xserver libX11 libxtrans mesa pixman xkeyboard-config git update 27 Apr 2011

6 files changed, 2160 insertions, 2153 deletions

diff --git a/mesalib/src/mesa/swrast/s_accum.c b/mesalib/src/mesa/swrast/s_accum.c
index 560a1d143..0ec907d79 100644
--- a/mesalib/src/mesa/swrast/s_accum.c
+++ b/mesalib/src/mesa/swrast/s_accum.c
@@ -1,594 +1,598 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5.2

- *

- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.

- *

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

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

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

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

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

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

- *

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

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

- *

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

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

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

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

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

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

- */

-

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/macros.h"

-#include "main/imports.h"

-

-#include "s_accum.h"

-#include "s_context.h"

-#include "s_masking.h"

-#include "s_span.h"

-

-

-/* XXX this would have to change for accum buffers with more or less

- * than 16 bits per color channel.

- */

-#define ACCUM_SCALE16 32767.0F

-

-

-/*

- * Accumulation buffer notes

- *

- * Normally, accumulation buffer values are GLshorts with values in

- * [-32767, 32767] which represent floating point colors in [-1, 1],

- * as defined by the OpenGL specification.

- *

- * We optimize for the common case used for full-scene antialiasing:

- *    // start with accum buffer cleared to zero

- *    glAccum(GL_LOAD, w);   // or GL_ACCUM the first image

- *    glAccum(GL_ACCUM, w);

- *    ...

- *    glAccum(GL_ACCUM, w);

- *    glAccum(GL_RETURN, 1.0);

- * That is, we start with an empty accumulation buffer and accumulate

- * n images, each with weight w = 1/n.

- * In this scenario, we can simply store unscaled integer values in

- * the accum buffer instead of scaled integers.  We'll also keep track

- * of the w value so when we do GL_RETURN we simply divide the accumulated

- * values by n (n=1/w).

- * This lets us avoid _many_ int->float->int conversions.

- */

-

-

-#if CHAN_BITS == 8

-/* enable the optimization */

-#define USE_OPTIMIZED_ACCUM  1

-#else

-#define USE_OPTIMIZED_ACCUM  0

-#endif

-

-

-/**

- * This is called when we fall out of optimized/unscaled accum buffer mode.

- * That is, we convert each unscaled accum buffer value into a scaled value

- * representing the range[-1, 1].

- */

-static void

-rescale_accum( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_renderbuffer *rb

-      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;

-   const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);

-

-   assert(rb);

-   assert(rb->_BaseFormat == GL_RGBA);

-   /* add other types in future? */

-   assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);

-   assert(swrast->_IntegerAccumMode);

-

-   if (rb->GetPointer(ctx, rb, 0, 0)) {

-      /* directly-addressable memory */

-      GLuint y;

-      for (y = 0; y < rb->Height; y++) {

-         GLuint i;

-         GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);

-         for (i = 0; i < 4 * rb->Width; i++) {

-            acc[i] = (GLshort) (acc[i] * s);

-         }

-      }

-   }

-   else {

-      /* use get/put row funcs */

-      GLuint y;

-      for (y = 0; y < rb->Height; y++) {

-         GLshort accRow[MAX_WIDTH * 4];

-         GLuint i;

-         rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);

-         for (i = 0; i < 4 * rb->Width; i++) {

-            accRow[i] = (GLshort) (accRow[i] * s);

-         }

-         rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);

-      }

-   }

-

-   swrast->_IntegerAccumMode = GL_FALSE;

-}

-

-

-

-/**

- * Clear the accumulation Buffer.

- */

-void

-_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint x, y, width, height;

-

-   /* No accumulation buffer! Not an error. */

-   if (!rb || !rb->Data)

-      return;

-

-   assert(rb->_BaseFormat == GL_RGBA);

-   /* add other types in future? */

-   assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);

-

-   /* bounds, with scissor */

-   x = ctx->DrawBuffer->_Xmin;

-   y = ctx->DrawBuffer->_Ymin;

-   width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;

-   height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;

-

-   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {

-      const GLfloat accScale = 32767.0;

-      GLshort clearVal[4];

-      GLuint i;

-

-      clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);

-      clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);

-      clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);

-      clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);

-

-      for (i = 0; i < height; i++) {

-         rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);

-      }

-   }

-   else {

-      /* someday support other sizes */

-   }

-

-   /* update optimized accum state vars */

-   if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&

-       ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {

-#if USE_OPTIMIZED_ACCUM

-      swrast->_IntegerAccumMode = GL_TRUE;

-#else

-      swrast->_IntegerAccumMode = GL_FALSE;

-#endif

-      swrast->_IntegerAccumScaler = 0.0;  /* denotes empty accum buffer */

-   }

-   else {

-      swrast->_IntegerAccumMode = GL_FALSE;

-   }

-}

-

-

-static void

-accum_add(struct gl_context *ctx, GLfloat value,

-          GLint xpos, GLint ypos, GLint width, GLint height )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_renderbuffer *rb

-      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;

-

-   assert(rb);

-

-   /* Leave optimized accum buffer mode */

-   if (swrast->_IntegerAccumMode)

-      rescale_accum(ctx);

-

-   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {

-      const GLshort incr = (GLshort) (value * ACCUM_SCALE16);

-      if (rb->GetPointer(ctx, rb, 0, 0)) {

-         GLint i, j;

-         for (i = 0; i < height; i++) {

-            GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);

-            for (j = 0; j < 4 * width; j++) {

-               acc[j] += incr;

-            }

-         }

-      }

-      else {

-         GLint i, j;

-         for (i = 0; i < height; i++) {

-            GLshort accRow[4 * MAX_WIDTH];

-            rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);

-            for (j = 0; j < 4 * width; j++) {

-               accRow[j] += incr;

-            }

-            rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);

-         }

-      }

-   }

-   else {

-      /* other types someday */

-   }

-}

-

-

-static void

-accum_mult(struct gl_context *ctx, GLfloat mult,

-           GLint xpos, GLint ypos, GLint width, GLint height )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_renderbuffer *rb

-      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;

-

-   assert(rb);

-

-   /* Leave optimized accum buffer mode */

-   if (swrast->_IntegerAccumMode)

-      rescale_accum(ctx);

-

-   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {

-      if (rb->GetPointer(ctx, rb, 0, 0)) {

-         GLint i, j;

-         for (i = 0; i < height; i++) {

-            GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);

-            for (j = 0; j < 4 * width; j++) {

-               acc[j] = (GLshort) (acc[j] * mult);

-            }

-         }

-      }

-      else {

-         GLint i, j;

-         for (i = 0; i < height; i++) {

-            GLshort accRow[4 * MAX_WIDTH];

-            rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);

-            for (j = 0; j < 4 * width; j++) {

-               accRow[j] = (GLshort) (accRow[j] * mult);

-            }

-            rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);

-         }

-      }

-   }

-   else {

-      /* other types someday */

-   }

-}

-

-

-

-static void

-accum_accum(struct gl_context *ctx, GLfloat value,

-            GLint xpos, GLint ypos, GLint width, GLint height )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_renderbuffer *rb

-      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;

-   const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);

-

-   assert(rb);

-

-   if (!ctx->ReadBuffer->_ColorReadBuffer) {

-      /* no read buffer - OK */

-      return;

-   }

-

-   /* May have to leave optimized accum buffer mode */

-   if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)

-      swrast->_IntegerAccumScaler = value;

-   if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)

-      rescale_accum(ctx);

-

-   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {

-      const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;

-      GLshort accumRow[4 * MAX_WIDTH];

-      GLchan rgba[MAX_WIDTH][4];

-      GLint i;

-

-      for (i = 0; i < height; i++) {

-         GLshort *acc;

-         if (directAccess) {

-            acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);

-         }

-         else {

-            rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);

-            acc = accumRow;

-         }

-

-         /* read colors from color buffer */

-         _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,

-                                xpos, ypos + i, CHAN_TYPE, rgba);

-

-         /* do accumulation */

-         if (swrast->_IntegerAccumMode) {

-            /* simply add integer color values into accum buffer */

-            GLint j;

-            for (j = 0; j < width; j++) {

-               acc[j * 4 + 0] += rgba[j][RCOMP];

-               acc[j * 4 + 1] += rgba[j][GCOMP];

-               acc[j * 4 + 2] += rgba[j][BCOMP];

-               acc[j * 4 + 3] += rgba[j][ACOMP];

-            }

-         }

-         else {

-            /* scaled integer (or float) accum buffer */

-            GLint j;

-            for (j = 0; j < width; j++) {

-               acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);

-               acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);

-               acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);

-               acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);

-            }

-         }

-

-         if (!directAccess) {

-            rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);

-         }

-      }

-   }

-   else {

-      /* other types someday */

-   }

-}

-

-

-

-static void

-accum_load(struct gl_context *ctx, GLfloat value,

-           GLint xpos, GLint ypos, GLint width, GLint height )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_renderbuffer *rb

-      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;

-   const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);

-

-   assert(rb);

-

-   if (!ctx->ReadBuffer->_ColorReadBuffer) {

-      /* no read buffer - OK */

-      return;

-   }

-

-   /* This is a change to go into optimized accum buffer mode */

-   if (value > 0.0 && value <= 1.0) {

-#if USE_OPTIMIZED_ACCUM

-      swrast->_IntegerAccumMode = GL_TRUE;

-#else

-      swrast->_IntegerAccumMode = GL_FALSE;

-#endif

-      swrast->_IntegerAccumScaler = value;

-   }

-   else {

-      swrast->_IntegerAccumMode = GL_FALSE;

-      swrast->_IntegerAccumScaler = 0.0;

-   }

-

-   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {

-      const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;

-      GLshort accumRow[4 * MAX_WIDTH];

-      GLchan rgba[MAX_WIDTH][4];

-      GLint i;

-

-      for (i = 0; i < height; i++) {

-         GLshort *acc;

-         if (directAccess) {

-            acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);

-         }

-         else {

-            rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);

-            acc = accumRow;

-         }

-

-         /* read colors from color buffer */

-         _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,

-                                xpos, ypos + i, CHAN_TYPE, rgba);

-

-         /* do load */

-         if (swrast->_IntegerAccumMode) {

-            /* just copy values in */

-            GLint j;

-            assert(swrast->_IntegerAccumScaler > 0.0);

-            assert(swrast->_IntegerAccumScaler <= 1.0);

-            for (j = 0; j < width; j++) {

-               acc[j * 4 + 0] = rgba[j][RCOMP];

-               acc[j * 4 + 1] = rgba[j][GCOMP];

-               acc[j * 4 + 2] = rgba[j][BCOMP];

-               acc[j * 4 + 3] = rgba[j][ACOMP];

-            }

-         }

-         else {

-            /* scaled integer (or float) accum buffer */

-            GLint j;

-            for (j = 0; j < width; j++) {

-               acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);

-               acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);

-               acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);

-               acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);

-            }

-         }

-

-         if (!directAccess) {

-            rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);

-         }

-      }

-   }

-}

-

-

-static void

-accum_return(struct gl_context *ctx, GLfloat value,

-             GLint xpos, GLint ypos, GLint width, GLint height )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   struct gl_framebuffer *fb = ctx->DrawBuffer;

-   struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;

-   const GLboolean directAccess

-      = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);

-

-   static GLchan multTable[32768];

-   static GLfloat prevMult = 0.0;

-   const GLfloat mult = swrast->_IntegerAccumScaler;

-   const GLint max = MIN2((GLint) (256 / mult), 32767);

-

-   /* May have to leave optimized accum buffer mode */

-   if (swrast->_IntegerAccumMode && value != 1.0)

-      rescale_accum(ctx);

-

-   if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {

-      /* build lookup table to avoid many floating point multiplies */

-      GLint j;

-      assert(swrast->_IntegerAccumScaler <= 1.0);

-      if (mult != prevMult) {

-         for (j = 0; j < max; j++)

-            multTable[j] = IROUND((GLfloat) j * mult);

-         prevMult = mult;

-      }

-   }

-

-   if (accumRb->DataType == GL_SHORT ||

-       accumRb->DataType == GL_UNSIGNED_SHORT) {

-      const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;

-      GLuint buffer;

-      GLint i;

-

-      /* XXX maybe transpose the 'i' and 'buffer' loops??? */

-      for (i = 0; i < height; i++) {

-         GLshort accumRow[4 * MAX_WIDTH];

-         GLshort *acc;

-         SWspan span;

-

-         /* init color span */

-         INIT_SPAN(span, GL_BITMAP);

-         span.end = width;

-         span.arrayMask = SPAN_RGBA;

-         span.x = xpos;

-         span.y = ypos + i;

-

-         if (directAccess) {

-            acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);

-         }

-         else {

-            accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);

-            acc = accumRow;

-         }

-

-         /* get the colors to return */

-         if (swrast->_IntegerAccumMode) {

-            GLint j;

-            for (j = 0; j < width; j++) {

-               ASSERT(acc[j * 4 + 0] < max);

-               ASSERT(acc[j * 4 + 1] < max);

-               ASSERT(acc[j * 4 + 2] < max);

-               ASSERT(acc[j * 4 + 3] < max);

-               span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];

-               span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];

-               span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];

-               span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];

-            }

-         }

-         else {

-            /* scaled integer (or float) accum buffer */

-            GLint j;

-            for (j = 0; j < width; j++) {

-#if CHAN_BITS==32

-               GLchan r = acc[j * 4 + 0] * scale;

-               GLchan g = acc[j * 4 + 1] * scale;

-               GLchan b = acc[j * 4 + 2] * scale;

-               GLchan a = acc[j * 4 + 3] * scale;

-#else

-               GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );

-               GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );

-               GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );

-               GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );

-#endif

-               span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );

-               span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );

-               span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );

-               span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );

-            }

-         }

-

-         /* store colors */

-         for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {

-            struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];

-            const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||

-                                       !ctx->Color.ColorMask[buffer][GCOMP] ||

-                                       !ctx->Color.ColorMask[buffer][BCOMP] ||

-                                       !ctx->Color.ColorMask[buffer][ACOMP]);

-            if (masking) {

-               _swrast_mask_rgba_span(ctx, rb, &span, buffer);

-            }

-            rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);

-         }

-      }

-   }

-   else {

-      /* other types someday */

-   }

-}

-

-

-

-/**

- * Software fallback for glAccum.

- */

-void

-_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLint xpos, ypos, width, height;

-

-   if (swrast->NewState)

-      _swrast_validate_derived( ctx );

-

-   if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {

-      _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");

-      return;

-   }

-

-   swrast_render_start(ctx);

-

-   /* Compute region after calling swrast_render_start() so that we know the

-    * drawbuffer's size/bounds are up to date.

-    */

-   xpos = ctx->DrawBuffer->_Xmin;

-   ypos = ctx->DrawBuffer->_Ymin;

-   width =  ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;

-   height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;

-

-   switch (op) {

-      case GL_ADD:

-         if (value != 0.0F) {

-            accum_add(ctx, value, xpos, ypos, width, height);

-	 }

-	 break;

-      case GL_MULT:

-         if (value != 1.0F) {

-            accum_mult(ctx, value, xpos, ypos, width, height);

-	 }

-	 break;

-      case GL_ACCUM:

-         if (value != 0.0F) {

-            accum_accum(ctx, value, xpos, ypos, width, height);

-         }

-	 break;

-      case GL_LOAD:

-         accum_load(ctx, value, xpos, ypos, width, height);

-	 break;

-      case GL_RETURN:

-         accum_return(ctx, value, xpos, ypos, width, height);

-	 break;

-      default:

-         _mesa_problem(ctx, "invalid mode in _swrast_Accum()");

-         break;

-   }

-

-   swrast_render_finish(ctx);

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.2
+ *
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/condrender.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+
+#include "s_accum.h"
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+/* XXX this would have to change for accum buffers with more or less
+ * than 16 bits per color channel.
+ */
+#define ACCUM_SCALE16 32767.0F
+
+
+/*
+ * Accumulation buffer notes
+ *
+ * Normally, accumulation buffer values are GLshorts with values in
+ * [-32767, 32767] which represent floating point colors in [-1, 1],
+ * as defined by the OpenGL specification.
+ *
+ * We optimize for the common case used for full-scene antialiasing:
+ *    // start with accum buffer cleared to zero
+ *    glAccum(GL_LOAD, w);   // or GL_ACCUM the first image
+ *    glAccum(GL_ACCUM, w);
+ *    ...
+ *    glAccum(GL_ACCUM, w);
+ *    glAccum(GL_RETURN, 1.0);
+ * That is, we start with an empty accumulation buffer and accumulate
+ * n images, each with weight w = 1/n.
+ * In this scenario, we can simply store unscaled integer values in
+ * the accum buffer instead of scaled integers.  We'll also keep track
+ * of the w value so when we do GL_RETURN we simply divide the accumulated
+ * values by n (n=1/w).
+ * This lets us avoid _many_ int->float->int conversions.
+ */
+
+
+#if CHAN_BITS == 8
+/* enable the optimization */
+#define USE_OPTIMIZED_ACCUM  1
+#else
+#define USE_OPTIMIZED_ACCUM  0
+#endif
+
+
+/**
+ * This is called when we fall out of optimized/unscaled accum buffer mode.
+ * That is, we convert each unscaled accum buffer value into a scaled value
+ * representing the range[-1, 1].
+ */
+static void
+rescale_accum( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_renderbuffer *rb
+      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+   const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);
+
+   assert(rb);
+   assert(rb->_BaseFormat == GL_RGBA);
+   /* add other types in future? */
+   assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+   assert(swrast->_IntegerAccumMode);
+
+   if (rb->GetPointer(ctx, rb, 0, 0)) {
+      /* directly-addressable memory */
+      GLuint y;
+      for (y = 0; y < rb->Height; y++) {
+         GLuint i;
+         GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);
+         for (i = 0; i < 4 * rb->Width; i++) {
+            acc[i] = (GLshort) (acc[i] * s);
+         }
+      }
+   }
+   else {
+      /* use get/put row funcs */
+      GLuint y;
+      for (y = 0; y < rb->Height; y++) {
+         GLshort accRow[MAX_WIDTH * 4];
+         GLuint i;
+         rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);
+         for (i = 0; i < 4 * rb->Width; i++) {
+            accRow[i] = (GLshort) (accRow[i] * s);
+         }
+         rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);
+      }
+   }
+
+   swrast->_IntegerAccumMode = GL_FALSE;
+}
+
+
+
+/**
+ * Clear the accumulation Buffer.
+ */
+void
+_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint x, y, width, height;
+
+   /* No accumulation buffer! Not an error. */
+   if (!rb || !rb->Data)
+      return;
+
+   assert(rb->_BaseFormat == GL_RGBA);
+   /* add other types in future? */
+   assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+
+   /* bounds, with scissor */
+   x = ctx->DrawBuffer->_Xmin;
+   y = ctx->DrawBuffer->_Ymin;
+   width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+   height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+      const GLfloat accScale = 32767.0;
+      GLshort clearVal[4];
+      GLuint i;
+
+      clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);
+      clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);
+      clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);
+      clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);
+
+      for (i = 0; i < height; i++) {
+         rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+      }
+   }
+   else {
+      /* someday support other sizes */
+   }
+
+   /* update optimized accum state vars */
+   if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
+       ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
+#if USE_OPTIMIZED_ACCUM
+      swrast->_IntegerAccumMode = GL_TRUE;
+#else
+      swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+      swrast->_IntegerAccumScaler = 0.0;  /* denotes empty accum buffer */
+   }
+   else {
+      swrast->_IntegerAccumMode = GL_FALSE;
+   }
+}
+
+
+static void
+accum_add(struct gl_context *ctx, GLfloat value,
+          GLint xpos, GLint ypos, GLint width, GLint height )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_renderbuffer *rb
+      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+   assert(rb);
+
+   /* Leave optimized accum buffer mode */
+   if (swrast->_IntegerAccumMode)
+      rescale_accum(ctx);
+
+   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+      const GLshort incr = (GLshort) (value * ACCUM_SCALE16);
+      if (rb->GetPointer(ctx, rb, 0, 0)) {
+         GLint i, j;
+         for (i = 0; i < height; i++) {
+            GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+            for (j = 0; j < 4 * width; j++) {
+               acc[j] += incr;
+            }
+         }
+      }
+      else {
+         GLint i, j;
+         for (i = 0; i < height; i++) {
+            GLshort accRow[4 * MAX_WIDTH];
+            rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+            for (j = 0; j < 4 * width; j++) {
+               accRow[j] += incr;
+            }
+            rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+         }
+      }
+   }
+   else {
+      /* other types someday */
+   }
+}
+
+
+static void
+accum_mult(struct gl_context *ctx, GLfloat mult,
+           GLint xpos, GLint ypos, GLint width, GLint height )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_renderbuffer *rb
+      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+   assert(rb);
+
+   /* Leave optimized accum buffer mode */
+   if (swrast->_IntegerAccumMode)
+      rescale_accum(ctx);
+
+   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+      if (rb->GetPointer(ctx, rb, 0, 0)) {
+         GLint i, j;
+         for (i = 0; i < height; i++) {
+            GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+            for (j = 0; j < 4 * width; j++) {
+               acc[j] = (GLshort) (acc[j] * mult);
+            }
+         }
+      }
+      else {
+         GLint i, j;
+         for (i = 0; i < height; i++) {
+            GLshort accRow[4 * MAX_WIDTH];
+            rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+            for (j = 0; j < 4 * width; j++) {
+               accRow[j] = (GLshort) (accRow[j] * mult);
+            }
+            rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+         }
+      }
+   }
+   else {
+      /* other types someday */
+   }
+}
+
+
+
+static void
+accum_accum(struct gl_context *ctx, GLfloat value,
+            GLint xpos, GLint ypos, GLint width, GLint height )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_renderbuffer *rb
+      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+   const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+   assert(rb);
+
+   if (!ctx->ReadBuffer->_ColorReadBuffer) {
+      /* no read buffer - OK */
+      return;
+   }
+
+   /* May have to leave optimized accum buffer mode */
+   if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
+      swrast->_IntegerAccumScaler = value;
+   if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
+      rescale_accum(ctx);
+
+   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+      const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+      GLshort accumRow[4 * MAX_WIDTH];
+      GLchan rgba[MAX_WIDTH][4];
+      GLint i;
+
+      for (i = 0; i < height; i++) {
+         GLshort *acc;
+         if (directAccess) {
+            acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+         }
+         else {
+            rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+            acc = accumRow;
+         }
+
+         /* read colors from color buffer */
+         _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+                                xpos, ypos + i, CHAN_TYPE, rgba);
+
+         /* do accumulation */
+         if (swrast->_IntegerAccumMode) {
+            /* simply add integer color values into accum buffer */
+            GLint j;
+            for (j = 0; j < width; j++) {
+               acc[j * 4 + 0] += rgba[j][RCOMP];
+               acc[j * 4 + 1] += rgba[j][GCOMP];
+               acc[j * 4 + 2] += rgba[j][BCOMP];
+               acc[j * 4 + 3] += rgba[j][ACOMP];
+            }
+         }
+         else {
+            /* scaled integer (or float) accum buffer */
+            GLint j;
+            for (j = 0; j < width; j++) {
+               acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+               acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+               acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+               acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+            }
+         }
+
+         if (!directAccess) {
+            rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+         }
+      }
+   }
+   else {
+      /* other types someday */
+   }
+}
+
+
+
+static void
+accum_load(struct gl_context *ctx, GLfloat value,
+           GLint xpos, GLint ypos, GLint width, GLint height )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_renderbuffer *rb
+      = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+   const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+   assert(rb);
+
+   if (!ctx->ReadBuffer->_ColorReadBuffer) {
+      /* no read buffer - OK */
+      return;
+   }
+
+   /* This is a change to go into optimized accum buffer mode */
+   if (value > 0.0 && value <= 1.0) {
+#if USE_OPTIMIZED_ACCUM
+      swrast->_IntegerAccumMode = GL_TRUE;
+#else
+      swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+      swrast->_IntegerAccumScaler = value;
+   }
+   else {
+      swrast->_IntegerAccumMode = GL_FALSE;
+      swrast->_IntegerAccumScaler = 0.0;
+   }
+
+   if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+      const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+      GLshort accumRow[4 * MAX_WIDTH];
+      GLchan rgba[MAX_WIDTH][4];
+      GLint i;
+
+      for (i = 0; i < height; i++) {
+         GLshort *acc;
+         if (directAccess) {
+            acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+         }
+         else {
+            rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+            acc = accumRow;
+         }
+
+         /* read colors from color buffer */
+         _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+                                xpos, ypos + i, CHAN_TYPE, rgba);
+
+         /* do load */
+         if (swrast->_IntegerAccumMode) {
+            /* just copy values in */
+            GLint j;
+            assert(swrast->_IntegerAccumScaler > 0.0);
+            assert(swrast->_IntegerAccumScaler <= 1.0);
+            for (j = 0; j < width; j++) {
+               acc[j * 4 + 0] = rgba[j][RCOMP];
+               acc[j * 4 + 1] = rgba[j][GCOMP];
+               acc[j * 4 + 2] = rgba[j][BCOMP];
+               acc[j * 4 + 3] = rgba[j][ACOMP];
+            }
+         }
+         else {
+            /* scaled integer (or float) accum buffer */
+            GLint j;
+            for (j = 0; j < width; j++) {
+               acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+               acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+               acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+               acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+            }
+         }
+
+         if (!directAccess) {
+            rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+         }
+      }
+   }
+}
+
+
+static void
+accum_return(struct gl_context *ctx, GLfloat value,
+             GLint xpos, GLint ypos, GLint width, GLint height )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+   struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+   const GLboolean directAccess
+      = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);
+
+   static GLchan multTable[32768];
+   static GLfloat prevMult = 0.0;
+   const GLfloat mult = swrast->_IntegerAccumScaler;
+   const GLint max = MIN2((GLint) (256 / mult), 32767);
+
+   /* May have to leave optimized accum buffer mode */
+   if (swrast->_IntegerAccumMode && value != 1.0)
+      rescale_accum(ctx);
+
+   if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
+      /* build lookup table to avoid many floating point multiplies */
+      GLint j;
+      assert(swrast->_IntegerAccumScaler <= 1.0);
+      if (mult != prevMult) {
+         for (j = 0; j < max; j++)
+            multTable[j] = IROUND((GLfloat) j * mult);
+         prevMult = mult;
+      }
+   }
+
+   if (accumRb->DataType == GL_SHORT ||
+       accumRb->DataType == GL_UNSIGNED_SHORT) {
+      const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;
+      GLuint buffer;
+      GLint i;
+
+      /* XXX maybe transpose the 'i' and 'buffer' loops??? */
+      for (i = 0; i < height; i++) {
+         GLshort accumRow[4 * MAX_WIDTH];
+         GLshort *acc;
+         SWspan span;
+
+         /* init color span */
+         INIT_SPAN(span, GL_BITMAP);
+         span.end = width;
+         span.arrayMask = SPAN_RGBA;
+         span.x = xpos;
+         span.y = ypos + i;
+
+         if (directAccess) {
+            acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);
+         }
+         else {
+            accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);
+            acc = accumRow;
+         }
+
+         /* get the colors to return */
+         if (swrast->_IntegerAccumMode) {
+            GLint j;
+            for (j = 0; j < width; j++) {
+               ASSERT(acc[j * 4 + 0] < max);
+               ASSERT(acc[j * 4 + 1] < max);
+               ASSERT(acc[j * 4 + 2] < max);
+               ASSERT(acc[j * 4 + 3] < max);
+               span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
+               span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
+               span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
+               span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
+            }
+         }
+         else {
+            /* scaled integer (or float) accum buffer */
+            GLint j;
+            for (j = 0; j < width; j++) {
+#if CHAN_BITS==32
+               GLchan r = acc[j * 4 + 0] * scale;
+               GLchan g = acc[j * 4 + 1] * scale;
+               GLchan b = acc[j * 4 + 2] * scale;
+               GLchan a = acc[j * 4 + 3] * scale;
+#else
+               GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );
+               GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );
+               GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );
+               GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );
+#endif
+               span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
+               span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
+               span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
+               span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
+            }
+         }
+
+         /* store colors */
+         for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
+            struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
+            const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
+                                       !ctx->Color.ColorMask[buffer][GCOMP] ||
+                                       !ctx->Color.ColorMask[buffer][BCOMP] ||
+                                       !ctx->Color.ColorMask[buffer][ACOMP]);
+            if (masking) {
+               _swrast_mask_rgba_span(ctx, rb, &span, buffer);
+            }
+            rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
+         }
+      }
+   }
+   else {
+      /* other types someday */
+   }
+}
+
+
+
+/**
+ * Software fallback for glAccum.
+ */
+void
+_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLint xpos, ypos, width, height;
+
+   if (swrast->NewState)
+      _swrast_validate_derived( ctx );
+
+   if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
+      _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
+      return;
+   }
+
+   if (!_mesa_check_conditional_render(ctx))
+      return;
+
+   swrast_render_start(ctx);
+
+   /* Compute region after calling swrast_render_start() so that we know the
+    * drawbuffer's size/bounds are up to date.
+    */
+   xpos = ctx->DrawBuffer->_Xmin;
+   ypos = ctx->DrawBuffer->_Ymin;
+   width =  ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+   height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+   switch (op) {
+      case GL_ADD:
+         if (value != 0.0F) {
+            accum_add(ctx, value, xpos, ypos, width, height);
+	 }
+	 break;
+      case GL_MULT:
+         if (value != 1.0F) {
+            accum_mult(ctx, value, xpos, ypos, width, height);
+	 }
+	 break;
+      case GL_ACCUM:
+         if (value != 0.0F) {
+            accum_accum(ctx, value, xpos, ypos, width, height);
+         }
+	 break;
+      case GL_LOAD:
+         accum_load(ctx, value, xpos, ypos, width, height);
+	 break;
+      case GL_RETURN:
+         accum_return(ctx, value, xpos, ypos, width, height);
+	 break;
+      default:
+         _mesa_problem(ctx, "invalid mode in _swrast_Accum()");
+         break;
+   }
+
+   swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_context.c b/mesalib/src/mesa/swrast/s_context.c
index b0c9880b1..def1531d7 100644
--- a/mesalib/src/mesa/swrast/s_context.c
+++ b/mesalib/src/mesa/swrast/s_context.c
@@ -1,957 +1,949 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

- *

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

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

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

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

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

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

- *

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

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

- *

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

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

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

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

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

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

- *

- * Authors:

- *    Keith Whitwell <keith@tungstengraphics.com>

- *    Brian Paul

- */

-

-#include "main/imports.h"

-#include "main/bufferobj.h"

-#include "main/colormac.h"

-#include "main/mtypes.h"

-#include "main/teximage.h"

-#include "program/prog_parameter.h"

-#include "program/prog_statevars.h"

-#include "swrast.h"

-#include "s_blend.h"

-#include "s_context.h"

-#include "s_lines.h"

-#include "s_points.h"

-#include "s_span.h"

-#include "s_triangle.h"

-#include "s_texfilter.h"

-

-

-/**

- * Recompute the value of swrast->_RasterMask, etc. according to

- * the current context.  The _RasterMask field can be easily tested by

- * drivers to determine certain basic GL state (does the primitive need

- * stenciling, logic-op, fog, etc?).

- */

-static void

-_swrast_update_rasterflags( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLbitfield rasterMask = 0;

-   GLuint i;

-

-   if (ctx->Color.AlphaEnabled)           rasterMask |= ALPHATEST_BIT;

-   if (ctx->Color.BlendEnabled)           rasterMask |= BLEND_BIT;

-   if (ctx->Depth.Test)                   rasterMask |= DEPTH_BIT;

-   if (swrast->_FogEnabled)               rasterMask |= FOG_BIT;

-   if (ctx->Scissor.Enabled)              rasterMask |= CLIP_BIT;

-   if (ctx->Stencil._Enabled)             rasterMask |= STENCIL_BIT;

-   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

-      if (!ctx->Color.ColorMask[i][0] ||

-          !ctx->Color.ColorMask[i][1] ||

-          !ctx->Color.ColorMask[i][2] ||

-          !ctx->Color.ColorMask[i][3]) {

-         rasterMask |= MASKING_BIT;

-         break;

-      }

-   }

-   if (ctx->Color._LogicOpEnabled)     rasterMask |= LOGIC_OP_BIT;

-   if (ctx->Texture._EnabledUnits)     rasterMask |= TEXTURE_BIT;

-   if (   ctx->Viewport.X < 0

-       || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width

-       || ctx->Viewport.Y < 0

-       || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {

-      rasterMask |= CLIP_BIT;

-   }

-

-   if (ctx->Query.CurrentOcclusionObject)

-      rasterMask |= OCCLUSION_BIT;

-

-

-   /* If we're not drawing to exactly one color buffer set the

-    * MULTI_DRAW_BIT flag.  Also set it if we're drawing to no

-    * buffers or the RGBA or CI mask disables all writes.

-    */

-   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {

-      /* more than one color buffer designated for writing (or zero buffers) */

-      rasterMask |= MULTI_DRAW_BIT;

-   }

-

-   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

-      if (ctx->Color.ColorMask[i][0] +

-          ctx->Color.ColorMask[i][1] +

-          ctx->Color.ColorMask[i][2] +

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

-         rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */

-         break;

-      }

-   }

-

-

-   if (ctx->FragmentProgram._Current) {

-      rasterMask |= FRAGPROG_BIT;

-   }

-

-   if (ctx->ATIFragmentShader._Enabled) {

-      rasterMask |= ATIFRAGSHADER_BIT;

-   }

-

-#if CHAN_TYPE == GL_FLOAT

-   if (ctx->Color.ClampFragmentColor == GL_TRUE) {

-      rasterMask |= CLAMPING_BIT;

-   }

-#endif

-

-   SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;

-}

-

-

-/**

- * Examine polygon cull state to compute the _BackfaceCullSign field.

- * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,

- * and 1 if culling front-faces.  The Polygon FrontFace state also

- * factors in.

- */

-static void

-_swrast_update_polygon( struct gl_context *ctx )

-{

-   GLfloat backface_sign;

-

-   if (ctx->Polygon.CullFlag) {

-      switch (ctx->Polygon.CullFaceMode) {

-      case GL_BACK:

-         backface_sign = -1.0F;

-	 break;

-      case GL_FRONT:

-         backface_sign = 1.0F;

-	 break;

-      case GL_FRONT_AND_BACK:

-         /* fallthrough */

-      default:

-	 backface_sign = 0.0F;

-      }

-   }

-   else {

-      backface_sign = 0.0F;

-   }

-

-   SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;

-

-   /* This is for front/back-face determination, but not for culling */

-   SWRAST_CONTEXT(ctx)->_BackfaceSign

-      = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;

-}

-

-

-

-/**

- * Update the _PreferPixelFog field to indicate if we need to compute

- * fog blend factors (from the fog coords) per-fragment.

- */

-static void

-_swrast_update_fog_hint( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||

-                              ctx->FragmentProgram._Current ||

-			      (ctx->Hint.Fog == GL_NICEST &&

-			       swrast->AllowPixelFog));

-}

-

-

-

-/**

- * Update the swrast->_TextureCombinePrimary flag.

- */

-static void

-_swrast_update_texture_env( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint i;

-

-   swrast->_TextureCombinePrimary = GL_FALSE;

-

-   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {

-      const struct gl_tex_env_combine_state *combine =

-         ctx->Texture.Unit[i]._CurrentCombine;

-      GLuint term;

-      for (term = 0; term < combine->_NumArgsRGB; term++) {

-         if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {

-            swrast->_TextureCombinePrimary = GL_TRUE;

-            return;

-         }

-         if (combine->SourceA[term] == GL_PRIMARY_COLOR) {

-            swrast->_TextureCombinePrimary = GL_TRUE;

-            return;

-         }

-      }

-   }

-}

-

-

-/**

- * Determine if we can defer texturing/shading until after Z/stencil

- * testing.  This potentially allows us to skip texturing/shading for

- * lots of fragments.

- */

-static void

-_swrast_update_deferred_texture(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (ctx->Color.AlphaEnabled) {

-      /* alpha test depends on post-texture/shader colors */

-      swrast->_DeferredTexture = GL_FALSE;

-   }

-   else {

-      const struct gl_fragment_program *fprog

-         = ctx->FragmentProgram._Current;

-      if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {

-         /* Z comes from fragment program/shader */

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else if (fprog && fprog->UsesKill) {

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else if (ctx->Query.CurrentOcclusionObject) {

-         /* occlusion query depends on shader discard/kill results */

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else {

-         swrast->_DeferredTexture = GL_TRUE;

-      }

-   }

-}

-

-

-/**

- * Update swrast->_FogColor and swrast->_FogEnable values.

- */

-static void

-_swrast_update_fog_state( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;

-

-   /* determine if fog is needed, and if so, which fog mode */

-   swrast->_FogEnabled = GL_FALSE;

-   if (fp && fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB) {

-      if (fp->FogOption != GL_NONE) {

-         swrast->_FogEnabled = GL_TRUE;

-         swrast->_FogMode = fp->FogOption;

-      }

-   }

-   else if (ctx->Fog.Enabled) {

-      swrast->_FogEnabled = GL_TRUE;

-      swrast->_FogMode = ctx->Fog.Mode;

-   }

-}

-

-

-/**

- * Update state for running fragment programs.  Basically, load the

- * program parameters with current state values.

- */

-static void

-_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)

-{

-   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;

-   if (fp) {

-      _mesa_load_state_parameters(ctx, fp->Base.Parameters);

-   }

-}

-

-

-/**

- * See if we can do early diffuse+specular (primary+secondary) color

- * add per vertex instead of per-fragment.

- */

-static void

-_swrast_update_specular_vertex_add(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||

-      (ctx->Light.Enabled &&

-       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);

-

-   swrast->SpecularVertexAdd = (separateSpecular

-                                && ctx->Texture._EnabledUnits == 0x0

-                                && !ctx->FragmentProgram._Current

-                                && !ctx->ATIFragmentShader._Enabled);

-}

-

-

-#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK |	\

-                             _NEW_PROGRAM_CONSTANTS |   \

-			     _NEW_TEXTURE |		\

-			     _NEW_HINT |		\

-			     _NEW_POLYGON )

-

-/* State referenced by _swrast_choose_triangle, _swrast_choose_line.

- */

-#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED |		\

-			      _NEW_RENDERMODE|			\

-                              _NEW_POLYGON|			\

-                              _NEW_DEPTH|			\

-                              _NEW_STENCIL|			\

-                              _NEW_COLOR|			\

-                              _NEW_TEXTURE|			\

-                              _SWRAST_NEW_RASTERMASK|		\

-                              _NEW_LIGHT|			\

-                              _NEW_FOG |			\

-			      _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED |		\

-			  _NEW_RENDERMODE|		\

-                          _NEW_LINE|			\

-                          _NEW_TEXTURE|			\

-                          _NEW_LIGHT|			\

-                          _NEW_FOG|			\

-                          _NEW_DEPTH |			\

-                          _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED |	\

-			   _NEW_RENDERMODE |		\

-			   _NEW_POINT |			\

-			   _NEW_TEXTURE |		\

-			   _NEW_LIGHT |			\

-			   _NEW_FOG |			\

-                           _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE

-

-#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE

-

-#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR

-

-

-

-/**

- * Stub for swrast->Triangle to select a true triangle function

- * after a state change.

- */

-static void

-_swrast_validate_triangle( struct gl_context *ctx,

-			   const SWvertex *v0,

-                           const SWvertex *v1,

-                           const SWvertex *v2 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_triangle( ctx );

-   ASSERT(swrast->Triangle);

-

-   if (swrast->SpecularVertexAdd) {

-      /* separate specular color, but no texture */

-      swrast->SpecTriangle = swrast->Triangle;

-      swrast->Triangle = _swrast_add_spec_terms_triangle;

-   }

-

-   swrast->Triangle( ctx, v0, v1, v2 );

-}

-

-/**

- * Called via swrast->Line.  Examine current GL state and choose a software

- * line routine.  Then call it.

- */

-static void

-_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_line( ctx );

-   ASSERT(swrast->Line);

-

-   if (swrast->SpecularVertexAdd) {

-      swrast->SpecLine = swrast->Line;

-      swrast->Line = _swrast_add_spec_terms_line;

-   }

-

-   swrast->Line( ctx, v0, v1 );

-}

-

-/**

- * Called via swrast->Point.  Examine current GL state and choose a software

- * point routine.  Then call it.

- */

-static void

-_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_point( ctx );

-

-   if (swrast->SpecularVertexAdd) {

-      swrast->SpecPoint = swrast->Point;

-      swrast->Point = _swrast_add_spec_terms_point;

-   }

-

-   swrast->Point( ctx, v0 );

-}

-

-

-/**

- * Called via swrast->BlendFunc.  Examine GL state to choose a blending

- * function, then call it.

- */

-static void _ASMAPI

-_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                            GLvoid *src, const GLvoid *dst,

-                            GLenum chanType )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx ); /* why is this needed? */

-   _swrast_choose_blend_func( ctx, chanType );

-

-   swrast->BlendFunc( ctx, n, mask, src, dst, chanType );

-}

-

-

-/**

- * Make sure we have texture image data for all the textures we may need

- * for subsequent rendering.

- */

-static void

-_swrast_validate_texture_images(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint u;

-

-   if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) {

-      /* no textures enabled, or no way to validate images! */

-      return;

-   }

-

-   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {

-      if (ctx->Texture.Unit[u]._ReallyEnabled) {

-         struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;

-         ASSERT(texObj);

-         if (texObj) {

-            GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;

-            GLuint face;

-            for (face = 0; face < numFaces; face++) {

-               GLint lvl;

-               for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {

-                  struct gl_texture_image *texImg = texObj->Image[face][lvl];

-                  if (texImg && !texImg->Data) {

-                     swrast->ValidateTextureImage(ctx, texObj, face, lvl);

-                     ASSERT(texObj->Image[face][lvl]->Data);

-                  }

-               }

-            }

-         }

-      }

-   }

-}

-

-

-/**

- * Free the texture image data attached to all currently enabled

- * textures.  Meant to be called by device drivers when transitioning

- * from software to hardware rendering.

- */

-void

-_swrast_eject_texture_images(struct gl_context *ctx)

-{

-   GLuint u;

-

-   if (!ctx->Texture._EnabledUnits) {

-      /* no textures enabled */

-      return;

-   }

-

-   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {

-      if (ctx->Texture.Unit[u]._ReallyEnabled) {

-         struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;

-         ASSERT(texObj);

-         if (texObj) {

-            GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;

-            GLuint face;

-            for (face = 0; face < numFaces; face++) {

-               GLint lvl;

-               for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {

-                  struct gl_texture_image *texImg = texObj->Image[face][lvl];

-                  if (texImg && texImg->Data) {

-                     _mesa_free_texmemory(texImg->Data);

-                     texImg->Data = NULL;

-                  }

-               }

-            }

-         }

-      }

-   }

-}

-

-

-

-static void

-_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )

-{

-   (void) ctx; (void) new_state;

-}

-

-

-static void

-_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint i;

-

-   swrast->NewState |= new_state;

-

-   /* After 10 statechanges without any swrast functions being called,

-    * put the module to sleep.

-    */

-   if (++swrast->StateChanges > 10) {

-      swrast->InvalidateState = _swrast_sleep;

-      swrast->NewState = ~0;

-      new_state = ~0;

-   }

-

-   if (new_state & swrast->InvalidateTriangleMask)

-      swrast->Triangle = _swrast_validate_triangle;

-

-   if (new_state & swrast->InvalidateLineMask)

-      swrast->Line = _swrast_validate_line;

-

-   if (new_state & swrast->InvalidatePointMask)

-      swrast->Point = _swrast_validate_point;

-

-   if (new_state & _SWRAST_NEW_BLEND_FUNC)

-      swrast->BlendFunc = _swrast_validate_blend_func;

-

-   if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)

-      for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)

-	 swrast->TextureSample[i] = NULL;

-}

-

-

-void

-_swrast_update_texture_samplers(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint u;

-

-   if (!swrast)

-      return; /* pipe hack */

-

-   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {

-      const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;

-      /* Note: If tObj is NULL, the sample function will be a simple

-       * function that just returns opaque black (0,0,0,1).

-       */

-      swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);

-   }

-}

-

-

-/**

- * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,

- * swrast->_ActiveAtttribMask.

- */

-static void

-_swrast_update_active_attribs(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint attribsMask;

-

-   /*

-    * Compute _ActiveAttribsMask = which fragment attributes are needed.

-    */

-   if (ctx->FragmentProgram._Current) {

-      /* fragment program/shader */

-      attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;

-      attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */

-   }

-   else if (ctx->ATIFragmentShader._Enabled) {

-      attribsMask = ~0;  /* XXX fix me */

-   }

-   else {

-      /* fixed function */

-      attribsMask = 0x0;

-

-#if CHAN_TYPE == GL_FLOAT

-      attribsMask |= FRAG_BIT_COL0;

-#endif

-

-      if (ctx->Fog.ColorSumEnabled ||

-          (ctx->Light.Enabled &&

-           ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {

-         attribsMask |= FRAG_BIT_COL1;

-      }

-

-      if (swrast->_FogEnabled)

-         attribsMask |= FRAG_BIT_FOGC;

-

-      attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);

-   }

-

-   swrast->_ActiveAttribMask = attribsMask;

-

-   /* Update _ActiveAttribs[] list */

-   {

-      GLuint i, num = 0;

-      for (i = 0; i < FRAG_ATTRIB_MAX; i++) {

-         if (attribsMask & (1 << i)) {

-            swrast->_ActiveAttribs[num++] = i;

-            /* how should this attribute be interpolated? */

-            if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)

-               swrast->_InterpMode[i] = ctx->Light.ShadeModel;

-            else

-               swrast->_InterpMode[i] = GL_SMOOTH;

-         }

-      }

-      swrast->_NumActiveAttribs = num;

-   }

-}

-

-

-void

-_swrast_validate_derived( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   if (swrast->NewState) {

-      if (swrast->NewState & _NEW_POLYGON)

-	 _swrast_update_polygon( ctx );

-

-      if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))

-	 _swrast_update_fog_hint( ctx );

-

-      if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)

-	 _swrast_update_texture_env( ctx );

-

-      if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))

-         _swrast_update_fog_state( ctx );

-

-      if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))

-	 _swrast_update_fragment_program( ctx, swrast->NewState );

-

-      if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {

-         _swrast_update_texture_samplers( ctx );

-         _swrast_validate_texture_images(ctx);

-      }

-

-      if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))

-         _swrast_update_deferred_texture(ctx);

-

-      if (swrast->NewState & _SWRAST_NEW_RASTERMASK)

- 	 _swrast_update_rasterflags( ctx );

-

-      if (swrast->NewState & (_NEW_DEPTH |

-                              _NEW_FOG |

-                              _NEW_LIGHT |

-                              _NEW_PROGRAM |

-                              _NEW_TEXTURE))

-         _swrast_update_active_attribs(ctx);

-

-      if (swrast->NewState & (_NEW_FOG | 

-                              _NEW_PROGRAM |

-                              _NEW_LIGHT |

-                              _NEW_TEXTURE))

-         _swrast_update_specular_vertex_add(ctx);

-

-      swrast->NewState = 0;

-      swrast->StateChanges = 0;

-      swrast->InvalidateState = _swrast_invalidate_state;

-   }

-}

-

-#define SWRAST_DEBUG 0

-

-/* Public entrypoints:  See also s_accum.c, s_bitmap.c, etc.

- */

-void

-_swrast_Quad( struct gl_context *ctx,

-	      const SWvertex *v0, const SWvertex *v1,

-              const SWvertex *v2, const SWvertex *v3 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Quad\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-      _swrast_print_vertex( ctx, v2 );

-      _swrast_print_vertex( ctx, v3 );

-   }

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );

-}

-

-void

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

-                  const SWvertex *v1, const SWvertex *v2 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Triangle\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-      _swrast_print_vertex( ctx, v2 );

-   }

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );

-}

-

-void

-_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Line\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-   }

-   SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );

-}

-

-void

-_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Point\n");

-      _swrast_print_vertex( ctx, v0 );

-   }

-   SWRAST_CONTEXT(ctx)->Point( ctx, v0 );

-}

-

-void

-_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_InvalidateState\n");

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );

-}

-

-void

-_swrast_ResetLineStipple( struct gl_context *ctx )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_ResetLineStipple\n");

-   }

-   SWRAST_CONTEXT(ctx)->StippleCounter = 0;

-}

-

-void

-_swrast_SetFacing(struct gl_context *ctx, GLuint facing)

-{

-   SWRAST_CONTEXT(ctx)->PointLineFacing = facing;

-}

-

-void

-_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );

-   SWRAST_CONTEXT(ctx)->AllowVertexFog = value;

-}

-

-void

-_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );

-   SWRAST_CONTEXT(ctx)->AllowPixelFog = value;

-}

-

-

-GLboolean

-_swrast_CreateContext( struct gl_context *ctx )

-{

-   GLuint i;

-   SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));

-

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_CreateContext\n");

-   }

-

-   if (!swrast)

-      return GL_FALSE;

-

-   swrast->NewState = ~0;

-

-   swrast->choose_point = _swrast_choose_point;

-   swrast->choose_line = _swrast_choose_line;

-   swrast->choose_triangle = _swrast_choose_triangle;

-

-   swrast->InvalidatePointMask = _SWRAST_NEW_POINT;

-   swrast->InvalidateLineMask = _SWRAST_NEW_LINE;

-   swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;

-

-   swrast->Point = _swrast_validate_point;

-   swrast->Line = _swrast_validate_line;

-   swrast->Triangle = _swrast_validate_triangle;

-   swrast->InvalidateState = _swrast_sleep;

-   swrast->BlendFunc = _swrast_validate_blend_func;

-

-   swrast->AllowVertexFog = GL_TRUE;

-   swrast->AllowPixelFog = GL_TRUE;

-

-   /* Optimized Accum buffer */

-   swrast->_IntegerAccumMode = GL_FALSE;

-   swrast->_IntegerAccumScaler = 0.0;

-

-   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)

-      swrast->TextureSample[i] = NULL;

-

-   swrast->SpanArrays = MALLOC_STRUCT(sw_span_arrays);

-   if (!swrast->SpanArrays) {

-      FREE(swrast);

-      return GL_FALSE;

-   }

-   swrast->SpanArrays->ChanType = CHAN_TYPE;

-#if CHAN_TYPE == GL_UNSIGNED_BYTE

-   swrast->SpanArrays->rgba = swrast->SpanArrays->rgba8;

-#elif CHAN_TYPE == GL_UNSIGNED_SHORT

-   swrast->SpanArrays->rgba = swrast->SpanArrays->rgba16;

-#else

-   swrast->SpanArrays->rgba = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];

-#endif

-

-   /* init point span buffer */

-   swrast->PointSpan.primitive = GL_POINT;

-   swrast->PointSpan.end = 0;

-   swrast->PointSpan.facing = 0;

-   swrast->PointSpan.array = swrast->SpanArrays;

-

-   swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits *

-                                           MAX_WIDTH * 4 * sizeof(GLfloat));

-   if (!swrast->TexelBuffer) {

-      FREE(swrast->SpanArrays);

-      FREE(swrast);

-      return GL_FALSE;

-   }

-

-   ctx->swrast_context = swrast;

-

-   return GL_TRUE;

-}

-

-void

-_swrast_DestroyContext( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_DestroyContext\n");

-   }

-

-   FREE( swrast->SpanArrays );

-   if (swrast->ZoomedArrays)

-      FREE( swrast->ZoomedArrays );

-   FREE( swrast->TexelBuffer );

-   FREE( swrast );

-

-   ctx->swrast_context = 0;

-}

-

-

-struct swrast_device_driver *

-_swrast_GetDeviceDriverReference( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   return &swrast->Driver;

-}

-

-void

-_swrast_flush( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   /* flush any pending fragments from rendering points */

-   if (swrast->PointSpan.end > 0) {

-      _swrast_write_rgba_span(ctx, &(swrast->PointSpan));

-      swrast->PointSpan.end = 0;

-   }

-}

-

-void

-_swrast_render_primitive( struct gl_context *ctx, GLenum prim )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {

-      _swrast_flush(ctx);

-   }

-   swrast->Primitive = prim;

-}

-

-

-void

-_swrast_render_start( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderStart)

-      swrast->Driver.SpanRenderStart( ctx );

-   swrast->PointSpan.end = 0;

-}

- 

-void

-_swrast_render_finish( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderFinish)

-      swrast->Driver.SpanRenderFinish( ctx );

-

-   _swrast_flush(ctx);

-}

-

-

-#define SWRAST_DEBUG_VERTICES 0

-

-void

-_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )

-{

-   GLuint i;

-

-   if (SWRAST_DEBUG_VERTICES) {

-      _mesa_debug(ctx, "win %f %f %f %f\n",

-                  v->attrib[FRAG_ATTRIB_WPOS][0],

-                  v->attrib[FRAG_ATTRIB_WPOS][1],

-                  v->attrib[FRAG_ATTRIB_WPOS][2],

-                  v->attrib[FRAG_ATTRIB_WPOS][3]);

-

-      for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)

-	 if (ctx->Texture.Unit[i]._ReallyEnabled)

-	    _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][0],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][1],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][2],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][3]);

-

-#if CHAN_TYPE == GL_FLOAT

-      _mesa_debug(ctx, "color %f %f %f %f\n",

-                  v->color[0], v->color[1], v->color[2], v->color[3]);

-#else

-      _mesa_debug(ctx, "color %d %d %d %d\n",

-                  v->color[0], v->color[1], v->color[2], v->color[3]);

-#endif

-      _mesa_debug(ctx, "spec %g %g %g %g\n",

-                  v->attrib[FRAG_ATTRIB_COL1][0],

-                  v->attrib[FRAG_ATTRIB_COL1][1],

-                  v->attrib[FRAG_ATTRIB_COL1][2],

-                  v->attrib[FRAG_ATTRIB_COL1][3]);

-      _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);

-      _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);

-      _mesa_debug(ctx, "pointsize %f\n", v->pointSize);

-      _mesa_debug(ctx, "\n");

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *    Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/bufferobj.h"
+#include "main/colormac.h"
+#include "main/mtypes.h"
+#include "main/teximage.h"
+#include "program/prog_parameter.h"
+#include "program/prog_statevars.h"
+#include "swrast.h"
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_lines.h"
+#include "s_points.h"
+#include "s_span.h"
+#include "s_triangle.h"
+#include "s_texfilter.h"
+
+
+/**
+ * Recompute the value of swrast->_RasterMask, etc. according to
+ * the current context.  The _RasterMask field can be easily tested by
+ * drivers to determine certain basic GL state (does the primitive need
+ * stenciling, logic-op, fog, etc?).
+ */
+static void
+_swrast_update_rasterflags( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLbitfield rasterMask = 0;
+   GLuint i;
+
+   if (ctx->Color.AlphaEnabled)           rasterMask |= ALPHATEST_BIT;
+   if (ctx->Color.BlendEnabled)           rasterMask |= BLEND_BIT;
+   if (ctx->Depth.Test)                   rasterMask |= DEPTH_BIT;
+   if (swrast->_FogEnabled)               rasterMask |= FOG_BIT;
+   if (ctx->Scissor.Enabled)              rasterMask |= CLIP_BIT;
+   if (ctx->Stencil._Enabled)             rasterMask |= STENCIL_BIT;
+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+      if (!ctx->Color.ColorMask[i][0] ||
+          !ctx->Color.ColorMask[i][1] ||
+          !ctx->Color.ColorMask[i][2] ||
+          !ctx->Color.ColorMask[i][3]) {
+         rasterMask |= MASKING_BIT;
+         break;
+      }
+   }
+   if (ctx->Color._LogicOpEnabled)     rasterMask |= LOGIC_OP_BIT;
+   if (ctx->Texture._EnabledUnits)     rasterMask |= TEXTURE_BIT;
+   if (   ctx->Viewport.X < 0
+       || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
+       || ctx->Viewport.Y < 0
+       || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
+      rasterMask |= CLIP_BIT;
+   }
+
+   if (ctx->Query.CurrentOcclusionObject)
+      rasterMask |= OCCLUSION_BIT;
+
+
+   /* If we're not drawing to exactly one color buffer set the
+    * MULTI_DRAW_BIT flag.  Also set it if we're drawing to no
+    * buffers or the RGBA or CI mask disables all writes.
+    */
+   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
+      /* more than one color buffer designated for writing (or zero buffers) */
+      rasterMask |= MULTI_DRAW_BIT;
+   }
+
+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+      if (ctx->Color.ColorMask[i][0] +
+          ctx->Color.ColorMask[i][1] +
+          ctx->Color.ColorMask[i][2] +
+          ctx->Color.ColorMask[i][3] == 0) {
+         rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
+         break;
+      }
+   }
+
+
+   if (ctx->FragmentProgram._Current) {
+      rasterMask |= FRAGPROG_BIT;
+   }
+
+   if (ctx->ATIFragmentShader._Enabled) {
+      rasterMask |= ATIFRAGSHADER_BIT;
+   }
+
+#if CHAN_TYPE == GL_FLOAT
+   if (ctx->Color.ClampFragmentColor == GL_TRUE) {
+      rasterMask |= CLAMPING_BIT;
+   }
+#endif
+
+   SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
+}
+
+
+/**
+ * Examine polygon cull state to compute the _BackfaceCullSign field.
+ * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
+ * and 1 if culling front-faces.  The Polygon FrontFace state also
+ * factors in.
+ */
+static void
+_swrast_update_polygon( struct gl_context *ctx )
+{
+   GLfloat backface_sign;
+
+   if (ctx->Polygon.CullFlag) {
+      switch (ctx->Polygon.CullFaceMode) {
+      case GL_BACK:
+         backface_sign = -1.0F;
+	 break;
+      case GL_FRONT:
+         backface_sign = 1.0F;
+	 break;
+      case GL_FRONT_AND_BACK:
+         /* fallthrough */
+      default:
+	 backface_sign = 0.0F;
+      }
+   }
+   else {
+      backface_sign = 0.0F;
+   }
+
+   SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
+
+   /* This is for front/back-face determination, but not for culling */
+   SWRAST_CONTEXT(ctx)->_BackfaceSign
+      = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;
+}
+
+
+
+/**
+ * Update the _PreferPixelFog field to indicate if we need to compute
+ * fog blend factors (from the fog coords) per-fragment.
+ */
+static void
+_swrast_update_fog_hint( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
+                              ctx->FragmentProgram._Current ||
+			      (ctx->Hint.Fog == GL_NICEST &&
+			       swrast->AllowPixelFog));
+}
+
+
+
+/**
+ * Update the swrast->_TextureCombinePrimary flag.
+ */
+static void
+_swrast_update_texture_env( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint i;
+
+   swrast->_TextureCombinePrimary = GL_FALSE;
+
+   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+      const struct gl_tex_env_combine_state *combine =
+         ctx->Texture.Unit[i]._CurrentCombine;
+      GLuint term;
+      for (term = 0; term < combine->_NumArgsRGB; term++) {
+         if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {
+            swrast->_TextureCombinePrimary = GL_TRUE;
+            return;
+         }
+         if (combine->SourceA[term] == GL_PRIMARY_COLOR) {
+            swrast->_TextureCombinePrimary = GL_TRUE;
+            return;
+         }
+      }
+   }
+}
+
+
+/**
+ * Determine if we can defer texturing/shading until after Z/stencil
+ * testing.  This potentially allows us to skip texturing/shading for
+ * lots of fragments.
+ */
+static void
+_swrast_update_deferred_texture(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (ctx->Color.AlphaEnabled) {
+      /* alpha test depends on post-texture/shader colors */
+      swrast->_DeferredTexture = GL_FALSE;
+   }
+   else {
+      const struct gl_fragment_program *fprog
+         = ctx->FragmentProgram._Current;
+      if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {
+         /* Z comes from fragment program/shader */
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else if (fprog && fprog->UsesKill) {
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else if (ctx->Query.CurrentOcclusionObject) {
+         /* occlusion query depends on shader discard/kill results */
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else {
+         swrast->_DeferredTexture = GL_TRUE;
+      }
+   }
+}
+
+
+/**
+ * Update swrast->_FogColor and swrast->_FogEnable values.
+ */
+static void
+_swrast_update_fog_state( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+
+   assert((fp == NULL) || (fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB));
+
+   /* determine if fog is needed, and if so, which fog mode */
+   swrast->_FogEnabled = (fp == NULL && ctx->Fog.Enabled);
+}
+
+
+/**
+ * Update state for running fragment programs.  Basically, load the
+ * program parameters with current state values.
+ */
+static void
+_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)
+{
+   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+   if (fp) {
+      _mesa_load_state_parameters(ctx, fp->Base.Parameters);
+   }
+}
+
+
+/**
+ * See if we can do early diffuse+specular (primary+secondary) color
+ * add per vertex instead of per-fragment.
+ */
+static void
+_swrast_update_specular_vertex_add(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||
+      (ctx->Light.Enabled &&
+       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);
+
+   swrast->SpecularVertexAdd = (separateSpecular
+                                && ctx->Texture._EnabledUnits == 0x0
+                                && !ctx->FragmentProgram._Current
+                                && !ctx->ATIFragmentShader._Enabled);
+}
+
+
+#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK |	\
+                             _NEW_PROGRAM_CONSTANTS |   \
+			     _NEW_TEXTURE |		\
+			     _NEW_HINT |		\
+			     _NEW_POLYGON )
+
+/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
+ */
+#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED |		\
+			      _NEW_RENDERMODE|			\
+                              _NEW_POLYGON|			\
+                              _NEW_DEPTH|			\
+                              _NEW_STENCIL|			\
+                              _NEW_COLOR|			\
+                              _NEW_TEXTURE|			\
+                              _SWRAST_NEW_RASTERMASK|		\
+                              _NEW_LIGHT|			\
+                              _NEW_FOG |			\
+			      _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED |		\
+			  _NEW_RENDERMODE|		\
+                          _NEW_LINE|			\
+                          _NEW_TEXTURE|			\
+                          _NEW_LIGHT|			\
+                          _NEW_FOG|			\
+                          _NEW_DEPTH |			\
+                          _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED |	\
+			   _NEW_RENDERMODE |		\
+			   _NEW_POINT |			\
+			   _NEW_TEXTURE |		\
+			   _NEW_LIGHT |			\
+			   _NEW_FOG |			\
+                           _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
+
+#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
+
+#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
+
+
+
+/**
+ * Stub for swrast->Triangle to select a true triangle function
+ * after a state change.
+ */
+static void
+_swrast_validate_triangle( struct gl_context *ctx,
+			   const SWvertex *v0,
+                           const SWvertex *v1,
+                           const SWvertex *v2 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_triangle( ctx );
+   ASSERT(swrast->Triangle);
+
+   if (swrast->SpecularVertexAdd) {
+      /* separate specular color, but no texture */
+      swrast->SpecTriangle = swrast->Triangle;
+      swrast->Triangle = _swrast_add_spec_terms_triangle;
+   }
+
+   swrast->Triangle( ctx, v0, v1, v2 );
+}
+
+/**
+ * Called via swrast->Line.  Examine current GL state and choose a software
+ * line routine.  Then call it.
+ */
+static void
+_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_line( ctx );
+   ASSERT(swrast->Line);
+
+   if (swrast->SpecularVertexAdd) {
+      swrast->SpecLine = swrast->Line;
+      swrast->Line = _swrast_add_spec_terms_line;
+   }
+
+   swrast->Line( ctx, v0, v1 );
+}
+
+/**
+ * Called via swrast->Point.  Examine current GL state and choose a software
+ * point routine.  Then call it.
+ */
+static void
+_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_point( ctx );
+
+   if (swrast->SpecularVertexAdd) {
+      swrast->SpecPoint = swrast->Point;
+      swrast->Point = _swrast_add_spec_terms_point;
+   }
+
+   swrast->Point( ctx, v0 );
+}
+
+
+/**
+ * Called via swrast->BlendFunc.  Examine GL state to choose a blending
+ * function, then call it.
+ */
+static void _ASMAPI
+_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                            GLvoid *src, const GLvoid *dst,
+                            GLenum chanType )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx ); /* why is this needed? */
+   _swrast_choose_blend_func( ctx, chanType );
+
+   swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
+}
+
+
+/**
+ * Make sure we have texture image data for all the textures we may need
+ * for subsequent rendering.
+ */
+static void
+_swrast_validate_texture_images(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint u;
+
+   if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) {
+      /* no textures enabled, or no way to validate images! */
+      return;
+   }
+
+   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+      if (ctx->Texture.Unit[u]._ReallyEnabled) {
+         struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
+         ASSERT(texObj);
+         if (texObj) {
+            GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+            GLuint face;
+            for (face = 0; face < numFaces; face++) {
+               GLint lvl;
+               for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
+                  struct gl_texture_image *texImg = texObj->Image[face][lvl];
+                  if (texImg && !texImg->Data) {
+                     swrast->ValidateTextureImage(ctx, texObj, face, lvl);
+                     ASSERT(texObj->Image[face][lvl]->Data);
+                  }
+               }
+            }
+         }
+      }
+   }
+}
+
+
+/**
+ * Free the texture image data attached to all currently enabled
+ * textures.  Meant to be called by device drivers when transitioning
+ * from software to hardware rendering.
+ */
+void
+_swrast_eject_texture_images(struct gl_context *ctx)
+{
+   GLuint u;
+
+   if (!ctx->Texture._EnabledUnits) {
+      /* no textures enabled */
+      return;
+   }
+
+   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+      if (ctx->Texture.Unit[u]._ReallyEnabled) {
+         struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
+         ASSERT(texObj);
+         if (texObj) {
+            GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+            GLuint face;
+            for (face = 0; face < numFaces; face++) {
+               GLint lvl;
+               for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
+                  struct gl_texture_image *texImg = texObj->Image[face][lvl];
+                  if (texImg && texImg->Data) {
+                     _mesa_free_texmemory(texImg->Data);
+                     texImg->Data = NULL;
+                  }
+               }
+            }
+         }
+      }
+   }
+}
+
+
+
+static void
+_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )
+{
+   (void) ctx; (void) new_state;
+}
+
+
+static void
+_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint i;
+
+   swrast->NewState |= new_state;
+
+   /* After 10 statechanges without any swrast functions being called,
+    * put the module to sleep.
+    */
+   if (++swrast->StateChanges > 10) {
+      swrast->InvalidateState = _swrast_sleep;
+      swrast->NewState = ~0;
+      new_state = ~0;
+   }
+
+   if (new_state & swrast->InvalidateTriangleMask)
+      swrast->Triangle = _swrast_validate_triangle;
+
+   if (new_state & swrast->InvalidateLineMask)
+      swrast->Line = _swrast_validate_line;
+
+   if (new_state & swrast->InvalidatePointMask)
+      swrast->Point = _swrast_validate_point;
+
+   if (new_state & _SWRAST_NEW_BLEND_FUNC)
+      swrast->BlendFunc = _swrast_validate_blend_func;
+
+   if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
+      for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)
+	 swrast->TextureSample[i] = NULL;
+}
+
+
+void
+_swrast_update_texture_samplers(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint u;
+
+   if (!swrast)
+      return; /* pipe hack */
+
+   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+      const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+      /* Note: If tObj is NULL, the sample function will be a simple
+       * function that just returns opaque black (0,0,0,1).
+       */
+      swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+   }
+}
+
+
+/**
+ * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
+ * swrast->_ActiveAtttribMask.
+ */
+static void
+_swrast_update_active_attribs(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint attribsMask;
+
+   /*
+    * Compute _ActiveAttribsMask = which fragment attributes are needed.
+    */
+   if (ctx->FragmentProgram._Current) {
+      /* fragment program/shader */
+      attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
+      attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
+   }
+   else if (ctx->ATIFragmentShader._Enabled) {
+      attribsMask = ~0;  /* XXX fix me */
+   }
+   else {
+      /* fixed function */
+      attribsMask = 0x0;
+
+#if CHAN_TYPE == GL_FLOAT
+      attribsMask |= FRAG_BIT_COL0;
+#endif
+
+      if (ctx->Fog.ColorSumEnabled ||
+          (ctx->Light.Enabled &&
+           ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+         attribsMask |= FRAG_BIT_COL1;
+      }
+
+      if (swrast->_FogEnabled)
+         attribsMask |= FRAG_BIT_FOGC;
+
+      attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);
+   }
+
+   swrast->_ActiveAttribMask = attribsMask;
+
+   /* Update _ActiveAttribs[] list */
+   {
+      GLuint i, num = 0;
+      for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+         if (attribsMask & (1 << i)) {
+            swrast->_ActiveAttribs[num++] = i;
+            /* how should this attribute be interpolated? */
+            if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)
+               swrast->_InterpMode[i] = ctx->Light.ShadeModel;
+            else
+               swrast->_InterpMode[i] = GL_SMOOTH;
+         }
+      }
+      swrast->_NumActiveAttribs = num;
+   }
+}
+
+
+void
+_swrast_validate_derived( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (swrast->NewState) {
+      if (swrast->NewState & _NEW_POLYGON)
+	 _swrast_update_polygon( ctx );
+
+      if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))
+	 _swrast_update_fog_hint( ctx );
+
+      if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
+	 _swrast_update_texture_env( ctx );
+
+      if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))
+         _swrast_update_fog_state( ctx );
+
+      if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))
+	 _swrast_update_fragment_program( ctx, swrast->NewState );
+
+      if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {
+         _swrast_update_texture_samplers( ctx );
+         _swrast_validate_texture_images(ctx);
+      }
+
+      if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))
+         _swrast_update_deferred_texture(ctx);
+
+      if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
+ 	 _swrast_update_rasterflags( ctx );
+
+      if (swrast->NewState & (_NEW_DEPTH |
+                              _NEW_FOG |
+                              _NEW_LIGHT |
+                              _NEW_PROGRAM |
+                              _NEW_TEXTURE))
+         _swrast_update_active_attribs(ctx);
+
+      if (swrast->NewState & (_NEW_FOG | 
+                              _NEW_PROGRAM |
+                              _NEW_LIGHT |
+                              _NEW_TEXTURE))
+         _swrast_update_specular_vertex_add(ctx);
+
+      swrast->NewState = 0;
+      swrast->StateChanges = 0;
+      swrast->InvalidateState = _swrast_invalidate_state;
+   }
+}
+
+#define SWRAST_DEBUG 0
+
+/* Public entrypoints:  See also s_accum.c, s_bitmap.c, etc.
+ */
+void
+_swrast_Quad( struct gl_context *ctx,
+	      const SWvertex *v0, const SWvertex *v1,
+              const SWvertex *v2, const SWvertex *v3 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Quad\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+      _swrast_print_vertex( ctx, v2 );
+      _swrast_print_vertex( ctx, v3 );
+   }
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
+}
+
+void
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
+                  const SWvertex *v1, const SWvertex *v2 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Triangle\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+      _swrast_print_vertex( ctx, v2 );
+   }
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
+}
+
+void
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Line\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+   }
+   SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
+}
+
+void
+_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Point\n");
+      _swrast_print_vertex( ctx, v0 );
+   }
+   SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
+}
+
+void
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_InvalidateState\n");
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
+}
+
+void
+_swrast_ResetLineStipple( struct gl_context *ctx )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
+   }
+   SWRAST_CONTEXT(ctx)->StippleCounter = 0;
+}
+
+void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing)
+{
+   SWRAST_CONTEXT(ctx)->PointLineFacing = facing;
+}
+
+void
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+   SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
+}
+
+void
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+   SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
+}
+
+
+GLboolean
+_swrast_CreateContext( struct gl_context *ctx )
+{
+   GLuint i;
+   SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
+
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_CreateContext\n");
+   }
+
+   if (!swrast)
+      return GL_FALSE;
+
+   swrast->NewState = ~0;
+
+   swrast->choose_point = _swrast_choose_point;
+   swrast->choose_line = _swrast_choose_line;
+   swrast->choose_triangle = _swrast_choose_triangle;
+
+   swrast->InvalidatePointMask = _SWRAST_NEW_POINT;
+   swrast->InvalidateLineMask = _SWRAST_NEW_LINE;
+   swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;
+
+   swrast->Point = _swrast_validate_point;
+   swrast->Line = _swrast_validate_line;
+   swrast->Triangle = _swrast_validate_triangle;
+   swrast->InvalidateState = _swrast_sleep;
+   swrast->BlendFunc = _swrast_validate_blend_func;
+
+   swrast->AllowVertexFog = GL_TRUE;
+   swrast->AllowPixelFog = GL_TRUE;
+
+   /* Optimized Accum buffer */
+   swrast->_IntegerAccumMode = GL_FALSE;
+   swrast->_IntegerAccumScaler = 0.0;
+
+   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+      swrast->TextureSample[i] = NULL;
+
+   swrast->SpanArrays = MALLOC_STRUCT(sw_span_arrays);
+   if (!swrast->SpanArrays) {
+      FREE(swrast);
+      return GL_FALSE;
+   }
+   swrast->SpanArrays->ChanType = CHAN_TYPE;
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+   swrast->SpanArrays->rgba = swrast->SpanArrays->rgba8;
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+   swrast->SpanArrays->rgba = swrast->SpanArrays->rgba16;
+#else
+   swrast->SpanArrays->rgba = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
+#endif
+
+   /* init point span buffer */
+   swrast->PointSpan.primitive = GL_POINT;
+   swrast->PointSpan.end = 0;
+   swrast->PointSpan.facing = 0;
+   swrast->PointSpan.array = swrast->SpanArrays;
+
+   swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits *
+                                           MAX_WIDTH * 4 * sizeof(GLfloat));
+   if (!swrast->TexelBuffer) {
+      FREE(swrast->SpanArrays);
+      FREE(swrast);
+      return GL_FALSE;
+   }
+
+   ctx->swrast_context = swrast;
+
+   return GL_TRUE;
+}
+
+void
+_swrast_DestroyContext( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_DestroyContext\n");
+   }
+
+   FREE( swrast->SpanArrays );
+   if (swrast->ZoomedArrays)
+      FREE( swrast->ZoomedArrays );
+   FREE( swrast->TexelBuffer );
+   FREE( swrast );
+
+   ctx->swrast_context = 0;
+}
+
+
+struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   return &swrast->Driver;
+}
+
+void
+_swrast_flush( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   /* flush any pending fragments from rendering points */
+   if (swrast->PointSpan.end > 0) {
+      _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
+      swrast->PointSpan.end = 0;
+   }
+}
+
+void
+_swrast_render_primitive( struct gl_context *ctx, GLenum prim )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
+      _swrast_flush(ctx);
+   }
+   swrast->Primitive = prim;
+}
+
+
+void
+_swrast_render_start( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderStart)
+      swrast->Driver.SpanRenderStart( ctx );
+   swrast->PointSpan.end = 0;
+}
+ 
+void
+_swrast_render_finish( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderFinish)
+      swrast->Driver.SpanRenderFinish( ctx );
+
+   _swrast_flush(ctx);
+}
+
+
+#define SWRAST_DEBUG_VERTICES 0
+
+void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )
+{
+   GLuint i;
+
+   if (SWRAST_DEBUG_VERTICES) {
+      _mesa_debug(ctx, "win %f %f %f %f\n",
+                  v->attrib[FRAG_ATTRIB_WPOS][0],
+                  v->attrib[FRAG_ATTRIB_WPOS][1],
+                  v->attrib[FRAG_ATTRIB_WPOS][2],
+                  v->attrib[FRAG_ATTRIB_WPOS][3]);
+
+      for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
+	 if (ctx->Texture.Unit[i]._ReallyEnabled)
+	    _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][0],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][1],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][2],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
+
+#if CHAN_TYPE == GL_FLOAT
+      _mesa_debug(ctx, "color %f %f %f %f\n",
+                  v->color[0], v->color[1], v->color[2], v->color[3]);
+#else
+      _mesa_debug(ctx, "color %d %d %d %d\n",
+                  v->color[0], v->color[1], v->color[2], v->color[3]);
+#endif
+      _mesa_debug(ctx, "spec %g %g %g %g\n",
+                  v->attrib[FRAG_ATTRIB_COL1][0],
+                  v->attrib[FRAG_ATTRIB_COL1][1],
+                  v->attrib[FRAG_ATTRIB_COL1][2],
+                  v->attrib[FRAG_ATTRIB_COL1][3]);
+      _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);
+      _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);
+      _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
+      _mesa_debug(ctx, "\n");
+   }
+}
diff --git a/mesalib/src/mesa/swrast/s_context.h b/mesalib/src/mesa/swrast/s_context.h
index 7535832ab..8d7458c2d 100644
--- a/mesalib/src/mesa/swrast/s_context.h
+++ b/mesalib/src/mesa/swrast/s_context.h
@@ -1,349 +1,348 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5.3

- *

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

- *

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

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

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

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

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

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

- *

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

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

- *

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

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

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

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

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

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

- */

-

-

-/**

- * \file swrast/s_context.h

- * \brief Software rasterization context and private types.

- * \author Keith Whitwell <keith@tungstengraphics.com>

- */

-

-/**

- * \mainpage swrast module

- *

- * This module, software rasterization, contains the software fallback

- * routines for drawing points, lines, triangles, bitmaps and images.

- * All rendering boils down to writing spans (arrays) of pixels with

- * particular colors.  The span-writing routines must be implemented

- * by the device driver.

- */

-

-

-#ifndef S_CONTEXT_H

-#define S_CONTEXT_H

-

-#include "main/compiler.h"

-#include "main/mtypes.h"

-#include "program/prog_execute.h"

-#include "swrast.h"

-#include "s_span.h"

-

-

-typedef void (*texture_sample_func)(struct gl_context *ctx,

-                                    const struct gl_texture_object *tObj,

-                                    GLuint n, const GLfloat texcoords[][4],

-                                    const GLfloat lambda[], GLfloat rgba[][4]);

-

-typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,

-                                    const GLubyte mask[],

-                                    GLvoid *src, const GLvoid *dst,

-                                    GLenum chanType);

-

-typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);

-

-typedef void (*swrast_line_func)( struct gl_context *ctx,

-                                  const SWvertex *, const SWvertex *);

-

-typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,

-                                 const SWvertex *, const SWvertex *);

-

-

-typedef void (*validate_texture_image_func)(struct gl_context *ctx,

-                                            struct gl_texture_object *texObj,

-                                            GLuint face, GLuint level);

-

-

-/**

- * \defgroup Bitmasks

- * Bitmasks to indicate which rasterization options are enabled

- * (RasterMask)

- */

-/*@{*/

-#define ALPHATEST_BIT		0x001	/**< Alpha-test pixels */

-#define BLEND_BIT		0x002	/**< Blend pixels */

-#define DEPTH_BIT		0x004	/**< Depth-test pixels */

-#define FOG_BIT			0x008	/**< Fog pixels */

-#define LOGIC_OP_BIT		0x010	/**< Apply logic op in software */

-#define CLIP_BIT		0x020	/**< Scissor or window clip pixels */

-#define STENCIL_BIT		0x040	/**< Stencil pixels */

-#define MASKING_BIT		0x080	/**< Do glColorMask or glIndexMask */

-#define MULTI_DRAW_BIT		0x400	/**< Write to more than one color- */

-                                        /**< buffer or no buffers. */

-#define OCCLUSION_BIT           0x800   /**< GL_HP_occlusion_test enabled */

-#define TEXTURE_BIT		0x1000	/**< Texturing really enabled */

-#define FRAGPROG_BIT            0x2000  /**< Fragment program enabled */

-#define ATIFRAGSHADER_BIT       0x4000  /**< ATI Fragment shader enabled */

-#define CLAMPING_BIT            0x8000  /**< Clamp colors to [0,1] */

-/*@}*/

-

-#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS|	\

-			        _NEW_SCISSOR|	\

-			        _NEW_COLOR|	\

-			        _NEW_DEPTH|	\

-			        _NEW_FOG|	\

-                                _NEW_PROGRAM|   \

-			        _NEW_STENCIL|	\

-			        _NEW_TEXTURE|	\

-			        _NEW_VIEWPORT|	\

-			        _NEW_DEPTH)

-

-

-/**

- * \struct SWcontext

- * \brief  Per-context state that's private to the software rasterizer module.

- */

-typedef struct

-{

-   /** Driver interface:

-    */

-   struct swrast_device_driver Driver;

-

-   /** Configuration mechanisms to make software rasterizer match

-    * characteristics of the hardware rasterizer (if present):

-    */

-   GLboolean AllowVertexFog;

-   GLboolean AllowPixelFog;

-

-   /** Derived values, invalidated on statechanges, updated from

-    * _swrast_validate_derived():

-    */

-   GLbitfield _RasterMask;

-   GLfloat _BackfaceSign;      /** +1 or -1 */

-   GLfloat _BackfaceCullSign;  /** +1, 0, or -1 */

-   GLboolean _PreferPixelFog;    /* Compute fog blend factor per fragment? */

-   GLboolean _TextureCombinePrimary;

-   GLboolean _FogEnabled;

-   GLboolean _DeferredTexture;

-   GLenum _FogMode;  /* either GL_FOG_MODE or fragment program's fog mode */

-

-   /** List/array of the fragment attributes to interpolate */

-   GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];

-   /** Same info, but as a bitmask */

-   GLbitfield _ActiveAttribMask;

-   /** Number of fragment attributes to interpolate */

-   GLuint _NumActiveAttribs;

-   /** Indicates how each attrib is to be interpolated (lines/tris) */

-   GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */

-

-   /* Accum buffer temporaries.

-    */

-   GLboolean _IntegerAccumMode;	/**< Storing unscaled integers? */

-   GLfloat _IntegerAccumScaler;	/**< Implicit scale factor */

-

-   /* Working values:

-    */

-   GLuint StippleCounter;    /**< Line stipple counter */

-   GLuint PointLineFacing;

-   GLbitfield NewState;

-   GLuint StateChanges;

-   GLenum Primitive;    /* current primitive being drawn (ala glBegin) */

-   GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */

-

-   void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );

-

-   /**

-    * When the NewState mask intersects these masks, we invalidate the

-    * Point/Line/Triangle function pointers below.

-    */

-   /*@{*/

-   GLbitfield InvalidatePointMask;

-   GLbitfield InvalidateLineMask;

-   GLbitfield InvalidateTriangleMask;

-   /*@}*/

-

-   /**

-    * Device drivers plug in functions for these callbacks.

-    * Will be called when the GL state change mask intersects the above masks.

-    */

-   /*@{*/

-   void (*choose_point)( struct gl_context * );

-   void (*choose_line)( struct gl_context * );

-   void (*choose_triangle)( struct gl_context * );

-   /*@}*/

-

-   /**

-    * Current point, line and triangle drawing functions.

-    */

-   /*@{*/

-   swrast_point_func Point;

-   swrast_line_func Line;

-   swrast_tri_func Triangle;

-   /*@}*/

-

-   /**

-    * Placeholders for when separate specular (or secondary color) is

-    * enabled but texturing is not.

-    */

-   /*@{*/

-   swrast_point_func SpecPoint;

-   swrast_line_func SpecLine;

-   swrast_tri_func SpecTriangle;

-   /*@}*/

-

-   /**

-    * Typically, we'll allocate a sw_span structure as a local variable

-    * and set its 'array' pointer to point to this object.  The reason is

-    * this object is big and causes problems when allocated on the stack

-    * on some systems.

-    */

-   SWspanarrays *SpanArrays;

-   SWspanarrays *ZoomedArrays;  /**< For pixel zooming */

-

-   /**

-    * Used to buffer N GL_POINTS, instead of rendering one by one.

-    */

-   SWspan PointSpan;

-

-   /** Internal hooks, kept up to date by the same mechanism as above.

-    */

-   blend_func BlendFunc;

-   texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];

-

-   /** Buffer for saving the sampled texture colors.

-    * Needed for GL_ARB_texture_env_crossbar implementation.

-    */

-   GLfloat *TexelBuffer;

-

-   validate_texture_image_func ValidateTextureImage;

-

-   /** State used during execution of fragment programs */

-   struct gl_program_machine FragProgMachine;

-

-} SWcontext;

-

-

-extern void

-_swrast_validate_derived( struct gl_context *ctx );

-

-extern void

-_swrast_update_texture_samplers(struct gl_context *ctx);

-

-

-/** Return SWcontext for the given struct gl_context */

-static INLINE SWcontext *

-SWRAST_CONTEXT(struct gl_context *ctx)

-{

-   return (SWcontext *) ctx->swrast_context;

-}

-

-/** const version of above */

-static INLINE const SWcontext *

-CONST_SWRAST_CONTEXT(const struct gl_context *ctx)

-{

-   return (const SWcontext *) ctx->swrast_context;

-}

-

-

-/**

- * Called prior to framebuffer reading/writing.

- * For drivers that rely on swrast for fallback rendering, this is the

- * driver's opportunity to map renderbuffers and textures.

- */

-static INLINE void

-swrast_render_start(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderStart)

-      swrast->Driver.SpanRenderStart(ctx);

-}

-

-

-/** Called after framebuffer reading/writing */

-static INLINE void

-swrast_render_finish(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderFinish)

-      swrast->Driver.SpanRenderFinish(ctx);

-}

-

-

-

-/**

- * Size of an RGBA pixel, in bytes, for given datatype.

- */

-#define RGBA_PIXEL_SIZE(TYPE)                                     \

-         ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) :      \

-          ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort)     \

-           : 4 * sizeof(GLfloat)))

-

-

-

-/*

- * Fixed point arithmetic macros

- */

-#ifndef FIXED_FRAC_BITS

-#define FIXED_FRAC_BITS 11

-#endif

-

-#define FIXED_SHIFT     FIXED_FRAC_BITS

-#define FIXED_ONE       (1 << FIXED_SHIFT)

-#define FIXED_HALF      (1 << (FIXED_SHIFT-1))

-#define FIXED_FRAC_MASK (FIXED_ONE - 1)

-#define FIXED_INT_MASK  (~FIXED_FRAC_MASK)

-#define FIXED_EPSILON   1

-#define FIXED_SCALE     ((float) FIXED_ONE)

-#define FIXED_DBL_SCALE ((double) FIXED_ONE)

-#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))

-#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))

-#define IntToFixed(I)   ((I) << FIXED_SHIFT)

-#define FixedToInt(X)   ((X) >> FIXED_SHIFT)

-#define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)

-#define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)

-#define FixedFloor(X)   ((X) & FIXED_INT_MASK)

-#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))

-#define PosFloatToFixed(X)      FloatToFixed(X)

-#define SignedFloatToFixed(X)   FloatToFixed(X)

-

-

-

-/*

- * XXX these macros are just bandages for now in order to make

- * CHAN_BITS==32 compile cleanly.

- * These should probably go elsewhere at some point.

- */

-#if CHAN_TYPE == GL_FLOAT

-#define ChanToFixed(X)  (X)

-#define FixedToChan(X)  (X)

-#else

-#define ChanToFixed(X)  IntToFixed(X)

-#define FixedToChan(X)  FixedToInt(X)

-#endif

-

-

-/**

- * For looping over fragment attributes in the pointe, line

- * triangle rasterizers.

- */

-#define ATTRIB_LOOP_BEGIN                                \

-   {                                                     \

-      GLuint a;                                          \

-      for (a = 0; a < swrast->_NumActiveAttribs; a++) {  \

-         const GLuint attr = swrast->_ActiveAttribs[a];

-

-#define ATTRIB_LOOP_END } }

-

-

-

-#endif

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.3
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file swrast/s_context.h
+ * \brief Software rasterization context and private types.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+/**
+ * \mainpage swrast module
+ *
+ * This module, software rasterization, contains the software fallback
+ * routines for drawing points, lines, triangles, bitmaps and images.
+ * All rendering boils down to writing spans (arrays) of pixels with
+ * particular colors.  The span-writing routines must be implemented
+ * by the device driver.
+ */
+
+
+#ifndef S_CONTEXT_H
+#define S_CONTEXT_H
+
+#include "main/compiler.h"
+#include "main/mtypes.h"
+#include "program/prog_execute.h"
+#include "swrast.h"
+#include "s_span.h"
+
+
+typedef void (*texture_sample_func)(struct gl_context *ctx,
+                                    const struct gl_texture_object *tObj,
+                                    GLuint n, const GLfloat texcoords[][4],
+                                    const GLfloat lambda[], GLfloat rgba[][4]);
+
+typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,
+                                    const GLubyte mask[],
+                                    GLvoid *src, const GLvoid *dst,
+                                    GLenum chanType);
+
+typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
+
+typedef void (*swrast_line_func)( struct gl_context *ctx,
+                                  const SWvertex *, const SWvertex *);
+
+typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
+                                 const SWvertex *, const SWvertex *);
+
+
+typedef void (*validate_texture_image_func)(struct gl_context *ctx,
+                                            struct gl_texture_object *texObj,
+                                            GLuint face, GLuint level);
+
+
+/**
+ * \defgroup Bitmasks
+ * Bitmasks to indicate which rasterization options are enabled
+ * (RasterMask)
+ */
+/*@{*/
+#define ALPHATEST_BIT		0x001	/**< Alpha-test pixels */
+#define BLEND_BIT		0x002	/**< Blend pixels */
+#define DEPTH_BIT		0x004	/**< Depth-test pixels */
+#define FOG_BIT			0x008	/**< Fog pixels */
+#define LOGIC_OP_BIT		0x010	/**< Apply logic op in software */
+#define CLIP_BIT		0x020	/**< Scissor or window clip pixels */
+#define STENCIL_BIT		0x040	/**< Stencil pixels */
+#define MASKING_BIT		0x080	/**< Do glColorMask or glIndexMask */
+#define MULTI_DRAW_BIT		0x400	/**< Write to more than one color- */
+                                        /**< buffer or no buffers. */
+#define OCCLUSION_BIT           0x800   /**< GL_HP_occlusion_test enabled */
+#define TEXTURE_BIT		0x1000	/**< Texturing really enabled */
+#define FRAGPROG_BIT            0x2000  /**< Fragment program enabled */
+#define ATIFRAGSHADER_BIT       0x4000  /**< ATI Fragment shader enabled */
+#define CLAMPING_BIT            0x8000  /**< Clamp colors to [0,1] */
+/*@}*/
+
+#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS|	\
+			        _NEW_SCISSOR|	\
+			        _NEW_COLOR|	\
+			        _NEW_DEPTH|	\
+			        _NEW_FOG|	\
+                                _NEW_PROGRAM|   \
+			        _NEW_STENCIL|	\
+			        _NEW_TEXTURE|	\
+			        _NEW_VIEWPORT|	\
+			        _NEW_DEPTH)
+
+
+/**
+ * \struct SWcontext
+ * \brief  Per-context state that's private to the software rasterizer module.
+ */
+typedef struct
+{
+   /** Driver interface:
+    */
+   struct swrast_device_driver Driver;
+
+   /** Configuration mechanisms to make software rasterizer match
+    * characteristics of the hardware rasterizer (if present):
+    */
+   GLboolean AllowVertexFog;
+   GLboolean AllowPixelFog;
+
+   /** Derived values, invalidated on statechanges, updated from
+    * _swrast_validate_derived():
+    */
+   GLbitfield _RasterMask;
+   GLfloat _BackfaceSign;      /** +1 or -1 */
+   GLfloat _BackfaceCullSign;  /** +1, 0, or -1 */
+   GLboolean _PreferPixelFog;    /* Compute fog blend factor per fragment? */
+   GLboolean _TextureCombinePrimary;
+   GLboolean _FogEnabled;
+   GLboolean _DeferredTexture;
+
+   /** List/array of the fragment attributes to interpolate */
+   GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
+   /** Same info, but as a bitmask */
+   GLbitfield _ActiveAttribMask;
+   /** Number of fragment attributes to interpolate */
+   GLuint _NumActiveAttribs;
+   /** Indicates how each attrib is to be interpolated (lines/tris) */
+   GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
+
+   /* Accum buffer temporaries.
+    */
+   GLboolean _IntegerAccumMode;	/**< Storing unscaled integers? */
+   GLfloat _IntegerAccumScaler;	/**< Implicit scale factor */
+
+   /* Working values:
+    */
+   GLuint StippleCounter;    /**< Line stipple counter */
+   GLuint PointLineFacing;
+   GLbitfield NewState;
+   GLuint StateChanges;
+   GLenum Primitive;    /* current primitive being drawn (ala glBegin) */
+   GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
+
+   void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
+
+   /**
+    * When the NewState mask intersects these masks, we invalidate the
+    * Point/Line/Triangle function pointers below.
+    */
+   /*@{*/
+   GLbitfield InvalidatePointMask;
+   GLbitfield InvalidateLineMask;
+   GLbitfield InvalidateTriangleMask;
+   /*@}*/
+
+   /**
+    * Device drivers plug in functions for these callbacks.
+    * Will be called when the GL state change mask intersects the above masks.
+    */
+   /*@{*/
+   void (*choose_point)( struct gl_context * );
+   void (*choose_line)( struct gl_context * );
+   void (*choose_triangle)( struct gl_context * );
+   /*@}*/
+
+   /**
+    * Current point, line and triangle drawing functions.
+    */
+   /*@{*/
+   swrast_point_func Point;
+   swrast_line_func Line;
+   swrast_tri_func Triangle;
+   /*@}*/
+
+   /**
+    * Placeholders for when separate specular (or secondary color) is
+    * enabled but texturing is not.
+    */
+   /*@{*/
+   swrast_point_func SpecPoint;
+   swrast_line_func SpecLine;
+   swrast_tri_func SpecTriangle;
+   /*@}*/
+
+   /**
+    * Typically, we'll allocate a sw_span structure as a local variable
+    * and set its 'array' pointer to point to this object.  The reason is
+    * this object is big and causes problems when allocated on the stack
+    * on some systems.
+    */
+   SWspanarrays *SpanArrays;
+   SWspanarrays *ZoomedArrays;  /**< For pixel zooming */
+
+   /**
+    * Used to buffer N GL_POINTS, instead of rendering one by one.
+    */
+   SWspan PointSpan;
+
+   /** Internal hooks, kept up to date by the same mechanism as above.
+    */
+   blend_func BlendFunc;
+   texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
+
+   /** Buffer for saving the sampled texture colors.
+    * Needed for GL_ARB_texture_env_crossbar implementation.
+    */
+   GLfloat *TexelBuffer;
+
+   validate_texture_image_func ValidateTextureImage;
+
+   /** State used during execution of fragment programs */
+   struct gl_program_machine FragProgMachine;
+
+} SWcontext;
+
+
+extern void
+_swrast_validate_derived( struct gl_context *ctx );
+
+extern void
+_swrast_update_texture_samplers(struct gl_context *ctx);
+
+
+/** Return SWcontext for the given struct gl_context */
+static INLINE SWcontext *
+SWRAST_CONTEXT(struct gl_context *ctx)
+{
+   return (SWcontext *) ctx->swrast_context;
+}
+
+/** const version of above */
+static INLINE const SWcontext *
+CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
+{
+   return (const SWcontext *) ctx->swrast_context;
+}
+
+
+/**
+ * Called prior to framebuffer reading/writing.
+ * For drivers that rely on swrast for fallback rendering, this is the
+ * driver's opportunity to map renderbuffers and textures.
+ */
+static INLINE void
+swrast_render_start(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderStart)
+      swrast->Driver.SpanRenderStart(ctx);
+}
+
+
+/** Called after framebuffer reading/writing */
+static INLINE void
+swrast_render_finish(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderFinish)
+      swrast->Driver.SpanRenderFinish(ctx);
+}
+
+
+
+/**
+ * Size of an RGBA pixel, in bytes, for given datatype.
+ */
+#define RGBA_PIXEL_SIZE(TYPE)                                     \
+         ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) :      \
+          ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort)     \
+           : 4 * sizeof(GLfloat)))
+
+
+
+/*
+ * Fixed point arithmetic macros
+ */
+#ifndef FIXED_FRAC_BITS
+#define FIXED_FRAC_BITS 11
+#endif
+
+#define FIXED_SHIFT     FIXED_FRAC_BITS
+#define FIXED_ONE       (1 << FIXED_SHIFT)
+#define FIXED_HALF      (1 << (FIXED_SHIFT-1))
+#define FIXED_FRAC_MASK (FIXED_ONE - 1)
+#define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
+#define FIXED_EPSILON   1
+#define FIXED_SCALE     ((float) FIXED_ONE)
+#define FIXED_DBL_SCALE ((double) FIXED_ONE)
+#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
+#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
+#define IntToFixed(I)   ((I) << FIXED_SHIFT)
+#define FixedToInt(X)   ((X) >> FIXED_SHIFT)
+#define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
+#define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
+#define FixedFloor(X)   ((X) & FIXED_INT_MASK)
+#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
+#define PosFloatToFixed(X)      FloatToFixed(X)
+#define SignedFloatToFixed(X)   FloatToFixed(X)
+
+
+
+/*
+ * XXX these macros are just bandages for now in order to make
+ * CHAN_BITS==32 compile cleanly.
+ * These should probably go elsewhere at some point.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ChanToFixed(X)  (X)
+#define FixedToChan(X)  (X)
+#else
+#define ChanToFixed(X)  IntToFixed(X)
+#define FixedToChan(X)  FixedToInt(X)
+#endif
+
+
+/**
+ * For looping over fragment attributes in the pointe, line
+ * triangle rasterizers.
+ */
+#define ATTRIB_LOOP_BEGIN                                \
+   {                                                     \
+      GLuint a;                                          \
+      for (a = 0; a < swrast->_NumActiveAttribs; a++) {  \
+         const GLuint attr = swrast->_ActiveAttribs[a];
+
+#define ATTRIB_LOOP_END } }
+
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_fog.c b/mesalib/src/mesa/swrast/s_fog.c
index 5acb5f4d1..ea59de160 100644
--- a/mesalib/src/mesa/swrast/s_fog.c
+++ b/mesalib/src/mesa/swrast/s_fog.c
@@ -1,244 +1,244 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5.2

- *

- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.

- *

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

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

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

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

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

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

- *

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

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

- *

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

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

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

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

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

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

- */

-

-

-#include "main/glheader.h"

-#include "main/colormac.h"

-#include "main/macros.h"

-

-#include "s_context.h"

-#include "s_fog.h"

-

-

-/**

- * Used to convert current raster distance to a fog factor in [0,1].

- */

-GLfloat

-_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)

-{

-   GLfloat d, f;

-

-   switch (ctx->Fog.Mode) {

-   case GL_LINEAR:

-      if (ctx->Fog.Start == ctx->Fog.End)

-         d = 1.0F;

-      else

-         d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);

-      f = (ctx->Fog.End - z) * d;

-      return CLAMP(f, 0.0F, 1.0F);

-   case GL_EXP:

-      d = ctx->Fog.Density;

-      f = EXPF(-d * z);

-      f = CLAMP(f, 0.0F, 1.0F);

-      return f;

-   case GL_EXP2:

-      d = ctx->Fog.Density;

-      f = EXPF(-(d * d * z * z));

-      f = CLAMP(f, 0.0F, 1.0F);

-      return f;

-   default:

-      _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");

-      return 0.0; 

-   }

-}

-

-

-#define LINEAR_FOG(f, coord)  f = (fogEnd - coord) * fogScale

-

-#define EXP_FOG(f, coord)  f = EXPF(density * coord)

-

-#define EXP2_FOG(f, coord)				\

-do {							\

-   GLfloat tmp = negDensitySquared * coord * coord;	\

-   if (tmp < FLT_MIN_10_EXP)				\

-      tmp = FLT_MIN_10_EXP;				\

-   f = EXPF(tmp);					\

- } while(0)

-

-

-#define BLEND_FOG(f, coord)  f = coord

-

-

-

-/**

- * Template code for computing fog blend factor and applying it to colors.

- * \param TYPE  either GLubyte, GLushort or GLfloat.

- * \param COMPUTE_F  code to compute the fog blend factor, f.

- */

-#define FOG_LOOP(TYPE, FOG_FUNC)						\

-if (span->arrayAttribs & FRAG_BIT_FOGC) {					\

-   GLuint i;									\

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

-      const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0];	\

-      const GLfloat c = FABSF(fogCoord);					\

-      GLfloat f, oneMinusF;							\

-      FOG_FUNC(f, c);								\

-      f = CLAMP(f, 0.0F, 1.0F);							\

-      oneMinusF = 1.0F - f;							\

-      rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog);		\

-      rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog);		\

-      rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog);		\

-   }										\

-}										\

-else {										\

-   const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0];		\

-   GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0];			\

-   const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3];			\

-   GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3];				\

-   GLuint i;									\

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

-      const GLfloat c = FABSF(fogCoord) / w;					\

-      GLfloat f, oneMinusF;							\

-      FOG_FUNC(f, c);								\

-      f = CLAMP(f, 0.0F, 1.0F);							\

-      oneMinusF = 1.0F - f;							\

-      rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog);		\

-      rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog);		\

-      rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog);		\

-      fogCoord += fogStep;							\

-      w += wStep;								\

-   }										\

-}

-

-/**

- * Apply fog to a span of RGBA pixels.

- * The fog value are either in the span->array->fog array or interpolated from

- * the fog/fogStep values.

- * They fog values are either fog coordinates (Z) or fog blend factors.

- * _PreferPixelFog should be in sync with that state!

- */

-void

-_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )

-{

-   const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);

-   GLfloat rFog, gFog, bFog;

-

-   ASSERT(swrast->_FogEnabled);

-   ASSERT(span->arrayMask & SPAN_RGBA);

-

-   /* compute (scaled) fog color */

-   if (span->array->ChanType == GL_UNSIGNED_BYTE) {

-      rFog = ctx->Fog.Color[RCOMP] * 255.0F;

-      gFog = ctx->Fog.Color[GCOMP] * 255.0F;

-      bFog = ctx->Fog.Color[BCOMP] * 255.0F;

-   }

-   else if (span->array->ChanType == GL_UNSIGNED_SHORT) {

-      rFog = ctx->Fog.Color[RCOMP] * 65535.0F;

-      gFog = ctx->Fog.Color[GCOMP] * 65535.0F;

-      bFog = ctx->Fog.Color[BCOMP] * 65535.0F;

-   }

-   else {

-      rFog = ctx->Fog.Color[RCOMP];

-      gFog = ctx->Fog.Color[GCOMP];

-      bFog = ctx->Fog.Color[BCOMP];

-   }

-

-   if (swrast->_PreferPixelFog) {

-      /* The span's fog values are fog coordinates, now compute blend factors

-       * and blend the fragment colors with the fog color.

-       */

-      switch (swrast->_FogMode) {

-      case GL_LINEAR:

-         {

-            const GLfloat fogEnd = ctx->Fog.End;

-            const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)

-               ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);

-            if (span->array->ChanType == GL_UNSIGNED_BYTE) {

-               GLubyte (*rgba)[4] = span->array->rgba8;

-               FOG_LOOP(GLubyte, LINEAR_FOG);

-            }

-            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {

-               GLushort (*rgba)[4] = span->array->rgba16;

-               FOG_LOOP(GLushort, LINEAR_FOG);

-            }

-            else {

-               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];

-               ASSERT(span->array->ChanType == GL_FLOAT);

-               FOG_LOOP(GLfloat, LINEAR_FOG);

-            }

-         }

-         break;

-

-      case GL_EXP:

-         {

-            const GLfloat density = -ctx->Fog.Density;

-            if (span->array->ChanType == GL_UNSIGNED_BYTE) {

-               GLubyte (*rgba)[4] = span->array->rgba8;

-               FOG_LOOP(GLubyte, EXP_FOG);

-            }

-            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {

-               GLushort (*rgba)[4] = span->array->rgba16;

-               FOG_LOOP(GLushort, EXP_FOG);

-            }

-            else {

-               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];

-               ASSERT(span->array->ChanType == GL_FLOAT);

-               FOG_LOOP(GLfloat, EXP_FOG);

-            }

-         }

-         break;

-

-      case GL_EXP2:

-         {

-            const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;

-            if (span->array->ChanType == GL_UNSIGNED_BYTE) {

-               GLubyte (*rgba)[4] = span->array->rgba8;

-               FOG_LOOP(GLubyte, EXP2_FOG);

-            }

-            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {

-               GLushort (*rgba)[4] = span->array->rgba16;

-               FOG_LOOP(GLushort, EXP2_FOG);

-            }

-            else {

-               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];

-               ASSERT(span->array->ChanType == GL_FLOAT);

-               FOG_LOOP(GLfloat, EXP2_FOG);

-            }

-         }

-         break;

-

-      default:

-         _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");

-         return;

-      }

-   }

-   else {

-      /* The span's fog start/step/array values are blend factors in [0,1].

-       * They were previously computed per-vertex.

-       */

-      if (span->array->ChanType == GL_UNSIGNED_BYTE) {

-         GLubyte (*rgba)[4] = span->array->rgba8;

-         FOG_LOOP(GLubyte, BLEND_FOG);

-      }

-      else if (span->array->ChanType == GL_UNSIGNED_SHORT) {

-         GLushort (*rgba)[4] = span->array->rgba16;

-         FOG_LOOP(GLushort, BLEND_FOG);

-      }

-      else {

-         GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];

-         ASSERT(span->array->ChanType == GL_FLOAT);

-         FOG_LOOP(GLfloat, BLEND_FOG);

-      }

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.2
+ *
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_fog.h"
+
+
+/**
+ * Used to convert current raster distance to a fog factor in [0,1].
+ */
+GLfloat
+_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)
+{
+   GLfloat d, f;
+
+   switch (ctx->Fog.Mode) {
+   case GL_LINEAR:
+      if (ctx->Fog.Start == ctx->Fog.End)
+         d = 1.0F;
+      else
+         d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+      f = (ctx->Fog.End - z) * d;
+      return CLAMP(f, 0.0F, 1.0F);
+   case GL_EXP:
+      d = ctx->Fog.Density;
+      f = EXPF(-d * z);
+      f = CLAMP(f, 0.0F, 1.0F);
+      return f;
+   case GL_EXP2:
+      d = ctx->Fog.Density;
+      f = EXPF(-(d * d * z * z));
+      f = CLAMP(f, 0.0F, 1.0F);
+      return f;
+   default:
+      _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");
+      return 0.0; 
+   }
+}
+
+
+#define LINEAR_FOG(f, coord)  f = (fogEnd - coord) * fogScale
+
+#define EXP_FOG(f, coord)  f = EXPF(density * coord)
+
+#define EXP2_FOG(f, coord)				\
+do {							\
+   GLfloat tmp = negDensitySquared * coord * coord;	\
+   if (tmp < FLT_MIN_10_EXP)				\
+      tmp = FLT_MIN_10_EXP;				\
+   f = EXPF(tmp);					\
+ } while(0)
+
+
+#define BLEND_FOG(f, coord)  f = coord
+
+
+
+/**
+ * Template code for computing fog blend factor and applying it to colors.
+ * \param TYPE  either GLubyte, GLushort or GLfloat.
+ * \param COMPUTE_F  code to compute the fog blend factor, f.
+ */
+#define FOG_LOOP(TYPE, FOG_FUNC)						\
+if (span->arrayAttribs & FRAG_BIT_FOGC) {					\
+   GLuint i;									\
+   for (i = 0; i < span->end; i++) {						\
+      const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0];	\
+      const GLfloat c = FABSF(fogCoord);					\
+      GLfloat f, oneMinusF;							\
+      FOG_FUNC(f, c);								\
+      f = CLAMP(f, 0.0F, 1.0F);							\
+      oneMinusF = 1.0F - f;							\
+      rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog);		\
+      rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog);		\
+      rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog);		\
+   }										\
+}										\
+else {										\
+   const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0];		\
+   GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0];			\
+   const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3];			\
+   GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3];				\
+   GLuint i;									\
+   for (i = 0; i < span->end; i++) {						\
+      const GLfloat c = FABSF(fogCoord) / w;					\
+      GLfloat f, oneMinusF;							\
+      FOG_FUNC(f, c);								\
+      f = CLAMP(f, 0.0F, 1.0F);							\
+      oneMinusF = 1.0F - f;							\
+      rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog);		\
+      rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog);		\
+      rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog);		\
+      fogCoord += fogStep;							\
+      w += wStep;								\
+   }										\
+}
+
+/**
+ * Apply fog to a span of RGBA pixels.
+ * The fog value are either in the span->array->fog array or interpolated from
+ * the fog/fogStep values.
+ * They fog values are either fog coordinates (Z) or fog blend factors.
+ * _PreferPixelFog should be in sync with that state!
+ */
+void
+_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )
+{
+   const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);
+   GLfloat rFog, gFog, bFog;
+
+   ASSERT(swrast->_FogEnabled);
+   ASSERT(span->arrayMask & SPAN_RGBA);
+
+   /* compute (scaled) fog color */
+   if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+      rFog = ctx->Fog.Color[RCOMP] * 255.0F;
+      gFog = ctx->Fog.Color[GCOMP] * 255.0F;
+      bFog = ctx->Fog.Color[BCOMP] * 255.0F;
+   }
+   else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+      rFog = ctx->Fog.Color[RCOMP] * 65535.0F;
+      gFog = ctx->Fog.Color[GCOMP] * 65535.0F;
+      bFog = ctx->Fog.Color[BCOMP] * 65535.0F;
+   }
+   else {
+      rFog = ctx->Fog.Color[RCOMP];
+      gFog = ctx->Fog.Color[GCOMP];
+      bFog = ctx->Fog.Color[BCOMP];
+   }
+
+   if (swrast->_PreferPixelFog) {
+      /* The span's fog values are fog coordinates, now compute blend factors
+       * and blend the fragment colors with the fog color.
+       */
+      switch (ctx->Fog.Mode) {
+      case GL_LINEAR:
+         {
+            const GLfloat fogEnd = ctx->Fog.End;
+            const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
+               ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+            if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+               GLubyte (*rgba)[4] = span->array->rgba8;
+               FOG_LOOP(GLubyte, LINEAR_FOG);
+            }
+            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+               GLushort (*rgba)[4] = span->array->rgba16;
+               FOG_LOOP(GLushort, LINEAR_FOG);
+            }
+            else {
+               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+               ASSERT(span->array->ChanType == GL_FLOAT);
+               FOG_LOOP(GLfloat, LINEAR_FOG);
+            }
+         }
+         break;
+
+      case GL_EXP:
+         {
+            const GLfloat density = -ctx->Fog.Density;
+            if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+               GLubyte (*rgba)[4] = span->array->rgba8;
+               FOG_LOOP(GLubyte, EXP_FOG);
+            }
+            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+               GLushort (*rgba)[4] = span->array->rgba16;
+               FOG_LOOP(GLushort, EXP_FOG);
+            }
+            else {
+               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+               ASSERT(span->array->ChanType == GL_FLOAT);
+               FOG_LOOP(GLfloat, EXP_FOG);
+            }
+         }
+         break;
+
+      case GL_EXP2:
+         {
+            const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
+            if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+               GLubyte (*rgba)[4] = span->array->rgba8;
+               FOG_LOOP(GLubyte, EXP2_FOG);
+            }
+            else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+               GLushort (*rgba)[4] = span->array->rgba16;
+               FOG_LOOP(GLushort, EXP2_FOG);
+            }
+            else {
+               GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+               ASSERT(span->array->ChanType == GL_FLOAT);
+               FOG_LOOP(GLfloat, EXP2_FOG);
+            }
+         }
+         break;
+
+      default:
+         _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
+         return;
+      }
+   }
+   else {
+      /* The span's fog start/step/array values are blend factors in [0,1].
+       * They were previously computed per-vertex.
+       */
+      if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+         GLubyte (*rgba)[4] = span->array->rgba8;
+         FOG_LOOP(GLubyte, BLEND_FOG);
+      }
+      else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+         GLushort (*rgba)[4] = span->array->rgba16;
+         FOG_LOOP(GLushort, BLEND_FOG);
+      }
+      else {
+         GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+         ASSERT(span->array->ChanType == GL_FLOAT);
+         FOG_LOOP(GLfloat, BLEND_FOG);
+      }
+   }
+}
diff --git a/mesalib/src/mesa/swrast/s_readpix.c b/mesalib/src/mesa/swrast/s_readpix.c
index 5c8d7e9c5..214f2ea1a 100644
--- a/mesalib/src/mesa/swrast/s_readpix.c
+++ b/mesalib/src/mesa/swrast/s_readpix.c
@@ -191,7 +191,13 @@ fast_read_rgba_pixels( struct gl_context *ctx,
    if (!rb)
       return GL_FALSE;
 
-   ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB ||
+   ASSERT(rb->_BaseFormat == GL_RGBA ||
+	  rb->_BaseFormat == GL_RGB ||
+	  rb->_BaseFormat == GL_RG ||
+	  rb->_BaseFormat == GL_RED ||
+	  rb->_BaseFormat == GL_LUMINANCE ||
+	  rb->_BaseFormat == GL_INTENSITY ||
+	  rb->_BaseFormat == GL_LUMINANCE_ALPHA ||
 	  rb->_BaseFormat == GL_ALPHA);
 
    /* clipping should have already been done */
@@ -312,12 +318,12 @@ read_rgba_pixels( struct gl_context *ctx,
    if (!rb)
       return;
 
-   if (type == GL_FLOAT && ((ctx->Color.ClampReadColor == GL_TRUE) ||
-                            (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB &&
-                             rb->DataType != GL_FLOAT)))
+   if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
+       !_mesa_is_integer_format(format)) {
       transferOps |= IMAGE_CLAMP_BIT;
+   }
 
-   /* Try optimized path first */
+   /* Try the optimized path first. */
    if (fast_read_rgba_pixels(ctx, x, y, width, height,
                              format, type, pixels, packing, transferOps)) {
       return; /* done! */
@@ -341,9 +347,9 @@ read_rgba_pixels( struct gl_context *ctx,
          _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
 
          /* apply fudge factor for shallow color buffers */
-         if (fb->Visual.redBits < 8 ||
-             fb->Visual.greenBits < 8 ||
-             fb->Visual.blueBits < 8) {
+         if ((fb->Visual.redBits < 8 && fb->Visual.redBits != 0) ||
+             (fb->Visual.greenBits < 8 && fb->Visual.greenBits != 0) ||
+	     (fb->Visual.blueBits < 8 && fb->Visual.blueBits != 0)) {
             adjust_colors(fb, width, rgba);
          }
 
diff --git a/mesalib/src/mesa/swrast/s_span.c b/mesalib/src/mesa/swrast/s_span.c
index 9cfecc9e3..f0524e061 100644
--- a/mesalib/src/mesa/swrast/s_span.c
+++ b/mesalib/src/mesa/swrast/s_span.c
@@ -1348,7 +1348,13 @@ _swrast_read_rgba_span( struct gl_context *ctx, struct gl_renderbuffer *rb,
 
       ASSERT(rb);
       ASSERT(rb->GetRow);
-      ASSERT(rb->_BaseFormat == GL_RGB || rb->_BaseFormat == GL_RGBA ||
+      ASSERT(rb->_BaseFormat == GL_RGBA ||
+	     rb->_BaseFormat == GL_RGB ||
+	     rb->_BaseFormat == GL_RG ||
+	     rb->_BaseFormat == GL_RED ||
+	     rb->_BaseFormat == GL_LUMINANCE ||
+	     rb->_BaseFormat == GL_INTENSITY ||
+	     rb->_BaseFormat == GL_LUMINANCE_ALPHA ||
 	     rb->_BaseFormat == GL_ALPHA);
 
       if (rb->DataType == dstType) {