diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c | 1175 |
1 files changed, 0 insertions, 1175 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c deleted file mode 100644 index 16dea9477..000000000 --- a/nx-X11/extras/Mesa/src/mesa/swrast/s_triangle.c +++ /dev/null @@ -1,1175 +0,0 @@ -/* - * 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); - } -} |