Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 2119 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/pixel.c b/nx-X11/extras/Mesa/src/mesa/main/pixel.c
new file mode 100644
index 000000000..d2edd0ecb
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/pixel.c
@@ -0,0 +1,2119 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "colormac.h"
+#include "context.h"
+#include "image.h"
+#include "macros.h"
+#include "pixel.h"
+#include "mtypes.h"
+
+
+/**********************************************************************/
+/*****                    glPixelZoom                             *****/
+/**********************************************************************/
+
+
+
+void GLAPIENTRY
+_mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (ctx->Pixel.ZoomX == xfactor &&
+       ctx->Pixel.ZoomY == yfactor)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+   ctx->Pixel.ZoomX = xfactor;
+   ctx->Pixel.ZoomY = yfactor;
+}
+
+
+
+/**********************************************************************/
+/*****                    glPixelStore                            *****/
+/**********************************************************************/
+
+
+void GLAPIENTRY
+_mesa_PixelStorei( GLenum pname, GLint param )
+{
+   /* NOTE: this call can't be compiled into the display list */
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (pname) {
+      case GL_PACK_SWAP_BYTES:
+	 if (param == (GLint)ctx->Pack.SwapBytes)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+         ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
+	 break;
+      case GL_PACK_LSB_FIRST:
+	 if (param == (GLint)ctx->Pack.LsbFirst)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+         ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
+	 break;
+      case GL_PACK_ROW_LENGTH:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.RowLength == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.RowLength = param;
+	 break;
+      case GL_PACK_IMAGE_HEIGHT:
+         if (param<0) {
+            _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.ImageHeight == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.ImageHeight = param;
+         break;
+      case GL_PACK_SKIP_PIXELS:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.SkipPixels == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.SkipPixels = param;
+	 break;
+      case GL_PACK_SKIP_ROWS:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.SkipRows == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.SkipRows = param;
+	 break;
+      case GL_PACK_SKIP_IMAGES:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.SkipImages == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.SkipImages = param;
+	 break;
+      case GL_PACK_ALIGNMENT:
+         if (param!=1 && param!=2 && param!=4 && param!=8) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Pack.Alignment == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Pack.Alignment = param;
+	 break;
+      case GL_PACK_INVERT_MESA:
+         if (!ctx->Extensions.MESA_pack_invert) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" );
+            return;
+         }
+         if (ctx->Pack.Invert == param)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+         ctx->Pack.Invert = param;
+         break;
+
+      case GL_UNPACK_SWAP_BYTES:
+	 if (param == (GLint)ctx->Unpack.SwapBytes)
+	    return;
+	 if ((GLint)ctx->Unpack.SwapBytes == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
+         break;
+      case GL_UNPACK_LSB_FIRST:
+	 if (param == (GLint)ctx->Unpack.LsbFirst)
+	    return;
+	 if ((GLint)ctx->Unpack.LsbFirst == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
+	 break;
+      case GL_UNPACK_ROW_LENGTH:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Unpack.RowLength == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.RowLength = param;
+	 break;
+      case GL_UNPACK_IMAGE_HEIGHT:
+         if (param<0) {
+            _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Unpack.ImageHeight == param)
+	    return;
+
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.ImageHeight = param;
+         break;
+      case GL_UNPACK_SKIP_PIXELS:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Unpack.SkipPixels == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.SkipPixels = param;
+	 break;
+      case GL_UNPACK_SKIP_ROWS:
+	 if (param<0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Unpack.SkipRows == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.SkipRows = param;
+	 break;
+      case GL_UNPACK_SKIP_IMAGES:
+	 if (param < 0) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+	    return;
+	 }
+	 if (ctx->Unpack.SkipImages == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.SkipImages = param;
+	 break;
+      case GL_UNPACK_ALIGNMENT:
+         if (param!=1 && param!=2 && param!=4 && param!=8) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
+	    return;
+	 }
+	 if (ctx->Unpack.Alignment == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+	 ctx->Unpack.Alignment = param;
+	 break;
+      case GL_UNPACK_CLIENT_STORAGE_APPLE:
+         if (param == (GLint)ctx->Unpack.ClientStorage)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
+         ctx->Unpack.ClientStorage = param ? GL_TRUE : GL_FALSE;
+         break;
+      default:
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
+	 return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_PixelStoref( GLenum pname, GLfloat param )
+{
+   _mesa_PixelStorei( pname, (GLint) param );
+}
+
+
+
+/**********************************************************************/
+/*****                         glPixelMap                         *****/
+/**********************************************************************/
+
+
+/**
+ * Helper routine used by the other _mesa_PixelMap() functions.
+ */
+static void
+pixelmap(GLcontext *ctx, GLenum map, GLsizei mapsize, const GLfloat *values)
+{
+   GLint i;
+   switch (map) {
+      case GL_PIXEL_MAP_S_TO_S:
+         ctx->Pixel.MapStoSsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapStoS[i] = IROUND(values[i]);
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_I:
+         ctx->Pixel.MapItoIsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapItoI[i] = values[i];
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_R:
+         ctx->Pixel.MapItoRsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+            GLfloat val = CLAMP( values[i], 0.0F, 1.0F );
+	    ctx->Pixel.MapItoR[i] = val;
+	    ctx->Pixel.MapItoR8[i] = (GLint) (val * 255.0F);
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_G:
+         ctx->Pixel.MapItoGsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+            GLfloat val = CLAMP( values[i], 0.0F, 1.0F );
+	    ctx->Pixel.MapItoG[i] = val;
+	    ctx->Pixel.MapItoG8[i] = (GLint) (val * 255.0F);
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_B:
+         ctx->Pixel.MapItoBsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+            GLfloat val = CLAMP( values[i], 0.0F, 1.0F );
+	    ctx->Pixel.MapItoB[i] = val;
+	    ctx->Pixel.MapItoB8[i] = (GLint) (val * 255.0F);
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_A:
+         ctx->Pixel.MapItoAsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+            GLfloat val = CLAMP( values[i], 0.0F, 1.0F );
+	    ctx->Pixel.MapItoA[i] = val;
+	    ctx->Pixel.MapItoA8[i] = (GLint) (val * 255.0F);
+	 }
+	 break;
+      case GL_PIXEL_MAP_R_TO_R:
+         ctx->Pixel.MapRtoRsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapRtoR[i] = CLAMP( values[i], 0.0F, 1.0F );
+	 }
+	 break;
+      case GL_PIXEL_MAP_G_TO_G:
+         ctx->Pixel.MapGtoGsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapGtoG[i] = CLAMP( values[i], 0.0F, 1.0F );
+	 }
+	 break;
+      case GL_PIXEL_MAP_B_TO_B:
+         ctx->Pixel.MapBtoBsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapBtoB[i] = CLAMP( values[i], 0.0F, 1.0F );
+	 }
+	 break;
+      case GL_PIXEL_MAP_A_TO_A:
+         ctx->Pixel.MapAtoAsize = mapsize;
+         for (i = 0; i < mapsize; i++) {
+	    ctx->Pixel.MapAtoA[i] = CLAMP( values[i], 0.0F, 1.0F );
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glPixelMap(map)" );
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_PixelMapfv( GLenum map, GLsizei mapsize, const GLfloat *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   /* XXX someday, test against ctx->Const.MaxPixelMapTableSize */
+   if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
+      return;
+   }
+
+   if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
+      /* test that mapsize is a power of two */
+      if (_mesa_bitcount((GLuint) mapsize) != 1) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack pixelmap from PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Unpack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Unpack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_FLOAT, values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapfv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapfv(PBO is mapped)");
+         return;
+      }
+      values = (const GLfloat *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+   pixelmap(ctx, map, mapsize, values);
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_PixelMapuiv(GLenum map, GLsizei mapsize, const GLuint *values )
+{
+   GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
+      return;
+   }
+
+   if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
+      /* test that mapsize is a power of two */
+      if (_mesa_bitcount((GLuint) mapsize) != 1) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack pixelmap from PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Unpack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Unpack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_UNSIGNED_INT, values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapuiv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapuiv(PBO is mapped)");
+         return;
+      }
+      values = (const GLuint *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+   /* convert to floats */
+   if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
+      GLint i;
+      for (i = 0; i < mapsize; i++) {
+         fvalues[i] = (GLfloat) values[i];
+      }
+   }
+   else {
+      GLint i;
+      for (i = 0; i < mapsize; i++) {
+         fvalues[i] = UINT_TO_FLOAT( values[i] );
+      }
+   }
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+
+   pixelmap(ctx, map, mapsize, fvalues);
+}
+
+
+
+void GLAPIENTRY
+_mesa_PixelMapusv(GLenum map, GLsizei mapsize, const GLushort *values )
+{
+   GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapusv(mapsize)" );
+      return;
+   }
+
+   if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
+      /* test that mapsize is a power of two */
+      if (_mesa_bitcount((GLuint) mapsize) != 1) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack pixelmap from PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Unpack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Unpack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_UNSIGNED_SHORT,
+                                     values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapusv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapusv(PBO is mapped)");
+         return;
+      }
+      values = (const GLushort *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+    /* convert to floats */
+   if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
+      GLint i;
+      for (i = 0; i < mapsize; i++) {
+         fvalues[i] = (GLfloat) values[i];
+      }
+   }
+   else {
+      GLint i;
+      for (i = 0; i < mapsize; i++) {
+         fvalues[i] = USHORT_TO_FLOAT( values[i] );
+      }
+   }
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+
+   pixelmap(ctx, map, mapsize, fvalues);
+}
+
+
+/**
+ * Return size of the named map.
+ */
+static GLuint
+get_map_size(GLcontext *ctx, GLenum map)
+{
+   switch (map) {
+      case GL_PIXEL_MAP_I_TO_I:
+         return ctx->Pixel.MapItoIsize;
+      case GL_PIXEL_MAP_S_TO_S:
+         return ctx->Pixel.MapStoSsize;
+      case GL_PIXEL_MAP_I_TO_R:
+         return ctx->Pixel.MapItoRsize;
+      case GL_PIXEL_MAP_I_TO_G:
+         return ctx->Pixel.MapItoGsize;
+      case GL_PIXEL_MAP_I_TO_B:
+         return ctx->Pixel.MapItoBsize;
+      case GL_PIXEL_MAP_I_TO_A:
+         return ctx->Pixel.MapItoAsize;
+      case GL_PIXEL_MAP_R_TO_R:
+         return ctx->Pixel.MapRtoRsize;
+      case GL_PIXEL_MAP_G_TO_G:
+         return ctx->Pixel.MapGtoGsize;
+      case GL_PIXEL_MAP_B_TO_B:
+         return ctx->Pixel.MapBtoBsize;
+      case GL_PIXEL_MAP_A_TO_A:
+         return ctx->Pixel.MapAtoAsize;
+      default:
+         return 0;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapfv( GLenum map, GLfloat *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint mapsize, i;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   mapsize = get_map_size(ctx, map);
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* pack pixelmap into PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Pack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Pack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_FLOAT, values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapfv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapfv(PBO is mapped)");
+         return;
+      }
+      values = (GLfloat *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+   switch (map) {
+      case GL_PIXEL_MAP_I_TO_I:
+         MEMCPY(values, ctx->Pixel.MapItoI, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_S_TO_S:
+         for (i = 0; i < mapsize; i++) {
+	    values[i] = (GLfloat) ctx->Pixel.MapStoS[i];
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_R:
+         MEMCPY(values, ctx->Pixel.MapItoR, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_I_TO_G:
+         MEMCPY(values, ctx->Pixel.MapItoG, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_I_TO_B:
+         MEMCPY(values, ctx->Pixel.MapItoB, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_I_TO_A:
+         MEMCPY(values, ctx->Pixel.MapItoA, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_R_TO_R:
+         MEMCPY(values, ctx->Pixel.MapRtoR, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_G_TO_G:
+         MEMCPY(values, ctx->Pixel.MapGtoG, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_B_TO_B:
+         MEMCPY(values, ctx->Pixel.MapBtoB, mapsize * sizeof(GLfloat));
+	 break;
+      case GL_PIXEL_MAP_A_TO_A:
+         MEMCPY(values, ctx->Pixel.MapAtoA, mapsize * sizeof(GLfloat));
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapuiv( GLenum map, GLuint *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint mapsize, i;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   mapsize = get_map_size(ctx, map);
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* pack pixelmap into PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Pack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Pack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_UNSIGNED_INT, values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapuiv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapuiv(PBO is mapped)");
+         return;
+      }
+      values = (GLuint *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+   switch (map) {
+      case GL_PIXEL_MAP_I_TO_I:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoI[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_S_TO_S:
+         MEMCPY(values, ctx->Pixel.MapStoS, mapsize * sizeof(GLint));
+	 break;
+      case GL_PIXEL_MAP_I_TO_R:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoR[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_G:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoG[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_B:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoB[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_A:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoA[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_R_TO_R:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapRtoR[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_G_TO_G:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapGtoG[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_B_TO_B:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapBtoB[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_A_TO_A:
+	 for (i = 0; i < mapsize; i++) {
+	    values[i] = FLOAT_TO_UINT( ctx->Pixel.MapAtoA[i] );
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapusv( GLenum map, GLushort *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint mapsize, i;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   mapsize = get_map_size(ctx, map);
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* pack pixelmap into PBO */
+      GLubyte *buf;
+      /* Note, need to use DefaultPacking and Pack's buffer object */
+      ctx->DefaultPacking.BufferObj = ctx->Pack.BufferObj;
+      if (!_mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                     GL_INTENSITY, GL_UNSIGNED_SHORT,
+                                     values)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapusv(invalid PBO access)");
+         return;
+      }
+      /* restore */
+      ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapusv(PBO is mapped)");
+         return;
+      }
+      values = (GLushort *) ADD_POINTERS(buf, values);
+   }
+   else if (!values) {
+      return;
+   }
+
+   switch (map) {
+      case GL_PIXEL_MAP_I_TO_I:
+	 for (i = 0; i < mapsize; i++) {
+            values[i] = (GLushort) CLAMP(ctx->Pixel.MapItoI[i], 0.0, 65535.0);
+	 }
+	 break;
+      case GL_PIXEL_MAP_S_TO_S:
+	 for (i = 0; i < mapsize; i++) {
+            values[i] = (GLushort) CLAMP(ctx->Pixel.MapStoS[i], 0.0, 65535.0);
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_R:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapItoR[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_G:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapItoG[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_B:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapItoB[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_I_TO_A:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapItoA[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_R_TO_R:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapRtoR[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_G_TO_G:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapGtoG[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_B_TO_B:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapBtoB[i] );
+	 }
+	 break;
+      case GL_PIXEL_MAP_A_TO_A:
+	 for (i = 0; i < mapsize; i++) {
+	    CLAMPED_FLOAT_TO_USHORT(values[i] , ctx->Pixel.MapAtoA[i] );
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+
+/**********************************************************************/
+/*****                       glPixelTransfer                      *****/
+/**********************************************************************/
+
+
+/*
+ * Implements glPixelTransfer[fi] whether called immediately or from a
+ * display list.
+ */
+void GLAPIENTRY
+_mesa_PixelTransferf( GLenum pname, GLfloat param )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (pname) {
+      case GL_MAP_COLOR:
+         if (ctx->Pixel.MapColorFlag == (param ? GL_TRUE : GL_FALSE))
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
+	 break;
+      case GL_MAP_STENCIL:
+         if (ctx->Pixel.MapStencilFlag == (param ? GL_TRUE : GL_FALSE))
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
+	 break;
+      case GL_INDEX_SHIFT:
+         if (ctx->Pixel.IndexShift == (GLint) param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.IndexShift = (GLint) param;
+	 break;
+      case GL_INDEX_OFFSET:
+         if (ctx->Pixel.IndexOffset == (GLint) param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.IndexOffset = (GLint) param;
+	 break;
+      case GL_RED_SCALE:
+         if (ctx->Pixel.RedScale == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.RedScale = param;
+	 break;
+      case GL_RED_BIAS:
+         if (ctx->Pixel.RedBias == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.RedBias = param;
+	 break;
+      case GL_GREEN_SCALE:
+         if (ctx->Pixel.GreenScale == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.GreenScale = param;
+	 break;
+      case GL_GREEN_BIAS:
+         if (ctx->Pixel.GreenBias == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.GreenBias = param;
+	 break;
+      case GL_BLUE_SCALE:
+         if (ctx->Pixel.BlueScale == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.BlueScale = param;
+	 break;
+      case GL_BLUE_BIAS:
+         if (ctx->Pixel.BlueBias == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.BlueBias = param;
+	 break;
+      case GL_ALPHA_SCALE:
+         if (ctx->Pixel.AlphaScale == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.AlphaScale = param;
+	 break;
+      case GL_ALPHA_BIAS:
+         if (ctx->Pixel.AlphaBias == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.AlphaBias = param;
+	 break;
+      case GL_DEPTH_SCALE:
+         if (ctx->Pixel.DepthScale == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.DepthScale = param;
+	 break;
+      case GL_DEPTH_BIAS:
+         if (ctx->Pixel.DepthBias == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.DepthBias = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE:
+         if (ctx->Pixel.PostColorMatrixScale[0] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixScale[0] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS:
+         if (ctx->Pixel.PostColorMatrixBias[0] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixBias[0] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE:
+         if (ctx->Pixel.PostColorMatrixScale[1] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixScale[1] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS:
+         if (ctx->Pixel.PostColorMatrixBias[1] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixBias[1] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE:
+         if (ctx->Pixel.PostColorMatrixScale[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixScale[2] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS:
+         if (ctx->Pixel.PostColorMatrixBias[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixBias[2] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE:
+         if (ctx->Pixel.PostColorMatrixScale[3] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixScale[3] = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS:
+         if (ctx->Pixel.PostColorMatrixBias[3] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostColorMatrixBias[3] = param;
+	 break;
+      case GL_POST_CONVOLUTION_RED_SCALE:
+         if (ctx->Pixel.PostConvolutionScale[0] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionScale[0] = param;
+	 break;
+      case GL_POST_CONVOLUTION_RED_BIAS:
+         if (ctx->Pixel.PostConvolutionBias[0] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionBias[0] = param;
+	 break;
+      case GL_POST_CONVOLUTION_GREEN_SCALE:
+         if (ctx->Pixel.PostConvolutionScale[1] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionScale[1] = param;
+	 break;
+      case GL_POST_CONVOLUTION_GREEN_BIAS:
+         if (ctx->Pixel.PostConvolutionBias[1] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionBias[1] = param;
+	 break;
+      case GL_POST_CONVOLUTION_BLUE_SCALE:
+         if (ctx->Pixel.PostConvolutionScale[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionScale[2] = param;
+	 break;
+      case GL_POST_CONVOLUTION_BLUE_BIAS:
+         if (ctx->Pixel.PostConvolutionBias[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionBias[2] = param;
+	 break;
+      case GL_POST_CONVOLUTION_ALPHA_SCALE:
+         if (ctx->Pixel.PostConvolutionScale[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionScale[2] = param;
+	 break;
+      case GL_POST_CONVOLUTION_ALPHA_BIAS:
+         if (ctx->Pixel.PostConvolutionBias[2] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionBias[2] = param;
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
+         return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_PixelTransferi( GLenum pname, GLint param )
+{
+   _mesa_PixelTransferf( pname, (GLfloat) param );
+}
+
+
+
+/**********************************************************************/
+/*****                  Pixel processing functions               ******/
+/**********************************************************************/
+
+/*
+ * Apply scale and bias factors to an array of RGBA pixels.
+ */
+void
+_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],
+                          GLfloat rScale, GLfloat gScale,
+                          GLfloat bScale, GLfloat aScale,
+                          GLfloat rBias, GLfloat gBias,
+                          GLfloat bBias, GLfloat aBias)
+{
+   if (rScale != 1.0 || rBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;
+      }
+   }
+   if (gScale != 1.0 || gBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;
+      }
+   }
+   if (bScale != 1.0 || bBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;
+      }
+   }
+   if (aScale != 1.0 || aBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;
+      }
+   }
+}
+
+
+/*
+ * Apply pixel mapping to an array of floating point RGBA pixels.
+ */
+void
+_mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
+{
+   const GLfloat rscale = (GLfloat) (ctx->Pixel.MapRtoRsize - 1);
+   const GLfloat gscale = (GLfloat) (ctx->Pixel.MapGtoGsize - 1);
+   const GLfloat bscale = (GLfloat) (ctx->Pixel.MapBtoBsize - 1);
+   const GLfloat ascale = (GLfloat) (ctx->Pixel.MapAtoAsize - 1);
+   const GLfloat *rMap = ctx->Pixel.MapRtoR;
+   const GLfloat *gMap = ctx->Pixel.MapGtoG;
+   const GLfloat *bMap = ctx->Pixel.MapBtoB;
+   const GLfloat *aMap = ctx->Pixel.MapAtoA;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+      GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+      GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+      GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+      rgba[i][RCOMP] = rMap[IROUND(r * rscale)];
+      rgba[i][GCOMP] = gMap[IROUND(g * gscale)];
+      rgba[i][BCOMP] = bMap[IROUND(b * bscale)];
+      rgba[i][ACOMP] = aMap[IROUND(a * ascale)];
+   }
+}
+
+
+/*
+ * Apply the color matrix and post color matrix scaling and biasing.
+ */
+void
+_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
+{
+   const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0];
+   const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0];
+   const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1];
+   const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1];
+   const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2];
+   const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2];
+   const GLfloat as = ctx->Pixel.PostColorMatrixScale[3];
+   const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3];
+   const GLfloat *m = ctx->ColorMatrixStack.Top->m;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      const GLfloat r = rgba[i][RCOMP];
+      const GLfloat g = rgba[i][GCOMP];
+      const GLfloat b = rgba[i][BCOMP];
+      const GLfloat a = rgba[i][ACOMP];
+      rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
+      rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
+      rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
+      rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
+   }
+}
+
+
+/**
+ * Apply a color table lookup to an array of floating point RGBA colors.
+ */
+void
+_mesa_lookup_rgba_float(const struct gl_color_table *table,
+                        GLuint n, GLfloat rgba[][4])
+{
+   if (!table->Table || table->Size == 0)
+      return;
+
+   switch (table->Format) {
+      case GL_INTENSITY:
+         /* replace RGBA with I */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][RCOMP] * scale);
+               GLfloat c = lut[CLAMP(j, 0, max)];
+               rgba[i][RCOMP] = rgba[i][GCOMP] =
+                  rgba[i][BCOMP] = rgba[i][ACOMP] = c;
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][RCOMP] * scale);
+               GLfloat c = CHAN_TO_FLOAT(lut[CLAMP(j, 0, max)]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] =
+                  rgba[i][BCOMP] = rgba[i][ACOMP] = c;
+            }
+         }
+         break;
+      case GL_LUMINANCE:
+         /* replace RGB with L */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][RCOMP] * scale);
+               GLfloat c = lut[CLAMP(j, 0, max)];
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][RCOMP] * scale);
+               GLfloat c = CHAN_TO_FLOAT(lut[CLAMP(j, 0, max)]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
+            }
+         }
+         break;
+      case GL_ALPHA:
+         /* replace A with A */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][ACOMP] * scale);
+               rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND(rgba[i][ACOMP] * scale);
+               rgba[i][ACOMP] = CHAN_TO_FLOAT(lut[CLAMP(j, 0, max)]);
+            }
+         }
+         break;
+      case GL_LUMINANCE_ALPHA:
+         /* replace RGBA with LLLA */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jL = IROUND(rgba[i][RCOMP] * scale);
+               GLint jA = IROUND(rgba[i][ACOMP] * scale);
+               GLfloat luminance, alpha;
+               jL = CLAMP(jL, 0, max);
+               jA = CLAMP(jA, 0, max);
+               luminance = lut[jL * 2 + 0];
+               alpha     = lut[jA * 2 + 1];
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance;
+               rgba[i][ACOMP] = alpha;;
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jL = IROUND(rgba[i][RCOMP] * scale);
+               GLint jA = IROUND(rgba[i][ACOMP] * scale);
+               GLfloat luminance, alpha;
+               jL = CLAMP(jL, 0, max);
+               jA = CLAMP(jA, 0, max);
+               luminance = CHAN_TO_FLOAT(lut[jL * 2 + 0]);
+               alpha     = CHAN_TO_FLOAT(lut[jA * 2 + 1]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance;
+               rgba[i][ACOMP] = alpha;;
+            }
+         }
+         break;
+      case GL_RGB:
+         /* replace RGB with RGB */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND(rgba[i][RCOMP] * scale);
+               GLint jG = IROUND(rgba[i][GCOMP] * scale);
+               GLint jB = IROUND(rgba[i][BCOMP] * scale);
+               jR = CLAMP(jR, 0, max);
+               jG = CLAMP(jG, 0, max);
+               jB = CLAMP(jB, 0, max);
+               rgba[i][RCOMP] = lut[jR * 3 + 0];
+               rgba[i][GCOMP] = lut[jG * 3 + 1];
+               rgba[i][BCOMP] = lut[jB * 3 + 2];
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND(rgba[i][RCOMP] * scale);
+               GLint jG = IROUND(rgba[i][GCOMP] * scale);
+               GLint jB = IROUND(rgba[i][BCOMP] * scale);
+               jR = CLAMP(jR, 0, max);
+               jG = CLAMP(jG, 0, max);
+               jB = CLAMP(jB, 0, max);
+               rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 3 + 0]);
+               rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 3 + 1]);
+               rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 3 + 2]);
+            }
+         }
+         break;
+      case GL_RGBA:
+         /* replace RGBA with RGBA */
+         if (table->Type == GL_FLOAT) {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND(rgba[i][RCOMP] * scale);
+               GLint jG = IROUND(rgba[i][GCOMP] * scale);
+               GLint jB = IROUND(rgba[i][BCOMP] * scale);
+               GLint jA = IROUND(rgba[i][ACOMP] * scale);
+               jR = CLAMP(jR, 0, max);
+               jG = CLAMP(jG, 0, max);
+               jB = CLAMP(jB, 0, max);
+               jA = CLAMP(jA, 0, max);
+               rgba[i][RCOMP] = lut[jR * 4 + 0];
+               rgba[i][GCOMP] = lut[jG * 4 + 1];
+               rgba[i][BCOMP] = lut[jB * 4 + 2];
+               rgba[i][ACOMP] = lut[jA * 4 + 3];
+            }
+         }
+         else {
+            const GLint max = table->Size - 1;
+            const GLfloat scale = (GLfloat) max;
+            const GLchan *lut = (const GLchan *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND(rgba[i][RCOMP] * scale);
+               GLint jG = IROUND(rgba[i][GCOMP] * scale);
+               GLint jB = IROUND(rgba[i][BCOMP] * scale);
+               GLint jA = IROUND(rgba[i][ACOMP] * scale);
+               jR = CLAMP(jR, 0, max);
+               jG = CLAMP(jG, 0, max);
+               jB = CLAMP(jB, 0, max);
+               jA = CLAMP(jA, 0, max);
+               rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 4 + 0]);
+               rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 4 + 1]);
+               rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 4 + 2]);
+               rgba[i][ACOMP] = CHAN_TO_FLOAT(lut[jA * 4 + 3]);
+            }
+         }
+         break;
+      default:
+         _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
+         return;
+   }
+}
+
+
+
+/**
+ * Apply a color table lookup to an array of GLchan RGBA colors.
+ */
+void
+_mesa_lookup_rgba_chan(const struct gl_color_table *table,
+                       GLuint n, GLchan rgba[][4])
+{
+   if (!table->Table || table->Size == 0)
+      return;
+
+   switch (table->Format) {
+      case GL_INTENSITY:
+         /* replace RGBA with I */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+               GLchan c;
+               CLAMPED_FLOAT_TO_CHAN(c, lut[j]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] =
+                  rgba[i][BCOMP] = rgba[i][ACOMP] = c;
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  const GLchan c = lut[rgba[i][RCOMP]];
+                  rgba[i][RCOMP] = rgba[i][GCOMP] =
+                     rgba[i][BCOMP] = rgba[i][ACOMP] = c;
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+                  rgba[i][RCOMP] = rgba[i][GCOMP] =
+                     rgba[i][BCOMP] = rgba[i][ACOMP] = lut[j];
+               }
+            }
+         }
+         break;
+      case GL_LUMINANCE:
+         /* replace RGB with L */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+               GLchan c;
+               CLAMPED_FLOAT_TO_CHAN(c, lut[j]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  const GLchan c = lut[rgba[i][RCOMP]];
+                  rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+                  rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = lut[j];
+               }
+            }
+         }
+         break;
+      case GL_ALPHA:
+         /* replace A with A */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+               GLchan c;
+               CLAMPED_FLOAT_TO_CHAN(c, lut[j]);
+               rgba[i][ACOMP] = c;
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+                  rgba[i][ACOMP] = lut[j];
+               }
+            }
+         }
+         break;
+      case GL_LUMINANCE_ALPHA:
+         /* replace RGBA with LLLA */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+               GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+               GLchan luminance, alpha;
+               CLAMPED_FLOAT_TO_CHAN(luminance, lut[jL * 2 + 0]);
+               CLAMPED_FLOAT_TO_CHAN(alpha, lut[jA * 2 + 1]);
+               rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance;
+               rgba[i][ACOMP] = alpha;;
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLchan l = lut[rgba[i][RCOMP] * 2 + 0];
+                  GLchan a = lut[rgba[i][ACOMP] * 2 + 1];;
+                  rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = l;
+                  rgba[i][ACOMP] = a;
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+                  GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+                  GLchan luminance = lut[jL * 2 + 0];
+                  GLchan alpha     = lut[jA * 2 + 1];
+                  rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance;
+                  rgba[i][ACOMP] = alpha;
+               }
+            }
+         }
+         break;
+      case GL_RGB:
+         /* replace RGB with RGB */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+               GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
+               GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 3 + 0]);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 3 + 1]);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 3 + 2]);
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];
+                  rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];
+                  rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+                  GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
+                  GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
+                  rgba[i][RCOMP] = lut[jR * 3 + 0];
+                  rgba[i][GCOMP] = lut[jG * 3 + 1];
+                  rgba[i][BCOMP] = lut[jB * 3 + 2];
+               }
+            }
+         }
+         break;
+      case GL_RGBA:
+         /* replace RGBA with RGBA */
+         if (table->Type == GL_FLOAT) {
+            const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+            const GLfloat *lut = (const GLfloat *) table->Table;
+            GLuint i;
+            for (i = 0; i < n; i++) {
+               GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+               GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
+               GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
+               GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
+               CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
+            }
+         }
+         else {
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+            if (table->Size == 256) {
+               /* common case */
+               const GLchan *lut = (const GLchan *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];
+                  rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];
+                  rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];
+                  rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];
+               }
+            }
+            else
+#endif
+            {
+               const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF;
+               const GLfloat *lut = (const GLfloat *) table->Table;
+               GLuint i;
+               for (i = 0; i < n; i++) {
+                  GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
+                  GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
+                  GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
+                  GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
+                  CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
+                  CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
+                  CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
+                  CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
+               }
+            }
+         }
+         break;
+      default:
+         _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");
+         return;
+   }
+}
+
+
+
+/*
+ * Apply color index shift and offset to an array of pixels.
+ */
+void
+_mesa_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
+{
+   GLint shift = ctx->Pixel.IndexShift;
+   GLint offset = ctx->Pixel.IndexOffset;
+   GLuint i;
+   if (shift > 0) {
+      for (i=0;i<n;i++) {
+         indexes[i] = (indexes[i] << shift) + offset;
+      }
+   }
+   else if (shift < 0) {
+      shift = -shift;
+      for (i=0;i<n;i++) {
+         indexes[i] = (indexes[i] >> shift) + offset;
+      }
+   }
+   else {
+      for (i=0;i<n;i++) {
+         indexes[i] = indexes[i] + offset;
+      }
+   }
+}
+
+
+/*
+ * Apply color index mapping to color indexes.
+ */
+void
+_mesa_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
+{
+   const GLuint mask = ctx->Pixel.MapItoIsize - 1;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      const GLuint j = index[i] & mask;
+      index[i] = IROUND(ctx->Pixel.MapItoI[j]);
+   }
+}
+
+
+/*
+ * Map color indexes to rgba values.
+ */
+void
+_mesa_map_ci_to_rgba_chan( const GLcontext *ctx, GLuint n,
+                           const GLuint index[], GLchan rgba[][4] )
+{
+#if CHAN_BITS == 8
+   GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+   GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+   GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+   GLuint amask = ctx->Pixel.MapItoAsize - 1;
+   const GLubyte *rMap = ctx->Pixel.MapItoR8;
+   const GLubyte *gMap = ctx->Pixel.MapItoG8;
+   const GLubyte *bMap = ctx->Pixel.MapItoB8;
+   const GLubyte *aMap = ctx->Pixel.MapItoA8;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      rgba[i][RCOMP] = rMap[index[i] & rmask];
+      rgba[i][GCOMP] = gMap[index[i] & gmask];
+      rgba[i][BCOMP] = bMap[index[i] & bmask];
+      rgba[i][ACOMP] = aMap[index[i] & amask];
+   }
+#else
+   GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+   GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+   GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+   GLuint amask = ctx->Pixel.MapItoAsize - 1;
+   const GLfloat *rMap = ctx->Pixel.MapItoR;
+   const GLfloat *gMap = ctx->Pixel.MapItoG;
+   const GLfloat *bMap = ctx->Pixel.MapItoB;
+   const GLfloat *aMap = ctx->Pixel.MapItoA;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], rMap[index[i] & rmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], gMap[index[i] & gmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], bMap[index[i] & bmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], aMap[index[i] & amask]);
+   }
+#endif
+}
+
+
+/*
+ * Map color indexes to float rgba values.
+ */
+void
+_mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n,
+                      const GLuint index[], GLfloat rgba[][4] )
+{
+   GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+   GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+   GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+   GLuint amask = ctx->Pixel.MapItoAsize - 1;
+   const GLfloat *rMap = ctx->Pixel.MapItoR;
+   const GLfloat *gMap = ctx->Pixel.MapItoG;
+   const GLfloat *bMap = ctx->Pixel.MapItoB;
+   const GLfloat *aMap = ctx->Pixel.MapItoA;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      rgba[i][RCOMP] = rMap[index[i] & rmask];
+      rgba[i][GCOMP] = gMap[index[i] & gmask];
+      rgba[i][BCOMP] = bMap[index[i] & bmask];
+      rgba[i][ACOMP] = aMap[index[i] & amask];
+   }
+}
+
+
+/*
+ * Map 8-bit color indexes to rgb values.
+ */
+void
+_mesa_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
+                       GLchan rgba[][4] )
+{
+#if CHAN_BITS == 8
+   GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+   GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+   GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+   GLuint amask = ctx->Pixel.MapItoAsize - 1;
+   const GLubyte *rMap = ctx->Pixel.MapItoR8;
+   const GLubyte *gMap = ctx->Pixel.MapItoG8;
+   const GLubyte *bMap = ctx->Pixel.MapItoB8;
+   const GLubyte *aMap = ctx->Pixel.MapItoA8;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      rgba[i][RCOMP] = rMap[index[i] & rmask];
+      rgba[i][GCOMP] = gMap[index[i] & gmask];
+      rgba[i][BCOMP] = bMap[index[i] & bmask];
+      rgba[i][ACOMP] = aMap[index[i] & amask];
+   }
+#else
+   GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+   GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+   GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+   GLuint amask = ctx->Pixel.MapItoAsize - 1;
+   const GLfloat *rMap = ctx->Pixel.MapItoR;
+   const GLfloat *gMap = ctx->Pixel.MapItoG;
+   const GLfloat *bMap = ctx->Pixel.MapItoB;
+   const GLfloat *aMap = ctx->Pixel.MapItoA;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], rMap[index[i] & rmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], gMap[index[i] & gmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], bMap[index[i] & bmask]);
+      CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], aMap[index[i] & amask]);
+   }
+#endif
+}
+
+
+void
+_mesa_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
+                                GLstencil stencil[] )
+{
+   GLuint i;
+   GLint shift = ctx->Pixel.IndexShift;
+   GLint offset = ctx->Pixel.IndexOffset;
+   if (shift > 0) {
+      for (i=0;i<n;i++) {
+         stencil[i] = (stencil[i] << shift) + offset;
+      }
+   }
+   else if (shift < 0) {
+      shift = -shift;
+      for (i=0;i<n;i++) {
+         stencil[i] = (stencil[i] >> shift) + offset;
+      }
+   }
+   else {
+      for (i=0;i<n;i++) {
+         stencil[i] = stencil[i] + offset;
+      }
+   }
+
+}
+
+
+void
+_mesa_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
+{
+   GLuint mask = ctx->Pixel.MapStoSsize - 1;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ];
+   }
+}
+
+
+
+/*
+ * This function converts an array of GLchan colors to GLfloat colors.
+ * Most importantly, it undoes the non-uniform quantization of pixel
+ * values introduced when we convert shallow (< 8 bit) pixel values
+ * to GLubytes in the ctx->Driver.ReadRGBASpan() functions.
+ * This fixes a number of OpenGL conformance failures when running on
+ * 16bpp displays, for example.
+ */
+void
+_mesa_chan_to_float_span(const GLcontext *ctx, GLuint n,
+                         CONST GLchan rgba[][4], GLfloat rgbaf[][4])
+{
+#if CHAN_TYPE == GL_FLOAT
+   MEMCPY(rgbaf, rgba, n * 4 * sizeof(GLfloat));
+#else
+   const GLuint rShift = CHAN_BITS - ctx->Visual.redBits;
+   const GLuint gShift = CHAN_BITS - ctx->Visual.greenBits;
+   const GLuint bShift = CHAN_BITS - ctx->Visual.blueBits;
+   GLuint aShift;
+   const GLfloat rScale = 1.0F / (GLfloat) ((1 << ctx->Visual.redBits  ) - 1);
+   const GLfloat gScale = 1.0F / (GLfloat) ((1 << ctx->Visual.greenBits) - 1);
+   const GLfloat bScale = 1.0F / (GLfloat) ((1 << ctx->Visual.blueBits ) - 1);
+   GLfloat aScale;
+   GLuint i;
+
+   if (ctx->Visual.alphaBits > 0) {
+      aShift = CHAN_BITS - ctx->Visual.alphaBits;
+      aScale = 1.0F / (GLfloat) ((1 << ctx->Visual.alphaBits) - 1);
+   }
+   else {
+      aShift = 0;
+      aScale = 1.0F / CHAN_MAXF;
+   }
+
+   for (i = 0; i < n; i++) {
+      const GLint r = rgba[i][RCOMP] >> rShift;
+      const GLint g = rgba[i][GCOMP] >> gShift;
+      const GLint b = rgba[i][BCOMP] >> bShift;
+      const GLint a = rgba[i][ACOMP] >> aShift;
+      rgbaf[i][RCOMP] = (GLfloat) r * rScale;
+      rgbaf[i][GCOMP] = (GLfloat) g * gScale;
+      rgbaf[i][BCOMP] = (GLfloat) b * bScale;
+      rgbaf[i][ACOMP] = (GLfloat) a * aScale;
+   }
+#endif
+}
+
+/**********************************************************************/
+/*****                    State Management                        *****/
+/**********************************************************************/
+
+/*
+ * Return a bitmask of IMAGE_*_BIT flags which to indicate which
+ * pixel transfer operations are enabled.
+ */
+static void
+update_image_transfer_state(GLcontext *ctx)
+{
+   GLuint mask = 0;
+
+   if (ctx->Pixel.RedScale   != 1.0F || ctx->Pixel.RedBias   != 0.0F ||
+       ctx->Pixel.GreenScale != 1.0F || ctx->Pixel.GreenBias != 0.0F ||
+       ctx->Pixel.BlueScale  != 1.0F || ctx->Pixel.BlueBias  != 0.0F ||
+       ctx->Pixel.AlphaScale != 1.0F || ctx->Pixel.AlphaBias != 0.0F)
+      mask |= IMAGE_SCALE_BIAS_BIT;
+
+   if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset)
+      mask |= IMAGE_SHIFT_OFFSET_BIT;
+
+   if (ctx->Pixel.MapColorFlag)
+      mask |= IMAGE_MAP_COLOR_BIT;
+
+   if (ctx->Pixel.ColorTableEnabled)
+      mask |= IMAGE_COLOR_TABLE_BIT;
+
+   if (ctx->Pixel.Convolution1DEnabled ||
+       ctx->Pixel.Convolution2DEnabled ||
+       ctx->Pixel.Separable2DEnabled) {
+      mask |= IMAGE_CONVOLUTION_BIT;
+      if (ctx->Pixel.PostConvolutionScale[0] != 1.0F ||
+          ctx->Pixel.PostConvolutionScale[1] != 1.0F ||
+          ctx->Pixel.PostConvolutionScale[2] != 1.0F ||
+          ctx->Pixel.PostConvolutionScale[3] != 1.0F ||
+          ctx->Pixel.PostConvolutionBias[0] != 0.0F ||
+          ctx->Pixel.PostConvolutionBias[1] != 0.0F ||
+          ctx->Pixel.PostConvolutionBias[2] != 0.0F ||
+          ctx->Pixel.PostConvolutionBias[3] != 0.0F) {
+         mask |= IMAGE_POST_CONVOLUTION_SCALE_BIAS;
+      }
+   }
+
+   if (ctx->Pixel.PostConvolutionColorTableEnabled)
+      mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT;
+
+   if (ctx->ColorMatrixStack.Top->type != MATRIX_IDENTITY ||
+       ctx->Pixel.PostColorMatrixScale[0] != 1.0F ||
+       ctx->Pixel.PostColorMatrixBias[0]  != 0.0F ||
+       ctx->Pixel.PostColorMatrixScale[1] != 1.0F ||
+       ctx->Pixel.PostColorMatrixBias[1]  != 0.0F ||
+       ctx->Pixel.PostColorMatrixScale[2] != 1.0F ||
+       ctx->Pixel.PostColorMatrixBias[2]  != 0.0F ||
+       ctx->Pixel.PostColorMatrixScale[3] != 1.0F ||
+       ctx->Pixel.PostColorMatrixBias[3]  != 0.0F)
+      mask |= IMAGE_COLOR_MATRIX_BIT;
+
+   if (ctx->Pixel.PostColorMatrixColorTableEnabled)
+      mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT;
+
+   if (ctx->Pixel.HistogramEnabled)
+      mask |= IMAGE_HISTOGRAM_BIT;
+
+   if (ctx->Pixel.MinMaxEnabled)
+      mask |= IMAGE_MIN_MAX_BIT;
+
+   ctx->_ImageTransferState = mask;
+}
+
+
+void _mesa_update_pixel( GLcontext *ctx, GLuint new_state )
+{
+   if (new_state & _NEW_COLOR_MATRIX)
+      _math_matrix_analyse( ctx->ColorMatrixStack.Top );
+
+   /* References ColorMatrix.type (derived above).
+    */
+   if (new_state & _IMAGE_NEW_TRANSFER_STATE)
+      update_image_transfer_state(ctx);
+}
+
+
+/**********************************************************************/
+/*****                      Initialization                        *****/
+/**********************************************************************/
+
+
+/**
+ * Initialize the context's PIXEL attribute group.
+ */
+void
+_mesa_init_pixel( GLcontext *ctx )
+{
+   int i;
+
+   /* Pixel group */
+   ctx->Pixel.RedBias = 0.0;
+   ctx->Pixel.RedScale = 1.0;
+   ctx->Pixel.GreenBias = 0.0;
+   ctx->Pixel.GreenScale = 1.0;
+   ctx->Pixel.BlueBias = 0.0;
+   ctx->Pixel.BlueScale = 1.0;
+   ctx->Pixel.AlphaBias = 0.0;
+   ctx->Pixel.AlphaScale = 1.0;
+   ctx->Pixel.DepthBias = 0.0;
+   ctx->Pixel.DepthScale = 1.0;
+   ctx->Pixel.IndexOffset = 0;
+   ctx->Pixel.IndexShift = 0;
+   ctx->Pixel.ZoomX = 1.0;
+   ctx->Pixel.ZoomY = 1.0;
+   ctx->Pixel.MapColorFlag = GL_FALSE;
+   ctx->Pixel.MapStencilFlag = GL_FALSE;
+   ctx->Pixel.MapStoSsize = 1;
+   ctx->Pixel.MapItoIsize = 1;
+   ctx->Pixel.MapItoRsize = 1;
+   ctx->Pixel.MapItoGsize = 1;
+   ctx->Pixel.MapItoBsize = 1;
+   ctx->Pixel.MapItoAsize = 1;
+   ctx->Pixel.MapRtoRsize = 1;
+   ctx->Pixel.MapGtoGsize = 1;
+   ctx->Pixel.MapBtoBsize = 1;
+   ctx->Pixel.MapAtoAsize = 1;
+   ctx->Pixel.MapStoS[0] = 0;
+   ctx->Pixel.MapItoI[0] = 0.0;
+   ctx->Pixel.MapItoR[0] = 0.0;
+   ctx->Pixel.MapItoG[0] = 0.0;
+   ctx->Pixel.MapItoB[0] = 0.0;
+   ctx->Pixel.MapItoA[0] = 0.0;
+   ctx->Pixel.MapItoR8[0] = 0;
+   ctx->Pixel.MapItoG8[0] = 0;
+   ctx->Pixel.MapItoB8[0] = 0;
+   ctx->Pixel.MapItoA8[0] = 0;
+   ctx->Pixel.MapRtoR[0] = 0.0;
+   ctx->Pixel.MapGtoG[0] = 0.0;
+   ctx->Pixel.MapBtoB[0] = 0.0;
+   ctx->Pixel.MapAtoA[0] = 0.0;
+   ctx->Pixel.HistogramEnabled = GL_FALSE;
+   ctx->Pixel.MinMaxEnabled = GL_FALSE;
+   ctx->Pixel.PixelTextureEnabled = GL_FALSE;
+   ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
+   ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
+   ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
+   ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0);
+   ASSIGN_4V(ctx->Pixel.PCCTscale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.PCCTbias, 0.0, 0.0, 0.0, 0.0);
+   ASSIGN_4V(ctx->Pixel.PCMCTscale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.PCMCTbias, 0.0, 0.0, 0.0, 0.0);
+   ctx->Pixel.ColorTableEnabled = GL_FALSE;
+   ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE;
+   ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE;
+   ctx->Pixel.Convolution1DEnabled = GL_FALSE;
+   ctx->Pixel.Convolution2DEnabled = GL_FALSE;
+   ctx->Pixel.Separable2DEnabled = GL_FALSE;
+   for (i = 0; i < 3; i++) {
+      ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0);
+      ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE;
+      ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0);
+      ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0);
+   }
+   for (i = 0; i < MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_WIDTH * 4; i++) {
+      ctx->Convolution1D.Filter[i] = 0.0;
+      ctx->Convolution2D.Filter[i] = 0.0;
+      ctx->Separable2D.Filter[i] = 0.0;
+   }
+   ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0);
+   /* GL_SGI_texture_color_table */
+   ASSIGN_4V(ctx->Pixel.TextureColorTableScale, 1.0, 1.0, 1.0, 1.0);
+   ASSIGN_4V(ctx->Pixel.TextureColorTableBias, 0.0, 0.0, 0.0, 0.0);
+
+   /* Pixel transfer */
+   ctx->Pack.Alignment = 4;
+   ctx->Pack.RowLength = 0;
+   ctx->Pack.ImageHeight = 0;
+   ctx->Pack.SkipPixels = 0;
+   ctx->Pack.SkipRows = 0;
+   ctx->Pack.SkipImages = 0;
+   ctx->Pack.SwapBytes = GL_FALSE;
+   ctx->Pack.LsbFirst = GL_FALSE;
+   ctx->Pack.ClientStorage = GL_FALSE;
+   ctx->Pack.Invert = GL_FALSE;
+#if FEATURE_EXT_pixel_buffer_object
+   ctx->Pack.BufferObj = ctx->Array.NullBufferObj;
+#endif
+   ctx->Unpack.Alignment = 4;
+   ctx->Unpack.RowLength = 0;
+   ctx->Unpack.ImageHeight = 0;
+   ctx->Unpack.SkipPixels = 0;
+   ctx->Unpack.SkipRows = 0;
+   ctx->Unpack.SkipImages = 0;
+   ctx->Unpack.SwapBytes = GL_FALSE;
+   ctx->Unpack.LsbFirst = GL_FALSE;
+   ctx->Unpack.ClientStorage = GL_FALSE;
+   ctx->Unpack.Invert = GL_FALSE;
+#if FEATURE_EXT_pixel_buffer_object
+   ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
+#endif
+
+   /*
+    * _mesa_unpack_image() returns image data in this format.  When we
+    * execute image commands (glDrawPixels(), glTexImage(), etc) from
+    * within display lists we have to be sure to set the current
+    * unpacking parameters to these values!
+    */
+   ctx->DefaultPacking.Alignment = 1;
+   ctx->DefaultPacking.RowLength = 0;
+   ctx->DefaultPacking.SkipPixels = 0;
+   ctx->DefaultPacking.SkipRows = 0;
+   ctx->DefaultPacking.ImageHeight = 0;
+   ctx->DefaultPacking.SkipImages = 0;
+   ctx->DefaultPacking.SwapBytes = GL_FALSE;
+   ctx->DefaultPacking.LsbFirst = GL_FALSE;
+   ctx->DefaultPacking.ClientStorage = GL_FALSE;
+   ctx->DefaultPacking.Invert = GL_FALSE;
+#if FEATURE_EXT_pixel_buffer_object
+   ctx->DefaultPacking.BufferObj = ctx->Array.NullBufferObj;
+#endif
+
+   if (ctx->Visual.doubleBufferMode) {
+      ctx->Pixel.ReadBuffer = GL_BACK;
+   }
+   else {
+      ctx->Pixel.ReadBuffer = GL_FRONT;
+   }
+
+   /* Miscellaneous */
+   ctx->_ImageTransferState = 0;
+}