svn merge ^/branches/released . --username marha

1 files changed, 845 insertions, 0 deletions

diff --git a/mesalib/src/mesa/main/pixel.c b/mesalib/src/mesa/main/pixel.c
new file mode 100644
index 000000000..fcef6dfd4
--- /dev/null
+++ b/mesalib/src/mesa/main/pixel.c
@@ -0,0 +1,845 @@
+/*
+ * 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.
+ */
+
+
+/**
+ * \file pixel.c
+ * Pixel transfer functions (glPixelZoom, glPixelMap, glPixelTransfer)
+ */
+
+#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;
+}
+
+
+
+/**********************************************************************/
+/*****                         glPixelMap                         *****/
+/**********************************************************************/
+
+/**
+ * Return pointer to a pixelmap by name.
+ */
+static struct gl_pixelmap *
+get_pixelmap(GLcontext *ctx, GLenum map)
+{
+   switch (map) {
+   case GL_PIXEL_MAP_I_TO_I:
+      return &ctx->PixelMaps.ItoI;
+   case GL_PIXEL_MAP_S_TO_S:
+      return &ctx->PixelMaps.StoS;
+   case GL_PIXEL_MAP_I_TO_R:
+      return &ctx->PixelMaps.ItoR;
+   case GL_PIXEL_MAP_I_TO_G:
+      return &ctx->PixelMaps.ItoG;
+   case GL_PIXEL_MAP_I_TO_B:
+      return &ctx->PixelMaps.ItoB;
+   case GL_PIXEL_MAP_I_TO_A:
+      return &ctx->PixelMaps.ItoA;
+   case GL_PIXEL_MAP_R_TO_R:
+      return &ctx->PixelMaps.RtoR;
+   case GL_PIXEL_MAP_G_TO_G:
+      return &ctx->PixelMaps.GtoG;
+   case GL_PIXEL_MAP_B_TO_B:
+      return &ctx->PixelMaps.BtoB;
+   case GL_PIXEL_MAP_A_TO_A:
+      return &ctx->PixelMaps.AtoA;
+   default:
+      return NULL;
+   }
+}
+
+
+/**
+ * Helper routine used by the other _mesa_PixelMap() functions.
+ */
+static void
+store_pixelmap(GLcontext *ctx, GLenum map, GLsizei mapsize,
+               const GLfloat *values)
+{
+   GLint i;
+   struct gl_pixelmap *pm = get_pixelmap(ctx, map);
+   if (!pm) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glPixelMap(map)");
+      return;
+   }
+
+   switch (map) {
+   case GL_PIXEL_MAP_S_TO_S:
+      /* special case */
+      ctx->PixelMaps.StoS.Size = mapsize;
+      for (i = 0; i < mapsize; i++) {
+         ctx->PixelMaps.StoS.Map[i] = (GLfloat)IROUND(values[i]);
+      }
+      break;
+   case GL_PIXEL_MAP_I_TO_I:
+      /* special case */
+      ctx->PixelMaps.ItoI.Size = mapsize;
+      for (i = 0; i < mapsize; i++) {
+         ctx->PixelMaps.ItoI.Map[i] = values[i];
+      }
+      break;
+   default:
+      /* general case */
+      pm->Size = mapsize;
+      for (i = 0; i < mapsize; i++) {
+         GLfloat val = CLAMP(values[i], 0.0F, 1.0F);
+         pm->Map[i] = val;
+         pm->Map8[i] = (GLint) (val * 255.0F);
+      }
+   }
+}
+
+
+/**
+ * Convenience wrapper for _mesa_validate_pbo_access() for gl[Get]PixelMap().
+ */
+static GLboolean
+validate_pbo_access(GLcontext *ctx, struct gl_pixelstore_attrib *pack,
+                    GLsizei mapsize, GLenum format, GLenum type,
+                    const GLvoid *ptr)
+{
+   GLboolean ok;
+
+   /* Note, need to use DefaultPacking and Unpack's buffer object */
+   ctx->DefaultPacking.BufferObj = pack->BufferObj;
+
+   ok = _mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
+                                  format, type, ptr);
+
+   /* restore */
+   ctx->DefaultPacking.BufferObj = ctx->Shared->NullBufferObj;
+
+   if (!ok) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glPixelMap(invalid PBO access)");
+   }
+   return ok;
+}
+
+
+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_is_pow_two(mapsize)) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
+                            GL_INTENSITY, GL_FLOAT, values)) {
+      return;
+   }
+
+   values = (const GLfloat *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapfv(PBO is mapped)");
+      }
+      return;
+   }
+
+   store_pixelmap(ctx, map, mapsize, values);
+
+   _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
+}
+
+
+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_is_pow_two(mapsize)) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
+                            GL_INTENSITY, GL_UNSIGNED_INT, values)) {
+      return;
+   }
+
+   values = (const GLuint *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapuiv(PBO is mapped)");
+      }
+      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] );
+      }
+   }
+
+   _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
+
+   store_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_is_pow_two(mapsize)) {
+	 _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
+         return;
+      }
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+
+   if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
+                            GL_INTENSITY, GL_UNSIGNED_SHORT, values)) {
+      return;
+   }
+
+   values = (const GLushort *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glPixelMapusv(PBO is mapped)");
+      }
+      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] );
+      }
+   }
+
+   _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
+
+   store_pixelmap(ctx, map, mapsize, fvalues);
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapfv( GLenum map, GLfloat *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint mapsize, i;
+   const struct gl_pixelmap *pm;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   pm = get_pixelmap(ctx, map);
+   if (!pm) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapfv(map)");
+      return;
+   }
+
+   mapsize = pm->Size;
+
+   if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
+                            GL_INTENSITY, GL_FLOAT, values)) {
+      return;
+   }
+
+   values = (GLfloat *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapfv(PBO is mapped)");
+      }
+      return;
+   }
+
+   if (map == GL_PIXEL_MAP_S_TO_S) {
+      /* special case */
+      for (i = 0; i < mapsize; i++) {
+         values[i] = (GLfloat) ctx->PixelMaps.StoS.Map[i];
+      }
+   }
+   else {
+      MEMCPY(values, pm->Map, mapsize * sizeof(GLfloat));
+   }
+
+   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapuiv( GLenum map, GLuint *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint mapsize, i;
+   const struct gl_pixelmap *pm;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   pm = get_pixelmap(ctx, map);
+   if (!pm) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapuiv(map)");
+      return;
+   }
+   mapsize = pm->Size;
+
+   if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
+                            GL_INTENSITY, GL_UNSIGNED_INT, values)) {
+      return;
+   }
+
+   values = (GLuint *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapuiv(PBO is mapped)");
+      }
+      return;
+   }
+
+   if (map == GL_PIXEL_MAP_S_TO_S) {
+      /* special case */
+      MEMCPY(values, ctx->PixelMaps.StoS.Map, mapsize * sizeof(GLint));
+   }
+   else {
+      for (i = 0; i < mapsize; i++) {
+         values[i] = FLOAT_TO_UINT( pm->Map[i] );
+      }
+   }
+
+   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelMapusv( GLenum map, GLushort *values )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint mapsize, i;
+   const struct gl_pixelmap *pm;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   pm = get_pixelmap(ctx, map);
+   if (!pm) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapusv(map)");
+      return;
+   }
+   mapsize = pm ? pm->Size : 0;
+
+   if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
+                            GL_INTENSITY, GL_UNSIGNED_SHORT, values)) {
+      return;
+   }
+
+   values = (GLushort *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
+   if (!values) {
+      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetPixelMapusv(PBO is mapped)");
+      }
+      return;
+   }
+
+   switch (map) {
+   /* special cases */
+   case GL_PIXEL_MAP_I_TO_I:
+      for (i = 0; i < mapsize; i++) {
+         values[i] = (GLushort) CLAMP(ctx->PixelMaps.ItoI.Map[i], 0.0, 65535.);
+      }
+      break;
+   case GL_PIXEL_MAP_S_TO_S:
+      for (i = 0; i < mapsize; i++) {
+         values[i] = (GLushort) CLAMP(ctx->PixelMaps.StoS.Map[i], 0.0, 65535.);
+      }
+      break;
+   default:
+      for (i = 0; i < mapsize; i++) {
+         CLAMPED_FLOAT_TO_USHORT(values[i], pm->Map[i] );
+      }
+   }
+
+   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
+}
+
+
+
+/**********************************************************************/
+/*****                       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[3] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionScale[3] = param;
+	 break;
+      case GL_POST_CONVOLUTION_ALPHA_BIAS:
+         if (ctx->Pixel.PostConvolutionBias[3] == param)
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_PIXEL);
+         ctx->Pixel.PostConvolutionBias[3] = 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 );
+}
+
+
+
+/**********************************************************************/
+/*****                    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[COLORTABLE_PRECONVOLUTION])
+      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.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION])
+      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.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX])
+      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;
+}
+
+
+/**
+ * Update mesa pixel transfer derived state.
+ */
+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 & _MESA_NEW_TRANSFER_STATE)
+      update_image_transfer_state(ctx);
+}
+
+
+/**********************************************************************/
+/*****                      Initialization                        *****/
+/**********************************************************************/
+
+static void
+init_pixelmap(struct gl_pixelmap *map)
+{
+   map->Size = 1;
+   map->Map[0] = 0.0;
+   map->Map8[0] = 0;
+}
+
+
+/**
+ * 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;
+   init_pixelmap(&ctx->PixelMaps.StoS);
+   init_pixelmap(&ctx->PixelMaps.ItoI);
+   init_pixelmap(&ctx->PixelMaps.ItoR);
+   init_pixelmap(&ctx->PixelMaps.ItoG);
+   init_pixelmap(&ctx->PixelMaps.ItoB);
+   init_pixelmap(&ctx->PixelMaps.ItoA);
+   init_pixelmap(&ctx->PixelMaps.RtoR);
+   init_pixelmap(&ctx->PixelMaps.GtoG);
+   init_pixelmap(&ctx->PixelMaps.BtoB);
+   init_pixelmap(&ctx->PixelMaps.AtoA);
+   ctx->Pixel.HistogramEnabled = GL_FALSE;
+   ctx->Pixel.MinMaxEnabled = GL_FALSE;
+   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);
+   for (i = 0; i < COLORTABLE_MAX; i++) {
+      ASSIGN_4V(ctx->Pixel.ColorTableScale[i], 1.0, 1.0, 1.0, 1.0);
+      ASSIGN_4V(ctx->Pixel.ColorTableBias[i], 0.0, 0.0, 0.0, 0.0);
+      ctx->Pixel.ColorTableEnabled[i] = 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);
+
+   if (ctx->Visual.doubleBufferMode) {
+      ctx->Pixel.ReadBuffer = GL_BACK;
+   }
+   else {
+      ctx->Pixel.ReadBuffer = GL_FRONT;
+   }
+
+   /* Miscellaneous */
+   ctx->_ImageTransferState = 0;
+}