { - srcRb = srcFb->_DepthBuffer; - dstRb = dstFb->_DepthBuffer; - } - else { - ASSERT(type == GL_DEPTH_STENCIL_EXT); - /* XXX correct? */ - srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer; - dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer; - } - - /* src and dst renderbuffers must be same format and type */ - if (!srcRb || !dstRb || - srcRb->DataType != dstRb->DataType || - srcRb->_BaseFormat != dstRb->_BaseFormat) { - return GL_FALSE; - } - - /* clipping not supported */ - if (srcX < 0 || srcX + width > (GLint) srcFb->Width || - srcY < 0 || srcY + height > (GLint) srcFb->Height || - dstX < dstFb->_Xmin || dstX + width > dstFb->_Xmax || - dstY < dstFb->_Ymin || dstY + height > dstFb->_Ymax) { - return GL_FALSE; - } - - /* overlapping src/dst doesn't matter, just determine Y direction */ - if (srcY < dstY) { - /* top-down max-to-min */ - srcY = srcY + height - 1; - dstY = dstY + height - 1; - yStep = -1; - } - else { - /* bottom-up min-to-max */ - yStep = 1; - } - - for (row = 0; row < height; row++) { - GLuint temp[MAX_WIDTH][4]; - srcRb->GetRow(ctx, srcRb, width, srcX, srcY, temp); - dstRb->PutRow(ctx, dstRb, width, dstX, dstY, temp, NULL); - srcY += yStep; - dstY += yStep; - } - - return GL_TRUE; -} - - -/** - * Do software-based glCopyPixels. - * By time we get here, all parameters will have been error-checked. - */ -void -_swrast_CopyPixels( GLcontext *ctx, - GLint srcx, GLint srcy, GLsizei width, GLsizei height, - GLint destx, GLint desty, GLenum type ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - swrast_render_start(ctx); - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't copy */ - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - if (!fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty, type)) { - switch (type) { - case GL_COLOR: - copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty ); - break; - case GL_DEPTH: - copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty ); - break; - case GL_STENCIL: - copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty ); - break; - case GL_DEPTH_STENCIL_EXT: - copy_depth_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty); - break; - default: - _mesa_problem(ctx, "unexpected type in _swrast_CopyPixels"); - } - } - - swrast_render_finish(ctx); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/condrender.h"
+#include "main/macros.h"
+#include "main/pixeltransfer.h"
+#include "main/imports.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+
+/**
+ * Determine if there's overlap in an image copy.
+ * This test also compensates for the fact that copies are done from
+ * bottom to top and overlaps can sometimes be handled correctly
+ * without making a temporary image copy.
+ * \return GL_TRUE if the regions overlap, GL_FALSE otherwise.
+ */
+static GLboolean
+regions_overlap(GLint srcx, GLint srcy,
+ GLint dstx, GLint dsty,
+ GLint width, GLint height,
+ GLfloat zoomX, GLfloat zoomY)
+{
+ if (zoomX == 1.0 && zoomY == 1.0) {
+ /* no zoom */
+ if (srcx >= dstx + width || (srcx + width <= dstx)) {
+ return GL_FALSE;
+ }
+ else if (srcy < dsty) { /* this is OK */
+ return GL_FALSE;
+ }
+ else if (srcy > dsty + height) {
+ return GL_FALSE;
+ }
+ else {
+ return GL_TRUE;
+ }
+ }
+ else {
+ /* add one pixel of slop when zooming, just to be safe */
+ if (srcx > (dstx + ((zoomX > 0.0F) ? (width * zoomX + 1.0F) : 0.0F))) {
+ /* src is completely right of dest */
+ return GL_FALSE;
+ }
+ else if (srcx + width + 1.0F < dstx + ((zoomX > 0.0F) ? 0.0F : (width * zoomX))) {
+ /* src is completely left of dest */
+ return GL_FALSE;
+ }
+ else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) {
+ /* src is completely below dest */
+ return GL_FALSE;
+ }
+ else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) {
+ /* src is completely above dest */
+ return GL_FALSE;
+ }
+ else {
+ return GL_TRUE;
+ }
+ }
+}
+
+
+/**
+ * RGBA copypixels
+ */
+static void
+copy_rgba_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height, GLint destx, GLint desty)
+{
+ GLfloat *tmpImage, *p;
+ GLint sy, dy, stepy, row;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ GLint overlapping;
+ GLuint transferOps = ctx->_ImageTransferState;
+ SWspan span;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ /* Determine if copy should be done bottom-to-top or top-to-bottom */
+ if (!overlapping && srcy < desty) {
+ /* top-down max-to-min */
+ sy = srcy + height - 1;
+ dy = desty + height - 1;
+ stepy = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ sy = srcy;
+ dy = desty;
+ stepy = 1;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0; /* we'll fill in COL0 attrib values */
+
+ if (overlapping) {
+ tmpImage = (GLfloat *) malloc(width * height * sizeof(GLfloat) * 4);
+ if (!tmpImage) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
+ return;
+ }
+ /* read the source image as RGBA/float */
+ p = tmpImage;
+ for (row = 0; row < height; row++) {
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy + row, GL_FLOAT, p );
+ p += width * 4;
+ }
+ p = tmpImage;
+ }
+ else {
+ tmpImage = NULL; /* silence compiler warnings */
+ p = NULL;
+ }
+
+ ASSERT(width < MAX_WIDTH);
+
+ for (row = 0; row < height; row++, sy += stepy, dy += stepy) {
+ GLvoid *rgba = span.array->attribs[FRAG_ATTRIB_COL0];
+
+ /* Get row/span of source pixels */
+ if (overlapping) {
+ /* get from buffered image */
+ memcpy(rgba, p, width * sizeof(GLfloat) * 4);
+ p += width * 4;
+ }
+ else {
+ /* get from framebuffer */
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy, GL_FLOAT, rgba );
+ }
+
+ if (transferOps) {
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width,
+ (GLfloat (*)[4]) rgba);
+ }
+
+ /* Write color span */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ span.array->ChanType = GL_FLOAT;
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+
+ span.array->ChanType = CHAN_TYPE; /* restore */
+
+ if (overlapping)
+ free(tmpImage);
+}
+
+
+/**
+ * Convert floating point Z values to integer Z values with pixel transfer's
+ * Z scale and bias.
+ */
+static void
+scale_and_bias_z(struct gl_context *ctx, GLuint width,
+ const GLfloat depth[], GLuint z[])
+{
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ GLuint i;
+
+ if (depthMax <= 0xffffff &&
+ ctx->Pixel.DepthScale == 1.0 &&
+ ctx->Pixel.DepthBias == 0.0) {
+ /* no scale or bias and no clamping and no worry of overflow */
+ const GLfloat depthMaxF = ctx->DrawBuffer->_DepthMaxF;
+ for (i = 0; i < width; i++) {
+ z[i] = (GLuint) (depth[i] * depthMaxF);
+ }
+ }
+ else {
+ /* need to be careful with overflow */
+ const GLdouble depthMaxF = ctx->DrawBuffer->_DepthMaxF;
+ for (i = 0; i < width; i++) {
+ GLdouble d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
+ d = CLAMP(d, 0.0, 1.0) * depthMaxF;
+ if (d >= depthMaxF)
+ z[i] = depthMax;
+ else
+ z[i] = (GLuint) d;
+ }
+ }
+}
+
+
+
+/*
+ * TODO: Optimize!!!!
+ */
+static void
+copy_depth_pixels( struct gl_context *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *readRb = fb->_DepthBuffer;
+ GLfloat *p, *tmpImage;
+ GLint sy, dy, stepy;
+ GLint j;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ GLint overlapping;
+ SWspan span;
+
+ if (!readRb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_Z;
+
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (!overlapping && srcy < desty) {
+ /* top-down max-to-min */
+ sy = srcy + height - 1;
+ dy = desty + height - 1;
+ stepy = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ sy = srcy;
+ dy = desty;
+ stepy = 1;
+ }
+
+ if (overlapping) {
+ GLint ssy = sy;
+ tmpImage = (GLfloat *) malloc(width * height * sizeof(GLfloat));
+ if (!tmpImage) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
+ return;
+ }
+ p = tmpImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_depth_span_float(ctx, readRb, width, srcx, ssy, p);
+ p += width;
+ }
+ p = tmpImage;
+ }
+ else {
+ tmpImage = NULL; /* silence compiler warning */
+ p = NULL;
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ GLfloat depth[MAX_WIDTH];
+ /* get depth values */
+ if (overlapping) {
+ memcpy(depth, p, width * sizeof(GLfloat));
+ p += width;
+ }
+ else {
+ _swrast_read_depth_span_float(ctx, readRb, width, srcx, sy, depth);
+ }
+
+ /* apply scale and bias */
+ scale_and_bias_z(ctx, width, depth, span.array->z);
+
+ /* write depth values */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ if (zoom)
+ _swrast_write_zoomed_depth_span(ctx, destx, desty, &span);
+ else
+ _swrast_write_rgba_span(ctx, &span);
+ }
+
+ if (overlapping)
+ free(tmpImage);
+}
+
+
+
+static void
+copy_stencil_pixels( struct gl_context *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ GLint sy, dy, stepy;
+ GLint j;
+ GLstencil *p, *tmpImage;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ GLint overlapping;
+
+ if (!rb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (!overlapping && srcy < desty) {
+ /* top-down max-to-min */
+ sy = srcy + height - 1;
+ dy = desty + height - 1;
+ stepy = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ sy = srcy;
+ dy = desty;
+ stepy = 1;
+ }
+
+ if (overlapping) {
+ GLint ssy = sy;
+ tmpImage = (GLstencil *) malloc(width * height * sizeof(GLstencil));
+ if (!tmpImage) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
+ return;
+ }
+ p = tmpImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_stencil_span( ctx, rb, width, srcx, ssy, p );
+ p += width;
+ }
+ p = tmpImage;
+ }
+ else {
+ tmpImage = NULL; /* silence compiler warning */
+ p = NULL;
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ GLstencil stencil[MAX_WIDTH];
+
+ /* Get stencil values */
+ if (overlapping) {
+ memcpy(stencil, p, width * sizeof(GLstencil));
+ p += width;
+ }
+ else {
+ _swrast_read_stencil_span( ctx, rb, width, srcx, sy, stencil );
+ }
+
+ _mesa_apply_stencil_transfer_ops(ctx, width, stencil);
+
+ /* Write stencil values */
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, destx, desty, width,
+ destx, dy, stencil);
+ }
+ else {
+ _swrast_write_stencil_span( ctx, width, destx, dy, stencil );
+ }
+ }
+
+ if (overlapping)
+ free(tmpImage);
+}
+
+
+/**
+ * This isn't terribly efficient. If a driver really has combined
+ * depth/stencil buffers the driver should implement an optimized
+ * CopyPixels function.
+ */
+static void
+copy_depth_stencil_pixels(struct gl_context *ctx,
+ const GLint srcX, const GLint srcY,
+ const GLint width, const GLint height,
+ const GLint destX, const GLint destY)
+{
+ struct gl_renderbuffer *stencilReadRb, *depthReadRb, *depthDrawRb;
+ GLint sy, dy, stepy;
+ GLint j;
+ GLstencil *tempStencilImage = NULL, *stencilPtr = NULL;
+ GLfloat *tempDepthImage = NULL, *depthPtr = NULL;
+ const GLfloat depthScale = ctx->DrawBuffer->_DepthMaxF;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ GLint overlapping;
+
+ depthDrawRb = ctx->DrawBuffer->_DepthBuffer;
+ depthReadRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilReadRb = ctx->ReadBuffer->_StencilBuffer;
+
+ ASSERT(depthDrawRb);
+ ASSERT(depthReadRb);
+ ASSERT(stencilReadRb);
+
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcX, srcY, destX, destY, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (!overlapping && srcY < destY) {
+ /* top-down max-to-min */
+ sy = srcY + height - 1;
+ dy = destY + height - 1;
+ stepy = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ sy = srcY;
+ dy = destY;
+ stepy = 1;
+ }
+
+ if (overlapping) {
+ GLint ssy = sy;
+
+ if (stencilMask != 0x0) {
+ tempStencilImage
+ = (GLstencil *) malloc(width * height * sizeof(GLstencil));
+ if (!tempStencilImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ return;
+ }
+
+ /* get copy of stencil pixels */
+ stencilPtr = tempStencilImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_stencil_span(ctx, stencilReadRb,
+ width, srcX, ssy, stencilPtr);
+ stencilPtr += width;
+ }
+ stencilPtr = tempStencilImage;
+ }
+
+ if (ctx->Depth.Mask) {
+ tempDepthImage
+ = (GLfloat *) malloc(width * height * sizeof(GLfloat));
+ if (!tempDepthImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ free(tempStencilImage);
+ return;
+ }
+
+ /* get copy of depth pixels */
+ depthPtr = tempDepthImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_depth_span_float(ctx, depthReadRb,
+ width, srcX, ssy, depthPtr);
+ depthPtr += width;
+ }
+ depthPtr = tempDepthImage;
+ }
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ if (stencilMask != 0x0) {
+ GLstencil stencil[MAX_WIDTH];
+
+ /* Get stencil values */
+ if (overlapping) {
+ memcpy(stencil, stencilPtr, width * sizeof(GLstencil));
+ stencilPtr += width;
+ }
+ else {
+ _swrast_read_stencil_span(ctx, stencilReadRb,
+ width, srcX, sy, stencil);
+ }
+
+ _mesa_apply_stencil_transfer_ops(ctx, width, stencil);
+
+ /* Write values */
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, destX, destY, width,
+ destX, dy, stencil);
+ }
+ else {
+ _swrast_write_stencil_span( ctx, width, destX, dy, stencil );
+ }
+ }
+
+ if (ctx->Depth.Mask) {
+ GLfloat depth[MAX_WIDTH];
+ GLuint zVals32[MAX_WIDTH];
+ GLushort zVals16[MAX_WIDTH];
+ GLvoid *zVals;
+ GLuint zBytes;
+
+ /* get depth values */
+ if (overlapping) {
+ memcpy(depth, depthPtr, width * sizeof(GLfloat));
+ depthPtr += width;
+ }
+ else {
+ _swrast_read_depth_span_float(ctx, depthReadRb,
+ width, srcX, sy, depth);
+ }
+
+ /* scale & bias */
+ if (scaleOrBias) {
+ _mesa_scale_and_bias_depth(ctx, width, depth);
+ }
+ /* convert to integer Z values */
+ if (depthDrawRb->DataType == GL_UNSIGNED_SHORT) {
+ GLint k;
+ for (k = 0; k < width; k++)
+ zVals16[k] = (GLushort) (depth[k] * depthScale);
+ zVals = zVals16;
+ zBytes = 2;
+ }
+ else {
+ GLint k;
+ for (k = 0; k < width; k++)
+ zVals32[k] = (GLuint) (depth[k] * depthScale);
+ zVals = zVals32;
+ zBytes = 4;
+ }
+
+ /* Write values */
+ if (zoom) {
+ _swrast_write_zoomed_z_span(ctx, destX, destY, width,
+ destX, dy, zVals);
+ }
+ else {
+ _swrast_put_row(ctx, depthDrawRb, width, destX, dy, zVals, zBytes);
+ }
+ }
+ }
+
+ if (tempStencilImage)
+ free(tempStencilImage);
+
+ if (tempDepthImage)
+ free(tempDepthImage);
+}
+
+
+
+/**
+ * Try to do a fast copy pixels.
+ */
+static GLboolean
+fast_copy_pixels(struct gl_context *ctx,
+ GLint srcX, GLint srcY, GLsizei width, GLsizei height,
+ GLint dstX, GLint dstY, GLenum type)
+{
+ struct gl_framebuffer *srcFb = ctx->ReadBuffer;
+ struct gl_framebuffer *dstFb = ctx->DrawBuffer;
+ struct gl_renderbuffer *srcRb, *dstRb;
+ GLint row, yStep;
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask != 0x0 ||
+ ctx->Pixel.ZoomX != 1.0F ||
+ ctx->Pixel.ZoomY != 1.0F ||
+ ctx->_ImageTransferState) {
+ /* can't handle these */
+ return GL_FALSE;
+ }
+
+ if (type == GL_COLOR) {
+ if (dstFb->_NumColorDrawBuffers != 1)
+ return GL_FALSE;
+ srcRb = srcFb->_ColorReadBuffer;
+ dstRb = dstFb->_ColorDrawBuffers[0];
+ }
+ else if (type == GL_STENCIL) {
+ srcRb = srcFb->_StencilBuffer;
+ dstRb = dstFb->_StencilBuffer;
+ }
+ else if (type == GL_DEPTH) {
+ srcRb = srcFb->_DepthBuffer;
+ dstRb = dstFb->_DepthBuffer;
+ }
+ else {
+ ASSERT(type == GL_DEPTH_STENCIL_EXT);
+ /* XXX correct? */
+ srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ }
+
+ /* src and dst renderbuffers must be same format and type */
+ if (!srcRb || !dstRb ||
+ srcRb->DataType != dstRb->DataType ||
+ srcRb->_BaseFormat != dstRb->_BaseFormat) {
+ return GL_FALSE;
+ }
+
+ /* clipping not supported */
+ if (srcX < 0 || srcX + width > (GLint) srcFb->Width ||
+ srcY < 0 || srcY + height > (GLint) srcFb->Height ||
+ dstX < dstFb->_Xmin || dstX + width > dstFb->_Xmax ||
+ dstY < dstFb->_Ymin || dstY + height > dstFb->_Ymax) {
+ return GL_FALSE;
+ }
+
+ /* overlapping src/dst doesn't matter, just determine Y direction */
+ if (srcY < dstY) {
+ /* top-down max-to-min */
+ srcY = srcY + height - 1;
+ dstY = dstY + height - 1;
+ yStep = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ yStep = 1;
+ }
+
+ for (row = 0; row < height; row++) {
+ GLuint temp[MAX_WIDTH][4];
+ srcRb->GetRow(ctx, srcRb, width, srcX, srcY, temp);
+ dstRb->PutRow(ctx, dstRb, width, dstX, dstY, temp, NULL);
+ srcY += yStep;
+ dstY += yStep;
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Do software-based glCopyPixels.
+ * By time we get here, all parameters will have been error-checked.
+ */
+void
+_swrast_CopyPixels( struct gl_context *ctx,
+ GLint srcx, GLint srcy, GLsizei width, GLsizei height,
+ GLint destx, GLint desty, GLenum type )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ swrast_render_start(ctx);
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't copy */
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (!fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty, type)) {
+ switch (type) {
+ case GL_COLOR:
+ copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_DEPTH:
+ copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_STENCIL:
+ copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ copy_depth_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected type in _swrast_CopyPixels");
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_depth.c b/mesalib/src/mesa/swrast/s_depth.c index f952fd6ba..90b9ee572 100644 --- a/mesalib/src/mesa/swrast/s_depth.c +++ b/mesalib/src/mesa/swrast/s_depth.c @@ -1,1484 +1,1484 @@ -/* - * Mesa 3-D graphics library - * Version: 7.2.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/formats.h" -#include "main/macros.h" -#include "main/imports.h" - -#include "s_depth.h" -#include "s_span.h" - - -/** - * Do depth test for a horizontal span of fragments. - * Input: zbuffer - array of z values in the zbuffer - * z - array of fragment z values - * Return: number of fragments which pass the test. - */ -static GLuint -depth_test_span16( GLcontext *ctx, GLuint n, - GLushort zbuffer[], const GLuint z[], GLubyte mask[] ) -{ - GLuint passed = 0; - - /* switch cases ordered from most frequent to less frequent */ - switch (ctx->Depth.Func) { - case GL_LESS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - if (z[i] < zbuffer[i]) { - /* pass */ - zbuffer[i] = z[i]; - passed++; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - if (z[i] < zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_LEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] <= zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] <= zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_GEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] >= zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] >= zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_GREATER: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] > zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] > zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_NOTEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] != zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] != zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_EQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] == zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] == zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_ALWAYS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - zbuffer[i] = z[i]; - passed++; - } - } - } - else { - /* Don't update Z buffer or mask */ - passed = n; - } - break; - case GL_NEVER: - memset(mask, 0, n * sizeof(GLubyte)); - break; - default: - _mesa_problem(ctx, "Bad depth func in depth_test_span16"); - } - - return passed; -} - - -static GLuint -depth_test_span32( GLcontext *ctx, GLuint n, - GLuint zbuffer[], const GLuint z[], GLubyte mask[] ) -{ - GLuint passed = 0; - - /* switch cases ordered from most frequent to less frequent */ - switch (ctx->Depth.Func) { - case GL_LESS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - if (z[i] < zbuffer[i]) { - /* pass */ - zbuffer[i] = z[i]; - passed++; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - if (z[i] < zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_LEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] <= zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] <= zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_GEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] >= zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] >= zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_GREATER: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] > zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] > zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_NOTEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] != zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] != zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_EQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] == zbuffer[i]) { - zbuffer[i] = z[i]; - passed++; - } - else { - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - if (z[i] == zbuffer[i]) { - /* pass */ - passed++; - } - else { - mask[i] = 0; - } - } - } - } - break; - case GL_ALWAYS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0;i<n;i++) { - if (mask[i]) { - zbuffer[i] = z[i]; - passed++; - } - } - } - else { - /* Don't update Z buffer or mask */ - passed = n; - } - break; - case GL_NEVER: - memset(mask, 0, n * sizeof(GLubyte)); - break; - default: - _mesa_problem(ctx, "Bad depth func in depth_test_span32"); - } - - return passed; -} - - - -/** - * Clamp fragment Z values to the depth near/far range (glDepthRange()). - * This is used when GL_ARB_depth_clamp/GL_DEPTH_CLAMP is turned on. - * In that case, vertexes are not clipped against the near/far planes - * so rasterization will produce fragment Z values outside the usual - * [0,1] range. - */ -void -_swrast_depth_clamp_span( GLcontext *ctx, SWspan *span ) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - const GLuint count = span->end; - GLint *zValues = (GLint *) span->array->z; /* sign change */ - GLint min, max; - GLfloat min_f, max_f; - GLuint i; - - if (ctx->Viewport.Near < ctx->Viewport.Far) { - min_f = ctx->Viewport.Near; - max_f = ctx->Viewport.Far; - } else { - min_f = ctx->Viewport.Far; - max_f = ctx->Viewport.Near; - } - - /* Convert floating point values in [0,1] to device Z coordinates in - * [0, DepthMax]. - * ex: If the Z buffer has 24 bits, DepthMax = 0xffffff. - * - * XXX this all falls apart if we have 31 or more bits of Z because - * the triangle rasterization code produces unsigned Z values. Negative - * vertex Z values come out as large fragment Z uints. - */ - min = (GLint) (min_f * fb->_DepthMaxF); - max = (GLint) (max_f * fb->_DepthMaxF); - if (max < 0) - max = 0x7fffffff; /* catch over flow for 30-bit z */ - - /* Note that we do the comparisons here using signed integers. - */ - for (i = 0; i < count; i++) { - if (zValues[i] < min) - zValues[i] = min; - if (zValues[i] > max) - zValues[i] = max; - } -} - - - -/* - * Apply depth test to span of fragments. - */ -static GLuint -depth_test_span( GLcontext *ctx, SWspan *span) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_DepthBuffer; - const GLint x = span->x; - const GLint y = span->y; - const GLuint count = span->end; - const GLuint *zValues = span->array->z; - GLubyte *mask = span->array->mask; - GLuint passed; - - ASSERT((span->arrayMask & SPAN_XY) == 0); - ASSERT(span->arrayMask & SPAN_Z); - - if (rb->GetPointer(ctx, rb, 0, 0)) { - /* Directly access buffer */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort *zbuffer = (GLushort *) rb->GetPointer(ctx, rb, x, y); - passed = depth_test_span16(ctx, count, zbuffer, zValues, mask); - } - else { - GLuint *zbuffer = (GLuint *) rb->GetPointer(ctx, rb, x, y); - ASSERT(rb->DataType == GL_UNSIGNED_INT); - passed = depth_test_span32(ctx, count, zbuffer, zValues, mask); - } - } - else { - /* read depth values from buffer, test, write back */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort zbuffer[MAX_WIDTH]; - rb->GetRow(ctx, rb, count, x, y, zbuffer); - passed = depth_test_span16(ctx, count, zbuffer, zValues, mask); - rb->PutRow(ctx, rb, count, x, y, zbuffer, mask); - } - else { - GLuint zbuffer[MAX_WIDTH]; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, count, x, y, zbuffer); - passed = depth_test_span32(ctx, count, zbuffer, zValues, mask); - rb->PutRow(ctx, rb, count, x, y, zbuffer, mask); - } - } - - if (passed < count) { - span->writeAll = GL_FALSE; - } - return passed; -} - - - -#define Z_ADDRESS(X, Y) (zStart + (Y) * stride + (X)) - - -/* - * Do depth testing for an array of fragments at assorted locations. - */ -static void -direct_depth_test_pixels16(GLcontext *ctx, GLushort *zStart, GLuint stride, - GLuint n, const GLint x[], const GLint y[], - const GLuint z[], GLubyte mask[] ) -{ - /* switch cases ordered from most frequent to less frequent */ - switch (ctx->Depth.Func) { - case GL_LESS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] < *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] < *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_LEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] <= *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] <= *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_GEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] >= *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] >= *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_GREATER: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] > *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] > *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_NOTEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] != *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] != *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_EQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] == *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] == *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_ALWAYS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLushort *zptr = Z_ADDRESS(x[i], y[i]); - *zptr = z[i]; - } - } - } - else { - /* Don't update Z buffer or mask */ - } - break; - case GL_NEVER: - /* depth test never passes */ - memset(mask, 0, n * sizeof(GLubyte)); - break; - default: - _mesa_problem(ctx, "Bad depth func in direct_depth_test_pixels"); - } -} - - - -/* - * Do depth testing for an array of fragments with direct access to zbuffer. - */ -static void -direct_depth_test_pixels32(GLcontext *ctx, GLuint *zStart, GLuint stride, - GLuint n, const GLint x[], const GLint y[], - const GLuint z[], GLubyte mask[] ) -{ - /* switch cases ordered from most frequent to less frequent */ - switch (ctx->Depth.Func) { - case GL_LESS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] < *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] < *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_LEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] <= *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] <= *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_GEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] >= *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] >= *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_GREATER: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] > *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] > *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_NOTEQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] != *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] != *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_EQUAL: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] == *zptr) { - /* pass */ - *zptr = z[i]; - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - else { - /* Don't update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - if (z[i] == *zptr) { - /* pass */ - } - else { - /* fail */ - mask[i] = 0; - } - } - } - } - break; - case GL_ALWAYS: - if (ctx->Depth.Mask) { - /* Update Z buffer */ - GLuint i; - for (i=0; i<n; i++) { - if (mask[i]) { - GLuint *zptr = Z_ADDRESS(x[i], y[i]); - *zptr = z[i]; - } - } - } - else { - /* Don't update Z buffer or mask */ - } - break; - case GL_NEVER: - /* depth test never passes */ - memset(mask, 0, n * sizeof(GLubyte)); - break; - default: - _mesa_problem(ctx, "Bad depth func in direct_depth_test_pixels"); - } -} - - - - -static GLuint -depth_test_pixels( GLcontext *ctx, SWspan *span ) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_DepthBuffer; - const GLuint count = span->end; - const GLint *x = span->array->x; - const GLint *y = span->array->y; - const GLuint *z = span->array->z; - GLubyte *mask = span->array->mask; - - if (rb->GetPointer(ctx, rb, 0, 0)) { - /* Directly access values */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort *zStart = (GLushort *) rb->Data; - GLuint stride = rb->Width; - direct_depth_test_pixels16(ctx, zStart, stride, count, x, y, z, mask); - } - else { - GLuint *zStart = (GLuint *) rb->Data; - GLuint stride = rb->Width; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - direct_depth_test_pixels32(ctx, zStart, stride, count, x, y, z, mask); - } - } - else { - /* read depth values from buffer, test, write back */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort zbuffer[MAX_WIDTH]; - _swrast_get_values(ctx, rb, count, x, y, zbuffer, sizeof(GLushort)); - depth_test_span16(ctx, count, zbuffer, z, mask); - rb->PutValues(ctx, rb, count, x, y, zbuffer, mask); - } - else { - GLuint zbuffer[MAX_WIDTH]; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - _swrast_get_values(ctx, rb, count, x, y, zbuffer, sizeof(GLuint)); - depth_test_span32(ctx, count, zbuffer, z, mask); - rb->PutValues(ctx, rb, count, x, y, zbuffer, mask); - } - } - - return count; /* not really correct, but OK */ -} - - -/** - * Apply depth (Z) buffer testing to the span. - * \return approx number of pixels that passed (only zero is reliable) - */ -GLuint -_swrast_depth_test_span( GLcontext *ctx, SWspan *span) -{ - if (span->arrayMask & SPAN_XY) - return depth_test_pixels(ctx, span); - else - return depth_test_span(ctx, span); -} - - -/** - * GL_EXT_depth_bounds_test extension. - * Discard fragments depending on whether the corresponding Z-buffer - * values are outside the depth bounds test range. - * Note: we test the Z buffer values, not the fragment Z values! - * \return GL_TRUE if any fragments pass, GL_FALSE if no fragments pass - */ -GLboolean -_swrast_depth_bounds_test( GLcontext *ctx, SWspan *span ) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_DepthBuffer; - GLuint zMin = (GLuint) (ctx->Depth.BoundsMin * fb->_DepthMaxF + 0.5F); - GLuint zMax = (GLuint) (ctx->Depth.BoundsMax * fb->_DepthMaxF + 0.5F); - GLubyte *mask = span->array->mask; - const GLuint count = span->end; - GLuint i; - GLboolean anyPass = GL_FALSE; - - if (rb->DataType == GL_UNSIGNED_SHORT) { - /* get 16-bit values */ - GLushort zbuffer16[MAX_WIDTH], *zbuffer; - if (span->arrayMask & SPAN_XY) { - _swrast_get_values(ctx, rb, count, span->array->x, span->array->y, - zbuffer16, sizeof(GLushort)); - zbuffer = zbuffer16; - } - else { - zbuffer = (GLushort*) rb->GetPointer(ctx, rb, span->x, span->y); - if (!zbuffer) { - rb->GetRow(ctx, rb, count, span->x, span->y, zbuffer16); - zbuffer = zbuffer16; - } - } - assert(zbuffer); - - /* Now do the tests */ - for (i = 0; i < count; i++) { - if (mask[i]) { - if (zbuffer[i] < zMin || zbuffer[i] > zMax) - mask[i] = GL_FALSE; - else - anyPass = GL_TRUE; - } - } - } - else { - /* get 32-bit values */ - GLuint zbuffer32[MAX_WIDTH], *zbuffer; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - if (span->arrayMask & SPAN_XY) { - _swrast_get_values(ctx, rb, count, span->array->x, span->array->y, - zbuffer32, sizeof(GLuint)); - zbuffer = zbuffer32; - } - else { - zbuffer = (GLuint*) rb->GetPointer(ctx, rb, span->x, span->y); - if (!zbuffer) { - rb->GetRow(ctx, rb, count, span->x, span->y, zbuffer32); - zbuffer = zbuffer32; - } - } - assert(zbuffer); - - /* Now do the tests */ - for (i = 0; i < count; i++) { - if (mask[i]) { - if (zbuffer[i] < zMin || zbuffer[i] > zMax) - mask[i] = GL_FALSE; - else - anyPass = GL_TRUE; - } - } - } - - return anyPass; -} - - - -/**********************************************************************/ -/***** Read Depth Buffer *****/ -/**********************************************************************/ - - -/** - * Read a span of depth values from the given depth renderbuffer, returning - * the values as GLfloats. - * This function does clipping to prevent reading outside the depth buffer's - * bounds. Though the clipping is redundant when we're called from - * _swrast_ReadPixels. - */ -void -_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLfloat depth[] ) -{ - const GLfloat scale = 1.0F / ctx->DrawBuffer->_DepthMaxF; - - if (!rb) { - /* really only doing this to prevent FP exceptions later */ - memset(depth, 0, n * sizeof(GLfloat)); - return; - } - - ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT); - - if (y < 0 || y >= (GLint) rb->Height || - x + n <= 0 || x >= (GLint) rb->Width) { - /* span is completely outside framebuffer */ - memset(depth, 0, n * sizeof(GLfloat)); - return; - } - - if (x < 0) { - GLint dx = -x; - GLint i; - for (i = 0; i < dx; i++) - depth[i] = 0.0; - x = 0; - n -= dx; - depth += dx; - } - if (x + n > (GLint) rb->Width) { - GLint dx = x + n - (GLint) rb->Width; - GLint i; - for (i = 0; i < dx; i++) - depth[n - i - 1] = 0.0; - n -= dx; - } - if (n <= 0) { - return; - } - - if (rb->DataType == GL_UNSIGNED_INT) { - GLuint temp[MAX_WIDTH]; - GLint i; - rb->GetRow(ctx, rb, n, x, y, temp); - for (i = 0; i < n; i++) { - depth[i] = temp[i] * scale; - } - } - else if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort temp[MAX_WIDTH]; - GLint i; - rb->GetRow(ctx, rb, n, x, y, temp); - for (i = 0; i < n; i++) { - depth[i] = temp[i] * scale; - } - } - else { - _mesa_problem(ctx, "Invalid depth renderbuffer data type"); - } -} - - -/** - * As above, but return 32-bit GLuint values. - */ -void -_swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLuint depth[] ) -{ - GLuint depthBits; - - if (!rb) { - /* really only doing this to prevent FP exceptions later */ - memset(depth, 0, n * sizeof(GLuint)); - return; - } - - depthBits = _mesa_get_format_bits(rb->Format, GL_DEPTH_BITS); - - ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT); - - if (y < 0 || y >= (GLint) rb->Height || - x + n <= 0 || x >= (GLint) rb->Width) { - /* span is completely outside framebuffer */ - memset(depth, 0, n * sizeof(GLfloat)); - return; - } - - if (x < 0) { - GLint dx = -x; - GLint i; - for (i = 0; i < dx; i++) - depth[i] = 0; - x = 0; - n -= dx; - depth += dx; - } - if (x + n > (GLint) rb->Width) { - GLint dx = x + n - (GLint) rb->Width; - GLint i; - for (i = 0; i < dx; i++) - depth[n - i - 1] = 0; - n -= dx; - } - if (n <= 0) { - return; - } - - if (rb->DataType == GL_UNSIGNED_INT) { - rb->GetRow(ctx, rb, n, x, y, depth); - if (depthBits < 32) { - GLuint shift = 32 - depthBits; - GLint i; - for (i = 0; i < n; i++) { - GLuint z = depth[i]; - depth[i] = z << shift; /* XXX lsb bits? */ - } - } - } - else if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort temp[MAX_WIDTH]; - GLint i; - rb->GetRow(ctx, rb, n, x, y, temp); - if (depthBits == 16) { - for (i = 0; i < n; i++) { - GLuint z = temp[i]; - depth[i] = (z << 16) | z; - } - } - else { - GLuint shift = 16 - depthBits; - for (i = 0; i < n; i++) { - GLuint z = temp[i]; - depth[i] = (z << (shift + 16)) | (z << shift); /* XXX lsb bits? */ - } - } - } - else { - _mesa_problem(ctx, "Invalid depth renderbuffer data type"); - } -} - - - -/** - * Clear the given z/depth renderbuffer. - */ -void -_swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ) -{ - GLuint clearValue; - GLint x, y, width, height; - - if (!rb || !ctx->Depth.Mask) { - /* no depth buffer, or writing to it is disabled */ - return; - } - - /* compute integer clearing value */ - if (ctx->Depth.Clear == 1.0) { - clearValue = ctx->DrawBuffer->_DepthMax; - } - else { - clearValue = (GLuint) (ctx->Depth.Clear * ctx->DrawBuffer->_DepthMaxF); - } - - assert(rb->_BaseFormat == GL_DEPTH_COMPONENT); - - /* compute region to clear */ - x = ctx->DrawBuffer->_Xmin; - y = ctx->DrawBuffer->_Ymin; - width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - - if (rb->GetPointer(ctx, rb, 0, 0)) { - /* Direct buffer access is possible. Either this is just malloc'd - * memory, or perhaps the driver mmap'd the zbuffer memory. - */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - if ((clearValue & 0xff) == ((clearValue >> 8) & 0xff) && - ((GLushort *) rb->GetPointer(ctx, rb, 0, 0) + width == - (GLushort *) rb->GetPointer(ctx, rb, 0, 1))) { - /* optimized case */ - GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y); - GLuint len = width * height * sizeof(GLushort); - memset(dst, (clearValue & 0xff), len); - } - else { - /* general case */ - GLint i, j; - for (i = 0; i < height; i++) { - GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y + i); - for (j = 0; j < width; j++) { - dst[j] = clearValue; - } - } - } - } - else { - GLint i, j; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - for (i = 0; i < height; i++) { - GLuint *dst = (GLuint *) rb->GetPointer(ctx, rb, x, y + i); - for (j = 0; j < width; j++) { - dst[j] = clearValue; - } - } - } - } - else { - /* Direct access not possible. Use PutRow to write new values. */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - GLushort clearVal16 = (GLushort) (clearValue & 0xffff); - GLint i; - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, &clearVal16, NULL); - } - } - else if (rb->DataType == GL_UNSIGNED_INT) { - GLint i; - ASSERT(sizeof(clearValue) == sizeof(GLuint)); - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, &clearValue, NULL); - } - } - else { - _mesa_problem(ctx, "bad depth renderbuffer DataType"); - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.2.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/formats.h"
+#include "main/macros.h"
+#include "main/imports.h"
+
+#include "s_depth.h"
+#include "s_span.h"
+
+
+/**
+ * Do depth test for a horizontal span of fragments.
+ * Input: zbuffer - array of z values in the zbuffer
+ * z - array of fragment z values
+ * Return: number of fragments which pass the test.
+ */
+static GLuint
+depth_test_span16( struct gl_context *ctx, GLuint n,
+ GLushort zbuffer[], const GLuint z[], GLubyte mask[] )
+{
+ GLuint passed = 0;
+
+ /* switch cases ordered from most frequent to less frequent */
+ switch (ctx->Depth.Func) {
+ case GL_LESS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ if (z[i] < zbuffer[i]) {
+ /* pass */
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ if (z[i] < zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] <= zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] <= zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] >= zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] >= zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GREATER:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] > zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] > zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] != zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] != zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_EQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] == zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] == zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer or mask */
+ passed = n;
+ }
+ break;
+ case GL_NEVER:
+ memset(mask, 0, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in depth_test_span16");
+ }
+
+ return passed;
+}
+
+
+static GLuint
+depth_test_span32( struct gl_context *ctx, GLuint n,
+ GLuint zbuffer[], const GLuint z[], GLubyte mask[] )
+{
+ GLuint passed = 0;
+
+ /* switch cases ordered from most frequent to less frequent */
+ switch (ctx->Depth.Func) {
+ case GL_LESS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ if (z[i] < zbuffer[i]) {
+ /* pass */
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ if (z[i] < zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] <= zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] <= zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] >= zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] >= zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GREATER:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] > zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] > zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] != zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] != zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_EQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] == zbuffer[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ if (z[i] == zbuffer[i]) {
+ /* pass */
+ passed++;
+ }
+ else {
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ zbuffer[i] = z[i];
+ passed++;
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer or mask */
+ passed = n;
+ }
+ break;
+ case GL_NEVER:
+ memset(mask, 0, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in depth_test_span32");
+ }
+
+ return passed;
+}
+
+
+
+/**
+ * Clamp fragment Z values to the depth near/far range (glDepthRange()).
+ * This is used when GL_ARB_depth_clamp/GL_DEPTH_CLAMP is turned on.
+ * In that case, vertexes are not clipped against the near/far planes
+ * so rasterization will produce fragment Z values outside the usual
+ * [0,1] range.
+ */
+void
+_swrast_depth_clamp_span( struct gl_context *ctx, SWspan *span )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ const GLuint count = span->end;
+ GLint *zValues = (GLint *) span->array->z; /* sign change */
+ GLint min, max;
+ GLfloat min_f, max_f;
+ GLuint i;
+
+ if (ctx->Viewport.Near < ctx->Viewport.Far) {
+ min_f = ctx->Viewport.Near;
+ max_f = ctx->Viewport.Far;
+ } else {
+ min_f = ctx->Viewport.Far;
+ max_f = ctx->Viewport.Near;
+ }
+
+ /* Convert floating point values in [0,1] to device Z coordinates in
+ * [0, DepthMax].
+ * ex: If the Z buffer has 24 bits, DepthMax = 0xffffff.
+ *
+ * XXX this all falls apart if we have 31 or more bits of Z because
+ * the triangle rasterization code produces unsigned Z values. Negative
+ * vertex Z values come out as large fragment Z uints.
+ */
+ min = (GLint) (min_f * fb->_DepthMaxF);
+ max = (GLint) (max_f * fb->_DepthMaxF);
+ if (max < 0)
+ max = 0x7fffffff; /* catch over flow for 30-bit z */
+
+ /* Note that we do the comparisons here using signed integers.
+ */
+ for (i = 0; i < count; i++) {
+ if (zValues[i] < min)
+ zValues[i] = min;
+ if (zValues[i] > max)
+ zValues[i] = max;
+ }
+}
+
+
+
+/*
+ * Apply depth test to span of fragments.
+ */
+static GLuint
+depth_test_span( struct gl_context *ctx, SWspan *span)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ const GLint x = span->x;
+ const GLint y = span->y;
+ const GLuint count = span->end;
+ const GLuint *zValues = span->array->z;
+ GLubyte *mask = span->array->mask;
+ GLuint passed;
+
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+ ASSERT(span->arrayMask & SPAN_Z);
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* Directly access buffer */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort *zbuffer = (GLushort *) rb->GetPointer(ctx, rb, x, y);
+ passed = depth_test_span16(ctx, count, zbuffer, zValues, mask);
+ }
+ else {
+ GLuint *zbuffer = (GLuint *) rb->GetPointer(ctx, rb, x, y);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ passed = depth_test_span32(ctx, count, zbuffer, zValues, mask);
+ }
+ }
+ else {
+ /* read depth values from buffer, test, write back */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort zbuffer[MAX_WIDTH];
+ rb->GetRow(ctx, rb, count, x, y, zbuffer);
+ passed = depth_test_span16(ctx, count, zbuffer, zValues, mask);
+ rb->PutRow(ctx, rb, count, x, y, zbuffer, mask);
+ }
+ else {
+ GLuint zbuffer[MAX_WIDTH];
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, count, x, y, zbuffer);
+ passed = depth_test_span32(ctx, count, zbuffer, zValues, mask);
+ rb->PutRow(ctx, rb, count, x, y, zbuffer, mask);
+ }
+ }
+
+ if (passed < count) {
+ span->writeAll = GL_FALSE;
+ }
+ return passed;
+}
+
+
+
+#define Z_ADDRESS(X, Y) (zStart + (Y) * stride + (X))
+
+
+/*
+ * Do depth testing for an array of fragments at assorted locations.
+ */
+static void
+direct_depth_test_pixels16(struct gl_context *ctx, GLushort *zStart, GLuint stride,
+ GLuint n, const GLint x[], const GLint y[],
+ const GLuint z[], GLubyte mask[] )
+{
+ /* switch cases ordered from most frequent to less frequent */
+ switch (ctx->Depth.Func) {
+ case GL_LESS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] < *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] < *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] <= *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] <= *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] >= *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] >= *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GREATER:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] > *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] > *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] != *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] != *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_EQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] == *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] == *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLushort *zptr = Z_ADDRESS(x[i], y[i]);
+ *zptr = z[i];
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer or mask */
+ }
+ break;
+ case GL_NEVER:
+ /* depth test never passes */
+ memset(mask, 0, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in direct_depth_test_pixels");
+ }
+}
+
+
+
+/*
+ * Do depth testing for an array of fragments with direct access to zbuffer.
+ */
+static void
+direct_depth_test_pixels32(struct gl_context *ctx, GLuint *zStart, GLuint stride,
+ GLuint n, const GLint x[], const GLint y[],
+ const GLuint z[], GLubyte mask[] )
+{
+ /* switch cases ordered from most frequent to less frequent */
+ switch (ctx->Depth.Func) {
+ case GL_LESS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] < *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] < *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] <= *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] <= *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] >= *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] >= *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_GREATER:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] > *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] > *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] != *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] != *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_EQUAL:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] == *zptr) {
+ /* pass */
+ *zptr = z[i];
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ if (z[i] == *zptr) {
+ /* pass */
+ }
+ else {
+ /* fail */
+ mask[i] = 0;
+ }
+ }
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ if (ctx->Depth.Mask) {
+ /* Update Z buffer */
+ GLuint i;
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ GLuint *zptr = Z_ADDRESS(x[i], y[i]);
+ *zptr = z[i];
+ }
+ }
+ }
+ else {
+ /* Don't update Z buffer or mask */
+ }
+ break;
+ case GL_NEVER:
+ /* depth test never passes */
+ memset(mask, 0, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in direct_depth_test_pixels");
+ }
+}
+
+
+
+
+static GLuint
+depth_test_pixels( struct gl_context *ctx, SWspan *span )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ const GLuint count = span->end;
+ const GLint *x = span->array->x;
+ const GLint *y = span->array->y;
+ const GLuint *z = span->array->z;
+ GLubyte *mask = span->array->mask;
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* Directly access values */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort *zStart = (GLushort *) rb->Data;
+ GLuint stride = rb->Width;
+ direct_depth_test_pixels16(ctx, zStart, stride, count, x, y, z, mask);
+ }
+ else {
+ GLuint *zStart = (GLuint *) rb->Data;
+ GLuint stride = rb->Width;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ direct_depth_test_pixels32(ctx, zStart, stride, count, x, y, z, mask);
+ }
+ }
+ else {
+ /* read depth values from buffer, test, write back */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort zbuffer[MAX_WIDTH];
+ _swrast_get_values(ctx, rb, count, x, y, zbuffer, sizeof(GLushort));
+ depth_test_span16(ctx, count, zbuffer, z, mask);
+ rb->PutValues(ctx, rb, count, x, y, zbuffer, mask);
+ }
+ else {
+ GLuint zbuffer[MAX_WIDTH];
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ _swrast_get_values(ctx, rb, count, x, y, zbuffer, sizeof(GLuint));
+ depth_test_span32(ctx, count, zbuffer, z, mask);
+ rb->PutValues(ctx, rb, count, x, y, zbuffer, mask);
+ }
+ }
+
+ return count; /* not really correct, but OK */
+}
+
+
+/**
+ * Apply depth (Z) buffer testing to the span.
+ * \return approx number of pixels that passed (only zero is reliable)
+ */
+GLuint
+_swrast_depth_test_span( struct gl_context *ctx, SWspan *span)
+{
+ if (span->arrayMask & SPAN_XY)
+ return depth_test_pixels(ctx, span);
+ else
+ return depth_test_span(ctx, span);
+}
+
+
+/**
+ * GL_EXT_depth_bounds_test extension.
+ * Discard fragments depending on whether the corresponding Z-buffer
+ * values are outside the depth bounds test range.
+ * Note: we test the Z buffer values, not the fragment Z values!
+ * \return GL_TRUE if any fragments pass, GL_FALSE if no fragments pass
+ */
+GLboolean
+_swrast_depth_bounds_test( struct gl_context *ctx, SWspan *span )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ GLuint zMin = (GLuint) (ctx->Depth.BoundsMin * fb->_DepthMaxF + 0.5F);
+ GLuint zMax = (GLuint) (ctx->Depth.BoundsMax * fb->_DepthMaxF + 0.5F);
+ GLubyte *mask = span->array->mask;
+ const GLuint count = span->end;
+ GLuint i;
+ GLboolean anyPass = GL_FALSE;
+
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ /* get 16-bit values */
+ GLushort zbuffer16[MAX_WIDTH], *zbuffer;
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, count, span->array->x, span->array->y,
+ zbuffer16, sizeof(GLushort));
+ zbuffer = zbuffer16;
+ }
+ else {
+ zbuffer = (GLushort*) rb->GetPointer(ctx, rb, span->x, span->y);
+ if (!zbuffer) {
+ rb->GetRow(ctx, rb, count, span->x, span->y, zbuffer16);
+ zbuffer = zbuffer16;
+ }
+ }
+ assert(zbuffer);
+
+ /* Now do the tests */
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ if (zbuffer[i] < zMin || zbuffer[i] > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ else {
+ /* get 32-bit values */
+ GLuint zbuffer32[MAX_WIDTH], *zbuffer;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, count, span->array->x, span->array->y,
+ zbuffer32, sizeof(GLuint));
+ zbuffer = zbuffer32;
+ }
+ else {
+ zbuffer = (GLuint*) rb->GetPointer(ctx, rb, span->x, span->y);
+ if (!zbuffer) {
+ rb->GetRow(ctx, rb, count, span->x, span->y, zbuffer32);
+ zbuffer = zbuffer32;
+ }
+ }
+ assert(zbuffer);
+
+ /* Now do the tests */
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ if (zbuffer[i] < zMin || zbuffer[i] > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+
+ return anyPass;
+}
+
+
+
+/**********************************************************************/
+/***** Read Depth Buffer *****/
+/**********************************************************************/
+
+
+/**
+ * Read a span of depth values from the given depth renderbuffer, returning
+ * the values as GLfloats.
+ * This function does clipping to prevent reading outside the depth buffer's
+ * bounds. Though the clipping is redundant when we're called from
+ * _swrast_ReadPixels.
+ */
+void
+_swrast_read_depth_span_float( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLfloat depth[] )
+{
+ const GLfloat scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+
+ if (!rb) {
+ /* really only doing this to prevent FP exceptions later */
+ memset(depth, 0, n * sizeof(GLfloat));
+ return;
+ }
+
+ ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT);
+
+ if (y < 0 || y >= (GLint) rb->Height ||
+ x + n <= 0 || x >= (GLint) rb->Width) {
+ /* span is completely outside framebuffer */
+ memset(depth, 0, n * sizeof(GLfloat));
+ return;
+ }
+
+ if (x < 0) {
+ GLint dx = -x;
+ GLint i;
+ for (i = 0; i < dx; i++)
+ depth[i] = 0.0;
+ x = 0;
+ n -= dx;
+ depth += dx;
+ }
+ if (x + n > (GLint) rb->Width) {
+ GLint dx = x + n - (GLint) rb->Width;
+ GLint i;
+ for (i = 0; i < dx; i++)
+ depth[n - i - 1] = 0.0;
+ n -= dx;
+ }
+ if (n <= 0) {
+ return;
+ }
+
+ if (rb->DataType == GL_UNSIGNED_INT) {
+ GLuint temp[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, n, x, y, temp);
+ for (i = 0; i < n; i++) {
+ depth[i] = temp[i] * scale;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort temp[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, n, x, y, temp);
+ for (i = 0; i < n; i++) {
+ depth[i] = temp[i] * scale;
+ }
+ }
+ else {
+ _mesa_problem(ctx, "Invalid depth renderbuffer data type");
+ }
+}
+
+
+/**
+ * As above, but return 32-bit GLuint values.
+ */
+void
+_swrast_read_depth_span_uint( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLuint depth[] )
+{
+ GLuint depthBits;
+
+ if (!rb) {
+ /* really only doing this to prevent FP exceptions later */
+ memset(depth, 0, n * sizeof(GLuint));
+ return;
+ }
+
+ depthBits = _mesa_get_format_bits(rb->Format, GL_DEPTH_BITS);
+
+ ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT);
+
+ if (y < 0 || y >= (GLint) rb->Height ||
+ x + n <= 0 || x >= (GLint) rb->Width) {
+ /* span is completely outside framebuffer */
+ memset(depth, 0, n * sizeof(GLfloat));
+ return;
+ }
+
+ if (x < 0) {
+ GLint dx = -x;
+ GLint i;
+ for (i = 0; i < dx; i++)
+ depth[i] = 0;
+ x = 0;
+ n -= dx;
+ depth += dx;
+ }
+ if (x + n > (GLint) rb->Width) {
+ GLint dx = x + n - (GLint) rb->Width;
+ GLint i;
+ for (i = 0; i < dx; i++)
+ depth[n - i - 1] = 0;
+ n -= dx;
+ }
+ if (n <= 0) {
+ return;
+ }
+
+ if (rb->DataType == GL_UNSIGNED_INT) {
+ rb->GetRow(ctx, rb, n, x, y, depth);
+ if (depthBits < 32) {
+ GLuint shift = 32 - depthBits;
+ GLint i;
+ for (i = 0; i < n; i++) {
+ GLuint z = depth[i];
+ depth[i] = z << shift; /* XXX lsb bits? */
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort temp[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, n, x, y, temp);
+ if (depthBits == 16) {
+ for (i = 0; i < n; i++) {
+ GLuint z = temp[i];
+ depth[i] = (z << 16) | z;
+ }
+ }
+ else {
+ GLuint shift = 16 - depthBits;
+ for (i = 0; i < n; i++) {
+ GLuint z = temp[i];
+ depth[i] = (z << (shift + 16)) | (z << shift); /* XXX lsb bits? */
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "Invalid depth renderbuffer data type");
+ }
+}
+
+
+
+/**
+ * Clear the given z/depth renderbuffer.
+ */
+void
+_swrast_clear_depth_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
+{
+ GLuint clearValue;
+ GLint x, y, width, height;
+
+ if (!rb || !ctx->Depth.Mask) {
+ /* no depth buffer, or writing to it is disabled */
+ return;
+ }
+
+ /* compute integer clearing value */
+ if (ctx->Depth.Clear == 1.0) {
+ clearValue = ctx->DrawBuffer->_DepthMax;
+ }
+ else {
+ clearValue = (GLuint) (ctx->Depth.Clear * ctx->DrawBuffer->_DepthMaxF);
+ }
+
+ assert(rb->_BaseFormat == GL_DEPTH_COMPONENT);
+
+ /* compute region to clear */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* Direct buffer access is possible. Either this is just malloc'd
+ * memory, or perhaps the driver mmap'd the zbuffer memory.
+ */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ if ((clearValue & 0xff) == ((clearValue >> 8) & 0xff) &&
+ ((GLushort *) rb->GetPointer(ctx, rb, 0, 0) + width ==
+ (GLushort *) rb->GetPointer(ctx, rb, 0, 1))) {
+ /* optimized case */
+ GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y);
+ GLuint len = width * height * sizeof(GLushort);
+ memset(dst, (clearValue & 0xff), len);
+ }
+ else {
+ /* general case */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ dst[j] = clearValue;
+ }
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (i = 0; i < height; i++) {
+ GLuint *dst = (GLuint *) rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ dst[j] = clearValue;
+ }
+ }
+ }
+ }
+ else {
+ /* Direct access not possible. Use PutRow to write new values. */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort clearVal16 = (GLushort) (clearValue & 0xffff);
+ GLint i;
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, &clearVal16, NULL);
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ GLint i;
+ ASSERT(sizeof(clearValue) == sizeof(GLuint));
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, &clearValue, NULL);
+ }
+ }
+ else {
+ _mesa_problem(ctx, "bad depth renderbuffer DataType");
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_depth.h b/mesalib/src/mesa/swrast/s_depth.h index 878d242f5..a35ed66bc 100644 --- a/mesalib/src/mesa/swrast/s_depth.h +++ b/mesalib/src/mesa/swrast/s_depth.h @@ -1,58 +1,61 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.1 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_DEPTH_H -#define S_DEPTH_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern GLuint -_swrast_depth_test_span( GLcontext *ctx, SWspan *span); - -extern void -_swrast_depth_clamp_span( GLcontext *ctx, SWspan *span ); - -extern GLboolean -_swrast_depth_bounds_test( GLcontext *ctx, SWspan *span ); - - -extern void -_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLfloat depth[] ); - - -extern void -_swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLuint depth[] ); - - -extern void -_swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.1
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_DEPTH_H
+#define S_DEPTH_H
+
+
+#include "main/glheader.h"
+#include "s_span.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+extern GLuint
+_swrast_depth_test_span( struct gl_context *ctx, SWspan *span);
+
+extern void
+_swrast_depth_clamp_span( struct gl_context *ctx, SWspan *span );
+
+extern GLboolean
+_swrast_depth_bounds_test( struct gl_context *ctx, SWspan *span );
+
+
+extern void
+_swrast_read_depth_span_float( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLfloat depth[] );
+
+
+extern void
+_swrast_read_depth_span_uint( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLuint depth[] );
+
+
+extern void
+_swrast_clear_depth_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_drawpix.c b/mesalib/src/mesa/swrast/s_drawpix.c index 3cec3a7a2..cca75784a 100644 --- a/mesalib/src/mesa/swrast/s_drawpix.c +++ b/mesalib/src/mesa/swrast/s_drawpix.c @@ -1,824 +1,752 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/bufferobj.h" -#include "main/condrender.h" -#include "main/context.h" -#include "main/convolve.h" -#include "main/image.h" -#include "main/macros.h" -#include "main/imports.h" -#include "main/state.h" - -#include "s_context.h" -#include "s_span.h" -#include "s_stencil.h" -#include "s_zoom.h" - - - -/** - * Try to do a fast and simple RGB(a) glDrawPixels. - * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead - */ -static GLboolean -fast_draw_rgba_pixels(GLcontext *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *userUnpack, - const GLvoid *pixels) -{ - const GLint imgX = x, imgY = y; - struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; - GLenum rbType; - SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan span; - GLboolean simpleZoom; - GLint yStep; /* +1 or -1 */ - struct gl_pixelstore_attrib unpack; - GLint destX, destY, drawWidth, drawHeight; /* post clipping */ - - if (!rb) - return GL_TRUE; /* no-op */ - - rbType = rb->DataType; - - if ((swrast->_RasterMask & ~CLIP_BIT) || - ctx->Texture._EnabledCoordUnits || - userUnpack->SwapBytes || - ctx->_ImageTransferState) { - /* can't handle any of those conditions */ - return GL_FALSE; - } - - INIT_SPAN(span, GL_BITMAP); - span.arrayMask = SPAN_RGBA; - span.arrayAttribs = FRAG_BIT_COL0; - _swrast_span_default_attribs(ctx, &span); - - /* copy input params since clipping may change them */ - unpack = *userUnpack; - destX = x; - destY = y; - drawWidth = width; - drawHeight = height; - - /* check for simple zooming and clipping */ - if (ctx->Pixel.ZoomX == 1.0F && - (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) { - if (!_mesa_clip_drawpixels(ctx, &destX, &destY, - &drawWidth, &drawHeight, &unpack)) { - /* image was completely clipped: no-op, all done */ - return GL_TRUE; - } - simpleZoom = GL_TRUE; - yStep = (GLint) ctx->Pixel.ZoomY; - ASSERT(yStep == 1 || yStep == -1); - } - else { - /* non-simple zooming */ - simpleZoom = GL_FALSE; - yStep = 1; - if (unpack.RowLength == 0) - unpack.RowLength = width; - } - - /* - * Ready to draw! - */ - - if (format == GL_RGBA && type == rbType) { - const GLubyte *src - = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width, - height, format, type, 0, 0); - const GLint srcStride = _mesa_image_row_stride(&unpack, width, - format, type); - if (simpleZoom) { - GLint row; - for (row = 0; row < drawHeight; row++) { - rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL); - src += srcStride; - destY += yStep; - } - } - else { - /* with zooming */ - GLint row; - for (row = 0; row < drawHeight; row++) { - span.x = destX; - span.y = destY + row; - span.end = drawWidth; - span.array->ChanType = rbType; - _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src); - src += srcStride; - } - span.array->ChanType = CHAN_TYPE; - } - return GL_TRUE; - } - - if (format == GL_RGB && type == rbType) { - const GLubyte *src - = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width, - height, format, type, 0, 0); - const GLint srcStride = _mesa_image_row_stride(&unpack, width, - format, type); - if (simpleZoom) { - GLint row; - for (row = 0; row < drawHeight; row++) { - rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL); - src += srcStride; - destY += yStep; - } - } - else { - /* with zooming */ - GLint row; - for (row = 0; row < drawHeight; row++) { - span.x = destX; - span.y = destY; - span.end = drawWidth; - span.array->ChanType = rbType; - _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src); - src += srcStride; - destY++; - } - span.array->ChanType = CHAN_TYPE; - } - return GL_TRUE; - } - - /* Remaining cases haven't been tested with alignment != 1 */ - if (userUnpack->Alignment != 1) - return GL_FALSE; - - if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) { - const GLchan *src = (const GLchan *) pixels - + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels); - if (simpleZoom) { - /* no zooming */ - GLint row; - ASSERT(drawWidth <= MAX_WIDTH); - for (row = 0; row < drawHeight; row++) { - GLchan rgb[MAX_WIDTH][3]; - GLint i; - for (i = 0;i<drawWidth;i++) { - rgb[i][0] = src[i]; - rgb[i][1] = src[i]; - rgb[i][2] = src[i]; - } - rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL); - src += unpack.RowLength; - destY += yStep; - } - } - else { - /* with zooming */ - GLint row; - ASSERT(drawWidth <= MAX_WIDTH); - for (row = 0; row < drawHeight; row++) { - GLchan rgb[MAX_WIDTH][3]; - GLint i; - for (i = 0;i<drawWidth;i++) { - rgb[i][0] = src[i]; - rgb[i][1] = src[i]; - rgb[i][2] = src[i]; - } - span.x = destX; - span.y = destY; - span.end = drawWidth; - _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb); - src += unpack.RowLength; - destY++; - } - } - return GL_TRUE; - } - - if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) { - const GLchan *src = (const GLchan *) pixels - + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2; - if (simpleZoom) { - GLint row; - ASSERT(drawWidth <= MAX_WIDTH); - for (row = 0; row < drawHeight; row++) { - GLint i; - const GLchan *ptr = src; - for (i = 0;i<drawWidth;i++) { - span.array->rgba[i][0] = *ptr; - span.array->rgba[i][1] = *ptr; - span.array->rgba[i][2] = *ptr++; - span.array->rgba[i][3] = *ptr++; - } - rb->PutRow(ctx, rb, drawWidth, destX, destY, - span.array->rgba, NULL); - src += unpack.RowLength*2; - destY += yStep; - } - } - else { - /* with zooming */ - GLint row; - ASSERT(drawWidth <= MAX_WIDTH); - for (row = 0; row < drawHeight; row++) { - const GLchan *ptr = src; - GLint i; - for (i = 0;i<drawWidth;i++) { - span.array->rgba[i][0] = *ptr; - span.array->rgba[i][1] = *ptr; - span.array->rgba[i][2] = *ptr++; - span.array->rgba[i][3] = *ptr++; - } - span.x = destX; - span.y = destY; - span.end = drawWidth; - _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, - span.array->rgba); - src += unpack.RowLength*2; - destY++; - } - } - return GL_TRUE; - } - - if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) { - const GLubyte *src = (const GLubyte *) pixels - + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels; - if (rbType == GL_UNSIGNED_BYTE) { - /* convert ubyte/CI data to ubyte/RGBA */ - if (simpleZoom) { - GLint row; - for (row = 0; row < drawHeight; row++) { - ASSERT(drawWidth <= MAX_WIDTH); - _mesa_map_ci8_to_rgba8(ctx, drawWidth, src, - span.array->rgba8); - rb->PutRow(ctx, rb, drawWidth, destX, destY, - span.array->rgba8, NULL); - src += unpack.RowLength; - destY += yStep; - } - } - else { - /* ubyte/CI to ubyte/RGBA with zooming */ - GLint row; - for (row = 0; row < drawHeight; row++) { - ASSERT(drawWidth <= MAX_WIDTH); - _mesa_map_ci8_to_rgba8(ctx, drawWidth, src, - span.array->rgba8); - span.x = destX; - span.y = destY; - span.end = drawWidth; - _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, - span.array->rgba8); - src += unpack.RowLength; - destY++; - } - } - return GL_TRUE; - } - } - - /* can't handle this pixel format and/or data type */ - return GL_FALSE; -} - - - -/* - * Draw stencil image. - */ -static void -draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels ) -{ - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; - GLint skipPixels; - - /* if width > MAX_WIDTH, have to process image in chunks */ - skipPixels = 0; - while (skipPixels < width) { - const GLint spanX = x + skipPixels; - const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); - GLint row; - for (row = 0; row < height; row++) { - const GLint spanY = y + row; - GLstencil values[MAX_WIDTH]; - GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte)) - ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT; - const GLvoid *source = _mesa_image_address2d(unpack, pixels, - width, height, - GL_COLOR_INDEX, type, - row, skipPixels); - _mesa_unpack_stencil_span(ctx, spanWidth, destType, values, - type, source, unpack, - ctx->_ImageTransferState); - if (zoom) { - _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth, - spanX, spanY, values); - } - else { - _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values); - } - } - skipPixels += spanWidth; - } -} - - -/* - * Draw depth image. - */ -static void -draw_depth_pixels( GLcontext *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels ) -{ - const GLboolean scaleOrBias - = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; - SWspan span; - - INIT_SPAN(span, GL_BITMAP); - span.arrayMask = SPAN_Z; - _swrast_span_default_attribs(ctx, &span); - - if (type == GL_UNSIGNED_SHORT - && ctx->DrawBuffer->Visual.depthBits == 16 - && !scaleOrBias - && !zoom - && width <= MAX_WIDTH - && !unpack->SwapBytes) { - /* Special case: directly write 16-bit depth values */ - GLint row; - for (row = 0; row < height; row++) { - const GLushort *zSrc = (const GLushort *) - _mesa_image_address2d(unpack, pixels, width, height, - GL_DEPTH_COMPONENT, type, row, 0); - GLint i; - for (i = 0; i < width; i++) - span.array->z[i] = zSrc[i]; - span.x = x; - span.y = y + row; - span.end = width; - _swrast_write_rgba_span(ctx, &span); - } - } - else if (type == GL_UNSIGNED_INT - && !scaleOrBias - && !zoom - && width <= MAX_WIDTH - && !unpack->SwapBytes) { - /* Special case: shift 32-bit values down to Visual.depthBits */ - const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits; - GLint row; - for (row = 0; row < height; row++) { - const GLuint *zSrc = (const GLuint *) - _mesa_image_address2d(unpack, pixels, width, height, - GL_DEPTH_COMPONENT, type, row, 0); - if (shift == 0) { - memcpy(span.array->z, zSrc, width * sizeof(GLuint)); - } - else { - GLint col; - for (col = 0; col < width; col++) - span.array->z[col] = zSrc[col] >> shift; - } - span.x = x; - span.y = y + row; - span.end = width; - _swrast_write_rgba_span(ctx, &span); - } - } - else { - /* General case */ - const GLuint depthMax = ctx->DrawBuffer->_DepthMax; - GLint skipPixels = 0; - - /* in case width > MAX_WIDTH do the copy in chunks */ - while (skipPixels < width) { - const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); - GLint row; - ASSERT(span.end <= MAX_WIDTH); - for (row = 0; row < height; row++) { - const GLvoid *zSrc = _mesa_image_address2d(unpack, - pixels, width, height, - GL_DEPTH_COMPONENT, type, - row, skipPixels); - - /* Set these for each row since the _swrast_write_* function may - * change them while clipping. - */ - span.x = x + skipPixels; - span.y = y + row; - span.end = spanWidth; - - _mesa_unpack_depth_span(ctx, spanWidth, - GL_UNSIGNED_INT, span.array->z, depthMax, - type, zSrc, unpack); - if (zoom) { - _swrast_write_zoomed_depth_span(ctx, x, y, &span); - } - else { - _swrast_write_rgba_span(ctx, &span); - } - } - skipPixels += spanWidth; - } - } -} - - - -/** - * Draw RGBA image. - */ -static void -draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels ) -{ - const GLint imgX = x, imgY = y; - const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0; - GLfloat *convImage = NULL; - GLbitfield transferOps = ctx->_ImageTransferState; - SWspan span; - - /* Try an optimized glDrawPixels first */ - if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type, - unpack, pixels)) { - return; - } - - INIT_SPAN(span, GL_BITMAP); - _swrast_span_default_attribs(ctx, &span); - span.arrayMask = SPAN_RGBA; - span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */ - - if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { - /* Convolution has to be handled specially. We'll create an - * intermediate image, applying all pixel transfer operations - * up to convolution. Then we'll convolve the image. Then - * we'll proceed with the rest of the transfer operations and - * rasterize the image. - */ - GLint row; - GLfloat *dest, *tmpImage; - - tmpImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!tmpImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); - return; - } - convImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!convImage) { - free(tmpImage); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); - return; - } - - /* Unpack the image and apply transfer ops up to convolution */ - dest = tmpImage; - for (row = 0; row < height; row++) { - const GLvoid *source = _mesa_image_address2d(unpack, - pixels, width, height, format, type, row, 0); - _mesa_unpack_color_span_float(ctx, width, GL_RGBA, (GLfloat *) dest, - format, type, source, unpack, - transferOps & IMAGE_PRE_CONVOLUTION_BITS); - dest += width * 4; - } - - /* do convolution */ - if (ctx->Pixel.Convolution2DEnabled) { - _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage); - } - else { - ASSERT(ctx->Pixel.Separable2DEnabled); - _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage); - } - free(tmpImage); - - /* continue transfer ops and draw the convolved image */ - unpack = &ctx->DefaultPacking; - pixels = convImage; - format = GL_RGBA; - type = GL_FLOAT; - transferOps &= IMAGE_POST_CONVOLUTION_BITS; - } - else if (ctx->Pixel.Convolution1DEnabled) { - /* we only want to apply 1D convolution to glTexImage1D */ - transferOps &= ~(IMAGE_CONVOLUTION_BIT | - IMAGE_POST_CONVOLUTION_SCALE_BIAS); - } - - if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 && - ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT && - ctx->Color.ClampFragmentColor != GL_FALSE) { - /* need to clamp colors before applying fragment ops */ - transferOps |= IMAGE_CLAMP_BIT; - } - - /* - * General solution - */ - { - const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) - || (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink); - const GLbitfield interpMask = span.interpMask; - const GLbitfield arrayMask = span.arrayMask; - const GLint srcStride - = _mesa_image_row_stride(unpack, width, format, type); - GLint skipPixels = 0; - /* use span array for temp color storage */ - GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0]; - - /* if the span is wider than MAX_WIDTH we have to do it in chunks */ - while (skipPixels < width) { - const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); - const GLubyte *source - = (const GLubyte *) _mesa_image_address2d(unpack, pixels, - width, height, format, - type, 0, skipPixels); - GLint row; - - for (row = 0; row < height; row++) { - /* get image row as float/RGBA */ - _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba, - format, type, source, unpack, - transferOps); - /* draw the span */ - if (!sink) { - /* Set these for each row since the _swrast_write_* functions - * may change them while clipping/rendering. - */ - span.array->ChanType = GL_FLOAT; - span.x = x + skipPixels; - span.y = y + row; - span.end = spanWidth; - span.arrayMask = arrayMask; - span.interpMask = interpMask; - if (zoom) { - _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba); - } - else { - _swrast_write_rgba_span(ctx, &span); - } - } - - source += srcStride; - } /* for row */ - - skipPixels += spanWidth; - } /* while skipPixels < width */ - - /* XXX this is ugly/temporary, to undo above change */ - span.array->ChanType = CHAN_TYPE; - } - - if (convImage) { - free(convImage); - } -} - - -/** - * This is a bit different from drawing GL_DEPTH_COMPONENT pixels. - * The only per-pixel operations that apply are depth scale/bias, - * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK, - * and pixel zoom. - * Also, only the depth buffer and stencil buffers are touched, not the - * color buffer(s). - */ -static void -draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels) -{ - const GLint imgX = x, imgY = y; - const GLboolean scaleOrBias - = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; - const GLuint depthMax = ctx->DrawBuffer->_DepthMax; - const GLuint stencilMask = ctx->Stencil.WriteMask[0]; - const GLuint stencilType = (STENCIL_BITS == 8) ? - GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; - struct gl_renderbuffer *depthRb, *stencilRb; - struct gl_pixelstore_attrib clippedUnpack = *unpack; - - if (!zoom) { - if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, - &clippedUnpack)) { - /* totally clipped */ - return; - } - } - - depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; - stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; - ASSERT(depthRb); - ASSERT(stencilRb); - - if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && - stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && - depthRb == stencilRb && - !scaleOrBias && - !zoom && - ctx->Depth.Mask && - (stencilMask & 0xff) == 0xff) { - /* This is the ideal case. - * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer. - * Plus, no pixel transfer ops, zooming, or masking needed. - */ - GLint i; - for (i = 0; i < height; i++) { - const GLuint *src = (const GLuint *) - _mesa_image_address2d(&clippedUnpack, pixels, width, height, - GL_DEPTH_STENCIL_EXT, type, i, 0); - depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL); - } - } - else { - /* sub-optimal cases: - * Separate depth/stencil buffers, or pixel transfer ops required. - */ - /* XXX need to handle very wide images (skippixels) */ - GLint i; - - depthRb = ctx->DrawBuffer->_DepthBuffer; - stencilRb = ctx->DrawBuffer->_StencilBuffer; - - for (i = 0; i < height; i++) { - const GLuint *depthStencilSrc = (const GLuint *) - _mesa_image_address2d(&clippedUnpack, pixels, width, height, - GL_DEPTH_STENCIL_EXT, type, i, 0); - - if (ctx->Depth.Mask) { - if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) { - /* fast path 24-bit zbuffer */ - GLuint zValues[MAX_WIDTH]; - GLint j; - ASSERT(depthRb->DataType == GL_UNSIGNED_INT); - for (j = 0; j < width; j++) { - zValues[j] = depthStencilSrc[j] >> 8; - } - if (zoom) - _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, - x, y + i, zValues); - else - depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); - } - else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) { - /* fast path 16-bit zbuffer */ - GLushort zValues[MAX_WIDTH]; - GLint j; - ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT); - for (j = 0; j < width; j++) { - zValues[j] = depthStencilSrc[j] >> 16; - } - if (zoom) - _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, - x, y + i, zValues); - else - depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); - } - else { - /* general case */ - GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */ - _mesa_unpack_depth_span(ctx, width, - depthRb->DataType, zValues, depthMax, - type, depthStencilSrc, &clippedUnpack); - if (zoom) { - _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x, - y + i, zValues); - } - else { - depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); - } - } - } - - if (stencilMask != 0x0) { - GLstencil stencilValues[MAX_WIDTH]; - /* get stencil values, with shift/offset/mapping */ - _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues, - type, depthStencilSrc, &clippedUnpack, - ctx->_ImageTransferState); - if (zoom) - _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width, - x, y + i, stencilValues); - else - _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues); - } - } - } -} - - -/** - * Execute software-based glDrawPixels. - * By time we get here, all error checking will have been done. - */ -void -_swrast_DrawPixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLboolean save_vp_override = ctx->VertexProgram._Overriden; - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't draw */ - - /* We are creating fragments directly, without going through vertex - * programs. - * - * This override flag tells the fragment processing code that its input - * comes from a non-standard source, and it may therefore not rely on - * optimizations that assume e.g. constant color if there is no color - * vertex array. - */ - _mesa_set_vp_override(ctx, GL_TRUE); - - swrast_render_start(ctx); - - if (ctx->NewState) - _mesa_update_state(ctx); - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - pixels = _mesa_map_pbo_source(ctx, unpack, pixels); - if (!pixels) { - swrast_render_finish(ctx); - _mesa_set_vp_override(ctx, save_vp_override); - return; - } - - switch (format) { - case GL_STENCIL_INDEX: - draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels ); - break; - case GL_DEPTH_COMPONENT: - draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels ); - break; - case GL_COLOR_INDEX: - case GL_RED: - case GL_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_LUMINANCE: - case GL_LUMINANCE_ALPHA: - case GL_RGB: - case GL_BGR: - case GL_RGBA: - case GL_BGRA: - case GL_ABGR_EXT: - draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels); - break; - case GL_DEPTH_STENCIL_EXT: - draw_depth_stencil_pixels(ctx, x, y, width, height, - type, unpack, pixels); - break; - default: - _mesa_problem(ctx, "unexpected format in _swrast_DrawPixels"); - /* don't return yet, clean-up */ - } - - swrast_render_finish(ctx); - _mesa_set_vp_override(ctx, save_vp_override); - - _mesa_unmap_pbo_source(ctx, unpack); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/condrender.h"
+#include "main/context.h"
+#include "main/image.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/pack.h"
+#include "main/pixeltransfer.h"
+#include "main/state.h"
+
+#include "s_context.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+
+/**
+ * Try to do a fast and simple RGB(a) glDrawPixels.
+ * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
+ */
+static GLboolean
+fast_draw_rgba_pixels(struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *userUnpack,
+ const GLvoid *pixels)
+{
+ const GLint imgX = x, imgY = y;
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
+ GLenum rbType;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLboolean simpleZoom;
+ GLint yStep; /* +1 or -1 */
+ struct gl_pixelstore_attrib unpack;
+ GLint destX, destY, drawWidth, drawHeight; /* post clipping */
+
+ if (!rb)
+ return GL_TRUE; /* no-op */
+
+ rbType = rb->DataType;
+
+ if ((swrast->_RasterMask & ~CLIP_BIT) ||
+ ctx->Texture._EnabledCoordUnits ||
+ userUnpack->SwapBytes ||
+ ctx->_ImageTransferState) {
+ /* can't handle any of those conditions */
+ return GL_FALSE;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0;
+ _swrast_span_default_attribs(ctx, &span);
+
+ /* copy input params since clipping may change them */
+ unpack = *userUnpack;
+ destX = x;
+ destY = y;
+ drawWidth = width;
+ drawHeight = height;
+
+ /* check for simple zooming and clipping */
+ if (ctx->Pixel.ZoomX == 1.0F &&
+ (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) {
+ if (!_mesa_clip_drawpixels(ctx, &destX, &destY,
+ &drawWidth, &drawHeight, &unpack)) {
+ /* image was completely clipped: no-op, all done */
+ return GL_TRUE;
+ }
+ simpleZoom = GL_TRUE;
+ yStep = (GLint) ctx->Pixel.ZoomY;
+ ASSERT(yStep == 1 || yStep == -1);
+ }
+ else {
+ /* non-simple zooming */
+ simpleZoom = GL_FALSE;
+ yStep = 1;
+ if (unpack.RowLength == 0)
+ unpack.RowLength = width;
+ }
+
+ /*
+ * Ready to draw!
+ */
+
+ if (format == GL_RGBA && type == rbType) {
+ const GLubyte *src
+ = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
+ height, format, type, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(&unpack, width,
+ format, type);
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += srcStride;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ span.x = destX;
+ span.y = destY + row;
+ span.end = drawWidth;
+ span.array->ChanType = rbType;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src);
+ src += srcStride;
+ }
+ span.array->ChanType = CHAN_TYPE;
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_RGB && type == rbType) {
+ const GLubyte *src
+ = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
+ height, format, type, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(&unpack, width,
+ format, type);
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += srcStride;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ span.array->ChanType = rbType;
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src);
+ src += srcStride;
+ destY++;
+ }
+ span.array->ChanType = CHAN_TYPE;
+ }
+ return GL_TRUE;
+ }
+
+ /* Remaining cases haven't been tested with alignment != 1 */
+ if (userUnpack->Alignment != 1)
+ return GL_FALSE;
+
+ if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) {
+ const GLchan *src = (const GLchan *) pixels
+ + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels);
+ if (simpleZoom) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLchan rgb[MAX_WIDTH][3];
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ rgb[i][0] = src[i];
+ rgb[i][1] = src[i];
+ rgb[i][2] = src[i];
+ }
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL);
+ src += unpack.RowLength;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLchan rgb[MAX_WIDTH][3];
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ rgb[i][0] = src[i];
+ rgb[i][1] = src[i];
+ rgb[i][2] = src[i];
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb);
+ src += unpack.RowLength;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) {
+ const GLchan *src = (const GLchan *) pixels
+ + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2;
+ if (simpleZoom) {
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLint i;
+ const GLchan *ptr = src;
+ for (i = 0;i<drawWidth;i++) {
+ span.array->rgba[i][0] = *ptr;
+ span.array->rgba[i][1] = *ptr;
+ span.array->rgba[i][2] = *ptr++;
+ span.array->rgba[i][3] = *ptr++;
+ }
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += unpack.RowLength*2;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ const GLchan *ptr = src;
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ span.array->rgba[i][0] = *ptr;
+ span.array->rgba[i][1] = *ptr;
+ span.array->rgba[i][2] = *ptr++;
+ span.array->rgba[i][3] = *ptr++;
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ span.array->rgba);
+ src += unpack.RowLength*2;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) {
+ const GLubyte *src = (const GLubyte *) pixels
+ + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels;
+ if (rbType == GL_UNSIGNED_BYTE) {
+ /* convert ubyte/CI data to ubyte/RGBA */
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
+ span.array->rgba8);
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba8, NULL);
+ src += unpack.RowLength;
+ destY += yStep;
+ }
+ }
+ else {
+ /* ubyte/CI to ubyte/RGBA with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
+ span.array->rgba8);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ span.array->rgba8);
+ src += unpack.RowLength;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+ }
+
+ /* can't handle this pixel format and/or data type */
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Draw stencil image.
+ */
+static void
+draw_stencil_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ GLint skipPixels;
+
+ /* if width > MAX_WIDTH, have to process image in chunks */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x + skipPixels;
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLint spanY = y + row;
+ GLstencil values[MAX_WIDTH];
+ GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
+ ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
+ const GLvoid *source = _mesa_image_address2d(unpack, pixels,
+ width, height,
+ GL_COLOR_INDEX, type,
+ row, skipPixels);
+ _mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
+ type, source, unpack,
+ ctx->_ImageTransferState);
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
+ spanX, spanY, values);
+ }
+ else {
+ _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
+ }
+ }
+ skipPixels += spanWidth;
+ }
+}
+
+
+/*
+ * Draw depth image.
+ */
+static void
+draw_depth_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ SWspan span;
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.arrayMask = SPAN_Z;
+ _swrast_span_default_attribs(ctx, &span);
+
+ if (type == GL_UNSIGNED_SHORT
+ && ctx->DrawBuffer->Visual.depthBits == 16
+ && !scaleOrBias
+ && !zoom
+ && width <= MAX_WIDTH
+ && !unpack->SwapBytes) {
+ /* Special case: directly write 16-bit depth values */
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLushort *zSrc = (const GLushort *)
+ _mesa_image_address2d(unpack, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, row, 0);
+ GLint i;
+ for (i = 0; i < width; i++)
+ span.array->z[i] = zSrc[i];
+ span.x = x;
+ span.y = y + row;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT
+ && !scaleOrBias
+ && !zoom
+ && width <= MAX_WIDTH
+ && !unpack->SwapBytes) {
+ /* Special case: shift 32-bit values down to Visual.depthBits */
+ const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLuint *zSrc = (const GLuint *)
+ _mesa_image_address2d(unpack, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, row, 0);
+ if (shift == 0) {
+ memcpy(span.array->z, zSrc, width * sizeof(GLuint));
+ }
+ else {
+ GLint col;
+ for (col = 0; col < width; col++)
+ span.array->z[col] = zSrc[col] >> shift;
+ }
+ span.x = x;
+ span.y = y + row;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else {
+ /* General case */
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ GLint skipPixels = 0;
+
+ /* in case width > MAX_WIDTH do the copy in chunks */
+ while (skipPixels < width) {
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+ ASSERT(span.end <= MAX_WIDTH);
+ for (row = 0; row < height; row++) {
+ const GLvoid *zSrc = _mesa_image_address2d(unpack,
+ pixels, width, height,
+ GL_DEPTH_COMPONENT, type,
+ row, skipPixels);
+
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
+
+ _mesa_unpack_depth_span(ctx, spanWidth,
+ GL_UNSIGNED_INT, span.array->z, depthMax,
+ type, zSrc, unpack);
+ if (zoom) {
+ _swrast_write_zoomed_depth_span(ctx, x, y, &span);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ skipPixels += spanWidth;
+ }
+ }
+}
+
+
+
+/**
+ * Draw RGBA image.
+ */
+static void
+draw_rgba_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLint imgX = x, imgY = y;
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ GLfloat *convImage = NULL;
+ GLbitfield transferOps = ctx->_ImageTransferState;
+ SWspan span;
+
+ /* Try an optimized glDrawPixels first */
+ if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
+ unpack, pixels)) {
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */
+
+ if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 &&
+ ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT &&
+ ctx->Color.ClampFragmentColor != GL_FALSE) {
+ /* need to clamp colors before applying fragment ops */
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+
+ /*
+ * General solution
+ */
+ {
+ const GLbitfield interpMask = span.interpMask;
+ const GLbitfield arrayMask = span.arrayMask;
+ const GLint srcStride
+ = _mesa_image_row_stride(unpack, width, format, type);
+ GLint skipPixels = 0;
+ /* use span array for temp color storage */
+ GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0];
+
+ /* if the span is wider than MAX_WIDTH we have to do it in chunks */
+ while (skipPixels < width) {
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ const GLubyte *source
+ = (const GLubyte *) _mesa_image_address2d(unpack, pixels,
+ width, height, format,
+ type, 0, skipPixels);
+ GLint row;
+
+ for (row = 0; row < height; row++) {
+ /* get image row as float/RGBA */
+ _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba,
+ format, type, source, unpack,
+ transferOps);
+ /* Set these for each row since the _swrast_write_* functions
+ * may change them while clipping/rendering.
+ */
+ span.array->ChanType = GL_FLOAT;
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
+ span.arrayMask = arrayMask;
+ span.interpMask = interpMask;
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+
+ source += srcStride;
+ } /* for row */
+
+ skipPixels += spanWidth;
+ } /* while skipPixels < width */
+
+ /* XXX this is ugly/temporary, to undo above change */
+ span.array->ChanType = CHAN_TYPE;
+ }
+
+ if (convImage) {
+ free(convImage);
+ }
+}
+
+
+/**
+ * This is a bit different from drawing GL_DEPTH_COMPONENT pixels.
+ * The only per-pixel operations that apply are depth scale/bias,
+ * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK,
+ * and pixel zoom.
+ * Also, only the depth buffer and stencil buffers are touched, not the
+ * color buffer(s).
+ */
+static void
+draw_depth_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels)
+{
+ const GLint imgX = x, imgY = y;
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+ const GLuint stencilType = (STENCIL_BITS == 8) ?
+ GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ struct gl_renderbuffer *depthRb, *stencilRb;
+ struct gl_pixelstore_attrib clippedUnpack = *unpack;
+
+ if (!zoom) {
+ if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
+ &clippedUnpack)) {
+ /* totally clipped */
+ return;
+ }
+ }
+
+ depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ ASSERT(depthRb);
+ ASSERT(stencilRb);
+
+ if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ depthRb == stencilRb &&
+ !scaleOrBias &&
+ !zoom &&
+ ctx->Depth.Mask &&
+ (stencilMask & 0xff) == 0xff) {
+ /* This is the ideal case.
+ * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer.
+ * Plus, no pixel transfer ops, zooming, or masking needed.
+ */
+ GLint i;
+ for (i = 0; i < height; i++) {
+ const GLuint *src = (const GLuint *)
+ _mesa_image_address2d(&clippedUnpack, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL);
+ }
+ }
+ else {
+ /* sub-optimal cases:
+ * Separate depth/stencil buffers, or pixel transfer ops required.
+ */
+ /* XXX need to handle very wide images (skippixels) */
+ GLint i;
+
+ depthRb = ctx->DrawBuffer->_DepthBuffer;
+ stencilRb = ctx->DrawBuffer->_StencilBuffer;
+
+ for (i = 0; i < height; i++) {
+ const GLuint *depthStencilSrc = (const GLuint *)
+ _mesa_image_address2d(&clippedUnpack, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+
+ if (ctx->Depth.Mask) {
+ if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
+ /* fast path 24-bit zbuffer */
+ GLuint zValues[MAX_WIDTH];
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < width; j++) {
+ zValues[j] = depthStencilSrc[j] >> 8;
+ }
+ if (zoom)
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
+ else
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
+ /* fast path 16-bit zbuffer */
+ GLushort zValues[MAX_WIDTH];
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT);
+ for (j = 0; j < width; j++) {
+ zValues[j] = depthStencilSrc[j] >> 16;
+ }
+ if (zoom)
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
+ else
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ else {
+ /* general case */
+ GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */
+ _mesa_unpack_depth_span(ctx, width,
+ depthRb->DataType, zValues, depthMax,
+ type, depthStencilSrc, &clippedUnpack);
+ if (zoom) {
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x,
+ y + i, zValues);
+ }
+ else {
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ }
+ }
+
+ if (stencilMask != 0x0) {
+ GLstencil stencilValues[MAX_WIDTH];
+ /* get stencil values, with shift/offset/mapping */
+ _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues,
+ type, depthStencilSrc, &clippedUnpack,
+ ctx->_ImageTransferState);
+ if (zoom)
+ _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width,
+ x, y + i, stencilValues);
+ else
+ _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues);
+ }
+ }
+ }
+}
+
+
+/**
+ * Execute software-based glDrawPixels.
+ * By time we get here, all error checking will have been done.
+ */
+void
+_swrast_DrawPixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean save_vp_override = ctx->VertexProgram._Overriden;
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't draw */
+
+ /* We are creating fragments directly, without going through vertex
+ * programs.
+ *
+ * This override flag tells the fragment processing code that its input
+ * comes from a non-standard source, and it may therefore not rely on
+ * optimizations that assume e.g. constant color if there is no color
+ * vertex array.
+ */
+ _mesa_set_vp_override(ctx, GL_TRUE);
+
+ swrast_render_start(ctx);
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
+ if (!pixels) {
+ swrast_render_finish(ctx);
+ _mesa_set_vp_override(ctx, save_vp_override);
+ return;
+ }
+
+ /*
+ * By time we get here, all error checking should have been done.
+ */
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels );
+ break;
+ case GL_DEPTH_COMPONENT:
+ draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels );
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ draw_depth_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels);
+ break;
+ default:
+ /* all other formats should be color formats */
+ draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
+ }
+
+ swrast_render_finish(ctx);
+ _mesa_set_vp_override(ctx, save_vp_override);
+
+ _mesa_unmap_pbo_source(ctx, unpack);
+}
diff --git a/mesalib/src/mesa/swrast/s_feedback.c b/mesalib/src/mesa/swrast/s_feedback.c index 6ac8ac73b..e548bf9c3 100644 --- a/mesalib/src/mesa/swrast/s_feedback.c +++ b/mesalib/src/mesa/swrast/s_feedback.c @@ -1,138 +1,138 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/feedback.h" -#include "main/macros.h" - -#include "s_context.h" -#include "s_feedback.h" -#include "s_triangle.h" - - - -static void -feedback_vertex(GLcontext * ctx, const SWvertex * v, const SWvertex * pv) -{ - GLfloat win[4]; - const GLfloat *vtc = v->attrib[FRAG_ATTRIB_TEX0]; - const GLfloat *color = v->attrib[FRAG_ATTRIB_COL0]; - - win[0] = v->attrib[FRAG_ATTRIB_WPOS][0]; - win[1] = v->attrib[FRAG_ATTRIB_WPOS][1]; - win[2] = v->attrib[FRAG_ATTRIB_WPOS][2] / ctx->DrawBuffer->_DepthMaxF; - win[3] = 1.0F / v->attrib[FRAG_ATTRIB_WPOS][3]; - - _mesa_feedback_vertex(ctx, win, color, vtc); -} - - -/* - * Put triangle in feedback buffer. - */ -void -_swrast_feedback_triangle(GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2) -{ - if (!_swrast_culltriangle(ctx, v0, v1, v2)) { - _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN); - _mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */ - - if (ctx->Light.ShadeModel == GL_SMOOTH) { - feedback_vertex(ctx, v0, v0); - feedback_vertex(ctx, v1, v1); - feedback_vertex(ctx, v2, v2); - } - else { - feedback_vertex(ctx, v0, v2); - feedback_vertex(ctx, v1, v2); - feedback_vertex(ctx, v2, v2); - } - } -} - - -void -_swrast_feedback_line(GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1) -{ - GLenum token = GL_LINE_TOKEN; - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - if (swrast->StippleCounter == 0) - token = GL_LINE_RESET_TOKEN; - - _mesa_feedback_token(ctx, (GLfloat) (GLint) token); - - if (ctx->Light.ShadeModel == GL_SMOOTH) { - feedback_vertex(ctx, v0, v0); - feedback_vertex(ctx, v1, v1); - } - else { - feedback_vertex(ctx, v0, v1); - feedback_vertex(ctx, v1, v1); - } - - swrast->StippleCounter++; -} - - -void -_swrast_feedback_point(GLcontext *ctx, const SWvertex *v) -{ - _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN); - feedback_vertex(ctx, v, v); -} - - -void -_swrast_select_triangle(GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2) -{ - if (!_swrast_culltriangle(ctx, v0, v1, v2)) { - const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; - - _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs ); - _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs ); - _mesa_update_hitflag( ctx, v2->attrib[FRAG_ATTRIB_WPOS][2] * zs ); - } -} - - -void -_swrast_select_line(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1) -{ - const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; - _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs ); - _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs ); -} - - -void -_swrast_select_point(GLcontext *ctx, const SWvertex *v) -{ - const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; - _mesa_update_hitflag( ctx, v->attrib[FRAG_ATTRIB_WPOS][2] * zs ); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/feedback.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_triangle.h"
+
+
+
+static void
+feedback_vertex(struct gl_context * ctx, const SWvertex * v, const SWvertex * pv)
+{
+ GLfloat win[4];
+ const GLfloat *vtc = v->attrib[FRAG_ATTRIB_TEX0];
+ const GLfloat *color = v->attrib[FRAG_ATTRIB_COL0];
+
+ win[0] = v->attrib[FRAG_ATTRIB_WPOS][0];
+ win[1] = v->attrib[FRAG_ATTRIB_WPOS][1];
+ win[2] = v->attrib[FRAG_ATTRIB_WPOS][2] / ctx->DrawBuffer->_DepthMaxF;
+ win[3] = 1.0F / v->attrib[FRAG_ATTRIB_WPOS][3];
+
+ _mesa_feedback_vertex(ctx, win, color, vtc);
+}
+
+
+/*
+ * Put triangle in feedback buffer.
+ */
+void
+_swrast_feedback_triangle(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2)
+{
+ if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
+ _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN);
+ _mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */
+
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ feedback_vertex(ctx, v0, v0);
+ feedback_vertex(ctx, v1, v1);
+ feedback_vertex(ctx, v2, v2);
+ }
+ else {
+ feedback_vertex(ctx, v0, v2);
+ feedback_vertex(ctx, v1, v2);
+ feedback_vertex(ctx, v2, v2);
+ }
+ }
+}
+
+
+void
+_swrast_feedback_line(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1)
+{
+ GLenum token = GL_LINE_TOKEN;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->StippleCounter == 0)
+ token = GL_LINE_RESET_TOKEN;
+
+ _mesa_feedback_token(ctx, (GLfloat) (GLint) token);
+
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ feedback_vertex(ctx, v0, v0);
+ feedback_vertex(ctx, v1, v1);
+ }
+ else {
+ feedback_vertex(ctx, v0, v1);
+ feedback_vertex(ctx, v1, v1);
+ }
+
+ swrast->StippleCounter++;
+}
+
+
+void
+_swrast_feedback_point(struct gl_context *ctx, const SWvertex *v)
+{
+ _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN);
+ feedback_vertex(ctx, v, v);
+}
+
+
+void
+_swrast_select_triangle(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2)
+{
+ if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
+ const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+
+ _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+ _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+ _mesa_update_hitflag( ctx, v2->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+ }
+}
+
+
+void
+_swrast_select_line(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1)
+{
+ const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+ _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+ _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+}
+
+
+void
+_swrast_select_point(struct gl_context *ctx, const SWvertex *v)
+{
+ const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+ _mesa_update_hitflag( ctx, v->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+}
diff --git a/mesalib/src/mesa/swrast/s_feedback.h b/mesalib/src/mesa/swrast/s_feedback.h index 9feab75db..f0ca2c0e6 100644 --- a/mesalib/src/mesa/swrast/s_feedback.h +++ b/mesalib/src/mesa/swrast/s_feedback.h @@ -1,50 +1,50 @@ - -/* - * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_FEEDBACK_H -#define S_FEEDBACK_H - - -#include "swrast.h" - - -extern void _swrast_feedback_point( GLcontext *ctx, const SWvertex *v ); - -extern void _swrast_feedback_line( GLcontext *ctx, - const SWvertex *v1, const SWvertex *v2 ); - -extern void _swrast_feedback_triangle( GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2 ); - -extern void _swrast_select_point( GLcontext *ctx, const SWvertex *v ); - -extern void _swrast_select_line( GLcontext *ctx, - const SWvertex *v1, const SWvertex *v2 ); - -extern void _swrast_select_triangle( GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2 ); - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_FEEDBACK_H
+#define S_FEEDBACK_H
+
+
+#include "swrast.h"
+
+
+extern void _swrast_feedback_point( struct gl_context *ctx, const SWvertex *v );
+
+extern void _swrast_feedback_line( struct gl_context *ctx,
+ const SWvertex *v1, const SWvertex *v2 );
+
+extern void _swrast_feedback_triangle( struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2 );
+
+extern void _swrast_select_point( struct gl_context *ctx, const SWvertex *v );
+
+extern void _swrast_select_line( struct gl_context *ctx,
+ const SWvertex *v1, const SWvertex *v2 );
+
+extern void _swrast_select_triangle( struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2 );
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_fog.c b/mesalib/src/mesa/swrast/s_fog.c index 689500a61..5acb5f4d1 100644 --- a/mesalib/src/mesa/swrast/s_fog.c +++ b/mesalib/src/mesa/swrast/s_fog.c @@ -1,244 +1,244 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/macros.h" - -#include "s_context.h" -#include "s_fog.h" - - -/** - * Used to convert current raster distance to a fog factor in [0,1]. - */ -GLfloat -_swrast_z_to_fogfactor(GLcontext *ctx, GLfloat z) -{ - GLfloat d, f; - - switch (ctx->Fog.Mode) { - case GL_LINEAR: - if (ctx->Fog.Start == ctx->Fog.End) - d = 1.0F; - else - d = 1.0F / (ctx->Fog.End - ctx->Fog.Start); - f = (ctx->Fog.End - z) * d; - return CLAMP(f, 0.0F, 1.0F); - case GL_EXP: - d = ctx->Fog.Density; - f = EXPF(-d * z); - f = CLAMP(f, 0.0F, 1.0F); - return f; - case GL_EXP2: - d = ctx->Fog.Density; - f = EXPF(-(d * d * z * z)); - f = CLAMP(f, 0.0F, 1.0F); - return f; - default: - _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor"); - return 0.0; - } -} - - -#define LINEAR_FOG(f, coord) f = (fogEnd - coord) * fogScale - -#define EXP_FOG(f, coord) f = EXPF(density * coord) - -#define EXP2_FOG(f, coord) \ -do { \ - GLfloat tmp = negDensitySquared * coord * coord; \ - if (tmp < FLT_MIN_10_EXP) \ - tmp = FLT_MIN_10_EXP; \ - f = EXPF(tmp); \ - } while(0) - - -#define BLEND_FOG(f, coord) f = coord - - - -/** - * Template code for computing fog blend factor and applying it to colors. - * \param TYPE either GLubyte, GLushort or GLfloat. - * \param COMPUTE_F code to compute the fog blend factor, f. - */ -#define FOG_LOOP(TYPE, FOG_FUNC) \ -if (span->arrayAttribs & FRAG_BIT_FOGC) { \ - GLuint i; \ - for (i = 0; i < span->end; i++) { \ - const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0]; \ - const GLfloat c = FABSF(fogCoord); \ - GLfloat f, oneMinusF; \ - FOG_FUNC(f, c); \ - f = CLAMP(f, 0.0F, 1.0F); \ - oneMinusF = 1.0F - f; \ - rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \ - rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \ - rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \ - } \ -} \ -else { \ - const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0]; \ - GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0]; \ - const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3]; \ - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; \ - GLuint i; \ - for (i = 0; i < span->end; i++) { \ - const GLfloat c = FABSF(fogCoord) / w; \ - GLfloat f, oneMinusF; \ - FOG_FUNC(f, c); \ - f = CLAMP(f, 0.0F, 1.0F); \ - oneMinusF = 1.0F - f; \ - rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \ - rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \ - rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \ - fogCoord += fogStep; \ - w += wStep; \ - } \ -} - -/** - * Apply fog to a span of RGBA pixels. - * The fog value are either in the span->array->fog array or interpolated from - * the fog/fogStep values. - * They fog values are either fog coordinates (Z) or fog blend factors. - * _PreferPixelFog should be in sync with that state! - */ -void -_swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span ) -{ - const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx); - GLfloat rFog, gFog, bFog; - - ASSERT(swrast->_FogEnabled); - ASSERT(span->arrayMask & SPAN_RGBA); - - /* compute (scaled) fog color */ - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - rFog = ctx->Fog.Color[RCOMP] * 255.0F; - gFog = ctx->Fog.Color[GCOMP] * 255.0F; - bFog = ctx->Fog.Color[BCOMP] * 255.0F; - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - rFog = ctx->Fog.Color[RCOMP] * 65535.0F; - gFog = ctx->Fog.Color[GCOMP] * 65535.0F; - bFog = ctx->Fog.Color[BCOMP] * 65535.0F; - } - else { - rFog = ctx->Fog.Color[RCOMP]; - gFog = ctx->Fog.Color[GCOMP]; - bFog = ctx->Fog.Color[BCOMP]; - } - - if (swrast->_PreferPixelFog) { - /* The span's fog values are fog coordinates, now compute blend factors - * and blend the fragment colors with the fog color. - */ - switch (swrast->_FogMode) { - case GL_LINEAR: - { - const GLfloat fogEnd = ctx->Fog.End; - const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End) - ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start); - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - FOG_LOOP(GLubyte, LINEAR_FOG); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - FOG_LOOP(GLushort, LINEAR_FOG); - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - ASSERT(span->array->ChanType == GL_FLOAT); - FOG_LOOP(GLfloat, LINEAR_FOG); - } - } - break; - - case GL_EXP: - { - const GLfloat density = -ctx->Fog.Density; - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - FOG_LOOP(GLubyte, EXP_FOG); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - FOG_LOOP(GLushort, EXP_FOG); - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - ASSERT(span->array->ChanType == GL_FLOAT); - FOG_LOOP(GLfloat, EXP_FOG); - } - } - break; - - case GL_EXP2: - { - const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density; - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - FOG_LOOP(GLubyte, EXP2_FOG); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - FOG_LOOP(GLushort, EXP2_FOG); - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - ASSERT(span->array->ChanType == GL_FLOAT); - FOG_LOOP(GLfloat, EXP2_FOG); - } - } - break; - - default: - _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span"); - return; - } - } - else { - /* The span's fog start/step/array values are blend factors in [0,1]. - * They were previously computed per-vertex. - */ - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - FOG_LOOP(GLubyte, BLEND_FOG); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - FOG_LOOP(GLushort, BLEND_FOG); - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - ASSERT(span->array->ChanType == GL_FLOAT); - FOG_LOOP(GLfloat, BLEND_FOG); - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_fog.h"
+
+
+/**
+ * Used to convert current raster distance to a fog factor in [0,1].
+ */
+GLfloat
+_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)
+{
+ GLfloat d, f;
+
+ switch (ctx->Fog.Mode) {
+ case GL_LINEAR:
+ if (ctx->Fog.Start == ctx->Fog.End)
+ d = 1.0F;
+ else
+ d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+ f = (ctx->Fog.End - z) * d;
+ return CLAMP(f, 0.0F, 1.0F);
+ case GL_EXP:
+ d = ctx->Fog.Density;
+ f = EXPF(-d * z);
+ f = CLAMP(f, 0.0F, 1.0F);
+ return f;
+ case GL_EXP2:
+ d = ctx->Fog.Density;
+ f = EXPF(-(d * d * z * z));
+ f = CLAMP(f, 0.0F, 1.0F);
+ return f;
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");
+ return 0.0;
+ }
+}
+
+
+#define LINEAR_FOG(f, coord) f = (fogEnd - coord) * fogScale
+
+#define EXP_FOG(f, coord) f = EXPF(density * coord)
+
+#define EXP2_FOG(f, coord) \
+do { \
+ GLfloat tmp = negDensitySquared * coord * coord; \
+ if (tmp < FLT_MIN_10_EXP) \
+ tmp = FLT_MIN_10_EXP; \
+ f = EXPF(tmp); \
+ } while(0)
+
+
+#define BLEND_FOG(f, coord) f = coord
+
+
+
+/**
+ * Template code for computing fog blend factor and applying it to colors.
+ * \param TYPE either GLubyte, GLushort or GLfloat.
+ * \param COMPUTE_F code to compute the fog blend factor, f.
+ */
+#define FOG_LOOP(TYPE, FOG_FUNC) \
+if (span->arrayAttribs & FRAG_BIT_FOGC) { \
+ GLuint i; \
+ for (i = 0; i < span->end; i++) { \
+ const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0]; \
+ const GLfloat c = FABSF(fogCoord); \
+ GLfloat f, oneMinusF; \
+ FOG_FUNC(f, c); \
+ f = CLAMP(f, 0.0F, 1.0F); \
+ oneMinusF = 1.0F - f; \
+ rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
+ rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
+ rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
+ } \
+} \
+else { \
+ const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0]; \
+ GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0]; \
+ const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3]; \
+ GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; \
+ GLuint i; \
+ for (i = 0; i < span->end; i++) { \
+ const GLfloat c = FABSF(fogCoord) / w; \
+ GLfloat f, oneMinusF; \
+ FOG_FUNC(f, c); \
+ f = CLAMP(f, 0.0F, 1.0F); \
+ oneMinusF = 1.0F - f; \
+ rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
+ rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
+ rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
+ fogCoord += fogStep; \
+ w += wStep; \
+ } \
+}
+
+/**
+ * Apply fog to a span of RGBA pixels.
+ * The fog value are either in the span->array->fog array or interpolated from
+ * the fog/fogStep values.
+ * They fog values are either fog coordinates (Z) or fog blend factors.
+ * _PreferPixelFog should be in sync with that state!
+ */
+void
+_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )
+{
+ const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);
+ GLfloat rFog, gFog, bFog;
+
+ ASSERT(swrast->_FogEnabled);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ /* compute (scaled) fog color */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ rFog = ctx->Fog.Color[RCOMP] * 255.0F;
+ gFog = ctx->Fog.Color[GCOMP] * 255.0F;
+ bFog = ctx->Fog.Color[BCOMP] * 255.0F;
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ rFog = ctx->Fog.Color[RCOMP] * 65535.0F;
+ gFog = ctx->Fog.Color[GCOMP] * 65535.0F;
+ bFog = ctx->Fog.Color[BCOMP] * 65535.0F;
+ }
+ else {
+ rFog = ctx->Fog.Color[RCOMP];
+ gFog = ctx->Fog.Color[GCOMP];
+ bFog = ctx->Fog.Color[BCOMP];
+ }
+
+ if (swrast->_PreferPixelFog) {
+ /* The span's fog values are fog coordinates, now compute blend factors
+ * and blend the fragment colors with the fog color.
+ */
+ switch (swrast->_FogMode) {
+ case GL_LINEAR:
+ {
+ const GLfloat fogEnd = ctx->Fog.End;
+ const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
+ ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, LINEAR_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, LINEAR_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, LINEAR_FOG);
+ }
+ }
+ break;
+
+ case GL_EXP:
+ {
+ const GLfloat density = -ctx->Fog.Density;
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, EXP_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, EXP_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, EXP_FOG);
+ }
+ }
+ break;
+
+ case GL_EXP2:
+ {
+ const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, EXP2_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, EXP2_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, EXP2_FOG);
+ }
+ }
+ break;
+
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
+ return;
+ }
+ }
+ else {
+ /* The span's fog start/step/array values are blend factors in [0,1].
+ * They were previously computed per-vertex.
+ */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, BLEND_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, BLEND_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, BLEND_FOG);
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_fog.h b/mesalib/src/mesa/swrast/s_fog.h index a496746d1..eed9b8bdd 100644 --- a/mesalib/src/mesa/swrast/s_fog.h +++ b/mesalib/src/mesa/swrast/s_fog.h @@ -1,41 +1,42 @@ - -/* - * Mesa 3-D graphics library - * Version: 4.1 - * - * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_FOG_H -#define S_FOG_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern GLfloat -_swrast_z_to_fogfactor(GLcontext *ctx, GLfloat z); - -extern void -_swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span ); - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_FOG_H
+#define S_FOG_H
+
+
+#include "main/glheader.h"
+#include "s_span.h"
+
+struct gl_context;
+
+extern GLfloat
+_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z);
+
+extern void
+_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span );
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_fragprog.c b/mesalib/src/mesa/swrast/s_fragprog.c index 9facb44d9..2608d5373 100644 --- a/mesalib/src/mesa/swrast/s_fragprog.c +++ b/mesalib/src/mesa/swrast/s_fragprog.c @@ -1,277 +1,277 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.h" -#include "main/colormac.h" -#include "program/prog_instruction.h" - -#include "s_context.h" -#include "s_fragprog.h" -#include "s_span.h" - - -/** - * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel' - * and return results in 'colorOut'. - */ -static INLINE void -swizzle_texel(const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle) -{ - if (swizzle == SWIZZLE_NOOP) { - COPY_4V(colorOut, texel); - } - else { - GLfloat vector[6]; - vector[SWIZZLE_X] = texel[0]; - vector[SWIZZLE_Y] = texel[1]; - vector[SWIZZLE_Z] = texel[2]; - vector[SWIZZLE_W] = texel[3]; - vector[SWIZZLE_ZERO] = 0.0F; - vector[SWIZZLE_ONE] = 1.0F; - colorOut[0] = vector[GET_SWZ(swizzle, 0)]; - colorOut[1] = vector[GET_SWZ(swizzle, 1)]; - colorOut[2] = vector[GET_SWZ(swizzle, 2)]; - colorOut[3] = vector[GET_SWZ(swizzle, 3)]; - } -} - - -/** - * Fetch a texel with given lod. - * Called via machine->FetchTexelLod() - */ -static void -fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, - GLuint unit, GLfloat color[4] ) -{ - const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; - - if (texObj) { - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLfloat rgba[4]; - - lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); - - swrast->TextureSample[unit](ctx, texObj, 1, - (const GLfloat (*)[4]) texcoord, - &lambda, &rgba); - swizzle_texel(rgba, color, texObj->_Swizzle); - } - else { - ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F); - } -} - - -/** - * Fetch a texel with the given partial derivatives to compute a level - * of detail in the mipmap. - * Called via machine->FetchTexelDeriv() - * \param lodBias the lod bias which may be specified by a TXB instruction, - * otherwise zero. - */ -static void -fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], - const GLfloat texdx[4], const GLfloat texdy[4], - GLfloat lodBias, GLuint unit, GLfloat color[4] ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - const struct gl_texture_object *texObj = texUnit->_Current; - - if (texObj) { - const struct gl_texture_image *texImg = - texObj->Image[0][texObj->BaseLevel]; - const GLfloat texW = (GLfloat) texImg->WidthScale; - const GLfloat texH = (GLfloat) texImg->HeightScale; - GLfloat lambda; - GLfloat rgba[4]; - - lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ - texdx[1], texdy[1], /* dt/dx, dt/dy */ - texdx[3], texdy[3], /* dq/dx, dq/dy */ - texW, texH, - texcoord[0], texcoord[1], texcoord[3], - 1.0F / texcoord[3]); - - lambda += lodBias + texUnit->LodBias + texObj->LodBias; - - lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); - - swrast->TextureSample[unit](ctx, texObj, 1, - (const GLfloat (*)[4]) texcoord, - &lambda, &rgba); - swizzle_texel(rgba, color, texObj->_Swizzle); - } - else { - ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F); - } -} - - -/** - * Initialize the virtual fragment program machine state prior to running - * fragment program on a fragment. This involves initializing the input - * registers, condition codes, etc. - * \param machine the virtual machine state to init - * \param program the fragment program we're about to run - * \param span the span of pixels we'll operate on - * \param col which element (column) of the span we'll operate on - */ -static void -init_machine(GLcontext *ctx, struct gl_program_machine *machine, - const struct gl_fragment_program *program, - const SWspan *span, GLuint col) -{ - GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col]; - - if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { - /* Clear temporary registers (undefined for ARB_f_p) */ - memset(machine->Temporaries, 0, MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); - } - - /* ARB_fragment_coord_conventions */ - if (program->OriginUpperLeft) - wpos[1] = ctx->DrawBuffer->Height - 1 - wpos[1]; - if (!program->PixelCenterInteger) { - wpos[0] += 0.5F; - wpos[1] += 0.5F; - } - - /* Setup pointer to input attributes */ - machine->Attribs = span->array->attribs; - - machine->DerivX = (GLfloat (*)[4]) span->attrStepX; - machine->DerivY = (GLfloat (*)[4]) span->attrStepY; - machine->NumDeriv = FRAG_ATTRIB_MAX; - - machine->Samplers = program->Base.SamplerUnits; - - /* if running a GLSL program (not ARB_fragment_program) */ - if (ctx->Shader.CurrentProgram) { - /* Store front/back facing value */ - machine->Attribs[FRAG_ATTRIB_FACE][col][0] = 1.0F - span->facing; - } - - machine->CurElement = col; - - /* init condition codes */ - machine->CondCodes[0] = COND_EQ; - machine->CondCodes[1] = COND_EQ; - machine->CondCodes[2] = COND_EQ; - machine->CondCodes[3] = COND_EQ; - - /* init call stack */ - machine->StackDepth = 0; - - machine->FetchTexelLod = fetch_texel_lod; - machine->FetchTexelDeriv = fetch_texel_deriv; -} - - -/** - * Run fragment program on the pixels in span from 'start' to 'end' - 1. - */ -static void -run_program(GLcontext *ctx, SWspan *span, GLuint start, GLuint end) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const struct gl_fragment_program *program = ctx->FragmentProgram._Current; - const GLbitfield64 outputsWritten = program->Base.OutputsWritten; - struct gl_program_machine *machine = &swrast->FragProgMachine; - GLuint i; - - for (i = start; i < end; i++) { - if (span->array->mask[i]) { - init_machine(ctx, machine, program, span, i); - - if (_mesa_execute_program(ctx, &program->Base, machine)) { - - /* Store result color */ - if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) { - COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], - machine->Outputs[FRAG_RESULT_COLOR]); - } - else { - /* Multiple drawbuffers / render targets - * Note that colors beyond 0 and 1 will overwrite other - * attributes, such as FOGC, TEX0, TEX1, etc. That's OK. - */ - GLuint buf; - for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) { - if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DATA0 + buf)) { - COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i], - machine->Outputs[FRAG_RESULT_DATA0 + buf]); - } - } - } - - /* Store result depth/z */ - if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) { - const GLfloat depth = machine->Outputs[FRAG_RESULT_DEPTH][2]; - if (depth <= 0.0) - span->array->z[i] = 0; - else if (depth >= 1.0) - span->array->z[i] = ctx->DrawBuffer->_DepthMax; - else - span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF); - } - } - else { - /* killed fragment */ - span->array->mask[i] = GL_FALSE; - span->writeAll = GL_FALSE; - } - } - } -} - - -/** - * Execute the current fragment program for all the fragments - * in the given span. - */ -void -_swrast_exec_fragment_program( GLcontext *ctx, SWspan *span ) -{ - const struct gl_fragment_program *program = ctx->FragmentProgram._Current; - - /* incoming colors should be floats */ - if (program->Base.InputsRead & FRAG_BIT_COL0) { - ASSERT(span->array->ChanType == GL_FLOAT); - } - - run_program(ctx, span, 0, span->end); - - if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) { - span->interpMask &= ~SPAN_RGBA; - span->arrayMask |= SPAN_RGBA; - } - - if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) { - span->interpMask &= ~SPAN_Z; - span->arrayMask |= SPAN_Z; - } -} - +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "program/prog_instruction.h"
+
+#include "s_context.h"
+#include "s_fragprog.h"
+#include "s_span.h"
+
+
+/**
+ * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel'
+ * and return results in 'colorOut'.
+ */
+static INLINE void
+swizzle_texel(const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle)
+{
+ if (swizzle == SWIZZLE_NOOP) {
+ COPY_4V(colorOut, texel);
+ }
+ else {
+ GLfloat vector[6];
+ vector[SWIZZLE_X] = texel[0];
+ vector[SWIZZLE_Y] = texel[1];
+ vector[SWIZZLE_Z] = texel[2];
+ vector[SWIZZLE_W] = texel[3];
+ vector[SWIZZLE_ZERO] = 0.0F;
+ vector[SWIZZLE_ONE] = 1.0F;
+ colorOut[0] = vector[GET_SWZ(swizzle, 0)];
+ colorOut[1] = vector[GET_SWZ(swizzle, 1)];
+ colorOut[2] = vector[GET_SWZ(swizzle, 2)];
+ colorOut[3] = vector[GET_SWZ(swizzle, 3)];
+ }
+}
+
+
+/**
+ * Fetch a texel with given lod.
+ * Called via machine->FetchTexelLod()
+ */
+static void
+fetch_texel_lod( struct gl_context *ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4] )
+{
+ const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+
+ if (texObj) {
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat rgba[4];
+
+ lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
+
+ swrast->TextureSample[unit](ctx, texObj, 1,
+ (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ swizzle_texel(rgba, color, texObj->_Swizzle);
+ }
+ else {
+ ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+}
+
+
+/**
+ * Fetch a texel with the given partial derivatives to compute a level
+ * of detail in the mipmap.
+ * Called via machine->FetchTexelDeriv()
+ * \param lodBias the lod bias which may be specified by a TXB instruction,
+ * otherwise zero.
+ */
+static void
+fetch_texel_deriv( struct gl_context *ctx, const GLfloat texcoord[4],
+ const GLfloat texdx[4], const GLfloat texdy[4],
+ GLfloat lodBias, GLuint unit, GLfloat color[4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ const struct gl_texture_object *texObj = texUnit->_Current;
+
+ if (texObj) {
+ const struct gl_texture_image *texImg =
+ texObj->Image[0][texObj->BaseLevel];
+ const GLfloat texW = (GLfloat) texImg->WidthScale;
+ const GLfloat texH = (GLfloat) texImg->HeightScale;
+ GLfloat lambda;
+ GLfloat rgba[4];
+
+ lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
+ texdx[1], texdy[1], /* dt/dx, dt/dy */
+ texdx[3], texdy[3], /* dq/dx, dq/dy */
+ texW, texH,
+ texcoord[0], texcoord[1], texcoord[3],
+ 1.0F / texcoord[3]);
+
+ lambda += lodBias + texUnit->LodBias + texObj->LodBias;
+
+ lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
+
+ swrast->TextureSample[unit](ctx, texObj, 1,
+ (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ swizzle_texel(rgba, color, texObj->_Swizzle);
+ }
+ else {
+ ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+}
+
+
+/**
+ * Initialize the virtual fragment program machine state prior to running
+ * fragment program on a fragment. This involves initializing the input
+ * registers, condition codes, etc.
+ * \param machine the virtual machine state to init
+ * \param program the fragment program we're about to run
+ * \param span the span of pixels we'll operate on
+ * \param col which element (column) of the span we'll operate on
+ */
+static void
+init_machine(struct gl_context *ctx, struct gl_program_machine *machine,
+ const struct gl_fragment_program *program,
+ const SWspan *span, GLuint col)
+{
+ GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col];
+
+ if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
+ /* Clear temporary registers (undefined for ARB_f_p) */
+ memset(machine->Temporaries, 0, MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
+ }
+
+ /* ARB_fragment_coord_conventions */
+ if (program->OriginUpperLeft)
+ wpos[1] = ctx->DrawBuffer->Height - 1 - wpos[1];
+ if (!program->PixelCenterInteger) {
+ wpos[0] += 0.5F;
+ wpos[1] += 0.5F;
+ }
+
+ /* Setup pointer to input attributes */
+ machine->Attribs = span->array->attribs;
+
+ machine->DerivX = (GLfloat (*)[4]) span->attrStepX;
+ machine->DerivY = (GLfloat (*)[4]) span->attrStepY;
+ machine->NumDeriv = FRAG_ATTRIB_MAX;
+
+ machine->Samplers = program->Base.SamplerUnits;
+
+ /* if running a GLSL program (not ARB_fragment_program) */
+ if (ctx->Shader.CurrentFragmentProgram) {
+ /* Store front/back facing value */
+ machine->Attribs[FRAG_ATTRIB_FACE][col][0] = 1.0F - span->facing;
+ }
+
+ machine->CurElement = col;
+
+ /* init condition codes */
+ machine->CondCodes[0] = COND_EQ;
+ machine->CondCodes[1] = COND_EQ;
+ machine->CondCodes[2] = COND_EQ;
+ machine->CondCodes[3] = COND_EQ;
+
+ /* init call stack */
+ machine->StackDepth = 0;
+
+ machine->FetchTexelLod = fetch_texel_lod;
+ machine->FetchTexelDeriv = fetch_texel_deriv;
+}
+
+
+/**
+ * Run fragment program on the pixels in span from 'start' to 'end' - 1.
+ */
+static void
+run_program(struct gl_context *ctx, SWspan *span, GLuint start, GLuint end)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
+ const GLbitfield64 outputsWritten = program->Base.OutputsWritten;
+ struct gl_program_machine *machine = &swrast->FragProgMachine;
+ GLuint i;
+
+ for (i = start; i < end; i++) {
+ if (span->array->mask[i]) {
+ init_machine(ctx, machine, program, span, i);
+
+ if (_mesa_execute_program(ctx, &program->Base, machine)) {
+
+ /* Store result color */
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
+ COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i],
+ machine->Outputs[FRAG_RESULT_COLOR]);
+ }
+ else {
+ /* Multiple drawbuffers / render targets
+ * Note that colors beyond 0 and 1 will overwrite other
+ * attributes, such as FOGC, TEX0, TEX1, etc. That's OK.
+ */
+ GLuint buf;
+ for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DATA0 + buf)) {
+ COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i],
+ machine->Outputs[FRAG_RESULT_DATA0 + buf]);
+ }
+ }
+ }
+
+ /* Store result depth/z */
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
+ const GLfloat depth = machine->Outputs[FRAG_RESULT_DEPTH][2];
+ if (depth <= 0.0)
+ span->array->z[i] = 0;
+ else if (depth >= 1.0)
+ span->array->z[i] = ctx->DrawBuffer->_DepthMax;
+ else
+ span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
+ }
+ }
+ else {
+ /* killed fragment */
+ span->array->mask[i] = GL_FALSE;
+ span->writeAll = GL_FALSE;
+ }
+ }
+ }
+}
+
+
+/**
+ * Execute the current fragment program for all the fragments
+ * in the given span.
+ */
+void
+_swrast_exec_fragment_program( struct gl_context *ctx, SWspan *span )
+{
+ const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
+
+ /* incoming colors should be floats */
+ if (program->Base.InputsRead & FRAG_BIT_COL0) {
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ }
+
+ run_program(ctx, span, 0, span->end);
+
+ if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
+ span->interpMask &= ~SPAN_RGBA;
+ span->arrayMask |= SPAN_RGBA;
+ }
+
+ if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
+ span->interpMask &= ~SPAN_Z;
+ span->arrayMask |= SPAN_Z;
+ }
+}
+
diff --git a/mesalib/src/mesa/swrast/s_fragprog.h b/mesalib/src/mesa/swrast/s_fragprog.h index 92b9d01e1..bd5fe6877 100644 --- a/mesalib/src/mesa/swrast/s_fragprog.h +++ b/mesalib/src/mesa/swrast/s_fragprog.h @@ -1,39 +1,40 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.3 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_FRAGPROG_H -#define S_FRAGPROG_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern void -_swrast_exec_fragment_program(GLcontext *ctx, SWspan *span); - - -#endif /* S_FRAGPROG_H */ - +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.3
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_FRAGPROG_H
+#define S_FRAGPROG_H
+
+
+#include "s_span.h"
+
+struct gl_context;
+
+
+extern void
+_swrast_exec_fragment_program(struct gl_context *ctx, SWspan *span);
+
+
+#endif /* S_FRAGPROG_H */
+
diff --git a/mesalib/src/mesa/swrast/s_lines.c b/mesalib/src/mesa/swrast/s_lines.c index 7db5af4ae..aba403308 100644 --- a/mesalib/src/mesa/swrast/s_lines.c +++ b/mesalib/src/mesa/swrast/s_lines.c @@ -1,268 +1,268 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/macros.h" -#include "s_aaline.h" -#include "s_context.h" -#include "s_feedback.h" -#include "s_lines.h" -#include "s_span.h" - - -/* - * Init the mask[] array to implement a line stipple. - */ -static void -compute_stipple_mask( GLcontext *ctx, GLuint len, GLubyte mask[] ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLuint i; - - for (i = 0; i < len; i++) { - GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf; - if ((1 << bit) & ctx->Line.StipplePattern) { - mask[i] = GL_TRUE; - } - else { - mask[i] = GL_FALSE; - } - swrast->StippleCounter++; - } -} - - -/* - * To draw a wide line we can simply redraw the span N times, side by side. - */ -static void -draw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor ) -{ - const GLint width = (GLint) CLAMP(ctx->Line.Width, - ctx->Const.MinLineWidth, - ctx->Const.MaxLineWidth); - GLint start; - - ASSERT(span->end < MAX_WIDTH); - - if (width & 1) - start = width / 2; - else - start = width / 2 - 1; - - if (xMajor) { - GLint *y = span->array->y; - GLuint i; - GLint w; - for (w = 0; w < width; w++) { - if (w == 0) { - for (i = 0; i < span->end; i++) - y[i] -= start; - } - else { - for (i = 0; i < span->end; i++) - y[i]++; - } - _swrast_write_rgba_span(ctx, span); - } - } - else { - GLint *x = span->array->x; - GLuint i; - GLint w; - for (w = 0; w < width; w++) { - if (w == 0) { - for (i = 0; i < span->end; i++) - x[i] -= start; - } - else { - for (i = 0; i < span->end; i++) - x[i]++; - } - _swrast_write_rgba_span(ctx, span); - } - } -} - - - -/**********************************************************************/ -/***** Rasterization *****/ -/**********************************************************************/ - -/* Simple RGBA index line (no stipple, width=1, no Z, no fog, no tex)*/ -#define NAME simple_no_z_rgba_line -#define INTERP_RGBA -#define RENDER_SPAN(span) _swrast_write_rgba_span(ctx, &span); -#include "s_linetemp.h" - - -/* Z, fog, wide, stipple RGBA line */ -#define NAME rgba_line -#define INTERP_RGBA -#define INTERP_Z -#define RENDER_SPAN(span) \ - if (ctx->Line.StippleFlag) { \ - span.arrayMask |= SPAN_MASK; \ - compute_stipple_mask(ctx, span.end, span.array->mask); \ - } \ - if (ctx->Line.Width > 1.0) { \ - draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \ - } \ - else { \ - _swrast_write_rgba_span(ctx, &span); \ - } -#include "s_linetemp.h" - - -/* General-purpose line (any/all features). */ -#define NAME general_line -#define INTERP_RGBA -#define INTERP_Z -#define INTERP_ATTRIBS -#define RENDER_SPAN(span) \ - if (ctx->Line.StippleFlag) { \ - span.arrayMask |= SPAN_MASK; \ - compute_stipple_mask(ctx, span.end, span.array->mask); \ - } \ - if (ctx->Line.Width > 1.0) { \ - draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \ - } \ - else { \ - _swrast_write_rgba_span(ctx, &span); \ - } -#include "s_linetemp.h" - - - -void -_swrast_add_spec_terms_line(GLcontext *ctx, - const SWvertex *v0, const SWvertex *v1) -{ - SWvertex *ncv0 = (SWvertex *)v0; - SWvertex *ncv1 = (SWvertex *)v1; - GLfloat rSum, gSum, bSum; - GLchan cSave[2][4]; - - /* save original colors */ - COPY_CHAN4(cSave[0], ncv0->color); - COPY_CHAN4(cSave[1], ncv1->color); - /* sum v0 */ - rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum); - /* sum v1 */ - rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum); - /* draw */ - SWRAST_CONTEXT(ctx)->SpecLine( ctx, ncv0, ncv1 ); - /* restore original colors */ - COPY_CHAN4( ncv0->attrib[FRAG_ATTRIB_COL0], cSave[0] ); - COPY_CHAN4( ncv1->attrib[FRAG_ATTRIB_COL0], cSave[1] ); -} - - - -#ifdef DEBUG - -/* record the current line function name */ -static const char *lineFuncName = NULL; - -#define USE(lineFunc) \ -do { \ - lineFuncName = #lineFunc; \ - /*printf("%s\n", lineFuncName);*/ \ - swrast->Line = lineFunc; \ -} while (0) - -#else - -#define USE(lineFunc) swrast->Line = lineFunc - -#endif - - - -/** - * Determine which line drawing function to use given the current - * rendering context. - * - * Please update the summary flag _SWRAST_NEW_LINE if you add or remove - * tests to this code. - */ -void -_swrast_choose_line( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLboolean specular = (ctx->Fog.ColorSumEnabled || - (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)); - - if (ctx->RenderMode == GL_RENDER) { - if (ctx->Line.SmoothFlag) { - /* antialiased lines */ - _swrast_choose_aa_line_function(ctx); - ASSERT(swrast->Line); - } - else if (ctx->Texture._EnabledCoordUnits - || ctx->FragmentProgram._Current - || swrast->_FogEnabled - || specular) { - USE(general_line); - } - else if (ctx->Depth.Test - || ctx->Line.Width != 1.0 - || ctx->Line.StippleFlag) { - /* no texture, but Z, fog, width>1, stipple, etc. */ -#if CHAN_BITS == 32 - USE(general_line); -#else - USE(rgba_line); -#endif - } - else { - ASSERT(!ctx->Depth.Test); - ASSERT(ctx->Line.Width == 1.0); - /* simple lines */ - USE(simple_no_z_rgba_line); - } - } - else if (ctx->RenderMode == GL_FEEDBACK) { - USE(_swrast_feedback_line); - } - else { - ASSERT(ctx->RenderMode == GL_SELECT); - USE(_swrast_select_line); - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "s_aaline.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_lines.h"
+#include "s_span.h"
+
+
+/*
+ * Init the mask[] array to implement a line stipple.
+ */
+static void
+compute_stipple_mask( struct gl_context *ctx, GLuint len, GLubyte mask[] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+
+ for (i = 0; i < len; i++) {
+ GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf;
+ if ((1 << bit) & ctx->Line.StipplePattern) {
+ mask[i] = GL_TRUE;
+ }
+ else {
+ mask[i] = GL_FALSE;
+ }
+ swrast->StippleCounter++;
+ }
+}
+
+
+/*
+ * To draw a wide line we can simply redraw the span N times, side by side.
+ */
+static void
+draw_wide_line( struct gl_context *ctx, SWspan *span, GLboolean xMajor )
+{
+ const GLint width = (GLint) CLAMP(ctx->Line.Width,
+ ctx->Const.MinLineWidth,
+ ctx->Const.MaxLineWidth);
+ GLint start;
+
+ ASSERT(span->end < MAX_WIDTH);
+
+ if (width & 1)
+ start = width / 2;
+ else
+ start = width / 2 - 1;
+
+ if (xMajor) {
+ GLint *y = span->array->y;
+ GLuint i;
+ GLint w;
+ for (w = 0; w < width; w++) {
+ if (w == 0) {
+ for (i = 0; i < span->end; i++)
+ y[i] -= start;
+ }
+ else {
+ for (i = 0; i < span->end; i++)
+ y[i]++;
+ }
+ _swrast_write_rgba_span(ctx, span);
+ }
+ }
+ else {
+ GLint *x = span->array->x;
+ GLuint i;
+ GLint w;
+ for (w = 0; w < width; w++) {
+ if (w == 0) {
+ for (i = 0; i < span->end; i++)
+ x[i] -= start;
+ }
+ else {
+ for (i = 0; i < span->end; i++)
+ x[i]++;
+ }
+ _swrast_write_rgba_span(ctx, span);
+ }
+ }
+}
+
+
+
+/**********************************************************************/
+/***** Rasterization *****/
+/**********************************************************************/
+
+/* Simple RGBA index line (no stipple, width=1, no Z, no fog, no tex)*/
+#define NAME simple_no_z_rgba_line
+#define INTERP_RGBA
+#define RENDER_SPAN(span) _swrast_write_rgba_span(ctx, &span);
+#include "s_linetemp.h"
+
+
+/* Z, fog, wide, stipple RGBA line */
+#define NAME rgba_line
+#define INTERP_RGBA
+#define INTERP_Z
+#define RENDER_SPAN(span) \
+ if (ctx->Line.StippleFlag) { \
+ span.arrayMask |= SPAN_MASK; \
+ compute_stipple_mask(ctx, span.end, span.array->mask); \
+ } \
+ if (ctx->Line.Width > 1.0) { \
+ draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \
+ } \
+ else { \
+ _swrast_write_rgba_span(ctx, &span); \
+ }
+#include "s_linetemp.h"
+
+
+/* General-purpose line (any/all features). */
+#define NAME general_line
+#define INTERP_RGBA
+#define INTERP_Z
+#define INTERP_ATTRIBS
+#define RENDER_SPAN(span) \
+ if (ctx->Line.StippleFlag) { \
+ span.arrayMask |= SPAN_MASK; \
+ compute_stipple_mask(ctx, span.end, span.array->mask); \
+ } \
+ if (ctx->Line.Width > 1.0) { \
+ draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \
+ } \
+ else { \
+ _swrast_write_rgba_span(ctx, &span); \
+ }
+#include "s_linetemp.h"
+
+
+
+void
+_swrast_add_spec_terms_line(struct gl_context *ctx,
+ const SWvertex *v0, const SWvertex *v1)
+{
+ SWvertex *ncv0 = (SWvertex *)v0;
+ SWvertex *ncv1 = (SWvertex *)v1;
+ GLfloat rSum, gSum, bSum;
+ GLchan cSave[2][4];
+
+ /* save original colors */
+ COPY_CHAN4(cSave[0], ncv0->color);
+ COPY_CHAN4(cSave[1], ncv1->color);
+ /* sum v0 */
+ rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
+ /* sum v1 */
+ rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
+ /* draw */
+ SWRAST_CONTEXT(ctx)->SpecLine( ctx, ncv0, ncv1 );
+ /* restore original colors */
+ COPY_CHAN4( ncv0->attrib[FRAG_ATTRIB_COL0], cSave[0] );
+ COPY_CHAN4( ncv1->attrib[FRAG_ATTRIB_COL0], cSave[1] );
+}
+
+
+
+#ifdef DEBUG
+
+/* record the current line function name */
+static const char *lineFuncName = NULL;
+
+#define USE(lineFunc) \
+do { \
+ lineFuncName = #lineFunc; \
+ /*printf("%s\n", lineFuncName);*/ \
+ swrast->Line = lineFunc; \
+} while (0)
+
+#else
+
+#define USE(lineFunc) swrast->Line = lineFunc
+
+#endif
+
+
+
+/**
+ * Determine which line drawing function to use given the current
+ * rendering context.
+ *
+ * Please update the summary flag _SWRAST_NEW_LINE if you add or remove
+ * tests to this code.
+ */
+void
+_swrast_choose_line( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean specular = (ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR));
+
+ if (ctx->RenderMode == GL_RENDER) {
+ if (ctx->Line.SmoothFlag) {
+ /* antialiased lines */
+ _swrast_choose_aa_line_function(ctx);
+ ASSERT(swrast->Line);
+ }
+ else if (ctx->Texture._EnabledCoordUnits
+ || ctx->FragmentProgram._Current
+ || swrast->_FogEnabled
+ || specular) {
+ USE(general_line);
+ }
+ else if (ctx->Depth.Test
+ || ctx->Line.Width != 1.0
+ || ctx->Line.StippleFlag) {
+ /* no texture, but Z, fog, width>1, stipple, etc. */
+#if CHAN_BITS == 32
+ USE(general_line);
+#else
+ USE(rgba_line);
+#endif
+ }
+ else {
+ ASSERT(!ctx->Depth.Test);
+ ASSERT(ctx->Line.Width == 1.0);
+ /* simple lines */
+ USE(simple_no_z_rgba_line);
+ }
+ }
+ else if (ctx->RenderMode == GL_FEEDBACK) {
+ USE(_swrast_feedback_line);
+ }
+ else {
+ ASSERT(ctx->RenderMode == GL_SELECT);
+ USE(_swrast_select_line);
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_lines.h b/mesalib/src/mesa/swrast/s_lines.h index 22979a02b..0f95eecab 100644 --- a/mesalib/src/mesa/swrast/s_lines.h +++ b/mesalib/src/mesa/swrast/s_lines.h @@ -1,41 +1,41 @@ - -/* - * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_LINES_H -#define S_LINES_H - -#include "swrast.h" - -void -_swrast_choose_line( GLcontext *ctx ); - -void -_swrast_add_spec_terms_line( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1 ); - - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_LINES_H
+#define S_LINES_H
+
+#include "swrast.h"
+
+void
+_swrast_choose_line( struct gl_context *ctx );
+
+void
+_swrast_add_spec_terms_line( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1 );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_linetemp.h b/mesalib/src/mesa/swrast/s_linetemp.h index 033431df2..bd94ca40a 100644 --- a/mesalib/src/mesa/swrast/s_linetemp.h +++ b/mesalib/src/mesa/swrast/s_linetemp.h @@ -1,402 +1,402 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Line Rasterizer Template - * - * This file is #include'd to generate custom line rasterizers. - * - * The following macros may be defined to indicate what auxillary information - * must be interplated along the line: - * INTERP_Z - if defined, interpolate Z values - * INTERP_ATTRIBS - if defined, interpolate attribs (texcoords, varying, etc) - * - * When one can directly address pixels in the color buffer the following - * macros can be defined and used to directly compute pixel addresses during - * rasterization (see pixelPtr): - * PIXEL_TYPE - the datatype of a pixel (GLubyte, GLushort, GLuint) - * BYTES_PER_ROW - number of bytes per row in the color buffer - * PIXEL_ADDRESS(X,Y) - returns the address of pixel at (X,Y) where - * Y==0 at bottom of screen and increases upward. - * - * Similarly, for direct depth buffer access, this type is used for depth - * buffer addressing: - * DEPTH_TYPE - either GLushort or GLuint - * - * Optionally, one may provide one-time setup code - * SETUP_CODE - code which is to be executed once per line - * - * To actually "plot" each pixel the PLOT macro must be defined... - * PLOT(X,Y) - code to plot a pixel. Example: - * if (Z < *zPtr) { - * *zPtr = Z; - * color = pack_rgb( FixedToInt(r0), FixedToInt(g0), - * FixedToInt(b0) ); - * put_pixel( X, Y, color ); - * } - * - * This code was designed for the origin to be in the lower-left corner. - * - */ - - -static void -NAME( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 ) -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan span; - GLuint interpFlags = 0; - GLint x0 = (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][0]; - GLint x1 = (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][0]; - GLint y0 = (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][1]; - GLint y1 = (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][1]; - GLint dx, dy; - GLint numPixels; - GLint xstep, ystep; -#if defined(DEPTH_TYPE) - const GLint depthBits = ctx->DrawBuffer->Visual.depthBits; - const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0; - struct gl_renderbuffer *zrb = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; -#define FixedToDepth(F) ((F) >> fixedToDepthShift) - GLint zPtrXstep, zPtrYstep; - DEPTH_TYPE *zPtr; -#elif defined(INTERP_Z) - const GLint depthBits = ctx->DrawBuffer->Visual.depthBits; -#endif -#ifdef PIXEL_ADDRESS - PIXEL_TYPE *pixelPtr; - GLint pixelXstep, pixelYstep; -#endif - -#ifdef SETUP_CODE - SETUP_CODE -#endif - - (void) swrast; - - /* Cull primitives with malformed coordinates. - */ - { - GLfloat tmp = vert0->attrib[FRAG_ATTRIB_WPOS][0] + vert0->attrib[FRAG_ATTRIB_WPOS][1] - + vert1->attrib[FRAG_ATTRIB_WPOS][0] + vert1->attrib[FRAG_ATTRIB_WPOS][1]; - if (IS_INF_OR_NAN(tmp)) - return; - } - - /* - printf("%s():\n", __FUNCTION__); - printf(" (%f, %f, %f) -> (%f, %f, %f)\n", - vert0->attrib[FRAG_ATTRIB_WPOS][0], - vert0->attrib[FRAG_ATTRIB_WPOS][1], - vert0->attrib[FRAG_ATTRIB_WPOS][2], - vert1->attrib[FRAG_ATTRIB_WPOS][0], - vert1->attrib[FRAG_ATTRIB_WPOS][1], - vert1->attrib[FRAG_ATTRIB_WPOS][2]); - printf(" (%d, %d, %d) -> (%d, %d, %d)\n", - vert0->color[0], vert0->color[1], vert0->color[2], - vert1->color[0], vert1->color[1], vert1->color[2]); - printf(" (%d, %d, %d) -> (%d, %d, %d)\n", - vert0->specular[0], vert0->specular[1], vert0->specular[2], - vert1->specular[0], vert1->specular[1], vert1->specular[2]); - */ - -/* - * Despite being clipped to the view volume, the line's window coordinates - * may just lie outside the window bounds. That is, if the legal window - * coordinates are [0,W-1][0,H-1], it's possible for x==W and/or y==H. - * This quick and dirty code nudges the endpoints inside the window if - * necessary. - */ -#ifdef CLIP_HACK - { - GLint w = ctx->DrawBuffer->Width; - GLint h = ctx->DrawBuffer->Height; - if ((x0==w) | (x1==w)) { - if ((x0==w) & (x1==w)) - return; - x0 -= x0==w; - x1 -= x1==w; - } - if ((y0==h) | (y1==h)) { - if ((y0==h) & (y1==h)) - return; - y0 -= y0==h; - y1 -= y1==h; - } - } -#endif - - dx = x1 - x0; - dy = y1 - y0; - if (dx == 0 && dy == 0) - return; - - /* - printf("%s %d,%d %g %g %g %g %g %g %g %g\n", __FUNCTION__, dx, dy, - vert0->attrib[FRAG_ATTRIB_COL1][0], - vert0->attrib[FRAG_ATTRIB_COL1][1], - vert0->attrib[FRAG_ATTRIB_COL1][2], - vert0->attrib[FRAG_ATTRIB_COL1][3], - vert1->attrib[FRAG_ATTRIB_COL1][0], - vert1->attrib[FRAG_ATTRIB_COL1][1], - vert1->attrib[FRAG_ATTRIB_COL1][2], - vert1->attrib[FRAG_ATTRIB_COL1][3]); - */ - -#ifdef DEPTH_TYPE - zPtr = (DEPTH_TYPE *) zrb->GetPointer(ctx, zrb, x0, y0); -#endif -#ifdef PIXEL_ADDRESS - pixelPtr = (PIXEL_TYPE *) PIXEL_ADDRESS(x0,y0); -#endif - - if (dx<0) { - dx = -dx; /* make positive */ - xstep = -1; -#ifdef DEPTH_TYPE - zPtrXstep = -((GLint)sizeof(DEPTH_TYPE)); -#endif -#ifdef PIXEL_ADDRESS - pixelXstep = -((GLint)sizeof(PIXEL_TYPE)); -#endif - } - else { - xstep = 1; -#ifdef DEPTH_TYPE - zPtrXstep = ((GLint)sizeof(DEPTH_TYPE)); -#endif -#ifdef PIXEL_ADDRESS - pixelXstep = ((GLint)sizeof(PIXEL_TYPE)); -#endif - } - - if (dy<0) { - dy = -dy; /* make positive */ - ystep = -1; -#ifdef DEPTH_TYPE - zPtrYstep = -((GLint) (ctx->DrawBuffer->Width * sizeof(DEPTH_TYPE))); -#endif -#ifdef PIXEL_ADDRESS - pixelYstep = BYTES_PER_ROW; -#endif - } - else { - ystep = 1; -#ifdef DEPTH_TYPE - zPtrYstep = (GLint) (ctx->DrawBuffer->Width * sizeof(DEPTH_TYPE)); -#endif -#ifdef PIXEL_ADDRESS - pixelYstep = -(BYTES_PER_ROW); -#endif - } - - ASSERT(dx >= 0); - ASSERT(dy >= 0); - - numPixels = MAX2(dx, dy); - - /* - * Span setup: compute start and step values for all interpolated values. - */ - interpFlags |= SPAN_RGBA; - if (ctx->Light.ShadeModel == GL_SMOOTH) { - span.red = ChanToFixed(vert0->color[0]); - span.green = ChanToFixed(vert0->color[1]); - span.blue = ChanToFixed(vert0->color[2]); - span.alpha = ChanToFixed(vert0->color[3]); - span.redStep = (ChanToFixed(vert1->color[0]) - span.red ) / numPixels; - span.greenStep = (ChanToFixed(vert1->color[1]) - span.green) / numPixels; - span.blueStep = (ChanToFixed(vert1->color[2]) - span.blue ) / numPixels; - span.alphaStep = (ChanToFixed(vert1->color[3]) - span.alpha) / numPixels; - } - else { - span.red = ChanToFixed(vert1->color[0]); - span.green = ChanToFixed(vert1->color[1]); - span.blue = ChanToFixed(vert1->color[2]); - span.alpha = ChanToFixed(vert1->color[3]); - span.redStep = 0; - span.greenStep = 0; - span.blueStep = 0; - span.alphaStep = 0; - } -#if defined(INTERP_Z) || defined(DEPTH_TYPE) - interpFlags |= SPAN_Z; - { - if (depthBits <= 16) { - span.z = FloatToFixed(vert0->attrib[FRAG_ATTRIB_WPOS][2]) + FIXED_HALF; - span.zStep = FloatToFixed( vert1->attrib[FRAG_ATTRIB_WPOS][2] - - vert0->attrib[FRAG_ATTRIB_WPOS][2]) / numPixels; - } - else { - /* don't use fixed point */ - span.z = (GLuint) vert0->attrib[FRAG_ATTRIB_WPOS][2]; - span.zStep = (GLint) (( vert1->attrib[FRAG_ATTRIB_WPOS][2] - - vert0->attrib[FRAG_ATTRIB_WPOS][2]) / numPixels); - } - } -#endif -#if defined(INTERP_ATTRIBS) - { - const GLfloat invLen = 1.0F / numPixels; - const GLfloat invw0 = vert0->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat invw1 = vert1->attrib[FRAG_ATTRIB_WPOS][3]; - - span.attrStart[FRAG_ATTRIB_WPOS][3] = invw0; - span.attrStepX[FRAG_ATTRIB_WPOS][3] = (invw1 - invw0) * invLen; - span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0; - - ATTRIB_LOOP_BEGIN - if (swrast->_InterpMode[attr] == GL_FLAT) { - COPY_4V(span.attrStart[attr], vert1->attrib[attr]); - ASSIGN_4V(span.attrStepX[attr], 0.0, 0.0, 0.0, 0.0); - } - else { - GLuint c; - for (c = 0; c < 4; c++) { - float da; - span.attrStart[attr][c] = invw0 * vert0->attrib[attr][c]; - da = (invw1 * vert1->attrib[attr][c]) - span.attrStart[attr][c]; - span.attrStepX[attr][c] = da * invLen; - } - } - ASSIGN_4V(span.attrStepY[attr], 0.0, 0.0, 0.0, 0.0); - ATTRIB_LOOP_END - } -#endif - - INIT_SPAN(span, GL_LINE); - span.end = numPixels; - span.interpMask = interpFlags; - span.arrayMask = SPAN_XY; - - span.facing = swrast->PointLineFacing; - - - /* - * Draw - */ - - if (dx > dy) { - /*** X-major line ***/ - GLint i; - GLint errorInc = dy+dy; - GLint error = errorInc-dx; - GLint errorDec = error-dx; - - for (i = 0; i < dx; i++) { -#ifdef DEPTH_TYPE - GLuint Z = FixedToDepth(span.z); -#endif -#ifdef PLOT - PLOT( x0, y0 ); -#else - span.array->x[i] = x0; - span.array->y[i] = y0; -#endif - x0 += xstep; -#ifdef DEPTH_TYPE - zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrXstep); - span.z += span.zStep; -#endif -#ifdef PIXEL_ADDRESS - pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelXstep); -#endif - if (error < 0) { - error += errorInc; - } - else { - error += errorDec; - y0 += ystep; -#ifdef DEPTH_TYPE - zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrYstep); -#endif -#ifdef PIXEL_ADDRESS - pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelYstep); -#endif - } - } - } - else { - /*** Y-major line ***/ - GLint i; - GLint errorInc = dx+dx; - GLint error = errorInc-dy; - GLint errorDec = error-dy; - - for (i=0;i<dy;i++) { -#ifdef DEPTH_TYPE - GLuint Z = FixedToDepth(span.z); -#endif -#ifdef PLOT - PLOT( x0, y0 ); -#else - span.array->x[i] = x0; - span.array->y[i] = y0; -#endif - y0 += ystep; -#ifdef DEPTH_TYPE - zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrYstep); - span.z += span.zStep; -#endif -#ifdef PIXEL_ADDRESS - pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelYstep); -#endif - if (error<0) { - error += errorInc; - } - else { - error += errorDec; - x0 += xstep; -#ifdef DEPTH_TYPE - zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrXstep); -#endif -#ifdef PIXEL_ADDRESS - pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelXstep); -#endif - } - } - } - -#ifdef RENDER_SPAN - RENDER_SPAN( span ); -#endif - - (void)span; - -} - - -#undef NAME -#undef INTERP_Z -#undef INTERP_ATTRIBS -#undef PIXEL_ADDRESS -#undef PIXEL_TYPE -#undef DEPTH_TYPE -#undef BYTES_PER_ROW -#undef SETUP_CODE -#undef PLOT -#undef CLIP_HACK -#undef FixedToDepth -#undef RENDER_SPAN +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Line Rasterizer Template
+ *
+ * This file is #include'd to generate custom line rasterizers.
+ *
+ * The following macros may be defined to indicate what auxillary information
+ * must be interplated along the line:
+ * INTERP_Z - if defined, interpolate Z values
+ * INTERP_ATTRIBS - if defined, interpolate attribs (texcoords, varying, etc)
+ *
+ * When one can directly address pixels in the color buffer the following
+ * macros can be defined and used to directly compute pixel addresses during
+ * rasterization (see pixelPtr):
+ * PIXEL_TYPE - the datatype of a pixel (GLubyte, GLushort, GLuint)
+ * BYTES_PER_ROW - number of bytes per row in the color buffer
+ * PIXEL_ADDRESS(X,Y) - returns the address of pixel at (X,Y) where
+ * Y==0 at bottom of screen and increases upward.
+ *
+ * Similarly, for direct depth buffer access, this type is used for depth
+ * buffer addressing:
+ * DEPTH_TYPE - either GLushort or GLuint
+ *
+ * Optionally, one may provide one-time setup code
+ * SETUP_CODE - code which is to be executed once per line
+ *
+ * To actually "plot" each pixel the PLOT macro must be defined...
+ * PLOT(X,Y) - code to plot a pixel. Example:
+ * if (Z < *zPtr) {
+ * *zPtr = Z;
+ * color = pack_rgb( FixedToInt(r0), FixedToInt(g0),
+ * FixedToInt(b0) );
+ * put_pixel( X, Y, color );
+ * }
+ *
+ * This code was designed for the origin to be in the lower-left corner.
+ *
+ */
+
+
+static void
+NAME( struct gl_context *ctx, const SWvertex *vert0, const SWvertex *vert1 )
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLuint interpFlags = 0;
+ GLint x0 = (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][0];
+ GLint x1 = (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][0];
+ GLint y0 = (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLint y1 = (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][1];
+ GLint dx, dy;
+ GLint numPixels;
+ GLint xstep, ystep;
+#if defined(DEPTH_TYPE)
+ const GLint depthBits = ctx->DrawBuffer->Visual.depthBits;
+ const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0;
+ struct gl_renderbuffer *zrb = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+#define FixedToDepth(F) ((F) >> fixedToDepthShift)
+ GLint zPtrXstep, zPtrYstep;
+ DEPTH_TYPE *zPtr;
+#elif defined(INTERP_Z)
+ const GLint depthBits = ctx->DrawBuffer->Visual.depthBits;
+#endif
+#ifdef PIXEL_ADDRESS
+ PIXEL_TYPE *pixelPtr;
+ GLint pixelXstep, pixelYstep;
+#endif
+
+#ifdef SETUP_CODE
+ SETUP_CODE
+#endif
+
+ (void) swrast;
+
+ /* Cull primitives with malformed coordinates.
+ */
+ {
+ GLfloat tmp = vert0->attrib[FRAG_ATTRIB_WPOS][0] + vert0->attrib[FRAG_ATTRIB_WPOS][1]
+ + vert1->attrib[FRAG_ATTRIB_WPOS][0] + vert1->attrib[FRAG_ATTRIB_WPOS][1];
+ if (IS_INF_OR_NAN(tmp))
+ return;
+ }
+
+ /*
+ printf("%s():\n", __FUNCTION__);
+ printf(" (%f, %f, %f) -> (%f, %f, %f)\n",
+ vert0->attrib[FRAG_ATTRIB_WPOS][0],
+ vert0->attrib[FRAG_ATTRIB_WPOS][1],
+ vert0->attrib[FRAG_ATTRIB_WPOS][2],
+ vert1->attrib[FRAG_ATTRIB_WPOS][0],
+ vert1->attrib[FRAG_ATTRIB_WPOS][1],
+ vert1->attrib[FRAG_ATTRIB_WPOS][2]);
+ printf(" (%d, %d, %d) -> (%d, %d, %d)\n",
+ vert0->color[0], vert0->color[1], vert0->color[2],
+ vert1->color[0], vert1->color[1], vert1->color[2]);
+ printf(" (%d, %d, %d) -> (%d, %d, %d)\n",
+ vert0->specular[0], vert0->specular[1], vert0->specular[2],
+ vert1->specular[0], vert1->specular[1], vert1->specular[2]);
+ */
+
+/*
+ * Despite being clipped to the view volume, the line's window coordinates
+ * may just lie outside the window bounds. That is, if the legal window
+ * coordinates are [0,W-1][0,H-1], it's possible for x==W and/or y==H.
+ * This quick and dirty code nudges the endpoints inside the window if
+ * necessary.
+ */
+#ifdef CLIP_HACK
+ {
+ GLint w = ctx->DrawBuffer->Width;
+ GLint h = ctx->DrawBuffer->Height;
+ if ((x0==w) | (x1==w)) {
+ if ((x0==w) & (x1==w))
+ return;
+ x0 -= x0==w;
+ x1 -= x1==w;
+ }
+ if ((y0==h) | (y1==h)) {
+ if ((y0==h) & (y1==h))
+ return;
+ y0 -= y0==h;
+ y1 -= y1==h;
+ }
+ }
+#endif
+
+ dx = x1 - x0;
+ dy = y1 - y0;
+ if (dx == 0 && dy == 0)
+ return;
+
+ /*
+ printf("%s %d,%d %g %g %g %g %g %g %g %g\n", __FUNCTION__, dx, dy,
+ vert0->attrib[FRAG_ATTRIB_COL1][0],
+ vert0->attrib[FRAG_ATTRIB_COL1][1],
+ vert0->attrib[FRAG_ATTRIB_COL1][2],
+ vert0->attrib[FRAG_ATTRIB_COL1][3],
+ vert1->attrib[FRAG_ATTRIB_COL1][0],
+ vert1->attrib[FRAG_ATTRIB_COL1][1],
+ vert1->attrib[FRAG_ATTRIB_COL1][2],
+ vert1->attrib[FRAG_ATTRIB_COL1][3]);
+ */
+
+#ifdef DEPTH_TYPE
+ zPtr = (DEPTH_TYPE *) zrb->GetPointer(ctx, zrb, x0, y0);
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelPtr = (PIXEL_TYPE *) PIXEL_ADDRESS(x0,y0);
+#endif
+
+ if (dx<0) {
+ dx = -dx; /* make positive */
+ xstep = -1;
+#ifdef DEPTH_TYPE
+ zPtrXstep = -((GLint)sizeof(DEPTH_TYPE));
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelXstep = -((GLint)sizeof(PIXEL_TYPE));
+#endif
+ }
+ else {
+ xstep = 1;
+#ifdef DEPTH_TYPE
+ zPtrXstep = ((GLint)sizeof(DEPTH_TYPE));
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelXstep = ((GLint)sizeof(PIXEL_TYPE));
+#endif
+ }
+
+ if (dy<0) {
+ dy = -dy; /* make positive */
+ ystep = -1;
+#ifdef DEPTH_TYPE
+ zPtrYstep = -((GLint) (ctx->DrawBuffer->Width * sizeof(DEPTH_TYPE)));
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelYstep = BYTES_PER_ROW;
+#endif
+ }
+ else {
+ ystep = 1;
+#ifdef DEPTH_TYPE
+ zPtrYstep = (GLint) (ctx->DrawBuffer->Width * sizeof(DEPTH_TYPE));
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelYstep = -(BYTES_PER_ROW);
+#endif
+ }
+
+ ASSERT(dx >= 0);
+ ASSERT(dy >= 0);
+
+ numPixels = MAX2(dx, dy);
+
+ /*
+ * Span setup: compute start and step values for all interpolated values.
+ */
+ interpFlags |= SPAN_RGBA;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ span.red = ChanToFixed(vert0->color[0]);
+ span.green = ChanToFixed(vert0->color[1]);
+ span.blue = ChanToFixed(vert0->color[2]);
+ span.alpha = ChanToFixed(vert0->color[3]);
+ span.redStep = (ChanToFixed(vert1->color[0]) - span.red ) / numPixels;
+ span.greenStep = (ChanToFixed(vert1->color[1]) - span.green) / numPixels;
+ span.blueStep = (ChanToFixed(vert1->color[2]) - span.blue ) / numPixels;
+ span.alphaStep = (ChanToFixed(vert1->color[3]) - span.alpha) / numPixels;
+ }
+ else {
+ span.red = ChanToFixed(vert1->color[0]);
+ span.green = ChanToFixed(vert1->color[1]);
+ span.blue = ChanToFixed(vert1->color[2]);
+ span.alpha = ChanToFixed(vert1->color[3]);
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+ span.alphaStep = 0;
+ }
+#if defined(INTERP_Z) || defined(DEPTH_TYPE)
+ interpFlags |= SPAN_Z;
+ {
+ if (depthBits <= 16) {
+ span.z = FloatToFixed(vert0->attrib[FRAG_ATTRIB_WPOS][2]) + FIXED_HALF;
+ span.zStep = FloatToFixed( vert1->attrib[FRAG_ATTRIB_WPOS][2]
+ - vert0->attrib[FRAG_ATTRIB_WPOS][2]) / numPixels;
+ }
+ else {
+ /* don't use fixed point */
+ span.z = (GLuint) vert0->attrib[FRAG_ATTRIB_WPOS][2];
+ span.zStep = (GLint) (( vert1->attrib[FRAG_ATTRIB_WPOS][2]
+ - vert0->attrib[FRAG_ATTRIB_WPOS][2]) / numPixels);
+ }
+ }
+#endif
+#if defined(INTERP_ATTRIBS)
+ {
+ const GLfloat invLen = 1.0F / numPixels;
+ const GLfloat invw0 = vert0->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat invw1 = vert1->attrib[FRAG_ATTRIB_WPOS][3];
+
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = invw0;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = (invw1 - invw0) * invLen;
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0;
+
+ ATTRIB_LOOP_BEGIN
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ COPY_4V(span.attrStart[attr], vert1->attrib[attr]);
+ ASSIGN_4V(span.attrStepX[attr], 0.0, 0.0, 0.0, 0.0);
+ }
+ else {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ float da;
+ span.attrStart[attr][c] = invw0 * vert0->attrib[attr][c];
+ da = (invw1 * vert1->attrib[attr][c]) - span.attrStart[attr][c];
+ span.attrStepX[attr][c] = da * invLen;
+ }
+ }
+ ASSIGN_4V(span.attrStepY[attr], 0.0, 0.0, 0.0, 0.0);
+ ATTRIB_LOOP_END
+ }
+#endif
+
+ INIT_SPAN(span, GL_LINE);
+ span.end = numPixels;
+ span.interpMask = interpFlags;
+ span.arrayMask = SPAN_XY;
+
+ span.facing = swrast->PointLineFacing;
+
+
+ /*
+ * Draw
+ */
+
+ if (dx > dy) {
+ /*** X-major line ***/
+ GLint i;
+ GLint errorInc = dy+dy;
+ GLint error = errorInc-dx;
+ GLint errorDec = error-dx;
+
+ for (i = 0; i < dx; i++) {
+#ifdef DEPTH_TYPE
+ GLuint Z = FixedToDepth(span.z);
+#endif
+#ifdef PLOT
+ PLOT( x0, y0 );
+#else
+ span.array->x[i] = x0;
+ span.array->y[i] = y0;
+#endif
+ x0 += xstep;
+#ifdef DEPTH_TYPE
+ zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrXstep);
+ span.z += span.zStep;
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelXstep);
+#endif
+ if (error < 0) {
+ error += errorInc;
+ }
+ else {
+ error += errorDec;
+ y0 += ystep;
+#ifdef DEPTH_TYPE
+ zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrYstep);
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelYstep);
+#endif
+ }
+ }
+ }
+ else {
+ /*** Y-major line ***/
+ GLint i;
+ GLint errorInc = dx+dx;
+ GLint error = errorInc-dy;
+ GLint errorDec = error-dy;
+
+ for (i=0;i<dy;i++) {
+#ifdef DEPTH_TYPE
+ GLuint Z = FixedToDepth(span.z);
+#endif
+#ifdef PLOT
+ PLOT( x0, y0 );
+#else
+ span.array->x[i] = x0;
+ span.array->y[i] = y0;
+#endif
+ y0 += ystep;
+#ifdef DEPTH_TYPE
+ zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrYstep);
+ span.z += span.zStep;
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelYstep);
+#endif
+ if (error<0) {
+ error += errorInc;
+ }
+ else {
+ error += errorDec;
+ x0 += xstep;
+#ifdef DEPTH_TYPE
+ zPtr = (DEPTH_TYPE *) ((GLubyte*) zPtr + zPtrXstep);
+#endif
+#ifdef PIXEL_ADDRESS
+ pixelPtr = (PIXEL_TYPE*) ((GLubyte*) pixelPtr + pixelXstep);
+#endif
+ }
+ }
+ }
+
+#ifdef RENDER_SPAN
+ RENDER_SPAN( span );
+#endif
+
+ (void)span;
+
+}
+
+
+#undef NAME
+#undef INTERP_Z
+#undef INTERP_ATTRIBS
+#undef PIXEL_ADDRESS
+#undef PIXEL_TYPE
+#undef DEPTH_TYPE
+#undef BYTES_PER_ROW
+#undef SETUP_CODE
+#undef PLOT
+#undef CLIP_HACK
+#undef FixedToDepth
+#undef RENDER_SPAN
diff --git a/mesalib/src/mesa/swrast/s_logic.c b/mesalib/src/mesa/swrast/s_logic.c index c36a16e66..2f0c0ea7c 100644 --- a/mesalib/src/mesa/swrast/s_logic.c +++ b/mesalib/src/mesa/swrast/s_logic.c @@ -1,219 +1,219 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/imports.h" -#include "main/macros.h" - -#include "s_context.h" -#include "s_logic.h" -#include "s_span.h" - - -/** - * We do all logic ops on 4-byte GLuints. - * Depending on bytes per pixel, the mask array elements correspond to - * 1, 2 or 4 GLuints. - */ -#define LOGIC_OP_LOOP(MODE, MASKSTRIDE) \ -do { \ - GLuint i; \ - switch (MODE) { \ - case GL_CLEAR: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = 0; \ - } \ - } \ - break; \ - case GL_SET: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~0; \ - } \ - } \ - break; \ - case GL_COPY: \ - /* do nothing */ \ - break; \ - case GL_COPY_INVERTED: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~src[i]; \ - } \ - } \ - break; \ - case GL_NOOP: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = dest[i]; \ - } \ - } \ - break; \ - case GL_INVERT: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~dest[i]; \ - } \ - } \ - break; \ - case GL_AND: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] &= dest[i]; \ - } \ - } \ - break; \ - case GL_NAND: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~(src[i] & dest[i]); \ - } \ - } \ - break; \ - case GL_OR: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] |= dest[i]; \ - } \ - } \ - break; \ - case GL_NOR: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~(src[i] | dest[i]); \ - } \ - } \ - break; \ - case GL_XOR: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] ^= dest[i]; \ - } \ - } \ - break; \ - case GL_EQUIV: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~(src[i] ^ dest[i]); \ - } \ - } \ - break; \ - case GL_AND_REVERSE: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = src[i] & ~dest[i]; \ - } \ - } \ - break; \ - case GL_AND_INVERTED: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~src[i] & dest[i]; \ - } \ - } \ - break; \ - case GL_OR_REVERSE: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = src[i] | ~dest[i]; \ - } \ - } \ - break; \ - case GL_OR_INVERTED: \ - for (i = 0; i < n; i++) { \ - if (mask[i / MASKSTRIDE]) { \ - src[i] = ~src[i] | dest[i]; \ - } \ - } \ - break; \ - default: \ - _mesa_problem(ctx, "bad logicop mode");\ - } \ -} while (0) - - - -static INLINE void -logicop_uint1(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], - const GLubyte mask[]) -{ - LOGIC_OP_LOOP(ctx->Color.LogicOp, 1); -} - - -static INLINE void -logicop_uint2(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], - const GLubyte mask[]) -{ - LOGIC_OP_LOOP(ctx->Color.LogicOp, 2); -} - - -static INLINE void -logicop_uint4(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], - const GLubyte mask[]) -{ - LOGIC_OP_LOOP(ctx->Color.LogicOp, 4); -} - - - -/** - * Apply the current logic operator to a span of RGBA pixels. - * We can handle horizontal runs of pixels (spans) or arrays of x/y - * pixel coordinates. - */ -void -_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span) -{ - void *rbPixels; - - ASSERT(span->end < MAX_WIDTH); - ASSERT(span->arrayMask & SPAN_RGBA); - ASSERT(rb->DataType == span->array->ChanType); - - rbPixels = _swrast_get_dest_rgba(ctx, rb, span); - - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - /* treat 4*GLubyte as GLuint */ - logicop_uint1(ctx, span->end, - (GLuint *) span->array->rgba8, - (const GLuint *) rbPixels, span->array->mask); - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - /* treat 2*GLushort as GLuint */ - logicop_uint2(ctx, 2 * span->end, - (GLuint *) span->array->rgba16, - (const GLuint *) rbPixels, span->array->mask); - } - else { - logicop_uint4(ctx, 4 * span->end, - (GLuint *) span->array->attribs[FRAG_ATTRIB_COL0], - (const GLuint *) rbPixels, span->array->mask); - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_logic.h"
+#include "s_span.h"
+
+
+/**
+ * We do all logic ops on 4-byte GLuints.
+ * Depending on bytes per pixel, the mask array elements correspond to
+ * 1, 2 or 4 GLuints.
+ */
+#define LOGIC_OP_LOOP(MODE, MASKSTRIDE) \
+do { \
+ GLuint i; \
+ switch (MODE) { \
+ case GL_CLEAR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = 0; \
+ } \
+ } \
+ break; \
+ case GL_SET: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~0; \
+ } \
+ } \
+ break; \
+ case GL_COPY: \
+ /* do nothing */ \
+ break; \
+ case GL_COPY_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~src[i]; \
+ } \
+ } \
+ break; \
+ case GL_NOOP: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_INVERT: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_AND: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] &= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_NAND: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~(src[i] & dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_OR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] |= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_NOR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~(src[i] | dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_XOR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] ^= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_EQUIV: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~(src[i] ^ dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_AND_REVERSE: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = src[i] & ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_AND_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~src[i] & dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_OR_REVERSE: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = src[i] | ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_OR_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i / MASKSTRIDE]) { \
+ src[i] = ~src[i] | dest[i]; \
+ } \
+ } \
+ break; \
+ default: \
+ _mesa_problem(ctx, "bad logicop mode");\
+ } \
+} while (0)
+
+
+
+static INLINE void
+logicop_uint1(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp, 1);
+}
+
+
+static INLINE void
+logicop_uint2(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp, 2);
+}
+
+
+static INLINE void
+logicop_uint4(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp, 4);
+}
+
+
+
+/**
+ * Apply the current logic operator to a span of RGBA pixels.
+ * We can handle horizontal runs of pixels (spans) or arrays of x/y
+ * pixel coordinates.
+ */
+void
+_swrast_logicop_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span)
+{
+ void *rbPixels;
+
+ ASSERT(span->end < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(rb->DataType == span->array->ChanType);
+
+ rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
+
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ /* treat 4*GLubyte as GLuint */
+ logicop_uint1(ctx, span->end,
+ (GLuint *) span->array->rgba8,
+ (const GLuint *) rbPixels, span->array->mask);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ /* treat 2*GLushort as GLuint */
+ logicop_uint2(ctx, 2 * span->end,
+ (GLuint *) span->array->rgba16,
+ (const GLuint *) rbPixels, span->array->mask);
+ }
+ else {
+ logicop_uint4(ctx, 4 * span->end,
+ (GLuint *) span->array->attribs[FRAG_ATTRIB_COL0],
+ (const GLuint *) rbPixels, span->array->mask);
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_logic.h b/mesalib/src/mesa/swrast/s_logic.h index d60951334..39713b990 100644 --- a/mesalib/src/mesa/swrast/s_logic.h +++ b/mesalib/src/mesa/swrast/s_logic.h @@ -1,38 +1,40 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_LOGIC_H -#define S_LOGIC_H - - -#include "main/mtypes.h" -#include "s_span.h" - -extern void -_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_LOGIC_H
+#define S_LOGIC_H
+
+
+#include "s_span.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+extern void
+_swrast_logicop_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_masking.c b/mesalib/src/mesa/swrast/s_masking.c index e38d90f19..6ee29d4b3 100644 --- a/mesalib/src/mesa/swrast/s_masking.c +++ b/mesalib/src/mesa/swrast/s_masking.c @@ -1,103 +1,103 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Implement the effect of glColorMask and glIndexMask in software. - */ - - -#include "main/glheader.h" -#include "main/macros.h" - -#include "s_context.h" -#include "s_masking.h" -#include "s_span.h" - - -/** - * Apply the color mask to a span of rgba values. - */ -void -_swrast_mask_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span, GLuint buf) -{ - const GLuint n = span->end; - void *rbPixels; - - ASSERT(n < MAX_WIDTH); - ASSERT(span->arrayMask & SPAN_RGBA); - ASSERT(rb->DataType == span->array->ChanType); - - rbPixels = _swrast_get_dest_rgba(ctx, rb, span); - - /* - * Do component masking. - * Note that we're not using span->array->mask[] here. We could... - */ - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - /* treat 4xGLubyte as 1xGLuint */ - const GLuint srcMask = *((GLuint *) ctx->Color.ColorMask[buf]); - const GLuint dstMask = ~srcMask; - const GLuint *dst = (const GLuint *) rbPixels; - GLuint *src = (GLuint *) span->array->rgba8; - GLuint i; - for (i = 0; i < n; i++) { - src[i] = (src[i] & srcMask) | (dst[i] & dstMask); - } - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - /* 2-byte components */ - /* XXX try to use 64-bit arithmetic someday */ - const GLushort rMask = ctx->Color.ColorMask[buf][RCOMP] ? 0xffff : 0x0; - const GLushort gMask = ctx->Color.ColorMask[buf][GCOMP] ? 0xffff : 0x0; - const GLushort bMask = ctx->Color.ColorMask[buf][BCOMP] ? 0xffff : 0x0; - const GLushort aMask = ctx->Color.ColorMask[buf][ACOMP] ? 0xffff : 0x0; - const GLushort (*dst)[4] = (const GLushort (*)[4]) rbPixels; - GLushort (*src)[4] = span->array->rgba16; - GLuint i; - for (i = 0; i < n; i++) { - src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask); - src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask); - src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask); - src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask); - } - } - else { - /* 4-byte components */ - const GLuint rMask = ctx->Color.ColorMask[buf][RCOMP] ? ~0x0 : 0x0; - const GLuint gMask = ctx->Color.ColorMask[buf][GCOMP] ? ~0x0 : 0x0; - const GLuint bMask = ctx->Color.ColorMask[buf][BCOMP] ? ~0x0 : 0x0; - const GLuint aMask = ctx->Color.ColorMask[buf][ACOMP] ? ~0x0 : 0x0; - const GLuint (*dst)[4] = (const GLuint (*)[4]) rbPixels; - GLuint (*src)[4] = (GLuint (*)[4]) span->array->attribs[FRAG_ATTRIB_COL0]; - GLuint i; - for (i = 0; i < n; i++) { - src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask); - src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask); - src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask); - src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask); - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Implement the effect of glColorMask and glIndexMask in software.
+ */
+
+
+#include "main/glheader.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+/**
+ * Apply the color mask to a span of rgba values.
+ */
+void
+_swrast_mask_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span, GLuint buf)
+{
+ const GLuint n = span->end;
+ void *rbPixels;
+
+ ASSERT(n < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(rb->DataType == span->array->ChanType);
+
+ rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
+
+ /*
+ * Do component masking.
+ * Note that we're not using span->array->mask[] here. We could...
+ */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ /* treat 4xGLubyte as 1xGLuint */
+ const GLuint srcMask = *((GLuint *) ctx->Color.ColorMask[buf]);
+ const GLuint dstMask = ~srcMask;
+ const GLuint *dst = (const GLuint *) rbPixels;
+ GLuint *src = (GLuint *) span->array->rgba8;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i] = (src[i] & srcMask) | (dst[i] & dstMask);
+ }
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ /* 2-byte components */
+ /* XXX try to use 64-bit arithmetic someday */
+ const GLushort rMask = ctx->Color.ColorMask[buf][RCOMP] ? 0xffff : 0x0;
+ const GLushort gMask = ctx->Color.ColorMask[buf][GCOMP] ? 0xffff : 0x0;
+ const GLushort bMask = ctx->Color.ColorMask[buf][BCOMP] ? 0xffff : 0x0;
+ const GLushort aMask = ctx->Color.ColorMask[buf][ACOMP] ? 0xffff : 0x0;
+ const GLushort (*dst)[4] = (const GLushort (*)[4]) rbPixels;
+ GLushort (*src)[4] = span->array->rgba16;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask);
+ src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask);
+ src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask);
+ src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask);
+ }
+ }
+ else {
+ /* 4-byte components */
+ const GLuint rMask = ctx->Color.ColorMask[buf][RCOMP] ? ~0x0 : 0x0;
+ const GLuint gMask = ctx->Color.ColorMask[buf][GCOMP] ? ~0x0 : 0x0;
+ const GLuint bMask = ctx->Color.ColorMask[buf][BCOMP] ? ~0x0 : 0x0;
+ const GLuint aMask = ctx->Color.ColorMask[buf][ACOMP] ? ~0x0 : 0x0;
+ const GLuint (*dst)[4] = (const GLuint (*)[4]) rbPixels;
+ GLuint (*src)[4] = (GLuint (*)[4]) span->array->attribs[FRAG_ATTRIB_COL0];
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask);
+ src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask);
+ src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask);
+ src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask);
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_masking.h b/mesalib/src/mesa/swrast/s_masking.h index cb000da0f..7ab02cc7a 100644 --- a/mesalib/src/mesa/swrast/s_masking.h +++ b/mesalib/src/mesa/swrast/s_masking.h @@ -1,38 +1,41 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_MASKING_H -#define S_MASKING_H - - -#include "main/mtypes.h" -#include "s_span.h" - - -extern void -_swrast_mask_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span, GLuint buf); - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_MASKING_H
+#define S_MASKING_H
+
+
+#include "main/glheader.h"
+#include "s_span.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+extern void
+_swrast_mask_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span, GLuint buf);
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_points.c b/mesalib/src/mesa/swrast/s_points.c index 12431662c..a46be8f58 100644 --- a/mesalib/src/mesa/swrast/s_points.c +++ b/mesalib/src/mesa/swrast/s_points.c @@ -1,572 +1,572 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/macros.h" -#include "s_context.h" -#include "s_feedback.h" -#include "s_points.h" -#include "s_span.h" - - -/** - * Used to cull points with invalid coords - */ -#define CULL_INVALID(V) \ - do { \ - float tmp = (V)->attrib[FRAG_ATTRIB_WPOS][0] \ - + (V)->attrib[FRAG_ATTRIB_WPOS][1]; \ - if (IS_INF_OR_NAN(tmp)) \ - return; \ - } while(0) - - - -/** - * Get/compute the point size. - * The size may come from a vertex shader, or computed with attentuation - * or just the glPointSize value. - * Must also clamp to user-defined range and implmentation limits. - */ -static INLINE GLfloat -get_size(const GLcontext *ctx, const SWvertex *vert, GLboolean smoothed) -{ - GLfloat size; - - if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { - /* use vertex's point size */ - size = vert->pointSize; - } - else { - /* use constant point size */ - size = ctx->Point.Size; - } - /* always clamp to user-specified limits */ - size = CLAMP(size, ctx->Point.MinSize, ctx->Point.MaxSize); - /* clamp to implementation limits */ - if (smoothed) - size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA); - else - size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize); - - return size; -} - - -/** - * Draw a point sprite - */ -static void -sprite_point(GLcontext *ctx, const SWvertex *vert) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan span; - GLfloat size; - GLuint tCoords[MAX_TEXTURE_COORD_UNITS + 1]; - GLuint numTcoords = 0; - GLfloat t0, dtdy; - - CULL_INVALID(vert); - - /* z coord */ - if (ctx->DrawBuffer->Visual.depthBits <= 16) - span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - else - span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - span.zStep = 0; - - size = get_size(ctx, vert, GL_FALSE); - - /* span init */ - INIT_SPAN(span, GL_POINT); - span.interpMask = SPAN_Z | SPAN_RGBA; - - span.facing = swrast->PointLineFacing; - - span.red = ChanToFixed(vert->color[0]); - span.green = ChanToFixed(vert->color[1]); - span.blue = ChanToFixed(vert->color[2]); - span.alpha = ChanToFixed(vert->color[3]); - span.redStep = 0; - span.greenStep = 0; - span.blueStep = 0; - span.alphaStep = 0; - - /* need these for fragment programs */ - span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; - span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; - span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; - - { - GLfloat s, r, dsdx; - - /* texcoord / pointcoord interpolants */ - s = 0.0F; - dsdx = 1.0F / size; - if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) { - dtdy = 1.0F / size; - t0 = 0.5F * dtdy; - } - else { - /* GL_UPPER_LEFT */ - dtdy = -1.0F / size; - t0 = 1.0F + 0.5F * dtdy; - } - - ATTRIB_LOOP_BEGIN - if (attr >= FRAG_ATTRIB_TEX0 && attr <= FRAG_ATTRIB_TEX7) { - /* a texcoord attribute */ - const GLuint u = attr - FRAG_ATTRIB_TEX0; - ASSERT(u < Elements(ctx->Point.CoordReplace)); - if (ctx->Point.CoordReplace[u]) { - tCoords[numTcoords++] = attr; - - if (ctx->Point.SpriteRMode == GL_ZERO) - r = 0.0F; - else if (ctx->Point.SpriteRMode == GL_S) - r = vert->attrib[attr][0]; - else /* GL_R */ - r = vert->attrib[attr][2]; - - span.attrStart[attr][0] = s; - span.attrStart[attr][1] = 0.0; /* overwritten below */ - span.attrStart[attr][2] = r; - span.attrStart[attr][3] = 1.0; - - span.attrStepX[attr][0] = dsdx; - span.attrStepX[attr][1] = 0.0; - span.attrStepX[attr][2] = 0.0; - span.attrStepX[attr][3] = 0.0; - - span.attrStepY[attr][0] = 0.0; - span.attrStepY[attr][1] = dtdy; - span.attrStepY[attr][2] = 0.0; - span.attrStepY[attr][3] = 0.0; - - continue; - } - } - else if (attr == FRAG_ATTRIB_PNTC) { - /* GLSL gl_PointCoord.xy (.zw undefined) */ - span.attrStart[FRAG_ATTRIB_PNTC][0] = 0.0; - span.attrStart[FRAG_ATTRIB_PNTC][1] = 0.0; /* t0 set below */ - span.attrStepX[FRAG_ATTRIB_PNTC][0] = dsdx; - span.attrStepX[FRAG_ATTRIB_PNTC][1] = 0.0; - span.attrStepY[FRAG_ATTRIB_PNTC][0] = 0.0; - span.attrStepY[FRAG_ATTRIB_PNTC][1] = dtdy; - tCoords[numTcoords++] = FRAG_ATTRIB_PNTC; - continue; - } - /* use vertex's texcoord/attrib */ - COPY_4V(span.attrStart[attr], vert->attrib[attr]); - ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); - ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); - ATTRIB_LOOP_END; - } - - /* compute pos, bounds and render */ - { - const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; - const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; - GLint iSize = (GLint) (size + 0.5F); - GLint xmin, xmax, ymin, ymax, iy; - GLint iRadius; - GLfloat tcoord = t0; - - iSize = MAX2(1, iSize); - iRadius = iSize / 2; - - if (iSize & 1) { - /* odd size */ - xmin = (GLint) (x - iRadius); - xmax = (GLint) (x + iRadius); - ymin = (GLint) (y - iRadius); - ymax = (GLint) (y + iRadius); - } - else { - /* even size */ - /* 0.501 factor allows conformance to pass */ - xmin = (GLint) (x + 0.501) - iRadius; - xmax = xmin + iSize - 1; - ymin = (GLint) (y + 0.501) - iRadius; - ymax = ymin + iSize - 1; - } - - /* render spans */ - for (iy = ymin; iy <= ymax; iy++) { - GLuint i; - /* setup texcoord T for this row */ - for (i = 0; i < numTcoords; i++) { - span.attrStart[tCoords[i]][1] = tcoord; - } - - /* these might get changed by span clipping */ - span.x = xmin; - span.y = iy; - span.end = xmax - xmin + 1; - - _swrast_write_rgba_span(ctx, &span); - - tcoord += dtdy; - } - } -} - - -/** - * Draw smooth/antialiased point. RGB or CI mode. - */ -static void -smooth_point(GLcontext *ctx, const SWvertex *vert) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan span; - GLfloat size, alphaAtten; - - CULL_INVALID(vert); - - /* z coord */ - if (ctx->DrawBuffer->Visual.depthBits <= 16) - span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - else - span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - span.zStep = 0; - - size = get_size(ctx, vert, GL_TRUE); - - /* alpha attenuation / fade factor */ - if (ctx->Multisample._Enabled) { - if (vert->pointSize >= ctx->Point.Threshold) { - alphaAtten = 1.0F; - } - else { - GLfloat dsize = vert->pointSize / ctx->Point.Threshold; - alphaAtten = dsize * dsize; - } - } - else { - alphaAtten = 1.0; - } - (void) alphaAtten; /* not used */ - - /* span init */ - INIT_SPAN(span, GL_POINT); - span.interpMask = SPAN_Z | SPAN_RGBA; - span.arrayMask = SPAN_COVERAGE | SPAN_MASK; - - span.facing = swrast->PointLineFacing; - - span.red = ChanToFixed(vert->color[0]); - span.green = ChanToFixed(vert->color[1]); - span.blue = ChanToFixed(vert->color[2]); - span.alpha = ChanToFixed(vert->color[3]); - span.redStep = 0; - span.greenStep = 0; - span.blueStep = 0; - span.alphaStep = 0; - - /* need these for fragment programs */ - span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; - span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; - span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; - - ATTRIB_LOOP_BEGIN - COPY_4V(span.attrStart[attr], vert->attrib[attr]); - ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); - ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); - ATTRIB_LOOP_END - - /* compute pos, bounds and render */ - { - const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; - const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; - const GLfloat radius = 0.5F * size; - const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */ - const GLfloat rmax = radius + 0.7071F; - const GLfloat rmin2 = MAX2(0.0F, rmin * rmin); - const GLfloat rmax2 = rmax * rmax; - const GLfloat cscale = 1.0F / (rmax2 - rmin2); - const GLint xmin = (GLint) (x - radius); - const GLint xmax = (GLint) (x + radius); - const GLint ymin = (GLint) (y - radius); - const GLint ymax = (GLint) (y + radius); - GLint ix, iy; - - for (iy = ymin; iy <= ymax; iy++) { - - /* these might get changed by span clipping */ - span.x = xmin; - span.y = iy; - span.end = xmax - xmin + 1; - - /* compute coverage for each pixel in span */ - for (ix = xmin; ix <= xmax; ix++) { - const GLfloat dx = ix - x + 0.5F; - const GLfloat dy = iy - y + 0.5F; - const GLfloat dist2 = dx * dx + dy * dy; - GLfloat coverage; - - if (dist2 < rmax2) { - if (dist2 >= rmin2) { - /* compute partial coverage */ - coverage = 1.0F - (dist2 - rmin2) * cscale; - } - else { - /* full coverage */ - coverage = 1.0F; - } - span.array->mask[ix - xmin] = 1; - } - else { - /* zero coverage - fragment outside the radius */ - coverage = 0.0; - span.array->mask[ix - xmin] = 0; - } - span.array->coverage[ix - xmin] = coverage; - } - - /* render span */ - _swrast_write_rgba_span(ctx, &span); - - } - } -} - - -/** - * Draw large (size >= 1) non-AA point. RGB or CI mode. - */ -static void -large_point(GLcontext *ctx, const SWvertex *vert) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan span; - GLfloat size; - - CULL_INVALID(vert); - - /* z coord */ - if (ctx->DrawBuffer->Visual.depthBits <= 16) - span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - else - span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - span.zStep = 0; - - size = get_size(ctx, vert, GL_FALSE); - - /* span init */ - INIT_SPAN(span, GL_POINT); - span.arrayMask = SPAN_XY; - span.facing = swrast->PointLineFacing; - - span.interpMask = SPAN_Z | SPAN_RGBA; - span.red = ChanToFixed(vert->color[0]); - span.green = ChanToFixed(vert->color[1]); - span.blue = ChanToFixed(vert->color[2]); - span.alpha = ChanToFixed(vert->color[3]); - span.redStep = 0; - span.greenStep = 0; - span.blueStep = 0; - span.alphaStep = 0; - - /* need these for fragment programs */ - span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; - span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; - span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; - - ATTRIB_LOOP_BEGIN - COPY_4V(span.attrStart[attr], vert->attrib[attr]); - ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); - ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); - ATTRIB_LOOP_END - - /* compute pos, bounds and render */ - { - const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; - const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; - GLint iSize = (GLint) (size + 0.5F); - GLint xmin, xmax, ymin, ymax, ix, iy; - GLint iRadius; - - iSize = MAX2(1, iSize); - iRadius = iSize / 2; - - if (iSize & 1) { - /* odd size */ - xmin = (GLint) (x - iRadius); - xmax = (GLint) (x + iRadius); - ymin = (GLint) (y - iRadius); - ymax = (GLint) (y + iRadius); - } - else { - /* even size */ - /* 0.501 factor allows conformance to pass */ - xmin = (GLint) (x + 0.501) - iRadius; - xmax = xmin + iSize - 1; - ymin = (GLint) (y + 0.501) - iRadius; - ymax = ymin + iSize - 1; - } - - /* generate fragments */ - span.end = 0; - for (iy = ymin; iy <= ymax; iy++) { - for (ix = xmin; ix <= xmax; ix++) { - span.array->x[span.end] = ix; - span.array->y[span.end] = iy; - span.end++; - } - } - assert(span.end <= MAX_WIDTH); - _swrast_write_rgba_span(ctx, &span); - } -} - - -/** - * Draw size=1, single-pixel point - */ -static void -pixel_point(GLcontext *ctx, const SWvertex *vert) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - /* - * Note that unlike the other functions, we put single-pixel points - * into a special span array in order to render as many points as - * possible with a single _swrast_write_rgba_span() call. - */ - SWspan *span = &(swrast->PointSpan); - GLuint count; - - CULL_INVALID(vert); - - /* Span init */ - span->interpMask = 0; - span->arrayMask = SPAN_XY | SPAN_Z; - span->arrayMask |= SPAN_RGBA; - /*span->arrayMask |= SPAN_LAMBDA;*/ - span->arrayAttribs = swrast->_ActiveAttribMask; /* we'll produce these vals */ - - /* need these for fragment programs */ - span->attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; - span->attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; - span->attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; - - /* check if we need to flush */ - if (span->end >= MAX_WIDTH || - (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT)) || - span->facing != swrast->PointLineFacing) { - if (span->end > 0) { - _swrast_write_rgba_span(ctx, span); - span->end = 0; - } - } - - count = span->end; - - span->facing = swrast->PointLineFacing; - - /* fragment attributes */ - span->array->rgba[count][RCOMP] = vert->color[0]; - span->array->rgba[count][GCOMP] = vert->color[1]; - span->array->rgba[count][BCOMP] = vert->color[2]; - span->array->rgba[count][ACOMP] = vert->color[3]; - - ATTRIB_LOOP_BEGIN - COPY_4V(span->array->attribs[attr][count], vert->attrib[attr]); - ATTRIB_LOOP_END - - /* fragment position */ - span->array->x[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][0]; - span->array->y[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][1]; - span->array->z[count] = (GLint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); - - span->end = count + 1; - ASSERT(span->end <= MAX_WIDTH); -} - - -/** - * Add specular color to primary color, draw point, restore original - * primary color. - */ -void -_swrast_add_spec_terms_point(GLcontext *ctx, const SWvertex *v0) -{ - SWvertex *ncv0 = (SWvertex *) v0; /* cast away const */ - GLfloat rSum, gSum, bSum; - GLchan cSave[4]; - - /* save */ - COPY_CHAN4(cSave, ncv0->color); - /* sum */ - rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum); - /* draw */ - SWRAST_CONTEXT(ctx)->SpecPoint(ctx, ncv0); - /* restore */ - COPY_CHAN4(ncv0->color, cSave); -} - - -/** - * Examine current state to determine which point drawing function to use. - */ -void -_swrast_choose_point(GLcontext *ctx) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLfloat size = CLAMP(ctx->Point.Size, - ctx->Point.MinSize, - ctx->Point.MaxSize); - - if (ctx->RenderMode == GL_RENDER) { - if (ctx->Point.PointSprite) { - swrast->Point = sprite_point; - } - else if (ctx->Point.SmoothFlag) { - swrast->Point = smooth_point; - } - else if (size > 1.0 || - ctx->Point._Attenuated || - ctx->VertexProgram.PointSizeEnabled) { - swrast->Point = large_point; - } - else { - swrast->Point = pixel_point; - } - } - else if (ctx->RenderMode == GL_FEEDBACK) { - swrast->Point = _swrast_feedback_point; - } - else { - /* GL_SELECT mode */ - swrast->Point = _swrast_select_point; - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_points.h"
+#include "s_span.h"
+
+
+/**
+ * Used to cull points with invalid coords
+ */
+#define CULL_INVALID(V) \
+ do { \
+ float tmp = (V)->attrib[FRAG_ATTRIB_WPOS][0] \
+ + (V)->attrib[FRAG_ATTRIB_WPOS][1]; \
+ if (IS_INF_OR_NAN(tmp)) \
+ return; \
+ } while(0)
+
+
+
+/**
+ * Get/compute the point size.
+ * The size may come from a vertex shader, or computed with attentuation
+ * or just the glPointSize value.
+ * Must also clamp to user-defined range and implmentation limits.
+ */
+static INLINE GLfloat
+get_size(const struct gl_context *ctx, const SWvertex *vert, GLboolean smoothed)
+{
+ GLfloat size;
+
+ if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ /* use vertex's point size */
+ size = vert->pointSize;
+ }
+ else {
+ /* use constant point size */
+ size = ctx->Point.Size;
+ }
+ /* always clamp to user-specified limits */
+ size = CLAMP(size, ctx->Point.MinSize, ctx->Point.MaxSize);
+ /* clamp to implementation limits */
+ if (smoothed)
+ size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA);
+ else
+ size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize);
+
+ return size;
+}
+
+
+/**
+ * Draw a point sprite
+ */
+static void
+sprite_point(struct gl_context *ctx, const SWvertex *vert)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLfloat size;
+ GLuint tCoords[MAX_TEXTURE_COORD_UNITS + 1];
+ GLuint numTcoords = 0;
+ GLfloat t0, dtdy;
+
+ CULL_INVALID(vert);
+
+ /* z coord */
+ if (ctx->DrawBuffer->Visual.depthBits <= 16)
+ span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ else
+ span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ span.zStep = 0;
+
+ size = get_size(ctx, vert, GL_FALSE);
+
+ /* span init */
+ INIT_SPAN(span, GL_POINT);
+ span.interpMask = SPAN_Z | SPAN_RGBA;
+
+ span.facing = swrast->PointLineFacing;
+
+ span.red = ChanToFixed(vert->color[0]);
+ span.green = ChanToFixed(vert->color[1]);
+ span.blue = ChanToFixed(vert->color[2]);
+ span.alpha = ChanToFixed(vert->color[3]);
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+ span.alphaStep = 0;
+
+ /* need these for fragment programs */
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F;
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F;
+
+ {
+ GLfloat s, r, dsdx;
+
+ /* texcoord / pointcoord interpolants */
+ s = 0.0F;
+ dsdx = 1.0F / size;
+ if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) {
+ dtdy = 1.0F / size;
+ t0 = 0.5F * dtdy;
+ }
+ else {
+ /* GL_UPPER_LEFT */
+ dtdy = -1.0F / size;
+ t0 = 1.0F + 0.5F * dtdy;
+ }
+
+ ATTRIB_LOOP_BEGIN
+ if (attr >= FRAG_ATTRIB_TEX0 && attr <= FRAG_ATTRIB_TEX7) {
+ /* a texcoord attribute */
+ const GLuint u = attr - FRAG_ATTRIB_TEX0;
+ ASSERT(u < Elements(ctx->Point.CoordReplace));
+ if (ctx->Point.CoordReplace[u]) {
+ tCoords[numTcoords++] = attr;
+
+ if (ctx->Point.SpriteRMode == GL_ZERO)
+ r = 0.0F;
+ else if (ctx->Point.SpriteRMode == GL_S)
+ r = vert->attrib[attr][0];
+ else /* GL_R */
+ r = vert->attrib[attr][2];
+
+ span.attrStart[attr][0] = s;
+ span.attrStart[attr][1] = 0.0; /* overwritten below */
+ span.attrStart[attr][2] = r;
+ span.attrStart[attr][3] = 1.0;
+
+ span.attrStepX[attr][0] = dsdx;
+ span.attrStepX[attr][1] = 0.0;
+ span.attrStepX[attr][2] = 0.0;
+ span.attrStepX[attr][3] = 0.0;
+
+ span.attrStepY[attr][0] = 0.0;
+ span.attrStepY[attr][1] = dtdy;
+ span.attrStepY[attr][2] = 0.0;
+ span.attrStepY[attr][3] = 0.0;
+
+ continue;
+ }
+ }
+ else if (attr == FRAG_ATTRIB_PNTC) {
+ /* GLSL gl_PointCoord.xy (.zw undefined) */
+ span.attrStart[FRAG_ATTRIB_PNTC][0] = 0.0;
+ span.attrStart[FRAG_ATTRIB_PNTC][1] = 0.0; /* t0 set below */
+ span.attrStepX[FRAG_ATTRIB_PNTC][0] = dsdx;
+ span.attrStepX[FRAG_ATTRIB_PNTC][1] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_PNTC][0] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_PNTC][1] = dtdy;
+ tCoords[numTcoords++] = FRAG_ATTRIB_PNTC;
+ continue;
+ }
+ /* use vertex's texcoord/attrib */
+ COPY_4V(span.attrStart[attr], vert->attrib[attr]);
+ ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0);
+ ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0);
+ ATTRIB_LOOP_END;
+ }
+
+ /* compute pos, bounds and render */
+ {
+ const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0];
+ const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1];
+ GLint iSize = (GLint) (size + 0.5F);
+ GLint xmin, xmax, ymin, ymax, iy;
+ GLint iRadius;
+ GLfloat tcoord = t0;
+
+ iSize = MAX2(1, iSize);
+ iRadius = iSize / 2;
+
+ if (iSize & 1) {
+ /* odd size */
+ xmin = (GLint) (x - iRadius);
+ xmax = (GLint) (x + iRadius);
+ ymin = (GLint) (y - iRadius);
+ ymax = (GLint) (y + iRadius);
+ }
+ else {
+ /* even size */
+ /* 0.501 factor allows conformance to pass */
+ xmin = (GLint) (x + 0.501) - iRadius;
+ xmax = xmin + iSize - 1;
+ ymin = (GLint) (y + 0.501) - iRadius;
+ ymax = ymin + iSize - 1;
+ }
+
+ /* render spans */
+ for (iy = ymin; iy <= ymax; iy++) {
+ GLuint i;
+ /* setup texcoord T for this row */
+ for (i = 0; i < numTcoords; i++) {
+ span.attrStart[tCoords[i]][1] = tcoord;
+ }
+
+ /* these might get changed by span clipping */
+ span.x = xmin;
+ span.y = iy;
+ span.end = xmax - xmin + 1;
+
+ _swrast_write_rgba_span(ctx, &span);
+
+ tcoord += dtdy;
+ }
+ }
+}
+
+
+/**
+ * Draw smooth/antialiased point. RGB or CI mode.
+ */
+static void
+smooth_point(struct gl_context *ctx, const SWvertex *vert)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLfloat size, alphaAtten;
+
+ CULL_INVALID(vert);
+
+ /* z coord */
+ if (ctx->DrawBuffer->Visual.depthBits <= 16)
+ span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ else
+ span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ span.zStep = 0;
+
+ size = get_size(ctx, vert, GL_TRUE);
+
+ /* alpha attenuation / fade factor */
+ if (ctx->Multisample._Enabled) {
+ if (vert->pointSize >= ctx->Point.Threshold) {
+ alphaAtten = 1.0F;
+ }
+ else {
+ GLfloat dsize = vert->pointSize / ctx->Point.Threshold;
+ alphaAtten = dsize * dsize;
+ }
+ }
+ else {
+ alphaAtten = 1.0;
+ }
+ (void) alphaAtten; /* not used */
+
+ /* span init */
+ INIT_SPAN(span, GL_POINT);
+ span.interpMask = SPAN_Z | SPAN_RGBA;
+ span.arrayMask = SPAN_COVERAGE | SPAN_MASK;
+
+ span.facing = swrast->PointLineFacing;
+
+ span.red = ChanToFixed(vert->color[0]);
+ span.green = ChanToFixed(vert->color[1]);
+ span.blue = ChanToFixed(vert->color[2]);
+ span.alpha = ChanToFixed(vert->color[3]);
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+ span.alphaStep = 0;
+
+ /* need these for fragment programs */
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F;
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F;
+
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(span.attrStart[attr], vert->attrib[attr]);
+ ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0);
+ ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0);
+ ATTRIB_LOOP_END
+
+ /* compute pos, bounds and render */
+ {
+ const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0];
+ const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1];
+ const GLfloat radius = 0.5F * size;
+ const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
+ const GLfloat rmax = radius + 0.7071F;
+ const GLfloat rmin2 = MAX2(0.0F, rmin * rmin);
+ const GLfloat rmax2 = rmax * rmax;
+ const GLfloat cscale = 1.0F / (rmax2 - rmin2);
+ const GLint xmin = (GLint) (x - radius);
+ const GLint xmax = (GLint) (x + radius);
+ const GLint ymin = (GLint) (y - radius);
+ const GLint ymax = (GLint) (y + radius);
+ GLint ix, iy;
+
+ for (iy = ymin; iy <= ymax; iy++) {
+
+ /* these might get changed by span clipping */
+ span.x = xmin;
+ span.y = iy;
+ span.end = xmax - xmin + 1;
+
+ /* compute coverage for each pixel in span */
+ for (ix = xmin; ix <= xmax; ix++) {
+ const GLfloat dx = ix - x + 0.5F;
+ const GLfloat dy = iy - y + 0.5F;
+ const GLfloat dist2 = dx * dx + dy * dy;
+ GLfloat coverage;
+
+ if (dist2 < rmax2) {
+ if (dist2 >= rmin2) {
+ /* compute partial coverage */
+ coverage = 1.0F - (dist2 - rmin2) * cscale;
+ }
+ else {
+ /* full coverage */
+ coverage = 1.0F;
+ }
+ span.array->mask[ix - xmin] = 1;
+ }
+ else {
+ /* zero coverage - fragment outside the radius */
+ coverage = 0.0;
+ span.array->mask[ix - xmin] = 0;
+ }
+ span.array->coverage[ix - xmin] = coverage;
+ }
+
+ /* render span */
+ _swrast_write_rgba_span(ctx, &span);
+
+ }
+ }
+}
+
+
+/**
+ * Draw large (size >= 1) non-AA point. RGB or CI mode.
+ */
+static void
+large_point(struct gl_context *ctx, const SWvertex *vert)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLfloat size;
+
+ CULL_INVALID(vert);
+
+ /* z coord */
+ if (ctx->DrawBuffer->Visual.depthBits <= 16)
+ span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ else
+ span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+ span.zStep = 0;
+
+ size = get_size(ctx, vert, GL_FALSE);
+
+ /* span init */
+ INIT_SPAN(span, GL_POINT);
+ span.arrayMask = SPAN_XY;
+ span.facing = swrast->PointLineFacing;
+
+ span.interpMask = SPAN_Z | SPAN_RGBA;
+ span.red = ChanToFixed(vert->color[0]);
+ span.green = ChanToFixed(vert->color[1]);
+ span.blue = ChanToFixed(vert->color[2]);
+ span.alpha = ChanToFixed(vert->color[3]);
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+ span.alphaStep = 0;
+
+ /* need these for fragment programs */
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F;
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F;
+
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(span.attrStart[attr], vert->attrib[attr]);
+ ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0);
+ ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0);
+ ATTRIB_LOOP_END
+
+ /* compute pos, bounds and render */
+ {
+ const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0];
+ const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1];
+ GLint iSize = (GLint) (size + 0.5F);
+ GLint xmin, xmax, ymin, ymax, ix, iy;
+ GLint iRadius;
+
+ iSize = MAX2(1, iSize);
+ iRadius = iSize / 2;
+
+ if (iSize & 1) {
+ /* odd size */
+ xmin = (GLint) (x - iRadius);
+ xmax = (GLint) (x + iRadius);
+ ymin = (GLint) (y - iRadius);
+ ymax = (GLint) (y + iRadius);
+ }
+ else {
+ /* even size */
+ /* 0.501 factor allows conformance to pass */
+ xmin = (GLint) (x + 0.501) - iRadius;
+ xmax = xmin + iSize - 1;
+ ymin = (GLint) (y + 0.501) - iRadius;
+ ymax = ymin + iSize - 1;
+ }
+
+ /* generate fragments */
+ span.end = 0;
+ for (iy = ymin; iy <= ymax; iy++) {
+ for (ix = xmin; ix <= xmax; ix++) {
+ span.array->x[span.end] = ix;
+ span.array->y[span.end] = iy;
+ span.end++;
+ }
+ }
+ assert(span.end <= MAX_WIDTH);
+ _swrast_write_rgba_span(ctx, &span);
+ }
+}
+
+
+/**
+ * Draw size=1, single-pixel point
+ */
+static void
+pixel_point(struct gl_context *ctx, const SWvertex *vert)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ /*
+ * Note that unlike the other functions, we put single-pixel points
+ * into a special span array in order to render as many points as
+ * possible with a single _swrast_write_rgba_span() call.
+ */
+ SWspan *span = &(swrast->PointSpan);
+ GLuint count;
+
+ CULL_INVALID(vert);
+
+ /* Span init */
+ span->interpMask = 0;
+ span->arrayMask = SPAN_XY | SPAN_Z;
+ span->arrayMask |= SPAN_RGBA;
+ /*span->arrayMask |= SPAN_LAMBDA;*/
+ span->arrayAttribs = swrast->_ActiveAttribMask; /* we'll produce these vals */
+
+ /* need these for fragment programs */
+ span->attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F;
+ span->attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F;
+ span->attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F;
+
+ /* check if we need to flush */
+ if (span->end >= MAX_WIDTH ||
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT)) ||
+ span->facing != swrast->PointLineFacing) {
+ if (span->end > 0) {
+ _swrast_write_rgba_span(ctx, span);
+ span->end = 0;
+ }
+ }
+
+ count = span->end;
+
+ span->facing = swrast->PointLineFacing;
+
+ /* fragment attributes */
+ span->array->rgba[count][RCOMP] = vert->color[0];
+ span->array->rgba[count][GCOMP] = vert->color[1];
+ span->array->rgba[count][BCOMP] = vert->color[2];
+ span->array->rgba[count][ACOMP] = vert->color[3];
+
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(span->array->attribs[attr][count], vert->attrib[attr]);
+ ATTRIB_LOOP_END
+
+ /* fragment position */
+ span->array->x[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][0];
+ span->array->y[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][1];
+ span->array->z[count] = (GLint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
+
+ span->end = count + 1;
+ ASSERT(span->end <= MAX_WIDTH);
+}
+
+
+/**
+ * Add specular color to primary color, draw point, restore original
+ * primary color.
+ */
+void
+_swrast_add_spec_terms_point(struct gl_context *ctx, const SWvertex *v0)
+{
+ SWvertex *ncv0 = (SWvertex *) v0; /* cast away const */
+ GLfloat rSum, gSum, bSum;
+ GLchan cSave[4];
+
+ /* save */
+ COPY_CHAN4(cSave, ncv0->color);
+ /* sum */
+ rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
+ /* draw */
+ SWRAST_CONTEXT(ctx)->SpecPoint(ctx, ncv0);
+ /* restore */
+ COPY_CHAN4(ncv0->color, cSave);
+}
+
+
+/**
+ * Examine current state to determine which point drawing function to use.
+ */
+void
+_swrast_choose_point(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLfloat size = CLAMP(ctx->Point.Size,
+ ctx->Point.MinSize,
+ ctx->Point.MaxSize);
+
+ if (ctx->RenderMode == GL_RENDER) {
+ if (ctx->Point.PointSprite) {
+ swrast->Point = sprite_point;
+ }
+ else if (ctx->Point.SmoothFlag) {
+ swrast->Point = smooth_point;
+ }
+ else if (size > 1.0 ||
+ ctx->Point._Attenuated ||
+ ctx->VertexProgram.PointSizeEnabled) {
+ swrast->Point = large_point;
+ }
+ else {
+ swrast->Point = pixel_point;
+ }
+ }
+ else if (ctx->RenderMode == GL_FEEDBACK) {
+ swrast->Point = _swrast_feedback_point;
+ }
+ else {
+ /* GL_SELECT mode */
+ swrast->Point = _swrast_select_point;
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_points.h b/mesalib/src/mesa/swrast/s_points.h index 9e39c601e..d99470bfe 100644 --- a/mesalib/src/mesa/swrast/s_points.h +++ b/mesalib/src/mesa/swrast/s_points.h @@ -1,39 +1,39 @@ - -/* - * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_POINTS_H -#define S_POINTS_H - -#include "swrast.h" - -extern void -_swrast_choose_point( GLcontext *ctx ); - -extern void -_swrast_add_spec_terms_point( GLcontext *ctx, - const SWvertex *v0 ); - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_POINTS_H
+#define S_POINTS_H
+
+#include "swrast.h"
+
+extern void
+_swrast_choose_point( struct gl_context *ctx );
+
+extern void
+_swrast_add_spec_terms_point( struct gl_context *ctx,
+ const SWvertex *v0 );
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_readpix.c b/mesalib/src/mesa/swrast/s_readpix.c index 1de481248..61399010b 100644 --- a/mesalib/src/mesa/swrast/s_readpix.c +++ b/mesalib/src/mesa/swrast/s_readpix.c @@ -1,578 +1,508 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/bufferobj.h" -#include "main/colormac.h" -#include "main/convolve.h" -#include "main/feedback.h" -#include "main/formats.h" -#include "main/image.h" -#include "main/macros.h" -#include "main/imports.h" -#include "main/state.h" - -#include "s_context.h" -#include "s_depth.h" -#include "s_span.h" -#include "s_stencil.h" - - -/** - * Read pixels for format=GL_DEPTH_COMPONENT. - */ -static void -read_depth_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *rb = fb->_DepthBuffer; - const GLboolean biasOrScale - = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; - - if (!rb) - return; - - /* clipping should have been done already */ - ASSERT(x >= 0); - ASSERT(y >= 0); - ASSERT(x + width <= (GLint) rb->Width); - ASSERT(y + height <= (GLint) rb->Height); - /* width should never be > MAX_WIDTH since we did clipping earlier */ - ASSERT(width <= MAX_WIDTH); - - if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16 - && !biasOrScale && !packing->SwapBytes) { - /* Special case: directly read 16-bit unsigned depth values. */ - GLint j; - ASSERT(rb->Format == MESA_FORMAT_Z16); - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - for (j = 0; j < height; j++, y++) { - void *dest =_mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_COMPONENT, type, j, 0); - rb->GetRow(ctx, rb, width, x, y, dest); - } - } - else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24 - && !biasOrScale && !packing->SwapBytes) { - /* Special case: directly read 24-bit unsigned depth values. */ - GLint j; - ASSERT(rb->Format == MESA_FORMAT_X8_Z24 || - rb->Format == MESA_FORMAT_S8_Z24 || - rb->Format == MESA_FORMAT_Z24_X8 || - rb->Format == MESA_FORMAT_Z24_S8); - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8); - for (j = 0; j < height; j++, y++) { - GLuint *dest = (GLuint *) - _mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_COMPONENT, type, j, 0); - GLint k; - rb->GetRow(ctx, rb, width, x, y, dest); - /* convert range from 24-bit to 32-bit */ - if (rb->Format == MESA_FORMAT_X8_Z24 || - rb->Format == MESA_FORMAT_S8_Z24) { - for (k = 0; k < width; k++) { - /* Note: put MSByte of 24-bit value into LSByte */ - dest[k] = (dest[k] << 8) | ((dest[k] >> 16) & 0xff); - } - } - else { - for (k = 0; k < width; k++) { - /* Note: fill in LSByte by replication */ - dest[k] = dest[k] | ((dest[k] >> 8) & 0xff); - } - } - } - } - else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32 - && !biasOrScale && !packing->SwapBytes) { - /* Special case: directly read 32-bit unsigned depth values. */ - GLint j; - ASSERT(rb->Format == MESA_FORMAT_Z32); - ASSERT(rb->DataType == GL_UNSIGNED_INT); - for (j = 0; j < height; j++, y++) { - void *dest = _mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_COMPONENT, type, j, 0); - rb->GetRow(ctx, rb, width, x, y, dest); - } - } - else { - /* General case (slower) */ - GLint j; - for (j = 0; j < height; j++, y++) { - GLfloat depthValues[MAX_WIDTH]; - GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_COMPONENT, type, j, 0); - _swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues); - _mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing); - } - } -} - - -/** - * Read pixels for format=GL_STENCIL_INDEX. - */ -static void -read_stencil_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - GLint j; - - if (!rb) - return; - - /* width should never be > MAX_WIDTH since we did clipping earlier */ - ASSERT(width <= MAX_WIDTH); - - /* process image row by row */ - for (j=0;j<height;j++,y++) { - GLvoid *dest; - GLstencil stencil[MAX_WIDTH]; - - _swrast_read_stencil_span(ctx, rb, width, x, y, stencil); - - dest = _mesa_image_address2d(packing, pixels, width, height, - GL_STENCIL_INDEX, type, j, 0); - - _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing); - } -} - - - -/** - * Optimized glReadPixels for particular pixel formats when pixel - * scaling, biasing, mapping, etc. are disabled. - * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels - */ -static GLboolean -fast_read_rgba_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - GLvoid *pixels, - const struct gl_pixelstore_attrib *packing, - GLbitfield transferOps) -{ - struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - - if (!rb) - return GL_FALSE; - - ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB || - rb->_BaseFormat == GL_ALPHA); - - /* clipping should have already been done */ - ASSERT(x + width <= (GLint) rb->Width); - ASSERT(y + height <= (GLint) rb->Height); - - /* check for things we can't handle here */ - if (transferOps || - packing->SwapBytes || - packing->LsbFirst) { - return GL_FALSE; - } - - if (format == GL_RGBA && rb->DataType == type) { - const GLint dstStride = _mesa_image_row_stride(packing, width, - format, type); - GLubyte *dest - = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, - format, type, 0, 0); - GLint row; - ASSERT(rb->GetRow); - for (row = 0; row < height; row++) { - rb->GetRow(ctx, rb, width, x, y + row, dest); - dest += dstStride; - } - return GL_TRUE; - } - - if (format == GL_RGB && - rb->DataType == GL_UNSIGNED_BYTE && - type == GL_UNSIGNED_BYTE) { - const GLint dstStride = _mesa_image_row_stride(packing, width, - format, type); - GLubyte *dest - = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, - format, type, 0, 0); - GLint row; - ASSERT(rb->GetRow); - for (row = 0; row < height; row++) { - GLubyte tempRow[MAX_WIDTH][4]; - GLint col; - rb->GetRow(ctx, rb, width, x, y + row, tempRow); - /* convert RGBA to RGB */ - for (col = 0; col < width; col++) { - dest[col * 3 + 0] = tempRow[col][0]; - dest[col * 3 + 1] = tempRow[col][1]; - dest[col * 3 + 2] = tempRow[col][2]; - } - dest += dstStride; - } - return GL_TRUE; - } - - /* not handled */ - return GL_FALSE; -} - - -/** - * When we're using a low-precision color buffer (like 16-bit 5/6/5) - * we have to adjust our color values a bit to pass conformance. - * The problem is when a 5 or 6-bit color value is converted to an 8-bit - * value and then a floating point value, the floating point values don't - * increment uniformly as the 5 or 6-bit value is incremented. - * - * This function adjusts floating point values to compensate. - */ -static void -adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4]) -{ - const GLuint rShift = 8 - fb->Visual.redBits; - const GLuint gShift = 8 - fb->Visual.greenBits; - const GLuint bShift = 8 - fb->Visual.blueBits; - GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1); - GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1); - GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1); - GLuint i; - - if (fb->Visual.redBits == 0) - rScale = 0; - if (fb->Visual.greenBits == 0) - gScale = 0; - if (fb->Visual.blueBits == 0) - bScale = 0; - - for (i = 0; i < n; i++) { - GLint r, g, b; - /* convert float back to ubyte */ - CLAMPED_FLOAT_TO_UBYTE(r, rgba[i][RCOMP]); - CLAMPED_FLOAT_TO_UBYTE(g, rgba[i][GCOMP]); - CLAMPED_FLOAT_TO_UBYTE(b, rgba[i][BCOMP]); - /* using only the N most significant bits of the ubyte value, convert to - * float in [0,1]. - */ - rgba[i][RCOMP] = (GLfloat) (r >> rShift) * rScale; - rgba[i][GCOMP] = (GLfloat) (g >> gShift) * gScale; - rgba[i][BCOMP] = (GLfloat) (b >> bShift) * bScale; - } -} - - - -/* - * Read R, G, B, A, RGB, L, or LA pixels. - */ -static void -read_rgba_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLbitfield transferOps = ctx->_ImageTransferState; - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *rb = fb->_ColorReadBuffer; - - if (!rb) - return; - - if (type == GL_FLOAT && ((ctx->Color.ClampReadColor == GL_TRUE) || - (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB && - rb->DataType != GL_FLOAT))) - transferOps |= IMAGE_CLAMP_BIT; - - /* Try optimized path first */ - if (fast_read_rgba_pixels(ctx, x, y, width, height, - format, type, pixels, packing, transferOps)) { - return; /* done! */ - } - - /* width should never be > MAX_WIDTH since we did clipping earlier */ - ASSERT(width <= MAX_WIDTH); - - if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { - GLfloat *dest, *src, *tmpImage, *convImage; - GLint row; - - tmpImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!tmpImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); - return; - } - convImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - if (!convImage) { - free(tmpImage); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); - return; - } - - /* read full RGBA, FLOAT image */ - dest = tmpImage; - for (row = 0; row < height; row++, y++) { - _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, dest); - _mesa_apply_rgba_transfer_ops(ctx, - transferOps & IMAGE_PRE_CONVOLUTION_BITS, - width, (GLfloat (*)[4]) dest); - dest += width * 4; - } - - /* do convolution */ - if (ctx->Pixel.Convolution2DEnabled) { - _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage); - } - else { - ASSERT(ctx->Pixel.Separable2DEnabled); - _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage); - } - free(tmpImage); - - /* finish transfer ops and pack the resulting image */ - src = convImage; - for (row = 0; row < height; row++) { - GLvoid *dest; - dest = _mesa_image_address2d(packing, pixels, width, height, - format, type, row, 0); - _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) src, - format, type, dest, packing, - transferOps & IMAGE_POST_CONVOLUTION_BITS); - src += width * 4; - } - free(convImage); - } - else { - /* no convolution */ - const GLint dstStride - = _mesa_image_row_stride(packing, width, format, type); - GLfloat (*rgba)[4] = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0]; - GLint row; - GLubyte *dst - = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, - format, type, 0, 0); - - /* make sure we don't apply 1D convolution */ - transferOps &= ~(IMAGE_CONVOLUTION_BIT | - IMAGE_POST_CONVOLUTION_SCALE_BIAS); - - for (row = 0; row < height; row++, y++) { - - /* Get float rgba pixels */ - _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba); - - /* apply fudge factor for shallow color buffers */ - if (fb->Visual.redBits < 8 || - fb->Visual.greenBits < 8 || - fb->Visual.blueBits < 8) { - adjust_colors(fb, width, rgba); - } - - /* pack the row of RGBA pixels into user's buffer */ - _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst, - packing, transferOps); - - dst += dstStride; - } - } -} - - -/** - * Read combined depth/stencil values. - * We'll have already done error checking to be sure the expected - * depth and stencil buffers really exist. - */ -static void -read_depth_stencil_pixels(GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - const GLboolean scaleOrBias - = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; - const GLboolean stencilTransfer = ctx->Pixel.IndexShift - || ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag; - struct gl_renderbuffer *depthRb, *stencilRb; - - depthRb = ctx->ReadBuffer->_DepthBuffer; - stencilRb = ctx->ReadBuffer->_StencilBuffer; - - if (!depthRb || !stencilRb) - return; - - depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; - stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; - - if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && - stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && - depthRb == stencilRb && - !scaleOrBias && - !stencilTransfer) { - /* This is the ideal case. - * Reading GL_DEPTH_STENCIL pixels from combined depth/stencil buffer. - * Plus, no pixel transfer ops to worry about! - */ - GLint i; - GLint dstStride = _mesa_image_row_stride(packing, width, - GL_DEPTH_STENCIL_EXT, type); - GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, pixels, - width, height, - GL_DEPTH_STENCIL_EXT, - type, 0, 0); - for (i = 0; i < height; i++) { - depthRb->GetRow(ctx, depthRb, width, x, y + i, dst); - dst += dstStride; - } - } - else { - /* Reading GL_DEPTH_STENCIL pixels from separate depth/stencil buffers, - * or we need pixel transfer. - */ - GLint i; - depthRb = ctx->ReadBuffer->_DepthBuffer; - stencilRb = ctx->ReadBuffer->_StencilBuffer; - - for (i = 0; i < height; i++) { - GLstencil stencilVals[MAX_WIDTH]; - - GLuint *depthStencilDst = (GLuint *) - _mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_STENCIL_EXT, type, i, 0); - - _swrast_read_stencil_span(ctx, stencilRb, width, - x, y + i, stencilVals); - - if (!scaleOrBias && !stencilTransfer - && ctx->ReadBuffer->Visual.depthBits == 24) { - /* ideal case */ - GLuint zVals[MAX_WIDTH]; /* 24-bit values! */ - GLint j; - ASSERT(depthRb->DataType == GL_UNSIGNED_INT); - /* note, we've already been clipped */ - depthRb->GetRow(ctx, depthRb, width, x, y + i, zVals); - for (j = 0; j < width; j++) { - depthStencilDst[j] = (zVals[j] << 8) | (stencilVals[j] & 0xff); - } - } - else { - /* general case */ - GLfloat depthVals[MAX_WIDTH]; - _swrast_read_depth_span_float(ctx, depthRb, width, x, y + i, - depthVals); - _mesa_pack_depth_stencil_span(ctx, width, depthStencilDst, - depthVals, stencilVals, packing); - } - } - } -} - - - -/** - * Software fallback routine for ctx->Driver.ReadPixels(). - * By time we get here, all error checking will have been done. - */ -void -_swrast_ReadPixels( GLcontext *ctx, - GLint x, GLint y, GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *packing, - GLvoid *pixels ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_pixelstore_attrib clippedPacking = *packing; - - if (ctx->NewState) - _mesa_update_state(ctx); - - /* Need to do swrast_render_start() before clipping or anything else - * since this is where a driver may grab the hw lock and get an updated - * window size. - */ - swrast_render_start(ctx); - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - /* Do all needed clipping here, so that we can forget about it later */ - if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) { - /* The ReadPixels region is totally outside the window bounds */ - swrast_render_finish(ctx); - return; - } - - pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels); - if (!pixels) - return; - - switch (format) { - case GL_STENCIL_INDEX: - read_stencil_pixels(ctx, x, y, width, height, type, pixels, - &clippedPacking); - break; - case GL_DEPTH_COMPONENT: - read_depth_pixels(ctx, x, y, width, height, type, pixels, - &clippedPacking); - break; - case GL_RED: - case GL_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_RGB: - case GL_LUMINANCE: - case GL_LUMINANCE_ALPHA: - case GL_RGBA: - case GL_BGR: - case GL_BGRA: - case GL_ABGR_EXT: - read_rgba_pixels(ctx, x, y, width, height, - format, type, pixels, &clippedPacking); - break; - case GL_DEPTH_STENCIL_EXT: - read_depth_stencil_pixels(ctx, x, y, width, height, - type, pixels, &clippedPacking); - break; - default: - _mesa_problem(ctx, "unexpected format in _swrast_ReadPixels"); - /* don't return yet, clean-up */ - } - - swrast_render_finish(ctx); - - _mesa_unmap_pbo_dest(ctx, &clippedPacking); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/colormac.h"
+#include "main/feedback.h"
+#include "main/formats.h"
+#include "main/image.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/pack.h"
+#include "main/state.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_span.h"
+#include "s_stencil.h"
+
+
+/**
+ * Read pixels for format=GL_DEPTH_COMPONENT.
+ */
+static void
+read_depth_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ const GLboolean biasOrScale
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+
+ if (!rb)
+ return;
+
+ /* clipping should have been done already */
+ ASSERT(x >= 0);
+ ASSERT(y >= 0);
+ ASSERT(x + width <= (GLint) rb->Width);
+ ASSERT(y + height <= (GLint) rb->Height);
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 16-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_Z16);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest =_mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 24-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_X8_Z24 ||
+ rb->Format == MESA_FORMAT_S8_Z24 ||
+ rb->Format == MESA_FORMAT_Z24_X8 ||
+ rb->Format == MESA_FORMAT_Z24_S8);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8);
+ for (j = 0; j < height; j++, y++) {
+ GLuint *dest = (GLuint *)
+ _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ GLint k;
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ /* convert range from 24-bit to 32-bit */
+ if (rb->Format == MESA_FORMAT_X8_Z24 ||
+ rb->Format == MESA_FORMAT_S8_Z24) {
+ for (k = 0; k < width; k++) {
+ /* Note: put MSByte of 24-bit value into LSByte */
+ dest[k] = (dest[k] << 8) | ((dest[k] >> 16) & 0xff);
+ }
+ }
+ else {
+ for (k = 0; k < width; k++) {
+ /* Note: fill in LSByte by replication */
+ dest[k] = dest[k] | ((dest[k] >> 8) & 0xff);
+ }
+ }
+ }
+ }
+ else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 32-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_Z32);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ }
+ }
+ else {
+ /* General case (slower) */
+ GLint j;
+ for (j = 0; j < height; j++, y++) {
+ GLfloat depthValues[MAX_WIDTH];
+ GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ _swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues);
+ _mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing);
+ }
+ }
+}
+
+
+/**
+ * Read pixels for format=GL_STENCIL_INDEX.
+ */
+static void
+read_stencil_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ GLint j;
+
+ if (!rb)
+ return;
+
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ /* process image row by row */
+ for (j=0;j<height;j++,y++) {
+ GLvoid *dest;
+ GLstencil stencil[MAX_WIDTH];
+
+ _swrast_read_stencil_span(ctx, rb, width, x, y, stencil);
+
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_STENCIL_INDEX, type, j, 0);
+
+ _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
+ }
+}
+
+
+
+/**
+ * Optimized glReadPixels for particular pixel formats when pixel
+ * scaling, biasing, mapping, etc. are disabled.
+ * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels
+ */
+static GLboolean
+fast_read_rgba_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing,
+ GLbitfield transferOps)
+{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+
+ if (!rb)
+ return GL_FALSE;
+
+ ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB ||
+ rb->_BaseFormat == GL_ALPHA);
+
+ /* clipping should have already been done */
+ ASSERT(x + width <= (GLint) rb->Width);
+ ASSERT(y + height <= (GLint) rb->Height);
+
+ /* check for things we can't handle here */
+ if (transferOps ||
+ packing->SwapBytes ||
+ packing->LsbFirst) {
+ return GL_FALSE;
+ }
+
+ if (format == GL_RGBA && rb->DataType == type) {
+ const GLint dstStride = _mesa_image_row_stride(packing, width,
+ format, type);
+ GLubyte *dest
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+ GLint row;
+ ASSERT(rb->GetRow);
+ for (row = 0; row < height; row++) {
+ rb->GetRow(ctx, rb, width, x, y + row, dest);
+ dest += dstStride;
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_RGB &&
+ rb->DataType == GL_UNSIGNED_BYTE &&
+ type == GL_UNSIGNED_BYTE) {
+ const GLint dstStride = _mesa_image_row_stride(packing, width,
+ format, type);
+ GLubyte *dest
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+ GLint row;
+ ASSERT(rb->GetRow);
+ for (row = 0; row < height; row++) {
+ GLubyte tempRow[MAX_WIDTH][4];
+ GLint col;
+ rb->GetRow(ctx, rb, width, x, y + row, tempRow);
+ /* convert RGBA to RGB */
+ for (col = 0; col < width; col++) {
+ dest[col * 3 + 0] = tempRow[col][0];
+ dest[col * 3 + 1] = tempRow[col][1];
+ dest[col * 3 + 2] = tempRow[col][2];
+ }
+ dest += dstStride;
+ }
+ return GL_TRUE;
+ }
+
+ /* not handled */
+ return GL_FALSE;
+}
+
+
+/**
+ * When we're using a low-precision color buffer (like 16-bit 5/6/5)
+ * we have to adjust our color values a bit to pass conformance.
+ * The problem is when a 5 or 6-bit color value is converted to an 8-bit
+ * value and then a floating point value, the floating point values don't
+ * increment uniformly as the 5 or 6-bit value is incremented.
+ *
+ * This function adjusts floating point values to compensate.
+ */
+static void
+adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4])
+{
+ const GLuint rShift = 8 - fb->Visual.redBits;
+ const GLuint gShift = 8 - fb->Visual.greenBits;
+ const GLuint bShift = 8 - fb->Visual.blueBits;
+ GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1);
+ GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1);
+ GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1);
+ GLuint i;
+
+ if (fb->Visual.redBits == 0)
+ rScale = 0;
+ if (fb->Visual.greenBits == 0)
+ gScale = 0;
+ if (fb->Visual.blueBits == 0)
+ bScale = 0;
+
+ for (i = 0; i < n; i++) {
+ GLint r, g, b;
+ /* convert float back to ubyte */
+ CLAMPED_FLOAT_TO_UBYTE(r, rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_UBYTE(g, rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_UBYTE(b, rgba[i][BCOMP]);
+ /* using only the N most significant bits of the ubyte value, convert to
+ * float in [0,1].
+ */
+ rgba[i][RCOMP] = (GLfloat) (r >> rShift) * rScale;
+ rgba[i][GCOMP] = (GLfloat) (g >> gShift) * gScale;
+ rgba[i][BCOMP] = (GLfloat) (b >> bShift) * bScale;
+ }
+}
+
+
+
+/*
+ * Read R, G, B, A, RGB, L, or LA pixels.
+ */
+static void
+read_rgba_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLbitfield transferOps = ctx->_ImageTransferState;
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
+
+ if (!rb)
+ return;
+
+ if (type == GL_FLOAT && ((ctx->Color.ClampReadColor == GL_TRUE) ||
+ (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB &&
+ rb->DataType != GL_FLOAT)))
+ transferOps |= IMAGE_CLAMP_BIT;
+
+ /* Try optimized path first */
+ if (fast_read_rgba_pixels(ctx, x, y, width, height,
+ format, type, pixels, packing, transferOps)) {
+ return; /* done! */
+ }
+
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ do {
+ const GLint dstStride
+ = _mesa_image_row_stride(packing, width, format, type);
+ GLfloat (*rgba)[4] = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
+ GLint row;
+ GLubyte *dst
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+
+ for (row = 0; row < height; row++, y++) {
+
+ /* Get float rgba pixels */
+ _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
+
+ /* apply fudge factor for shallow color buffers */
+ if (fb->Visual.redBits < 8 ||
+ fb->Visual.greenBits < 8 ||
+ fb->Visual.blueBits < 8) {
+ adjust_colors(fb, width, rgba);
+ }
+
+ /* pack the row of RGBA pixels into user's buffer */
+ _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
+ packing, transferOps);
+
+ dst += dstStride;
+ }
+ } while (0);
+}
+
+
+/**
+ * Read combined depth/stencil values.
+ * We'll have already done error checking to be sure the expected
+ * depth and stencil buffers really exist.
+ */
+static void
+read_depth_stencil_pixels(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLboolean stencilTransfer = ctx->Pixel.IndexShift
+ || ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
+ struct gl_renderbuffer *depthRb, *stencilRb;
+
+ depthRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilRb = ctx->ReadBuffer->_StencilBuffer;
+
+ if (!depthRb || !stencilRb)
+ return;
+
+ depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+
+ if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ depthRb == stencilRb &&
+ !scaleOrBias &&
+ !stencilTransfer) {
+ /* This is the ideal case.
+ * Reading GL_DEPTH_STENCIL pixels from combined depth/stencil buffer.
+ * Plus, no pixel transfer ops to worry about!
+ */
+ GLint i;
+ GLint dstStride = _mesa_image_row_stride(packing, width,
+ GL_DEPTH_STENCIL_EXT, type);
+ GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
+ width, height,
+ GL_DEPTH_STENCIL_EXT,
+ type, 0, 0);
+ for (i = 0; i < height; i++) {
+ depthRb->GetRow(ctx, depthRb, width, x, y + i, dst);
+ dst += dstStride;
+ }
+ }
+ else {
+ /* Reading GL_DEPTH_STENCIL pixels from separate depth/stencil buffers,
+ * or we need pixel transfer.
+ */
+ GLint i;
+ depthRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilRb = ctx->ReadBuffer->_StencilBuffer;
+
+ for (i = 0; i < height; i++) {
+ GLstencil stencilVals[MAX_WIDTH];
+
+ GLuint *depthStencilDst = (GLuint *)
+ _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+
+ _swrast_read_stencil_span(ctx, stencilRb, width,
+ x, y + i, stencilVals);
+
+ if (!scaleOrBias && !stencilTransfer
+ && ctx->ReadBuffer->Visual.depthBits == 24) {
+ /* ideal case */
+ GLuint zVals[MAX_WIDTH]; /* 24-bit values! */
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
+ /* note, we've already been clipped */
+ depthRb->GetRow(ctx, depthRb, width, x, y + i, zVals);
+ for (j = 0; j < width; j++) {
+ depthStencilDst[j] = (zVals[j] << 8) | (stencilVals[j] & 0xff);
+ }
+ }
+ else {
+ /* general case */
+ GLfloat depthVals[MAX_WIDTH];
+ _swrast_read_depth_span_float(ctx, depthRb, width, x, y + i,
+ depthVals);
+ _mesa_pack_depth_stencil_span(ctx, width, depthStencilDst,
+ depthVals, stencilVals, packing);
+ }
+ }
+ }
+}
+
+
+
+/**
+ * Software fallback routine for ctx->Driver.ReadPixels().
+ * By time we get here, all error checking will have been done.
+ */
+void
+_swrast_ReadPixels( struct gl_context *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *packing,
+ GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_pixelstore_attrib clippedPacking = *packing;
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ /* Need to do swrast_render_start() before clipping or anything else
+ * since this is where a driver may grab the hw lock and get an updated
+ * window size.
+ */
+ swrast_render_start(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ /* Do all needed clipping here, so that we can forget about it later */
+ if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
+
+ pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
+
+ if (pixels) {
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ read_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_COMPONENT:
+ read_depth_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ default:
+ /* all other formats should be color formats */
+ read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
+ &clippedPacking);
+ }
+
+ _mesa_unmap_pbo_dest(ctx, &clippedPacking);
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_span.c b/mesalib/src/mesa/swrast/s_span.c index 28c82990e..029c88b29 100644 --- a/mesalib/src/mesa/swrast/s_span.c +++ b/mesalib/src/mesa/swrast/s_span.c @@ -1,1502 +1,1502 @@ -/* - * Mesa 3-D graphics library - * Version: 7.5 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * Copyright (C) 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/** - * \file swrast/s_span.c - * \brief Span processing functions used by all rasterization functions. - * This is where all the per-fragment tests are performed - * \author Brian Paul - */ - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/macros.h" -#include "main/imports.h" -#include "main/image.h" - -#include "s_atifragshader.h" -#include "s_alpha.h" -#include "s_blend.h" -#include "s_context.h" -#include "s_depth.h" -#include "s_fog.h" -#include "s_logic.h" -#include "s_masking.h" -#include "s_fragprog.h" -#include "s_span.h" -#include "s_stencil.h" -#include "s_texcombine.h" - - -/** - * Set default fragment attributes for the span using the - * current raster values. Used prior to glDraw/CopyPixels - * and glBitmap. - */ -void -_swrast_span_default_attribs(GLcontext *ctx, SWspan *span) -{ - GLchan r, g, b, a; - /* Z*/ - { - const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF; - if (ctx->DrawBuffer->Visual.depthBits <= 16) - span->z = FloatToFixed(ctx->Current.RasterPos[2] * depthMax + 0.5F); - else { - GLfloat tmpf = ctx->Current.RasterPos[2] * depthMax; - tmpf = MIN2(tmpf, depthMax); - span->z = (GLint)tmpf; - } - span->zStep = 0; - span->interpMask |= SPAN_Z; - } - - /* W (for perspective correction) */ - span->attrStart[FRAG_ATTRIB_WPOS][3] = 1.0; - span->attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0; - span->attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0; - - /* primary color, or color index */ - UNCLAMPED_FLOAT_TO_CHAN(r, ctx->Current.RasterColor[0]); - UNCLAMPED_FLOAT_TO_CHAN(g, ctx->Current.RasterColor[1]); - UNCLAMPED_FLOAT_TO_CHAN(b, ctx->Current.RasterColor[2]); - UNCLAMPED_FLOAT_TO_CHAN(a, ctx->Current.RasterColor[3]); -#if CHAN_TYPE == GL_FLOAT - span->red = r; - span->green = g; - span->blue = b; - span->alpha = a; -#else - span->red = IntToFixed(r); - span->green = IntToFixed(g); - span->blue = IntToFixed(b); - span->alpha = IntToFixed(a); -#endif - span->redStep = 0; - span->greenStep = 0; - span->blueStep = 0; - span->alphaStep = 0; - span->interpMask |= SPAN_RGBA; - - COPY_4V(span->attrStart[FRAG_ATTRIB_COL0], ctx->Current.RasterColor); - ASSIGN_4V(span->attrStepX[FRAG_ATTRIB_COL0], 0.0, 0.0, 0.0, 0.0); - ASSIGN_4V(span->attrStepY[FRAG_ATTRIB_COL0], 0.0, 0.0, 0.0, 0.0); - - /* Secondary color */ - if (ctx->Light.Enabled || ctx->Fog.ColorSumEnabled) - { - COPY_4V(span->attrStart[FRAG_ATTRIB_COL1], ctx->Current.RasterSecondaryColor); - ASSIGN_4V(span->attrStepX[FRAG_ATTRIB_COL1], 0.0, 0.0, 0.0, 0.0); - ASSIGN_4V(span->attrStepY[FRAG_ATTRIB_COL1], 0.0, 0.0, 0.0, 0.0); - } - - /* fog */ - { - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLfloat fogVal; /* a coord or a blend factor */ - if (swrast->_PreferPixelFog) { - /* fog blend factors will be computed from fog coordinates per pixel */ - fogVal = ctx->Current.RasterDistance; - } - else { - /* fog blend factor should be computed from fogcoord now */ - fogVal = _swrast_z_to_fogfactor(ctx, ctx->Current.RasterDistance); - } - span->attrStart[FRAG_ATTRIB_FOGC][0] = fogVal; - span->attrStepX[FRAG_ATTRIB_FOGC][0] = 0.0; - span->attrStepY[FRAG_ATTRIB_FOGC][0] = 0.0; - } - - /* texcoords */ - { - GLuint i; - for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { - const GLuint attr = FRAG_ATTRIB_TEX0 + i; - const GLfloat *tc = ctx->Current.RasterTexCoords[i]; - if (ctx->FragmentProgram._Current || ctx->ATIFragmentShader._Enabled) { - COPY_4V(span->attrStart[attr], tc); - } - else if (tc[3] > 0.0F) { - /* use (s/q, t/q, r/q, 1) */ - span->attrStart[attr][0] = tc[0] / tc[3]; - span->attrStart[attr][1] = tc[1] / tc[3]; - span->attrStart[attr][2] = tc[2] / tc[3]; - span->attrStart[attr][3] = 1.0; - } - else { - ASSIGN_4V(span->attrStart[attr], 0.0F, 0.0F, 0.0F, 1.0F); - } - ASSIGN_4V(span->attrStepX[attr], 0.0F, 0.0F, 0.0F, 0.0F); - ASSIGN_4V(span->attrStepY[attr], 0.0F, 0.0F, 0.0F, 0.0F); - } - } -} - - -/** - * Interpolate the active attributes (and'd with attrMask) to - * fill in span->array->attribs[]. - * Perspective correction will be done. The point/line/triangle function - * should have computed attrStart/Step values for FRAG_ATTRIB_WPOS[3]! - */ -static INLINE void -interpolate_active_attribs(GLcontext *ctx, SWspan *span, GLbitfield attrMask) -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - - /* - * Don't overwrite existing array values, such as colors that may have - * been produced by glDraw/CopyPixels. - */ - attrMask &= ~span->arrayAttribs; - - ATTRIB_LOOP_BEGIN - if (attrMask & (1 << attr)) { - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; - const GLfloat dv0dx = span->attrStepX[attr][0]; - const GLfloat dv1dx = span->attrStepX[attr][1]; - const GLfloat dv2dx = span->attrStepX[attr][2]; - const GLfloat dv3dx = span->attrStepX[attr][3]; - GLfloat v0 = span->attrStart[attr][0] + span->leftClip * dv0dx; - GLfloat v1 = span->attrStart[attr][1] + span->leftClip * dv1dx; - GLfloat v2 = span->attrStart[attr][2] + span->leftClip * dv2dx; - GLfloat v3 = span->attrStart[attr][3] + span->leftClip * dv3dx; - GLuint k; - for (k = 0; k < span->end; k++) { - const GLfloat invW = 1.0f / w; - span->array->attribs[attr][k][0] = v0 * invW; - span->array->attribs[attr][k][1] = v1 * invW; - span->array->attribs[attr][k][2] = v2 * invW; - span->array->attribs[attr][k][3] = v3 * invW; - v0 += dv0dx; - v1 += dv1dx; - v2 += dv2dx; - v3 += dv3dx; - w += dwdx; - } - ASSERT((span->arrayAttribs & (1 << attr)) == 0); - span->arrayAttribs |= (1 << attr); - } - ATTRIB_LOOP_END -} - - -/** - * Interpolate primary colors to fill in the span->array->rgba8 (or rgb16) - * color array. - */ -static INLINE void -interpolate_int_colors(GLcontext *ctx, SWspan *span) -{ - const GLuint n = span->end; - GLuint i; - -#if CHAN_BITS != 32 - ASSERT(!(span->arrayMask & SPAN_RGBA)); -#endif - - switch (span->array->ChanType) { -#if CHAN_BITS != 32 - case GL_UNSIGNED_BYTE: - { - GLubyte (*rgba)[4] = span->array->rgba8; - if (span->interpMask & SPAN_FLAT) { - GLubyte color[4]; - color[RCOMP] = FixedToInt(span->red); - color[GCOMP] = FixedToInt(span->green); - color[BCOMP] = FixedToInt(span->blue); - color[ACOMP] = FixedToInt(span->alpha); - for (i = 0; i < n; i++) { - COPY_4UBV(rgba[i], color); - } - } - else { - GLfixed r = span->red; - GLfixed g = span->green; - GLfixed b = span->blue; - GLfixed a = span->alpha; - GLint dr = span->redStep; - GLint dg = span->greenStep; - GLint db = span->blueStep; - GLint da = span->alphaStep; - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = FixedToChan(r); - rgba[i][GCOMP] = FixedToChan(g); - rgba[i][BCOMP] = FixedToChan(b); - rgba[i][ACOMP] = FixedToChan(a); - r += dr; - g += dg; - b += db; - a += da; - } - } - } - break; - case GL_UNSIGNED_SHORT: - { - GLushort (*rgba)[4] = span->array->rgba16; - if (span->interpMask & SPAN_FLAT) { - GLushort color[4]; - color[RCOMP] = FixedToInt(span->red); - color[GCOMP] = FixedToInt(span->green); - color[BCOMP] = FixedToInt(span->blue); - color[ACOMP] = FixedToInt(span->alpha); - for (i = 0; i < n; i++) { - COPY_4V(rgba[i], color); - } - } - else { - GLushort (*rgba)[4] = span->array->rgba16; - GLfixed r, g, b, a; - GLint dr, dg, db, da; - r = span->red; - g = span->green; - b = span->blue; - a = span->alpha; - dr = span->redStep; - dg = span->greenStep; - db = span->blueStep; - da = span->alphaStep; - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = FixedToChan(r); - rgba[i][GCOMP] = FixedToChan(g); - rgba[i][BCOMP] = FixedToChan(b); - rgba[i][ACOMP] = FixedToChan(a); - r += dr; - g += dg; - b += db; - a += da; - } - } - } - break; -#endif - case GL_FLOAT: - interpolate_active_attribs(ctx, span, FRAG_BIT_COL0); - break; - default: - _mesa_problem(NULL, "bad datatype in interpolate_int_colors"); - } - span->arrayMask |= SPAN_RGBA; -} - - -/** - * Populate the FRAG_ATTRIB_COL0 array. - */ -static INLINE void -interpolate_float_colors(SWspan *span) -{ - GLfloat (*col0)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - const GLuint n = span->end; - GLuint i; - - assert(!(span->arrayAttribs & FRAG_BIT_COL0)); - - if (span->arrayMask & SPAN_RGBA) { - /* convert array of int colors */ - for (i = 0; i < n; i++) { - col0[i][0] = UBYTE_TO_FLOAT(span->array->rgba8[i][0]); - col0[i][1] = UBYTE_TO_FLOAT(span->array->rgba8[i][1]); - col0[i][2] = UBYTE_TO_FLOAT(span->array->rgba8[i][2]); - col0[i][3] = UBYTE_TO_FLOAT(span->array->rgba8[i][3]); - } - } - else { - /* interpolate red/green/blue/alpha to get float colors */ - ASSERT(span->interpMask & SPAN_RGBA); - if (span->interpMask & SPAN_FLAT) { - GLfloat r = FixedToFloat(span->red); - GLfloat g = FixedToFloat(span->green); - GLfloat b = FixedToFloat(span->blue); - GLfloat a = FixedToFloat(span->alpha); - for (i = 0; i < n; i++) { - ASSIGN_4V(col0[i], r, g, b, a); - } - } - else { - GLfloat r = FixedToFloat(span->red); - GLfloat g = FixedToFloat(span->green); - GLfloat b = FixedToFloat(span->blue); - GLfloat a = FixedToFloat(span->alpha); - GLfloat dr = FixedToFloat(span->redStep); - GLfloat dg = FixedToFloat(span->greenStep); - GLfloat db = FixedToFloat(span->blueStep); - GLfloat da = FixedToFloat(span->alphaStep); - for (i = 0; i < n; i++) { - col0[i][0] = r; - col0[i][1] = g; - col0[i][2] = b; - col0[i][3] = a; - r += dr; - g += dg; - b += db; - a += da; - } - } - } - - span->arrayAttribs |= FRAG_BIT_COL0; - span->array->ChanType = GL_FLOAT; -} - - - -/** - * Fill in the span.zArray array from the span->z, zStep values. - */ -void -_swrast_span_interpolate_z( const GLcontext *ctx, SWspan *span ) -{ - const GLuint n = span->end; - GLuint i; - - ASSERT(!(span->arrayMask & SPAN_Z)); - - if (ctx->DrawBuffer->Visual.depthBits <= 16) { - GLfixed zval = span->z; - GLuint *z = span->array->z; - for (i = 0; i < n; i++) { - z[i] = FixedToInt(zval); - zval += span->zStep; - } - } - else { - /* Deep Z buffer, no fixed->int shift */ - GLuint zval = span->z; - GLuint *z = span->array->z; - for (i = 0; i < n; i++) { - z[i] = zval; - zval += span->zStep; - } - } - span->interpMask &= ~SPAN_Z; - span->arrayMask |= SPAN_Z; -} - - -/** - * Compute mipmap LOD from partial derivatives. - * This the ideal solution, as given in the OpenGL spec. - */ -GLfloat -_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy, - GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH, - GLfloat s, GLfloat t, GLfloat q, GLfloat invQ) -{ - GLfloat dudx = texW * ((s + dsdx) / (q + dqdx) - s * invQ); - GLfloat dvdx = texH * ((t + dtdx) / (q + dqdx) - t * invQ); - GLfloat dudy = texW * ((s + dsdy) / (q + dqdy) - s * invQ); - GLfloat dvdy = texH * ((t + dtdy) / (q + dqdy) - t * invQ); - GLfloat x = SQRTF(dudx * dudx + dvdx * dvdx); - GLfloat y = SQRTF(dudy * dudy + dvdy * dvdy); - GLfloat rho = MAX2(x, y); - GLfloat lambda = LOG2(rho); - return lambda; -} - - -/** - * Compute mipmap LOD from partial derivatives. - * This is a faster approximation than above function. - */ -#if 0 -GLfloat -_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy, - GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH, - GLfloat s, GLfloat t, GLfloat q, GLfloat invQ) -{ - GLfloat dsdx2 = (s + dsdx) / (q + dqdx) - s * invQ; - GLfloat dtdx2 = (t + dtdx) / (q + dqdx) - t * invQ; - GLfloat dsdy2 = (s + dsdy) / (q + dqdy) - s * invQ; - GLfloat dtdy2 = (t + dtdy) / (q + dqdy) - t * invQ; - GLfloat maxU, maxV, rho, lambda; - dsdx2 = FABSF(dsdx2); - dsdy2 = FABSF(dsdy2); - dtdx2 = FABSF(dtdx2); - dtdy2 = FABSF(dtdy2); - maxU = MAX2(dsdx2, dsdy2) * texW; - maxV = MAX2(dtdx2, dtdy2) * texH; - rho = MAX2(maxU, maxV); - lambda = LOG2(rho); - return lambda; -} -#endif - - -/** - * Fill in the span.array->attrib[FRAG_ATTRIB_TEXn] arrays from the - * using the attrStart/Step values. - * - * This function only used during fixed-function fragment processing. - * - * Note: in the places where we divide by Q (or mult by invQ) we're - * really doing two things: perspective correction and texcoord - * projection. Remember, for texcoord (s,t,r,q) we need to index - * texels with (s/q, t/q, r/q). - */ -static void -interpolate_texcoords(GLcontext *ctx, SWspan *span) -{ - const GLuint maxUnit - = (ctx->Texture._EnabledCoordUnits > 1) ? ctx->Const.MaxTextureUnits : 1; - GLuint u; - - /* XXX CoordUnits vs. ImageUnits */ - for (u = 0; u < maxUnit; u++) { - if (ctx->Texture._EnabledCoordUnits & (1 << u)) { - const GLuint attr = FRAG_ATTRIB_TEX0 + u; - const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current; - GLfloat texW, texH; - GLboolean needLambda; - GLfloat (*texcoord)[4] = span->array->attribs[attr]; - GLfloat *lambda = span->array->lambda[u]; - const GLfloat dsdx = span->attrStepX[attr][0]; - const GLfloat dsdy = span->attrStepY[attr][0]; - const GLfloat dtdx = span->attrStepX[attr][1]; - const GLfloat dtdy = span->attrStepY[attr][1]; - const GLfloat drdx = span->attrStepX[attr][2]; - const GLfloat dqdx = span->attrStepX[attr][3]; - const GLfloat dqdy = span->attrStepY[attr][3]; - GLfloat s = span->attrStart[attr][0] + span->leftClip * dsdx; - GLfloat t = span->attrStart[attr][1] + span->leftClip * dtdx; - GLfloat r = span->attrStart[attr][2] + span->leftClip * drdx; - GLfloat q = span->attrStart[attr][3] + span->leftClip * dqdx; - - if (obj) { - const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel]; - needLambda = (obj->MinFilter != obj->MagFilter) - || ctx->FragmentProgram._Current; - texW = img->WidthScale; - texH = img->HeightScale; - } - else { - /* using a fragment program */ - texW = 1.0; - texH = 1.0; - needLambda = GL_FALSE; - } - - if (needLambda) { - GLuint i; - if (ctx->FragmentProgram._Current - || ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dwdx; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invW); - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; - } - } - else { - for (i = 0; i < span->end; i++) { - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invQ); - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - } - } - span->arrayMask |= SPAN_LAMBDA; - } - else { - GLuint i; - if (ctx->FragmentProgram._Current || - ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dwdx; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; - } - } - else if (dqdx == 0.0F) { - /* Ortho projection or polygon's parallel to window X axis */ - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - for (i = 0; i < span->end; i++) { - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - } - } - else { - for (i = 0; i < span->end; i++) { - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - } - } - } /* lambda */ - } /* if */ - } /* for */ -} - - -/** - * Fill in the arrays->attribs[FRAG_ATTRIB_WPOS] array. - */ -static INLINE void -interpolate_wpos(GLcontext *ctx, SWspan *span) -{ - GLfloat (*wpos)[4] = span->array->attribs[FRAG_ATTRIB_WPOS]; - GLuint i; - const GLfloat zScale = 1.0F / ctx->DrawBuffer->_DepthMaxF; - GLfloat w, dw; - - if (span->arrayMask & SPAN_XY) { - for (i = 0; i < span->end; i++) { - wpos[i][0] = (GLfloat) span->array->x[i]; - wpos[i][1] = (GLfloat) span->array->y[i]; - } - } - else { - for (i = 0; i < span->end; i++) { - wpos[i][0] = (GLfloat) span->x + i; - wpos[i][1] = (GLfloat) span->y; - } - } - - dw = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dw; - for (i = 0; i < span->end; i++) { - wpos[i][2] = (GLfloat) span->array->z[i] * zScale; - wpos[i][3] = w; - w += dw; - } -} - - -/** - * Apply the current polygon stipple pattern to a span of pixels. - */ -static INLINE void -stipple_polygon_span(GLcontext *ctx, SWspan *span) -{ - GLubyte *mask = span->array->mask; - - ASSERT(ctx->Polygon.StippleFlag); - - if (span->arrayMask & SPAN_XY) { - /* arrays of x/y pixel coords */ - GLuint i; - for (i = 0; i < span->end; i++) { - const GLint col = span->array->x[i] % 32; - const GLint row = span->array->y[i] % 32; - const GLuint stipple = ctx->PolygonStipple[row]; - if (((1 << col) & stipple) == 0) { - mask[i] = 0; - } - } - } - else { - /* horizontal span of pixels */ - const GLuint highBit = 1 << 31; - const GLuint stipple = ctx->PolygonStipple[span->y % 32]; - GLuint i, m = highBit >> (GLuint) (span->x % 32); - for (i = 0; i < span->end; i++) { - if ((m & stipple) == 0) { - mask[i] = 0; - } - m = m >> 1; - if (m == 0) { - m = highBit; - } - } - } - span->writeAll = GL_FALSE; -} - - -/** - * Clip a pixel span to the current buffer/window boundaries: - * DrawBuffer->_Xmin, _Xmax, _Ymin, _Ymax. This will accomplish - * window clipping and scissoring. - * Return: GL_TRUE some pixels still visible - * GL_FALSE nothing visible - */ -static INLINE GLuint -clip_span( GLcontext *ctx, SWspan *span ) -{ - const GLint xmin = ctx->DrawBuffer->_Xmin; - const GLint xmax = ctx->DrawBuffer->_Xmax; - const GLint ymin = ctx->DrawBuffer->_Ymin; - const GLint ymax = ctx->DrawBuffer->_Ymax; - - span->leftClip = 0; - - if (span->arrayMask & SPAN_XY) { - /* arrays of x/y pixel coords */ - const GLint *x = span->array->x; - const GLint *y = span->array->y; - const GLint n = span->end; - GLubyte *mask = span->array->mask; - GLint i; - if (span->arrayMask & SPAN_MASK) { - /* note: using & intead of && to reduce branches */ - for (i = 0; i < n; i++) { - mask[i] &= (x[i] >= xmin) & (x[i] < xmax) - & (y[i] >= ymin) & (y[i] < ymax); - } - } - else { - /* note: using & intead of && to reduce branches */ - for (i = 0; i < n; i++) { - mask[i] = (x[i] >= xmin) & (x[i] < xmax) - & (y[i] >= ymin) & (y[i] < ymax); - } - } - return GL_TRUE; /* some pixels visible */ - } - else { - /* horizontal span of pixels */ - const GLint x = span->x; - const GLint y = span->y; - GLint n = span->end; - - /* Trivial rejection tests */ - if (y < ymin || y >= ymax || x + n <= xmin || x >= xmax) { - span->end = 0; - return GL_FALSE; /* all pixels clipped */ - } - - /* Clip to right */ - if (x + n > xmax) { - ASSERT(x < xmax); - n = span->end = xmax - x; - } - - /* Clip to the left */ - if (x < xmin) { - const GLint leftClip = xmin - x; - GLuint i; - - ASSERT(leftClip > 0); - ASSERT(x + n > xmin); - - /* Clip 'leftClip' pixels from the left side. - * The span->leftClip field will be applied when we interpolate - * fragment attributes. - * For arrays of values, shift them left. - */ - for (i = 0; i < FRAG_ATTRIB_MAX; i++) { - if (span->interpMask & (1 << i)) { - GLuint j; - for (j = 0; j < 4; j++) { - span->attrStart[i][j] += leftClip * span->attrStepX[i][j]; - } - } - } - - span->red += leftClip * span->redStep; - span->green += leftClip * span->greenStep; - span->blue += leftClip * span->blueStep; - span->alpha += leftClip * span->alphaStep; - span->index += leftClip * span->indexStep; - span->z += leftClip * span->zStep; - span->intTex[0] += leftClip * span->intTexStep[0]; - span->intTex[1] += leftClip * span->intTexStep[1]; - -#define SHIFT_ARRAY(ARRAY, SHIFT, LEN) \ - memcpy(ARRAY, ARRAY + (SHIFT), (LEN) * sizeof(ARRAY[0])) - - for (i = 0; i < FRAG_ATTRIB_MAX; i++) { - if (span->arrayAttribs & (1 << i)) { - /* shift array elements left by 'leftClip' */ - SHIFT_ARRAY(span->array->attribs[i], leftClip, n - leftClip); - } - } - - SHIFT_ARRAY(span->array->mask, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->rgba8, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->rgba16, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->x, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->y, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->z, leftClip, n - leftClip); - SHIFT_ARRAY(span->array->index, leftClip, n - leftClip); - for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) { - SHIFT_ARRAY(span->array->lambda[i], leftClip, n - leftClip); - } - SHIFT_ARRAY(span->array->coverage, leftClip, n - leftClip); - -#undef SHIFT_ARRAY - - span->leftClip = leftClip; - span->x = xmin; - span->end -= leftClip; - span->writeAll = GL_FALSE; - } - - ASSERT(span->x >= xmin); - ASSERT(span->x + span->end <= xmax); - ASSERT(span->y >= ymin); - ASSERT(span->y < ymax); - - return GL_TRUE; /* some pixels visible */ - } -} - - -/** - * Add specular colors to primary colors. - * Only called during fixed-function operation. - * Result is float color array (FRAG_ATTRIB_COL0). - */ -static INLINE void -add_specular(GLcontext *ctx, SWspan *span) -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLubyte *mask = span->array->mask; - GLfloat (*col0)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - GLfloat (*col1)[4] = span->array->attribs[FRAG_ATTRIB_COL1]; - GLuint i; - - ASSERT(!ctx->FragmentProgram._Current); - ASSERT(span->arrayMask & SPAN_RGBA); - ASSERT(swrast->_ActiveAttribMask & FRAG_BIT_COL1); - (void) swrast; /* silence warning */ - - if (span->array->ChanType == GL_FLOAT) { - if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) { - interpolate_active_attribs(ctx, span, FRAG_BIT_COL0); - } - } - else { - /* need float colors */ - if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) { - interpolate_float_colors(span); - } - } - - if ((span->arrayAttribs & FRAG_BIT_COL1) == 0) { - /* XXX could avoid this and interpolate COL1 in the loop below */ - interpolate_active_attribs(ctx, span, FRAG_BIT_COL1); - } - - ASSERT(span->arrayAttribs & FRAG_BIT_COL0); - ASSERT(span->arrayAttribs & FRAG_BIT_COL1); - - for (i = 0; i < span->end; i++) { - if (mask[i]) { - col0[i][0] += col1[i][0]; - col0[i][1] += col1[i][1]; - col0[i][2] += col1[i][2]; - } - } - - span->array->ChanType = GL_FLOAT; -} - - -/** - * Apply antialiasing coverage value to alpha values. - */ -static INLINE void -apply_aa_coverage(SWspan *span) -{ - const GLfloat *coverage = span->array->coverage; - GLuint i; - if (span->array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte (*rgba)[4] = span->array->rgba8; - for (i = 0; i < span->end; i++) { - const GLfloat a = rgba[i][ACOMP] * coverage[i]; - rgba[i][ACOMP] = (GLubyte) CLAMP(a, 0.0, 255.0); - ASSERT(coverage[i] >= 0.0); - ASSERT(coverage[i] <= 1.0); - } - } - else if (span->array->ChanType == GL_UNSIGNED_SHORT) { - GLushort (*rgba)[4] = span->array->rgba16; - for (i = 0; i < span->end; i++) { - const GLfloat a = rgba[i][ACOMP] * coverage[i]; - rgba[i][ACOMP] = (GLushort) CLAMP(a, 0.0, 65535.0); - } - } - else { - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - for (i = 0; i < span->end; i++) { - rgba[i][ACOMP] = rgba[i][ACOMP] * coverage[i]; - /* clamp later */ - } - } -} - - -/** - * Clamp span's float colors to [0,1] - */ -static INLINE void -clamp_colors(SWspan *span) -{ - GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0]; - GLuint i; - ASSERT(span->array->ChanType == GL_FLOAT); - for (i = 0; i < span->end; i++) { - rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F); - rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F); - rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F); - rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F); - } -} - - -/** - * Convert the span's color arrays to the given type. - * The only way 'output' can be greater than zero is when we have a fragment - * program that writes to gl_FragData[1] or higher. - * \param output which fragment program color output is being processed - */ -static INLINE void -convert_color_type(SWspan *span, GLenum newType, GLuint output) -{ - GLvoid *src, *dst; - - if (output > 0 || span->array->ChanType == GL_FLOAT) { - src = span->array->attribs[FRAG_ATTRIB_COL0 + output]; - span->array->ChanType = GL_FLOAT; - } - else if (span->array->ChanType == GL_UNSIGNED_BYTE) { - src = span->array->rgba8; - } - else { - ASSERT(span->array->ChanType == GL_UNSIGNED_SHORT); - src = span->array->rgba16; - } - - if (newType == GL_UNSIGNED_BYTE) { - dst = span->array->rgba8; - } - else if (newType == GL_UNSIGNED_SHORT) { - dst = span->array->rgba16; - } - else { - dst = span->array->attribs[FRAG_ATTRIB_COL0]; - } - - _mesa_convert_colors(span->array->ChanType, src, - newType, dst, - span->end, span->array->mask); - - span->array->ChanType = newType; - span->array->rgba = dst; -} - - - -/** - * Apply fragment shader, fragment program or normal texturing to span. - */ -static INLINE void -shade_texture_span(GLcontext *ctx, SWspan *span) -{ - GLbitfield inputsRead; - - /* Determine which fragment attributes are actually needed */ - if (ctx->FragmentProgram._Current) { - inputsRead = ctx->FragmentProgram._Current->Base.InputsRead; - } - else { - /* XXX we could be a bit smarter about this */ - inputsRead = ~0; - } - - if (ctx->FragmentProgram._Current || - ctx->ATIFragmentShader._Enabled) { - /* programmable shading */ - if (span->primitive == GL_BITMAP && span->array->ChanType != GL_FLOAT) { - convert_color_type(span, GL_FLOAT, 0); - } - else { - span->array->rgba = (void *) span->array->attribs[FRAG_ATTRIB_COL0]; - } - - if (span->primitive != GL_POINT || - (span->interpMask & SPAN_RGBA) || - ctx->Point.PointSprite) { - /* for single-pixel points, we populated the arrays already */ - interpolate_active_attribs(ctx, span, ~0); - } - span->array->ChanType = GL_FLOAT; - - if (!(span->arrayMask & SPAN_Z)) - _swrast_span_interpolate_z (ctx, span); - -#if 0 - if (inputsRead & FRAG_BIT_WPOS) -#else - /* XXX always interpolate wpos so that DDX/DDY work */ -#endif - interpolate_wpos(ctx, span); - - /* Run fragment program/shader now */ - if (ctx->FragmentProgram._Current) { - _swrast_exec_fragment_program(ctx, span); - } - else { - ASSERT(ctx->ATIFragmentShader._Enabled); - _swrast_exec_fragment_shader(ctx, span); - } - } - else if (ctx->Texture._EnabledCoordUnits) { - /* conventional texturing */ - -#if CHAN_BITS == 32 - if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) { - interpolate_int_colors(ctx, span); - } -#else - if (!(span->arrayMask & SPAN_RGBA)) - interpolate_int_colors(ctx, span); -#endif - if ((span->arrayAttribs & FRAG_BITS_TEX_ANY) == 0x0) - interpolate_texcoords(ctx, span); - - _swrast_texture_span(ctx, span); - } -} - - - -/** - * Apply all the per-fragment operations to a span. - * This now includes texturing (_swrast_write_texture_span() is history). - * This function may modify any of the array values in the span. - * span->interpMask and span->arrayMask may be changed but will be restored - * to their original values before returning. - */ -void -_swrast_write_rgba_span( GLcontext *ctx, SWspan *span) -{ - const SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLuint *colorMask = (GLuint *) ctx->Color.ColorMask; - const GLbitfield origInterpMask = span->interpMask; - const GLbitfield origArrayMask = span->arrayMask; - const GLbitfield origArrayAttribs = span->arrayAttribs; - const GLenum origChanType = span->array->ChanType; - void * const origRgba = span->array->rgba; - const GLboolean shader = (ctx->FragmentProgram._Current - || ctx->ATIFragmentShader._Enabled); - const GLboolean shaderOrTexture = shader || ctx->Texture._EnabledCoordUnits; - struct gl_framebuffer *fb = ctx->DrawBuffer; - - /* - printf("%s() interp 0x%x array 0x%x\n", __FUNCTION__, - span->interpMask, span->arrayMask); - */ - - ASSERT(span->primitive == GL_POINT || - span->primitive == GL_LINE || - span->primitive == GL_POLYGON || - span->primitive == GL_BITMAP); - - /* Fragment write masks */ - if (span->arrayMask & SPAN_MASK) { - /* mask was initialized by caller, probably glBitmap */ - span->writeAll = GL_FALSE; - } - else { - memset(span->array->mask, 1, span->end); - span->writeAll = GL_TRUE; - } - - /* Clip to window/scissor box */ - if (!clip_span(ctx, span)) { - return; - } - - ASSERT(span->end <= MAX_WIDTH); - - /* Depth bounds test */ - if (ctx->Depth.BoundsTest && fb->Visual.depthBits > 0) { - if (!_swrast_depth_bounds_test(ctx, span)) { - return; - } - } - -#ifdef DEBUG - /* Make sure all fragments are within window bounds */ - if (span->arrayMask & SPAN_XY) { - /* array of pixel locations */ - GLuint i; - for (i = 0; i < span->end; i++) { - if (span->array->mask[i]) { - assert(span->array->x[i] >= fb->_Xmin); - assert(span->array->x[i] < fb->_Xmax); - assert(span->array->y[i] >= fb->_Ymin); - assert(span->array->y[i] < fb->_Ymax); - } - } - } -#endif - - /* Polygon Stippling */ - if (ctx->Polygon.StippleFlag && span->primitive == GL_POLYGON) { - stipple_polygon_span(ctx, span); - } - - /* This is the normal place to compute the fragment color/Z - * from texturing or shading. - */ - if (shaderOrTexture && !swrast->_DeferredTexture) { - shade_texture_span(ctx, span); - } - - /* Do the alpha test */ - if (ctx->Color.AlphaEnabled) { - if (!_swrast_alpha_test(ctx, span)) { - /* all fragments failed test */ - goto end; - } - } - - /* Stencil and Z testing */ - if (ctx->Stencil._Enabled || ctx->Depth.Test) { - if (!(span->arrayMask & SPAN_Z)) - _swrast_span_interpolate_z(ctx, span); - - if (ctx->Transform.DepthClamp) - _swrast_depth_clamp_span(ctx, span); - - if (ctx->Stencil._Enabled) { - /* Combined Z/stencil tests */ - if (!_swrast_stencil_and_ztest_span(ctx, span)) { - /* all fragments failed test */ - goto end; - } - } - else if (fb->Visual.depthBits > 0) { - /* Just regular depth testing */ - ASSERT(ctx->Depth.Test); - ASSERT(span->arrayMask & SPAN_Z); - if (!_swrast_depth_test_span(ctx, span)) { - /* all fragments failed test */ - goto end; - } - } - } - - if (ctx->Query.CurrentOcclusionObject) { - /* update count of 'passed' fragments */ - struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; - GLuint i; - for (i = 0; i < span->end; i++) - q->Result += span->array->mask[i]; - } - - /* We had to wait until now to check for glColorMask(0,0,0,0) because of - * the occlusion test. - */ - if (fb->_NumColorDrawBuffers == 1 && colorMask[0] == 0x0) { - /* no colors to write */ - goto end; - } - - /* If we were able to defer fragment color computation to now, there's - * a good chance that many fragments will have already been killed by - * Z/stencil testing. - */ - if (shaderOrTexture && swrast->_DeferredTexture) { - shade_texture_span(ctx, span); - } - -#if CHAN_BITS == 32 - if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) { - interpolate_active_attribs(ctx, span, FRAG_BIT_COL0); - } -#else - if ((span->arrayMask & SPAN_RGBA) == 0) { - interpolate_int_colors(ctx, span); - } -#endif - - ASSERT(span->arrayMask & SPAN_RGBA); - - if (span->primitive == GL_BITMAP || !swrast->SpecularVertexAdd) { - /* Add primary and specular (diffuse + specular) colors */ - if (!shader) { - if (ctx->Fog.ColorSumEnabled || - (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) { - add_specular(ctx, span); - } - } - } - - /* Fog */ - if (swrast->_FogEnabled) { - _swrast_fog_rgba_span(ctx, span); - } - - /* Antialias coverage application */ - if (span->arrayMask & SPAN_COVERAGE) { - apply_aa_coverage(span); - } - - /* Clamp color/alpha values over the range [0.0, 1.0] before storage */ - if (ctx->Color.ClampFragmentColor == GL_TRUE && - span->array->ChanType == GL_FLOAT) { - clamp_colors(span); - } - - /* - * Write to renderbuffers. - * Depending on glDrawBuffer() state and the which color outputs are - * written by the fragment shader, we may either replicate one color to - * all renderbuffers or write a different color to each renderbuffer. - * multiFragOutputs=TRUE for the later case. - */ - { - const GLuint numBuffers = fb->_NumColorDrawBuffers; - const struct gl_fragment_program *fp = ctx->FragmentProgram._Current; - const GLboolean multiFragOutputs = - (fp && fp->Base.OutputsWritten >= (1 << FRAG_RESULT_DATA0)); - GLuint buf; - - for (buf = 0; buf < numBuffers; buf++) { - struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buf]; - - /* color[fragOutput] will be written to buffer[buf] */ - - if (rb) { - GLchan rgbaSave[MAX_WIDTH][4]; - const GLuint fragOutput = multiFragOutputs ? buf : 0; - - /* set span->array->rgba to colors for render buffer's datatype */ - if (rb->DataType != span->array->ChanType || fragOutput > 0) { - convert_color_type(span, rb->DataType, fragOutput); - } - else { - if (rb->DataType == GL_UNSIGNED_BYTE) { - span->array->rgba = span->array->rgba8; - } - else if (rb->DataType == GL_UNSIGNED_SHORT) { - span->array->rgba = (void *) span->array->rgba16; - } - else { - span->array->rgba = (void *) - span->array->attribs[FRAG_ATTRIB_COL0]; - } - } - - if (!multiFragOutputs && numBuffers > 1) { - /* save colors for second, third renderbuffer writes */ - memcpy(rgbaSave, span->array->rgba, - 4 * span->end * sizeof(GLchan)); - } - - ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB || - rb->_BaseFormat == GL_ALPHA); - - if (ctx->Color._LogicOpEnabled) { - _swrast_logicop_rgba_span(ctx, rb, span); - } - else if ((ctx->Color.BlendEnabled >> buf) & 1) { - _swrast_blend_span(ctx, rb, span); - } - - if (colorMask[buf] != 0xffffffff) { - _swrast_mask_rgba_span(ctx, rb, span, buf); - } - - if (span->arrayMask & SPAN_XY) { - /* array of pixel coords */ - ASSERT(rb->PutValues); - rb->PutValues(ctx, rb, span->end, - span->array->x, span->array->y, - span->array->rgba, span->array->mask); - } - else { - /* horizontal run of pixels */ - ASSERT(rb->PutRow); - rb->PutRow(ctx, rb, span->end, span->x, span->y, - span->array->rgba, - span->writeAll ? NULL: span->array->mask); - } - - if (!multiFragOutputs && numBuffers > 1) { - /* restore original span values */ - memcpy(span->array->rgba, rgbaSave, - 4 * span->end * sizeof(GLchan)); - } - - } /* if rb */ - } /* for buf */ - } - -end: - /* restore these values before returning */ - span->interpMask = origInterpMask; - span->arrayMask = origArrayMask; - span->arrayAttribs = origArrayAttribs; - span->array->ChanType = origChanType; - span->array->rgba = origRgba; -} - - -/** - * Read RGBA pixels from a renderbuffer. Clipping will be done to prevent - * reading ouside the buffer's boundaries. - * \param dstType datatype for returned colors - * \param rgba the returned colors - */ -void -_swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint n, GLint x, GLint y, GLenum dstType, - GLvoid *rgba) -{ - const GLint bufWidth = (GLint) rb->Width; - const GLint bufHeight = (GLint) rb->Height; - - if (y < 0 || y >= bufHeight || x + (GLint) n < 0 || x >= bufWidth) { - /* completely above, below, or right */ - /* XXX maybe leave rgba values undefined? */ - memset(rgba, 0, 4 * n * sizeof(GLchan)); - } - else { - GLint skip, length; - if (x < 0) { - /* left edge clipping */ - skip = -x; - length = (GLint) n - skip; - if (length < 0) { - /* completely left of window */ - return; - } - if (length > bufWidth) { - length = bufWidth; - } - } - else if ((GLint) (x + n) > bufWidth) { - /* right edge clipping */ - skip = 0; - length = bufWidth - x; - if (length < 0) { - /* completely to right of window */ - return; - } - } - else { - /* no clipping */ - skip = 0; - length = (GLint) n; - } - - ASSERT(rb); - ASSERT(rb->GetRow); - ASSERT(rb->_BaseFormat == GL_RGB || rb->_BaseFormat == GL_RGBA || - rb->_BaseFormat == GL_ALPHA); - - if (rb->DataType == dstType) { - rb->GetRow(ctx, rb, length, x + skip, y, - (GLubyte *) rgba + skip * RGBA_PIXEL_SIZE(rb->DataType)); - } - else { - GLuint temp[MAX_WIDTH * 4]; - rb->GetRow(ctx, rb, length, x + skip, y, temp); - _mesa_convert_colors(rb->DataType, temp, - dstType, (GLubyte *) rgba + skip * RGBA_PIXEL_SIZE(dstType), - length, NULL); - } - } -} - - -/** - * Wrapper for gl_renderbuffer::GetValues() which does clipping to avoid - * reading values outside the buffer bounds. - * We can use this for reading any format/type of renderbuffer. - * \param valueSize is the size in bytes of each value (pixel) put into the - * values array. - */ -void -_swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values, GLuint valueSize) -{ - GLuint i, inCount = 0, inStart = 0; - - for (i = 0; i < count; i++) { - if (x[i] >= 0 && y[i] >= 0 && - x[i] < (GLint) rb->Width && y[i] < (GLint) rb->Height) { - /* inside */ - if (inCount == 0) - inStart = i; - inCount++; - } - else { - if (inCount > 0) { - /* read [inStart, inStart + inCount) */ - rb->GetValues(ctx, rb, inCount, x + inStart, y + inStart, - (GLubyte *) values + inStart * valueSize); - inCount = 0; - } - } - } - if (inCount > 0) { - /* read last values */ - rb->GetValues(ctx, rb, inCount, x + inStart, y + inStart, - (GLubyte *) values + inStart * valueSize); - } -} - - -/** - * Wrapper for gl_renderbuffer::PutRow() which does clipping. - * \param valueSize size of each value (pixel) in bytes - */ -void -_swrast_put_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const GLvoid *values, GLuint valueSize) -{ - GLint skip = 0; - - if (y < 0 || y >= (GLint) rb->Height) - return; /* above or below */ - - if (x + (GLint) count <= 0 || x >= (GLint) rb->Width) - return; /* entirely left or right */ - - if ((GLint) (x + count) > (GLint) rb->Width) { - /* right clip */ - GLint clip = x + count - rb->Width; - count -= clip; - } - - if (x < 0) { - /* left clip */ - skip = -x; - x = 0; - count -= skip; - } - - rb->PutRow(ctx, rb, count, x, y, - (const GLubyte *) values + skip * valueSize, NULL); -} - - -/** - * Wrapper for gl_renderbuffer::GetRow() which does clipping. - * \param valueSize size of each value (pixel) in bytes - */ -void -_swrast_get_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - GLvoid *values, GLuint valueSize) -{ - GLint skip = 0; - - if (y < 0 || y >= (GLint) rb->Height) - return; /* above or below */ - - if (x + (GLint) count <= 0 || x >= (GLint) rb->Width) - return; /* entirely left or right */ - - if (x + count > rb->Width) { - /* right clip */ - GLint clip = x + count - rb->Width; - count -= clip; - } - - if (x < 0) { - /* left clip */ - skip = -x; - x = 0; - count -= skip; - } - - rb->GetRow(ctx, rb, count, x, y, (GLubyte *) values + skip * valueSize); -} - - -/** - * Get RGBA pixels from the given renderbuffer. - * Used by blending, logicop and masking functions. - * \return pointer to the colors we read. - */ -void * -_swrast_get_dest_rgba(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span) -{ - const GLuint pixelSize = RGBA_PIXEL_SIZE(span->array->ChanType); - void *rbPixels; - - /* Point rbPixels to a temporary space */ - rbPixels = span->array->attribs[FRAG_ATTRIB_MAX - 1]; - - /* Get destination values from renderbuffer */ - if (span->arrayMask & SPAN_XY) { - _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y, - rbPixels, pixelSize); - } - else { - _swrast_get_row(ctx, rb, span->end, span->x, span->y, - rbPixels, pixelSize); - } - - return rbPixels; -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file swrast/s_span.c
+ * \brief Span processing functions used by all rasterization functions.
+ * This is where all the per-fragment tests are performed
+ * \author Brian Paul
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/image.h"
+
+#include "s_atifragshader.h"
+#include "s_alpha.h"
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_fog.h"
+#include "s_logic.h"
+#include "s_masking.h"
+#include "s_fragprog.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_texcombine.h"
+
+
+/**
+ * Set default fragment attributes for the span using the
+ * current raster values. Used prior to glDraw/CopyPixels
+ * and glBitmap.
+ */
+void
+_swrast_span_default_attribs(struct gl_context *ctx, SWspan *span)
+{
+ GLchan r, g, b, a;
+ /* Z*/
+ {
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+ if (ctx->DrawBuffer->Visual.depthBits <= 16)
+ span->z = FloatToFixed(ctx->Current.RasterPos[2] * depthMax + 0.5F);
+ else {
+ GLfloat tmpf = ctx->Current.RasterPos[2] * depthMax;
+ tmpf = MIN2(tmpf, depthMax);
+ span->z = (GLint)tmpf;
+ }
+ span->zStep = 0;
+ span->interpMask |= SPAN_Z;
+ }
+
+ /* W (for perspective correction) */
+ span->attrStart[FRAG_ATTRIB_WPOS][3] = 1.0;
+ span->attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0;
+ span->attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0;
+
+ /* primary color, or color index */
+ UNCLAMPED_FLOAT_TO_CHAN(r, ctx->Current.RasterColor[0]);
+ UNCLAMPED_FLOAT_TO_CHAN(g, ctx->Current.RasterColor[1]);
+ UNCLAMPED_FLOAT_TO_CHAN(b, ctx->Current.RasterColor[2]);
+ UNCLAMPED_FLOAT_TO_CHAN(a, ctx->Current.RasterColor[3]);
+#if CHAN_TYPE == GL_FLOAT
+ span->red = r;
+ span->green = g;
+ span->blue = b;
+ span->alpha = a;
+#else
+ span->red = IntToFixed(r);
+ span->green = IntToFixed(g);
+ span->blue = IntToFixed(b);
+ span->alpha = IntToFixed(a);
+#endif
+ span->redStep = 0;
+ span->greenStep = 0;
+ span->blueStep = 0;
+ span->alphaStep = 0;
+ span->interpMask |= SPAN_RGBA;
+
+ COPY_4V(span->attrStart[FRAG_ATTRIB_COL0], ctx->Current.RasterColor);
+ ASSIGN_4V(span->attrStepX[FRAG_ATTRIB_COL0], 0.0, 0.0, 0.0, 0.0);
+ ASSIGN_4V(span->attrStepY[FRAG_ATTRIB_COL0], 0.0, 0.0, 0.0, 0.0);
+
+ /* Secondary color */
+ if (ctx->Light.Enabled || ctx->Fog.ColorSumEnabled)
+ {
+ COPY_4V(span->attrStart[FRAG_ATTRIB_COL1], ctx->Current.RasterSecondaryColor);
+ ASSIGN_4V(span->attrStepX[FRAG_ATTRIB_COL1], 0.0, 0.0, 0.0, 0.0);
+ ASSIGN_4V(span->attrStepY[FRAG_ATTRIB_COL1], 0.0, 0.0, 0.0, 0.0);
+ }
+
+ /* fog */
+ {
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat fogVal; /* a coord or a blend factor */
+ if (swrast->_PreferPixelFog) {
+ /* fog blend factors will be computed from fog coordinates per pixel */
+ fogVal = ctx->Current.RasterDistance;
+ }
+ else {
+ /* fog blend factor should be computed from fogcoord now */
+ fogVal = _swrast_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
+ }
+ span->attrStart[FRAG_ATTRIB_FOGC][0] = fogVal;
+ span->attrStepX[FRAG_ATTRIB_FOGC][0] = 0.0;
+ span->attrStepY[FRAG_ATTRIB_FOGC][0] = 0.0;
+ }
+
+ /* texcoords */
+ {
+ GLuint i;
+ for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
+ const GLuint attr = FRAG_ATTRIB_TEX0 + i;
+ const GLfloat *tc = ctx->Current.RasterTexCoords[i];
+ if (ctx->FragmentProgram._Current || ctx->ATIFragmentShader._Enabled) {
+ COPY_4V(span->attrStart[attr], tc);
+ }
+ else if (tc[3] > 0.0F) {
+ /* use (s/q, t/q, r/q, 1) */
+ span->attrStart[attr][0] = tc[0] / tc[3];
+ span->attrStart[attr][1] = tc[1] / tc[3];
+ span->attrStart[attr][2] = tc[2] / tc[3];
+ span->attrStart[attr][3] = 1.0;
+ }
+ else {
+ ASSIGN_4V(span->attrStart[attr], 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+ ASSIGN_4V(span->attrStepX[attr], 0.0F, 0.0F, 0.0F, 0.0F);
+ ASSIGN_4V(span->attrStepY[attr], 0.0F, 0.0F, 0.0F, 0.0F);
+ }
+ }
+}
+
+
+/**
+ * Interpolate the active attributes (and'd with attrMask) to
+ * fill in span->array->attribs[].
+ * Perspective correction will be done. The point/line/triangle function
+ * should have computed attrStart/Step values for FRAG_ATTRIB_WPOS[3]!
+ */
+static INLINE void
+interpolate_active_attribs(struct gl_context *ctx, SWspan *span, GLbitfield attrMask)
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /*
+ * Don't overwrite existing array values, such as colors that may have
+ * been produced by glDraw/CopyPixels.
+ */
+ attrMask &= ~span->arrayAttribs;
+
+ ATTRIB_LOOP_BEGIN
+ if (attrMask & (1 << attr)) {
+ const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3];
+ GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3];
+ const GLfloat dv0dx = span->attrStepX[attr][0];
+ const GLfloat dv1dx = span->attrStepX[attr][1];
+ const GLfloat dv2dx = span->attrStepX[attr][2];
+ const GLfloat dv3dx = span->attrStepX[attr][3];
+ GLfloat v0 = span->attrStart[attr][0] + span->leftClip * dv0dx;
+ GLfloat v1 = span->attrStart[attr][1] + span->leftClip * dv1dx;
+ GLfloat v2 = span->attrStart[attr][2] + span->leftClip * dv2dx;
+ GLfloat v3 = span->attrStart[attr][3] + span->leftClip * dv3dx;
+ GLuint k;
+ for (k = 0; k < span->end; k++) {
+ const GLfloat invW = 1.0f / w;
+ span->array->attribs[attr][k][0] = v0 * invW;
+ span->array->attribs[attr][k][1] = v1 * invW;
+ span->array->attribs[attr][k][2] = v2 * invW;
+ span->array->attribs[attr][k][3] = v3 * invW;
+ v0 += dv0dx;
+ v1 += dv1dx;
+ v2 += dv2dx;
+ v3 += dv3dx;
+ w += dwdx;
+ }
+ ASSERT((span->arrayAttribs & (1 << attr)) == 0);
+ span->arrayAttribs |= (1 << attr);
+ }
+ ATTRIB_LOOP_END
+}
+
+
+/**
+ * Interpolate primary colors to fill in the span->array->rgba8 (or rgb16)
+ * color array.
+ */
+static INLINE void
+interpolate_int_colors(struct gl_context *ctx, SWspan *span)
+{
+ const GLuint n = span->end;
+ GLuint i;
+
+#if CHAN_BITS != 32
+ ASSERT(!(span->arrayMask & SPAN_RGBA));
+#endif
+
+ switch (span->array->ChanType) {
+#if CHAN_BITS != 32
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ if (span->interpMask & SPAN_FLAT) {
+ GLubyte color[4];
+ color[RCOMP] = FixedToInt(span->red);
+ color[GCOMP] = FixedToInt(span->green);
+ color[BCOMP] = FixedToInt(span->blue);
+ color[ACOMP] = FixedToInt(span->alpha);
+ for (i = 0; i < n; i++) {
+ COPY_4UBV(rgba[i], color);
+ }
+ }
+ else {
+ GLfixed r = span->red;
+ GLfixed g = span->green;
+ GLfixed b = span->blue;
+ GLfixed a = span->alpha;
+ GLint dr = span->redStep;
+ GLint dg = span->greenStep;
+ GLint db = span->blueStep;
+ GLint da = span->alphaStep;
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = FixedToChan(r);
+ rgba[i][GCOMP] = FixedToChan(g);
+ rgba[i][BCOMP] = FixedToChan(b);
+ rgba[i][ACOMP] = FixedToChan(a);
+ r += dr;
+ g += dg;
+ b += db;
+ a += da;
+ }
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ if (span->interpMask & SPAN_FLAT) {
+ GLushort color[4];
+ color[RCOMP] = FixedToInt(span->red);
+ color[GCOMP] = FixedToInt(span->green);
+ color[BCOMP] = FixedToInt(span->blue);
+ color[ACOMP] = FixedToInt(span->alpha);
+ for (i = 0; i < n; i++) {
+ COPY_4V(rgba[i], color);
+ }
+ }
+ else {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ GLfixed r, g, b, a;
+ GLint dr, dg, db, da;
+ r = span->red;
+ g = span->green;
+ b = span->blue;
+ a = span->alpha;
+ dr = span->redStep;
+ dg = span->greenStep;
+ db = span->blueStep;
+ da = span->alphaStep;
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = FixedToChan(r);
+ rgba[i][GCOMP] = FixedToChan(g);
+ rgba[i][BCOMP] = FixedToChan(b);
+ rgba[i][ACOMP] = FixedToChan(a);
+ r += dr;
+ g += dg;
+ b += db;
+ a += da;
+ }
+ }
+ }
+ break;
+#endif
+ case GL_FLOAT:
+ interpolate_active_attribs(ctx, span, FRAG_BIT_COL0);
+ break;
+ default:
+ _mesa_problem(NULL, "bad datatype in interpolate_int_colors");
+ }
+ span->arrayMask |= SPAN_RGBA;
+}
+
+
+/**
+ * Populate the FRAG_ATTRIB_COL0 array.
+ */
+static INLINE void
+interpolate_float_colors(SWspan *span)
+{
+ GLfloat (*col0)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ const GLuint n = span->end;
+ GLuint i;
+
+ assert(!(span->arrayAttribs & FRAG_BIT_COL0));
+
+ if (span->arrayMask & SPAN_RGBA) {
+ /* convert array of int colors */
+ for (i = 0; i < n; i++) {
+ col0[i][0] = UBYTE_TO_FLOAT(span->array->rgba8[i][0]);
+ col0[i][1] = UBYTE_TO_FLOAT(span->array->rgba8[i][1]);
+ col0[i][2] = UBYTE_TO_FLOAT(span->array->rgba8[i][2]);
+ col0[i][3] = UBYTE_TO_FLOAT(span->array->rgba8[i][3]);
+ }
+ }
+ else {
+ /* interpolate red/green/blue/alpha to get float colors */
+ ASSERT(span->interpMask & SPAN_RGBA);
+ if (span->interpMask & SPAN_FLAT) {
+ GLfloat r = FixedToFloat(span->red);
+ GLfloat g = FixedToFloat(span->green);
+ GLfloat b = FixedToFloat(span->blue);
+ GLfloat a = FixedToFloat(span->alpha);
+ for (i = 0; i < n; i++) {
+ ASSIGN_4V(col0[i], r, g, b, a);
+ }
+ }
+ else {
+ GLfloat r = FixedToFloat(span->red);
+ GLfloat g = FixedToFloat(span->green);
+ GLfloat b = FixedToFloat(span->blue);
+ GLfloat a = FixedToFloat(span->alpha);
+ GLfloat dr = FixedToFloat(span->redStep);
+ GLfloat dg = FixedToFloat(span->greenStep);
+ GLfloat db = FixedToFloat(span->blueStep);
+ GLfloat da = FixedToFloat(span->alphaStep);
+ for (i = 0; i < n; i++) {
+ col0[i][0] = r;
+ col0[i][1] = g;
+ col0[i][2] = b;
+ col0[i][3] = a;
+ r += dr;
+ g += dg;
+ b += db;
+ a += da;
+ }
+ }
+ }
+
+ span->arrayAttribs |= FRAG_BIT_COL0;
+ span->array->ChanType = GL_FLOAT;
+}
+
+
+
+/**
+ * Fill in the span.zArray array from the span->z, zStep values.
+ */
+void
+_swrast_span_interpolate_z( const struct gl_context *ctx, SWspan *span )
+{
+ const GLuint n = span->end;
+ GLuint i;
+
+ ASSERT(!(span->arrayMask & SPAN_Z));
+
+ if (ctx->DrawBuffer->Visual.depthBits <= 16) {
+ GLfixed zval = span->z;
+ GLuint *z = span->array->z;
+ for (i = 0; i < n; i++) {
+ z[i] = FixedToInt(zval);
+ zval += span->zStep;
+ }
+ }
+ else {
+ /* Deep Z buffer, no fixed->int shift */
+ GLuint zval = span->z;
+ GLuint *z = span->array->z;
+ for (i = 0; i < n; i++) {
+ z[i] = zval;
+ zval += span->zStep;
+ }
+ }
+ span->interpMask &= ~SPAN_Z;
+ span->arrayMask |= SPAN_Z;
+}
+
+
+/**
+ * Compute mipmap LOD from partial derivatives.
+ * This the ideal solution, as given in the OpenGL spec.
+ */
+GLfloat
+_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
+ GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
+ GLfloat s, GLfloat t, GLfloat q, GLfloat invQ)
+{
+ GLfloat dudx = texW * ((s + dsdx) / (q + dqdx) - s * invQ);
+ GLfloat dvdx = texH * ((t + dtdx) / (q + dqdx) - t * invQ);
+ GLfloat dudy = texW * ((s + dsdy) / (q + dqdy) - s * invQ);
+ GLfloat dvdy = texH * ((t + dtdy) / (q + dqdy) - t * invQ);
+ GLfloat x = SQRTF(dudx * dudx + dvdx * dvdx);
+ GLfloat y = SQRTF(dudy * dudy + dvdy * dvdy);
+ GLfloat rho = MAX2(x, y);
+ GLfloat lambda = LOG2(rho);
+ return lambda;
+}
+
+
+/**
+ * Compute mipmap LOD from partial derivatives.
+ * This is a faster approximation than above function.
+ */
+#if 0
+GLfloat
+_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
+ GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
+ GLfloat s, GLfloat t, GLfloat q, GLfloat invQ)
+{
+ GLfloat dsdx2 = (s + dsdx) / (q + dqdx) - s * invQ;
+ GLfloat dtdx2 = (t + dtdx) / (q + dqdx) - t * invQ;
+ GLfloat dsdy2 = (s + dsdy) / (q + dqdy) - s * invQ;
+ GLfloat dtdy2 = (t + dtdy) / (q + dqdy) - t * invQ;
+ GLfloat maxU, maxV, rho, lambda;
+ dsdx2 = FABSF(dsdx2);
+ dsdy2 = FABSF(dsdy2);
+ dtdx2 = FABSF(dtdx2);
+ dtdy2 = FABSF(dtdy2);
+ maxU = MAX2(dsdx2, dsdy2) * texW;
+ maxV = MAX2(dtdx2, dtdy2) * texH;
+ rho = MAX2(maxU, maxV);
+ lambda = LOG2(rho);
+ return lambda;
+}
+#endif
+
+
+/**
+ * Fill in the span.array->attrib[FRAG_ATTRIB_TEXn] arrays from the
+ * using the attrStart/Step values.
+ *
+ * This function only used during fixed-function fragment processing.
+ *
+ * Note: in the places where we divide by Q (or mult by invQ) we're
+ * really doing two things: perspective correction and texcoord
+ * projection. Remember, for texcoord (s,t,r,q) we need to index
+ * texels with (s/q, t/q, r/q).
+ */
+static void
+interpolate_texcoords(struct gl_context *ctx, SWspan *span)
+{
+ const GLuint maxUnit
+ = (ctx->Texture._EnabledCoordUnits > 1) ? ctx->Const.MaxTextureUnits : 1;
+ GLuint u;
+
+ /* XXX CoordUnits vs. ImageUnits */
+ for (u = 0; u < maxUnit; u++) {
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
+ const GLuint attr = FRAG_ATTRIB_TEX0 + u;
+ const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current;
+ GLfloat texW, texH;
+ GLboolean needLambda;
+ GLfloat (*texcoord)[4] = span->array->attribs[attr];
+ GLfloat *lambda = span->array->lambda[u];
+ const GLfloat dsdx = span->attrStepX[attr][0];
+ const GLfloat dsdy = span->attrStepY[attr][0];
+ const GLfloat dtdx = span->attrStepX[attr][1];
+ const GLfloat dtdy = span->attrStepY[attr][1];
+ const GLfloat drdx = span->attrStepX[attr][2];
+ const GLfloat dqdx = span->attrStepX[attr][3];
+ const GLfloat dqdy = span->attrStepY[attr][3];
+ GLfloat s = span->attrStart[attr][0] + span->leftClip * dsdx;
+ GLfloat t = span->attrStart[attr][1] + span->leftClip * dtdx;
+ GLfloat r = span->attrStart[attr][2] + span->leftClip * drdx;
+ GLfloat q = span->attrStart[attr][3] + span->leftClip * dqdx;
+
+ if (obj) {
+ const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel];
+ needLambda = (obj->MinFilter != obj->MagFilter)
+ || ctx->FragmentProgram._Current;
+ texW = img->WidthScale;
+ texH = img->HeightScale;
+ }
+ else {
+ /* using a fragment program */
+ texW = 1.0;
+ texH = 1.0;
+ needLambda = GL_FALSE;
+ }
+
+ if (needLambda) {
+ GLuint i;
+ if (ctx->FragmentProgram._Current
+ || ctx->ATIFragmentShader._Enabled) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3];
+ GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dwdx;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat invW = 1.0F / w;
+ texcoord[i][0] = s * invW;
+ texcoord[i][1] = t * invW;
+ texcoord[i][2] = r * invW;
+ texcoord[i][3] = q * invW;
+ lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy,
+ dqdx, dqdy, texW, texH,
+ s, t, q, invW);
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ w += dwdx;
+ }
+ }
+ else {
+ for (i = 0; i < span->end; i++) {
+ const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q);
+ texcoord[i][0] = s * invQ;
+ texcoord[i][1] = t * invQ;
+ texcoord[i][2] = r * invQ;
+ texcoord[i][3] = q;
+ lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy,
+ dqdx, dqdy, texW, texH,
+ s, t, q, invQ);
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ }
+ }
+ span->arrayMask |= SPAN_LAMBDA;
+ }
+ else {
+ GLuint i;
+ if (ctx->FragmentProgram._Current ||
+ ctx->ATIFragmentShader._Enabled) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3];
+ GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dwdx;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat invW = 1.0F / w;
+ texcoord[i][0] = s * invW;
+ texcoord[i][1] = t * invW;
+ texcoord[i][2] = r * invW;
+ texcoord[i][3] = q * invW;
+ lambda[i] = 0.0;
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ w += dwdx;
+ }
+ }
+ else if (dqdx == 0.0F) {
+ /* Ortho projection or polygon's parallel to window X axis */
+ const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q);
+ for (i = 0; i < span->end; i++) {
+ texcoord[i][0] = s * invQ;
+ texcoord[i][1] = t * invQ;
+ texcoord[i][2] = r * invQ;
+ texcoord[i][3] = q;
+ lambda[i] = 0.0;
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ }
+ }
+ else {
+ for (i = 0; i < span->end; i++) {
+ const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q);
+ texcoord[i][0] = s * invQ;
+ texcoord[i][1] = t * invQ;
+ texcoord[i][2] = r * invQ;
+ texcoord[i][3] = q;
+ lambda[i] = 0.0;
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ }
+ }
+ } /* lambda */
+ } /* if */
+ } /* for */
+}
+
+
+/**
+ * Fill in the arrays->attribs[FRAG_ATTRIB_WPOS] array.
+ */
+static INLINE void
+interpolate_wpos(struct gl_context *ctx, SWspan *span)
+{
+ GLfloat (*wpos)[4] = span->array->attribs[FRAG_ATTRIB_WPOS];
+ GLuint i;
+ const GLfloat zScale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+ GLfloat w, dw;
+
+ if (span->arrayMask & SPAN_XY) {
+ for (i = 0; i < span->end; i++) {
+ wpos[i][0] = (GLfloat) span->array->x[i];
+ wpos[i][1] = (GLfloat) span->array->y[i];
+ }
+ }
+ else {
+ for (i = 0; i < span->end; i++) {
+ wpos[i][0] = (GLfloat) span->x + i;
+ wpos[i][1] = (GLfloat) span->y;
+ }
+ }
+
+ dw = span->attrStepX[FRAG_ATTRIB_WPOS][3];
+ w = span->attrStart[FRAG_ATTRIB_WPOS][3] + span->leftClip * dw;
+ for (i = 0; i < span->end; i++) {
+ wpos[i][2] = (GLfloat) span->array->z[i] * zScale;
+ wpos[i][3] = w;
+ w += dw;
+ }
+}
+
+
+/**
+ * Apply the current polygon stipple pattern to a span of pixels.
+ */
+static INLINE void
+stipple_polygon_span(struct gl_context *ctx, SWspan *span)
+{
+ GLubyte *mask = span->array->mask;
+
+ ASSERT(ctx->Polygon.StippleFlag);
+
+ if (span->arrayMask & SPAN_XY) {
+ /* arrays of x/y pixel coords */
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ const GLint col = span->array->x[i] % 32;
+ const GLint row = span->array->y[i] % 32;
+ const GLuint stipple = ctx->PolygonStipple[row];
+ if (((1 << col) & stipple) == 0) {
+ mask[i] = 0;
+ }
+ }
+ }
+ else {
+ /* horizontal span of pixels */
+ const GLuint highBit = 1 << 31;
+ const GLuint stipple = ctx->PolygonStipple[span->y % 32];
+ GLuint i, m = highBit >> (GLuint) (span->x % 32);
+ for (i = 0; i < span->end; i++) {
+ if ((m & stipple) == 0) {
+ mask[i] = 0;
+ }
+ m = m >> 1;
+ if (m == 0) {
+ m = highBit;
+ }
+ }
+ }
+ span->writeAll = GL_FALSE;
+}
+
+
+/**
+ * Clip a pixel span to the current buffer/window boundaries:
+ * DrawBuffer->_Xmin, _Xmax, _Ymin, _Ymax. This will accomplish
+ * window clipping and scissoring.
+ * Return: GL_TRUE some pixels still visible
+ * GL_FALSE nothing visible
+ */
+static INLINE GLuint
+clip_span( struct gl_context *ctx, SWspan *span )
+{
+ const GLint xmin = ctx->DrawBuffer->_Xmin;
+ const GLint xmax = ctx->DrawBuffer->_Xmax;
+ const GLint ymin = ctx->DrawBuffer->_Ymin;
+ const GLint ymax = ctx->DrawBuffer->_Ymax;
+
+ span->leftClip = 0;
+
+ if (span->arrayMask & SPAN_XY) {
+ /* arrays of x/y pixel coords */
+ const GLint *x = span->array->x;
+ const GLint *y = span->array->y;
+ const GLint n = span->end;
+ GLubyte *mask = span->array->mask;
+ GLint i;
+ if (span->arrayMask & SPAN_MASK) {
+ /* note: using & intead of && to reduce branches */
+ for (i = 0; i < n; i++) {
+ mask[i] &= (x[i] >= xmin) & (x[i] < xmax)
+ & (y[i] >= ymin) & (y[i] < ymax);
+ }
+ }
+ else {
+ /* note: using & intead of && to reduce branches */
+ for (i = 0; i < n; i++) {
+ mask[i] = (x[i] >= xmin) & (x[i] < xmax)
+ & (y[i] >= ymin) & (y[i] < ymax);
+ }
+ }
+ return GL_TRUE; /* some pixels visible */
+ }
+ else {
+ /* horizontal span of pixels */
+ const GLint x = span->x;
+ const GLint y = span->y;
+ GLint n = span->end;
+
+ /* Trivial rejection tests */
+ if (y < ymin || y >= ymax || x + n <= xmin || x >= xmax) {
+ span->end = 0;
+ return GL_FALSE; /* all pixels clipped */
+ }
+
+ /* Clip to right */
+ if (x + n > xmax) {
+ ASSERT(x < xmax);
+ n = span->end = xmax - x;
+ }
+
+ /* Clip to the left */
+ if (x < xmin) {
+ const GLint leftClip = xmin - x;
+ GLuint i;
+
+ ASSERT(leftClip > 0);
+ ASSERT(x + n > xmin);
+
+ /* Clip 'leftClip' pixels from the left side.
+ * The span->leftClip field will be applied when we interpolate
+ * fragment attributes.
+ * For arrays of values, shift them left.
+ */
+ for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+ if (span->interpMask & (1 << i)) {
+ GLuint j;
+ for (j = 0; j < 4; j++) {
+ span->attrStart[i][j] += leftClip * span->attrStepX[i][j];
+ }
+ }
+ }
+
+ span->red += leftClip * span->redStep;
+ span->green += leftClip * span->greenStep;
+ span->blue += leftClip * span->blueStep;
+ span->alpha += leftClip * span->alphaStep;
+ span->index += leftClip * span->indexStep;
+ span->z += leftClip * span->zStep;
+ span->intTex[0] += leftClip * span->intTexStep[0];
+ span->intTex[1] += leftClip * span->intTexStep[1];
+
+#define SHIFT_ARRAY(ARRAY, SHIFT, LEN) \
+ memcpy(ARRAY, ARRAY + (SHIFT), (LEN) * sizeof(ARRAY[0]))
+
+ for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+ if (span->arrayAttribs & (1 << i)) {
+ /* shift array elements left by 'leftClip' */
+ SHIFT_ARRAY(span->array->attribs[i], leftClip, n - leftClip);
+ }
+ }
+
+ SHIFT_ARRAY(span->array->mask, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->rgba8, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->rgba16, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->x, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->y, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->z, leftClip, n - leftClip);
+ SHIFT_ARRAY(span->array->index, leftClip, n - leftClip);
+ for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
+ SHIFT_ARRAY(span->array->lambda[i], leftClip, n - leftClip);
+ }
+ SHIFT_ARRAY(span->array->coverage, leftClip, n - leftClip);
+
+#undef SHIFT_ARRAY
+
+ span->leftClip = leftClip;
+ span->x = xmin;
+ span->end -= leftClip;
+ span->writeAll = GL_FALSE;
+ }
+
+ ASSERT(span->x >= xmin);
+ ASSERT(span->x + span->end <= xmax);
+ ASSERT(span->y >= ymin);
+ ASSERT(span->y < ymax);
+
+ return GL_TRUE; /* some pixels visible */
+ }
+}
+
+
+/**
+ * Add specular colors to primary colors.
+ * Only called during fixed-function operation.
+ * Result is float color array (FRAG_ATTRIB_COL0).
+ */
+static INLINE void
+add_specular(struct gl_context *ctx, SWspan *span)
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLubyte *mask = span->array->mask;
+ GLfloat (*col0)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ GLfloat (*col1)[4] = span->array->attribs[FRAG_ATTRIB_COL1];
+ GLuint i;
+
+ ASSERT(!ctx->FragmentProgram._Current);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(swrast->_ActiveAttribMask & FRAG_BIT_COL1);
+ (void) swrast; /* silence warning */
+
+ if (span->array->ChanType == GL_FLOAT) {
+ if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) {
+ interpolate_active_attribs(ctx, span, FRAG_BIT_COL0);
+ }
+ }
+ else {
+ /* need float colors */
+ if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) {
+ interpolate_float_colors(span);
+ }
+ }
+
+ if ((span->arrayAttribs & FRAG_BIT_COL1) == 0) {
+ /* XXX could avoid this and interpolate COL1 in the loop below */
+ interpolate_active_attribs(ctx, span, FRAG_BIT_COL1);
+ }
+
+ ASSERT(span->arrayAttribs & FRAG_BIT_COL0);
+ ASSERT(span->arrayAttribs & FRAG_BIT_COL1);
+
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ col0[i][0] += col1[i][0];
+ col0[i][1] += col1[i][1];
+ col0[i][2] += col1[i][2];
+ }
+ }
+
+ span->array->ChanType = GL_FLOAT;
+}
+
+
+/**
+ * Apply antialiasing coverage value to alpha values.
+ */
+static INLINE void
+apply_aa_coverage(SWspan *span)
+{
+ const GLfloat *coverage = span->array->coverage;
+ GLuint i;
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat a = rgba[i][ACOMP] * coverage[i];
+ rgba[i][ACOMP] = (GLubyte) CLAMP(a, 0.0, 255.0);
+ ASSERT(coverage[i] >= 0.0);
+ ASSERT(coverage[i] <= 1.0);
+ }
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat a = rgba[i][ACOMP] * coverage[i];
+ rgba[i][ACOMP] = (GLushort) CLAMP(a, 0.0, 65535.0);
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ for (i = 0; i < span->end; i++) {
+ rgba[i][ACOMP] = rgba[i][ACOMP] * coverage[i];
+ /* clamp later */
+ }
+ }
+}
+
+
+/**
+ * Clamp span's float colors to [0,1]
+ */
+static INLINE void
+clamp_colors(SWspan *span)
+{
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ GLuint i;
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ for (i = 0; i < span->end; i++) {
+ rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+ rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+ rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+ rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+ }
+}
+
+
+/**
+ * Convert the span's color arrays to the given type.
+ * The only way 'output' can be greater than zero is when we have a fragment
+ * program that writes to gl_FragData[1] or higher.
+ * \param output which fragment program color output is being processed
+ */
+static INLINE void
+convert_color_type(SWspan *span, GLenum newType, GLuint output)
+{
+ GLvoid *src, *dst;
+
+ if (output > 0 || span->array->ChanType == GL_FLOAT) {
+ src = span->array->attribs[FRAG_ATTRIB_COL0 + output];
+ span->array->ChanType = GL_FLOAT;
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ src = span->array->rgba8;
+ }
+ else {
+ ASSERT(span->array->ChanType == GL_UNSIGNED_SHORT);
+ src = span->array->rgba16;
+ }
+
+ if (newType == GL_UNSIGNED_BYTE) {
+ dst = span->array->rgba8;
+ }
+ else if (newType == GL_UNSIGNED_SHORT) {
+ dst = span->array->rgba16;
+ }
+ else {
+ dst = span->array->attribs[FRAG_ATTRIB_COL0];
+ }
+
+ _mesa_convert_colors(span->array->ChanType, src,
+ newType, dst,
+ span->end, span->array->mask);
+
+ span->array->ChanType = newType;
+ span->array->rgba = dst;
+}
+
+
+
+/**
+ * Apply fragment shader, fragment program or normal texturing to span.
+ */
+static INLINE void
+shade_texture_span(struct gl_context *ctx, SWspan *span)
+{
+ GLbitfield inputsRead;
+
+ /* Determine which fragment attributes are actually needed */
+ if (ctx->FragmentProgram._Current) {
+ inputsRead = ctx->FragmentProgram._Current->Base.InputsRead;
+ }
+ else {
+ /* XXX we could be a bit smarter about this */
+ inputsRead = ~0;
+ }
+
+ if (ctx->FragmentProgram._Current ||
+ ctx->ATIFragmentShader._Enabled) {
+ /* programmable shading */
+ if (span->primitive == GL_BITMAP && span->array->ChanType != GL_FLOAT) {
+ convert_color_type(span, GL_FLOAT, 0);
+ }
+ else {
+ span->array->rgba = (void *) span->array->attribs[FRAG_ATTRIB_COL0];
+ }
+
+ if (span->primitive != GL_POINT ||
+ (span->interpMask & SPAN_RGBA) ||
+ ctx->Point.PointSprite) {
+ /* for single-pixel points, we populated the arrays already */
+ interpolate_active_attribs(ctx, span, ~0);
+ }
+ span->array->ChanType = GL_FLOAT;
+
+ if (!(span->arrayMask & SPAN_Z))
+ _swrast_span_interpolate_z (ctx, span);
+
+#if 0
+ if (inputsRead & FRAG_BIT_WPOS)
+#else
+ /* XXX always interpolate wpos so that DDX/DDY work */
+#endif
+ interpolate_wpos(ctx, span);
+
+ /* Run fragment program/shader now */
+ if (ctx->FragmentProgram._Current) {
+ _swrast_exec_fragment_program(ctx, span);
+ }
+ else {
+ ASSERT(ctx->ATIFragmentShader._Enabled);
+ _swrast_exec_fragment_shader(ctx, span);
+ }
+ }
+ else if (ctx->Texture._EnabledCoordUnits) {
+ /* conventional texturing */
+
+#if CHAN_BITS == 32
+ if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) {
+ interpolate_int_colors(ctx, span);
+ }
+#else
+ if (!(span->arrayMask & SPAN_RGBA))
+ interpolate_int_colors(ctx, span);
+#endif
+ if ((span->arrayAttribs & FRAG_BITS_TEX_ANY) == 0x0)
+ interpolate_texcoords(ctx, span);
+
+ _swrast_texture_span(ctx, span);
+ }
+}
+
+
+
+/**
+ * Apply all the per-fragment operations to a span.
+ * This now includes texturing (_swrast_write_texture_span() is history).
+ * This function may modify any of the array values in the span.
+ * span->interpMask and span->arrayMask may be changed but will be restored
+ * to their original values before returning.
+ */
+void
+_swrast_write_rgba_span( struct gl_context *ctx, SWspan *span)
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLuint *colorMask = (GLuint *) ctx->Color.ColorMask;
+ const GLbitfield origInterpMask = span->interpMask;
+ const GLbitfield origArrayMask = span->arrayMask;
+ const GLbitfield origArrayAttribs = span->arrayAttribs;
+ const GLenum origChanType = span->array->ChanType;
+ void * const origRgba = span->array->rgba;
+ const GLboolean shader = (ctx->FragmentProgram._Current
+ || ctx->ATIFragmentShader._Enabled);
+ const GLboolean shaderOrTexture = shader || ctx->Texture._EnabledCoordUnits;
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ /*
+ printf("%s() interp 0x%x array 0x%x\n", __FUNCTION__,
+ span->interpMask, span->arrayMask);
+ */
+
+ ASSERT(span->primitive == GL_POINT ||
+ span->primitive == GL_LINE ||
+ span->primitive == GL_POLYGON ||
+ span->primitive == GL_BITMAP);
+
+ /* Fragment write masks */
+ if (span->arrayMask & SPAN_MASK) {
+ /* mask was initialized by caller, probably glBitmap */
+ span->writeAll = GL_FALSE;
+ }
+ else {
+ memset(span->array->mask, 1, span->end);
+ span->writeAll = GL_TRUE;
+ }
+
+ /* Clip to window/scissor box */
+ if (!clip_span(ctx, span)) {
+ return;
+ }
+
+ ASSERT(span->end <= MAX_WIDTH);
+
+ /* Depth bounds test */
+ if (ctx->Depth.BoundsTest && fb->Visual.depthBits > 0) {
+ if (!_swrast_depth_bounds_test(ctx, span)) {
+ return;
+ }
+ }
+
+#ifdef DEBUG
+ /* Make sure all fragments are within window bounds */
+ if (span->arrayMask & SPAN_XY) {
+ /* array of pixel locations */
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ assert(span->array->x[i] >= fb->_Xmin);
+ assert(span->array->x[i] < fb->_Xmax);
+ assert(span->array->y[i] >= fb->_Ymin);
+ assert(span->array->y[i] < fb->_Ymax);
+ }
+ }
+ }
+#endif
+
+ /* Polygon Stippling */
+ if (ctx->Polygon.StippleFlag && span->primitive == GL_POLYGON) {
+ stipple_polygon_span(ctx, span);
+ }
+
+ /* This is the normal place to compute the fragment color/Z
+ * from texturing or shading.
+ */
+ if (shaderOrTexture && !swrast->_DeferredTexture) {
+ shade_texture_span(ctx, span);
+ }
+
+ /* Do the alpha test */
+ if (ctx->Color.AlphaEnabled) {
+ if (!_swrast_alpha_test(ctx, span)) {
+ /* all fragments failed test */
+ goto end;
+ }
+ }
+
+ /* Stencil and Z testing */
+ if (ctx->Stencil._Enabled || ctx->Depth.Test) {
+ if (!(span->arrayMask & SPAN_Z))
+ _swrast_span_interpolate_z(ctx, span);
+
+ if (ctx->Transform.DepthClamp)
+ _swrast_depth_clamp_span(ctx, span);
+
+ if (ctx->Stencil._Enabled) {
+ /* Combined Z/stencil tests */
+ if (!_swrast_stencil_and_ztest_span(ctx, span)) {
+ /* all fragments failed test */
+ goto end;
+ }
+ }
+ else if (fb->Visual.depthBits > 0) {
+ /* Just regular depth testing */
+ ASSERT(ctx->Depth.Test);
+ ASSERT(span->arrayMask & SPAN_Z);
+ if (!_swrast_depth_test_span(ctx, span)) {
+ /* all fragments failed test */
+ goto end;
+ }
+ }
+ }
+
+ if (ctx->Query.CurrentOcclusionObject) {
+ /* update count of 'passed' fragments */
+ struct gl_query_object *q = ctx->Query.CurrentOcclusionObject;
+ GLuint i;
+ for (i = 0; i < span->end; i++)
+ q->Result += span->array->mask[i];
+ }
+
+ /* We had to wait until now to check for glColorMask(0,0,0,0) because of
+ * the occlusion test.
+ */
+ if (fb->_NumColorDrawBuffers == 1 && colorMask[0] == 0x0) {
+ /* no colors to write */
+ goto end;
+ }
+
+ /* If we were able to defer fragment color computation to now, there's
+ * a good chance that many fragments will have already been killed by
+ * Z/stencil testing.
+ */
+ if (shaderOrTexture && swrast->_DeferredTexture) {
+ shade_texture_span(ctx, span);
+ }
+
+#if CHAN_BITS == 32
+ if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) {
+ interpolate_active_attribs(ctx, span, FRAG_BIT_COL0);
+ }
+#else
+ if ((span->arrayMask & SPAN_RGBA) == 0) {
+ interpolate_int_colors(ctx, span);
+ }
+#endif
+
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ if (span->primitive == GL_BITMAP || !swrast->SpecularVertexAdd) {
+ /* Add primary and specular (diffuse + specular) colors */
+ if (!shader) {
+ if (ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+ add_specular(ctx, span);
+ }
+ }
+ }
+
+ /* Fog */
+ if (swrast->_FogEnabled) {
+ _swrast_fog_rgba_span(ctx, span);
+ }
+
+ /* Antialias coverage application */
+ if (span->arrayMask & SPAN_COVERAGE) {
+ apply_aa_coverage(span);
+ }
+
+ /* Clamp color/alpha values over the range [0.0, 1.0] before storage */
+ if (ctx->Color.ClampFragmentColor == GL_TRUE &&
+ span->array->ChanType == GL_FLOAT) {
+ clamp_colors(span);
+ }
+
+ /*
+ * Write to renderbuffers.
+ * Depending on glDrawBuffer() state and the which color outputs are
+ * written by the fragment shader, we may either replicate one color to
+ * all renderbuffers or write a different color to each renderbuffer.
+ * multiFragOutputs=TRUE for the later case.
+ */
+ {
+ const GLuint numBuffers = fb->_NumColorDrawBuffers;
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+ const GLboolean multiFragOutputs =
+ (fp && fp->Base.OutputsWritten >= (1 << FRAG_RESULT_DATA0));
+ GLuint buf;
+
+ for (buf = 0; buf < numBuffers; buf++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buf];
+
+ /* color[fragOutput] will be written to buffer[buf] */
+
+ if (rb) {
+ GLchan rgbaSave[MAX_WIDTH][4];
+ const GLuint fragOutput = multiFragOutputs ? buf : 0;
+
+ /* set span->array->rgba to colors for render buffer's datatype */
+ if (rb->DataType != span->array->ChanType || fragOutput > 0) {
+ convert_color_type(span, rb->DataType, fragOutput);
+ }
+ else {
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ span->array->rgba = span->array->rgba8;
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ span->array->rgba = (void *) span->array->rgba16;
+ }
+ else {
+ span->array->rgba = (void *)
+ span->array->attribs[FRAG_ATTRIB_COL0];
+ }
+ }
+
+ if (!multiFragOutputs && numBuffers > 1) {
+ /* save colors for second, third renderbuffer writes */
+ memcpy(rgbaSave, span->array->rgba,
+ 4 * span->end * sizeof(GLchan));
+ }
+
+ ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB ||
+ rb->_BaseFormat == GL_ALPHA);
+
+ if (ctx->Color._LogicOpEnabled) {
+ _swrast_logicop_rgba_span(ctx, rb, span);
+ }
+ else if ((ctx->Color.BlendEnabled >> buf) & 1) {
+ _swrast_blend_span(ctx, rb, span);
+ }
+
+ if (colorMask[buf] != 0xffffffff) {
+ _swrast_mask_rgba_span(ctx, rb, span, buf);
+ }
+
+ if (span->arrayMask & SPAN_XY) {
+ /* array of pixel coords */
+ ASSERT(rb->PutValues);
+ rb->PutValues(ctx, rb, span->end,
+ span->array->x, span->array->y,
+ span->array->rgba, span->array->mask);
+ }
+ else {
+ /* horizontal run of pixels */
+ ASSERT(rb->PutRow);
+ rb->PutRow(ctx, rb, span->end, span->x, span->y,
+ span->array->rgba,
+ span->writeAll ? NULL: span->array->mask);
+ }
+
+ if (!multiFragOutputs && numBuffers > 1) {
+ /* restore original span values */
+ memcpy(span->array->rgba, rgbaSave,
+ 4 * span->end * sizeof(GLchan));
+ }
+
+ } /* if rb */
+ } /* for buf */
+ }
+
+end:
+ /* restore these values before returning */
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+ span->arrayAttribs = origArrayAttribs;
+ span->array->ChanType = origChanType;
+ span->array->rgba = origRgba;
+}
+
+
+/**
+ * Read RGBA pixels from a renderbuffer. Clipping will be done to prevent
+ * reading ouside the buffer's boundaries.
+ * \param dstType datatype for returned colors
+ * \param rgba the returned colors
+ */
+void
+_swrast_read_rgba_span( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLenum dstType,
+ GLvoid *rgba)
+{
+ const GLint bufWidth = (GLint) rb->Width;
+ const GLint bufHeight = (GLint) rb->Height;
+
+ if (y < 0 || y >= bufHeight || x + (GLint) n < 0 || x >= bufWidth) {
+ /* completely above, below, or right */
+ /* XXX maybe leave rgba values undefined? */
+ memset(rgba, 0, 4 * n * sizeof(GLchan));
+ }
+ else {
+ GLint skip, length;
+ if (x < 0) {
+ /* left edge clipping */
+ skip = -x;
+ length = (GLint) n - skip;
+ if (length < 0) {
+ /* completely left of window */
+ return;
+ }
+ if (length > bufWidth) {
+ length = bufWidth;
+ }
+ }
+ else if ((GLint) (x + n) > bufWidth) {
+ /* right edge clipping */
+ skip = 0;
+ length = bufWidth - x;
+ if (length < 0) {
+ /* completely to right of window */
+ return;
+ }
+ }
+ else {
+ /* no clipping */
+ skip = 0;
+ length = (GLint) n;
+ }
+
+ ASSERT(rb);
+ ASSERT(rb->GetRow);
+ ASSERT(rb->_BaseFormat == GL_RGB || rb->_BaseFormat == GL_RGBA ||
+ rb->_BaseFormat == GL_ALPHA);
+
+ if (rb->DataType == dstType) {
+ rb->GetRow(ctx, rb, length, x + skip, y,
+ (GLubyte *) rgba + skip * RGBA_PIXEL_SIZE(rb->DataType));
+ }
+ else {
+ GLuint temp[MAX_WIDTH * 4];
+ rb->GetRow(ctx, rb, length, x + skip, y, temp);
+ _mesa_convert_colors(rb->DataType, temp,
+ dstType, (GLubyte *) rgba + skip * RGBA_PIXEL_SIZE(dstType),
+ length, NULL);
+ }
+ }
+}
+
+
+/**
+ * Wrapper for gl_renderbuffer::GetValues() which does clipping to avoid
+ * reading values outside the buffer bounds.
+ * We can use this for reading any format/type of renderbuffer.
+ * \param valueSize is the size in bytes of each value (pixel) put into the
+ * values array.
+ */
+void
+_swrast_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values, GLuint valueSize)
+{
+ GLuint i, inCount = 0, inStart = 0;
+
+ for (i = 0; i < count; i++) {
+ if (x[i] >= 0 && y[i] >= 0 &&
+ x[i] < (GLint) rb->Width && y[i] < (GLint) rb->Height) {
+ /* inside */
+ if (inCount == 0)
+ inStart = i;
+ inCount++;
+ }
+ else {
+ if (inCount > 0) {
+ /* read [inStart, inStart + inCount) */
+ rb->GetValues(ctx, rb, inCount, x + inStart, y + inStart,
+ (GLubyte *) values + inStart * valueSize);
+ inCount = 0;
+ }
+ }
+ }
+ if (inCount > 0) {
+ /* read last values */
+ rb->GetValues(ctx, rb, inCount, x + inStart, y + inStart,
+ (GLubyte *) values + inStart * valueSize);
+ }
+}
+
+
+/**
+ * Wrapper for gl_renderbuffer::PutRow() which does clipping.
+ * \param valueSize size of each value (pixel) in bytes
+ */
+void
+_swrast_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const GLvoid *values, GLuint valueSize)
+{
+ GLint skip = 0;
+
+ if (y < 0 || y >= (GLint) rb->Height)
+ return; /* above or below */
+
+ if (x + (GLint) count <= 0 || x >= (GLint) rb->Width)
+ return; /* entirely left or right */
+
+ if ((GLint) (x + count) > (GLint) rb->Width) {
+ /* right clip */
+ GLint clip = x + count - rb->Width;
+ count -= clip;
+ }
+
+ if (x < 0) {
+ /* left clip */
+ skip = -x;
+ x = 0;
+ count -= skip;
+ }
+
+ rb->PutRow(ctx, rb, count, x, y,
+ (const GLubyte *) values + skip * valueSize, NULL);
+}
+
+
+/**
+ * Wrapper for gl_renderbuffer::GetRow() which does clipping.
+ * \param valueSize size of each value (pixel) in bytes
+ */
+void
+_swrast_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ GLvoid *values, GLuint valueSize)
+{
+ GLint skip = 0;
+
+ if (y < 0 || y >= (GLint) rb->Height)
+ return; /* above or below */
+
+ if (x + (GLint) count <= 0 || x >= (GLint) rb->Width)
+ return; /* entirely left or right */
+
+ if (x + count > rb->Width) {
+ /* right clip */
+ GLint clip = x + count - rb->Width;
+ count -= clip;
+ }
+
+ if (x < 0) {
+ /* left clip */
+ skip = -x;
+ x = 0;
+ count -= skip;
+ }
+
+ rb->GetRow(ctx, rb, count, x, y, (GLubyte *) values + skip * valueSize);
+}
+
+
+/**
+ * Get RGBA pixels from the given renderbuffer.
+ * Used by blending, logicop and masking functions.
+ * \return pointer to the colors we read.
+ */
+void *
+_swrast_get_dest_rgba(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span)
+{
+ const GLuint pixelSize = RGBA_PIXEL_SIZE(span->array->ChanType);
+ void *rbPixels;
+
+ /* Point rbPixels to a temporary space */
+ rbPixels = span->array->attribs[FRAG_ATTRIB_MAX - 1];
+
+ /* Get destination values from renderbuffer */
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ rbPixels, pixelSize);
+ }
+ else {
+ _swrast_get_row(ctx, rb, span->end, span->x, span->y,
+ rbPixels, pixelSize);
+ }
+
+ return rbPixels;
+}
diff --git a/mesalib/src/mesa/swrast/s_span.h b/mesalib/src/mesa/swrast/s_span.h index aaf1fec2a..d3cce304f 100644 --- a/mesalib/src/mesa/swrast/s_span.h +++ b/mesalib/src/mesa/swrast/s_span.h @@ -1,218 +1,223 @@ -/* - * Mesa 3-D graphics library - * Version: 7.5 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * Copyright (C) 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_SPAN_H -#define S_SPAN_H - - -#include "swrast.h" - - -/** - * \defgroup SpanFlags - * Special bitflags to describe span data. - * - * In general, the point/line/triangle functions interpolate/emit the - * attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values). - * Some things don't fit into that, though, so we have these flags. - */ -/*@{*/ -#define SPAN_RGBA 0x01 /**< interpMask and arrayMask */ -#define SPAN_Z 0x02 /**< interpMask and arrayMask */ -#define SPAN_FLAT 0x04 /**< interpMask: flat shading? */ -#define SPAN_XY 0x08 /**< array.x[], y[] valid? */ -#define SPAN_MASK 0x10 /**< was array.mask[] filled in by caller? */ -#define SPAN_LAMBDA 0x20 /**< array.lambda[] valid? */ -#define SPAN_COVERAGE 0x40 /**< array.coverage[] valid? */ -/*@}*/ - - -/** - * \sw_span_arrays - * \brief Arrays of fragment values. - * - * These will either be computed from the span x/xStep values or - * filled in by glDraw/CopyPixels, etc. - * These arrays are separated out of sw_span to conserve memory. - */ -typedef struct sw_span_arrays -{ - /** Per-fragment attributes (indexed by FRAG_ATTRIB_* tokens) */ - /* XXX someday look at transposing first two indexes for better memory - * access pattern. - */ - GLfloat attribs[FRAG_ATTRIB_MAX][MAX_WIDTH][4]; - - /** This mask indicates which fragments are alive or culled */ - GLubyte mask[MAX_WIDTH]; - - GLenum ChanType; /**< Color channel type, GL_UNSIGNED_BYTE, GL_FLOAT */ - - /** Attribute arrays that don't fit into attribs[] array above */ - /*@{*/ - GLubyte rgba8[MAX_WIDTH][4]; - GLushort rgba16[MAX_WIDTH][4]; - GLchan (*rgba)[4]; /** either == rgba8 or rgba16 */ - GLint x[MAX_WIDTH]; /**< fragment X coords */ - GLint y[MAX_WIDTH]; /**< fragment Y coords */ - GLuint z[MAX_WIDTH]; /**< fragment Z coords */ - GLuint index[MAX_WIDTH]; /**< Color indexes */ - GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH]; /**< Texture LOD */ - GLfloat coverage[MAX_WIDTH]; /**< Fragment coverage for AA/smoothing */ - /*@}*/ -} SWspanarrays; - - -/** - * The SWspan structure describes the colors, Z, fogcoord, texcoords, - * etc for either a horizontal run or an array of independent pixels. - * We can either specify a base/step to indicate interpolated values, or - * fill in explicit arrays of values. The interpMask and arrayMask bitfields - * indicate which attributes are active interpolants or arrays, respectively. - * - * It would be interesting to experiment with multiprocessor rasterization - * with this structure. The triangle rasterizer could simply emit a - * stream of these structures which would be consumed by one or more - * span-processing threads which could run in parallel. - */ -typedef struct sw_span -{ - /** Coord of first fragment in horizontal span/run */ - GLint x, y; - - /** Number of fragments in the span */ - GLuint end; - - /** for clipping left edge of spans */ - GLuint leftClip; - - /** This flag indicates that mask[] array is effectively filled with ones */ - GLboolean writeAll; - - /** either GL_POLYGON, GL_LINE, GL_POLYGON, GL_BITMAP */ - GLenum primitive; - - /** 0 = front-facing span, 1 = back-facing span (for two-sided stencil) */ - GLuint facing; - - /** - * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates - * which of the attrStart/StepX/StepY variables are relevant. - */ - GLbitfield interpMask; - - /** Fragment attribute interpolants */ - GLfloat attrStart[FRAG_ATTRIB_MAX][4]; /**< initial value */ - GLfloat attrStepX[FRAG_ATTRIB_MAX][4]; /**< dvalue/dx */ - GLfloat attrStepY[FRAG_ATTRIB_MAX][4]; /**< dvalue/dy */ - - /* XXX the rest of these will go away eventually... */ - - /* For horizontal spans, step is the partial derivative wrt X. - * For lines, step is the delta from one fragment to the next. - */ - GLfixed red, redStep; - GLfixed green, greenStep; - GLfixed blue, blueStep; - GLfixed alpha, alphaStep; - GLfixed index, indexStep; - GLfixed z, zStep; /**< XXX z should probably be GLuint */ - GLfixed intTex[2], intTexStep[2]; /**< (s,t) for unit[0] only */ - - /** - * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates - * which of the fragment arrays in the span_arrays struct are relevant. - */ - GLbitfield arrayMask; - - GLbitfield arrayAttribs; - - /** - * We store the arrays of fragment values in a separate struct so - * that we can allocate sw_span structs on the stack without using - * a lot of memory. The span_arrays struct is about 1.4MB while the - * sw_span struct is only about 512 bytes. - */ - SWspanarrays *array; -} SWspan; - - - -#define INIT_SPAN(S, PRIMITIVE) \ -do { \ - (S).primitive = (PRIMITIVE); \ - (S).interpMask = 0x0; \ - (S).arrayMask = 0x0; \ - (S).arrayAttribs = 0x0; \ - (S).end = 0; \ - (S).leftClip = 0; \ - (S).facing = 0; \ - (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \ -} while (0) - - - -extern void -_swrast_span_default_attribs(GLcontext *ctx, SWspan *span); - -extern void -_swrast_span_interpolate_z( const GLcontext *ctx, SWspan *span ); - -extern GLfloat -_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy, - GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH, - GLfloat s, GLfloat t, GLfloat q, GLfloat invQ); - - -extern void -_swrast_write_rgba_span( GLcontext *ctx, SWspan *span); - - -extern void -_swrast_read_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint n, GLint x, GLint y, GLenum type, GLvoid *rgba); - -extern void -_swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values, GLuint valueSize); - -extern void -_swrast_put_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const GLvoid *values, GLuint valueSize); - -extern void -_swrast_get_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - GLvoid *values, GLuint valueSize); - - -extern void * -_swrast_get_dest_rgba(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span); - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_SPAN_H
+#define S_SPAN_H
+
+
+#include "main/config.h"
+#include "main/glheader.h"
+#include "main/mtypes.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+/**
+ * \defgroup SpanFlags
+ * Special bitflags to describe span data.
+ *
+ * In general, the point/line/triangle functions interpolate/emit the
+ * attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values).
+ * Some things don't fit into that, though, so we have these flags.
+ */
+/*@{*/
+#define SPAN_RGBA 0x01 /**< interpMask and arrayMask */
+#define SPAN_Z 0x02 /**< interpMask and arrayMask */
+#define SPAN_FLAT 0x04 /**< interpMask: flat shading? */
+#define SPAN_XY 0x08 /**< array.x[], y[] valid? */
+#define SPAN_MASK 0x10 /**< was array.mask[] filled in by caller? */
+#define SPAN_LAMBDA 0x20 /**< array.lambda[] valid? */
+#define SPAN_COVERAGE 0x40 /**< array.coverage[] valid? */
+/*@}*/
+
+
+/**
+ * \sw_span_arrays
+ * \brief Arrays of fragment values.
+ *
+ * These will either be computed from the span x/xStep values or
+ * filled in by glDraw/CopyPixels, etc.
+ * These arrays are separated out of sw_span to conserve memory.
+ */
+typedef struct sw_span_arrays
+{
+ /** Per-fragment attributes (indexed by FRAG_ATTRIB_* tokens) */
+ /* XXX someday look at transposing first two indexes for better memory
+ * access pattern.
+ */
+ GLfloat attribs[FRAG_ATTRIB_MAX][MAX_WIDTH][4];
+
+ /** This mask indicates which fragments are alive or culled */
+ GLubyte mask[MAX_WIDTH];
+
+ GLenum ChanType; /**< Color channel type, GL_UNSIGNED_BYTE, GL_FLOAT */
+
+ /** Attribute arrays that don't fit into attribs[] array above */
+ /*@{*/
+ GLubyte rgba8[MAX_WIDTH][4];
+ GLushort rgba16[MAX_WIDTH][4];
+ GLchan (*rgba)[4]; /** either == rgba8 or rgba16 */
+ GLint x[MAX_WIDTH]; /**< fragment X coords */
+ GLint y[MAX_WIDTH]; /**< fragment Y coords */
+ GLuint z[MAX_WIDTH]; /**< fragment Z coords */
+ GLuint index[MAX_WIDTH]; /**< Color indexes */
+ GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH]; /**< Texture LOD */
+ GLfloat coverage[MAX_WIDTH]; /**< Fragment coverage for AA/smoothing */
+ /*@}*/
+} SWspanarrays;
+
+
+/**
+ * The SWspan structure describes the colors, Z, fogcoord, texcoords,
+ * etc for either a horizontal run or an array of independent pixels.
+ * We can either specify a base/step to indicate interpolated values, or
+ * fill in explicit arrays of values. The interpMask and arrayMask bitfields
+ * indicate which attributes are active interpolants or arrays, respectively.
+ *
+ * It would be interesting to experiment with multiprocessor rasterization
+ * with this structure. The triangle rasterizer could simply emit a
+ * stream of these structures which would be consumed by one or more
+ * span-processing threads which could run in parallel.
+ */
+typedef struct sw_span
+{
+ /** Coord of first fragment in horizontal span/run */
+ GLint x, y;
+
+ /** Number of fragments in the span */
+ GLuint end;
+
+ /** for clipping left edge of spans */
+ GLuint leftClip;
+
+ /** This flag indicates that mask[] array is effectively filled with ones */
+ GLboolean writeAll;
+
+ /** either GL_POLYGON, GL_LINE, GL_POLYGON, GL_BITMAP */
+ GLenum primitive;
+
+ /** 0 = front-facing span, 1 = back-facing span (for two-sided stencil) */
+ GLuint facing;
+
+ /**
+ * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates
+ * which of the attrStart/StepX/StepY variables are relevant.
+ */
+ GLbitfield interpMask;
+
+ /** Fragment attribute interpolants */
+ GLfloat attrStart[FRAG_ATTRIB_MAX][4]; /**< initial value */
+ GLfloat attrStepX[FRAG_ATTRIB_MAX][4]; /**< dvalue/dx */
+ GLfloat attrStepY[FRAG_ATTRIB_MAX][4]; /**< dvalue/dy */
+
+ /* XXX the rest of these will go away eventually... */
+
+ /* For horizontal spans, step is the partial derivative wrt X.
+ * For lines, step is the delta from one fragment to the next.
+ */
+ GLfixed red, redStep;
+ GLfixed green, greenStep;
+ GLfixed blue, blueStep;
+ GLfixed alpha, alphaStep;
+ GLfixed index, indexStep;
+ GLfixed z, zStep; /**< XXX z should probably be GLuint */
+ GLfixed intTex[2], intTexStep[2]; /**< (s,t) for unit[0] only */
+
+ /**
+ * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates
+ * which of the fragment arrays in the span_arrays struct are relevant.
+ */
+ GLbitfield arrayMask;
+
+ GLbitfield arrayAttribs;
+
+ /**
+ * We store the arrays of fragment values in a separate struct so
+ * that we can allocate sw_span structs on the stack without using
+ * a lot of memory. The span_arrays struct is about 1.4MB while the
+ * sw_span struct is only about 512 bytes.
+ */
+ SWspanarrays *array;
+} SWspan;
+
+
+
+#define INIT_SPAN(S, PRIMITIVE) \
+do { \
+ (S).primitive = (PRIMITIVE); \
+ (S).interpMask = 0x0; \
+ (S).arrayMask = 0x0; \
+ (S).arrayAttribs = 0x0; \
+ (S).end = 0; \
+ (S).leftClip = 0; \
+ (S).facing = 0; \
+ (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \
+} while (0)
+
+
+
+extern void
+_swrast_span_default_attribs(struct gl_context *ctx, SWspan *span);
+
+extern void
+_swrast_span_interpolate_z( const struct gl_context *ctx, SWspan *span );
+
+extern GLfloat
+_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
+ GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
+ GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
+
+
+extern void
+_swrast_write_rgba_span( struct gl_context *ctx, SWspan *span);
+
+
+extern void
+_swrast_read_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLenum type, GLvoid *rgba);
+
+extern void
+_swrast_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values, GLuint valueSize);
+
+extern void
+_swrast_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const GLvoid *values, GLuint valueSize);
+
+extern void
+_swrast_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ GLvoid *values, GLuint valueSize);
+
+
+extern void *
+_swrast_get_dest_rgba(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span);
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_spantemp.h b/mesalib/src/mesa/swrast/s_spantemp.h index 2948a90f6..125d19638 100644 --- a/mesalib/src/mesa/swrast/s_spantemp.h +++ b/mesalib/src/mesa/swrast/s_spantemp.h @@ -1,221 +1,221 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.1 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * Templates for the span/pixel-array write/read functions called via - * the gl_renderbuffer's GetRow, GetValues, PutRow, PutMonoRow, PutValues - * and PutMonoValues functions. - * - * Define the following macros before including this file: - * NAME(BASE) to generate the function name (i.e. add prefix or suffix) - * RB_TYPE the renderbuffer DataType - * SPAN_VARS to declare any local variables - * INIT_PIXEL_PTR(P, X, Y) to initialize a pointer to a pixel - * INC_PIXEL_PTR(P) to increment a pixel pointer by one pixel - * STORE_PIXEL(DST, X, Y, VALUE) to store pixel values in buffer - * FETCH_PIXEL(DST, SRC) to fetch pixel values from buffer - * - * Note that in the STORE_PIXEL macros, we also pass in the (X,Y) coordinates - * for the pixels to be stored. This is useful when dithering and probably - * ignored otherwise. - */ - -#include "main/macros.h" - - -#if !defined(RB_COMPONENTS) -#define RB_COMPONENTS 4 -#endif - - -static void -NAME(get_row)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values; - GLuint i; - INIT_PIXEL_PTR(pixel, x, y); - for (i = 0; i < count; i++) { - FETCH_PIXEL(dest[i], pixel); - INC_PIXEL_PTR(pixel); - } - (void) rb; -} - - -static void -NAME(get_values)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], void *values ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values; - GLuint i; - for (i = 0; i < count; i++) { - INIT_PIXEL_PTR(pixel, x[i], y[i]); - FETCH_PIXEL(dest[i], pixel); - } - (void) rb; -} - - -static void -NAME(put_row)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *values, const GLubyte mask[] ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values; - GLuint i; - INIT_PIXEL_PTR(pixel, x, y); - if (mask) { - for (i = 0; i < count; i++) { - if (mask[i]) { - STORE_PIXEL(pixel, x + i, y, src[i]); - } - INC_PIXEL_PTR(pixel); - } - } - else { - for (i = 0; i < count; i++) { - STORE_PIXEL(pixel, x + i, y, src[i]); - INC_PIXEL_PTR(pixel); - } - } - (void) rb; -} - - -static void -NAME(put_row_rgb)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *values, const GLubyte mask[] ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - const RB_TYPE (*src)[3] = (const RB_TYPE (*)[3]) values; - GLuint i; - INIT_PIXEL_PTR(pixel, x, y); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { -#ifdef STORE_PIXEL_RGB - STORE_PIXEL_RGB(pixel, x + i, y, src[i]); -#else - STORE_PIXEL(pixel, x + i, y, src[i]); -#endif - } - INC_PIXEL_PTR(pixel); - } - (void) rb; -} - - -static void -NAME(put_mono_row)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *value, const GLubyte mask[] ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - const RB_TYPE *src = (const RB_TYPE *) value; - GLuint i; - INIT_PIXEL_PTR(pixel, x, y); - if (mask) { - for (i = 0; i < count; i++) { - if (mask[i]) { - STORE_PIXEL(pixel, x + i, y, src); - } - INC_PIXEL_PTR(pixel); - } - } - else { - for (i = 0; i < count; i++) { - STORE_PIXEL(pixel, x + i, y, src); - INC_PIXEL_PTR(pixel); - } - } - (void) rb; -} - - -static void -NAME(put_values)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *values, const GLubyte mask[] ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values; - GLuint i; - ASSERT(mask); - for (i = 0; i < count; i++) { - if (mask[i]) { - INIT_PIXEL_PTR(pixel, x[i], y[i]); - STORE_PIXEL(pixel, x[i], y[i], src[i]); - } - } - (void) rb; -} - - -static void -NAME(put_mono_values)( GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte mask[] ) -{ -#ifdef SPAN_VARS - SPAN_VARS -#endif - const RB_TYPE *src = (const RB_TYPE *) value; - GLuint i; - ASSERT(mask); - for (i = 0; i < count; i++) { - if (mask[i]) { - INIT_PIXEL_PTR(pixel, x[i], y[i]); - STORE_PIXEL(pixel, x[i], y[i], src); - } - } - (void) rb; -} - - -#undef NAME -#undef RB_TYPE -#undef RB_COMPONENTS -#undef SPAN_VARS -#undef INIT_PIXEL_PTR -#undef INC_PIXEL_PTR -#undef STORE_PIXEL -#undef STORE_PIXEL_RGB -#undef FETCH_PIXEL +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.1
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Templates for the span/pixel-array write/read functions called via
+ * the gl_renderbuffer's GetRow, GetValues, PutRow, PutMonoRow, PutValues
+ * and PutMonoValues functions.
+ *
+ * Define the following macros before including this file:
+ * NAME(BASE) to generate the function name (i.e. add prefix or suffix)
+ * RB_TYPE the renderbuffer DataType
+ * SPAN_VARS to declare any local variables
+ * INIT_PIXEL_PTR(P, X, Y) to initialize a pointer to a pixel
+ * INC_PIXEL_PTR(P) to increment a pixel pointer by one pixel
+ * STORE_PIXEL(DST, X, Y, VALUE) to store pixel values in buffer
+ * FETCH_PIXEL(DST, SRC) to fetch pixel values from buffer
+ *
+ * Note that in the STORE_PIXEL macros, we also pass in the (X,Y) coordinates
+ * for the pixels to be stored. This is useful when dithering and probably
+ * ignored otherwise.
+ */
+
+#include "main/macros.h"
+
+
+#if !defined(RB_COMPONENTS)
+#define RB_COMPONENTS 4
+#endif
+
+
+static void
+NAME(get_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
+ GLuint i;
+ INIT_PIXEL_PTR(pixel, x, y);
+ for (i = 0; i < count; i++) {
+ FETCH_PIXEL(dest[i], pixel);
+ INC_PIXEL_PTR(pixel);
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(get_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[], void *values )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ INIT_PIXEL_PTR(pixel, x[i], y[i]);
+ FETCH_PIXEL(dest[i], pixel);
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(put_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *values, const GLubyte mask[] )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
+ GLuint i;
+ INIT_PIXEL_PTR(pixel, x, y);
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ STORE_PIXEL(pixel, x + i, y, src[i]);
+ }
+ INC_PIXEL_PTR(pixel);
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ STORE_PIXEL(pixel, x + i, y, src[i]);
+ INC_PIXEL_PTR(pixel);
+ }
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(put_row_rgb)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *values, const GLubyte mask[] )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ const RB_TYPE (*src)[3] = (const RB_TYPE (*)[3]) values;
+ GLuint i;
+ INIT_PIXEL_PTR(pixel, x, y);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+#ifdef STORE_PIXEL_RGB
+ STORE_PIXEL_RGB(pixel, x + i, y, src[i]);
+#else
+ STORE_PIXEL(pixel, x + i, y, src[i]);
+#endif
+ }
+ INC_PIXEL_PTR(pixel);
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(put_mono_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *value, const GLubyte mask[] )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ const RB_TYPE *src = (const RB_TYPE *) value;
+ GLuint i;
+ INIT_PIXEL_PTR(pixel, x, y);
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ STORE_PIXEL(pixel, x + i, y, src);
+ }
+ INC_PIXEL_PTR(pixel);
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ STORE_PIXEL(pixel, x + i, y, src);
+ INC_PIXEL_PTR(pixel);
+ }
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(put_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *values, const GLubyte mask[] )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
+ GLuint i;
+ ASSERT(mask);
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ INIT_PIXEL_PTR(pixel, x[i], y[i]);
+ STORE_PIXEL(pixel, x[i], y[i], src[i]);
+ }
+ }
+ (void) rb;
+}
+
+
+static void
+NAME(put_mono_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte mask[] )
+{
+#ifdef SPAN_VARS
+ SPAN_VARS
+#endif
+ const RB_TYPE *src = (const RB_TYPE *) value;
+ GLuint i;
+ ASSERT(mask);
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ INIT_PIXEL_PTR(pixel, x[i], y[i]);
+ STORE_PIXEL(pixel, x[i], y[i], src);
+ }
+ }
+ (void) rb;
+}
+
+
+#undef NAME
+#undef RB_TYPE
+#undef RB_COMPONENTS
+#undef SPAN_VARS
+#undef INIT_PIXEL_PTR
+#undef INC_PIXEL_PTR
+#undef STORE_PIXEL
+#undef STORE_PIXEL_RGB
+#undef FETCH_PIXEL
diff --git a/mesalib/src/mesa/swrast/s_stencil.c b/mesalib/src/mesa/swrast/s_stencil.c index aa74b21ee..999fe3c3f 100644 --- a/mesalib/src/mesa/swrast/s_stencil.c +++ b/mesalib/src/mesa/swrast/s_stencil.c @@ -1,1245 +1,1245 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/imports.h" - -#include "s_context.h" -#include "s_depth.h" -#include "s_stencil.h" -#include "s_span.h" - - - -/* Stencil Logic: - -IF stencil test fails THEN - Apply fail-op to stencil value - Don't write the pixel (RGBA,Z) -ELSE - IF doing depth test && depth test fails THEN - Apply zfail-op to stencil value - Write RGBA and Z to appropriate buffers - ELSE - Apply zpass-op to stencil value -ENDIF - -*/ - - -/** - * Apply the given stencil operator to the array of stencil values. - * Don't touch stencil[i] if mask[i] is zero. - * Input: n - size of stencil array - * oper - the stencil buffer operator - * face - 0 or 1 for front or back face operation - * stencil - array of stencil values - * mask - array [n] of flag: 1=apply operator, 0=don't apply operator - * Output: stencil - modified values - */ -static void -apply_stencil_op( const GLcontext *ctx, GLenum oper, GLuint face, - GLuint n, GLstencil stencil[], const GLubyte mask[] ) -{ - const GLstencil ref = ctx->Stencil.Ref[face]; - const GLstencil wrtmask = ctx->Stencil.WriteMask[face]; - const GLstencil invmask = (GLstencil) (~wrtmask); - const GLstencil stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1; - GLuint i; - - switch (oper) { - case GL_KEEP: - /* do nothing */ - break; - case GL_ZERO: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - stencil[i] = 0; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - stencil[i] = (GLstencil) (stencil[i] & invmask); - } - } - } - break; - case GL_REPLACE: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - stencil[i] = ref; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - stencil[i] = (GLstencil) ((invmask & s ) | (wrtmask & ref)); - } - } - } - break; - case GL_INCR: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - if (s < stencilMax) { - stencil[i] = (GLstencil) (s+1); - } - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - /* VERIFY logic of adding 1 to a write-masked value */ - GLstencil s = stencil[i]; - if (s < stencilMax) { - stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s+1))); - } - } - } - } - break; - case GL_DECR: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - if (s>0) { - stencil[i] = (GLstencil) (s-1); - } - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - /* VERIFY logic of subtracting 1 to a write-masked value */ - GLstencil s = stencil[i]; - if (s>0) { - stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s-1))); - } - } - } - } - break; - case GL_INCR_WRAP_EXT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - stencil[i]++; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s+1))); - } - } - } - break; - case GL_DECR_WRAP_EXT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - stencil[i]--; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s-1))); - } - } - } - break; - case GL_INVERT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - stencil[i] = (GLstencil) ~s; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil s = stencil[i]; - stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & ~s)); - } - } - } - break; - default: - _mesa_problem(ctx, "Bad stencil op in apply_stencil_op"); - } -} - - - - -/** - * Apply stencil test to an array of stencil values (before depth buffering). - * Input: face - 0 or 1 for front or back-face polygons - * n - number of pixels in the array - * stencil - array of [n] stencil values - * mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel - * Output: mask - pixels which fail the stencil test will have their - * mask flag set to 0. - * stencil - updated stencil values (where the test passed) - * Return: GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed. - */ -static GLboolean -do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[], - GLubyte mask[] ) -{ - GLubyte fail[MAX_WIDTH]; - GLboolean allfail = GL_FALSE; - GLuint i; - const GLuint valueMask = ctx->Stencil.ValueMask[face]; - const GLstencil r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - GLstencil s; - - ASSERT(n <= MAX_WIDTH); - - /* - * Perform stencil test. The results of this operation are stored - * in the fail[] array: - * IF fail[i] is non-zero THEN - * the stencil fail operator is to be applied - * ELSE - * the stencil fail operator is not to be applied - * ENDIF - */ - switch (ctx->Stencil.Function[face]) { - case GL_NEVER: - /* never pass; always fail */ - for (i=0;i<n;i++) { - if (mask[i]) { - mask[i] = 0; - fail[i] = 1; - } - else { - fail[i] = 0; - } - } - allfail = GL_TRUE; - break; - case GL_LESS: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r < s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_LEQUAL: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r <= s) { - /* pass */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_GREATER: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r > s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_GEQUAL: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r >= s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_EQUAL: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r == s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_NOTEQUAL: - for (i=0;i<n;i++) { - if (mask[i]) { - s = (GLstencil) (stencil[i] & valueMask); - if (r != s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_ALWAYS: - /* always pass */ - for (i=0;i<n;i++) { - fail[i] = 0; - } - break; - default: - _mesa_problem(ctx, "Bad stencil func in gl_stencil_span"); - return 0; - } - - if (ctx->Stencil.FailFunc[face] != GL_KEEP) { - apply_stencil_op( ctx, ctx->Stencil.FailFunc[face], face, n, stencil, fail ); - } - - return !allfail; -} - - -/** - * Compute the zpass/zfail masks by comparing the pre- and post-depth test - * masks. - */ -static INLINE void -compute_pass_fail_masks(GLuint n, const GLubyte origMask[], - const GLubyte newMask[], - GLubyte passMask[], GLubyte failMask[]) -{ - GLuint i; - for (i = 0; i < n; i++) { - ASSERT(newMask[i] == 0 || newMask[i] == 1); - passMask[i] = origMask[i] & newMask[i]; - failMask[i] = origMask[i] & (newMask[i] ^ 1); - } -} - - -/** - * Apply stencil and depth testing to the span of pixels. - * Both software and hardware stencil buffers are acceptable. - * Input: n - number of pixels in the span - * x, y - location of leftmost pixel in span - * z - array [n] of z values - * mask - array [n] of flags (1=test this pixel, 0=skip the pixel) - * Output: mask - array [n] of flags (1=stencil and depth test passed) - * Return: GL_FALSE - all fragments failed the testing - * GL_TRUE - one or more fragments passed the testing - * - */ -static GLboolean -stencil_and_ztest_span(GLcontext *ctx, SWspan *span, GLuint face) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - GLstencil stencilRow[MAX_WIDTH]; - GLstencil *stencil; - const GLuint n = span->end; - const GLint x = span->x; - const GLint y = span->y; - GLubyte *mask = span->array->mask; - - ASSERT((span->arrayMask & SPAN_XY) == 0); - ASSERT(ctx->Stencil.Enabled); - ASSERT(n <= MAX_WIDTH); -#ifdef DEBUG - if (ctx->Depth.Test) { - ASSERT(span->arrayMask & SPAN_Z); - } -#endif - - stencil = (GLstencil *) rb->GetPointer(ctx, rb, x, y); - if (!stencil) { - rb->GetRow(ctx, rb, n, x, y, stencilRow); - stencil = stencilRow; - } - - /* - * Apply the stencil test to the fragments. - * failMask[i] is 1 if the stencil test failed. - */ - if (do_stencil_test( ctx, face, n, stencil, mask ) == GL_FALSE) { - /* all fragments failed the stencil test, we're done. */ - span->writeAll = GL_FALSE; - if (!rb->GetPointer(ctx, rb, 0, 0)) { - /* put updated stencil values into buffer */ - rb->PutRow(ctx, rb, n, x, y, stencil, NULL); - } - return GL_FALSE; - } - - /* - * Some fragments passed the stencil test, apply depth test to them - * and apply Zpass and Zfail stencil ops. - */ - if (ctx->Depth.Test == GL_FALSE) { - /* - * No depth buffer, just apply zpass stencil function to active pixels. - */ - apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face, n, stencil, mask ); - } - else { - /* - * Perform depth buffering, then apply zpass or zfail stencil function. - */ - GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH]; - - /* save the current mask bits */ - memcpy(origMask, mask, n * sizeof(GLubyte)); - - /* apply the depth test */ - _swrast_depth_test_span(ctx, span); - - compute_pass_fail_masks(n, origMask, mask, passMask, failMask); - - /* apply the pass and fail operations */ - if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { - apply_stencil_op( ctx, ctx->Stencil.ZFailFunc[face], face, - n, stencil, failMask ); - } - if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { - apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face, - n, stencil, passMask ); - } - } - - /* - * Write updated stencil values back into hardware stencil buffer. - */ - if (!rb->GetPointer(ctx, rb, 0, 0)) { - rb->PutRow(ctx, rb, n, x, y, stencil, NULL); - } - - span->writeAll = GL_FALSE; - - return GL_TRUE; /* one or more fragments passed both tests */ -} - - - -/* - * Return the address of a stencil buffer value given the window coords: - */ -#define STENCIL_ADDRESS(X, Y) (stencilStart + (Y) * stride + (X)) - - - -/** - * Apply the given stencil operator for each pixel in the array whose - * mask flag is set. - * \note This is for software stencil buffers only. - * Input: n - number of pixels in the span - * x, y - array of [n] pixels - * operator - the stencil buffer operator - * mask - array [n] of flag: 1=apply operator, 0=don't apply operator - */ -static void -apply_stencil_op_to_pixels( GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLenum oper, GLuint face, const GLubyte mask[] ) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - const GLstencil stencilMax = (1 << fb->Visual.stencilBits) - 1; - const GLstencil ref = ctx->Stencil.Ref[face]; - const GLstencil wrtmask = ctx->Stencil.WriteMask[face]; - const GLstencil invmask = (GLstencil) (~wrtmask); - GLuint i; - GLstencil *stencilStart = (GLubyte *) rb->Data; - const GLuint stride = rb->Width; - - ASSERT(rb->GetPointer(ctx, rb, 0, 0)); - ASSERT(sizeof(GLstencil) == 1); - - switch (oper) { - case GL_KEEP: - /* do nothing */ - break; - case GL_ZERO: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = 0; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) (invmask & *sptr); - } - } - } - break; - case GL_REPLACE: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = ref; - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) ((invmask & *sptr ) | (wrtmask & ref)); - } - } - } - break; - case GL_INCR: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - if (*sptr < stencilMax) { - *sptr = (GLstencil) (*sptr + 1); - } - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - if (*sptr < stencilMax) { - *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr+1))); - } - } - } - } - break; - case GL_DECR: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - if (*sptr>0) { - *sptr = (GLstencil) (*sptr - 1); - } - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - if (*sptr>0) { - *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr-1))); - } - } - } - } - break; - case GL_INCR_WRAP_EXT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) (*sptr + 1); - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr+1))); - } - } - } - break; - case GL_DECR_WRAP_EXT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) (*sptr - 1); - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr-1))); - } - } - } - break; - case GL_INVERT: - if (invmask==0) { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) (~*sptr); - } - } - } - else { - for (i=0;i<n;i++) { - if (mask[i]) { - GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] ); - *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & ~*sptr)); - } - } - } - break; - default: - _mesa_problem(ctx, "Bad stencilop in apply_stencil_op_to_pixels"); - } -} - - - -/** - * Apply stencil test to an array of pixels before depth buffering. - * - * \note Used for software stencil buffer only. - * Input: n - number of pixels in the span - * x, y - array of [n] pixels to stencil - * mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel - * Output: mask - pixels which fail the stencil test will have their - * mask flag set to 0. - * \return GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed. - */ -static GLboolean -stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, - const GLint x[], const GLint y[], GLubyte mask[] ) -{ - const struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - GLubyte fail[MAX_WIDTH]; - GLstencil r, s; - GLuint i; - GLboolean allfail = GL_FALSE; - const GLuint valueMask = ctx->Stencil.ValueMask[face]; - const GLstencil *stencilStart = (GLstencil *) rb->Data; - const GLuint stride = rb->Width; - - ASSERT(rb->GetPointer(ctx, rb, 0, 0)); - ASSERT(sizeof(GLstencil) == 1); - - /* - * Perform stencil test. The results of this operation are stored - * in the fail[] array: - * IF fail[i] is non-zero THEN - * the stencil fail operator is to be applied - * ELSE - * the stencil fail operator is not to be applied - * ENDIF - */ - - switch (ctx->Stencil.Function[face]) { - case GL_NEVER: - /* always fail */ - for (i=0;i<n;i++) { - if (mask[i]) { - mask[i] = 0; - fail[i] = 1; - } - else { - fail[i] = 0; - } - } - allfail = GL_TRUE; - break; - case GL_LESS: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r < s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_LEQUAL: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r <= s) { - /* pass */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_GREATER: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r > s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_GEQUAL: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r >= s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_EQUAL: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r == s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_NOTEQUAL: - r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); - for (i=0;i<n;i++) { - if (mask[i]) { - const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]); - s = (GLstencil) (*sptr & valueMask); - if (r != s) { - /* passed */ - fail[i] = 0; - } - else { - fail[i] = 1; - mask[i] = 0; - } - } - else { - fail[i] = 0; - } - } - break; - case GL_ALWAYS: - /* always pass */ - for (i=0;i<n;i++) { - fail[i] = 0; - } - break; - default: - _mesa_problem(ctx, "Bad stencil func in gl_stencil_pixels"); - return 0; - } - - if (ctx->Stencil.FailFunc[face] != GL_KEEP) { - apply_stencil_op_to_pixels( ctx, n, x, y, ctx->Stencil.FailFunc[face], - face, fail ); - } - - return !allfail; -} - - - - -/** - * Apply stencil and depth testing to an array of pixels. - * This is used both for software and hardware stencil buffers. - * - * The comments in this function are a bit sparse but the code is - * almost identical to stencil_and_ztest_span(), which is well - * commented. - * - * Input: n - number of pixels in the array - * x, y - array of [n] pixel positions - * z - array [n] of z values - * mask - array [n] of flags (1=test this pixel, 0=skip the pixel) - * Output: mask - array [n] of flags (1=stencil and depth test passed) - * Return: GL_FALSE - all fragments failed the testing - * GL_TRUE - one or more fragments passed the testing - */ -static GLboolean -stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face ) -{ - GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH]; - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - const GLuint n = span->end; - const GLint *x = span->array->x; - const GLint *y = span->array->y; - GLubyte *mask = span->array->mask; - - ASSERT(span->arrayMask & SPAN_XY); - ASSERT(ctx->Stencil.Enabled); - ASSERT(n <= MAX_WIDTH); - - if (!rb->GetPointer(ctx, rb, 0, 0)) { - /* No direct access */ - GLstencil stencil[MAX_WIDTH]; - - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - _swrast_get_values(ctx, rb, n, x, y, stencil, sizeof(GLubyte)); - - memcpy(origMask, mask, n * sizeof(GLubyte)); - - (void) do_stencil_test(ctx, face, n, stencil, mask); - - if (ctx->Depth.Test == GL_FALSE) { - apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face, - n, stencil, mask); - } - else { - GLubyte tmpMask[MAX_WIDTH]; - memcpy(tmpMask, mask, n * sizeof(GLubyte)); - - _swrast_depth_test_span(ctx, span); - - compute_pass_fail_masks(n, tmpMask, mask, passMask, failMask); - - if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { - apply_stencil_op(ctx, ctx->Stencil.ZFailFunc[face], face, - n, stencil, failMask); - } - if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { - apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face, - n, stencil, passMask); - } - } - - /* Write updated stencil values into hardware stencil buffer */ - rb->PutValues(ctx, rb, n, x, y, stencil, origMask); - - return GL_TRUE; - } - else { - /* Direct access to stencil buffer */ - - if (stencil_test_pixels(ctx, face, n, x, y, mask) == GL_FALSE) { - /* all fragments failed the stencil test, we're done. */ - return GL_FALSE; - } - - if (ctx->Depth.Test==GL_FALSE) { - apply_stencil_op_to_pixels(ctx, n, x, y, - ctx->Stencil.ZPassFunc[face], face, mask); - } - else { - memcpy(origMask, mask, n * sizeof(GLubyte)); - - _swrast_depth_test_span(ctx, span); - - compute_pass_fail_masks(n, origMask, mask, passMask, failMask); - - if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { - apply_stencil_op_to_pixels(ctx, n, x, y, - ctx->Stencil.ZFailFunc[face], - face, failMask); - } - if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { - apply_stencil_op_to_pixels(ctx, n, x, y, - ctx->Stencil.ZPassFunc[face], - face, passMask); - } - } - - return GL_TRUE; /* one or more fragments passed both tests */ - } -} - - -/** - * /return GL_TRUE = one or more fragments passed, - * GL_FALSE = all fragments failed. - */ -GLboolean -_swrast_stencil_and_ztest_span(GLcontext *ctx, SWspan *span) -{ - const GLuint face = (span->facing == 0) ? 0 : ctx->Stencil._BackFace; - - if (span->arrayMask & SPAN_XY) - return stencil_and_ztest_pixels(ctx, span, face); - else - return stencil_and_ztest_span(ctx, span, face); -} - - -#if 0 -GLuint -clip_span(GLuint bufferWidth, GLuint bufferHeight, - GLint x, GLint y, GLuint *count) -{ - GLuint n = *count; - GLuint skipPixels = 0; - - if (y < 0 || y >= bufferHeight || x + n <= 0 || x >= bufferWidth) { - /* totally out of bounds */ - n = 0; - } - else { - /* left clip */ - if (x < 0) { - skipPixels = -x; - x = 0; - n -= skipPixels; - } - /* right clip */ - if (x + n > bufferWidth) { - GLint dx = x + n - bufferWidth; - n -= dx; - } - } - - *count = n; - - return skipPixels; -} -#endif - - -/** - * Return a span of stencil values from the stencil buffer. - * Used for glRead/CopyPixels - * Input: n - how many pixels - * x,y - location of first pixel - * Output: stencil - the array of stencil values - */ -void -_swrast_read_stencil_span(GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLstencil stencil[]) -{ - if (y < 0 || y >= (GLint) rb->Height || - x + n <= 0 || x >= (GLint) rb->Width) { - /* span is completely outside framebuffer */ - return; /* undefined values OK */ - } - - if (x < 0) { - GLint dx = -x; - x = 0; - n -= dx; - stencil += dx; - } - if (x + n > (GLint) rb->Width) { - GLint dx = x + n - rb->Width; - n -= dx; - } - if (n <= 0) { - return; - } - - rb->GetRow(ctx, rb, n, x, y, stencil); -} - - - -/** - * Write a span of stencil values to the stencil buffer. This function - * applies the stencil write mask when needed. - * Used for glDraw/CopyPixels - * Input: n - how many pixels - * x, y - location of first pixel - * stencil - the array of stencil values - */ -void -_swrast_write_stencil_span(GLcontext *ctx, GLint n, GLint x, GLint y, - const GLstencil stencil[] ) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - struct gl_renderbuffer *rb = fb->_StencilBuffer; - const GLuint stencilMax = (1 << fb->Visual.stencilBits) - 1; - const GLuint stencilMask = ctx->Stencil.WriteMask[0]; - - if (y < 0 || y >= (GLint) rb->Height || - x + n <= 0 || x >= (GLint) rb->Width) { - /* span is completely outside framebuffer */ - return; /* undefined values OK */ - } - if (x < 0) { - GLint dx = -x; - x = 0; - n -= dx; - stencil += dx; - } - if (x + n > (GLint) rb->Width) { - GLint dx = x + n - rb->Width; - n -= dx; - } - if (n <= 0) { - return; - } - - if ((stencilMask & stencilMax) != stencilMax) { - /* need to apply writemask */ - GLstencil destVals[MAX_WIDTH], newVals[MAX_WIDTH]; - GLint i; - rb->GetRow(ctx, rb, n, x, y, destVals); - for (i = 0; i < n; i++) { - newVals[i] - = (stencil[i] & stencilMask) | (destVals[i] & ~stencilMask); - } - rb->PutRow(ctx, rb, n, x, y, newVals, NULL); - } - else { - rb->PutRow(ctx, rb, n, x, y, stencil, NULL); - } -} - - - -/** - * Clear the stencil buffer. - */ -void -_swrast_clear_stencil_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ) -{ - const GLubyte stencilBits = ctx->DrawBuffer->Visual.stencilBits; - const GLuint mask = ctx->Stencil.WriteMask[0]; - const GLuint invMask = ~mask; - const GLuint clearVal = (ctx->Stencil.Clear & mask); - const GLuint stencilMax = (1 << stencilBits) - 1; - GLint x, y, width, height; - - if (!rb || mask == 0) - return; - - ASSERT(rb->DataType == GL_UNSIGNED_BYTE || - rb->DataType == GL_UNSIGNED_SHORT); - - ASSERT(rb->_BaseFormat == GL_STENCIL_INDEX); - - /* compute region to clear */ - x = ctx->DrawBuffer->_Xmin; - y = ctx->DrawBuffer->_Ymin; - width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; - - if (rb->GetPointer(ctx, rb, 0, 0)) { - /* Direct buffer access */ - if ((mask & stencilMax) != stencilMax) { - /* need to mask the clear */ - if (rb->DataType == GL_UNSIGNED_BYTE) { - GLint i, j; - for (i = 0; i < height; i++) { - GLubyte *stencil = (GLubyte*) rb->GetPointer(ctx, rb, x, y + i); - for (j = 0; j < width; j++) { - stencil[j] = (stencil[j] & invMask) | clearVal; - } - } - } - else { - GLint i, j; - for (i = 0; i < height; i++) { - GLushort *stencil = (GLushort*) rb->GetPointer(ctx, rb, x, y + i); - for (j = 0; j < width; j++) { - stencil[j] = (stencil[j] & invMask) | clearVal; - } - } - } - } - else { - /* no bit masking */ - if (width == (GLint) rb->Width && rb->DataType == GL_UNSIGNED_BYTE) { - /* optimized case */ - /* Note: bottom-to-top raster assumed! */ - GLubyte *stencil = (GLubyte *) rb->GetPointer(ctx, rb, x, y); - GLuint len = width * height * sizeof(GLubyte); - memset(stencil, clearVal, len); - } - else { - /* general case */ - GLint i; - for (i = 0; i < height; i++) { - GLvoid *stencil = rb->GetPointer(ctx, rb, x, y + i); - if (rb->DataType == GL_UNSIGNED_BYTE) { - memset(stencil, clearVal, width); - } - else { - _mesa_memset16((short unsigned int*) stencil, clearVal, width); - } - } - } - } - } - else { - /* no direct access */ - if ((mask & stencilMax) != stencilMax) { - /* need to mask the clear */ - if (rb->DataType == GL_UNSIGNED_BYTE) { - GLint i, j; - for (i = 0; i < height; i++) { - GLubyte stencil[MAX_WIDTH]; - rb->GetRow(ctx, rb, width, x, y + i, stencil); - for (j = 0; j < width; j++) { - stencil[j] = (stencil[j] & invMask) | clearVal; - } - rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL); - } - } - else { - GLint i, j; - for (i = 0; i < height; i++) { - GLushort stencil[MAX_WIDTH]; - rb->GetRow(ctx, rb, width, x, y + i, stencil); - for (j = 0; j < width; j++) { - stencil[j] = (stencil[j] & invMask) | clearVal; - } - rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL); - } - } - } - else { - /* no bit masking */ - const GLubyte clear8 = (GLubyte) clearVal; - const GLushort clear16 = (GLushort) clearVal; - const void *clear; - GLint i; - if (rb->DataType == GL_UNSIGNED_BYTE) { - clear = &clear8; - } - else { - clear = &clear16; - } - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, clear, NULL); - } - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_stencil.h"
+#include "s_span.h"
+
+
+
+/* Stencil Logic:
+
+IF stencil test fails THEN
+ Apply fail-op to stencil value
+ Don't write the pixel (RGBA,Z)
+ELSE
+ IF doing depth test && depth test fails THEN
+ Apply zfail-op to stencil value
+ Write RGBA and Z to appropriate buffers
+ ELSE
+ Apply zpass-op to stencil value
+ENDIF
+
+*/
+
+
+/**
+ * Apply the given stencil operator to the array of stencil values.
+ * Don't touch stencil[i] if mask[i] is zero.
+ * Input: n - size of stencil array
+ * oper - the stencil buffer operator
+ * face - 0 or 1 for front or back face operation
+ * stencil - array of stencil values
+ * mask - array [n] of flag: 1=apply operator, 0=don't apply operator
+ * Output: stencil - modified values
+ */
+static void
+apply_stencil_op( const struct gl_context *ctx, GLenum oper, GLuint face,
+ GLuint n, GLstencil stencil[], const GLubyte mask[] )
+{
+ const GLstencil ref = ctx->Stencil.Ref[face];
+ const GLstencil wrtmask = ctx->Stencil.WriteMask[face];
+ const GLstencil invmask = (GLstencil) (~wrtmask);
+ const GLstencil stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
+ GLuint i;
+
+ switch (oper) {
+ case GL_KEEP:
+ /* do nothing */
+ break;
+ case GL_ZERO:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ stencil[i] = 0;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ stencil[i] = (GLstencil) (stencil[i] & invmask);
+ }
+ }
+ }
+ break;
+ case GL_REPLACE:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ stencil[i] = ref;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ stencil[i] = (GLstencil) ((invmask & s ) | (wrtmask & ref));
+ }
+ }
+ }
+ break;
+ case GL_INCR:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ if (s < stencilMax) {
+ stencil[i] = (GLstencil) (s+1);
+ }
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ /* VERIFY logic of adding 1 to a write-masked value */
+ GLstencil s = stencil[i];
+ if (s < stencilMax) {
+ stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s+1)));
+ }
+ }
+ }
+ }
+ break;
+ case GL_DECR:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ if (s>0) {
+ stencil[i] = (GLstencil) (s-1);
+ }
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ /* VERIFY logic of subtracting 1 to a write-masked value */
+ GLstencil s = stencil[i];
+ if (s>0) {
+ stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s-1)));
+ }
+ }
+ }
+ }
+ break;
+ case GL_INCR_WRAP_EXT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ stencil[i]++;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s+1)));
+ }
+ }
+ }
+ break;
+ case GL_DECR_WRAP_EXT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ stencil[i]--;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & (s-1)));
+ }
+ }
+ }
+ break;
+ case GL_INVERT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ stencil[i] = (GLstencil) ~s;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil s = stencil[i];
+ stencil[i] = (GLstencil) ((invmask & s) | (wrtmask & ~s));
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad stencil op in apply_stencil_op");
+ }
+}
+
+
+
+
+/**
+ * Apply stencil test to an array of stencil values (before depth buffering).
+ * Input: face - 0 or 1 for front or back-face polygons
+ * n - number of pixels in the array
+ * stencil - array of [n] stencil values
+ * mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel
+ * Output: mask - pixels which fail the stencil test will have their
+ * mask flag set to 0.
+ * stencil - updated stencil values (where the test passed)
+ * Return: GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
+ */
+static GLboolean
+do_stencil_test( struct gl_context *ctx, GLuint face, GLuint n, GLstencil stencil[],
+ GLubyte mask[] )
+{
+ GLubyte fail[MAX_WIDTH];
+ GLboolean allfail = GL_FALSE;
+ GLuint i;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
+ const GLstencil r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ GLstencil s;
+
+ ASSERT(n <= MAX_WIDTH);
+
+ /*
+ * Perform stencil test. The results of this operation are stored
+ * in the fail[] array:
+ * IF fail[i] is non-zero THEN
+ * the stencil fail operator is to be applied
+ * ELSE
+ * the stencil fail operator is not to be applied
+ * ENDIF
+ */
+ switch (ctx->Stencil.Function[face]) {
+ case GL_NEVER:
+ /* never pass; always fail */
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ mask[i] = 0;
+ fail[i] = 1;
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ allfail = GL_TRUE;
+ break;
+ case GL_LESS:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r < s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r <= s) {
+ /* pass */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_GREATER:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r > s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r >= s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_EQUAL:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r == s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ s = (GLstencil) (stencil[i] & valueMask);
+ if (r != s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ /* always pass */
+ for (i=0;i<n;i++) {
+ fail[i] = 0;
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad stencil func in gl_stencil_span");
+ return 0;
+ }
+
+ if (ctx->Stencil.FailFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.FailFunc[face], face, n, stencil, fail );
+ }
+
+ return !allfail;
+}
+
+
+/**
+ * Compute the zpass/zfail masks by comparing the pre- and post-depth test
+ * masks.
+ */
+static INLINE void
+compute_pass_fail_masks(GLuint n, const GLubyte origMask[],
+ const GLubyte newMask[],
+ GLubyte passMask[], GLubyte failMask[])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(newMask[i] == 0 || newMask[i] == 1);
+ passMask[i] = origMask[i] & newMask[i];
+ failMask[i] = origMask[i] & (newMask[i] ^ 1);
+ }
+}
+
+
+/**
+ * Apply stencil and depth testing to the span of pixels.
+ * Both software and hardware stencil buffers are acceptable.
+ * Input: n - number of pixels in the span
+ * x, y - location of leftmost pixel in span
+ * z - array [n] of z values
+ * mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
+ * Output: mask - array [n] of flags (1=stencil and depth test passed)
+ * Return: GL_FALSE - all fragments failed the testing
+ * GL_TRUE - one or more fragments passed the testing
+ *
+ */
+static GLboolean
+stencil_and_ztest_span(struct gl_context *ctx, SWspan *span, GLuint face)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ GLstencil stencilRow[MAX_WIDTH];
+ GLstencil *stencil;
+ const GLuint n = span->end;
+ const GLint x = span->x;
+ const GLint y = span->y;
+ GLubyte *mask = span->array->mask;
+
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+ ASSERT(ctx->Stencil.Enabled);
+ ASSERT(n <= MAX_WIDTH);
+#ifdef DEBUG
+ if (ctx->Depth.Test) {
+ ASSERT(span->arrayMask & SPAN_Z);
+ }
+#endif
+
+ stencil = (GLstencil *) rb->GetPointer(ctx, rb, x, y);
+ if (!stencil) {
+ rb->GetRow(ctx, rb, n, x, y, stencilRow);
+ stencil = stencilRow;
+ }
+
+ /*
+ * Apply the stencil test to the fragments.
+ * failMask[i] is 1 if the stencil test failed.
+ */
+ if (do_stencil_test( ctx, face, n, stencil, mask ) == GL_FALSE) {
+ /* all fragments failed the stencil test, we're done. */
+ span->writeAll = GL_FALSE;
+ if (!rb->GetPointer(ctx, rb, 0, 0)) {
+ /* put updated stencil values into buffer */
+ rb->PutRow(ctx, rb, n, x, y, stencil, NULL);
+ }
+ return GL_FALSE;
+ }
+
+ /*
+ * Some fragments passed the stencil test, apply depth test to them
+ * and apply Zpass and Zfail stencil ops.
+ */
+ if (ctx->Depth.Test == GL_FALSE) {
+ /*
+ * No depth buffer, just apply zpass stencil function to active pixels.
+ */
+ apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face, n, stencil, mask );
+ }
+ else {
+ /*
+ * Perform depth buffering, then apply zpass or zfail stencil function.
+ */
+ GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH];
+
+ /* save the current mask bits */
+ memcpy(origMask, mask, n * sizeof(GLubyte));
+
+ /* apply the depth test */
+ _swrast_depth_test_span(ctx, span);
+
+ compute_pass_fail_masks(n, origMask, mask, passMask, failMask);
+
+ /* apply the pass and fail operations */
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.ZFailFunc[face], face,
+ n, stencil, failMask );
+ }
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face,
+ n, stencil, passMask );
+ }
+ }
+
+ /*
+ * Write updated stencil values back into hardware stencil buffer.
+ */
+ if (!rb->GetPointer(ctx, rb, 0, 0)) {
+ rb->PutRow(ctx, rb, n, x, y, stencil, NULL);
+ }
+
+ span->writeAll = GL_FALSE;
+
+ return GL_TRUE; /* one or more fragments passed both tests */
+}
+
+
+
+/*
+ * Return the address of a stencil buffer value given the window coords:
+ */
+#define STENCIL_ADDRESS(X, Y) (stencilStart + (Y) * stride + (X))
+
+
+
+/**
+ * Apply the given stencil operator for each pixel in the array whose
+ * mask flag is set.
+ * \note This is for software stencil buffers only.
+ * Input: n - number of pixels in the span
+ * x, y - array of [n] pixels
+ * operator - the stencil buffer operator
+ * mask - array [n] of flag: 1=apply operator, 0=don't apply operator
+ */
+static void
+apply_stencil_op_to_pixels( struct gl_context *ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ GLenum oper, GLuint face, const GLubyte mask[] )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ const GLstencil stencilMax = (1 << fb->Visual.stencilBits) - 1;
+ const GLstencil ref = ctx->Stencil.Ref[face];
+ const GLstencil wrtmask = ctx->Stencil.WriteMask[face];
+ const GLstencil invmask = (GLstencil) (~wrtmask);
+ GLuint i;
+ GLstencil *stencilStart = (GLubyte *) rb->Data;
+ const GLuint stride = rb->Width;
+
+ ASSERT(rb->GetPointer(ctx, rb, 0, 0));
+ ASSERT(sizeof(GLstencil) == 1);
+
+ switch (oper) {
+ case GL_KEEP:
+ /* do nothing */
+ break;
+ case GL_ZERO:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = 0;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) (invmask & *sptr);
+ }
+ }
+ }
+ break;
+ case GL_REPLACE:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = ref;
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) ((invmask & *sptr ) | (wrtmask & ref));
+ }
+ }
+ }
+ break;
+ case GL_INCR:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ if (*sptr < stencilMax) {
+ *sptr = (GLstencil) (*sptr + 1);
+ }
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ if (*sptr < stencilMax) {
+ *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr+1)));
+ }
+ }
+ }
+ }
+ break;
+ case GL_DECR:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ if (*sptr>0) {
+ *sptr = (GLstencil) (*sptr - 1);
+ }
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ if (*sptr>0) {
+ *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr-1)));
+ }
+ }
+ }
+ }
+ break;
+ case GL_INCR_WRAP_EXT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) (*sptr + 1);
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr+1)));
+ }
+ }
+ }
+ break;
+ case GL_DECR_WRAP_EXT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) (*sptr - 1);
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & (*sptr-1)));
+ }
+ }
+ }
+ break;
+ case GL_INVERT:
+ if (invmask==0) {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) (~*sptr);
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ *sptr = (GLstencil) ((invmask & *sptr) | (wrtmask & ~*sptr));
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad stencilop in apply_stencil_op_to_pixels");
+ }
+}
+
+
+
+/**
+ * Apply stencil test to an array of pixels before depth buffering.
+ *
+ * \note Used for software stencil buffer only.
+ * Input: n - number of pixels in the span
+ * x, y - array of [n] pixels to stencil
+ * mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel
+ * Output: mask - pixels which fail the stencil test will have their
+ * mask flag set to 0.
+ * \return GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
+ */
+static GLboolean
+stencil_test_pixels( struct gl_context *ctx, GLuint face, GLuint n,
+ const GLint x[], const GLint y[], GLubyte mask[] )
+{
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ GLubyte fail[MAX_WIDTH];
+ GLstencil r, s;
+ GLuint i;
+ GLboolean allfail = GL_FALSE;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
+ const GLstencil *stencilStart = (GLstencil *) rb->Data;
+ const GLuint stride = rb->Width;
+
+ ASSERT(rb->GetPointer(ctx, rb, 0, 0));
+ ASSERT(sizeof(GLstencil) == 1);
+
+ /*
+ * Perform stencil test. The results of this operation are stored
+ * in the fail[] array:
+ * IF fail[i] is non-zero THEN
+ * the stencil fail operator is to be applied
+ * ELSE
+ * the stencil fail operator is not to be applied
+ * ENDIF
+ */
+
+ switch (ctx->Stencil.Function[face]) {
+ case GL_NEVER:
+ /* always fail */
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ mask[i] = 0;
+ fail[i] = 1;
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ allfail = GL_TRUE;
+ break;
+ case GL_LESS:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r < s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_LEQUAL:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r <= s) {
+ /* pass */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_GREATER:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r > s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_GEQUAL:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r >= s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_EQUAL:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r == s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_NOTEQUAL:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ s = (GLstencil) (*sptr & valueMask);
+ if (r != s) {
+ /* passed */
+ fail[i] = 0;
+ }
+ else {
+ fail[i] = 1;
+ mask[i] = 0;
+ }
+ }
+ else {
+ fail[i] = 0;
+ }
+ }
+ break;
+ case GL_ALWAYS:
+ /* always pass */
+ for (i=0;i<n;i++) {
+ fail[i] = 0;
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad stencil func in gl_stencil_pixels");
+ return 0;
+ }
+
+ if (ctx->Stencil.FailFunc[face] != GL_KEEP) {
+ apply_stencil_op_to_pixels( ctx, n, x, y, ctx->Stencil.FailFunc[face],
+ face, fail );
+ }
+
+ return !allfail;
+}
+
+
+
+
+/**
+ * Apply stencil and depth testing to an array of pixels.
+ * This is used both for software and hardware stencil buffers.
+ *
+ * The comments in this function are a bit sparse but the code is
+ * almost identical to stencil_and_ztest_span(), which is well
+ * commented.
+ *
+ * Input: n - number of pixels in the array
+ * x, y - array of [n] pixel positions
+ * z - array [n] of z values
+ * mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
+ * Output: mask - array [n] of flags (1=stencil and depth test passed)
+ * Return: GL_FALSE - all fragments failed the testing
+ * GL_TRUE - one or more fragments passed the testing
+ */
+static GLboolean
+stencil_and_ztest_pixels( struct gl_context *ctx, SWspan *span, GLuint face )
+{
+ GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH];
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ const GLuint n = span->end;
+ const GLint *x = span->array->x;
+ const GLint *y = span->array->y;
+ GLubyte *mask = span->array->mask;
+
+ ASSERT(span->arrayMask & SPAN_XY);
+ ASSERT(ctx->Stencil.Enabled);
+ ASSERT(n <= MAX_WIDTH);
+
+ if (!rb->GetPointer(ctx, rb, 0, 0)) {
+ /* No direct access */
+ GLstencil stencil[MAX_WIDTH];
+
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ _swrast_get_values(ctx, rb, n, x, y, stencil, sizeof(GLubyte));
+
+ memcpy(origMask, mask, n * sizeof(GLubyte));
+
+ (void) do_stencil_test(ctx, face, n, stencil, mask);
+
+ if (ctx->Depth.Test == GL_FALSE) {
+ apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face,
+ n, stencil, mask);
+ }
+ else {
+ GLubyte tmpMask[MAX_WIDTH];
+ memcpy(tmpMask, mask, n * sizeof(GLubyte));
+
+ _swrast_depth_test_span(ctx, span);
+
+ compute_pass_fail_masks(n, tmpMask, mask, passMask, failMask);
+
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ apply_stencil_op(ctx, ctx->Stencil.ZFailFunc[face], face,
+ n, stencil, failMask);
+ }
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face,
+ n, stencil, passMask);
+ }
+ }
+
+ /* Write updated stencil values into hardware stencil buffer */
+ rb->PutValues(ctx, rb, n, x, y, stencil, origMask);
+
+ return GL_TRUE;
+ }
+ else {
+ /* Direct access to stencil buffer */
+
+ if (stencil_test_pixels(ctx, face, n, x, y, mask) == GL_FALSE) {
+ /* all fragments failed the stencil test, we're done. */
+ return GL_FALSE;
+ }
+
+ if (ctx->Depth.Test==GL_FALSE) {
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZPassFunc[face], face, mask);
+ }
+ else {
+ memcpy(origMask, mask, n * sizeof(GLubyte));
+
+ _swrast_depth_test_span(ctx, span);
+
+ compute_pass_fail_masks(n, origMask, mask, passMask, failMask);
+
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZFailFunc[face],
+ face, failMask);
+ }
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZPassFunc[face],
+ face, passMask);
+ }
+ }
+
+ return GL_TRUE; /* one or more fragments passed both tests */
+ }
+}
+
+
+/**
+ * /return GL_TRUE = one or more fragments passed,
+ * GL_FALSE = all fragments failed.
+ */
+GLboolean
+_swrast_stencil_and_ztest_span(struct gl_context *ctx, SWspan *span)
+{
+ const GLuint face = (span->facing == 0) ? 0 : ctx->Stencil._BackFace;
+
+ if (span->arrayMask & SPAN_XY)
+ return stencil_and_ztest_pixels(ctx, span, face);
+ else
+ return stencil_and_ztest_span(ctx, span, face);
+}
+
+
+#if 0
+GLuint
+clip_span(GLuint bufferWidth, GLuint bufferHeight,
+ GLint x, GLint y, GLuint *count)
+{
+ GLuint n = *count;
+ GLuint skipPixels = 0;
+
+ if (y < 0 || y >= bufferHeight || x + n <= 0 || x >= bufferWidth) {
+ /* totally out of bounds */
+ n = 0;
+ }
+ else {
+ /* left clip */
+ if (x < 0) {
+ skipPixels = -x;
+ x = 0;
+ n -= skipPixels;
+ }
+ /* right clip */
+ if (x + n > bufferWidth) {
+ GLint dx = x + n - bufferWidth;
+ n -= dx;
+ }
+ }
+
+ *count = n;
+
+ return skipPixels;
+}
+#endif
+
+
+/**
+ * Return a span of stencil values from the stencil buffer.
+ * Used for glRead/CopyPixels
+ * Input: n - how many pixels
+ * x,y - location of first pixel
+ * Output: stencil - the array of stencil values
+ */
+void
+_swrast_read_stencil_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLstencil stencil[])
+{
+ if (y < 0 || y >= (GLint) rb->Height ||
+ x + n <= 0 || x >= (GLint) rb->Width) {
+ /* span is completely outside framebuffer */
+ return; /* undefined values OK */
+ }
+
+ if (x < 0) {
+ GLint dx = -x;
+ x = 0;
+ n -= dx;
+ stencil += dx;
+ }
+ if (x + n > (GLint) rb->Width) {
+ GLint dx = x + n - rb->Width;
+ n -= dx;
+ }
+ if (n <= 0) {
+ return;
+ }
+
+ rb->GetRow(ctx, rb, n, x, y, stencil);
+}
+
+
+
+/**
+ * Write a span of stencil values to the stencil buffer. This function
+ * applies the stencil write mask when needed.
+ * Used for glDraw/CopyPixels
+ * Input: n - how many pixels
+ * x, y - location of first pixel
+ * stencil - the array of stencil values
+ */
+void
+_swrast_write_stencil_span(struct gl_context *ctx, GLint n, GLint x, GLint y,
+ const GLstencil stencil[] )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ const GLuint stencilMax = (1 << fb->Visual.stencilBits) - 1;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+
+ if (y < 0 || y >= (GLint) rb->Height ||
+ x + n <= 0 || x >= (GLint) rb->Width) {
+ /* span is completely outside framebuffer */
+ return; /* undefined values OK */
+ }
+ if (x < 0) {
+ GLint dx = -x;
+ x = 0;
+ n -= dx;
+ stencil += dx;
+ }
+ if (x + n > (GLint) rb->Width) {
+ GLint dx = x + n - rb->Width;
+ n -= dx;
+ }
+ if (n <= 0) {
+ return;
+ }
+
+ if ((stencilMask & stencilMax) != stencilMax) {
+ /* need to apply writemask */
+ GLstencil destVals[MAX_WIDTH], newVals[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, n, x, y, destVals);
+ for (i = 0; i < n; i++) {
+ newVals[i]
+ = (stencil[i] & stencilMask) | (destVals[i] & ~stencilMask);
+ }
+ rb->PutRow(ctx, rb, n, x, y, newVals, NULL);
+ }
+ else {
+ rb->PutRow(ctx, rb, n, x, y, stencil, NULL);
+ }
+}
+
+
+
+/**
+ * Clear the stencil buffer.
+ */
+void
+_swrast_clear_stencil_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
+{
+ const GLubyte stencilBits = ctx->DrawBuffer->Visual.stencilBits;
+ const GLuint mask = ctx->Stencil.WriteMask[0];
+ const GLuint invMask = ~mask;
+ const GLuint clearVal = (ctx->Stencil.Clear & mask);
+ const GLuint stencilMax = (1 << stencilBits) - 1;
+ GLint x, y, width, height;
+
+ if (!rb || mask == 0)
+ return;
+
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE ||
+ rb->DataType == GL_UNSIGNED_SHORT);
+
+ ASSERT(rb->_BaseFormat == GL_STENCIL_INDEX);
+
+ /* compute region to clear */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* Direct buffer access */
+ if ((mask & stencilMax) != stencilMax) {
+ /* need to mask the clear */
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte *stencil = (GLubyte*) rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLushort *stencil = (GLushort*) rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
+ }
+ }
+ }
+ }
+ else {
+ /* no bit masking */
+ if (width == (GLint) rb->Width && rb->DataType == GL_UNSIGNED_BYTE) {
+ /* optimized case */
+ /* Note: bottom-to-top raster assumed! */
+ GLubyte *stencil = (GLubyte *) rb->GetPointer(ctx, rb, x, y);
+ GLuint len = width * height * sizeof(GLubyte);
+ memset(stencil, clearVal, len);
+ }
+ else {
+ /* general case */
+ GLint i;
+ for (i = 0; i < height; i++) {
+ GLvoid *stencil = rb->GetPointer(ctx, rb, x, y + i);
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ memset(stencil, clearVal, width);
+ }
+ else {
+ _mesa_memset16((short unsigned int*) stencil, clearVal, width);
+ }
+ }
+ }
+ }
+ }
+ else {
+ /* no direct access */
+ if ((mask & stencilMax) != stencilMax) {
+ /* need to mask the clear */
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte stencil[MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, x, y + i, stencil);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
+ }
+ rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL);
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLushort stencil[MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, x, y + i, stencil);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
+ }
+ rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL);
+ }
+ }
+ }
+ else {
+ /* no bit masking */
+ const GLubyte clear8 = (GLubyte) clearVal;
+ const GLushort clear16 = (GLushort) clearVal;
+ const void *clear;
+ GLint i;
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ clear = &clear8;
+ }
+ else {
+ clear = &clear16;
+ }
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clear, NULL);
+ }
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_stencil.h b/mesalib/src/mesa/swrast/s_stencil.h index c076ebbe2..0bcfb799f 100644 --- a/mesalib/src/mesa/swrast/s_stencil.h +++ b/mesalib/src/mesa/swrast/s_stencil.h @@ -1,53 +1,53 @@ -/* - * Mesa 3-D graphics library - * Version: 6.3 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_STENCIL_H -#define S_STENCIL_H - - -#include "main/mtypes.h" -#include "s_span.h" - - - -extern GLboolean -_swrast_stencil_and_ztest_span(GLcontext *ctx, SWspan *span); - - -extern void -_swrast_read_stencil_span(GLcontext *ctx, struct gl_renderbuffer *rb, - GLint n, GLint x, GLint y, GLstencil stencil[]); - - -extern void -_swrast_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y, - const GLstencil stencil[] ); - - -extern void -_swrast_clear_stencil_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_STENCIL_H
+#define S_STENCIL_H
+
+
+#include "main/mtypes.h"
+#include "s_span.h"
+
+
+
+extern GLboolean
+_swrast_stencil_and_ztest_span(struct gl_context *ctx, SWspan *span);
+
+
+extern void
+_swrast_read_stencil_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLstencil stencil[]);
+
+
+extern void
+_swrast_write_stencil_span( struct gl_context *ctx, GLint n, GLint x, GLint y,
+ const GLstencil stencil[] );
+
+
+extern void
+_swrast_clear_stencil_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_texcombine.c b/mesalib/src/mesa/swrast/s_texcombine.c index 2ac0aaa24..672cd77bf 100644 --- a/mesalib/src/mesa/swrast/s_texcombine.c +++ b/mesalib/src/mesa/swrast/s_texcombine.c @@ -1,709 +1,742 @@ -/* - * Mesa 3-D graphics library - * Version: 7.5 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * Copyright (C) 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/image.h" -#include "main/imports.h" -#include "program/prog_instruction.h" - -#include "s_context.h" -#include "s_texcombine.h" - - -/** - * Pointer to array of float[4] - * This type makes the code below more concise and avoids a lot of casting. - */ -typedef float (*float4_array)[4]; - - -/** - * Return array of texels for given unit. - */ -static INLINE float4_array -get_texel_array(SWcontext *swrast, GLuint unit) -{ - return (float4_array) (swrast->TexelBuffer + unit * MAX_WIDTH * 4); -} - - - -/** - * Do texture application for: - * GL_EXT_texture_env_combine - * GL_ARB_texture_env_combine - * GL_EXT_texture_env_dot3 - * GL_ARB_texture_env_dot3 - * GL_ATI_texture_env_combine3 - * GL_NV_texture_env_combine4 - * conventional GL texture env modes - * - * \param ctx rendering context - * \param unit the texture combiner unit - * \param n number of fragments to process (span width) - * \param primary_rgba incoming fragment color array - * \param texelBuffer pointer to texel colors for all texture units - * - * \param rgba incoming/result fragment colors - */ -static void -texture_combine( GLcontext *ctx, GLuint unit, GLuint n, - const float4_array primary_rgba, - const GLfloat *texelBuffer, - GLchan (*rgbaChan)[4] ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]); - const struct gl_tex_env_combine_state *combine = textureUnit->_CurrentCombine; - float4_array argRGB[MAX_COMBINER_TERMS]; - float4_array argA[MAX_COMBINER_TERMS]; - const GLfloat scaleRGB = (GLfloat) (1 << combine->ScaleShiftRGB); - const GLfloat scaleA = (GLfloat) (1 << combine->ScaleShiftA); - const GLuint numArgsRGB = combine->_NumArgsRGB; - const GLuint numArgsA = combine->_NumArgsA; - GLfloat ccolor[MAX_COMBINER_TERMS][MAX_WIDTH][4]; /* temp color buffers */ - GLfloat rgba[MAX_WIDTH][4]; - GLuint i, term; - - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = CHAN_TO_FLOAT(rgbaChan[i][RCOMP]); - rgba[i][GCOMP] = CHAN_TO_FLOAT(rgbaChan[i][GCOMP]); - rgba[i][BCOMP] = CHAN_TO_FLOAT(rgbaChan[i][BCOMP]); - rgba[i][ACOMP] = CHAN_TO_FLOAT(rgbaChan[i][ACOMP]); - } - - /* - printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n", - combine->ModeRGB, - combine->ModeA, - combine->SourceRGB[0], - combine->SourceA[0], - combine->SourceRGB[1], - combine->SourceA[1]); - */ - - /* - * Do operand setup for up to 4 operands. Loop over the terms. - */ - for (term = 0; term < numArgsRGB; term++) { - const GLenum srcRGB = combine->SourceRGB[term]; - const GLenum operandRGB = combine->OperandRGB[term]; - - switch (srcRGB) { - case GL_TEXTURE: - argRGB[term] = get_texel_array(swrast, unit); - break; - case GL_PRIMARY_COLOR: - argRGB[term] = primary_rgba; - break; - case GL_PREVIOUS: - argRGB[term] = rgba; - break; - case GL_CONSTANT: - { - float4_array c = ccolor[term]; - GLfloat red = textureUnit->EnvColor[0]; - GLfloat green = textureUnit->EnvColor[1]; - GLfloat blue = textureUnit->EnvColor[2]; - GLfloat alpha = textureUnit->EnvColor[3]; - for (i = 0; i < n; i++) { - ASSIGN_4V(c[i], red, green, blue, alpha); - } - argRGB[term] = ccolor[term]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - { - float4_array c = ccolor[term]; - for (i = 0; i < n; i++) { - ASSIGN_4V(c[i], 0.0F, 0.0F, 0.0F, 0.0F); - } - argRGB[term] = ccolor[term]; - } - break; - case GL_ONE: - { - float4_array c = ccolor[term]; - for (i = 0; i < n; i++) { - ASSIGN_4V(c[i], 1.0F, 1.0F, 1.0F, 1.0F); - } - argRGB[term] = ccolor[term]; - } - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcRGB - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argRGB[term] = get_texel_array(swrast, srcUnit); - } - } - - if (operandRGB != GL_SRC_COLOR) { - float4_array src = argRGB[term]; - float4_array dst = ccolor[term]; - - /* point to new arg[term] storage */ - argRGB[term] = ccolor[term]; - - switch (operandRGB) { - case GL_ONE_MINUS_SRC_COLOR: - for (i = 0; i < n; i++) { - dst[i][RCOMP] = 1.0F - src[i][RCOMP]; - dst[i][GCOMP] = 1.0F - src[i][GCOMP]; - dst[i][BCOMP] = 1.0F - src[i][BCOMP]; - } - break; - case GL_SRC_ALPHA: - for (i = 0; i < n; i++) { - dst[i][RCOMP] = - dst[i][GCOMP] = - dst[i][BCOMP] = src[i][ACOMP]; - } - break; - case GL_ONE_MINUS_SRC_ALPHA: - for (i = 0; i < n; i++) { - dst[i][RCOMP] = - dst[i][GCOMP] = - dst[i][BCOMP] = 1.0F - src[i][ACOMP]; - } - break; - default: - _mesa_problem(ctx, "Bad operandRGB"); - } - } - } - - /* - * Set up the argA[term] pointers - */ - for (term = 0; term < numArgsA; term++) { - const GLenum srcA = combine->SourceA[term]; - const GLenum operandA = combine->OperandA[term]; - - switch (srcA) { - case GL_TEXTURE: - argA[term] = get_texel_array(swrast, unit); - break; - case GL_PRIMARY_COLOR: - argA[term] = primary_rgba; - break; - case GL_PREVIOUS: - argA[term] = rgba; - break; - case GL_CONSTANT: - { - float4_array c = ccolor[term]; - GLfloat alpha = textureUnit->EnvColor[3]; - for (i = 0; i < n; i++) - c[i][ACOMP] = alpha; - argA[term] = ccolor[term]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - { - float4_array c = ccolor[term]; - for (i = 0; i < n; i++) - c[i][ACOMP] = 0.0F; - argA[term] = ccolor[term]; - } - break; - case GL_ONE: - { - float4_array c = ccolor[term]; - for (i = 0; i < n; i++) - c[i][ACOMP] = 1.0F; - argA[term] = ccolor[term]; - } - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcA - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argA[term] = get_texel_array(swrast, srcUnit); - } - } - - if (operandA == GL_ONE_MINUS_SRC_ALPHA) { - float4_array src = argA[term]; - float4_array dst = ccolor[term]; - argA[term] = ccolor[term]; - for (i = 0; i < n; i++) { - dst[i][ACOMP] = 1.0F - src[i][ACOMP]; - } - } - } - - /* RGB channel combine */ - { - float4_array arg0 = argRGB[0]; - float4_array arg1 = argRGB[1]; - float4_array arg2 = argRGB[2]; - float4_array arg3 = argRGB[3]; - - switch (combine->ModeRGB) { - case GL_REPLACE: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = arg0[i][RCOMP] * scaleRGB; - rgba[i][GCOMP] = arg0[i][GCOMP] * scaleRGB; - rgba[i][BCOMP] = arg0[i][BCOMP] * scaleRGB; - } - break; - case GL_MODULATE: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * scaleRGB; - rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * scaleRGB; - rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * scaleRGB; - } - break; - case GL_ADD: - if (textureUnit->EnvMode == GL_COMBINE4_NV) { - /* (a * b) + (c * d) */ - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] + - arg2[i][RCOMP] * arg3[i][RCOMP]) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] + - arg2[i][GCOMP] * arg3[i][GCOMP]) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] + - arg2[i][BCOMP] * arg3[i][BCOMP]) * scaleRGB; - } - } - else { - /* 2-term addition */ - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * scaleRGB; - } - } - break; - case GL_ADD_SIGNED: - if (textureUnit->EnvMode == GL_COMBINE4_NV) { - /* (a * b) + (c * d) - 0.5 */ - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] + - arg2[i][RCOMP] * arg3[i][RCOMP] - 0.5F) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] + - arg2[i][GCOMP] * arg3[i][GCOMP] - 0.5F) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] + - arg2[i][BCOMP] * arg3[i][BCOMP] - 0.5F) * scaleRGB; - } - } - else { - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5F) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5F) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5F) * scaleRGB; - } - } - break; - case GL_INTERPOLATE: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] + - arg1[i][RCOMP] * (1.0F - arg2[i][RCOMP])) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] + - arg1[i][GCOMP] * (1.0F - arg2[i][GCOMP])) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] + - arg1[i][BCOMP] * (1.0F - arg2[i][BCOMP])) * scaleRGB; - } - break; - case GL_SUBTRACT: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * scaleRGB; - rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * scaleRGB; - rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * scaleRGB; - } - break; - case GL_DOT3_RGB_EXT: - case GL_DOT3_RGBA_EXT: - /* Do not scale the result by 1 2 or 4 */ - for (i = 0; i < n; i++) { - GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) + - (arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) + - (arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F)) - * 4.0F; - dot = CLAMP(dot, 0.0F, 1.0F); - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot; - } - break; - case GL_DOT3_RGB: - case GL_DOT3_RGBA: - /* DO scale the result by 1 2 or 4 */ - for (i = 0; i < n; i++) { - GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) + - (arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) + - (arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F)) - * 4.0F * scaleRGB; - dot = CLAMP(dot, 0.0F, 1.0F); - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot; - } - break; - case GL_MODULATE_ADD_ATI: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + - arg1[i][RCOMP]) * scaleRGB; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + - arg1[i][GCOMP]) * scaleRGB; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + - arg1[i][BCOMP]) * scaleRGB; - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + - arg1[i][RCOMP] - 0.5F) * scaleRGB; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + - arg1[i][GCOMP] - 0.5F) * scaleRGB; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + - arg1[i][BCOMP] - 0.5F) * scaleRGB; - } - break; - case GL_MODULATE_SUBTRACT_ATI: - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) - - arg1[i][RCOMP]) * scaleRGB; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) - - arg1[i][GCOMP]) * scaleRGB; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) - - arg1[i][BCOMP]) * scaleRGB; - } - break; - case GL_BUMP_ENVMAP_ATI: - /* this produces a fixed rgba color, and the coord calc is done elsewhere */ - for (i = 0; i < n; i++) { - /* rgba result is 0,0,0,1 */ - rgba[i][RCOMP] = 0.0; - rgba[i][GCOMP] = 0.0; - rgba[i][BCOMP] = 0.0; - rgba[i][ACOMP] = 1.0; - } - return; /* no alpha processing */ - default: - _mesa_problem(ctx, "invalid combine mode"); - } - } - - /* Alpha channel combine */ - { - float4_array arg0 = argA[0]; - float4_array arg1 = argA[1]; - float4_array arg2 = argA[2]; - float4_array arg3 = argA[3]; - - switch (combine->ModeA) { - case GL_REPLACE: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = arg0[i][ACOMP] * scaleA; - } - break; - case GL_MODULATE: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * scaleA; - } - break; - case GL_ADD: - if (textureUnit->EnvMode == GL_COMBINE4_NV) { - /* (a * b) + (c * d) */ - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] + - arg2[i][ACOMP] * arg3[i][ACOMP]) * scaleA; - } - } - else { - /* two-term add */ - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * scaleA; - } - } - break; - case GL_ADD_SIGNED: - if (textureUnit->EnvMode == GL_COMBINE4_NV) { - /* (a * b) + (c * d) - 0.5 */ - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] + - arg2[i][ACOMP] * arg3[i][ACOMP] - - 0.5F) * scaleA; - } - } - else { - /* a + b - 0.5 */ - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * scaleA; - } - } - break; - case GL_INTERPOLATE: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] + - arg1[i][ACOMP] * (1.0F - arg2[i][ACOMP])) - * scaleA; - } - break; - case GL_SUBTRACT: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * scaleA; - } - break; - case GL_MODULATE_ADD_ATI: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - + arg1[i][ACOMP]) * scaleA; - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + - arg1[i][ACOMP] - 0.5F) * scaleA; - } - break; - case GL_MODULATE_SUBTRACT_ATI: - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - - arg1[i][ACOMP]) * scaleA; - } - break; - default: - _mesa_problem(ctx, "invalid combine mode"); - } - } - - /* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining. - * This is kind of a kludge. It would have been better if the spec - * were written such that the GL_COMBINE_ALPHA value could be set to - * GL_DOT3. - */ - if (combine->ModeRGB == GL_DOT3_RGBA_EXT || - combine->ModeRGB == GL_DOT3_RGBA) { - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = rgba[i][RCOMP]; - } - } - - for (i = 0; i < n; i++) { - UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][RCOMP], rgba[i][RCOMP]); - UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][GCOMP], rgba[i][GCOMP]); - UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][BCOMP], rgba[i][BCOMP]); - UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][ACOMP], rgba[i][ACOMP]); - } -} - - -/** - * Apply X/Y/Z/W/0/1 swizzle to an array of colors/texels. - * See GL_EXT_texture_swizzle. - */ -static void -swizzle_texels(GLuint swizzle, GLuint count, float4_array texels) -{ - const GLuint swzR = GET_SWZ(swizzle, 0); - const GLuint swzG = GET_SWZ(swizzle, 1); - const GLuint swzB = GET_SWZ(swizzle, 2); - const GLuint swzA = GET_SWZ(swizzle, 3); - GLfloat vector[6]; - GLuint i; - - vector[SWIZZLE_ZERO] = 0; - vector[SWIZZLE_ONE] = 1.0F; - - for (i = 0; i < count; i++) { - vector[SWIZZLE_X] = texels[i][0]; - vector[SWIZZLE_Y] = texels[i][1]; - vector[SWIZZLE_Z] = texels[i][2]; - vector[SWIZZLE_W] = texels[i][3]; - texels[i][RCOMP] = vector[swzR]; - texels[i][GCOMP] = vector[swzG]; - texels[i][BCOMP] = vector[swzB]; - texels[i][ACOMP] = vector[swzA]; - } -} - - -/** - * Apply texture mapping to a span of fragments. - */ -void -_swrast_texture_span( GLcontext *ctx, SWspan *span ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLfloat primary_rgba[MAX_WIDTH][4]; - GLuint unit; - - ASSERT(span->end <= MAX_WIDTH); - - /* - * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR) - */ - if (swrast->_TextureCombinePrimary) { - GLuint i; - for (i = 0; i < span->end; i++) { - primary_rgba[i][RCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]); - primary_rgba[i][GCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]); - primary_rgba[i][BCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]); - primary_rgba[i][ACOMP] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]); - } - } - - /* First must sample all bump maps */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - - if (texUnit->_ReallyEnabled && - texUnit->_CurrentCombine->ModeRGB == GL_BUMP_ENVMAP_ATI) { - const GLfloat (*texcoords)[4] = (const GLfloat (*)[4]) - span->array->attribs[FRAG_ATTRIB_TEX0 + unit]; - float4_array targetcoords = - span->array->attribs[FRAG_ATTRIB_TEX0 + - ctx->Texture.Unit[unit].BumpTarget - GL_TEXTURE0]; - - const struct gl_texture_object *curObj = texUnit->_Current; - GLfloat *lambda = span->array->lambda[unit]; - float4_array texels = get_texel_array(swrast, unit); - GLuint i; - GLfloat rotMatrix00 = ctx->Texture.Unit[unit].RotMatrix[0]; - GLfloat rotMatrix01 = ctx->Texture.Unit[unit].RotMatrix[1]; - GLfloat rotMatrix10 = ctx->Texture.Unit[unit].RotMatrix[2]; - GLfloat rotMatrix11 = ctx->Texture.Unit[unit].RotMatrix[3]; - - /* adjust texture lod (lambda) */ - if (span->arrayMask & SPAN_LAMBDA) { - if (texUnit->LodBias + curObj->LodBias != 0.0F) { - /* apply LOD bias, but don't clamp yet */ - const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias, - -ctx->Const.MaxTextureLodBias, - ctx->Const.MaxTextureLodBias); - GLuint i; - for (i = 0; i < span->end; i++) { - lambda[i] += bias; - } - } - - if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) { - /* apply LOD clamping to lambda */ - const GLfloat min = curObj->MinLod; - const GLfloat max = curObj->MaxLod; - GLuint i; - for (i = 0; i < span->end; i++) { - GLfloat l = lambda[i]; - lambda[i] = CLAMP(l, min, max); - } - } - } - - /* Sample the texture (span->end = number of fragments) */ - swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end, - texcoords, lambda, texels ); - - /* manipulate the span values of the bump target - not sure this can work correctly even ignoring - the problem that channel is unsigned */ - for (i = 0; i < span->end; i++) { - targetcoords[i][0] += (texels[i][0] * rotMatrix00 + texels[i][1] * - rotMatrix01) / targetcoords[i][3]; - targetcoords[i][1] += (texels[i][0] * rotMatrix10 + texels[i][1] * - rotMatrix11) / targetcoords[i][3]; - } - } - } - - /* - * Must do all texture sampling before combining in order to - * accomodate GL_ARB_texture_env_crossbar. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - if (texUnit->_ReallyEnabled && - texUnit->_CurrentCombine->ModeRGB != GL_BUMP_ENVMAP_ATI) { - const GLfloat (*texcoords)[4] = (const GLfloat (*)[4]) - span->array->attribs[FRAG_ATTRIB_TEX0 + unit]; - const struct gl_texture_object *curObj = texUnit->_Current; - GLfloat *lambda = span->array->lambda[unit]; - float4_array texels = get_texel_array(swrast, unit); - - /* adjust texture lod (lambda) */ - if (span->arrayMask & SPAN_LAMBDA) { - if (texUnit->LodBias + curObj->LodBias != 0.0F) { - /* apply LOD bias, but don't clamp yet */ - const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias, - -ctx->Const.MaxTextureLodBias, - ctx->Const.MaxTextureLodBias); - GLuint i; - for (i = 0; i < span->end; i++) { - lambda[i] += bias; - } - } - - if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) { - /* apply LOD clamping to lambda */ - const GLfloat min = curObj->MinLod; - const GLfloat max = curObj->MaxLod; - GLuint i; - for (i = 0; i < span->end; i++) { - GLfloat l = lambda[i]; - lambda[i] = CLAMP(l, min, max); - } - } - } - - /* Sample the texture (span->end = number of fragments) */ - swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end, - texcoords, lambda, texels ); - - /* GL_SGI_texture_color_table */ - if (texUnit->ColorTableEnabled) { - _mesa_lookup_rgba_float(&texUnit->ColorTable, span->end, texels); - } - - /* GL_EXT_texture_swizzle */ - if (curObj->_Swizzle != SWIZZLE_NOOP) { - swizzle_texels(curObj->_Swizzle, span->end, texels); - } - } - } - - /* - * OK, now apply the texture (aka texture combine/blend). - * We modify the span->color.rgba values. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - if (ctx->Texture.Unit[unit]._ReallyEnabled) { - texture_combine( ctx, unit, span->end, - primary_rgba, - swrast->TexelBuffer, - span->array->rgba ); - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/pixeltransfer.h"
+#include "program/prog_instruction.h"
+
+#include "s_context.h"
+#include "s_texcombine.h"
+
+
+/**
+ * Pointer to array of float[4]
+ * This type makes the code below more concise and avoids a lot of casting.
+ */
+typedef float (*float4_array)[4];
+
+
+/**
+ * Return array of texels for given unit.
+ */
+static INLINE float4_array
+get_texel_array(SWcontext *swrast, GLuint unit)
+{
+ return (float4_array) (swrast->TexelBuffer + unit * MAX_WIDTH * 4);
+}
+
+
+
+/**
+ * Do texture application for:
+ * GL_EXT_texture_env_combine
+ * GL_ARB_texture_env_combine
+ * GL_EXT_texture_env_dot3
+ * GL_ARB_texture_env_dot3
+ * GL_ATI_texture_env_combine3
+ * GL_NV_texture_env_combine4
+ * conventional GL texture env modes
+ *
+ * \param ctx rendering context
+ * \param unit the texture combiner unit
+ * \param n number of fragments to process (span width)
+ * \param primary_rgba incoming fragment color array
+ * \param texelBuffer pointer to texel colors for all texture units
+ *
+ * \param rgba incoming/result fragment colors
+ */
+static void
+texture_combine( struct gl_context *ctx, GLuint unit, GLuint n,
+ const float4_array primary_rgba,
+ const GLfloat *texelBuffer,
+ GLchan (*rgbaChan)[4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]);
+ const struct gl_tex_env_combine_state *combine = textureUnit->_CurrentCombine;
+ float4_array argRGB[MAX_COMBINER_TERMS];
+ float4_array argA[MAX_COMBINER_TERMS];
+ const GLfloat scaleRGB = (GLfloat) (1 << combine->ScaleShiftRGB);
+ const GLfloat scaleA = (GLfloat) (1 << combine->ScaleShiftA);
+ const GLuint numArgsRGB = combine->_NumArgsRGB;
+ const GLuint numArgsA = combine->_NumArgsA;
+ float4_array ccolor[4], rgba;
+ GLuint i, term;
+
+ /* alloc temp pixel buffers */
+ rgba = (float4_array) malloc(4 * n * sizeof(GLfloat));
+ if (!rgba) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
+ return;
+ }
+
+ for (i = 0; i < numArgsRGB || i < numArgsA; i++) {
+ ccolor[i] = (float4_array) malloc(4 * n * sizeof(GLfloat));
+ if (!ccolor[i]) {
+ while (i) {
+ free(ccolor[i]);
+ i--;
+ }
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
+ return;
+ }
+ }
+
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = CHAN_TO_FLOAT(rgbaChan[i][RCOMP]);
+ rgba[i][GCOMP] = CHAN_TO_FLOAT(rgbaChan[i][GCOMP]);
+ rgba[i][BCOMP] = CHAN_TO_FLOAT(rgbaChan[i][BCOMP]);
+ rgba[i][ACOMP] = CHAN_TO_FLOAT(rgbaChan[i][ACOMP]);
+ }
+
+ /*
+ printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n",
+ combine->ModeRGB,
+ combine->ModeA,
+ combine->SourceRGB[0],
+ combine->SourceA[0],
+ combine->SourceRGB[1],
+ combine->SourceA[1]);
+ */
+
+ /*
+ * Do operand setup for up to 4 operands. Loop over the terms.
+ */
+ for (term = 0; term < numArgsRGB; term++) {
+ const GLenum srcRGB = combine->SourceRGB[term];
+ const GLenum operandRGB = combine->OperandRGB[term];
+
+ switch (srcRGB) {
+ case GL_TEXTURE:
+ argRGB[term] = get_texel_array(swrast, unit);
+ break;
+ case GL_PRIMARY_COLOR:
+ argRGB[term] = primary_rgba;
+ break;
+ case GL_PREVIOUS:
+ argRGB[term] = rgba;
+ break;
+ case GL_CONSTANT:
+ {
+ float4_array c = ccolor[term];
+ GLfloat red = textureUnit->EnvColor[0];
+ GLfloat green = textureUnit->EnvColor[1];
+ GLfloat blue = textureUnit->EnvColor[2];
+ GLfloat alpha = textureUnit->EnvColor[3];
+ for (i = 0; i < n; i++) {
+ ASSIGN_4V(c[i], red, green, blue, alpha);
+ }
+ argRGB[term] = ccolor[term];
+ }
+ break;
+ /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
+ */
+ case GL_ZERO:
+ {
+ float4_array c = ccolor[term];
+ for (i = 0; i < n; i++) {
+ ASSIGN_4V(c[i], 0.0F, 0.0F, 0.0F, 0.0F);
+ }
+ argRGB[term] = ccolor[term];
+ }
+ break;
+ case GL_ONE:
+ {
+ float4_array c = ccolor[term];
+ for (i = 0; i < n; i++) {
+ ASSIGN_4V(c[i], 1.0F, 1.0F, 1.0F, 1.0F);
+ }
+ argRGB[term] = ccolor[term];
+ }
+ break;
+ default:
+ /* ARB_texture_env_crossbar source */
+ {
+ const GLuint srcUnit = srcRGB - GL_TEXTURE0;
+ ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
+ if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
+ goto end;
+ argRGB[term] = get_texel_array(swrast, srcUnit);
+ }
+ }
+
+ if (operandRGB != GL_SRC_COLOR) {
+ float4_array src = argRGB[term];
+ float4_array dst = ccolor[term];
+
+ /* point to new arg[term] storage */
+ argRGB[term] = ccolor[term];
+
+ switch (operandRGB) {
+ case GL_ONE_MINUS_SRC_COLOR:
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] = 1.0F - src[i][RCOMP];
+ dst[i][GCOMP] = 1.0F - src[i][GCOMP];
+ dst[i][BCOMP] = 1.0F - src[i][BCOMP];
+ }
+ break;
+ case GL_SRC_ALPHA:
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] =
+ dst[i][GCOMP] =
+ dst[i][BCOMP] = src[i][ACOMP];
+ }
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] =
+ dst[i][GCOMP] =
+ dst[i][BCOMP] = 1.0F - src[i][ACOMP];
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad operandRGB");
+ }
+ }
+ }
+
+ /*
+ * Set up the argA[term] pointers
+ */
+ for (term = 0; term < numArgsA; term++) {
+ const GLenum srcA = combine->SourceA[term];
+ const GLenum operandA = combine->OperandA[term];
+
+ switch (srcA) {
+ case GL_TEXTURE:
+ argA[term] = get_texel_array(swrast, unit);
+ break;
+ case GL_PRIMARY_COLOR:
+ argA[term] = primary_rgba;
+ break;
+ case GL_PREVIOUS:
+ argA[term] = rgba;
+ break;
+ case GL_CONSTANT:
+ {
+ float4_array c = ccolor[term];
+ GLfloat alpha = textureUnit->EnvColor[3];
+ for (i = 0; i < n; i++)
+ c[i][ACOMP] = alpha;
+ argA[term] = ccolor[term];
+ }
+ break;
+ /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
+ */
+ case GL_ZERO:
+ {
+ float4_array c = ccolor[term];
+ for (i = 0; i < n; i++)
+ c[i][ACOMP] = 0.0F;
+ argA[term] = ccolor[term];
+ }
+ break;
+ case GL_ONE:
+ {
+ float4_array c = ccolor[term];
+ for (i = 0; i < n; i++)
+ c[i][ACOMP] = 1.0F;
+ argA[term] = ccolor[term];
+ }
+ break;
+ default:
+ /* ARB_texture_env_crossbar source */
+ {
+ const GLuint srcUnit = srcA - GL_TEXTURE0;
+ ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
+ if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
+ goto end;
+ argA[term] = get_texel_array(swrast, srcUnit);
+ }
+ }
+
+ if (operandA == GL_ONE_MINUS_SRC_ALPHA) {
+ float4_array src = argA[term];
+ float4_array dst = ccolor[term];
+ argA[term] = ccolor[term];
+ for (i = 0; i < n; i++) {
+ dst[i][ACOMP] = 1.0F - src[i][ACOMP];
+ }
+ }
+ }
+
+ /* RGB channel combine */
+ {
+ float4_array arg0 = argRGB[0];
+ float4_array arg1 = argRGB[1];
+ float4_array arg2 = argRGB[2];
+ float4_array arg3 = argRGB[3];
+
+ switch (combine->ModeRGB) {
+ case GL_REPLACE:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = arg0[i][RCOMP] * scaleRGB;
+ rgba[i][GCOMP] = arg0[i][GCOMP] * scaleRGB;
+ rgba[i][BCOMP] = arg0[i][BCOMP] * scaleRGB;
+ }
+ break;
+ case GL_MODULATE:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * scaleRGB;
+ rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * scaleRGB;
+ rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * scaleRGB;
+ }
+ break;
+ case GL_ADD:
+ if (textureUnit->EnvMode == GL_COMBINE4_NV) {
+ /* (a * b) + (c * d) */
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] +
+ arg2[i][RCOMP] * arg3[i][RCOMP]) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] +
+ arg2[i][GCOMP] * arg3[i][GCOMP]) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] +
+ arg2[i][BCOMP] * arg3[i][BCOMP]) * scaleRGB;
+ }
+ }
+ else {
+ /* 2-term addition */
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * scaleRGB;
+ }
+ }
+ break;
+ case GL_ADD_SIGNED:
+ if (textureUnit->EnvMode == GL_COMBINE4_NV) {
+ /* (a * b) + (c * d) - 0.5 */
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] +
+ arg2[i][RCOMP] * arg3[i][RCOMP] - 0.5F) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] +
+ arg2[i][GCOMP] * arg3[i][GCOMP] - 0.5F) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] +
+ arg2[i][BCOMP] * arg3[i][BCOMP] - 0.5F) * scaleRGB;
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5F) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5F) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5F) * scaleRGB;
+ }
+ }
+ break;
+ case GL_INTERPOLATE:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] +
+ arg1[i][RCOMP] * (1.0F - arg2[i][RCOMP])) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] +
+ arg1[i][GCOMP] * (1.0F - arg2[i][GCOMP])) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] +
+ arg1[i][BCOMP] * (1.0F - arg2[i][BCOMP])) * scaleRGB;
+ }
+ break;
+ case GL_SUBTRACT:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * scaleRGB;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * scaleRGB;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * scaleRGB;
+ }
+ break;
+ case GL_DOT3_RGB_EXT:
+ case GL_DOT3_RGBA_EXT:
+ /* Do not scale the result by 1 2 or 4 */
+ for (i = 0; i < n; i++) {
+ GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) +
+ (arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) +
+ (arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F))
+ * 4.0F;
+ dot = CLAMP(dot, 0.0F, 1.0F);
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot;
+ }
+ break;
+ case GL_DOT3_RGB:
+ case GL_DOT3_RGBA:
+ /* DO scale the result by 1 2 or 4 */
+ for (i = 0; i < n; i++) {
+ GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) +
+ (arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) +
+ (arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F))
+ * 4.0F * scaleRGB;
+ dot = CLAMP(dot, 0.0F, 1.0F);
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot;
+ }
+ break;
+ case GL_MODULATE_ADD_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) +
+ arg1[i][RCOMP]) * scaleRGB;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) +
+ arg1[i][GCOMP]) * scaleRGB;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) +
+ arg1[i][BCOMP]) * scaleRGB;
+ }
+ break;
+ case GL_MODULATE_SIGNED_ADD_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) +
+ arg1[i][RCOMP] - 0.5F) * scaleRGB;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) +
+ arg1[i][GCOMP] - 0.5F) * scaleRGB;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) +
+ arg1[i][BCOMP] - 0.5F) * scaleRGB;
+ }
+ break;
+ case GL_MODULATE_SUBTRACT_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) -
+ arg1[i][RCOMP]) * scaleRGB;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) -
+ arg1[i][GCOMP]) * scaleRGB;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) -
+ arg1[i][BCOMP]) * scaleRGB;
+ }
+ break;
+ case GL_BUMP_ENVMAP_ATI:
+ /* this produces a fixed rgba color, and the coord calc is done elsewhere */
+ for (i = 0; i < n; i++) {
+ /* rgba result is 0,0,0,1 */
+ rgba[i][RCOMP] = 0.0;
+ rgba[i][GCOMP] = 0.0;
+ rgba[i][BCOMP] = 0.0;
+ rgba[i][ACOMP] = 1.0;
+ }
+ goto end; /* no alpha processing */
+ default:
+ _mesa_problem(ctx, "invalid combine mode");
+ }
+ }
+
+ /* Alpha channel combine */
+ {
+ float4_array arg0 = argA[0];
+ float4_array arg1 = argA[1];
+ float4_array arg2 = argA[2];
+ float4_array arg3 = argA[3];
+
+ switch (combine->ModeA) {
+ case GL_REPLACE:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = arg0[i][ACOMP] * scaleA;
+ }
+ break;
+ case GL_MODULATE:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * scaleA;
+ }
+ break;
+ case GL_ADD:
+ if (textureUnit->EnvMode == GL_COMBINE4_NV) {
+ /* (a * b) + (c * d) */
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] +
+ arg2[i][ACOMP] * arg3[i][ACOMP]) * scaleA;
+ }
+ }
+ else {
+ /* two-term add */
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * scaleA;
+ }
+ }
+ break;
+ case GL_ADD_SIGNED:
+ if (textureUnit->EnvMode == GL_COMBINE4_NV) {
+ /* (a * b) + (c * d) - 0.5 */
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] +
+ arg2[i][ACOMP] * arg3[i][ACOMP] -
+ 0.5F) * scaleA;
+ }
+ }
+ else {
+ /* a + b - 0.5 */
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * scaleA;
+ }
+ }
+ break;
+ case GL_INTERPOLATE:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] +
+ arg1[i][ACOMP] * (1.0F - arg2[i][ACOMP]))
+ * scaleA;
+ }
+ break;
+ case GL_SUBTRACT:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * scaleA;
+ }
+ break;
+ case GL_MODULATE_ADD_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP])
+ + arg1[i][ACOMP]) * scaleA;
+ }
+ break;
+ case GL_MODULATE_SIGNED_ADD_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) +
+ arg1[i][ACOMP] - 0.5F) * scaleA;
+ }
+ break;
+ case GL_MODULATE_SUBTRACT_ATI:
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP])
+ - arg1[i][ACOMP]) * scaleA;
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "invalid combine mode");
+ }
+ }
+
+ /* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining.
+ * This is kind of a kludge. It would have been better if the spec
+ * were written such that the GL_COMBINE_ALPHA value could be set to
+ * GL_DOT3.
+ */
+ if (combine->ModeRGB == GL_DOT3_RGBA_EXT ||
+ combine->ModeRGB == GL_DOT3_RGBA) {
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = rgba[i][RCOMP];
+ }
+ }
+
+ for (i = 0; i < n; i++) {
+ UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][RCOMP], rgba[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][GCOMP], rgba[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][BCOMP], rgba[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][ACOMP], rgba[i][ACOMP]);
+ }
+
+end:
+ for (i = 0; i < numArgsRGB || i < numArgsA; i++) {
+ free(ccolor[i]);
+ }
+ free(rgba);
+}
+
+
+/**
+ * Apply X/Y/Z/W/0/1 swizzle to an array of colors/texels.
+ * See GL_EXT_texture_swizzle.
+ */
+static void
+swizzle_texels(GLuint swizzle, GLuint count, float4_array texels)
+{
+ const GLuint swzR = GET_SWZ(swizzle, 0);
+ const GLuint swzG = GET_SWZ(swizzle, 1);
+ const GLuint swzB = GET_SWZ(swizzle, 2);
+ const GLuint swzA = GET_SWZ(swizzle, 3);
+ GLfloat vector[6];
+ GLuint i;
+
+ vector[SWIZZLE_ZERO] = 0;
+ vector[SWIZZLE_ONE] = 1.0F;
+
+ for (i = 0; i < count; i++) {
+ vector[SWIZZLE_X] = texels[i][0];
+ vector[SWIZZLE_Y] = texels[i][1];
+ vector[SWIZZLE_Z] = texels[i][2];
+ vector[SWIZZLE_W] = texels[i][3];
+ texels[i][RCOMP] = vector[swzR];
+ texels[i][GCOMP] = vector[swzG];
+ texels[i][BCOMP] = vector[swzB];
+ texels[i][ACOMP] = vector[swzA];
+ }
+}
+
+
+/**
+ * Apply texture mapping to a span of fragments.
+ */
+void
+_swrast_texture_span( struct gl_context *ctx, SWspan *span )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ float4_array primary_rgba;
+ GLuint unit;
+
+ primary_rgba = (float4_array) malloc(span->end * 4 * sizeof(GLfloat));
+
+ if (!primary_rgba) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_span");
+ return;
+ }
+
+ ASSERT(span->end <= MAX_WIDTH);
+
+ /*
+ * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
+ */
+ if (swrast->_TextureCombinePrimary) {
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ primary_rgba[i][RCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]);
+ primary_rgba[i][GCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]);
+ primary_rgba[i][BCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]);
+ primary_rgba[i][ACOMP] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]);
+ }
+ }
+
+ /* First must sample all bump maps */
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+
+ if (texUnit->_ReallyEnabled &&
+ texUnit->_CurrentCombine->ModeRGB == GL_BUMP_ENVMAP_ATI) {
+ const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
+ span->array->attribs[FRAG_ATTRIB_TEX0 + unit];
+ float4_array targetcoords =
+ span->array->attribs[FRAG_ATTRIB_TEX0 +
+ ctx->Texture.Unit[unit].BumpTarget - GL_TEXTURE0];
+
+ const struct gl_texture_object *curObj = texUnit->_Current;
+ GLfloat *lambda = span->array->lambda[unit];
+ float4_array texels = get_texel_array(swrast, unit);
+ GLuint i;
+ GLfloat rotMatrix00 = ctx->Texture.Unit[unit].RotMatrix[0];
+ GLfloat rotMatrix01 = ctx->Texture.Unit[unit].RotMatrix[1];
+ GLfloat rotMatrix10 = ctx->Texture.Unit[unit].RotMatrix[2];
+ GLfloat rotMatrix11 = ctx->Texture.Unit[unit].RotMatrix[3];
+
+ /* adjust texture lod (lambda) */
+ if (span->arrayMask & SPAN_LAMBDA) {
+ if (texUnit->LodBias + curObj->LodBias != 0.0F) {
+ /* apply LOD bias, but don't clamp yet */
+ const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias,
+ -ctx->Const.MaxTextureLodBias,
+ ctx->Const.MaxTextureLodBias);
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ lambda[i] += bias;
+ }
+ }
+
+ if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) {
+ /* apply LOD clamping to lambda */
+ const GLfloat min = curObj->MinLod;
+ const GLfloat max = curObj->MaxLod;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat l = lambda[i];
+ lambda[i] = CLAMP(l, min, max);
+ }
+ }
+ }
+
+ /* Sample the texture (span->end = number of fragments) */
+ swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end,
+ texcoords, lambda, texels );
+
+ /* manipulate the span values of the bump target
+ not sure this can work correctly even ignoring
+ the problem that channel is unsigned */
+ for (i = 0; i < span->end; i++) {
+ targetcoords[i][0] += (texels[i][0] * rotMatrix00 + texels[i][1] *
+ rotMatrix01) / targetcoords[i][3];
+ targetcoords[i][1] += (texels[i][0] * rotMatrix10 + texels[i][1] *
+ rotMatrix11) / targetcoords[i][3];
+ }
+ }
+ }
+
+ /*
+ * Must do all texture sampling before combining in order to
+ * accomodate GL_ARB_texture_env_crossbar.
+ */
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ if (texUnit->_ReallyEnabled &&
+ texUnit->_CurrentCombine->ModeRGB != GL_BUMP_ENVMAP_ATI) {
+ const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
+ span->array->attribs[FRAG_ATTRIB_TEX0 + unit];
+ const struct gl_texture_object *curObj = texUnit->_Current;
+ GLfloat *lambda = span->array->lambda[unit];
+ float4_array texels = get_texel_array(swrast, unit);
+
+ /* adjust texture lod (lambda) */
+ if (span->arrayMask & SPAN_LAMBDA) {
+ if (texUnit->LodBias + curObj->LodBias != 0.0F) {
+ /* apply LOD bias, but don't clamp yet */
+ const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias,
+ -ctx->Const.MaxTextureLodBias,
+ ctx->Const.MaxTextureLodBias);
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ lambda[i] += bias;
+ }
+ }
+
+ if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) {
+ /* apply LOD clamping to lambda */
+ const GLfloat min = curObj->MinLod;
+ const GLfloat max = curObj->MaxLod;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat l = lambda[i];
+ lambda[i] = CLAMP(l, min, max);
+ }
+ }
+ }
+
+ /* Sample the texture (span->end = number of fragments) */
+ swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end,
+ texcoords, lambda, texels );
+
+ /* GL_SGI_texture_color_table */
+ if (texUnit->ColorTableEnabled) {
+ _mesa_lookup_rgba_float(&texUnit->ColorTable, span->end, texels);
+ }
+
+ /* GL_EXT_texture_swizzle */
+ if (curObj->_Swizzle != SWIZZLE_NOOP) {
+ swizzle_texels(curObj->_Swizzle, span->end, texels);
+ }
+ }
+ }
+
+ /*
+ * OK, now apply the texture (aka texture combine/blend).
+ * We modify the span->color.rgba values.
+ */
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ texture_combine( ctx, unit, span->end,
+ primary_rgba,
+ swrast->TexelBuffer,
+ span->array->rgba );
+ }
+ }
+
+ free(primary_rgba);
+}
diff --git a/mesalib/src/mesa/swrast/s_texcombine.h b/mesalib/src/mesa/swrast/s_texcombine.h index 4f5dfbe1a..3897acd69 100644 --- a/mesalib/src/mesa/swrast/s_texcombine.h +++ b/mesalib/src/mesa/swrast/s_texcombine.h @@ -1,36 +1,37 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_TEXCOMBINE_H -#define S_TEXCOMBINE_H - - -#include "main/mtypes.h" -#include "s_span.h" - -extern void -_swrast_texture_span( GLcontext *ctx, SWspan *span ); - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_TEXCOMBINE_H
+#define S_TEXCOMBINE_H
+
+
+#include "s_span.h"
+
+struct gl_context;
+
+extern void
+_swrast_texture_span( struct gl_context *ctx, SWspan *span );
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_texfilter.c b/mesalib/src/mesa/swrast/s_texfilter.c index 3fc554c5a..f39bd8a38 100644 --- a/mesalib/src/mesa/swrast/s_texfilter.c +++ b/mesalib/src/mesa/swrast/s_texfilter.c @@ -1,3300 +1,3312 @@ -/* - * Mesa 3-D graphics library - * Version: 7.3 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/imports.h" -#include "main/texformat.h" - -#include "s_context.h" -#include "s_texfilter.h" - - -/* - * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes - * see 1-pixel bands of improperly weighted linear-filtered textures. - * The tests/texwrap.c demo is a good test. - * Also note, FRAC(x) doesn't truly return the fractional part of x for x < 0. - * Instead, if x < 0 then FRAC(x) = 1 - true_frac(x). - */ -#define FRAC(f) ((f) - IFLOOR(f)) - - - -/** - * Linear interpolation macro - */ -#define LERP(T, A, B) ( (A) + (T) * ((B) - (A)) ) - - -/** - * Do 2D/biliner interpolation of float values. - * v00, v10, v01 and v11 are typically four texture samples in a square/box. - * a and b are the horizontal and vertical interpolants. - * It's important that this function is inlined when compiled with - * optimization! If we find that's not true on some systems, convert - * to a macro. - */ -static INLINE GLfloat -lerp_2d(GLfloat a, GLfloat b, - GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11) -{ - const GLfloat temp0 = LERP(a, v00, v10); - const GLfloat temp1 = LERP(a, v01, v11); - return LERP(b, temp0, temp1); -} - - -/** - * Do 3D/trilinear interpolation of float values. - * \sa lerp_2d - */ -static INLINE GLfloat -lerp_3d(GLfloat a, GLfloat b, GLfloat c, - GLfloat v000, GLfloat v100, GLfloat v010, GLfloat v110, - GLfloat v001, GLfloat v101, GLfloat v011, GLfloat v111) -{ - const GLfloat temp00 = LERP(a, v000, v100); - const GLfloat temp10 = LERP(a, v010, v110); - const GLfloat temp01 = LERP(a, v001, v101); - const GLfloat temp11 = LERP(a, v011, v111); - const GLfloat temp0 = LERP(b, temp00, temp10); - const GLfloat temp1 = LERP(b, temp01, temp11); - return LERP(c, temp0, temp1); -} - - -/** - * Do linear interpolation of colors. - */ -static INLINE void -lerp_rgba(GLfloat result[4], GLfloat t, const GLfloat a[4], const GLfloat b[4]) -{ - result[0] = LERP(t, a[0], b[0]); - result[1] = LERP(t, a[1], b[1]); - result[2] = LERP(t, a[2], b[2]); - result[3] = LERP(t, a[3], b[3]); -} - - -/** - * Do bilinear interpolation of colors. - */ -static INLINE void -lerp_rgba_2d(GLfloat result[4], GLfloat a, GLfloat b, - const GLfloat t00[4], const GLfloat t10[4], - const GLfloat t01[4], const GLfloat t11[4]) -{ - result[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]); - result[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]); - result[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]); - result[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]); -} - - -/** - * Do trilinear interpolation of colors. - */ -static INLINE void -lerp_rgba_3d(GLfloat result[4], GLfloat a, GLfloat b, GLfloat c, - const GLfloat t000[4], const GLfloat t100[4], - const GLfloat t010[4], const GLfloat t110[4], - const GLfloat t001[4], const GLfloat t101[4], - const GLfloat t011[4], const GLfloat t111[4]) -{ - GLuint k; - /* compiler should unroll these short loops */ - for (k = 0; k < 4; k++) { - result[k] = lerp_3d(a, b, c, t000[k], t100[k], t010[k], t110[k], - t001[k], t101[k], t011[k], t111[k]); - } -} - - -/** - * If A is a signed integer, A % B doesn't give the right value for A < 0 - * (in terms of texture repeat). Just casting to unsigned fixes that. - */ -#define REMAINDER(A, B) (((A) + (B) * 1024) % (B)) - - -/** - * Used to compute texel locations for linear sampling. - * Input: - * wrapMode = GL_REPEAT, GL_CLAMP, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_BORDER - * s = texcoord in [0,1] - * size = width (or height or depth) of texture - * Output: - * i0, i1 = returns two nearest texel indexes - * weight = returns blend factor between texels - */ -static INLINE void -linear_texel_locations(GLenum wrapMode, - const struct gl_texture_image *img, - GLint size, GLfloat s, - GLint *i0, GLint *i1, GLfloat *weight) -{ - GLfloat u; - switch (wrapMode) { - case GL_REPEAT: - u = s * size - 0.5F; - if (img->_IsPowerOfTwo) { - *i0 = IFLOOR(u) & (size - 1); - *i1 = (*i0 + 1) & (size - 1); - } - else { - *i0 = REMAINDER(IFLOOR(u), size); - *i1 = REMAINDER(*i0 + 1, size); - } - break; - case GL_CLAMP_TO_EDGE: - if (s <= 0.0F) - u = 0.0F; - else if (s >= 1.0F) - u = (GLfloat) size; - else - u = s * size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - if (*i0 < 0) - *i0 = 0; - if (*i1 >= (GLint) size) - *i1 = size - 1; - break; - case GL_CLAMP_TO_BORDER: - { - const GLfloat min = -1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - if (s <= min) - u = min * size; - else if (s >= max) - u = max * size; - else - u = s * size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - } - break; - case GL_MIRRORED_REPEAT: - { - const GLint flr = IFLOOR(s); - if (flr & 1) - u = 1.0F - (s - (GLfloat) flr); - else - u = s - (GLfloat) flr; - u = (u * size) - 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - if (*i0 < 0) - *i0 = 0; - if (*i1 >= (GLint) size) - *i1 = size - 1; - } - break; - case GL_MIRROR_CLAMP_EXT: - u = FABSF(s); - if (u >= 1.0F) - u = (GLfloat) size; - else - u *= size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - break; - case GL_MIRROR_CLAMP_TO_EDGE_EXT: - u = FABSF(s); - if (u >= 1.0F) - u = (GLfloat) size; - else - u *= size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - if (*i0 < 0) - *i0 = 0; - if (*i1 >= (GLint) size) - *i1 = size - 1; - break; - case GL_MIRROR_CLAMP_TO_BORDER_EXT: - { - const GLfloat min = -1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - u = FABSF(s); - if (u <= min) - u = min * size; - else if (u >= max) - u = max * size; - else - u *= size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - } - break; - case GL_CLAMP: - if (s <= 0.0F) - u = 0.0F; - else if (s >= 1.0F) - u = (GLfloat) size; - else - u = s * size; - u -= 0.5F; - *i0 = IFLOOR(u); - *i1 = *i0 + 1; - break; - default: - _mesa_problem(NULL, "Bad wrap mode"); - u = 0.0F; - } - *weight = FRAC(u); -} - - -/** - * Used to compute texel location for nearest sampling. - */ -static INLINE GLint -nearest_texel_location(GLenum wrapMode, - const struct gl_texture_image *img, - GLint size, GLfloat s) -{ - GLint i; - - switch (wrapMode) { - case GL_REPEAT: - /* s limited to [0,1) */ - /* i limited to [0,size-1] */ - i = IFLOOR(s * size); - if (img->_IsPowerOfTwo) - i &= (size - 1); - else - i = REMAINDER(i, size); - return i; - case GL_CLAMP_TO_EDGE: - { - /* s limited to [min,max] */ - /* i limited to [0, size-1] */ - const GLfloat min = 1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - if (s < min) - i = 0; - else if (s > max) - i = size - 1; - else - i = IFLOOR(s * size); - } - return i; - case GL_CLAMP_TO_BORDER: - { - /* s limited to [min,max] */ - /* i limited to [-1, size] */ - const GLfloat min = -1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - if (s <= min) - i = -1; - else if (s >= max) - i = size; - else - i = IFLOOR(s * size); - } - return i; - case GL_MIRRORED_REPEAT: - { - const GLfloat min = 1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - const GLint flr = IFLOOR(s); - GLfloat u; - if (flr & 1) - u = 1.0F - (s - (GLfloat) flr); - else - u = s - (GLfloat) flr; - if (u < min) - i = 0; - else if (u > max) - i = size - 1; - else - i = IFLOOR(u * size); - } - return i; - case GL_MIRROR_CLAMP_EXT: - { - /* s limited to [0,1] */ - /* i limited to [0,size-1] */ - const GLfloat u = FABSF(s); - if (u <= 0.0F) - i = 0; - else if (u >= 1.0F) - i = size - 1; - else - i = IFLOOR(u * size); - } - return i; - case GL_MIRROR_CLAMP_TO_EDGE_EXT: - { - /* s limited to [min,max] */ - /* i limited to [0, size-1] */ - const GLfloat min = 1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - const GLfloat u = FABSF(s); - if (u < min) - i = 0; - else if (u > max) - i = size - 1; - else - i = IFLOOR(u * size); - } - return i; - case GL_MIRROR_CLAMP_TO_BORDER_EXT: - { - /* s limited to [min,max] */ - /* i limited to [0, size-1] */ - const GLfloat min = -1.0F / (2.0F * size); - const GLfloat max = 1.0F - min; - const GLfloat u = FABSF(s); - if (u < min) - i = -1; - else if (u > max) - i = size; - else - i = IFLOOR(u * size); - } - return i; - case GL_CLAMP: - /* s limited to [0,1] */ - /* i limited to [0,size-1] */ - if (s <= 0.0F) - i = 0; - else if (s >= 1.0F) - i = size - 1; - else - i = IFLOOR(s * size); - return i; - default: - _mesa_problem(NULL, "Bad wrap mode"); - return 0; - } -} - - -/* Power of two image sizes only */ -static INLINE void -linear_repeat_texel_location(GLuint size, GLfloat s, - GLint *i0, GLint *i1, GLfloat *weight) -{ - GLfloat u = s * size - 0.5F; - *i0 = IFLOOR(u) & (size - 1); - *i1 = (*i0 + 1) & (size - 1); - *weight = FRAC(u); -} - - -/** - * Do clamp/wrap for a texture rectangle coord, GL_NEAREST filter mode. - */ -static INLINE GLint -clamp_rect_coord_nearest(GLenum wrapMode, GLfloat coord, GLint max) -{ - switch (wrapMode) { - case GL_CLAMP: - return IFLOOR( CLAMP(coord, 0.0F, max - 1) ); - case GL_CLAMP_TO_EDGE: - return IFLOOR( CLAMP(coord, 0.5F, max - 0.5F) ); - case GL_CLAMP_TO_BORDER: - return IFLOOR( CLAMP(coord, -0.5F, max + 0.5F) ); - default: - _mesa_problem(NULL, "bad wrapMode in clamp_rect_coord_nearest"); - return 0; - } -} - - -/** - * As above, but GL_LINEAR filtering. - */ -static INLINE void -clamp_rect_coord_linear(GLenum wrapMode, GLfloat coord, GLint max, - GLint *i0out, GLint *i1out, GLfloat *weight) -{ - GLfloat fcol; - GLint i0, i1; - switch (wrapMode) { - case GL_CLAMP: - /* Not exactly what the spec says, but it matches NVIDIA output */ - fcol = CLAMP(coord - 0.5F, 0.0F, max - 1); - i0 = IFLOOR(fcol); - i1 = i0 + 1; - break; - case GL_CLAMP_TO_EDGE: - fcol = CLAMP(coord, 0.5F, max - 0.5F); - fcol -= 0.5F; - i0 = IFLOOR(fcol); - i1 = i0 + 1; - if (i1 > max - 1) - i1 = max - 1; - break; - case GL_CLAMP_TO_BORDER: - fcol = CLAMP(coord, -0.5F, max + 0.5F); - fcol -= 0.5F; - i0 = IFLOOR(fcol); - i1 = i0 + 1; - break; - default: - _mesa_problem(NULL, "bad wrapMode in clamp_rect_coord_linear"); - i0 = i1 = 0; - fcol = 0.0F; - } - *i0out = i0; - *i1out = i1; - *weight = FRAC(fcol); -} - - -/** - * Compute slice/image to use for 1D or 2D array texture. - */ -static INLINE GLint -tex_array_slice(GLfloat coord, GLsizei size) -{ - GLint slice = IFLOOR(coord + 0.5f); - slice = CLAMP(slice, 0, size - 1); - return slice; -} - - -/** - * Compute nearest integer texcoords for given texobj and coordinate. - * NOTE: only used for depth texture sampling. - */ -static INLINE void -nearest_texcoord(const struct gl_texture_object *texObj, - GLuint level, - const GLfloat texcoord[4], - GLint *i, GLint *j, GLint *k) -{ - const struct gl_texture_image *img = texObj->Image[0][level]; - const GLint width = img->Width; - const GLint height = img->Height; - const GLint depth = img->Depth; - - switch (texObj->Target) { - case GL_TEXTURE_RECTANGLE_ARB: - *i = clamp_rect_coord_nearest(texObj->WrapS, texcoord[0], width); - *j = clamp_rect_coord_nearest(texObj->WrapT, texcoord[1], height); - *k = 0; - break; - case GL_TEXTURE_1D: - *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]); - *j = 0; - *k = 0; - break; - case GL_TEXTURE_2D: - *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]); - *j = nearest_texel_location(texObj->WrapT, img, height, texcoord[1]); - *k = 0; - break; - case GL_TEXTURE_1D_ARRAY_EXT: - *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]); - *j = tex_array_slice(texcoord[1], height); - *k = 0; - break; - case GL_TEXTURE_2D_ARRAY_EXT: - *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]); - *j = nearest_texel_location(texObj->WrapT, img, height, texcoord[1]); - *k = tex_array_slice(texcoord[2], depth); - break; - default: - *i = *j = *k = 0; - } -} - - -/** - * Compute linear integer texcoords for given texobj and coordinate. - * NOTE: only used for depth texture sampling. - */ -static INLINE void -linear_texcoord(const struct gl_texture_object *texObj, - GLuint level, - const GLfloat texcoord[4], - GLint *i0, GLint *i1, GLint *j0, GLint *j1, GLint *slice, - GLfloat *wi, GLfloat *wj) -{ - const struct gl_texture_image *img = texObj->Image[0][level]; - const GLint width = img->Width; - const GLint height = img->Height; - const GLint depth = img->Depth; - - switch (texObj->Target) { - case GL_TEXTURE_RECTANGLE_ARB: - clamp_rect_coord_linear(texObj->WrapS, texcoord[0], - width, i0, i1, wi); - clamp_rect_coord_linear(texObj->WrapT, texcoord[1], - height, j0, j1, wj); - *slice = 0; - break; - - case GL_TEXTURE_1D: - case GL_TEXTURE_2D: - linear_texel_locations(texObj->WrapS, img, width, - texcoord[0], i0, i1, wi); - linear_texel_locations(texObj->WrapT, img, height, - texcoord[1], j0, j1, wj); - *slice = 0; - break; - - case GL_TEXTURE_1D_ARRAY_EXT: - linear_texel_locations(texObj->WrapS, img, width, - texcoord[0], i0, i1, wi); - *j0 = tex_array_slice(texcoord[1], height); - *j1 = *j0; - *slice = 0; - break; - - case GL_TEXTURE_2D_ARRAY_EXT: - linear_texel_locations(texObj->WrapS, img, width, - texcoord[0], i0, i1, wi); - linear_texel_locations(texObj->WrapT, img, height, - texcoord[1], j0, j1, wj); - *slice = tex_array_slice(texcoord[2], depth); - break; - - default: - *slice = 0; - } -} - - - -/** - * For linear interpolation between mipmap levels N and N+1, this function - * computes N. - */ -static INLINE GLint -linear_mipmap_level(const struct gl_texture_object *tObj, GLfloat lambda) -{ - if (lambda < 0.0F) - return tObj->BaseLevel; - else if (lambda > tObj->_MaxLambda) - return (GLint) (tObj->BaseLevel + tObj->_MaxLambda); - else - return (GLint) (tObj->BaseLevel + lambda); -} - - -/** - * Compute the nearest mipmap level to take texels from. - */ -static INLINE GLint -nearest_mipmap_level(const struct gl_texture_object *tObj, GLfloat lambda) -{ - GLfloat l; - GLint level; - if (lambda <= 0.5F) - l = 0.0F; - else if (lambda > tObj->_MaxLambda + 0.4999F) - l = tObj->_MaxLambda + 0.4999F; - else - l = lambda; - level = (GLint) (tObj->BaseLevel + l + 0.5F); - if (level > tObj->_MaxLevel) - level = tObj->_MaxLevel; - return level; -} - - - -/* - * Bitflags for texture border color sampling. - */ -#define I0BIT 1 -#define I1BIT 2 -#define J0BIT 4 -#define J1BIT 8 -#define K0BIT 16 -#define K1BIT 32 - - - -/** - * The lambda[] array values are always monotonic. Either the whole span - * will be minified, magnified, or split between the two. This function - * determines the subranges in [0, n-1] that are to be minified or magnified. - */ -static INLINE void -compute_min_mag_ranges(const struct gl_texture_object *tObj, - GLuint n, const GLfloat lambda[], - GLuint *minStart, GLuint *minEnd, - GLuint *magStart, GLuint *magEnd) -{ - GLfloat minMagThresh; - - /* we shouldn't be here if minfilter == magfilter */ - ASSERT(tObj->MinFilter != tObj->MagFilter); - - /* This bit comes from the OpenGL spec: */ - if (tObj->MagFilter == GL_LINEAR - && (tObj->MinFilter == GL_NEAREST_MIPMAP_NEAREST || - tObj->MinFilter == GL_NEAREST_MIPMAP_LINEAR)) { - minMagThresh = 0.5F; - } - else { - minMagThresh = 0.0F; - } - -#if 0 - /* DEBUG CODE: Verify that lambda[] is monotonic. - * We can't really use this because the inaccuracy in the LOG2 function - * causes this test to fail, yet the resulting texturing is correct. - */ - if (n > 1) { - GLuint i; - printf("lambda delta = %g\n", lambda[0] - lambda[n-1]); - if (lambda[0] >= lambda[n-1]) { /* decreasing */ - for (i = 0; i < n - 1; i++) { - ASSERT((GLint) (lambda[i] * 10) >= (GLint) (lambda[i+1] * 10)); - } - } - else { /* increasing */ - for (i = 0; i < n - 1; i++) { - ASSERT((GLint) (lambda[i] * 10) <= (GLint) (lambda[i+1] * 10)); - } - } - } -#endif /* DEBUG */ - - if (lambda[0] <= minMagThresh && (n <= 1 || lambda[n-1] <= minMagThresh)) { - /* magnification for whole span */ - *magStart = 0; - *magEnd = n; - *minStart = *minEnd = 0; - } - else if (lambda[0] > minMagThresh && (n <=1 || lambda[n-1] > minMagThresh)) { - /* minification for whole span */ - *minStart = 0; - *minEnd = n; - *magStart = *magEnd = 0; - } - else { - /* a mix of minification and magnification */ - GLuint i; - if (lambda[0] > minMagThresh) { - /* start with minification */ - for (i = 1; i < n; i++) { - if (lambda[i] <= minMagThresh) - break; - } - *minStart = 0; - *minEnd = i; - *magStart = i; - *magEnd = n; - } - else { - /* start with magnification */ - for (i = 1; i < n; i++) { - if (lambda[i] > minMagThresh) - break; - } - *magStart = 0; - *magEnd = i; - *minStart = i; - *minEnd = n; - } - } - -#if 0 - /* Verify the min/mag Start/End values - * We don't use this either (see above) - */ - { - GLint i; - for (i = 0; i < n; i++) { - if (lambda[i] > minMagThresh) { - /* minification */ - ASSERT(i >= *minStart); - ASSERT(i < *minEnd); - } - else { - /* magnification */ - ASSERT(i >= *magStart); - ASSERT(i < *magEnd); - } - } - } -#endif -} - - -/** - * When we sample the border color, it must be interpreted according to - * the base texture format. Ex: if the texture base format it GL_ALPHA, - * we return (0,0,0,BorderAlpha). - */ -static INLINE void -get_border_color(const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - GLfloat rgba[4]) -{ - switch (img->_BaseFormat) { - case GL_RGB: - rgba[0] = tObj->BorderColor.f[0]; - rgba[1] = tObj->BorderColor.f[1]; - rgba[2] = tObj->BorderColor.f[2]; - rgba[3] = 1.0F; - break; - case GL_ALPHA: - rgba[0] = rgba[1] = rgba[2] = 0.0; - rgba[3] = tObj->BorderColor.f[3]; - break; - case GL_LUMINANCE: - rgba[0] = rgba[1] = rgba[2] = tObj->BorderColor.f[0]; - rgba[3] = 1.0; - break; - case GL_LUMINANCE_ALPHA: - rgba[0] = rgba[1] = rgba[2] = tObj->BorderColor.f[0]; - rgba[3] = tObj->BorderColor.f[3]; - break; - case GL_INTENSITY: - rgba[0] = rgba[1] = rgba[2] = rgba[3] = tObj->BorderColor.f[0]; - break; - default: - COPY_4V(rgba, tObj->BorderColor.f); - } -} - - -/**********************************************************************/ -/* 1-D Texture Sampling Functions */ -/**********************************************************************/ - -/** - * Return the texture sample for coordinate (s) using GL_NEAREST filter. - */ -static INLINE void -sample_1d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], GLfloat rgba[4]) -{ - const GLint width = img->Width2; /* without border, power of two */ - GLint i; - i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]); - /* skip over the border, if any */ - i += img->Border; - if (i < 0 || i >= (GLint) img->Width) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - get_border_color(tObj, img, rgba); - } - else { - img->FetchTexelf(img, i, 0, 0, rgba); - } -} - - -/** - * Return the texture sample for coordinate (s) using GL_LINEAR filter. - */ -static INLINE void -sample_1d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], GLfloat rgba[4]) -{ - const GLint width = img->Width2; - GLint i0, i1; - GLbitfield useBorderColor = 0x0; - GLfloat a; - GLfloat t0[4], t1[4]; /* texels */ - - linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a); - - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - } - else { - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - } - - /* fetch texel colors */ - if (useBorderColor & I0BIT) { - get_border_color(tObj, img, t0); - } - else { - img->FetchTexelf(img, i0, 0, 0, t0); - } - if (useBorderColor & I1BIT) { - get_border_color(tObj, img, t1); - } - else { - img->FetchTexelf(img, i1, 0, 0, t1); - } - - lerp_rgba(rgba, a, t0, t1); -} - - -static void -sample_1d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_1d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_1d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_1d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_1d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_1d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_1d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_1d_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_1d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_1d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample 1D texture, nearest filtering for both min/magnification */ -static void -sample_nearest_1d( GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4] ) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_1d_nearest(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 1D texture, linear filtering for both min/magnification */ -static void -sample_linear_1d( GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4] ) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_1d_linear(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 1D texture, using lambda to choose between min/magnification */ -static void -sample_lambda_1d( GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4] ) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - GLuint i; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_1d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_1d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_1d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_1d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_1d_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_1d_texture"); - return; - } - } -} - - -/**********************************************************************/ -/* 2-D Texture Sampling Functions */ -/**********************************************************************/ - - -/** - * Return the texture sample for coordinate (s,t) using GL_NEAREST filter. - */ -static INLINE void -sample_2d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height2; /* without border, power of two */ - GLint i, j; - (void) ctx; - - i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]); - j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]); - - /* skip over the border, if any */ - i += img->Border; - j += img->Border; - - if (i < 0 || i >= (GLint) img->Width || j < 0 || j >= (GLint) img->Height) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - get_border_color(tObj, img, rgba); - } - else { - img->FetchTexelf(img, i, j, 0, rgba); - } -} - - -/** - * Return the texture sample for coordinate (s,t) using GL_LINEAR filter. - * New sampling code contributed by Lynn Quam <quam@ai.sri.com>. - */ -static INLINE void -sample_2d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[]) -{ - const GLint width = img->Width2; - const GLint height = img->Height2; - GLint i0, j0, i1, j1; - GLbitfield useBorderColor = 0x0; - GLfloat a, b; - GLfloat t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */ - - linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a); - linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b); - - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - j0 += img->Border; - j1 += img->Border; - } - else { - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - } - - /* fetch four texel colors */ - if (useBorderColor & (I0BIT | J0BIT)) { - get_border_color(tObj, img, t00); - } - else { - img->FetchTexelf(img, i0, j0, 0, t00); - } - if (useBorderColor & (I1BIT | J0BIT)) { - get_border_color(tObj, img, t10); - } - else { - img->FetchTexelf(img, i1, j0, 0, t10); - } - if (useBorderColor & (I0BIT | J1BIT)) { - get_border_color(tObj, img, t01); - } - else { - img->FetchTexelf(img, i0, j1, 0, t01); - } - if (useBorderColor & (I1BIT | J1BIT)) { - get_border_color(tObj, img, t11); - } - else { - img->FetchTexelf(img, i1, j1, 0, t11); - } - - lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11); -} - - -/** - * As above, but we know WRAP_S == REPEAT and WRAP_T == REPEAT. - * We don't have to worry about the texture border. - */ -static INLINE void -sample_2d_linear_repeat(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[]) -{ - const GLint width = img->Width2; - const GLint height = img->Height2; - GLint i0, j0, i1, j1; - GLfloat wi, wj; - GLfloat t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */ - - (void) ctx; - - ASSERT(tObj->WrapS == GL_REPEAT); - ASSERT(tObj->WrapT == GL_REPEAT); - ASSERT(img->Border == 0); - ASSERT(img->_BaseFormat != GL_COLOR_INDEX); - ASSERT(img->_IsPowerOfTwo); - - linear_repeat_texel_location(width, texcoord[0], &i0, &i1, &wi); - linear_repeat_texel_location(height, texcoord[1], &j0, &j1, &wj); - - img->FetchTexelf(img, i0, j0, 0, t00); - img->FetchTexelf(img, i1, j0, 0, t10); - img->FetchTexelf(img, i0, j1, 0, t01); - img->FetchTexelf(img, i1, j1, 0, t11); - - lerp_rgba_2d(rgba, wi, wj, t00, t10, t01, t11); -} - - -static void -sample_2d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_2d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_2d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_2d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_2d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_2d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_2d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_2d_linear_mipmap_linear( GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4] ) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_2d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_2d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_2d_linear_mipmap_linear_repeat(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - ASSERT(tObj->WrapS == GL_REPEAT); - ASSERT(tObj->WrapT == GL_REPEAT); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level ], - texcoord[i], t0); - sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level+1], - texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample 2D texture, nearest filtering for both min/magnification */ -static void -sample_nearest_2d(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_2d_nearest(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 2D texture, linear filtering for both min/magnification */ -static void -sample_linear_2d(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - if (tObj->WrapS == GL_REPEAT && - tObj->WrapT == GL_REPEAT && - image->_IsPowerOfTwo && - image->Border == 0) { - for (i = 0; i < n; i++) { - sample_2d_linear_repeat(ctx, tObj, image, texcoords[i], rgba[i]); - } - } - else { - for (i = 0; i < n; i++) { - sample_2d_linear(ctx, tObj, image, texcoords[i], rgba[i]); - } - } -} - - -/** - * Optimized 2-D texture sampling: - * S and T wrap mode == GL_REPEAT - * GL_NEAREST min/mag filter - * No border, - * RowStride == Width, - * Format = GL_RGB - */ -static void -opt_sample_rgb_2d(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0][tObj->BaseLevel]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint colMask = img->Width - 1; - const GLint rowMask = img->Height - 1; - const GLint shift = img->WidthLog2; - GLuint k; - (void) ctx; - (void) lambda; - ASSERT(tObj->WrapS==GL_REPEAT); - ASSERT(tObj->WrapT==GL_REPEAT); - ASSERT(img->Border==0); - ASSERT(img->TexFormat == MESA_FORMAT_RGB888); - ASSERT(img->_IsPowerOfTwo); - - for (k=0; k<n; k++) { - GLint i = IFLOOR(texcoords[k][0] * width) & colMask; - GLint j = IFLOOR(texcoords[k][1] * height) & rowMask; - GLint pos = (j << shift) | i; - GLubyte *texel = ((GLubyte *) img->Data) + 3*pos; - rgba[k][RCOMP] = UBYTE_TO_FLOAT(texel[2]); - rgba[k][GCOMP] = UBYTE_TO_FLOAT(texel[1]); - rgba[k][BCOMP] = UBYTE_TO_FLOAT(texel[0]); - } -} - - -/** - * Optimized 2-D texture sampling: - * S and T wrap mode == GL_REPEAT - * GL_NEAREST min/mag filter - * No border - * RowStride == Width, - * Format = GL_RGBA - */ -static void -opt_sample_rgba_2d(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0][tObj->BaseLevel]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint colMask = img->Width - 1; - const GLint rowMask = img->Height - 1; - const GLint shift = img->WidthLog2; - GLuint i; - (void) ctx; - (void) lambda; - ASSERT(tObj->WrapS==GL_REPEAT); - ASSERT(tObj->WrapT==GL_REPEAT); - ASSERT(img->Border==0); - ASSERT(img->TexFormat == MESA_FORMAT_RGBA8888); - ASSERT(img->_IsPowerOfTwo); - - for (i = 0; i < n; i++) { - const GLint col = IFLOOR(texcoords[i][0] * width) & colMask; - const GLint row = IFLOOR(texcoords[i][1] * height) & rowMask; - const GLint pos = (row << shift) | col; - const GLuint texel = *((GLuint *) img->Data + pos); - rgba[i][RCOMP] = UBYTE_TO_FLOAT( (texel >> 24) ); - rgba[i][GCOMP] = UBYTE_TO_FLOAT( (texel >> 16) & 0xff ); - rgba[i][BCOMP] = UBYTE_TO_FLOAT( (texel >> 8) & 0xff ); - rgba[i][ACOMP] = UBYTE_TO_FLOAT( (texel ) & 0xff ); - } -} - - -/** Sample 2D texture, using lambda to choose between min/magnification */ -static void -sample_lambda_2d(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - const struct gl_texture_image *tImg = tObj->Image[0][tObj->BaseLevel]; - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - - const GLboolean repeatNoBorderPOT = (tObj->WrapS == GL_REPEAT) - && (tObj->WrapT == GL_REPEAT) - && (tImg->Border == 0 && (tImg->Width == tImg->RowStride)) - && (tImg->_BaseFormat != GL_COLOR_INDEX) - && tImg->_IsPowerOfTwo; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - if (repeatNoBorderPOT) { - switch (tImg->TexFormat) { - case MESA_FORMAT_RGB888: - opt_sample_rgb_2d(ctx, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - case MESA_FORMAT_RGBA8888: - opt_sample_rgba_2d(ctx, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - default: - sample_nearest_2d(ctx, tObj, m, texcoords + minStart, - NULL, rgba + minStart ); - } - } - else { - sample_nearest_2d(ctx, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - } - break; - case GL_LINEAR: - sample_linear_2d(ctx, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_2d_nearest_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_2d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_2d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - if (repeatNoBorderPOT) - sample_2d_linear_mipmap_linear_repeat(ctx, tObj, m, - texcoords + minStart, lambda + minStart, rgba + minStart); - else - sample_2d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_2d_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - const GLuint m = magEnd - magStart; - - switch (tObj->MagFilter) { - case GL_NEAREST: - if (repeatNoBorderPOT) { - switch (tImg->TexFormat) { - case MESA_FORMAT_RGB888: - opt_sample_rgb_2d(ctx, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - case MESA_FORMAT_RGBA8888: - opt_sample_rgba_2d(ctx, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - default: - sample_nearest_2d(ctx, tObj, m, texcoords + magStart, - NULL, rgba + magStart ); - } - } - else { - sample_nearest_2d(ctx, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - } - break; - case GL_LINEAR: - sample_linear_2d(ctx, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_lambda_2d"); - } - } -} - - - -/**********************************************************************/ -/* 3-D Texture Sampling Functions */ -/**********************************************************************/ - -/** - * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter. - */ -static INLINE void -sample_3d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height2; /* without border, power of two */ - const GLint depth = img->Depth2; /* without border, power of two */ - GLint i, j, k; - (void) ctx; - - i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]); - j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]); - k = nearest_texel_location(tObj->WrapR, img, depth, texcoord[2]); - - if (i < 0 || i >= (GLint) img->Width || - j < 0 || j >= (GLint) img->Height || - k < 0 || k >= (GLint) img->Depth) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - get_border_color(tObj, img, rgba); - } - else { - img->FetchTexelf(img, i, j, k, rgba); - } -} - - -/** - * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter. - */ -static void -sample_3d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; - const GLint height = img->Height2; - const GLint depth = img->Depth2; - GLint i0, j0, k0, i1, j1, k1; - GLbitfield useBorderColor = 0x0; - GLfloat a, b, c; - GLfloat t000[4], t010[4], t001[4], t011[4]; - GLfloat t100[4], t110[4], t101[4], t111[4]; - - linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a); - linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b); - linear_texel_locations(tObj->WrapR, img, depth, texcoord[2], &k0, &k1, &c); - - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - j0 += img->Border; - j1 += img->Border; - k0 += img->Border; - k1 += img->Border; - } - else { - /* check if sampling texture border color */ - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - if (k0 < 0 || k0 >= depth) useBorderColor |= K0BIT; - if (k1 < 0 || k1 >= depth) useBorderColor |= K1BIT; - } - - /* Fetch texels */ - if (useBorderColor & (I0BIT | J0BIT | K0BIT)) { - get_border_color(tObj, img, t000); - } - else { - img->FetchTexelf(img, i0, j0, k0, t000); - } - if (useBorderColor & (I1BIT | J0BIT | K0BIT)) { - get_border_color(tObj, img, t100); - } - else { - img->FetchTexelf(img, i1, j0, k0, t100); - } - if (useBorderColor & (I0BIT | J1BIT | K0BIT)) { - get_border_color(tObj, img, t010); - } - else { - img->FetchTexelf(img, i0, j1, k0, t010); - } - if (useBorderColor & (I1BIT | J1BIT | K0BIT)) { - get_border_color(tObj, img, t110); - } - else { - img->FetchTexelf(img, i1, j1, k0, t110); - } - - if (useBorderColor & (I0BIT | J0BIT | K1BIT)) { - get_border_color(tObj, img, t001); - } - else { - img->FetchTexelf(img, i0, j0, k1, t001); - } - if (useBorderColor & (I1BIT | J0BIT | K1BIT)) { - get_border_color(tObj, img, t101); - } - else { - img->FetchTexelf(img, i1, j0, k1, t101); - } - if (useBorderColor & (I0BIT | J1BIT | K1BIT)) { - get_border_color(tObj, img, t011); - } - else { - img->FetchTexelf(img, i0, j1, k1, t011); - } - if (useBorderColor & (I1BIT | J1BIT | K1BIT)) { - get_border_color(tObj, img, t111); - } - else { - img->FetchTexelf(img, i1, j1, k1, t111); - } - - /* trilinear interpolation of samples */ - lerp_rgba_3d(rgba, a, b, c, t000, t100, t010, t110, t001, t101, t011, t111); -} - - -static void -sample_3d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4] ) -{ - GLuint i; - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_3d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_3d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_3d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]); - } -} - - -static void -sample_3d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_3d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_3d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_3d_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_3d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_3d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample 3D texture, nearest filtering for both min/magnification */ -static void -sample_nearest_3d(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_3d_nearest(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 3D texture, linear filtering for both min/magnification */ -static void -sample_linear_3d(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_3d_linear(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 3D texture, using lambda to choose between min/magnification */ -static void -sample_lambda_3d(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - GLuint i; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_3d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_3d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_3d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_3d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_3d_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_3d_texture"); - return; - } - } -} - - -/**********************************************************************/ -/* Texture Cube Map Sampling Functions */ -/**********************************************************************/ - -/** - * Choose one of six sides of a texture cube map given the texture - * coord (rx,ry,rz). Return pointer to corresponding array of texture - * images. - */ -static const struct gl_texture_image ** -choose_cube_face(const struct gl_texture_object *texObj, - const GLfloat texcoord[4], GLfloat newCoord[4]) -{ - /* - major axis - direction target sc tc ma - ---------- ------------------------------- --- --- --- - +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx - -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx - +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry - -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry - +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz - -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz - */ - const GLfloat rx = texcoord[0]; - const GLfloat ry = texcoord[1]; - const GLfloat rz = texcoord[2]; - const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz); - GLuint face; - GLfloat sc, tc, ma; - - if (arx >= ary && arx >= arz) { - if (rx >= 0.0F) { - face = FACE_POS_X; - sc = -rz; - tc = -ry; - ma = arx; - } - else { - face = FACE_NEG_X; - sc = rz; - tc = -ry; - ma = arx; - } - } - else if (ary >= arx && ary >= arz) { - if (ry >= 0.0F) { - face = FACE_POS_Y; - sc = rx; - tc = rz; - ma = ary; - } - else { - face = FACE_NEG_Y; - sc = rx; - tc = -rz; - ma = ary; - } - } - else { - if (rz > 0.0F) { - face = FACE_POS_Z; - sc = rx; - tc = -ry; - ma = arz; - } - else { - face = FACE_NEG_Z; - sc = -rx; - tc = -ry; - ma = arz; - } - } - - { - const float ima = 1.0F / ma; - newCoord[0] = ( sc * ima + 1.0F ) * 0.5F; - newCoord[1] = ( tc * ima + 1.0F ) * 0.5F; - } - - return (const struct gl_texture_image **) texObj->Image[face]; -} - - -static void -sample_nearest_cube(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint i; - (void) lambda; - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - images = choose_cube_face(tObj, texcoords[i], newCoord); - sample_2d_nearest(ctx, tObj, images[tObj->BaseLevel], - newCoord, rgba[i]); - } -} - - -static void -sample_linear_cube(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - (void) lambda; - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - images = choose_cube_face(tObj, texcoords[i], newCoord); - sample_2d_linear(ctx, tObj, images[tObj->BaseLevel], - newCoord, rgba[i]); - } -} - - -static void -sample_cube_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level; - images = choose_cube_face(tObj, texcoord[i], newCoord); - - /* XXX we actually need to recompute lambda here based on the newCoords. - * But we would need the texcoords of adjacent fragments to compute that - * properly, and we don't have those here. - * For now, do an approximation: subtracting 1 from the chosen mipmap - * level seems to work in some test cases. - * The same adjustment is done in the next few functions. - */ - level = nearest_mipmap_level(tObj, lambda[i]); - level = MAX2(level - 1, 0); - - sample_2d_nearest(ctx, tObj, images[level], newCoord, rgba[i]); - } -} - - -static void -sample_cube_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level = nearest_mipmap_level(tObj, lambda[i]); - level = MAX2(level - 1, 0); /* see comment above */ - images = choose_cube_face(tObj, texcoord[i], newCoord); - sample_2d_linear(ctx, tObj, images[level], newCoord, rgba[i]); - } -} - - -static void -sample_cube_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level = linear_mipmap_level(tObj, lambda[i]); - level = MAX2(level - 1, 0); /* see comment above */ - images = choose_cube_face(tObj, texcoord[i], newCoord); - if (level >= tObj->_MaxLevel) { - sample_2d_nearest(ctx, tObj, images[tObj->_MaxLevel], - newCoord, rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_nearest(ctx, tObj, images[level ], newCoord, t0); - sample_2d_nearest(ctx, tObj, images[level+1], newCoord, t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_cube_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level = linear_mipmap_level(tObj, lambda[i]); - level = MAX2(level - 1, 0); /* see comment above */ - images = choose_cube_face(tObj, texcoord[i], newCoord); - if (level >= tObj->_MaxLevel) { - sample_2d_linear(ctx, tObj, images[tObj->_MaxLevel], - newCoord, rgba[i]); - } - else { - GLfloat t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear(ctx, tObj, images[level ], newCoord, t0); - sample_2d_linear(ctx, tObj, images[level+1], newCoord, t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample cube texture, using lambda to choose between min/magnification */ -static void -sample_lambda_cube(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - sample_nearest_cube(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR: - sample_linear_cube(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_cube_nearest_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_cube_linear_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_cube_nearest_mipmap_linear(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_cube_linear_mipmap_linear(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_lambda_cube"); - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - const GLuint m = magEnd - magStart; - switch (tObj->MagFilter) { - case GL_NEAREST: - sample_nearest_cube(ctx, tObj, m, texcoords + magStart, - lambda + magStart, rgba + magStart); - break; - case GL_LINEAR: - sample_linear_cube(ctx, tObj, m, texcoords + magStart, - lambda + magStart, rgba + magStart); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_lambda_cube"); - } - } -} - - -/**********************************************************************/ -/* Texture Rectangle Sampling Functions */ -/**********************************************************************/ - - -static void -sample_nearest_rect(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0][0]; - const GLint width = img->Width; - const GLint height = img->Height; - GLuint i; - - (void) ctx; - (void) lambda; - - ASSERT(tObj->WrapS == GL_CLAMP || - tObj->WrapS == GL_CLAMP_TO_EDGE || - tObj->WrapS == GL_CLAMP_TO_BORDER); - ASSERT(tObj->WrapT == GL_CLAMP || - tObj->WrapT == GL_CLAMP_TO_EDGE || - tObj->WrapT == GL_CLAMP_TO_BORDER); - ASSERT(img->_BaseFormat != GL_COLOR_INDEX); - - for (i = 0; i < n; i++) { - GLint row, col; - col = clamp_rect_coord_nearest(tObj->WrapS, texcoords[i][0], width); - row = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height); - if (col < 0 || col >= width || row < 0 || row >= height) - get_border_color(tObj, img, rgba[i]); - else - img->FetchTexelf(img, col, row, 0, rgba[i]); - } -} - - -static void -sample_linear_rect(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0][0]; - const GLint width = img->Width; - const GLint height = img->Height; - GLuint i; - - (void) ctx; - (void) lambda; - - ASSERT(tObj->WrapS == GL_CLAMP || - tObj->WrapS == GL_CLAMP_TO_EDGE || - tObj->WrapS == GL_CLAMP_TO_BORDER); - ASSERT(tObj->WrapT == GL_CLAMP || - tObj->WrapT == GL_CLAMP_TO_EDGE || - tObj->WrapT == GL_CLAMP_TO_BORDER); - ASSERT(img->_BaseFormat != GL_COLOR_INDEX); - - for (i = 0; i < n; i++) { - GLint i0, j0, i1, j1; - GLfloat t00[4], t01[4], t10[4], t11[4]; - GLfloat a, b; - GLbitfield useBorderColor = 0x0; - - clamp_rect_coord_linear(tObj->WrapS, texcoords[i][0], width, - &i0, &i1, &a); - clamp_rect_coord_linear(tObj->WrapT, texcoords[i][1], height, - &j0, &j1, &b); - - /* compute integer rows/columns */ - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - - /* get four texel samples */ - if (useBorderColor & (I0BIT | J0BIT)) - get_border_color(tObj, img, t00); - else - img->FetchTexelf(img, i0, j0, 0, t00); - - if (useBorderColor & (I1BIT | J0BIT)) - get_border_color(tObj, img, t10); - else - img->FetchTexelf(img, i1, j0, 0, t10); - - if (useBorderColor & (I0BIT | J1BIT)) - get_border_color(tObj, img, t01); - else - img->FetchTexelf(img, i0, j1, 0, t01); - - if (useBorderColor & (I1BIT | J1BIT)) - get_border_color(tObj, img, t11); - else - img->FetchTexelf(img, i1, j1, 0, t11); - - lerp_rgba_2d(rgba[i], a, b, t00, t10, t01, t11); - } -} - - -/** Sample Rect texture, using lambda to choose between min/magnification */ -static void -sample_lambda_rect(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint minStart, minEnd, magStart, magEnd; - - /* We only need lambda to decide between minification and magnification. - * There is no mipmapping with rectangular textures. - */ - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - if (tObj->MinFilter == GL_NEAREST) { - sample_nearest_rect(ctx, tObj, minEnd - minStart, - texcoords + minStart, NULL, rgba + minStart); - } - else { - sample_linear_rect(ctx, tObj, minEnd - minStart, - texcoords + minStart, NULL, rgba + minStart); - } - } - if (magStart < magEnd) { - if (tObj->MagFilter == GL_NEAREST) { - sample_nearest_rect(ctx, tObj, magEnd - magStart, - texcoords + magStart, NULL, rgba + magStart); - } - else { - sample_linear_rect(ctx, tObj, magEnd - magStart, - texcoords + magStart, NULL, rgba + magStart); - } - } -} - - -/**********************************************************************/ -/* 2D Texture Array Sampling Functions */ -/**********************************************************************/ - -/** - * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter. - */ -static void -sample_2d_array_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height2; /* without border, power of two */ - const GLint depth = img->Depth; - GLint i, j; - GLint array; - (void) ctx; - - i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]); - j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]); - array = tex_array_slice(texcoord[2], depth); - - if (i < 0 || i >= (GLint) img->Width || - j < 0 || j >= (GLint) img->Height || - array < 0 || array >= (GLint) img->Depth) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - get_border_color(tObj, img, rgba); - } - else { - img->FetchTexelf(img, i, j, array, rgba); - } -} - - -/** - * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter. - */ -static void -sample_2d_array_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; - const GLint height = img->Height2; - const GLint depth = img->Depth; - GLint i0, j0, i1, j1; - GLint array; - GLbitfield useBorderColor = 0x0; - GLfloat a, b; - GLfloat t00[4], t01[4], t10[4], t11[4]; - - linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a); - linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b); - array = tex_array_slice(texcoord[2], depth); - - if (array < 0 || array >= depth) { - COPY_4V(rgba, tObj->BorderColor.f); - } - else { - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - j0 += img->Border; - j1 += img->Border; - } - else { - /* check if sampling texture border color */ - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - } - - /* Fetch texels */ - if (useBorderColor & (I0BIT | J0BIT)) { - get_border_color(tObj, img, t00); - } - else { - img->FetchTexelf(img, i0, j0, array, t00); - } - if (useBorderColor & (I1BIT | J0BIT)) { - get_border_color(tObj, img, t10); - } - else { - img->FetchTexelf(img, i1, j0, array, t10); - } - if (useBorderColor & (I0BIT | J1BIT)) { - get_border_color(tObj, img, t01); - } - else { - img->FetchTexelf(img, i0, j1, array, t01); - } - if (useBorderColor & (I1BIT | J1BIT)) { - get_border_color(tObj, img, t11); - } - else { - img->FetchTexelf(img, i1, j1, array, t11); - } - - /* trilinear interpolation of samples */ - lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11); - } -} - - -static void -sample_2d_array_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], - rgba[i]); - } -} - - -static void -sample_2d_array_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_2d_array_linear(ctx, tObj, tObj->Image[0][level], - texcoord[i], rgba[i]); - } -} - - -static void -sample_2d_array_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level ], - texcoord[i], t0); - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level+1], - texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_2d_array_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_array_linear(ctx, tObj, tObj->Image[0][level ], - texcoord[i], t0); - sample_2d_array_linear(ctx, tObj, tObj->Image[0][level+1], - texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample 2D Array texture, nearest filtering for both min/magnification */ -static void -sample_nearest_2d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_2d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - - -/** Sample 2D Array texture, linear filtering for both min/magnification */ -static void -sample_linear_2d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_2d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 2D Array texture, using lambda to choose between min/magnification */ -static void -sample_lambda_2d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - GLuint i; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_2d_array_nearest_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_2d_array_linear_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_2d_array_nearest_mipmap_linear(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_2d_array_linear_mipmap_linear(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_2d_array_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_2d_array_texture"); - return; - } - } -} - - - - -/**********************************************************************/ -/* 1D Texture Array Sampling Functions */ -/**********************************************************************/ - -/** - * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter. - */ -static void -sample_1d_array_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height; - GLint i; - GLint array; - (void) ctx; - - i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]); - array = tex_array_slice(texcoord[1], height); - - if (i < 0 || i >= (GLint) img->Width || - array < 0 || array >= (GLint) img->Height) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - get_border_color(tObj, img, rgba); - } - else { - img->FetchTexelf(img, i, array, 0, rgba); - } -} - - -/** - * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter. - */ -static void -sample_1d_array_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLfloat rgba[4]) -{ - const GLint width = img->Width2; - const GLint height = img->Height; - GLint i0, i1; - GLint array; - GLbitfield useBorderColor = 0x0; - GLfloat a; - GLfloat t0[4], t1[4]; - - linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a); - array = tex_array_slice(texcoord[1], height); - - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - } - else { - /* check if sampling texture border color */ - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - } - - if (array < 0 || array >= height) useBorderColor |= K0BIT; - - /* Fetch texels */ - if (useBorderColor & (I0BIT | K0BIT)) { - get_border_color(tObj, img, t0); - } - else { - img->FetchTexelf(img, i0, array, 0, t0); - } - if (useBorderColor & (I1BIT | K0BIT)) { - get_border_color(tObj, img, t1); - } - else { - img->FetchTexelf(img, i1, array, 0, t1); - } - - /* bilinear interpolation of samples */ - lerp_rgba(rgba, a, t0, t1); -} - - -static void -sample_1d_array_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], - rgba[i]); - } -} - - -static void -sample_1d_array_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = nearest_mipmap_level(tObj, lambda[i]); - sample_1d_array_linear(ctx, tObj, tObj->Image[0][level], - texcoord[i], rgba[i]); - } -} - - -static void -sample_1d_array_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -static void -sample_1d_array_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level = linear_mipmap_level(tObj, lambda[i]); - if (level >= tObj->_MaxLevel) { - sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLfloat t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_1d_array_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); - sample_1d_array_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - lerp_rgba(rgba[i], f, t0, t1); - } - } -} - - -/** Sample 1D Array texture, nearest filtering for both min/magnification */ -static void -sample_nearest_1d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_1d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 1D Array texture, linear filtering for both min/magnification */ -static void -sample_linear_1d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLfloat rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; - (void) lambda; - for (i = 0; i < n; i++) { - sample_1d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]); - } -} - - -/** Sample 1D Array texture, using lambda to choose between min/magnification */ -static void -sample_lambda_1d_array(GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - GLuint i; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(tObj, n, lambda, - &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_1d_array_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_1d_array_linear_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_1d_array_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_1d_array_linear_mipmap_linear(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, - rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_1d_array_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_1d_array_texture"); - return; - } - } -} - - -/** - * Compare texcoord against depth sample. Return 1.0 or the ambient value. - */ -static INLINE GLfloat -shadow_compare(GLenum function, GLfloat coord, GLfloat depthSample, - GLfloat ambient) -{ - switch (function) { - case GL_LEQUAL: - return (coord <= depthSample) ? 1.0F : ambient; - case GL_GEQUAL: - return (coord >= depthSample) ? 1.0F : ambient; - case GL_LESS: - return (coord < depthSample) ? 1.0F : ambient; - case GL_GREATER: - return (coord > depthSample) ? 1.0F : ambient; - case GL_EQUAL: - return (coord == depthSample) ? 1.0F : ambient; - case GL_NOTEQUAL: - return (coord != depthSample) ? 1.0F : ambient; - case GL_ALWAYS: - return 1.0F; - case GL_NEVER: - return ambient; - case GL_NONE: - return depthSample; - default: - _mesa_problem(NULL, "Bad compare func in shadow_compare"); - return ambient; - } -} - - -/** - * Compare texcoord against four depth samples. - */ -static INLINE GLfloat -shadow_compare4(GLenum function, GLfloat coord, - GLfloat depth00, GLfloat depth01, - GLfloat depth10, GLfloat depth11, - GLfloat ambient, GLfloat wi, GLfloat wj) -{ - const GLfloat d = (1.0F - (GLfloat) ambient) * 0.25F; - GLfloat luminance = 1.0F; - - switch (function) { - case GL_LEQUAL: - if (depth00 <= coord) luminance -= d; - if (depth01 <= coord) luminance -= d; - if (depth10 <= coord) luminance -= d; - if (depth11 <= coord) luminance -= d; - return luminance; - case GL_GEQUAL: - if (depth00 >= coord) luminance -= d; - if (depth01 >= coord) luminance -= d; - if (depth10 >= coord) luminance -= d; - if (depth11 >= coord) luminance -= d; - return luminance; - case GL_LESS: - if (depth00 < coord) luminance -= d; - if (depth01 < coord) luminance -= d; - if (depth10 < coord) luminance -= d; - if (depth11 < coord) luminance -= d; - return luminance; - case GL_GREATER: - if (depth00 > coord) luminance -= d; - if (depth01 > coord) luminance -= d; - if (depth10 > coord) luminance -= d; - if (depth11 > coord) luminance -= d; - return luminance; - case GL_EQUAL: - if (depth00 == coord) luminance -= d; - if (depth01 == coord) luminance -= d; - if (depth10 == coord) luminance -= d; - if (depth11 == coord) luminance -= d; - return luminance; - case GL_NOTEQUAL: - if (depth00 != coord) luminance -= d; - if (depth01 != coord) luminance -= d; - if (depth10 != coord) luminance -= d; - if (depth11 != coord) luminance -= d; - return luminance; - case GL_ALWAYS: - return 0.0; - case GL_NEVER: - return ambient; - case GL_NONE: - /* ordinary bilinear filtering */ - return lerp_2d(wi, wj, depth00, depth10, depth01, depth11); - default: - _mesa_problem(NULL, "Bad compare func in sample_depth_texture"); - return 0.0F; - } -} - - -/** - * Choose the mipmap level to use when sampling from a depth texture. - */ -static int -choose_depth_texture_level(const struct gl_texture_object *tObj, GLfloat lambda) -{ - GLint level; - - lambda = CLAMP(lambda, tObj->MinLod, tObj->MaxLod); - - level = (GLint) lambda; - - level = CLAMP(level, tObj->BaseLevel, tObj->_MaxLevel); - - return level; -} - - -/** - * Sample a shadow/depth texture. This function is incomplete. It doesn't - * check for minification vs. magnification, etc. - */ -static void -sample_depth_texture( GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat texel[][4] ) -{ - const GLint level = choose_depth_texture_level(tObj, lambda[0]); - const struct gl_texture_image *img = tObj->Image[0][level]; - const GLint width = img->Width; - const GLint height = img->Height; - const GLint depth = img->Depth; - const GLuint compare_coord = (tObj->Target == GL_TEXTURE_2D_ARRAY_EXT) - ? 3 : 2; - GLfloat ambient; - GLenum function; - GLfloat result; - - ASSERT(img->_BaseFormat == GL_DEPTH_COMPONENT || - img->_BaseFormat == GL_DEPTH_STENCIL_EXT); - - ASSERT(tObj->Target == GL_TEXTURE_1D || - tObj->Target == GL_TEXTURE_2D || - tObj->Target == GL_TEXTURE_RECTANGLE_NV || - tObj->Target == GL_TEXTURE_1D_ARRAY_EXT || - tObj->Target == GL_TEXTURE_2D_ARRAY_EXT); - - ambient = tObj->CompareFailValue; - - /* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */ - - function = (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) ? - tObj->CompareFunc : GL_NONE; - - if (tObj->MagFilter == GL_NEAREST) { - GLuint i; - for (i = 0; i < n; i++) { - GLfloat depthSample; - GLint col, row, slice; - - nearest_texcoord(tObj, level, texcoords[i], &col, &row, &slice); - - if (col >= 0 && row >= 0 && col < width && row < height && - slice >= 0 && slice < depth) { - img->FetchTexelf(img, col, row, slice, &depthSample); - } - else { - depthSample = tObj->BorderColor.f[0]; - } - - result = shadow_compare(function, texcoords[i][compare_coord], - depthSample, ambient); - - switch (tObj->DepthMode) { - case GL_LUMINANCE: - ASSIGN_4V(texel[i], result, result, result, 1.0F); - break; - case GL_INTENSITY: - ASSIGN_4V(texel[i], result, result, result, result); - break; - case GL_ALPHA: - ASSIGN_4V(texel[i], 0.0F, 0.0F, 0.0F, result); - break; - default: - _mesa_problem(ctx, "Bad depth texture mode"); - } - } - } - else { - GLuint i; - ASSERT(tObj->MagFilter == GL_LINEAR); - for (i = 0; i < n; i++) { - GLfloat depth00, depth01, depth10, depth11; - GLint i0, i1, j0, j1; - GLint slice; - GLfloat wi, wj; - GLuint useBorderTexel; - - linear_texcoord(tObj, level, texcoords[i], &i0, &i1, &j0, &j1, &slice, - &wi, &wj); - - useBorderTexel = 0; - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) { - j0 += img->Border; - j1 += img->Border; - } - } - else { - if (i0 < 0 || i0 >= (GLint) width) useBorderTexel |= I0BIT; - if (i1 < 0 || i1 >= (GLint) width) useBorderTexel |= I1BIT; - if (j0 < 0 || j0 >= (GLint) height) useBorderTexel |= J0BIT; - if (j1 < 0 || j1 >= (GLint) height) useBorderTexel |= J1BIT; - } - - if (slice < 0 || slice >= (GLint) depth) { - depth00 = tObj->BorderColor.f[0]; - depth01 = tObj->BorderColor.f[0]; - depth10 = tObj->BorderColor.f[0]; - depth11 = tObj->BorderColor.f[0]; - } - else { - /* get four depth samples from the texture */ - if (useBorderTexel & (I0BIT | J0BIT)) { - depth00 = tObj->BorderColor.f[0]; - } - else { - img->FetchTexelf(img, i0, j0, slice, &depth00); - } - if (useBorderTexel & (I1BIT | J0BIT)) { - depth10 = tObj->BorderColor.f[0]; - } - else { - img->FetchTexelf(img, i1, j0, slice, &depth10); - } - - if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) { - if (useBorderTexel & (I0BIT | J1BIT)) { - depth01 = tObj->BorderColor.f[0]; - } - else { - img->FetchTexelf(img, i0, j1, slice, &depth01); - } - if (useBorderTexel & (I1BIT | J1BIT)) { - depth11 = tObj->BorderColor.f[0]; - } - else { - img->FetchTexelf(img, i1, j1, slice, &depth11); - } - } - else { - depth01 = depth00; - depth11 = depth10; - } - } - - result = shadow_compare4(function, texcoords[i][compare_coord], - depth00, depth01, depth10, depth11, - ambient, wi, wj); - - switch (tObj->DepthMode) { - case GL_LUMINANCE: - ASSIGN_4V(texel[i], result, result, result, 1.0F); - break; - case GL_INTENSITY: - ASSIGN_4V(texel[i], result, result, result, result); - break; - case GL_ALPHA: - ASSIGN_4V(texel[i], 0.0F, 0.0F, 0.0F, result); - break; - default: - _mesa_problem(ctx, "Bad depth texture mode"); - } - - } /* for */ - } /* if filter */ -} - - -/** - * We use this function when a texture object is in an "incomplete" state. - * When a fragment program attempts to sample an incomplete texture we - * return black (see issue 23 in GL_ARB_fragment_program spec). - * Note: fragment programs don't observe the texture enable/disable flags. - */ -static void -null_sample_func( GLcontext *ctx, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLfloat rgba[][4]) -{ - GLuint i; - (void) ctx; - (void) tObj; - (void) texcoords; - (void) lambda; - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = 0; - rgba[i][GCOMP] = 0; - rgba[i][BCOMP] = 0; - rgba[i][ACOMP] = 1.0; - } -} - - -/** - * Choose the texture sampling function for the given texture object. - */ -texture_sample_func -_swrast_choose_texture_sample_func( GLcontext *ctx, - const struct gl_texture_object *t ) -{ - if (!t || !t->_Complete) { - return &null_sample_func; - } - else { - const GLboolean needLambda = (GLboolean) (t->MinFilter != t->MagFilter); - const GLenum format = t->Image[0][t->BaseLevel]->_BaseFormat; - - switch (t->Target) { - case GL_TEXTURE_1D: - if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) { - return &sample_depth_texture; - } - else if (needLambda) { - return &sample_lambda_1d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_1d; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_1d; - } - case GL_TEXTURE_2D: - if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) { - return &sample_depth_texture; - } - else if (needLambda) { - return &sample_lambda_2d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_2d; - } - else { - /* check for a few optimized cases */ - const struct gl_texture_image *img = t->Image[0][t->BaseLevel]; - ASSERT(t->MinFilter == GL_NEAREST); - if (t->WrapS == GL_REPEAT && - t->WrapT == GL_REPEAT && - img->_IsPowerOfTwo && - img->Border == 0 && - img->TexFormat == MESA_FORMAT_RGB888) { - return &opt_sample_rgb_2d; - } - else if (t->WrapS == GL_REPEAT && - t->WrapT == GL_REPEAT && - img->_IsPowerOfTwo && - img->Border == 0 && - img->TexFormat == MESA_FORMAT_RGBA8888) { - return &opt_sample_rgba_2d; - } - else { - return &sample_nearest_2d; - } - } - case GL_TEXTURE_3D: - if (needLambda) { - return &sample_lambda_3d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_3d; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_3d; - } - case GL_TEXTURE_CUBE_MAP: - if (needLambda) { - return &sample_lambda_cube; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_cube; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_cube; - } - case GL_TEXTURE_RECTANGLE_NV: - if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) { - return &sample_depth_texture; - } - else if (needLambda) { - return &sample_lambda_rect; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_rect; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_rect; - } - case GL_TEXTURE_1D_ARRAY_EXT: - if (needLambda) { - return &sample_lambda_1d_array; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_1d_array; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_1d_array; - } - case GL_TEXTURE_2D_ARRAY_EXT: - if (needLambda) { - return &sample_lambda_2d_array; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_2d_array; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_2d_array; - } - default: - _mesa_problem(ctx, - "invalid target in _swrast_choose_texture_sample_func"); - return &null_sample_func; - } - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.3
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/texformat.h"
+
+#include "s_context.h"
+#include "s_texfilter.h"
+
+
+/*
+ * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes
+ * see 1-pixel bands of improperly weighted linear-filtered textures.
+ * The tests/texwrap.c demo is a good test.
+ * Also note, FRAC(x) doesn't truly return the fractional part of x for x < 0.
+ * Instead, if x < 0 then FRAC(x) = 1 - true_frac(x).
+ */
+#define FRAC(f) ((f) - IFLOOR(f))
+
+
+
+/**
+ * Linear interpolation macro
+ */
+#define LERP(T, A, B) ( (A) + (T) * ((B) - (A)) )
+
+
+/**
+ * Do 2D/biliner interpolation of float values.
+ * v00, v10, v01 and v11 are typically four texture samples in a square/box.
+ * a and b are the horizontal and vertical interpolants.
+ * It's important that this function is inlined when compiled with
+ * optimization! If we find that's not true on some systems, convert
+ * to a macro.
+ */
+static INLINE GLfloat
+lerp_2d(GLfloat a, GLfloat b,
+ GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11)
+{
+ const GLfloat temp0 = LERP(a, v00, v10);
+ const GLfloat temp1 = LERP(a, v01, v11);
+ return LERP(b, temp0, temp1);
+}
+
+
+/**
+ * Do 3D/trilinear interpolation of float values.
+ * \sa lerp_2d
+ */
+static INLINE GLfloat
+lerp_3d(GLfloat a, GLfloat b, GLfloat c,
+ GLfloat v000, GLfloat v100, GLfloat v010, GLfloat v110,
+ GLfloat v001, GLfloat v101, GLfloat v011, GLfloat v111)
+{
+ const GLfloat temp00 = LERP(a, v000, v100);
+ const GLfloat temp10 = LERP(a, v010, v110);
+ const GLfloat temp01 = LERP(a, v001, v101);
+ const GLfloat temp11 = LERP(a, v011, v111);
+ const GLfloat temp0 = LERP(b, temp00, temp10);
+ const GLfloat temp1 = LERP(b, temp01, temp11);
+ return LERP(c, temp0, temp1);
+}
+
+
+/**
+ * Do linear interpolation of colors.
+ */
+static INLINE void
+lerp_rgba(GLfloat result[4], GLfloat t, const GLfloat a[4], const GLfloat b[4])
+{
+ result[0] = LERP(t, a[0], b[0]);
+ result[1] = LERP(t, a[1], b[1]);
+ result[2] = LERP(t, a[2], b[2]);
+ result[3] = LERP(t, a[3], b[3]);
+}
+
+
+/**
+ * Do bilinear interpolation of colors.
+ */
+static INLINE void
+lerp_rgba_2d(GLfloat result[4], GLfloat a, GLfloat b,
+ const GLfloat t00[4], const GLfloat t10[4],
+ const GLfloat t01[4], const GLfloat t11[4])
+{
+ result[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]);
+ result[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]);
+ result[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]);
+ result[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]);
+}
+
+
+/**
+ * Do trilinear interpolation of colors.
+ */
+static INLINE void
+lerp_rgba_3d(GLfloat result[4], GLfloat a, GLfloat b, GLfloat c,
+ const GLfloat t000[4], const GLfloat t100[4],
+ const GLfloat t010[4], const GLfloat t110[4],
+ const GLfloat t001[4], const GLfloat t101[4],
+ const GLfloat t011[4], const GLfloat t111[4])
+{
+ GLuint k;
+ /* compiler should unroll these short loops */
+ for (k = 0; k < 4; k++) {
+ result[k] = lerp_3d(a, b, c, t000[k], t100[k], t010[k], t110[k],
+ t001[k], t101[k], t011[k], t111[k]);
+ }
+}
+
+
+/**
+ * Used for GL_REPEAT wrap mode. Using A % B doesn't produce the
+ * right results for A<0. Casting to A to be unsigned only works if B
+ * is a power of two. Adding a bias to A (which is a multiple of B)
+ * avoids the problems with A < 0 (for reasonable A) without using a
+ * conditional.
+ */
+#define REMAINDER(A, B) (((A) + (B) * 1024) % (B))
+
+
+/**
+ * Used to compute texel locations for linear sampling.
+ * Input:
+ * wrapMode = GL_REPEAT, GL_CLAMP, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_BORDER
+ * s = texcoord in [0,1]
+ * size = width (or height or depth) of texture
+ * Output:
+ * i0, i1 = returns two nearest texel indexes
+ * weight = returns blend factor between texels
+ */
+static INLINE void
+linear_texel_locations(GLenum wrapMode,
+ const struct gl_texture_image *img,
+ GLint size, GLfloat s,
+ GLint *i0, GLint *i1, GLfloat *weight)
+{
+ GLfloat u;
+ switch (wrapMode) {
+ case GL_REPEAT:
+ u = s * size - 0.5F;
+ if (img->_IsPowerOfTwo) {
+ *i0 = IFLOOR(u) & (size - 1);
+ *i1 = (*i0 + 1) & (size - 1);
+ }
+ else {
+ *i0 = REMAINDER(IFLOOR(u), size);
+ *i1 = REMAINDER(*i0 + 1, size);
+ }
+ break;
+ case GL_CLAMP_TO_EDGE:
+ if (s <= 0.0F)
+ u = 0.0F;
+ else if (s >= 1.0F)
+ u = (GLfloat) size;
+ else
+ u = s * size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ if (*i0 < 0)
+ *i0 = 0;
+ if (*i1 >= (GLint) size)
+ *i1 = size - 1;
+ break;
+ case GL_CLAMP_TO_BORDER:
+ {
+ const GLfloat min = -1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ if (s <= min)
+ u = min * size;
+ else if (s >= max)
+ u = max * size;
+ else
+ u = s * size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ }
+ break;
+ case GL_MIRRORED_REPEAT:
+ {
+ const GLint flr = IFLOOR(s);
+ if (flr & 1)
+ u = 1.0F - (s - (GLfloat) flr);
+ else
+ u = s - (GLfloat) flr;
+ u = (u * size) - 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ if (*i0 < 0)
+ *i0 = 0;
+ if (*i1 >= (GLint) size)
+ *i1 = size - 1;
+ }
+ break;
+ case GL_MIRROR_CLAMP_EXT:
+ u = FABSF(s);
+ if (u >= 1.0F)
+ u = (GLfloat) size;
+ else
+ u *= size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ break;
+ case GL_MIRROR_CLAMP_TO_EDGE_EXT:
+ u = FABSF(s);
+ if (u >= 1.0F)
+ u = (GLfloat) size;
+ else
+ u *= size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ if (*i0 < 0)
+ *i0 = 0;
+ if (*i1 >= (GLint) size)
+ *i1 = size - 1;
+ break;
+ case GL_MIRROR_CLAMP_TO_BORDER_EXT:
+ {
+ const GLfloat min = -1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ u = FABSF(s);
+ if (u <= min)
+ u = min * size;
+ else if (u >= max)
+ u = max * size;
+ else
+ u *= size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ }
+ break;
+ case GL_CLAMP:
+ if (s <= 0.0F)
+ u = 0.0F;
+ else if (s >= 1.0F)
+ u = (GLfloat) size;
+ else
+ u = s * size;
+ u -= 0.5F;
+ *i0 = IFLOOR(u);
+ *i1 = *i0 + 1;
+ break;
+ default:
+ _mesa_problem(NULL, "Bad wrap mode");
+ u = 0.0F;
+ }
+ *weight = FRAC(u);
+}
+
+
+/**
+ * Used to compute texel location for nearest sampling.
+ */
+static INLINE GLint
+nearest_texel_location(GLenum wrapMode,
+ const struct gl_texture_image *img,
+ GLint size, GLfloat s)
+{
+ GLint i;
+
+ switch (wrapMode) {
+ case GL_REPEAT:
+ /* s limited to [0,1) */
+ /* i limited to [0,size-1] */
+ i = IFLOOR(s * size);
+ if (img->_IsPowerOfTwo)
+ i &= (size - 1);
+ else
+ i = REMAINDER(i, size);
+ return i;
+ case GL_CLAMP_TO_EDGE:
+ {
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const GLfloat min = 1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ if (s < min)
+ i = 0;
+ else if (s > max)
+ i = size - 1;
+ else
+ i = IFLOOR(s * size);
+ }
+ return i;
+ case GL_CLAMP_TO_BORDER:
+ {
+ /* s limited to [min,max] */
+ /* i limited to [-1, size] */
+ const GLfloat min = -1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ if (s <= min)
+ i = -1;
+ else if (s >= max)
+ i = size;
+ else
+ i = IFLOOR(s * size);
+ }
+ return i;
+ case GL_MIRRORED_REPEAT:
+ {
+ const GLfloat min = 1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ const GLint flr = IFLOOR(s);
+ GLfloat u;
+ if (flr & 1)
+ u = 1.0F - (s - (GLfloat) flr);
+ else
+ u = s - (GLfloat) flr;
+ if (u < min)
+ i = 0;
+ else if (u > max)
+ i = size - 1;
+ else
+ i = IFLOOR(u * size);
+ }
+ return i;
+ case GL_MIRROR_CLAMP_EXT:
+ {
+ /* s limited to [0,1] */
+ /* i limited to [0,size-1] */
+ const GLfloat u = FABSF(s);
+ if (u <= 0.0F)
+ i = 0;
+ else if (u >= 1.0F)
+ i = size - 1;
+ else
+ i = IFLOOR(u * size);
+ }
+ return i;
+ case GL_MIRROR_CLAMP_TO_EDGE_EXT:
+ {
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const GLfloat min = 1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ const GLfloat u = FABSF(s);
+ if (u < min)
+ i = 0;
+ else if (u > max)
+ i = size - 1;
+ else
+ i = IFLOOR(u * size);
+ }
+ return i;
+ case GL_MIRROR_CLAMP_TO_BORDER_EXT:
+ {
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const GLfloat min = -1.0F / (2.0F * size);
+ const GLfloat max = 1.0F - min;
+ const GLfloat u = FABSF(s);
+ if (u < min)
+ i = -1;
+ else if (u > max)
+ i = size;
+ else
+ i = IFLOOR(u * size);
+ }
+ return i;
+ case GL_CLAMP:
+ /* s limited to [0,1] */
+ /* i limited to [0,size-1] */
+ if (s <= 0.0F)
+ i = 0;
+ else if (s >= 1.0F)
+ i = size - 1;
+ else
+ i = IFLOOR(s * size);
+ return i;
+ default:
+ _mesa_problem(NULL, "Bad wrap mode");
+ return 0;
+ }
+}
+
+
+/* Power of two image sizes only */
+static INLINE void
+linear_repeat_texel_location(GLuint size, GLfloat s,
+ GLint *i0, GLint *i1, GLfloat *weight)
+{
+ GLfloat u = s * size - 0.5F;
+ *i0 = IFLOOR(u) & (size - 1);
+ *i1 = (*i0 + 1) & (size - 1);
+ *weight = FRAC(u);
+}
+
+
+/**
+ * Do clamp/wrap for a texture rectangle coord, GL_NEAREST filter mode.
+ */
+static INLINE GLint
+clamp_rect_coord_nearest(GLenum wrapMode, GLfloat coord, GLint max)
+{
+ switch (wrapMode) {
+ case GL_CLAMP:
+ return IFLOOR( CLAMP(coord, 0.0F, max - 1) );
+ case GL_CLAMP_TO_EDGE:
+ return IFLOOR( CLAMP(coord, 0.5F, max - 0.5F) );
+ case GL_CLAMP_TO_BORDER:
+ return IFLOOR( CLAMP(coord, -0.5F, max + 0.5F) );
+ default:
+ _mesa_problem(NULL, "bad wrapMode in clamp_rect_coord_nearest");
+ return 0;
+ }
+}
+
+
+/**
+ * As above, but GL_LINEAR filtering.
+ */
+static INLINE void
+clamp_rect_coord_linear(GLenum wrapMode, GLfloat coord, GLint max,
+ GLint *i0out, GLint *i1out, GLfloat *weight)
+{
+ GLfloat fcol;
+ GLint i0, i1;
+ switch (wrapMode) {
+ case GL_CLAMP:
+ /* Not exactly what the spec says, but it matches NVIDIA output */
+ fcol = CLAMP(coord - 0.5F, 0.0F, max - 1);
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ break;
+ case GL_CLAMP_TO_EDGE:
+ fcol = CLAMP(coord, 0.5F, max - 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ if (i1 > max - 1)
+ i1 = max - 1;
+ break;
+ case GL_CLAMP_TO_BORDER:
+ fcol = CLAMP(coord, -0.5F, max + 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ break;
+ default:
+ _mesa_problem(NULL, "bad wrapMode in clamp_rect_coord_linear");
+ i0 = i1 = 0;
+ fcol = 0.0F;
+ }
+ *i0out = i0;
+ *i1out = i1;
+ *weight = FRAC(fcol);
+}
+
+
+/**
+ * Compute slice/image to use for 1D or 2D array texture.
+ */
+static INLINE GLint
+tex_array_slice(GLfloat coord, GLsizei size)
+{
+ GLint slice = IFLOOR(coord + 0.5f);
+ slice = CLAMP(slice, 0, size - 1);
+ return slice;
+}
+
+
+/**
+ * Compute nearest integer texcoords for given texobj and coordinate.
+ * NOTE: only used for depth texture sampling.
+ */
+static INLINE void
+nearest_texcoord(const struct gl_texture_object *texObj,
+ GLuint level,
+ const GLfloat texcoord[4],
+ GLint *i, GLint *j, GLint *k)
+{
+ const struct gl_texture_image *img = texObj->Image[0][level];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ const GLint depth = img->Depth;
+
+ switch (texObj->Target) {
+ case GL_TEXTURE_RECTANGLE_ARB:
+ *i = clamp_rect_coord_nearest(texObj->WrapS, texcoord[0], width);
+ *j = clamp_rect_coord_nearest(texObj->WrapT, texcoord[1], height);
+ *k = 0;
+ break;
+ case GL_TEXTURE_1D:
+ *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]);
+ *j = 0;
+ *k = 0;
+ break;
+ case GL_TEXTURE_2D:
+ *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]);
+ *j = nearest_texel_location(texObj->WrapT, img, height, texcoord[1]);
+ *k = 0;
+ break;
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]);
+ *j = tex_array_slice(texcoord[1], height);
+ *k = 0;
+ break;
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ *i = nearest_texel_location(texObj->WrapS, img, width, texcoord[0]);
+ *j = nearest_texel_location(texObj->WrapT, img, height, texcoord[1]);
+ *k = tex_array_slice(texcoord[2], depth);
+ break;
+ default:
+ *i = *j = *k = 0;
+ }
+}
+
+
+/**
+ * Compute linear integer texcoords for given texobj and coordinate.
+ * NOTE: only used for depth texture sampling.
+ */
+static INLINE void
+linear_texcoord(const struct gl_texture_object *texObj,
+ GLuint level,
+ const GLfloat texcoord[4],
+ GLint *i0, GLint *i1, GLint *j0, GLint *j1, GLint *slice,
+ GLfloat *wi, GLfloat *wj)
+{
+ const struct gl_texture_image *img = texObj->Image[0][level];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ const GLint depth = img->Depth;
+
+ switch (texObj->Target) {
+ case GL_TEXTURE_RECTANGLE_ARB:
+ clamp_rect_coord_linear(texObj->WrapS, texcoord[0],
+ width, i0, i1, wi);
+ clamp_rect_coord_linear(texObj->WrapT, texcoord[1],
+ height, j0, j1, wj);
+ *slice = 0;
+ break;
+
+ case GL_TEXTURE_1D:
+ case GL_TEXTURE_2D:
+ linear_texel_locations(texObj->WrapS, img, width,
+ texcoord[0], i0, i1, wi);
+ linear_texel_locations(texObj->WrapT, img, height,
+ texcoord[1], j0, j1, wj);
+ *slice = 0;
+ break;
+
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ linear_texel_locations(texObj->WrapS, img, width,
+ texcoord[0], i0, i1, wi);
+ *j0 = tex_array_slice(texcoord[1], height);
+ *j1 = *j0;
+ *slice = 0;
+ break;
+
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ linear_texel_locations(texObj->WrapS, img, width,
+ texcoord[0], i0, i1, wi);
+ linear_texel_locations(texObj->WrapT, img, height,
+ texcoord[1], j0, j1, wj);
+ *slice = tex_array_slice(texcoord[2], depth);
+ break;
+
+ default:
+ *slice = 0;
+ }
+}
+
+
+
+/**
+ * For linear interpolation between mipmap levels N and N+1, this function
+ * computes N.
+ */
+static INLINE GLint
+linear_mipmap_level(const struct gl_texture_object *tObj, GLfloat lambda)
+{
+ if (lambda < 0.0F)
+ return tObj->BaseLevel;
+ else if (lambda > tObj->_MaxLambda)
+ return (GLint) (tObj->BaseLevel + tObj->_MaxLambda);
+ else
+ return (GLint) (tObj->BaseLevel + lambda);
+}
+
+
+/**
+ * Compute the nearest mipmap level to take texels from.
+ */
+static INLINE GLint
+nearest_mipmap_level(const struct gl_texture_object *tObj, GLfloat lambda)
+{
+ GLfloat l;
+ GLint level;
+ if (lambda <= 0.5F)
+ l = 0.0F;
+ else if (lambda > tObj->_MaxLambda + 0.4999F)
+ l = tObj->_MaxLambda + 0.4999F;
+ else
+ l = lambda;
+ level = (GLint) (tObj->BaseLevel + l + 0.5F);
+ if (level > tObj->_MaxLevel)
+ level = tObj->_MaxLevel;
+ return level;
+}
+
+
+
+/*
+ * Bitflags for texture border color sampling.
+ */
+#define I0BIT 1
+#define I1BIT 2
+#define J0BIT 4
+#define J1BIT 8
+#define K0BIT 16
+#define K1BIT 32
+
+
+
+/**
+ * The lambda[] array values are always monotonic. Either the whole span
+ * will be minified, magnified, or split between the two. This function
+ * determines the subranges in [0, n-1] that are to be minified or magnified.
+ */
+static INLINE void
+compute_min_mag_ranges(const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat lambda[],
+ GLuint *minStart, GLuint *minEnd,
+ GLuint *magStart, GLuint *magEnd)
+{
+ GLfloat minMagThresh;
+
+ /* we shouldn't be here if minfilter == magfilter */
+ ASSERT(tObj->MinFilter != tObj->MagFilter);
+
+ /* This bit comes from the OpenGL spec: */
+ if (tObj->MagFilter == GL_LINEAR
+ && (tObj->MinFilter == GL_NEAREST_MIPMAP_NEAREST ||
+ tObj->MinFilter == GL_NEAREST_MIPMAP_LINEAR)) {
+ minMagThresh = 0.5F;
+ }
+ else {
+ minMagThresh = 0.0F;
+ }
+
+#if 0
+ /* DEBUG CODE: Verify that lambda[] is monotonic.
+ * We can't really use this because the inaccuracy in the LOG2 function
+ * causes this test to fail, yet the resulting texturing is correct.
+ */
+ if (n > 1) {
+ GLuint i;
+ printf("lambda delta = %g\n", lambda[0] - lambda[n-1]);
+ if (lambda[0] >= lambda[n-1]) { /* decreasing */
+ for (i = 0; i < n - 1; i++) {
+ ASSERT((GLint) (lambda[i] * 10) >= (GLint) (lambda[i+1] * 10));
+ }
+ }
+ else { /* increasing */
+ for (i = 0; i < n - 1; i++) {
+ ASSERT((GLint) (lambda[i] * 10) <= (GLint) (lambda[i+1] * 10));
+ }
+ }
+ }
+#endif /* DEBUG */
+
+ if (lambda[0] <= minMagThresh && (n <= 1 || lambda[n-1] <= minMagThresh)) {
+ /* magnification for whole span */
+ *magStart = 0;
+ *magEnd = n;
+ *minStart = *minEnd = 0;
+ }
+ else if (lambda[0] > minMagThresh && (n <=1 || lambda[n-1] > minMagThresh)) {
+ /* minification for whole span */
+ *minStart = 0;
+ *minEnd = n;
+ *magStart = *magEnd = 0;
+ }
+ else {
+ /* a mix of minification and magnification */
+ GLuint i;
+ if (lambda[0] > minMagThresh) {
+ /* start with minification */
+ for (i = 1; i < n; i++) {
+ if (lambda[i] <= minMagThresh)
+ break;
+ }
+ *minStart = 0;
+ *minEnd = i;
+ *magStart = i;
+ *magEnd = n;
+ }
+ else {
+ /* start with magnification */
+ for (i = 1; i < n; i++) {
+ if (lambda[i] > minMagThresh)
+ break;
+ }
+ *magStart = 0;
+ *magEnd = i;
+ *minStart = i;
+ *minEnd = n;
+ }
+ }
+
+#if 0
+ /* Verify the min/mag Start/End values
+ * We don't use this either (see above)
+ */
+ {
+ GLint i;
+ for (i = 0; i < n; i++) {
+ if (lambda[i] > minMagThresh) {
+ /* minification */
+ ASSERT(i >= *minStart);
+ ASSERT(i < *minEnd);
+ }
+ else {
+ /* magnification */
+ ASSERT(i >= *magStart);
+ ASSERT(i < *magEnd);
+ }
+ }
+ }
+#endif
+}
+
+
+/**
+ * When we sample the border color, it must be interpreted according to
+ * the base texture format. Ex: if the texture base format it GL_ALPHA,
+ * we return (0,0,0,BorderAlpha).
+ */
+static INLINE void
+get_border_color(const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ GLfloat rgba[4])
+{
+ switch (img->_BaseFormat) {
+ case GL_RGB:
+ rgba[0] = tObj->BorderColor.f[0];
+ rgba[1] = tObj->BorderColor.f[1];
+ rgba[2] = tObj->BorderColor.f[2];
+ rgba[3] = 1.0F;
+ break;
+ case GL_ALPHA:
+ rgba[0] = rgba[1] = rgba[2] = 0.0;
+ rgba[3] = tObj->BorderColor.f[3];
+ break;
+ case GL_LUMINANCE:
+ rgba[0] = rgba[1] = rgba[2] = tObj->BorderColor.f[0];
+ rgba[3] = 1.0;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ rgba[0] = rgba[1] = rgba[2] = tObj->BorderColor.f[0];
+ rgba[3] = tObj->BorderColor.f[3];
+ break;
+ case GL_INTENSITY:
+ rgba[0] = rgba[1] = rgba[2] = rgba[3] = tObj->BorderColor.f[0];
+ break;
+ default:
+ COPY_4V(rgba, tObj->BorderColor.f);
+ }
+}
+
+
+/**********************************************************************/
+/* 1-D Texture Sampling Functions */
+/**********************************************************************/
+
+/**
+ * Return the texture sample for coordinate (s) using GL_NEAREST filter.
+ */
+static INLINE void
+sample_1d_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4], GLfloat rgba[4])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ GLint i;
+ i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]);
+ /* skip over the border, if any */
+ i += img->Border;
+ if (i < 0 || i >= (GLint) img->Width) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ get_border_color(tObj, img, rgba);
+ }
+ else {
+ img->FetchTexelf(img, i, 0, 0, rgba);
+ }
+}
+
+
+/**
+ * Return the texture sample for coordinate (s) using GL_LINEAR filter.
+ */
+static INLINE void
+sample_1d_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4], GLfloat rgba[4])
+{
+ const GLint width = img->Width2;
+ GLint i0, i1;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat a;
+ GLfloat t0[4], t1[4]; /* texels */
+
+ linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a);
+
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ }
+ else {
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ }
+
+ /* fetch texel colors */
+ if (useBorderColor & I0BIT) {
+ get_border_color(tObj, img, t0);
+ }
+ else {
+ img->FetchTexelf(img, i0, 0, 0, t0);
+ }
+ if (useBorderColor & I1BIT) {
+ get_border_color(tObj, img, t1);
+ }
+ else {
+ img->FetchTexelf(img, i1, 0, 0, t1);
+ }
+
+ lerp_rgba(rgba, a, t0, t1);
+}
+
+
+static void
+sample_1d_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4];
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_1d_linear_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4];
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample 1D texture, nearest filtering for both min/magnification */
+static void
+sample_nearest_1d( struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_1d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 1D texture, linear filtering for both min/magnification */
+static void
+sample_linear_1d( struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_1d_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 1D texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_1d( struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4] )
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ const GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ for (i = minStart; i < minEnd; i++)
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_1d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_1d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_1d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_1d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_1d_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_1d_texture");
+ return;
+ }
+ }
+}
+
+
+/**********************************************************************/
+/* 2-D Texture Sampling Functions */
+/**********************************************************************/
+
+
+/**
+ * Return the texture sample for coordinate (s,t) using GL_NEAREST filter.
+ */
+static INLINE void
+sample_2d_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ const GLint height = img->Height2; /* without border, power of two */
+ GLint i, j;
+ (void) ctx;
+
+ i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]);
+ j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]);
+
+ /* skip over the border, if any */
+ i += img->Border;
+ j += img->Border;
+
+ if (i < 0 || i >= (GLint) img->Width || j < 0 || j >= (GLint) img->Height) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ get_border_color(tObj, img, rgba);
+ }
+ else {
+ img->FetchTexelf(img, i, j, 0, rgba);
+ }
+}
+
+
+/**
+ * Return the texture sample for coordinate (s,t) using GL_LINEAR filter.
+ * New sampling code contributed by Lynn Quam <quam@ai.sri.com>.
+ */
+static INLINE void
+sample_2d_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ GLint i0, j0, i1, j1;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat a, b;
+ GLfloat t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */
+
+ linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a);
+ linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b);
+
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ j0 += img->Border;
+ j1 += img->Border;
+ }
+ else {
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT;
+ if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT;
+ }
+
+ /* fetch four texel colors */
+ if (useBorderColor & (I0BIT | J0BIT)) {
+ get_border_color(tObj, img, t00);
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, 0, t00);
+ }
+ if (useBorderColor & (I1BIT | J0BIT)) {
+ get_border_color(tObj, img, t10);
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, 0, t10);
+ }
+ if (useBorderColor & (I0BIT | J1BIT)) {
+ get_border_color(tObj, img, t01);
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, 0, t01);
+ }
+ if (useBorderColor & (I1BIT | J1BIT)) {
+ get_border_color(tObj, img, t11);
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, 0, t11);
+ }
+
+ lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11);
+}
+
+
+/**
+ * As above, but we know WRAP_S == REPEAT and WRAP_T == REPEAT.
+ * We don't have to worry about the texture border.
+ */
+static INLINE void
+sample_2d_linear_repeat(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ GLint i0, j0, i1, j1;
+ GLfloat wi, wj;
+ GLfloat t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */
+
+ (void) ctx;
+
+ ASSERT(tObj->WrapS == GL_REPEAT);
+ ASSERT(tObj->WrapT == GL_REPEAT);
+ ASSERT(img->Border == 0);
+ ASSERT(img->_BaseFormat != GL_COLOR_INDEX);
+ ASSERT(img->_IsPowerOfTwo);
+
+ linear_repeat_texel_location(width, texcoord[0], &i0, &i1, &wi);
+ linear_repeat_texel_location(height, texcoord[1], &j0, &j1, &wj);
+
+ img->FetchTexelf(img, i0, j0, 0, t00);
+ img->FetchTexelf(img, i1, j0, 0, t10);
+ img->FetchTexelf(img, i0, j1, 0, t01);
+ img->FetchTexelf(img, i1, j1, 0, t11);
+
+ lerp_rgba_2d(rgba, wi, wj, t00, t10, t01, t11);
+}
+
+
+static void
+sample_2d_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_2d_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_2d_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_2d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_2d_linear_mipmap_linear( struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4] )
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_2d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_2d_linear_mipmap_linear_repeat(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ ASSERT(tObj->WrapS == GL_REPEAT);
+ ASSERT(tObj->WrapT == GL_REPEAT);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level ],
+ texcoord[i], t0);
+ sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level+1],
+ texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample 2D texture, nearest filtering for both min/magnification */
+static void
+sample_nearest_2d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_2d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 2D texture, linear filtering for both min/magnification */
+static void
+sample_linear_2d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ if (tObj->WrapS == GL_REPEAT &&
+ tObj->WrapT == GL_REPEAT &&
+ image->_IsPowerOfTwo &&
+ image->Border == 0) {
+ for (i = 0; i < n; i++) {
+ sample_2d_linear_repeat(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ sample_2d_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+ }
+}
+
+
+/**
+ * Optimized 2-D texture sampling:
+ * S and T wrap mode == GL_REPEAT
+ * GL_NEAREST min/mag filter
+ * No border,
+ * RowStride == Width,
+ * Format = GL_RGB
+ */
+static void
+opt_sample_rgb_2d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][tObj->BaseLevel];
+ const GLfloat width = (GLfloat) img->Width;
+ const GLfloat height = (GLfloat) img->Height;
+ const GLint colMask = img->Width - 1;
+ const GLint rowMask = img->Height - 1;
+ const GLint shift = img->WidthLog2;
+ GLuint k;
+ (void) ctx;
+ (void) lambda;
+ ASSERT(tObj->WrapS==GL_REPEAT);
+ ASSERT(tObj->WrapT==GL_REPEAT);
+ ASSERT(img->Border==0);
+ ASSERT(img->TexFormat == MESA_FORMAT_RGB888);
+ ASSERT(img->_IsPowerOfTwo);
+
+ for (k=0; k<n; k++) {
+ GLint i = IFLOOR(texcoords[k][0] * width) & colMask;
+ GLint j = IFLOOR(texcoords[k][1] * height) & rowMask;
+ GLint pos = (j << shift) | i;
+ GLubyte *texel = ((GLubyte *) img->Data) + 3*pos;
+ rgba[k][RCOMP] = UBYTE_TO_FLOAT(texel[2]);
+ rgba[k][GCOMP] = UBYTE_TO_FLOAT(texel[1]);
+ rgba[k][BCOMP] = UBYTE_TO_FLOAT(texel[0]);
+ rgba[k][ACOMP] = 1.0F;
+ }
+}
+
+
+/**
+ * Optimized 2-D texture sampling:
+ * S and T wrap mode == GL_REPEAT
+ * GL_NEAREST min/mag filter
+ * No border
+ * RowStride == Width,
+ * Format = GL_RGBA
+ */
+static void
+opt_sample_rgba_2d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][tObj->BaseLevel];
+ const GLfloat width = (GLfloat) img->Width;
+ const GLfloat height = (GLfloat) img->Height;
+ const GLint colMask = img->Width - 1;
+ const GLint rowMask = img->Height - 1;
+ const GLint shift = img->WidthLog2;
+ GLuint i;
+ (void) ctx;
+ (void) lambda;
+ ASSERT(tObj->WrapS==GL_REPEAT);
+ ASSERT(tObj->WrapT==GL_REPEAT);
+ ASSERT(img->Border==0);
+ ASSERT(img->TexFormat == MESA_FORMAT_RGBA8888);
+ ASSERT(img->_IsPowerOfTwo);
+
+ for (i = 0; i < n; i++) {
+ const GLint col = IFLOOR(texcoords[i][0] * width) & colMask;
+ const GLint row = IFLOOR(texcoords[i][1] * height) & rowMask;
+ const GLint pos = (row << shift) | col;
+ const GLuint texel = *((GLuint *) img->Data + pos);
+ rgba[i][RCOMP] = UBYTE_TO_FLOAT( (texel >> 24) );
+ rgba[i][GCOMP] = UBYTE_TO_FLOAT( (texel >> 16) & 0xff );
+ rgba[i][BCOMP] = UBYTE_TO_FLOAT( (texel >> 8) & 0xff );
+ rgba[i][ACOMP] = UBYTE_TO_FLOAT( (texel ) & 0xff );
+ }
+}
+
+
+/** Sample 2D texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_2d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ const struct gl_texture_image *tImg = tObj->Image[0][tObj->BaseLevel];
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+
+ const GLboolean repeatNoBorderPOT = (tObj->WrapS == GL_REPEAT)
+ && (tObj->WrapT == GL_REPEAT)
+ && (tImg->Border == 0 && (tImg->Width == tImg->RowStride))
+ && (tImg->_BaseFormat != GL_COLOR_INDEX)
+ && tImg->_IsPowerOfTwo;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ const GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ if (repeatNoBorderPOT) {
+ switch (tImg->TexFormat) {
+ case MESA_FORMAT_RGB888:
+ opt_sample_rgb_2d(ctx, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ break;
+ case MESA_FORMAT_RGBA8888:
+ opt_sample_rgba_2d(ctx, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ break;
+ default:
+ sample_nearest_2d(ctx, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart );
+ }
+ }
+ else {
+ sample_nearest_2d(ctx, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ }
+ break;
+ case GL_LINEAR:
+ sample_linear_2d(ctx, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_2d_nearest_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_2d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_2d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ if (repeatNoBorderPOT)
+ sample_2d_linear_mipmap_linear_repeat(ctx, tObj, m,
+ texcoords + minStart, lambda + minStart, rgba + minStart);
+ else
+ sample_2d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_2d_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ const GLuint m = magEnd - magStart;
+
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ if (repeatNoBorderPOT) {
+ switch (tImg->TexFormat) {
+ case MESA_FORMAT_RGB888:
+ opt_sample_rgb_2d(ctx, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ break;
+ case MESA_FORMAT_RGBA8888:
+ opt_sample_rgba_2d(ctx, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ break;
+ default:
+ sample_nearest_2d(ctx, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart );
+ }
+ }
+ else {
+ sample_nearest_2d(ctx, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ }
+ break;
+ case GL_LINEAR:
+ sample_linear_2d(ctx, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_lambda_2d");
+ }
+ }
+}
+
+
+
+/**********************************************************************/
+/* 3-D Texture Sampling Functions */
+/**********************************************************************/
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter.
+ */
+static INLINE void
+sample_3d_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ const GLint height = img->Height2; /* without border, power of two */
+ const GLint depth = img->Depth2; /* without border, power of two */
+ GLint i, j, k;
+ (void) ctx;
+
+ i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]);
+ j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]);
+ k = nearest_texel_location(tObj->WrapR, img, depth, texcoord[2]);
+
+ if (i < 0 || i >= (GLint) img->Width ||
+ j < 0 || j >= (GLint) img->Height ||
+ k < 0 || k >= (GLint) img->Depth) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ get_border_color(tObj, img, rgba);
+ }
+ else {
+ img->FetchTexelf(img, i, j, k, rgba);
+ }
+}
+
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter.
+ */
+static void
+sample_3d_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ const GLint depth = img->Depth2;
+ GLint i0, j0, k0, i1, j1, k1;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat a, b, c;
+ GLfloat t000[4], t010[4], t001[4], t011[4];
+ GLfloat t100[4], t110[4], t101[4], t111[4];
+
+ linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a);
+ linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b);
+ linear_texel_locations(tObj->WrapR, img, depth, texcoord[2], &k0, &k1, &c);
+
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ j0 += img->Border;
+ j1 += img->Border;
+ k0 += img->Border;
+ k1 += img->Border;
+ }
+ else {
+ /* check if sampling texture border color */
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT;
+ if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT;
+ if (k0 < 0 || k0 >= depth) useBorderColor |= K0BIT;
+ if (k1 < 0 || k1 >= depth) useBorderColor |= K1BIT;
+ }
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | J0BIT | K0BIT)) {
+ get_border_color(tObj, img, t000);
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, k0, t000);
+ }
+ if (useBorderColor & (I1BIT | J0BIT | K0BIT)) {
+ get_border_color(tObj, img, t100);
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, k0, t100);
+ }
+ if (useBorderColor & (I0BIT | J1BIT | K0BIT)) {
+ get_border_color(tObj, img, t010);
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, k0, t010);
+ }
+ if (useBorderColor & (I1BIT | J1BIT | K0BIT)) {
+ get_border_color(tObj, img, t110);
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, k0, t110);
+ }
+
+ if (useBorderColor & (I0BIT | J0BIT | K1BIT)) {
+ get_border_color(tObj, img, t001);
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, k1, t001);
+ }
+ if (useBorderColor & (I1BIT | J0BIT | K1BIT)) {
+ get_border_color(tObj, img, t101);
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, k1, t101);
+ }
+ if (useBorderColor & (I0BIT | J1BIT | K1BIT)) {
+ get_border_color(tObj, img, t011);
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, k1, t011);
+ }
+ if (useBorderColor & (I1BIT | J1BIT | K1BIT)) {
+ get_border_color(tObj, img, t111);
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, k1, t111);
+ }
+
+ /* trilinear interpolation of samples */
+ lerp_rgba_3d(rgba, a, b, c, t000, t100, t010, t110, t001, t101, t011, t111);
+}
+
+
+static void
+sample_3d_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4] )
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_3d_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_3d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_3d_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_3d_linear_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_3d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_3d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample 3D texture, nearest filtering for both min/magnification */
+static void
+sample_nearest_3d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_3d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 3D texture, linear filtering for both min/magnification */
+static void
+sample_linear_3d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_3d_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 3D texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_3d(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ for (i = minStart; i < minEnd; i++)
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_3d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_3d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_3d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_3d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_3d_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_3d_texture");
+ return;
+ }
+ }
+}
+
+
+/**********************************************************************/
+/* Texture Cube Map Sampling Functions */
+/**********************************************************************/
+
+/**
+ * Choose one of six sides of a texture cube map given the texture
+ * coord (rx,ry,rz). Return pointer to corresponding array of texture
+ * images.
+ */
+static const struct gl_texture_image **
+choose_cube_face(const struct gl_texture_object *texObj,
+ const GLfloat texcoord[4], GLfloat newCoord[4])
+{
+ /*
+ major axis
+ direction target sc tc ma
+ ---------- ------------------------------- --- --- ---
+ +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx
+ -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx
+ +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry
+ -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry
+ +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz
+ -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz
+ */
+ const GLfloat rx = texcoord[0];
+ const GLfloat ry = texcoord[1];
+ const GLfloat rz = texcoord[2];
+ const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz);
+ GLuint face;
+ GLfloat sc, tc, ma;
+
+ if (arx >= ary && arx >= arz) {
+ if (rx >= 0.0F) {
+ face = FACE_POS_X;
+ sc = -rz;
+ tc = -ry;
+ ma = arx;
+ }
+ else {
+ face = FACE_NEG_X;
+ sc = rz;
+ tc = -ry;
+ ma = arx;
+ }
+ }
+ else if (ary >= arx && ary >= arz) {
+ if (ry >= 0.0F) {
+ face = FACE_POS_Y;
+ sc = rx;
+ tc = rz;
+ ma = ary;
+ }
+ else {
+ face = FACE_NEG_Y;
+ sc = rx;
+ tc = -rz;
+ ma = ary;
+ }
+ }
+ else {
+ if (rz > 0.0F) {
+ face = FACE_POS_Z;
+ sc = rx;
+ tc = -ry;
+ ma = arz;
+ }
+ else {
+ face = FACE_NEG_Z;
+ sc = -rx;
+ tc = -ry;
+ ma = arz;
+ }
+ }
+
+ {
+ const float ima = 1.0F / ma;
+ newCoord[0] = ( sc * ima + 1.0F ) * 0.5F;
+ newCoord[1] = ( tc * ima + 1.0F ) * 0.5F;
+ }
+
+ return (const struct gl_texture_image **) texObj->Image[face];
+}
+
+
+static void
+sample_nearest_cube(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint i;
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ images = choose_cube_face(tObj, texcoords[i], newCoord);
+ sample_2d_nearest(ctx, tObj, images[tObj->BaseLevel],
+ newCoord, rgba[i]);
+ }
+}
+
+
+static void
+sample_linear_cube(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ images = choose_cube_face(tObj, texcoords[i], newCoord);
+ sample_2d_linear(ctx, tObj, images[tObj->BaseLevel],
+ newCoord, rgba[i]);
+ }
+}
+
+
+static void
+sample_cube_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level;
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+
+ /* XXX we actually need to recompute lambda here based on the newCoords.
+ * But we would need the texcoords of adjacent fragments to compute that
+ * properly, and we don't have those here.
+ * For now, do an approximation: subtracting 1 from the chosen mipmap
+ * level seems to work in some test cases.
+ * The same adjustment is done in the next few functions.
+ */
+ level = nearest_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0);
+
+ sample_2d_nearest(ctx, tObj, images[level], newCoord, rgba[i]);
+ }
+}
+
+
+static void
+sample_cube_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ sample_2d_linear(ctx, tObj, images[level], newCoord, rgba[i]);
+ }
+}
+
+
+static void
+sample_cube_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_nearest(ctx, tObj, images[tObj->_MaxLevel],
+ newCoord, rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_nearest(ctx, tObj, images[level ], newCoord, t0);
+ sample_2d_nearest(ctx, tObj, images[level+1], newCoord, t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_cube_linear_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear(ctx, tObj, images[tObj->_MaxLevel],
+ newCoord, rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4];
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_linear(ctx, tObj, images[level ], newCoord, t0);
+ sample_2d_linear(ctx, tObj, images[level+1], newCoord, t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample cube texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_cube(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ const GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ sample_nearest_cube(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR:
+ sample_linear_cube(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_cube_nearest_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_cube_linear_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_cube_nearest_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_cube_linear_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_lambda_cube");
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ const GLuint m = magEnd - magStart;
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ sample_nearest_cube(ctx, tObj, m, texcoords + magStart,
+ lambda + magStart, rgba + magStart);
+ break;
+ case GL_LINEAR:
+ sample_linear_cube(ctx, tObj, m, texcoords + magStart,
+ lambda + magStart, rgba + magStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_lambda_cube");
+ }
+ }
+}
+
+
+/**********************************************************************/
+/* Texture Rectangle Sampling Functions */
+/**********************************************************************/
+
+
+static void
+sample_nearest_rect(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][0];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ GLuint i;
+
+ (void) ctx;
+ (void) lambda;
+
+ ASSERT(tObj->WrapS == GL_CLAMP ||
+ tObj->WrapS == GL_CLAMP_TO_EDGE ||
+ tObj->WrapS == GL_CLAMP_TO_BORDER);
+ ASSERT(tObj->WrapT == GL_CLAMP ||
+ tObj->WrapT == GL_CLAMP_TO_EDGE ||
+ tObj->WrapT == GL_CLAMP_TO_BORDER);
+ ASSERT(img->_BaseFormat != GL_COLOR_INDEX);
+
+ for (i = 0; i < n; i++) {
+ GLint row, col;
+ col = clamp_rect_coord_nearest(tObj->WrapS, texcoords[i][0], width);
+ row = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height);
+ if (col < 0 || col >= width || row < 0 || row >= height)
+ get_border_color(tObj, img, rgba[i]);
+ else
+ img->FetchTexelf(img, col, row, 0, rgba[i]);
+ }
+}
+
+
+static void
+sample_linear_rect(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][0];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ GLuint i;
+
+ (void) ctx;
+ (void) lambda;
+
+ ASSERT(tObj->WrapS == GL_CLAMP ||
+ tObj->WrapS == GL_CLAMP_TO_EDGE ||
+ tObj->WrapS == GL_CLAMP_TO_BORDER);
+ ASSERT(tObj->WrapT == GL_CLAMP ||
+ tObj->WrapT == GL_CLAMP_TO_EDGE ||
+ tObj->WrapT == GL_CLAMP_TO_BORDER);
+ ASSERT(img->_BaseFormat != GL_COLOR_INDEX);
+
+ for (i = 0; i < n; i++) {
+ GLint i0, j0, i1, j1;
+ GLfloat t00[4], t01[4], t10[4], t11[4];
+ GLfloat a, b;
+ GLbitfield useBorderColor = 0x0;
+
+ clamp_rect_coord_linear(tObj->WrapS, texcoords[i][0], width,
+ &i0, &i1, &a);
+ clamp_rect_coord_linear(tObj->WrapT, texcoords[i][1], height,
+ &j0, &j1, &b);
+
+ /* compute integer rows/columns */
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT;
+ if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT;
+
+ /* get four texel samples */
+ if (useBorderColor & (I0BIT | J0BIT))
+ get_border_color(tObj, img, t00);
+ else
+ img->FetchTexelf(img, i0, j0, 0, t00);
+
+ if (useBorderColor & (I1BIT | J0BIT))
+ get_border_color(tObj, img, t10);
+ else
+ img->FetchTexelf(img, i1, j0, 0, t10);
+
+ if (useBorderColor & (I0BIT | J1BIT))
+ get_border_color(tObj, img, t01);
+ else
+ img->FetchTexelf(img, i0, j1, 0, t01);
+
+ if (useBorderColor & (I1BIT | J1BIT))
+ get_border_color(tObj, img, t11);
+ else
+ img->FetchTexelf(img, i1, j1, 0, t11);
+
+ lerp_rgba_2d(rgba[i], a, b, t00, t10, t01, t11);
+ }
+}
+
+
+/** Sample Rect texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_rect(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint minStart, minEnd, magStart, magEnd;
+
+ /* We only need lambda to decide between minification and magnification.
+ * There is no mipmapping with rectangular textures.
+ */
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ if (tObj->MinFilter == GL_NEAREST) {
+ sample_nearest_rect(ctx, tObj, minEnd - minStart,
+ texcoords + minStart, NULL, rgba + minStart);
+ }
+ else {
+ sample_linear_rect(ctx, tObj, minEnd - minStart,
+ texcoords + minStart, NULL, rgba + minStart);
+ }
+ }
+ if (magStart < magEnd) {
+ if (tObj->MagFilter == GL_NEAREST) {
+ sample_nearest_rect(ctx, tObj, magEnd - magStart,
+ texcoords + magStart, NULL, rgba + magStart);
+ }
+ else {
+ sample_linear_rect(ctx, tObj, magEnd - magStart,
+ texcoords + magStart, NULL, rgba + magStart);
+ }
+ }
+}
+
+
+/**********************************************************************/
+/* 2D Texture Array Sampling Functions */
+/**********************************************************************/
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter.
+ */
+static void
+sample_2d_array_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ const GLint height = img->Height2; /* without border, power of two */
+ const GLint depth = img->Depth;
+ GLint i, j;
+ GLint array;
+ (void) ctx;
+
+ i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]);
+ j = nearest_texel_location(tObj->WrapT, img, height, texcoord[1]);
+ array = tex_array_slice(texcoord[2], depth);
+
+ if (i < 0 || i >= (GLint) img->Width ||
+ j < 0 || j >= (GLint) img->Height ||
+ array < 0 || array >= (GLint) img->Depth) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ get_border_color(tObj, img, rgba);
+ }
+ else {
+ img->FetchTexelf(img, i, j, array, rgba);
+ }
+}
+
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter.
+ */
+static void
+sample_2d_array_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ const GLint depth = img->Depth;
+ GLint i0, j0, i1, j1;
+ GLint array;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat a, b;
+ GLfloat t00[4], t01[4], t10[4], t11[4];
+
+ linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a);
+ linear_texel_locations(tObj->WrapT, img, height, texcoord[1], &j0, &j1, &b);
+ array = tex_array_slice(texcoord[2], depth);
+
+ if (array < 0 || array >= depth) {
+ COPY_4V(rgba, tObj->BorderColor.f);
+ }
+ else {
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ j0 += img->Border;
+ j1 += img->Border;
+ }
+ else {
+ /* check if sampling texture border color */
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT;
+ if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT;
+ }
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | J0BIT)) {
+ get_border_color(tObj, img, t00);
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, array, t00);
+ }
+ if (useBorderColor & (I1BIT | J0BIT)) {
+ get_border_color(tObj, img, t10);
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, array, t10);
+ }
+ if (useBorderColor & (I0BIT | J1BIT)) {
+ get_border_color(tObj, img, t01);
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, array, t01);
+ }
+ if (useBorderColor & (I1BIT | J1BIT)) {
+ get_border_color(tObj, img, t11);
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, array, t11);
+ }
+
+ /* trilinear interpolation of samples */
+ lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11);
+ }
+}
+
+
+static void
+sample_2d_array_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i],
+ rgba[i]);
+ }
+}
+
+
+static void
+sample_2d_array_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level],
+ texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_2d_array_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level ],
+ texcoord[i], t0);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level+1],
+ texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_2d_array_linear_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level ],
+ texcoord[i], t0);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level+1],
+ texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample 2D Array texture, nearest filtering for both min/magnification */
+static void
+sample_nearest_2d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_2d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+/** Sample 2D Array texture, linear filtering for both min/magnification */
+static void
+sample_linear_2d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_2d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 2D Array texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_2d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ for (i = minStart; i < minEnd; i++)
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_2d_array_nearest_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_2d_array_linear_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_2d_array_nearest_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_2d_array_linear_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_2d_array_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_2d_array_texture");
+ return;
+ }
+ }
+}
+
+
+
+
+/**********************************************************************/
+/* 1D Texture Array Sampling Functions */
+/**********************************************************************/
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter.
+ */
+static void
+sample_1d_array_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ const GLint height = img->Height;
+ GLint i;
+ GLint array;
+ (void) ctx;
+
+ i = nearest_texel_location(tObj->WrapS, img, width, texcoord[0]);
+ array = tex_array_slice(texcoord[1], height);
+
+ if (i < 0 || i >= (GLint) img->Width ||
+ array < 0 || array >= (GLint) img->Height) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ get_border_color(tObj, img, rgba);
+ }
+ else {
+ img->FetchTexelf(img, i, array, 0, rgba);
+ }
+}
+
+
+/**
+ * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter.
+ */
+static void
+sample_1d_array_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLfloat rgba[4])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height;
+ GLint i0, i1;
+ GLint array;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat a;
+ GLfloat t0[4], t1[4];
+
+ linear_texel_locations(tObj->WrapS, img, width, texcoord[0], &i0, &i1, &a);
+ array = tex_array_slice(texcoord[1], height);
+
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ }
+ else {
+ /* check if sampling texture border color */
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ }
+
+ if (array < 0 || array >= height) useBorderColor |= K0BIT;
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | K0BIT)) {
+ get_border_color(tObj, img, t0);
+ }
+ else {
+ img->FetchTexelf(img, i0, array, 0, t0);
+ }
+ if (useBorderColor & (I1BIT | K0BIT)) {
+ get_border_color(tObj, img, t1);
+ }
+ else {
+ img->FetchTexelf(img, i1, array, 0, t1);
+ }
+
+ /* bilinear interpolation of samples */
+ lerp_rgba(rgba, a, t0, t1);
+}
+
+
+static void
+sample_1d_array_nearest_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i],
+ rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_array_linear_mipmap_nearest(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level],
+ texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_array_nearest_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_1d_array_linear_mipmap_linear(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLfloat t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+/** Sample 1D Array texture, nearest filtering for both min/magnification */
+static void
+sample_nearest_1d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_1d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 1D Array texture, linear filtering for both min/magnification */
+static void
+sample_linear_1d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ sample_1d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/** Sample 1D Array texture, using lambda to choose between min/magnification */
+static void
+sample_lambda_1d_array(struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, n, lambda,
+ &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ /* do the minified texels */
+ GLuint m = minEnd - minStart;
+ switch (tObj->MinFilter) {
+ case GL_NEAREST:
+ for (i = minStart; i < minEnd; i++)
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_1d_array_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_1d_array_linear_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_1d_array_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_1d_array_linear_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_1d_array_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_1d_array_texture");
+ return;
+ }
+ }
+}
+
+
+/**
+ * Compare texcoord against depth sample. Return 1.0 or the ambient value.
+ */
+static INLINE GLfloat
+shadow_compare(GLenum function, GLfloat coord, GLfloat depthSample,
+ GLfloat ambient)
+{
+ switch (function) {
+ case GL_LEQUAL:
+ return (coord <= depthSample) ? 1.0F : ambient;
+ case GL_GEQUAL:
+ return (coord >= depthSample) ? 1.0F : ambient;
+ case GL_LESS:
+ return (coord < depthSample) ? 1.0F : ambient;
+ case GL_GREATER:
+ return (coord > depthSample) ? 1.0F : ambient;
+ case GL_EQUAL:
+ return (coord == depthSample) ? 1.0F : ambient;
+ case GL_NOTEQUAL:
+ return (coord != depthSample) ? 1.0F : ambient;
+ case GL_ALWAYS:
+ return 1.0F;
+ case GL_NEVER:
+ return ambient;
+ case GL_NONE:
+ return depthSample;
+ default:
+ _mesa_problem(NULL, "Bad compare func in shadow_compare");
+ return ambient;
+ }
+}
+
+
+/**
+ * Compare texcoord against four depth samples.
+ */
+static INLINE GLfloat
+shadow_compare4(GLenum function, GLfloat coord,
+ GLfloat depth00, GLfloat depth01,
+ GLfloat depth10, GLfloat depth11,
+ GLfloat ambient, GLfloat wi, GLfloat wj)
+{
+ const GLfloat d = (1.0F - (GLfloat) ambient) * 0.25F;
+ GLfloat luminance = 1.0F;
+
+ switch (function) {
+ case GL_LEQUAL:
+ if (depth00 <= coord) luminance -= d;
+ if (depth01 <= coord) luminance -= d;
+ if (depth10 <= coord) luminance -= d;
+ if (depth11 <= coord) luminance -= d;
+ return luminance;
+ case GL_GEQUAL:
+ if (depth00 >= coord) luminance -= d;
+ if (depth01 >= coord) luminance -= d;
+ if (depth10 >= coord) luminance -= d;
+ if (depth11 >= coord) luminance -= d;
+ return luminance;
+ case GL_LESS:
+ if (depth00 < coord) luminance -= d;
+ if (depth01 < coord) luminance -= d;
+ if (depth10 < coord) luminance -= d;
+ if (depth11 < coord) luminance -= d;
+ return luminance;
+ case GL_GREATER:
+ if (depth00 > coord) luminance -= d;
+ if (depth01 > coord) luminance -= d;
+ if (depth10 > coord) luminance -= d;
+ if (depth11 > coord) luminance -= d;
+ return luminance;
+ case GL_EQUAL:
+ if (depth00 == coord) luminance -= d;
+ if (depth01 == coord) luminance -= d;
+ if (depth10 == coord) luminance -= d;
+ if (depth11 == coord) luminance -= d;
+ return luminance;
+ case GL_NOTEQUAL:
+ if (depth00 != coord) luminance -= d;
+ if (depth01 != coord) luminance -= d;
+ if (depth10 != coord) luminance -= d;
+ if (depth11 != coord) luminance -= d;
+ return luminance;
+ case GL_ALWAYS:
+ return 0.0;
+ case GL_NEVER:
+ return ambient;
+ case GL_NONE:
+ /* ordinary bilinear filtering */
+ return lerp_2d(wi, wj, depth00, depth10, depth01, depth11);
+ default:
+ _mesa_problem(NULL, "Bad compare func in sample_depth_texture");
+ return 0.0F;
+ }
+}
+
+
+/**
+ * Choose the mipmap level to use when sampling from a depth texture.
+ */
+static int
+choose_depth_texture_level(const struct gl_texture_object *tObj, GLfloat lambda)
+{
+ GLint level;
+
+ if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
+ /* no mipmapping - use base level */
+ level = tObj->BaseLevel;
+ }
+ else {
+ /* choose mipmap level */
+ lambda = CLAMP(lambda, tObj->MinLod, tObj->MaxLod);
+ level = (GLint) lambda;
+ level = CLAMP(level, tObj->BaseLevel, tObj->_MaxLevel);
+ }
+
+ return level;
+}
+
+
+/**
+ * Sample a shadow/depth texture. This function is incomplete. It doesn't
+ * check for minification vs. magnification, etc.
+ */
+static void
+sample_depth_texture( struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat texel[][4] )
+{
+ const GLint level = choose_depth_texture_level(tObj, lambda[0]);
+ const struct gl_texture_image *img = tObj->Image[0][level];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ const GLint depth = img->Depth;
+ const GLuint compare_coord = (tObj->Target == GL_TEXTURE_2D_ARRAY_EXT)
+ ? 3 : 2;
+ GLfloat ambient;
+ GLenum function;
+ GLfloat result;
+
+ ASSERT(img->_BaseFormat == GL_DEPTH_COMPONENT ||
+ img->_BaseFormat == GL_DEPTH_STENCIL_EXT);
+
+ ASSERT(tObj->Target == GL_TEXTURE_1D ||
+ tObj->Target == GL_TEXTURE_2D ||
+ tObj->Target == GL_TEXTURE_RECTANGLE_NV ||
+ tObj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
+ tObj->Target == GL_TEXTURE_2D_ARRAY_EXT);
+
+ ambient = tObj->CompareFailValue;
+
+ /* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */
+
+ function = (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) ?
+ tObj->CompareFunc : GL_NONE;
+
+ if (tObj->MagFilter == GL_NEAREST) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLfloat depthSample;
+ GLint col, row, slice;
+
+ nearest_texcoord(tObj, level, texcoords[i], &col, &row, &slice);
+
+ if (col >= 0 && row >= 0 && col < width && row < height &&
+ slice >= 0 && slice < depth) {
+ img->FetchTexelf(img, col, row, slice, &depthSample);
+ }
+ else {
+ depthSample = tObj->BorderColor.f[0];
+ }
+
+ result = shadow_compare(function, texcoords[i][compare_coord],
+ depthSample, ambient);
+
+ switch (tObj->DepthMode) {
+ case GL_LUMINANCE:
+ ASSIGN_4V(texel[i], result, result, result, 1.0F);
+ break;
+ case GL_INTENSITY:
+ ASSIGN_4V(texel[i], result, result, result, result);
+ break;
+ case GL_ALPHA:
+ ASSIGN_4V(texel[i], 0.0F, 0.0F, 0.0F, result);
+ break;
+ case GL_RED:
+ ASSIGN_4V(texel[i], result, 0.0F, 0.0F, 1.0F);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth texture mode");
+ }
+ }
+ }
+ else {
+ GLuint i;
+ ASSERT(tObj->MagFilter == GL_LINEAR);
+ for (i = 0; i < n; i++) {
+ GLfloat depth00, depth01, depth10, depth11;
+ GLint i0, i1, j0, j1;
+ GLint slice;
+ GLfloat wi, wj;
+ GLuint useBorderTexel;
+
+ linear_texcoord(tObj, level, texcoords[i], &i0, &i1, &j0, &j1, &slice,
+ &wi, &wj);
+
+ useBorderTexel = 0;
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) {
+ j0 += img->Border;
+ j1 += img->Border;
+ }
+ }
+ else {
+ if (i0 < 0 || i0 >= (GLint) width) useBorderTexel |= I0BIT;
+ if (i1 < 0 || i1 >= (GLint) width) useBorderTexel |= I1BIT;
+ if (j0 < 0 || j0 >= (GLint) height) useBorderTexel |= J0BIT;
+ if (j1 < 0 || j1 >= (GLint) height) useBorderTexel |= J1BIT;
+ }
+
+ if (slice < 0 || slice >= (GLint) depth) {
+ depth00 = tObj->BorderColor.f[0];
+ depth01 = tObj->BorderColor.f[0];
+ depth10 = tObj->BorderColor.f[0];
+ depth11 = tObj->BorderColor.f[0];
+ }
+ else {
+ /* get four depth samples from the texture */
+ if (useBorderTexel & (I0BIT | J0BIT)) {
+ depth00 = tObj->BorderColor.f[0];
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, slice, &depth00);
+ }
+ if (useBorderTexel & (I1BIT | J0BIT)) {
+ depth10 = tObj->BorderColor.f[0];
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, slice, &depth10);
+ }
+
+ if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) {
+ if (useBorderTexel & (I0BIT | J1BIT)) {
+ depth01 = tObj->BorderColor.f[0];
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, slice, &depth01);
+ }
+ if (useBorderTexel & (I1BIT | J1BIT)) {
+ depth11 = tObj->BorderColor.f[0];
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, slice, &depth11);
+ }
+ }
+ else {
+ depth01 = depth00;
+ depth11 = depth10;
+ }
+ }
+
+ result = shadow_compare4(function, texcoords[i][compare_coord],
+ depth00, depth01, depth10, depth11,
+ ambient, wi, wj);
+
+ switch (tObj->DepthMode) {
+ case GL_LUMINANCE:
+ ASSIGN_4V(texel[i], result, result, result, 1.0F);
+ break;
+ case GL_INTENSITY:
+ ASSIGN_4V(texel[i], result, result, result, result);
+ break;
+ case GL_ALPHA:
+ ASSIGN_4V(texel[i], 0.0F, 0.0F, 0.0F, result);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth texture mode");
+ }
+
+ } /* for */
+ } /* if filter */
+}
+
+
+/**
+ * We use this function when a texture object is in an "incomplete" state.
+ * When a fragment program attempts to sample an incomplete texture we
+ * return black (see issue 23 in GL_ARB_fragment_program spec).
+ * Note: fragment programs don't observe the texture enable/disable flags.
+ */
+static void
+null_sample_func( struct gl_context *ctx,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLfloat rgba[][4])
+{
+ GLuint i;
+ (void) ctx;
+ (void) tObj;
+ (void) texcoords;
+ (void) lambda;
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = 0;
+ rgba[i][GCOMP] = 0;
+ rgba[i][BCOMP] = 0;
+ rgba[i][ACOMP] = 1.0;
+ }
+}
+
+
+/**
+ * Choose the texture sampling function for the given texture object.
+ */
+texture_sample_func
+_swrast_choose_texture_sample_func( struct gl_context *ctx,
+ const struct gl_texture_object *t )
+{
+ if (!t || !t->_Complete) {
+ return &null_sample_func;
+ }
+ else {
+ const GLboolean needLambda = (GLboolean) (t->MinFilter != t->MagFilter);
+ const GLenum format = t->Image[0][t->BaseLevel]->_BaseFormat;
+
+ switch (t->Target) {
+ case GL_TEXTURE_1D:
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
+ return &sample_depth_texture;
+ }
+ else if (needLambda) {
+ return &sample_lambda_1d;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_1d;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_1d;
+ }
+ case GL_TEXTURE_2D:
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
+ return &sample_depth_texture;
+ }
+ else if (needLambda) {
+ return &sample_lambda_2d;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_2d;
+ }
+ else {
+ /* check for a few optimized cases */
+ const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
+ ASSERT(t->MinFilter == GL_NEAREST);
+ if (t->WrapS == GL_REPEAT &&
+ t->WrapT == GL_REPEAT &&
+ img->_IsPowerOfTwo &&
+ img->Border == 0 &&
+ img->TexFormat == MESA_FORMAT_RGB888) {
+ return &opt_sample_rgb_2d;
+ }
+ else if (t->WrapS == GL_REPEAT &&
+ t->WrapT == GL_REPEAT &&
+ img->_IsPowerOfTwo &&
+ img->Border == 0 &&
+ img->TexFormat == MESA_FORMAT_RGBA8888) {
+ return &opt_sample_rgba_2d;
+ }
+ else {
+ return &sample_nearest_2d;
+ }
+ }
+ case GL_TEXTURE_3D:
+ if (needLambda) {
+ return &sample_lambda_3d;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_3d;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_3d;
+ }
+ case GL_TEXTURE_CUBE_MAP:
+ if (needLambda) {
+ return &sample_lambda_cube;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_cube;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_cube;
+ }
+ case GL_TEXTURE_RECTANGLE_NV:
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
+ return &sample_depth_texture;
+ }
+ else if (needLambda) {
+ return &sample_lambda_rect;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_rect;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_rect;
+ }
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ if (needLambda) {
+ return &sample_lambda_1d_array;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_1d_array;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_1d_array;
+ }
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ if (needLambda) {
+ return &sample_lambda_2d_array;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_2d_array;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_2d_array;
+ }
+ default:
+ _mesa_problem(ctx,
+ "invalid target in _swrast_choose_texture_sample_func");
+ return &null_sample_func;
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_texfilter.h b/mesalib/src/mesa/swrast/s_texfilter.h index eceab5965..fd7e5776f 100644 --- a/mesalib/src/mesa/swrast/s_texfilter.h +++ b/mesalib/src/mesa/swrast/s_texfilter.h @@ -1,39 +1,41 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_TEXFILTER_H -#define S_TEXFILTER_H - - -#include "main/mtypes.h" -#include "s_context.h" - - -extern texture_sample_func -_swrast_choose_texture_sample_func( GLcontext *ctx, - const struct gl_texture_object *tObj ); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_TEXFILTER_H
+#define S_TEXFILTER_H
+
+
+#include "s_context.h"
+
+struct gl_context;
+struct gl_texture_object;
+
+
+extern texture_sample_func
+_swrast_choose_texture_sample_func( struct gl_context *ctx,
+ const struct gl_texture_object *tObj );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_triangle.c b/mesalib/src/mesa/swrast/s_triangle.c index d1b369bcd..93826b7ce 100644 --- a/mesalib/src/mesa/swrast/s_triangle.c +++ b/mesalib/src/mesa/swrast/s_triangle.c @@ -1,1142 +1,1142 @@ -/* - * Mesa 3-D graphics library - * Version: 7.3 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * When the device driver doesn't implement triangle rasterization it - * can hook in _swrast_Triangle, which eventually calls one of these - * functions to draw triangles. - */ - -#include "main/glheader.h" -#include "main/context.h" -#include "main/colormac.h" -#include "main/imports.h" -#include "main/macros.h" -#include "main/texformat.h" -#include "program/prog_instruction.h" - -#include "s_aatriangle.h" -#include "s_context.h" -#include "s_feedback.h" -#include "s_span.h" -#include "s_triangle.h" - - -/** - * Test if a triangle should be culled. Used for feedback and selection mode. - * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise. - */ -GLboolean -_swrast_culltriangle( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2 ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0]; - GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1]; - GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0]; - GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1]; - GLfloat c = ex*fy-ey*fx; - - if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F) - return GL_FALSE; - - return GL_TRUE; -} - - - -/* - * Render a flat-shaded RGBA triangle. - */ -#define NAME flat_rgba_triangle -#define INTERP_Z 1 -#define SETUP_CODE \ - ASSERT(ctx->Texture._EnabledCoordUnits == 0);\ - ASSERT(ctx->Light.ShadeModel==GL_FLAT); \ - span.interpMask |= SPAN_RGBA; \ - span.red = ChanToFixed(v2->color[0]); \ - span.green = ChanToFixed(v2->color[1]); \ - span.blue = ChanToFixed(v2->color[2]); \ - span.alpha = ChanToFixed(v2->color[3]); \ - span.redStep = 0; \ - span.greenStep = 0; \ - span.blueStep = 0; \ - span.alphaStep = 0; -#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); -#include "s_tritemp.h" - - - -/* - * Render a smooth-shaded RGBA triangle. - */ -#define NAME smooth_rgba_triangle -#define INTERP_Z 1 -#define INTERP_RGB 1 -#define INTERP_ALPHA 1 -#define SETUP_CODE \ - { \ - /* texturing must be off */ \ - ASSERT(ctx->Texture._EnabledCoordUnits == 0); \ - ASSERT(ctx->Light.ShadeModel==GL_SMOOTH); \ - } -#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); -#include "s_tritemp.h" - - - -/* - * Render an RGB, GL_DECAL, textured triangle. - * Interpolate S,T only w/out mipmapping or perspective correction. - * - * No fog. No depth testing. - */ -#define NAME simple_textured_triangle -#define INTERP_INT_TEX 1 -#define S_SCALE twidth -#define T_SCALE theight - -#define SETUP_CODE \ - struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \ - const struct gl_texture_object *obj = \ - ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ - const struct gl_texture_image *texImg = \ - obj->Image[0][obj->BaseLevel]; \ - const GLfloat twidth = (GLfloat) texImg->Width; \ - const GLfloat theight = (GLfloat) texImg->Height; \ - const GLint twidth_log2 = texImg->WidthLog2; \ - const GLubyte *texture = (const GLubyte *) texImg->Data; \ - const GLint smask = texImg->Width - 1; \ - const GLint tmask = texImg->Height - 1; \ - ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \ - if (!rb || !texture) { \ - return; \ - } - -#define RENDER_SPAN( span ) \ - GLuint i; \ - GLubyte rgb[MAX_WIDTH][3]; \ - span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \ - span.intTex[1] -= FIXED_HALF; \ - for (i = 0; i < span.end; i++) { \ - GLint s = FixedToInt(span.intTex[0]) & smask; \ - GLint t = FixedToInt(span.intTex[1]) & tmask; \ - GLint pos = (t << twidth_log2) + s; \ - pos = pos + pos + pos; /* multiply by 3 */ \ - rgb[i][RCOMP] = texture[pos+2]; \ - rgb[i][GCOMP] = texture[pos+1]; \ - rgb[i][BCOMP] = texture[pos+0]; \ - span.intTex[0] += span.intTexStep[0]; \ - span.intTex[1] += span.intTexStep[1]; \ - } \ - rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL); - -#include "s_tritemp.h" - - - -/* - * Render an RGB, GL_DECAL, textured triangle. - * Interpolate S,T, GL_LESS depth test, w/out mipmapping or - * perspective correction. - * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE) - * - * No fog. - */ -#define NAME simple_z_textured_triangle -#define INTERP_Z 1 -#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE -#define INTERP_INT_TEX 1 -#define S_SCALE twidth -#define T_SCALE theight - -#define SETUP_CODE \ - struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \ - const struct gl_texture_object *obj = \ - ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ - const struct gl_texture_image *texImg = \ - obj->Image[0][obj->BaseLevel]; \ - const GLfloat twidth = (GLfloat) texImg->Width; \ - const GLfloat theight = (GLfloat) texImg->Height; \ - const GLint twidth_log2 = texImg->WidthLog2; \ - const GLubyte *texture = (const GLubyte *) texImg->Data; \ - const GLint smask = texImg->Width - 1; \ - const GLint tmask = texImg->Height - 1; \ - ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \ - if (!rb || !texture) { \ - return; \ - } - -#define RENDER_SPAN( span ) \ - GLuint i; \ - GLubyte rgb[MAX_WIDTH][3]; \ - span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \ - span.intTex[1] -= FIXED_HALF; \ - for (i = 0; i < span.end; i++) { \ - const GLuint z = FixedToDepth(span.z); \ - if (z < zRow[i]) { \ - GLint s = FixedToInt(span.intTex[0]) & smask; \ - GLint t = FixedToInt(span.intTex[1]) & tmask; \ - GLint pos = (t << twidth_log2) + s; \ - pos = pos + pos + pos; /* multiply by 3 */ \ - rgb[i][RCOMP] = texture[pos+2]; \ - rgb[i][GCOMP] = texture[pos+1]; \ - rgb[i][BCOMP] = texture[pos+0]; \ - zRow[i] = z; \ - span.array->mask[i] = 1; \ - } \ - else { \ - span.array->mask[i] = 0; \ - } \ - span.intTex[0] += span.intTexStep[0]; \ - span.intTex[1] += span.intTexStep[1]; \ - span.z += span.zStep; \ - } \ - rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask); - -#include "s_tritemp.h" - - -#if CHAN_TYPE != GL_FLOAT - -struct affine_info -{ - GLenum filter; - GLenum format; - GLenum envmode; - GLint smask, tmask; - GLint twidth_log2; - const GLchan *texture; - GLfixed er, eg, eb, ea; - GLint tbytesline, tsize; -}; - - -static INLINE GLint -ilerp(GLint t, GLint a, GLint b) -{ - return a + ((t * (b - a)) >> FIXED_SHIFT); -} - -static INLINE GLint -ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11) -{ - const GLint temp0 = ilerp(ia, v00, v10); - const GLint temp1 = ilerp(ia, v01, v11); - return ilerp(ib, temp0, temp1); -} - - -/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA - * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD - * texture env modes. - */ -static INLINE void -affine_span(GLcontext *ctx, SWspan *span, - struct affine_info *info) -{ - GLchan sample[4]; /* the filtered texture sample */ - const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits; - - /* Instead of defining a function for each mode, a test is done - * between the outer and inner loops. This is to reduce code size - * and complexity. Observe that an optimizing compiler kills - * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST). - */ - -#define NEAREST_RGB \ - sample[RCOMP] = tex00[2]; \ - sample[GCOMP] = tex00[1]; \ - sample[BCOMP] = tex00[0]; \ - sample[ACOMP] = CHAN_MAX; - -#define LINEAR_RGB \ - sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\ - sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\ - sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\ - sample[ACOMP] = CHAN_MAX; - -#define NEAREST_RGBA \ - sample[RCOMP] = tex00[3]; \ - sample[GCOMP] = tex00[2]; \ - sample[BCOMP] = tex00[1]; \ - sample[ACOMP] = tex00[0]; - -#define LINEAR_RGBA \ - sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\ - sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\ - sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\ - sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]) - -#define MODULATE \ - dest[RCOMP] = span->red * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \ - dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \ - dest[BCOMP] = span->blue * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \ - dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8) - -#define DECAL \ - dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red + \ - ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT)) \ - >> (FIXED_SHIFT + 8); \ - dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green + \ - ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT)) \ - >> (FIXED_SHIFT + 8); \ - dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue + \ - ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT)) \ - >> (FIXED_SHIFT + 8); \ - dest[ACOMP] = FixedToInt(span->alpha) - -#define BLEND \ - dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red \ - + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8); \ - dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green \ - + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8); \ - dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue \ - + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8); \ - dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8) - -#define REPLACE COPY_CHAN4(dest, sample) - -#define ADD \ - { \ - GLint rSum = FixedToInt(span->red) + (GLint) sample[RCOMP]; \ - GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP]; \ - GLint bSum = FixedToInt(span->blue) + (GLint) sample[BCOMP]; \ - dest[RCOMP] = MIN2(rSum, CHAN_MAX); \ - dest[GCOMP] = MIN2(gSum, CHAN_MAX); \ - dest[BCOMP] = MIN2(bSum, CHAN_MAX); \ - dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \ - } - -/* shortcuts */ - -#define NEAREST_RGB_REPLACE \ - NEAREST_RGB; \ - dest[0] = sample[0]; \ - dest[1] = sample[1]; \ - dest[2] = sample[2]; \ - dest[3] = FixedToInt(span->alpha); - -#define NEAREST_RGBA_REPLACE \ - dest[RCOMP] = tex00[3]; \ - dest[GCOMP] = tex00[2]; \ - dest[BCOMP] = tex00[1]; \ - dest[ACOMP] = tex00[0] - -#define SPAN_NEAREST(DO_TEX, COMPS) \ - for (i = 0; i < span->end; i++) { \ - /* Isn't it necessary to use FixedFloor below?? */ \ - GLint s = FixedToInt(span->intTex[0]) & info->smask; \ - GLint t = FixedToInt(span->intTex[1]) & info->tmask; \ - GLint pos = (t << info->twidth_log2) + s; \ - const GLchan *tex00 = info->texture + COMPS * pos; \ - DO_TEX; \ - span->red += span->redStep; \ - span->green += span->greenStep; \ - span->blue += span->blueStep; \ - span->alpha += span->alphaStep; \ - span->intTex[0] += span->intTexStep[0]; \ - span->intTex[1] += span->intTexStep[1]; \ - dest += 4; \ - } - -#define SPAN_LINEAR(DO_TEX, COMPS) \ - for (i = 0; i < span->end; i++) { \ - /* Isn't it necessary to use FixedFloor below?? */ \ - const GLint s = FixedToInt(span->intTex[0]) & info->smask; \ - const GLint t = FixedToInt(span->intTex[1]) & info->tmask; \ - const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK; \ - const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK; \ - const GLint pos = (t << info->twidth_log2) + s; \ - const GLchan *tex00 = info->texture + COMPS * pos; \ - const GLchan *tex10 = tex00 + info->tbytesline; \ - const GLchan *tex01 = tex00 + COMPS; \ - const GLchan *tex11 = tex10 + COMPS; \ - if (t == info->tmask) { \ - tex10 -= info->tsize; \ - tex11 -= info->tsize; \ - } \ - if (s == info->smask) { \ - tex01 -= info->tbytesline; \ - tex11 -= info->tbytesline; \ - } \ - DO_TEX; \ - span->red += span->redStep; \ - span->green += span->greenStep; \ - span->blue += span->blueStep; \ - span->alpha += span->alphaStep; \ - span->intTex[0] += span->intTexStep[0]; \ - span->intTex[1] += span->intTexStep[1]; \ - dest += 4; \ - } - - - GLuint i; - GLchan *dest = span->array->rgba[0]; - - /* Disable tex units so they're not re-applied in swrast_write_rgba_span */ - ctx->Texture._EnabledCoordUnits = 0x0; - - span->intTex[0] -= FIXED_HALF; - span->intTex[1] -= FIXED_HALF; - switch (info->filter) { - case GL_NEAREST: - switch (info->format) { - case MESA_FORMAT_RGB888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_NEAREST(NEAREST_RGB;MODULATE,3); - break; - case GL_DECAL: - case GL_REPLACE: - SPAN_NEAREST(NEAREST_RGB_REPLACE,3); - break; - case GL_BLEND: - SPAN_NEAREST(NEAREST_RGB;BLEND,3); - break; - case GL_ADD: - SPAN_NEAREST(NEAREST_RGB;ADD,3); - break; - default: - _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR"); - return; - } - break; - case MESA_FORMAT_RGBA8888: - switch(info->envmode) { - case GL_MODULATE: - SPAN_NEAREST(NEAREST_RGBA;MODULATE,4); - break; - case GL_DECAL: - SPAN_NEAREST(NEAREST_RGBA;DECAL,4); - break; - case GL_BLEND: - SPAN_NEAREST(NEAREST_RGBA;BLEND,4); - break; - case GL_ADD: - SPAN_NEAREST(NEAREST_RGBA;ADD,4); - break; - case GL_REPLACE: - SPAN_NEAREST(NEAREST_RGBA_REPLACE,4); - break; - default: - _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR"); - return; - } - break; - } - break; - - case GL_LINEAR: - span->intTex[0] -= FIXED_HALF; - span->intTex[1] -= FIXED_HALF; - switch (info->format) { - case MESA_FORMAT_RGB888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_LINEAR(LINEAR_RGB;MODULATE,3); - break; - case GL_DECAL: - case GL_REPLACE: - SPAN_LINEAR(LINEAR_RGB;REPLACE,3); - break; - case GL_BLEND: - SPAN_LINEAR(LINEAR_RGB;BLEND,3); - break; - case GL_ADD: - SPAN_LINEAR(LINEAR_RGB;ADD,3); - break; - default: - _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR"); - return; - } - break; - case MESA_FORMAT_RGBA8888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_LINEAR(LINEAR_RGBA;MODULATE,4); - break; - case GL_DECAL: - SPAN_LINEAR(LINEAR_RGBA;DECAL,4); - break; - case GL_BLEND: - SPAN_LINEAR(LINEAR_RGBA;BLEND,4); - break; - case GL_ADD: - SPAN_LINEAR(LINEAR_RGBA;ADD,4); - break; - case GL_REPLACE: - SPAN_LINEAR(LINEAR_RGBA;REPLACE,4); - break; - default: - _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR"); - return; - } - break; - } - break; - } - span->interpMask &= ~SPAN_RGBA; - ASSERT(span->arrayMask & SPAN_RGBA); - - _swrast_write_rgba_span(ctx, span); - - /* re-enable texture units */ - ctx->Texture._EnabledCoordUnits = texEnableSave; - -#undef SPAN_NEAREST -#undef SPAN_LINEAR -} - - - -/* - * Render an RGB/RGBA textured triangle without perspective correction. - */ -#define NAME affine_textured_triangle -#define INTERP_Z 1 -#define INTERP_RGB 1 -#define INTERP_ALPHA 1 -#define INTERP_INT_TEX 1 -#define S_SCALE twidth -#define T_SCALE theight - -#define SETUP_CODE \ - struct affine_info info; \ - struct gl_texture_unit *unit = ctx->Texture.Unit+0; \ - const struct gl_texture_object *obj = \ - ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ - const struct gl_texture_image *texImg = \ - obj->Image[0][obj->BaseLevel]; \ - const GLfloat twidth = (GLfloat) texImg->Width; \ - const GLfloat theight = (GLfloat) texImg->Height; \ - info.texture = (const GLchan *) texImg->Data; \ - info.twidth_log2 = texImg->WidthLog2; \ - info.smask = texImg->Width - 1; \ - info.tmask = texImg->Height - 1; \ - info.format = texImg->TexFormat; \ - info.filter = obj->MinFilter; \ - info.envmode = unit->EnvMode; \ - info.er = 0; \ - info.eg = 0; \ - info.eb = 0; \ - span.arrayMask |= SPAN_RGBA; \ - \ - if (info.envmode == GL_BLEND) { \ - /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \ - info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \ - info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \ - info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \ - info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \ - } \ - if (!info.texture) { \ - /* this shouldn't happen */ \ - return; \ - } \ - \ - switch (info.format) { \ - case MESA_FORMAT_RGB888: \ - info.tbytesline = texImg->Width * 3; \ - break; \ - case MESA_FORMAT_RGBA8888: \ - info.tbytesline = texImg->Width * 4; \ - break; \ - default: \ - _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\ - return; \ - } \ - info.tsize = texImg->Height * info.tbytesline; - -#define RENDER_SPAN( span ) affine_span(ctx, &span, &info); - -#include "s_tritemp.h" - - - -struct persp_info -{ - GLenum filter; - GLenum format; - GLenum envmode; - GLint smask, tmask; - GLint twidth_log2; - const GLchan *texture; - GLfixed er, eg, eb, ea; /* texture env color */ - GLint tbytesline, tsize; -}; - - -static INLINE void -fast_persp_span(GLcontext *ctx, SWspan *span, - struct persp_info *info) -{ - GLchan sample[4]; /* the filtered texture sample */ - - /* Instead of defining a function for each mode, a test is done - * between the outer and inner loops. This is to reduce code size - * and complexity. Observe that an optimizing compiler kills - * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST). - */ -#define SPAN_NEAREST(DO_TEX,COMP) \ - for (i = 0; i < span->end; i++) { \ - GLdouble invQ = tex_coord[2] ? \ - (1.0 / tex_coord[2]) : 1.0; \ - GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \ - GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \ - GLint s = IFLOOR(s_tmp) & info->smask; \ - GLint t = IFLOOR(t_tmp) & info->tmask; \ - GLint pos = (t << info->twidth_log2) + s; \ - const GLchan *tex00 = info->texture + COMP * pos; \ - DO_TEX; \ - span->red += span->redStep; \ - span->green += span->greenStep; \ - span->blue += span->blueStep; \ - span->alpha += span->alphaStep; \ - tex_coord[0] += tex_step[0]; \ - tex_coord[1] += tex_step[1]; \ - tex_coord[2] += tex_step[2]; \ - dest += 4; \ - } - -#define SPAN_LINEAR(DO_TEX,COMP) \ - for (i = 0; i < span->end; i++) { \ - GLdouble invQ = tex_coord[2] ? \ - (1.0 / tex_coord[2]) : 1.0; \ - const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \ - const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \ - const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF; \ - const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF; \ - const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask; \ - const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask; \ - const GLfixed sf = s_fix & FIXED_FRAC_MASK; \ - const GLfixed tf = t_fix & FIXED_FRAC_MASK; \ - const GLint pos = (t << info->twidth_log2) + s; \ - const GLchan *tex00 = info->texture + COMP * pos; \ - const GLchan *tex10 = tex00 + info->tbytesline; \ - const GLchan *tex01 = tex00 + COMP; \ - const GLchan *tex11 = tex10 + COMP; \ - if (t == info->tmask) { \ - tex10 -= info->tsize; \ - tex11 -= info->tsize; \ - } \ - if (s == info->smask) { \ - tex01 -= info->tbytesline; \ - tex11 -= info->tbytesline; \ - } \ - DO_TEX; \ - span->red += span->redStep; \ - span->green += span->greenStep; \ - span->blue += span->blueStep; \ - span->alpha += span->alphaStep; \ - tex_coord[0] += tex_step[0]; \ - tex_coord[1] += tex_step[1]; \ - tex_coord[2] += tex_step[2]; \ - dest += 4; \ - } - - GLuint i; - GLfloat tex_coord[3], tex_step[3]; - GLchan *dest = span->array->rgba[0]; - - const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits; - ctx->Texture._EnabledCoordUnits = 0; - - tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0] * (info->smask + 1); - tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1); - tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1); - tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1); - /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */ - tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3]; - tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3]; - - switch (info->filter) { - case GL_NEAREST: - switch (info->format) { - case MESA_FORMAT_RGB888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_NEAREST(NEAREST_RGB;MODULATE,3); - break; - case GL_DECAL: - case GL_REPLACE: - SPAN_NEAREST(NEAREST_RGB_REPLACE,3); - break; - case GL_BLEND: - SPAN_NEAREST(NEAREST_RGB;BLEND,3); - break; - case GL_ADD: - SPAN_NEAREST(NEAREST_RGB;ADD,3); - break; - default: - _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR"); - return; - } - break; - case MESA_FORMAT_RGBA8888: - switch(info->envmode) { - case GL_MODULATE: - SPAN_NEAREST(NEAREST_RGBA;MODULATE,4); - break; - case GL_DECAL: - SPAN_NEAREST(NEAREST_RGBA;DECAL,4); - break; - case GL_BLEND: - SPAN_NEAREST(NEAREST_RGBA;BLEND,4); - break; - case GL_ADD: - SPAN_NEAREST(NEAREST_RGBA;ADD,4); - break; - case GL_REPLACE: - SPAN_NEAREST(NEAREST_RGBA_REPLACE,4); - break; - default: - _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR"); - return; - } - break; - } - break; - - case GL_LINEAR: - switch (info->format) { - case MESA_FORMAT_RGB888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_LINEAR(LINEAR_RGB;MODULATE,3); - break; - case GL_DECAL: - case GL_REPLACE: - SPAN_LINEAR(LINEAR_RGB;REPLACE,3); - break; - case GL_BLEND: - SPAN_LINEAR(LINEAR_RGB;BLEND,3); - break; - case GL_ADD: - SPAN_LINEAR(LINEAR_RGB;ADD,3); - break; - default: - _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR"); - return; - } - break; - case MESA_FORMAT_RGBA8888: - switch (info->envmode) { - case GL_MODULATE: - SPAN_LINEAR(LINEAR_RGBA;MODULATE,4); - break; - case GL_DECAL: - SPAN_LINEAR(LINEAR_RGBA;DECAL,4); - break; - case GL_BLEND: - SPAN_LINEAR(LINEAR_RGBA;BLEND,4); - break; - case GL_ADD: - SPAN_LINEAR(LINEAR_RGBA;ADD,4); - break; - case GL_REPLACE: - SPAN_LINEAR(LINEAR_RGBA;REPLACE,4); - break; - default: - _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR"); - return; - } - break; - } - break; - } - - ASSERT(span->arrayMask & SPAN_RGBA); - _swrast_write_rgba_span(ctx, span); - -#undef SPAN_NEAREST -#undef SPAN_LINEAR - - /* restore state */ - ctx->Texture._EnabledCoordUnits = texEnableSave; -} - - -/* - * Render an perspective corrected RGB/RGBA textured triangle. - * The Q (aka V in Mesa) coordinate must be zero such that the divide - * by interpolated Q/W comes out right. - * - */ -#define NAME persp_textured_triangle -#define INTERP_Z 1 -#define INTERP_RGB 1 -#define INTERP_ALPHA 1 -#define INTERP_ATTRIBS 1 - -#define SETUP_CODE \ - struct persp_info info; \ - const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \ - const struct gl_texture_object *obj = \ - ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ - const struct gl_texture_image *texImg = \ - obj->Image[0][obj->BaseLevel]; \ - info.texture = (const GLchan *) texImg->Data; \ - info.twidth_log2 = texImg->WidthLog2; \ - info.smask = texImg->Width - 1; \ - info.tmask = texImg->Height - 1; \ - info.format = texImg->TexFormat; \ - info.filter = obj->MinFilter; \ - info.envmode = unit->EnvMode; \ - info.er = 0; \ - info.eg = 0; \ - info.eb = 0; \ - \ - if (info.envmode == GL_BLEND) { \ - /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \ - info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \ - info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \ - info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \ - info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \ - } \ - if (!info.texture) { \ - /* this shouldn't happen */ \ - return; \ - } \ - \ - switch (info.format) { \ - case MESA_FORMAT_RGB888: \ - info.tbytesline = texImg->Width * 3; \ - break; \ - case MESA_FORMAT_RGBA8888: \ - info.tbytesline = texImg->Width * 4; \ - break; \ - default: \ - _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\ - return; \ - } \ - info.tsize = texImg->Height * info.tbytesline; - -#define RENDER_SPAN( span ) \ - span.interpMask &= ~SPAN_RGBA; \ - span.arrayMask |= SPAN_RGBA; \ - fast_persp_span(ctx, &span, &info); - -#include "s_tritemp.h" - -#endif /*CHAN_TYPE != GL_FLOAT*/ - - - -/* - * Render an RGBA triangle with arbitrary attributes. - */ -#define NAME general_triangle -#define INTERP_Z 1 -#define INTERP_RGB 1 -#define INTERP_ALPHA 1 -#define INTERP_ATTRIBS 1 -#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); -#include "s_tritemp.h" - - - - -/* - * Special tri function for occlusion testing - */ -#define NAME occlusion_zless_triangle -#define INTERP_Z 1 -#define SETUP_CODE \ - struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer; \ - struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; \ - ASSERT(ctx->Depth.Test); \ - ASSERT(!ctx->Depth.Mask); \ - ASSERT(ctx->Depth.Func == GL_LESS); \ - if (!q) { \ - return; \ - } -#define RENDER_SPAN( span ) \ - if (rb->Format == MESA_FORMAT_Z16) { \ - GLuint i; \ - const GLushort *zRow = (const GLushort *) \ - rb->GetPointer(ctx, rb, span.x, span.y); \ - for (i = 0; i < span.end; i++) { \ - GLuint z = FixedToDepth(span.z); \ - if (z < zRow[i]) { \ - q->Result++; \ - } \ - span.z += span.zStep; \ - } \ - } \ - else { \ - GLuint i; \ - const GLuint *zRow = (const GLuint *) \ - rb->GetPointer(ctx, rb, span.x, span.y); \ - for (i = 0; i < span.end; i++) { \ - if ((GLuint)span.z < zRow[i]) { \ - q->Result++; \ - } \ - span.z += span.zStep; \ - } \ - } -#include "s_tritemp.h" - - - -static void -nodraw_triangle( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2 ) -{ - (void) (ctx && v0 && v1 && v2); -} - - -/* - * This is used when separate specular color is enabled, but not - * texturing. We add the specular color to the primary color, - * draw the triangle, then restore the original primary color. - * Inefficient, but seldom needed. - */ -void -_swrast_add_spec_terms_triangle(GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2) -{ - SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */ - SWvertex *ncv1 = (SWvertex *)v1; - SWvertex *ncv2 = (SWvertex *)v2; - GLfloat rSum, gSum, bSum; - GLchan cSave[3][4]; - - /* save original colors */ - COPY_CHAN4( cSave[0], ncv0->color ); - COPY_CHAN4( cSave[1], ncv1->color ); - COPY_CHAN4( cSave[2], ncv2->color ); - /* sum v0 */ - rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum); - /* sum v1 */ - rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum); - /* sum v2 */ - rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0]; - gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1]; - bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2]; - UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum); - UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum); - /* draw */ - SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 ); - /* restore original colors */ - COPY_CHAN4( ncv0->color, cSave[0] ); - COPY_CHAN4( ncv1->color, cSave[1] ); - COPY_CHAN4( ncv2->color, cSave[2] ); -} - - - -#ifdef DEBUG - -/* record the current triangle function name */ -const char *_mesa_triFuncName = NULL; - -#define USE(triFunc) \ -do { \ - _mesa_triFuncName = #triFunc; \ - /*printf("%s\n", _mesa_triFuncName);*/ \ - swrast->Triangle = triFunc; \ -} while (0) - -#else - -#define USE(triFunc) swrast->Triangle = triFunc; - -#endif - - - - -/* - * Determine which triangle rendering function to use given the current - * rendering context. - * - * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or - * remove tests to this code. - */ -void -_swrast_choose_triangle( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - - if (ctx->Polygon.CullFlag && - ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) { - USE(nodraw_triangle); - return; - } - - if (ctx->RenderMode==GL_RENDER) { - - if (ctx->Polygon.SmoothFlag) { - _swrast_set_aa_triangle_function(ctx); - ASSERT(swrast->Triangle); - return; - } - - /* special case for occlusion testing */ - if (ctx->Query.CurrentOcclusionObject && - ctx->Depth.Test && - ctx->Depth.Mask == GL_FALSE && - ctx->Depth.Func == GL_LESS && - !ctx->Stencil._Enabled) { - if (ctx->Color.ColorMask[0][0] == 0 && - ctx->Color.ColorMask[0][1] == 0 && - ctx->Color.ColorMask[0][2] == 0 && - ctx->Color.ColorMask[0][3] == 0) { - USE(occlusion_zless_triangle); - return; - } - } - - /* - * XXX should examine swrast->_ActiveAttribMask to determine what - * needs to be interpolated. - */ - if (ctx->Texture._EnabledCoordUnits || - ctx->FragmentProgram._Current || - ctx->ATIFragmentShader._Enabled || - NEED_SECONDARY_COLOR(ctx) || - swrast->_FogEnabled) { - /* Ugh, we do a _lot_ of tests to pick the best textured tri func */ - const struct gl_texture_object *texObj2D; - const struct gl_texture_image *texImg; - GLenum minFilter, magFilter, envMode; - gl_format format; - texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; - - texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL; - format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE; - minFilter = texObj2D ? texObj2D->MinFilter : GL_NONE; - magFilter = texObj2D ? texObj2D->MagFilter : GL_NONE; - envMode = ctx->Texture.Unit[0].EnvMode; - - /* First see if we can use an optimized 2-D texture function */ - if (ctx->Texture._EnabledCoordUnits == 0x1 - && !ctx->FragmentProgram._Current - && !ctx->ATIFragmentShader._Enabled - && ctx->Texture._EnabledUnits == 0x1 - && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT - && texObj2D->WrapS == GL_REPEAT - && texObj2D->WrapT == GL_REPEAT - && texObj2D->_Swizzle == SWIZZLE_NOOP - && texImg->_IsPowerOfTwo - && texImg->Border == 0 - && texImg->Width == texImg->RowStride - && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888) - && minFilter == magFilter - && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR - && !swrast->_FogEnabled - && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT - && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) { - if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) { - if (minFilter == GL_NEAREST - && format == MESA_FORMAT_RGB888 - && (envMode == GL_REPLACE || envMode == GL_DECAL) - && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT) - && ctx->Depth.Func == GL_LESS - && ctx->Depth.Mask == GL_TRUE) - || swrast->_RasterMask == TEXTURE_BIT) - && ctx->Polygon.StippleFlag == GL_FALSE - && ctx->DrawBuffer->Visual.depthBits <= 16) { - if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) { - USE(simple_z_textured_triangle); - } - else { - USE(simple_textured_triangle); - } - } - else { -#if CHAN_BITS != 8 - USE(general_triangle); -#else - if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) { - /* We only handle RGBA8888 correctly on little endian - * in the optimized code above. - */ - USE(general_triangle); - } - else { - USE(affine_textured_triangle); - } -#endif - } - } - else { -#if CHAN_BITS != 8 - USE(general_triangle); -#else - USE(persp_textured_triangle); -#endif - } - } - else { - /* general case textured triangles */ - USE(general_triangle); - } - } - else { - ASSERT(!swrast->_FogEnabled); - ASSERT(!NEED_SECONDARY_COLOR(ctx)); - if (ctx->Light.ShadeModel==GL_SMOOTH) { - /* smooth shaded, no texturing, stippled or some raster ops */ -#if CHAN_BITS != 8 - USE(general_triangle); -#else - USE(smooth_rgba_triangle); -#endif - } - else { - /* flat shaded, no texturing, stippled or some raster ops */ -#if CHAN_BITS != 8 - USE(general_triangle); -#else - USE(flat_rgba_triangle); -#endif - } - } - } - else if (ctx->RenderMode==GL_FEEDBACK) { - USE(_swrast_feedback_triangle); - } - else { - /* GL_SELECT mode */ - USE(_swrast_select_triangle); - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * When the device driver doesn't implement triangle rasterization it
+ * can hook in _swrast_Triangle, which eventually calls one of these
+ * functions to draw triangles.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/texformat.h"
+#include "program/prog_instruction.h"
+
+#include "s_aatriangle.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_span.h"
+#include "s_triangle.h"
+
+
+/**
+ * Test if a triangle should be culled. Used for feedback and selection mode.
+ * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise.
+ */
+GLboolean
+_swrast_culltriangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+ GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+ GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat c = ex*fy-ey*fx;
+
+ if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+
+/*
+ * Render a flat-shaded RGBA triangle.
+ */
+#define NAME flat_rgba_triangle
+#define INTERP_Z 1
+#define SETUP_CODE \
+ ASSERT(ctx->Texture._EnabledCoordUnits == 0);\
+ ASSERT(ctx->Light.ShadeModel==GL_FLAT); \
+ span.interpMask |= SPAN_RGBA; \
+ span.red = ChanToFixed(v2->color[0]); \
+ span.green = ChanToFixed(v2->color[1]); \
+ span.blue = ChanToFixed(v2->color[2]); \
+ span.alpha = ChanToFixed(v2->color[3]); \
+ span.redStep = 0; \
+ span.greenStep = 0; \
+ span.blueStep = 0; \
+ span.alphaStep = 0;
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render a smooth-shaded RGBA triangle.
+ */
+#define NAME smooth_rgba_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define SETUP_CODE \
+ { \
+ /* texturing must be off */ \
+ ASSERT(ctx->Texture._EnabledCoordUnits == 0); \
+ ASSERT(ctx->Light.ShadeModel==GL_SMOOTH); \
+ }
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T only w/out mipmapping or perspective correction.
+ *
+ * No fog. No depth testing.
+ */
+#define NAME simple_textured_triangle
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ const GLint twidth_log2 = texImg->WidthLog2; \
+ const GLubyte *texture = (const GLubyte *) texImg->Data; \
+ const GLint smask = texImg->Width - 1; \
+ const GLint tmask = texImg->Height - 1; \
+ ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
+ if (!rb || !texture) { \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ GLubyte rgb[MAX_WIDTH][3]; \
+ span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
+ span.intTex[1] -= FIXED_HALF; \
+ for (i = 0; i < span.end; i++) { \
+ GLint s = FixedToInt(span.intTex[0]) & smask; \
+ GLint t = FixedToInt(span.intTex[1]) & tmask; \
+ GLint pos = (t << twidth_log2) + s; \
+ pos = pos + pos + pos; /* multiply by 3 */ \
+ rgb[i][RCOMP] = texture[pos+2]; \
+ rgb[i][GCOMP] = texture[pos+1]; \
+ rgb[i][BCOMP] = texture[pos+0]; \
+ span.intTex[0] += span.intTexStep[0]; \
+ span.intTex[1] += span.intTexStep[1]; \
+ } \
+ rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL);
+
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T, GL_LESS depth test, w/out mipmapping or
+ * perspective correction.
+ * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)
+ *
+ * No fog.
+ */
+#define NAME simple_z_textured_triangle
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ const GLint twidth_log2 = texImg->WidthLog2; \
+ const GLubyte *texture = (const GLubyte *) texImg->Data; \
+ const GLint smask = texImg->Width - 1; \
+ const GLint tmask = texImg->Height - 1; \
+ ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
+ if (!rb || !texture) { \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ GLubyte rgb[MAX_WIDTH][3]; \
+ span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
+ span.intTex[1] -= FIXED_HALF; \
+ for (i = 0; i < span.end; i++) { \
+ const GLuint z = FixedToDepth(span.z); \
+ if (z < zRow[i]) { \
+ GLint s = FixedToInt(span.intTex[0]) & smask; \
+ GLint t = FixedToInt(span.intTex[1]) & tmask; \
+ GLint pos = (t << twidth_log2) + s; \
+ pos = pos + pos + pos; /* multiply by 3 */ \
+ rgb[i][RCOMP] = texture[pos+2]; \
+ rgb[i][GCOMP] = texture[pos+1]; \
+ rgb[i][BCOMP] = texture[pos+0]; \
+ zRow[i] = z; \
+ span.array->mask[i] = 1; \
+ } \
+ else { \
+ span.array->mask[i] = 0; \
+ } \
+ span.intTex[0] += span.intTexStep[0]; \
+ span.intTex[1] += span.intTexStep[1]; \
+ span.z += span.zStep; \
+ } \
+ rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask);
+
+#include "s_tritemp.h"
+
+
+#if CHAN_TYPE != GL_FLOAT
+
+struct affine_info
+{
+ GLenum filter;
+ GLenum format;
+ GLenum envmode;
+ GLint smask, tmask;
+ GLint twidth_log2;
+ const GLchan *texture;
+ GLfixed er, eg, eb, ea;
+ GLint tbytesline, tsize;
+};
+
+
+static INLINE GLint
+ilerp(GLint t, GLint a, GLint b)
+{
+ return a + ((t * (b - a)) >> FIXED_SHIFT);
+}
+
+static INLINE GLint
+ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11)
+{
+ const GLint temp0 = ilerp(ia, v00, v10);
+ const GLint temp1 = ilerp(ia, v01, v11);
+ return ilerp(ib, temp0, temp1);
+}
+
+
+/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA
+ * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD
+ * texture env modes.
+ */
+static INLINE void
+affine_span(struct gl_context *ctx, SWspan *span,
+ struct affine_info *info)
+{
+ GLchan sample[4]; /* the filtered texture sample */
+ const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+
+ /* Instead of defining a function for each mode, a test is done
+ * between the outer and inner loops. This is to reduce code size
+ * and complexity. Observe that an optimizing compiler kills
+ * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+ */
+
+#define NEAREST_RGB \
+ sample[RCOMP] = tex00[2]; \
+ sample[GCOMP] = tex00[1]; \
+ sample[BCOMP] = tex00[0]; \
+ sample[ACOMP] = CHAN_MAX;
+
+#define LINEAR_RGB \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
+ sample[ACOMP] = CHAN_MAX;
+
+#define NEAREST_RGBA \
+ sample[RCOMP] = tex00[3]; \
+ sample[GCOMP] = tex00[2]; \
+ sample[BCOMP] = tex00[1]; \
+ sample[ACOMP] = tex00[0];
+
+#define LINEAR_RGBA \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0])
+
+#define MODULATE \
+ dest[RCOMP] = span->red * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = span->blue * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8)
+
+#define DECAL \
+ dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red + \
+ ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green + \
+ ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue + \
+ ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = FixedToInt(span->alpha)
+
+#define BLEND \
+ dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red \
+ + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green \
+ + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue \
+ + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8)
+
+#define REPLACE COPY_CHAN4(dest, sample)
+
+#define ADD \
+ { \
+ GLint rSum = FixedToInt(span->red) + (GLint) sample[RCOMP]; \
+ GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP]; \
+ GLint bSum = FixedToInt(span->blue) + (GLint) sample[BCOMP]; \
+ dest[RCOMP] = MIN2(rSum, CHAN_MAX); \
+ dest[GCOMP] = MIN2(gSum, CHAN_MAX); \
+ dest[BCOMP] = MIN2(bSum, CHAN_MAX); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \
+ }
+
+/* shortcuts */
+
+#define NEAREST_RGB_REPLACE \
+ NEAREST_RGB; \
+ dest[0] = sample[0]; \
+ dest[1] = sample[1]; \
+ dest[2] = sample[2]; \
+ dest[3] = FixedToInt(span->alpha);
+
+#define NEAREST_RGBA_REPLACE \
+ dest[RCOMP] = tex00[3]; \
+ dest[GCOMP] = tex00[2]; \
+ dest[BCOMP] = tex00[1]; \
+ dest[ACOMP] = tex00[0]
+
+#define SPAN_NEAREST(DO_TEX, COMPS) \
+ for (i = 0; i < span->end; i++) { \
+ /* Isn't it necessary to use FixedFloor below?? */ \
+ GLint s = FixedToInt(span->intTex[0]) & info->smask; \
+ GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
+ GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMPS * pos; \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ span->intTex[0] += span->intTexStep[0]; \
+ span->intTex[1] += span->intTexStep[1]; \
+ dest += 4; \
+ }
+
+#define SPAN_LINEAR(DO_TEX, COMPS) \
+ for (i = 0; i < span->end; i++) { \
+ /* Isn't it necessary to use FixedFloor below?? */ \
+ const GLint s = FixedToInt(span->intTex[0]) & info->smask; \
+ const GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
+ const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK; \
+ const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK; \
+ const GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMPS * pos; \
+ const GLchan *tex10 = tex00 + info->tbytesline; \
+ const GLchan *tex01 = tex00 + COMPS; \
+ const GLchan *tex11 = tex10 + COMPS; \
+ if (t == info->tmask) { \
+ tex10 -= info->tsize; \
+ tex11 -= info->tsize; \
+ } \
+ if (s == info->smask) { \
+ tex01 -= info->tbytesline; \
+ tex11 -= info->tbytesline; \
+ } \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ span->intTex[0] += span->intTexStep[0]; \
+ span->intTex[1] += span->intTexStep[1]; \
+ dest += 4; \
+ }
+
+
+ GLuint i;
+ GLchan *dest = span->array->rgba[0];
+
+ /* Disable tex units so they're not re-applied in swrast_write_rgba_span */
+ ctx->Texture._EnabledCoordUnits = 0x0;
+
+ span->intTex[0] -= FIXED_HALF;
+ span->intTex[1] -= FIXED_HALF;
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch(info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+
+ case GL_LINEAR:
+ span->intTex[0] -= FIXED_HALF;
+ span->intTex[1] -= FIXED_HALF;
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+ }
+ span->interpMask &= ~SPAN_RGBA;
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ _swrast_write_rgba_span(ctx, span);
+
+ /* re-enable texture units */
+ ctx->Texture._EnabledCoordUnits = texEnableSave;
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+}
+
+
+
+/*
+ * Render an RGB/RGBA textured triangle without perspective correction.
+ */
+#define NAME affine_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct affine_info info; \
+ struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ info.texture = (const GLchan *) texImg->Data; \
+ info.twidth_log2 = texImg->WidthLog2; \
+ info.smask = texImg->Width - 1; \
+ info.tmask = texImg->Height - 1; \
+ info.format = texImg->TexFormat; \
+ info.filter = obj->MinFilter; \
+ info.envmode = unit->EnvMode; \
+ info.er = 0; \
+ info.eg = 0; \
+ info.eb = 0; \
+ span.arrayMask |= SPAN_RGBA; \
+ \
+ if (info.envmode == GL_BLEND) { \
+ /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
+ info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
+ info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
+ info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
+ info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
+ } \
+ if (!info.texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ } \
+ \
+ switch (info.format) { \
+ case MESA_FORMAT_RGB888: \
+ info.tbytesline = texImg->Width * 3; \
+ break; \
+ case MESA_FORMAT_RGBA8888: \
+ info.tbytesline = texImg->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\
+ return; \
+ } \
+ info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span ) affine_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+
+
+struct persp_info
+{
+ GLenum filter;
+ GLenum format;
+ GLenum envmode;
+ GLint smask, tmask;
+ GLint twidth_log2;
+ const GLchan *texture;
+ GLfixed er, eg, eb, ea; /* texture env color */
+ GLint tbytesline, tsize;
+};
+
+
+static INLINE void
+fast_persp_span(struct gl_context *ctx, SWspan *span,
+ struct persp_info *info)
+{
+ GLchan sample[4]; /* the filtered texture sample */
+
+ /* Instead of defining a function for each mode, a test is done
+ * between the outer and inner loops. This is to reduce code size
+ * and complexity. Observe that an optimizing compiler kills
+ * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+ */
+#define SPAN_NEAREST(DO_TEX,COMP) \
+ for (i = 0; i < span->end; i++) { \
+ GLdouble invQ = tex_coord[2] ? \
+ (1.0 / tex_coord[2]) : 1.0; \
+ GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
+ GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
+ GLint s = IFLOOR(s_tmp) & info->smask; \
+ GLint t = IFLOOR(t_tmp) & info->tmask; \
+ GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMP * pos; \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ tex_coord[0] += tex_step[0]; \
+ tex_coord[1] += tex_step[1]; \
+ tex_coord[2] += tex_step[2]; \
+ dest += 4; \
+ }
+
+#define SPAN_LINEAR(DO_TEX,COMP) \
+ for (i = 0; i < span->end; i++) { \
+ GLdouble invQ = tex_coord[2] ? \
+ (1.0 / tex_coord[2]) : 1.0; \
+ const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
+ const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
+ const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF; \
+ const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF; \
+ const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask; \
+ const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask; \
+ const GLfixed sf = s_fix & FIXED_FRAC_MASK; \
+ const GLfixed tf = t_fix & FIXED_FRAC_MASK; \
+ const GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMP * pos; \
+ const GLchan *tex10 = tex00 + info->tbytesline; \
+ const GLchan *tex01 = tex00 + COMP; \
+ const GLchan *tex11 = tex10 + COMP; \
+ if (t == info->tmask) { \
+ tex10 -= info->tsize; \
+ tex11 -= info->tsize; \
+ } \
+ if (s == info->smask) { \
+ tex01 -= info->tbytesline; \
+ tex11 -= info->tbytesline; \
+ } \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ tex_coord[0] += tex_step[0]; \
+ tex_coord[1] += tex_step[1]; \
+ tex_coord[2] += tex_step[2]; \
+ dest += 4; \
+ }
+
+ GLuint i;
+ GLfloat tex_coord[3], tex_step[3];
+ GLchan *dest = span->array->rgba[0];
+
+ const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+ ctx->Texture._EnabledCoordUnits = 0;
+
+ tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
+ tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
+ tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+ tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+ /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */
+ tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3];
+ tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3];
+
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch(info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+
+ case GL_LINEAR:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+ }
+
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ _swrast_write_rgba_span(ctx, span);
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+
+ /* restore state */
+ ctx->Texture._EnabledCoordUnits = texEnableSave;
+}
+
+
+/*
+ * Render an perspective corrected RGB/RGBA textured triangle.
+ * The Q (aka V in Mesa) coordinate must be zero such that the divide
+ * by interpolated Q/W comes out right.
+ *
+ */
+#define NAME persp_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+
+#define SETUP_CODE \
+ struct persp_info info; \
+ const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ info.texture = (const GLchan *) texImg->Data; \
+ info.twidth_log2 = texImg->WidthLog2; \
+ info.smask = texImg->Width - 1; \
+ info.tmask = texImg->Height - 1; \
+ info.format = texImg->TexFormat; \
+ info.filter = obj->MinFilter; \
+ info.envmode = unit->EnvMode; \
+ info.er = 0; \
+ info.eg = 0; \
+ info.eb = 0; \
+ \
+ if (info.envmode == GL_BLEND) { \
+ /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
+ info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
+ info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
+ info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
+ info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
+ } \
+ if (!info.texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ } \
+ \
+ switch (info.format) { \
+ case MESA_FORMAT_RGB888: \
+ info.tbytesline = texImg->Width * 3; \
+ break; \
+ case MESA_FORMAT_RGBA8888: \
+ info.tbytesline = texImg->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\
+ return; \
+ } \
+ info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span ) \
+ span.interpMask &= ~SPAN_RGBA; \
+ span.arrayMask |= SPAN_RGBA; \
+ fast_persp_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+#endif /*CHAN_TYPE != GL_FLOAT*/
+
+
+
+/*
+ * Render an RGBA triangle with arbitrary attributes.
+ */
+#define NAME general_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+
+/*
+ * Special tri function for occlusion testing
+ */
+#define NAME occlusion_zless_triangle
+#define INTERP_Z 1
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer; \
+ struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; \
+ ASSERT(ctx->Depth.Test); \
+ ASSERT(!ctx->Depth.Mask); \
+ ASSERT(ctx->Depth.Func == GL_LESS); \
+ if (!q) { \
+ return; \
+ }
+#define RENDER_SPAN( span ) \
+ if (rb->Format == MESA_FORMAT_Z16) { \
+ GLuint i; \
+ const GLushort *zRow = (const GLushort *) \
+ rb->GetPointer(ctx, rb, span.x, span.y); \
+ for (i = 0; i < span.end; i++) { \
+ GLuint z = FixedToDepth(span.z); \
+ if (z < zRow[i]) { \
+ q->Result++; \
+ } \
+ span.z += span.zStep; \
+ } \
+ } \
+ else { \
+ GLuint i; \
+ const GLuint *zRow = (const GLuint *) \
+ rb->GetPointer(ctx, rb, span.x, span.y); \
+ for (i = 0; i < span.end; i++) { \
+ if ((GLuint)span.z < zRow[i]) { \
+ q->Result++; \
+ } \
+ span.z += span.zStep; \
+ } \
+ }
+#include "s_tritemp.h"
+
+
+
+static void
+nodraw_triangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ (void) (ctx && v0 && v1 && v2);
+}
+
+
+/*
+ * This is used when separate specular color is enabled, but not
+ * texturing. We add the specular color to the primary color,
+ * draw the triangle, then restore the original primary color.
+ * Inefficient, but seldom needed.
+ */
+void
+_swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2)
+{
+ SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */
+ SWvertex *ncv1 = (SWvertex *)v1;
+ SWvertex *ncv2 = (SWvertex *)v2;
+ GLfloat rSum, gSum, bSum;
+ GLchan cSave[3][4];
+
+ /* save original colors */
+ COPY_CHAN4( cSave[0], ncv0->color );
+ COPY_CHAN4( cSave[1], ncv1->color );
+ COPY_CHAN4( cSave[2], ncv2->color );
+ /* sum v0 */
+ rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
+ /* sum v1 */
+ rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
+ /* sum v2 */
+ rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum);
+ /* draw */
+ SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );
+ /* restore original colors */
+ COPY_CHAN4( ncv0->color, cSave[0] );
+ COPY_CHAN4( ncv1->color, cSave[1] );
+ COPY_CHAN4( ncv2->color, cSave[2] );
+}
+
+
+
+#ifdef DEBUG
+
+/* record the current triangle function name */
+const char *_mesa_triFuncName = NULL;
+
+#define USE(triFunc) \
+do { \
+ _mesa_triFuncName = #triFunc; \
+ /*printf("%s\n", _mesa_triFuncName);*/ \
+ swrast->Triangle = triFunc; \
+} while (0)
+
+#else
+
+#define USE(triFunc) swrast->Triangle = triFunc;
+
+#endif
+
+
+
+
+/*
+ * Determine which triangle rendering function to use given the current
+ * rendering context.
+ *
+ * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or
+ * remove tests to this code.
+ */
+void
+_swrast_choose_triangle( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (ctx->Polygon.CullFlag &&
+ ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) {
+ USE(nodraw_triangle);
+ return;
+ }
+
+ if (ctx->RenderMode==GL_RENDER) {
+
+ if (ctx->Polygon.SmoothFlag) {
+ _swrast_set_aa_triangle_function(ctx);
+ ASSERT(swrast->Triangle);
+ return;
+ }
+
+ /* special case for occlusion testing */
+ if (ctx->Query.CurrentOcclusionObject &&
+ ctx->Depth.Test &&
+ ctx->Depth.Mask == GL_FALSE &&
+ ctx->Depth.Func == GL_LESS &&
+ !ctx->Stencil._Enabled) {
+ if (ctx->Color.ColorMask[0][0] == 0 &&
+ ctx->Color.ColorMask[0][1] == 0 &&
+ ctx->Color.ColorMask[0][2] == 0 &&
+ ctx->Color.ColorMask[0][3] == 0) {
+ USE(occlusion_zless_triangle);
+ return;
+ }
+ }
+
+ /*
+ * XXX should examine swrast->_ActiveAttribMask to determine what
+ * needs to be interpolated.
+ */
+ if (ctx->Texture._EnabledCoordUnits ||
+ ctx->FragmentProgram._Current ||
+ ctx->ATIFragmentShader._Enabled ||
+ NEED_SECONDARY_COLOR(ctx) ||
+ swrast->_FogEnabled) {
+ /* Ugh, we do a _lot_ of tests to pick the best textured tri func */
+ const struct gl_texture_object *texObj2D;
+ const struct gl_texture_image *texImg;
+ GLenum minFilter, magFilter, envMode;
+ gl_format format;
+ texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
+
+ texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;
+ format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE;
+ minFilter = texObj2D ? texObj2D->MinFilter : GL_NONE;
+ magFilter = texObj2D ? texObj2D->MagFilter : GL_NONE;
+ envMode = ctx->Texture.Unit[0].EnvMode;
+
+ /* First see if we can use an optimized 2-D texture function */
+ if (ctx->Texture._EnabledCoordUnits == 0x1
+ && !ctx->FragmentProgram._Current
+ && !ctx->ATIFragmentShader._Enabled
+ && ctx->Texture._EnabledUnits == 0x1
+ && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT
+ && texObj2D->WrapS == GL_REPEAT
+ && texObj2D->WrapT == GL_REPEAT
+ && texObj2D->_Swizzle == SWIZZLE_NOOP
+ && texImg->_IsPowerOfTwo
+ && texImg->Border == 0
+ && texImg->Width == texImg->RowStride
+ && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888)
+ && minFilter == magFilter
+ && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR
+ && !swrast->_FogEnabled
+ && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT
+ && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) {
+ if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {
+ if (minFilter == GL_NEAREST
+ && format == MESA_FORMAT_RGB888
+ && (envMode == GL_REPLACE || envMode == GL_DECAL)
+ && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)
+ && ctx->Depth.Func == GL_LESS
+ && ctx->Depth.Mask == GL_TRUE)
+ || swrast->_RasterMask == TEXTURE_BIT)
+ && ctx->Polygon.StippleFlag == GL_FALSE
+ && ctx->DrawBuffer->Visual.depthBits <= 16) {
+ if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
+ USE(simple_z_textured_triangle);
+ }
+ else {
+ USE(simple_textured_triangle);
+ }
+ }
+ else {
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) {
+ /* We only handle RGBA8888 correctly on little endian
+ * in the optimized code above.
+ */
+ USE(general_triangle);
+ }
+ else {
+ USE(affine_textured_triangle);
+ }
+#endif
+ }
+ }
+ else {
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(persp_textured_triangle);
+#endif
+ }
+ }
+ else {
+ /* general case textured triangles */
+ USE(general_triangle);
+ }
+ }
+ else {
+ ASSERT(!swrast->_FogEnabled);
+ ASSERT(!NEED_SECONDARY_COLOR(ctx));
+ if (ctx->Light.ShadeModel==GL_SMOOTH) {
+ /* smooth shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(smooth_rgba_triangle);
+#endif
+ }
+ else {
+ /* flat shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(flat_rgba_triangle);
+#endif
+ }
+ }
+ }
+ else if (ctx->RenderMode==GL_FEEDBACK) {
+ USE(_swrast_feedback_triangle);
+ }
+ else {
+ /* GL_SELECT mode */
+ USE(_swrast_select_triangle);
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_triangle.h b/mesalib/src/mesa/swrast/s_triangle.h index b81932c73..bde5dd58b 100644 --- a/mesalib/src/mesa/swrast/s_triangle.h +++ b/mesalib/src/mesa/swrast/s_triangle.h @@ -1,50 +1,50 @@ - -/* - * Mesa 3-D graphics library - * Version: 5.1 - * - * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_TRIANGLES_H -#define S_TRIANGLES_H - - -#include "swrast.h" - - -extern GLboolean -_swrast_culltriangle( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2); - -extern void -_swrast_choose_triangle( GLcontext *ctx ); - -extern void -_swrast_add_spec_terms_triangle( GLcontext *ctx, - const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2 ); - - -#endif +
+/*
+ * Mesa 3-D graphics library
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_TRIANGLES_H
+#define S_TRIANGLES_H
+
+
+#include "swrast.h"
+
+
+extern GLboolean
+_swrast_culltriangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2);
+
+extern void
+_swrast_choose_triangle( struct gl_context *ctx );
+
+extern void
+_swrast_add_spec_terms_triangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 );
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_tritemp.h b/mesalib/src/mesa/swrast/s_tritemp.h index 0aa8739f4..340c410ca 100644 --- a/mesalib/src/mesa/swrast/s_tritemp.h +++ b/mesalib/src/mesa/swrast/s_tritemp.h @@ -1,929 +1,929 @@ -/* - * Mesa 3-D graphics library - * Version: 7.0 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/* - * Triangle Rasterizer Template - * - * This file is #include'd to generate custom triangle rasterizers. - * - * The following macros may be defined to indicate what auxillary information - * must be interpolated across the triangle: - * INTERP_Z - if defined, interpolate integer Z values - * INTERP_RGB - if defined, interpolate integer RGB values - * INTERP_ALPHA - if defined, interpolate integer Alpha values - * INTERP_INT_TEX - if defined, interpolate integer ST texcoords - * (fast, simple 2-D texture mapping, without - * perspective correction) - * INTERP_ATTRIBS - if defined, interpolate arbitrary attribs (texcoords, - * varying vars, etc) This also causes W to be - * computed for perspective correction). - * - * When one can directly address pixels in the color buffer the following - * macros can be defined and used to compute pixel addresses during - * rasterization (see pRow): - * PIXEL_TYPE - the datatype of a pixel (GLubyte, GLushort, GLuint) - * BYTES_PER_ROW - number of bytes per row in the color buffer - * PIXEL_ADDRESS(X,Y) - returns the address of pixel at (X,Y) where - * Y==0 at bottom of screen and increases upward. - * - * Similarly, for direct depth buffer access, this type is used for depth - * buffer addressing (see zRow): - * DEPTH_TYPE - either GLushort or GLuint - * - * Optionally, one may provide one-time setup code per triangle: - * SETUP_CODE - code which is to be executed once per triangle - * - * The following macro MUST be defined: - * RENDER_SPAN(span) - code to write a span of pixels. - * - * This code was designed for the origin to be in the lower-left corner. - * - * Inspired by triangle rasterizer code written by Allen Akin. Thanks Allen! - * - * - * Some notes on rasterization accuracy: - * - * This code uses fixed point arithmetic (the GLfixed type) to iterate - * over the triangle edges and interpolate ancillary data (such as Z, - * color, secondary color, etc). The number of fractional bits in - * GLfixed and the value of SUB_PIXEL_BITS has a direct bearing on the - * accuracy of rasterization. - * - * If SUB_PIXEL_BITS=4 then we'll snap the vertices to the nearest - * 1/16 of a pixel. If we're walking up a long, nearly vertical edge - * (dx=1/16, dy=1024) we'll need 4 + 10 = 14 fractional bits in - * GLfixed to walk the edge without error. If the maximum viewport - * height is 4K pixels, then we'll need 4 + 12 = 16 fractional bits. - * - * Historically, Mesa has used 11 fractional bits in GLfixed, snaps - * vertices to 1/16 pixel and allowed a maximum viewport height of 2K - * pixels. 11 fractional bits is actually insufficient for accurately - * rasterizing some triangles. More recently, the maximum viewport - * height was increased to 4K pixels. Thus, Mesa should be using 16 - * fractional bits in GLfixed. Unfortunately, there may be some issues - * with setting FIXED_FRAC_BITS=16, such as multiplication overflow. - * This will have to be examined in some detail... - * - * For now, if you find rasterization errors, particularly with tall, - * sliver triangles, try increasing FIXED_FRAC_BITS and/or decreasing - * SUB_PIXEL_BITS. - */ - - -/* - * Some code we unfortunately need to prevent negative interpolated colors. - */ -#ifndef CLAMP_INTERPOLANT -#define CLAMP_INTERPOLANT(CHANNEL, CHANNELSTEP, LEN) \ -do { \ - GLfixed endVal = span.CHANNEL + (LEN) * span.CHANNELSTEP; \ - if (endVal < 0) { \ - span.CHANNEL -= endVal; \ - } \ - if (span.CHANNEL < 0) { \ - span.CHANNEL = 0; \ - } \ -} while (0) -#endif - - -static void NAME(GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, - const SWvertex *v2 ) -{ - typedef struct { - const SWvertex *v0, *v1; /* Y(v0) < Y(v1) */ - GLfloat dx; /* X(v1) - X(v0) */ - GLfloat dy; /* Y(v1) - Y(v0) */ - GLfloat dxdy; /* dx/dy */ - GLfixed fdxdy; /* dx/dy in fixed-point */ - GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */ - GLfixed fsx; /* first sample point x coord */ - GLfixed fsy; - GLfixed fx0; /* fixed pt X of lower endpoint */ - GLint lines; /* number of lines to be sampled on this edge */ - } EdgeT; - - const SWcontext *swrast = SWRAST_CONTEXT(ctx); -#ifdef INTERP_Z - const GLint depthBits = ctx->DrawBuffer->Visual.depthBits; - const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0; - const GLfloat maxDepth = ctx->DrawBuffer->_DepthMaxF; -#define FixedToDepth(F) ((F) >> fixedToDepthShift) -#endif - EdgeT eMaj, eTop, eBot; - GLfloat oneOverArea; - const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */ - GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign; - const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); /* for x/y coord snapping */ - GLfixed vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy; - - SWspan span; - - (void) swrast; - - INIT_SPAN(span, GL_POLYGON); - span.y = 0; /* silence warnings */ - -#ifdef INTERP_Z - (void) fixedToDepthShift; -#endif - - /* - printf("%s()\n", __FUNCTION__); - printf(" %g, %g, %g\n", - v0->attrib[FRAG_ATTRIB_WPOS][0], - v0->attrib[FRAG_ATTRIB_WPOS][1], - v0->attrib[FRAG_ATTRIB_WPOS][2]); - printf(" %g, %g, %g\n", - v1->attrib[FRAG_ATTRIB_WPOS][0], - v1->attrib[FRAG_ATTRIB_WPOS][1], - v1->attrib[FRAG_ATTRIB_WPOS][2]); - printf(" %g, %g, %g\n", - v2->attrib[FRAG_ATTRIB_WPOS][0], - v2->attrib[FRAG_ATTRIB_WPOS][1], - v2->attrib[FRAG_ATTRIB_WPOS][2]); - */ - - /* Compute fixed point x,y coords w/ half-pixel offsets and snapping. - * And find the order of the 3 vertices along the Y axis. - */ - { - const GLfixed fy0 = FloatToFixed(v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask; - const GLfixed fy1 = FloatToFixed(v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask; - const GLfixed fy2 = FloatToFixed(v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask; - if (fy0 <= fy1) { - if (fy1 <= fy2) { - /* y0 <= y1 <= y2 */ - vMin = v0; vMid = v1; vMax = v2; - vMin_fy = fy0; vMid_fy = fy1; vMax_fy = fy2; - } - else if (fy2 <= fy0) { - /* y2 <= y0 <= y1 */ - vMin = v2; vMid = v0; vMax = v1; - vMin_fy = fy2; vMid_fy = fy0; vMax_fy = fy1; - } - else { - /* y0 <= y2 <= y1 */ - vMin = v0; vMid = v2; vMax = v1; - vMin_fy = fy0; vMid_fy = fy2; vMax_fy = fy1; - bf = -bf; - } - } - else { - if (fy0 <= fy2) { - /* y1 <= y0 <= y2 */ - vMin = v1; vMid = v0; vMax = v2; - vMin_fy = fy1; vMid_fy = fy0; vMax_fy = fy2; - bf = -bf; - } - else if (fy2 <= fy1) { - /* y2 <= y1 <= y0 */ - vMin = v2; vMid = v1; vMax = v0; - vMin_fy = fy2; vMid_fy = fy1; vMax_fy = fy0; - bf = -bf; - } - else { - /* y1 <= y2 <= y0 */ - vMin = v1; vMid = v2; vMax = v0; - vMin_fy = fy1; vMid_fy = fy2; vMax_fy = fy0; - } - } - - /* fixed point X coords */ - vMin_fx = FloatToFixed(vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask; - vMid_fx = FloatToFixed(vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask; - vMax_fx = FloatToFixed(vMax->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask; - } - - /* vertex/edge relationship */ - eMaj.v0 = vMin; eMaj.v1 = vMax; /*TODO: .v1's not needed */ - eTop.v0 = vMid; eTop.v1 = vMax; - eBot.v0 = vMin; eBot.v1 = vMid; - - /* compute deltas for each edge: vertex[upper] - vertex[lower] */ - eMaj.dx = FixedToFloat(vMax_fx - vMin_fx); - eMaj.dy = FixedToFloat(vMax_fy - vMin_fy); - eTop.dx = FixedToFloat(vMax_fx - vMid_fx); - eTop.dy = FixedToFloat(vMax_fy - vMid_fy); - eBot.dx = FixedToFloat(vMid_fx - vMin_fx); - eBot.dy = FixedToFloat(vMid_fy - vMin_fy); - - /* compute area, oneOverArea and perform backface culling */ - { - const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy; - - if (IS_INF_OR_NAN(area) || area == 0.0F) - return; - - if (area * bf * swrast->_BackfaceCullSign < 0.0) - return; - - oneOverArea = 1.0F / area; - - /* 0 = front, 1 = back */ - span.facing = oneOverArea * bf > 0.0F; - } - - /* Edge setup. For a triangle strip these could be reused... */ - { - eMaj.fsy = FixedCeil(vMin_fy); - eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy)); - if (eMaj.lines > 0) { - eMaj.dxdy = eMaj.dx / eMaj.dy; - eMaj.fdxdy = SignedFloatToFixed(eMaj.dxdy); - eMaj.adjy = (GLfloat) (eMaj.fsy - vMin_fy); /* SCALED! */ - eMaj.fx0 = vMin_fx; - eMaj.fsx = eMaj.fx0 + (GLfixed) (eMaj.adjy * eMaj.dxdy); - } - else { - return; /*CULLED*/ - } - - eTop.fsy = FixedCeil(vMid_fy); - eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy)); - if (eTop.lines > 0) { - eTop.dxdy = eTop.dx / eTop.dy; - eTop.fdxdy = SignedFloatToFixed(eTop.dxdy); - eTop.adjy = (GLfloat) (eTop.fsy - vMid_fy); /* SCALED! */ - eTop.fx0 = vMid_fx; - eTop.fsx = eTop.fx0 + (GLfixed) (eTop.adjy * eTop.dxdy); - } - - eBot.fsy = FixedCeil(vMin_fy); - eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy)); - if (eBot.lines > 0) { - eBot.dxdy = eBot.dx / eBot.dy; - eBot.fdxdy = SignedFloatToFixed(eBot.dxdy); - eBot.adjy = (GLfloat) (eBot.fsy - vMin_fy); /* SCALED! */ - eBot.fx0 = vMin_fx; - eBot.fsx = eBot.fx0 + (GLfixed) (eBot.adjy * eBot.dxdy); - } - } - - /* - * Conceptually, we view a triangle as two subtriangles - * separated by a perfectly horizontal line. The edge that is - * intersected by this line is one with maximal absolute dy; we - * call it a ``major'' edge. The other two edges are the - * ``top'' edge (for the upper subtriangle) and the ``bottom'' - * edge (for the lower subtriangle). If either of these two - * edges is horizontal or very close to horizontal, the - * corresponding subtriangle might cover zero sample points; - * we take care to handle such cases, for performance as well - * as correctness. - * - * By stepping rasterization parameters along the major edge, - * we can avoid recomputing them at the discontinuity where - * the top and bottom edges meet. However, this forces us to - * be able to scan both left-to-right and right-to-left. - * Also, we must determine whether the major edge is at the - * left or right side of the triangle. We do this by - * computing the magnitude of the cross-product of the major - * and top edges. Since this magnitude depends on the sine of - * the angle between the two edges, its sign tells us whether - * we turn to the left or to the right when travelling along - * the major edge to the top edge, and from this we infer - * whether the major edge is on the left or the right. - * - * Serendipitously, this cross-product magnitude is also a - * value we need to compute the iteration parameter - * derivatives for the triangle, and it can be used to perform - * backface culling because its sign tells us whether the - * triangle is clockwise or counterclockwise. In this code we - * refer to it as ``area'' because it's also proportional to - * the pixel area of the triangle. - */ - - { - GLint scan_from_left_to_right; /* true if scanning left-to-right */ - - /* - * Execute user-supplied setup code - */ -#ifdef SETUP_CODE - SETUP_CODE -#endif - - scan_from_left_to_right = (oneOverArea < 0.0F); - - - /* compute d?/dx and d?/dy derivatives */ -#ifdef INTERP_Z - span.interpMask |= SPAN_Z; - { - GLfloat eMaj_dz = vMax->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2]; - GLfloat eBot_dz = vMid->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2]; - span.attrStepX[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz); - if (span.attrStepX[FRAG_ATTRIB_WPOS][2] > maxDepth || - span.attrStepX[FRAG_ATTRIB_WPOS][2] < -maxDepth) { - /* probably a sliver triangle */ - span.attrStepX[FRAG_ATTRIB_WPOS][2] = 0.0; - span.attrStepY[FRAG_ATTRIB_WPOS][2] = 0.0; - } - else { - span.attrStepY[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx); - } - if (depthBits <= 16) - span.zStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_WPOS][2]); - else - span.zStep = (GLint) span.attrStepX[FRAG_ATTRIB_WPOS][2]; - } -#endif -#ifdef INTERP_RGB - span.interpMask |= SPAN_RGBA; - if (ctx->Light.ShadeModel == GL_SMOOTH) { - GLfloat eMaj_dr = (GLfloat) (vMax->color[RCOMP] - vMin->color[RCOMP]); - GLfloat eBot_dr = (GLfloat) (vMid->color[RCOMP] - vMin->color[RCOMP]); - GLfloat eMaj_dg = (GLfloat) (vMax->color[GCOMP] - vMin->color[GCOMP]); - GLfloat eBot_dg = (GLfloat) (vMid->color[GCOMP] - vMin->color[GCOMP]); - GLfloat eMaj_db = (GLfloat) (vMax->color[BCOMP] - vMin->color[BCOMP]); - GLfloat eBot_db = (GLfloat) (vMid->color[BCOMP] - vMin->color[BCOMP]); -# ifdef INTERP_ALPHA - GLfloat eMaj_da = (GLfloat) (vMax->color[ACOMP] - vMin->color[ACOMP]); - GLfloat eBot_da = (GLfloat) (vMid->color[ACOMP] - vMin->color[ACOMP]); -# endif - span.attrStepX[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr); - span.attrStepY[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx); - span.attrStepX[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg); - span.attrStepY[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx); - span.attrStepX[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db); - span.attrStepY[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx); - span.redStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][0]); - span.greenStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][1]); - span.blueStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][2]); -# ifdef INTERP_ALPHA - span.attrStepX[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da); - span.attrStepY[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx); - span.alphaStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][3]); -# endif /* INTERP_ALPHA */ - } - else { - ASSERT(ctx->Light.ShadeModel == GL_FLAT); - span.interpMask |= SPAN_FLAT; - span.attrStepX[FRAG_ATTRIB_COL0][0] = span.attrStepY[FRAG_ATTRIB_COL0][0] = 0.0F; - span.attrStepX[FRAG_ATTRIB_COL0][1] = span.attrStepY[FRAG_ATTRIB_COL0][1] = 0.0F; - span.attrStepX[FRAG_ATTRIB_COL0][2] = span.attrStepY[FRAG_ATTRIB_COL0][2] = 0.0F; - span.redStep = 0; - span.greenStep = 0; - span.blueStep = 0; -# ifdef INTERP_ALPHA - span.attrStepX[FRAG_ATTRIB_COL0][3] = span.attrStepY[FRAG_ATTRIB_COL0][3] = 0.0F; - span.alphaStep = 0; -# endif - } -#endif /* INTERP_RGB */ -#ifdef INTERP_INT_TEX - { - GLfloat eMaj_ds = (vMax->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE; - GLfloat eBot_ds = (vMid->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE; - GLfloat eMaj_dt = (vMax->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE; - GLfloat eBot_dt = (vMid->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE; - span.attrStepX[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds); - span.attrStepY[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx); - span.attrStepX[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt); - span.attrStepY[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx); - span.intTexStep[0] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][0]); - span.intTexStep[1] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][1]); - } -#endif -#ifdef INTERP_ATTRIBS - { - /* attrib[FRAG_ATTRIB_WPOS][3] is 1/W */ - const GLfloat wMax = vMax->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat wMin = vMin->attrib[FRAG_ATTRIB_WPOS][3]; - const GLfloat wMid = vMid->attrib[FRAG_ATTRIB_WPOS][3]; - { - const GLfloat eMaj_dw = wMax - wMin; - const GLfloat eBot_dw = wMid - wMin; - span.attrStepX[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw); - span.attrStepY[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx); - } - ATTRIB_LOOP_BEGIN - if (swrast->_InterpMode[attr] == GL_FLAT) { - ASSIGN_4V(span.attrStepX[attr], 0.0, 0.0, 0.0, 0.0); - ASSIGN_4V(span.attrStepY[attr], 0.0, 0.0, 0.0, 0.0); - } - else { - GLuint c; - for (c = 0; c < 4; c++) { - GLfloat eMaj_da = vMax->attrib[attr][c] * wMax - vMin->attrib[attr][c] * wMin; - GLfloat eBot_da = vMid->attrib[attr][c] * wMid - vMin->attrib[attr][c] * wMin; - span.attrStepX[attr][c] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da); - span.attrStepY[attr][c] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx); - } - } - ATTRIB_LOOP_END - } -#endif - - /* - * We always sample at pixel centers. However, we avoid - * explicit half-pixel offsets in this code by incorporating - * the proper offset in each of x and y during the - * transformation to window coordinates. - * - * We also apply the usual rasterization rules to prevent - * cracks and overlaps. A pixel is considered inside a - * subtriangle if it meets all of four conditions: it is on or - * to the right of the left edge, strictly to the left of the - * right edge, on or below the top edge, and strictly above - * the bottom edge. (Some edges may be degenerate.) - * - * The following discussion assumes left-to-right scanning - * (that is, the major edge is on the left); the right-to-left - * case is a straightforward variation. - * - * We start by finding the half-integral y coordinate that is - * at or below the top of the triangle. This gives us the - * first scan line that could possibly contain pixels that are - * inside the triangle. - * - * Next we creep down the major edge until we reach that y, - * and compute the corresponding x coordinate on the edge. - * Then we find the half-integral x that lies on or just - * inside the edge. This is the first pixel that might lie in - * the interior of the triangle. (We won't know for sure - * until we check the other edges.) - * - * As we rasterize the triangle, we'll step down the major - * edge. For each step in y, we'll move an integer number - * of steps in x. There are two possible x step sizes, which - * we'll call the ``inner'' step (guaranteed to land on the - * edge or inside it) and the ``outer'' step (guaranteed to - * land on the edge or outside it). The inner and outer steps - * differ by one. During rasterization we maintain an error - * term that indicates our distance from the true edge, and - * select either the inner step or the outer step, whichever - * gets us to the first pixel that falls inside the triangle. - * - * All parameters (z, red, etc.) as well as the buffer - * addresses for color and z have inner and outer step values, - * so that we can increment them appropriately. This method - * eliminates the need to adjust parameters by creeping a - * sub-pixel amount into the triangle at each scanline. - */ - - { - GLint subTriangle; - GLfixed fxLeftEdge = 0, fxRightEdge = 0; - GLfixed fdxLeftEdge = 0, fdxRightEdge = 0; - GLfixed fError = 0, fdError = 0; -#ifdef PIXEL_ADDRESS - PIXEL_TYPE *pRow = NULL; - GLint dPRowOuter = 0, dPRowInner; /* offset in bytes */ -#endif -#ifdef INTERP_Z -# ifdef DEPTH_TYPE - struct gl_renderbuffer *zrb - = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; - DEPTH_TYPE *zRow = NULL; - GLint dZRowOuter = 0, dZRowInner; /* offset in bytes */ -# endif - GLuint zLeft = 0; - GLfixed fdzOuter = 0, fdzInner; -#endif -#ifdef INTERP_RGB - GLint rLeft = 0, fdrOuter = 0, fdrInner; - GLint gLeft = 0, fdgOuter = 0, fdgInner; - GLint bLeft = 0, fdbOuter = 0, fdbInner; -#endif -#ifdef INTERP_ALPHA - GLint aLeft = 0, fdaOuter = 0, fdaInner; -#endif -#ifdef INTERP_INT_TEX - GLfixed sLeft=0, dsOuter=0, dsInner; - GLfixed tLeft=0, dtOuter=0, dtInner; -#endif -#ifdef INTERP_ATTRIBS - GLfloat wLeft = 0, dwOuter = 0, dwInner; - GLfloat attrLeft[FRAG_ATTRIB_MAX][4]; - GLfloat daOuter[FRAG_ATTRIB_MAX][4], daInner[FRAG_ATTRIB_MAX][4]; -#endif - - for (subTriangle=0; subTriangle<=1; subTriangle++) { - EdgeT *eLeft, *eRight; - int setupLeft, setupRight; - int lines; - - if (subTriangle==0) { - /* bottom half */ - if (scan_from_left_to_right) { - eLeft = &eMaj; - eRight = &eBot; - lines = eRight->lines; - setupLeft = 1; - setupRight = 1; - } - else { - eLeft = &eBot; - eRight = &eMaj; - lines = eLeft->lines; - setupLeft = 1; - setupRight = 1; - } - } - else { - /* top half */ - if (scan_from_left_to_right) { - eLeft = &eMaj; - eRight = &eTop; - lines = eRight->lines; - setupLeft = 0; - setupRight = 1; - } - else { - eLeft = &eTop; - eRight = &eMaj; - lines = eLeft->lines; - setupLeft = 1; - setupRight = 0; - } - if (lines == 0) - return; - } - - if (setupLeft && eLeft->lines > 0) { - const SWvertex *vLower = eLeft->v0; - const GLfixed fsy = eLeft->fsy; - const GLfixed fsx = eLeft->fsx; /* no fractional part */ - const GLfixed fx = FixedCeil(fsx); /* no fractional part */ - const GLfixed adjx = (GLfixed) (fx - eLeft->fx0); /* SCALED! */ - const GLfixed adjy = (GLfixed) eLeft->adjy; /* SCALED! */ - GLint idxOuter; - GLfloat dxOuter; - GLfixed fdxOuter; - - fError = fx - fsx - FIXED_ONE; - fxLeftEdge = fsx - FIXED_EPSILON; - fdxLeftEdge = eLeft->fdxdy; - fdxOuter = FixedFloor(fdxLeftEdge - FIXED_EPSILON); - fdError = fdxOuter - fdxLeftEdge + FIXED_ONE; - idxOuter = FixedToInt(fdxOuter); - dxOuter = (GLfloat) idxOuter; - span.y = FixedToInt(fsy); - - /* silence warnings on some compilers */ - (void) dxOuter; - (void) adjx; - (void) adjy; - (void) vLower; - -#ifdef PIXEL_ADDRESS - { - pRow = (PIXEL_TYPE *) PIXEL_ADDRESS(FixedToInt(fxLeftEdge), span.y); - dPRowOuter = -((int)BYTES_PER_ROW) + idxOuter * sizeof(PIXEL_TYPE); - /* negative because Y=0 at bottom and increases upward */ - } -#endif - /* - * Now we need the set of parameter (z, color, etc.) values at - * the point (fx, fsy). This gives us properly-sampled parameter - * values that we can step from pixel to pixel. Furthermore, - * although we might have intermediate results that overflow - * the normal parameter range when we step temporarily outside - * the triangle, we shouldn't overflow or underflow for any - * pixel that's actually inside the triangle. - */ - -#ifdef INTERP_Z - { - GLfloat z0 = vLower->attrib[FRAG_ATTRIB_WPOS][2]; - if (depthBits <= 16) { - /* interpolate fixed-pt values */ - GLfloat tmp = (z0 * FIXED_SCALE - + span.attrStepX[FRAG_ATTRIB_WPOS][2] * adjx - + span.attrStepY[FRAG_ATTRIB_WPOS][2] * adjy) + FIXED_HALF; - if (tmp < MAX_GLUINT / 2) - zLeft = (GLfixed) tmp; - else - zLeft = MAX_GLUINT / 2; - fdzOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_WPOS][2] + - dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]); - } - else { - /* interpolate depth values w/out scaling */ - zLeft = (GLuint) (z0 + span.attrStepX[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjx) - + span.attrStepY[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjy)); - fdzOuter = (GLint) (span.attrStepY[FRAG_ATTRIB_WPOS][2] + - dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]); - } -# ifdef DEPTH_TYPE - zRow = (DEPTH_TYPE *) - zrb->GetPointer(ctx, zrb, FixedToInt(fxLeftEdge), span.y); - dZRowOuter = (ctx->DrawBuffer->Width + idxOuter) * sizeof(DEPTH_TYPE); -# endif - } -#endif -#ifdef INTERP_RGB - if (ctx->Light.ShadeModel == GL_SMOOTH) { - rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP]) - + span.attrStepX[FRAG_ATTRIB_COL0][0] * adjx - + span.attrStepY[FRAG_ATTRIB_COL0][0] * adjy) + FIXED_HALF; - gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP]) - + span.attrStepX[FRAG_ATTRIB_COL0][1] * adjx - + span.attrStepY[FRAG_ATTRIB_COL0][1] * adjy) + FIXED_HALF; - bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP]) - + span.attrStepX[FRAG_ATTRIB_COL0][2] * adjx - + span.attrStepY[FRAG_ATTRIB_COL0][2] * adjy) + FIXED_HALF; - fdrOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][0] - + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][0]); - fdgOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][1] - + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][1]); - fdbOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][2] - + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][2]); -# ifdef INTERP_ALPHA - aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP]) - + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjx - + span.attrStepY[FRAG_ATTRIB_COL0][3] * adjy) + FIXED_HALF; - fdaOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][3] - + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][3]); -# endif - } - else { - ASSERT(ctx->Light.ShadeModel == GL_FLAT); - rLeft = ChanToFixed(v2->color[RCOMP]); - gLeft = ChanToFixed(v2->color[GCOMP]); - bLeft = ChanToFixed(v2->color[BCOMP]); - fdrOuter = fdgOuter = fdbOuter = 0; -# ifdef INTERP_ALPHA - aLeft = ChanToFixed(v2->color[ACOMP]); - fdaOuter = 0; -# endif - } -#endif /* INTERP_RGB */ - - -#ifdef INTERP_INT_TEX - { - GLfloat s0, t0; - s0 = vLower->attrib[FRAG_ATTRIB_TEX0][0] * S_SCALE; - sLeft = (GLfixed)(s0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][0] * adjx - + span.attrStepY[FRAG_ATTRIB_TEX0][0] * adjy) + FIXED_HALF; - dsOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][0] - + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][0]); - - t0 = vLower->attrib[FRAG_ATTRIB_TEX0][1] * T_SCALE; - tLeft = (GLfixed)(t0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][1] * adjx - + span.attrStepY[FRAG_ATTRIB_TEX0][1] * adjy) + FIXED_HALF; - dtOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][1] - + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][1]); - } -#endif -#ifdef INTERP_ATTRIBS - { - const GLuint attr = FRAG_ATTRIB_WPOS; - wLeft = vLower->attrib[FRAG_ATTRIB_WPOS][3] - + (span.attrStepX[attr][3] * adjx - + span.attrStepY[attr][3] * adjy) * (1.0F/FIXED_SCALE); - dwOuter = span.attrStepY[attr][3] + dxOuter * span.attrStepX[attr][3]; - } - ATTRIB_LOOP_BEGIN - const GLfloat invW = vLower->attrib[FRAG_ATTRIB_WPOS][3]; - if (swrast->_InterpMode[attr] == GL_FLAT) { - GLuint c; - for (c = 0; c < 4; c++) { - attrLeft[attr][c] = v2->attrib[attr][c] * invW; - daOuter[attr][c] = 0.0; - } - } - else { - GLuint c; - for (c = 0; c < 4; c++) { - const GLfloat a = vLower->attrib[attr][c] * invW; - attrLeft[attr][c] = a + ( span.attrStepX[attr][c] * adjx - + span.attrStepY[attr][c] * adjy) * (1.0F/FIXED_SCALE); - daOuter[attr][c] = span.attrStepY[attr][c] + dxOuter * span.attrStepX[attr][c]; - } - } - ATTRIB_LOOP_END -#endif - } /*if setupLeft*/ - - - if (setupRight && eRight->lines>0) { - fxRightEdge = eRight->fsx - FIXED_EPSILON; - fdxRightEdge = eRight->fdxdy; - } - - if (lines==0) { - continue; - } - - - /* Rasterize setup */ -#ifdef PIXEL_ADDRESS - dPRowInner = dPRowOuter + sizeof(PIXEL_TYPE); -#endif -#ifdef INTERP_Z -# ifdef DEPTH_TYPE - dZRowInner = dZRowOuter + sizeof(DEPTH_TYPE); -# endif - fdzInner = fdzOuter + span.zStep; -#endif -#ifdef INTERP_RGB - fdrInner = fdrOuter + span.redStep; - fdgInner = fdgOuter + span.greenStep; - fdbInner = fdbOuter + span.blueStep; -#endif -#ifdef INTERP_ALPHA - fdaInner = fdaOuter + span.alphaStep; -#endif -#ifdef INTERP_INT_TEX - dsInner = dsOuter + span.intTexStep[0]; - dtInner = dtOuter + span.intTexStep[1]; -#endif -#ifdef INTERP_ATTRIBS - dwInner = dwOuter + span.attrStepX[FRAG_ATTRIB_WPOS][3]; - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - daInner[attr][c] = daOuter[attr][c] + span.attrStepX[attr][c]; - } - ATTRIB_LOOP_END -#endif - - while (lines > 0) { - /* initialize the span interpolants to the leftmost value */ - /* ff = fixed-pt fragment */ - const GLint right = FixedToInt(fxRightEdge); - span.x = FixedToInt(fxLeftEdge); - if (right <= span.x) - span.end = 0; - else - span.end = right - span.x; - -#ifdef INTERP_Z - span.z = zLeft; -#endif -#ifdef INTERP_RGB - span.red = rLeft; - span.green = gLeft; - span.blue = bLeft; -#endif -#ifdef INTERP_ALPHA - span.alpha = aLeft; -#endif -#ifdef INTERP_INT_TEX - span.intTex[0] = sLeft; - span.intTex[1] = tLeft; -#endif - -#ifdef INTERP_ATTRIBS - span.attrStart[FRAG_ATTRIB_WPOS][3] = wLeft; - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - span.attrStart[attr][c] = attrLeft[attr][c]; - } - ATTRIB_LOOP_END -#endif - - /* This is where we actually generate fragments */ - /* XXX the test for span.y > 0 _shouldn't_ be needed but - * it fixes a problem on 64-bit Opterons (bug 4842). - */ - if (span.end > 0 && span.y >= 0) { - const GLint len = span.end - 1; - (void) len; -#ifdef INTERP_RGB - CLAMP_INTERPOLANT(red, redStep, len); - CLAMP_INTERPOLANT(green, greenStep, len); - CLAMP_INTERPOLANT(blue, blueStep, len); -#endif -#ifdef INTERP_ALPHA - CLAMP_INTERPOLANT(alpha, alphaStep, len); -#endif - { - RENDER_SPAN( span ); - } - } - - /* - * Advance to the next scan line. Compute the - * new edge coordinates, and adjust the - * pixel-center x coordinate so that it stays - * on or inside the major edge. - */ - span.y++; - lines--; - - fxLeftEdge += fdxLeftEdge; - fxRightEdge += fdxRightEdge; - - fError += fdError; - if (fError >= 0) { - fError -= FIXED_ONE; - -#ifdef PIXEL_ADDRESS - pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowOuter); -#endif -#ifdef INTERP_Z -# ifdef DEPTH_TYPE - zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowOuter); -# endif - zLeft += fdzOuter; -#endif -#ifdef INTERP_RGB - rLeft += fdrOuter; - gLeft += fdgOuter; - bLeft += fdbOuter; -#endif -#ifdef INTERP_ALPHA - aLeft += fdaOuter; -#endif -#ifdef INTERP_INT_TEX - sLeft += dsOuter; - tLeft += dtOuter; -#endif -#ifdef INTERP_ATTRIBS - wLeft += dwOuter; - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - attrLeft[attr][c] += daOuter[attr][c]; - } - ATTRIB_LOOP_END -#endif - } - else { -#ifdef PIXEL_ADDRESS - pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowInner); -#endif -#ifdef INTERP_Z -# ifdef DEPTH_TYPE - zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowInner); -# endif - zLeft += fdzInner; -#endif -#ifdef INTERP_RGB - rLeft += fdrInner; - gLeft += fdgInner; - bLeft += fdbInner; -#endif -#ifdef INTERP_ALPHA - aLeft += fdaInner; -#endif -#ifdef INTERP_INT_TEX - sLeft += dsInner; - tLeft += dtInner; -#endif -#ifdef INTERP_ATTRIBS - wLeft += dwInner; - ATTRIB_LOOP_BEGIN - GLuint c; - for (c = 0; c < 4; c++) { - attrLeft[attr][c] += daInner[attr][c]; - } - ATTRIB_LOOP_END -#endif - } - } /*while lines>0*/ - - } /* for subTriangle */ - - } - } -} - -#undef SETUP_CODE -#undef RENDER_SPAN - -#undef PIXEL_TYPE -#undef BYTES_PER_ROW -#undef PIXEL_ADDRESS -#undef DEPTH_TYPE - -#undef INTERP_Z -#undef INTERP_RGB -#undef INTERP_ALPHA -#undef INTERP_INT_TEX -#undef INTERP_ATTRIBS - -#undef S_SCALE -#undef T_SCALE - -#undef FixedToDepth - -#undef NAME +/*
+ * Mesa 3-D graphics library
+ * Version: 7.0
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * Triangle Rasterizer Template
+ *
+ * This file is #include'd to generate custom triangle rasterizers.
+ *
+ * The following macros may be defined to indicate what auxillary information
+ * must be interpolated across the triangle:
+ * INTERP_Z - if defined, interpolate integer Z values
+ * INTERP_RGB - if defined, interpolate integer RGB values
+ * INTERP_ALPHA - if defined, interpolate integer Alpha values
+ * INTERP_INT_TEX - if defined, interpolate integer ST texcoords
+ * (fast, simple 2-D texture mapping, without
+ * perspective correction)
+ * INTERP_ATTRIBS - if defined, interpolate arbitrary attribs (texcoords,
+ * varying vars, etc) This also causes W to be
+ * computed for perspective correction).
+ *
+ * When one can directly address pixels in the color buffer the following
+ * macros can be defined and used to compute pixel addresses during
+ * rasterization (see pRow):
+ * PIXEL_TYPE - the datatype of a pixel (GLubyte, GLushort, GLuint)
+ * BYTES_PER_ROW - number of bytes per row in the color buffer
+ * PIXEL_ADDRESS(X,Y) - returns the address of pixel at (X,Y) where
+ * Y==0 at bottom of screen and increases upward.
+ *
+ * Similarly, for direct depth buffer access, this type is used for depth
+ * buffer addressing (see zRow):
+ * DEPTH_TYPE - either GLushort or GLuint
+ *
+ * Optionally, one may provide one-time setup code per triangle:
+ * SETUP_CODE - code which is to be executed once per triangle
+ *
+ * The following macro MUST be defined:
+ * RENDER_SPAN(span) - code to write a span of pixels.
+ *
+ * This code was designed for the origin to be in the lower-left corner.
+ *
+ * Inspired by triangle rasterizer code written by Allen Akin. Thanks Allen!
+ *
+ *
+ * Some notes on rasterization accuracy:
+ *
+ * This code uses fixed point arithmetic (the GLfixed type) to iterate
+ * over the triangle edges and interpolate ancillary data (such as Z,
+ * color, secondary color, etc). The number of fractional bits in
+ * GLfixed and the value of SUB_PIXEL_BITS has a direct bearing on the
+ * accuracy of rasterization.
+ *
+ * If SUB_PIXEL_BITS=4 then we'll snap the vertices to the nearest
+ * 1/16 of a pixel. If we're walking up a long, nearly vertical edge
+ * (dx=1/16, dy=1024) we'll need 4 + 10 = 14 fractional bits in
+ * GLfixed to walk the edge without error. If the maximum viewport
+ * height is 4K pixels, then we'll need 4 + 12 = 16 fractional bits.
+ *
+ * Historically, Mesa has used 11 fractional bits in GLfixed, snaps
+ * vertices to 1/16 pixel and allowed a maximum viewport height of 2K
+ * pixels. 11 fractional bits is actually insufficient for accurately
+ * rasterizing some triangles. More recently, the maximum viewport
+ * height was increased to 4K pixels. Thus, Mesa should be using 16
+ * fractional bits in GLfixed. Unfortunately, there may be some issues
+ * with setting FIXED_FRAC_BITS=16, such as multiplication overflow.
+ * This will have to be examined in some detail...
+ *
+ * For now, if you find rasterization errors, particularly with tall,
+ * sliver triangles, try increasing FIXED_FRAC_BITS and/or decreasing
+ * SUB_PIXEL_BITS.
+ */
+
+
+/*
+ * Some code we unfortunately need to prevent negative interpolated colors.
+ */
+#ifndef CLAMP_INTERPOLANT
+#define CLAMP_INTERPOLANT(CHANNEL, CHANNELSTEP, LEN) \
+do { \
+ GLfixed endVal = span.CHANNEL + (LEN) * span.CHANNELSTEP; \
+ if (endVal < 0) { \
+ span.CHANNEL -= endVal; \
+ } \
+ if (span.CHANNEL < 0) { \
+ span.CHANNEL = 0; \
+ } \
+} while (0)
+#endif
+
+
+static void NAME(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ typedef struct {
+ const SWvertex *v0, *v1; /* Y(v0) < Y(v1) */
+ GLfloat dx; /* X(v1) - X(v0) */
+ GLfloat dy; /* Y(v1) - Y(v0) */
+ GLfloat dxdy; /* dx/dy */
+ GLfixed fdxdy; /* dx/dy in fixed-point */
+ GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */
+ GLfixed fsx; /* first sample point x coord */
+ GLfixed fsy;
+ GLfixed fx0; /* fixed pt X of lower endpoint */
+ GLint lines; /* number of lines to be sampled on this edge */
+ } EdgeT;
+
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+#ifdef INTERP_Z
+ const GLint depthBits = ctx->DrawBuffer->Visual.depthBits;
+ const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0;
+ const GLfloat maxDepth = ctx->DrawBuffer->_DepthMaxF;
+#define FixedToDepth(F) ((F) >> fixedToDepthShift)
+#endif
+ EdgeT eMaj, eTop, eBot;
+ GLfloat oneOverArea;
+ const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */
+ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign;
+ const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); /* for x/y coord snapping */
+ GLfixed vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy;
+
+ SWspan span;
+
+ (void) swrast;
+
+ INIT_SPAN(span, GL_POLYGON);
+ span.y = 0; /* silence warnings */
+
+#ifdef INTERP_Z
+ (void) fixedToDepthShift;
+#endif
+
+ /*
+ printf("%s()\n", __FUNCTION__);
+ printf(" %g, %g, %g\n",
+ v0->attrib[FRAG_ATTRIB_WPOS][0],
+ v0->attrib[FRAG_ATTRIB_WPOS][1],
+ v0->attrib[FRAG_ATTRIB_WPOS][2]);
+ printf(" %g, %g, %g\n",
+ v1->attrib[FRAG_ATTRIB_WPOS][0],
+ v1->attrib[FRAG_ATTRIB_WPOS][1],
+ v1->attrib[FRAG_ATTRIB_WPOS][2]);
+ printf(" %g, %g, %g\n",
+ v2->attrib[FRAG_ATTRIB_WPOS][0],
+ v2->attrib[FRAG_ATTRIB_WPOS][1],
+ v2->attrib[FRAG_ATTRIB_WPOS][2]);
+ */
+
+ /* Compute fixed point x,y coords w/ half-pixel offsets and snapping.
+ * And find the order of the 3 vertices along the Y axis.
+ */
+ {
+ const GLfixed fy0 = FloatToFixed(v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
+ const GLfixed fy1 = FloatToFixed(v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
+ const GLfixed fy2 = FloatToFixed(v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
+ if (fy0 <= fy1) {
+ if (fy1 <= fy2) {
+ /* y0 <= y1 <= y2 */
+ vMin = v0; vMid = v1; vMax = v2;
+ vMin_fy = fy0; vMid_fy = fy1; vMax_fy = fy2;
+ }
+ else if (fy2 <= fy0) {
+ /* y2 <= y0 <= y1 */
+ vMin = v2; vMid = v0; vMax = v1;
+ vMin_fy = fy2; vMid_fy = fy0; vMax_fy = fy1;
+ }
+ else {
+ /* y0 <= y2 <= y1 */
+ vMin = v0; vMid = v2; vMax = v1;
+ vMin_fy = fy0; vMid_fy = fy2; vMax_fy = fy1;
+ bf = -bf;
+ }
+ }
+ else {
+ if (fy0 <= fy2) {
+ /* y1 <= y0 <= y2 */
+ vMin = v1; vMid = v0; vMax = v2;
+ vMin_fy = fy1; vMid_fy = fy0; vMax_fy = fy2;
+ bf = -bf;
+ }
+ else if (fy2 <= fy1) {
+ /* y2 <= y1 <= y0 */
+ vMin = v2; vMid = v1; vMax = v0;
+ vMin_fy = fy2; vMid_fy = fy1; vMax_fy = fy0;
+ bf = -bf;
+ }
+ else {
+ /* y1 <= y2 <= y0 */
+ vMin = v1; vMid = v2; vMax = v0;
+ vMin_fy = fy1; vMid_fy = fy2; vMax_fy = fy0;
+ }
+ }
+
+ /* fixed point X coords */
+ vMin_fx = FloatToFixed(vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
+ vMid_fx = FloatToFixed(vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
+ vMax_fx = FloatToFixed(vMax->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
+ }
+
+ /* vertex/edge relationship */
+ eMaj.v0 = vMin; eMaj.v1 = vMax; /*TODO: .v1's not needed */
+ eTop.v0 = vMid; eTop.v1 = vMax;
+ eBot.v0 = vMin; eBot.v1 = vMid;
+
+ /* compute deltas for each edge: vertex[upper] - vertex[lower] */
+ eMaj.dx = FixedToFloat(vMax_fx - vMin_fx);
+ eMaj.dy = FixedToFloat(vMax_fy - vMin_fy);
+ eTop.dx = FixedToFloat(vMax_fx - vMid_fx);
+ eTop.dy = FixedToFloat(vMax_fy - vMid_fy);
+ eBot.dx = FixedToFloat(vMid_fx - vMin_fx);
+ eBot.dy = FixedToFloat(vMid_fy - vMin_fy);
+
+ /* compute area, oneOverArea and perform backface culling */
+ {
+ const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
+
+ if (IS_INF_OR_NAN(area) || area == 0.0F)
+ return;
+
+ if (area * bf * swrast->_BackfaceCullSign < 0.0)
+ return;
+
+ oneOverArea = 1.0F / area;
+
+ /* 0 = front, 1 = back */
+ span.facing = oneOverArea * bf > 0.0F;
+ }
+
+ /* Edge setup. For a triangle strip these could be reused... */
+ {
+ eMaj.fsy = FixedCeil(vMin_fy);
+ eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy));
+ if (eMaj.lines > 0) {
+ eMaj.dxdy = eMaj.dx / eMaj.dy;
+ eMaj.fdxdy = SignedFloatToFixed(eMaj.dxdy);
+ eMaj.adjy = (GLfloat) (eMaj.fsy - vMin_fy); /* SCALED! */
+ eMaj.fx0 = vMin_fx;
+ eMaj.fsx = eMaj.fx0 + (GLfixed) (eMaj.adjy * eMaj.dxdy);
+ }
+ else {
+ return; /*CULLED*/
+ }
+
+ eTop.fsy = FixedCeil(vMid_fy);
+ eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy));
+ if (eTop.lines > 0) {
+ eTop.dxdy = eTop.dx / eTop.dy;
+ eTop.fdxdy = SignedFloatToFixed(eTop.dxdy);
+ eTop.adjy = (GLfloat) (eTop.fsy - vMid_fy); /* SCALED! */
+ eTop.fx0 = vMid_fx;
+ eTop.fsx = eTop.fx0 + (GLfixed) (eTop.adjy * eTop.dxdy);
+ }
+
+ eBot.fsy = FixedCeil(vMin_fy);
+ eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy));
+ if (eBot.lines > 0) {
+ eBot.dxdy = eBot.dx / eBot.dy;
+ eBot.fdxdy = SignedFloatToFixed(eBot.dxdy);
+ eBot.adjy = (GLfloat) (eBot.fsy - vMin_fy); /* SCALED! */
+ eBot.fx0 = vMin_fx;
+ eBot.fsx = eBot.fx0 + (GLfixed) (eBot.adjy * eBot.dxdy);
+ }
+ }
+
+ /*
+ * Conceptually, we view a triangle as two subtriangles
+ * separated by a perfectly horizontal line. The edge that is
+ * intersected by this line is one with maximal absolute dy; we
+ * call it a ``major'' edge. The other two edges are the
+ * ``top'' edge (for the upper subtriangle) and the ``bottom''
+ * edge (for the lower subtriangle). If either of these two
+ * edges is horizontal or very close to horizontal, the
+ * corresponding subtriangle might cover zero sample points;
+ * we take care to handle such cases, for performance as well
+ * as correctness.
+ *
+ * By stepping rasterization parameters along the major edge,
+ * we can avoid recomputing them at the discontinuity where
+ * the top and bottom edges meet. However, this forces us to
+ * be able to scan both left-to-right and right-to-left.
+ * Also, we must determine whether the major edge is at the
+ * left or right side of the triangle. We do this by
+ * computing the magnitude of the cross-product of the major
+ * and top edges. Since this magnitude depends on the sine of
+ * the angle between the two edges, its sign tells us whether
+ * we turn to the left or to the right when travelling along
+ * the major edge to the top edge, and from this we infer
+ * whether the major edge is on the left or the right.
+ *
+ * Serendipitously, this cross-product magnitude is also a
+ * value we need to compute the iteration parameter
+ * derivatives for the triangle, and it can be used to perform
+ * backface culling because its sign tells us whether the
+ * triangle is clockwise or counterclockwise. In this code we
+ * refer to it as ``area'' because it's also proportional to
+ * the pixel area of the triangle.
+ */
+
+ {
+ GLint scan_from_left_to_right; /* true if scanning left-to-right */
+
+ /*
+ * Execute user-supplied setup code
+ */
+#ifdef SETUP_CODE
+ SETUP_CODE
+#endif
+
+ scan_from_left_to_right = (oneOverArea < 0.0F);
+
+
+ /* compute d?/dx and d?/dy derivatives */
+#ifdef INTERP_Z
+ span.interpMask |= SPAN_Z;
+ {
+ GLfloat eMaj_dz = vMax->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2];
+ GLfloat eBot_dz = vMid->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2];
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
+ if (span.attrStepX[FRAG_ATTRIB_WPOS][2] > maxDepth ||
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] < -maxDepth) {
+ /* probably a sliver triangle */
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_WPOS][2] = 0.0;
+ }
+ else {
+ span.attrStepY[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
+ }
+ if (depthBits <= 16)
+ span.zStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_WPOS][2]);
+ else
+ span.zStep = (GLint) span.attrStepX[FRAG_ATTRIB_WPOS][2];
+ }
+#endif
+#ifdef INTERP_RGB
+ span.interpMask |= SPAN_RGBA;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ GLfloat eMaj_dr = (GLfloat) (vMax->color[RCOMP] - vMin->color[RCOMP]);
+ GLfloat eBot_dr = (GLfloat) (vMid->color[RCOMP] - vMin->color[RCOMP]);
+ GLfloat eMaj_dg = (GLfloat) (vMax->color[GCOMP] - vMin->color[GCOMP]);
+ GLfloat eBot_dg = (GLfloat) (vMid->color[GCOMP] - vMin->color[GCOMP]);
+ GLfloat eMaj_db = (GLfloat) (vMax->color[BCOMP] - vMin->color[BCOMP]);
+ GLfloat eBot_db = (GLfloat) (vMid->color[BCOMP] - vMin->color[BCOMP]);
+# ifdef INTERP_ALPHA
+ GLfloat eMaj_da = (GLfloat) (vMax->color[ACOMP] - vMin->color[ACOMP]);
+ GLfloat eBot_da = (GLfloat) (vMid->color[ACOMP] - vMin->color[ACOMP]);
+# endif
+ span.attrStepX[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
+ span.attrStepY[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
+ span.attrStepY[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
+ span.attrStepY[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ span.redStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][0]);
+ span.greenStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][1]);
+ span.blueStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][2]);
+# ifdef INTERP_ALPHA
+ span.attrStepX[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+ span.attrStepY[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+ span.alphaStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][3]);
+# endif /* INTERP_ALPHA */
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ span.interpMask |= SPAN_FLAT;
+ span.attrStepX[FRAG_ATTRIB_COL0][0] = span.attrStepY[FRAG_ATTRIB_COL0][0] = 0.0F;
+ span.attrStepX[FRAG_ATTRIB_COL0][1] = span.attrStepY[FRAG_ATTRIB_COL0][1] = 0.0F;
+ span.attrStepX[FRAG_ATTRIB_COL0][2] = span.attrStepY[FRAG_ATTRIB_COL0][2] = 0.0F;
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+# ifdef INTERP_ALPHA
+ span.attrStepX[FRAG_ATTRIB_COL0][3] = span.attrStepY[FRAG_ATTRIB_COL0][3] = 0.0F;
+ span.alphaStep = 0;
+# endif
+ }
+#endif /* INTERP_RGB */
+#ifdef INTERP_INT_TEX
+ {
+ GLfloat eMaj_ds = (vMax->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+ GLfloat eBot_ds = (vMid->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+ GLfloat eMaj_dt = (vMax->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+ GLfloat eBot_dt = (vMid->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+ span.attrStepX[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+ span.attrStepY[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+ span.attrStepY[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ span.intTexStep[0] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+ span.intTexStep[1] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][1]);
+ }
+#endif
+#ifdef INTERP_ATTRIBS
+ {
+ /* attrib[FRAG_ATTRIB_WPOS][3] is 1/W */
+ const GLfloat wMax = vMax->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat wMin = vMin->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat wMid = vMid->attrib[FRAG_ATTRIB_WPOS][3];
+ {
+ const GLfloat eMaj_dw = wMax - wMin;
+ const GLfloat eBot_dw = wMid - wMin;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw);
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx);
+ }
+ ATTRIB_LOOP_BEGIN
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ ASSIGN_4V(span.attrStepX[attr], 0.0, 0.0, 0.0, 0.0);
+ ASSIGN_4V(span.attrStepY[attr], 0.0, 0.0, 0.0, 0.0);
+ }
+ else {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ GLfloat eMaj_da = vMax->attrib[attr][c] * wMax - vMin->attrib[attr][c] * wMin;
+ GLfloat eBot_da = vMid->attrib[attr][c] * wMid - vMin->attrib[attr][c] * wMin;
+ span.attrStepX[attr][c] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+ span.attrStepY[attr][c] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+ }
+ }
+ ATTRIB_LOOP_END
+ }
+#endif
+
+ /*
+ * We always sample at pixel centers. However, we avoid
+ * explicit half-pixel offsets in this code by incorporating
+ * the proper offset in each of x and y during the
+ * transformation to window coordinates.
+ *
+ * We also apply the usual rasterization rules to prevent
+ * cracks and overlaps. A pixel is considered inside a
+ * subtriangle if it meets all of four conditions: it is on or
+ * to the right of the left edge, strictly to the left of the
+ * right edge, on or below the top edge, and strictly above
+ * the bottom edge. (Some edges may be degenerate.)
+ *
+ * The following discussion assumes left-to-right scanning
+ * (that is, the major edge is on the left); the right-to-left
+ * case is a straightforward variation.
+ *
+ * We start by finding the half-integral y coordinate that is
+ * at or below the top of the triangle. This gives us the
+ * first scan line that could possibly contain pixels that are
+ * inside the triangle.
+ *
+ * Next we creep down the major edge until we reach that y,
+ * and compute the corresponding x coordinate on the edge.
+ * Then we find the half-integral x that lies on or just
+ * inside the edge. This is the first pixel that might lie in
+ * the interior of the triangle. (We won't know for sure
+ * until we check the other edges.)
+ *
+ * As we rasterize the triangle, we'll step down the major
+ * edge. For each step in y, we'll move an integer number
+ * of steps in x. There are two possible x step sizes, which
+ * we'll call the ``inner'' step (guaranteed to land on the
+ * edge or inside it) and the ``outer'' step (guaranteed to
+ * land on the edge or outside it). The inner and outer steps
+ * differ by one. During rasterization we maintain an error
+ * term that indicates our distance from the true edge, and
+ * select either the inner step or the outer step, whichever
+ * gets us to the first pixel that falls inside the triangle.
+ *
+ * All parameters (z, red, etc.) as well as the buffer
+ * addresses for color and z have inner and outer step values,
+ * so that we can increment them appropriately. This method
+ * eliminates the need to adjust parameters by creeping a
+ * sub-pixel amount into the triangle at each scanline.
+ */
+
+ {
+ GLint subTriangle;
+ GLfixed fxLeftEdge = 0, fxRightEdge = 0;
+ GLfixed fdxLeftEdge = 0, fdxRightEdge = 0;
+ GLfixed fError = 0, fdError = 0;
+#ifdef PIXEL_ADDRESS
+ PIXEL_TYPE *pRow = NULL;
+ GLint dPRowOuter = 0, dPRowInner; /* offset in bytes */
+#endif
+#ifdef INTERP_Z
+# ifdef DEPTH_TYPE
+ struct gl_renderbuffer *zrb
+ = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ DEPTH_TYPE *zRow = NULL;
+ GLint dZRowOuter = 0, dZRowInner; /* offset in bytes */
+# endif
+ GLuint zLeft = 0;
+ GLfixed fdzOuter = 0, fdzInner;
+#endif
+#ifdef INTERP_RGB
+ GLint rLeft = 0, fdrOuter = 0, fdrInner;
+ GLint gLeft = 0, fdgOuter = 0, fdgInner;
+ GLint bLeft = 0, fdbOuter = 0, fdbInner;
+#endif
+#ifdef INTERP_ALPHA
+ GLint aLeft = 0, fdaOuter = 0, fdaInner;
+#endif
+#ifdef INTERP_INT_TEX
+ GLfixed sLeft=0, dsOuter=0, dsInner;
+ GLfixed tLeft=0, dtOuter=0, dtInner;
+#endif
+#ifdef INTERP_ATTRIBS
+ GLfloat wLeft = 0, dwOuter = 0, dwInner;
+ GLfloat attrLeft[FRAG_ATTRIB_MAX][4];
+ GLfloat daOuter[FRAG_ATTRIB_MAX][4], daInner[FRAG_ATTRIB_MAX][4];
+#endif
+
+ for (subTriangle=0; subTriangle<=1; subTriangle++) {
+ EdgeT *eLeft, *eRight;
+ int setupLeft, setupRight;
+ int lines;
+
+ if (subTriangle==0) {
+ /* bottom half */
+ if (scan_from_left_to_right) {
+ eLeft = &eMaj;
+ eRight = &eBot;
+ lines = eRight->lines;
+ setupLeft = 1;
+ setupRight = 1;
+ }
+ else {
+ eLeft = &eBot;
+ eRight = &eMaj;
+ lines = eLeft->lines;
+ setupLeft = 1;
+ setupRight = 1;
+ }
+ }
+ else {
+ /* top half */
+ if (scan_from_left_to_right) {
+ eLeft = &eMaj;
+ eRight = &eTop;
+ lines = eRight->lines;
+ setupLeft = 0;
+ setupRight = 1;
+ }
+ else {
+ eLeft = &eTop;
+ eRight = &eMaj;
+ lines = eLeft->lines;
+ setupLeft = 1;
+ setupRight = 0;
+ }
+ if (lines == 0)
+ return;
+ }
+
+ if (setupLeft && eLeft->lines > 0) {
+ const SWvertex *vLower = eLeft->v0;
+ const GLfixed fsy = eLeft->fsy;
+ const GLfixed fsx = eLeft->fsx; /* no fractional part */
+ const GLfixed fx = FixedCeil(fsx); /* no fractional part */
+ const GLfixed adjx = (GLfixed) (fx - eLeft->fx0); /* SCALED! */
+ const GLfixed adjy = (GLfixed) eLeft->adjy; /* SCALED! */
+ GLint idxOuter;
+ GLfloat dxOuter;
+ GLfixed fdxOuter;
+
+ fError = fx - fsx - FIXED_ONE;
+ fxLeftEdge = fsx - FIXED_EPSILON;
+ fdxLeftEdge = eLeft->fdxdy;
+ fdxOuter = FixedFloor(fdxLeftEdge - FIXED_EPSILON);
+ fdError = fdxOuter - fdxLeftEdge + FIXED_ONE;
+ idxOuter = FixedToInt(fdxOuter);
+ dxOuter = (GLfloat) idxOuter;
+ span.y = FixedToInt(fsy);
+
+ /* silence warnings on some compilers */
+ (void) dxOuter;
+ (void) adjx;
+ (void) adjy;
+ (void) vLower;
+
+#ifdef PIXEL_ADDRESS
+ {
+ pRow = (PIXEL_TYPE *) PIXEL_ADDRESS(FixedToInt(fxLeftEdge), span.y);
+ dPRowOuter = -((int)BYTES_PER_ROW) + idxOuter * sizeof(PIXEL_TYPE);
+ /* negative because Y=0 at bottom and increases upward */
+ }
+#endif
+ /*
+ * Now we need the set of parameter (z, color, etc.) values at
+ * the point (fx, fsy). This gives us properly-sampled parameter
+ * values that we can step from pixel to pixel. Furthermore,
+ * although we might have intermediate results that overflow
+ * the normal parameter range when we step temporarily outside
+ * the triangle, we shouldn't overflow or underflow for any
+ * pixel that's actually inside the triangle.
+ */
+
+#ifdef INTERP_Z
+ {
+ GLfloat z0 = vLower->attrib[FRAG_ATTRIB_WPOS][2];
+ if (depthBits <= 16) {
+ /* interpolate fixed-pt values */
+ GLfloat tmp = (z0 * FIXED_SCALE
+ + span.attrStepX[FRAG_ATTRIB_WPOS][2] * adjx
+ + span.attrStepY[FRAG_ATTRIB_WPOS][2] * adjy) + FIXED_HALF;
+ if (tmp < MAX_GLUINT / 2)
+ zLeft = (GLfixed) tmp;
+ else
+ zLeft = MAX_GLUINT / 2;
+ fdzOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_WPOS][2] +
+ dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
+ }
+ else {
+ /* interpolate depth values w/out scaling */
+ zLeft = (GLuint) (z0 + span.attrStepX[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjx)
+ + span.attrStepY[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjy));
+ fdzOuter = (GLint) (span.attrStepY[FRAG_ATTRIB_WPOS][2] +
+ dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
+ }
+# ifdef DEPTH_TYPE
+ zRow = (DEPTH_TYPE *)
+ zrb->GetPointer(ctx, zrb, FixedToInt(fxLeftEdge), span.y);
+ dZRowOuter = (ctx->DrawBuffer->Width + idxOuter) * sizeof(DEPTH_TYPE);
+# endif
+ }
+#endif
+#ifdef INTERP_RGB
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][0] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][0] * adjy) + FIXED_HALF;
+ gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][1] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][1] * adjy) + FIXED_HALF;
+ bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][2] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][2] * adjy) + FIXED_HALF;
+ fdrOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][0]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][0]);
+ fdgOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][1]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][1]);
+ fdbOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][2]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][2]);
+# ifdef INTERP_ALPHA
+ aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][3] * adjy) + FIXED_HALF;
+ fdaOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][3]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][3]);
+# endif
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ rLeft = ChanToFixed(v2->color[RCOMP]);
+ gLeft = ChanToFixed(v2->color[GCOMP]);
+ bLeft = ChanToFixed(v2->color[BCOMP]);
+ fdrOuter = fdgOuter = fdbOuter = 0;
+# ifdef INTERP_ALPHA
+ aLeft = ChanToFixed(v2->color[ACOMP]);
+ fdaOuter = 0;
+# endif
+ }
+#endif /* INTERP_RGB */
+
+
+#ifdef INTERP_INT_TEX
+ {
+ GLfloat s0, t0;
+ s0 = vLower->attrib[FRAG_ATTRIB_TEX0][0] * S_SCALE;
+ sLeft = (GLfixed)(s0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][0] * adjx
+ + span.attrStepY[FRAG_ATTRIB_TEX0][0] * adjy) + FIXED_HALF;
+ dsOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][0]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+
+ t0 = vLower->attrib[FRAG_ATTRIB_TEX0][1] * T_SCALE;
+ tLeft = (GLfixed)(t0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][1] * adjx
+ + span.attrStepY[FRAG_ATTRIB_TEX0][1] * adjy) + FIXED_HALF;
+ dtOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][1]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][1]);
+ }
+#endif
+#ifdef INTERP_ATTRIBS
+ {
+ const GLuint attr = FRAG_ATTRIB_WPOS;
+ wLeft = vLower->attrib[FRAG_ATTRIB_WPOS][3]
+ + (span.attrStepX[attr][3] * adjx
+ + span.attrStepY[attr][3] * adjy) * (1.0F/FIXED_SCALE);
+ dwOuter = span.attrStepY[attr][3] + dxOuter * span.attrStepX[attr][3];
+ }
+ ATTRIB_LOOP_BEGIN
+ const GLfloat invW = vLower->attrib[FRAG_ATTRIB_WPOS][3];
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] = v2->attrib[attr][c] * invW;
+ daOuter[attr][c] = 0.0;
+ }
+ }
+ else {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ const GLfloat a = vLower->attrib[attr][c] * invW;
+ attrLeft[attr][c] = a + ( span.attrStepX[attr][c] * adjx
+ + span.attrStepY[attr][c] * adjy) * (1.0F/FIXED_SCALE);
+ daOuter[attr][c] = span.attrStepY[attr][c] + dxOuter * span.attrStepX[attr][c];
+ }
+ }
+ ATTRIB_LOOP_END
+#endif
+ } /*if setupLeft*/
+
+
+ if (setupRight && eRight->lines>0) {
+ fxRightEdge = eRight->fsx - FIXED_EPSILON;
+ fdxRightEdge = eRight->fdxdy;
+ }
+
+ if (lines==0) {
+ continue;
+ }
+
+
+ /* Rasterize setup */
+#ifdef PIXEL_ADDRESS
+ dPRowInner = dPRowOuter + sizeof(PIXEL_TYPE);
+#endif
+#ifdef INTERP_Z
+# ifdef DEPTH_TYPE
+ dZRowInner = dZRowOuter + sizeof(DEPTH_TYPE);
+# endif
+ fdzInner = fdzOuter + span.zStep;
+#endif
+#ifdef INTERP_RGB
+ fdrInner = fdrOuter + span.redStep;
+ fdgInner = fdgOuter + span.greenStep;
+ fdbInner = fdbOuter + span.blueStep;
+#endif
+#ifdef INTERP_ALPHA
+ fdaInner = fdaOuter + span.alphaStep;
+#endif
+#ifdef INTERP_INT_TEX
+ dsInner = dsOuter + span.intTexStep[0];
+ dtInner = dtOuter + span.intTexStep[1];
+#endif
+#ifdef INTERP_ATTRIBS
+ dwInner = dwOuter + span.attrStepX[FRAG_ATTRIB_WPOS][3];
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ daInner[attr][c] = daOuter[attr][c] + span.attrStepX[attr][c];
+ }
+ ATTRIB_LOOP_END
+#endif
+
+ while (lines > 0) {
+ /* initialize the span interpolants to the leftmost value */
+ /* ff = fixed-pt fragment */
+ const GLint right = FixedToInt(fxRightEdge);
+ span.x = FixedToInt(fxLeftEdge);
+ if (right <= span.x)
+ span.end = 0;
+ else
+ span.end = right - span.x;
+
+#ifdef INTERP_Z
+ span.z = zLeft;
+#endif
+#ifdef INTERP_RGB
+ span.red = rLeft;
+ span.green = gLeft;
+ span.blue = bLeft;
+#endif
+#ifdef INTERP_ALPHA
+ span.alpha = aLeft;
+#endif
+#ifdef INTERP_INT_TEX
+ span.intTex[0] = sLeft;
+ span.intTex[1] = tLeft;
+#endif
+
+#ifdef INTERP_ATTRIBS
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = wLeft;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ span.attrStart[attr][c] = attrLeft[attr][c];
+ }
+ ATTRIB_LOOP_END
+#endif
+
+ /* This is where we actually generate fragments */
+ /* XXX the test for span.y > 0 _shouldn't_ be needed but
+ * it fixes a problem on 64-bit Opterons (bug 4842).
+ */
+ if (span.end > 0 && span.y >= 0) {
+ const GLint len = span.end - 1;
+ (void) len;
+#ifdef INTERP_RGB
+ CLAMP_INTERPOLANT(red, redStep, len);
+ CLAMP_INTERPOLANT(green, greenStep, len);
+ CLAMP_INTERPOLANT(blue, blueStep, len);
+#endif
+#ifdef INTERP_ALPHA
+ CLAMP_INTERPOLANT(alpha, alphaStep, len);
+#endif
+ {
+ RENDER_SPAN( span );
+ }
+ }
+
+ /*
+ * Advance to the next scan line. Compute the
+ * new edge coordinates, and adjust the
+ * pixel-center x coordinate so that it stays
+ * on or inside the major edge.
+ */
+ span.y++;
+ lines--;
+
+ fxLeftEdge += fdxLeftEdge;
+ fxRightEdge += fdxRightEdge;
+
+ fError += fdError;
+ if (fError >= 0) {
+ fError -= FIXED_ONE;
+
+#ifdef PIXEL_ADDRESS
+ pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowOuter);
+#endif
+#ifdef INTERP_Z
+# ifdef DEPTH_TYPE
+ zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowOuter);
+# endif
+ zLeft += fdzOuter;
+#endif
+#ifdef INTERP_RGB
+ rLeft += fdrOuter;
+ gLeft += fdgOuter;
+ bLeft += fdbOuter;
+#endif
+#ifdef INTERP_ALPHA
+ aLeft += fdaOuter;
+#endif
+#ifdef INTERP_INT_TEX
+ sLeft += dsOuter;
+ tLeft += dtOuter;
+#endif
+#ifdef INTERP_ATTRIBS
+ wLeft += dwOuter;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] += daOuter[attr][c];
+ }
+ ATTRIB_LOOP_END
+#endif
+ }
+ else {
+#ifdef PIXEL_ADDRESS
+ pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowInner);
+#endif
+#ifdef INTERP_Z
+# ifdef DEPTH_TYPE
+ zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowInner);
+# endif
+ zLeft += fdzInner;
+#endif
+#ifdef INTERP_RGB
+ rLeft += fdrInner;
+ gLeft += fdgInner;
+ bLeft += fdbInner;
+#endif
+#ifdef INTERP_ALPHA
+ aLeft += fdaInner;
+#endif
+#ifdef INTERP_INT_TEX
+ sLeft += dsInner;
+ tLeft += dtInner;
+#endif
+#ifdef INTERP_ATTRIBS
+ wLeft += dwInner;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] += daInner[attr][c];
+ }
+ ATTRIB_LOOP_END
+#endif
+ }
+ } /*while lines>0*/
+
+ } /* for subTriangle */
+
+ }
+ }
+}
+
+#undef SETUP_CODE
+#undef RENDER_SPAN
+
+#undef PIXEL_TYPE
+#undef BYTES_PER_ROW
+#undef PIXEL_ADDRESS
+#undef DEPTH_TYPE
+
+#undef INTERP_Z
+#undef INTERP_RGB
+#undef INTERP_ALPHA
+#undef INTERP_INT_TEX
+#undef INTERP_ATTRIBS
+
+#undef S_SCALE
+#undef T_SCALE
+
+#undef FixedToDepth
+
+#undef NAME
diff --git a/mesalib/src/mesa/swrast/s_zoom.c b/mesalib/src/mesa/swrast/s_zoom.c index f224627d5..3b99bf754 100644 --- a/mesalib/src/mesa/swrast/s_zoom.c +++ b/mesalib/src/mesa/swrast/s_zoom.c @@ -1,433 +1,433 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.h" -#include "main/macros.h" -#include "main/imports.h" -#include "main/colormac.h" - -#include "s_context.h" -#include "s_span.h" -#include "s_stencil.h" -#include "s_zoom.h" - - -/** - * Compute the bounds of the region resulting from zooming a pixel span. - * The resulting region will be entirely inside the window/scissor bounds - * so no additional clipping is needed. - * \param imageX, imageY position of the mage being drawn (gl WindowPos) - * \param spanX, spanY position of span being drawing - * \param width number of pixels in span - * \param x0, x1 returned X bounds of zoomed region [x0, x1) - * \param y0, y1 returned Y bounds of zoomed region [y0, y1) - * \return GL_TRUE if any zoomed pixels visible, GL_FALSE if totally clipped - */ -static GLboolean -compute_zoomed_bounds(GLcontext *ctx, GLint imageX, GLint imageY, - GLint spanX, GLint spanY, GLint width, - GLint *x0, GLint *x1, GLint *y0, GLint *y1) -{ - const struct gl_framebuffer *fb = ctx->DrawBuffer; - GLint c0, c1, r0, r1; - - ASSERT(spanX >= imageX); - ASSERT(spanY >= imageY); - - /* - * Compute destination columns: [c0, c1) - */ - c0 = imageX + (GLint) ((spanX - imageX) * ctx->Pixel.ZoomX); - c1 = imageX + (GLint) ((spanX + width - imageX) * ctx->Pixel.ZoomX); - if (c1 < c0) { - /* swap */ - GLint tmp = c1; - c1 = c0; - c0 = tmp; - } - c0 = CLAMP(c0, fb->_Xmin, fb->_Xmax); - c1 = CLAMP(c1, fb->_Xmin, fb->_Xmax); - if (c0 == c1) { - return GL_FALSE; /* no width */ - } - - /* - * Compute destination rows: [r0, r1) - */ - r0 = imageY + (GLint) ((spanY - imageY) * ctx->Pixel.ZoomY); - r1 = imageY + (GLint) ((spanY + 1 - imageY) * ctx->Pixel.ZoomY); - if (r1 < r0) { - /* swap */ - GLint tmp = r1; - r1 = r0; - r0 = tmp; - } - r0 = CLAMP(r0, fb->_Ymin, fb->_Ymax); - r1 = CLAMP(r1, fb->_Ymin, fb->_Ymax); - if (r0 == r1) { - return GL_FALSE; /* no height */ - } - - *x0 = c0; - *x1 = c1; - *y0 = r0; - *y1 = r1; - - return GL_TRUE; -} - - -/** - * Convert a zoomed x image coordinate back to an unzoomed x coord. - * 'zx' is screen position of a pixel in the zoomed image, who's left edge - * is at 'imageX'. - * return corresponding x coord in the original, unzoomed image. - * This can use this for unzooming X or Y values. - */ -static INLINE GLint -unzoom_x(GLfloat zoomX, GLint imageX, GLint zx) -{ - /* - zx = imageX + (x - imageX) * zoomX; - zx - imageX = (x - imageX) * zoomX; - (zx - imageX) / zoomX = x - imageX; - */ - GLint x; - if (zoomX < 0.0) - zx++; - x = imageX + (GLint) ((zx - imageX) / zoomX); - return x; -} - - - -/** - * Helper function called from _swrast_write_zoomed_rgba/rgb/ - * index/depth_span(). - */ -static void -zoom_span( GLcontext *ctx, GLint imgX, GLint imgY, const SWspan *span, - const GLvoid *src, GLenum format ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - SWspan zoomed; - GLint x0, x1, y0, y1; - GLint zoomedWidth; - - if (!compute_zoomed_bounds(ctx, imgX, imgY, span->x, span->y, span->end, - &x0, &x1, &y0, &y1)) { - return; /* totally clipped */ - } - - if (!swrast->ZoomedArrays) { - /* allocate on demand */ - swrast->ZoomedArrays = (SWspanarrays *) CALLOC(sizeof(SWspanarrays)); - if (!swrast->ZoomedArrays) - return; - } - - zoomedWidth = x1 - x0; - ASSERT(zoomedWidth > 0); - ASSERT(zoomedWidth <= MAX_WIDTH); - - /* no pixel arrays! must be horizontal spans. */ - ASSERT((span->arrayMask & SPAN_XY) == 0); - ASSERT(span->primitive == GL_BITMAP); - - INIT_SPAN(zoomed, GL_BITMAP); - zoomed.x = x0; - zoomed.end = zoomedWidth; - zoomed.array = swrast->ZoomedArrays; - zoomed.array->ChanType = span->array->ChanType; - if (zoomed.array->ChanType == GL_UNSIGNED_BYTE) - zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->rgba8; - else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT) - zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->rgba16; - else - zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->attribs[FRAG_ATTRIB_COL0]; - - COPY_4V(zoomed.attrStart[FRAG_ATTRIB_WPOS], span->attrStart[FRAG_ATTRIB_WPOS]); - COPY_4V(zoomed.attrStepX[FRAG_ATTRIB_WPOS], span->attrStepX[FRAG_ATTRIB_WPOS]); - COPY_4V(zoomed.attrStepY[FRAG_ATTRIB_WPOS], span->attrStepY[FRAG_ATTRIB_WPOS]); - - zoomed.attrStart[FRAG_ATTRIB_FOGC][0] = span->attrStart[FRAG_ATTRIB_FOGC][0]; - zoomed.attrStepX[FRAG_ATTRIB_FOGC][0] = span->attrStepX[FRAG_ATTRIB_FOGC][0]; - zoomed.attrStepY[FRAG_ATTRIB_FOGC][0] = span->attrStepY[FRAG_ATTRIB_FOGC][0]; - - if (format == GL_RGBA || format == GL_RGB) { - /* copy Z info */ - zoomed.z = span->z; - zoomed.zStep = span->zStep; - /* we'll generate an array of colorss */ - zoomed.interpMask = span->interpMask & ~SPAN_RGBA; - zoomed.arrayMask |= SPAN_RGBA; - zoomed.arrayAttribs |= FRAG_BIT_COL0; /* we'll produce these values */ - ASSERT(span->arrayMask & SPAN_RGBA); - } - else if (format == GL_DEPTH_COMPONENT) { - /* Copy color info */ - zoomed.red = span->red; - zoomed.green = span->green; - zoomed.blue = span->blue; - zoomed.alpha = span->alpha; - zoomed.redStep = span->redStep; - zoomed.greenStep = span->greenStep; - zoomed.blueStep = span->blueStep; - zoomed.alphaStep = span->alphaStep; - /* we'll generate an array of depth values */ - zoomed.interpMask = span->interpMask & ~SPAN_Z; - zoomed.arrayMask |= SPAN_Z; - ASSERT(span->arrayMask & SPAN_Z); - } - else { - _mesa_problem(ctx, "Bad format in zoom_span"); - return; - } - - /* zoom the span horizontally */ - if (format == GL_RGBA) { - if (zoomed.array->ChanType == GL_UNSIGNED_BYTE) { - const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < (GLint) span->end); - COPY_4UBV(zoomed.array->rgba8[i], rgba[j]); - } - } - else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT) { - const GLushort (*rgba)[4] = (const GLushort (*)[4]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < (GLint) span->end); - COPY_4V(zoomed.array->rgba16[i], rgba[j]); - } - } - else { - const GLfloat (*rgba)[4] = (const GLfloat (*)[4]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < span->end); - COPY_4V(zoomed.array->attribs[FRAG_ATTRIB_COL0][i], rgba[j]); - } - } - } - else if (format == GL_RGB) { - if (zoomed.array->ChanType == GL_UNSIGNED_BYTE) { - const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < (GLint) span->end); - zoomed.array->rgba8[i][0] = rgb[j][0]; - zoomed.array->rgba8[i][1] = rgb[j][1]; - zoomed.array->rgba8[i][2] = rgb[j][2]; - zoomed.array->rgba8[i][3] = 0xff; - } - } - else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT) { - const GLushort (*rgb)[3] = (const GLushort (*)[3]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < (GLint) span->end); - zoomed.array->rgba16[i][0] = rgb[j][0]; - zoomed.array->rgba16[i][1] = rgb[j][1]; - zoomed.array->rgba16[i][2] = rgb[j][2]; - zoomed.array->rgba16[i][3] = 0xffff; - } - } - else { - const GLfloat (*rgb)[3] = (const GLfloat (*)[3]) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < span->end); - zoomed.array->attribs[FRAG_ATTRIB_COL0][i][0] = rgb[j][0]; - zoomed.array->attribs[FRAG_ATTRIB_COL0][i][1] = rgb[j][1]; - zoomed.array->attribs[FRAG_ATTRIB_COL0][i][2] = rgb[j][2]; - zoomed.array->attribs[FRAG_ATTRIB_COL0][i][3] = 1.0F; - } - } - } - else if (format == GL_DEPTH_COMPONENT) { - const GLuint *zValues = (const GLuint *) src; - GLint i; - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x; - ASSERT(j >= 0); - ASSERT(j < (GLint) span->end); - zoomed.array->z[i] = zValues[j]; - } - /* Now, fall into the RGB path below */ - format = GL_RGBA; - } - - /* write the span in rows [r0, r1) */ - if (format == GL_RGBA || format == GL_RGB) { - /* Writing the span may modify the colors, so make a backup now if we're - * going to call _swrast_write_zoomed_span() more than once. - * Also, clipping may change the span end value, so store it as well. - */ - const GLint end = zoomed.end; /* save */ - GLuint rgbaSave[MAX_WIDTH][4]; - const GLint pixelSize = - (zoomed.array->ChanType == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : - ((zoomed.array->ChanType == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) - : 4 * sizeof(GLfloat)); - if (y1 - y0 > 1) { - memcpy(rgbaSave, zoomed.array->rgba, zoomed.end * pixelSize); - } - for (zoomed.y = y0; zoomed.y < y1; zoomed.y++) { - _swrast_write_rgba_span(ctx, &zoomed); - zoomed.end = end; /* restore */ - if (y1 - y0 > 1) { - /* restore the colors */ - memcpy(zoomed.array->rgba, rgbaSave, zoomed.end * pixelSize); - } - } - } -} - - -void -_swrast_write_zoomed_rgba_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span, const GLvoid *rgba) -{ - zoom_span(ctx, imgX, imgY, span, rgba, GL_RGBA); -} - - -void -_swrast_write_zoomed_rgb_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span, const GLvoid *rgb) -{ - zoom_span(ctx, imgX, imgY, span, rgb, GL_RGB); -} - - -void -_swrast_write_zoomed_depth_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span) -{ - zoom_span(ctx, imgX, imgY, span, - (const GLvoid *) span->array->z, GL_DEPTH_COMPONENT); -} - - -/** - * Zoom/write stencil values. - * No per-fragment operations are applied. - */ -void -_swrast_write_zoomed_stencil_span(GLcontext *ctx, GLint imgX, GLint imgY, - GLint width, GLint spanX, GLint spanY, - const GLstencil stencil[]) -{ - GLstencil zoomedVals[MAX_WIDTH]; - GLint x0, x1, y0, y1, y; - GLint i, zoomedWidth; - - if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width, - &x0, &x1, &y0, &y1)) { - return; /* totally clipped */ - } - - zoomedWidth = x1 - x0; - ASSERT(zoomedWidth > 0); - ASSERT(zoomedWidth <= MAX_WIDTH); - - /* zoom the span horizontally */ - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX; - ASSERT(j >= 0); - ASSERT(j < width); - zoomedVals[i] = stencil[j]; - } - - /* write the zoomed spans */ - for (y = y0; y < y1; y++) { - _swrast_write_stencil_span(ctx, zoomedWidth, x0, y, zoomedVals); - } -} - - -/** - * Zoom/write z values (16 or 32-bit). - * No per-fragment operations are applied. - */ -void -_swrast_write_zoomed_z_span(GLcontext *ctx, GLint imgX, GLint imgY, - GLint width, GLint spanX, GLint spanY, - const GLvoid *z) -{ - struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer; - GLushort zoomedVals16[MAX_WIDTH]; - GLuint zoomedVals32[MAX_WIDTH]; - GLint x0, x1, y0, y1, y; - GLint i, zoomedWidth; - - if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width, - &x0, &x1, &y0, &y1)) { - return; /* totally clipped */ - } - - zoomedWidth = x1 - x0; - ASSERT(zoomedWidth > 0); - ASSERT(zoomedWidth <= MAX_WIDTH); - - /* zoom the span horizontally */ - if (rb->DataType == GL_UNSIGNED_SHORT) { - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX; - ASSERT(j >= 0); - ASSERT(j < width); - zoomedVals16[i] = ((GLushort *) z)[j]; - } - z = zoomedVals16; - } - else { - ASSERT(rb->DataType == GL_UNSIGNED_INT); - for (i = 0; i < zoomedWidth; i++) { - GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX; - ASSERT(j >= 0); - ASSERT(j < width); - zoomedVals32[i] = ((GLuint *) z)[j]; - } - z = zoomedVals32; - } - - /* write the zoomed spans */ - for (y = y0; y < y1; y++) { - rb->PutRow(ctx, rb, zoomedWidth, x0, y, z, NULL); - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/colormac.h"
+
+#include "s_context.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+/**
+ * Compute the bounds of the region resulting from zooming a pixel span.
+ * The resulting region will be entirely inside the window/scissor bounds
+ * so no additional clipping is needed.
+ * \param imageX, imageY position of the mage being drawn (gl WindowPos)
+ * \param spanX, spanY position of span being drawing
+ * \param width number of pixels in span
+ * \param x0, x1 returned X bounds of zoomed region [x0, x1)
+ * \param y0, y1 returned Y bounds of zoomed region [y0, y1)
+ * \return GL_TRUE if any zoomed pixels visible, GL_FALSE if totally clipped
+ */
+static GLboolean
+compute_zoomed_bounds(struct gl_context *ctx, GLint imageX, GLint imageY,
+ GLint spanX, GLint spanY, GLint width,
+ GLint *x0, GLint *x1, GLint *y0, GLint *y1)
+{
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ GLint c0, c1, r0, r1;
+
+ ASSERT(spanX >= imageX);
+ ASSERT(spanY >= imageY);
+
+ /*
+ * Compute destination columns: [c0, c1)
+ */
+ c0 = imageX + (GLint) ((spanX - imageX) * ctx->Pixel.ZoomX);
+ c1 = imageX + (GLint) ((spanX + width - imageX) * ctx->Pixel.ZoomX);
+ if (c1 < c0) {
+ /* swap */
+ GLint tmp = c1;
+ c1 = c0;
+ c0 = tmp;
+ }
+ c0 = CLAMP(c0, fb->_Xmin, fb->_Xmax);
+ c1 = CLAMP(c1, fb->_Xmin, fb->_Xmax);
+ if (c0 == c1) {
+ return GL_FALSE; /* no width */
+ }
+
+ /*
+ * Compute destination rows: [r0, r1)
+ */
+ r0 = imageY + (GLint) ((spanY - imageY) * ctx->Pixel.ZoomY);
+ r1 = imageY + (GLint) ((spanY + 1 - imageY) * ctx->Pixel.ZoomY);
+ if (r1 < r0) {
+ /* swap */
+ GLint tmp = r1;
+ r1 = r0;
+ r0 = tmp;
+ }
+ r0 = CLAMP(r0, fb->_Ymin, fb->_Ymax);
+ r1 = CLAMP(r1, fb->_Ymin, fb->_Ymax);
+ if (r0 == r1) {
+ return GL_FALSE; /* no height */
+ }
+
+ *x0 = c0;
+ *x1 = c1;
+ *y0 = r0;
+ *y1 = r1;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Convert a zoomed x image coordinate back to an unzoomed x coord.
+ * 'zx' is screen position of a pixel in the zoomed image, who's left edge
+ * is at 'imageX'.
+ * return corresponding x coord in the original, unzoomed image.
+ * This can use this for unzooming X or Y values.
+ */
+static INLINE GLint
+unzoom_x(GLfloat zoomX, GLint imageX, GLint zx)
+{
+ /*
+ zx = imageX + (x - imageX) * zoomX;
+ zx - imageX = (x - imageX) * zoomX;
+ (zx - imageX) / zoomX = x - imageX;
+ */
+ GLint x;
+ if (zoomX < 0.0)
+ zx++;
+ x = imageX + (GLint) ((zx - imageX) / zoomX);
+ return x;
+}
+
+
+
+/**
+ * Helper function called from _swrast_write_zoomed_rgba/rgb/
+ * index/depth_span().
+ */
+static void
+zoom_span( struct gl_context *ctx, GLint imgX, GLint imgY, const SWspan *span,
+ const GLvoid *src, GLenum format )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan zoomed;
+ GLint x0, x1, y0, y1;
+ GLint zoomedWidth;
+
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, span->x, span->y, span->end,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
+ }
+
+ if (!swrast->ZoomedArrays) {
+ /* allocate on demand */
+ swrast->ZoomedArrays = (SWspanarrays *) CALLOC(sizeof(SWspanarrays));
+ if (!swrast->ZoomedArrays)
+ return;
+ }
+
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
+
+ /* no pixel arrays! must be horizontal spans. */
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+ ASSERT(span->primitive == GL_BITMAP);
+
+ INIT_SPAN(zoomed, GL_BITMAP);
+ zoomed.x = x0;
+ zoomed.end = zoomedWidth;
+ zoomed.array = swrast->ZoomedArrays;
+ zoomed.array->ChanType = span->array->ChanType;
+ if (zoomed.array->ChanType == GL_UNSIGNED_BYTE)
+ zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->rgba8;
+ else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT)
+ zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->rgba16;
+ else
+ zoomed.array->rgba = (GLchan (*)[4]) zoomed.array->attribs[FRAG_ATTRIB_COL0];
+
+ COPY_4V(zoomed.attrStart[FRAG_ATTRIB_WPOS], span->attrStart[FRAG_ATTRIB_WPOS]);
+ COPY_4V(zoomed.attrStepX[FRAG_ATTRIB_WPOS], span->attrStepX[FRAG_ATTRIB_WPOS]);
+ COPY_4V(zoomed.attrStepY[FRAG_ATTRIB_WPOS], span->attrStepY[FRAG_ATTRIB_WPOS]);
+
+ zoomed.attrStart[FRAG_ATTRIB_FOGC][0] = span->attrStart[FRAG_ATTRIB_FOGC][0];
+ zoomed.attrStepX[FRAG_ATTRIB_FOGC][0] = span->attrStepX[FRAG_ATTRIB_FOGC][0];
+ zoomed.attrStepY[FRAG_ATTRIB_FOGC][0] = span->attrStepY[FRAG_ATTRIB_FOGC][0];
+
+ if (format == GL_RGBA || format == GL_RGB) {
+ /* copy Z info */
+ zoomed.z = span->z;
+ zoomed.zStep = span->zStep;
+ /* we'll generate an array of colorss */
+ zoomed.interpMask = span->interpMask & ~SPAN_RGBA;
+ zoomed.arrayMask |= SPAN_RGBA;
+ zoomed.arrayAttribs |= FRAG_BIT_COL0; /* we'll produce these values */
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ }
+ else if (format == GL_DEPTH_COMPONENT) {
+ /* Copy color info */
+ zoomed.red = span->red;
+ zoomed.green = span->green;
+ zoomed.blue = span->blue;
+ zoomed.alpha = span->alpha;
+ zoomed.redStep = span->redStep;
+ zoomed.greenStep = span->greenStep;
+ zoomed.blueStep = span->blueStep;
+ zoomed.alphaStep = span->alphaStep;
+ /* we'll generate an array of depth values */
+ zoomed.interpMask = span->interpMask & ~SPAN_Z;
+ zoomed.arrayMask |= SPAN_Z;
+ ASSERT(span->arrayMask & SPAN_Z);
+ }
+ else {
+ _mesa_problem(ctx, "Bad format in zoom_span");
+ return;
+ }
+
+ /* zoom the span horizontally */
+ if (format == GL_RGBA) {
+ if (zoomed.array->ChanType == GL_UNSIGNED_BYTE) {
+ const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < (GLint) span->end);
+ COPY_4UBV(zoomed.array->rgba8[i], rgba[j]);
+ }
+ }
+ else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT) {
+ const GLushort (*rgba)[4] = (const GLushort (*)[4]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < (GLint) span->end);
+ COPY_4V(zoomed.array->rgba16[i], rgba[j]);
+ }
+ }
+ else {
+ const GLfloat (*rgba)[4] = (const GLfloat (*)[4]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ COPY_4V(zoomed.array->attribs[FRAG_ATTRIB_COL0][i], rgba[j]);
+ }
+ }
+ }
+ else if (format == GL_RGB) {
+ if (zoomed.array->ChanType == GL_UNSIGNED_BYTE) {
+ const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < (GLint) span->end);
+ zoomed.array->rgba8[i][0] = rgb[j][0];
+ zoomed.array->rgba8[i][1] = rgb[j][1];
+ zoomed.array->rgba8[i][2] = rgb[j][2];
+ zoomed.array->rgba8[i][3] = 0xff;
+ }
+ }
+ else if (zoomed.array->ChanType == GL_UNSIGNED_SHORT) {
+ const GLushort (*rgb)[3] = (const GLushort (*)[3]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < (GLint) span->end);
+ zoomed.array->rgba16[i][0] = rgb[j][0];
+ zoomed.array->rgba16[i][1] = rgb[j][1];
+ zoomed.array->rgba16[i][2] = rgb[j][2];
+ zoomed.array->rgba16[i][3] = 0xffff;
+ }
+ }
+ else {
+ const GLfloat (*rgb)[3] = (const GLfloat (*)[3]) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ zoomed.array->attribs[FRAG_ATTRIB_COL0][i][0] = rgb[j][0];
+ zoomed.array->attribs[FRAG_ATTRIB_COL0][i][1] = rgb[j][1];
+ zoomed.array->attribs[FRAG_ATTRIB_COL0][i][2] = rgb[j][2];
+ zoomed.array->attribs[FRAG_ATTRIB_COL0][i][3] = 1.0F;
+ }
+ }
+ }
+ else if (format == GL_DEPTH_COMPONENT) {
+ const GLuint *zValues = (const GLuint *) src;
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < (GLint) span->end);
+ zoomed.array->z[i] = zValues[j];
+ }
+ /* Now, fall into the RGB path below */
+ format = GL_RGBA;
+ }
+
+ /* write the span in rows [r0, r1) */
+ if (format == GL_RGBA || format == GL_RGB) {
+ /* Writing the span may modify the colors, so make a backup now if we're
+ * going to call _swrast_write_zoomed_span() more than once.
+ * Also, clipping may change the span end value, so store it as well.
+ */
+ const GLint end = zoomed.end; /* save */
+ GLuint rgbaSave[MAX_WIDTH][4];
+ const GLint pixelSize =
+ (zoomed.array->ChanType == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) :
+ ((zoomed.array->ChanType == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort)
+ : 4 * sizeof(GLfloat));
+ if (y1 - y0 > 1) {
+ memcpy(rgbaSave, zoomed.array->rgba, zoomed.end * pixelSize);
+ }
+ for (zoomed.y = y0; zoomed.y < y1; zoomed.y++) {
+ _swrast_write_rgba_span(ctx, &zoomed);
+ zoomed.end = end; /* restore */
+ if (y1 - y0 > 1) {
+ /* restore the colors */
+ memcpy(zoomed.array->rgba, rgbaSave, zoomed.end * pixelSize);
+ }
+ }
+ }
+}
+
+
+void
+_swrast_write_zoomed_rgba_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span, const GLvoid *rgba)
+{
+ zoom_span(ctx, imgX, imgY, span, rgba, GL_RGBA);
+}
+
+
+void
+_swrast_write_zoomed_rgb_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span, const GLvoid *rgb)
+{
+ zoom_span(ctx, imgX, imgY, span, rgb, GL_RGB);
+}
+
+
+void
+_swrast_write_zoomed_depth_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span)
+{
+ zoom_span(ctx, imgX, imgY, span,
+ (const GLvoid *) span->array->z, GL_DEPTH_COMPONENT);
+}
+
+
+/**
+ * Zoom/write stencil values.
+ * No per-fragment operations are applied.
+ */
+void
+_swrast_write_zoomed_stencil_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLstencil stencil[])
+{
+ GLstencil zoomedVals[MAX_WIDTH];
+ GLint x0, x1, y0, y1, y;
+ GLint i, zoomedWidth;
+
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
+ }
+
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
+
+ /* zoom the span horizontally */
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals[i] = stencil[j];
+ }
+
+ /* write the zoomed spans */
+ for (y = y0; y < y1; y++) {
+ _swrast_write_stencil_span(ctx, zoomedWidth, x0, y, zoomedVals);
+ }
+}
+
+
+/**
+ * Zoom/write z values (16 or 32-bit).
+ * No per-fragment operations are applied.
+ */
+void
+_swrast_write_zoomed_z_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLvoid *z)
+{
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer;
+ GLushort zoomedVals16[MAX_WIDTH];
+ GLuint zoomedVals32[MAX_WIDTH];
+ GLint x0, x1, y0, y1, y;
+ GLint i, zoomedWidth;
+
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
+ }
+
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
+
+ /* zoom the span horizontally */
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals16[i] = ((GLushort *) z)[j];
+ }
+ z = zoomedVals16;
+ }
+ else {
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals32[i] = ((GLuint *) z)[j];
+ }
+ z = zoomedVals32;
+ }
+
+ /* write the zoomed spans */
+ for (y = y0; y < y1; y++) {
+ rb->PutRow(ctx, rb, zoomedWidth, x0, y, z, NULL);
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_zoom.h b/mesalib/src/mesa/swrast/s_zoom.h index 09f624efa..b8d17b5a4 100644 --- a/mesalib/src/mesa/swrast/s_zoom.h +++ b/mesalib/src/mesa/swrast/s_zoom.h @@ -1,56 +1,56 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#ifndef S_ZOOM_H -#define S_ZOOM_H - -#include "main/mtypes.h" -#include "s_span.h" - - -extern void -_swrast_write_zoomed_rgba_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span, const GLvoid *rgba); - -extern void -_swrast_write_zoomed_rgb_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span, const GLvoid *rgb); - -extern void -_swrast_write_zoomed_depth_span(GLcontext *ctx, GLint imgX, GLint imgY, - const SWspan *span); - - -extern void -_swrast_write_zoomed_stencil_span(GLcontext *ctx, GLint imgX, GLint imgY, - GLint width, GLint spanX, GLint spanY, - const GLstencil stencil[]); - -extern void -_swrast_write_zoomed_z_span(GLcontext *ctx, GLint imgX, GLint imgY, - GLint width, GLint spanX, GLint spanY, - const GLvoid *z); - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef S_ZOOM_H
+#define S_ZOOM_H
+
+#include "main/mtypes.h"
+#include "s_span.h"
+
+
+extern void
+_swrast_write_zoomed_rgba_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span, const GLvoid *rgba);
+
+extern void
+_swrast_write_zoomed_rgb_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span, const GLvoid *rgb);
+
+extern void
+_swrast_write_zoomed_depth_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ const SWspan *span);
+
+
+extern void
+_swrast_write_zoomed_stencil_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLstencil stencil[]);
+
+extern void
+_swrast_write_zoomed_z_span(struct gl_context *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLvoid *z);
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/swrast.h b/mesalib/src/mesa/swrast/swrast.h index c01cf7d1f..2db536c7b 100644 --- a/mesalib/src/mesa/swrast/swrast.h +++ b/mesalib/src/mesa/swrast/swrast.h @@ -1,232 +1,232 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - */ - -/** - * \file swrast/swrast.h - * \brief Public interface to the software rasterization functions. - * \author Keith Whitwell <keith@tungstengraphics.com> - */ - -#ifndef SWRAST_H -#define SWRAST_H - -#include "main/mtypes.h" - -/** - * \struct SWvertex - * \brief Data-structure to handle vertices in the software rasterizer. - * - * The software rasterizer now uses this format for vertices. Thus a - * 'RasterSetup' stage or other translation is required between the - * tnl module and the swrast rasterization functions. This serves to - * isolate the swrast module from the internals of the tnl module, and - * improve its usefulness as a fallback mechanism for hardware - * drivers. - * - * wpos = attr[FRAG_ATTRIB_WPOS] and MUST BE THE FIRST values in the - * vertex because of the tnl clipping code. - - * wpos[0] and [1] are the screen-coords of SWvertex. - * wpos[2] is the z-buffer coord (if 16-bit Z buffer, in range [0,65535]). - * wpos[3] is 1/w where w is the clip-space W coord. This is the value - * that clip{XYZ} were multiplied by to get ndc{XYZ}. - * - * Full software drivers: - * - Register the rastersetup and triangle functions from - * utils/software_helper. - * - On statechange, update the rasterization pointers in that module. - * - * Rasterization hardware drivers: - * - Keep native rastersetup. - * - Implement native twoside,offset and unfilled triangle setup. - * - Implement a translator from native vertices to swrast vertices. - * - On partial fallback (mix of accelerated and unaccelerated - * prims), call a pass-through function which translates native - * vertices to SWvertices and calls the appropriate swrast function. - * - On total fallback (vertex format insufficient for state or all - * primitives unaccelerated), hook in swrast_setup instead. - */ -typedef struct { - GLfloat attrib[FRAG_ATTRIB_MAX][4]; - GLchan color[4]; /** integer color */ - GLfloat pointSize; -} SWvertex; - - -#define FRAG_ATTRIB_CI FRAG_ATTRIB_COL0 - - -struct swrast_device_driver; - - -/* These are the public-access functions exported from swrast. - */ - -extern GLboolean -_swrast_CreateContext( GLcontext *ctx ); - -extern void -_swrast_DestroyContext( GLcontext *ctx ); - -/* Get a (non-const) reference to the device driver struct for swrast. - */ -extern struct swrast_device_driver * -_swrast_GetDeviceDriverReference( GLcontext *ctx ); - -extern void -_swrast_Bitmap( GLcontext *ctx, - GLint px, GLint py, - GLsizei width, GLsizei height, - const struct gl_pixelstore_attrib *unpack, - const GLubyte *bitmap ); - -extern void -_swrast_CopyPixels( GLcontext *ctx, - GLint srcx, GLint srcy, - GLint destx, GLint desty, - GLsizei width, GLsizei height, - GLenum type ); - -extern void -_swrast_DrawPixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels ); - -extern void -_swrast_ReadPixels( GLcontext *ctx, - GLint x, GLint y, GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - GLvoid *pixels ); - -extern void -_swrast_BlitFramebuffer(GLcontext *ctx, - GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, - GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, - GLbitfield mask, GLenum filter); - -extern void -_swrast_Clear(GLcontext *ctx, GLbitfield buffers); - -extern void -_swrast_Accum(GLcontext *ctx, GLenum op, GLfloat value); - - - -/* Reset the stipple counter - */ -extern void -_swrast_ResetLineStipple( GLcontext *ctx ); - -/** - * Indicates front/back facing for subsequent points/lines when drawing - * unfilled polygons. Needed for two-side stencil. - */ -extern void -_swrast_SetFacing(GLcontext *ctx, GLuint facing); - -/* These will always render the correct point/line/triangle for the - * current state. - * - * For flatshaded primitives, the provoking vertex is the final one. - */ -extern void -_swrast_Point( GLcontext *ctx, const SWvertex *v ); - -extern void -_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ); - -extern void -_swrast_Triangle( GLcontext *ctx, const SWvertex *v0, - const SWvertex *v1, const SWvertex *v2 ); - -extern void -_swrast_Quad( GLcontext *ctx, - const SWvertex *v0, const SWvertex *v1, - const SWvertex *v2, const SWvertex *v3); - -extern void -_swrast_flush( GLcontext *ctx ); - -extern void -_swrast_render_primitive( GLcontext *ctx, GLenum mode ); - -extern void -_swrast_render_start( GLcontext *ctx ); - -extern void -_swrast_render_finish( GLcontext *ctx ); - -/* Tell the software rasterizer about core state changes. - */ -extern void -_swrast_InvalidateState( GLcontext *ctx, GLbitfield new_state ); - -/* Configure software rasterizer to match hardware rasterizer characteristics: - */ -extern void -_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value ); - -extern void -_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value ); - -/* Debug: - */ -extern void -_swrast_print_vertex( GLcontext *ctx, const SWvertex *v ); - - - -extern void -_swrast_eject_texture_images(GLcontext *ctx); - - - -/** - * The driver interface for the software rasterizer. - * XXX this may go away. - * We may move these functions to ctx->Driver.RenderStart, RenderEnd. - */ -struct swrast_device_driver { - /* - * These are called before and after accessing renderbuffers during - * software rasterization. - * - * These are a suitable place for grabbing/releasing hardware locks. - * - * NOTE: The swrast triangle/line/point routines *DO NOT* call - * these functions. Locking in that case must be organized by the - * driver by other mechanisms. - */ - void (*SpanRenderStart)(GLcontext *ctx); - void (*SpanRenderFinish)(GLcontext *ctx); -}; - - - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/**
+ * \file swrast/swrast.h
+ * \brief Public interface to the software rasterization functions.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#ifndef SWRAST_H
+#define SWRAST_H
+
+#include "main/mtypes.h"
+
+/**
+ * \struct SWvertex
+ * \brief Data-structure to handle vertices in the software rasterizer.
+ *
+ * The software rasterizer now uses this format for vertices. Thus a
+ * 'RasterSetup' stage or other translation is required between the
+ * tnl module and the swrast rasterization functions. This serves to
+ * isolate the swrast module from the internals of the tnl module, and
+ * improve its usefulness as a fallback mechanism for hardware
+ * drivers.
+ *
+ * wpos = attr[FRAG_ATTRIB_WPOS] and MUST BE THE FIRST values in the
+ * vertex because of the tnl clipping code.
+
+ * wpos[0] and [1] are the screen-coords of SWvertex.
+ * wpos[2] is the z-buffer coord (if 16-bit Z buffer, in range [0,65535]).
+ * wpos[3] is 1/w where w is the clip-space W coord. This is the value
+ * that clip{XYZ} were multiplied by to get ndc{XYZ}.
+ *
+ * Full software drivers:
+ * - Register the rastersetup and triangle functions from
+ * utils/software_helper.
+ * - On statechange, update the rasterization pointers in that module.
+ *
+ * Rasterization hardware drivers:
+ * - Keep native rastersetup.
+ * - Implement native twoside,offset and unfilled triangle setup.
+ * - Implement a translator from native vertices to swrast vertices.
+ * - On partial fallback (mix of accelerated and unaccelerated
+ * prims), call a pass-through function which translates native
+ * vertices to SWvertices and calls the appropriate swrast function.
+ * - On total fallback (vertex format insufficient for state or all
+ * primitives unaccelerated), hook in swrast_setup instead.
+ */
+typedef struct {
+ GLfloat attrib[FRAG_ATTRIB_MAX][4];
+ GLchan color[4]; /** integer color */
+ GLfloat pointSize;
+} SWvertex;
+
+
+#define FRAG_ATTRIB_CI FRAG_ATTRIB_COL0
+
+
+struct swrast_device_driver;
+
+
+/* These are the public-access functions exported from swrast.
+ */
+
+extern GLboolean
+_swrast_CreateContext( struct gl_context *ctx );
+
+extern void
+_swrast_DestroyContext( struct gl_context *ctx );
+
+/* Get a (non-const) reference to the device driver struct for swrast.
+ */
+extern struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx );
+
+extern void
+_swrast_Bitmap( struct gl_context *ctx,
+ GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap );
+
+extern void
+_swrast_CopyPixels( struct gl_context *ctx,
+ GLint srcx, GLint srcy,
+ GLint destx, GLint desty,
+ GLsizei width, GLsizei height,
+ GLenum type );
+
+extern void
+_swrast_DrawPixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels );
+
+extern void
+_swrast_ReadPixels( struct gl_context *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ GLvoid *pixels );
+
+extern void
+_swrast_BlitFramebuffer(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter);
+
+extern void
+_swrast_Clear(struct gl_context *ctx, GLbitfield buffers);
+
+extern void
+_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value);
+
+
+
+/* Reset the stipple counter
+ */
+extern void
+_swrast_ResetLineStipple( struct gl_context *ctx );
+
+/**
+ * Indicates front/back facing for subsequent points/lines when drawing
+ * unfilled polygons. Needed for two-side stencil.
+ */
+extern void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing);
+
+/* These will always render the correct point/line/triangle for the
+ * current state.
+ *
+ * For flatshaded primitives, the provoking vertex is the final one.
+ */
+extern void
+_swrast_Point( struct gl_context *ctx, const SWvertex *v );
+
+extern void
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 );
+
+extern void
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2 );
+
+extern void
+_swrast_Quad( struct gl_context *ctx,
+ const SWvertex *v0, const SWvertex *v1,
+ const SWvertex *v2, const SWvertex *v3);
+
+extern void
+_swrast_flush( struct gl_context *ctx );
+
+extern void
+_swrast_render_primitive( struct gl_context *ctx, GLenum mode );
+
+extern void
+_swrast_render_start( struct gl_context *ctx );
+
+extern void
+_swrast_render_finish( struct gl_context *ctx );
+
+/* Tell the software rasterizer about core state changes.
+ */
+extern void
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state );
+
+/* Configure software rasterizer to match hardware rasterizer characteristics:
+ */
+extern void
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value );
+
+extern void
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value );
+
+/* Debug:
+ */
+extern void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v );
+
+
+
+extern void
+_swrast_eject_texture_images(struct gl_context *ctx);
+
+
+
+/**
+ * The driver interface for the software rasterizer.
+ * XXX this may go away.
+ * We may move these functions to ctx->Driver.RenderStart, RenderEnd.
+ */
+struct swrast_device_driver {
+ /*
+ * These are called before and after accessing renderbuffers during
+ * software rasterization.
+ *
+ * These are a suitable place for grabbing/releasing hardware locks.
+ *
+ * NOTE: The swrast triangle/line/point routines *DO NOT* call
+ * these functions. Locking in that case must be organized by the
+ * driver by other mechanisms.
+ */
+ void (*SpanRenderStart)(struct gl_context *ctx);
+ void (*SpanRenderFinish)(struct gl_context *ctx);
+};
+
+
+
+#endif
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