mesa libXext pixman git update 12 Apr 2011

1 files changed, 1143 insertions, 1143 deletions

diff --git a/mesalib/src/mesa/swrast/s_triangle.c b/mesalib/src/mesa/swrast/s_triangle.c
index c2c1ce221..8a9671aa0 100644
--- a/mesalib/src/mesa/swrast/s_triangle.c
+++ b/mesalib/src/mesa/swrast/s_triangle.c
@@ -1,1143 +1,1143 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.3

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the "Software"),

- * to deal in the Software without restriction, including without limitation

- * the rights to use, copy, modify, merge, publish, distribute, sublicense,

- * and/or sell copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following conditions:

- *

- * The above copyright notice and this permission notice shall be included

- * in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- */

-

-

-/*

- * When the device driver doesn't implement triangle rasterization it

- * can hook in _swrast_Triangle, which eventually calls one of these

- * functions to draw triangles.

- */

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/colormac.h"

-#include "main/imports.h"

-#include "main/macros.h"

-#include "main/mtypes.h"

-#include "main/state.h"

-#include "program/prog_instruction.h"

-

-#include "s_aatriangle.h"

-#include "s_context.h"

-#include "s_feedback.h"

-#include "s_span.h"

-#include "s_triangle.h"

-

-

-/**

- * Test if a triangle should be culled.  Used for feedback and selection mode.

- * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise.

- */

-GLboolean

-_swrast_culltriangle( struct gl_context *ctx,

-                      const SWvertex *v0,

-                      const SWvertex *v1,

-                      const SWvertex *v2 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];

-   GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];

-   GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];

-   GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];

-   GLfloat c = ex*fy-ey*fx;

-

-   if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F)

-      return GL_FALSE;

-

-   return GL_TRUE;

-}

-

-

-

-/*

- * Render a flat-shaded RGBA triangle.

- */

-#define NAME flat_rgba_triangle

-#define INTERP_Z 1

-#define SETUP_CODE				\

-   ASSERT(ctx->Texture._EnabledCoordUnits == 0);\

-   ASSERT(ctx->Light.ShadeModel==GL_FLAT);	\

-   span.interpMask |= SPAN_RGBA;		\

-   span.red = ChanToFixed(v2->color[0]);	\

-   span.green = ChanToFixed(v2->color[1]);	\

-   span.blue = ChanToFixed(v2->color[2]);	\

-   span.alpha = ChanToFixed(v2->color[3]);	\

-   span.redStep = 0;				\

-   span.greenStep = 0;				\

-   span.blueStep = 0;				\

-   span.alphaStep = 0;

-#define RENDER_SPAN( span )  _swrast_write_rgba_span(ctx, &span);

-#include "s_tritemp.h"

-

-

-

-/*

- * Render a smooth-shaded RGBA triangle.

- */

-#define NAME smooth_rgba_triangle

-#define INTERP_Z 1

-#define INTERP_RGB 1

-#define INTERP_ALPHA 1

-#define SETUP_CODE				\

-   {						\

-      /* texturing must be off */		\

-      ASSERT(ctx->Texture._EnabledCoordUnits == 0);	\

-      ASSERT(ctx->Light.ShadeModel==GL_SMOOTH);	\

-   }

-#define RENDER_SPAN( span )  _swrast_write_rgba_span(ctx, &span);

-#include "s_tritemp.h"

-

-

-

-/*

- * Render an RGB, GL_DECAL, textured triangle.

- * Interpolate S,T only w/out mipmapping or perspective correction.

- *

- * No fog.  No depth testing.

- */

-#define NAME simple_textured_triangle

-#define INTERP_INT_TEX 1

-#define S_SCALE twidth

-#define T_SCALE theight

-

-#define SETUP_CODE							\

-   struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];	\

-   const struct gl_texture_object *obj = 				\

-      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\

-   const struct gl_texture_image *texImg =				\

-      obj->Image[0][obj->BaseLevel];					\

-   const GLfloat twidth = (GLfloat) texImg->Width;			\

-   const GLfloat theight = (GLfloat) texImg->Height;			\

-   const GLint twidth_log2 = texImg->WidthLog2;				\

-   const GLubyte *texture = (const GLubyte *) texImg->Data;		\

-   const GLint smask = texImg->Width - 1;				\

-   const GLint tmask = texImg->Height - 1;				\

-   ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888);			\

-   if (!rb || !texture) {						\

-      return;								\

-   }

-

-#define RENDER_SPAN( span )						\

-   GLuint i;								\

-   GLubyte rgb[MAX_WIDTH][3];						\

-   span.intTex[0] -= FIXED_HALF; /* off-by-one error? */		\

-   span.intTex[1] -= FIXED_HALF;					\

-   for (i = 0; i < span.end; i++) {					\

-      GLint s = FixedToInt(span.intTex[0]) & smask;			\

-      GLint t = FixedToInt(span.intTex[1]) & tmask;			\

-      GLint pos = (t << twidth_log2) + s;				\

-      pos = pos + pos + pos;  /* multiply by 3 */			\

-      rgb[i][RCOMP] = texture[pos+2];					\

-      rgb[i][GCOMP] = texture[pos+1];					\

-      rgb[i][BCOMP] = texture[pos+0];					\

-      span.intTex[0] += span.intTexStep[0];				\

-      span.intTex[1] += span.intTexStep[1];				\

-   }									\

-   rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL);

-

-#include "s_tritemp.h"

-

-

-

-/*

- * Render an RGB, GL_DECAL, textured triangle.

- * Interpolate S,T, GL_LESS depth test, w/out mipmapping or

- * perspective correction.

- * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)

- *

- * No fog.

- */

-#define NAME simple_z_textured_triangle

-#define INTERP_Z 1

-#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE

-#define INTERP_INT_TEX 1

-#define S_SCALE twidth

-#define T_SCALE theight

-

-#define SETUP_CODE							\

-   struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];	\

-   const struct gl_texture_object *obj = 				\

-      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\

-   const struct gl_texture_image *texImg = 				\

-       obj->Image[0][obj->BaseLevel]; 					\

-   const GLfloat twidth = (GLfloat) texImg->Width;			\

-   const GLfloat theight = (GLfloat) texImg->Height;			\

-   const GLint twidth_log2 = texImg->WidthLog2;				\

-   const GLubyte *texture = (const GLubyte *) texImg->Data;		\

-   const GLint smask = texImg->Width - 1;				\

-   const GLint tmask = texImg->Height - 1;				\

-   ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888);			\

-   if (!rb || !texture) {						\

-      return;								\

-   }

-

-#define RENDER_SPAN( span )						\

-   GLuint i;				    				\

-   GLubyte rgb[MAX_WIDTH][3];						\

-   span.intTex[0] -= FIXED_HALF; /* off-by-one error? */		\

-   span.intTex[1] -= FIXED_HALF;					\

-   for (i = 0; i < span.end; i++) {					\

-      const GLuint z = FixedToDepth(span.z);				\

-      if (z < zRow[i]) {						\

-         GLint s = FixedToInt(span.intTex[0]) & smask;			\

-         GLint t = FixedToInt(span.intTex[1]) & tmask;			\

-         GLint pos = (t << twidth_log2) + s;				\

-         pos = pos + pos + pos;  /* multiply by 3 */			\

-         rgb[i][RCOMP] = texture[pos+2];				\

-         rgb[i][GCOMP] = texture[pos+1];				\

-         rgb[i][BCOMP] = texture[pos+0];				\

-         zRow[i] = z;							\

-         span.array->mask[i] = 1;					\

-      }									\

-      else {								\

-         span.array->mask[i] = 0;					\

-      }									\

-      span.intTex[0] += span.intTexStep[0];				\

-      span.intTex[1] += span.intTexStep[1];				\

-      span.z += span.zStep;						\

-   }									\

-   rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask);

-

-#include "s_tritemp.h"

-

-

-#if CHAN_TYPE != GL_FLOAT

-

-struct affine_info

-{

-   GLenum filter;

-   GLenum format;

-   GLenum envmode;

-   GLint smask, tmask;

-   GLint twidth_log2;

-   const GLchan *texture;

-   GLfixed er, eg, eb, ea;

-   GLint tbytesline, tsize;

-};

-

-

-static INLINE GLint

-ilerp(GLint t, GLint a, GLint b)

-{

-   return a + ((t * (b - a)) >> FIXED_SHIFT);

-}

-

-static INLINE GLint

-ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11)

-{

-   const GLint temp0 = ilerp(ia, v00, v10);

-   const GLint temp1 = ilerp(ia, v01, v11);

-   return ilerp(ib, temp0, temp1);

-}

-

-

-/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA

- * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD

- * texture env modes.

- */

-static INLINE void

-affine_span(struct gl_context *ctx, SWspan *span,

-            struct affine_info *info)

-{

-   GLchan sample[4];  /* the filtered texture sample */

-   const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;

-

-   /* Instead of defining a function for each mode, a test is done

-    * between the outer and inner loops. This is to reduce code size

-    * and complexity. Observe that an optimizing compiler kills

-    * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).

-    */

-

-#define NEAREST_RGB		\

-   sample[RCOMP] = tex00[2];	\

-   sample[GCOMP] = tex00[1];	\

-   sample[BCOMP] = tex00[0];	\

-   sample[ACOMP] = CHAN_MAX;

-

-#define LINEAR_RGB							\

-   sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\

-   sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\

-   sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\

-   sample[ACOMP] = CHAN_MAX;

-

-#define NEAREST_RGBA  \

-   sample[RCOMP] = tex00[3];	\

-   sample[GCOMP] = tex00[2];	\

-   sample[BCOMP] = tex00[1];	\

-   sample[ACOMP] = tex00[0];

-

-#define LINEAR_RGBA							\

-   sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\

-   sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\

-   sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\

-   sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0])

-

-#define MODULATE							  \

-   dest[RCOMP] = span->red   * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \

-   dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \

-   dest[BCOMP] = span->blue  * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \

-   dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8)

-

-#define DECAL								\

-   dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red +		\

-               ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT))	\

-               >> (FIXED_SHIFT + 8);					\

-   dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green +		\

-               ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT))	\

-               >> (FIXED_SHIFT + 8);					\

-   dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue +		\

-               ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT))	\

-               >> (FIXED_SHIFT + 8);					\

-   dest[ACOMP] = FixedToInt(span->alpha)

-

-#define BLEND								\

-   dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red		\

-               + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8);	\

-   dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green		\

-               + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8);	\

-   dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue		\

-               + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8);	\

-   dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8)

-

-#define REPLACE  COPY_CHAN4(dest, sample)

-

-#define ADD								\

-   {									\

-      GLint rSum = FixedToInt(span->red)   + (GLint) sample[RCOMP];	\

-      GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP];	\

-      GLint bSum = FixedToInt(span->blue)  + (GLint) sample[BCOMP];	\

-      dest[RCOMP] = MIN2(rSum, CHAN_MAX);				\

-      dest[GCOMP] = MIN2(gSum, CHAN_MAX);				\

-      dest[BCOMP] = MIN2(bSum, CHAN_MAX);				\

-      dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \

-  }

-

-/* shortcuts */

-

-#define NEAREST_RGB_REPLACE		\

-   NEAREST_RGB;				\

-   dest[0] = sample[0];			\

-   dest[1] = sample[1];			\

-   dest[2] = sample[2];			\

-   dest[3] = FixedToInt(span->alpha);

-

-#define NEAREST_RGBA_REPLACE  \

-   dest[RCOMP] = tex00[3]; \

-   dest[GCOMP] = tex00[2]; \

-   dest[BCOMP] = tex00[1]; \

-   dest[ACOMP] = tex00[0]

-

-#define SPAN_NEAREST(DO_TEX, COMPS)					\

-	for (i = 0; i < span->end; i++) {				\

-           /* Isn't it necessary to use FixedFloor below?? */		\

-           GLint s = FixedToInt(span->intTex[0]) & info->smask;		\

-           GLint t = FixedToInt(span->intTex[1]) & info->tmask;		\

-           GLint pos = (t << info->twidth_log2) + s;			\

-           const GLchan *tex00 = info->texture + COMPS * pos;		\

-           DO_TEX;							\

-           span->red += span->redStep;					\

-	   span->green += span->greenStep;				\

-           span->blue += span->blueStep;				\

-	   span->alpha += span->alphaStep;				\

-	   span->intTex[0] += span->intTexStep[0];			\

-	   span->intTex[1] += span->intTexStep[1];			\

-           dest += 4;							\

-	}

-

-#define SPAN_LINEAR(DO_TEX, COMPS)					\

-	for (i = 0; i < span->end; i++) {				\

-           /* Isn't it necessary to use FixedFloor below?? */		\

-           const GLint s = FixedToInt(span->intTex[0]) & info->smask;	\

-           const GLint t = FixedToInt(span->intTex[1]) & info->tmask;	\

-           const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK;	\

-           const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK;	\

-           const GLint pos = (t << info->twidth_log2) + s;		\

-           const GLchan *tex00 = info->texture + COMPS * pos;		\

-           const GLchan *tex10 = tex00 + info->tbytesline;		\

-           const GLchan *tex01 = tex00 + COMPS;				\

-           const GLchan *tex11 = tex10 + COMPS;				\

-           if (t == info->tmask) {					\

-              tex10 -= info->tsize;					\

-              tex11 -= info->tsize;					\

-           }								\

-           if (s == info->smask) {					\

-              tex01 -= info->tbytesline;				\

-              tex11 -= info->tbytesline;				\

-           }								\

-           DO_TEX;							\

-           span->red += span->redStep;					\

-	   span->green += span->greenStep;				\

-           span->blue += span->blueStep;				\

-	   span->alpha += span->alphaStep;				\

-	   span->intTex[0] += span->intTexStep[0];			\

-	   span->intTex[1] += span->intTexStep[1];			\

-           dest += 4;							\

-	}

-

-

-   GLuint i;

-   GLchan *dest = span->array->rgba[0];

-

-   /* Disable tex units so they're not re-applied in swrast_write_rgba_span */

-   ctx->Texture._EnabledCoordUnits = 0x0;

-

-   span->intTex[0] -= FIXED_HALF;

-   span->intTex[1] -= FIXED_HALF;

-   switch (info->filter) {

-   case GL_NEAREST:

-      switch (info->format) {

-      case MESA_FORMAT_RGB888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_NEAREST(NEAREST_RGB;MODULATE,3);

-            break;

-         case GL_DECAL:

-         case GL_REPLACE:

-            SPAN_NEAREST(NEAREST_RGB_REPLACE,3);

-            break;

-         case GL_BLEND:

-            SPAN_NEAREST(NEAREST_RGB;BLEND,3);

-            break;

-         case GL_ADD:

-            SPAN_NEAREST(NEAREST_RGB;ADD,3);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR");

-            return;

-         }

-         break;

-      case MESA_FORMAT_RGBA8888:

-         switch(info->envmode) {

-         case GL_MODULATE:

-            SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);

-            break;

-         case GL_DECAL:

-            SPAN_NEAREST(NEAREST_RGBA;DECAL,4);

-            break;

-         case GL_BLEND:

-            SPAN_NEAREST(NEAREST_RGBA;BLEND,4);

-            break;

-         case GL_ADD:

-            SPAN_NEAREST(NEAREST_RGBA;ADD,4);

-            break;

-         case GL_REPLACE:

-            SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      }

-      break;

-

-   case GL_LINEAR:

-      span->intTex[0] -= FIXED_HALF;

-      span->intTex[1] -= FIXED_HALF;

-      switch (info->format) {

-      case MESA_FORMAT_RGB888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_LINEAR(LINEAR_RGB;MODULATE,3);

-            break;

-         case GL_DECAL:

-         case GL_REPLACE:

-            SPAN_LINEAR(LINEAR_RGB;REPLACE,3);

-            break;

-         case GL_BLEND:

-            SPAN_LINEAR(LINEAR_RGB;BLEND,3);

-            break;

-         case GL_ADD:

-            SPAN_LINEAR(LINEAR_RGB;ADD,3);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      case MESA_FORMAT_RGBA8888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);

-            break;

-         case GL_DECAL:

-            SPAN_LINEAR(LINEAR_RGBA;DECAL,4);

-            break;

-         case GL_BLEND:

-            SPAN_LINEAR(LINEAR_RGBA;BLEND,4);

-            break;

-         case GL_ADD:

-            SPAN_LINEAR(LINEAR_RGBA;ADD,4);

-            break;

-         case GL_REPLACE:

-            SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      }

-      break;

-   }

-   span->interpMask &= ~SPAN_RGBA;

-   ASSERT(span->arrayMask & SPAN_RGBA);

-

-   _swrast_write_rgba_span(ctx, span);

-

-   /* re-enable texture units */

-   ctx->Texture._EnabledCoordUnits = texEnableSave;

-

-#undef SPAN_NEAREST

-#undef SPAN_LINEAR

-}

-

-

-

-/*

- * Render an RGB/RGBA textured triangle without perspective correction.

- */

-#define NAME affine_textured_triangle

-#define INTERP_Z 1

-#define INTERP_RGB 1

-#define INTERP_ALPHA 1

-#define INTERP_INT_TEX 1

-#define S_SCALE twidth

-#define T_SCALE theight

-

-#define SETUP_CODE							\

-   struct affine_info info;						\

-   struct gl_texture_unit *unit = ctx->Texture.Unit+0;			\

-   const struct gl_texture_object *obj = 				\

-      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\

-   const struct gl_texture_image *texImg = 				\

-      obj->Image[0][obj->BaseLevel]; 					\

-   const GLfloat twidth = (GLfloat) texImg->Width;			\

-   const GLfloat theight = (GLfloat) texImg->Height;			\

-   info.texture = (const GLchan *) texImg->Data;			\

-   info.twidth_log2 = texImg->WidthLog2;				\

-   info.smask = texImg->Width - 1;					\

-   info.tmask = texImg->Height - 1;					\

-   info.format = texImg->TexFormat;					\

-   info.filter = obj->MinFilter;					\

-   info.envmode = unit->EnvMode;					\

-   info.er = 0;					\

-   info.eg = 0;					\

-   info.eb = 0;					\

-   span.arrayMask |= SPAN_RGBA;						\

-									\

-   if (info.envmode == GL_BLEND) {					\

-      /* potential off-by-one error here? (1.0f -> 2048 -> 0) */	\

-      info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF);	\

-      info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF);	\

-      info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF);	\

-      info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF);	\

-   }									\

-   if (!info.texture) {							\

-      /* this shouldn't happen */					\

-      return;								\

-   }									\

-									\

-   switch (info.format) {						\

-   case MESA_FORMAT_RGB888:						\

-      info.tbytesline = texImg->Width * 3;				\

-      break;								\

-   case MESA_FORMAT_RGBA8888:						\

-      info.tbytesline = texImg->Width * 4;				\

-      break;								\

-   default:								\

-      _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\

-      return;								\

-   }									\

-   info.tsize = texImg->Height * info.tbytesline;

-

-#define RENDER_SPAN( span )   affine_span(ctx, &span, &info);

-

-#include "s_tritemp.h"

-

-

-

-struct persp_info

-{

-   GLenum filter;

-   GLenum format;

-   GLenum envmode;

-   GLint smask, tmask;

-   GLint twidth_log2;

-   const GLchan *texture;

-   GLfixed er, eg, eb, ea;   /* texture env color */

-   GLint tbytesline, tsize;

-};

-

-

-static INLINE void

-fast_persp_span(struct gl_context *ctx, SWspan *span,

-		struct persp_info *info)

-{

-   GLchan sample[4];  /* the filtered texture sample */

-

-  /* Instead of defining a function for each mode, a test is done

-   * between the outer and inner loops. This is to reduce code size

-   * and complexity. Observe that an optimizing compiler kills

-   * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).

-   */

-#define SPAN_NEAREST(DO_TEX,COMP)					\

-	for (i = 0; i < span->end; i++) {				\

-           GLdouble invQ = tex_coord[2] ?				\

-                                 (1.0 / tex_coord[2]) : 1.0;            \

-           GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ);		\

-           GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ);		\

-           GLint s = IFLOOR(s_tmp) & info->smask;	        	\

-           GLint t = IFLOOR(t_tmp) & info->tmask;	        	\

-           GLint pos = (t << info->twidth_log2) + s;			\

-           const GLchan *tex00 = info->texture + COMP * pos;		\

-           DO_TEX;							\

-           span->red += span->redStep;					\

-	   span->green += span->greenStep;				\

-           span->blue += span->blueStep;				\

-	   span->alpha += span->alphaStep;				\

-	   tex_coord[0] += tex_step[0];					\

-	   tex_coord[1] += tex_step[1];					\

-	   tex_coord[2] += tex_step[2];					\

-           dest += 4;							\

-	}

-

-#define SPAN_LINEAR(DO_TEX,COMP)					\

-	for (i = 0; i < span->end; i++) {				\

-           GLdouble invQ = tex_coord[2] ?				\

-                                 (1.0 / tex_coord[2]) : 1.0;            \

-           const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ);	\

-           const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ);	\

-           const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF;	\

-           const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF;      \

-           const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask;	\

-           const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask;	\

-           const GLfixed sf = s_fix & FIXED_FRAC_MASK;			\

-           const GLfixed tf = t_fix & FIXED_FRAC_MASK;			\

-           const GLint pos = (t << info->twidth_log2) + s;		\

-           const GLchan *tex00 = info->texture + COMP * pos;		\

-           const GLchan *tex10 = tex00 + info->tbytesline;		\

-           const GLchan *tex01 = tex00 + COMP;				\

-           const GLchan *tex11 = tex10 + COMP;				\

-           if (t == info->tmask) {					\

-              tex10 -= info->tsize;					\

-              tex11 -= info->tsize;					\

-           }								\

-           if (s == info->smask) {					\

-              tex01 -= info->tbytesline;				\

-              tex11 -= info->tbytesline;				\

-           }								\

-           DO_TEX;							\

-           span->red   += span->redStep;				\

-	   span->green += span->greenStep;				\

-           span->blue  += span->blueStep;				\

-	   span->alpha += span->alphaStep;				\

-	   tex_coord[0] += tex_step[0];					\

-	   tex_coord[1] += tex_step[1];					\

-	   tex_coord[2] += tex_step[2];					\

-           dest += 4;							\

-	}

-

-   GLuint i;

-   GLfloat tex_coord[3], tex_step[3];

-   GLchan *dest = span->array->rgba[0];

-

-   const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;

-   ctx->Texture._EnabledCoordUnits = 0;

-

-   tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0]  * (info->smask + 1);

-   tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);

-   tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);

-   tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);

-   /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */

-   tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3];

-   tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3];

-

-   switch (info->filter) {

-   case GL_NEAREST:

-      switch (info->format) {

-      case MESA_FORMAT_RGB888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_NEAREST(NEAREST_RGB;MODULATE,3);

-            break;

-         case GL_DECAL:

-         case GL_REPLACE:

-            SPAN_NEAREST(NEAREST_RGB_REPLACE,3);

-            break;

-         case GL_BLEND:

-            SPAN_NEAREST(NEAREST_RGB;BLEND,3);

-            break;

-         case GL_ADD:

-            SPAN_NEAREST(NEAREST_RGB;ADD,3);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      case MESA_FORMAT_RGBA8888:

-         switch(info->envmode) {

-         case GL_MODULATE:

-            SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);

-            break;

-         case GL_DECAL:

-            SPAN_NEAREST(NEAREST_RGBA;DECAL,4);

-            break;

-         case GL_BLEND:

-            SPAN_NEAREST(NEAREST_RGBA;BLEND,4);

-            break;

-         case GL_ADD:

-            SPAN_NEAREST(NEAREST_RGBA;ADD,4);

-            break;

-         case GL_REPLACE:

-            SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      }

-      break;

-

-   case GL_LINEAR:

-      switch (info->format) {

-      case MESA_FORMAT_RGB888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_LINEAR(LINEAR_RGB;MODULATE,3);

-            break;

-         case GL_DECAL:

-         case GL_REPLACE:

-            SPAN_LINEAR(LINEAR_RGB;REPLACE,3);

-            break;

-         case GL_BLEND:

-            SPAN_LINEAR(LINEAR_RGB;BLEND,3);

-            break;

-         case GL_ADD:

-            SPAN_LINEAR(LINEAR_RGB;ADD,3);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      case MESA_FORMAT_RGBA8888:

-         switch (info->envmode) {

-         case GL_MODULATE:

-            SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);

-            break;

-         case GL_DECAL:

-            SPAN_LINEAR(LINEAR_RGBA;DECAL,4);

-            break;

-         case GL_BLEND:

-            SPAN_LINEAR(LINEAR_RGBA;BLEND,4);

-            break;

-         case GL_ADD:

-            SPAN_LINEAR(LINEAR_RGBA;ADD,4);

-            break;

-         case GL_REPLACE:

-            SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);

-            break;

-         default:

-            _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR");

-            return;

-         }

-         break;

-      }

-      break;

-   }

-   

-   ASSERT(span->arrayMask & SPAN_RGBA);

-   _swrast_write_rgba_span(ctx, span);

-

-#undef SPAN_NEAREST

-#undef SPAN_LINEAR

-

-   /* restore state */

-   ctx->Texture._EnabledCoordUnits = texEnableSave;

-}

-

-

-/*

- * Render an perspective corrected RGB/RGBA textured triangle.

- * The Q (aka V in Mesa) coordinate must be zero such that the divide

- * by interpolated Q/W comes out right.

- *

- */

-#define NAME persp_textured_triangle

-#define INTERP_Z 1

-#define INTERP_RGB 1

-#define INTERP_ALPHA 1

-#define INTERP_ATTRIBS 1

-

-#define SETUP_CODE							\

-   struct persp_info info;						\

-   const struct gl_texture_unit *unit = ctx->Texture.Unit+0;		\

-   const struct gl_texture_object *obj = 				\

-      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\

-   const struct gl_texture_image *texImg = 				\

-      obj->Image[0][obj->BaseLevel];			 		\

-   info.texture = (const GLchan *) texImg->Data;			\

-   info.twidth_log2 = texImg->WidthLog2;				\

-   info.smask = texImg->Width - 1;					\

-   info.tmask = texImg->Height - 1;					\

-   info.format = texImg->TexFormat;					\

-   info.filter = obj->MinFilter;					\

-   info.envmode = unit->EnvMode;					\

-   info.er = 0;					\

-   info.eg = 0;					\

-   info.eb = 0;					\

-									\

-   if (info.envmode == GL_BLEND) {					\

-      /* potential off-by-one error here? (1.0f -> 2048 -> 0) */	\

-      info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF);	\

-      info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF);	\

-      info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF);	\

-      info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF);	\

-   }									\

-   if (!info.texture) {							\

-      /* this shouldn't happen */					\

-      return;								\

-   }									\

-									\

-   switch (info.format) {						\

-   case MESA_FORMAT_RGB888:						\

-      info.tbytesline = texImg->Width * 3;				\

-      break;								\

-   case MESA_FORMAT_RGBA8888:						\

-      info.tbytesline = texImg->Width * 4;				\

-      break;								\

-   default:								\

-      _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\

-      return;								\

-   }									\

-   info.tsize = texImg->Height * info.tbytesline;

-

-#define RENDER_SPAN( span )			\

-   span.interpMask &= ~SPAN_RGBA;		\

-   span.arrayMask |= SPAN_RGBA;			\

-   fast_persp_span(ctx, &span, &info);

-

-#include "s_tritemp.h"

-

-#endif /*CHAN_TYPE != GL_FLOAT*/

-

-

-

-/*

- * Render an RGBA triangle with arbitrary attributes.

- */

-#define NAME general_triangle

-#define INTERP_Z 1

-#define INTERP_RGB 1

-#define INTERP_ALPHA 1

-#define INTERP_ATTRIBS 1

-#define RENDER_SPAN( span )   _swrast_write_rgba_span(ctx, &span);

-#include "s_tritemp.h"

-

-

-

-

-/*

- * Special tri function for occlusion testing

- */

-#define NAME occlusion_zless_triangle

-#define INTERP_Z 1

-#define SETUP_CODE							\

-   struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer;		\

-   struct gl_query_object *q = ctx->Query.CurrentOcclusionObject;	\

-   ASSERT(ctx->Depth.Test);						\

-   ASSERT(!ctx->Depth.Mask);						\

-   ASSERT(ctx->Depth.Func == GL_LESS);					\

-   if (!q) {								\

-      return;								\

-   }

-#define RENDER_SPAN( span )						\

-   if (rb->Format == MESA_FORMAT_Z16) {					\

-      GLuint i;								\

-      const GLushort *zRow = (const GLushort *)				\

-         rb->GetPointer(ctx, rb, span.x, span.y);			\

-      for (i = 0; i < span.end; i++) {					\

-         GLuint z = FixedToDepth(span.z);				\

-         if (z < zRow[i]) {						\

-            q->Result++;						\

-         }								\

-         span.z += span.zStep;						\

-      }									\

-   }									\

-   else {								\

-      GLuint i;								\

-      const GLuint *zRow = (const GLuint *)				\

-         rb->GetPointer(ctx, rb, span.x, span.y);			\

-      for (i = 0; i < span.end; i++) {					\

-         if ((GLuint)span.z < zRow[i]) {				\

-            q->Result++;						\

-         }								\

-         span.z += span.zStep;						\

-      }									\

-   }

-#include "s_tritemp.h"

-

-

-

-static void

-nodraw_triangle( struct gl_context *ctx,

-                 const SWvertex *v0,

-                 const SWvertex *v1,

-                 const SWvertex *v2 )

-{

-   (void) (ctx && v0 && v1 && v2);

-}

-

-

-/*

- * This is used when separate specular color is enabled, but not

- * texturing.  We add the specular color to the primary color,

- * draw the triangle, then restore the original primary color.

- * Inefficient, but seldom needed.

- */

-void

-_swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0,

-                                const SWvertex *v1, const SWvertex *v2)

-{

-   SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */

-   SWvertex *ncv1 = (SWvertex *)v1;

-   SWvertex *ncv2 = (SWvertex *)v2;

-   GLfloat rSum, gSum, bSum;

-   GLchan cSave[3][4];

-

-   /* save original colors */

-   COPY_CHAN4( cSave[0], ncv0->color );

-   COPY_CHAN4( cSave[1], ncv1->color );

-   COPY_CHAN4( cSave[2], ncv2->color );

-   /* sum v0 */

-   rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];

-   gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];

-   bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];

-   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);

-   /* sum v1 */

-   rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];

-   gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];

-   bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];

-   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);

-   /* sum v2 */

-   rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0];

-   gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1];

-   bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2];

-   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum);

-   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum);

-   /* draw */

-   SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );

-   /* restore original colors */

-   COPY_CHAN4( ncv0->color, cSave[0] );

-   COPY_CHAN4( ncv1->color, cSave[1] );

-   COPY_CHAN4( ncv2->color, cSave[2] );

-}

-

-

-

-#ifdef DEBUG

-

-/* record the current triangle function name */

-const char *_mesa_triFuncName = NULL;

-

-#define USE(triFunc)				\

-do {						\

-    _mesa_triFuncName = #triFunc;		\

-    /*printf("%s\n", _mesa_triFuncName);*/	\

-    swrast->Triangle = triFunc;			\

-} while (0)

-

-#else

-

-#define USE(triFunc)  swrast->Triangle = triFunc;

-

-#endif

-

-

-

-

-/*

- * Determine which triangle rendering function to use given the current

- * rendering context.

- *

- * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or

- * remove tests to this code.

- */

-void

-_swrast_choose_triangle( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   if (ctx->Polygon.CullFlag &&

-       ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) {

-      USE(nodraw_triangle);

-      return;

-   }

-

-   if (ctx->RenderMode==GL_RENDER) {

-

-      if (ctx->Polygon.SmoothFlag) {

-         _swrast_set_aa_triangle_function(ctx);

-         ASSERT(swrast->Triangle);

-         return;

-      }

-

-      /* special case for occlusion testing */

-      if (ctx->Query.CurrentOcclusionObject &&

-          ctx->Depth.Test &&

-          ctx->Depth.Mask == GL_FALSE &&

-          ctx->Depth.Func == GL_LESS &&

-          !ctx->Stencil._Enabled) {

-         if (ctx->Color.ColorMask[0][0] == 0 &&

-	     ctx->Color.ColorMask[0][1] == 0 &&

-	     ctx->Color.ColorMask[0][2] == 0 &&

-	     ctx->Color.ColorMask[0][3] == 0) {

-            USE(occlusion_zless_triangle);

-            return;

-         }

-      }

-

-      /*

-       * XXX should examine swrast->_ActiveAttribMask to determine what

-       * needs to be interpolated.

-       */

-      if (ctx->Texture._EnabledCoordUnits ||

-          ctx->FragmentProgram._Current ||

-          ctx->ATIFragmentShader._Enabled ||

-          _mesa_need_secondary_color(ctx) ||

-          swrast->_FogEnabled) {

-         /* Ugh, we do a _lot_ of tests to pick the best textured tri func */

-         const struct gl_texture_object *texObj2D;

-         const struct gl_texture_image *texImg;

-         GLenum minFilter, magFilter, envMode;

-         gl_format format;

-         texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];

-

-         texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;

-         format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE;

-         minFilter = texObj2D ? texObj2D->MinFilter : GL_NONE;

-         magFilter = texObj2D ? texObj2D->MagFilter : GL_NONE;

-         envMode = ctx->Texture.Unit[0].EnvMode;

-

-         /* First see if we can use an optimized 2-D texture function */

-         if (ctx->Texture._EnabledCoordUnits == 0x1

-             && !ctx->FragmentProgram._Current

-             && !ctx->ATIFragmentShader._Enabled

-             && ctx->Texture._EnabledUnits == 0x1

-             && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT

-             && texObj2D->WrapS == GL_REPEAT

-             && texObj2D->WrapT == GL_REPEAT

-             && texObj2D->_Swizzle == SWIZZLE_NOOP

-             && texImg->_IsPowerOfTwo

-             && texImg->Border == 0

-             && texImg->Width == texImg->RowStride

-             && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888)

-             && minFilter == magFilter

-             && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR

-             && !swrast->_FogEnabled

-             && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT

-             && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) {

-	    if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {

-	       if (minFilter == GL_NEAREST

-		   && format == MESA_FORMAT_RGB888

-		   && (envMode == GL_REPLACE || envMode == GL_DECAL)

-		   && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)

-			&& ctx->Depth.Func == GL_LESS

-			&& ctx->Depth.Mask == GL_TRUE)

-		       || swrast->_RasterMask == TEXTURE_BIT)

-		   && ctx->Polygon.StippleFlag == GL_FALSE

-                   && ctx->DrawBuffer->Visual.depthBits <= 16) {

-		  if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {

-		     USE(simple_z_textured_triangle);

-		  }

-		  else {

-		     USE(simple_textured_triangle);

-		  }

-	       }

-	       else {

-#if CHAN_BITS != 8

-                  USE(general_triangle);

-#else

-                  if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) {

-                     /* We only handle RGBA8888 correctly on little endian

-                      * in the optimized code above.

-                      */

-                     USE(general_triangle);

-                  }

-                  else {

-                     USE(affine_textured_triangle);

-                 }

-#endif

-	       }

-	    }

-	    else {

-#if CHAN_BITS != 8

-               USE(general_triangle);

-#else

-               USE(persp_textured_triangle);

-#endif

-	    }

-	 }

-         else {

-            /* general case textured triangles */

-            USE(general_triangle);

-         }

-      }

-      else {

-         ASSERT(!swrast->_FogEnabled);

-         ASSERT(!_mesa_need_secondary_color(ctx));

-	 if (ctx->Light.ShadeModel==GL_SMOOTH) {

-	    /* smooth shaded, no texturing, stippled or some raster ops */

-#if CHAN_BITS != 8

-               USE(general_triangle);

-#else

-               USE(smooth_rgba_triangle);

-#endif

-	 }

-	 else {

-	    /* flat shaded, no texturing, stippled or some raster ops */

-#if CHAN_BITS != 8

-            USE(general_triangle);

-#else

-            USE(flat_rgba_triangle);

-#endif

-	 }

-      }

-   }

-   else if (ctx->RenderMode==GL_FEEDBACK) {

-      USE(_swrast_feedback_triangle);

-   }

-   else {

-      /* GL_SELECT mode */

-      USE(_swrast_select_triangle);

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.3
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * When the device driver doesn't implement triangle rasterization it
+ * can hook in _swrast_Triangle, which eventually calls one of these
+ * functions to draw triangles.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "main/state.h"
+#include "program/prog_instruction.h"
+
+#include "s_aatriangle.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_span.h"
+#include "s_triangle.h"
+
+
+/**
+ * Test if a triangle should be culled.  Used for feedback and selection mode.
+ * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise.
+ */
+GLboolean
+_swrast_culltriangle( struct gl_context *ctx,
+                      const SWvertex *v0,
+                      const SWvertex *v1,
+                      const SWvertex *v2 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+   GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+   GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+   GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+   GLfloat c = ex*fy-ey*fx;
+
+   if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F)
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+
+
+/*
+ * Render a flat-shaded RGBA triangle.
+ */
+#define NAME flat_rgba_triangle
+#define INTERP_Z 1
+#define SETUP_CODE				\
+   ASSERT(ctx->Texture._EnabledCoordUnits == 0);\
+   ASSERT(ctx->Light.ShadeModel==GL_FLAT);	\
+   span.interpMask |= SPAN_RGBA;		\
+   span.red = ChanToFixed(v2->color[0]);	\
+   span.green = ChanToFixed(v2->color[1]);	\
+   span.blue = ChanToFixed(v2->color[2]);	\
+   span.alpha = ChanToFixed(v2->color[3]);	\
+   span.redStep = 0;				\
+   span.greenStep = 0;				\
+   span.blueStep = 0;				\
+   span.alphaStep = 0;
+#define RENDER_SPAN( span )  _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render a smooth-shaded RGBA triangle.
+ */
+#define NAME smooth_rgba_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define SETUP_CODE				\
+   {						\
+      /* texturing must be off */		\
+      ASSERT(ctx->Texture._EnabledCoordUnits == 0);	\
+      ASSERT(ctx->Light.ShadeModel==GL_SMOOTH);	\
+   }
+#define RENDER_SPAN( span )  _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T only w/out mipmapping or perspective correction.
+ *
+ * No fog.  No depth testing.
+ */
+#define NAME simple_textured_triangle
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE							\
+   struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];	\
+   const struct gl_texture_object *obj = 				\
+      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\
+   const struct gl_texture_image *texImg =				\
+      obj->Image[0][obj->BaseLevel];					\
+   const GLfloat twidth = (GLfloat) texImg->Width;			\
+   const GLfloat theight = (GLfloat) texImg->Height;			\
+   const GLint twidth_log2 = texImg->WidthLog2;				\
+   const GLubyte *texture = (const GLubyte *) texImg->Data;		\
+   const GLint smask = texImg->Width - 1;				\
+   const GLint tmask = texImg->Height - 1;				\
+   ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888);			\
+   if (!rb || !texture) {						\
+      return;								\
+   }
+
+#define RENDER_SPAN( span )						\
+   GLuint i;								\
+   GLubyte rgb[MAX_WIDTH][3];						\
+   span.intTex[0] -= FIXED_HALF; /* off-by-one error? */		\
+   span.intTex[1] -= FIXED_HALF;					\
+   for (i = 0; i < span.end; i++) {					\
+      GLint s = FixedToInt(span.intTex[0]) & smask;			\
+      GLint t = FixedToInt(span.intTex[1]) & tmask;			\
+      GLint pos = (t << twidth_log2) + s;				\
+      pos = pos + pos + pos;  /* multiply by 3 */			\
+      rgb[i][RCOMP] = texture[pos+2];					\
+      rgb[i][GCOMP] = texture[pos+1];					\
+      rgb[i][BCOMP] = texture[pos+0];					\
+      span.intTex[0] += span.intTexStep[0];				\
+      span.intTex[1] += span.intTexStep[1];				\
+   }									\
+   rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL);
+
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T, GL_LESS depth test, w/out mipmapping or
+ * perspective correction.
+ * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)
+ *
+ * No fog.
+ */
+#define NAME simple_z_textured_triangle
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE							\
+   struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];	\
+   const struct gl_texture_object *obj = 				\
+      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\
+   const struct gl_texture_image *texImg = 				\
+       obj->Image[0][obj->BaseLevel]; 					\
+   const GLfloat twidth = (GLfloat) texImg->Width;			\
+   const GLfloat theight = (GLfloat) texImg->Height;			\
+   const GLint twidth_log2 = texImg->WidthLog2;				\
+   const GLubyte *texture = (const GLubyte *) texImg->Data;		\
+   const GLint smask = texImg->Width - 1;				\
+   const GLint tmask = texImg->Height - 1;				\
+   ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888);			\
+   if (!rb || !texture) {						\
+      return;								\
+   }
+
+#define RENDER_SPAN( span )						\
+   GLuint i;				    				\
+   GLubyte rgb[MAX_WIDTH][3];						\
+   span.intTex[0] -= FIXED_HALF; /* off-by-one error? */		\
+   span.intTex[1] -= FIXED_HALF;					\
+   for (i = 0; i < span.end; i++) {					\
+      const GLuint z = FixedToDepth(span.z);				\
+      if (z < zRow[i]) {						\
+         GLint s = FixedToInt(span.intTex[0]) & smask;			\
+         GLint t = FixedToInt(span.intTex[1]) & tmask;			\
+         GLint pos = (t << twidth_log2) + s;				\
+         pos = pos + pos + pos;  /* multiply by 3 */			\
+         rgb[i][RCOMP] = texture[pos+2];				\
+         rgb[i][GCOMP] = texture[pos+1];				\
+         rgb[i][BCOMP] = texture[pos+0];				\
+         zRow[i] = z;							\
+         span.array->mask[i] = 1;					\
+      }									\
+      else {								\
+         span.array->mask[i] = 0;					\
+      }									\
+      span.intTex[0] += span.intTexStep[0];				\
+      span.intTex[1] += span.intTexStep[1];				\
+      span.z += span.zStep;						\
+   }									\
+   rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask);
+
+#include "s_tritemp.h"
+
+
+#if CHAN_TYPE != GL_FLOAT
+
+struct affine_info
+{
+   GLenum filter;
+   GLenum format;
+   GLenum envmode;
+   GLint smask, tmask;
+   GLint twidth_log2;
+   const GLchan *texture;
+   GLfixed er, eg, eb, ea;
+   GLint tbytesline, tsize;
+};
+
+
+static INLINE GLint
+ilerp(GLint t, GLint a, GLint b)
+{
+   return a + ((t * (b - a)) >> FIXED_SHIFT);
+}
+
+static INLINE GLint
+ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11)
+{
+   const GLint temp0 = ilerp(ia, v00, v10);
+   const GLint temp1 = ilerp(ia, v01, v11);
+   return ilerp(ib, temp0, temp1);
+}
+
+
+/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA
+ * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD
+ * texture env modes.
+ */
+static INLINE void
+affine_span(struct gl_context *ctx, SWspan *span,
+            struct affine_info *info)
+{
+   GLchan sample[4];  /* the filtered texture sample */
+   const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+
+   /* Instead of defining a function for each mode, a test is done
+    * between the outer and inner loops. This is to reduce code size
+    * and complexity. Observe that an optimizing compiler kills
+    * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+    */
+
+#define NEAREST_RGB		\
+   sample[RCOMP] = tex00[2];	\
+   sample[GCOMP] = tex00[1];	\
+   sample[BCOMP] = tex00[0];	\
+   sample[ACOMP] = CHAN_MAX;
+
+#define LINEAR_RGB							\
+   sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+   sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+   sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
+   sample[ACOMP] = CHAN_MAX;
+
+#define NEAREST_RGBA  \
+   sample[RCOMP] = tex00[3];	\
+   sample[GCOMP] = tex00[2];	\
+   sample[BCOMP] = tex00[1];	\
+   sample[ACOMP] = tex00[0];
+
+#define LINEAR_RGBA							\
+   sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\
+   sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+   sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+   sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0])
+
+#define MODULATE							  \
+   dest[RCOMP] = span->red   * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+   dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+   dest[BCOMP] = span->blue  * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+   dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8)
+
+#define DECAL								\
+   dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red +		\
+               ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT))	\
+               >> (FIXED_SHIFT + 8);					\
+   dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green +		\
+               ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT))	\
+               >> (FIXED_SHIFT + 8);					\
+   dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue +		\
+               ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT))	\
+               >> (FIXED_SHIFT + 8);					\
+   dest[ACOMP] = FixedToInt(span->alpha)
+
+#define BLEND								\
+   dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red		\
+               + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8);	\
+   dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green		\
+               + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8);	\
+   dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue		\
+               + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8);	\
+   dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8)
+
+#define REPLACE  COPY_CHAN4(dest, sample)
+
+#define ADD								\
+   {									\
+      GLint rSum = FixedToInt(span->red)   + (GLint) sample[RCOMP];	\
+      GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP];	\
+      GLint bSum = FixedToInt(span->blue)  + (GLint) sample[BCOMP];	\
+      dest[RCOMP] = MIN2(rSum, CHAN_MAX);				\
+      dest[GCOMP] = MIN2(gSum, CHAN_MAX);				\
+      dest[BCOMP] = MIN2(bSum, CHAN_MAX);				\
+      dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \
+  }
+
+/* shortcuts */
+
+#define NEAREST_RGB_REPLACE		\
+   NEAREST_RGB;				\
+   dest[0] = sample[0];			\
+   dest[1] = sample[1];			\
+   dest[2] = sample[2];			\
+   dest[3] = FixedToInt(span->alpha);
+
+#define NEAREST_RGBA_REPLACE  \
+   dest[RCOMP] = tex00[3]; \
+   dest[GCOMP] = tex00[2]; \
+   dest[BCOMP] = tex00[1]; \
+   dest[ACOMP] = tex00[0]
+
+#define SPAN_NEAREST(DO_TEX, COMPS)					\
+	for (i = 0; i < span->end; i++) {				\
+           /* Isn't it necessary to use FixedFloor below?? */		\
+           GLint s = FixedToInt(span->intTex[0]) & info->smask;		\
+           GLint t = FixedToInt(span->intTex[1]) & info->tmask;		\
+           GLint pos = (t << info->twidth_log2) + s;			\
+           const GLchan *tex00 = info->texture + COMPS * pos;		\
+           DO_TEX;							\
+           span->red += span->redStep;					\
+	   span->green += span->greenStep;				\
+           span->blue += span->blueStep;				\
+	   span->alpha += span->alphaStep;				\
+	   span->intTex[0] += span->intTexStep[0];			\
+	   span->intTex[1] += span->intTexStep[1];			\
+           dest += 4;							\
+	}
+
+#define SPAN_LINEAR(DO_TEX, COMPS)					\
+	for (i = 0; i < span->end; i++) {				\
+           /* Isn't it necessary to use FixedFloor below?? */		\
+           const GLint s = FixedToInt(span->intTex[0]) & info->smask;	\
+           const GLint t = FixedToInt(span->intTex[1]) & info->tmask;	\
+           const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK;	\
+           const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK;	\
+           const GLint pos = (t << info->twidth_log2) + s;		\
+           const GLchan *tex00 = info->texture + COMPS * pos;		\
+           const GLchan *tex10 = tex00 + info->tbytesline;		\
+           const GLchan *tex01 = tex00 + COMPS;				\
+           const GLchan *tex11 = tex10 + COMPS;				\
+           if (t == info->tmask) {					\
+              tex10 -= info->tsize;					\
+              tex11 -= info->tsize;					\
+           }								\
+           if (s == info->smask) {					\
+              tex01 -= info->tbytesline;				\
+              tex11 -= info->tbytesline;				\
+           }								\
+           DO_TEX;							\
+           span->red += span->redStep;					\
+	   span->green += span->greenStep;				\
+           span->blue += span->blueStep;				\
+	   span->alpha += span->alphaStep;				\
+	   span->intTex[0] += span->intTexStep[0];			\
+	   span->intTex[1] += span->intTexStep[1];			\
+           dest += 4;							\
+	}
+
+
+   GLuint i;
+   GLchan *dest = span->array->rgba[0];
+
+   /* Disable tex units so they're not re-applied in swrast_write_rgba_span */
+   ctx->Texture._EnabledCoordUnits = 0x0;
+
+   span->intTex[0] -= FIXED_HALF;
+   span->intTex[1] -= FIXED_HALF;
+   switch (info->filter) {
+   case GL_NEAREST:
+      switch (info->format) {
+      case MESA_FORMAT_RGB888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+            break;
+         case GL_DECAL:
+         case GL_REPLACE:
+            SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+            break;
+         case GL_BLEND:
+            SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+            break;
+         case GL_ADD:
+            SPAN_NEAREST(NEAREST_RGB;ADD,3);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR");
+            return;
+         }
+         break;
+      case MESA_FORMAT_RGBA8888:
+         switch(info->envmode) {
+         case GL_MODULATE:
+            SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+            break;
+         case GL_DECAL:
+            SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+            break;
+         case GL_BLEND:
+            SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+            break;
+         case GL_ADD:
+            SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+            break;
+         case GL_REPLACE:
+            SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      }
+      break;
+
+   case GL_LINEAR:
+      span->intTex[0] -= FIXED_HALF;
+      span->intTex[1] -= FIXED_HALF;
+      switch (info->format) {
+      case MESA_FORMAT_RGB888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+            break;
+         case GL_DECAL:
+         case GL_REPLACE:
+            SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+            break;
+         case GL_BLEND:
+            SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+            break;
+         case GL_ADD:
+            SPAN_LINEAR(LINEAR_RGB;ADD,3);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      case MESA_FORMAT_RGBA8888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+            break;
+         case GL_DECAL:
+            SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+            break;
+         case GL_BLEND:
+            SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+            break;
+         case GL_ADD:
+            SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+            break;
+         case GL_REPLACE:
+            SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      }
+      break;
+   }
+   span->interpMask &= ~SPAN_RGBA;
+   ASSERT(span->arrayMask & SPAN_RGBA);
+
+   _swrast_write_rgba_span(ctx, span);
+
+   /* re-enable texture units */
+   ctx->Texture._EnabledCoordUnits = texEnableSave;
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+}
+
+
+
+/*
+ * Render an RGB/RGBA textured triangle without perspective correction.
+ */
+#define NAME affine_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE							\
+   struct affine_info info;						\
+   struct gl_texture_unit *unit = ctx->Texture.Unit+0;			\
+   const struct gl_texture_object *obj = 				\
+      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\
+   const struct gl_texture_image *texImg = 				\
+      obj->Image[0][obj->BaseLevel]; 					\
+   const GLfloat twidth = (GLfloat) texImg->Width;			\
+   const GLfloat theight = (GLfloat) texImg->Height;			\
+   info.texture = (const GLchan *) texImg->Data;			\
+   info.twidth_log2 = texImg->WidthLog2;				\
+   info.smask = texImg->Width - 1;					\
+   info.tmask = texImg->Height - 1;					\
+   info.format = texImg->TexFormat;					\
+   info.filter = obj->Sampler.MinFilter;				\
+   info.envmode = unit->EnvMode;					\
+   info.er = 0;					\
+   info.eg = 0;					\
+   info.eb = 0;					\
+   span.arrayMask |= SPAN_RGBA;						\
+									\
+   if (info.envmode == GL_BLEND) {					\
+      /* potential off-by-one error here? (1.0f -> 2048 -> 0) */	\
+      info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF);	\
+      info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF);	\
+      info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF);	\
+      info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF);	\
+   }									\
+   if (!info.texture) {							\
+      /* this shouldn't happen */					\
+      return;								\
+   }									\
+									\
+   switch (info.format) {						\
+   case MESA_FORMAT_RGB888:						\
+      info.tbytesline = texImg->Width * 3;				\
+      break;								\
+   case MESA_FORMAT_RGBA8888:						\
+      info.tbytesline = texImg->Width * 4;				\
+      break;								\
+   default:								\
+      _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\
+      return;								\
+   }									\
+   info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span )   affine_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+
+
+struct persp_info
+{
+   GLenum filter;
+   GLenum format;
+   GLenum envmode;
+   GLint smask, tmask;
+   GLint twidth_log2;
+   const GLchan *texture;
+   GLfixed er, eg, eb, ea;   /* texture env color */
+   GLint tbytesline, tsize;
+};
+
+
+static INLINE void
+fast_persp_span(struct gl_context *ctx, SWspan *span,
+		struct persp_info *info)
+{
+   GLchan sample[4];  /* the filtered texture sample */
+
+  /* Instead of defining a function for each mode, a test is done
+   * between the outer and inner loops. This is to reduce code size
+   * and complexity. Observe that an optimizing compiler kills
+   * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+   */
+#define SPAN_NEAREST(DO_TEX,COMP)					\
+	for (i = 0; i < span->end; i++) {				\
+           GLdouble invQ = tex_coord[2] ?				\
+                                 (1.0 / tex_coord[2]) : 1.0;            \
+           GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ);		\
+           GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ);		\
+           GLint s = IFLOOR(s_tmp) & info->smask;	        	\
+           GLint t = IFLOOR(t_tmp) & info->tmask;	        	\
+           GLint pos = (t << info->twidth_log2) + s;			\
+           const GLchan *tex00 = info->texture + COMP * pos;		\
+           DO_TEX;							\
+           span->red += span->redStep;					\
+	   span->green += span->greenStep;				\
+           span->blue += span->blueStep;				\
+	   span->alpha += span->alphaStep;				\
+	   tex_coord[0] += tex_step[0];					\
+	   tex_coord[1] += tex_step[1];					\
+	   tex_coord[2] += tex_step[2];					\
+           dest += 4;							\
+	}
+
+#define SPAN_LINEAR(DO_TEX,COMP)					\
+	for (i = 0; i < span->end; i++) {				\
+           GLdouble invQ = tex_coord[2] ?				\
+                                 (1.0 / tex_coord[2]) : 1.0;            \
+           const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ);	\
+           const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ);	\
+           const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF;	\
+           const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF;      \
+           const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask;	\
+           const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask;	\
+           const GLfixed sf = s_fix & FIXED_FRAC_MASK;			\
+           const GLfixed tf = t_fix & FIXED_FRAC_MASK;			\
+           const GLint pos = (t << info->twidth_log2) + s;		\
+           const GLchan *tex00 = info->texture + COMP * pos;		\
+           const GLchan *tex10 = tex00 + info->tbytesline;		\
+           const GLchan *tex01 = tex00 + COMP;				\
+           const GLchan *tex11 = tex10 + COMP;				\
+           if (t == info->tmask) {					\
+              tex10 -= info->tsize;					\
+              tex11 -= info->tsize;					\
+           }								\
+           if (s == info->smask) {					\
+              tex01 -= info->tbytesline;				\
+              tex11 -= info->tbytesline;				\
+           }								\
+           DO_TEX;							\
+           span->red   += span->redStep;				\
+	   span->green += span->greenStep;				\
+           span->blue  += span->blueStep;				\
+	   span->alpha += span->alphaStep;				\
+	   tex_coord[0] += tex_step[0];					\
+	   tex_coord[1] += tex_step[1];					\
+	   tex_coord[2] += tex_step[2];					\
+           dest += 4;							\
+	}
+
+   GLuint i;
+   GLfloat tex_coord[3], tex_step[3];
+   GLchan *dest = span->array->rgba[0];
+
+   const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+   ctx->Texture._EnabledCoordUnits = 0;
+
+   tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0]  * (info->smask + 1);
+   tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
+   tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+   tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+   /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */
+   tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3];
+   tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3];
+
+   switch (info->filter) {
+   case GL_NEAREST:
+      switch (info->format) {
+      case MESA_FORMAT_RGB888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+            break;
+         case GL_DECAL:
+         case GL_REPLACE:
+            SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+            break;
+         case GL_BLEND:
+            SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+            break;
+         case GL_ADD:
+            SPAN_NEAREST(NEAREST_RGB;ADD,3);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      case MESA_FORMAT_RGBA8888:
+         switch(info->envmode) {
+         case GL_MODULATE:
+            SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+            break;
+         case GL_DECAL:
+            SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+            break;
+         case GL_BLEND:
+            SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+            break;
+         case GL_ADD:
+            SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+            break;
+         case GL_REPLACE:
+            SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      }
+      break;
+
+   case GL_LINEAR:
+      switch (info->format) {
+      case MESA_FORMAT_RGB888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+            break;
+         case GL_DECAL:
+         case GL_REPLACE:
+            SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+            break;
+         case GL_BLEND:
+            SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+            break;
+         case GL_ADD:
+            SPAN_LINEAR(LINEAR_RGB;ADD,3);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      case MESA_FORMAT_RGBA8888:
+         switch (info->envmode) {
+         case GL_MODULATE:
+            SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+            break;
+         case GL_DECAL:
+            SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+            break;
+         case GL_BLEND:
+            SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+            break;
+         case GL_ADD:
+            SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+            break;
+         case GL_REPLACE:
+            SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+            break;
+         default:
+            _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR");
+            return;
+         }
+         break;
+      }
+      break;
+   }
+   
+   ASSERT(span->arrayMask & SPAN_RGBA);
+   _swrast_write_rgba_span(ctx, span);
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+
+   /* restore state */
+   ctx->Texture._EnabledCoordUnits = texEnableSave;
+}
+
+
+/*
+ * Render an perspective corrected RGB/RGBA textured triangle.
+ * The Q (aka V in Mesa) coordinate must be zero such that the divide
+ * by interpolated Q/W comes out right.
+ *
+ */
+#define NAME persp_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+
+#define SETUP_CODE							\
+   struct persp_info info;						\
+   const struct gl_texture_unit *unit = ctx->Texture.Unit+0;		\
+   const struct gl_texture_object *obj = 				\
+      ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];		\
+   const struct gl_texture_image *texImg = 				\
+      obj->Image[0][obj->BaseLevel];			 		\
+   info.texture = (const GLchan *) texImg->Data;			\
+   info.twidth_log2 = texImg->WidthLog2;				\
+   info.smask = texImg->Width - 1;					\
+   info.tmask = texImg->Height - 1;					\
+   info.format = texImg->TexFormat;					\
+   info.filter = obj->Sampler.MinFilter;				\
+   info.envmode = unit->EnvMode;					\
+   info.er = 0;					\
+   info.eg = 0;					\
+   info.eb = 0;					\
+									\
+   if (info.envmode == GL_BLEND) {					\
+      /* potential off-by-one error here? (1.0f -> 2048 -> 0) */	\
+      info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF);	\
+      info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF);	\
+      info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF);	\
+      info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF);	\
+   }									\
+   if (!info.texture) {							\
+      /* this shouldn't happen */					\
+      return;								\
+   }									\
+									\
+   switch (info.format) {						\
+   case MESA_FORMAT_RGB888:						\
+      info.tbytesline = texImg->Width * 3;				\
+      break;								\
+   case MESA_FORMAT_RGBA8888:						\
+      info.tbytesline = texImg->Width * 4;				\
+      break;								\
+   default:								\
+      _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\
+      return;								\
+   }									\
+   info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span )			\
+   span.interpMask &= ~SPAN_RGBA;		\
+   span.arrayMask |= SPAN_RGBA;			\
+   fast_persp_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+#endif /*CHAN_TYPE != GL_FLOAT*/
+
+
+
+/*
+ * Render an RGBA triangle with arbitrary attributes.
+ */
+#define NAME general_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+#define RENDER_SPAN( span )   _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+
+/*
+ * Special tri function for occlusion testing
+ */
+#define NAME occlusion_zless_triangle
+#define INTERP_Z 1
+#define SETUP_CODE							\
+   struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer;		\
+   struct gl_query_object *q = ctx->Query.CurrentOcclusionObject;	\
+   ASSERT(ctx->Depth.Test);						\
+   ASSERT(!ctx->Depth.Mask);						\
+   ASSERT(ctx->Depth.Func == GL_LESS);					\
+   if (!q) {								\
+      return;								\
+   }
+#define RENDER_SPAN( span )						\
+   if (rb->Format == MESA_FORMAT_Z16) {					\
+      GLuint i;								\
+      const GLushort *zRow = (const GLushort *)				\
+         rb->GetPointer(ctx, rb, span.x, span.y);			\
+      for (i = 0; i < span.end; i++) {					\
+         GLuint z = FixedToDepth(span.z);				\
+         if (z < zRow[i]) {						\
+            q->Result++;						\
+         }								\
+         span.z += span.zStep;						\
+      }									\
+   }									\
+   else {								\
+      GLuint i;								\
+      const GLuint *zRow = (const GLuint *)				\
+         rb->GetPointer(ctx, rb, span.x, span.y);			\
+      for (i = 0; i < span.end; i++) {					\
+         if ((GLuint)span.z < zRow[i]) {				\
+            q->Result++;						\
+         }								\
+         span.z += span.zStep;						\
+      }									\
+   }
+#include "s_tritemp.h"
+
+
+
+static void
+nodraw_triangle( struct gl_context *ctx,
+                 const SWvertex *v0,
+                 const SWvertex *v1,
+                 const SWvertex *v2 )
+{
+   (void) (ctx && v0 && v1 && v2);
+}
+
+
+/*
+ * This is used when separate specular color is enabled, but not
+ * texturing.  We add the specular color to the primary color,
+ * draw the triangle, then restore the original primary color.
+ * Inefficient, but seldom needed.
+ */
+void
+_swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0,
+                                const SWvertex *v1, const SWvertex *v2)
+{
+   SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */
+   SWvertex *ncv1 = (SWvertex *)v1;
+   SWvertex *ncv2 = (SWvertex *)v2;
+   GLfloat rSum, gSum, bSum;
+   GLchan cSave[3][4];
+
+   /* save original colors */
+   COPY_CHAN4( cSave[0], ncv0->color );
+   COPY_CHAN4( cSave[1], ncv1->color );
+   COPY_CHAN4( cSave[2], ncv2->color );
+   /* sum v0 */
+   rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
+   gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
+   bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
+   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
+   /* sum v1 */
+   rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
+   gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
+   bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
+   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
+   /* sum v2 */
+   rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0];
+   gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1];
+   bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2];
+   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum);
+   UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum);
+   /* draw */
+   SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );
+   /* restore original colors */
+   COPY_CHAN4( ncv0->color, cSave[0] );
+   COPY_CHAN4( ncv1->color, cSave[1] );
+   COPY_CHAN4( ncv2->color, cSave[2] );
+}
+
+
+
+#ifdef DEBUG
+
+/* record the current triangle function name */
+const char *_mesa_triFuncName = NULL;
+
+#define USE(triFunc)				\
+do {						\
+    _mesa_triFuncName = #triFunc;		\
+    /*printf("%s\n", _mesa_triFuncName);*/	\
+    swrast->Triangle = triFunc;			\
+} while (0)
+
+#else
+
+#define USE(triFunc)  swrast->Triangle = triFunc;
+
+#endif
+
+
+
+
+/*
+ * Determine which triangle rendering function to use given the current
+ * rendering context.
+ *
+ * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or
+ * remove tests to this code.
+ */
+void
+_swrast_choose_triangle( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (ctx->Polygon.CullFlag &&
+       ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) {
+      USE(nodraw_triangle);
+      return;
+   }
+
+   if (ctx->RenderMode==GL_RENDER) {
+
+      if (ctx->Polygon.SmoothFlag) {
+         _swrast_set_aa_triangle_function(ctx);
+         ASSERT(swrast->Triangle);
+         return;
+      }
+
+      /* special case for occlusion testing */
+      if (ctx->Query.CurrentOcclusionObject &&
+          ctx->Depth.Test &&
+          ctx->Depth.Mask == GL_FALSE &&
+          ctx->Depth.Func == GL_LESS &&
+          !ctx->Stencil._Enabled) {
+         if (ctx->Color.ColorMask[0][0] == 0 &&
+	     ctx->Color.ColorMask[0][1] == 0 &&
+	     ctx->Color.ColorMask[0][2] == 0 &&
+	     ctx->Color.ColorMask[0][3] == 0) {
+            USE(occlusion_zless_triangle);
+            return;
+         }
+      }
+
+      /*
+       * XXX should examine swrast->_ActiveAttribMask to determine what
+       * needs to be interpolated.
+       */
+      if (ctx->Texture._EnabledCoordUnits ||
+          ctx->FragmentProgram._Current ||
+          ctx->ATIFragmentShader._Enabled ||
+          _mesa_need_secondary_color(ctx) ||
+          swrast->_FogEnabled) {
+         /* Ugh, we do a _lot_ of tests to pick the best textured tri func */
+         const struct gl_texture_object *texObj2D;
+         const struct gl_texture_image *texImg;
+         GLenum minFilter, magFilter, envMode;
+         gl_format format;
+         texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
+
+         texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;
+         format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE;
+         minFilter = texObj2D ? texObj2D->Sampler.MinFilter : GL_NONE;
+         magFilter = texObj2D ? texObj2D->Sampler.MagFilter : GL_NONE;
+         envMode = ctx->Texture.Unit[0].EnvMode;
+
+         /* First see if we can use an optimized 2-D texture function */
+         if (ctx->Texture._EnabledCoordUnits == 0x1
+             && !ctx->FragmentProgram._Current
+             && !ctx->ATIFragmentShader._Enabled
+             && ctx->Texture._EnabledUnits == 0x1
+             && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT
+             && texObj2D->Sampler.WrapS == GL_REPEAT
+             && texObj2D->Sampler.WrapT == GL_REPEAT
+             && texObj2D->_Swizzle == SWIZZLE_NOOP
+             && texImg->_IsPowerOfTwo
+             && texImg->Border == 0
+             && texImg->Width == texImg->RowStride
+             && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888)
+             && minFilter == magFilter
+             && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR
+             && !swrast->_FogEnabled
+             && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT
+             && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) {
+	    if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {
+	       if (minFilter == GL_NEAREST
+		   && format == MESA_FORMAT_RGB888
+		   && (envMode == GL_REPLACE || envMode == GL_DECAL)
+		   && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)
+			&& ctx->Depth.Func == GL_LESS
+			&& ctx->Depth.Mask == GL_TRUE)
+		       || swrast->_RasterMask == TEXTURE_BIT)
+		   && ctx->Polygon.StippleFlag == GL_FALSE
+                   && ctx->DrawBuffer->Visual.depthBits <= 16) {
+		  if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
+		     USE(simple_z_textured_triangle);
+		  }
+		  else {
+		     USE(simple_textured_triangle);
+		  }
+	       }
+	       else {
+#if CHAN_BITS != 8
+                  USE(general_triangle);
+#else
+                  if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) {
+                     /* We only handle RGBA8888 correctly on little endian
+                      * in the optimized code above.
+                      */
+                     USE(general_triangle);
+                  }
+                  else {
+                     USE(affine_textured_triangle);
+                 }
+#endif
+	       }
+	    }
+	    else {
+#if CHAN_BITS != 8
+               USE(general_triangle);
+#else
+               USE(persp_textured_triangle);
+#endif
+	    }
+	 }
+         else {
+            /* general case textured triangles */
+            USE(general_triangle);
+         }
+      }
+      else {
+         ASSERT(!swrast->_FogEnabled);
+         ASSERT(!_mesa_need_secondary_color(ctx));
+	 if (ctx->Light.ShadeModel==GL_SMOOTH) {
+	    /* smooth shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+               USE(general_triangle);
+#else
+               USE(smooth_rgba_triangle);
+#endif
+	 }
+	 else {
+	    /* flat shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+            USE(general_triangle);
+#else
+            USE(flat_rgba_triangle);
+#endif
+	 }
+      }
+   }
+   else if (ctx->RenderMode==GL_FEEDBACK) {
+      USE(_swrast_feedback_triangle);
+   }
+   else {
+      /* GL_SELECT mode */
+      USE(_swrast_select_triangle);
+   }
+}