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-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/NOTES55
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/descrip.mms76
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.c554
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.h39
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h329
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.c495
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.h39
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_aatritemp.h549
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c584
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_accum.h37
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c224
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.h39
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.c625
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.h37
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_bitmap.c282
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_blend.c872
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_blend.h43
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c408
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_context.c750
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_context.h411
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c801
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_depth.c1365
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_depth.h56
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c1007
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.h36
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.c161
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.h51
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c327
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_fog.h45
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_fragprog_to_c.c822
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_imaging.c213
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_lines.c338
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_lines.h41
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_linetemp.h454
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_logic.c244
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_logic.h44
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_masking.c172
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_masking.h58
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.c1507
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.h37
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c111
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.h38
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_points.c275
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_points.h39
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_pointtemp.h419
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c584
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_span.c1511
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_span.h75
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_spantemp.h251
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.c1221
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.h53
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_tcc.c189
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_texstore.c430
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_texture.c3963
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_texture.h42
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c1175
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.h51
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_trispan.h31
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_tritemp.h1308
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c428
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.h54
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/swrast.h299
62 files changed, 26774 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/NOTES b/nx-X11/extras/Mesa/src/mesa/swrast/NOTES
new file mode 100644
index 000000000..f906e41b9
--- /dev/null
+++ b/nx-X11/extras/Mesa/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( GLcontext *ctx );
+ void _swrast_DestroyContext( GLcontext *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( GLcontext *ctx, GLuint new_state );
+
+There is no explicit call to put the swrast module to sleep.
+
+
+CUSTOMIZATION
+
+ void (*choose_point)( GLcontext * );
+ void (*choose_line)( GLcontext * );
+ void (*choose_triangle)( GLcontext * );
+
+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/nx-X11/extras/Mesa/src/mesa/swrast/descrip.mms b/nx-X11/extras/Mesa/src/mesa/swrast/descrip.mms
new file mode 100644
index 000000000..7b3562770
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/descrip.mms
@@ -0,0 +1,76 @@
+# Makefile for core library for VMS
+# contributed by Jouk Jansen joukj@hrem.stm.tudelft.nl
+# Last revision : 23 March 2004
+
+.first
+ define gl [---.include.gl]
+ define math [-.math]
+ define swrast [-.swrast]
+ define array_cache [-.array_cache]
+
+.include [---]mms-config.
+
+##### MACROS #####
+
+VPATH = RCS
+
+INCDIR = [---.include],[-.main],[-.glapi],[-.shader]
+LIBDIR = [---.lib]
+CFLAGS = /include=($(INCDIR),[])/define=(PTHREADS=1)/name=(as_is,short)
+
+SOURCES = s_aaline.c s_aatriangle.c s_accum.c s_alpha.c \
+ s_bitmap.c s_blend.c s_buffers.c s_context.c s_copypix.c s_depth.c \
+ s_drawpix.c s_feedback.c s_fog.c s_imaging.c s_lines.c s_logic.c \
+ s_masking.c s_nvfragprog.c s_pixeltex.c s_points.c s_readpix.c \
+ s_span.c s_stencil.c s_texstore.c s_texture.c s_triangle.c s_zoom.c \
+ s_atifragshader.c
+
+OBJECTS = s_aaline.obj,s_aatriangle.obj,s_accum.obj,s_alpha.obj,\
+ s_bitmap.obj,s_blend.obj,\
+ s_buffers.obj,s_context.obj,s_atifragshader.obj,\
+ s_copypix.obj,s_depth.obj,s_drawpix.obj,s_feedback.obj,s_fog.obj,\
+ s_imaging.obj,s_lines.obj,s_logic.obj,s_masking.obj,s_nvfragprog.obj,\
+ s_pixeltex.obj,s_points.obj,s_readpix.obj,s_span.obj,s_stencil.obj,\
+ s_texstore.obj,s_texture.obj,s_triangle.obj,s_zoom.obj
+
+##### RULES #####
+
+VERSION=Mesa V3.4
+
+##### TARGETS #####
+# Make the library
+$(LIBDIR)$(GL_LIB) : $(OBJECTS)
+ @ library $(LIBDIR)$(GL_LIB) $(OBJECTS)
+
+clean :
+ purge
+ delete *.obj;*
+
+s_atifragshader.obj : s_atifragshader.c
+s_aaline.obj : s_aaline.c
+s_aatriangle.obj : s_aatriangle.c
+s_accum.obj : s_accum.c
+s_alpha.obj : s_alpha.c
+s_bitmap.obj : s_bitmap.c
+s_blend.obj : s_blend.c
+s_buffers.obj : s_buffers.c
+s_context.obj : s_context.c
+s_copypix.obj : s_copypix.c
+s_depth.obj : s_depth.c
+s_drawpix.obj : s_drawpix.c
+s_feedback.obj : s_feedback.c
+s_fog.obj : s_fog.c
+s_imaging.obj : s_imaging.c
+s_lines.obj : s_lines.c
+s_logic.obj : s_logic.c
+s_masking.obj : s_masking.c
+s_nvfragprog.obj : s_nvfragprog.c
+s_pixeltex.obj : s_pixeltex.c
+s_points.obj : s_points.c
+s_readpix.obj : s_readpix.c
+s_span.obj : s_span.c
+s_stencil.obj : s_stencil.c
+s_texstore.obj : s_texstore.c
+s_texture.obj : s_texture.c
+s_triangle.obj : s_triangle.c
+s_zoom.obj : s_zoom.c
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.c
new file mode 100644
index 000000000..39c51a50f
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.c
@@ -0,0 +1,554 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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 "glheader.h"
+#include "imports.h"
+#include "macros.h"
+#include "swrast/s_aaline.h"
+#include "swrast/s_context.h"
+#include "swrast/s_span.h"
+#include "swrast/swrast.h"
+#include "mtypes.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_FOG */
+ GLfloat fPlane[4];
+ /* DO_RGBA */
+ GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
+ /* DO_INDEX */
+ GLfloat iPlane[4];
+ /* DO_SPEC */
+ GLfloat srPlane[4], sgPlane[4], sbPlane[4];
+ /* DO_TEX or DO_MULTITEX */
+ GLfloat sPlane[MAX_TEXTURE_COORD_UNITS][4];
+ GLfloat tPlane[MAX_TEXTURE_COORD_UNITS][4];
+ GLfloat uPlane[MAX_TEXTURE_COORD_UNITS][4];
+ GLfloat vPlane[MAX_TEXTURE_COORD_UNITS][4];
+ GLfloat lambda[MAX_TEXTURE_COORD_UNITS];
+ GLfloat texWidth[MAX_TEXTURE_COORD_UNITS];
+ GLfloat texHeight[MAX_TEXTURE_COORD_UNITS];
+
+ struct sw_span 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) (log(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));
+}
+
+
+/**
+ * Compute coverage value for color index mode.
+ * XXX this may not be quite correct.
+ * \return coverage in [0,15].
+ */
+static GLfloat
+compute_coveragei(const struct LineInfo *info,
+ GLint winx, GLint winy)
+{
+ return compute_coveragef(info, winx, winy) * 15.0F;
+}
+
+
+
+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_ci_##x
+#define DO_Z
+#define DO_FOG
+#define DO_INDEX
+#include "s_aalinetemp.h"
+
+
+#define NAME(x) aa_rgba_##x
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#include "s_aalinetemp.h"
+
+
+#define NAME(x) aa_tex_rgba_##x
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_TEX
+#include "s_aalinetemp.h"
+
+
+#define NAME(x) aa_multitex_rgba_##x
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_MULTITEX
+#include "s_aalinetemp.h"
+
+
+#define NAME(x) aa_multitex_spec_##x
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_MULTITEX
+#define DO_SPEC
+#include "s_aalinetemp.h"
+
+
+
+void
+_swrast_choose_aa_line_function(GLcontext *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ ASSERT(ctx->Line.SmoothFlag);
+
+ if (ctx->Visual.rgbMode) {
+ /* RGBA */
+ if (ctx->Texture._EnabledCoordUnits != 0) {
+ if (ctx->Texture._EnabledCoordUnits > 1) {
+ /* Multitextured! */
+ if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR ||
+ ctx->Fog.ColorSumEnabled)
+ swrast->Line = aa_multitex_spec_line;
+ else
+ swrast->Line = aa_multitex_rgba_line;
+ }
+ else {
+ swrast->Line = aa_tex_rgba_line;
+ }
+ }
+ else {
+ swrast->Line = aa_rgba_line;
+ }
+ }
+ else {
+ /* Color Index */
+ swrast->Line = aa_ci_line;
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.h
new file mode 100644
index 000000000..41e7e5fd4
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aaline.h
@@ -0,0 +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_AALINE_H
+#define S_AALINE_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern void
+_swrast_choose_aa_line_function(GLcontext *ctx);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h
new file mode 100644
index 000000000..4a1e1ebda
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h
@@ -0,0 +1,329 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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 GLfloat fx = (GLfloat) ix;
+ const GLfloat fy = (GLfloat) iy;
+#ifdef DO_INDEX
+ const GLfloat coverage = compute_coveragei(line, ix, iy);
+#else
+ const GLfloat coverage = compute_coveragef(line, ix, iy);
+#endif
+ const GLuint i = line->span.end;
+
+ 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] = (GLdepth) IROUND(solve_plane(fx, fy, line->zPlane));
+#endif
+#ifdef DO_FOG
+ line->span.array->fog[i] = solve_plane(fx, fy, line->fPlane);
+#endif
+#ifdef DO_RGBA
+ 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);
+#endif
+#ifdef DO_INDEX
+ line->span.array->index[i] = (GLint) solve_plane(fx, fy, line->iPlane);
+#endif
+#ifdef DO_SPEC
+ line->span.array->spec[i][RCOMP] = solve_plane_chan(fx, fy, line->srPlane);
+ line->span.array->spec[i][GCOMP] = solve_plane_chan(fx, fy, line->sgPlane);
+ line->span.array->spec[i][BCOMP] = solve_plane_chan(fx, fy, line->sbPlane);
+#endif
+#ifdef DO_TEX
+ {
+ GLfloat invQ;
+ if (ctx->FragmentProgram._Active) {
+ invQ = 1.0F;
+ }
+ else {
+ invQ = solve_plane_recip(fx, fy, line->vPlane[0]);
+ }
+ line->span.array->texcoords[0][i][0] = solve_plane(fx, fy, line->sPlane[0]) * invQ;
+ line->span.array->texcoords[0][i][1] = solve_plane(fx, fy, line->tPlane[0]) * invQ;
+ line->span.array->texcoords[0][i][2] = solve_plane(fx, fy, line->uPlane[0]) * invQ;
+ line->span.array->lambda[0][i] = compute_lambda(line->sPlane[0],
+ line->tPlane[0], invQ,
+ line->texWidth[0],
+ line->texHeight[0]);
+ }
+#elif defined(DO_MULTITEX)
+ {
+ GLuint unit;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ GLfloat invQ;
+ if (ctx->FragmentProgram._Active) {
+ invQ = 1.0F;
+ }
+ else {
+ invQ = solve_plane_recip(fx, fy, line->vPlane[unit]);
+ }
+ line->span.array->texcoords[unit][i][0] = solve_plane(fx, fy, line->sPlane[unit]) * invQ;
+ line->span.array->texcoords[unit][i][1] = solve_plane(fx, fy, line->tPlane[unit]) * invQ;
+ line->span.array->texcoords[unit][i][2] = solve_plane(fx, fy, line->uPlane[unit]) * invQ;
+ line->span.array->lambda[unit][i] = compute_lambda(line->sPlane[unit],
+ line->tPlane[unit], invQ,
+ line->texWidth[unit], line->texHeight[unit]);
+ }
+ }
+ }
+#endif
+
+ if (line->span.end == MAX_WIDTH) {
+#if defined(DO_RGBA)
+ _swrast_write_rgba_span(ctx, &(line->span));
+#else
+ _swrast_write_index_span(ctx, &(line->span));
+#endif
+ 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->win[0];
+ line.y0 = v0->win[1];
+ line.x1 = v1->win[0];
+ line.y1 = v1->win[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 * ctx->Line._Width;
+
+ if (line.len == 0.0 || IS_INF_OR_NAN(line.len))
+ return;
+
+ INIT_SPAN(line.span, GL_LINE, 0, 0, SPAN_XY | SPAN_COVERAGE);
+
+ 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->win[2], v1->win[2], line.zPlane);
+#endif
+#ifdef DO_FOG
+ line.span.arrayMask |= SPAN_FOG;
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->fog, v1->fog, line.fPlane);
+#endif
+#ifdef DO_RGBA
+ 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);
+ }
+#endif
+#ifdef DO_SPEC
+ line.span.arrayMask |= SPAN_SPEC;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->specular[RCOMP], v1->specular[RCOMP], line.srPlane);
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->specular[GCOMP], v1->specular[GCOMP], line.sgPlane);
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->specular[BCOMP], v1->specular[BCOMP], line.sbPlane);
+ }
+ else {
+ constant_plane(v1->specular[RCOMP], line.srPlane);
+ constant_plane(v1->specular[GCOMP], line.sgPlane);
+ constant_plane(v1->specular[BCOMP], line.sbPlane);
+ }
+#endif
+#ifdef DO_INDEX
+ line.span.arrayMask |= SPAN_INDEX;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(line.x0, line.y0, line.x1, line.y1,
+ v0->index, v1->index, line.iPlane);
+ }
+ else {
+ constant_plane(v1->index, line.iPlane);
+ }
+#endif
+#ifdef DO_TEX
+ {
+ const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current;
+ const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel];
+ const GLfloat invW0 = v0->win[3];
+ const GLfloat invW1 = v1->win[3];
+ const GLfloat s0 = v0->texcoord[0][0] * invW0;
+ const GLfloat s1 = v1->texcoord[0][0] * invW1;
+ const GLfloat t0 = v0->texcoord[0][1] * invW0;
+ const GLfloat t1 = v1->texcoord[0][1] * invW1;
+ const GLfloat r0 = v0->texcoord[0][2] * invW0;
+ const GLfloat r1 = v1->texcoord[0][2] * invW1;
+ const GLfloat q0 = v0->texcoord[0][3] * invW0;
+ const GLfloat q1 = v1->texcoord[0][3] * invW1;
+ line.span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, s0, s1, line.sPlane[0]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, t0, t1, line.tPlane[0]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, r0, r1, line.uPlane[0]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, q0, q1, line.vPlane[0]);
+ line.texWidth[0] = (GLfloat) texImage->Width;
+ line.texHeight[0] = (GLfloat) texImage->Height;
+ }
+#elif defined(DO_MULTITEX)
+ {
+ GLuint u;
+ line.span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current;
+ const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel];
+ const GLfloat invW0 = v0->win[3];
+ const GLfloat invW1 = v1->win[3];
+ const GLfloat s0 = v0->texcoord[u][0] * invW0;
+ const GLfloat s1 = v1->texcoord[u][0] * invW1;
+ const GLfloat t0 = v0->texcoord[u][1] * invW0;
+ const GLfloat t1 = v1->texcoord[u][1] * invW1;
+ const GLfloat r0 = v0->texcoord[u][2] * invW0;
+ const GLfloat r1 = v1->texcoord[u][2] * invW1;
+ const GLfloat q0 = v0->texcoord[u][3] * invW0;
+ const GLfloat q1 = v1->texcoord[u][3] * invW1;
+ compute_plane(line.x0, line.y0, line.x1, line.y1, s0, s1, line.sPlane[u]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, t0, t1, line.tPlane[u]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, r0, r1, line.uPlane[u]);
+ compute_plane(line.x0, line.y0, line.x1, line.y1, q0, q1, line.vPlane[u]);
+ line.texWidth[u] = (GLfloat) texImage->Width;
+ line.texHeight[u] = (GLfloat) texImage->Height;
+ }
+ }
+ }
+#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);
+ }
+
+#if defined(DO_RGBA)
+ _swrast_write_rgba_span(ctx, &(line.span));
+#else
+ _swrast_write_index_span(ctx, &(line.span));
+#endif
+}
+
+
+
+
+#undef DO_Z
+#undef DO_FOG
+#undef DO_RGBA
+#undef DO_INDEX
+#undef DO_SPEC
+#undef DO_TEX
+#undef DO_MULTITEX
+#undef NAME
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.c
new file mode 100644
index 000000000..5509f34c9
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.c
@@ -0,0 +1,495 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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 "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "context.h"
+#include "macros.h"
+#include "imports.h"
+#include "nvfragprog.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
+}
+
+
+
+/*
+ * 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);
+}
+
+
+
+/*
+ * Compute how much (area) of the given pixel is inside the triangle.
+ * Vertices MUST be specified in counter-clockwise order.
+ * Return: coverage in [0, 15].
+ */
+static GLint
+compute_coveragei(const GLfloat v0[3], const GLfloat v1[3],
+ const GLfloat v2[3], GLint winx, GLint winy)
+{
+ /* NOTE: 15 samples instead of 16. */
+ static const GLfloat samples[15][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) }
+ };
+ 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;
+ GLint insideCount = 15;
+
+#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];
+ const GLfloat fx0 = sx - v0[0];
+ const GLfloat fy0 = sy - v0[1];
+ const GLfloat fx1 = sx - v1[0];
+ const GLfloat fy1 = sy - v1[1];
+ const GLfloat fx2 = sx - v2[0];
+ const GLfloat fy2 = sy - v2[1];
+ /* cross product determines if sample is inside or outside each edge */
+ GLfloat cross0 = (dx0 * fy0 - dy0 * fx0);
+ GLfloat cross1 = (dx1 * fy1 - dy1 * fx1);
+ GLfloat cross2 = (dx2 * fy2 - dy2 * fx2);
+ /* 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 = dx0 + dy0;
+ if (cross1 == 0.0F)
+ cross1 = dx1 + dy1;
+ if (cross2 == 0.0F)
+ cross2 = dx2 + dy2;
+ if (cross0 < 0.0F || cross1 < 0.0F || cross2 < 0.0F) {
+ /* point is outside triangle */
+ insideCount--;
+ stop = 15;
+ }
+ }
+ if (stop == 4)
+ return 15;
+ else
+ return insideCount;
+}
+
+
+
+static void
+rgba_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#include "s_aatritemp.h"
+}
+
+
+static void
+index_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_INDEX
+#include "s_aatritemp.h"
+}
+
+
+/*
+ * Compute mipmap level of detail.
+ * XXX we should really include the R coordinate in this computation
+ * in order to do 3-D texture mipmapping.
+ */
+static INLINE GLfloat
+compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4],
+ const GLfloat qPlane[4], GLfloat cx, GLfloat cy,
+ GLfloat invQ, GLfloat texWidth, GLfloat texHeight)
+{
+ const GLfloat s = solve_plane(cx, cy, sPlane);
+ const GLfloat t = solve_plane(cx, cy, tPlane);
+ const GLfloat invQ_x1 = solve_plane_recip(cx+1.0F, cy, qPlane);
+ const GLfloat invQ_y1 = solve_plane_recip(cx, cy+1.0F, qPlane);
+ const GLfloat s_x1 = s - sPlane[0] / sPlane[2];
+ const GLfloat s_y1 = s - sPlane[1] / sPlane[2];
+ const GLfloat t_x1 = t - tPlane[0] / tPlane[2];
+ const GLfloat t_y1 = t - tPlane[1] / tPlane[2];
+ GLfloat dsdx = s_x1 * invQ_x1 - s * invQ;
+ GLfloat dsdy = s_y1 * invQ_y1 - s * invQ;
+ GLfloat dtdx = t_x1 * invQ_x1 - t * invQ;
+ GLfloat dtdy = t_y1 * invQ_y1 - t * invQ;
+ GLfloat maxU, maxV, rho, lambda;
+ dsdx = FABSF(dsdx);
+ dsdy = FABSF(dsdy);
+ dtdx = FABSF(dtdx);
+ dtdy = FABSF(dtdy);
+ maxU = MAX2(dsdx, dsdy) * texWidth;
+ maxV = MAX2(dtdx, dtdy) * texHeight;
+ rho = MAX2(maxU, maxV);
+ lambda = LOG2(rho);
+ return lambda;
+}
+
+
+static void
+tex_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_TEX
+#include "s_aatritemp.h"
+}
+
+
+static void
+spec_tex_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_TEX
+#define DO_SPEC
+#include "s_aatritemp.h"
+}
+
+
+static void
+multitex_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_MULTITEX
+#include "s_aatritemp.h"
+}
+
+static void
+spec_multitex_aa_tri(GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2)
+{
+#define DO_Z
+#define DO_FOG
+#define DO_RGBA
+#define DO_MULTITEX
+#define DO_SPEC
+#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)
+{
+ ASSERT(ctx->Polygon.SmoothFlag);
+
+ if (ctx->Texture._EnabledCoordUnits != 0) {
+ if (NEED_SECONDARY_COLOR(ctx)) {
+ if (ctx->Texture._EnabledCoordUnits > 1) {
+ SWRAST_CONTEXT(ctx)->Triangle = spec_multitex_aa_tri;
+ }
+ else {
+ SWRAST_CONTEXT(ctx)->Triangle = spec_tex_aa_tri;
+ }
+ }
+ else {
+ if (ctx->Texture._EnabledCoordUnits > 1) {
+ SWRAST_CONTEXT(ctx)->Triangle = multitex_aa_tri;
+ }
+ else {
+ SWRAST_CONTEXT(ctx)->Triangle = tex_aa_tri;
+ }
+ }
+ }
+ else if (ctx->Visual.rgbMode) {
+ SWRAST_CONTEXT(ctx)->Triangle = rgba_aa_tri;
+ }
+ else {
+ SWRAST_CONTEXT(ctx)->Triangle = index_aa_tri;
+ }
+
+ ASSERT(SWRAST_CONTEXT(ctx)->Triangle);
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.h
new file mode 100644
index 000000000..ebb828eb1
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatriangle.h
@@ -0,0 +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_AATRIANGLE_H
+#define S_AATRIANGLE_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern void
+_swrast_set_aa_triangle_function(GLcontext *ctx);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aatritemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatritemp.h
new file mode 100644
index 000000000..16e26d3f8
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aatritemp.h
@@ -0,0 +1,549 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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_RGBA - if defined, compute RGBA values
+ * DO_INDEX - if defined, compute color index values
+ * DO_SPEC - if defined, compute specular RGB values
+ * DO_TEX - if defined, compute unit 0 STRQ texcoords
+ * DO_MULTITEX - if defined, compute all unit's STRQ texcoords
+ */
+
+/*void triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/
+{
+ const GLfloat *p0 = v0->win;
+ const GLfloat *p1 = v1->win;
+ const GLfloat *p2 = v2->win;
+ const SWvertex *vMin, *vMid, *vMax;
+ GLint iyMin, iyMax;
+ GLfloat yMin, yMax;
+ GLboolean ltor;
+ GLfloat majDx, majDy; /* major (i.e. long) edge dx and dy */
+
+ struct sw_span span;
+
+#ifdef DO_Z
+ GLfloat zPlane[4];
+#endif
+#ifdef DO_FOG
+ GLfloat fogPlane[4];
+#else
+ GLfloat *fog = NULL;
+#endif
+#ifdef DO_RGBA
+ GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
+#endif
+#ifdef DO_INDEX
+ GLfloat iPlane[4];
+#endif
+#ifdef DO_SPEC
+ GLfloat srPlane[4], sgPlane[4], sbPlane[4];
+#endif
+#ifdef DO_TEX
+ GLfloat sPlane[4], tPlane[4], uPlane[4], vPlane[4];
+ GLfloat texWidth, texHeight;
+#elif defined(DO_MULTITEX)
+ GLfloat sPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture S */
+ GLfloat tPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture T */
+ GLfloat uPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture R */
+ GLfloat vPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture Q */
+ GLfloat texWidth[MAX_TEXTURE_COORD_UNITS];
+ GLfloat texHeight[MAX_TEXTURE_COORD_UNITS];
+#endif
+ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign;
+
+
+ INIT_SPAN(span, GL_POLYGON, 0, 0, SPAN_COVERAGE);
+
+ /* determine bottom to top order of vertices */
+ {
+ GLfloat y0 = v0->win[1];
+ GLfloat y1 = v1->win[1];
+ GLfloat y2 = v2->win[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->win[0] - vMin->win[0];
+ majDy = vMax->win[1] - vMin->win[1];
+
+ {
+ const GLfloat botDx = vMid->win[0] - vMin->win[0];
+ const GLfloat botDy = vMid->win[1] - vMin->win[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);
+ }
+
+#ifndef DO_OCCLUSION_TEST
+ ctx->OcclusionResult = GL_TRUE;
+#endif
+
+ /* 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
+#ifdef DO_FOG
+ compute_plane(p0, p1, p2, v0->fog, v1->fog, v2->fog, fogPlane);
+ span.arrayMask |= SPAN_FOG;
+#endif
+#ifdef DO_RGBA
+ 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;
+#endif
+#ifdef DO_INDEX
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(p0, p1, p2, (GLfloat) v0->index,
+ v1->index, v2->index, iPlane);
+ }
+ else {
+ constant_plane(v2->index, iPlane);
+ }
+ span.arrayMask |= SPAN_INDEX;
+#endif
+#ifdef DO_SPEC
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ compute_plane(p0, p1, p2, v0->specular[RCOMP], v1->specular[RCOMP], v2->specular[RCOMP], srPlane);
+ compute_plane(p0, p1, p2, v0->specular[GCOMP], v1->specular[GCOMP], v2->specular[GCOMP], sgPlane);
+ compute_plane(p0, p1, p2, v0->specular[BCOMP], v1->specular[BCOMP], v2->specular[BCOMP], sbPlane);
+ }
+ else {
+ constant_plane(v2->specular[RCOMP], srPlane);
+ constant_plane(v2->specular[GCOMP], sgPlane);
+ constant_plane(v2->specular[BCOMP], sbPlane);
+ }
+ span.arrayMask |= SPAN_SPEC;
+#endif
+#ifdef DO_TEX
+ {
+ const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current;
+ const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel];
+ const GLfloat invW0 = v0->win[3];
+ const GLfloat invW1 = v1->win[3];
+ const GLfloat invW2 = v2->win[3];
+ const GLfloat s0 = v0->texcoord[0][0] * invW0;
+ const GLfloat s1 = v1->texcoord[0][0] * invW1;
+ const GLfloat s2 = v2->texcoord[0][0] * invW2;
+ const GLfloat t0 = v0->texcoord[0][1] * invW0;
+ const GLfloat t1 = v1->texcoord[0][1] * invW1;
+ const GLfloat t2 = v2->texcoord[0][1] * invW2;
+ const GLfloat r0 = v0->texcoord[0][2] * invW0;
+ const GLfloat r1 = v1->texcoord[0][2] * invW1;
+ const GLfloat r2 = v2->texcoord[0][2] * invW2;
+ const GLfloat q0 = v0->texcoord[0][3] * invW0;
+ const GLfloat q1 = v1->texcoord[0][3] * invW1;
+ const GLfloat q2 = v2->texcoord[0][3] * invW2;
+ compute_plane(p0, p1, p2, s0, s1, s2, sPlane);
+ compute_plane(p0, p1, p2, t0, t1, t2, tPlane);
+ compute_plane(p0, p1, p2, r0, r1, r2, uPlane);
+ compute_plane(p0, p1, p2, q0, q1, q2, vPlane);
+ texWidth = (GLfloat) texImage->Width;
+ texHeight = (GLfloat) texImage->Height;
+ }
+ span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
+#elif defined(DO_MULTITEX)
+ {
+ GLuint u;
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current;
+ const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel];
+ const GLfloat invW0 = v0->win[3];
+ const GLfloat invW1 = v1->win[3];
+ const GLfloat invW2 = v2->win[3];
+ const GLfloat s0 = v0->texcoord[u][0] * invW0;
+ const GLfloat s1 = v1->texcoord[u][0] * invW1;
+ const GLfloat s2 = v2->texcoord[u][0] * invW2;
+ const GLfloat t0 = v0->texcoord[u][1] * invW0;
+ const GLfloat t1 = v1->texcoord[u][1] * invW1;
+ const GLfloat t2 = v2->texcoord[u][1] * invW2;
+ const GLfloat r0 = v0->texcoord[u][2] * invW0;
+ const GLfloat r1 = v1->texcoord[u][2] * invW1;
+ const GLfloat r2 = v2->texcoord[u][2] * invW2;
+ const GLfloat q0 = v0->texcoord[u][3] * invW0;
+ const GLfloat q1 = v1->texcoord[u][3] * invW1;
+ const GLfloat q2 = v2->texcoord[u][3] * invW2;
+ compute_plane(p0, p1, p2, s0, s1, s2, sPlane[u]);
+ compute_plane(p0, p1, p2, t0, t1, t2, tPlane[u]);
+ compute_plane(p0, p1, p2, r0, r1, r2, uPlane[u]);
+ compute_plane(p0, p1, p2, q0, q1, q2, vPlane[u]);
+ texWidth[u] = (GLfloat) texImage->Width;
+ texHeight[u] = (GLfloat) texImage->Height;
+ }
+ }
+ }
+ span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
+#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->win[1];
+ yMax = vMax->win[1];
+ iyMin = (GLint) yMin;
+ iyMax = (GLint) yMax + 1;
+
+ if (ltor) {
+ /* scan left to right */
+ const GLfloat *pMin = vMin->win;
+ const GLfloat *pMid = vMid->win;
+ const GLfloat *pMax = vMax->win;
+ 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;
+ count = 0;
+ while (coverage > 0.0F) {
+ /* (cx,cy) = center of fragment */
+ const GLfloat cx = ix + 0.5F, cy = iy + 0.5F;
+ struct span_arrays *array = span.array;
+#ifdef DO_INDEX
+ array->coverage[count] = (GLfloat) compute_coveragei(pMin, pMid, pMax, ix, iy);
+#else
+ array->coverage[count] = coverage;
+#endif
+#ifdef DO_Z
+ array->z[count] = (GLdepth) IROUND(solve_plane(cx, cy, zPlane));
+#endif
+#ifdef DO_FOG
+ array->fog[count] = solve_plane(cx, cy, fogPlane);
+#endif
+#ifdef DO_RGBA
+ 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);
+#endif
+#ifdef DO_INDEX
+ array->index[count] = (GLint) solve_plane(cx, cy, iPlane);
+#endif
+#ifdef DO_SPEC
+ array->spec[count][RCOMP] = solve_plane_chan(cx, cy, srPlane);
+ array->spec[count][GCOMP] = solve_plane_chan(cx, cy, sgPlane);
+ array->spec[count][BCOMP] = solve_plane_chan(cx, cy, sbPlane);
+#endif
+#ifdef DO_TEX
+ {
+ const GLfloat invQ = solve_plane_recip(cx, cy, vPlane);
+ array->texcoords[0][count][0] = solve_plane(cx, cy, sPlane) * invQ;
+ array->texcoords[0][count][1] = solve_plane(cx, cy, tPlane) * invQ;
+ array->texcoords[0][count][2] = solve_plane(cx, cy, uPlane) * invQ;
+ array->lambda[0][count] = compute_lambda(sPlane, tPlane, vPlane,
+ cx, cy, invQ,
+ texWidth, texHeight);
+ }
+#elif defined(DO_MULTITEX)
+ {
+ GLuint unit;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ GLfloat invQ = solve_plane_recip(cx, cy, vPlane[unit]);
+ array->texcoords[unit][count][0] = solve_plane(cx, cy, sPlane[unit]) * invQ;
+ array->texcoords[unit][count][1] = solve_plane(cx, cy, tPlane[unit]) * invQ;
+ array->texcoords[unit][count][2] = solve_plane(cx, cy, uPlane[unit]) * invQ;
+ array->lambda[unit][count] = compute_lambda(sPlane[unit],
+ tPlane[unit], vPlane[unit], cx, cy, invQ,
+ texWidth[unit], texHeight[unit]);
+ }
+ }
+ }
+#endif
+ 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;
+ ASSERT(span.interpMask == 0);
+#if defined(DO_RGBA)
+ _swrast_write_rgba_span(ctx, &span);
+#else
+ _swrast_write_index_span(ctx, &span);
+#endif
+ }
+ }
+ else {
+ /* scan right to left */
+ const GLfloat *pMin = vMin->win;
+ const GLfloat *pMid = vMid->win;
+ const GLfloat *pMax = vMax->win;
+ 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;
+ struct span_arrays *array = span.array;
+#ifdef DO_INDEX
+ array->coverage[ix] = (GLfloat) compute_coveragei(pMin, pMax, pMid, ix, iy);
+#else
+ array->coverage[ix] = coverage;
+#endif
+#ifdef DO_Z
+ array->z[ix] = (GLdepth) IROUND(solve_plane(cx, cy, zPlane));
+#endif
+#ifdef DO_FOG
+ array->fog[ix] = solve_plane(cx, cy, fogPlane);
+#endif
+#ifdef DO_RGBA
+ 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);
+#endif
+#ifdef DO_INDEX
+ array->index[ix] = (GLint) solve_plane(cx, cy, iPlane);
+#endif
+#ifdef DO_SPEC
+ array->spec[ix][RCOMP] = solve_plane_chan(cx, cy, srPlane);
+ array->spec[ix][GCOMP] = solve_plane_chan(cx, cy, sgPlane);
+ array->spec[ix][BCOMP] = solve_plane_chan(cx, cy, sbPlane);
+#endif
+#ifdef DO_TEX
+ {
+ const GLfloat invQ = solve_plane_recip(cx, cy, vPlane);
+ array->texcoords[0][ix][0] = solve_plane(cx, cy, sPlane) * invQ;
+ array->texcoords[0][ix][1] = solve_plane(cx, cy, tPlane) * invQ;
+ array->texcoords[0][ix][2] = solve_plane(cx, cy, uPlane) * invQ;
+ array->lambda[0][ix] = compute_lambda(sPlane, tPlane, vPlane,
+ cx, cy, invQ, texWidth, texHeight);
+ }
+#elif defined(DO_MULTITEX)
+ {
+ GLuint unit;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ GLfloat invQ = solve_plane_recip(cx, cy, vPlane[unit]);
+ array->texcoords[unit][ix][0] = solve_plane(cx, cy, sPlane[unit]) * invQ;
+ array->texcoords[unit][ix][1] = solve_plane(cx, cy, tPlane[unit]) * invQ;
+ array->texcoords[unit][ix][2] = solve_plane(cx, cy, uPlane[unit]) * invQ;
+ array->lambda[unit][ix] = compute_lambda(sPlane[unit],
+ tPlane[unit],
+ vPlane[unit],
+ cx, cy, invQ,
+ texWidth[unit],
+ texHeight[unit]);
+ }
+ }
+ }
+#endif
+ ix--;
+ count++;
+ coverage = compute_coveragef(pMin, pMax, pMid, ix, iy);
+ }
+
+ if (startX <= ix)
+ continue;
+
+ n = (GLuint) startX - (GLuint) ix;
+
+ left = ix + 1;
+
+ /* shift all values to the left */
+ /* XXX this is temporary */
+ {
+ struct span_arrays *array = span.array;
+ GLint j;
+ for (j = 0; j < (GLint) n; j++) {
+#ifdef DO_RGBA
+ COPY_CHAN4(array->rgba[j], array->rgba[j + left]);
+#endif
+#ifdef DO_SPEC
+ COPY_CHAN4(array->spec[j], array->spec[j + left]);
+#endif
+#ifdef DO_INDEX
+ array->index[j] = array->index[j + left];
+#endif
+#ifdef DO_Z
+ array->z[j] = array->z[j + left];
+#endif
+#ifdef DO_FOG
+ array->fog[j] = array->fog[j + left];
+#endif
+#ifdef DO_TEX
+ COPY_4V(array->texcoords[0][j], array->texcoords[0][j + left]);
+#endif
+#if defined(DO_MULTITEX) || defined(DO_TEX)
+ array->lambda[0][j] = array->lambda[0][j + left];
+#endif
+ array->coverage[j] = array->coverage[j + left];
+ }
+ }
+#ifdef DO_MULTITEX
+ /* shift texcoords */
+ {
+ struct span_arrays *array = span.array;
+ GLuint unit;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ GLint j;
+ for (j = 0; j < (GLint) n; j++) {
+ array->texcoords[unit][j][0] = array->texcoords[unit][j + left][0];
+ array->texcoords[unit][j][1] = array->texcoords[unit][j + left][1];
+ array->texcoords[unit][j][2] = array->texcoords[unit][j + left][2];
+ array->lambda[unit][j] = array->lambda[unit][j + left];
+ }
+ }
+ }
+ }
+#endif
+
+ span.x = left;
+ span.y = iy;
+ span.end = n;
+ ASSERT(span.interpMask == 0);
+#if defined(DO_RGBA)
+ _swrast_write_rgba_span(ctx, &span);
+#else
+ _swrast_write_index_span(ctx, &span);
+#endif
+ }
+ }
+}
+
+
+#ifdef DO_Z
+#undef DO_Z
+#endif
+
+#ifdef DO_FOG
+#undef DO_FOG
+#endif
+
+#ifdef DO_RGBA
+#undef DO_RGBA
+#endif
+
+#ifdef DO_INDEX
+#undef DO_INDEX
+#endif
+
+#ifdef DO_SPEC
+#undef DO_SPEC
+#endif
+
+#ifdef DO_TEX
+#undef DO_TEX
+#endif
+
+#ifdef DO_MULTITEX
+#undef DO_MULTITEX
+#endif
+
+#ifdef DO_OCCLUSION_TEST
+#undef DO_OCCLUSION_TEST
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c
new file mode 100644
index 000000000..5621d0c8a
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c
@@ -0,0 +1,584 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "imports.h"
+#include "fbobject.h"
+
+#include "s_accum.h"
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+#define ACCUM_SCALE16 32767.0
+
+
+/*
+ * 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 && ACCUM_BITS <= 32
+/* 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;
+
+ if (ctx->Visual.accumRedBits == 0) {
+ /* No accumulation buffer! Not an error. */
+ return;
+ }
+
+ assert(rb);
+ 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);
+
+ _swrast_use_read_buffer(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, 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 */
+ }
+
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+
+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;
+ }
+
+ _swrast_use_read_buffer(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, 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);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+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);
+ const GLboolean masking = (!ctx->Color.ColorMask[RCOMP] ||
+ !ctx->Color.ColorMask[GCOMP] ||
+ !ctx->Color.ColorMask[BCOMP] ||
+ !ctx->Color.ColorMask[ACOMP]);
+
+ 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, i;
+
+ /* XXX maybe transpose the 'i' and 'buffer' loops??? */
+ for (i = 0; i < height; i++) {
+ GLchan rgba[MAX_WIDTH][4];
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLshort *acc;
+
+ 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);
+ rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
+ rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
+ rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
+ rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ 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 );
+ rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
+ rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
+ rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
+ rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
+ }
+ }
+
+ /* store colors */
+ for (buffer = 0; buffer < fb->_NumColorDrawBuffers[0]; buffer++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[0][buffer];
+ if (masking) {
+ _swrast_mask_rgba_array(ctx, rb, width, xpos, ypos + i, rgba);
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, rgba, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+/**
+ * Software fallback for glAccum.
+ */
+void
+_swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
+ GLint xpos, GLint ypos,
+ GLint width, GLint height )
+
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
+ return;
+ }
+
+ RENDER_START(swrast, ctx);
+
+ 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;
+ }
+
+ RENDER_FINISH(swrast, ctx);
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.h
new file mode 100644
index 000000000..97d2bef4c
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.h
@@ -0,0 +1,37 @@
+/*
+ * 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 "mtypes.h"
+
+
+extern void
+_swrast_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c
new file mode 100644
index 000000000..55c1e6a58
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c
@@ -0,0 +1,224 @@
+
+/*
+ * 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.
+ */
+
+/**
+ * \file swrast/s_alpha.c
+ * \brief Functions to apply alpha test.
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "macros.h"
+
+#include "s_alpha.h"
+#include "s_context.h"
+
+
+/**
+ * \fn GLint _swrast_alpha_test( const GLcontext *ctx, struct sw_span *span )
+ * \brief Apply the alpha test to a span of pixels.
+ * \return
+ * - "0" = all pixels in the span failed the alpha test.
+ * - "1" = one or more pixels passed the alpha test.
+ */
+GLint
+_swrast_alpha_test( const GLcontext *ctx, struct sw_span *span )
+{
+ const GLchan (*rgba)[4] = (const GLchan (*)[4]) span->array->rgba;
+ GLchan ref;
+ const GLuint n = span->end;
+ GLubyte *mask = span->array->mask;
+ GLuint i;
+
+ CLAMPED_FLOAT_TO_CHAN(ref, ctx->Color.AlphaRef);
+
+ if (span->arrayMask & SPAN_RGBA) {
+ /* Use the array values */
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] < ref);
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] <= ref);
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] >= ref);
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] > ref);
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] != ref);
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] == ref);
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in _swrast_alpha_test" );
+ return 0;
+ }
+ }
+ else {
+ /* Use the interpolation values */
+#if CHAN_TYPE == GL_FLOAT
+ const GLfloat alphaStep = span->alphaStep;
+ GLfloat alpha = span->alpha;
+ ASSERT(span->interpMask & SPAN_RGBA);
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha < ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha <= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha >= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha > ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha != ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha == ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
+ return 0;
+ }
+#else
+ /* 8 or 16-bit channel interpolation */
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ ASSERT(span->interpMask & SPAN_RGBA);
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) < ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) <= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) >= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) > ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) != ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) == ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
+ return 0;
+ }
+#endif /* CHAN_TYPE */
+ }
+
+#if 0
+ /* XXXX This causes conformance failures!!!! */
+ while ((span->start <= span->end) &&
+ (mask[span->start] == 0))
+ span->start ++;
+
+ while ((span->end >= span->start) &&
+ (mask[span->end] == 0))
+ span->end --;
+#endif
+
+ span->writeAll = GL_FALSE;
+
+ if (span->start >= span->end)
+ return 0;
+ else
+ return 1;
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.h
new file mode 100644
index 000000000..add0f74c4
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.h
@@ -0,0 +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 "mtypes.h"
+#include "s_context.h"
+
+
+extern GLint
+_swrast_alpha_test( const GLcontext *ctx, struct sw_span *span );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.c
new file mode 100644
index 000000000..d137b17d2
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.c
@@ -0,0 +1,625 @@
+/*
+ *
+ * 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 "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "atifragshader.h"
+#include "macros.h"
+#include "program.h"
+
+#include "s_atifragshader.h"
+#include "s_nvfragprog.h"
+#include "s_span.h"
+#include "s_texture.h"
+
+/**
+ * Fetch a texel.
+ */
+static void
+fetch_texel(GLcontext * ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4])
+{
+ GLchan rgba[4];
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* XXX use a float-valued TextureSample routine here!!! */
+ swrast->TextureSample[unit] (ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat(*)[4]) texcoord,
+ &lambda, &rgba);
+ color[0] = CHAN_TO_FLOAT(rgba[0]);
+ color[1] = CHAN_TO_FLOAT(rgba[1]);
+ color[2] = CHAN_TO_FLOAT(rgba[2]);
+ color[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+static void
+apply_swizzle(struct atifs_machine *machine, GLuint reg, GLuint swizzle)
+{
+ GLfloat s, t, r, q;
+
+ s = machine->Registers[reg][0];
+ t = machine->Registers[reg][1];
+ r = machine->Registers[reg][2];
+ q = machine->Registers[reg][3];
+
+ switch (swizzle) {
+ case GL_SWIZZLE_STR_ATI:
+ machine->Registers[reg][0] = s;
+ machine->Registers[reg][1] = t;
+ machine->Registers[reg][2] = r;
+ break;
+ case GL_SWIZZLE_STQ_ATI:
+ machine->Registers[reg][0] = s;
+ machine->Registers[reg][1] = t;
+ machine->Registers[reg][2] = q;
+ break;
+ case GL_SWIZZLE_STR_DR_ATI:
+ machine->Registers[reg][0] = s / r;
+ machine->Registers[reg][1] = t / r;
+ machine->Registers[reg][2] = 1 / r;
+ break;
+ case GL_SWIZZLE_STQ_DQ_ATI:
+ machine->Registers[reg][0] = s / q;
+ machine->Registers[reg][1] = t / q;
+ machine->Registers[reg][2] = 1 / q;
+ break;
+ }
+ machine->Registers[reg][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 = optype ? 4 : 3;
+
+ 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 = optype ? 4 : 3;
+
+ 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] - 0.5;
+
+ 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] * 0.5;
+ break;
+ case GL_QUARTER_BIT_ATI:
+ val[i] = val[i] * 0.25;
+ break;
+ case GL_EIGHTH_BIT_ATI:
+ val[i] = val[i] * 0.125;
+ break;
+ }
+
+ if (has_sat) {
+ if (val[i] < 0.0)
+ val[i] = 0;
+ else if (val[i] > 1.0)
+ val[i] = 1.0;
+ }
+ else {
+ if (val[i] < -8.0)
+ val[i] = -8.0;
+ else if (val[i] > 8.0)
+ val[i] = 8.0;
+ }
+ }
+}
+
+
+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]);
+ }
+}
+
+/**
+ * Execute the given fragment shader
+ * NOTE: we do everything in single-precision floating point; we don't
+ * currently observe the single/half/fixed-precision qualifiers.
+ * \param ctx - rendering context
+ * \param program - the fragment program to execute
+ * \param machine - machine state (register file)
+ * \param maxInst - max number of instructions to execute
+ * \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
+ */
+
+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_instruction *inst,
+ const struct sw_span *span, GLuint column)
+{
+ GLuint idx = inst->DstReg[0].Index - GL_REG_0_ATI;
+ GLuint swizzle = inst->DstReg[0].Swizzle;
+ GLuint pass_tex = inst->SrcReg[0][0].Index;
+
+ /* if we get here after passing pass one then we are starting pass two - backup the registers */
+ if (machine->pass == 1) {
+ finish_pass(machine);
+ machine->pass = 2;
+ }
+ if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
+ pass_tex -= GL_TEXTURE0_ARB;
+ COPY_4V(machine->Registers[idx],
+ span->array->texcoords[pass_tex][column]);
+ }
+ else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI
+ && machine->pass == 2) {
+ pass_tex -= GL_REG_0_ATI;
+ COPY_4V(machine->Registers[idx], machine->PrevPassRegisters[pass_tex]);
+ }
+ apply_swizzle(machine, idx, swizzle);
+
+}
+
+static void
+handle_sample_op(GLcontext * ctx, struct atifs_machine *machine,
+ struct atifs_instruction *inst, const struct sw_span *span,
+ GLuint column)
+{
+ GLuint idx = inst->DstReg[0].Index - GL_REG_0_ATI;
+ GLuint swizzle = inst->DstReg[0].Swizzle;
+ GLuint sample_tex = inst->SrcReg[0][0].Index;
+
+ /* if we get here after passing pass one then we are starting pass two - backup the registers */
+ if (machine->pass == 1) {
+ finish_pass(machine);
+ machine->pass = 2;
+ }
+
+ if (sample_tex >= GL_TEXTURE0_ARB && sample_tex <= GL_TEXTURE7_ARB) {
+ sample_tex -= GL_TEXTURE0_ARB;
+ fetch_texel(ctx, span->array->texcoords[sample_tex][column], 0.0F,
+ sample_tex, machine->Registers[idx]);
+ }
+ else if (sample_tex >= GL_REG_0_ATI && sample_tex <= GL_REG_5_ATI) {
+ /* this is wrong... */
+ sample_tex -= GL_REG_0_ATI;
+ fetch_texel(ctx, machine->Registers[sample_tex], 0, sample_tex,
+ machine->Registers[idx]);
+ }
+
+ apply_swizzle(machine, idx, swizzle);
+}
+
+#define SETUP_SRC_REG(optype, i, x) do { \
+ if (optype) \
+ src[optype][i][3] = x[3]; \
+ else \
+ COPY_3V(src[optype][i], x); \
+ } while (0)
+
+static GLboolean
+execute_shader(GLcontext * ctx,
+ const struct ati_fragment_shader *shader, GLuint maxInst,
+ struct atifs_machine *machine, const struct sw_span *span,
+ GLuint column)
+{
+ GLuint pc;
+ struct atifs_instruction *inst;
+ GLint optype;
+ GLint i;
+ 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 (pc = 0; pc < shader->Base.NumInstructions; pc++) {
+ inst = &shader->Instructions[pc];
+
+ if (inst->Opcode[0] == ATI_FRAGMENT_SHADER_PASS_OP)
+ handle_pass_op(machine, inst, span, column);
+ else if (inst->Opcode[0] == ATI_FRAGMENT_SHADER_SAMPLE_OP)
+ handle_sample_op(ctx, machine, inst, span, column);
+ else {
+ if (machine->pass == 0)
+ machine->pass = 1;
+
+ /* 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)
+ SETUP_SRC_REG(optype, i,
+ shader->Constants[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 */
+ 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[optype][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];
+
+ write_dst_addr(optype, inst->DstReg[optype].dstMod,
+ inst->DstReg[optype].dstMask, dst[optype],
+ dstp);
+ }
+ }
+ }
+ }
+ return GL_TRUE;
+}
+
+static void
+init_machine(GLcontext * ctx, struct atifs_machine *machine,
+ const struct ati_fragment_shader *shader,
+ const struct sw_span *span, GLuint col)
+{
+ GLint i, j;
+
+ for (i = 0; i < 6; i++) {
+ for (j = 0; j < 4; j++)
+ ctx->ATIFragmentShader.Machine.Registers[i][j] = 0.0;
+
+ }
+
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][0] =
+ CHAN_TO_FLOAT(span->array->rgba[col][0]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][1] =
+ CHAN_TO_FLOAT(span->array->rgba[col][1]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][2] =
+ CHAN_TO_FLOAT(span->array->rgba[col][2]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][3] =
+ CHAN_TO_FLOAT(span->array->rgba[col][3]);
+
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][0] =
+ CHAN_TO_FLOAT(span->array->spec[col][0]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][1] =
+ CHAN_TO_FLOAT(span->array->spec[col][1]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][2] =
+ CHAN_TO_FLOAT(span->array->spec[col][2]);
+ ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][3] =
+ CHAN_TO_FLOAT(span->array->spec[col][3]);
+
+ ctx->ATIFragmentShader.Machine.pass = 0;
+}
+
+
+
+/**
+ * Execute the current fragment program, operating on the given span.
+ */
+void
+_swrast_exec_fragment_shader(GLcontext * ctx, struct sw_span *span)
+{
+ const struct ati_fragment_shader *shader = ctx->ATIFragmentShader.Current;
+ GLuint i;
+
+ ctx->_CurrentProgram = GL_FRAGMENT_SHADER_ATI;
+
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ init_machine(ctx, &ctx->ATIFragmentShader.Machine,
+ ctx->ATIFragmentShader.Current, span, i);
+
+ if (execute_shader(ctx, shader, ~0,
+ &ctx->ATIFragmentShader.Machine, span, i)) {
+ span->array->mask[i] = GL_FALSE;
+ }
+
+ {
+ const GLfloat *colOut =
+ ctx->ATIFragmentShader.Machine.Registers[0];
+
+ /*fprintf(stderr,"outputs %f %f %f %f\n", colOut[0], colOut[1], colOut[2], colOut[3]); */
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][RCOMP], colOut[0]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][GCOMP], colOut[1]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][BCOMP], colOut[2]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][ACOMP], colOut[3]);
+ }
+ }
+
+ }
+
+
+ ctx->_CurrentProgram = 0;
+
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.h
new file mode 100644
index 000000000..269be1f2e
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_atifragshader.h
@@ -0,0 +1,37 @@
+/*
+ * 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_context.h"
+
+
+extern void
+_swrast_exec_fragment_shader( GLcontext *ctx, struct sw_span *span );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_bitmap.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_bitmap.c
new file mode 100644
index 000000000..dd5008cf6
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_bitmap.c
@@ -0,0 +1,282 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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 "glheader.h"
+#include "bufferobj.h"
+#include "image.h"
+#include "macros.h"
+#include "pixel.h"
+
+#include "s_context.h"
+#include "s_span.h"
+
+
+
+/*
+ * Render a bitmap.
+ */
+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;
+ GLuint count = 0;
+ struct sw_span span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+
+ if (unpack->BufferObj->Name) {
+ /* unpack from PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
+ GL_COLOR_INDEX, GL_BITMAP,
+ (GLvoid *) bitmap)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ GL_READ_ONLY_ARB,
+ unpack->BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
+ return;
+ }
+ bitmap = ADD_POINTERS(buf, bitmap);
+ }
+
+ RENDER_START(swrast,ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_XY);
+
+ if (ctx->Visual.rgbMode) {
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
+ }
+ else {
+ span.interpMask |= SPAN_INDEX;
+ span.index = FloatToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
+ }
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(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;
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_span(ctx, &span);
+ span.end = 0;
+ count = 0;
+ }
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ if (unpack->BufferObj->Name) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ unpack->BufferObj);
+ }
+}
+
+
+#if 0
+/*
+ * XXX this is another way to implement Bitmap. Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragmens 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;
+ struct sw_span span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+ ASSERT(bitmap);
+
+ RENDER_START(swrast,ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_MASK);
+
+ /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
+ span.x = px;
+ span.y = py;
+ /*span.end = width;*/
+ if (ctx->Visual.rgbMode) {
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
+ }
+ else {
+ span.interpMask |= SPAN_INDEX;
+ span.index = FloatToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
+ }
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ 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;
+ }
+ }
+
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_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;
+ }
+ }
+
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.c
new file mode 100644
index 000000000..d94ff3923
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.c
@@ -0,0 +1,872 @@
+/*
+ * 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.
+ */
+
+/*
+ * Regarding GL_NV_blend_square:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "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
+
+
+/*
+ * Special case for glBlendFunc(GL_ZERO, GL_ONE)
+ */
+static void _BLENDAPI
+blend_noop( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ GLuint i;
+ 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;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ COPY_CHAN4( rgba[i], dest[i] );
+ }
+ }
+}
+
+
+/*
+ * Special case for glBlendFunc(GL_ONE, GL_ZERO)
+ */
+static void _BLENDAPI
+blend_replace( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ 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) rgba;
+ (void) dest;
+}
+
+
+/*
+ * Common transparency blending mode.
+ */
+static void _BLENDAPI
+blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ 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.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA);
+ (void) ctx;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ const GLchan t = rgba[i][ACOMP]; /* t in [0, CHAN_MAX] */
+ if (t == 0) {
+ /* 0% alpha */
+ rgba[i][RCOMP] = dest[i][RCOMP];
+ rgba[i][GCOMP] = dest[i][GCOMP];
+ rgba[i][BCOMP] = dest[i][BCOMP];
+ rgba[i][ACOMP] = dest[i][ACOMP];
+ }
+ else if (t == CHAN_MAX) {
+ /* 100% alpha, no-op */
+ }
+ else {
+#if 0
+ /* This is pretty close, but Glean complains */
+ const GLint s = CHAN_MAX - t;
+ const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s + 1) >> 8;
+ const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s + 1) >> 8;
+ const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s + 1) >> 8;
+ const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s + 1) >> 8;
+#elif 0
+ /* This is slower but satisfies Glean */
+ const GLint s = CHAN_MAX - t;
+ const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s) / 255;
+ const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s) / 255;
+ const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) / 255;
+ const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) / 255;
+#else
+#if CHAN_BITS == 8
+ /* This satisfies Glean and should be reasonably fast */
+ /* Contributed by Nathan Hand */
+#if 0
+#define DIV255(X) (((X) << 8) + (X) + 256) >> 16
+#else
+ GLint temp;
+#define DIV255(X) (temp = (X), ((temp << 8) + temp + 256) >> 16)
+#endif
+ 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];
+
+#undef DIV255
+#elif CHAN_BITS == 16
+ const GLfloat tt = (GLfloat) t / CHAN_MAXF;
+ const GLint r = (GLint) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);
+ const GLint g = (GLint) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);
+ const GLint b = (GLint) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);
+ const GLint a = (GLint) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);
+#else /* CHAN_BITS == 32 */
+ const GLfloat tt = (GLfloat) t / CHAN_MAXF;
+ const GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP];
+ const GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP];
+ const GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP];
+ const GLfloat a = CLAMP( rgba[i][ACOMP], 0.0F, CHAN_MAXF ) * t +
+ CLAMP( dest[i][ACOMP], 0.0F, CHAN_MAXF ) * (1.0F - t);
+#endif
+#endif
+ ASSERT(r <= CHAN_MAX);
+ ASSERT(g <= CHAN_MAX);
+ ASSERT(b <= CHAN_MAX);
+ ASSERT(a <= CHAN_MAX);
+ rgba[i][RCOMP] = (GLchan) r;
+ rgba[i][GCOMP] = (GLchan) g;
+ rgba[i][BCOMP] = (GLchan) b;
+ rgba[i][ACOMP] = (GLchan) a;
+ }
+ }
+ }
+}
+
+
+
+/*
+ * Add src and dest.
+ */
+static void _BLENDAPI
+blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ 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;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+#if CHAN_TYPE == GL_FLOAT
+ /* don't RGB clamp to max */
+ GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF) + dest[i][ACOMP];
+ rgba[i][RCOMP] += dest[i][RCOMP];
+ rgba[i][GCOMP] += dest[i][GCOMP];
+ rgba[i][BCOMP] += dest[i][BCOMP];
+ rgba[i][ACOMP] = (GLchan) MIN2( a, CHAN_MAXF );
+#else
+ 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] = (GLchan) MIN2( r, CHAN_MAX );
+ rgba[i][GCOMP] = (GLchan) MIN2( g, CHAN_MAX );
+ rgba[i][BCOMP] = (GLchan) MIN2( b, CHAN_MAX );
+ rgba[i][ACOMP] = (GLchan) MIN2( a, CHAN_MAX );
+#endif
+ }
+ }
+}
+
+
+
+/*
+ * Blend min function (for GL_EXT_blend_minmax)
+ */
+static void _BLENDAPI
+blend_min( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ GLuint i;
+ ASSERT(ctx->Color.BlendEquationRGB==GL_MIN);
+ ASSERT(ctx->Color.BlendEquationA==GL_MIN);
+ (void) ctx;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = (GLchan) MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = (GLchan) MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = (GLchan) MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (GLchan) MIN2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF),
+ dest[i][ACOMP]);
+#else
+ rgba[i][ACOMP] = (GLchan) MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+#endif
+ }
+ }
+}
+
+
+
+/*
+ * Blend max function (for GL_EXT_blend_minmax)
+ */
+static void _BLENDAPI
+blend_max( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ GLuint i;
+ ASSERT(ctx->Color.BlendEquationRGB==GL_MAX);
+ ASSERT(ctx->Color.BlendEquationA==GL_MAX);
+ (void) ctx;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = (GLchan) MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = (GLchan) MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = (GLchan) MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (GLchan) MAX2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF),
+ dest[i][ACOMP]);
+#else
+ rgba[i][ACOMP] = (GLchan) MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+#endif
+ }
+ }
+}
+
+
+
+/*
+ * Modulate: result = src * dest
+ */
+static void _BLENDAPI
+blend_modulate( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ GLuint i;
+ (void) ctx;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+#if CHAN_TYPE == GL_FLOAT
+ 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];
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;
+ GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;
+ GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;
+ GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;
+ rgba[i][RCOMP] = (GLchan) r;
+ rgba[i][GCOMP] = (GLchan) g;
+ rgba[i][BCOMP] = (GLchan) b;
+ rgba[i][ACOMP] = (GLchan) a;
+#else
+ GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 255) >> 8;
+ GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 255) >> 8;
+ GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 255) >> 8;
+ GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 255) >> 8;
+ rgba[i][RCOMP] = (GLchan) r;
+ rgba[i][GCOMP] = (GLchan) g;
+ rgba[i][BCOMP] = (GLchan) b;
+ rgba[i][ACOMP] = (GLchan) a;
+#endif
+ }
+ }
+}
+
+
+
+/*
+ * General case blend pixels.
+ * Input: n - number of pixels
+ * mask - the usual write mask
+ * In/Out: rgba - the incoming and modified pixels
+ * Input: dest - the pixels from the dest color buffer
+ */
+static void _BLENDAPI
+blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
+ GLchan rgba[][4], CONST GLchan dest[][4] )
+{
+ const GLfloat rscale = 1.0F / CHAN_MAXF;
+ const GLfloat gscale = 1.0F / CHAN_MAXF;
+ const GLfloat bscale = 1.0F / CHAN_MAXF;
+ const GLfloat ascale = 1.0F / CHAN_MAXF;
+ GLuint i;
+
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+#if CHAN_TYPE == GL_FLOAT
+ GLfloat Rs, Gs, Bs, As; /* Source colors */
+ GLfloat Rd, Gd, Bd, Ad; /* Dest colors */
+#else
+ GLint Rs, Gs, Bs, As; /* Source colors */
+ GLint Rd, Gd, Bd, Ad; /* Dest colors */
+#endif
+ GLfloat sR, sG, sB, sA; /* Source scaling */
+ GLfloat dR, dG, dB, dA; /* Dest scaling */
+ GLfloat r, g, b, a; /* result color */
+
+ /* Incoming/source Color */
+ Rs = rgba[i][RCOMP];
+ Gs = rgba[i][GCOMP];
+ Bs = rgba[i][BCOMP];
+ As = rgba[i][ACOMP];
+#if CHAN_TYPE == GL_FLOAT
+ /* clamp */
+ Rs = MIN2(Rs, CHAN_MAXF);
+ Gs = MIN2(Gs, CHAN_MAXF);
+ Bs = MIN2(Bs, CHAN_MAXF);
+ As = MIN2(As, CHAN_MAXF);
+#endif
+
+ /* Frame buffer/dest color */
+ Rd = dest[i][RCOMP];
+ Gd = dest[i][GCOMP];
+ Bd = dest[i][BCOMP];
+ Ad = dest[i][ACOMP];
+#if CHAN_TYPE == GL_FLOAT
+ /* clamp */
+ Rd = MIN2(Rd, CHAN_MAXF);
+ Gd = MIN2(Gd, CHAN_MAXF);
+ Bd = MIN2(Bd, CHAN_MAXF);
+ Ad = MIN2(Ad, CHAN_MAXF);
+#endif
+
+ /* 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 = (GLfloat) Rd * rscale;
+ sG = (GLfloat) Gd * gscale;
+ sB = (GLfloat) Bd * bscale;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ sR = 1.0F - (GLfloat) Rd * rscale;
+ sG = 1.0F - (GLfloat) Gd * gscale;
+ sB = 1.0F - (GLfloat) Bd * bscale;
+ break;
+ case GL_SRC_ALPHA:
+ sR = sG = sB = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ sR = sG = sB = 1.0F - (GLfloat) As * ascale;
+ break;
+ case GL_DST_ALPHA:
+ sR = sG = sB = (GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ sR = sG = sB = 1.0F - (GLfloat) Ad * ascale;
+ break;
+ case GL_SRC_ALPHA_SATURATE:
+ if (As < CHAN_MAX - Ad) {
+ sR = sG = sB = (GLfloat) As * ascale;
+ }
+ else {
+ sR = sG = sB = 1.0F - (GLfloat) Ad * ascale;
+ }
+ 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: /* GL_NV_blend_square */
+ sR = (GLfloat) Rs * rscale;
+ sG = (GLfloat) Gs * gscale;
+ sB = (GLfloat) Bs * bscale;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
+ sR = 1.0F - (GLfloat) Rs * rscale;
+ sG = 1.0F - (GLfloat) Gs * gscale;
+ sB = 1.0F - (GLfloat) Bs * bscale;
+ break;
+ default:
+ /* this should never happen */
+ _mesa_problem(ctx, "Bad blend source RGB factor in do_blend");
+ 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 = (GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_COLOR:
+ sA = 1.0F - (GLfloat) Ad * ascale;
+ break;
+ case GL_SRC_ALPHA:
+ sA = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ sA = 1.0F - (GLfloat) As * ascale;
+ break;
+ case GL_DST_ALPHA:
+ sA =(GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ sA = 1.0F - (GLfloat) Ad * ascale;
+ 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: /* GL_NV_blend_square */
+ sA = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
+ sA = 1.0F - (GLfloat) As * ascale;
+ break;
+ default:
+ /* this should never happen */
+ sA = 0.0F;
+ _mesa_problem(ctx, "Bad blend source A factor in do_blend");
+ }
+
+ /* 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 = (GLfloat) Rs * rscale;
+ dG = (GLfloat) Gs * gscale;
+ dB = (GLfloat) Bs * bscale;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ dR = 1.0F - (GLfloat) Rs * rscale;
+ dG = 1.0F - (GLfloat) Gs * gscale;
+ dB = 1.0F - (GLfloat) Bs * bscale;
+ break;
+ case GL_SRC_ALPHA:
+ dR = dG = dB = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ dR = dG = dB = 1.0F - (GLfloat) As * ascale;
+ break;
+ case GL_DST_ALPHA:
+ dR = dG = dB = (GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ dR = dG = dB = 1.0F - (GLfloat) Ad * ascale;
+ 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: /* GL_NV_blend_square */
+ dR = (GLfloat) Rd * rscale;
+ dG = (GLfloat) Gd * gscale;
+ dB = (GLfloat) Bd * bscale;
+ break;
+ case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
+ dR = 1.0F - (GLfloat) Rd * rscale;
+ dG = 1.0F - (GLfloat) Gd * gscale;
+ dB = 1.0F - (GLfloat) Bd * bscale;
+ break;
+ default:
+ /* this should never happen */
+ dR = dG = dB = 0.0F;
+ _mesa_problem(ctx, "Bad blend dest RGB factor in do_blend");
+ }
+
+ /* 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 = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_COLOR:
+ dA = 1.0F - (GLfloat) As * ascale;
+ break;
+ case GL_SRC_ALPHA:
+ dA = (GLfloat) As * ascale;
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ dA = 1.0F - (GLfloat) As * ascale;
+ break;
+ case GL_DST_ALPHA:
+ dA = (GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_ALPHA:
+ dA = 1.0F - (GLfloat) Ad * ascale;
+ 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: /* GL_NV_blend_square */
+ dA = (GLfloat) Ad * ascale;
+ break;
+ case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
+ dA = 1.0F - (GLfloat) Ad * ascale;
+ break;
+ default:
+ /* this should never happen */
+ dA = 0.0F;
+ _mesa_problem(ctx, "Bad blend dest A factor in do_blend");
+ return;
+ }
+
+ /* Due to round-off problems we have to clamp against zero. */
+ /* Optimization: we don't have to do this for all src & dst factors */
+ if (dA < 0.0F) dA = 0.0F;
+ if (dR < 0.0F) dR = 0.0F;
+ if (dG < 0.0F) dG = 0.0F;
+ if (dB < 0.0F) dB = 0.0F;
+ if (sA < 0.0F) sA = 0.0F;
+ if (sR < 0.0F) sR = 0.0F;
+ if (sG < 0.0F) sG = 0.0F;
+ if (sB < 0.0F) sB = 0.0F;
+
+ ASSERT( sR <= 1.0 );
+ ASSERT( sG <= 1.0 );
+ ASSERT( sB <= 1.0 );
+ ASSERT( sA <= 1.0 );
+ ASSERT( dR <= 1.0 );
+ ASSERT( dG <= 1.0 );
+ ASSERT( dB <= 1.0 );
+ ASSERT( dA <= 1.0 );
+
+ /* compute blended color */
+#if CHAN_TYPE == GL_FLOAT
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {
+ r = Rs * sR + Rd * dR;
+ g = Gs * sG + Gd * dG;
+ b = Bs * sB + Bd * dB;
+ a = As * sA + Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_SUBTRACT) {
+ r = Rs * sR - Rd * dR;
+ g = Gs * sG - Gd * dG;
+ b = Bs * sB - Bd * dB;
+ a = As * sA - Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_REVERSE_SUBTRACT) {
+ r = Rd * dR - Rs * sR;
+ g = Gd * dG - Gs * sG;
+ b = Bd * dB - Bs * sB;
+ a = Ad * dA - As * sA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MIN) {
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MAX) {
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ }
+ else {
+ /* should never get here */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ if (ctx->Color.BlendEquationA==GL_FUNC_ADD) {
+ a = As * sA + Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_SUBTRACT) {
+ a = As * sA - Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_REVERSE_SUBTRACT) {
+ a = Ad * dA - As * sA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_MIN) {
+ a = MIN2( Ad, As );
+ }
+ else if (ctx->Color.BlendEquationA==GL_MAX) {
+ a = MAX2( Ad, As );
+ }
+ else {
+ /* should never get here */
+ a = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ /* final clamping */
+ 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, CHAN_MAXF );
+#else
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {
+ r = Rs * sR + Rd * dR + 0.5F;
+ g = Gs * sG + Gd * dG + 0.5F;
+ b = Bs * sB + Bd * dB + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_SUBTRACT) {
+ r = Rs * sR - Rd * dR + 0.5F;
+ g = Gs * sG - Gd * dG + 0.5F;
+ b = Bs * sB - Bd * dB + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_REVERSE_SUBTRACT) {
+ r = Rd * dR - Rs * sR + 0.5F;
+ g = Gd * dG - Gs * sG + 0.5F;
+ b = Bd * dB - Bs * sB + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MIN) {
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MAX) {
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ }
+ else {
+ /* should never get here */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ if (ctx->Color.BlendEquationA==GL_FUNC_ADD) {
+ a = As * sA + Ad * dA + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_SUBTRACT) {
+ a = As * sA - Ad * dA + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_REVERSE_SUBTRACT) {
+ a = Ad * dA - As * sA + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationA==GL_MIN) {
+ a = MIN2( Ad, As );
+ }
+ else if (ctx->Color.BlendEquationA==GL_MAX) {
+ a = MAX2( Ad, As );
+ }
+ else {
+ /* should never get here */
+ a = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ /* final clamping */
+ rgba[i][RCOMP] = (GLchan) (GLint) CLAMP( r, 0.0F, CHAN_MAXF );
+ rgba[i][GCOMP] = (GLchan) (GLint) CLAMP( g, 0.0F, CHAN_MAXF );
+ rgba[i][BCOMP] = (GLchan) (GLint) CLAMP( b, 0.0F, CHAN_MAXF );
+ rgba[i][ACOMP] = (GLchan) (GLint) CLAMP( a, 0.0F, CHAN_MAXF );
+#endif
+ }
+ }
+}
+
+
+/*
+ * Analyze current blending parameters to pick fastest blending function.
+ * Result: the ctx->Color.BlendFunc pointer is updated.
+ */
+void _swrast_choose_blend_func( GLcontext *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_CONTEXT(ctx)->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 ) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_min;
+ }
+ else
+#endif
+ SWRAST_CONTEXT(ctx)->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 ) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_max;
+ }
+ else
+#endif
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_max;
+ }
+ else if (srcRGB != srcA || dstRGB != dstA) {
+ SWRAST_CONTEXT(ctx)->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 ) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_transparency;
+ }
+ else
+#endif
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_transparency;
+ }
+ else if (eq==GL_FUNC_ADD && srcRGB==GL_ONE && dstRGB==GL_ONE) {
+#if defined(USE_MMX_ASM)
+ if ( cpu_has_mmx ) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_add;
+ }
+ else
+#endif
+ SWRAST_CONTEXT(ctx)->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 ) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_modulate;
+ }
+ else
+#endif
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_modulate;
+ }
+ else if (eq==GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_noop;
+ }
+ else if (eq==GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_replace;
+ }
+ else {
+ SWRAST_CONTEXT(ctx)->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,
+ const struct sw_span *span, GLchan rgba[][4])
+{
+ GLchan framebuffer[MAX_WIDTH][4];
+
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(!ctx->Color._LogicOpEnabled);
+
+ /* Read span of current frame buffer pixels */
+ if (span->arrayMask & SPAN_XY) {
+ /* array of x/y pixel coords */
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ framebuffer, 4 * sizeof(GLchan));
+ }
+ else {
+ /* horizontal run of pixels */
+ _swrast_read_rgba_span(ctx, rb, span->end, span->x, span->y,
+ framebuffer);
+ }
+
+ SWRAST_CONTEXT(ctx)->BlendFunc( ctx, span->end, span->array->mask, rgba,
+ (const GLchan (*)[4]) framebuffer );
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.h
new file mode 100644
index 000000000..c95193215
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_blend.h
@@ -0,0 +1,43 @@
+/*
+ * 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_BLEND_H
+#define S_BLEND_H
+
+
+#include "mtypes.h"
+#include "s_context.h"
+
+
+extern void
+_swrast_blend_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLchan rgba[][4]);
+
+
+extern void
+_swrast_choose_blend_func(GLcontext *ctx);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c
new file mode 100644
index 000000000..a7dc8a3af
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c
@@ -0,0 +1,408 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4.1
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "macros.h"
+#include "imports.h"
+#include "mtypes.h"
+#include "fbobject.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)
+{
+ 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;
+ GLchan clearColor[4];
+ GLint i;
+
+ ASSERT(ctx->Visual.rgbMode);
+ ASSERT(rb->PutRow);
+
+ CLAMPED_FLOAT_TO_CHAN(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+
+ for (i = 0; i < height; i++) {
+ GLchan rgba[MAX_WIDTH][4];
+ GLint j;
+ for (j = 0; j < width; j++) {
+ COPY_CHAN4(rgba[j], clearColor);
+ }
+ _swrast_mask_rgba_array( ctx, rb, width, x, y + i, rgba );
+ rb->PutRow(ctx, rb, width, x, y + i, rgba, NULL);
+ }
+}
+
+
+/**
+ * Clear color index buffer with masking.
+ */
+static void
+clear_ci_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ 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;
+ GLuint span[MAX_WIDTH];
+ GLubyte mask[MAX_WIDTH];
+ GLint i, j;
+
+ ASSERT(!ctx->Visual.rgbMode);
+
+ MEMSET( mask, 1, width );
+ for (i = 0; i < height;i++) {
+ for (j = 0; j < width;j++) {
+ span[j] = ctx->Color.ClearIndex;
+ }
+ _swrast_mask_ci_array(ctx, rb, width, x, y + i, span);
+ ASSERT(rb->PutRow);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->PutRow(ctx, rb, width, x, y + i, span, mask);
+ }
+}
+
+
+/**
+ * Clear an rgba color buffer without channel masking.
+ */
+static void
+clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ 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->Visual.rgbMode);
+
+ ASSERT(ctx->Color.ColorMask[0] &&
+ ctx->Color.ColorMask[1] &&
+ ctx->Color.ColorMask[2] &&
+ ctx->Color.ColorMask[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 color index buffer without masking.
+ */
+static void
+clear_ci_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ 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;
+ GLushort clear16;
+ GLuint clear32;
+ GLvoid *clearVal;
+ GLint i;
+
+ ASSERT(!ctx->Visual.rgbMode);
+
+ ASSERT((ctx->Color.IndexMask & ((1 << ctx->Visual.indexBits) - 1))
+ == (GLuint) ((1 << ctx->Visual.indexBits) - 1));
+
+ ASSERT(rb->PutMonoRow);
+
+ /* setup clear value */
+ switch (rb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ clear8 = (GLubyte) ctx->Color.ClearIndex;
+ clearVal = &clear8;
+ break;
+ case GL_UNSIGNED_SHORT:
+ clear16 = (GLushort) ctx->Color.ClearIndex;
+ clearVal = &clear16;
+ break;
+ case GL_UNSIGNED_INT:
+ clear32 = ctx->Color.ClearIndex;
+ clearVal = &clear32;
+ 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)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean masking;
+ GLuint i;
+
+ if (ctx->Visual.rgbMode) {
+ if (ctx->Color.ColorMask[0] &&
+ ctx->Color.ColorMask[1] &&
+ ctx->Color.ColorMask[2] &&
+ ctx->Color.ColorMask[3]) {
+ masking = GL_FALSE;
+ }
+ else {
+ masking = GL_TRUE;
+ }
+ }
+ else {
+ const GLuint indexBits = (1 << ctx->Visual.indexBits) - 1;
+ if ((ctx->Color.IndexMask & indexBits) == indexBits) {
+ masking = GL_FALSE;
+ }
+ else {
+ masking = GL_TRUE;
+ }
+ }
+
+ for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers[0]; i++) {
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][i];
+#if OLD_RENDERBUFFER
+ /* SetBuffer will go away */
+ if (swrast->Driver.SetBuffer)
+ swrast->Driver.SetBuffer(ctx, ctx->DrawBuffer,
+ ctx->DrawBuffer->_ColorDrawBit[0][i]);
+#endif
+
+ if (ctx->Visual.rgbMode) {
+ if (masking) {
+ clear_rgba_buffer_with_masking(ctx, rb);
+ }
+ else {
+ clear_rgba_buffer(ctx, rb);
+ }
+ }
+ else {
+ if (masking) {
+ clear_ci_buffer_with_masking(ctx, rb);
+ }
+ else {
+ clear_ci_buffer(ctx, rb);
+ }
+ }
+ }
+
+ /* restore default read/draw buffer */
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+/**
+ * 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 mask bitwise-OR of DD_*_BIT flags.
+ * \param all if GL_TRUE, clear whole buffer, else clear specified region.
+ */
+void
+_swrast_Clear(GLcontext *ctx, GLbitfield mask,
+ GLboolean all, GLint x, GLint y, GLint width, GLint height)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ (void) all; (void) x; (void) y; (void) width; (void) height;
+
+#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 |
+ BUFFER_BIT_AUX1 |
+ BUFFER_BIT_AUX2 |
+ BUFFER_BIT_AUX3;
+ assert((mask & (~legalBits)) == 0);
+ }
+#endif
+
+ RENDER_START(swrast,ctx);
+
+ /* do software clearing here */
+ if (mask) {
+ if (mask & ctx->DrawBuffer->_ColorDrawBufferMask[0]) {
+ clear_color_buffers(ctx);
+ }
+ if (mask & BUFFER_BIT_DEPTH) {
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ _swrast_clear_depth_buffer(ctx, rb);
+ }
+ if (mask & BUFFER_BIT_ACCUM) {
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ _swrast_clear_accum_buffer(ctx, rb);
+ }
+ if (mask & BUFFER_BIT_STENCIL) {
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ _swrast_clear_stencil_buffer(ctx, rb);
+ }
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
+
+
+/*
+ * Fallback for ctx->Driver.DrawBuffer()
+ */
+void
+_swrast_DrawBuffer( GLcontext *ctx, GLenum mode )
+{
+ (void) mode;
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+/*
+ * Fallback for ctx->Driver.DrawBuffers()
+ */
+void
+_swrast_DrawBuffers( GLcontext *ctx, GLsizei n, const GLenum *buffers )
+{
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+/*
+ * Setup things so that we read/write spans from the user-designated
+ * read buffer (set via glReadPixels). We usually just have to call
+ * this for glReadPixels, glCopyPixels, etc.
+ */
+void
+_swrast_use_read_buffer( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* Do this so the software-emulated alpha plane span functions work! */
+ swrast->CurrentBufferBit = ctx->ReadBuffer->_ColorReadBufferMask;
+ /* Tell the device driver where to read/write spans */
+ if (swrast->Driver.SetBuffer)
+ swrast->Driver.SetBuffer(ctx, ctx->ReadBuffer, swrast->CurrentBufferBit);
+}
+
+
+/*
+ * Setup things so that we read/write spans from the default draw buffer.
+ * This is the usual mode that Mesa's software rasterizer operates in.
+ */
+void
+_swrast_use_draw_buffer( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* The user can specify rendering to zero, one, two, or four color
+ * buffers simultaneously with glDrawBuffer()!
+ * We don't expect the span/point/line/triangle functions to deal with
+ * that mess so we'll iterate over the multiple buffers as needed.
+ * But usually we only render to one color buffer at a time.
+ * We set ctx->Color._DriverDrawBuffer to that buffer and tell the
+ * device driver to use that buffer.
+ * Look in s_span.c's multi_write_rgba_span() function to see how
+ * we loop over multiple color buffers when needed.
+ */
+
+ if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_LEFT)
+ swrast->CurrentBufferBit = BUFFER_BIT_FRONT_LEFT;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_BACK_LEFT)
+ swrast->CurrentBufferBit = BUFFER_BIT_BACK_LEFT;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_RIGHT)
+ swrast->CurrentBufferBit = BUFFER_BIT_FRONT_RIGHT;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_BACK_RIGHT)
+ swrast->CurrentBufferBit = BUFFER_BIT_BACK_RIGHT;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX0)
+ swrast->CurrentBufferBit = BUFFER_BIT_AUX0;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX1)
+ swrast->CurrentBufferBit = BUFFER_BIT_AUX1;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX2)
+ swrast->CurrentBufferBit = BUFFER_BIT_AUX2;
+ else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX3)
+ swrast->CurrentBufferBit = BUFFER_BIT_AUX3;
+ else
+ /* glDrawBuffer(GL_NONE) */
+ swrast->CurrentBufferBit = BUFFER_BIT_FRONT_LEFT; /* we always have this buffer */
+
+ if (swrast->Driver.SetBuffer)
+ swrast->Driver.SetBuffer(ctx, ctx->DrawBuffer, swrast->CurrentBufferBit);
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_context.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.c
new file mode 100644
index 000000000..a12703845
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.c
@@ -0,0 +1,750 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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 "imports.h"
+#include "bufferobj.h"
+#include "context.h"
+#include "colormac.h"
+#include "mtypes.h"
+#include "program.h"
+#include "texobj.h"
+#include "nvfragprog.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_texture.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);
+ GLuint rasterMask = 0;
+
+ 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;
+ if (ctx->Visual.rgbMode) {
+ const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
+ if (colorMask != 0xffffffff) rasterMask |= MASKING_BIT;
+ if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT;
+ if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT;
+ }
+ else {
+ if (ctx->Color.IndexMask != 0xffffffff) rasterMask |= MASKING_BIT;
+ if (ctx->Color.IndexLogicOpEnabled) rasterMask |= LOGIC_OP_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->Depth.OcclusionTest || ctx->Occlusion.Active)
+ 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[0] != 1) {
+ /* more than one color buffer designated for writing (or zero buffers) */
+ rasterMask |= MULTI_DRAW_BIT;
+ }
+ else if (ctx->Visual.rgbMode && *((GLuint *) ctx->Color.ColorMask) == 0) {
+ rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
+ }
+ else if (!ctx->Visual.rgbMode && ctx->Color.IndexMask==0) {
+ rasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */
+ }
+
+ if (ctx->FragmentProgram._Active) {
+ rasterMask |= FRAGPROG_BIT;
+ }
+
+ if (ctx->ATIFragmentShader._Enabled) {
+ rasterMask |= ATIFRAGSHADER_BIT;
+ }
+
+ SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
+}
+
+
+/**
+ * Examine polycon culls tate to compute the _BackfaceSign field.
+ * _BackfaceSign 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 = 1;
+
+ if (ctx->Polygon.CullFlag) {
+ backface_sign = 1;
+ switch(ctx->Polygon.CullFaceMode) {
+ case GL_BACK:
+ if(ctx->Polygon.FrontFace==GL_CCW)
+ backface_sign = -1;
+ break;
+ case GL_FRONT:
+ if(ctx->Polygon.FrontFace!=GL_CCW)
+ backface_sign = -1;
+ break;
+ default:
+ case GL_FRONT_AND_BACK:
+ backface_sign = 0;
+ break;
+ }
+ }
+ else {
+ backface_sign = 0;
+ }
+
+ SWRAST_CONTEXT(ctx)->_BackfaceSign = backface_sign;
+}
+
+
+/**
+ * Update the _PreferPixelFog field to indicate if we need to compute
+ * fog factors per-fragment.
+ */
+static void
+_swrast_update_fog_hint( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
+ ctx->FragmentProgram._Enabled || /* not _Active! */
+ (ctx->Hint.Fog == GL_NICEST &&
+ swrast->AllowPixelFog));
+}
+
+
+
+/**
+ * Update the swrast->_AnyTextureCombine flag.
+ */
+static void
+_swrast_update_texture_env( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+ swrast->_AnyTextureCombine = GL_FALSE;
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+ if (ctx->Texture.Unit[i].EnvMode == GL_COMBINE_EXT ||
+ ctx->Texture.Unit[i].EnvMode == GL_COMBINE4_NV) {
+ swrast->_AnyTextureCombine = GL_TRUE;
+ return;
+ }
+ }
+}
+
+
+/**
+ * Update swrast->_FogColor and swrast->_FogEnable values.
+ */
+static void
+_swrast_update_fog_state( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* convert fog color to GLchan values */
+ CLAMPED_FLOAT_TO_CHAN(swrast->_FogColor[RCOMP], ctx->Fog.Color[RCOMP]);
+ CLAMPED_FLOAT_TO_CHAN(swrast->_FogColor[GCOMP], ctx->Fog.Color[GCOMP]);
+ CLAMPED_FLOAT_TO_CHAN(swrast->_FogColor[BCOMP], ctx->Fog.Color[BCOMP]);
+
+ /* determine if fog is needed, and if so, which fog mode */
+ swrast->_FogEnabled = GL_FALSE;
+ if (ctx->FragmentProgram._Active) {
+ if (ctx->FragmentProgram._Current->Base.Target==GL_FRAGMENT_PROGRAM_ARB) {
+ const struct fragment_program *p
+ = (struct fragment_program *) ctx->FragmentProgram._Current;
+ if (p->FogOption != GL_NONE) {
+ swrast->_FogEnabled = GL_TRUE;
+ swrast->_FogMode = p->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 )
+{
+ if (ctx->FragmentProgram._Active) {
+ struct fragment_program *program = ctx->FragmentProgram._Current;
+ _mesa_load_state_parameters(ctx, program->Parameters);
+ }
+}
+
+
+
+#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
+ _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 );
+
+ if (ctx->Texture._EnabledUnits == 0
+ && NEED_SECONDARY_COLOR(ctx)
+ && !ctx->FragmentProgram._Active) {
+ /* 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 );
+
+ if (ctx->Texture._EnabledUnits == 0
+ && NEED_SECONDARY_COLOR(ctx)
+ && !ctx->FragmentProgram._Active) {
+ 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 (ctx->Texture._EnabledUnits == 0
+ && NEED_SECONDARY_COLOR(ctx)
+ && !ctx->FragmentProgram._Active) {
+ 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[],
+ GLchan src[][4],
+ CONST GLchan dst[][4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ _swrast_choose_blend_func( ctx );
+
+ swrast->BlendFunc( ctx, n, mask, src, dst );
+}
+
+
+/**
+ * Called via the swrast->TextureSample[i] function pointer.
+ * Basically, given a texture object, an array of texture coords
+ * and an array of level-of-detail values, return an array of colors.
+ * In this case, determine the correct texture sampling routine
+ * (depending on filter mode, texture dimensions, etc) then call the
+ * sampler routine.
+ */
+static void
+_swrast_validate_texture_sample( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+
+ /* Compute min/mag filter threshold */
+ if (tObj && tObj->MinFilter != tObj->MagFilter) {
+ if (tObj->MagFilter == GL_LINEAR
+ && (tObj->MinFilter == GL_NEAREST_MIPMAP_NEAREST ||
+ tObj->MinFilter == GL_NEAREST_MIPMAP_LINEAR)) {
+ swrast->_MinMagThresh[texUnit] = 0.5F;
+ }
+ else {
+ swrast->_MinMagThresh[texUnit] = 0.0F;
+ }
+ }
+
+ swrast->TextureSample[texUnit] =
+ _swrast_choose_texture_sample_func( ctx, tObj );
+
+ swrast->TextureSample[texUnit]( ctx, texUnit, tObj, n, texcoords,
+ lambda, rgba );
+}
+
+
+static void
+_swrast_sleep( GLcontext *ctx, GLuint new_state )
+{
+ (void) ctx; (void) new_state;
+}
+
+
+static void
+_swrast_invalidate_state( GLcontext *ctx, GLuint 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->invalidate_triangle)
+ swrast->Triangle = _swrast_validate_triangle;
+
+ if (new_state & swrast->invalidate_line)
+ swrast->Line = _swrast_validate_line;
+
+ if (new_state & swrast->invalidate_point)
+ 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.MaxTextureUnits ; i++)
+ swrast->TextureSample[i] = _swrast_validate_texture_sample;
+}
+
+
+void
+_swrast_validate_derived( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->NewState) {
+ if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
+ _swrast_update_rasterflags( ctx );
+
+ 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)
+ _swrast_update_fragment_program( 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, GLuint 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_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->invalidate_point = _SWRAST_NEW_POINT;
+ swrast->invalidate_line = _SWRAST_NEW_LINE;
+ swrast->invalidate_triangle = _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;
+
+ if (ctx->Visual.doubleBufferMode)
+ swrast->CurrentBufferBit = BUFFER_BIT_BACK_LEFT;
+ else
+ swrast->CurrentBufferBit = BUFFER_FRONT_LEFT;
+
+ /* Optimized Accum buffer */
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
+
+ for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+ swrast->TextureSample[i] = _swrast_validate_texture_sample;
+
+ swrast->SpanArrays = MALLOC_STRUCT(span_arrays);
+ if (!swrast->SpanArrays) {
+ FREE(swrast);
+ return GL_FALSE;
+ }
+
+ /* init point span buffer */
+ swrast->PointSpan.primitive = GL_POINT;
+ swrast->PointSpan.start = 0;
+ swrast->PointSpan.end = 0;
+ swrast->PointSpan.facing = 0;
+ swrast->PointSpan.array = swrast->SpanArrays;
+
+ assert(ctx->Const.MaxTextureUnits > 0);
+ assert(ctx->Const.MaxTextureUnits <= MAX_TEXTURE_UNITS);
+
+ swrast->TexelBuffer = (GLchan *) MALLOC(ctx->Const.MaxTextureUnits *
+ MAX_WIDTH * 4 * sizeof(GLchan));
+ 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 );
+ 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) {
+ if (ctx->Visual.rgbMode) {
+ _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
+ }
+ else {
+ _swrast_write_index_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->win[0], v->win[1], v->win[2], v->win[3]);
+
+ for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
+ if (ctx->Texture.Unit[i]._ReallyEnabled)
+ _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
+ v->texcoord[i][0], v->texcoord[i][1],
+ v->texcoord[i][2], v->texcoord[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]);
+ _mesa_debug(ctx, "spec %f %f %f %f\n",
+ v->specular[0], v->specular[1],
+ v->specular[2], v->specular[3]);
+#else
+ _mesa_debug(ctx, "color %d %d %d %d\n",
+ v->color[0], v->color[1], v->color[2], v->color[3]);
+ _mesa_debug(ctx, "spec %d %d %d %d\n",
+ v->specular[0], v->specular[1],
+ v->specular[2], v->specular[3]);
+#endif
+ _mesa_debug(ctx, "fog %f\n", v->fog);
+ _mesa_debug(ctx, "index %d\n", v->index);
+ _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
+ _mesa_debug(ctx, "\n");
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h
new file mode 100644
index 000000000..5f5efdc22
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h
@@ -0,0 +1,411 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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 "mtypes.h"
+#include "swrast.h"
+
+
+/**
+ * \defgroup SpanFlags SPAN_XXX-flags
+ * Bitmasks to indicate which span_arrays need to be computed
+ * (sw_span::interpMask) or have already been filled
+ * (sw_span::arrayMask)
+ */
+/*@{*/
+#define SPAN_RGBA 0x001
+#define SPAN_SPEC 0x002
+#define SPAN_INDEX 0x004
+#define SPAN_Z 0x008
+#define SPAN_W 0x010
+#define SPAN_FOG 0x020
+#define SPAN_TEXTURE 0x040
+#define SPAN_INT_TEXTURE 0x080
+#define SPAN_LAMBDA 0x100
+#define SPAN_COVERAGE 0x200
+#define SPAN_FLAT 0x400 /**< flat shading? */
+/** sw_span::arrayMask only - for span_arrays::x, span_arrays::y */
+#define SPAN_XY 0x800
+#define SPAN_MASK 0x1000 /**< sw_span::arrayMask only */
+/*@}*/
+
+
+/**
+ * \struct span_arrays
+ * \brief Arrays of fragment values.
+ *
+ * These will either be computed from the x/xStep values above or
+ * filled in by glDraw/CopyPixels, etc.
+ * These arrays are separated out of sw_span to conserve memory.
+ */
+struct span_arrays {
+ GLchan rgb[MAX_WIDTH][3];
+ GLchan rgba[MAX_WIDTH][4];
+ GLuint index[MAX_WIDTH];
+ GLchan spec[MAX_WIDTH][4]; /* specular color */
+ GLint x[MAX_WIDTH]; /**< X/Y used for point/line rendering only */
+ GLint y[MAX_WIDTH]; /**< X/Y used for point/line rendering only */
+ GLdepth z[MAX_WIDTH];
+ GLfloat fog[MAX_WIDTH];
+ GLfloat texcoords[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH][4];
+ GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH];
+ GLfloat coverage[MAX_WIDTH];
+
+ /** This mask indicates if fragment is alive or culled */
+ GLubyte mask[MAX_WIDTH];
+};
+
+
+/**
+ * \struct sw_span
+ * \brief Contains data for either a horizontal line or a set of
+ * pixels that are passed through a pipeline of functions before being
+ * drawn.
+ *
+ * The sw_span 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 arrays of values. The interpMask and arrayMask bitfields
+ * indicate which are active.
+ *
+ * With this structure it's easy to hand-off span rasterization to
+ * subroutines instead of doing it all inline in the triangle functions
+ * like we used to do.
+ * It also cleans up the local variable namespace a great deal.
+ *
+ * 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.
+ */
+struct sw_span {
+ GLint x, y;
+
+ /** Only need to process pixels between start <= i < end */
+ /** At this time, start is always zero. */
+ GLuint start, end;
+
+ /** 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 x/xStep variables are relevant.
+ */
+ GLuint interpMask;
+
+ /* For horizontal spans, step is the partial derivative wrt X.
+ * For lines, step is the delta from one fragment to the next.
+ */
+#if CHAN_TYPE == GL_FLOAT
+ GLfloat red, redStep;
+ GLfloat green, greenStep;
+ GLfloat blue, blueStep;
+ GLfloat alpha, alphaStep;
+ GLfloat specRed, specRedStep;
+ GLfloat specGreen, specGreenStep;
+ GLfloat specBlue, specBlueStep;
+#else /* CHAN_TYPE == GL_UNSIGNED_BYTE or GL_UNSIGNED_SHORT */
+ GLfixed red, redStep;
+ GLfixed green, greenStep;
+ GLfixed blue, blueStep;
+ GLfixed alpha, alphaStep;
+ GLfixed specRed, specRedStep;
+ GLfixed specGreen, specGreenStep;
+ GLfixed specBlue, specBlueStep;
+#endif
+ GLfixed index, indexStep;
+ GLfixed z, zStep;
+ GLfloat fog, fogStep;
+ GLfloat tex[MAX_TEXTURE_COORD_UNITS][4]; /* s, t, r, q */
+ GLfloat texStepX[MAX_TEXTURE_COORD_UNITS][4];
+ GLfloat texStepY[MAX_TEXTURE_COORD_UNITS][4];
+ GLfixed intTex[2], intTexStep[2]; /* s, t only */
+
+ /* partial derivatives wrt X and Y. */
+ GLfloat dzdx, dzdy;
+ GLfloat w, dwdx, dwdy;
+ GLfloat drdx, drdy;
+ GLfloat dgdx, dgdy;
+ GLfloat dbdx, dbdy;
+ GLfloat dadx, dady;
+ GLfloat dsrdx, dsrdy;
+ GLfloat dsgdx, dsgdy;
+ GLfloat dsbdx, dsbdy;
+ GLfloat dfogdx, dfogdy;
+
+ /**
+ * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates
+ * which of the fragment arrays in the span_arrays struct are relevant.
+ */
+ GLuint arrayMask;
+
+ /**
+ * 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 400KB while the
+ * sw_span struct is only about 512 bytes.
+ */
+ struct span_arrays *array;
+};
+
+
+#define INIT_SPAN(S, PRIMITIVE, END, INTERP_MASK, ARRAY_MASK) \
+do { \
+ (S).primitive = (PRIMITIVE); \
+ (S).interpMask = (INTERP_MASK); \
+ (S).arrayMask = (ARRAY_MASK); \
+ (S).start = 0; \
+ (S).end = (END); \
+ (S).facing = 0; \
+ (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \
+} while (0)
+
+
+typedef void (*texture_sample_func)(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4]);
+
+typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n,
+ const GLubyte mask[],
+ GLchan src[][4], CONST GLchan dst[][4] );
+
+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 *);
+
+
+/** \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 _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 SWContext?
+ */
+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():
+ */
+ GLuint _RasterMask;
+ GLfloat _MinMagThresh[MAX_TEXTURE_IMAGE_UNITS];
+ GLfloat _BackfaceSign;
+ GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
+ GLboolean _AnyTextureCombine;
+ GLchan _FogColor[3];
+ GLboolean _FogEnabled;
+ GLenum _FogMode; /* either GL_FOG_MODE or fragment program's fog mode */
+
+ /* Accum buffer temporaries.
+ */
+ GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
+ GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
+
+ /* Working values:
+ */
+ GLuint StippleCounter; /**< Line stipple counter */
+ GLuint NewState;
+ GLuint StateChanges;
+ GLenum Primitive; /* current primitive being drawn (ala glBegin) */
+ GLbitfield CurrentBufferBit; /* exactly one the of DD_*_BIT buffer bits */
+
+ /** Mechanism to allow driver (like X11) to register further
+ * software rasterization routines.
+ */
+ /*@{*/
+ void (*choose_point)( GLcontext * );
+ void (*choose_line)( GLcontext * );
+ void (*choose_triangle)( GLcontext * );
+
+ GLuint invalidate_point;
+ GLuint invalidate_line;
+ GLuint invalidate_triangle;
+ /*@}*/
+
+ /** Function pointers for dispatch behind public entrypoints. */
+ /*@{*/
+ void (*InvalidateState)( GLcontext *ctx, GLuint new_state );
+
+ 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.
+ */
+ struct span_arrays *SpanArrays;
+
+ /**
+ * Used to buffer N GL_POINTS, instead of rendering one by one.
+ */
+ struct sw_span PointSpan;
+
+ /** Internal hooks, kept uptodate 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.
+ */
+ GLchan *TexelBuffer;
+
+} SWcontext;
+
+
+extern void
+_swrast_validate_derived( GLcontext *ctx );
+
+
+#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
+
+#define RENDER_START(SWctx, GLctx) \
+ do { \
+ if ((SWctx)->Driver.SpanRenderStart) { \
+ (*(SWctx)->Driver.SpanRenderStart)(GLctx); \
+ } \
+ } while (0)
+
+#define RENDER_FINISH(SWctx, GLctx) \
+ do { \
+ if ((SWctx)->Driver.SpanRenderFinish) { \
+ (*(SWctx)->Driver.SpanRenderFinish)(GLctx); \
+ } \
+ } while (0)
+
+
+
+/*
+ * 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
+
+
+
+extern void
+_swrast_translate_program( GLcontext *ctx );
+
+extern GLboolean
+_swrast_execute_codegen_program(GLcontext *ctx,
+ const struct fragment_program *program,
+ GLuint maxInst,
+ struct fp_machine *machine,
+ const struct sw_span *span,
+ GLuint column );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c
new file mode 100644
index 000000000..05f81c690
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c
@@ -0,0 +1,801 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "convolve.h"
+#include "histogram.h"
+#include "image.h"
+#include "macros.h"
+#include "imports.h"
+#include "pixel.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_pixeltex.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_texture.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.
+ */
+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 + (width * zoomX) + 1) || (srcx + width + 1 < dstx)) {
+ return GL_FALSE;
+ }
+ else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) {
+ return GL_FALSE;
+ }
+ else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) {
+ return GL_FALSE;
+ }
+ else {
+ return GL_TRUE;
+ }
+ }
+}
+
+
+/**
+ * Convert GLfloat[n][4] colors to GLchan[n][4].
+ * XXX maybe move into image.c
+ */
+static void
+float_span_to_chan(GLuint n, CONST GLfloat in[][4], GLchan out[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ UNCLAMPED_FLOAT_TO_CHAN(out[i][RCOMP], in[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(out[i][GCOMP], in[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(out[i][BCOMP], in[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_CHAN(out[i][ACOMP], in[i][ACOMP]);
+ }
+}
+
+
+/**
+ * Convert GLchan[n][4] colors to GLfloat[n][4].
+ * XXX maybe move into image.c
+ */
+static void
+chan_span_to_float(GLuint n, CONST GLchan in[][4], GLfloat out[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ out[i][RCOMP] = CHAN_TO_FLOAT(in[i][RCOMP]);
+ out[i][GCOMP] = CHAN_TO_FLOAT(in[i][GCOMP]);
+ out[i][BCOMP] = CHAN_TO_FLOAT(in[i][BCOMP]);
+ out[i][ACOMP] = CHAN_TO_FLOAT(in[i][ACOMP]);
+ }
+}
+
+
+
+/*
+ * RGBA copypixels with convolution.
+ */
+static void
+copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height, GLint destx, GLint desty)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *drawRb = NULL;
+ GLboolean quick_draw;
+ GLint row;
+ GLboolean changeBuffer;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ const GLuint transferOps = ctx->_ImageTransferState;
+ GLfloat *dest, *tmpImage, *convImage;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
+ && !zoom
+ && destx >= 0
+ && destx + width <= (GLint) ctx->DrawBuffer->Width) {
+ quick_draw = GL_TRUE;
+ drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ }
+ else {
+ quick_draw = GL_FALSE;
+ }
+
+ /* If read and draw buffer are different we must do buffer switching */
+ changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
+ || ctx->DrawBuffer != ctx->ReadBuffer;
+
+
+ /* 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;
+ }
+
+ if (changeBuffer) {
+ /* choose the read buffer */
+ _swrast_use_read_buffer(ctx);
+ }
+
+ /* read source image */
+ dest = tmpImage;
+ for (row = 0; row < height; row++) {
+ GLchan rgba[MAX_WIDTH][4];
+ /* Read GLchan and convert to GLfloat */
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, srcy + row, rgba);
+ chan_span_to_float(width, (CONST GLchan (*)[4]) rgba,
+ (GLfloat (*)[4]) dest);
+ dest += 4 * width;
+ }
+
+ if (changeBuffer) {
+ /* restore default src/dst buffer */
+ _swrast_use_draw_buffer(ctx);
+ }
+
+ /* 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);
+ }
+
+ /* write the new image */
+ for (row = 0; row < height; row++) {
+ const GLfloat *src = convImage + row * width * 4;
+ GLint dy;
+
+ /* convert floats back to chan */
+ float_span_to_chan(width, (const GLfloat (*)[4]) src, span.array->rgba);
+
+ if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
+ span.end = width;
+ _swrast_pixel_texture(ctx, &span);
+ }
+
+ /* write row to framebuffer */
+
+ dy = desty + row;
+ if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
+ drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
+ }
+ else if (zoom) {
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4])span.array->rgba,
+ desty, 0);
+ }
+ else {
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+
+ FREE(convImage);
+}
+
+
+/*
+ * RGBA copypixels
+ */
+static void
+copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height, GLint destx, GLint desty)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *drawRb;
+ GLchan *tmpImage,*p;
+ GLboolean quick_draw;
+ GLint sy, dy, stepy, j;
+ GLboolean changeBuffer;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ GLint overlapping;
+ const GLuint transferOps = ctx->_ImageTransferState;
+ struct sw_span span;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
+ copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
+ return;
+ }
+
+ /* Determine if copy should be done bottom-to-top or top-to-bottom */
+ if (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 (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
+ && !zoom
+ && destx >= 0
+ && destx + width <= (GLint) ctx->DrawBuffer->Width) {
+ quick_draw = GL_TRUE;
+ drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ }
+ else {
+ quick_draw = GL_FALSE;
+ drawRb = NULL;
+ }
+
+ /* If read and draw buffer are different we must do buffer switching */
+ changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
+ || ctx->DrawBuffer != ctx->ReadBuffer;
+
+ if (overlapping) {
+ GLint ssy = sy;
+ tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 4);
+ if (!tmpImage) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
+ return;
+ }
+ /* setup source */
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ /* read the source image */
+ p = tmpImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, ssy, (GLchan (*)[4]) p );
+ p += width * 4;
+ }
+ p = tmpImage;
+ /* restore dest */
+ if (changeBuffer) {
+ _swrast_use_draw_buffer(ctx);
+ changeBuffer = GL_FALSE;
+ }
+ }
+ else {
+ tmpImage = NULL; /* silence compiler warnings */
+ p = NULL;
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ /* Get source pixels */
+ if (overlapping) {
+ /* get from buffered image */
+ ASSERT(width < MAX_WIDTH);
+ MEMCPY(span.array->rgba, p, width * sizeof(GLchan) * 4);
+ p += width * 4;
+ }
+ else {
+ /* get from framebuffer */
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ ASSERT(width < MAX_WIDTH);
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy, span.array->rgba );
+ if (changeBuffer)
+ _swrast_use_draw_buffer(ctx);
+ }
+
+ if (transferOps) {
+ DEFMARRAY(GLfloat, rgbaFloat, MAX_WIDTH, 4); /* mac 32k limitation */
+ CHECKARRAY(rgbaFloat, return);
+
+ /* convert to float, transfer, convert back to chan */
+ chan_span_to_float(width, (CONST GLchan (*)[4]) span.array->rgba,
+ rgbaFloat);
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width, rgbaFloat);
+ float_span_to_chan(width, (CONST GLfloat (*)[4]) rgbaFloat,
+ span.array->rgba);
+
+ UNDEFARRAY(rgbaFloat); /* mac 32k limitation */
+ }
+
+ if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
+ span.end = width;
+ _swrast_pixel_texture(ctx, &span);
+ }
+
+ /* Write color span */
+ if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
+ drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
+ }
+ else if (zoom) {
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.array->rgba,
+ desty, 0);
+ }
+ else {
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+
+ if (overlapping)
+ FREE(tmpImage);
+}
+
+
+static void
+copy_ci_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint *tmpImage,*p;
+ GLint sy, dy, stepy;
+ GLint j;
+ GLboolean changeBuffer;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset;
+ GLint overlapping;
+ struct sw_span span;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (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 (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+ /* If read and draw buffer are different we must do buffer switching */
+ changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
+ || ctx->DrawBuffer != ctx->ReadBuffer;
+
+ if (overlapping) {
+ GLint ssy = sy;
+ tmpImage = (GLuint *) MALLOC(width * height * sizeof(GLuint));
+ if (!tmpImage) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
+ return;
+ }
+ /* setup source */
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ /* read the image */
+ p = tmpImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, ssy, p );
+ p += width;
+ }
+ p = tmpImage;
+ /* restore to draw buffer */
+ if (changeBuffer) {
+ _swrast_use_draw_buffer(ctx);
+ changeBuffer = GL_FALSE;
+ }
+ }
+ else {
+ tmpImage = NULL; /* silence compiler warning */
+ p = NULL;
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ /* Get color indexes */
+ if (overlapping) {
+ MEMCPY(span.array->index, p, width * sizeof(GLuint));
+ p += width;
+ }
+ else {
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy, span.array->index );
+ if (changeBuffer)
+ _swrast_use_draw_buffer(ctx);
+ }
+
+ /* Apply shift, offset, look-up table */
+ if (shift_or_offset) {
+ _mesa_shift_and_offset_ci( ctx, width, span.array->index );
+ }
+ if (ctx->Pixel.MapColorFlag) {
+ _mesa_map_ci( ctx, width, span.array->index );
+ }
+
+ /* write color indexes */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ if (zoom)
+ _swrast_write_zoomed_index_span(ctx, &span, desty, 0);
+ else
+ _swrast_write_index_span(ctx, &span);
+ }
+
+ if (overlapping)
+ FREE(tmpImage);
+}
+
+
+
+/*
+ * TODO: Optimize!!!!
+ */
+static void
+copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+ struct gl_renderbuffer *readRb
+ = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLfloat *p, *tmpImage;
+ GLint sy, dy, stepy;
+ GLint i, j;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ GLint overlapping;
+ struct sw_span span;
+
+ if (!readRb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
+
+ if (!ctx->Visual.depthBits) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
+ return;
+ }
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (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 (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ _swrast_span_default_color(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+ 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 */
+ for (i = 0; i < width; i++) {
+ GLfloat d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
+ span.array->z[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * depthMax);
+ }
+
+ /* write depth values */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ if (ctx->Visual.rgbMode) {
+ if (zoom)
+ _swrast_write_zoomed_rgba_span( ctx, &span,
+ (const GLchan (*)[4])span.array->rgba, desty, 0 );
+ else
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ else {
+ if (zoom)
+ _swrast_write_zoomed_index_span( ctx, &span, desty, 0 );
+ else
+ _swrast_write_index_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_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLint sy, dy, stepy;
+ GLint j;
+ GLstencil *p, *tmpImage;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset;
+ GLint overlapping;
+
+ if (!ctx->Visual.stencilBits) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
+ return;
+ }
+
+ if (!rb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ /* Determine if copy should be bottom-to-top or top-to-bottom */
+ if (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 (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
+ 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 );
+ }
+
+ /* Apply shift, offset, look-up table */
+ if (shift_or_offset) {
+ _mesa_shift_and_offset_stencil( ctx, width, stencil );
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ _mesa_map_stencil( ctx, width, stencil );
+ }
+
+ /* Write stencil values */
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span( ctx, width, destx, dy,
+ stencil, desty, 0 );
+ }
+ else {
+ _swrast_write_stencil_span( ctx, width, destx, dy, stencil );
+ }
+ }
+
+ if (overlapping)
+ FREE(tmpImage);
+}
+
+
+
+void
+_swrast_CopyPixels( GLcontext *ctx,
+ GLint srcx, GLint srcy, GLsizei width, GLsizei height,
+ GLint destx, GLint desty,
+ GLenum type )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ RENDER_START(swrast,ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (type == GL_COLOR && ctx->Visual.rgbMode) {
+ copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ else if (type == GL_COLOR && !ctx->Visual.rgbMode) {
+ copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ else if (type == GL_DEPTH) {
+ copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ else if (type == GL_STENCIL) {
+ copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ else {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glCopyPixels" );
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.c
new file mode 100644
index 000000000..b9d7d8949
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.c
@@ -0,0 +1,1365 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "imports.h"
+#include "fbobject.h"
+
+#include "s_depth.h"
+#include "s_context.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:
+ _mesa_bzero(mask, 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:
+ _mesa_bzero(mask, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in depth_test_span32");
+ }
+
+ return passed;
+}
+
+
+
+/*
+ * Apply depth test to span of fragments.
+ */
+static GLuint
+depth_test_span( GLcontext *ctx, struct sw_span *span)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ 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 (ctx->DrawBuffer->Visual.depthBits <= 16) {
+ 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);
+ 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, NULL);
+ }
+ 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, NULL);
+ }
+ }
+
+ 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 */
+ _mesa_bzero(mask, 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 */
+ _mesa_bzero(mask, n * sizeof(GLubyte));
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth func in direct_depth_test_pixels");
+ }
+}
+
+
+
+
+static GLuint
+depth_test_pixels( GLcontext *ctx, struct sw_span *span )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ 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;
+ 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, NULL);
+ }
+ 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, NULL);
+ }
+ }
+
+ 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, struct sw_span *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, struct sw_span *span )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ 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 = 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;
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, count, span->array->x, span->array->y,
+ zbuffer32, sizeof(GLuint));
+ zbuffer = zbuffer32;
+ }
+ else {
+ zbuffer = 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 depth buffer.
+ * This function does clipping before calling the device driver function.
+ *
+ * XXXX this is no longer a swrast function!!!
+ *
+ */
+void
+_swrast_read_depth_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLuint depth[] )
+{
+ if (y < 0 || y >= (GLint) rb->Height ||
+ x + (GLint) n <= 0 || x >= (GLint) rb->Width) {
+ /* span is completely outside framebuffer */
+ GLint i;
+ for (i = 0; i < n; i++)
+ depth[i] = 0;
+ 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;
+ }
+
+ /* we'll always return 32-bit values to our caller */
+ if (!rb) {
+ _mesa_bzero(depth, n * sizeof(GLuint));
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ rb->GetRow(ctx, rb, n, x, y, depth);
+ }
+ else {
+ GLushort temp[MAX_WIDTH];
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ rb->GetRow(ctx, rb, n, x, y, temp);
+ for (i = 0; i < n; i++) {
+ depth[i] = temp[i];
+ }
+ }
+}
+
+
+/**
+ * Return a span of depth values from the depth buffer as floats in [0,1].
+ * Input: n - how many pixels
+ * x,y - location of first pixel
+ * Output: depth - the array of depth values
+ */
+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;
+ GLuint temp[MAX_WIDTH];
+ GLint i;
+
+ assert(n <= MAX_WIDTH);
+
+ _swrast_read_depth_span(ctx, rb, n, x, y, temp);
+ for (i = 0; i < n; i++) {
+ depth[i] = temp[i] * scale;
+ }
+}
+
+
+/**
+ * Clear the depth buffer.
+ */
+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 (width == rb->Width &&
+ (clearValue & 0xff) == ((clearValue >> 8) & 0xff)) {
+ /* optimized case */
+ GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y);
+ GLuint len = width * height * sizeof(GLushort);
+ _mesa_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 clearRow[MAX_WIDTH];
+ GLint i, j;
+ for (j = 0; j < width; j++) {
+ clearRow[j] = clearValue;
+ }
+ for (i = 0; i < height; i++) {
+ rb->PutRow(ctx, rb, width, x, y + i, clearRow, NULL);
+ }
+ }
+ else {
+ GLuint clearRow[MAX_WIDTH];
+ GLint i, j;
+ assert(rb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < width; j++) {
+ clearRow[j] = clearValue;
+ }
+ for (i = 0; i < height; i++) {
+ rb->PutRow(ctx, rb, width, x, y + i, clearRow, NULL);
+ }
+ }
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.h
new file mode 100644
index 000000000..2229e8a22
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_depth.h
@@ -0,0 +1,56 @@
+/*
+ * 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_DEPTH_H
+#define S_DEPTH_H
+
+
+#include "mtypes.h"
+#include "s_context.h"
+
+
+extern GLuint
+_swrast_depth_test_span( GLcontext *ctx, struct sw_span *span);
+
+
+extern GLboolean
+_swrast_depth_bounds_test( GLcontext *ctx, struct sw_span *span );
+
+
+extern void
+_swrast_read_depth_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLuint depth[] );
+
+
+extern void
+_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLfloat depth[] );
+
+
+extern void
+_swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
new file mode 100644
index 000000000..b6aa77757
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
@@ -0,0 +1,1007 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "context.h"
+#include "convolve.h"
+#include "image.h"
+#include "macros.h"
+#include "imports.h"
+#include "pixel.h"
+
+#include "s_context.h"
+#include "s_drawpix.h"
+#include "s_pixeltex.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_pixels(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);
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (!ctx->Current.RasterPosValid) {
+ return GL_TRUE; /* no-op */
+ }
+
+ if (swrast->_RasterMask & MULTI_DRAW_BIT)
+ return GL_FALSE;
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if ((SWRAST_CONTEXT(ctx)->_RasterMask & ~CLIP_BIT) == 0
+ && ctx->Texture._EnabledCoordUnits == 0
+ && unpack->Alignment == 1
+ && !unpack->SwapBytes
+ && !unpack->LsbFirst) {
+
+ GLint destX = x;
+ GLint destY = y;
+ GLint drawWidth = width; /* actual width drawn */
+ GLint drawHeight = height; /* actual height drawn */
+ GLint skipPixels = unpack->SkipPixels;
+ GLint skipRows = unpack->SkipRows;
+ GLint rowLength;
+ GLint zoomY0 = 0;
+
+ if (unpack->RowLength > 0)
+ rowLength = unpack->RowLength;
+ else
+ rowLength = width;
+
+ /* If we're not using pixel zoom then do all clipping calculations
+ * now. Otherwise, we'll let the _swrast_write_zoomed_*_span() functions
+ * handle the clipping.
+ */
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* horizontal clipping */
+ if (destX < ctx->DrawBuffer->_Xmin) {
+ skipPixels += (ctx->DrawBuffer->_Xmin - destX);
+ drawWidth -= (ctx->DrawBuffer->_Xmin - destX);
+ destX = ctx->DrawBuffer->_Xmin;
+ }
+ if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
+ drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
+ if (drawWidth <= 0)
+ return GL_TRUE;
+
+ /* vertical clipping */
+ if (destY < ctx->DrawBuffer->_Ymin) {
+ skipRows += (ctx->DrawBuffer->_Ymin - destY);
+ drawHeight -= (ctx->DrawBuffer->_Ymin - destY);
+ destY = ctx->DrawBuffer->_Ymin;
+ }
+ if (destY + drawHeight > ctx->DrawBuffer->_Ymax)
+ drawHeight -= (destY + drawHeight - ctx->DrawBuffer->_Ymax);
+ if (drawHeight <= 0)
+ return GL_TRUE;
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down image */
+ /* horizontal clipping */
+ if (destX < ctx->DrawBuffer->_Xmin) {
+ skipPixels += (ctx->DrawBuffer->_Xmin - destX);
+ drawWidth -= (ctx->DrawBuffer->_Xmin - destX);
+ destX = ctx->DrawBuffer->_Xmin;
+ }
+ if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
+ drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
+ if (drawWidth <= 0)
+ return GL_TRUE;
+
+ /* vertical clipping */
+ if (destY > ctx->DrawBuffer->_Ymax) {
+ skipRows += (destY - ctx->DrawBuffer->_Ymax);
+ drawHeight -= (destY - ctx->DrawBuffer->_Ymax);
+ destY = ctx->DrawBuffer->_Ymax;
+ }
+ if (destY - drawHeight < ctx->DrawBuffer->_Ymin)
+ drawHeight -= (ctx->DrawBuffer->_Ymin - (destY - drawHeight));
+ if (drawHeight <= 0)
+ return GL_TRUE;
+ }
+ else {
+ if (drawWidth > MAX_WIDTH)
+ return GL_FALSE; /* fall back to general case path */
+
+ /* save Y value of first row */
+ zoomY0 = IROUND(ctx->Current.RasterPos[1]);
+ }
+
+
+ /*
+ * Ready to draw!
+ * The window region at (destX, destY) of size (drawWidth, drawHeight)
+ * will be written to.
+ * We'll take pixel data from buffer pointed to by "pixels" but we'll
+ * skip "skipRows" rows and skip "skipPixels" pixels/row.
+ */
+
+ if (format == GL_RGBA && type == CHAN_TYPE
+ && ctx->_ImageTransferState==0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels) * 4;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 4;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 4;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) src, zoomY0, 0);
+ src += rowLength * 4;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_RGB && type == CHAN_TYPE
+ && ctx->_ImageTransferState == 0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels) * 3;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 3;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ destY--;
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 3;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) src, zoomY0, 0);
+ src += rowLength * 3;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_LUMINANCE && type == CHAN_TYPE
+ && ctx->_ImageTransferState==0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels);
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY,
+ span.array->rgb, NULL);
+ src += rowLength;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgb, NULL);
+ src += rowLength;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) span.array->rgb, zoomY0, 0);
+ src += rowLength;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE
+ && ctx->_ImageTransferState == 0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels)*2;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ 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 += rowLength*2;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ 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++;
+ }
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength*2;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ 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, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ src += rowLength*2;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format==GL_COLOR_INDEX && type==GL_UNSIGNED_BYTE) {
+ GLubyte *src = (GLubyte *) pixels + skipRows * rowLength + skipPixels;
+ if (ctx->Visual.rgbMode) {
+ /* convert CI data to RGBA */
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength;
+ }
+ return GL_TRUE;
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ }
+ else if (ctx->_ImageTransferState==0) {
+ /* write CI data to CI frame buffer */
+ GLint row;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ for (row=0; row<drawHeight; row++) {
+ GLuint index32[MAX_WIDTH];
+ GLint col;
+ for (col = 0; col < drawWidth; col++)
+ index32[col] = src[col];
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, index32, NULL);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ else {
+ /* with zooming */
+ return GL_FALSE;
+ }
+ }
+ }
+ else {
+ /* can't handle this pixel format and/or data type here */
+ return GL_FALSE;
+ }
+ }
+
+ /* can't do a simple draw, have to use slow path */
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Draw color index image.
+ */
+static void
+draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ GLint row, skipPixels;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+ /*
+ * General solution
+ */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(spanEnd <= MAX_WIDTH);
+ for (row = 0; row < height; row++, spanY++) {
+ const GLvoid *source = _mesa_image_address2d(unpack, pixels,
+ width, height,
+ GL_COLOR_INDEX, type,
+ row, skipPixels);
+ _mesa_unpack_index_span(ctx, spanEnd, GL_UNSIGNED_INT,
+ span.array->index, type, source, unpack,
+ ctx->_ImageTransferState);
+
+ /* These may get changed during writing/clipping */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
+ if (zoom)
+ _swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
+ else
+ _swrast_write_index_span(ctx, &span);
+ }
+ skipPixels += spanEnd;
+ }
+}
+
+
+
+/*
+ * 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;
+ const GLint desty = y;
+ GLint row, skipPixels;
+
+ if (type != GL_BYTE &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_SHORT &&
+ type != GL_UNSIGNED_SHORT &&
+ type != GL_INT &&
+ type != GL_UNSIGNED_INT &&
+ type != GL_FLOAT &&
+ type != GL_BITMAP) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(stencil type)");
+ return;
+ }
+
+ if (ctx->Visual.stencilBits == 0) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glDrawPixels(no stencil buffer)");
+ return;
+ }
+
+ /* if width > MAX_WIDTH, have to process image in chunks */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x;
+ GLint spanY = y;
+ const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+
+ for (row = 0; row < height; row++, spanY++) {
+ 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_index_span(ctx, spanWidth, destType, values,
+ type, source, unpack,
+ ctx->_ImageTransferState);
+ if (ctx->_ImageTransferState & IMAGE_SHIFT_OFFSET_BIT) {
+ _mesa_shift_and_offset_stencil(ctx, spanWidth, values);
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ _mesa_map_stencil(ctx, spanWidth, values);
+ }
+
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
+ spanX, spanY, values, desty, 0);
+ }
+ 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 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLboolean bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ const GLint desty = y;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
+
+ if (type != GL_BYTE
+ && type != GL_UNSIGNED_BYTE
+ && type != GL_SHORT
+ && type != GL_UNSIGNED_SHORT
+ && type != GL_INT
+ && type != GL_UNSIGNED_INT
+ && type != GL_FLOAT) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(type)");
+ return;
+ }
+
+ _swrast_span_default_color(ctx, &span);
+
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if (type == GL_UNSIGNED_SHORT
+ && ctx->Visual.depthBits == 16
+ && !bias_or_scale
+ && !zoom
+ && ctx->Visual.rgbMode
+ && width <= MAX_WIDTH) {
+ /* Special case: directly write 16-bit depth values */
+ GLint row, spanY = y;
+ for (row = 0; row < height; row++, spanY++) {
+ 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 = spanY;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT
+ && sizeof(GLdepth) == 4
+ && !bias_or_scale
+ && !zoom
+ && ctx->Visual.rgbMode
+ && width <= MAX_WIDTH) {
+ /* Special case: shift 32-bit values down to ctx->Visual.depthBits */
+ const GLint shift = 32 - ctx->Visual.depthBits;
+ GLint row, spanY = y;
+ for (row = 0; row < height; row++, spanY++) {
+ 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(GLdepth));
+ }
+ else {
+ GLint col;
+ for (col = 0; col < width; col++)
+ span.array->z[col] = zSrc[col] >> shift;
+ }
+ span.x = x;
+ span.y = spanY;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else {
+ /* General case */
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+ GLint row, skipPixels = 0;
+
+ /* in case width > MAX_WIDTH do the copy in chunks */
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(span.end <= MAX_WIDTH);
+ for (row = 0; row < height; row++, spanY++) {
+ GLfloat floatSpan[MAX_WIDTH];
+ 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 = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
+ _mesa_unpack_depth_span(ctx, span.end, floatSpan, type,
+ zSrc, unpack);
+ /* clamp depth values to [0,1] and convert from floats to ints */
+ {
+ GLuint i;
+ for (i = 0; i < span.end; i++) {
+ span.array->z[i] = (GLdepth) (floatSpan[i] * depthMax);
+ }
+ }
+ if (zoom) {
+ _swrast_write_zoomed_depth_span(ctx, &span, desty, skipPixels);
+ }
+ else if (ctx->Visual.rgbMode) {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ else {
+ _swrast_write_index_span(ctx, &span);
+ }
+ }
+ skipPixels += spanEnd;
+ }
+ }
+}
+
+
+
+/*
+ * 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 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb = NULL; /* only used for quickDraw path */
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ const GLint desty = y;
+ GLboolean quickDraw;
+ GLfloat *convImage = NULL;
+ GLuint transferOps = ctx->_ImageTransferState;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(format or type)");
+ return;
+ }
+
+ /* Try an optimized glDrawPixels first */
+ if (fast_draw_pixels(ctx, x, y, width, height, format, type, unpack, pixels))
+ return;
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 && !zoom && x >= 0 && y >= 0
+ && x + width <= (GLint) ctx->DrawBuffer->Width
+ && y + height <= (GLint) ctx->DrawBuffer->Height
+ && ctx->DrawBuffer->_NumColorDrawBuffers[0] == 1) {
+ quickDraw = GL_TRUE;
+ rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ }
+ else {
+ quickDraw = GL_FALSE;
+ rb = NULL;
+ }
+
+ 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 *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!tmpImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
+ return;
+ }
+ convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!convImage) {
+ _mesa_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);
+ }
+ _mesa_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;
+ }
+
+ /*
+ * General solution
+ */
+ {
+ const GLuint interpMask = span.interpMask;
+ const GLuint arrayMask = span.arrayMask;
+ GLint row, skipPixels = 0;
+
+ /* if the span is wider than MAX_WIDTH we have to do it in chunks */
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(span.end <= MAX_WIDTH);
+
+ for (row = 0; row < height; row++, spanY++) {
+ const GLvoid *source = _mesa_image_address2d(unpack,
+ pixels, width, height, format, type, row, skipPixels);
+
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+ span.arrayMask = arrayMask;
+ span.interpMask = interpMask;
+
+ _mesa_unpack_color_span_chan(ctx, span.end, GL_RGBA,
+ (GLchan *) span.array->rgba,
+ format, type, source, unpack,
+ transferOps);
+
+ if ((ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) ||
+ (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink))
+ continue;
+
+ if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
+ _swrast_pixel_texture(ctx, &span);
+ }
+
+ /* draw the span */
+ if (quickDraw) {
+ rb->PutRow(ctx, rb, span.end, span.x, span.y,
+ span.array->rgba, NULL);
+ }
+ else if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, desty, skipPixels);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+
+ skipPixels += spanEnd;
+ }
+ }
+
+ if (convImage) {
+ _mesa_free(convImage);
+ }
+}
+
+
+
+/*
+ * Execute glDrawPixels
+ */
+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);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (unpack->BufferObj->Name) {
+ /* unpack from PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
+ format, type, pixels)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawPixels(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ GL_READ_ONLY_ARB,
+ unpack->BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(PBO is mapped)");
+ return;
+ }
+ pixels = ADD_POINTERS(buf, pixels);
+ }
+
+ RENDER_START(swrast,ctx);
+
+ 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:
+ if (ctx->Visual.rgbMode)
+ draw_rgba_pixels(ctx, x,y, width, height, format, type, unpack, pixels);
+ else
+ draw_index_pixels(ctx, x, y, width, height, type, unpack, pixels);
+ break;
+ 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;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(format)" );
+ /* don't return yet, clean-up */
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ if (unpack->BufferObj->Name) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ unpack->BufferObj);
+ }
+}
+
+
+
+#if 0 /* experimental */
+/*
+ * Execute glDrawDepthPixelsMESA().
+ */
+void
+_swrast_DrawDepthPixelsMESA( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum colorFormat, GLenum colorType,
+ const GLvoid *colors,
+ GLenum depthType, const GLvoid *depths,
+ const struct gl_pixelstore_attrib *unpack )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ RENDER_START(swrast,ctx);
+
+ switch (colorFormat) {
+ case GL_COLOR_INDEX:
+ if (ctx->Visual.rgbMode)
+ draw_rgba_pixels(ctx, x,y, width, height, colorFormat, colorType, unpack, colors);
+ else
+ draw_index_pixels(ctx, x, y, width, height, colorType, unpack, colors);
+ break;
+ 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, colorFormat, colorType, unpack, colors);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glDrawDepthPixelsMESA(colorFormat)" );
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.h
new file mode 100644
index 000000000..66067115d
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.h
@@ -0,0 +1,36 @@
+
+/*
+ * 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_DRAWPIXELS_H
+#define S_DRAWPIXELS_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+/* XXX kill this header? */
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.c
new file mode 100644
index 000000000..26cb05cd5
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.c
@@ -0,0 +1,161 @@
+/*
+ * 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.
+ */
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "enums.h"
+#include "feedback.h"
+#include "macros.h"
+
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_triangle.h"
+
+
+#define FB_3D 0x01
+#define FB_4D 0x02
+#define FB_INDEX 0x04
+#define FB_COLOR 0x08
+#define FB_TEXTURE 0X10
+
+
+
+
+static void feedback_vertex( GLcontext *ctx,
+ const SWvertex *v, const SWvertex *pv )
+{
+ const GLuint texUnit = 0; /* See section 5.3 of 1.2.1 spec */
+ GLfloat win[4];
+ GLfloat color[4];
+ GLfloat tc[4];
+
+ win[0] = v->win[0];
+ win[1] = v->win[1];
+ win[2] = v->win[2] / ctx->DrawBuffer->_DepthMaxF;
+ win[3] = 1.0F / v->win[3];
+
+ color[0] = CHAN_TO_FLOAT(pv->color[0]);
+ color[1] = CHAN_TO_FLOAT(pv->color[1]);
+ color[2] = CHAN_TO_FLOAT(pv->color[2]);
+ color[3] = CHAN_TO_FLOAT(pv->color[3]);
+
+ if (v->texcoord[texUnit][3] != 1.0 &&
+ v->texcoord[texUnit][3] != 0.0) {
+ GLfloat invq = 1.0F / v->texcoord[texUnit][3];
+ tc[0] = v->texcoord[texUnit][0] * invq;
+ tc[1] = v->texcoord[texUnit][1] * invq;
+ tc[2] = v->texcoord[texUnit][2] * invq;
+ tc[3] = v->texcoord[texUnit][3];
+ }
+ else {
+ COPY_4V(tc, v->texcoord[texUnit]);
+ }
+
+ _mesa_feedback_vertex( ctx, win, color, (GLfloat) v->index, tc );
+}
+
+
+/*
+ * 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 )) {
+ FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN );
+ 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;
+
+ 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 )
+{
+ 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->win[2] * zs );
+ _mesa_update_hitflag( ctx, v1->win[2] * zs );
+ _mesa_update_hitflag( ctx, v2->win[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->win[2] * zs );
+ _mesa_update_hitflag( ctx, v1->win[2] * zs );
+}
+
+
+void _swrast_select_point( GLcontext *ctx, const SWvertex *v )
+{
+ const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+ _mesa_update_hitflag( ctx, v->win[2] * zs );
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.h
new file mode 100644
index 000000000..73f45c10b
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_feedback.h
@@ -0,0 +1,51 @@
+
+/*
+ * 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 "mtypes.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
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c
new file mode 100644
index 000000000..0af9cd8f2
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c
@@ -0,0 +1,327 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "macros.h"
+
+#include "s_context.h"
+#include "s_fog.h"
+#include "s_span.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 = (GLfloat) exp(-d * z);
+ f = CLAMP(f, 0.0F, 1.0F);
+ return f;
+ case GL_EXP2:
+ d = ctx->Fog.Density;
+ f = (GLfloat) exp(-(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;
+ }
+}
+
+
+/**
+ * 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, struct sw_span *span )
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLchan rFog = swrast->_FogColor[RCOMP];
+ const GLchan gFog = swrast->_FogColor[GCOMP];
+ const GLchan bFog = swrast->_FogColor[BCOMP];
+ const GLuint haveW = (span->interpMask & SPAN_W);
+ GLchan (*rgba)[4] = (GLchan (*)[4]) span->array->rgba;
+
+ ASSERT(swrast->_FogEnabled);
+ ASSERT((span->interpMask | span->arrayMask) & SPAN_FOG);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ /* NOTE: if haveW is true, that means the fog start/step values are
+ * perspective-corrected and we have to divide each fog coord by W.
+ */
+
+ /* we need to compute fog blend factors */
+ 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);
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat f, oneMinusF;
+ f = (fogEnd - FABSF(fogCoord) / w) * fogScale;
+ f = CLAMP(f, 0.0F, 1.0F);
+ oneMinusF = 1.0F - f;
+ rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
+ rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
+ rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ case GL_EXP:
+ {
+ const GLfloat density = -ctx->Fog.Density;
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat f, oneMinusF;
+ f = (GLfloat) exp(density * FABSF(fogCoord) / w);
+ f = CLAMP(f, 0.0F, 1.0F);
+ oneMinusF = 1.0F - f;
+ rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
+ rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
+ rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ case GL_EXP2:
+ {
+ const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat coord = fogCoord / w;
+ GLfloat tmp = negDensitySquared * coord * coord;
+ GLfloat f, oneMinusF;
+#if defined(__alpha__) || defined(__alpha)
+ /* XXX this underflow check may be needed for other systems*/
+ if (tmp < FLT_MIN_10_EXP)
+ tmp = FLT_MIN_10_EXP;
+#endif
+ f = (GLfloat) exp(tmp);
+ f = CLAMP(f, 0.0F, 1.0F);
+ oneMinusF = 1.0F - f;
+ rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
+ rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
+ rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
+ return;
+ }
+ }
+ else if (span->arrayMask & SPAN_FOG) {
+ /* The span's fog array values are blend factors.
+ * They were previously computed per-vertex.
+ */
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat f = span->array->fog[i];
+ const GLfloat oneMinusF = 1.0F - f;
+ rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
+ rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
+ rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
+ }
+ }
+ else {
+ /* The span's fog start/step values are blend factors.
+ * They were previously computed per-vertex.
+ */
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fog = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ ASSERT(span->interpMask & SPAN_FOG);
+ for (i = 0; i < span->end; i++) {
+ const GLfloat fact = fog / w;
+ const GLfloat oneMinusF = 1.0F - fact;
+ rgba[i][RCOMP] = (GLchan) (fact * rgba[i][RCOMP] + oneMinusF * rFog);
+ rgba[i][GCOMP] = (GLchan) (fact * rgba[i][GCOMP] + oneMinusF * gFog);
+ rgba[i][BCOMP] = (GLchan) (fact * rgba[i][BCOMP] + oneMinusF * bFog);
+ fog += fogStep;
+ w += wStep;
+ }
+ }
+}
+
+
+/**
+ * As above, but color index mode.
+ */
+void
+_swrast_fog_ci_span( const GLcontext *ctx, struct sw_span *span )
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLuint haveW = (span->interpMask & SPAN_W);
+ const GLuint fogIndex = (GLuint) ctx->Fog.Index;
+ GLuint *index = span->array->index;
+
+ ASSERT(swrast->_FogEnabled);
+ ASSERT(span->arrayMask & SPAN_INDEX);
+ ASSERT((span->interpMask | span->arrayMask) & SPAN_FOG);
+
+ /* we need to compute fog blend factors */
+ 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 (ctx->Fog.Mode) {
+ 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);
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat f = (fogEnd - fogCoord / w) * fogScale;
+ f = CLAMP(f, 0.0F, 1.0F);
+ index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ case GL_EXP:
+ {
+ const GLfloat density = -ctx->Fog.Density;
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ GLfloat f = (GLfloat) exp(density * fogCoord / w);
+ f = CLAMP(f, 0.0F, 1.0F);
+ index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ case GL_EXP2:
+ {
+ const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat coord = fogCoord / w;
+ GLfloat tmp = negDensitySquared * coord * coord;
+ GLfloat f;
+#if defined(__alpha__) || defined(__alpha)
+ /* XXX this underflow check may be needed for other systems*/
+ if (tmp < FLT_MIN_10_EXP)
+ tmp = FLT_MIN_10_EXP;
+#endif
+ f = (GLfloat) exp(tmp);
+ f = CLAMP(f, 0.0F, 1.0F);
+ index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_fog_ci_span");
+ return;
+ }
+ }
+ else if (span->arrayMask & SPAN_FOG) {
+ /* The span's fog array values are blend factors.
+ * They were previously computed per-vertex.
+ */
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ const GLfloat f = span->array->fog[i];
+ index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
+ }
+ }
+ else {
+ /* The span's fog start/step values are blend factors.
+ * They were previously computed per-vertex.
+ */
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fog = span->fog;
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ ASSERT(span->interpMask & SPAN_FOG);
+ for (i = 0; i < span->end; i++) {
+ const GLfloat f = fog / w;
+ index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
+ fog += fogStep;
+ w += wStep;
+ }
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.h
new file mode 100644
index 000000000..f5744b1d9
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.h
@@ -0,0 +1,45 @@
+
+/*
+ * 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 "mtypes.h"
+#include "swrast.h"
+
+
+extern GLfloat
+_swrast_z_to_fogfactor(GLcontext *ctx, GLfloat z);
+
+extern void
+_swrast_fog_rgba_span( const GLcontext *ctx, struct sw_span *span );
+
+extern void
+_swrast_fog_ci_span( const GLcontext *ctx, struct sw_span *span );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_fragprog_to_c.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_fragprog_to_c.c
new file mode 100644
index 000000000..1953e8c73
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_fragprog_to_c.c
@@ -0,0 +1,822 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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.
+ */
+
+/* An amusing little utility to print ARB fragment programs out as a C
+ * function. Resulting code not tested except visually.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "nvfragprog.h"
+#include "macros.h"
+#include "program.h"
+
+#include "s_nvfragprog.h"
+#include "s_span.h"
+#include "s_texture.h"
+
+
+#ifdef USE_TCC
+
+/* UREG - a way of representing an FP source register including
+ * swizzling and negation in a single GLuint. Major flaw is the
+ * limitiation to source->Index < 32. Secondary flaw is the fact that
+ * it's overkill & we could probably just pass around the original
+ * datatypes instead.
+ */
+
+#define UREG_TYPE_TEMP 0
+#define UREG_TYPE_INTERP 1
+#define UREG_TYPE_LOCAL_CONST 2
+#define UREG_TYPE_ENV_CONST 3
+#define UREG_TYPE_STATE_CONST 4
+#define UREG_TYPE_PARAM 5
+#define UREG_TYPE_OUTPUT 6
+#define UREG_TYPE_MASK 0x7
+
+#define UREG_TYPE_SHIFT 29
+#define UREG_NR_SHIFT 24
+#define UREG_NR_MASK 0x1f /* 31 */
+#define UREG_CHANNEL_X_NEGATE_SHIFT 23
+#define UREG_CHANNEL_X_SHIFT 20
+#define UREG_CHANNEL_Y_NEGATE_SHIFT 19
+#define UREG_CHANNEL_Y_SHIFT 16
+#define UREG_CHANNEL_Z_NEGATE_SHIFT 15
+#define UREG_CHANNEL_Z_SHIFT 12
+#define UREG_CHANNEL_W_NEGATE_SHIFT 11
+#define UREG_CHANNEL_W_SHIFT 8
+#define UREG_CHANNEL_ZERO_NEGATE_MBZ 5
+#define UREG_CHANNEL_ZERO_SHIFT 4
+#define UREG_CHANNEL_ONE_NEGATE_MBZ 1
+#define UREG_CHANNEL_ONE_SHIFT 0
+
+#define UREG_BAD 0xffffffff /* not a valid ureg */
+
+#define _X 0
+#define _Y 1
+#define _Z 2
+#define _W 3
+#define _ZERO 4 /* NOTE! */
+#define _ONE 5 /* NOTE! */
+
+
+/* Construct a ureg:
+ */
+#define UREG( type, nr ) (((type)<< UREG_TYPE_SHIFT) | \
+ ((nr) << UREG_NR_SHIFT) | \
+ (_X << UREG_CHANNEL_X_SHIFT) | \
+ (_Y << UREG_CHANNEL_Y_SHIFT) | \
+ (_Z << UREG_CHANNEL_Z_SHIFT) | \
+ (_W << UREG_CHANNEL_W_SHIFT) | \
+ (_ZERO << UREG_CHANNEL_ZERO_SHIFT) | \
+ (_ONE << UREG_CHANNEL_ONE_SHIFT))
+
+#define GET_CHANNEL_SRC( reg, channel ) ((reg<<(channel*4)) & \
+ (0xf<<UREG_CHANNEL_X_SHIFT))
+#define CHANNEL_SRC( src, channel ) (src>>(channel*4))
+
+#define GET_UREG_TYPE(reg) (((reg)>>UREG_TYPE_SHIFT)&UREG_TYPE_MASK)
+#define GET_UREG_NR(reg) (((reg)>>UREG_NR_SHIFT)&UREG_NR_MASK)
+
+
+
+#define UREG_XYZW_CHANNEL_MASK 0x00ffff00
+
+#define deref(reg,pos) swizzle(reg, pos, pos, pos, pos)
+
+
+static INLINE int is_swizzled( int reg )
+{
+ return ((reg & UREG_XYZW_CHANNEL_MASK) !=
+ (UREG(0,0) & UREG_XYZW_CHANNEL_MASK));
+}
+
+
+/* One neat thing about the UREG representation:
+ */
+static INLINE int swizzle( int reg, int x, int y, int z, int w )
+{
+ return ((reg & ~UREG_XYZW_CHANNEL_MASK) |
+ CHANNEL_SRC( GET_CHANNEL_SRC( reg, x ), 0 ) |
+ CHANNEL_SRC( GET_CHANNEL_SRC( reg, y ), 1 ) |
+ CHANNEL_SRC( GET_CHANNEL_SRC( reg, z ), 2 ) |
+ CHANNEL_SRC( GET_CHANNEL_SRC( reg, w ), 3 ));
+}
+
+/* Another neat thing about the UREG representation:
+ */
+static INLINE int negate( int reg, int x, int y, int z, int w )
+{
+ return reg ^ (((x&1)<<UREG_CHANNEL_X_NEGATE_SHIFT)|
+ ((y&1)<<UREG_CHANNEL_Y_NEGATE_SHIFT)|
+ ((z&1)<<UREG_CHANNEL_Z_NEGATE_SHIFT)|
+ ((w&1)<<UREG_CHANNEL_W_NEGATE_SHIFT));
+}
+
+
+
+static GLuint src_reg_file( GLuint file )
+{
+ switch (file) {
+ case PROGRAM_TEMPORARY: return UREG_TYPE_TEMP;
+ case PROGRAM_INPUT: return UREG_TYPE_INTERP;
+ case PROGRAM_LOCAL_PARAM: return UREG_TYPE_LOCAL_CONST;
+ case PROGRAM_ENV_PARAM: return UREG_TYPE_ENV_CONST;
+
+ case PROGRAM_STATE_VAR: return UREG_TYPE_STATE_CONST;
+ case PROGRAM_NAMED_PARAM: return UREG_TYPE_PARAM;
+ default: return UREG_BAD;
+ }
+}
+
+static void emit( struct fragment_program *p,
+ const char *fmt,
+ ... )
+{
+ va_list ap;
+ va_start( ap, fmt );
+
+ if (p->c_strlen < sizeof(p->c_str))
+ p->c_strlen += vsnprintf( p->c_str + p->c_strlen,
+ sizeof(p->c_str) - p->c_strlen,
+ fmt, ap );
+
+ va_end( ap );
+}
+
+static INLINE void emit_char( struct fragment_program *p, char c )
+{
+ if (p->c_strlen < sizeof(p->c_str)) {
+ p->c_str[p->c_strlen] = c;
+ p->c_strlen++;
+ }
+}
+
+
+/**
+ * Retrieve a ureg for the given source register. Will emit
+ * constants, apply swizzling and negation as needed.
+ */
+static GLuint src_vector( const struct fp_src_register *source )
+{
+ GLuint src;
+
+ assert(source->Index < 32); /* limitiation of UREG representation */
+
+ src = UREG( src_reg_file( source->File ), source->Index );
+
+ src = swizzle(src,
+ _X + source->Swizzle[0],
+ _X + source->Swizzle[1],
+ _X + source->Swizzle[2],
+ _X + source->Swizzle[3]);
+
+ if (source->NegateBase)
+ src = negate( src, 1,1,1,1 );
+
+ return src;
+}
+
+
+static void print_header( struct fragment_program *p )
+{
+ emit(p, "\n\n\n");
+
+ /* Mesa's program_parameter struct:
+ */
+ emit(p,
+ "struct program_parameter\n"
+ "{\n"
+ " const char *Name;\n"
+ " int Type;\n"
+ " int StateIndexes[6];\n"
+ " float Values[4];\n"
+ "};\n");
+
+
+ /* Texture samplers, not written yet:
+ */
+ emit(p, "extern void TEX( void *ctx, const float *txc, int unit, float *rslt );\n"
+ "extern void TXB( void *ctx, const float *txc, int unit, float *rslt );\n"
+ "extern void TXP( void *ctx, const float *txc, int unit, float *rslt );\n");
+
+ /* Resort to the standard math library (float versions):
+ */
+ emit(p, "extern float fabsf( float );\n"
+ "extern float cosf( float );\n"
+ "extern float sinf( float );\n"
+ "extern float expf( float );\n"
+ "extern float powf( float, float );\n"
+ "extern float floorf( float );\n");
+
+ /* These ones we have fast code in Mesa for:
+ */
+ emit(p, "extern float LOG2( float );\n"
+ "extern float _mesa_inv_sqrtf( float );\n");
+
+ /* The usual macros, not really needed, but handy:
+ */
+ emit(p, "#define MIN2(x,y) ((x)<(y)?(x):(y))\n"
+ "#define MAX2(x,y) ((x)<(y)?(x):(y))\n"
+ "#define SATURATE(x) ((x)>1.0?1.0:((x)<0.0?0.0:(x)))\n");
+
+ /* Our function!
+ */
+ emit(p, "int run_program( void *ctx, \n"
+ " const float (*local_param)[4], \n"
+ " const float (*env_param)[4], \n"
+ " const struct program_parameter *state_param, \n"
+ " const float (*interp)[4], \n"
+ " float (*outputs)[4])\n"
+ "{\n"
+ " float temp[32][4];\n"
+ );
+}
+
+static void print_footer( struct fragment_program *p )
+{
+ emit(p, " return 1;");
+ emit(p, "}\n");
+}
+
+static void print_dest_reg( struct fragment_program *p,
+ const struct fp_instruction *inst )
+{
+ switch (inst->DstReg.File) {
+ case PROGRAM_OUTPUT:
+ emit(p, "outputs[%d]", inst->DstReg.Index);
+ break;
+ case PROGRAM_TEMPORARY:
+ emit(p, "temp[%d]", inst->DstReg.Index);
+ break;
+ default:
+ break;
+ }
+}
+
+static void print_dest( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ GLuint idx )
+{
+ print_dest_reg(p, inst);
+ emit(p, "[%d]", idx);
+}
+
+
+#define UREG_SRC0(reg) (((reg)>>UREG_CHANNEL_X_SHIFT) & 0x7)
+
+static void print_reg( struct fragment_program *p,
+ GLuint arg )
+{
+ switch (GET_UREG_TYPE(arg)) {
+ case UREG_TYPE_TEMP: emit(p, "temp"); break;
+ case UREG_TYPE_INTERP: emit(p, "interp"); break;
+ case UREG_TYPE_LOCAL_CONST: emit(p, "local_const"); break;
+ case UREG_TYPE_ENV_CONST: emit(p, "env_const"); break;
+ case UREG_TYPE_STATE_CONST: emit(p, "state_param"); break;
+ case UREG_TYPE_PARAM: emit(p, "local_param"); break;
+ };
+
+ emit(p, "[%d]", GET_UREG_NR(arg));
+
+ if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST) {
+ emit(p, ".Values");
+ }
+}
+
+
+static void print_arg( struct fragment_program *p,
+ GLuint arg )
+{
+ GLuint src = UREG_SRC0(arg);
+
+ if (src == _ZERO) {
+ emit(p, "0");
+ return;
+ }
+
+ if (arg & (1<<UREG_CHANNEL_X_NEGATE_SHIFT))
+ emit(p, "-");
+
+ if (src == _ONE) {
+ emit(p, "1");
+ return;
+ }
+
+ if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST &&
+ p->Parameters->Parameters[GET_UREG_NR(arg)].Type == CONSTANT) {
+ emit(p, "%g", p->Parameters->Parameters[GET_UREG_NR(arg)].Values[src]);
+ return;
+ }
+
+ print_reg( p, arg );
+
+ switch (src){
+ case _X: emit(p, "[0]"); break;
+ case _Y: emit(p, "[1]"); break;
+ case _Z: emit(p, "[2]"); break;
+ case _W: emit(p, "[3]"); break;
+ }
+}
+
+
+/* This is where the handling of expressions breaks down into string
+ * processing:
+ */
+static void print_expression( struct fragment_program *p,
+ GLuint i,
+ const char *fmt,
+ va_list ap )
+{
+ while (*fmt) {
+ if (*fmt == '%' && *(fmt+1) == 's') {
+ int reg = va_arg(ap, int);
+
+ /* Use of deref() is a bit of a hack:
+ */
+ print_arg( p, deref(reg, i) );
+ fmt += 2;
+ }
+ else {
+ emit_char(p, *fmt);
+ fmt++;
+ }
+ }
+
+ emit(p, ";\n");
+}
+
+static void do_tex_kill( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ GLuint arg )
+{
+ GLuint i;
+
+ emit(p, "if (");
+
+ for (i = 0; i < 4; i++) {
+ print_arg( p, deref(arg, i) );
+ emit(p, " < 0 ");
+ if (i + 1 < 4)
+ emit(p, "|| ");
+ }
+
+ emit(p, ")\n");
+ emit(p, " return 0;\n");
+
+}
+
+static void do_tex_simple( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ const char *fn, GLuint texunit, GLuint arg )
+{
+ emit(p, " %s( ctx, ", fn);
+ print_reg( p, arg );
+ emit(p, ", %d, ", texunit );
+ print_dest_reg(p, inst);
+ emit(p, ");\n");
+}
+
+
+static void do_tex( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ const char *fn, GLuint texunit, GLuint arg )
+{
+ GLuint i;
+ GLboolean need_tex = GL_FALSE, need_result = GL_FALSE;
+
+ for (i = 0; i < 4; i++)
+ if (!inst->DstReg.WriteMask[i])
+ need_result = GL_TRUE;
+
+ if (is_swizzled(arg))
+ need_tex = GL_TRUE;
+
+ if (!need_tex && !need_result) {
+ do_tex_simple( p, inst, fn, texunit, arg );
+ return;
+ }
+
+ emit(p, " {\n");
+ emit(p, " float texcoord[4];\n");
+ emit(p, " float result[4];\n");
+
+ for (i = 0; i < 4; i++) {
+ emit(p, " texcoord[%d] = ", i);
+ print_arg( p, deref(arg, i) );
+ emit(p, ";\n");
+ }
+
+ emit(p, " %s( ctx, texcoord, %d, result);\n", fn, texunit );
+
+ for (i = 0; i < 4; i++) {
+ if (inst->DstReg.WriteMask[i]) {
+ emit(p, " ");
+ print_dest(p, inst, i);
+ emit(p, " = result[%d];\n", i);
+ }
+ }
+
+ emit(p, " }\n");
+}
+
+
+static void saturate( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ GLuint i )
+{
+ emit(p, " ");
+ print_dest(p, inst, i);
+ emit(p, " = SATURATE( ");
+ print_dest(p, inst, i);
+ emit(p, ");\n");
+}
+
+static void assign_single( GLuint i,
+ struct fragment_program *p,
+ const struct fp_instruction *inst,
+ const char *fmt,
+ ... )
+{
+ va_list ap;
+ va_start( ap, fmt );
+
+ if (inst->DstReg.WriteMask[i]) {
+ emit(p, " ");
+ print_dest(p, inst, i);
+ emit(p, " = ");
+ print_expression( p, i, fmt, ap);
+ if (inst->Saturate)
+ saturate(p, inst, i);
+ }
+
+ va_end( ap );
+}
+
+static void assign4( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ const char *fmt,
+ ... )
+{
+ GLuint i;
+ va_list ap;
+ va_start( ap, fmt );
+
+ for (i = 0; i < 4; i++)
+ if (inst->DstReg.WriteMask[i]) {
+ emit(p, " ");
+ print_dest(p, inst, i);
+ emit(p, " = ");
+ print_expression( p, i, fmt, ap);
+ if (inst->Saturate)
+ saturate(p, inst, i);
+ }
+
+ va_end( ap );
+}
+
+static void assign4_replicate( struct fragment_program *p,
+ const struct fp_instruction *inst,
+ const char *fmt,
+ ... )
+{
+ GLuint i, first = 0;
+ GLboolean ok = 0;
+ va_list ap;
+
+ for (i = 0; i < 4; i++)
+ if (inst->DstReg.WriteMask[i]) {
+ ok = 1;
+ first = i;
+ break;
+ }
+
+ if (!ok) return;
+
+ va_start( ap, fmt );
+
+ emit(p, " ");
+
+ print_dest(p, inst, first);
+ emit(p, " = ");
+ print_expression( p, 0, fmt, ap);
+ if (inst->Saturate)
+ saturate(p, inst, first);
+ va_end( ap );
+
+ for (i = first+1; i < 4; i++)
+ if (inst->DstReg.WriteMask[i]) {
+ emit(p, " ");
+ print_dest(p, inst, i);
+ emit(p, " = ");
+ print_dest(p, inst, first);
+ emit(p, ";\n");
+ }
+}
+
+
+
+
+static GLuint nr_args( GLuint opcode )
+{
+ switch (opcode) {
+ case FP_OPCODE_ABS: return 1;
+ case FP_OPCODE_ADD: return 2;
+ case FP_OPCODE_CMP: return 3;
+ case FP_OPCODE_COS: return 1;
+ case FP_OPCODE_DP3: return 2;
+ case FP_OPCODE_DP4: return 2;
+ case FP_OPCODE_DPH: return 2;
+ case FP_OPCODE_DST: return 2;
+ case FP_OPCODE_EX2: return 1;
+ case FP_OPCODE_FLR: return 1;
+ case FP_OPCODE_FRC: return 1;
+ case FP_OPCODE_KIL: return 1;
+ case FP_OPCODE_LG2: return 1;
+ case FP_OPCODE_LIT: return 1;
+ case FP_OPCODE_LRP: return 3;
+ case FP_OPCODE_MAD: return 3;
+ case FP_OPCODE_MAX: return 2;
+ case FP_OPCODE_MIN: return 2;
+ case FP_OPCODE_MOV: return 1;
+ case FP_OPCODE_MUL: return 2;
+ case FP_OPCODE_POW: return 2;
+ case FP_OPCODE_RCP: return 1;
+ case FP_OPCODE_RSQ: return 1;
+ case FP_OPCODE_SCS: return 1;
+ case FP_OPCODE_SGE: return 2;
+ case FP_OPCODE_SIN: return 1;
+ case FP_OPCODE_SLT: return 2;
+ case FP_OPCODE_SUB: return 2;
+ case FP_OPCODE_SWZ: return 1;
+ case FP_OPCODE_TEX: return 1;
+ case FP_OPCODE_TXB: return 1;
+ case FP_OPCODE_TXP: return 1;
+ case FP_OPCODE_XPD: return 2;
+ default: return 0;
+ }
+}
+
+
+
+static void translate_program( struct fragment_program *p )
+{
+ const struct fp_instruction *inst = p->Instructions;
+
+ for (; inst->Opcode != FP_OPCODE_END; inst++) {
+
+ GLuint src[3], i;
+ GLuint nr = nr_args( inst->Opcode );
+
+ for (i = 0; i < nr; i++)
+ src[i] = src_vector( &inst->SrcReg[i] );
+
+ /* Print the original program instruction string */
+ if (p->Base.String)
+ {
+ const char *s = (const char *) p->Base.String + inst->StringPos;
+ emit(p, " /* ");
+ while (*s != ';') {
+ emit_char(p, *s);
+ s++;
+ }
+ emit(p, "; */\n");
+ }
+
+ switch (inst->Opcode) {
+ case FP_OPCODE_ABS:
+ assign4(p, inst, "fabsf(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_ADD:
+ assign4(p, inst, "%s + %s", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_CMP:
+ assign4(p, inst, "%s < 0.0F ? %s : %s", src[0], src[1], src[2]);
+ break;
+
+ case FP_OPCODE_COS:
+ assign4_replicate(p, inst, "COS(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_DP3:
+ assign4_replicate(p, inst,
+ "%s*%s + %s*%s + %s*%s",
+ deref(src[0],_X),
+ deref(src[1],_X),
+ deref(src[0],_Y),
+ deref(src[1],_Y),
+ deref(src[0],_Z),
+ deref(src[1],_Z));
+ break;
+
+ case FP_OPCODE_DP4:
+ assign4_replicate(p, inst,
+ "%s*%s + %s*%s + %s*%s + %s*%s",
+ deref(src[0],_X),
+ deref(src[1],_X),
+ deref(src[0],_Y),
+ deref(src[1],_Y),
+ deref(src[0],_Z),
+ deref(src[1],_Z));
+ break;
+
+ case FP_OPCODE_DPH:
+ assign4_replicate(p, inst,
+ "%s*%s + %s*%s + %s*%s + %s",
+ deref(src[0],_X),
+ deref(src[1],_X),
+ deref(src[0],_Y),
+ deref(src[1],_Y),
+ deref(src[1],_Z));
+ break;
+
+ case FP_OPCODE_DST:
+ /* result[0] = 1 * 1;
+ * result[1] = a[1] * b[1];
+ * result[2] = a[2] * 1;
+ * result[3] = 1 * b[3];
+ */
+ assign_single(0, p, inst, "1.0");
+
+ assign_single(1, p, inst, "%s * %s",
+ deref(src[0], _Y), deref(src[1], _Y));
+
+ assign_single(2, p, inst, "%s", deref(src[0], _Z));
+ assign_single(3, p, inst, "%s", deref(src[1], _W));
+ break;
+
+ case FP_OPCODE_EX2:
+ assign4_replicate(p, inst, "powf(2.0, %s)", src[0]);
+ break;
+
+ case FP_OPCODE_FLR:
+ assign4_replicate(p, inst, "floorf(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_FRC:
+ assign4_replicate(p, inst, "%s - floorf(%s)", src[0], src[0]);
+ break;
+
+ case FP_OPCODE_KIL:
+ do_tex_kill(p, inst, src[0]);
+ break;
+
+ case FP_OPCODE_LG2:
+ assign4_replicate(p, inst, "LOG2(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_LIT:
+ assign_single(0, p, inst, "1.0");
+ assign_single(1, p, inst, "MIN2(%s, 0)", deref(src[0], _X));
+ assign_single(2, p, inst, "(%s > 0.0) ? expf(%s * MIN2(%s, 0)) : 0.0",
+ deref(src[0], _X),
+ deref(src[0], _Z),
+ deref(src[0], _Y));
+ assign_single(3, p, inst, "1.0");
+ break;
+
+ case FP_OPCODE_LRP:
+ assign4(p, inst,
+ "%s * %s + (1.0 - %s) * %s",
+ src[0], src[1], src[0], src[2]);
+ break;
+
+ case FP_OPCODE_MAD:
+ assign4(p, inst, "%s * %s + %s", src[0], src[1], src[2]);
+ break;
+
+ case FP_OPCODE_MAX:
+ assign4(p, inst, "MAX2(%s, %s)", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_MIN:
+ assign4(p, inst, "MIN2(%s, %s)", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_MOV:
+ assign4(p, inst, "%s", src[0]);
+ break;
+
+ case FP_OPCODE_MUL:
+ assign4(p, inst, "%s * %s", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_POW:
+ assign4_replicate(p, inst, "powf(%s, %s)", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_RCP:
+ assign4_replicate(p, inst, "1.0/%s", src[0]);
+ break;
+
+ case FP_OPCODE_RSQ:
+ assign4_replicate(p, inst, "_mesa_inv_sqrtf(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_SCS:
+ if (inst->DstReg.WriteMask[0]) {
+ assign_single(0, p, inst, "cosf(%s)", deref(src[0], _X));
+ }
+
+ if (inst->DstReg.WriteMask[1]) {
+ assign_single(1, p, inst, "sinf(%s)", deref(src[0], _X));
+ }
+ break;
+
+ case FP_OPCODE_SGE:
+ assign4(p, inst, "%s >= %s ? 1.0 : 0.0", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_SIN:
+ assign4_replicate(p, inst, "sinf(%s)", src[0]);
+ break;
+
+ case FP_OPCODE_SLT:
+ assign4(p, inst, "%s < %s ? 1.0 : 0.0", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_SUB:
+ assign4(p, inst, "%s - %s", src[0], src[1]);
+ break;
+
+ case FP_OPCODE_SWZ: /* same implementation as MOV: */
+ assign4(p, inst, "%s", src[0]);
+ break;
+
+ case FP_OPCODE_TEX:
+ do_tex(p, inst, "TEX", inst->TexSrcUnit, src[0]);
+ break;
+
+ case FP_OPCODE_TXB:
+ do_tex(p, inst, "TXB", inst->TexSrcUnit, src[0]);
+ break;
+
+ case FP_OPCODE_TXP:
+ do_tex(p, inst, "TXP", inst->TexSrcUnit, src[0]);
+ break;
+
+ case FP_OPCODE_XPD:
+ /* Cross product:
+ * result.x = src[0].y * src[1].z - src[0].z * src[1].y;
+ * result.y = src[0].z * src[1].x - src[0].x * src[1].z;
+ * result.z = src[0].x * src[1].y - src[0].y * src[1].x;
+ * result.w = undef;
+ */
+ assign4(p, inst,
+ "%s * %s - %s * %s",
+ swizzle(src[0], _Y, _Z, _X, _ONE),
+ swizzle(src[1], _Z, _X, _Y, _ONE),
+ swizzle(src[0], _Z, _X, _Y, _ONE),
+ swizzle(src[1], _Y, _Z, _X, _ONE));
+ break;
+
+ default:
+ emit(p, "BOGUS OPCODE\n");
+ return;
+ }
+ }
+}
+
+
+
+
+
+void _swrast_translate_program( GLcontext *ctx )
+{
+ struct fragment_program *p = ctx->FragmentProgram._Current;
+
+ if (p) {
+ p->c_strlen = 0;
+
+ print_header( p );
+ translate_program( p );
+ print_footer( p );
+ }
+}
+
+#endif /*USE_TCC*/
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_imaging.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_imaging.c
new file mode 100644
index 000000000..5c79a7ba9
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_imaging.c
@@ -0,0 +1,213 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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.
+ */
+
+/* KW: Moved these here to remove knowledge of swrast from core mesa.
+ * Should probably pull the entire software implementation of these
+ * extensions into either swrast or a sister module.
+ */
+
+#include "s_context.h"
+#include "s_span.h"
+#include "colortab.h"
+#include "convolve.h"
+
+
+void
+_swrast_CopyColorTable( GLcontext *ctx,
+ GLenum target, GLenum internalformat,
+ GLint x, GLint y, GLsizei width)
+{
+ GLchan data[MAX_WIDTH][4];
+ struct gl_buffer_object *bufferSave;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ /* Select buffer to read from */
+ _swrast_use_read_buffer(ctx);
+
+ if (width > MAX_WIDTH)
+ width = MAX_WIDTH;
+
+ /* read the data from framebuffer */
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, x, y, data );
+
+ /* Restore reading from draw buffer (the default) */
+ _swrast_use_draw_buffer(ctx);
+
+ /* save PBO binding */
+ bufferSave = ctx->Unpack.BufferObj;
+ ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+
+ _mesa_ColorTable(target, internalformat, width, GL_RGBA, CHAN_TYPE, data);
+
+ /* restore PBO binding */
+ ctx->Unpack.BufferObj = bufferSave;
+}
+
+
+void
+_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
+ GLint x, GLint y, GLsizei width)
+{
+ GLchan data[MAX_WIDTH][4];
+ struct gl_buffer_object *bufferSave;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ /* Select buffer to read from */
+ _swrast_use_read_buffer(ctx);
+
+ if (width > MAX_WIDTH)
+ width = MAX_WIDTH;
+
+ /* read the data from framebuffer */
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, x, y, data );
+
+ /* Restore reading from draw buffer (the default) */
+ _swrast_use_draw_buffer(ctx);
+
+ /* save PBO binding */
+ bufferSave = ctx->Unpack.BufferObj;
+ ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+
+ _mesa_ColorSubTable(target, start, width, GL_RGBA, CHAN_TYPE, data);
+
+ /* restore PBO binding */
+ ctx->Unpack.BufferObj = bufferSave;
+}
+
+
+void
+_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
+ struct gl_buffer_object *bufferSave;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ /* Select buffer to read from */
+ _swrast_use_read_buffer(ctx);
+
+ RENDER_START( swrast, ctx );
+
+ /* read the data from framebuffer */
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, x, y, (GLchan (*)[4]) rgba );
+
+ RENDER_FINISH( swrast, ctx );
+
+ /* Restore reading from draw buffer (the default) */
+ _swrast_use_draw_buffer(ctx);
+
+ /* save PBO binding */
+ bufferSave = ctx->Unpack.BufferObj;
+ ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+
+ /* store as convolution filter */
+ _mesa_ConvolutionFilter1D(target, internalFormat, width,
+ GL_RGBA, CHAN_TYPE, rgba);
+
+ /* restore PBO binding */
+ ctx->Unpack.BufferObj = bufferSave;
+}
+
+
+void
+_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLsizei height)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_pixelstore_attrib packSave;
+ GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
+ GLint i;
+ struct gl_buffer_object *bufferSave;
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ /* Select buffer to read from */
+ _swrast_use_read_buffer(ctx);
+
+ RENDER_START(swrast,ctx);
+
+ /* read pixels from framebuffer */
+ for (i = 0; i < height; i++) {
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, x, y + i, (GLchan (*)[4]) rgba[i] );
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ /* Restore reading from draw buffer (the default) */
+ _swrast_use_draw_buffer(ctx);
+
+ /*
+ * HACK: save & restore context state so we can store this as a
+ * convolution filter via the GL api. Doesn't call any callbacks
+ * hanging off ctx->Unpack statechanges.
+ */
+
+ packSave = ctx->Unpack; /* save pixel packing params */
+
+ ctx->Unpack.Alignment = 1;
+ ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
+ ctx->Unpack.SkipPixels = 0;
+ ctx->Unpack.SkipRows = 0;
+ ctx->Unpack.ImageHeight = 0;
+ ctx->Unpack.SkipImages = 0;
+ ctx->Unpack.SwapBytes = GL_FALSE;
+ ctx->Unpack.LsbFirst = GL_FALSE;
+ ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+ ctx->NewState |= _NEW_PACKUNPACK;
+
+ /* save PBO binding */
+ bufferSave = ctx->Unpack.BufferObj;
+ ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+
+ _mesa_ConvolutionFilter2D(target, internalFormat, width, height,
+ GL_RGBA, CHAN_TYPE, rgba);
+
+ /* restore PBO binding */
+ ctx->Unpack.BufferObj = bufferSave;
+
+ ctx->Unpack = packSave; /* restore pixel packing params */
+ ctx->NewState |= _NEW_PACKUNPACK;
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.c
new file mode 100644
index 000000000..dccc92cbd
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.c
@@ -0,0 +1,338 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "macros.h"
+#include "nvfragprog.h"
+#include "s_aaline.h"
+#include "s_context.h"
+#include "s_depth.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, struct sw_span *span, GLboolean xMajor )
+{
+ GLint width, start;
+
+ ASSERT(span->end < MAX_WIDTH);
+
+ width = (GLint) CLAMP( ctx->Line._Width, MIN_LINE_WIDTH, MAX_LINE_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]++;
+ }
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, span);
+ else
+ _swrast_write_index_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]++;
+ }
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, span);
+ else
+ _swrast_write_index_span(ctx, span);
+ }
+ }
+}
+
+
+
+/**********************************************************************/
+/***** Rasterization *****/
+/**********************************************************************/
+
+/* Simple color index line (no stipple, width=1, no Z, no fog, no tex)*/
+#define NAME simple_ci_line
+#define INTERP_INDEX
+#define RENDER_SPAN(span) _swrast_write_index_span(ctx, &span)
+#include "s_linetemp.h"
+
+/* Simple RGBA index line (no stipple, width=1, no Z, no fog, no tex)*/
+#define NAME simple_rgba_line
+#define INTERP_RGBA
+#define RENDER_SPAN(span) _swrast_write_rgba_span(ctx, &span);
+#include "s_linetemp.h"
+
+
+/* Z, fog, wide, stipple color index line */
+#define NAME general_ci_line
+#define INTERP_INDEX
+#define INTERP_Z
+#define INTERP_FOG
+#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_index_span(ctx, &span); \
+ }
+#include "s_linetemp.h"
+
+
+/* Z, fog, wide, stipple RGBA line */
+#define NAME general_rgba_line
+#define INTERP_RGBA
+#define INTERP_Z
+#define INTERP_FOG
+#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"
+
+
+/* Single-texture line, w/ fog, Z, specular, etc. */
+#define NAME textured_line
+#define INTERP_RGBA
+#define INTERP_Z
+#define INTERP_FOG
+#define INTERP_TEX
+#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"
+
+
+/* Multi-texture or separate specular line, w/ fog, Z, specular, etc. */
+#define NAME multitextured_line
+#define INTERP_RGBA
+#define INTERP_SPEC
+#define INTERP_Z
+#define INTERP_FOG
+#define INTERP_MULTITEX
+#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;
+ GLchan c[2][4];
+ COPY_CHAN4( c[0], ncv0->color );
+ COPY_CHAN4( c[1], ncv1->color );
+ ACC_3V( ncv0->color, ncv0->specular );
+ ACC_3V( ncv1->color, ncv1->specular );
+ SWRAST_CONTEXT(ctx)->SpecLine( ctx, ncv0, ncv1 );
+ COPY_CHAN4( ncv0->color, c[0] );
+ COPY_CHAN4( ncv1->color, c[1] );
+}
+
+
+#ifdef DEBUG
+extern void
+_mesa_print_line_function(GLcontext *ctx); /* silence compiler warning */
+void
+_mesa_print_line_function(GLcontext *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _mesa_printf("Line Func == ");
+ if (swrast->Line == simple_ci_line)
+ _mesa_printf("simple_ci_line\n");
+ else if (swrast->Line == simple_rgba_line)
+ _mesa_printf("simple_rgba_line\n");
+ else if (swrast->Line == general_ci_line)
+ _mesa_printf("general_ci_line\n");
+ else if (swrast->Line == general_rgba_line)
+ _mesa_printf("general_rgba_line\n");
+ else if (swrast->Line == textured_line)
+ _mesa_printf("textured_line\n");
+ else if (swrast->Line == multitextured_line)
+ _mesa_printf("multitextured_line\n");
+ else
+ _mesa_printf("Driver func %p\n", (void *(*)()) swrast->Line);
+}
+#endif
+
+
+
+#ifdef DEBUG
+
+/* record the current line function name */
+static const char *lineFuncName = NULL;
+
+#define USE(lineFunc) \
+do { \
+ lineFuncName = #lineFunc; \
+ /*_mesa_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);
+ const GLboolean rgbmode = ctx->Visual.rgbMode;
+
+ 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) {
+ /* textured lines */
+ if (ctx->Texture._EnabledCoordUnits > 0x1
+ || NEED_SECONDARY_COLOR(ctx)) {
+ /* multi-texture and/or separate specular color */
+ USE(multitextured_line);
+ }
+ else {
+ USE(textured_line);
+ }
+ }
+ else if (ctx->Depth.Test || swrast->_FogEnabled || ctx->Line._Width != 1.0
+ || ctx->Line.StippleFlag) {
+ /* no texture, but Z, fog, width>1, stipple, etc. */
+ if (rgbmode)
+ USE(general_rgba_line);
+ else
+ USE(general_ci_line);
+ }
+ else {
+ /* simplest lines */
+ if (rgbmode)
+ USE(simple_rgba_line);
+ else
+ USE(simple_ci_line);
+ }
+ }
+ else if (ctx->RenderMode == GL_FEEDBACK) {
+ USE(_swrast_feedback_line);
+ }
+ else {
+ ASSERT(ctx->RenderMode == GL_SELECT);
+ USE(_swrast_select_line);
+ }
+
+ /*_mesa_print_line_function(ctx);*/
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.h
new file mode 100644
index 000000000..5372b99b9
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_lines.h
@@ -0,0 +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 "mtypes.h"
+
+void
+_swrast_choose_line( GLcontext *ctx );
+
+void
+_swrast_add_spec_terms_line( GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1 );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_linetemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_linetemp.h
new file mode 100644
index 000000000..af7aeabf6
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_linetemp.h
@@ -0,0 +1,454 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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_FOG - if defined, interpolate FOG values
+ * INTERP_RGBA - if defined, interpolate RGBA values
+ * INTERP_SPEC - if defined, interpolate specular RGB values
+ * INTERP_INDEX - if defined, interpolate color index values
+ * INTERP_TEX - if defined, interpolate unit 0 texcoords
+ * INTERP_MULTITEX - if defined, interpolate multi-texcoords
+ *
+ * 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 )
+{
+ struct sw_span span;
+ GLuint interpFlags = 0;
+ GLint x0 = (GLint) vert0->win[0];
+ GLint x1 = (GLint) vert1->win[0];
+ GLint y0 = (GLint) vert0->win[1];
+ GLint y1 = (GLint) vert1->win[1];
+ GLint dx, dy;
+ GLint numPixels;
+ GLint xstep, ystep;
+#if defined(DEPTH_TYPE)
+ const GLint depthBits = ctx->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->Visual.depthBits;
+#endif
+#ifdef PIXEL_ADDRESS
+ PIXEL_TYPE *pixelPtr;
+ GLint pixelXstep, pixelYstep;
+#endif
+
+#ifdef SETUP_CODE
+ SETUP_CODE
+#endif
+
+ /* Cull primitives with malformed coordinates.
+ */
+ {
+ GLfloat tmp = vert0->win[0] + vert0->win[1]
+ + vert1->win[0] + vert1->win[1];
+ if (IS_INF_OR_NAN(tmp))
+ return;
+ }
+
+ /*
+ printf("%s():\n", __FUNCTION__);
+ printf(" (%f, %f, %f) -> (%f, %f, %f)\n",
+ vert0->win[0], vert0->win[1], vert0->win[2],
+ vert1->win[0], vert1->win[1], vert1->win[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;
+
+#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.
+ */
+#ifdef INTERP_RGBA
+ 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;
+ }
+#endif
+#ifdef INTERP_SPEC
+ interpFlags |= SPAN_SPEC;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ span.specRed = ChanToFixed(vert0->specular[0]);
+ span.specGreen = ChanToFixed(vert0->specular[1]);
+ span.specBlue = ChanToFixed(vert0->specular[2]);
+ span.specRedStep = (ChanToFixed(vert1->specular[0]) - span.specRed) / numPixels;
+ span.specGreenStep = (ChanToFixed(vert1->specular[1]) - span.specBlue) / numPixels;
+ span.specBlueStep = (ChanToFixed(vert1->specular[2]) - span.specGreen) / numPixels;
+ }
+ else {
+ span.specRed = ChanToFixed(vert1->specular[0]);
+ span.specGreen = ChanToFixed(vert1->specular[1]);
+ span.specBlue = ChanToFixed(vert1->specular[2]);
+ span.specRedStep = 0;
+ span.specGreenStep = 0;
+ span.specBlueStep = 0;
+ }
+#endif
+#ifdef INTERP_INDEX
+ interpFlags |= SPAN_INDEX;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ span.index = FloatToFixed(vert0->index);
+ span.indexStep = FloatToFixed(vert1->index - vert0->index) / numPixels;
+ }
+ else {
+ span.index = FloatToFixed(vert1->index);
+ span.indexStep = 0;
+ }
+#endif
+#if defined(INTERP_Z) || defined(DEPTH_TYPE)
+ interpFlags |= SPAN_Z;
+ {
+ if (depthBits <= 16) {
+ span.z = FloatToFixed(vert0->win[2]) + FIXED_HALF;
+ span.zStep = FloatToFixed(vert1->win[2] - vert0->win[2]) / numPixels;
+ }
+ else {
+ /* don't use fixed point */
+ span.z = (GLint) vert0->win[2];
+ span.zStep = (GLint) ((vert1->win[2] - vert0->win[2]) / numPixels);
+ }
+ }
+#endif
+#ifdef INTERP_FOG
+ interpFlags |= SPAN_FOG;
+ span.fog = vert0->fog;
+ span.fogStep = (vert1->fog - vert0->fog) / numPixels;
+#endif
+#ifdef INTERP_TEX
+ interpFlags |= SPAN_TEXTURE;
+ {
+ const GLfloat invw0 = vert0->win[3];
+ const GLfloat invw1 = vert1->win[3];
+ const GLfloat invLen = 1.0F / numPixels;
+ GLfloat ds, dt, dr, dq;
+ span.tex[0][0] = invw0 * vert0->texcoord[0][0];
+ span.tex[0][1] = invw0 * vert0->texcoord[0][1];
+ span.tex[0][2] = invw0 * vert0->texcoord[0][2];
+ span.tex[0][3] = invw0 * vert0->texcoord[0][3];
+ ds = (invw1 * vert1->texcoord[0][0]) - span.tex[0][0];
+ dt = (invw1 * vert1->texcoord[0][1]) - span.tex[0][1];
+ dr = (invw1 * vert1->texcoord[0][2]) - span.tex[0][2];
+ dq = (invw1 * vert1->texcoord[0][3]) - span.tex[0][3];
+ span.texStepX[0][0] = ds * invLen;
+ span.texStepX[0][1] = dt * invLen;
+ span.texStepX[0][2] = dr * invLen;
+ span.texStepX[0][3] = dq * invLen;
+ span.texStepY[0][0] = 0.0F;
+ span.texStepY[0][1] = 0.0F;
+ span.texStepY[0][2] = 0.0F;
+ span.texStepY[0][3] = 0.0F;
+ }
+#endif
+#ifdef INTERP_MULTITEX
+ interpFlags |= SPAN_TEXTURE;
+ {
+ const GLfloat invLen = 1.0F / numPixels;
+ GLuint u;
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ const GLfloat invw0 = vert0->win[3];
+ const GLfloat invw1 = vert1->win[3];
+ GLfloat ds, dt, dr, dq;
+ span.tex[u][0] = invw0 * vert0->texcoord[u][0];
+ span.tex[u][1] = invw0 * vert0->texcoord[u][1];
+ span.tex[u][2] = invw0 * vert0->texcoord[u][2];
+ span.tex[u][3] = invw0 * vert0->texcoord[u][3];
+ ds = (invw1 * vert1->texcoord[u][0]) - span.tex[u][0];
+ dt = (invw1 * vert1->texcoord[u][1]) - span.tex[u][1];
+ dr = (invw1 * vert1->texcoord[u][2]) - span.tex[u][2];
+ dq = (invw1 * vert1->texcoord[u][3]) - span.tex[u][3];
+ span.texStepX[u][0] = ds * invLen;
+ span.texStepX[u][1] = dt * invLen;
+ span.texStepX[u][2] = dr * invLen;
+ span.texStepX[u][3] = dq * invLen;
+ span.texStepY[u][0] = 0.0F;
+ span.texStepY[u][1] = 0.0F;
+ span.texStepY[u][2] = 0.0F;
+ span.texStepY[u][3] = 0.0F;
+ }
+ }
+ }
+#endif
+
+ INIT_SPAN(span, GL_LINE, numPixels, interpFlags, SPAN_XY);
+
+ /* Need these for fragment prog texcoord interpolation */
+ span.w = 1.0F;
+ span.dwdx = 0.0F;
+ span.dwdy = 0.0F;
+
+ /*
+ * 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
+ GLdepth 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
+ GLdepth 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_FOG
+#undef INTERP_RGBA
+#undef INTERP_SPEC
+#undef INTERP_TEX
+#undef INTERP_MULTITEX
+#undef INTERP_INDEX
+#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/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.c
new file mode 100644
index 000000000..ff3c3fc2f
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.c
@@ -0,0 +1,244 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "imports.h"
+#include "macros.h"
+
+#include "s_context.h"
+#include "s_logic.h"
+#include "s_span.h"
+
+
+#define LOGIC_OP_LOOP(MODE) \
+do { \
+ GLuint i; \
+ switch (MODE) { \
+ case GL_CLEAR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = 0; \
+ } \
+ } \
+ break; \
+ case GL_SET: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~0; \
+ } \
+ } \
+ break; \
+ case GL_COPY: \
+ /* do nothing */ \
+ break; \
+ case GL_COPY_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~src[i]; \
+ } \
+ } \
+ break; \
+ case GL_NOOP: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_INVERT: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_AND: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] &= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_NAND: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~(src[i] & dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_OR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] |= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_NOR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~(src[i] | dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_XOR: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] ^= dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_EQUIV: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~(src[i] ^ dest[i]); \
+ } \
+ } \
+ break; \
+ case GL_AND_REVERSE: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = src[i] & ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_AND_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~src[i] & dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_OR_REVERSE: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = src[i] | ~dest[i]; \
+ } \
+ } \
+ break; \
+ case GL_OR_INVERTED: \
+ for (i = 0; i < n; i++) { \
+ if (mask[i]) { \
+ src[i] = ~src[i] | dest[i]; \
+ } \
+ } \
+ break; \
+ default: \
+ _mesa_problem(ctx, "bad logicop mode");\
+ } \
+} while (0)
+
+
+
+static void
+logicop_ubyte(GLcontext *ctx, GLuint n, GLubyte src[], const GLubyte dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp);
+}
+
+
+static void
+logicop_ushort(GLcontext *ctx, GLuint n, GLushort src[], const GLushort dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp);
+}
+
+
+static void
+logicop_uint(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[],
+ const GLubyte mask[])
+{
+ LOGIC_OP_LOOP(ctx->Color.LogicOp);
+}
+
+
+
+/*
+ * Apply the current logic operator to a span of CI pixels. This is only
+ * used if the device driver can't do logic ops.
+ */
+void
+_swrast_logicop_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLuint index[])
+{
+ GLuint dest[MAX_WIDTH];
+
+ ASSERT(span->end < MAX_WIDTH);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+
+ /* Read dest values from frame buffer */
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ dest, sizeof(GLuint));
+ }
+ else {
+ rb->GetRow(ctx, rb, span->end, span->x, span->y, dest);
+ }
+
+ logicop_uint(ctx, span->end, index, dest, span->array->mask);
+}
+
+
+/**
+ * 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,
+ const struct sw_span *span, GLchan rgba[][4])
+{
+ GLchan dest[MAX_WIDTH][4];
+
+ ASSERT(span->end < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ dest, 4 * sizeof(GLchan));
+ }
+ else {
+ _swrast_read_rgba_span(ctx, rb, span->end, span->x, span->y, dest);
+ }
+
+ /* XXX make this a runtime test */
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ /* treat 4*GLubyte as GLuint */
+ logicop_uint(ctx, span->end, (GLuint *) rgba,
+ (const GLuint *) dest, span->array->mask);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ logicop_ushort(ctx, 4 * span->end, (GLushort *) rgba,
+ (const GLushort *) dest, span->array->mask);
+#elif CHAN_TYPE == GL_FLOAT
+ logicop_uint(ctx, 4 * span->end, (GLuint *) rgba,
+ (const GLuint *) dest, span->array->mask);
+#endif
+ (void) logicop_ubyte;
+ (void) logicop_ushort;
+ (void) logicop_uint;
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.h
new file mode 100644
index 000000000..ce5f183ff
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_logic.h
@@ -0,0 +1,44 @@
+/*
+ * 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_LOGIC_H
+#define S_LOGIC_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern void
+_swrast_logicop_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLuint index[]);
+
+
+extern void
+_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLchan rgba[][4]);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.c
new file mode 100644
index 000000000..65c4e7d01
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.c
@@ -0,0 +1,172 @@
+/*
+ * 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.
+ */
+
+
+/*
+ * Implement the effect of glColorMask and glIndexMask in software.
+ */
+
+
+#include "glheader.h"
+#include "enums.h"
+#include "macros.h"
+
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+
+void
+_swrast_mask_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLchan rgba[][4])
+{
+ GLchan dest[MAX_WIDTH][4];
+#if CHAN_BITS == 8
+ GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
+ GLuint dstMask = ~srcMask;
+ GLuint *rgba32 = (GLuint *) rgba;
+ GLuint *dest32 = (GLuint *) dest;
+#else
+ const GLboolean rMask = ctx->Color.ColorMask[RCOMP];
+ const GLboolean gMask = ctx->Color.ColorMask[GCOMP];
+ const GLboolean bMask = ctx->Color.ColorMask[BCOMP];
+ const GLboolean aMask = ctx->Color.ColorMask[ACOMP];
+#endif
+ const GLuint n = span->end;
+ GLuint i;
+
+ ASSERT(n < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, n, span->array->x, span->array->y,
+ dest, 4 * sizeof(GLchan));
+ }
+ else {
+ _swrast_read_rgba_span(ctx, rb, n, span->x, span->y, dest);
+ }
+
+#if CHAN_BITS == 8
+ for (i = 0; i < n; i++) {
+ rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
+ }
+#else
+ for (i = 0; i < n; i++) {
+ if (!rMask) rgba[i][RCOMP] = dest[i][RCOMP];
+ if (!gMask) rgba[i][GCOMP] = dest[i][GCOMP];
+ if (!bMask) rgba[i][BCOMP] = dest[i][BCOMP];
+ if (!aMask) rgba[i][ACOMP] = dest[i][ACOMP];
+ }
+#endif
+}
+
+
+/*
+ * Apply glColorMask to a span of RGBA pixels.
+ */
+void
+_swrast_mask_rgba_array(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLchan rgba[][4])
+{
+ GLchan dest[MAX_WIDTH][4];
+ GLuint i;
+
+#if CHAN_BITS == 8
+
+ GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
+ GLuint dstMask = ~srcMask;
+ GLuint *rgba32 = (GLuint *) rgba;
+ GLuint *dest32 = (GLuint *) dest;
+
+ _swrast_read_rgba_span( ctx, rb, n, x, y, dest );
+ for (i = 0; i < n; i++) {
+ rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
+ }
+
+#else
+
+ const GLint rMask = ctx->Color.ColorMask[RCOMP];
+ const GLint gMask = ctx->Color.ColorMask[GCOMP];
+ const GLint bMask = ctx->Color.ColorMask[BCOMP];
+ const GLint aMask = ctx->Color.ColorMask[ACOMP];
+
+ _swrast_read_rgba_span( ctx, rb, n, x, y, dest );
+ for (i = 0; i < n; i++) {
+ if (!rMask) rgba[i][RCOMP] = dest[i][RCOMP];
+ if (!gMask) rgba[i][GCOMP] = dest[i][GCOMP];
+ if (!bMask) rgba[i][BCOMP] = dest[i][BCOMP];
+ if (!aMask) rgba[i][ACOMP] = dest[i][ACOMP];
+ }
+
+#endif
+}
+
+
+
+void
+_swrast_mask_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLuint index[])
+{
+ const GLuint srcMask = ctx->Color.IndexMask;
+ const GLuint dstMask = ~srcMask;
+ GLuint dest[MAX_WIDTH];
+ GLuint i;
+
+ ASSERT(span->arrayMask & SPAN_INDEX);
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ dest, sizeof(GLuint));
+ }
+ else {
+ _swrast_read_index_span(ctx, rb, span->end, span->x, span->y, dest);
+ }
+
+ for (i = 0; i < span->end; i++) {
+ index[i] = (index[i] & srcMask) | (dest[i] & dstMask);
+ }
+}
+
+
+/*
+ * Apply glIndexMask to an array of CI pixels.
+ */
+void
+_swrast_mask_ci_array(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLuint index[])
+{
+ const GLuint srcMask = ctx->Color.IndexMask;
+ const GLuint dstMask = ~srcMask;
+ GLuint dest[MAX_WIDTH];
+ GLuint i;
+
+ _swrast_read_index_span(ctx, rb, n, x, y, dest);
+
+ for (i=0;i<n;i++) {
+ index[i] = (index[i] & srcMask) | (dest[i] & dstMask);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.h
new file mode 100644
index 000000000..e2265448f
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_masking.h
@@ -0,0 +1,58 @@
+/*
+ * 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_MASKING_H
+#define S_MASKING_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+/*
+ * Implement glColorMask for a span of RGBA pixels.
+ */
+extern void
+_swrast_mask_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLchan rgba[][4]);
+
+
+extern void
+_swrast_mask_rgba_array(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLchan rgba[][4]);
+
+
+/*
+ * Implement glIndexMask for a span of CI pixels.
+ */
+extern void
+_swrast_mask_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ const struct sw_span *span, GLuint index[]);
+
+extern void
+_swrast_mask_ci_array(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLuint index[]);
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.c
new file mode 100644
index 000000000..5ee4a041a
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.c
@@ -0,0 +1,1507 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4
+ *
+ * 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.
+ */
+
+/*
+ * Regarding GL_NV_fragment_program:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "nvfragprog.h"
+#include "macros.h"
+#include "program.h"
+
+#include "s_nvfragprog.h"
+#include "s_span.h"
+#include "s_texture.h"
+
+
+/* if 1, print some debugging info */
+#define DEBUG_FRAG 0
+
+/**
+ * Fetch a texel.
+ */
+static void
+fetch_texel( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4] )
+{
+ GLchan rgba[4];
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* XXX use a float-valued TextureSample routine here!!! */
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ color[0] = CHAN_TO_FLOAT(rgba[0]);
+ color[1] = CHAN_TO_FLOAT(rgba[1]);
+ color[2] = CHAN_TO_FLOAT(rgba[2]);
+ color[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+/**
+ * Fetch a texel with the given partial derivatives to compute a level
+ * of detail in the mipmap.
+ */
+static void
+fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4],
+ const GLfloat texdx[4], const GLfloat texdy[4],
+ GLuint unit, GLfloat color[4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+ const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel];
+ const GLfloat texW = (GLfloat) texImg->WidthScale;
+ const GLfloat texH = (GLfloat) texImg->HeightScale;
+ GLchan rgba[4];
+
+ GLfloat lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
+ texdx[1], texdy[1], /* dt/dx, dt/dy */
+ texdx[3], texdy[2], /* dq/dx, dq/dy */
+ texW, texH,
+ texcoord[0], texcoord[1], texcoord[3],
+ 1.0F / texcoord[3]);
+
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ color[0] = CHAN_TO_FLOAT(rgba[0]);
+ color[1] = CHAN_TO_FLOAT(rgba[1]);
+ color[2] = CHAN_TO_FLOAT(rgba[2]);
+ color[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+/**
+ * Return a pointer to the 4-element float vector specified by the given
+ * source register.
+ */
+static INLINE const GLfloat *
+get_register_pointer( GLcontext *ctx,
+ const struct fp_src_register *source,
+ const struct fp_machine *machine,
+ const struct fragment_program *program )
+{
+ const GLfloat *src;
+ switch (source->File) {
+ case PROGRAM_TEMPORARY:
+ ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_TEMPS);
+ src = machine->Temporaries[source->Index];
+ break;
+ case PROGRAM_INPUT:
+ ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_INPUTS);
+ src = machine->Inputs[source->Index];
+ break;
+ case PROGRAM_OUTPUT:
+ /* This is only for PRINT */
+ ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_OUTPUTS);
+ src = machine->Outputs[source->Index];
+ break;
+ case PROGRAM_LOCAL_PARAM:
+ ASSERT(source->Index < MAX_PROGRAM_LOCAL_PARAMS);
+ src = program->Base.LocalParams[source->Index];
+ break;
+ case PROGRAM_ENV_PARAM:
+ ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_PARAMS);
+ src = ctx->FragmentProgram.Parameters[source->Index];
+ break;
+ case PROGRAM_STATE_VAR:
+ /* Fallthrough */
+ case PROGRAM_NAMED_PARAM:
+ ASSERT(source->Index < (GLint) program->Parameters->NumParameters);
+ src = program->Parameters->ParameterValues[source->Index];
+ break;
+ default:
+ _mesa_problem(ctx, "Invalid input register file %d in fetch_vector4", source->File);
+ src = NULL;
+ }
+ return src;
+}
+
+
+/**
+ * Fetch a 4-element float vector from the given source register.
+ * Apply swizzling and negating as needed.
+ */
+static void
+fetch_vector4( GLcontext *ctx,
+ const struct fp_src_register *source,
+ const struct fp_machine *machine,
+ const struct fragment_program *program,
+ GLfloat result[4] )
+{
+ const GLfloat *src = get_register_pointer(ctx, source, machine, program);
+ ASSERT(src);
+
+ result[0] = src[GET_SWZ(source->Swizzle, 0)];
+ result[1] = src[GET_SWZ(source->Swizzle, 1)];
+ result[2] = src[GET_SWZ(source->Swizzle, 2)];
+ result[3] = src[GET_SWZ(source->Swizzle, 3)];
+
+ if (source->NegateBase) {
+ result[0] = -result[0];
+ result[1] = -result[1];
+ result[2] = -result[2];
+ result[3] = -result[3];
+ }
+ if (source->Abs) {
+ result[0] = FABSF(result[0]);
+ result[1] = FABSF(result[1]);
+ result[2] = FABSF(result[2]);
+ result[3] = FABSF(result[3]);
+ }
+ if (source->NegateAbs) {
+ result[0] = -result[0];
+ result[1] = -result[1];
+ result[2] = -result[2];
+ result[3] = -result[3];
+ }
+}
+
+
+/**
+ * Fetch the derivative with respect to X for the given register.
+ * \return GL_TRUE if it was easily computed or GL_FALSE if we
+ * need to execute another instance of the program (ugh)!
+ */
+static GLboolean
+fetch_vector4_deriv( GLcontext *ctx,
+ const struct fp_src_register *source,
+ const struct sw_span *span,
+ char xOrY, GLint column, GLfloat result[4] )
+{
+ GLfloat src[4];
+
+ ASSERT(xOrY == 'X' || xOrY == 'Y');
+
+ switch (source->Index) {
+ case FRAG_ATTRIB_WPOS:
+ if (xOrY == 'X') {
+ src[0] = 1.0;
+ src[1] = 0.0;
+ src[2] = span->dzdx / ctx->DrawBuffer->_DepthMaxF;
+ src[3] = span->dwdx;
+ }
+ else {
+ src[0] = 0.0;
+ src[1] = 1.0;
+ src[2] = span->dzdy / ctx->DrawBuffer->_DepthMaxF;
+ src[3] = span->dwdy;
+ }
+ break;
+ case FRAG_ATTRIB_COL0:
+ if (xOrY == 'X') {
+ src[0] = span->drdx * (1.0F / CHAN_MAXF);
+ src[1] = span->dgdx * (1.0F / CHAN_MAXF);
+ src[2] = span->dbdx * (1.0F / CHAN_MAXF);
+ src[3] = span->dadx * (1.0F / CHAN_MAXF);
+ }
+ else {
+ src[0] = span->drdy * (1.0F / CHAN_MAXF);
+ src[1] = span->dgdy * (1.0F / CHAN_MAXF);
+ src[2] = span->dbdy * (1.0F / CHAN_MAXF);
+ src[3] = span->dady * (1.0F / CHAN_MAXF);
+ }
+ break;
+ case FRAG_ATTRIB_COL1:
+ if (xOrY == 'X') {
+ src[0] = span->dsrdx * (1.0F / CHAN_MAXF);
+ src[1] = span->dsgdx * (1.0F / CHAN_MAXF);
+ src[2] = span->dsbdx * (1.0F / CHAN_MAXF);
+ src[3] = 0.0; /* XXX need this */
+ }
+ else {
+ src[0] = span->dsrdy * (1.0F / CHAN_MAXF);
+ src[1] = span->dsgdy * (1.0F / CHAN_MAXF);
+ src[2] = span->dsbdy * (1.0F / CHAN_MAXF);
+ src[3] = 0.0; /* XXX need this */
+ }
+ break;
+ case FRAG_ATTRIB_FOGC:
+ if (xOrY == 'X') {
+ src[0] = span->dfogdx;
+ src[1] = 0.0;
+ src[2] = 0.0;
+ src[3] = 0.0;
+ }
+ else {
+ src[0] = span->dfogdy;
+ src[1] = 0.0;
+ src[2] = 0.0;
+ src[3] = 0.0;
+ }
+ break;
+ case FRAG_ATTRIB_TEX0:
+ case FRAG_ATTRIB_TEX1:
+ case FRAG_ATTRIB_TEX2:
+ case FRAG_ATTRIB_TEX3:
+ case FRAG_ATTRIB_TEX4:
+ case FRAG_ATTRIB_TEX5:
+ case FRAG_ATTRIB_TEX6:
+ case FRAG_ATTRIB_TEX7:
+ if (xOrY == 'X') {
+ const GLuint u = source->Index - FRAG_ATTRIB_TEX0;
+ /* this is a little tricky - I think I've got it right */
+ const GLfloat invQ = 1.0f / (span->tex[u][3]
+ + span->texStepX[u][3] * column);
+ src[0] = span->texStepX[u][0] * invQ;
+ src[1] = span->texStepX[u][1] * invQ;
+ src[2] = span->texStepX[u][2] * invQ;
+ src[3] = span->texStepX[u][3] * invQ;
+ }
+ else {
+ const GLuint u = source->Index - FRAG_ATTRIB_TEX0;
+ /* Tricky, as above, but in Y direction */
+ const GLfloat invQ = 1.0f / (span->tex[u][3] + span->texStepY[u][3]);
+ src[0] = span->texStepY[u][0] * invQ;
+ src[1] = span->texStepY[u][1] * invQ;
+ src[2] = span->texStepY[u][2] * invQ;
+ src[3] = span->texStepY[u][3] * invQ;
+ }
+ break;
+ default:
+ return GL_FALSE;
+ }
+
+ result[0] = src[GET_SWZ(source->Swizzle, 0)];
+ result[1] = src[GET_SWZ(source->Swizzle, 1)];
+ result[2] = src[GET_SWZ(source->Swizzle, 2)];
+ result[3] = src[GET_SWZ(source->Swizzle, 3)];
+
+ if (source->NegateBase) {
+ result[0] = -result[0];
+ result[1] = -result[1];
+ result[2] = -result[2];
+ result[3] = -result[3];
+ }
+ if (source->Abs) {
+ result[0] = FABSF(result[0]);
+ result[1] = FABSF(result[1]);
+ result[2] = FABSF(result[2]);
+ result[3] = FABSF(result[3]);
+ }
+ if (source->NegateAbs) {
+ result[0] = -result[0];
+ result[1] = -result[1];
+ result[2] = -result[2];
+ result[3] = -result[3];
+ }
+ return GL_TRUE;
+}
+
+
+/**
+ * As above, but only return result[0] element.
+ */
+static void
+fetch_vector1( GLcontext *ctx,
+ const struct fp_src_register *source,
+ const struct fp_machine *machine,
+ const struct fragment_program *program,
+ GLfloat result[4] )
+{
+ const GLfloat *src = get_register_pointer(ctx, source, machine, program);
+ ASSERT(src);
+
+ result[0] = src[GET_SWZ(source->Swizzle, 0)];
+
+ if (source->NegateBase) {
+ result[0] = -result[0];
+ }
+ if (source->Abs) {
+ result[0] = FABSF(result[0]);
+ }
+ if (source->NegateAbs) {
+ result[0] = -result[0];
+ }
+}
+
+
+/**
+ * Test value against zero and return GT, LT, EQ or UN if NaN.
+ */
+static INLINE GLuint
+generate_cc( float value )
+{
+ if (value != value)
+ return COND_UN; /* NaN */
+ if (value > 0.0F)
+ return COND_GT;
+ if (value < 0.0F)
+ return COND_LT;
+ return COND_EQ;
+}
+
+
+/**
+ * Test if the ccMaskRule is satisfied by the given condition code.
+ * Used to mask destination writes according to the current condition codee.
+ */
+static INLINE GLboolean
+test_cc(GLuint condCode, GLuint ccMaskRule)
+{
+ switch (ccMaskRule) {
+ case COND_EQ: return (condCode == COND_EQ);
+ case COND_NE: return (condCode != COND_EQ);
+ case COND_LT: return (condCode == COND_LT);
+ case COND_GE: return (condCode == COND_GT || condCode == COND_EQ);
+ case COND_LE: return (condCode == COND_LT || condCode == COND_EQ);
+ case COND_GT: return (condCode == COND_GT);
+ case COND_TR: return GL_TRUE;
+ case COND_FL: return GL_FALSE;
+ default: return GL_TRUE;
+ }
+}
+
+
+/**
+ * Store 4 floats into a register. Observe the instructions saturate and
+ * set-condition-code flags.
+ */
+static void
+store_vector4( const struct fp_instruction *inst,
+ struct fp_machine *machine,
+ const GLfloat value[4] )
+{
+ const struct fp_dst_register *dest = &(inst->DstReg);
+ const GLboolean clamp = inst->Saturate;
+ const GLboolean updateCC = inst->UpdateCondRegister;
+ GLfloat *dstReg;
+ GLfloat dummyReg[4];
+ GLfloat clampedValue[4];
+ GLboolean condWriteMask[4];
+ GLuint writeMask = dest->WriteMask;
+
+ switch (dest->File) {
+ case PROGRAM_OUTPUT:
+ dstReg = machine->Outputs[dest->Index];
+ break;
+ case PROGRAM_TEMPORARY:
+ dstReg = machine->Temporaries[dest->Index];
+ break;
+ case PROGRAM_WRITE_ONLY:
+ dstReg = dummyReg;
+ return;
+ default:
+ _mesa_problem(NULL, "bad register file in store_vector4(fp)");
+ return;
+ }
+
+#if DEBUG_FRAG
+ if (value[0] > 1.0e10 ||
+ IS_INF_OR_NAN(value[0]) ||
+ IS_INF_OR_NAN(value[1]) ||
+ IS_INF_OR_NAN(value[2]) ||
+ IS_INF_OR_NAN(value[3]) )
+ printf("store %g %g %g %g\n", value[0], value[1], value[2], value[3]);
+#endif
+
+ if (clamp) {
+ clampedValue[0] = CLAMP(value[0], 0.0F, 1.0F);
+ clampedValue[1] = CLAMP(value[1], 0.0F, 1.0F);
+ clampedValue[2] = CLAMP(value[2], 0.0F, 1.0F);
+ clampedValue[3] = CLAMP(value[3], 0.0F, 1.0F);
+ value = clampedValue;
+ }
+
+ if (dest->CondMask != COND_TR) {
+ condWriteMask[0] = GET_BIT(writeMask, 0)
+ && test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 0)], dest->CondMask);
+ condWriteMask[1] = GET_BIT(writeMask, 1)
+ && test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 1)], dest->CondMask);
+ condWriteMask[2] = GET_BIT(writeMask, 2)
+ && test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 2)], dest->CondMask);
+ condWriteMask[3] = GET_BIT(writeMask, 3)
+ && test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 3)], dest->CondMask);
+
+ writeMask = ((condWriteMask[0] << 0) |
+ (condWriteMask[1] << 1) |
+ (condWriteMask[2] << 2) |
+ (condWriteMask[3] << 3));
+ }
+
+ if (GET_BIT(writeMask, 0)) {
+ dstReg[0] = value[0];
+ if (updateCC)
+ machine->CondCodes[0] = generate_cc(value[0]);
+ }
+ if (GET_BIT(writeMask, 1)) {
+ dstReg[1] = value[1];
+ if (updateCC)
+ machine->CondCodes[1] = generate_cc(value[1]);
+ }
+ if (GET_BIT(writeMask, 2)) {
+ dstReg[2] = value[2];
+ if (updateCC)
+ machine->CondCodes[2] = generate_cc(value[2]);
+ }
+ if (GET_BIT(writeMask, 3)) {
+ dstReg[3] = value[3];
+ if (updateCC)
+ machine->CondCodes[3] = generate_cc(value[3]);
+ }
+}
+
+
+/**
+ * Initialize a new machine state instance from an existing one, adding
+ * the partial derivatives onto the input registers.
+ * Used to implement DDX and DDY instructions in non-trivial cases.
+ */
+static void
+init_machine_deriv( GLcontext *ctx,
+ const struct fp_machine *machine,
+ const struct fragment_program *program,
+ const struct sw_span *span, char xOrY,
+ struct fp_machine *dMachine )
+{
+ GLuint u;
+
+ ASSERT(xOrY == 'X' || xOrY == 'Y');
+
+ /* copy existing machine */
+ _mesa_memcpy(dMachine, machine, sizeof(struct fp_machine));
+
+ if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
+ /* Clear temporary registers (undefined for ARB_f_p) */
+ _mesa_bzero( (void*) machine->Temporaries,
+ MAX_NV_FRAGMENT_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
+ }
+
+ /* Add derivatives */
+ if (program->InputsRead & (1 << FRAG_ATTRIB_WPOS)) {
+ GLfloat *wpos = (GLfloat*) machine->Inputs[FRAG_ATTRIB_WPOS];
+ if (xOrY == 'X') {
+ wpos[0] += 1.0F;
+ wpos[1] += 0.0F;
+ wpos[2] += span->dzdx;
+ wpos[3] += span->dwdx;
+ }
+ else {
+ wpos[0] += 0.0F;
+ wpos[1] += 1.0F;
+ wpos[2] += span->dzdy;
+ wpos[3] += span->dwdy;
+ }
+ }
+ if (program->InputsRead & (1 << FRAG_ATTRIB_COL0)) {
+ GLfloat *col0 = (GLfloat*) machine->Inputs[FRAG_ATTRIB_COL0];
+ if (xOrY == 'X') {
+ col0[0] += span->drdx * (1.0F / CHAN_MAXF);
+ col0[1] += span->dgdx * (1.0F / CHAN_MAXF);
+ col0[2] += span->dbdx * (1.0F / CHAN_MAXF);
+ col0[3] += span->dadx * (1.0F / CHAN_MAXF);
+ }
+ else {
+ col0[0] += span->drdy * (1.0F / CHAN_MAXF);
+ col0[1] += span->dgdy * (1.0F / CHAN_MAXF);
+ col0[2] += span->dbdy * (1.0F / CHAN_MAXF);
+ col0[3] += span->dady * (1.0F / CHAN_MAXF);
+ }
+ }
+ if (program->InputsRead & (1 << FRAG_ATTRIB_COL1)) {
+ GLfloat *col1 = (GLfloat*) machine->Inputs[FRAG_ATTRIB_COL1];
+ if (xOrY == 'X') {
+ col1[0] += span->dsrdx * (1.0F / CHAN_MAXF);
+ col1[1] += span->dsgdx * (1.0F / CHAN_MAXF);
+ col1[2] += span->dsbdx * (1.0F / CHAN_MAXF);
+ col1[3] += 0.0; /*XXX fix */
+ }
+ else {
+ col1[0] += span->dsrdy * (1.0F / CHAN_MAXF);
+ col1[1] += span->dsgdy * (1.0F / CHAN_MAXF);
+ col1[2] += span->dsbdy * (1.0F / CHAN_MAXF);
+ col1[3] += 0.0; /*XXX fix */
+ }
+ }
+ if (program->InputsRead & (1 << FRAG_ATTRIB_FOGC)) {
+ GLfloat *fogc = (GLfloat*) machine->Inputs[FRAG_ATTRIB_FOGC];
+ if (xOrY == 'X') {
+ fogc[0] += span->dfogdx;
+ }
+ else {
+ fogc[0] += span->dfogdy;
+ }
+ }
+ for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
+ if (program->InputsRead & (1 << (FRAG_ATTRIB_TEX0 + u))) {
+ GLfloat *tex = (GLfloat*) machine->Inputs[FRAG_ATTRIB_TEX0 + u];
+ /* XXX perspective-correct interpolation */
+ if (xOrY == 'X') {
+ tex[0] += span->texStepX[u][0];
+ tex[1] += span->texStepX[u][1];
+ tex[2] += span->texStepX[u][2];
+ tex[3] += span->texStepX[u][3];
+ }
+ else {
+ tex[0] += span->texStepY[u][0];
+ tex[1] += span->texStepY[u][1];
+ tex[2] += span->texStepY[u][2];
+ tex[3] += span->texStepY[u][3];
+ }
+ }
+ }
+
+ /* init condition codes */
+ dMachine->CondCodes[0] = COND_EQ;
+ dMachine->CondCodes[1] = COND_EQ;
+ dMachine->CondCodes[2] = COND_EQ;
+ dMachine->CondCodes[3] = COND_EQ;
+}
+
+
+/**
+ * Execute the given vertex program.
+ * NOTE: we do everything in single-precision floating point; we don't
+ * currently observe the single/half/fixed-precision qualifiers.
+ * \param ctx - rendering context
+ * \param program - the fragment program to execute
+ * \param machine - machine state (register file)
+ * \param maxInst - max number of instructions to execute
+ * \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
+ */
+static GLboolean
+execute_program( GLcontext *ctx,
+ const struct fragment_program *program, GLuint maxInst,
+ struct fp_machine *machine, const struct sw_span *span,
+ GLuint column )
+{
+ GLuint pc;
+
+#if DEBUG_FRAG
+ printf("execute fragment program --------------------\n");
+#endif
+
+ for (pc = 0; pc < maxInst; pc++) {
+ const struct fp_instruction *inst = program->Instructions + pc;
+
+ if (ctx->FragmentProgram.CallbackEnabled &&
+ ctx->FragmentProgram.Callback) {
+ ctx->FragmentProgram.CurrentPosition = inst->StringPos;
+ ctx->FragmentProgram.Callback(program->Base.Target,
+ ctx->FragmentProgram.CallbackData);
+ }
+
+ switch (inst->Opcode) {
+ case FP_OPCODE_ABS:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = FABSF(a[0]);
+ result[1] = FABSF(a[1]);
+ result[2] = FABSF(a[2]);
+ result[3] = FABSF(a[3]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_ADD:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = a[0] + b[0];
+ result[1] = a[1] + b[1];
+ result[2] = a[2] + b[2];
+ result[3] = a[3] + b[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_CMP:
+ {
+ GLfloat a[4], b[4], c[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ fetch_vector4( ctx, &inst->SrcReg[2], machine, program, c );
+ result[0] = a[0] < 0.0F ? b[0] : c[0];
+ result[1] = a[1] < 0.0F ? b[1] : c[1];
+ result[2] = a[2] < 0.0F ? b[2] : c[2];
+ result[3] = a[3] < 0.0F ? b[3] : c[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_COS:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = result[1] = result[2] = result[3] = (GLfloat)_mesa_cos(a[0]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_DDX: /* Partial derivative with respect to X */
+ {
+ GLfloat a[4], aNext[4], result[4];
+ struct fp_machine dMachine;
+ if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'X',
+ column, result)) {
+ /* This is tricky. Make a copy of the current machine state,
+ * increment the input registers by the dx or dy partial
+ * derivatives, then re-execute the program up to the
+ * preceeding instruction, then fetch the source register.
+ * Finally, find the difference in the register values for
+ * the original and derivative runs.
+ */
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a);
+ init_machine_deriv(ctx, machine, program, span,
+ 'X', &dMachine);
+ execute_program(ctx, program, pc, &dMachine, span, column);
+ fetch_vector4( ctx, &inst->SrcReg[0], &dMachine, program, aNext );
+ result[0] = aNext[0] - a[0];
+ result[1] = aNext[1] - a[1];
+ result[2] = aNext[2] - a[2];
+ result[3] = aNext[3] - a[3];
+ }
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_DDY: /* Partial derivative with respect to Y */
+ {
+ GLfloat a[4], aNext[4], result[4];
+ struct fp_machine dMachine;
+ if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'Y',
+ column, result)) {
+ init_machine_deriv(ctx, machine, program, span,
+ 'Y', &dMachine);
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a);
+ execute_program(ctx, program, pc, &dMachine, span, column);
+ fetch_vector4( ctx, &inst->SrcReg[0], &dMachine, program, aNext );
+ result[0] = aNext[0] - a[0];
+ result[1] = aNext[1] - a[1];
+ result[2] = aNext[2] - a[2];
+ result[3] = aNext[3] - a[3];
+ }
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_DP3:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = result[1] = result[2] = result[3] =
+ a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("DP3 %g = (%g %g %g) . (%g %g %g)\n",
+ result[0], a[0], a[1], a[2], b[0], b[1], b[2]);
+#endif
+ }
+ break;
+ case FP_OPCODE_DP4:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = result[1] = result[2] = result[3] =
+ a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("DP4 %g = (%g, %g %g %g) . (%g, %g %g %g)\n",
+ result[0], a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
+#endif
+ }
+ break;
+ case FP_OPCODE_DPH:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = result[1] = result[2] = result[3] =
+ a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + b[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_DST: /* Distance vector */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = 1.0F;
+ result[1] = a[1] * b[1];
+ result[2] = a[2];
+ result[3] = b[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_EX2: /* Exponential base 2 */
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = result[1] = result[2] = result[3] =
+ (GLfloat) _mesa_pow(2.0, a[0]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_FLR:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = FLOORF(a[0]);
+ result[1] = FLOORF(a[1]);
+ result[2] = FLOORF(a[2]);
+ result[3] = FLOORF(a[3]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_FRC:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = a[0] - FLOORF(a[0]);
+ result[1] = a[1] - FLOORF(a[1]);
+ result[2] = a[2] - FLOORF(a[2]);
+ result[3] = a[3] - FLOORF(a[3]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_KIL_NV: /* NV_f_p only */
+ {
+ const GLuint swizzle = inst->DstReg.CondSwizzle;
+ const GLuint condMask = inst->DstReg.CondMask;
+ if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
+ test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
+ test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
+ test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
+ return GL_FALSE;
+ }
+ }
+ break;
+ case FP_OPCODE_KIL: /* ARB_f_p only */
+ {
+ GLfloat a[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ if (a[0] < 0.0F || a[1] < 0.0F || a[2] < 0.0F || a[3] < 0.0F) {
+ return GL_FALSE;
+ }
+ }
+ break;
+ case FP_OPCODE_LG2: /* log base 2 */
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = result[1] = result[2] = result[3]
+ = LOG2(a[0]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_LIT:
+ {
+ const GLfloat epsilon = 1.0F / 256.0F; /* from NV VP spec */
+ GLfloat a[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ a[0] = MAX2(a[0], 0.0F);
+ a[1] = MAX2(a[1], 0.0F);
+ /* XXX ARB version clamps a[3], NV version doesn't */
+ a[3] = CLAMP(a[3], -(128.0F - epsilon), (128.0F - epsilon));
+ result[0] = 1.0F;
+ result[1] = a[0];
+ /* XXX we could probably just use pow() here */
+ if (a[0] > 0.0F) {
+ if (a[1] == 0.0 && a[3] == 0.0)
+ result[2] = 1.0;
+ else
+ result[2] = EXPF(a[3] * LOGF(a[1]));
+ }
+ else {
+ result[2] = 0.0;
+ }
+ result[3] = 1.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_LRP:
+ {
+ GLfloat a[4], b[4], c[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ fetch_vector4( ctx, &inst->SrcReg[2], machine, program, c );
+ result[0] = a[0] * b[0] + (1.0F - a[0]) * c[0];
+ result[1] = a[1] * b[1] + (1.0F - a[1]) * c[1];
+ result[2] = a[2] * b[2] + (1.0F - a[2]) * c[2];
+ result[3] = a[3] * b[3] + (1.0F - a[3]) * c[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_MAD:
+ {
+ GLfloat a[4], b[4], c[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ fetch_vector4( ctx, &inst->SrcReg[2], machine, program, c );
+ result[0] = a[0] * b[0] + c[0];
+ result[1] = a[1] * b[1] + c[1];
+ result[2] = a[2] * b[2] + c[2];
+ result[3] = a[3] * b[3] + c[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_MAX:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = MAX2(a[0], b[0]);
+ result[1] = MAX2(a[1], b[1]);
+ result[2] = MAX2(a[2], b[2]);
+ result[3] = MAX2(a[3], b[3]);
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("MAX (%g %g %g %g) = (%g %g %g %g), (%g %g %g %g)\n",
+ result[0], result[1], result[2], result[3],
+ a[0], a[1], a[2], a[3],
+ b[0], b[1], b[2], b[3]);
+#endif
+ }
+ break;
+ case FP_OPCODE_MIN:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = MIN2(a[0], b[0]);
+ result[1] = MIN2(a[1], b[1]);
+ result[2] = MIN2(a[2], b[2]);
+ result[3] = MIN2(a[3], b[3]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_MOV:
+ {
+ GLfloat result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, result );
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("MOV (%g %g %g %g)\n",
+ result[0], result[1], result[2], result[3]);
+#endif
+ }
+ break;
+ case FP_OPCODE_MUL:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = a[0] * b[0];
+ result[1] = a[1] * b[1];
+ result[2] = a[2] * b[2];
+ result[3] = a[3] * b[3];
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("MUL (%g %g %g %g) = (%g %g %g %g) * (%g %g %g %g)\n",
+ result[0], result[1], result[2], result[3],
+ a[0], a[1], a[2], a[3],
+ b[0], b[1], b[2], b[3]);
+#endif
+ }
+ break;
+ case FP_OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */
+ {
+ GLfloat a[4], result[4];
+ GLhalfNV hx, hy;
+ GLuint *rawResult = (GLuint *) result;
+ GLuint twoHalves;
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ hx = _mesa_float_to_half(a[0]);
+ hy = _mesa_float_to_half(a[1]);
+ twoHalves = hx | (hy << 16);
+ rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
+ = twoHalves;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */
+ {
+ GLfloat a[4], result[4];
+ GLuint usx, usy, *rawResult = (GLuint *) result;
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ a[0] = CLAMP(a[0], 0.0F, 1.0F);
+ a[1] = CLAMP(a[1], 0.0F, 1.0F);
+ usx = IROUND(a[0] * 65535.0F);
+ usy = IROUND(a[1] * 65535.0F);
+ rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
+ = usx | (usy << 16);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */
+ {
+ GLfloat a[4], result[4];
+ GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result;
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ a[0] = CLAMP(a[0], -128.0F / 127.0F, 1.0F);
+ a[1] = CLAMP(a[1], -128.0F / 127.0F, 1.0F);
+ a[2] = CLAMP(a[2], -128.0F / 127.0F, 1.0F);
+ a[3] = CLAMP(a[3], -128.0F / 127.0F, 1.0F);
+ ubx = IROUND(127.0F * a[0] + 128.0F);
+ uby = IROUND(127.0F * a[1] + 128.0F);
+ ubz = IROUND(127.0F * a[2] + 128.0F);
+ ubw = IROUND(127.0F * a[3] + 128.0F);
+ rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
+ = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */
+ {
+ GLfloat a[4], result[4];
+ GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result;
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ a[0] = CLAMP(a[0], 0.0F, 1.0F);
+ a[1] = CLAMP(a[1], 0.0F, 1.0F);
+ a[2] = CLAMP(a[2], 0.0F, 1.0F);
+ a[3] = CLAMP(a[3], 0.0F, 1.0F);
+ ubx = IROUND(255.0F * a[0]);
+ uby = IROUND(255.0F * a[1]);
+ ubz = IROUND(255.0F * a[2]);
+ ubw = IROUND(255.0F * a[3]);
+ rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
+ = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_POW:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector1( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = result[1] = result[2] = result[3]
+ = (GLfloat)_mesa_pow(a[0], b[0]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_RCP:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+#if DEBUG_FRAG
+ if (a[0] == 0)
+ printf("RCP(0)\n");
+ else if (IS_INF_OR_NAN(a[0]))
+ printf("RCP(inf)\n");
+#endif
+ result[0] = result[1] = result[2] = result[3]
+ = 1.0F / a[0];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_RFL:
+ {
+ GLfloat axis[4], dir[4], result[4], tmp[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, axis );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, dir );
+ tmp[3] = axis[0] * axis[0]
+ + axis[1] * axis[1]
+ + axis[2] * axis[2];
+ tmp[0] = (2.0F * (axis[0] * dir[0] +
+ axis[1] * dir[1] +
+ axis[2] * dir[2])) / tmp[3];
+ result[0] = tmp[0] * axis[0] - dir[0];
+ result[1] = tmp[0] * axis[1] - dir[1];
+ result[2] = tmp[0] * axis[2] - dir[2];
+ /* result[3] is never written! XXX enforce in parser! */
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_RSQ: /* 1 / sqrt() */
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ a[0] = FABSF(a[0]);
+ result[0] = result[1] = result[2] = result[3] = INV_SQRTF(a[0]);
+ store_vector4( inst, machine, result );
+#if DEBUG_FRAG
+ printf("RSQ %g = 1/sqrt(|%g|)\n", result[0], a[0]);
+#endif
+ }
+ break;
+ case FP_OPCODE_SCS: /* sine and cos */
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = (GLfloat)cos(a[0]);
+ result[1] = (GLfloat)sin(a[0]);
+ result[2] = 0.0; /* undefined! */
+ result[3] = 0.0; /* undefined! */
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SEQ: /* set on equal */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] == b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] == b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] == b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] == b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SFL: /* set false, operands ignored */
+ {
+ static const GLfloat result[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SGE: /* set on greater or equal */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] >= b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] >= b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] >= b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] >= b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SGT: /* set on greater */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] > b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] > b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] > b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] > b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SIN:
+ {
+ GLfloat a[4], result[4];
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = result[1] = result[2] =
+ result[3] = (GLfloat)_mesa_sin(a[0]);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SLE: /* set on less or equal */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] <= b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] <= b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] <= b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] <= b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SLT: /* set on less */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] < b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] < b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] < b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] < b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SNE: /* set on not equal */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = (a[0] != b[0]) ? 1.0F : 0.0F;
+ result[1] = (a[1] != b[1]) ? 1.0F : 0.0F;
+ result[2] = (a[2] != b[2]) ? 1.0F : 0.0F;
+ result[3] = (a[3] != b[3]) ? 1.0F : 0.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_STR: /* set true, operands ignored */
+ {
+ static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F };
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SUB:
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = a[0] - b[0];
+ result[1] = a[1] - b[1];
+ result[2] = a[2] - b[2];
+ result[3] = a[3] - b[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_SWZ:
+ {
+ const struct fp_src_register *source = &inst->SrcReg[0];
+ const GLfloat *src = get_register_pointer(ctx, source,
+ machine, program);
+ GLfloat result[4];
+ GLuint i;
+
+ /* do extended swizzling here */
+ for (i = 0; i < 4; i++) {
+ if (GET_SWZ(source->Swizzle, i) == SWIZZLE_ZERO)
+ result[i] = 0.0;
+ else if (GET_SWZ(source->Swizzle, i) == SWIZZLE_ONE)
+ result[i] = 1.0;
+ else
+ result[i] = src[GET_SWZ(source->Swizzle, i)];
+
+ if (source->NegateBase & (1 << i))
+ result[i] = -result[i];
+ }
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_TEX: /* Both ARB and NV frag prog */
+ /* Texel lookup */
+ {
+ GLfloat texcoord[4], color[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+ /* Note: we pass 0 for LOD. The ARB extension requires it
+ * while the NV extension says it's implementation dependant.
+ */
+ /* KW: Previously lambda was passed as zero, but I
+ * believe this is incorrect, the spec seems to
+ * indicate rather that lambda should not be
+ * changed/biased, unlike TXB where texcoord[3] is
+ * added to the lambda calculations. The lambda should
+ * still be calculated normally for TEX & TXP though,
+ * not set to zero. Otherwise it's very difficult to
+ * implement normal GL semantics through the fragment
+ * shader.
+ */
+ fetch_texel( ctx, texcoord,
+ span->array->lambda[inst->TexSrcUnit][column],
+ inst->TexSrcUnit, color );
+ store_vector4( inst, machine, color );
+ }
+ break;
+ case FP_OPCODE_TXB: /* GL_ARB_fragment_program only */
+ /* Texel lookup with LOD bias */
+ {
+ GLfloat texcoord[4], color[4], bias, lambda;
+
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+ /* texcoord[3] is the bias to add to lambda */
+ bias = ctx->Texture.Unit[inst->TexSrcUnit].LodBias
+ + ctx->Texture.Unit[inst->TexSrcUnit]._Current->LodBias
+ + texcoord[3];
+ lambda = span->array->lambda[inst->TexSrcUnit][column] + bias;
+ fetch_texel( ctx, texcoord, lambda,
+ inst->TexSrcUnit, color );
+ store_vector4( inst, machine, color );
+ }
+ break;
+ case FP_OPCODE_TXD: /* GL_NV_fragment_program only */
+ /* Texture lookup w/ partial derivatives for LOD */
+ {
+ GLfloat texcoord[4], dtdx[4], dtdy[4], color[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, dtdx );
+ fetch_vector4( ctx, &inst->SrcReg[2], machine, program, dtdy );
+ fetch_texel_deriv( ctx, texcoord, dtdx, dtdy, inst->TexSrcUnit,
+ color );
+ store_vector4( inst, machine, color );
+ }
+ break;
+ case FP_OPCODE_TXP: /* GL_ARB_fragment_program only */
+ /* Texture lookup w/ projective divide */
+ {
+ GLfloat texcoord[4], color[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+ /* Not so sure about this test - if texcoord[3] is
+ * zero, we'd probably be fine except for an ASSERT in
+ * IROUND_POS() which gets triggered by the inf values created.
+ */
+ if (texcoord[3] != 0.0) {
+ texcoord[0] /= texcoord[3];
+ texcoord[1] /= texcoord[3];
+ texcoord[2] /= texcoord[3];
+ }
+ /* KW: Previously lambda was passed as zero, but I
+ * believe this is incorrect, the spec seems to
+ * indicate rather that lambda should not be
+ * changed/biased, unlike TXB where texcoord[3] is
+ * added to the lambda calculations. The lambda should
+ * still be calculated normally for TEX & TXP though,
+ * not set to zero.
+ */
+ fetch_texel( ctx, texcoord,
+ span->array->lambda[inst->TexSrcUnit][column],
+ inst->TexSrcUnit, color );
+ store_vector4( inst, machine, color );
+ }
+ break;
+ case FP_OPCODE_TXP_NV: /* GL_NV_fragment_program only */
+ /* Texture lookup w/ projective divide */
+ {
+ GLfloat texcoord[4], color[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+ if (inst->TexSrcIdx != TEXTURE_CUBE_INDEX &&
+ texcoord[3] != 0.0) {
+ texcoord[0] /= texcoord[3];
+ texcoord[1] /= texcoord[3];
+ texcoord[2] /= texcoord[3];
+ }
+ fetch_texel( ctx, texcoord,
+ span->array->lambda[inst->TexSrcUnit][column],
+ inst->TexSrcUnit, color );
+ store_vector4( inst, machine, color );
+ }
+ break;
+ case FP_OPCODE_UP2H: /* unpack two 16-bit floats */
+ {
+ GLfloat a[4], result[4];
+ const GLuint *rawBits = (const GLuint *) a;
+ GLhalfNV hx, hy;
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ hx = rawBits[0] & 0xffff;
+ hy = rawBits[0] >> 16;
+ result[0] = result[2] = _mesa_half_to_float(hx);
+ result[1] = result[3] = _mesa_half_to_float(hy);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_UP2US: /* unpack two GLushorts */
+ {
+ GLfloat a[4], result[4];
+ const GLuint *rawBits = (const GLuint *) a;
+ GLushort usx, usy;
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ usx = rawBits[0] & 0xffff;
+ usy = rawBits[0] >> 16;
+ result[0] = result[2] = usx * (1.0f / 65535.0f);
+ result[1] = result[3] = usy * (1.0f / 65535.0f);
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_UP4B: /* unpack four GLbytes */
+ {
+ GLfloat a[4], result[4];
+ const GLuint *rawBits = (const GLuint *) a;
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = (((rawBits[0] >> 0) & 0xff) - 128) / 127.0F;
+ result[1] = (((rawBits[0] >> 8) & 0xff) - 128) / 127.0F;
+ result[2] = (((rawBits[0] >> 16) & 0xff) - 128) / 127.0F;
+ result[3] = (((rawBits[0] >> 24) & 0xff) - 128) / 127.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_UP4UB: /* unpack four GLubytes */
+ {
+ GLfloat a[4], result[4];
+ const GLuint *rawBits = (const GLuint *) a;
+ fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+ result[0] = ((rawBits[0] >> 0) & 0xff) / 255.0F;
+ result[1] = ((rawBits[0] >> 8) & 0xff) / 255.0F;
+ result[2] = ((rawBits[0] >> 16) & 0xff) / 255.0F;
+ result[3] = ((rawBits[0] >> 24) & 0xff) / 255.0F;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_XPD: /* cross product */
+ {
+ GLfloat a[4], b[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ result[0] = a[1] * b[2] - a[2] * b[1];
+ result[1] = a[2] * b[0] - a[0] * b[2];
+ result[2] = a[0] * b[1] - a[1] * b[0];
+ result[3] = 1.0;
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_X2D: /* 2-D matrix transform */
+ {
+ GLfloat a[4], b[4], c[4], result[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+ fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+ fetch_vector4( ctx, &inst->SrcReg[2], machine, program, c );
+ result[0] = a[0] + b[0] * c[0] + b[1] * c[1];
+ result[1] = a[1] + b[0] * c[2] + b[1] * c[3];
+ result[2] = a[2] + b[0] * c[0] + b[1] * c[1];
+ result[3] = a[3] + b[0] * c[2] + b[1] * c[3];
+ store_vector4( inst, machine, result );
+ }
+ break;
+ case FP_OPCODE_PRINT:
+ {
+ if (inst->SrcReg[0].File != -1) {
+ GLfloat a[4];
+ fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a);
+ _mesa_printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,
+ a[0], a[1], a[2], a[3]);
+ }
+ else {
+ _mesa_printf("%s\n", (const char *) inst->Data);
+ }
+ }
+ break;
+ case FP_OPCODE_END:
+ return GL_TRUE;
+ default:
+ _mesa_problem(ctx, "Bad opcode %d in _mesa_exec_fragment_program",
+ inst->Opcode);
+ return GL_TRUE; /* return value doesn't matter */
+ }
+ }
+ return GL_TRUE;
+}
+
+
+static void
+init_machine( GLcontext *ctx, struct fp_machine *machine,
+ const struct fragment_program *program,
+ const struct sw_span *span, GLuint col )
+{
+ GLuint inputsRead = program->InputsRead;
+ GLuint u;
+
+ if (ctx->FragmentProgram.CallbackEnabled)
+ inputsRead = ~0;
+
+ if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
+ /* Clear temporary registers (undefined for ARB_f_p) */
+ _mesa_bzero(machine->Temporaries,
+ MAX_NV_FRAGMENT_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
+ }
+
+ /* Load input registers */
+ if (inputsRead & (1 << FRAG_ATTRIB_WPOS)) {
+ GLfloat *wpos = machine->Inputs[FRAG_ATTRIB_WPOS];
+ ASSERT(span->arrayMask & SPAN_Z);
+ wpos[0] = (GLfloat) span->x + col;
+ wpos[1] = (GLfloat) span->y;
+ wpos[2] = (GLfloat) span->array->z[col] / ctx->DrawBuffer->_DepthMaxF;
+ wpos[3] = span->w + col * span->dwdx;
+ }
+ if (inputsRead & (1 << FRAG_ATTRIB_COL0)) {
+ GLfloat *col0 = machine->Inputs[FRAG_ATTRIB_COL0];
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ col0[0] = CHAN_TO_FLOAT(span->array->rgba[col][RCOMP]);
+ col0[1] = CHAN_TO_FLOAT(span->array->rgba[col][GCOMP]);
+ col0[2] = CHAN_TO_FLOAT(span->array->rgba[col][BCOMP]);
+ col0[3] = CHAN_TO_FLOAT(span->array->rgba[col][ACOMP]);
+ }
+ if (inputsRead & (1 << FRAG_ATTRIB_COL1)) {
+ GLfloat *col1 = machine->Inputs[FRAG_ATTRIB_COL1];
+ col1[0] = CHAN_TO_FLOAT(span->array->spec[col][RCOMP]);
+ col1[1] = CHAN_TO_FLOAT(span->array->spec[col][GCOMP]);
+ col1[2] = CHAN_TO_FLOAT(span->array->spec[col][BCOMP]);
+ col1[3] = CHAN_TO_FLOAT(span->array->spec[col][ACOMP]);
+ }
+ if (inputsRead & (1 << FRAG_ATTRIB_FOGC)) {
+ GLfloat *fogc = machine->Inputs[FRAG_ATTRIB_FOGC];
+ ASSERT(span->arrayMask & SPAN_FOG);
+ fogc[0] = span->array->fog[col];
+ fogc[1] = 0.0F;
+ fogc[2] = 0.0F;
+ fogc[3] = 0.0F;
+ }
+ for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
+ if (inputsRead & (1 << (FRAG_ATTRIB_TEX0 + u))) {
+ GLfloat *tex = machine->Inputs[FRAG_ATTRIB_TEX0 + u];
+ /*ASSERT(ctx->Texture._EnabledCoordUnits & (1 << u));*/
+ COPY_4V(tex, span->array->texcoords[u][col]);
+ /*ASSERT(tex[0] != 0 || tex[1] != 0 || tex[2] != 0);*/
+ }
+ }
+
+ /* init condition codes */
+ machine->CondCodes[0] = COND_EQ;
+ machine->CondCodes[1] = COND_EQ;
+ machine->CondCodes[2] = COND_EQ;
+ machine->CondCodes[3] = COND_EQ;
+}
+
+
+
+/**
+ * Execute the current fragment program, operating on the given span.
+ */
+void
+_swrast_exec_fragment_program( GLcontext *ctx, struct sw_span *span )
+{
+ const struct fragment_program *program = ctx->FragmentProgram._Current;
+ GLuint i;
+
+ ctx->_CurrentProgram = GL_FRAGMENT_PROGRAM_ARB; /* or NV, doesn't matter */
+
+ if (program->Parameters) {
+ _mesa_load_state_parameters(ctx, program->Parameters);
+ }
+
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ init_machine(ctx, &ctx->FragmentProgram.Machine,
+ ctx->FragmentProgram._Current, span, i);
+
+#ifdef USE_TCC
+ if (!_swrast_execute_codegen_program(ctx, program, ~0,
+ &ctx->FragmentProgram.Machine,
+ span, i)) {
+ span->array->mask[i] = GL_FALSE; /* killed fragment */
+ span->writeAll = GL_FALSE;
+ }
+#else
+ if (!execute_program(ctx, program, ~0,
+ &ctx->FragmentProgram.Machine, span, i)) {
+ span->array->mask[i] = GL_FALSE; /* killed fragment */
+ span->writeAll = GL_FALSE;
+ }
+#endif
+
+ /* Store output registers */
+ {
+ const GLfloat *colOut
+ = ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLR];
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][RCOMP], colOut[0]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][GCOMP], colOut[1]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][BCOMP], colOut[2]);
+ UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][ACOMP], colOut[3]);
+ }
+ /* depth value */
+ if (program->OutputsWritten & (1 << FRAG_OUTPUT_DEPR)) {
+ const GLfloat depth
+ = ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_DEPR][2];
+ span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
+ }
+ }
+ }
+
+ if (program->OutputsWritten & (1 << FRAG_OUTPUT_DEPR)) {
+ span->interpMask &= ~SPAN_Z;
+ span->arrayMask |= SPAN_Z;
+ }
+
+ ctx->_CurrentProgram = 0;
+}
+
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.h
new file mode 100644
index 000000000..ac5a15fe9
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_nvfragprog.h
@@ -0,0 +1,37 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * 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_NVFRAGPROG_H
+#define S_NVFRAGPROG_H
+
+
+#include "s_context.h"
+
+
+extern void
+_swrast_exec_fragment_program( GLcontext *ctx, struct sw_span *span );
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c
new file mode 100644
index 000000000..1c65290d4
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c
@@ -0,0 +1,111 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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.
+ */
+
+
+/*
+ * This file implements both the GL_SGIX_pixel_texture and
+ * GL_SIGS_pixel_texture extensions. Luckily, they pretty much
+ * overlap in functionality so we use the same state variables
+ * and execution code for both.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "imports.h"
+
+#include "s_context.h"
+#include "s_pixeltex.h"
+#include "s_texture.h"
+
+
+/*
+ * Convert RGBA values into strq texture coordinates.
+ */
+static void
+pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
+ GLfloat texcoord[][4])
+{
+ if (ctx->Pixel.FragmentRgbSource == GL_CURRENT_RASTER_COLOR) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ texcoord[i][0] = ctx->Current.RasterColor[RCOMP];
+ texcoord[i][1] = ctx->Current.RasterColor[GCOMP];
+ texcoord[i][2] = ctx->Current.RasterColor[BCOMP];
+ }
+ }
+ else {
+ GLuint i;
+ ASSERT(ctx->Pixel.FragmentRgbSource == GL_PIXEL_GROUP_COLOR_SGIS);
+ for (i = 0; i < n; i++) {
+ texcoord[i][0] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
+ texcoord[i][1] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
+ texcoord[i][2] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
+ }
+ }
+
+ if (ctx->Pixel.FragmentAlphaSource == GL_CURRENT_RASTER_COLOR) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ texcoord[i][3] = ctx->Current.RasterColor[ACOMP];
+ }
+ }
+ else {
+ GLuint i;
+ ASSERT(ctx->Pixel.FragmentAlphaSource == GL_PIXEL_GROUP_COLOR_SGIS);
+ for (i = 0; i < n; i++) {
+ texcoord[i][3] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
+ }
+ }
+}
+
+
+
+/*
+ * Used by glDraw/CopyPixels: the incoming image colors are treated
+ * as texture coordinates. Use those coords to texture the image.
+ * This is for GL_SGIS_pixel_texture / GL_SGIX_pixel_texture.
+ */
+void
+_swrast_pixel_texture(GLcontext *ctx, struct sw_span *span)
+{
+ GLuint unit;
+
+ ASSERT(!(span->arrayMask & SPAN_TEXTURE));
+ span->arrayMask |= SPAN_TEXTURE;
+ span->interpMask &= ~SPAN_TEXTURE;
+
+ /* convert colors into texture coordinates */
+ pixeltexgen( ctx, span->end,
+ (const GLchan (*)[4]) span->array->rgba,
+ span->array->texcoords[0] );
+
+ /* copy the new texture units for all enabled units */
+ for (unit = 1; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ MEMCPY( span->array->texcoords[unit], span->array->texcoords[0],
+ span->end * 4 * sizeof(GLfloat) );
+ }
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.h
new file mode 100644
index 000000000..6ef7a44df
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.h
@@ -0,0 +1,38 @@
+
+/*
+ * 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_PIXELTEX_H
+#define S_PIXELTEX_H
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern void
+_swrast_pixel_texture(GLcontext *ctx, struct sw_span *span);
+
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_points.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_points.c
new file mode 100644
index 000000000..5879bccf1
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_points.c
@@ -0,0 +1,275 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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 "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "macros.h"
+#include "texstate.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_points.h"
+#include "s_span.h"
+
+
+
+#define RGBA 0x1
+#define INDEX 0x2
+#define SMOOTH 0x4
+#define TEXTURE 0x8
+#define SPECULAR 0x10
+#define LARGE 0x20
+#define ATTENUATE 0x40
+#define SPRITE 0x80
+
+
+/*
+ * CI points with size == 1.0
+ */
+#define FLAGS (INDEX)
+#define NAME size1_ci_point
+#include "s_pointtemp.h"
+
+
+/*
+ * General CI points.
+ */
+#define FLAGS (INDEX | LARGE)
+#define NAME general_ci_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Antialiased CI points.
+ */
+#define FLAGS (INDEX | SMOOTH)
+#define NAME antialiased_ci_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Distance attenuated, general CI points.
+ */
+#define FLAGS (INDEX | ATTENUATE)
+#define NAME atten_general_ci_point
+#include "s_pointtemp.h"
+
+
+/*
+ * RGBA points with size == 1.0
+ */
+#define FLAGS (RGBA)
+#define NAME size1_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * General RGBA points.
+ */
+#define FLAGS (RGBA | LARGE)
+#define NAME general_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Antialiased RGBA points.
+ */
+#define FLAGS (RGBA | SMOOTH)
+#define NAME antialiased_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Textured RGBA points.
+ */
+#define FLAGS (RGBA | LARGE | TEXTURE | SPECULAR)
+#define NAME textured_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Antialiased points with texture mapping.
+ */
+#define FLAGS (RGBA | SMOOTH | TEXTURE | SPECULAR)
+#define NAME antialiased_tex_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Distance attenuated, general RGBA points.
+ */
+#define FLAGS (RGBA | ATTENUATE)
+#define NAME atten_general_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Distance attenuated, textured RGBA points.
+ */
+#define FLAGS (RGBA | ATTENUATE | TEXTURE | SPECULAR)
+#define NAME atten_textured_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Distance attenuated, antialiased points with or without texture mapping.
+ */
+#define FLAGS (RGBA | ATTENUATE | TEXTURE | SMOOTH)
+#define NAME atten_antialiased_rgba_point
+#include "s_pointtemp.h"
+
+
+/*
+ * Sprite (textured point)
+ */
+#define FLAGS (RGBA | SPRITE | SPECULAR)
+#define NAME sprite_point
+#include "s_pointtemp.h"
+
+
+#define FLAGS (RGBA | SPRITE | SPECULAR | ATTENUATE)
+#define NAME atten_sprite_point
+#include "s_pointtemp.h"
+
+
+
+void _swrast_add_spec_terms_point( GLcontext *ctx,
+ const SWvertex *v0 )
+{
+ SWvertex *ncv0 = (SWvertex *)v0;
+ GLchan c[1][4];
+ COPY_CHAN4( c[0], ncv0->color );
+ ACC_3V( ncv0->color, ncv0->specular );
+ SWRAST_CONTEXT(ctx)->SpecPoint( ctx, ncv0 );
+ COPY_CHAN4( ncv0->color, c[0] );
+}
+
+
+
+/* record the current point function name */
+#ifdef DEBUG
+
+static const char *pntFuncName = NULL;
+
+#define USE(pntFunc) \
+do { \
+ pntFuncName = #pntFunc; \
+ /*printf("%s\n", pntFuncName);*/ \
+ swrast->Point = pntFunc; \
+} while (0)
+
+#else
+
+#define USE(pntFunc) swrast->Point = pntFunc
+
+#endif
+
+
+/*
+ * Examine the current context to determine which point drawing function
+ * should be used.
+ */
+void
+_swrast_choose_point( GLcontext *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean rgbMode = ctx->Visual.rgbMode;
+
+ if (ctx->RenderMode==GL_RENDER) {
+ if (ctx->Point.PointSprite) {
+ /* GL_ARB_point_sprite / GL_NV_point_sprite */
+ /* XXX this might not be good enough */
+ if (ctx->Point._Attenuated)
+ USE(atten_sprite_point);
+ else
+ USE(sprite_point);
+ }
+ else if (ctx->Point.SmoothFlag) {
+ /* Smooth points */
+ if (rgbMode) {
+ if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ USE(atten_antialiased_rgba_point);
+ }
+ else if (ctx->Texture._EnabledCoordUnits) {
+ USE(antialiased_tex_rgba_point);
+ }
+ else {
+ USE(antialiased_rgba_point);
+ }
+ }
+ else {
+ USE(antialiased_ci_point);
+ }
+ }
+ else if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ if (rgbMode) {
+ if (ctx->Texture._EnabledCoordUnits) {
+ if (ctx->Point.SmoothFlag) {
+ USE(atten_antialiased_rgba_point);
+ }
+ else {
+ USE(atten_textured_rgba_point);
+ }
+ }
+ else {
+ USE(atten_general_rgba_point);
+ }
+ }
+ else {
+ /* ci, atten */
+ USE(atten_general_ci_point);
+ }
+ }
+ else if (ctx->Texture._EnabledCoordUnits && rgbMode) {
+ /* textured */
+ USE(textured_rgba_point);
+ }
+ else if (ctx->Point._Size != 1.0) {
+ /* large points */
+ if (rgbMode) {
+ USE(general_rgba_point);
+ }
+ else {
+ USE(general_ci_point);
+ }
+ }
+ else {
+ /* single pixel points */
+ if (rgbMode) {
+ USE(size1_rgba_point);
+ }
+ else {
+ USE(size1_ci_point);
+ }
+ }
+ }
+ else if (ctx->RenderMode==GL_FEEDBACK) {
+ USE(_swrast_feedback_point);
+ }
+ else {
+ /* GL_SELECT mode */
+ USE(_swrast_select_point);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_points.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_points.h
new file mode 100644
index 000000000..40b442e95
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_points.h
@@ -0,0 +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 "mtypes.h"
+
+extern void
+_swrast_choose_point( GLcontext *ctx );
+
+extern void
+_swrast_add_spec_terms_point( GLcontext *ctx,
+ const SWvertex *v0 );
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_pointtemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_pointtemp.h
new file mode 100644
index 000000000..4ce261009
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_pointtemp.h
@@ -0,0 +1,419 @@
+/*
+ * 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.
+ */
+
+/*
+ * Regarding GL_NV_point_sprite:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
+
+
+/*
+ * Point rendering template code.
+ *
+ * Set FLAGS = bitwise-OR of the following tokens:
+ *
+ * RGBA = do rgba instead of color index
+ * SMOOTH = do antialiasing
+ * TEXTURE = do texture coords
+ * SPECULAR = do separate specular color
+ * LARGE = do points with diameter > 1 pixel
+ * ATTENUATE = compute point size attenuation
+ * SPRITE = GL_ARB_point_sprite / GL_NV_point_sprite
+ *
+ * Notes: LARGE and ATTENUATE are exclusive of each other.
+ * TEXTURE requires RGBA
+ */
+
+
+/*
+ * NOTES on antialiased point rasterization:
+ *
+ * Let d = distance of fragment center from vertex.
+ * if d < rmin2 then
+ * fragment has 100% coverage
+ * else if d > rmax2 then
+ * fragment has 0% coverage
+ * else
+ * fragment has % coverage = (d - rmin2) / (rmax2 - rmin2)
+ */
+
+
+
+static void
+NAME ( GLcontext *ctx, const SWvertex *vert )
+{
+#if FLAGS & (ATTENUATE | LARGE | SMOOTH | SPRITE)
+ GLfloat size;
+#endif
+#if FLAGS & RGBA
+#if (FLAGS & ATTENUATE) && (FLAGS & SMOOTH)
+ GLfloat alphaAtten;
+#endif
+ const GLchan red = vert->color[0];
+ const GLchan green = vert->color[1];
+ const GLchan blue = vert->color[2];
+ const GLchan alpha = vert->color[3];
+#endif
+#if FLAGS & SPECULAR
+ const GLchan specRed = vert->specular[0];
+ const GLchan specGreen = vert->specular[1];
+ const GLchan specBlue = vert->specular[2];
+#endif
+#if FLAGS & INDEX
+ const GLuint colorIndex = (GLuint) vert->index; /* XXX round? */
+#endif
+#if FLAGS & TEXTURE
+ GLfloat texcoord[MAX_TEXTURE_COORD_UNITS][4];
+ GLuint u;
+#endif
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct sw_span *span = &(swrast->PointSpan);
+
+ /* Cull primitives with malformed coordinates.
+ */
+ {
+ float tmp = vert->win[0] + vert->win[1];
+ if (IS_INF_OR_NAN(tmp))
+ return;
+ }
+
+ /*
+ * Span init
+ */
+ span->interpMask = SPAN_FOG;
+ span->arrayMask = SPAN_XY | SPAN_Z;
+ span->fog = vert->fog;
+ span->fogStep = 0.0;
+#if FLAGS & RGBA
+ span->arrayMask |= SPAN_RGBA;
+#endif
+#if FLAGS & SPECULAR
+ span->arrayMask |= SPAN_SPEC;
+#endif
+#if FLAGS & INDEX
+ span->arrayMask |= SPAN_INDEX;
+#endif
+#if FLAGS & TEXTURE
+ span->arrayMask |= SPAN_TEXTURE;
+ if (ctx->FragmentProgram._Active) {
+ /* Don't divide texture s,t,r by q (use TXP to do that) */
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
+ COPY_4V(texcoord[u], vert->texcoord[u]);
+ }
+ }
+ }
+ else {
+ /* Divide texture s,t,r by q here */
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
+ const GLfloat q = vert->texcoord[u][3];
+ const GLfloat invQ = (q == 0.0F || q == 1.0F) ? 1.0F : (1.0F / q);
+ texcoord[u][0] = vert->texcoord[u][0] * invQ;
+ texcoord[u][1] = vert->texcoord[u][1] * invQ;
+ texcoord[u][2] = vert->texcoord[u][2] * invQ;
+ texcoord[u][3] = q;
+ }
+ }
+ }
+ /* need these for fragment programs */
+ span->w = 1.0F;
+ span->dwdx = 0.0F;
+ span->dwdy = 0.0F;
+#endif
+#if FLAGS & SMOOTH
+ span->arrayMask |= SPAN_COVERAGE;
+#endif
+#if FLAGS & SPRITE
+ span->arrayMask |= SPAN_TEXTURE;
+#endif
+
+ /* Compute point size if not known to be one */
+#if FLAGS & ATTENUATE
+ /* first, clamp attenuated size to the user-specifed range */
+ size = CLAMP(vert->pointSize, ctx->Point.MinSize, ctx->Point.MaxSize);
+#if (FLAGS & RGBA) && (FLAGS & SMOOTH)
+ /* only if multisampling, compute the 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;
+ }
+#endif
+#elif FLAGS & (LARGE | SMOOTH | SPRITE)
+ /* constant, non-attenuated size */
+ size = ctx->Point._Size; /* this is already clamped */
+#endif
+
+
+#if FLAGS & (ATTENUATE | LARGE | SMOOTH | SPRITE)
+ /***
+ *** Multi-pixel points
+ ***/
+
+ /* do final clamping now */
+ if (ctx->Point.SmoothFlag) {
+ size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA);
+ }
+ else {
+ size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize);
+ }
+
+ {{
+ GLint x, y;
+ const GLfloat radius = 0.5F * size;
+ const GLint z = (GLint) (vert->win[2] + 0.5F);
+ GLuint count;
+#if FLAGS & SMOOTH
+ 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) (vert->win[0] - radius);
+ const GLint xmax = (GLint) (vert->win[0] + radius);
+ const GLint ymin = (GLint) (vert->win[1] - radius);
+ const GLint ymax = (GLint) (vert->win[1] + radius);
+#else
+ /* non-smooth */
+ GLint xmin, xmax, ymin, ymax;
+ GLint iSize = (GLint) (size + 0.5F);
+ GLint iRadius;
+ iSize = MAX2(1, iSize);
+ iRadius = iSize / 2;
+ if (iSize & 1) {
+ /* odd size */
+ xmin = (GLint) (vert->win[0] - iRadius);
+ xmax = (GLint) (vert->win[0] + iRadius);
+ ymin = (GLint) (vert->win[1] - iRadius);
+ ymax = (GLint) (vert->win[1] + iRadius);
+ }
+ else {
+ /* even size */
+ xmin = (GLint) vert->win[0] - iRadius + 1;
+ xmax = xmin + iSize - 1;
+ ymin = (GLint) vert->win[1] - iRadius + 1;
+ ymax = ymin + iSize - 1;
+ }
+#endif /*SMOOTH*/
+
+ /* check if we need to flush */
+ if (span->end + (xmax-xmin+1) * (ymax-ymin+1) >= MAX_WIDTH ||
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT))) {
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ span->end = 0;
+ }
+
+ /*
+ * OK, generate fragments
+ */
+ count = span->end;
+ (void) radius;
+ for (y = ymin; y <= ymax; y++) {
+ /* check if we need to flush */
+ if (count + (xmax-xmin+1) >= MAX_WIDTH) {
+ span->end = count;
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ count = span->end = 0;
+ }
+ for (x = xmin; x <= xmax; x++) {
+#if FLAGS & (SPRITE | TEXTURE)
+ GLuint u;
+#endif
+
+#if FLAGS & RGBA
+ span->array->rgba[count][RCOMP] = red;
+ span->array->rgba[count][GCOMP] = green;
+ span->array->rgba[count][BCOMP] = blue;
+ span->array->rgba[count][ACOMP] = alpha;
+#endif
+#if FLAGS & SPECULAR
+ span->array->spec[count][RCOMP] = specRed;
+ span->array->spec[count][GCOMP] = specGreen;
+ span->array->spec[count][BCOMP] = specBlue;
+#endif
+#if FLAGS & INDEX
+ span->array->index[count] = colorIndex;
+#endif
+#if FLAGS & TEXTURE
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
+ COPY_4V(span->array->texcoords[u][count], texcoord[u]);
+ }
+ }
+#endif
+
+#if FLAGS & SMOOTH
+ /* compute coverage */
+ {
+ const GLfloat dx = x - vert->win[0] + 0.5F;
+ const GLfloat dy = y - vert->win[1] + 0.5F;
+ const GLfloat dist2 = dx * dx + dy * dy;
+ if (dist2 < rmax2) {
+ if (dist2 >= rmin2) {
+ /* compute partial coverage */
+ span->array->coverage[count] = 1.0F - (dist2 - rmin2) * cscale;
+#if FLAGS & INDEX
+ /* coverage in [0,15] */
+ span->array->coverage[count] *= 15.0;
+#endif
+ }
+ else {
+ /* full coverage */
+ span->array->coverage[count] = 1.0F;
+ }
+
+ span->array->x[count] = x;
+ span->array->y[count] = y;
+ span->array->z[count] = z;
+
+#if (FLAGS & ATTENUATE) && (FLAGS & RGBA)
+ span->array->rgba[count][ACOMP] = (GLchan) (alpha * alphaAtten);
+#elif FLAGS & RGBA
+ span->array->rgba[count][ACOMP] = alpha;
+#endif /*ATTENUATE*/
+ count++;
+ } /*if*/
+ }
+
+#else /*SMOOTH*/
+
+ /* not smooth (square points) */
+ span->array->x[count] = x;
+ span->array->y[count] = y;
+ span->array->z[count] = z;
+
+#if FLAGS & SPRITE
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ if (ctx->Point.CoordReplace[u]) {
+ GLfloat s = 0.5F + (x + 0.5F - vert->win[0]) / size;
+ GLfloat t, r;
+ if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT)
+ t = 0.5F + (y + 0.5F - vert->win[1]) / size;
+ else /* GL_UPPER_LEFT */
+ t = 0.5F - (y + 0.5F - vert->win[1]) / size;
+ if (ctx->Point.SpriteRMode == GL_ZERO)
+ r = 0.0F;
+ else if (ctx->Point.SpriteRMode == GL_S)
+ r = vert->texcoord[u][0];
+ else /* GL_R */
+ r = vert->texcoord[u][2];
+ span->array->texcoords[u][count][0] = s;
+ span->array->texcoords[u][count][1] = t;
+ span->array->texcoords[u][count][2] = r;
+ span->array->texcoords[u][count][3] = 1.0F;
+ }
+ else {
+ COPY_4V(span->array->texcoords[u][count], vert->texcoord[u]);
+ }
+ }
+ }
+#endif /*SPRITE*/
+
+ count++; /* square point */
+
+#endif /*SMOOTH*/
+
+ } /*for x*/
+ } /*for y*/
+ span->end = count;
+ }}
+
+#else /* LARGE | ATTENUATE | SMOOTH | SPRITE */
+
+ /***
+ *** Single-pixel points
+ ***/
+ {{
+ GLuint count;
+
+ /* check if we need to flush */
+ if (span->end >= MAX_WIDTH ||
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT))) {
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ span->end = 0;
+ }
+
+ count = span->end;
+
+#if FLAGS & RGBA
+ span->array->rgba[count][RCOMP] = red;
+ span->array->rgba[count][GCOMP] = green;
+ span->array->rgba[count][BCOMP] = blue;
+ span->array->rgba[count][ACOMP] = alpha;
+#endif
+#if FLAGS & SPECULAR
+ span->array->spec[count][RCOMP] = specRed;
+ span->array->spec[count][GCOMP] = specGreen;
+ span->array->spec[count][BCOMP] = specBlue;
+#endif
+#if FLAGS & INDEX
+ span->array->index[count] = colorIndex;
+#endif
+#if FLAGS & TEXTURE
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ COPY_4V(span->array->texcoords[u][count], texcoord[u]);
+ }
+ }
+#endif
+
+ span->array->x[count] = (GLint) vert->win[0];
+ span->array->y[count] = (GLint) vert->win[1];
+ span->array->z[count] = (GLint) (vert->win[2] + 0.5F);
+ span->end = count + 1;
+ }}
+
+#endif /* LARGE || ATTENUATE || SMOOTH */
+
+ ASSERT(span->end <= MAX_WIDTH);
+}
+
+
+#undef FLAGS
+#undef NAME
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c
new file mode 100644
index 000000000..dda35044a
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c
@@ -0,0 +1,584 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4.1
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "colormac.h"
+#include "convolve.h"
+#include "context.h"
+#include "feedback.h"
+#include "image.h"
+#include "macros.h"
+#include "imports.h"
+#include "pixel.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_span.h"
+#include "s_stencil.h"
+
+
+
+/*
+ * Read a block of color index pixels.
+ */
+static void
+read_index_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ /*
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ */
+ GLint i, readWidth;
+
+ /* error checking */
+ if (ctx->Visual.rgbMode) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" );
+ return;
+ }
+
+ if (type != GL_BYTE &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_SHORT &&
+ type != GL_UNSIGNED_SHORT &&
+ type != GL_INT &&
+ type != GL_UNSIGNED_INT &&
+ type != GL_FLOAT) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(index type)");
+ return;
+ }
+
+ _swrast_use_read_buffer(ctx);
+
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
+ /* process image row by row */
+ for (i = 0; i < height; i++) {
+ GLuint index[MAX_WIDTH];
+ GLvoid *dest;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y + i, index);
+
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_COLOR_INDEX, type, i, 0);
+
+ _mesa_pack_index_span(ctx, readWidth, type, dest, index,
+ &ctx->Pack, ctx->_ImageTransferState);
+ }
+
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+
+/**
+ * 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_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLint readWidth;
+ GLboolean bias_or_scale;
+
+ /* Error checking */
+ if (ctx->ReadBuffer->Visual.depthBits <= 0 || !rb) {
+ /* No depth buffer */
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" );
+ return;
+ }
+
+ if (type != GL_BYTE &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_SHORT &&
+ type != GL_UNSIGNED_SHORT &&
+ type != GL_INT &&
+ type != GL_UNSIGNED_INT &&
+ type != GL_FLOAT) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(depth type)");
+ return;
+ }
+
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
+ bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
+
+ if (type==GL_UNSIGNED_SHORT && ctx->ReadBuffer->Visual.depthBits == 16
+ && !bias_or_scale && !packing->SwapBytes) {
+ /* Special case: directly read 16-bit unsigned depth values. */
+ GLint j;
+ for (j=0;j<height;j++,y++) {
+ GLdepth depth[MAX_WIDTH];
+ GLushort *dst = (GLushort*) _mesa_image_address2d(packing, pixels,
+ width, height, GL_DEPTH_COMPONENT, type, j, 0);
+ GLint i;
+ _swrast_read_depth_span(ctx, rb, width, x, y, depth);
+ for (i = 0; i < width; i++)
+ dst[i] = depth[i];
+ }
+ }
+ else if (type==GL_UNSIGNED_INT && ctx->ReadBuffer->Visual.depthBits == 32
+ && !bias_or_scale && !packing->SwapBytes) {
+ /* Special case: directly read 32-bit unsigned depth values. */
+ GLint j;
+ for (j=0;j<height;j++,y++) {
+ GLdepth *dst = (GLdepth *) _mesa_image_address2d(packing, pixels,
+ width, height, GL_DEPTH_COMPONENT, type, j, 0);
+ _swrast_read_depth_span(ctx, rb, width, x, y, dst);
+ }
+ }
+ else {
+ /* General case (slower) */
+ GLint j;
+ for (j=0;j<height;j++,y++) {
+ GLfloat depth[MAX_WIDTH];
+ GLvoid *dest;
+
+ _swrast_read_depth_span_float(ctx, rb, readWidth, x, y, depth);
+
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+
+ _mesa_pack_depth_span(ctx, readWidth, (GLdepth *) dest, type,
+ depth, 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_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLint j, readWidth;
+
+ if (type != GL_BYTE &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_SHORT &&
+ type != GL_UNSIGNED_SHORT &&
+ type != GL_INT &&
+ type != GL_UNSIGNED_INT &&
+ type != GL_FLOAT &&
+ type != GL_BITMAP) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(stencil type)");
+ return;
+ }
+
+ if (ctx->ReadBuffer->Visual.stencilBits <= 0 || !rb) {
+ /* No stencil buffer */
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" );
+ return;
+ }
+
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : 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, readWidth, x, y, stencil);
+
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_STENCIL_INDEX, type, j, 0);
+
+ _mesa_pack_stencil_span(ctx, readWidth, type, dest, stencil, packing);
+ }
+}
+
+
+
+/**
+ * Optimized glReadPixels for particular pixel formats:
+ * GL_UNSIGNED_BYTE, GL_RGBA
+ * when pixel scaling, biasing and mapping are disabled.
+ */
+static GLboolean
+read_fast_rgba_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ /* can't do scale, bias, mapping, etc */
+ if (ctx->_ImageTransferState)
+ return GL_FALSE;
+
+ /* can't do fancy pixel packing */
+ if (packing->Alignment != 1 || packing->SwapBytes || packing->LsbFirst)
+ return GL_FALSE;
+
+ {
+ GLint srcX = x;
+ GLint srcY = y;
+ GLint readWidth = width; /* actual width read */
+ GLint readHeight = height; /* actual height read */
+ GLint skipPixels = packing->SkipPixels;
+ GLint skipRows = packing->SkipRows;
+ GLint rowLength;
+
+ if (packing->RowLength > 0)
+ rowLength = packing->RowLength;
+ else
+ rowLength = width;
+
+ /*
+ * Ready to read!
+ * The window region at (destX, destY) of size (readWidth, readHeight)
+ * will be read back.
+ * We'll write pixel data to buffer pointed to by "pixels" but we'll
+ * skip "skipRows" rows and skip "skipPixels" pixels/row.
+ */
+#if CHAN_BITS == 8
+ if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
+#elif CHAN_BITS == 16
+ if (format == GL_RGBA && type == GL_UNSIGNED_SHORT) {
+#else
+ if (0) {
+#endif
+ GLchan *dest = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels) * 4;
+ GLint row;
+
+ if (packing->Invert) {
+ /* start at top and go down */
+ dest += (readHeight - 1) * rowLength * 4;
+ rowLength = -rowLength;
+ }
+
+ ASSERT(rb->GetRow);
+ for (row=0; row<readHeight; row++) {
+ rb->GetRow(ctx, rb, readWidth, srcX, srcY, dest);
+ dest += rowLength * 4;
+ srcY++;
+ }
+ return GL_TRUE;
+ }
+ else {
+ /* can't do this format/type combination */
+ return GL_FALSE;
+ }
+ }
+}
+
+
+
+/*
+ * 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 )
+{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ GLint readWidth;
+
+ if (!rb) {
+ /* No readbuffer is OK with GL_EXT_framebuffer_object */
+ return;
+ }
+
+ /* do error checking on pixel type, format was already checked by caller */
+ switch (type) {
+ case GL_UNSIGNED_BYTE:
+ case GL_BYTE:
+ case GL_UNSIGNED_SHORT:
+ case GL_SHORT:
+ case GL_UNSIGNED_INT:
+ case GL_INT:
+ case GL_FLOAT:
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ /* valid pixel type */
+ break;
+ case GL_HALF_FLOAT_ARB:
+ if (!ctx->Extensions.ARB_half_float_pixel) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" );
+ return;
+ }
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" );
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
+ format == GL_INTENSITY) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(format or type)");
+ return;
+ }
+
+ _swrast_use_read_buffer(ctx);
+
+ /* Try optimized path first */
+ if (read_fast_rgba_pixels( ctx, x, y, width, height,
+ format, type, pixels, packing )) {
+
+ _swrast_use_draw_buffer(ctx);
+ return; /* done! */
+ }
+
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
+
+ if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
+ const GLuint transferOps = ctx->_ImageTransferState;
+ GLfloat *dest, *src, *tmpImage, *convImage;
+ GLint row;
+
+ tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!tmpImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ return;
+ }
+ convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!convImage) {
+ _mesa_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++) {
+ GLchan rgba[MAX_WIDTH][4];
+ if (ctx->Visual.rgbMode) {
+ _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
+ }
+ else {
+ GLuint index[MAX_WIDTH];
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y, index);
+ if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) {
+ _mesa_map_ci(ctx, readWidth, index);
+ }
+ _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba);
+ }
+ _mesa_pack_rgba_span_chan(ctx, readWidth, (const GLchan (*)[4]) rgba,
+ GL_RGBA, GL_FLOAT, dest, &ctx->DefaultPacking,
+ transferOps & IMAGE_PRE_CONVOLUTION_BITS);
+ dest += width * 4;
+ }
+
+ /* do convolution */
+ if (ctx->Pixel.Convolution2DEnabled) {
+ _mesa_convolve_2d_image(ctx, &readWidth, &height, tmpImage, convImage);
+ }
+ else {
+ ASSERT(ctx->Pixel.Separable2DEnabled);
+ _mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage);
+ }
+ _mesa_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, readWidth, height,
+ format, type, row, 0);
+ _mesa_pack_rgba_span_float(ctx, readWidth,
+ (const GLfloat (*)[4]) src,
+ format, type, dest, packing,
+ transferOps & IMAGE_POST_CONVOLUTION_BITS);
+ src += readWidth * 4;
+ }
+ }
+ else {
+ /* no convolution */
+ GLint row;
+ for (row = 0; row < height; row++, y++) {
+ GLchan rgba[MAX_WIDTH][4];
+ GLvoid *dst;
+ if (ctx->Visual.rgbMode) {
+ _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
+ }
+ else {
+ GLuint index[MAX_WIDTH];
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y, index);
+ if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
+ _mesa_map_ci(ctx, readWidth, index);
+ }
+ _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba);
+ }
+ dst = _mesa_image_address2d(packing, pixels, width, height,
+ format, type, row, 0);
+ if (ctx->Visual.redBits < CHAN_BITS ||
+ ctx->Visual.greenBits < CHAN_BITS ||
+ ctx->Visual.blueBits < CHAN_BITS) {
+ /* Requantize the color values into floating point and go from
+ * there. This fixes conformance failures with 16-bit color
+ * buffers, for example.
+ */
+ DEFMARRAY(GLfloat, rgbaf, MAX_WIDTH, 4); /* mac 32k limitation */
+ CHECKARRAY(rgbaf, return); /* mac 32k limitation */
+ _mesa_chan_to_float_span(ctx, readWidth,
+ (CONST GLchan (*)[4]) rgba, rgbaf);
+ _mesa_pack_rgba_span_float(ctx, readWidth,
+ (CONST GLfloat (*)[4]) rgbaf,
+ format, type, dst, packing,
+ ctx->_ImageTransferState);
+ UNDEFARRAY(rgbaf); /* mac 32k limitation */
+ }
+ else {
+ /* GLubytes are fine */
+ _mesa_pack_rgba_span_chan(ctx, readWidth, (CONST GLchan (*)[4]) rgba,
+ format, type, dst, packing,
+ ctx->_ImageTransferState);
+ }
+ }
+ }
+
+ _swrast_use_draw_buffer(ctx);
+}
+
+
+/**
+ * Software fallback routine for ctx->Driver.ReadPixels().
+ * We wind up using the swrast->ReadSpan() routines to do the job.
+ */
+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;
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ /* Do all needed clipping here, so that we can forget about it later */
+ clippedPacking = *packing;
+ if (clippedPacking.RowLength == 0) {
+ clippedPacking.RowLength = width;
+ }
+ if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height,
+ &clippedPacking.SkipPixels,
+ &clippedPacking.SkipRows)) {
+ /* The ReadPixels region is totally outside the window bounds */
+ return;
+ }
+
+ if (clippedPacking.BufferObj->Name) {
+ /* pack into PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, &clippedPacking, width, height, 1,
+ format, type, pixels)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glReadPixels(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB,
+ clippedPacking.BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
+ return;
+ }
+ pixels = ADD_POINTERS(buf, pixels);
+ }
+
+ RENDER_START(swrast, ctx);
+
+ switch (format) {
+ case GL_COLOR_INDEX:
+ read_index_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ 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;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(format)" );
+ /* don't return yet, clean-up */
+ }
+
+ RENDER_FINISH(swrast, ctx);
+
+ if (clippedPacking.BufferObj->Name) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ clippedPacking.BufferObj);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_span.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_span.c
new file mode 100644
index 000000000..47fa02bf1
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_span.c
@@ -0,0 +1,1511 @@
+/*
+ * 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.
+ */
+
+
+/**
+ * \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 "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "macros.h"
+#include "imports.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_nvfragprog.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_texture.h"
+
+
+/**
+ * Init span's Z interpolation values to the RasterPos Z.
+ * Used during setup for glDraw/CopyPixels.
+ */
+void
+_swrast_span_default_z( GLcontext *ctx, struct sw_span *span )
+{
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+ if (ctx->Visual.depthBits <= 16)
+ span->z = FloatToFixed(ctx->Current.RasterPos[2] * depthMax + 0.5F);
+ else
+ span->z = (GLint) (ctx->Current.RasterPos[2] * depthMax + 0.5F);
+ span->zStep = 0;
+ span->interpMask |= SPAN_Z;
+}
+
+
+/**
+ * Init span's fog interpolation values to the RasterPos fog.
+ * Used during setup for glDraw/CopyPixels.
+ */
+void
+_swrast_span_default_fog( GLcontext *ctx, struct sw_span *span )
+{
+ span->fog = _swrast_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
+ span->fogStep = span->dfogdx = span->dfogdy = 0.0F;
+ span->interpMask |= SPAN_FOG;
+}
+
+
+/**
+ * Init span's rgba or index interpolation values to the RasterPos color.
+ * Used during setup for glDraw/CopyPixels.
+ */
+void
+_swrast_span_default_color( GLcontext *ctx, struct sw_span *span )
+{
+ if (ctx->Visual.rgbMode) {
+ GLchan r, g, b, a;
+ 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;
+ }
+ else {
+ span->index = FloatToFixed(ctx->Current.RasterIndex);
+ span->indexStep = 0;
+ span->interpMask |= SPAN_INDEX;
+ }
+}
+
+
+/**
+ * Init span's texcoord interpolation values to the RasterPos texcoords.
+ * Used during setup for glDraw/CopyPixels.
+ */
+void
+_swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *span )
+{
+ GLuint i;
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+ const GLfloat *tc = ctx->Current.RasterTexCoords[i];
+ if (ctx->FragmentProgram._Active || ctx->ATIFragmentShader._Enabled) {
+ COPY_4V(span->tex[i], tc);
+ }
+ else if (tc[3] > 0.0F) {
+ /* use (s/q, t/q, r/q, 1) */
+ span->tex[i][0] = tc[0] / tc[3];
+ span->tex[i][1] = tc[1] / tc[3];
+ span->tex[i][2] = tc[2] / tc[3];
+ span->tex[i][3] = 1.0;
+ }
+ else {
+ ASSIGN_4V(span->tex[i], 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+ ASSIGN_4V(span->texStepX[i], 0.0F, 0.0F, 0.0F, 0.0F);
+ ASSIGN_4V(span->texStepY[i], 0.0F, 0.0F, 0.0F, 0.0F);
+ }
+ span->interpMask |= SPAN_TEXTURE;
+}
+
+
+/* Fill in the span.color.rgba array from the interpolation values */
+static void
+interpolate_colors(GLcontext *ctx, struct sw_span *span)
+{
+ const GLuint n = span->end;
+ GLchan (*rgba)[4] = span->array->rgba;
+ GLuint i;
+ (void) ctx;
+
+ ASSERT((span->interpMask & SPAN_RGBA) &&
+ !(span->arrayMask & SPAN_RGBA));
+
+ if (span->interpMask & SPAN_FLAT) {
+ /* constant color */
+ GLchan color[4];
+ color[RCOMP] = FixedToChan(span->red);
+ color[GCOMP] = FixedToChan(span->green);
+ color[BCOMP] = FixedToChan(span->blue);
+ color[ACOMP] = FixedToChan(span->alpha);
+ for (i = 0; i < n; i++) {
+ COPY_CHAN4(span->array->rgba[i], color);
+ }
+ }
+ else {
+ /* interpolate */
+#if CHAN_TYPE == GL_FLOAT
+ GLfloat r = span->red;
+ GLfloat g = span->green;
+ GLfloat b = span->blue;
+ GLfloat a = span->alpha;
+ const GLfloat dr = span->redStep;
+ const GLfloat dg = span->greenStep;
+ const GLfloat db = span->blueStep;
+ const GLfloat da = span->alphaStep;
+#else
+ GLfixed r = span->red;
+ GLfixed g = span->green;
+ GLfixed b = span->blue;
+ GLfixed a = span->alpha;
+ const GLint dr = span->redStep;
+ const GLint dg = span->greenStep;
+ const GLint db = span->blueStep;
+ const GLint da = span->alphaStep;
+#endif
+ 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;
+ }
+ }
+ span->arrayMask |= SPAN_RGBA;
+}
+
+
+/* Fill in the span.color.index array from the interpolation values */
+static void
+interpolate_indexes(GLcontext *ctx, struct sw_span *span)
+{
+ GLfixed index = span->index;
+ const GLint indexStep = span->indexStep;
+ const GLuint n = span->end;
+ GLuint *indexes = span->array->index;
+ GLuint i;
+ (void) ctx;
+ ASSERT((span->interpMask & SPAN_INDEX) &&
+ !(span->arrayMask & SPAN_INDEX));
+
+ if ((span->interpMask & SPAN_FLAT) || (indexStep == 0)) {
+ /* constant color */
+ index = FixedToInt(index);
+ for (i = 0; i < n; i++) {
+ indexes[i] = index;
+ }
+ }
+ else {
+ /* interpolate */
+ for (i = 0; i < n; i++) {
+ indexes[i] = FixedToInt(index);
+ index += indexStep;
+ }
+ }
+ span->arrayMask |= SPAN_INDEX;
+ span->interpMask &= ~SPAN_INDEX;
+}
+
+
+/* Fill in the span.->array->spec array from the interpolation values */
+static void
+interpolate_specular(GLcontext *ctx, struct sw_span *span)
+{
+ (void) ctx;
+ if (span->interpMask & SPAN_FLAT) {
+ /* constant color */
+ const GLchan r = FixedToChan(span->specRed);
+ const GLchan g = FixedToChan(span->specGreen);
+ const GLchan b = FixedToChan(span->specBlue);
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ span->array->spec[i][RCOMP] = r;
+ span->array->spec[i][GCOMP] = g;
+ span->array->spec[i][BCOMP] = b;
+ }
+ }
+ else {
+ /* interpolate */
+#if CHAN_TYPE == GL_FLOAT
+ GLfloat r = span->specRed;
+ GLfloat g = span->specGreen;
+ GLfloat b = span->specBlue;
+#else
+ GLfixed r = span->specRed;
+ GLfixed g = span->specGreen;
+ GLfixed b = span->specBlue;
+#endif
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ span->array->spec[i][RCOMP] = FixedToChan(r);
+ span->array->spec[i][GCOMP] = FixedToChan(g);
+ span->array->spec[i][BCOMP] = FixedToChan(b);
+ r += span->specRedStep;
+ g += span->specGreenStep;
+ b += span->specBlueStep;
+ }
+ }
+ span->arrayMask |= SPAN_SPEC;
+}
+
+
+/* Fill in the span.array.fog values from the interpolation values */
+static void
+interpolate_fog(const GLcontext *ctx, struct sw_span *span)
+{
+ GLfloat *fog = span->array->fog;
+ const GLfloat fogStep = span->fogStep;
+ GLfloat fogCoord = span->fog;
+ const GLuint haveW = (span->interpMask & SPAN_W);
+ const GLfloat wStep = haveW ? span->dwdx : 0.0F;
+ GLfloat w = haveW ? span->w : 1.0F;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ fog[i] = fogCoord / w;
+ fogCoord += fogStep;
+ w += wStep;
+ }
+ span->arrayMask |= SPAN_FOG;
+}
+
+
+/* Fill in the span.zArray array from the interpolation values */
+void
+_swrast_span_interpolate_z( const GLcontext *ctx, struct sw_span *span )
+{
+ const GLuint n = span->end;
+ GLuint i;
+
+ ASSERT((span->interpMask & SPAN_Z) &&
+ !(span->arrayMask & SPAN_Z));
+
+ if (ctx->Visual.depthBits <= 16) {
+ GLfixed zval = span->z;
+ GLdepth *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 */
+ GLfixed zval = span->z;
+ GLdepth *z = span->array->z;
+ for (i = 0; i < n; i++) {
+ z[i] = zval;
+ zval += span->zStep;
+ }
+ }
+ span->interpMask &= ~SPAN_Z;
+ span->arrayMask |= SPAN_Z;
+}
+
+
+/*
+ * This the ideal solution, as given in the OpenGL spec.
+ */
+#if 0
+static GLfloat
+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;
+}
+#endif
+
+
+/*
+ * This is a faster approximation
+ */
+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;
+}
+
+
+/**
+ * Fill in the span.texcoords array from the interpolation values.
+ * 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).
+ * If we're using a fragment program, we never do the division
+ * for texcoord projection. That's done by the TXP instruction
+ * or user-written code.
+ */
+static void
+interpolate_texcoords(GLcontext *ctx, struct sw_span *span)
+{
+ ASSERT(span->interpMask & SPAN_TEXTURE);
+ ASSERT(!(span->arrayMask & SPAN_TEXTURE));
+
+ if (ctx->Texture._EnabledCoordUnits > 1) {
+ /* multitexture */
+ GLuint u;
+ span->arrayMask |= SPAN_TEXTURE;
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
+ const struct gl_texture_object *obj =ctx->Texture.Unit[u]._Current;
+ GLfloat texW, texH;
+ GLboolean needLambda;
+ if (obj) {
+ const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel];
+ needLambda = (obj->MinFilter != obj->MagFilter)
+ || ctx->FragmentProgram._Active;
+ texW = img->WidthScale;
+ texH = img->HeightScale;
+ }
+ else {
+ /* using a fragment program */
+ texW = 1.0;
+ texH = 1.0;
+ needLambda = GL_FALSE;
+ }
+ if (needLambda) {
+ GLfloat (*texcoord)[4] = span->array->texcoords[u];
+ GLfloat *lambda = span->array->lambda[u];
+ const GLfloat dsdx = span->texStepX[u][0];
+ const GLfloat dsdy = span->texStepY[u][0];
+ const GLfloat dtdx = span->texStepX[u][1];
+ const GLfloat dtdy = span->texStepY[u][1];
+ const GLfloat drdx = span->texStepX[u][2];
+ const GLfloat dqdx = span->texStepX[u][3];
+ const GLfloat dqdy = span->texStepY[u][3];
+ GLfloat s = span->tex[u][0];
+ GLfloat t = span->tex[u][1];
+ GLfloat r = span->tex[u][2];
+ GLfloat q = span->tex[u][3];
+ GLuint i;
+ if (ctx->FragmentProgram._Active) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->dwdx;
+ GLfloat w = span->w;
+ 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 {
+ GLfloat (*texcoord)[4] = span->array->texcoords[u];
+ GLfloat *lambda = span->array->lambda[u];
+ const GLfloat dsdx = span->texStepX[u][0];
+ const GLfloat dtdx = span->texStepX[u][1];
+ const GLfloat drdx = span->texStepX[u][2];
+ const GLfloat dqdx = span->texStepX[u][3];
+ GLfloat s = span->tex[u][0];
+ GLfloat t = span->tex[u][1];
+ GLfloat r = span->tex[u][2];
+ GLfloat q = span->tex[u][3];
+ GLuint i;
+ if (ctx->FragmentProgram._Active) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->dwdx;
+ GLfloat w = span->w;
+ 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 */
+ }
+ else {
+ /* single texture */
+ const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current;
+ GLfloat texW, texH;
+ GLboolean needLambda;
+ if (obj) {
+ const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel];
+ needLambda = (obj->MinFilter != obj->MagFilter)
+ || ctx->FragmentProgram._Active;
+ texW = (GLfloat) img->WidthScale;
+ texH = (GLfloat) img->HeightScale;
+ }
+ else {
+ needLambda = GL_FALSE;
+ texW = texH = 1.0;
+ }
+ span->arrayMask |= SPAN_TEXTURE;
+ if (needLambda) {
+ /* just texture unit 0, with lambda */
+ GLfloat (*texcoord)[4] = span->array->texcoords[0];
+ GLfloat *lambda = span->array->lambda[0];
+ const GLfloat dsdx = span->texStepX[0][0];
+ const GLfloat dsdy = span->texStepY[0][0];
+ const GLfloat dtdx = span->texStepX[0][1];
+ const GLfloat dtdy = span->texStepY[0][1];
+ const GLfloat drdx = span->texStepX[0][2];
+ const GLfloat dqdx = span->texStepX[0][3];
+ const GLfloat dqdy = span->texStepY[0][3];
+ GLfloat s = span->tex[0][0];
+ GLfloat t = span->tex[0][1];
+ GLfloat r = span->tex[0][2];
+ GLfloat q = span->tex[0][3];
+ GLuint i;
+ if (ctx->FragmentProgram._Active) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->dwdx;
+ GLfloat w = span->w;
+ 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 {
+ /* tex.c */
+ for (i = 0; i < span->end; i++) {
+ const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q);
+ lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy,
+ dqdx, dqdy, texW, texH,
+ s, t, q, invQ);
+ texcoord[i][0] = s * invQ;
+ texcoord[i][1] = t * invQ;
+ texcoord[i][2] = r * invQ;
+ texcoord[i][3] = q;
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ }
+ }
+ span->arrayMask |= SPAN_LAMBDA;
+ }
+ else {
+ /* just texture 0, without lambda */
+ GLfloat (*texcoord)[4] = span->array->texcoords[0];
+ const GLfloat dsdx = span->texStepX[0][0];
+ const GLfloat dtdx = span->texStepX[0][1];
+ const GLfloat drdx = span->texStepX[0][2];
+ const GLfloat dqdx = span->texStepX[0][3];
+ GLfloat s = span->tex[0][0];
+ GLfloat t = span->tex[0][1];
+ GLfloat r = span->tex[0][2];
+ GLfloat q = span->tex[0][3];
+ GLuint i;
+ if (ctx->FragmentProgram._Active) {
+ /* do perspective correction but don't divide s, t, r by q */
+ const GLfloat dwdx = span->dwdx;
+ GLfloat w = span->w;
+ 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;
+ 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;
+ 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;
+ s += dsdx;
+ t += dtdx;
+ r += drdx;
+ q += dqdx;
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Apply the current polygon stipple pattern to a span of pixels.
+ */
+static void
+stipple_polygon_span( GLcontext *ctx, struct sw_span *span )
+{
+ const GLuint highbit = 0x80000000;
+ const GLuint stipple = ctx->PolygonStipple[span->y % 32];
+ GLubyte *mask = span->array->mask;
+ GLuint i, m;
+
+ ASSERT(ctx->Polygon.StippleFlag);
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+
+ 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 GLuint
+clip_span( GLcontext *ctx, struct sw_span *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;
+
+ 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;
+ const 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 the left */
+ if (x < xmin) {
+ ASSERT(x + n > xmin);
+ span->writeAll = GL_FALSE;
+ _mesa_bzero(span->array->mask, (xmin - x) * sizeof(GLubyte));
+ }
+
+ /* Clip to right */
+ if (x + n > xmax) {
+ ASSERT(x < xmax);
+ span->end = xmax - x;
+ }
+
+ return GL_TRUE; /* some pixels visible */
+ }
+}
+
+
+/**
+ * Apply all the per-fragment opertions to a span of color index fragments
+ * and write them to the enabled color drawbuffers.
+ * The 'span' parameter can be considered to be const. Note that
+ * span->interpMask and span->arrayMask may be changed but will be restored
+ * to their original values before returning.
+ */
+void
+_swrast_write_index_span( GLcontext *ctx, struct sw_span *span)
+{
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ const GLuint output = 0;
+ const GLuint origInterpMask = span->interpMask;
+ const GLuint origArrayMask = span->arrayMask;
+ GLuint buf;
+
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT(span->primitive == GL_POINT || span->primitive == GL_LINE ||
+ span->primitive == GL_POLYGON || span->primitive == GL_BITMAP);
+ ASSERT((span->interpMask | span->arrayMask) & SPAN_INDEX);
+ ASSERT((span->interpMask & span->arrayMask) == 0);
+
+ if (span->arrayMask & SPAN_MASK) {
+ /* mask was initialized by caller, probably glBitmap */
+ span->writeAll = GL_FALSE;
+ }
+ else {
+ _mesa_memset(span->array->mask, 1, span->end);
+ span->writeAll = GL_TRUE;
+ }
+
+ /* Clipping */
+ if ((swrast->_RasterMask & CLIP_BIT) || (span->primitive != GL_POLYGON)) {
+ if (!clip_span(ctx, span)) {
+ return;
+ }
+ }
+
+ /* Depth bounds test */
+ if (ctx->Depth.BoundsTest && ctx->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) {
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ assert(span->array->x[i] >= ctx->DrawBuffer->_Xmin);
+ assert(span->array->x[i] < ctx->DrawBuffer->_Xmax);
+ assert(span->array->y[i] >= ctx->DrawBuffer->_Ymin);
+ assert(span->array->y[i] < ctx->DrawBuffer->_Ymax);
+ }
+ }
+ }
+#endif
+
+ /* Polygon Stippling */
+ if (ctx->Polygon.StippleFlag && span->primitive == GL_POLYGON) {
+ stipple_polygon_span(ctx, span);
+ }
+
+ /* Stencil and Z testing */
+ if (ctx->Depth.Test || ctx->Stencil.Enabled) {
+ if (span->interpMask & SPAN_Z)
+ _swrast_span_interpolate_z(ctx, span);
+
+ if (ctx->Stencil.Enabled) {
+ if (!_swrast_stencil_and_ztest_span(ctx, span)) {
+ span->arrayMask = origArrayMask;
+ return;
+ }
+ }
+ else {
+ ASSERT(ctx->Depth.Test);
+ if (!_swrast_depth_test_span(ctx, span)) {
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+ return;
+ }
+ }
+ }
+
+ /* if we get here, something passed the depth test */
+ if (ctx->Depth.OcclusionTest) {
+ ctx->OcclusionResult = GL_TRUE;
+ }
+
+#if FEATURE_ARB_occlusion_query
+ if (ctx->Occlusion.Active) {
+ /* update count of 'passed' fragments */
+ GLuint i;
+ for (i = 0; i < span->end; i++)
+ ctx->Occlusion.PassedCounter += span->array->mask[i];
+ }
+#endif
+
+ /* we have to wait until after occlusion to do this test */
+ if (ctx->Color.DrawBuffer == GL_NONE || ctx->Color.IndexMask == 0) {
+ /* write no pixels */
+ span->arrayMask = origArrayMask;
+ return;
+ }
+
+ /* Interpolate the color indexes if needed */
+ if (swrast->_FogEnabled ||
+ ctx->Color.IndexLogicOpEnabled ||
+ ctx->Color.IndexMask != 0xffffffff ||
+ (span->arrayMask & SPAN_COVERAGE)) {
+ if (span->interpMask & SPAN_INDEX) {
+ interpolate_indexes(ctx, span);
+ }
+ }
+
+ /* Fog */
+ if (swrast->_FogEnabled) {
+ _swrast_fog_ci_span(ctx, span);
+ }
+
+ /* Antialias coverage application */
+ if (span->arrayMask & SPAN_COVERAGE) {
+ const GLfloat *coverage = span->array->coverage;
+ GLuint *index = span->array->index;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ ASSERT(coverage[i] < 16);
+ index[i] = (index[i] & ~0xf) | ((GLuint) coverage[i]);
+ }
+ }
+
+ /* Loop over drawing buffers */
+ for (buf = 0; buf < fb->_NumColorDrawBuffers[output]; buf++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[output][buf];
+ GLuint indexTemp[MAX_WIDTH], *index32;
+
+ ASSERT(rb->_BaseFormat == GL_COLOR_INDEX);
+
+ if (ctx->Color.IndexLogicOpEnabled ||
+ ctx->Color.IndexMask != 0xffffffff) {
+ /* make copy of incoming indexes */
+ MEMCPY(indexTemp, span->array->index, span->end * sizeof(GLuint));
+
+ if (ctx->Color.IndexLogicOpEnabled) {
+ _swrast_logicop_ci_span(ctx, rb, span, indexTemp);
+ }
+
+ if (ctx->Color.IndexMask != 0xffffffff) {
+ _swrast_mask_ci_span(ctx, rb, span, indexTemp);
+ }
+ index32 = indexTemp;
+ }
+ else {
+ index32 = span->array->index;
+ }
+
+ if ((span->interpMask & SPAN_INDEX) && span->indexStep == 0) {
+ /* all fragments have same color index */
+ GLubyte index8;
+ GLushort index16;
+ GLuint index32;
+ void *value;
+
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ index8 = FixedToInt(span->index);
+ value = &index8;
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ index16 = FixedToInt(span->index);
+ value = &index16;
+ }
+ else {
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ index32 = FixedToInt(span->index);
+ value = &index32;
+ }
+
+ if (span->arrayMask & SPAN_XY) {
+ rb->PutMonoValues(ctx, rb, span->end, span->array->x,
+ span->array->y, value, span->array->mask);
+ }
+ else {
+ rb->PutMonoRow(ctx, rb, span->end, span->x, span->y,
+ value, span->array->mask);
+ }
+ }
+ else {
+ /* each fragment is a different color */
+ GLubyte index8[MAX_WIDTH];
+ GLushort index16[MAX_WIDTH];
+ void *values;
+
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ GLuint k;
+ for (k = 0; k < span->end; k++) {
+ index8[k] = (GLubyte) index32[k];
+ }
+ values = index8;
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLuint k;
+ for (k = 0; k < span->end; k++) {
+ index16[k] = (GLushort) index32[k];
+ }
+ values = index16;
+ }
+ else {
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ values = index32;
+ }
+
+ if (span->arrayMask & SPAN_XY) {
+ rb->PutValues(ctx, rb, span->end, span->array->x, span->array->y,
+ values, span->array->mask);
+ }
+ else {
+ rb->PutRow(ctx, rb, span->end, span->x, span->y,
+ values, span->array->mask);
+ }
+ }
+ }
+
+#if OLD_RENDERBUFFER
+ /* restore default dest buffer */
+ _swrast_use_draw_buffer(ctx);
+#endif
+
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+}
+
+
+/**
+ * Add specular color to base color. This is used only when
+ * GL_LIGHT_MODEL_COLOR_CONTROL = GL_SEPARATE_SPECULAR_COLOR.
+ */
+static void
+add_colors(GLuint n, GLchan rgba[][4], GLchan specular[][4] )
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ /* no clamping */
+ rgba[i][RCOMP] += specular[i][RCOMP];
+ rgba[i][GCOMP] += specular[i][GCOMP];
+ rgba[i][BCOMP] += specular[i][BCOMP];
+#else
+ GLint r = rgba[i][RCOMP] + specular[i][RCOMP];
+ GLint g = rgba[i][GCOMP] + specular[i][GCOMP];
+ GLint b = rgba[i][BCOMP] + specular[i][BCOMP];
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+}
+
+
+/**
+ * XXX merge this code into the _swrast_write_rgba_span() routine!
+ *
+ * Draw to more than one RGBA color buffer (or none).
+ * All fragment operations, up to (but not) blending/logicop should
+ * have been done first.
+ */
+static void
+multi_write_rgba_span( GLcontext *ctx, struct sw_span *span )
+{
+#if OLD_RENDERBUFFER
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+#endif
+ const GLuint colorMask = *((GLuint *) ctx->Color.ColorMask);
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ const GLuint output = 0;
+ GLuint i;
+
+ ASSERT(span->end < MAX_WIDTH);
+ ASSERT(colorMask != 0x0);
+
+ for (i = 0; i < fb->_NumColorDrawBuffers[output]; i++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[output][i];
+ GLchan rgbaTmp[MAX_WIDTH][4];
+
+#if OLD_RENDERBUFFER
+ /* obsolete code */
+ GLuint bufferBit = fb->_ColorDrawBit[output][i];
+ /* Set the current read/draw buffer */
+ swrast->CurrentBufferBit = bufferBit;
+ if (swrast->Driver.SetBuffer)
+ (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, bufferBit);
+#endif
+
+ /* make copy of incoming colors */
+ MEMCPY( rgbaTmp, span->array->rgba, 4 * span->end * sizeof(GLchan) );
+
+ if (ctx->Color._LogicOpEnabled) {
+ _swrast_logicop_rgba_span(ctx, rb, span, rgbaTmp);
+ }
+ else if (ctx->Color.BlendEnabled) {
+ _swrast_blend_span(ctx, rb, span, rgbaTmp);
+ }
+
+ if (colorMask != 0xffffffff) {
+ _swrast_mask_rgba_span(ctx, rb, span, rgbaTmp);
+ }
+
+ if (span->arrayMask & SPAN_XY) {
+ /* array of pixel coords */
+ ASSERT(rb->PutValues);
+ rb->PutValues(ctx, rb, span->end, span->array->x,
+ span->array->y, rgbaTmp, span->array->mask);
+ }
+ else {
+ /* horizontal run of pixels */
+ ASSERT(rb->PutRow);
+ rb->PutRow(ctx, rb, span->end, span->x, span->y, rgbaTmp,
+ span->array->mask);
+ }
+ }
+
+#if OLD_RENDERBUFFER
+ /* restore default dest buffer */
+ _swrast_use_draw_buffer(ctx);
+#endif
+}
+
+
+/**
+ * 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, struct sw_span *span)
+{
+ const GLuint colorMask = *((GLuint *) ctx->Color.ColorMask);
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLuint origInterpMask = span->interpMask;
+ const GLuint origArrayMask = span->arrayMask;
+ const GLboolean deferredTexture = !(ctx->Color.AlphaEnabled ||
+ ctx->FragmentProgram._Active ||
+ ctx->ATIFragmentShader._Enabled);
+
+ ASSERT(span->primitive == GL_POINT || span->primitive == GL_LINE ||
+ span->primitive == GL_POLYGON || span->primitive == GL_BITMAP);
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT((span->interpMask & span->arrayMask) == 0);
+
+ /*
+ printf("%s() interp 0x%x array 0x%x\n", __FUNCTION__,
+ span->interpMask, span->arrayMask);
+ */
+
+ if (span->arrayMask & SPAN_MASK) {
+ /* mask was initialized by caller, probably glBitmap */
+ span->writeAll = GL_FALSE;
+ }
+ else {
+ _mesa_memset(span->array->mask, 1, span->end);
+ span->writeAll = GL_TRUE;
+ }
+
+ /* Clip to window/scissor box */
+ if ((swrast->_RasterMask & CLIP_BIT) || (span->primitive != GL_POLYGON)) {
+ if (!clip_span(ctx, span)) {
+ return;
+ }
+ }
+
+#ifdef DEBUG
+ /* Make sure all fragments are within window bounds */
+ if (span->arrayMask & SPAN_XY) {
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ if (span->array->mask[i]) {
+ assert(span->array->x[i] >= ctx->DrawBuffer->_Xmin);
+ assert(span->array->x[i] < ctx->DrawBuffer->_Xmax);
+ assert(span->array->y[i] >= ctx->DrawBuffer->_Ymin);
+ assert(span->array->y[i] < ctx->DrawBuffer->_Ymax);
+ }
+ }
+ }
+#endif
+
+ /* Polygon Stippling */
+ if (ctx->Polygon.StippleFlag && span->primitive == GL_POLYGON) {
+ stipple_polygon_span(ctx, span);
+ }
+
+ /* Interpolate texcoords? */
+ if (ctx->Texture._EnabledCoordUnits
+ && (span->interpMask & SPAN_TEXTURE)
+ && (span->arrayMask & SPAN_TEXTURE) == 0) {
+ interpolate_texcoords(ctx, span);
+ }
+
+ /* This is the normal place to compute the resulting fragment color/Z.
+ * As an optimization, we try to defer this until after Z/stencil
+ * testing in order to try to avoid computing colors that we won't
+ * actually need.
+ */
+ if (!deferredTexture) {
+ /* Now we need the rgba array, fill it in if needed */
+ if ((span->interpMask & SPAN_RGBA) && (span->arrayMask & SPAN_RGBA) == 0)
+ interpolate_colors(ctx, span);
+
+ if (span->interpMask & SPAN_SPEC)
+ interpolate_specular(ctx, span);
+
+ if (span->interpMask & SPAN_FOG)
+ interpolate_fog(ctx, span);
+
+ /* Compute fragment colors with fragment program or texture lookups */
+ if (ctx->FragmentProgram._Active) {
+ /* frag prog may need Z values */
+ if (span->interpMask & SPAN_Z)
+ _swrast_span_interpolate_z(ctx, span);
+ _swrast_exec_fragment_program( ctx, span );
+ }
+ else if (ctx->ATIFragmentShader._Enabled)
+ _swrast_exec_fragment_shader( ctx, span );
+ else if (ctx->Texture._EnabledUnits && (span->arrayMask & SPAN_TEXTURE))
+ _swrast_texture_span( ctx, span );
+
+ /* Do the alpha test */
+ if (!_swrast_alpha_test(ctx, span)) {
+ span->arrayMask = origArrayMask;
+ return;
+ }
+ }
+
+ /* Stencil and Z testing */
+ if (ctx->Stencil.Enabled || ctx->Depth.Test) {
+ if (span->interpMask & SPAN_Z)
+ _swrast_span_interpolate_z(ctx, span);
+
+ if (ctx->Stencil.Enabled && ctx->DrawBuffer->Visual.stencilBits > 0) {
+ /* Combined Z/stencil tests */
+ if (!_swrast_stencil_and_ztest_span(ctx, span)) {
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+ return;
+ }
+ }
+ else if (ctx->DrawBuffer->Visual.depthBits > 0) {
+ /* Just regular depth testing */
+ ASSERT(ctx->Depth.Test);
+ ASSERT(span->arrayMask & SPAN_Z);
+ if (!_swrast_depth_test_span(ctx, span)) {
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+ return;
+ }
+ }
+ }
+
+ /* if we get here, some fragments passed the depth test */
+ if (ctx->Depth.OcclusionTest) {
+ ctx->OcclusionResult = GL_TRUE;
+ }
+
+#if FEATURE_ARB_occlusion_query
+ if (ctx->Occlusion.Active) {
+ /* update count of 'passed' fragments */
+ GLuint i;
+ for (i = 0; i < span->end; i++)
+ ctx->Occlusion.PassedCounter += span->array->mask[i];
+ }
+#endif
+
+ /* We had to wait until now to check for glColorMask(0,0,0,0) because of
+ * the occlusion test.
+ */
+ if (colorMask == 0x0) {
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+ return;
+ }
+
+ /* 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 (deferredTexture) {
+ /* Now we need the rgba array, fill it in if needed */
+ if ((span->interpMask & SPAN_RGBA) && (span->arrayMask & SPAN_RGBA) == 0)
+ interpolate_colors(ctx, span);
+
+ if (span->interpMask & SPAN_SPEC)
+ interpolate_specular(ctx, span);
+
+ if (span->interpMask & SPAN_FOG)
+ interpolate_fog(ctx, span);
+
+ if (ctx->FragmentProgram._Active)
+ _swrast_exec_fragment_program( ctx, span );
+ else if (ctx->ATIFragmentShader._Enabled)
+ _swrast_exec_fragment_shader( ctx, span );
+ else if (ctx->Texture._EnabledUnits && (span->arrayMask & SPAN_TEXTURE))
+ _swrast_texture_span( ctx, span );
+ }
+
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ if (!ctx->FragmentProgram._Enabled) {
+ /* Add base and specular colors */
+ if (ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+ if (span->interpMask & SPAN_SPEC) {
+ interpolate_specular(ctx, span);
+ }
+ if (span->arrayMask & SPAN_SPEC) {
+ add_colors( span->end, span->array->rgba, span->array->spec );
+ }
+ else {
+ /* We probably added the base/specular colors during the
+ * vertex stage!
+ */
+ }
+ }
+ }
+
+ /* Fog */
+ if (swrast->_FogEnabled) {
+ _swrast_fog_rgba_span(ctx, span);
+ }
+
+ /* Antialias coverage application */
+ if (span->arrayMask & SPAN_COVERAGE) {
+ GLchan (*rgba)[4] = span->array->rgba;
+ GLfloat *coverage = span->array->coverage;
+ GLuint i;
+ for (i = 0; i < span->end; i++) {
+ rgba[i][ACOMP] = (GLchan) (rgba[i][ACOMP] * coverage[i]);
+ }
+ }
+
+ if (swrast->_RasterMask & MULTI_DRAW_BIT) {
+ /* need to do blend/logicop separately for each color buffer */
+ multi_write_rgba_span(ctx, span);
+ }
+ else {
+ /* normal: write to exactly one buffer */
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+
+ if (ctx->Color._LogicOpEnabled) {
+ _swrast_logicop_rgba_span(ctx, rb, span, span->array->rgba);
+ }
+ else if (ctx->Color.BlendEnabled) {
+ _swrast_blend_span(ctx, rb, span, span->array->rgba);
+ }
+
+ /* Color component masking */
+ if (colorMask != 0xffffffff) {
+ _swrast_mask_rgba_span(ctx, rb, span, span->array->rgba);
+ }
+
+ /* Finally, write the pixels to a color buffer */
+ if (span->arrayMask & SPAN_XY) {
+ /* array of pixel coords */
+ ASSERT(rb->PutValues);
+ ASSERT(rb->_BaseFormat == GL_RGB || rb->_BaseFormat == GL_RGBA);
+ /* XXX check datatype */
+ 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);
+ ASSERT(rb->_BaseFormat == GL_RGB || rb->_BaseFormat == GL_RGBA);
+ /* XXX check datatype */
+ rb->PutRow(ctx, rb, span->end, span->x, span->y, span->array->rgba,
+ span->writeAll ? NULL : span->array->mask);
+ }
+ }
+
+ span->interpMask = origInterpMask;
+ span->arrayMask = origArrayMask;
+}
+
+
+
+/**
+ * Read RGBA pixels from frame buffer. Clipping will be done to prevent
+ * reading ouside the buffer's boundaries.
+ */
+void
+_swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLchan rgba[][4] )
+{
+ 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? */
+ _mesa_bzero(rgba, 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);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ rb->GetRow(ctx, rb, length, x + skip, y, rgba + skip);
+ }
+}
+
+
+/**
+ * Read CI pixels from frame buffer. Clipping will be done to prevent
+ * reading ouside the buffer's boundaries.
+ */
+void
+_swrast_read_index_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLuint index[] )
+{
+ 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 */
+ _mesa_bzero(index, n * sizeof(GLuint));
+ }
+ 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->GetRow);
+ ASSERT(rb->_BaseFormat == GL_COLOR_INDEX);
+
+ if (rb->DataType == GL_UNSIGNED_BYTE) {
+ GLubyte index8[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, length, x + skip, y, index8);
+ for (i = 0; i < length; i++)
+ index[skip + i] = index8[i];
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort index16[MAX_WIDTH];
+ GLint i;
+ rb->GetRow(ctx, rb, length, x + skip, y, index16);
+ for (i = 0; i < length; i++)
+ index[skip + i] = index16[i];
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ rb->GetRow(ctx, rb, length, x + skip, y, index + skip);
+ }
+ }
+}
+
+
+/**
+ * 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 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] < rb->Width && y[i] < 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);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_span.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_span.h
new file mode 100644
index 000000000..1bba5aa53
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_span.h
@@ -0,0 +1,75 @@
+/*
+ * 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_SPAN_H
+#define S_SPAN_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern void
+_swrast_span_default_z( GLcontext *ctx, struct sw_span *span );
+
+extern void
+_swrast_span_interpolate_z( const GLcontext *ctx, struct sw_span *span );
+
+extern void
+_swrast_span_default_fog( GLcontext *ctx, struct sw_span *span );
+
+extern void
+_swrast_span_default_color( GLcontext *ctx, struct sw_span *span );
+
+extern void
+_swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *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_index_span( GLcontext *ctx, struct sw_span *span);
+
+
+extern void
+_swrast_write_rgba_span( GLcontext *ctx, struct sw_span *span);
+
+
+extern void
+_swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLchan rgba[][4] );
+
+extern void
+_swrast_read_index_span( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLuint indx[] );
+
+extern void
+_swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values, GLuint valueSize);
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_spantemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_spantemp.h
new file mode 100644
index 000000000..4ccf031cb
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_spantemp.h
@@ -0,0 +1,251 @@
+/*
+ * 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.
+ */
+
+
+/*
+ * 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(PREFIX) to generate the function name
+ * FORMAT must be either GL_RGBA, GL_RGBA8 or GL_COLOR_INDEX8_EXT
+ * 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 "macros.h"
+
+
+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
+#if FORMAT == GL_RGBA
+ GLchan (*dest)[4] = (GLchan (*)[4]) values;
+#elif FORMAT == GL_RGBA8
+ GLubyte (*dest)[4] = (GLubyte (*)[4]) values;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ GLubyte *dest = (GLubyte *) values;
+#else
+#error FORMAT must be set!!!!
+#endif
+ GLuint i;
+ INIT_PIXEL_PTR(pixel, x, y);
+ for (i = 0; i < count; i++) {
+ FETCH_PIXEL(dest[i], pixel);
+ INC_PIXEL_PTR(pixel);
+ }
+}
+
+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
+#if FORMAT == GL_RGBA
+ GLchan (*dest)[4] = (GLchan (*)[4]) values;
+#elif FORMAT == GL_RGBA8
+ GLubyte (*dest)[4] = (GLubyte (*)[4]) values;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ GLubyte *dest = (GLubyte *) values;
+#endif
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ INIT_PIXEL_PTR(pixel, x[i], y[i]);
+ FETCH_PIXEL(dest[i], pixel);
+ }
+}
+
+
+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
+#if FORMAT == GL_RGBA
+ const GLchan (*src)[4] = (const GLchan (*)[4]) values;
+#elif FORMAT == GL_RGBA8
+ const GLubyte (*src)[4] = (const GLubyte (*)[4]) values;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ const GLubyte (*src)[1] = (const GLubyte (*)[1]) values;
+#endif
+ 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);
+ }
+ }
+}
+
+#if (FORMAT == GL_RGBA) || (FORMAT == GL_RGBA8)
+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
+#if FORMAT == GL_RGBA
+ const GLchan (*src)[3] = (const GLchan (*)[3]) values;
+#elif FORMAT == GL_RGBA8
+ const GLubyte (*src)[3] = (const GLubyte (*)[3]) values;
+#else
+#error bad format
+#endif
+ 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);
+ }
+}
+#endif
+
+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
+#if FORMAT == GL_RGBA
+ const GLchan *src = (const GLchan *) value;
+#elif FORMAT == GL_RGBA8
+ const GLubyte *src = (const GLubyte *) value;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ const GLubyte *src = (const GLubyte *) value;
+#endif
+ 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);
+ }
+ }
+}
+
+
+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
+#if FORMAT == GL_RGBA
+ const GLchan (*src)[4] = (const GLchan (*)[4]) values;
+#elif FORMAT == GL_RGBA8
+ const GLubyte (*src)[4] = (const GLubyte (*)[4]) values;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ const GLubyte (*src)[1] = (const GLubyte (*)[1]) values;
+#endif
+ 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]);
+ }
+ }
+}
+
+
+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
+#if FORMAT == GL_RGBA
+ const GLchan *src = (const GLchan *) value;
+#elif FORMAT == GL_RGBA8
+ const GLubyte *src = (const GLubyte *) value;
+#elif FORMAT == GL_COLOR_INDEX8_EXT
+ const GLubyte *src = (const GLubyte *) value;
+#endif
+ 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);
+ }
+ }
+}
+
+
+#undef NAME
+#undef SPAN_VARS
+#undef INIT_PIXEL_PTR
+#undef INC_PIXEL_PTR
+#undef STORE_PIXEL
+#undef STORE_PIXEL_RGB
+#undef FETCH_PIXEL
+#undef FORMAT
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.c
new file mode 100644
index 000000000..98638b244
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.c
@@ -0,0 +1,1221 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4.1
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "imports.h"
+#include "fbobject.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);
+ 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 < STENCIL_MAX) {
+ 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 < STENCIL_MAX) {
+ 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;
+ GLstencil r, s;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
+
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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:
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ 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;
+}
+
+
+
+/**
+ * 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, struct sw_span *span, GLuint face)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ 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 = 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], oldmask[MAX_WIDTH];
+ GLuint i;
+
+ /* save the current mask bits */
+ _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte));
+
+ /* apply the depth test */
+ _swrast_depth_test_span(ctx, span);
+
+ /* Set the stencil pass/fail flags according to result of depth testing.
+ * if oldmask[i] == 0 then
+ * Don't touch the stencil value
+ * else if oldmask[i] and newmask[i] then
+ * Depth test passed
+ * else
+ * assert(oldmask[i] && !newmask[i])
+ * Depth test failed
+ * endif
+ */
+ for (i=0;i<n;i++) {
+ ASSERT(mask[i] == 0 || mask[i] == 1);
+ passmask[i] = oldmask[i] & mask[i];
+ failmask[i] = oldmask[i] & (mask[i] ^ 1);
+ }
+
+ /* 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->Attachment[BUFFER_STENCIL].Renderbuffer;
+ 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 < STENCIL_MAX) {
+ *sptr = (GLstencil) (*sptr + 1);
+ }
+ }
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLstencil *sptr = STENCIL_ADDRESS( x[i], y[i] );
+ if (*sptr < STENCIL_MAX) {
+ *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->Attachment[BUFFER_STENCIL].Renderbuffer;
+ 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, struct sw_span *span, GLuint face )
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ 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];
+ GLubyte origMask[MAX_WIDTH];
+
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ _swrast_get_values(ctx, rb, n, x, y, stencil, sizeof(GLubyte));
+
+ _mesa_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 {
+ _swrast_depth_test_span(ctx, span);
+
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ GLubyte failmask[MAX_WIDTH];
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(mask[i] == 0 || mask[i] == 1);
+ failmask[i] = origMask[i] & (mask[i] ^ 1);
+ }
+ apply_stencil_op(ctx, ctx->Stencil.ZFailFunc[face], face,
+ n, stencil, failmask);
+ }
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ GLubyte passmask[MAX_WIDTH];
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(mask[i] == 0 || mask[i] == 1);
+ passmask[i] = origMask[i] & mask[i];
+ }
+ 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 {
+ GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH];
+ GLuint i;
+
+ _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte));
+
+ _swrast_depth_test_span(ctx, span);
+
+ for (i=0;i<n;i++) {
+ ASSERT(mask[i] == 0 || mask[i] == 1);
+ passmask[i] = oldmask[i] & mask[i];
+ failmask[i] = oldmask[i] & (mask[i] ^ 1);
+ }
+
+ 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, struct sw_span *span)
+{
+ /* span->facing can only be non-zero if using two-sided stencil */
+ ASSERT(ctx->Stencil.TestTwoSide || span->facing == 0);
+ if (span->arrayMask & SPAN_XY)
+ return stencil_and_ztest_pixels(ctx, span, span->facing);
+ else
+ return stencil_and_ztest_span(ctx, span, span->facing);
+}
+
+
+#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 >= rb->Height || x + n <= 0 || x >= 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 > 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.
+ * 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->Attachment[BUFFER_STENCIL].Renderbuffer;
+ const GLuint stencilMax = (1 << fb->Visual.stencilBits) - 1;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+
+ if (y < 0 || y >= rb->Height || x + n <= 0 || x >= 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 > 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 GLstencil mask = ctx->Stencil.WriteMask[0];
+ const GLstencil invMask = ~mask;
+ const GLstencil clearVal = (ctx->Stencil.Clear & mask);
+ GLint x, y, width, height;
+
+ if (!rb || mask == 0)
+ return;
+
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ 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 (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
+ /* need to mask the clear */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte *stencil = 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 == rb->Width &&
+ rb->InternalFormat == GL_STENCIL_INDEX8_EXT) {
+ /* optimized case */
+ GLubyte *stencil = rb->GetPointer(ctx, rb, x, y);
+ GLuint len = width * height * sizeof(GLubyte);
+ _mesa_memset(stencil, clearVal, len);
+ }
+ else {
+ /* general case */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte *stencil = rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ stencil[j] = clearVal;
+ }
+ }
+ }
+ }
+ }
+ else {
+ /* no direct access */
+ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
+ /* need to mask the clear */
+ 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 {
+ /* no bit masking */
+ const GLubyte clear8 = clearVal;
+ GLint i;
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, &clear8, NULL);
+ }
+ }
+ }
+}
+
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.h
new file mode 100644
index 000000000..fabc25250
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_stencil.h
@@ -0,0 +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 "mtypes.h"
+#include "swrast.h"
+
+
+
+extern GLboolean
+_swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *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
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_tcc.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_tcc.c
new file mode 100644
index 000000000..550a2aabd
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_tcc.c
@@ -0,0 +1,189 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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.
+ */
+
+/* An attempt to hook s_fragprog_to_c.c up to libtcc.a to try &
+ * generate some real code.
+ *
+ * TCC isn't threadsafe, so it will need additional locking help if we
+ * end up using it as a backend in mesa.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "nvfragprog.h"
+#include "macros.h"
+#include "program.h"
+
+#include "s_nvfragprog.h"
+#include "s_texture.h"
+
+#ifdef USE_TCC
+
+#include <libtcc.h>
+
+typedef int (*cfunc)( void *ctx,
+ const GLfloat (*local_param)[4],
+ const GLfloat (*env_param)[4],
+ const struct program_parameter *state_param,
+ const GLfloat (*interp)[4],
+ GLfloat (*outputs)[4]);
+
+
+static cfunc current_func;
+static struct fragment_program *current_program;
+static TCCState *current_tcc_state;
+
+
+static void TEX( void *cc, const float *texcoord, int unit, float *result )
+{
+ GLcontext *ctx = (GLcontext *)cc;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat lambda = 1.0; /* hack */
+ GLchan rgba[4];
+
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+
+ result[0] = CHAN_TO_FLOAT(rgba[0]);
+ result[1] = CHAN_TO_FLOAT(rgba[1]);
+ result[2] = CHAN_TO_FLOAT(rgba[2]);
+ result[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+static void TXB( void *cc, const float *texcoord, int unit, float *result )
+{
+ GLcontext *ctx = (GLcontext *)cc;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat lambda = 1.0; /* hack */
+ GLchan rgba[4];
+
+ /* texcoord[3] is the bias to add to lambda */
+ lambda += texcoord[3];
+
+
+ /* Is it necessary to reset texcoord[3] to 1 at this point?
+ */
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+
+ result[0] = CHAN_TO_FLOAT(rgba[0]);
+ result[1] = CHAN_TO_FLOAT(rgba[1]);
+ result[2] = CHAN_TO_FLOAT(rgba[2]);
+ result[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+static void TXP( void *cc, const float *texcoord, int unit, float *result )
+{
+ /* I think that TEX needs to undo the perspective divide which has
+ * already occurred. In the meantime, TXP is correct to do this:
+ */
+ TEX( cc, texcoord, unit, result );
+}
+
+
+static cfunc codegen( TCCState *s, const char *prog, const char *fname )
+{
+ unsigned long val;
+
+ if (s)
+ tcc_delete(s);
+
+ s = tcc_new();
+ if (!s)
+ return 0;
+
+ tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
+ tcc_compile_string(s, prog);
+
+/* tcc_add_dll("/usr/lib/libm.so"); */
+
+ tcc_add_symbol(s, "TEX", (unsigned long)&TEX);
+ tcc_add_symbol(s, "TXB", (unsigned long)&TXB);
+ tcc_add_symbol(s, "TXP", (unsigned long)&TXP);
+
+
+ tcc_relocate(s);
+ tcc_get_symbol(s, &val, fname);
+ return (cfunc) val;
+}
+
+/* TCC isn't threadsafe and even seems not to like having more than
+ * one TCCState created or used at any one time in a single threaded
+ * environment. So, this code is all for investigation only and can't
+ * currently be used in Mesa proper.
+ *
+ * I've taken some liberties with globals myself, now.
+ */
+GLboolean
+_swrast_execute_codegen_program( GLcontext *ctx,
+ const struct fragment_program *program, GLuint maxInst,
+ struct fp_machine *machine, const struct sw_span *span,
+ GLuint column )
+{
+ if (program != current_program) {
+
+ _swrast_translate_program( ctx );
+
+ fprintf(stderr, "%s: compiling:\n%s\n", __FUNCTION__, program->c_str);
+
+ current_program = program;
+ current_func = codegen( current_tcc_state, program->c_str,
+ "run_program" );
+ }
+
+ assert(current_func);
+
+ return current_func( ctx,
+ program->Base.LocalParams,
+ (const GLfloat (*)[4])ctx->FragmentProgram.Parameters,
+ program->Parameters->Parameters,
+ (const GLfloat (*)[4])machine->Inputs,
+ machine->Outputs );
+}
+
+#else /* USE_TCC */
+
+GLboolean
+_swrast_execute_codegen_program( GLcontext *ctx,
+ const struct fragment_program *program, GLuint maxInst,
+ struct fp_machine *machine, const struct sw_span *span,
+ GLuint column )
+{
+ (void) ctx;
+ (void) program; (void) maxInst;
+ (void) machine; (void) span;
+ (void) column;
+ return 0;
+}
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_texstore.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_texstore.c
new file mode 100644
index 000000000..24470a735
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_texstore.c
@@ -0,0 +1,430 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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:
+ * Brian Paul
+ */
+
+
+/*
+ * The functions in this file are mostly related to software texture fallbacks.
+ * This includes texture image transfer/packing and texel fetching.
+ * Hardware drivers will likely override most of this.
+ */
+
+
+
+#include "glheader.h"
+#include "imports.h"
+#include "colormac.h"
+#include "context.h"
+#include "convolve.h"
+#include "image.h"
+#include "macros.h"
+#include "texformat.h"
+#include "teximage.h"
+#include "texstore.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_span.h"
+
+/*
+ * Read an RGBA image from the frame buffer.
+ * This is used by glCopyTex[Sub]Image[12]D().
+ * Input: ctx - the context
+ * x, y - lower left corner
+ * width, height - size of region to read
+ * Return: pointer to block of GL_RGBA, GLchan data.
+ */
+static GLchan *
+read_color_image( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint stride, i;
+ GLchan *image, *dst;
+
+ image = (GLchan *) _mesa_malloc(width * height * 4 * sizeof(GLchan));
+ if (!image)
+ return NULL;
+
+ /* Select buffer to read from */
+ _swrast_use_read_buffer(ctx);
+
+ RENDER_START(swrast,ctx);
+
+ dst = image;
+ stride = width * 4;
+ for (i = 0; i < height; i++) {
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, x, y + i, (GLchan (*)[4]) dst);
+ dst += stride;
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ /* Read from draw buffer (the default) */
+ _swrast_use_draw_buffer(ctx);
+
+ return image;
+}
+
+
+/*
+ * As above, but read data from depth buffer.
+ */
+static GLfloat *
+read_depth_image( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height )
+{
+ struct gl_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat *image, *dst;
+ GLint i;
+
+ image = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat));
+ if (!image)
+ return NULL;
+
+ RENDER_START(swrast,ctx);
+
+ dst = image;
+ for (i = 0; i < height; i++) {
+ _swrast_read_depth_span_float(ctx, rb, width, x, y + i, dst);
+ dst += width;
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ return image;
+}
+
+
+
+static GLboolean
+is_depth_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16_SGIX:
+ case GL_DEPTH_COMPONENT24_SGIX:
+ case GL_DEPTH_COMPONENT32_SGIX:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexImage1D().
+ */
+void
+_swrast_copy_teximage1d( GLcontext *ctx, GLenum target, GLint level,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLint border )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ ASSERT(texObj);
+ texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage1D);
+
+ if (is_depth_format(internalFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, 1);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
+ width, border,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, width, 1);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
+ width, border,
+ GL_RGBA, CHAN_TYPE, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexImage2D().
+ */
+void
+_swrast_copy_teximage2d( GLcontext *ctx, GLenum target, GLint level,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLint border )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ ASSERT(texObj);
+ texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage2D);
+
+ if (is_depth_format(internalFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
+ return;
+ }
+
+ /* call glTexImage2D to redefine the texture */
+ (*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
+ width, height, border,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
+ return;
+ }
+
+ /* call glTexImage2D to redefine the texture */
+ (*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
+ width, height, border,
+ GL_RGBA, CHAN_TYPE, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexSubImage1D().
+ */
+void
+_swrast_copy_texsubimage1d( GLcontext *ctx, GLenum target, GLint level,
+ GLint xoffset, GLint x, GLint y, GLsizei width )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ ASSERT(texObj);
+ texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage1D);
+
+ if (texImage->Format == GL_DEPTH_COMPONENT) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, 1);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D");
+ return;
+ }
+
+ /* call glTexSubImage1D to redefine the texture */
+ (*ctx->Driver.TexSubImage1D)(ctx, target, level, xoffset, width,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, width, 1);
+ if (!image) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D" );
+ return;
+ }
+
+ /* now call glTexSubImage1D to do the real work */
+ (*ctx->Driver.TexSubImage1D)(ctx, target, level, xoffset, width,
+ GL_RGBA, CHAN_TYPE, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexSubImage2D().
+ */
+void
+_swrast_copy_texsubimage2d( GLcontext *ctx,
+ GLenum target, GLint level,
+ GLint xoffset, GLint yoffset,
+ GLint x, GLint y, GLsizei width, GLsizei height )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ ASSERT(texObj);
+ texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage2D);
+
+ if (texImage->Format == GL_DEPTH_COMPONENT) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexSubImage2D)(ctx, target, level,
+ xoffset, yoffset, width, height,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
+ return;
+ }
+
+ /* now call glTexSubImage2D to do the real work */
+ (*ctx->Driver.TexSubImage2D)(ctx, target, level,
+ xoffset, yoffset, width, height,
+ GL_RGBA, CHAN_TYPE, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexSubImage3D().
+ */
+void
+_swrast_copy_texsubimage3d( GLcontext *ctx,
+ GLenum target, GLint level,
+ GLint xoffset, GLint yoffset, GLint zoffset,
+ GLint x, GLint y, GLsizei width, GLsizei height )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ ASSERT(texObj);
+ texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage3D);
+
+ if (texImage->Format == GL_DEPTH_COMPONENT) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexSubImage3D)(ctx, target, level,
+ xoffset, yoffset, zoffset, width, height, 1,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D" );
+ return;
+ }
+
+ /* now call glTexSubImage3D to do the real work */
+ (*ctx->Driver.TexSubImage3D)(ctx, target, level,
+ xoffset, yoffset, zoffset, width, height, 1,
+ GL_RGBA, CHAN_TYPE, image,
+ &ctx->DefaultPacking, texObj, texImage);
+ _mesa_free(image);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.c
new file mode 100644
index 000000000..c75d826d2
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.c
@@ -0,0 +1,3963 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "macros.h"
+#include "imports.h"
+#include "pixel.h"
+#include "texformat.h"
+#include "teximage.h"
+
+#include "s_context.h"
+#include "s_texture.h"
+
+
+/**
+ * Constants for integer linear interpolation.
+ */
+#define ILERP_SCALE 65536.0F
+#define ILERP_SHIFT 16
+
+
+/**
+ * Linear interpolation macros
+ */
+#define LERP(T, A, B) ( (A) + (T) * ((B) - (A)) )
+#define ILERP(IT, A, B) ( (A) + (((IT) * ((B) - (A))) >> ILERP_SHIFT) )
+
+
+/**
+ * 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 2D/biliner interpolation of integer values.
+ * \sa lerp_2d
+ */
+static INLINE GLint
+ilerp_2d(GLint ia, GLint ib,
+ GLint v00, GLint v10, GLint v01, GLint v11)
+{
+ /* fixed point interpolants in [0, ILERP_SCALE] */
+ const GLint temp0 = ILERP(ia, v00, v10);
+ const GLint temp1 = ILERP(ia, v01, v11);
+ return ILERP(ib, 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 3D/trilinear interpolation of integer values.
+ * \sa lerp_2d
+ */
+static INLINE GLint
+ilerp_3d(GLint ia, GLint ib, GLint ic,
+ GLint v000, GLint v100, GLint v010, GLint v110,
+ GLint v001, GLint v101, GLint v011, GLint v111)
+{
+ /* fixed point interpolants in [0, ILERP_SCALE] */
+ const GLint temp00 = ILERP(ia, v000, v100);
+ const GLint temp10 = ILERP(ia, v010, v110);
+ const GLint temp01 = ILERP(ia, v001, v101);
+ const GLint temp11 = ILERP(ia, v011, v111);
+ const GLint temp0 = ILERP(ib, temp00, temp10);
+ const GLint temp1 = ILERP(ib, temp01, temp11);
+ return ILERP(ic, temp0, temp1);
+}
+
+
+
+/**
+ * Compute the remainder of a divided by b, but be careful with
+ * negative values so that GL_REPEAT mode works right.
+ */
+static INLINE GLint
+repeat_remainder(GLint a, GLint b)
+{
+ if (a >= 0)
+ return a % b;
+ else
+ return (a + 1) % b + b - 1;
+}
+
+
+/**
+ * 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:
+ * U = texcoord in [0, width]
+ * I0, I1 = two nearest texel indexes
+ */
+#define COMPUTE_LINEAR_TEXEL_LOCATIONS(wrapMode, S, U, SIZE, I0, I1) \
+{ \
+ if (wrapMode == GL_REPEAT) { \
+ U = S * SIZE - 0.5F; \
+ if (tObj->_IsPowerOfTwo) { \
+ I0 = IFLOOR(U) & (SIZE - 1); \
+ I1 = (I0 + 1) & (SIZE - 1); \
+ } \
+ else { \
+ I0 = repeat_remainder(IFLOOR(U), SIZE); \
+ I1 = repeat_remainder(I0 + 1, SIZE); \
+ } \
+ } \
+ else if (wrapMode == 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; \
+ } \
+ else if (wrapMode == 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; \
+ } \
+ else if (wrapMode == GL_MIRRORED_REPEAT) { \
+ const GLint flr = IFLOOR(S); \
+ if (flr & 1) \
+ U = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \
+ else \
+ U = S - (GLfloat) flr; /* flr is even */ \
+ U = (U * SIZE) - 0.5F; \
+ I0 = IFLOOR(U); \
+ I1 = I0 + 1; \
+ if (I0 < 0) \
+ I0 = 0; \
+ if (I1 >= (GLint) SIZE) \
+ I1 = SIZE - 1; \
+ } \
+ else if (wrapMode == GL_MIRROR_CLAMP_EXT) { \
+ U = (GLfloat) fabs(S); \
+ if (U >= 1.0F) \
+ U = (GLfloat) SIZE; \
+ else \
+ U *= SIZE; \
+ U -= 0.5F; \
+ I0 = IFLOOR(U); \
+ I1 = I0 + 1; \
+ } \
+ else if (wrapMode == GL_MIRROR_CLAMP_TO_EDGE_EXT) { \
+ U = (GLfloat) fabs(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; \
+ } \
+ else if (wrapMode == GL_MIRROR_CLAMP_TO_BORDER_EXT) { \
+ const GLfloat min = -1.0F / (2.0F * SIZE); \
+ const GLfloat max = 1.0F - min; \
+ U = (GLfloat) fabs(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; \
+ } \
+ else { \
+ ASSERT(wrapMode == 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; \
+ } \
+}
+
+
+/**
+ * Used to compute texel location for nearest sampling.
+ */
+#define COMPUTE_NEAREST_TEXEL_LOCATION(wrapMode, S, SIZE, I) \
+{ \
+ if (wrapMode == GL_REPEAT) { \
+ /* s limited to [0,1) */ \
+ /* i limited to [0,size-1] */ \
+ I = IFLOOR(S * SIZE); \
+ if (tObj->_IsPowerOfTwo) \
+ I &= (SIZE - 1); \
+ else \
+ I = repeat_remainder(I, SIZE); \
+ } \
+ else if (wrapMode == 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); \
+ } \
+ else if (wrapMode == 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); \
+ } \
+ else if (wrapMode == 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); /* flr is odd */ \
+ else \
+ u = S - (GLfloat) flr; /* flr is even */ \
+ if (u < min) \
+ I = 0; \
+ else if (u > max) \
+ I = SIZE - 1; \
+ else \
+ I = IFLOOR(u * SIZE); \
+ } \
+ else if (wrapMode == GL_MIRROR_CLAMP_EXT) { \
+ /* s limited to [0,1] */ \
+ /* i limited to [0,size-1] */ \
+ const GLfloat u = (GLfloat) fabs(S); \
+ if (u <= 0.0F) \
+ I = 0; \
+ else if (u >= 1.0F) \
+ I = SIZE - 1; \
+ else \
+ I = IFLOOR(u * SIZE); \
+ } \
+ else if (wrapMode == 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 = (GLfloat) fabs(S); \
+ if (u < min) \
+ I = 0; \
+ else if (u > max) \
+ I = SIZE - 1; \
+ else \
+ I = IFLOOR(u * SIZE); \
+ } \
+ else if (wrapMode == 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 = (GLfloat) fabs(S); \
+ if (u < min) \
+ I = -1; \
+ else if (u > max) \
+ I = SIZE; \
+ else \
+ I = IFLOOR(u * SIZE); \
+ } \
+ else { \
+ ASSERT(wrapMode == 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); \
+ } \
+}
+
+
+/* Power of two image sizes only */
+#define COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(S, U, SIZE, I0, I1) \
+{ \
+ U = S * SIZE - 0.5F; \
+ I0 = IFLOOR(U) & (SIZE - 1); \
+ I1 = (I0 + 1) & (SIZE - 1); \
+}
+
+
+/*
+ * Compute linear mipmap levels for given lambda.
+ */
+#define COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda, level) \
+{ \
+ if (lambda < 0.0F) \
+ level = tObj->BaseLevel; \
+ else if (lambda > tObj->_MaxLambda) \
+ level = (GLint) (tObj->BaseLevel + tObj->_MaxLambda); \
+ else \
+ level = (GLint) (tObj->BaseLevel + lambda); \
+}
+
+
+/*
+ * Compute nearest mipmap level for given lambda.
+ */
+#define COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda, level) \
+{ \
+ GLfloat l; \
+ 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; \
+}
+
+
+
+/*
+ * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes
+ * see 1-pixel bands of improperly weighted linear-sampled texels. 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))
+
+
+
+/*
+ * 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( GLfloat minMagThresh, GLuint n, const GLfloat lambda[],
+ GLuint *minStart, GLuint *minEnd,
+ GLuint *magStart, GLuint *magEnd )
+{
+ ASSERT(lambda != NULL);
+#if 0
+ /* Verify that lambda[] is monotonous.
+ * 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 */
+
+ /* since lambda is monotonous-array use this check first */
+ if (lambda[0] <= minMagThresh && lambda[n-1] <= minMagThresh) {
+ /* magnification for whole span */
+ *magStart = 0;
+ *magEnd = n;
+ *minStart = *minEnd = 0;
+ }
+ else if (lambda[0] > minMagThresh && 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
+}
+
+
+/**********************************************************************/
+/* 1-D Texture Sampling Functions */
+/**********************************************************************/
+
+/*
+ * Return the texture sample for coordinate (s) using GL_NEAREST filter.
+ */
+static void
+sample_1d_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4], GLchan rgba[4])
+{
+ const GLint width = img->Width2; /* without border, power of two */
+ GLint i;
+ (void) ctx;
+
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i);
+
+ /* 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 */
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i, 0, 0, rgba);
+ }
+}
+
+
+
+/*
+ * Return the texture sample for coordinate (s) using GL_LINEAR filter.
+ */
+static void
+sample_1d_linear(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4], GLchan rgba[4])
+{
+ const GLint width = img->Width2;
+ GLint i0, i1;
+ GLfloat u;
+ GLuint useBorderColor;
+ (void) ctx;
+
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1);
+
+ useBorderColor = 0;
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ }
+ else {
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ }
+
+ {
+ const GLfloat a = FRAC(u);
+ GLchan t0[4], t1[4]; /* texels */
+
+ /* fetch texel colors */
+ if (useBorderColor & I0BIT) {
+ COPY_CHAN4(t0, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, 0, 0, t0);
+ }
+ if (useBorderColor & I1BIT) {
+ COPY_CHAN4(t1, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, 0, 0, t1);
+ }
+
+ /* do linear interpolation of texel colors */
+#if CHAN_TYPE == GL_FLOAT
+ rgba[0] = LERP(a, t0[0], t1[0]);
+ rgba[1] = LERP(a, t0[1], t1[1]);
+ rgba[2] = LERP(a, t0[2], t1[2]);
+ rgba[3] = LERP(a, t0[3], t1[3]);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ rgba[0] = (GLchan) (LERP(a, t0[0], t1[0]) + 0.5);
+ rgba[1] = (GLchan) (LERP(a, t0[1], t1[1]) + 0.5);
+ rgba[2] = (GLchan) (LERP(a, t0[2], t1[2]) + 0.5);
+ rgba[3] = (GLchan) (LERP(a, t0[3], t1[3]) + 0.5);
+#else
+ ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE);
+ {
+ /* fixed point interpolants in [0, ILERP_SCALE] */
+ const GLint ia = IROUND_POS(a * ILERP_SCALE);
+ rgba[0] = ILERP(ia, t0[0], t1[0]);
+ rgba[1] = ILERP(ia, t0[1], t1[1]);
+ rgba[2] = ILERP(ia, t0[2], t1[2]);
+ rgba[3] = ILERP(ia, t0[3], t1[3]);
+ }
+#endif
+ }
+}
+
+
+static void
+sample_1d_nearest_mipmap_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ sample_1d_linear(ctx, tObj, tObj->Image[0][level], texcoord[i], rgba[i]);
+ }
+}
+
+
+
+/*
+ * This is really just needed in order to prevent warnings with some compilers.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define CHAN_CAST
+#else
+#define CHAN_CAST (GLchan) (GLint)
+#endif
+
+
+static void
+sample_1d_nearest_mipmap_linear(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+
+static void
+sample_1d_linear_mipmap_linear(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+
+static void
+sample_nearest_1d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_1d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+static void
+sample_linear_1d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_1d_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/*
+ * Given an (s) texture coordinate and lambda (level of detail) value,
+ * return a texture sample.
+ *
+ */
+static void
+sample_lambda_1d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit],
+ 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],
+ GLchan 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;
+
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoord[1], height, j);
+
+ /* 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 */
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(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],
+ GLchan rgba[])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ GLint i0, j0, i1, j1;
+ GLuint useBorderColor;
+ GLfloat u, v;
+ (void) ctx;
+
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1);
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoord[1], v, height, j0, j1);
+
+ useBorderColor = 0;
+ 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;
+ }
+
+ {
+ const GLfloat a = FRAC(u);
+ const GLfloat b = FRAC(v);
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ const GLint ia = IROUND_POS(a * ILERP_SCALE);
+ const GLint ib = IROUND_POS(b * ILERP_SCALE);
+#endif
+ GLchan t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */
+
+ /* fetch four texel colors */
+ if (useBorderColor & (I0BIT | J0BIT)) {
+ COPY_CHAN4(t00, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j0, 0, t00);
+ }
+ if (useBorderColor & (I1BIT | J0BIT)) {
+ COPY_CHAN4(t10, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j0, 0, t10);
+ }
+ if (useBorderColor & (I0BIT | J1BIT)) {
+ COPY_CHAN4(t01, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j1, 0, t01);
+ }
+ if (useBorderColor & (I1BIT | J1BIT)) {
+ COPY_CHAN4(t11, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j1, 0, t11);
+ }
+
+ /* do bilinear interpolation of texel colors */
+#if CHAN_TYPE == GL_FLOAT
+ rgba[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]);
+ rgba[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]);
+ rgba[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]);
+ rgba[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ rgba[0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5);
+ rgba[1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5);
+ rgba[2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5);
+ rgba[3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5);
+#else
+ ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE);
+ rgba[0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]);
+ rgba[1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]);
+ rgba[2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]);
+ rgba[3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]);
+#endif
+ }
+}
+
+
+/*
+ * As above, but we know WRAP_S == REPEAT and WRAP_T == REPEAT.
+ */
+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],
+ GLchan rgba[])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ GLint i0, j0, i1, j1;
+ GLfloat u, v;
+ (void) ctx;
+ (void) tObj;
+
+ ASSERT(tObj->WrapS == GL_REPEAT);
+ ASSERT(tObj->WrapT == GL_REPEAT);
+ ASSERT(img->Border == 0);
+ ASSERT(img->Format != GL_COLOR_INDEX);
+ ASSERT(img->_IsPowerOfTwo);
+
+ COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(texcoord[0], u, width, i0, i1);
+ COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(texcoord[1], v, height, j0, j1);
+
+ {
+ const GLfloat a = FRAC(u);
+ const GLfloat b = FRAC(v);
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ const GLint ia = IROUND_POS(a * ILERP_SCALE);
+ const GLint ib = IROUND_POS(b * ILERP_SCALE);
+#endif
+ GLchan t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */
+
+ img->FetchTexelc(img, i0, j0, 0, t00);
+ img->FetchTexelc(img, i1, j0, 0, t10);
+ img->FetchTexelc(img, i0, j1, 0, t01);
+ img->FetchTexelc(img, i1, j1, 0, t11);
+
+ /* do bilinear interpolation of texel colors */
+#if CHAN_TYPE == GL_FLOAT
+ rgba[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]);
+ rgba[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]);
+ rgba[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]);
+ rgba[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ rgba[0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5);
+ rgba[1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5);
+ rgba[2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5);
+ rgba[3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5);
+#else
+ ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE);
+ rgba[0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]);
+ rgba[1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]);
+ rgba[2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]);
+ rgba[3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]);
+#endif
+ }
+}
+
+
+
+static void
+sample_2d_nearest_mipmap_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+
+/* Trilinear filtering */
+static void
+sample_2d_linear_mipmap_linear( GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+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[], GLchan rgba[][4] )
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ ASSERT(tObj->WrapS == GL_REPEAT);
+ ASSERT(tObj->WrapT == GL_REPEAT);
+ ASSERT(tObj->_IsPowerOfTwo);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+static void
+sample_nearest_2d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_2d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+static void
+sample_linear_2d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ if (tObj->WrapS == GL_REPEAT && tObj->WrapT == GL_REPEAT
+ && 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, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan 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) texUnit;
+ (void) lambda;
+ ASSERT(tObj->WrapS==GL_REPEAT);
+ ASSERT(tObj->WrapT==GL_REPEAT);
+ ASSERT(img->Border==0);
+ ASSERT(img->Format==GL_RGB);
+ 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;
+ GLchan *texel = ((GLchan *) img->Data) + 3*pos;
+ rgba[k][RCOMP] = texel[0];
+ rgba[k][GCOMP] = texel[1];
+ rgba[k][BCOMP] = texel[2];
+ }
+}
+
+
+/*
+ * 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, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan 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) texUnit;
+ (void) lambda;
+ ASSERT(tObj->WrapS==GL_REPEAT);
+ ASSERT(tObj->WrapT==GL_REPEAT);
+ ASSERT(img->Border==0);
+ ASSERT(img->Format==GL_RGBA);
+ 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 GLchan *texel = ((GLchan *) img->Data) + (pos << 2); /* pos*4 */
+ COPY_CHAN4(rgba[i], texel);
+ }
+}
+
+
+/*
+ * Given an array of texture coordinate and lambda (level of detail)
+ * values, return an array of texture sample.
+ */
+static void
+sample_lambda_2d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan 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->Format != GL_COLOR_INDEX)
+ && tImg->_IsPowerOfTwo;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit],
+ 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->MesaFormat) {
+ case MESA_FORMAT_RGB:
+ case MESA_FORMAT_RGB888:
+ /*case MESA_FORMAT_BGR888:*/
+ opt_sample_rgb_2d(ctx, texUnit, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ break;
+ case MESA_FORMAT_RGBA:
+ case MESA_FORMAT_RGBA8888:
+ case MESA_FORMAT_ARGB8888:
+ /*case MESA_FORMAT_ABGR8888:*/
+ /*case MESA_FORMAT_BGRA8888:*/
+ opt_sample_rgba_2d(ctx, texUnit, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ break;
+ default:
+ sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart );
+ }
+ }
+ else {
+ sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + minStart,
+ NULL, rgba + minStart);
+ }
+ break;
+ case GL_LINEAR:
+ sample_linear_2d(ctx, texUnit, 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->MesaFormat) {
+ case MESA_FORMAT_RGB:
+ case MESA_FORMAT_RGB888:
+ /*case MESA_FORMAT_BGR888:*/
+ opt_sample_rgb_2d(ctx, texUnit, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ break;
+ case MESA_FORMAT_RGBA:
+ case MESA_FORMAT_RGBA8888:
+ case MESA_FORMAT_ARGB8888:
+ /*case MESA_FORMAT_ABGR8888:*/
+ /*case MESA_FORMAT_BGRA8888:*/
+ opt_sample_rgba_2d(ctx, texUnit, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ break;
+ default:
+ sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart );
+ }
+ }
+ else {
+ sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + magStart,
+ NULL, rgba + magStart);
+ }
+ break;
+ case GL_LINEAR:
+ sample_linear_2d(ctx, texUnit, 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 void
+sample_3d_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLchan 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;
+
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoord[1], height, j);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapR, texcoord[2], depth, k);
+
+ 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 */
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(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],
+ GLchan rgba[4])
+{
+ const GLint width = img->Width2;
+ const GLint height = img->Height2;
+ const GLint depth = img->Depth2;
+ GLint i0, j0, k0, i1, j1, k1;
+ GLuint useBorderColor;
+ GLfloat u, v, w;
+ (void) ctx;
+
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1);
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoord[1], v, height, j0, j1);
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapR, texcoord[2], w, depth, k0, k1);
+
+ useBorderColor = 0;
+ 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;
+ }
+
+ {
+ const GLfloat a = FRAC(u);
+ const GLfloat b = FRAC(v);
+ const GLfloat c = FRAC(w);
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ const GLint ia = IROUND_POS(a * ILERP_SCALE);
+ const GLint ib = IROUND_POS(b * ILERP_SCALE);
+ const GLint ic = IROUND_POS(c * ILERP_SCALE);
+#endif
+ GLchan t000[4], t010[4], t001[4], t011[4];
+ GLchan t100[4], t110[4], t101[4], t111[4];
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | J0BIT | K0BIT)) {
+ COPY_CHAN4(t000, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j0, k0, t000);
+ }
+ if (useBorderColor & (I1BIT | J0BIT | K0BIT)) {
+ COPY_CHAN4(t100, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j0, k0, t100);
+ }
+ if (useBorderColor & (I0BIT | J1BIT | K0BIT)) {
+ COPY_CHAN4(t010, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j1, k0, t010);
+ }
+ if (useBorderColor & (I1BIT | J1BIT | K0BIT)) {
+ COPY_CHAN4(t110, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j1, k0, t110);
+ }
+
+ if (useBorderColor & (I0BIT | J0BIT | K1BIT)) {
+ COPY_CHAN4(t001, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j0, k1, t001);
+ }
+ if (useBorderColor & (I1BIT | J0BIT | K1BIT)) {
+ COPY_CHAN4(t101, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j0, k1, t101);
+ }
+ if (useBorderColor & (I0BIT | J1BIT | K1BIT)) {
+ COPY_CHAN4(t011, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j1, k1, t011);
+ }
+ if (useBorderColor & (I1BIT | J1BIT | K1BIT)) {
+ COPY_CHAN4(t111, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j1, k1, t111);
+ }
+
+ /* trilinear interpolation of samples */
+#if CHAN_TYPE == GL_FLOAT
+ rgba[0] = lerp_3d(a, b, c,
+ t000[0], t100[0], t010[0], t110[0],
+ t001[0], t101[0], t011[0], t111[0]);
+ rgba[1] = lerp_3d(a, b, c,
+ t000[1], t100[1], t010[1], t110[1],
+ t001[1], t101[1], t011[1], t111[1]);
+ rgba[2] = lerp_3d(a, b, c,
+ t000[2], t100[2], t010[2], t110[2],
+ t001[2], t101[2], t011[2], t111[2]);
+ rgba[3] = lerp_3d(a, b, c,
+ t000[3], t100[3], t010[3], t110[3],
+ t001[3], t101[3], t011[3], t111[3]);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ rgba[0] = (GLchan) (lerp_3d(a, b, c,
+ t000[0], t100[0], t010[0], t110[0],
+ t001[0], t101[0], t011[0], t111[0]) + 0.5F);
+ rgba[1] = (GLchan) (lerp_3d(a, b, c,
+ t000[1], t100[1], t010[1], t110[1],
+ t001[1], t101[1], t011[1], t111[1]) + 0.5F);
+ rgba[2] = (GLchan) (lerp_3d(a, b, c,
+ t000[2], t100[2], t010[2], t110[2],
+ t001[2], t101[2], t011[2], t111[2]) + 0.5F);
+ rgba[3] = (GLchan) (lerp_3d(a, b, c,
+ t000[3], t100[3], t010[3], t110[3],
+ t001[3], t101[3], t011[3], t111[3]) + 0.5F);
+#else
+ ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE);
+ rgba[0] = ilerp_3d(ia, ib, ic,
+ t000[0], t100[0], t010[0], t110[0],
+ t001[0], t101[0], t011[0], t111[0]);
+ rgba[1] = ilerp_3d(ia, ib, ic,
+ t000[1], t100[1], t010[1], t110[1],
+ t001[1], t101[1], t011[1], t111[1]);
+ rgba[2] = ilerp_3d(ia, ib, ic,
+ t000[2], t100[2], t010[2], t110[2],
+ t001[2], t101[2], t011[2], t111[2]);
+ rgba[3] = ilerp_3d(ia, ib, ic,
+ t000[3], t100[3], t010[3], t110[3],
+ t001[3], t101[3], t011[3], t111[3]);
+#endif
+ }
+}
+
+
+
+static void
+sample_3d_nearest_mipmap_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_3d_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+static void
+sample_3d_linear_mipmap_linear(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ if (level >= tObj->_MaxLevel) {
+ sample_3d_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+static void
+sample_nearest_3d(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4])
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_3d_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+static void
+sample_linear_3d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] )
+{
+ GLuint i;
+ struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
+ (void) texUnit;
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_3d_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/*
+ * Given an (s,t,r) texture coordinate and lambda (level of detail) value,
+ * return a texture sample.
+ */
+static void
+sample_lambda_3d( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4] )
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit],
+ 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 struct gl_texture_image **imgArray;
+ const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz);
+ GLfloat sc, tc, ma;
+
+ if (arx > ary && arx > arz) {
+ if (rx >= 0.0F) {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_X];
+ sc = -rz;
+ tc = -ry;
+ ma = arx;
+ }
+ else {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_X];
+ sc = rz;
+ tc = -ry;
+ ma = arx;
+ }
+ }
+ else if (ary > arx && ary > arz) {
+ if (ry >= 0.0F) {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_Y];
+ sc = rx;
+ tc = rz;
+ ma = ary;
+ }
+ else {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_Y];
+ sc = rx;
+ tc = -rz;
+ ma = ary;
+ }
+ }
+ else {
+ if (rz > 0.0F) {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_Z];
+ sc = rx;
+ tc = -ry;
+ ma = arz;
+ }
+ else {
+ imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_Z];
+ sc = -rx;
+ tc = -ry;
+ ma = arz;
+ }
+ }
+
+ newCoord[0] = ( sc / ma + 1.0F ) * 0.5F;
+ newCoord[1] = ( tc / ma + 1.0F ) * 0.5F;
+ return imgArray;
+}
+
+
+static void
+sample_nearest_cube(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ (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, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ (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, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ sample_2d_nearest(ctx, tObj, images[level], newCoord, rgba[i]);
+ }
+}
+
+
+static void
+sample_cube_linear_mipmap_nearest(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level;
+ COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level);
+ 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, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_nearest(ctx, tObj, images[tObj->_MaxLevel],
+ newCoord, rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+static void
+sample_cube_linear_mipmap_linear(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoord[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ GLuint i;
+ (void) texUnit;
+ ASSERT(lambda != NULL);
+ for (i = 0; i < n; i++) {
+ const struct gl_texture_image **images;
+ GLfloat newCoord[4];
+ GLint level;
+ COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level);
+ images = choose_cube_face(tObj, texcoord[i], newCoord);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_linear(ctx, tObj, images[tObj->_MaxLevel],
+ newCoord, rgba[i]);
+ }
+ else {
+ GLchan 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);
+ rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]);
+ rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]);
+ rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]);
+ rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]);
+ }
+ }
+}
+
+
+static void
+sample_lambda_cube( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4])
+{
+ GLuint minStart, minEnd; /* texels with minification */
+ GLuint magStart, magEnd; /* texels with magnification */
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit],
+ 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, texUnit, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR:
+ sample_linear_cube(ctx, texUnit, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_cube_nearest_mipmap_nearest(ctx, texUnit, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_cube_linear_mipmap_nearest(ctx, texUnit, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_cube_nearest_mipmap_linear(ctx, texUnit, tObj, m,
+ texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_cube_linear_mipmap_linear(ctx, texUnit, 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, texUnit, tObj, m, texcoords + magStart,
+ lambda + magStart, rgba + magStart);
+ break;
+ case GL_LINEAR:
+ sample_linear_cube(ctx, texUnit, 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, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][0];
+ const GLfloat width = (GLfloat) img->Width;
+ const GLfloat height = (GLfloat) img->Height;
+ const GLint width_minus_1 = img->Width - 1;
+ const GLint height_minus_1 = img->Height - 1;
+ GLuint i;
+
+ (void) ctx;
+ (void) texUnit;
+ (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->Format != GL_COLOR_INDEX);
+
+ /* XXX move Wrap mode tests outside of loops for common cases */
+ for (i = 0; i < n; i++) {
+ GLint row, col;
+ /* NOTE: we DO NOT use [0, 1] texture coordinates! */
+ if (tObj->WrapS == GL_CLAMP) {
+ col = IFLOOR( CLAMP(texcoords[i][0], 0.0F, width - 1) );
+ }
+ else if (tObj->WrapS == GL_CLAMP_TO_EDGE) {
+ col = IFLOOR( CLAMP(texcoords[i][0], 0.5F, width - 0.5F) );
+ }
+ else {
+ col = IFLOOR( CLAMP(texcoords[i][0], -0.5F, width + 0.5F) );
+ }
+ if (tObj->WrapT == GL_CLAMP) {
+ row = IFLOOR( CLAMP(texcoords[i][1], 0.0F, height - 1) );
+ }
+ else if (tObj->WrapT == GL_CLAMP_TO_EDGE) {
+ row = IFLOOR( CLAMP(texcoords[i][1], 0.5F, height - 0.5F) );
+ }
+ else {
+ row = IFLOOR( CLAMP(texcoords[i][1], -0.5F, height + 0.5F) );
+ }
+
+ if (col < 0 || col > width_minus_1 || row < 0 || row > height_minus_1)
+ COPY_CHAN4(rgba[i], tObj->_BorderChan);
+ else
+ img->FetchTexelc(img, col, row, 0, rgba[i]);
+ }
+}
+
+
+static void
+sample_linear_rect(GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4])
+{
+ const struct gl_texture_image *img = tObj->Image[0][0];
+ const GLfloat width = (GLfloat) img->Width;
+ const GLfloat height = (GLfloat) img->Height;
+ const GLint width_minus_1 = img->Width - 1;
+ const GLint height_minus_1 = img->Height - 1;
+ GLuint i;
+
+ (void) ctx;
+ (void) texUnit;
+ (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->Format != GL_COLOR_INDEX);
+
+ /* XXX lots of opportunity for optimization in this loop */
+ for (i = 0; i < n; i++) {
+ GLfloat frow, fcol;
+ GLint i0, j0, i1, j1;
+ GLchan t00[4], t01[4], t10[4], t11[4];
+ GLfloat a, b;
+ GLuint useBorderColor = 0;
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ GLint ia, ib;
+#endif
+
+ /* NOTE: we DO NOT use [0, 1] texture coordinates! */
+ if (tObj->WrapS == GL_CLAMP) {
+ /* Not exactly what the spec says, but it matches NVIDIA output */
+ fcol = CLAMP(texcoords[i][0] - 0.5F, 0.0, width_minus_1);
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ }
+ else if (tObj->WrapS == GL_CLAMP_TO_EDGE) {
+ fcol = CLAMP(texcoords[i][0], 0.5F, width - 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ if (i1 > width_minus_1)
+ i1 = width_minus_1;
+ }
+ else {
+ ASSERT(tObj->WrapS == GL_CLAMP_TO_BORDER);
+ fcol = CLAMP(texcoords[i][0], -0.5F, width + 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ }
+
+ if (tObj->WrapT == GL_CLAMP) {
+ /* Not exactly what the spec says, but it matches NVIDIA output */
+ frow = CLAMP(texcoords[i][1] - 0.5F, 0.0, width_minus_1);
+ j0 = IFLOOR(frow);
+ j1 = j0 + 1;
+ }
+ else if (tObj->WrapT == GL_CLAMP_TO_EDGE) {
+ frow = CLAMP(texcoords[i][1], 0.5F, height - 0.5F);
+ frow -= 0.5F;
+ j0 = IFLOOR(frow);
+ j1 = j0 + 1;
+ if (j1 > height_minus_1)
+ j1 = height_minus_1;
+ }
+ else {
+ ASSERT(tObj->WrapT == GL_CLAMP_TO_BORDER);
+ frow = CLAMP(texcoords[i][1], -0.5F, height + 0.5F);
+ frow -= 0.5F;
+ j0 = IFLOOR(frow);
+ j1 = j0 + 1;
+ }
+
+ /* compute integer rows/columns */
+ if (i0 < 0 || i0 > width_minus_1) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 > width_minus_1) useBorderColor |= I1BIT;
+ if (j0 < 0 || j0 > height_minus_1) useBorderColor |= J0BIT;
+ if (j1 < 0 || j1 > height_minus_1) useBorderColor |= J1BIT;
+
+ /* get four texel samples */
+ if (useBorderColor & (I0BIT | J0BIT))
+ COPY_CHAN4(t00, tObj->_BorderChan);
+ else
+ img->FetchTexelc(img, i0, j0, 0, t00);
+
+ if (useBorderColor & (I1BIT | J0BIT))
+ COPY_CHAN4(t10, tObj->_BorderChan);
+ else
+ img->FetchTexelc(img, i1, j0, 0, t10);
+
+ if (useBorderColor & (I0BIT | J1BIT))
+ COPY_CHAN4(t01, tObj->_BorderChan);
+ else
+ img->FetchTexelc(img, i0, j1, 0, t01);
+
+ if (useBorderColor & (I1BIT | J1BIT))
+ COPY_CHAN4(t11, tObj->_BorderChan);
+ else
+ img->FetchTexelc(img, i1, j1, 0, t11);
+
+ /* compute interpolants */
+ a = FRAC(fcol);
+ b = FRAC(frow);
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ ia = IROUND_POS(a * ILERP_SCALE);
+ ib = IROUND_POS(b * ILERP_SCALE);
+#endif
+
+ /* do bilinear interpolation of texel colors */
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]);
+ rgba[i][1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]);
+ rgba[i][2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]);
+ rgba[i][3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]);
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ rgba[i][0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5);
+ rgba[i][1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5);
+ rgba[i][2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5);
+ rgba[i][3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5);
+#else
+ ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE);
+ rgba[i][0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]);
+ rgba[i][1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]);
+ rgba[i][2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]);
+ rgba[i][3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]);
+#endif
+ }
+}
+
+
+static void
+sample_lambda_rect( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan 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(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit],
+ n, lambda, &minStart, &minEnd, &magStart, &magEnd);
+
+ if (minStart < minEnd) {
+ if (tObj->MinFilter == GL_NEAREST) {
+ sample_nearest_rect( ctx, texUnit, tObj, minEnd - minStart,
+ texcoords + minStart, NULL, rgba + minStart);
+ }
+ else {
+ sample_linear_rect( ctx, texUnit, tObj, minEnd - minStart,
+ texcoords + minStart, NULL, rgba + minStart);
+ }
+ }
+ if (magStart < magEnd) {
+ if (tObj->MagFilter == GL_NEAREST) {
+ sample_nearest_rect( ctx, texUnit, tObj, magEnd - magStart,
+ texcoords + magStart, NULL, rgba + magStart);
+ }
+ else {
+ sample_linear_rect( ctx, texUnit, tObj, magEnd - magStart,
+ texcoords + magStart, NULL, rgba + magStart);
+ }
+ }
+}
+
+
+
+/*
+ * Sample a shadow/depth texture.
+ */
+static void
+sample_depth_texture( GLcontext *ctx, GLuint unit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan texel[][4] )
+{
+ const GLint baseLevel = tObj->BaseLevel;
+ const struct gl_texture_image *texImage = tObj->Image[0][baseLevel];
+ const GLuint width = texImage->Width;
+ const GLuint height = texImage->Height;
+ GLchan ambient;
+ GLenum function;
+ GLchan result;
+
+ (void) lambda;
+ (void) unit;
+
+ ASSERT(tObj->Image[0][tObj->BaseLevel]->Format == GL_DEPTH_COMPONENT);
+ ASSERT(tObj->Target == GL_TEXTURE_1D ||
+ tObj->Target == GL_TEXTURE_2D ||
+ tObj->Target == GL_TEXTURE_RECTANGLE_NV);
+
+ UNCLAMPED_FLOAT_TO_CHAN(ambient, tObj->ShadowAmbient);
+
+ /* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */
+
+ /* XXX this could be precomputed and saved in the texture object */
+ if (tObj->CompareFlag) {
+ /* GL_SGIX_shadow */
+ if (tObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) {
+ function = GL_LEQUAL;
+ }
+ else {
+ ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX);
+ function = GL_GEQUAL;
+ }
+ }
+ else if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
+ /* GL_ARB_shadow */
+ function = tObj->CompareFunc;
+ }
+ else {
+ function = GL_NONE; /* pass depth through as grayscale */
+ }
+
+ if (tObj->MagFilter == GL_NEAREST) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLfloat depthSample;
+ GLint col, row;
+ /* XXX fix for texture rectangle! */
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0], width, col);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoords[i][1], height, row);
+ texImage->FetchTexelf(texImage, col, row, 0, &depthSample);
+
+ switch (function) {
+ case GL_LEQUAL:
+ result = (texcoords[i][2] <= depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_GEQUAL:
+ result = (texcoords[i][2] >= depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_LESS:
+ result = (texcoords[i][2] < depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_GREATER:
+ result = (texcoords[i][2] > depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_EQUAL:
+ result = (texcoords[i][2] == depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_NOTEQUAL:
+ result = (texcoords[i][2] != depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_ALWAYS:
+ result = CHAN_MAX;
+ break;
+ case GL_NEVER:
+ result = ambient;
+ break;
+ case GL_NONE:
+ CLAMPED_FLOAT_TO_CHAN(result, depthSample);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad compare func in sample_depth_texture");
+ return;
+ }
+
+ switch (tObj->DepthMode) {
+ case GL_LUMINANCE:
+ texel[i][RCOMP] = result;
+ texel[i][GCOMP] = result;
+ texel[i][BCOMP] = result;
+ texel[i][ACOMP] = CHAN_MAX;
+ break;
+ case GL_INTENSITY:
+ texel[i][RCOMP] = result;
+ texel[i][GCOMP] = result;
+ texel[i][BCOMP] = result;
+ texel[i][ACOMP] = result;
+ break;
+ case GL_ALPHA:
+ texel[i][RCOMP] = 0;
+ texel[i][GCOMP] = 0;
+ texel[i][BCOMP] = 0;
+ texel[i][ACOMP] = 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;
+ GLfloat u, v;
+ GLuint useBorderTexel;
+
+ /* XXX fix for texture rectangle! */
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoords[i][0], u, width, i0, i1);
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoords[i][1], v, height,j0, j1);
+
+ useBorderTexel = 0;
+ if (texImage->Border) {
+ i0 += texImage->Border;
+ i1 += texImage->Border;
+ j0 += texImage->Border;
+ j1 += texImage->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;
+ }
+
+ /* get four depth samples from the texture */
+ if (useBorderTexel & (I0BIT | J0BIT)) {
+ depth00 = 1.0;
+ }
+ else {
+ texImage->FetchTexelf(texImage, i0, j0, 0, &depth00);
+ }
+ if (useBorderTexel & (I1BIT | J0BIT)) {
+ depth10 = 1.0;
+ }
+ else {
+ texImage->FetchTexelf(texImage, i1, j0, 0, &depth10);
+ }
+ if (useBorderTexel & (I0BIT | J1BIT)) {
+ depth01 = 1.0;
+ }
+ else {
+ texImage->FetchTexelf(texImage, i0, j1, 0, &depth01);
+ }
+ if (useBorderTexel & (I1BIT | J1BIT)) {
+ depth11 = 1.0;
+ }
+ else {
+ texImage->FetchTexelf(texImage, i1, j1, 0, &depth11);
+ }
+
+ if (0) {
+ /* compute a single weighted depth sample and do one comparison */
+ const GLfloat a = FRAC(u + 1.0F);
+ const GLfloat b = FRAC(v + 1.0F);
+ const GLfloat depthSample
+ = lerp_2d(a, b, depth00, depth10, depth01, depth11);
+ if ((depthSample <= texcoords[i][2] && function == GL_LEQUAL) ||
+ (depthSample >= texcoords[i][2] && function == GL_GEQUAL)) {
+ result = ambient;
+ }
+ else {
+ result = CHAN_MAX;
+ }
+ }
+ else {
+ /* Do four depth/R comparisons and compute a weighted result.
+ * If this touches on somebody's I.P., I'll remove this code
+ * upon request.
+ */
+ const GLfloat d = (CHAN_MAXF - (GLfloat) ambient) * 0.25F;
+ GLfloat luminance = CHAN_MAXF;
+
+ switch (function) {
+ case GL_LEQUAL:
+ if (depth00 <= texcoords[i][2]) luminance -= d;
+ if (depth01 <= texcoords[i][2]) luminance -= d;
+ if (depth10 <= texcoords[i][2]) luminance -= d;
+ if (depth11 <= texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_GEQUAL:
+ if (depth00 >= texcoords[i][2]) luminance -= d;
+ if (depth01 >= texcoords[i][2]) luminance -= d;
+ if (depth10 >= texcoords[i][2]) luminance -= d;
+ if (depth11 >= texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_LESS:
+ if (depth00 < texcoords[i][2]) luminance -= d;
+ if (depth01 < texcoords[i][2]) luminance -= d;
+ if (depth10 < texcoords[i][2]) luminance -= d;
+ if (depth11 < texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_GREATER:
+ if (depth00 > texcoords[i][2]) luminance -= d;
+ if (depth01 > texcoords[i][2]) luminance -= d;
+ if (depth10 > texcoords[i][2]) luminance -= d;
+ if (depth11 > texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_EQUAL:
+ if (depth00 == texcoords[i][2]) luminance -= d;
+ if (depth01 == texcoords[i][2]) luminance -= d;
+ if (depth10 == texcoords[i][2]) luminance -= d;
+ if (depth11 == texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_NOTEQUAL:
+ if (depth00 != texcoords[i][2]) luminance -= d;
+ if (depth01 != texcoords[i][2]) luminance -= d;
+ if (depth10 != texcoords[i][2]) luminance -= d;
+ if (depth11 != texcoords[i][2]) luminance -= d;
+ result = (GLchan) luminance;
+ break;
+ case GL_ALWAYS:
+ result = 0;
+ break;
+ case GL_NEVER:
+ result = CHAN_MAX;
+ break;
+ case GL_NONE:
+ /* ordinary bilinear filtering */
+ {
+ const GLfloat a = FRAC(u + 1.0F);
+ const GLfloat b = FRAC(v + 1.0F);
+ const GLfloat depthSample
+ = lerp_2d(a, b, depth00, depth10, depth01, depth11);
+ CLAMPED_FLOAT_TO_CHAN(result, depthSample);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad compare func in sample_depth_texture");
+ return;
+ }
+ }
+
+ switch (tObj->DepthMode) {
+ case GL_LUMINANCE:
+ texel[i][RCOMP] = result;
+ texel[i][GCOMP] = result;
+ texel[i][BCOMP] = result;
+ texel[i][ACOMP] = CHAN_MAX;
+ break;
+ case GL_INTENSITY:
+ texel[i][RCOMP] = result;
+ texel[i][GCOMP] = result;
+ texel[i][BCOMP] = result;
+ texel[i][ACOMP] = result;
+ break;
+ case GL_ALPHA:
+ texel[i][RCOMP] = 0;
+ texel[i][GCOMP] = 0;
+ texel[i][BCOMP] = 0;
+ texel[i][ACOMP] = result;
+ break;
+ default:
+ _mesa_problem(ctx, "Bad depth texture mode");
+ }
+ } /* for */
+ } /* if filter */
+}
+
+
+#if 0
+/*
+ * Experimental depth texture sampling function.
+ */
+static void
+sample_depth_texture2(const GLcontext *ctx,
+ const struct gl_texture_unit *texUnit,
+ GLuint n, const GLfloat texcoords[][4],
+ GLchan texel[][4])
+{
+ const struct gl_texture_object *texObj = texUnit->_Current;
+ const GLint baseLevel = texObj->BaseLevel;
+ const struct gl_texture_image *texImage = texObj->Image[0][baseLevel];
+ const GLuint width = texImage->Width;
+ const GLuint height = texImage->Height;
+ GLchan ambient;
+ GLboolean lequal, gequal;
+
+ if (texObj->Target != GL_TEXTURE_2D) {
+ _mesa_problem(ctx, "only 2-D depth textures supported at this time");
+ return;
+ }
+
+ if (texObj->MinFilter != texObj->MagFilter) {
+ _mesa_problem(ctx, "mipmapped depth textures not supported at this time");
+ return;
+ }
+
+ /* XXX the GL_SGIX_shadow extension spec doesn't say what to do if
+ * GL_TEXTURE_COMPARE_SGIX == GL_TRUE but the current texture object
+ * isn't a depth texture.
+ */
+ if (texImage->Format != GL_DEPTH_COMPONENT) {
+ _mesa_problem(ctx,"GL_TEXTURE_COMPARE_SGIX enabled with non-depth texture");
+ return;
+ }
+
+ UNCLAMPED_FLOAT_TO_CHAN(ambient, tObj->ShadowAmbient);
+
+ if (texObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) {
+ lequal = GL_TRUE;
+ gequal = GL_FALSE;
+ }
+ else {
+ lequal = GL_FALSE;
+ gequal = GL_TRUE;
+ }
+
+ {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ const GLint K = 3;
+ GLint col, row, ii, jj, imin, imax, jmin, jmax, samples, count;
+ GLfloat w;
+ GLchan lum;
+ COMPUTE_NEAREST_TEXEL_LOCATION(texObj->WrapS, texcoords[i][0],
+ width, col);
+ COMPUTE_NEAREST_TEXEL_LOCATION(texObj->WrapT, texcoords[i][1],
+ height, row);
+
+ imin = col - K;
+ imax = col + K;
+ jmin = row - K;
+ jmax = row + K;
+
+ if (imin < 0) imin = 0;
+ if (imax >= width) imax = width - 1;
+ if (jmin < 0) jmin = 0;
+ if (jmax >= height) jmax = height - 1;
+
+ samples = (imax - imin + 1) * (jmax - jmin + 1);
+ count = 0;
+ for (jj = jmin; jj <= jmax; jj++) {
+ for (ii = imin; ii <= imax; ii++) {
+ GLfloat depthSample;
+ texImage->FetchTexelf(texImage, ii, jj, 0, &depthSample);
+ if ((depthSample <= r[i] && lequal) ||
+ (depthSample >= r[i] && gequal)) {
+ count++;
+ }
+ }
+ }
+
+ w = (GLfloat) count / (GLfloat) samples;
+ w = CHAN_MAXF - w * (CHAN_MAXF - (GLfloat) ambient);
+ lum = (GLint) w;
+
+ texel[i][RCOMP] = lum;
+ texel[i][GCOMP] = lum;
+ texel[i][BCOMP] = lum;
+ texel[i][ACOMP] = CHAN_MAX;
+ }
+ }
+}
+#endif
+
+
+/**
+ * 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 programss don't observe the texture enable/disable flags.
+ */
+static void
+null_sample_func( GLcontext *ctx, GLuint texUnit,
+ const struct gl_texture_object *tObj, GLuint n,
+ const GLfloat texcoords[][4], const GLfloat lambda[],
+ GLchan rgba[][4])
+{
+ GLuint i;
+ (void) ctx;
+ (void) texUnit;
+ (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] = CHAN_MAX;
+ }
+}
+
+
+/**
+ * Setup the texture sampling function for this 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]->Format;
+
+ switch (t->Target) {
+ case GL_TEXTURE_1D:
+ if (format == GL_DEPTH_COMPONENT) {
+ 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) {
+ return &sample_depth_texture;
+ }
+ else if (needLambda) {
+ return &sample_lambda_2d;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_2d;
+ }
+ else {
+ GLint baseLevel = t->BaseLevel;
+ ASSERT(t->MinFilter == GL_NEAREST);
+ if (t->WrapS == GL_REPEAT &&
+ t->WrapT == GL_REPEAT &&
+ t->_IsPowerOfTwo &&
+ t->Image[0][baseLevel]->Border == 0 &&
+ t->Image[0][baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGB) {
+ return &opt_sample_rgb_2d;
+ }
+ else if (t->WrapS == GL_REPEAT &&
+ t->WrapT == GL_REPEAT &&
+ t->_IsPowerOfTwo &&
+ t->Image[0][baseLevel]->Border == 0 &&
+ t->Image[0][baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGBA) {
+ 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 (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;
+ }
+ default:
+ _mesa_problem(ctx,
+ "invalid target in _swrast_choose_texture_sample_func");
+ return &null_sample_func;
+ }
+ }
+}
+
+
+#define PROD(A,B) ( (GLuint)(A) * ((GLuint)(B)+1) )
+#define S_PROD(A,B) ( (GLint)(A) * ((GLint)(B)+1) )
+
+
+/**
+ * Do texture application for GL_ARB/EXT_texture_env_combine.
+ * This function also supports GL_{EXT,ARB}_texture_env_dot3 and
+ * GL_ATI_texture_env_combine3. Since "classic" texture environments are
+ * implemented using GL_ARB_texture_env_combine-like state, this same function
+ * is used for classic texture environment application as well.
+ *
+ * \param ctx rendering context
+ * \param textureUnit the texture unit to apply
+ * \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 colors, which get modified here
+ */
+static INLINE void
+texture_combine( const GLcontext *ctx, GLuint unit, GLuint n,
+ CONST GLchan (*primary_rgba)[4],
+ CONST GLchan *texelBuffer,
+ GLchan (*rgba)[4] )
+{
+ const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]);
+ const GLchan (*argRGB [3])[4];
+ const GLchan (*argA [3])[4];
+ const GLuint RGBshift = textureUnit->_CurrentCombine->ScaleShiftRGB;
+ const GLuint Ashift = textureUnit->_CurrentCombine->ScaleShiftA;
+#if CHAN_TYPE == GL_FLOAT
+ const GLchan RGBmult = (GLfloat) (1 << RGBshift);
+ const GLchan Amult = (GLfloat) (1 << Ashift);
+ static const GLchan one[4] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLchan zero[4] = { 0.0, 0.0, 0.0, 0.0 };
+#else
+ const GLint half = (CHAN_MAX + 1) / 2;
+ static const GLchan one[4] = { CHAN_MAX, CHAN_MAX, CHAN_MAX, CHAN_MAX };
+ static const GLchan zero[4] = { 0, 0, 0, 0 };
+#endif
+ GLuint i, j;
+ GLuint numColorArgs;
+ GLuint numAlphaArgs;
+
+ /* GLchan ccolor[3][4]; */
+ DEFMNARRAY(GLchan, ccolor, 3, 3 * MAX_WIDTH, 4); /* mac 32k limitation */
+ CHECKARRAY(ccolor, return); /* mac 32k limitation */
+
+ ASSERT(ctx->Extensions.EXT_texture_env_combine ||
+ ctx->Extensions.ARB_texture_env_combine);
+ ASSERT(SWRAST_CONTEXT(ctx)->_AnyTextureCombine);
+
+
+ /*
+ printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n",
+ textureUnit->_CurrentCombine->ModeRGB,
+ textureUnit->_CurrentCombine->ModeA,
+ textureUnit->_CurrentCombine->SourceRGB[0],
+ textureUnit->_CurrentCombine->SourceA[0],
+ textureUnit->_CurrentCombine->SourceRGB[1],
+ textureUnit->_CurrentCombine->SourceA[1]);
+ */
+
+ /*
+ * Do operand setup for up to 3 operands. Loop over the terms.
+ */
+ numColorArgs = textureUnit->_CurrentCombine->_NumArgsRGB;
+ numAlphaArgs = textureUnit->_CurrentCombine->_NumArgsA;
+
+ for (j = 0; j < numColorArgs; j++) {
+ const GLenum srcRGB = textureUnit->_CurrentCombine->SourceRGB[j];
+
+
+ switch (srcRGB) {
+ case GL_TEXTURE:
+ argRGB[j] = (const GLchan (*)[4])
+ (texelBuffer + unit * (n * 4 * sizeof(GLchan)));
+ break;
+ case GL_PRIMARY_COLOR:
+ argRGB[j] = primary_rgba;
+ break;
+ case GL_PREVIOUS:
+ argRGB[j] = (const GLchan (*)[4]) rgba;
+ break;
+ case GL_CONSTANT:
+ {
+ GLchan (*c)[4] = ccolor[j];
+ GLchan red, green, blue, alpha;
+ UNCLAMPED_FLOAT_TO_CHAN(red, textureUnit->EnvColor[0]);
+ UNCLAMPED_FLOAT_TO_CHAN(green, textureUnit->EnvColor[1]);
+ UNCLAMPED_FLOAT_TO_CHAN(blue, textureUnit->EnvColor[2]);
+ UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]);
+ for (i = 0; i < n; i++) {
+ c[i][RCOMP] = red;
+ c[i][GCOMP] = green;
+ c[i][BCOMP] = blue;
+ c[i][ACOMP] = alpha;
+ }
+ argRGB[j] = (const GLchan (*)[4]) ccolor[j];
+ }
+ break;
+ /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
+ */
+ case GL_ZERO:
+ argRGB[j] = & zero;
+ break;
+ case GL_ONE:
+ argRGB[j] = & one;
+ 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[j] = (const GLchan (*)[4])
+ (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan)));
+ }
+ }
+
+ if (textureUnit->_CurrentCombine->OperandRGB[j] != GL_SRC_COLOR) {
+ const GLchan (*src)[4] = argRGB[j];
+ GLchan (*dst)[4] = ccolor[j];
+
+ /* point to new arg[j] storage */
+ argRGB[j] = (const GLchan (*)[4]) ccolor[j];
+
+ if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_ONE_MINUS_SRC_COLOR) {
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] = CHAN_MAX - src[i][RCOMP];
+ dst[i][GCOMP] = CHAN_MAX - src[i][GCOMP];
+ dst[i][BCOMP] = CHAN_MAX - src[i][BCOMP];
+ }
+ }
+ else if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_SRC_ALPHA) {
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] = src[i][ACOMP];
+ dst[i][GCOMP] = src[i][ACOMP];
+ dst[i][BCOMP] = src[i][ACOMP];
+ }
+ }
+ else {
+ ASSERT(textureUnit->_CurrentCombine->OperandRGB[j] ==GL_ONE_MINUS_SRC_ALPHA);
+ for (i = 0; i < n; i++) {
+ dst[i][RCOMP] = CHAN_MAX - src[i][ACOMP];
+ dst[i][GCOMP] = CHAN_MAX - src[i][ACOMP];
+ dst[i][BCOMP] = CHAN_MAX - src[i][ACOMP];
+ }
+ }
+ }
+ }
+
+
+ for (j = 0; j < numAlphaArgs; j++) {
+ const GLenum srcA = textureUnit->_CurrentCombine->SourceA[j];
+
+ switch (srcA) {
+ case GL_TEXTURE:
+ argA[j] = (const GLchan (*)[4])
+ (texelBuffer + unit * (n * 4 * sizeof(GLchan)));
+ break;
+ case GL_PRIMARY_COLOR:
+ argA[j] = primary_rgba;
+ break;
+ case GL_PREVIOUS:
+ argA[j] = (const GLchan (*)[4]) rgba;
+ break;
+ case GL_CONSTANT:
+ {
+ GLchan alpha, (*c)[4] = ccolor[j];
+ UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]);
+ for (i = 0; i < n; i++)
+ c[i][ACOMP] = alpha;
+ argA[j] = (const GLchan (*)[4]) ccolor[j];
+ }
+ break;
+ /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
+ */
+ case GL_ZERO:
+ argA[j] = & zero;
+ break;
+ case GL_ONE:
+ argA[j] = & one;
+ 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[j] = (const GLchan (*)[4])
+ (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan)));
+ }
+ }
+
+ if (textureUnit->_CurrentCombine->OperandA[j] == GL_ONE_MINUS_SRC_ALPHA) {
+ const GLchan (*src)[4] = argA[j];
+ GLchan (*dst)[4] = ccolor[j];
+ argA[j] = (const GLchan (*)[4]) ccolor[j];
+ for (i = 0; i < n; i++) {
+ dst[i][ACOMP] = CHAN_MAX - src[i][ACOMP];
+ }
+ }
+ }
+
+ /*
+ * Do the texture combine.
+ */
+ switch (textureUnit->_CurrentCombine->ModeRGB) {
+ case GL_REPLACE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ if (RGBshift) {
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = arg0[i][RCOMP] * RGBmult;
+ rgba[i][GCOMP] = arg0[i][GCOMP] * RGBmult;
+ rgba[i][BCOMP] = arg0[i][BCOMP] * RGBmult;
+#else
+ GLuint r = (GLuint) arg0[i][RCOMP] << RGBshift;
+ GLuint g = (GLuint) arg0[i][GCOMP] << RGBshift;
+ GLuint b = (GLuint) arg0[i][BCOMP] << RGBshift;
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = arg0[i][RCOMP];
+ rgba[i][GCOMP] = arg0[i][GCOMP];
+ rgba[i][BCOMP] = arg0[i][BCOMP];
+ }
+ }
+ }
+ break;
+ case GL_MODULATE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - RGBshift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * RGBmult;
+ rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * RGBmult;
+ rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * RGBmult;
+#else
+ GLuint r = PROD(arg0[i][RCOMP], arg1[i][RCOMP]) >> shift;
+ GLuint g = PROD(arg0[i][GCOMP], arg1[i][GCOMP]) >> shift;
+ GLuint b = PROD(arg0[i][BCOMP], arg1[i][BCOMP]) >> shift;
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_ADD:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * RGBmult;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * RGBmult;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * RGBmult;
+#else
+ GLint r = ((GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP]) << RGBshift;
+ GLint g = ((GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP]) << RGBshift;
+ GLint b = ((GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP]) << RGBshift;
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_ADD_SIGNED:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5) * RGBmult;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5) * RGBmult;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5) * RGBmult;
+#else
+ GLint r = (GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP] -half;
+ GLint g = (GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP] -half;
+ GLint b = (GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP] -half;
+ r = (r < 0) ? 0 : r << RGBshift;
+ g = (g < 0) ? 0 : g << RGBshift;
+ b = (b < 0) ? 0 : b << RGBshift;
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_INTERPOLATE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - RGBshift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] +
+ arg1[i][RCOMP] * (CHAN_MAXF - arg2[i][RCOMP])) * RGBmult;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] +
+ arg1[i][GCOMP] * (CHAN_MAXF - arg2[i][GCOMP])) * RGBmult;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] +
+ arg1[i][BCOMP] * (CHAN_MAXF - arg2[i][BCOMP])) * RGBmult;
+#else
+ GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP])
+ + PROD(arg1[i][RCOMP], CHAN_MAX - arg2[i][RCOMP]))
+ >> shift;
+ GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP])
+ + PROD(arg1[i][GCOMP], CHAN_MAX - arg2[i][GCOMP]))
+ >> shift;
+ GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP])
+ + PROD(arg1[i][BCOMP], CHAN_MAX - arg2[i][BCOMP]))
+ >> shift;
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_SUBTRACT:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * RGBmult;
+ rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * RGBmult;
+ rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * RGBmult;
+#else
+ GLint r = ((GLint) arg0[i][RCOMP] - (GLint) arg1[i][RCOMP]) << RGBshift;
+ GLint g = ((GLint) arg0[i][GCOMP] - (GLint) arg1[i][GCOMP]) << RGBshift;
+ GLint b = ((GLint) arg0[i][BCOMP] - (GLint) arg1[i][BCOMP]) << RGBshift;
+ rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_DOT3_RGB_EXT:
+ case GL_DOT3_RGBA_EXT:
+ {
+ /* Do not scale the result by 1 2 or 4 */
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ GLchan 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, CHAN_MAXF);
+#else
+ GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half,
+ (GLint)arg1[i][RCOMP] - half) +
+ S_PROD((GLint)arg0[i][GCOMP] - half,
+ (GLint)arg1[i][GCOMP] - half) +
+ S_PROD((GLint)arg0[i][BCOMP] - half,
+ (GLint)arg1[i][BCOMP] - half)) >> 6;
+ dot = CLAMP(dot, 0, CHAN_MAX);
+#endif
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot;
+ }
+ }
+ break;
+ case GL_DOT3_RGB:
+ case GL_DOT3_RGBA:
+ {
+ /* DO scale the result by 1 2 or 4 */
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ GLchan 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 * RGBmult;
+ dot = CLAMP(dot, 0.0, CHAN_MAXF);
+#else
+ GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half,
+ (GLint)arg1[i][RCOMP] - half) +
+ S_PROD((GLint)arg0[i][GCOMP] - half,
+ (GLint)arg1[i][GCOMP] - half) +
+ S_PROD((GLint)arg0[i][BCOMP] - half,
+ (GLint)arg1[i][BCOMP] - half)) >> 6;
+ dot <<= RGBshift;
+ dot = CLAMP(dot, 0, CHAN_MAX);
+#endif
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot;
+ }
+ }
+ break;
+ case GL_MODULATE_ADD_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - RGBshift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP]) * RGBmult;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP]) * RGBmult;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP]) * RGBmult;
+#else
+ GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP])
+ + ((GLuint) arg1[i][RCOMP] << CHAN_BITS)) >> shift;
+ GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP])
+ + ((GLuint) arg1[i][GCOMP] << CHAN_BITS)) >> shift;
+ GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP])
+ + ((GLuint) arg1[i][BCOMP] << CHAN_BITS)) >> shift;
+ rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_MODULATE_SIGNED_ADD_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - RGBshift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP] - 0.5) * RGBmult;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP] - 0.5) * RGBmult;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP] - 0.5) * RGBmult;
+#else
+ GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP])
+ + (((GLint) arg1[i][RCOMP] - half) << CHAN_BITS))
+ >> shift;
+ GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP])
+ + (((GLint) arg1[i][GCOMP] - half) << CHAN_BITS))
+ >> shift;
+ GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP])
+ + (((GLint) arg1[i][BCOMP] - half) << CHAN_BITS))
+ >> shift;
+ rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_MODULATE_SUBTRACT_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - RGBshift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) - arg1[i][RCOMP]) * RGBmult;
+ rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) - arg1[i][GCOMP]) * RGBmult;
+ rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) - arg1[i][BCOMP]) * RGBmult;
+#else
+ GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP])
+ - ((GLint) arg1[i][RCOMP] << CHAN_BITS))
+ >> shift;
+ GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP])
+ - ((GLint) arg1[i][GCOMP] << CHAN_BITS))
+ >> shift;
+ GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP])
+ - ((GLint) arg1[i][BCOMP] << CHAN_BITS))
+ >> shift;
+ rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX);
+ rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX);
+ rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "invalid combine mode");
+ }
+
+ switch (textureUnit->_CurrentCombine->ModeA) {
+ case GL_REPLACE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ if (Ashift) {
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ GLchan a = arg0[i][ACOMP] * Amult;
+#else
+ GLuint a = (GLuint) arg0[i][ACOMP] << Ashift;
+#endif
+ rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX);
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = arg0[i][ACOMP];
+ }
+ }
+ }
+ break;
+ case GL_MODULATE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - Ashift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * Amult;
+#else
+ GLuint a = (PROD(arg0[i][ACOMP], arg1[i][ACOMP]) >> shift);
+ rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_ADD:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * Amult;
+#else
+ GLint a = ((GLint) arg0[i][ACOMP] + arg1[i][ACOMP]) << Ashift;
+ rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_ADD_SIGNED:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * Amult;
+#else
+ GLint a = (GLint) arg0[i][ACOMP] + (GLint) arg1[i][ACOMP] -half;
+ a = (a < 0) ? 0 : a << Ashift;
+ rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_INTERPOLATE:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - Ashift;
+#endif
+ for (i=0; i<n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] +
+ arg1[i][ACOMP] * (CHAN_MAXF - arg2[i][ACOMP]))
+ * Amult;
+#else
+ GLuint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP])
+ + PROD(arg1[i][ACOMP], CHAN_MAX - arg2[i][ACOMP]))
+ >> shift;
+ rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_SUBTRACT:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * Amult;
+#else
+ GLint a = ((GLint) arg0[i][ACOMP] - (GLint) arg1[i][ACOMP]) << Ashift;
+ rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_MODULATE_ADD_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - Ashift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP]) * Amult;
+#else
+ GLint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP])
+ + ((GLuint) arg1[i][ACOMP] << CHAN_BITS))
+ >> shift;
+ rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_MODULATE_SIGNED_ADD_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - Ashift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP] - 0.5F) * Amult;
+#else
+ GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP])
+ + (((GLint) arg1[i][ACOMP] - half) << CHAN_BITS))
+ >> shift;
+ rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
+#endif
+ }
+ }
+ break;
+ case GL_MODULATE_SUBTRACT_ATI:
+ {
+ const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0];
+ const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1];
+ const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2];
+#if CHAN_TYPE != GL_FLOAT
+ const GLint shift = CHAN_BITS - Ashift;
+#endif
+ for (i = 0; i < n; i++) {
+#if CHAN_TYPE == GL_FLOAT
+ rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - arg1[i][ACOMP]) * Amult;
+#else
+ GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP])
+ - ((GLint) arg1[i][ACOMP] << CHAN_BITS))
+ >> shift;
+ rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
+#endif
+ }
+ }
+ 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 (textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT ||
+ textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) {
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = rgba[i][RCOMP];
+ }
+ }
+ UNDEFARRAY(ccolor); /* mac 32k limitation */
+}
+#undef PROD
+
+
+/**
+ * Apply a conventional OpenGL texture env mode (REPLACE, ADD, BLEND,
+ * MODULATE, or DECAL) to an array of fragments.
+ * Input: textureUnit - pointer to texture unit to apply
+ * format - base internal texture format
+ * n - number of fragments
+ * primary_rgba - primary colors (may alias rgba for single texture)
+ * texels - array of texel colors
+ * InOut: rgba - incoming fragment colors modified by texel colors
+ * according to the texture environment mode.
+ */
+static void
+texture_apply( const GLcontext *ctx,
+ const struct gl_texture_unit *texUnit,
+ GLuint n,
+ CONST GLchan primary_rgba[][4], CONST GLchan texel[][4],
+ GLchan rgba[][4] )
+{
+ GLint baseLevel;
+ GLuint i;
+ GLint Rc, Gc, Bc, Ac;
+ GLenum format;
+ (void) primary_rgba;
+
+ ASSERT(texUnit);
+ ASSERT(texUnit->_Current);
+
+ baseLevel = texUnit->_Current->BaseLevel;
+ ASSERT(texUnit->_Current->Image[0][baseLevel]);
+
+ format = texUnit->_Current->Image[0][baseLevel]->Format;
+
+ if (format == GL_COLOR_INDEX || format == GL_YCBCR_MESA) {
+ format = GL_RGBA; /* a bit of a hack */
+ }
+ else if (format == GL_DEPTH_COMPONENT) {
+ format = texUnit->_Current->DepthMode;
+ }
+
+ switch (texUnit->EnvMode) {
+ case GL_REPLACE:
+ switch (format) {
+ case GL_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf */
+ /* Av = At */
+ rgba[i][ACOMP] = texel[i][ACOMP];
+ }
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++) {
+ /* Cv = Lt */
+ GLchan Lt = texel[i][RCOMP];
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt;
+ /* Av = Af */
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ GLchan Lt = texel[i][RCOMP];
+ /* Cv = Lt */
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt;
+ /* Av = At */
+ rgba[i][ACOMP] = texel[i][ACOMP];
+ }
+ break;
+ case GL_INTENSITY:
+ for (i=0;i<n;i++) {
+ /* Cv = It */
+ GLchan It = texel[i][RCOMP];
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = It;
+ /* Av = It */
+ rgba[i][ACOMP] = It;
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ /* Cv = Ct */
+ rgba[i][RCOMP] = texel[i][RCOMP];
+ rgba[i][GCOMP] = texel[i][GCOMP];
+ rgba[i][BCOMP] = texel[i][BCOMP];
+ /* Av = Af */
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ /* Cv = Ct */
+ rgba[i][RCOMP] = texel[i][RCOMP];
+ rgba[i][GCOMP] = texel[i][GCOMP];
+ rgba[i][BCOMP] = texel[i][BCOMP];
+ /* Av = At */
+ rgba[i][ACOMP] = texel[i][ACOMP];
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format (GL_REPLACE) in texture_apply");
+ return;
+ }
+ break;
+
+ case GL_MODULATE:
+ switch (format) {
+ case GL_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf */
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] );
+ }
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++) {
+ /* Cv = LtCf */
+ GLchan Lt = texel[i][RCOMP];
+ rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt );
+ rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt );
+ rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt );
+ /* Av = Af */
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Cv = CfLt */
+ GLchan Lt = texel[i][RCOMP];
+ rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt );
+ rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt );
+ rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt );
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] );
+ }
+ break;
+ case GL_INTENSITY:
+ for (i=0;i<n;i++) {
+ /* Cv = CfIt */
+ GLchan It = texel[i][RCOMP];
+ rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], It );
+ rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], It );
+ rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], It );
+ /* Av = AfIt */
+ rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], It );
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ /* Cv = CfCt */
+ rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] );
+ rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] );
+ rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] );
+ /* Av = Af */
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ /* Cv = CfCt */
+ rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] );
+ rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] );
+ rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] );
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] );
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format (GL_MODULATE) in texture_apply");
+ return;
+ }
+ break;
+
+ case GL_DECAL:
+ switch (format) {
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_INTENSITY:
+ /* undefined */
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ /* Cv = Ct */
+ rgba[i][RCOMP] = texel[i][RCOMP];
+ rgba[i][GCOMP] = texel[i][GCOMP];
+ rgba[i][BCOMP] = texel[i][BCOMP];
+ /* Av = Af */
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-At) + CtAt */
+ GLint t = texel[i][ACOMP], s = CHAN_MAX - t;
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(texel[i][RCOMP],t);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(texel[i][GCOMP],t);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(texel[i][BCOMP],t);
+ /* Av = Af */
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format (GL_DECAL) in texture_apply");
+ return;
+ }
+ break;
+
+ case GL_BLEND:
+ Rc = (GLint) (texUnit->EnvColor[0] * CHAN_MAXF);
+ Gc = (GLint) (texUnit->EnvColor[1] * CHAN_MAXF);
+ Bc = (GLint) (texUnit->EnvColor[2] * CHAN_MAXF);
+ Ac = (GLint) (texUnit->EnvColor[3] * CHAN_MAXF);
+ switch (format) {
+ case GL_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf */
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]);
+ }
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-Lt) + CcLt */
+ GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt;
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt);
+ /* Av = Af */
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-Lt) + CcLt */
+ GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt;
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt);
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]);
+ }
+ break;
+ case GL_INTENSITY:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-It) + CcIt */
+ GLchan It = texel[i][RCOMP], s = CHAN_MAX - It;
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, It);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, It);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, It);
+ /* Av = Af(1-It) + Ac*It */
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], s) + CHAN_PRODUCT(Ac, It);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-Ct) + CcCt */
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]);
+ /* Av = Af */
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ /* Cv = Cf(1-Ct) + CcCt */
+ rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]);
+ rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]);
+ rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]);
+ /* Av = AfAt */
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format (GL_BLEND) in texture_apply");
+ return;
+ }
+ break;
+
+ /* XXX don't clamp results if GLchan is float??? */
+
+ case GL_ADD: /* GL_EXT_texture_add_env */
+ switch (format) {
+ case GL_ALPHA:
+ for (i=0;i<n;i++) {
+ /* Rv = Rf */
+ /* Gv = Gf */
+ /* Bv = Bf */
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]);
+ }
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++) {
+ GLuint Lt = texel[i][RCOMP];
+ GLuint r = rgba[i][RCOMP] + Lt;
+ GLuint g = rgba[i][GCOMP] + Lt;
+ GLuint b = rgba[i][BCOMP] + Lt;
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+ /* Av = Af */
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ GLuint Lt = texel[i][RCOMP];
+ GLuint r = rgba[i][RCOMP] + Lt;
+ GLuint g = rgba[i][GCOMP] + Lt;
+ GLuint b = rgba[i][BCOMP] + Lt;
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]);
+ }
+ break;
+ case GL_INTENSITY:
+ for (i=0;i<n;i++) {
+ GLchan It = texel[i][RCOMP];
+ GLuint r = rgba[i][RCOMP] + It;
+ GLuint g = rgba[i][GCOMP] + It;
+ GLuint b = rgba[i][BCOMP] + It;
+ GLuint a = rgba[i][ACOMP] + It;
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+ rgba[i][ACOMP] = MIN2(a, CHAN_MAX);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ GLuint r = rgba[i][RCOMP] + texel[i][RCOMP];
+ GLuint g = rgba[i][GCOMP] + texel[i][GCOMP];
+ GLuint b = rgba[i][BCOMP] + texel[i][BCOMP];
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+ /* Av = Af */
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ GLuint r = rgba[i][RCOMP] + texel[i][RCOMP];
+ GLuint g = rgba[i][GCOMP] + texel[i][GCOMP];
+ GLuint b = rgba[i][BCOMP] + texel[i][BCOMP];
+ rgba[i][RCOMP] = MIN2(r, CHAN_MAX);
+ rgba[i][GCOMP] = MIN2(g, CHAN_MAX);
+ rgba[i][BCOMP] = MIN2(b, CHAN_MAX);
+ rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format (GL_ADD) in texture_apply");
+ return;
+ }
+ break;
+
+ default:
+ _mesa_problem(ctx, "Bad env mode in texture_apply");
+ return;
+ }
+}
+
+
+
+/**
+ * Apply texture mapping to a span of fragments.
+ */
+void
+_swrast_texture_span( GLcontext *ctx, struct sw_span *span )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLchan primary_rgba[MAX_WIDTH][4];
+ GLuint unit;
+
+ ASSERT(span->end < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_TEXTURE);
+
+ /*
+ * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
+ */
+ if (swrast->_AnyTextureCombine)
+ MEMCPY(primary_rgba, span->array->rgba, 4 * span->end * sizeof(GLchan));
+
+ /*
+ * Must do all texture sampling before combining in order to
+ * accomodate GL_ARB_texture_env_crossbar.
+ */
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ const struct gl_texture_object *curObj = texUnit->_Current;
+ GLfloat *lambda = span->array->lambda[unit];
+ GLchan (*texels)[4] = (GLchan (*)[4])
+ (swrast->TexelBuffer + unit * (span->end * 4 * sizeof(GLchan)));
+
+ /* 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 fragments) */
+ swrast->TextureSample[unit]( ctx, unit, texUnit->_Current, span->end,
+ (const GLfloat (*)[4]) span->array->texcoords[unit],
+ lambda, texels );
+
+ /* GL_SGI_texture_color_table */
+ if (texUnit->ColorTableEnabled) {
+ _mesa_lookup_rgba_chan(&texUnit->ColorTable, 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) {
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ if (texUnit->_CurrentCombine != &texUnit->_EnvMode ) {
+ texture_combine( ctx, unit, span->end,
+ (CONST GLchan (*)[4]) primary_rgba,
+ swrast->TexelBuffer,
+ span->array->rgba );
+ }
+ else {
+ /* conventional texture blend */
+ const GLchan (*texels)[4] = (const GLchan (*)[4])
+ (swrast->TexelBuffer + unit *
+ (span->end * 4 * sizeof(GLchan)));
+ texture_apply( ctx, texUnit, span->end,
+ (CONST GLchan (*)[4]) primary_rgba, texels,
+ span->array->rgba );
+ }
+ }
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.h
new file mode 100644
index 000000000..698f363a1
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_texture.h
@@ -0,0 +1,42 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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_TEXTURE_H
+#define S_TEXTURE_H
+
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+extern texture_sample_func
+_swrast_choose_texture_sample_func( GLcontext *ctx,
+ const struct gl_texture_object *tObj );
+
+
+extern void
+_swrast_texture_span( GLcontext *ctx, struct sw_span *span );
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c
new file mode 100644
index 000000000..16dea9477
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c
@@ -0,0 +1,1175 @@
+/*
+ * 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.
+ */
+
+
+/*
+ * 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 "glheader.h"
+#include "context.h"
+#include "colormac.h"
+#include "imports.h"
+#include "macros.h"
+#include "texformat.h"
+
+#include "s_aatriangle.h"
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_feedback.h"
+#include "s_span.h"
+#include "s_triangle.h"
+
+
+/*
+ * Just used for feedback mode.
+ */
+GLboolean
+_swrast_culltriangle( GLcontext *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ GLfloat ex = v1->win[0] - v0->win[0];
+ GLfloat ey = v1->win[1] - v0->win[1];
+ GLfloat fx = v2->win[0] - v0->win[0];
+ GLfloat fy = v2->win[1] - v0->win[1];
+ GLfloat c = ex*fy-ey*fx;
+
+ if (c * SWRAST_CONTEXT(ctx)->_BackfaceSign > 0)
+ return 0;
+
+ return 1;
+}
+
+
+
+/*
+ * Render a flat-shaded color index triangle.
+ */
+#define NAME flat_ci_triangle
+#define INTERP_Z 1
+#define INTERP_FOG 1
+#define SETUP_CODE \
+ span.interpMask |= SPAN_INDEX; \
+ span.index = FloatToFixed(v2->index);\
+ span.indexStep = 0;
+#define RENDER_SPAN( span ) _swrast_write_index_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render a smooth-shaded color index triangle.
+ */
+#define NAME smooth_ci_triangle
+#define INTERP_Z 1
+#define INTERP_FOG 1
+#define INTERP_INDEX 1
+#define RENDER_SPAN( span ) _swrast_write_index_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render a flat-shaded RGBA triangle.
+ */
+#define NAME flat_rgba_triangle
+#define INTERP_Z 1
+#define INTERP_FOG 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_FOG 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.
+ */
+#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][0];\
+ struct gl_texture_object *obj = ctx->Texture.Unit[0].Current2D; \
+ const GLint b = obj->BaseLevel; \
+ const GLfloat twidth = (GLfloat) obj->Image[0][b]->Width; \
+ const GLfloat theight = (GLfloat) obj->Image[0][b]->Height; \
+ const GLint twidth_log2 = obj->Image[0][b]->WidthLog2; \
+ const GLchan *texture = (const GLchan *) obj->Image[0][b]->Data; \
+ const GLint smask = obj->Image[0][b]->Width - 1; \
+ const GLint tmask = obj->Image[0][b]->Height - 1; \
+ if (!texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ 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 */ \
+ span.array->rgb[i][RCOMP] = texture[pos]; \
+ span.array->rgb[i][GCOMP] = texture[pos+1]; \
+ span.array->rgb[i][BCOMP] = texture[pos+2]; \
+ span.intTex[0] += span.intTexStep[0]; \
+ span.intTex[1] += span.intTexStep[1]; \
+ } \
+ rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, span.array->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][0];\
+ struct gl_texture_object *obj = ctx->Texture.Unit[0].Current2D; \
+ const GLint b = obj->BaseLevel; \
+ const GLfloat twidth = (GLfloat) obj->Image[0][b]->Width; \
+ const GLfloat theight = (GLfloat) obj->Image[0][b]->Height; \
+ const GLint twidth_log2 = obj->Image[0][b]->WidthLog2; \
+ const GLchan *texture = (const GLchan *) obj->Image[0][b]->Data; \
+ const GLint smask = obj->Image[0][b]->Width - 1; \
+ const GLint tmask = obj->Image[0][b]->Height - 1; \
+ if (!texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
+ span.intTex[1] -= FIXED_HALF; \
+ for (i = 0; i < span.end; i++) { \
+ const GLdepth 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 */ \
+ span.array->rgb[i][RCOMP] = texture[pos]; \
+ span.array->rgb[i][GCOMP] = texture[pos+1]; \
+ span.array->rgb[i][BCOMP] = texture[pos+2]; \
+ 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, \
+ span.array->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, struct sw_span *span,
+ struct affine_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 NEAREST_RGB \
+ sample[RCOMP] = tex00[RCOMP]; \
+ sample[GCOMP] = tex00[GCOMP]; \
+ sample[BCOMP] = tex00[BCOMP]; \
+ sample[ACOMP] = CHAN_MAX
+
+#define LINEAR_RGB \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[ACOMP] = CHAN_MAX;
+
+#define NEAREST_RGBA COPY_CHAN4(sample, tex00)
+
+#define LINEAR_RGBA \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[ACOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3])
+
+#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 COPY_CHAN4(dest, tex00)
+
+#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];
+
+ span->intTex[0] -= FIXED_HALF;
+ span->intTex[1] -= FIXED_HALF;
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case GL_RGB:
+ 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 GL_RGBA:
+ 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 GL_RGB:
+ 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 GL_RGBA:
+ 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);
+
+#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_FOG 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; \
+ struct gl_texture_object *obj = unit->Current2D; \
+ const GLint b = obj->BaseLevel; \
+ const GLfloat twidth = (GLfloat) obj->Image[0][b]->Width; \
+ const GLfloat theight = (GLfloat) obj->Image[0][b]->Height; \
+ info.texture = (const GLchan *) obj->Image[0][b]->Data; \
+ info.twidth_log2 = obj->Image[0][b]->WidthLog2; \
+ info.smask = obj->Image[0][b]->Width - 1; \
+ info.tmask = obj->Image[0][b]->Height - 1; \
+ info.format = obj->Image[0][b]->Format; \
+ info.filter = obj->MinFilter; \
+ info.envmode = unit->EnvMode; \
+ 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 GL_ALPHA: \
+ case GL_LUMINANCE: \
+ case GL_INTENSITY: \
+ info.tbytesline = obj->Image[0][b]->Width; \
+ break; \
+ case GL_LUMINANCE_ALPHA: \
+ info.tbytesline = obj->Image[0][b]->Width * 2; \
+ break; \
+ case GL_RGB: \
+ info.tbytesline = obj->Image[0][b]->Width * 3; \
+ break; \
+ case GL_RGBA: \
+ info.tbytesline = obj->Image[0][b]->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\
+ return; \
+ } \
+ info.tsize = obj->Image[0][b]->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, struct sw_span *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 savedTexEnable = ctx->Texture._EnabledUnits;
+ ctx->Texture._EnabledUnits = 0;
+
+ tex_coord[0] = span->tex[0][0] * (info->smask + 1);
+ tex_step[0] = span->texStepX[0][0] * (info->smask + 1);
+ tex_coord[1] = span->tex[0][1] * (info->tmask + 1);
+ tex_step[1] = span->texStepX[0][1] * (info->tmask + 1);
+ /* span->tex[0][2] only if 3D-texturing, here only 2D */
+ tex_coord[2] = span->tex[0][3];
+ tex_step[2] = span->texStepX[0][3];
+
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case GL_RGB:
+ 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 GL_RGBA:
+ 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 GL_RGB:
+ 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 GL_RGBA:
+ 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._EnabledUnits = savedTexEnable;
+}
+
+
+/*
+ * 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_W 1
+#define INTERP_FOG 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_TEX 1
+
+#define SETUP_CODE \
+ struct persp_info info; \
+ const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
+ const struct gl_texture_object *obj = unit->Current2D; \
+ const GLint b = obj->BaseLevel; \
+ info.texture = (const GLchan *) obj->Image[0][b]->Data; \
+ info.twidth_log2 = obj->Image[0][b]->WidthLog2; \
+ info.smask = obj->Image[0][b]->Width - 1; \
+ info.tmask = obj->Image[0][b]->Height - 1; \
+ info.format = obj->Image[0][b]->Format; \
+ info.filter = obj->MinFilter; \
+ info.envmode = unit->EnvMode; \
+ \
+ 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 GL_ALPHA: \
+ case GL_LUMINANCE: \
+ case GL_INTENSITY: \
+ info.tbytesline = obj->Image[0][b]->Width; \
+ break; \
+ case GL_LUMINANCE_ALPHA: \
+ info.tbytesline = obj->Image[0][b]->Width * 2; \
+ break; \
+ case GL_RGB: \
+ info.tbytesline = obj->Image[0][b]->Width * 3; \
+ break; \
+ case GL_RGBA: \
+ info.tbytesline = obj->Image[0][b]->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\
+ return; \
+ } \
+ info.tsize = obj->Image[0][b]->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_BITS != GL_FLOAT */
+
+
+
+
+/*
+ * Render a smooth-shaded, textured, RGBA triangle.
+ * Interpolate S,T,R with perspective correction, w/out mipmapping.
+ */
+#define NAME general_textured_triangle
+#define INTERP_Z 1
+#define INTERP_W 1
+#define INTERP_FOG 1
+#define INTERP_RGB 1
+#define INTERP_SPEC 1
+#define INTERP_ALPHA 1
+#define INTERP_TEX 1
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * This is the big one!
+ * Interpolate Z, RGB, Alpha, specular, fog, and N sets of texture coordinates.
+ * Yup, it's slow.
+ */
+#define NAME multitextured_triangle
+#define INTERP_Z 1
+#define INTERP_W 1
+#define INTERP_FOG 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_SPEC 1
+#define INTERP_MULTITEX 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->Attachment[BUFFER_DEPTH].Renderbuffer; \
+ ASSERT(ctx->Depth.Test); \
+ ASSERT(!ctx->Depth.Mask); \
+ ASSERT(ctx->Depth.Func == GL_LESS); \
+ if (ctx->OcclusionResult && !ctx->Occlusion.Active) { \
+ return; \
+ }
+#define RENDER_SPAN( span ) \
+ if (ctx->Visual.depthBits <= 16) { \
+ GLuint i; \
+ const GLushort *zRow = (const GLushort *) \
+ rb->GetPointer(ctx, rb, span.x, span.y); \
+ for (i = 0; i < span.end; i++) { \
+ GLdepth z = FixedToDepth(span.z); \
+ if (z < zRow[i]) { \
+ ctx->OcclusionResult = GL_TRUE; \
+ ctx->Occlusion.PassedCounter++; \
+ } \
+ 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]) { \
+ ctx->OcclusionResult = GL_TRUE; \
+ ctx->Occlusion.PassedCounter++; \
+ } \
+ 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;
+#if CHAN_TYPE == GL_FLOAT
+ GLfloat rSum, gSum, bSum;
+#else
+ GLint rSum, gSum, bSum;
+#endif
+ GLchan c[3][4];
+ /* save original colors */
+ COPY_CHAN4( c[0], ncv0->color );
+ COPY_CHAN4( c[1], ncv1->color );
+ COPY_CHAN4( c[2], ncv2->color );
+ /* sum v0 */
+ rSum = ncv0->color[0] + ncv0->specular[0];
+ gSum = ncv0->color[1] + ncv0->specular[1];
+ bSum = ncv0->color[2] + ncv0->specular[2];
+ ncv0->color[0] = MIN2(rSum, CHAN_MAX);
+ ncv0->color[1] = MIN2(gSum, CHAN_MAX);
+ ncv0->color[2] = MIN2(bSum, CHAN_MAX);
+ /* sum v1 */
+ rSum = ncv1->color[0] + ncv1->specular[0];
+ gSum = ncv1->color[1] + ncv1->specular[1];
+ bSum = ncv1->color[2] + ncv1->specular[2];
+ ncv1->color[0] = MIN2(rSum, CHAN_MAX);
+ ncv1->color[1] = MIN2(gSum, CHAN_MAX);
+ ncv1->color[2] = MIN2(bSum, CHAN_MAX);
+ /* sum v2 */
+ rSum = ncv2->color[0] + ncv2->specular[0];
+ gSum = ncv2->color[1] + ncv2->specular[1];
+ bSum = ncv2->color[2] + ncv2->specular[2];
+ ncv2->color[0] = MIN2(rSum, CHAN_MAX);
+ ncv2->color[1] = MIN2(gSum, CHAN_MAX);
+ ncv2->color[2] = MIN2(bSum, CHAN_MAX);
+ /* draw */
+ SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );
+ /* restore original colors */
+ COPY_CHAN4( ncv0->color, c[0] );
+ COPY_CHAN4( ncv1->color, c[1] );
+ COPY_CHAN4( ncv2->color, c[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);
+ const GLboolean rgbmode = ctx->Visual.rgbMode;
+
+ 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->Depth.OcclusionTest || ctx->Occlusion.Active) &&
+ ctx->Depth.Test &&
+ ctx->Depth.Mask == GL_FALSE &&
+ ctx->Depth.Func == GL_LESS &&
+ !ctx->Stencil.Enabled) {
+ if ((rgbmode &&
+ ctx->Color.ColorMask[0] == 0 &&
+ ctx->Color.ColorMask[1] == 0 &&
+ ctx->Color.ColorMask[2] == 0 &&
+ ctx->Color.ColorMask[3] == 0)
+ ||
+ (!rgbmode && ctx->Color.IndexMask == 0)) {
+ USE(occlusion_zless_triangle);
+ return;
+ }
+ }
+
+ if (ctx->Texture._EnabledCoordUnits || ctx->FragmentProgram._Active) {
+ /* 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;
+ GLint format;
+ texObj2D = ctx->Texture.Unit[0].Current2D;
+ texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;
+ format = texImg ? texImg->TexFormat->MesaFormat : -1;
+ minFilter = texObj2D ? texObj2D->MinFilter : (GLenum) 0;
+ magFilter = texObj2D ? texObj2D->MagFilter : (GLenum) 0;
+ 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._Active
+ && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT
+ && texObj2D->WrapS == GL_REPEAT
+ && texObj2D->WrapT == GL_REPEAT
+ && texObj2D->_IsPowerOfTwo
+ && texImg->Border == 0
+ && texImg->Width == texImg->RowStride
+ && (format == MESA_FORMAT_RGB || format == MESA_FORMAT_RGBA)
+ && minFilter == magFilter
+ && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR
+ && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT) {
+ if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {
+ if (minFilter == GL_NEAREST
+ && format == MESA_FORMAT_RGB
+ && (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->Visual.depthBits <= 16) {
+ if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
+ USE(simple_z_textured_triangle);
+ }
+ else {
+ USE(simple_textured_triangle);
+ }
+ }
+ else {
+#if (CHAN_BITS == 16 || CHAN_BITS == 32)
+ USE(general_textured_triangle);
+#else
+ USE(affine_textured_triangle);
+#endif
+ }
+ }
+ else {
+#if (CHAN_BITS == 16 || CHAN_BITS == 32)
+ USE(general_textured_triangle);
+#else
+ USE(persp_textured_triangle);
+#endif
+ }
+ }
+ else {
+ /* general case textured triangles */
+ if (ctx->Texture._EnabledCoordUnits > 1) {
+ USE(multitextured_triangle);
+ }
+ else {
+ USE(general_textured_triangle);
+ }
+ }
+ }
+ else {
+ ASSERT(!ctx->Texture._EnabledCoordUnits);
+ if (ctx->Light.ShadeModel==GL_SMOOTH) {
+ /* smooth shaded, no texturing, stippled or some raster ops */
+ if (rgbmode) {
+ USE(smooth_rgba_triangle);
+ }
+ else {
+ USE(smooth_ci_triangle);
+ }
+ }
+ else {
+ /* flat shaded, no texturing, stippled or some raster ops */
+ if (rgbmode) {
+ USE(flat_rgba_triangle);
+ }
+ else {
+ USE(flat_ci_triangle);
+ }
+ }
+ }
+ }
+ else if (ctx->RenderMode==GL_FEEDBACK) {
+ USE(_swrast_feedback_triangle);
+ }
+ else {
+ /* GL_SELECT mode */
+ USE(_swrast_select_triangle);
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.h
new file mode 100644
index 000000000..0de812500
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.h
@@ -0,0 +1,51 @@
+
+/*
+ * 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 "mtypes.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
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_trispan.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_trispan.h
new file mode 100644
index 000000000..15207e863
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_trispan.h
@@ -0,0 +1,31 @@
+
+/*
+ * 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_TRISPAN_H
+#define S_TRISPAN_H
+
+
+#endif /* S_TRISPAN_H */
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_tritemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_tritemp.h
new file mode 100644
index 000000000..a32d8a66b
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_tritemp.h
@@ -0,0 +1,1308 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4.1
+ *
+ * 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.
+ */
+
+/*
+ * 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 interplated across the triangle:
+ * INTERP_Z - if defined, interpolate vertex Z values
+ * INTERP_W - if defined, interpolate vertex W values
+ * INTERP_FOG - if defined, interpolate fog values
+ * INTERP_RGB - if defined, interpolate RGB values
+ * INTERP_ALPHA - if defined, interpolate Alpha values (req's INTERP_RGB)
+ * INTERP_SPEC - if defined, interpolate specular RGB values
+ * INTERP_INDEX - if defined, interpolate color index values
+ * INTERP_INT_TEX - if defined, interpolate integer ST texcoords
+ * (fast, simple 2-D texture mapping)
+ * INTERP_TEX - if defined, interpolate set 0 float STRQ texcoords
+ * NOTE: OpenGL STRQ = Mesa STUV (R was taken for red)
+ * INTERP_MULTITEX - if defined, interpolate N units of STRQ texcoords
+ *
+ * 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:
+ * 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
+ * CLEANUP_CODE - code to execute at end of 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.
+ */
+
+/*
+ * ColorTemp is used for intermediate color values.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ColorTemp GLfloat
+#else
+#define ColorTemp GLint /* same as GLfixed */
+#endif
+
+
+/*
+ * Walk triangle edges with GLfixed or GLdouble
+ */
+#if TRIANGLE_WALK_DOUBLE
+#define GLinterp GLdouble
+#define InterpToInt(X) ((GLint) (X))
+#define INTERP_ONE 1.0
+#else
+#define GLinterp GLfixed
+#define InterpToInt(X) FixedToInt(X)
+#define INTERP_ONE FIXED_ONE
+#endif
+
+
+/*
+ * Either loop over all texture units, or just use unit zero.
+ */
+#ifdef INTERP_MULTITEX
+#define TEX_UNIT_LOOP(CODE) \
+ { \
+ GLuint u; \
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { \
+ if (ctx->Texture._EnabledCoordUnits & (1 << u)) { \
+ CODE \
+ } \
+ } \
+ }
+#define INTERP_TEX
+#elif defined(INTERP_TEX)
+#define TEX_UNIT_LOOP(CODE) \
+ { \
+ const GLuint u = 0; \
+ CODE \
+ }
+#endif
+
+
+
+/*
+ * 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) */
+#if TRIANGLE_WALK_DOUBLE
+ GLdouble dx; /* X(v1) - X(v0) */
+ GLdouble dy; /* Y(v1) - Y(v0) */
+ GLdouble dxdy; /* dx/dy */
+ GLdouble adjy; /* adjust from v[0]->fy to fsy, scaled */
+ GLdouble fsx; /* first sample point x coord */
+ GLdouble fsy;
+ GLdouble fx0; /*X of lower endpoint */
+#else
+ 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 */
+#endif
+ GLint lines; /* number of lines to be sampled on this edge */
+ } EdgeT;
+
+#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;
+#if !TRIANGLE_WALK_DOUBLE
+ const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); /* for x/y coord snapping */
+#endif
+ GLinterp vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy;
+
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_POLYGON, 0, 0, 0);
+
+#ifdef INTERP_Z
+ (void) fixedToDepthShift;
+#endif
+
+ /*
+ printf("%s()\n", __FUNCTION__);
+ printf(" %g, %g, %g\n", v0->win[0], v0->win[1], v0->win[2]);
+ printf(" %g, %g, %g\n", v1->win[0], v1->win[1], v1->win[2]);
+ printf(" %g, %g, %g\n", v2->win[0], v2->win[1], v2->win[2]);
+ */
+ /*
+ ASSERT(v0->win[2] >= 0.0);
+ ASSERT(v1->win[2] >= 0.0);
+ ASSERT(v2->win[2] >= 0.0);
+ */
+ /* Compute fixed point x,y coords w/ half-pixel offsets and snapping.
+ * And find the order of the 3 vertices along the Y axis.
+ */
+ {
+#if TRIANGLE_WALK_DOUBLE
+ const GLdouble fy0 = v0->win[1] - 0.5;
+ const GLdouble fy1 = v1->win[1] - 0.5;
+ const GLdouble fy2 = v2->win[1] - 0.5;
+#else
+ const GLfixed fy0 = FloatToFixed(v0->win[1] - 0.5F) & snapMask;
+ const GLfixed fy1 = FloatToFixed(v1->win[1] - 0.5F) & snapMask;
+ const GLfixed fy2 = FloatToFixed(v2->win[1] - 0.5F) & snapMask;
+#endif
+ 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 */
+#if TRIANGLE_WALK_DOUBLE
+ vMin_fx = vMin->win[0] + 0.5;
+ vMid_fx = vMid->win[0] + 0.5;
+ vMax_fx = vMax->win[0] + 0.5;
+#else
+ vMin_fx = FloatToFixed(vMin->win[0] + 0.5F) & snapMask;
+ vMid_fx = FloatToFixed(vMid->win[0] + 0.5F) & snapMask;
+ vMax_fx = FloatToFixed(vMax->win[0] + 0.5F) & snapMask;
+#endif
+ }
+
+ /* 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] */
+#if TRIANGLE_WALK_DOUBLE
+ eMaj.dx = vMax_fx - vMin_fx;
+ eMaj.dy = vMax_fy - vMin_fy;
+ eTop.dx = vMax_fx - vMid_fx;
+ eTop.dy = vMax_fy - vMid_fy;
+ eBot.dx = vMid_fx - vMin_fx;
+ eBot.dy = vMid_fy - vMin_fy;
+#else
+ 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);
+#endif
+
+ /* compute area, oneOverArea and perform backface culling */
+ {
+#if TRIANGLE_WALK_DOUBLE
+ const GLdouble area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
+#else
+ const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
+#endif
+ /* Do backface culling */
+ if (area * bf < 0.0)
+ return;
+
+ if (IS_INF_OR_NAN(area) || area == 0.0F)
+ return;
+
+ oneOverArea = 1.0F / area;
+ }
+
+
+ span.facing = ctx->_Facing; /* for 2-sided stencil test */
+
+ /* Edge setup. For a triangle strip these could be reused... */
+ {
+#if TRIANGLE_WALK_DOUBLE
+ eMaj.fsy = CEILF(vMin_fy);
+ eMaj.lines = (GLint) CEILF(vMax_fy - eMaj.fsy);
+#else
+ eMaj.fsy = FixedCeil(vMin_fy);
+ eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy));
+#endif
+ if (eMaj.lines > 0) {
+ eMaj.dxdy = eMaj.dx / eMaj.dy;
+#if TRIANGLE_WALK_DOUBLE
+ eMaj.adjy = (eMaj.fsy - vMin_fy) * FIXED_SCALE; /* SCALED! */
+ eMaj.fx0 = vMin_fx;
+ eMaj.fsx = eMaj.fx0 + (eMaj.adjy * eMaj.dxdy) / (GLdouble) FIXED_SCALE;
+#else
+ 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);
+#endif
+ }
+ else {
+ return; /*CULLED*/
+ }
+
+#if TRIANGLE_WALK_DOUBLE
+ eTop.fsy = CEILF(vMid_fy);
+ eTop.lines = (GLint) CEILF(vMax_fy - eTop.fsy);
+#else
+ eTop.fsy = FixedCeil(vMid_fy);
+ eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy));
+#endif
+ if (eTop.lines > 0) {
+ eTop.dxdy = eTop.dx / eTop.dy;
+#if TRIANGLE_WALK_DOUBLE
+ eTop.adjy = (eTop.fsy - vMid_fy) * FIXED_SCALE; /* SCALED! */
+ eTop.fx0 = vMid_fx;
+ eTop.fsx = eTop.fx0 + (eTop.adjy * eTop.dxdy) / (GLdouble) FIXED_SCALE;
+#else
+ 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);
+#endif
+ }
+
+#if TRIANGLE_WALK_DOUBLE
+ eBot.fsy = CEILF(vMin_fy);
+ eBot.lines = (GLint) CEILF(vMid_fy - eBot.fsy);
+#else
+ eBot.fsy = FixedCeil(vMin_fy);
+ eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy));
+#endif
+ if (eBot.lines > 0) {
+ eBot.dxdy = eBot.dx / eBot.dy;
+#if TRIANGLE_WALK_DOUBLE
+ eBot.adjy = (eBot.fsy - vMin_fy) * FIXED_SCALE; /* SCALED! */
+ eBot.fx0 = vMin_fx;
+ eBot.fsx = eBot.fx0 + (eBot.adjy * eBot.dxdy) / (GLdouble) FIXED_SCALE;
+#else
+ 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);
+#endif
+ }
+ }
+
+ /*
+ * 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 */
+#ifdef INTERP_INDEX
+ GLfloat didx, didy;
+#endif
+
+ /*
+ * 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->win[2] - vMin->win[2];
+ GLfloat eBot_dz = vMid->win[2] - vMin->win[2];
+ span.dzdx = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
+ if (span.dzdx > maxDepth || span.dzdx < -maxDepth) {
+ /* probably a sliver triangle */
+ span.dzdx = 0.0;
+ span.dzdy = 0.0;
+ }
+ else {
+ span.dzdy = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
+ }
+ if (depthBits <= 16)
+ span.zStep = SignedFloatToFixed(span.dzdx);
+ else
+ span.zStep = (GLint) span.dzdx;
+ }
+#endif
+#ifdef INTERP_W
+ span.interpMask |= SPAN_W;
+ {
+ const GLfloat eMaj_dw = vMax->win[3] - vMin->win[3];
+ const GLfloat eBot_dw = vMid->win[3] - vMin->win[3];
+ span.dwdx = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw);
+ span.dwdy = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx);
+ }
+#endif
+#ifdef INTERP_FOG
+ span.interpMask |= SPAN_FOG;
+ {
+# ifdef INTERP_W
+ const GLfloat wMax = vMax->win[3], wMin = vMin->win[3], wMid = vMid->win[3];
+ const GLfloat eMaj_dfog = vMax->fog * wMax - vMin->fog * wMin;
+ const GLfloat eBot_dfog = vMid->fog * wMid - vMin->fog * wMin;
+# else
+ const GLfloat eMaj_dfog = vMax->fog - vMin->fog;
+ const GLfloat eBot_dfog = vMid->fog - vMin->fog;
+# endif
+ span.dfogdx = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
+ span.dfogdy = oneOverArea * (eMaj.dx * eBot_dfog - eMaj_dfog * eBot.dx);
+ span.fogStep = span.dfogdx;
+ }
+#endif
+#ifdef INTERP_RGB
+ span.interpMask |= SPAN_RGBA;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ GLfloat eMaj_dr = (GLfloat) ((ColorTemp) vMax->color[RCOMP] - (ColorTemp) vMin->color[RCOMP]);
+ GLfloat eBot_dr = (GLfloat) ((ColorTemp) vMid->color[RCOMP] - (ColorTemp) vMin->color[RCOMP]);
+ GLfloat eMaj_dg = (GLfloat) ((ColorTemp) vMax->color[GCOMP] - (ColorTemp) vMin->color[GCOMP]);
+ GLfloat eBot_dg = (GLfloat) ((ColorTemp) vMid->color[GCOMP] - (ColorTemp) vMin->color[GCOMP]);
+ GLfloat eMaj_db = (GLfloat) ((ColorTemp) vMax->color[BCOMP] - (ColorTemp) vMin->color[BCOMP]);
+ GLfloat eBot_db = (GLfloat) ((ColorTemp) vMid->color[BCOMP] - (ColorTemp) vMin->color[BCOMP]);
+# ifdef INTERP_ALPHA
+ GLfloat eMaj_da = (GLfloat) ((ColorTemp) vMax->color[ACOMP] - (ColorTemp) vMin->color[ACOMP]);
+ GLfloat eBot_da = (GLfloat) ((ColorTemp) vMid->color[ACOMP] - (ColorTemp) vMin->color[ACOMP]);
+# endif
+ span.drdx = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
+ span.drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
+ span.dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
+ span.dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
+ span.dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
+ span.dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+# if CHAN_TYPE == GL_FLOAT
+ span.redStep = span.drdx;
+ span.greenStep = span.dgdx;
+ span.blueStep = span.dbdx;
+# else
+ span.redStep = SignedFloatToFixed(span.drdx);
+ span.greenStep = SignedFloatToFixed(span.dgdx);
+ span.blueStep = SignedFloatToFixed(span.dbdx);
+# endif /* GL_FLOAT */
+# ifdef INTERP_ALPHA
+ span.dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+ span.dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+# if CHAN_TYPE == GL_FLOAT
+ span.alphaStep = span.dadx;
+# else
+ span.alphaStep = SignedFloatToFixed(span.dadx);
+# endif /* GL_FLOAT */
+# endif /* INTERP_ALPHA */
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ span.interpMask |= SPAN_FLAT;
+ span.drdx = span.drdy = 0.0F;
+ span.dgdx = span.dgdy = 0.0F;
+ span.dbdx = span.dbdy = 0.0F;
+# if CHAN_TYPE == GL_FLOAT
+ span.redStep = 0.0F;
+ span.greenStep = 0.0F;
+ span.blueStep = 0.0F;
+# else
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
+# endif /* GL_FLOAT */
+# ifdef INTERP_ALPHA
+ span.dadx = span.dady = 0.0F;
+# if CHAN_TYPE == GL_FLOAT
+ span.alphaStep = 0.0F;
+# else
+ span.alphaStep = 0;
+# endif /* GL_FLOAT */
+# endif
+ }
+#endif /* INTERP_RGB */
+#ifdef INTERP_SPEC
+ span.interpMask |= SPAN_SPEC;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ GLfloat eMaj_dsr = (GLfloat) ((ColorTemp) vMax->specular[RCOMP] - (ColorTemp) vMin->specular[RCOMP]);
+ GLfloat eBot_dsr = (GLfloat) ((ColorTemp) vMid->specular[RCOMP] - (ColorTemp) vMin->specular[RCOMP]);
+ GLfloat eMaj_dsg = (GLfloat) ((ColorTemp) vMax->specular[GCOMP] - (ColorTemp) vMin->specular[GCOMP]);
+ GLfloat eBot_dsg = (GLfloat) ((ColorTemp) vMid->specular[GCOMP] - (ColorTemp) vMin->specular[GCOMP]);
+ GLfloat eMaj_dsb = (GLfloat) ((ColorTemp) vMax->specular[BCOMP] - (ColorTemp) vMin->specular[BCOMP]);
+ GLfloat eBot_dsb = (GLfloat) ((ColorTemp) vMid->specular[BCOMP] - (ColorTemp) vMin->specular[BCOMP]);
+ span.dsrdx = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
+ span.dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
+ span.dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
+ span.dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
+ span.dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
+ span.dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
+# if CHAN_TYPE == GL_FLOAT
+ span.specRedStep = span.dsrdx;
+ span.specGreenStep = span.dsgdx;
+ span.specBlueStep = span.dsbdx;
+# else
+ span.specRedStep = SignedFloatToFixed(span.dsrdx);
+ span.specGreenStep = SignedFloatToFixed(span.dsgdx);
+ span.specBlueStep = SignedFloatToFixed(span.dsbdx);
+# endif
+ }
+ else {
+ span.dsrdx = span.dsrdy = 0.0F;
+ span.dsgdx = span.dsgdy = 0.0F;
+ span.dsbdx = span.dsbdy = 0.0F;
+# if CHAN_TYPE == GL_FLOAT
+ span.specRedStep = 0.0F;
+ span.specGreenStep = 0.0F;
+ span.specBlueStep = 0.0F;
+# else
+ span.specRedStep = 0;
+ span.specGreenStep = 0;
+ span.specBlueStep = 0;
+# endif
+ }
+#endif /* INTERP_SPEC */
+#ifdef INTERP_INDEX
+ span.interpMask |= SPAN_INDEX;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ GLfloat eMaj_di = vMax->index - vMin->index;
+ GLfloat eBot_di = vMid->index - vMin->index;
+ didx = oneOverArea * (eMaj_di * eBot.dy - eMaj.dy * eBot_di);
+ didy = oneOverArea * (eMaj.dx * eBot_di - eMaj_di * eBot.dx);
+ span.indexStep = SignedFloatToFixed(didx);
+ }
+ else {
+ span.interpMask |= SPAN_FLAT;
+ didx = didy = 0.0F;
+ span.indexStep = 0;
+ }
+#endif
+#ifdef INTERP_INT_TEX
+ span.interpMask |= SPAN_INT_TEXTURE;
+ {
+ GLfloat eMaj_ds = (vMax->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
+ GLfloat eBot_ds = (vMid->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
+ GLfloat eMaj_dt = (vMax->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
+ GLfloat eBot_dt = (vMid->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
+ span.texStepX[0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+ span.texStepY[0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ span.texStepX[0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+ span.texStepY[0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ span.intTexStep[0] = SignedFloatToFixed(span.texStepX[0][0]);
+ span.intTexStep[1] = SignedFloatToFixed(span.texStepX[0][1]);
+ }
+#endif
+#ifdef INTERP_TEX
+ span.interpMask |= SPAN_TEXTURE;
+ {
+ /* win[3] is 1/W */
+ const GLfloat wMax = vMax->win[3], wMin = vMin->win[3], wMid = vMid->win[3];
+ TEX_UNIT_LOOP(
+ GLfloat eMaj_ds = vMax->texcoord[u][0] * wMax - vMin->texcoord[u][0] * wMin;
+ GLfloat eBot_ds = vMid->texcoord[u][0] * wMid - vMin->texcoord[u][0] * wMin;
+ GLfloat eMaj_dt = vMax->texcoord[u][1] * wMax - vMin->texcoord[u][1] * wMin;
+ GLfloat eBot_dt = vMid->texcoord[u][1] * wMid - vMin->texcoord[u][1] * wMin;
+ GLfloat eMaj_du = vMax->texcoord[u][2] * wMax - vMin->texcoord[u][2] * wMin;
+ GLfloat eBot_du = vMid->texcoord[u][2] * wMid - vMin->texcoord[u][2] * wMin;
+ GLfloat eMaj_dv = vMax->texcoord[u][3] * wMax - vMin->texcoord[u][3] * wMin;
+ GLfloat eBot_dv = vMid->texcoord[u][3] * wMid - vMin->texcoord[u][3] * wMin;
+ span.texStepX[u][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+ span.texStepY[u][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ span.texStepX[u][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+ span.texStepY[u][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ span.texStepX[u][2] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
+ span.texStepY[u][2] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
+ span.texStepX[u][3] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
+ span.texStepY[u][3] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
+ )
+ }
+#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;
+ GLinterp fxLeftEdge = 0, fxRightEdge = 0;
+ GLinterp fdxLeftEdge = 0, fdxRightEdge = 0;
+ GLinterp 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
+ GLfixed zLeft = 0, fdzOuter = 0, fdzInner;
+#endif
+#ifdef INTERP_W
+ GLfloat wLeft = 0, dwOuter = 0, dwInner;
+#endif
+#ifdef INTERP_FOG
+ GLfloat fogLeft = 0, dfogOuter = 0, dfogInner;
+#endif
+#ifdef INTERP_RGB
+ ColorTemp rLeft = 0, fdrOuter = 0, fdrInner;
+ ColorTemp gLeft = 0, fdgOuter = 0, fdgInner;
+ ColorTemp bLeft = 0, fdbOuter = 0, fdbInner;
+#endif
+#ifdef INTERP_ALPHA
+ ColorTemp aLeft = 0, fdaOuter = 0, fdaInner;
+#endif
+#ifdef INTERP_SPEC
+ ColorTemp srLeft=0, dsrOuter=0, dsrInner;
+ ColorTemp sgLeft=0, dsgOuter=0, dsgInner;
+ ColorTemp sbLeft=0, dsbOuter=0, dsbInner;
+#endif
+#ifdef INTERP_INDEX
+ GLfixed iLeft=0, diOuter=0, diInner;
+#endif
+#ifdef INTERP_INT_TEX
+ GLfixed sLeft=0, dsOuter=0, dsInner;
+ GLfixed tLeft=0, dtOuter=0, dtInner;
+#endif
+#ifdef INTERP_TEX
+ GLfloat sLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat tLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat uLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat vLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dsOuter[MAX_TEXTURE_COORD_UNITS], dsInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dtOuter[MAX_TEXTURE_COORD_UNITS], dtInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat duOuter[MAX_TEXTURE_COORD_UNITS], duInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dvOuter[MAX_TEXTURE_COORD_UNITS], dvInner[MAX_TEXTURE_COORD_UNITS];
+#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;
+#if TRIANGLE_WALK_DOUBLE
+ const GLdouble fsy = eLeft->fsy;
+ const GLdouble fsx = eLeft->fsx;
+ const GLdouble fx = CEILF(fsx);
+ const GLdouble adjx = (fx - eLeft->fx0) * FIXED_SCALE; /* SCALED! */
+#else
+ const GLfixed fsy = eLeft->fsy;
+ const GLfixed fsx = eLeft->fsx; /* no fractional part */
+ const GLfixed fx = FixedCeil(fsx); /* no fractional part */
+ const GLfixed adjx = (GLinterp) (fx - eLeft->fx0); /* SCALED! */
+#endif
+ const GLinterp adjy = (GLinterp) eLeft->adjy; /* SCALED! */
+ GLint idxOuter;
+#if TRIANGLE_WALK_DOUBLE
+ GLdouble dxOuter;
+
+ fError = fx - fsx - 1.0;
+ fxLeftEdge = fsx;
+ fdxLeftEdge = eLeft->dxdy;
+ dxOuter = FLOORF(fdxLeftEdge);
+ fdError = dxOuter - fdxLeftEdge + 1.0;
+ idxOuter = (GLint) dxOuter;
+ span.y = (GLint) fsy;
+#else
+ 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);
+#endif
+
+ /* silence warnings on some compilers */
+ (void) dxOuter;
+ (void) adjx;
+ (void) adjy;
+ (void) vLower;
+
+#ifdef PIXEL_ADDRESS
+ {
+ pRow = (PIXEL_TYPE *) PIXEL_ADDRESS(InterpToInt(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->win[2];
+ if (depthBits <= 16) {
+ /* interpolate fixed-pt values */
+ GLfloat tmp = (z0 * FIXED_SCALE + span.dzdx * adjx + span.dzdy * adjy) + FIXED_HALF;
+ if (tmp < MAX_GLUINT / 2)
+ zLeft = (GLfixed) tmp;
+ else
+ zLeft = MAX_GLUINT / 2;
+ fdzOuter = SignedFloatToFixed(span.dzdy + dxOuter * span.dzdx);
+ }
+ else {
+ /* interpolate depth values exactly */
+ zLeft = (GLint) (z0 + span.dzdx * FixedToFloat(adjx) + span.dzdy * FixedToFloat(adjy));
+ fdzOuter = (GLint) (span.dzdy + dxOuter * span.dzdx);
+ }
+# ifdef DEPTH_TYPE
+ zRow = (DEPTH_TYPE *)
+ zrb->GetPointer(ctx, zrb, InterpToInt(fxLeftEdge), span.y);
+ dZRowOuter = (ctx->DrawBuffer->Width + idxOuter) * sizeof(DEPTH_TYPE);
+# endif
+ }
+#endif
+#ifdef INTERP_W
+ wLeft = vLower->win[3] + (span.dwdx * adjx + span.dwdy * adjy) * (1.0F/FIXED_SCALE);
+ dwOuter = span.dwdy + dxOuter * span.dwdx;
+#endif
+#ifdef INTERP_FOG
+# ifdef INTERP_W
+ fogLeft = vLower->fog * vLower->win[3] + (span.dfogdx * adjx + span.dfogdy * adjy) * (1.0F/FIXED_SCALE);
+# else
+ fogLeft = vLower->fog + (span.dfogdx * adjx + span.dfogdy * adjy) * (1.0F/FIXED_SCALE);
+# endif
+ dfogOuter = span.dfogdy + dxOuter * span.dfogdx;
+#endif
+#ifdef INTERP_RGB
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+# if CHAN_TYPE == GL_FLOAT
+ rLeft = vLower->color[RCOMP] + (span.drdx * adjx + span.drdy * adjy) * (1.0F / FIXED_SCALE);
+ gLeft = vLower->color[GCOMP] + (span.dgdx * adjx + span.dgdy * adjy) * (1.0F / FIXED_SCALE);
+ bLeft = vLower->color[BCOMP] + (span.dbdx * adjx + span.dbdy * adjy) * (1.0F / FIXED_SCALE);
+ fdrOuter = span.drdy + dxOuter * span.drdx;
+ fdgOuter = span.dgdy + dxOuter * span.dgdx;
+ fdbOuter = span.dbdy + dxOuter * span.dbdx;
+# else
+ rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP]) + span.drdx * adjx + span.drdy * adjy) + FIXED_HALF;
+ gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP]) + span.dgdx * adjx + span.dgdy * adjy) + FIXED_HALF;
+ bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP]) + span.dbdx * adjx + span.dbdy * adjy) + FIXED_HALF;
+ fdrOuter = SignedFloatToFixed(span.drdy + dxOuter * span.drdx);
+ fdgOuter = SignedFloatToFixed(span.dgdy + dxOuter * span.dgdx);
+ fdbOuter = SignedFloatToFixed(span.dbdy + dxOuter * span.dbdx);
+# endif
+# ifdef INTERP_ALPHA
+# if CHAN_TYPE == GL_FLOAT
+ aLeft = vLower->color[ACOMP] + (span.dadx * adjx + span.dady * adjy) * (1.0F / FIXED_SCALE);
+ fdaOuter = span.dady + dxOuter * span.dadx;
+# else
+ aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP]) + span.dadx * adjx + span.dady * adjy) + FIXED_HALF;
+ fdaOuter = SignedFloatToFixed(span.dady + dxOuter * span.dadx);
+# endif
+# endif
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+# if CHAN_TYPE == GL_FLOAT
+ rLeft = v2->color[RCOMP];
+ gLeft = v2->color[GCOMP];
+ bLeft = v2->color[BCOMP];
+ fdrOuter = fdgOuter = fdbOuter = 0.0F;
+# else
+ rLeft = ChanToFixed(v2->color[RCOMP]);
+ gLeft = ChanToFixed(v2->color[GCOMP]);
+ bLeft = ChanToFixed(v2->color[BCOMP]);
+ fdrOuter = fdgOuter = fdbOuter = 0;
+# endif
+# ifdef INTERP_ALPHA
+# if CHAN_TYPE == GL_FLOAT
+ aLeft = v2->color[ACOMP];
+ fdaOuter = 0.0F;
+# else
+ aLeft = ChanToFixed(v2->color[ACOMP]);
+ fdaOuter = 0;
+# endif
+# endif
+ }
+#endif /* INTERP_RGB */
+
+
+#ifdef INTERP_SPEC
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+# if CHAN_TYPE == GL_FLOAT
+ srLeft = vLower->specular[RCOMP] + (span.dsrdx * adjx + span.dsrdy * adjy) * (1.0F / FIXED_SCALE);
+ sgLeft = vLower->specular[GCOMP] + (span.dsgdx * adjx + span.dsgdy * adjy) * (1.0F / FIXED_SCALE);
+ sbLeft = vLower->specular[BCOMP] + (span.dsbdx * adjx + span.dsbdy * adjy) * (1.0F / FIXED_SCALE);
+ dsrOuter = span.dsrdy + dxOuter * span.dsrdx;
+ dsgOuter = span.dsgdy + dxOuter * span.dsgdx;
+ dsbOuter = span.dsbdy + dxOuter * span.dsbdx;
+# else
+ srLeft = (GLfixed) (ChanToFixed(vLower->specular[RCOMP]) + span.dsrdx * adjx + span.dsrdy * adjy) + FIXED_HALF;
+ sgLeft = (GLfixed) (ChanToFixed(vLower->specular[GCOMP]) + span.dsgdx * adjx + span.dsgdy * adjy) + FIXED_HALF;
+ sbLeft = (GLfixed) (ChanToFixed(vLower->specular[BCOMP]) + span.dsbdx * adjx + span.dsbdy * adjy) + FIXED_HALF;
+ dsrOuter = SignedFloatToFixed(span.dsrdy + dxOuter * span.dsrdx);
+ dsgOuter = SignedFloatToFixed(span.dsgdy + dxOuter * span.dsgdx);
+ dsbOuter = SignedFloatToFixed(span.dsbdy + dxOuter * span.dsbdx);
+# endif
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+#if CHAN_TYPE == GL_FLOAT
+ srLeft = v2->specular[RCOMP];
+ sgLeft = v2->specular[GCOMP];
+ sbLeft = v2->specular[BCOMP];
+ dsrOuter = dsgOuter = dsbOuter = 0.0F;
+# else
+ srLeft = ChanToFixed(v2->specular[RCOMP]);
+ sgLeft = ChanToFixed(v2->specular[GCOMP]);
+ sbLeft = ChanToFixed(v2->specular[BCOMP]);
+ dsrOuter = dsgOuter = dsbOuter = 0;
+# endif
+ }
+#endif
+
+#ifdef INTERP_INDEX
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ iLeft = (GLfixed)(vLower->index * FIXED_SCALE
+ + didx * adjx + didy * adjy) + FIXED_HALF;
+ diOuter = SignedFloatToFixed(didy + dxOuter * didx);
+ }
+ else {
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ iLeft = FloatToFixed(v2->index);
+ diOuter = 0;
+ }
+#endif
+#ifdef INTERP_INT_TEX
+ {
+ GLfloat s0, t0;
+ s0 = vLower->texcoord[0][0] * S_SCALE;
+ sLeft = (GLfixed)(s0 * FIXED_SCALE + span.texStepX[0][0] * adjx
+ + span.texStepY[0][0] * adjy) + FIXED_HALF;
+ dsOuter = SignedFloatToFixed(span.texStepY[0][0] + dxOuter * span.texStepX[0][0]);
+
+ t0 = vLower->texcoord[0][1] * T_SCALE;
+ tLeft = (GLfixed)(t0 * FIXED_SCALE + span.texStepX[0][1] * adjx
+ + span.texStepY[0][1] * adjy) + FIXED_HALF;
+ dtOuter = SignedFloatToFixed(span.texStepY[0][1] + dxOuter * span.texStepX[0][1]);
+ }
+#endif
+#ifdef INTERP_TEX
+ TEX_UNIT_LOOP(
+ const GLfloat invW = vLower->win[3];
+ const GLfloat s0 = vLower->texcoord[u][0] * invW;
+ const GLfloat t0 = vLower->texcoord[u][1] * invW;
+ const GLfloat u0 = vLower->texcoord[u][2] * invW;
+ const GLfloat v0 = vLower->texcoord[u][3] * invW;
+ sLeft[u] = s0 + (span.texStepX[u][0] * adjx + span.texStepY[u][0] * adjy) * (1.0F/FIXED_SCALE);
+ tLeft[u] = t0 + (span.texStepX[u][1] * adjx + span.texStepY[u][1] * adjy) * (1.0F/FIXED_SCALE);
+ uLeft[u] = u0 + (span.texStepX[u][2] * adjx + span.texStepY[u][2] * adjy) * (1.0F/FIXED_SCALE);
+ vLeft[u] = v0 + (span.texStepX[u][3] * adjx + span.texStepY[u][3] * adjy) * (1.0F/FIXED_SCALE);
+ dsOuter[u] = span.texStepY[u][0] + dxOuter * span.texStepX[u][0];
+ dtOuter[u] = span.texStepY[u][1] + dxOuter * span.texStepX[u][1];
+ duOuter[u] = span.texStepY[u][2] + dxOuter * span.texStepX[u][2];
+ dvOuter[u] = span.texStepY[u][3] + dxOuter * span.texStepX[u][3];
+ )
+#endif
+ } /*if setupLeft*/
+
+
+ if (setupRight && eRight->lines>0) {
+#if TRIANGLE_WALK_DOUBLE
+ fxRightEdge = eRight->fsx;
+ fdxRightEdge = eRight->dxdy;
+#else
+ fxRightEdge = eRight->fsx - FIXED_EPSILON;
+ fdxRightEdge = eRight->fdxdy;
+#endif
+ }
+
+ 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_W
+ dwInner = dwOuter + span.dwdx;
+#endif
+#ifdef INTERP_FOG
+ dfogInner = dfogOuter + span.dfogdx;
+#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_SPEC
+ dsrInner = dsrOuter + span.specRedStep;
+ dsgInner = dsgOuter + span.specGreenStep;
+ dsbInner = dsbOuter + span.specBlueStep;
+#endif
+#ifdef INTERP_INDEX
+ diInner = diOuter + span.indexStep;
+#endif
+#ifdef INTERP_INT_TEX
+ dsInner = dsOuter + span.intTexStep[0];
+ dtInner = dtOuter + span.intTexStep[1];
+#endif
+#ifdef INTERP_TEX
+ TEX_UNIT_LOOP(
+ dsInner[u] = dsOuter[u] + span.texStepX[u][0];
+ dtInner[u] = dtOuter[u] + span.texStepX[u][1];
+ duInner[u] = duOuter[u] + span.texStepX[u][2];
+ dvInner[u] = dvOuter[u] + span.texStepX[u][3];
+ )
+#endif
+
+ while (lines > 0) {
+ /* initialize the span interpolants to the leftmost value */
+ /* ff = fixed-pt fragment */
+ const GLint right = InterpToInt(fxRightEdge);
+ span.x = InterpToInt(fxLeftEdge);
+ if (right <= span.x)
+ span.end = 0;
+ else
+ span.end = right - span.x;
+
+#ifdef INTERP_Z
+ span.z = zLeft;
+#endif
+#ifdef INTERP_W
+ span.w = wLeft;
+#endif
+#ifdef INTERP_FOG
+ span.fog = fogLeft;
+#endif
+#ifdef INTERP_RGB
+ span.red = rLeft;
+ span.green = gLeft;
+ span.blue = bLeft;
+#endif
+#ifdef INTERP_ALPHA
+ span.alpha = aLeft;
+#endif
+#ifdef INTERP_SPEC
+ span.specRed = srLeft;
+ span.specGreen = sgLeft;
+ span.specBlue = sbLeft;
+#endif
+#ifdef INTERP_INDEX
+ span.index = iLeft;
+#endif
+#ifdef INTERP_INT_TEX
+ span.intTex[0] = sLeft;
+ span.intTex[1] = tLeft;
+#endif
+
+#ifdef INTERP_TEX
+ TEX_UNIT_LOOP(
+ span.tex[u][0] = sLeft[u];
+ span.tex[u][1] = tLeft[u];
+ span.tex[u][2] = uLeft[u];
+ span.tex[u][3] = vLeft[u];
+ )
+#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
+#ifdef INTERP_SPEC
+ CLAMP_INTERPOLANT(specRed, specRedStep, len);
+ CLAMP_INTERPOLANT(specGreen, specGreenStep, len);
+ CLAMP_INTERPOLANT(specBlue, specBlueStep, len);
+#endif
+#ifdef INTERP_INDEX
+ CLAMP_INTERPOLANT(index, indexStep, 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 -= INTERP_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_W
+ wLeft += dwOuter;
+#endif
+#ifdef INTERP_FOG
+ fogLeft += dfogOuter;
+#endif
+#ifdef INTERP_RGB
+ rLeft += fdrOuter;
+ gLeft += fdgOuter;
+ bLeft += fdbOuter;
+#endif
+#ifdef INTERP_ALPHA
+ aLeft += fdaOuter;
+#endif
+#ifdef INTERP_SPEC
+ srLeft += dsrOuter;
+ sgLeft += dsgOuter;
+ sbLeft += dsbOuter;
+#endif
+#ifdef INTERP_INDEX
+ iLeft += diOuter;
+#endif
+#ifdef INTERP_INT_TEX
+ sLeft += dsOuter;
+ tLeft += dtOuter;
+#endif
+#ifdef INTERP_TEX
+ TEX_UNIT_LOOP(
+ sLeft[u] += dsOuter[u];
+ tLeft[u] += dtOuter[u];
+ uLeft[u] += duOuter[u];
+ vLeft[u] += dvOuter[u];
+ )
+#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_W
+ wLeft += dwInner;
+#endif
+#ifdef INTERP_FOG
+ fogLeft += dfogInner;
+#endif
+#ifdef INTERP_RGB
+ rLeft += fdrInner;
+ gLeft += fdgInner;
+ bLeft += fdbInner;
+#endif
+#ifdef INTERP_ALPHA
+ aLeft += fdaInner;
+#endif
+#ifdef INTERP_SPEC
+ srLeft += dsrInner;
+ sgLeft += dsgInner;
+ sbLeft += dsbInner;
+#endif
+#ifdef INTERP_INDEX
+ iLeft += diInner;
+#endif
+#ifdef INTERP_INT_TEX
+ sLeft += dsInner;
+ tLeft += dtInner;
+#endif
+#ifdef INTERP_TEX
+ TEX_UNIT_LOOP(
+ sLeft[u] += dsInner[u];
+ tLeft[u] += dtInner[u];
+ uLeft[u] += duInner[u];
+ vLeft[u] += dvInner[u];
+ )
+#endif
+ }
+ } /*while lines>0*/
+
+ } /* for subTriangle */
+
+ }
+#ifdef CLEANUP_CODE
+ CLEANUP_CODE
+#endif
+ }
+}
+
+#undef SETUP_CODE
+#undef CLEANUP_CODE
+#undef RENDER_SPAN
+
+#undef PIXEL_TYPE
+#undef BYTES_PER_ROW
+#undef PIXEL_ADDRESS
+#undef DEPTH_TYPE
+
+#undef INTERP_Z
+#undef INTERP_W
+#undef INTERP_FOG
+#undef INTERP_RGB
+#undef INTERP_ALPHA
+#undef INTERP_SPEC
+#undef INTERP_INDEX
+#undef INTERP_INT_TEX
+#undef INTERP_TEX
+#undef INTERP_MULTITEX
+#undef TEX_UNIT_LOOP
+
+#undef S_SCALE
+#undef T_SCALE
+
+#undef FixedToDepth
+#undef ColorTemp
+#undef GLinterp
+#undef InterpToInt
+#undef INTERP_ONE
+
+#undef NAME
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
new file mode 100644
index 000000000..b67a29701
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
@@ -0,0 +1,428 @@
+
+/*
+ * 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.
+ */
+
+#include "glheader.h"
+#include "macros.h"
+#include "imports.h"
+#include "colormac.h"
+
+#include "s_context.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+/*
+ * Helper function called from _swrast_write_zoomed_rgba/rgb/index_span().
+ */
+static void
+zoom_span( GLcontext *ctx, const struct sw_span *span,
+ const GLvoid *src, GLint y0, GLenum format, GLint skipPixels )
+{
+ GLint r0, r1, row;
+ GLint c0, c1, skipCol;
+ GLint i, j;
+ const GLuint maxWidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+ struct sw_span zoomed;
+ struct span_arrays zoomed_arrays; /* this is big! */
+
+ /* no pixel arrays! must be horizontal spans. */
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+ ASSERT(span->primitive == GL_BITMAP);
+
+ INIT_SPAN(zoomed, GL_BITMAP, 0, 0, 0);
+ zoomed.array = &zoomed_arrays;
+
+ /* copy fog interp info */
+ zoomed.fog = span->fog;
+ zoomed.fogStep = span->fogStep;
+ /* XXX copy texcoord info? */
+
+ 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;
+ }
+ else if (format == GL_COLOR_INDEX) {
+ /* copy Z info */
+ zoomed.z = span->z;
+ zoomed.zStep = span->zStep;
+ /* we'll generate an array of color indexes */
+ zoomed.interpMask = span->interpMask & ~SPAN_INDEX;
+ zoomed.arrayMask |= SPAN_INDEX;
+ }
+ else {
+ assert(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;
+ }
+
+ /*
+ * Compute which columns to draw: [c0, c1)
+ */
+ c0 = (GLint) (span->x + skipPixels * ctx->Pixel.ZoomX);
+ c1 = (GLint) (span->x + (skipPixels + span->end) * ctx->Pixel.ZoomX);
+ if (c0 == c1) {
+ return;
+ }
+ else if (c1 < c0) {
+ /* swap */
+ GLint ctmp = c1;
+ c1 = c0;
+ c0 = ctmp;
+ }
+ if (c0 < 0) {
+ zoomed.x = 0;
+ zoomed.start = 0;
+ zoomed.end = c1;
+ skipCol = -c0;
+ }
+ else {
+ zoomed.x = c0;
+ zoomed.start = 0;
+ zoomed.end = c1 - c0;
+ skipCol = 0;
+ }
+ if (zoomed.end > maxWidth)
+ zoomed.end = maxWidth;
+
+ /*
+ * Compute which rows to draw: [r0, r1)
+ */
+ row = span->y - y0;
+ r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
+ r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
+ if (r0 == r1) {
+ return;
+ }
+ else if (r1 < r0) {
+ /* swap */
+ GLint rtmp = r1;
+ r1 = r0;
+ r0 = rtmp;
+ }
+
+ ASSERT(r0 < r1);
+ ASSERT(c0 < c1);
+
+ /*
+ * Trivial clip rejection testing.
+ */
+ if (r1 < 0) /* below window */
+ return;
+ if (r0 >= (GLint) ctx->DrawBuffer->Height) /* above window */
+ return;
+ if (c1 < 0) /* left of window */
+ return;
+ if (c0 >= (GLint) ctx->DrawBuffer->Width) /* right of window */
+ return;
+
+ /* zoom the span horizontally */
+ if (format == GL_RGBA) {
+ const GLchan (*rgba)[4] = (const GLchan (*)[4]) src;
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
+ }
+ }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (ctx->Pixel.ZoomX < 0.0) {
+ ASSERT(i <= 0);
+ i = span->end + i - 1;
+ }
+ ASSERT(i >= 0);
+ ASSERT(i < (GLint) span->end);
+ COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
+ }
+ }
+ }
+ else if (format == GL_RGB) {
+ const GLchan (*rgb)[3] = (const GLchan (*)[3]) src;
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ zoomed.array->rgba[j][0] = rgb[i][0];
+ zoomed.array->rgba[j][1] = rgb[i][1];
+ zoomed.array->rgba[j][2] = rgb[i][2];
+ zoomed.array->rgba[j][3] = CHAN_MAX;
+ }
+ }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (ctx->Pixel.ZoomX < 0.0) {
+ ASSERT(i <= 0);
+ i = span->end + i - 1;
+ }
+ ASSERT(i >= 0);
+ ASSERT(i < (GLint) span->end);
+ zoomed.array->rgba[j][0] = rgb[i][0];
+ zoomed.array->rgba[j][1] = rgb[i][1];
+ zoomed.array->rgba[j][2] = rgb[i][2];
+ zoomed.array->rgba[j][3] = CHAN_MAX;
+ }
+ }
+ }
+ else if (format == GL_COLOR_INDEX) {
+ const GLuint *indexes = (const GLuint *) src;
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ zoomed.array->index[j] = indexes[i];
+ }
+ }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (ctx->Pixel.ZoomX < 0.0) {
+ ASSERT(i <= 0);
+ i = span->end + i - 1;
+ }
+ ASSERT(i >= 0);
+ ASSERT(i < (GLint) span->end);
+ zoomed.array->index[j] = indexes[i];
+ }
+ }
+ }
+ else {
+ const GLdepth *zValues = (const GLuint *) src;
+ assert(format == GL_DEPTH_COMPONENT);
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ zoomed.array->z[j] = zValues[i];
+ }
+ }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (ctx->Pixel.ZoomX < 0.0) {
+ ASSERT(i <= 0);
+ i = span->end + i - 1;
+ }
+ ASSERT(i >= 0);
+ ASSERT(i < (GLint) span->end);
+ zoomed.array->z[j] = zValues[i];
+ }
+ }
+ /* Now, fall into either the RGB or COLOR_INDEX path below */
+ if (ctx->Visual.rgbMode)
+ format = GL_RGBA;
+ else
+ format = GL_COLOR_INDEX;
+ }
+
+
+ /* 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.
+ */
+ GLchan rgbaSave[MAX_WIDTH][4];
+ const GLint end = zoomed.end; /* save */
+ if (r1 - r0 > 1) {
+ MEMCPY(rgbaSave, zoomed.array->rgba, zoomed.end * 4 * sizeof(GLchan));
+ }
+ for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ _swrast_write_rgba_span(ctx, &zoomed);
+ zoomed.end = end; /* restore */
+ if (r1 - r0 > 1) {
+ /* restore the colors */
+ MEMCPY(zoomed.array->rgba, rgbaSave, zoomed.end*4 * sizeof(GLchan));
+ }
+ }
+ }
+ else if (format == GL_COLOR_INDEX) {
+ GLuint indexSave[MAX_WIDTH];
+ const GLint end = zoomed.end; /* save */
+ if (r1 - r0 > 1) {
+ MEMCPY(indexSave, zoomed.array->index, zoomed.end * sizeof(GLuint));
+ }
+ for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ _swrast_write_index_span(ctx, &zoomed);
+ zoomed.end = end; /* restore */
+ if (r1 - r0 > 1) {
+ /* restore the colors */
+ MEMCPY(zoomed.array->index, indexSave, zoomed.end * sizeof(GLuint));
+ }
+ }
+ }
+}
+
+
+void
+_swrast_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgba[][4], GLint y0,
+ GLint skipPixels )
+{
+ zoom_span(ctx, span, (const GLvoid *) rgba, y0, GL_RGBA, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgb[][3], GLint y0,
+ GLint skipPixels )
+{
+ zoom_span(ctx, span, (const GLvoid *) rgb, y0, GL_RGB, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0, GLint skipPixels )
+{
+ zoom_span(ctx, span, (const GLvoid *) span->array->index, y0,
+ GL_COLOR_INDEX, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0, GLint skipPixels )
+{
+ zoom_span(ctx, span, (const GLvoid *) span->array->z, y0,
+ GL_DEPTH_COMPONENT, skipPixels);
+}
+
+
+/*
+ * As above, but write stencil values.
+ */
+void
+_swrast_write_zoomed_stencil_span( GLcontext *ctx,
+ GLuint n, GLint x, GLint y,
+ const GLstencil stencil[], GLint y0,
+ GLint skipPixels )
+{
+ GLint m;
+ GLint r0, r1, row, r;
+ GLint i, j, skipcol;
+ GLstencil zstencil[MAX_WIDTH]; /* zoomed stencil values */
+ GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+
+ (void) skipPixels; /* XXX this shouldn't be ignored */
+
+ /* compute width of output row */
+ m = (GLint) FABSF( n * ctx->Pixel.ZoomX );
+ if (m==0) {
+ return;
+ }
+ if (ctx->Pixel.ZoomX<0.0) {
+ /* adjust x coordinate for left/right mirroring */
+ x = x - m;
+ }
+
+ /* compute which rows to draw */
+ row = y - y0;
+ r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
+ r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
+ if (r0==r1) {
+ return;
+ }
+ else if (r1<r0) {
+ GLint rtmp = r1;
+ r1 = r0;
+ r0 = rtmp;
+ }
+
+ /* return early if r0...r1 is above or below window */
+ if (r0<0 && r1<0) {
+ /* below window */
+ return;
+ }
+ if (r0 >= (GLint) ctx->DrawBuffer->Height &&
+ r1 >= (GLint) ctx->DrawBuffer->Height) {
+ /* above window */
+ return;
+ }
+
+ /* check if left edge is outside window */
+ skipcol = 0;
+ if (x<0) {
+ skipcol = -x;
+ m += x;
+ }
+ /* make sure span isn't too long or short */
+ if (m>maxwidth) {
+ m = maxwidth;
+ }
+ else if (m<=0) {
+ return;
+ }
+
+ ASSERT( m <= MAX_WIDTH );
+
+ /* zoom the span horizontally */
+ if (ctx->Pixel.ZoomX==-1.0F) {
+ /* n==m */
+ for (j=0;j<m;j++) {
+ i = n - (j+skipcol) - 1;
+ zstencil[j] = stencil[i];
+ }
+ }
+ else {
+ GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j=0;j<m;j++) {
+ i = (GLint) ((j+skipcol) * xscale);
+ if (i<0) i = n + i - 1;
+ zstencil[j] = stencil[i];
+ }
+ }
+
+ /* write the span */
+ for (r=r0; r<r1; r++) {
+ _swrast_write_stencil_span( ctx, m, x+skipcol, r, zstencil );
+ }
+}
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.h
new file mode 100644
index 000000000..aa9a891eb
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.h
@@ -0,0 +1,54 @@
+/*
+ * 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_ZOOM_H
+#define S_ZOOM_H
+
+#include "mtypes.h"
+#include "swrast.h"
+
+extern void
+_swrast_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgb[][4], GLint y0,
+ GLint skipPixels );
+
+extern void
+_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgb[][3], GLint y0,
+ GLint skipPixels );
+
+extern void
+_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0, GLint skipPixels );
+
+extern void
+_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0, GLint skipPixels );
+
+extern void
+_swrast_write_zoomed_stencil_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLstencil stencil[], GLint y0,
+ GLint skipPixels );
+
+#endif
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/swrast.h b/nx-X11/extras/Mesa/src/mesa/swrast/swrast.h
new file mode 100644
index 000000000..90123e513
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/swrast.h
@@ -0,0 +1,299 @@
+/*
+ * 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.
+ *
+ */
+
+/**
+ * \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 "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.
+ *
+ * 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 {
+ /** win[0], win[1] are the screen-coords of SWvertex.
+ * win[2] is the z-buffer coord (if 16-bit Z buffer, in range [0,65535]).
+ * win[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}.
+ */
+ GLfloat win[4];
+ GLfloat texcoord[MAX_TEXTURE_COORD_UNITS][4];
+ GLchan color[4];
+ GLchan specular[4];
+ GLfloat fog;
+ GLfloat index;
+ GLfloat pointSize;
+} SWvertex;
+
+
+struct swrast_device_driver;
+
+
+/* These are the public-access functions exported from swrast.
+ */
+extern void
+_swrast_use_read_buffer( GLcontext *ctx );
+
+extern void
+_swrast_use_draw_buffer( GLcontext *ctx );
+
+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_Clear( GLcontext *ctx, GLbitfield mask, GLboolean all,
+ GLint x, GLint y, GLint width, GLint height );
+
+extern void
+_swrast_Accum( GLcontext *ctx, GLenum op,
+ GLfloat value, GLint xpos, GLint ypos,
+ GLint width, GLint height );
+
+
+extern void
+_swrast_DrawBuffer( GLcontext *ctx, GLenum mode );
+
+
+extern void
+_swrast_DrawBuffers( GLcontext *ctx, GLsizei n, const GLenum *buffers );
+
+
+/* Reset the stipple counter
+ */
+extern void
+_swrast_ResetLineStipple( GLcontext *ctx );
+
+/* 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, GLuint 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 );
+
+
+/*
+ * Imaging fallbacks (a better solution should be found, perhaps
+ * moving all the imaging fallback code to a new module)
+ */
+extern void
+_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width,
+ GLsizei height);
+extern void
+_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width);
+extern void
+_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
+ GLint x, GLint y, GLsizei width);
+extern void
+_swrast_CopyColorTable( GLcontext *ctx,
+ GLenum target, GLenum internalformat,
+ GLint x, GLint y, GLsizei width);
+
+
+/*
+ * Texture fallbacks. Could also live in a new module
+ * with the rest of the texture store fallbacks?
+ */
+extern void
+_swrast_copy_teximage1d(GLcontext *ctx, GLenum target, GLint level,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLint border);
+
+extern void
+_swrast_copy_teximage2d(GLcontext *ctx, GLenum target, GLint level,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLint border);
+
+
+extern void
+_swrast_copy_texsubimage1d(GLcontext *ctx, GLenum target, GLint level,
+ GLint xoffset, GLint x, GLint y, GLsizei width);
+
+extern void
+_swrast_copy_texsubimage2d(GLcontext *ctx,
+ GLenum target, GLint level,
+ GLint xoffset, GLint yoffset,
+ GLint x, GLint y, GLsizei width, GLsizei height);
+
+extern void
+_swrast_copy_texsubimage3d(GLcontext *ctx,
+ GLenum target, GLint level,
+ GLint xoffset, GLint yoffset, GLint zoffset,
+ GLint x, GLint y, GLsizei width, GLsizei height);
+
+
+/* The driver interface for the software rasterizer.
+ * Unless otherwise noted, all functions are mandatory.
+ */
+struct swrast_device_driver {
+#if OLD_RENDERBUFFER
+ void (*SetBuffer)(GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit);
+ /*
+ * Specifies the current color buffer for span/pixel writing/reading.
+ * buffer indicates which window to write to / read from. Normally,
+ * this'll be the buffer currently bound to the context, but it doesn't
+ * have to be!
+ * bufferBit indicates which color buffer, exactly one of:
+ * DD_FRONT_LEFT_BIT - this buffer always exists
+ * DD_BACK_LEFT_BIT - when double buffering
+ * DD_FRONT_RIGHT_BIT - when using stereo
+ * DD_BACK_RIGHT_BIT - when using stereo and double buffering
+ * DD_AUXn_BIT - if aux buffers are implemented
+ */
+#endif
+
+ /***
+ *** Functions for synchronizing access to the framebuffer:
+ ***/
+
+ void (*SpanRenderStart)(GLcontext *ctx);
+ void (*SpanRenderFinish)(GLcontext *ctx);
+ /* OPTIONAL.
+ *
+ * Called before and after all rendering operations, including DrawPixels,
+ * ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands.
+ * 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.
+ */
+};
+
+
+
+#endif