xserver and mesa git update 28-12-2010

1 files changed, 700 insertions, 870 deletions

diff --git a/mesalib/src/mesa/main/pixel.c b/mesalib/src/mesa/main/pixel.c
index 675e933ca..db1f05a58 100644
--- a/mesalib/src/mesa/main/pixel.c
+++ b/mesalib/src/mesa/main/pixel.c
@@ -1,870 +1,700 @@
-/*
- * 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 "macros.h"
-#include "pixel.h"
-#include "mtypes.h"
-#include "main/dispatch.h"
-
-
-#if FEATURE_pixel_transfer
-
-
-/**********************************************************************/
-/*****                    glPixelZoom                             *****/
-/**********************************************************************/
-
-static 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 */
-   _mesa_reference_buffer_object(ctx,
-                                 &ctx->DefaultPacking.BufferObj,
-                                 pack->BufferObj);
-
-   ok = _mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
-                                  format, type, ptr);
-
-   /* restore */
-   _mesa_reference_buffer_object(ctx,
-                                 &ctx->DefaultPacking.BufferObj,
-                                 ctx->Shared->NullBufferObj);
-
-   if (!ok) {
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "glPixelMap(invalid PBO access)");
-   }
-   return ok;
-}
-
-
-static 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);
-}
-
-
-static 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);
-}
-
-
-static 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);
-}
-
-
-static 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);
-}
-
-
-static 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);
-}
-
-
-static 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->Size;
-
-   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.
- */
-static 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;
-   }
-}
-
-
-static 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);
-}
-
-
-void
-_mesa_init_pixel_dispatch(struct _glapi_table *disp)
-{
-   SET_GetPixelMapfv(disp, _mesa_GetPixelMapfv);
-   SET_GetPixelMapuiv(disp, _mesa_GetPixelMapuiv);
-   SET_GetPixelMapusv(disp, _mesa_GetPixelMapusv);
-   SET_PixelMapfv(disp, _mesa_PixelMapfv);
-   SET_PixelMapuiv(disp, _mesa_PixelMapuiv);
-   SET_PixelMapusv(disp, _mesa_PixelMapusv);
-   SET_PixelTransferf(disp, _mesa_PixelTransferf);
-   SET_PixelTransferi(disp, _mesa_PixelTransferi);
-   SET_PixelZoom(disp, _mesa_PixelZoom);
-}
-
-
-#endif /* FEATURE_pixel_transfer */
-
-
-/**********************************************************************/
-/*****                      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;
-}
+/*

+ * 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 "macros.h"

+#include "pixel.h"

+#include "mtypes.h"

+#include "main/dispatch.h"

+

+

+#if FEATURE_pixel_transfer

+

+

+/**********************************************************************/

+/*****                    glPixelZoom                             *****/

+/**********************************************************************/

+

+static 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(struct gl_context *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(struct gl_context *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(struct gl_context *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 */

+   _mesa_reference_buffer_object(ctx,

+                                 &ctx->DefaultPacking.BufferObj,

+                                 pack->BufferObj);

+

+   ok = _mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,

+                                  format, type, ptr);

+

+   /* restore */

+   _mesa_reference_buffer_object(ctx,

+                                 &ctx->DefaultPacking.BufferObj,

+                                 ctx->Shared->NullBufferObj);

+

+   if (!ok) {

+      _mesa_error(ctx, GL_INVALID_OPERATION,

+                  "glPixelMap(invalid PBO access)");

+   }

+   return ok;

+}

+

+

+static 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);

+}

+

+

+static 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);

+}

+

+

+static 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);

+}

+

+

+static 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);

+}

+

+

+static 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);

+}

+

+

+static 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->Size;

+

+   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.

+ */

+static 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;

+      default:

+         _mesa_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );

+         return;

+   }

+}

+

+

+static 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(struct gl_context *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;

+

+   ctx->_ImageTransferState = mask;

+}

+

+

+/**

+ * Update mesa pixel transfer derived state.

+ */

+void _mesa_update_pixel( struct gl_context *ctx, GLuint new_state )

+{

+   if (new_state & _MESA_NEW_TRANSFER_STATE)

+      update_image_transfer_state(ctx);

+}

+

+

+void

+_mesa_init_pixel_dispatch(struct _glapi_table *disp)

+{

+   SET_GetPixelMapfv(disp, _mesa_GetPixelMapfv);

+   SET_GetPixelMapuiv(disp, _mesa_GetPixelMapuiv);

+   SET_GetPixelMapusv(disp, _mesa_GetPixelMapusv);

+   SET_PixelMapfv(disp, _mesa_PixelMapfv);

+   SET_PixelMapuiv(disp, _mesa_PixelMapuiv);

+   SET_PixelMapusv(disp, _mesa_PixelMapusv);

+   SET_PixelTransferf(disp, _mesa_PixelTransferf);

+   SET_PixelTransferi(disp, _mesa_PixelTransferi);

+   SET_PixelZoom(disp, _mesa_PixelZoom);

+}

+

+

+#endif /* FEATURE_pixel_transfer */

+

+

+/**********************************************************************/

+/*****                      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( struct gl_context *ctx )

+{

+   /* 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);

+   /* 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;

+}