xserver and mesa git update 28-12-2010

1 files changed, 1874 insertions, 6073 deletions

diff --git a/mesalib/src/mesa/main/image.c b/mesalib/src/mesa/main/image.c
index 86aa6d0d7..08d25c8d1 100644
--- a/mesalib/src/mesa/main/image.c
+++ b/mesalib/src/mesa/main/image.c
@@ -1,6073 +1,1874 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.5
- *
- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (C) 2009  VMware, Inc.  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 image.c
- * Image handling.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "enums.h"
-#include "image.h"
-#include "imports.h"
-#include "macros.h"
-
-
-/**
- * NOTE:
- * Normally, BYTE_TO_FLOAT(0) returns 0.00392  That causes problems when
- * we later convert the float to a packed integer value (such as for
- * GL_RGB5_A1) because we'll wind up with a non-zero value.
- *
- * We redefine the macros here so zero is handled correctly.
- */
-#undef BYTE_TO_FLOAT
-#define BYTE_TO_FLOAT(B)    ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
-
-#undef SHORT_TO_FLOAT
-#define SHORT_TO_FLOAT(S)   ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
-
-
-
-/** Compute ceiling of integer quotient of A divided by B. */
-#define CEILING( A, B )  ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
-/**
- * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
- */
-GLboolean
-_mesa_type_is_packed(GLenum type)
-{
-   switch (type) {
-   case GL_UNSIGNED_BYTE_3_3_2:
-   case GL_UNSIGNED_BYTE_2_3_3_REV:
-   case GL_UNSIGNED_SHORT_5_6_5:
-   case GL_UNSIGNED_SHORT_5_6_5_REV:
-   case GL_UNSIGNED_SHORT_4_4_4_4:
-   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-   case GL_UNSIGNED_SHORT_5_5_5_1:
-   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-   case GL_UNSIGNED_INT_8_8_8_8:
-   case GL_UNSIGNED_INT_8_8_8_8_REV:
-   case GL_UNSIGNED_INT_10_10_10_2:
-   case GL_UNSIGNED_INT_2_10_10_10_REV:
-   case GL_UNSIGNED_SHORT_8_8_MESA:
-   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
-   case GL_UNSIGNED_INT_24_8_EXT:
-      return GL_TRUE;
-   }
-
-   return GL_FALSE;
-}
-
-/**
- * Flip the 8 bits in each byte of the given array.
- *
- * \param p array.
- * \param n number of bytes.
- *
- * \todo try this trick to flip bytes someday:
- * \code
- *  v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
- *  v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
- *  v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
- * \endcode
- */
-static void
-flip_bytes( GLubyte *p, GLuint n )
-{
-   GLuint i, a, b;
-   for (i = 0; i < n; i++) {
-      b = (GLuint) p[i];        /* words are often faster than bytes */
-      a = ((b & 0x01) << 7) |
-	  ((b & 0x02) << 5) |
-	  ((b & 0x04) << 3) |
-	  ((b & 0x08) << 1) |
-	  ((b & 0x10) >> 1) |
-	  ((b & 0x20) >> 3) |
-	  ((b & 0x40) >> 5) |
-	  ((b & 0x80) >> 7);
-      p[i] = (GLubyte) a;
-   }
-}
-
-
-/**
- * Flip the order of the 2 bytes in each word in the given array.
- *
- * \param p array.
- * \param n number of words.
- */
-void
-_mesa_swap2( GLushort *p, GLuint n )
-{
-   GLuint i;
-   for (i = 0; i < n; i++) {
-      p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
-   }
-}
-
-
-
-/*
- * Flip the order of the 4 bytes in each word in the given array.
- */
-void
-_mesa_swap4( GLuint *p, GLuint n )
-{
-   GLuint i, a, b;
-   for (i = 0; i < n; i++) {
-      b = p[i];
-      a =  (b >> 24)
-	| ((b >> 8) & 0xff00)
-	| ((b << 8) & 0xff0000)
-	| ((b << 24) & 0xff000000);
-      p[i] = a;
-   }
-}
-
-
-/**
- * Get the size of a GL data type.
- *
- * \param type GL data type.
- *
- * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
- * if an invalid type enum.
- */
-GLint
-_mesa_sizeof_type( GLenum type )
-{
-   switch (type) {
-      case GL_BITMAP:
-	 return 0;
-      case GL_UNSIGNED_BYTE:
-         return sizeof(GLubyte);
-      case GL_BYTE:
-	 return sizeof(GLbyte);
-      case GL_UNSIGNED_SHORT:
-	 return sizeof(GLushort);
-      case GL_SHORT:
-	 return sizeof(GLshort);
-      case GL_UNSIGNED_INT:
-	 return sizeof(GLuint);
-      case GL_INT:
-	 return sizeof(GLint);
-      case GL_FLOAT:
-	 return sizeof(GLfloat);
-      case GL_DOUBLE:
-	 return sizeof(GLdouble);
-      case GL_HALF_FLOAT_ARB:
-	 return sizeof(GLhalfARB);
-      default:
-         return -1;
-   }
-}
-
-
-/**
- * Same as _mesa_sizeof_type() but also accepting the packed pixel
- * format data types.
- */
-GLint
-_mesa_sizeof_packed_type( GLenum type )
-{
-   switch (type) {
-      case GL_BITMAP:
-	 return 0;
-      case GL_UNSIGNED_BYTE:
-         return sizeof(GLubyte);
-      case GL_BYTE:
-	 return sizeof(GLbyte);
-      case GL_UNSIGNED_SHORT:
-	 return sizeof(GLushort);
-      case GL_SHORT:
-	 return sizeof(GLshort);
-      case GL_UNSIGNED_INT:
-	 return sizeof(GLuint);
-      case GL_INT:
-	 return sizeof(GLint);
-      case GL_HALF_FLOAT_ARB:
-	 return sizeof(GLhalfARB);
-      case GL_FLOAT:
-	 return sizeof(GLfloat);
-      case GL_UNSIGNED_BYTE_3_3_2:
-         return sizeof(GLubyte);
-      case GL_UNSIGNED_BYTE_2_3_3_REV:
-         return sizeof(GLubyte);
-      case GL_UNSIGNED_SHORT_5_6_5:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_SHORT_5_6_5_REV:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_SHORT_4_4_4_4:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_SHORT_5_5_5_1:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-         return sizeof(GLushort);
-      case GL_UNSIGNED_INT_8_8_8_8:
-         return sizeof(GLuint);
-      case GL_UNSIGNED_INT_8_8_8_8_REV:
-         return sizeof(GLuint);
-      case GL_UNSIGNED_INT_10_10_10_2:
-         return sizeof(GLuint);
-      case GL_UNSIGNED_INT_2_10_10_10_REV:
-         return sizeof(GLuint);
-      case GL_UNSIGNED_SHORT_8_8_MESA:
-      case GL_UNSIGNED_SHORT_8_8_REV_MESA:
-         return sizeof(GLushort);      
-      case GL_UNSIGNED_INT_24_8_EXT:
-         return sizeof(GLuint);
-      default:
-         return -1;
-   }
-}
-
-
-/**
- * Get the number of components in a pixel format.
- *
- * \param format pixel format.
- *
- * \return the number of components in the given format, or -1 if a bad format.
- */
-GLint
-_mesa_components_in_format( GLenum format )
-{
-   switch (format) {
-      case GL_COLOR_INDEX:
-      case GL_COLOR_INDEX1_EXT:
-      case GL_COLOR_INDEX2_EXT:
-      case GL_COLOR_INDEX4_EXT:
-      case GL_COLOR_INDEX8_EXT:
-      case GL_COLOR_INDEX12_EXT:
-      case GL_COLOR_INDEX16_EXT:
-      case GL_STENCIL_INDEX:
-      case GL_DEPTH_COMPONENT:
-      case GL_RED:
-      case GL_RED_INTEGER_EXT:
-      case GL_GREEN:
-      case GL_GREEN_INTEGER_EXT:
-      case GL_BLUE:
-      case GL_BLUE_INTEGER_EXT:
-      case GL_ALPHA:
-      case GL_ALPHA_INTEGER_EXT:
-      case GL_LUMINANCE:
-      case GL_LUMINANCE_INTEGER_EXT:
-      case GL_INTENSITY:
-         return 1;
-      case GL_LUMINANCE_ALPHA:
-      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-	 return 2;
-      case GL_RGB:
-      case GL_RGB_INTEGER_EXT:
-	 return 3;
-      case GL_RGBA:
-      case GL_RGBA_INTEGER_EXT:
-	 return 4;
-      case GL_BGR:
-	 return 3;
-      case GL_BGRA:
-	 return 4;
-      case GL_ABGR_EXT:
-         return 4;
-      case GL_YCBCR_MESA:
-         return 2;
-      case GL_DEPTH_STENCIL_EXT:
-         return 2;
-      case GL_DUDV_ATI:
-      case GL_DU8DV8_ATI:
-         return 2;
-      default:
-         return -1;
-   }
-}
-
-
-/**
- * Get the bytes per pixel of pixel format type pair.
- *
- * \param format pixel format.
- * \param type pixel type.
- *
- * \return bytes per pixel, or -1 if a bad format or type was given.
- */
-GLint
-_mesa_bytes_per_pixel( GLenum format, GLenum type )
-{
-   GLint comps = _mesa_components_in_format( format );
-   if (comps < 0)
-      return -1;
-
-   switch (type) {
-      case GL_BITMAP:
-         return 0;  /* special case */
-      case GL_BYTE:
-      case GL_UNSIGNED_BYTE:
-         return comps * sizeof(GLubyte);
-      case GL_SHORT:
-      case GL_UNSIGNED_SHORT:
-         return comps * sizeof(GLshort);
-      case GL_INT:
-      case GL_UNSIGNED_INT:
-         return comps * sizeof(GLint);
-      case GL_FLOAT:
-         return comps * sizeof(GLfloat);
-      case GL_HALF_FLOAT_ARB:
-         return comps * sizeof(GLhalfARB);
-      case GL_UNSIGNED_BYTE_3_3_2:
-      case GL_UNSIGNED_BYTE_2_3_3_REV:
-         if (format == GL_RGB || format == GL_BGR)
-            return sizeof(GLubyte);
-         else
-            return -1;  /* error */
-      case GL_UNSIGNED_SHORT_5_6_5:
-      case GL_UNSIGNED_SHORT_5_6_5_REV:
-         if (format == GL_RGB || format == GL_BGR)
-            return sizeof(GLushort);
-         else
-            return -1;  /* error */
-      case GL_UNSIGNED_SHORT_4_4_4_4:
-      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-      case GL_UNSIGNED_SHORT_5_5_5_1:
-      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-         if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
-            return sizeof(GLushort);
-         else
-            return -1;
-      case GL_UNSIGNED_INT_8_8_8_8:
-      case GL_UNSIGNED_INT_8_8_8_8_REV:
-      case GL_UNSIGNED_INT_10_10_10_2:
-      case GL_UNSIGNED_INT_2_10_10_10_REV:
-         if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
-            return sizeof(GLuint);
-         else
-            return -1;
-      case GL_UNSIGNED_SHORT_8_8_MESA:
-      case GL_UNSIGNED_SHORT_8_8_REV_MESA:
-         if (format == GL_YCBCR_MESA)
-            return sizeof(GLushort);
-         else
-            return -1;
-      case GL_UNSIGNED_INT_24_8_EXT:
-         if (format == GL_DEPTH_STENCIL_EXT)
-            return sizeof(GLuint);
-         else
-            return -1;
-      default:
-         return -1;
-   }
-}
-
-
-/**
- * Test for a legal pixel format and type.
- *
- * \param format pixel format.
- * \param type pixel type.
- *
- * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
- * otherwise.
- */
-GLboolean
-_mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type )
-{
-   switch (format) {
-      case GL_COLOR_INDEX:
-      case GL_STENCIL_INDEX:
-         switch (type) {
-            case GL_BITMAP:
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-               return GL_TRUE;
-            case GL_HALF_FLOAT_ARB:
-               return ctx->Extensions.ARB_half_float_pixel;
-            default:
-               return GL_FALSE;
-         }
-      case GL_RED:
-      case GL_GREEN:
-      case GL_BLUE:
-      case GL_ALPHA:
-#if 0 /* not legal!  see table 3.6 of the 1.5 spec */
-      case GL_INTENSITY:
-#endif
-      case GL_LUMINANCE:
-      case GL_LUMINANCE_ALPHA:
-      case GL_DEPTH_COMPONENT:
-         switch (type) {
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-               return GL_TRUE;
-            case GL_HALF_FLOAT_ARB:
-               return ctx->Extensions.ARB_half_float_pixel;
-            default:
-               return GL_FALSE;
-         }
-      case GL_RGB:
-         switch (type) {
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-            case GL_UNSIGNED_BYTE_3_3_2:
-            case GL_UNSIGNED_BYTE_2_3_3_REV:
-            case GL_UNSIGNED_SHORT_5_6_5:
-            case GL_UNSIGNED_SHORT_5_6_5_REV:
-               return GL_TRUE;
-            case GL_HALF_FLOAT_ARB:
-               return ctx->Extensions.ARB_half_float_pixel;
-            default:
-               return GL_FALSE;
-         }
-      case GL_BGR:
-         switch (type) {
-            /* NOTE: no packed types are supported with BGR.  That's
-             * intentional, according to the GL spec.
-             */
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-               return GL_TRUE;
-            case GL_HALF_FLOAT_ARB:
-               return ctx->Extensions.ARB_half_float_pixel;
-            default:
-               return GL_FALSE;
-         }
-      case GL_RGBA:
-      case GL_BGRA:
-      case GL_ABGR_EXT:
-         switch (type) {
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-            case GL_UNSIGNED_SHORT_4_4_4_4:
-            case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-            case GL_UNSIGNED_SHORT_5_5_5_1:
-            case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-            case GL_UNSIGNED_INT_8_8_8_8:
-            case GL_UNSIGNED_INT_8_8_8_8_REV:
-            case GL_UNSIGNED_INT_10_10_10_2:
-            case GL_UNSIGNED_INT_2_10_10_10_REV:
-               return GL_TRUE;
-            case GL_HALF_FLOAT_ARB:
-               return ctx->Extensions.ARB_half_float_pixel;
-            default:
-               return GL_FALSE;
-         }
-      case GL_YCBCR_MESA:
-         if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
-             type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
-            return GL_TRUE;
-         else
-            return GL_FALSE;
-      case GL_DEPTH_STENCIL_EXT:
-         if (ctx->Extensions.EXT_packed_depth_stencil
-             && type == GL_UNSIGNED_INT_24_8_EXT)
-            return GL_TRUE;
-         else
-            return GL_FALSE;
-      case GL_DUDV_ATI:
-      case GL_DU8DV8_ATI:
-         switch (type) {
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-            case GL_FLOAT:
-               return GL_TRUE;
-            default:
-               return GL_FALSE;
-         }
-      case GL_RED_INTEGER_EXT:
-      case GL_GREEN_INTEGER_EXT:
-      case GL_BLUE_INTEGER_EXT:
-      case GL_ALPHA_INTEGER_EXT:
-      case GL_RGB_INTEGER_EXT:
-      case GL_RGBA_INTEGER_EXT:
-      case GL_BGR_INTEGER_EXT:
-      case GL_BGRA_INTEGER_EXT:
-      case GL_LUMINANCE_INTEGER_EXT:
-      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-         switch (type) {
-            case GL_BYTE:
-            case GL_UNSIGNED_BYTE:
-            case GL_SHORT:
-            case GL_UNSIGNED_SHORT:
-            case GL_INT:
-            case GL_UNSIGNED_INT:
-               return ctx->Extensions.EXT_texture_integer;
-            default:
-               return GL_FALSE;
-         }
-
-      default:
-         ; /* fall-through */
-   }
-   return GL_FALSE;
-}
-
-
-/**
- * Test if the given image format is a color/RGBA format (i.e., not color
- * index, depth, stencil, etc).
- * \param format  the image format value (may by an internal texture format)
- * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
- */
-GLboolean
-_mesa_is_color_format(GLenum format)
-{
-   switch (format) {
-      case GL_RED:
-      case GL_GREEN:
-      case GL_BLUE:
-      case GL_ALPHA:
-      case GL_ALPHA4:
-      case GL_ALPHA8:
-      case GL_ALPHA12:
-      case GL_ALPHA16:
-      case 1:
-      case GL_LUMINANCE:
-      case GL_LUMINANCE4:
-      case GL_LUMINANCE8:
-      case GL_LUMINANCE12:
-      case GL_LUMINANCE16:
-      case 2:
-      case GL_LUMINANCE_ALPHA:
-      case GL_LUMINANCE4_ALPHA4:
-      case GL_LUMINANCE6_ALPHA2:
-      case GL_LUMINANCE8_ALPHA8:
-      case GL_LUMINANCE12_ALPHA4:
-      case GL_LUMINANCE12_ALPHA12:
-      case GL_LUMINANCE16_ALPHA16:
-      case GL_INTENSITY:
-      case GL_INTENSITY4:
-      case GL_INTENSITY8:
-      case GL_INTENSITY12:
-      case GL_INTENSITY16:
-      case 3:
-      case GL_RGB:
-      case GL_BGR:
-      case GL_R3_G3_B2:
-      case GL_RGB4:
-      case GL_RGB5:
-      case GL_RGB8:
-      case GL_RGB10:
-      case GL_RGB12:
-      case GL_RGB16:
-      case 4:
-      case GL_ABGR_EXT:
-      case GL_RGBA:
-      case GL_BGRA:
-      case GL_RGBA2:
-      case GL_RGBA4:
-      case GL_RGB5_A1:
-      case GL_RGBA8:
-      case GL_RGB10_A2:
-      case GL_RGBA12:
-      case GL_RGBA16:
-      /* float texture formats */
-      case GL_ALPHA16F_ARB:
-      case GL_ALPHA32F_ARB:
-      case GL_LUMINANCE16F_ARB:
-      case GL_LUMINANCE32F_ARB:
-      case GL_LUMINANCE_ALPHA16F_ARB:
-      case GL_LUMINANCE_ALPHA32F_ARB:
-      case GL_INTENSITY16F_ARB:
-      case GL_INTENSITY32F_ARB:
-      case GL_RGB16F_ARB:
-      case GL_RGB32F_ARB:
-      case GL_RGBA16F_ARB:
-      case GL_RGBA32F_ARB:
-      /* compressed formats */
-      case GL_COMPRESSED_ALPHA:
-      case GL_COMPRESSED_LUMINANCE:
-      case GL_COMPRESSED_LUMINANCE_ALPHA:
-      case GL_COMPRESSED_INTENSITY:
-      case GL_COMPRESSED_RGB:
-      case GL_COMPRESSED_RGBA:
-      case GL_RGB_S3TC:
-      case GL_RGB4_S3TC:
-      case GL_RGBA_S3TC:
-      case GL_RGBA4_S3TC:
-      case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-      case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-      case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-      case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-      case GL_COMPRESSED_RGB_FXT1_3DFX:
-      case GL_COMPRESSED_RGBA_FXT1_3DFX:
-#if FEATURE_EXT_texture_sRGB
-      case GL_SRGB_EXT:
-      case GL_SRGB8_EXT:
-      case GL_SRGB_ALPHA_EXT:
-      case GL_SRGB8_ALPHA8_EXT:
-      case GL_SLUMINANCE_ALPHA_EXT:
-      case GL_SLUMINANCE8_ALPHA8_EXT:
-      case GL_SLUMINANCE_EXT:
-      case GL_SLUMINANCE8_EXT:
-      case GL_COMPRESSED_SRGB_EXT:
-      case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
-      case GL_COMPRESSED_SRGB_ALPHA_EXT:
-      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
-      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
-      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
-      case GL_COMPRESSED_SLUMINANCE_EXT:
-      case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
-#endif /* FEATURE_EXT_texture_sRGB */
-         return GL_TRUE;
-      /* signed texture formats */
-      case GL_RGBA_SNORM:
-      case GL_RGBA8_SNORM:
-         return GL_TRUE;
-      case GL_YCBCR_MESA:  /* not considered to be RGB */
-         /* fall-through */
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a color index format.
- */
-GLboolean
-_mesa_is_index_format(GLenum format)
-{
-   switch (format) {
-      case GL_COLOR_INDEX:
-      case GL_COLOR_INDEX1_EXT:
-      case GL_COLOR_INDEX2_EXT:
-      case GL_COLOR_INDEX4_EXT:
-      case GL_COLOR_INDEX8_EXT:
-      case GL_COLOR_INDEX12_EXT:
-      case GL_COLOR_INDEX16_EXT:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a depth component format.
- */
-GLboolean
-_mesa_is_depth_format(GLenum format)
-{
-   switch (format) {
-      case GL_DEPTH_COMPONENT:
-      case GL_DEPTH_COMPONENT16:
-      case GL_DEPTH_COMPONENT24:
-      case GL_DEPTH_COMPONENT32:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a stencil format.
- */
-GLboolean
-_mesa_is_stencil_format(GLenum format)
-{
-   switch (format) {
-      case GL_STENCIL_INDEX:
-      case GL_DEPTH_STENCIL:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a YCbCr format.
- */
-GLboolean
-_mesa_is_ycbcr_format(GLenum format)
-{
-   switch (format) {
-      case GL_YCBCR_MESA:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a depth+stencil format.
- */
-GLboolean
-_mesa_is_depthstencil_format(GLenum format)
-{
-   switch (format) {
-      case GL_DEPTH24_STENCIL8_EXT:
-      case GL_DEPTH_STENCIL_EXT:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a depth or stencil format.
- */
-GLboolean
-_mesa_is_depth_or_stencil_format(GLenum format)
-{
-   switch (format) {
-      case GL_DEPTH_COMPONENT:
-      case GL_DEPTH_COMPONENT16:
-      case GL_DEPTH_COMPONENT24:
-      case GL_DEPTH_COMPONENT32:
-      case GL_STENCIL_INDEX:
-      case GL_STENCIL_INDEX1_EXT:
-      case GL_STENCIL_INDEX4_EXT:
-      case GL_STENCIL_INDEX8_EXT:
-      case GL_STENCIL_INDEX16_EXT:
-      case GL_DEPTH_STENCIL_EXT:
-      case GL_DEPTH24_STENCIL8_EXT:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given image format is a dudv format.
- */
-GLboolean
-_mesa_is_dudv_format(GLenum format)
-{
-   switch (format) {
-      case GL_DUDV_ATI:
-      case GL_DU8DV8_ATI:
-         return GL_TRUE;
-      default:
-         return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the given format is an integer (non-normalized) format.
- */
-GLboolean
-_mesa_is_integer_format(GLenum format)
-{
-   switch (format) {
-   case GL_RED_INTEGER_EXT:
-   case GL_GREEN_INTEGER_EXT:
-   case GL_BLUE_INTEGER_EXT:
-   case GL_ALPHA_INTEGER_EXT:
-   case GL_RGB_INTEGER_EXT:
-   case GL_RGBA_INTEGER_EXT:
-   case GL_BGR_INTEGER_EXT:
-   case GL_BGRA_INTEGER_EXT:
-   case GL_LUMINANCE_INTEGER_EXT:
-   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-      return GL_TRUE;
-   default:
-      return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if an image format is a supported compressed format.
- * \param format the internal format token provided by the user.
- * \return GL_TRUE if compressed, GL_FALSE if uncompressed
- */
-GLboolean
-_mesa_is_compressed_format(GLcontext *ctx, GLenum format)
-{
-   switch (format) {
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-      return ctx->Extensions.EXT_texture_compression_s3tc;
-   case GL_RGB_S3TC:
-   case GL_RGB4_S3TC:
-   case GL_RGBA_S3TC:
-   case GL_RGBA4_S3TC:
-      return ctx->Extensions.S3_s3tc;
-   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
-      return ctx->Extensions.EXT_texture_sRGB
-         && ctx->Extensions.EXT_texture_compression_s3tc;
-   case GL_COMPRESSED_RGB_FXT1_3DFX:
-   case GL_COMPRESSED_RGBA_FXT1_3DFX:
-      return ctx->Extensions.TDFX_texture_compression_FXT1;
-   default:
-      return GL_FALSE;
-   }
-}
-
-
-/**
- * Return the address of a specific pixel in an image (1D, 2D or 3D).
- *
- * Pixel unpacking/packing parameters are observed according to \p packing.
- *
- * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
- * \param image  starting address of image data
- * \param width  the image width
- * \param height  theimage height
- * \param format  the pixel format
- * \param type  the pixel data type
- * \param packing  the pixelstore attributes
- * \param img  which image in the volume (0 for 1D or 2D images)
- * \param row  row of pixel in the image (0 for 1D images)
- * \param column column of pixel in the image
- * 
- * \return address of pixel on success, or NULL on error.
- *
- * \sa gl_pixelstore_attrib.
- */
-GLvoid *
-_mesa_image_address( GLuint dimensions,
-                     const struct gl_pixelstore_attrib *packing,
-                     const GLvoid *image,
-                     GLsizei width, GLsizei height,
-                     GLenum format, GLenum type,
-                     GLint img, GLint row, GLint column )
-{
-   GLint alignment;        /* 1, 2 or 4 */
-   GLint pixels_per_row;
-   GLint rows_per_image;
-   GLint skiprows;
-   GLint skippixels;
-   GLint skipimages;       /* for 3-D volume images */
-   GLubyte *pixel_addr;
-
-   ASSERT(dimensions >= 1 && dimensions <= 3);
-
-   alignment = packing->Alignment;
-   if (packing->RowLength > 0) {
-      pixels_per_row = packing->RowLength;
-   }
-   else {
-      pixels_per_row = width;
-   }
-   if (packing->ImageHeight > 0) {
-      rows_per_image = packing->ImageHeight;
-   }
-   else {
-      rows_per_image = height;
-   }
-
-   skippixels = packing->SkipPixels;
-   /* Note: SKIP_ROWS _is_ used for 1D images */
-   skiprows = packing->SkipRows;
-   /* Note: SKIP_IMAGES is only used for 3D images */
-   skipimages = (dimensions == 3) ? packing->SkipImages : 0;
-
-   if (type == GL_BITMAP) {
-      /* BITMAP data */
-      GLint comp_per_pixel;   /* components per pixel */
-      GLint bytes_per_comp;   /* bytes per component */
-      GLint bytes_per_row;
-      GLint bytes_per_image;
-
-      /* Compute bytes per component */
-      bytes_per_comp = _mesa_sizeof_packed_type( type );
-      if (bytes_per_comp < 0) {
-         return NULL;
-      }
-
-      /* Compute number of components per pixel */
-      comp_per_pixel = _mesa_components_in_format( format );
-      if (comp_per_pixel < 0) {
-         return NULL;
-      }
-
-      bytes_per_row = alignment
-                    * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
-
-      bytes_per_image = bytes_per_row * rows_per_image;
-
-      pixel_addr = (GLubyte *) image
-                 + (skipimages + img) * bytes_per_image
-                 + (skiprows + row) * bytes_per_row
-                 + (skippixels + column) / 8;
-   }
-   else {
-      /* Non-BITMAP data */
-      GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
-      GLint topOfImage;
-
-      bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
-
-      /* The pixel type and format should have been error checked earlier */
-      assert(bytes_per_pixel > 0);
-
-      bytes_per_row = pixels_per_row * bytes_per_pixel;
-      remainder = bytes_per_row % alignment;
-      if (remainder > 0)
-         bytes_per_row += (alignment - remainder);
-
-      ASSERT(bytes_per_row % alignment == 0);
-
-      bytes_per_image = bytes_per_row * rows_per_image;
-
-      if (packing->Invert) {
-         /* set pixel_addr to the last row */
-         topOfImage = bytes_per_row * (height - 1);
-         bytes_per_row = -bytes_per_row;
-      }
-      else {
-         topOfImage = 0;
-      }
-
-      /* compute final pixel address */
-      pixel_addr = (GLubyte *) image
-                 + (skipimages + img) * bytes_per_image
-                 + topOfImage
-                 + (skiprows + row) * bytes_per_row
-                 + (skippixels + column) * bytes_per_pixel;
-   }
-
-   return (GLvoid *) pixel_addr;
-}
-
-
-GLvoid *
-_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
-                       const GLvoid *image,
-                       GLsizei width,
-                       GLenum format, GLenum type,
-                       GLint column )
-{
-   return _mesa_image_address(1, packing, image, width, 1,
-                              format, type, 0, 0, column);
-}
-
-
-GLvoid *
-_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
-                       const GLvoid *image,
-                       GLsizei width, GLsizei height,
-                       GLenum format, GLenum type,
-                       GLint row, GLint column )
-{
-   return _mesa_image_address(2, packing, image, width, height,
-                              format, type, 0, row, column);
-}
-
-
-GLvoid *
-_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
-                       const GLvoid *image,
-                       GLsizei width, GLsizei height,
-                       GLenum format, GLenum type,
-                       GLint img, GLint row, GLint column )
-{
-   return _mesa_image_address(3, packing, image, width, height,
-                              format, type, img, row, column);
-}
-
-
-
-/**
- * Compute the stride (in bytes) between image rows.
- *
- * \param packing the pixelstore attributes
- * \param width image width.
- * \param format pixel format.
- * \param type pixel data type.
- * 
- * \return the stride in bytes for the given parameters, or -1 if error
- */
-GLint
-_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
-                        GLint width, GLenum format, GLenum type )
-{
-   GLint bytesPerRow, remainder;
-
-   ASSERT(packing);
-
-   if (type == GL_BITMAP) {
-      if (packing->RowLength == 0) {
-         bytesPerRow = (width + 7) / 8;
-      }
-      else {
-         bytesPerRow = (packing->RowLength + 7) / 8;
-      }
-   }
-   else {
-      /* Non-BITMAP data */
-      const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
-      if (bytesPerPixel <= 0)
-         return -1;  /* error */
-      if (packing->RowLength == 0) {
-         bytesPerRow = bytesPerPixel * width;
-      }
-      else {
-         bytesPerRow = bytesPerPixel * packing->RowLength;
-      }
-   }
-
-   remainder = bytesPerRow % packing->Alignment;
-   if (remainder > 0) {
-      bytesPerRow += (packing->Alignment - remainder);
-   }
-
-   if (packing->Invert) {
-      /* negate the bytes per row (negative row stride) */
-      bytesPerRow = -bytesPerRow;
-   }
-
-   return bytesPerRow;
-}
-
-
-#if _HAVE_FULL_GL
-
-/*
- * Compute the stride between images in a 3D texture (in bytes) for the given
- * pixel packing parameters and image width, format and type.
- */
-GLint
-_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
-                          GLint width, GLint height,
-                          GLenum format, GLenum type )
-{
-   GLint bytesPerRow, bytesPerImage, remainder;
-
-   ASSERT(packing);
-
-   if (type == GL_BITMAP) {
-      if (packing->RowLength == 0) {
-         bytesPerRow = (width + 7) / 8;
-      }
-      else {
-         bytesPerRow = (packing->RowLength + 7) / 8;
-      }
-   }
-   else {
-      const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
-
-      if (bytesPerPixel <= 0)
-         return -1;  /* error */
-      if (packing->RowLength == 0) {
-         bytesPerRow = bytesPerPixel * width;
-      }
-      else {
-         bytesPerRow = bytesPerPixel * packing->RowLength;
-      }
-   }
-
-   remainder = bytesPerRow % packing->Alignment;
-   if (remainder > 0)
-      bytesPerRow += (packing->Alignment - remainder);
-
-   if (packing->ImageHeight == 0)
-      bytesPerImage = bytesPerRow * height;
-   else
-      bytesPerImage = bytesPerRow * packing->ImageHeight;
-
-   return bytesPerImage;
-}
-
-
-/*
- * Unpack a 32x32 pixel polygon stipple from user memory using the
- * current pixel unpack settings.
- */
-void
-_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
-                              const struct gl_pixelstore_attrib *unpacking )
-{
-   GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking);
-   if (ptrn) {
-      /* Convert pattern from GLubytes to GLuints and handle big/little
-       * endian differences
-       */
-      GLubyte *p = ptrn;
-      GLint i;
-      for (i = 0; i < 32; i++) {
-         dest[i] = (p[0] << 24)
-                 | (p[1] << 16)
-                 | (p[2] <<  8)
-                 | (p[3]      );
-         p += 4;
-      }
-      free(ptrn);
-   }
-}
-
-
-/*
- * Pack polygon stipple into user memory given current pixel packing
- * settings.
- */
-void
-_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest,
-                            const struct gl_pixelstore_attrib *packing )
-{
-   /* Convert pattern from GLuints to GLubytes to handle big/little
-    * endian differences.
-    */
-   GLubyte ptrn[32*4];
-   GLint i;
-   for (i = 0; i < 32; i++) {
-      ptrn[i * 4 + 0] = (GLubyte) ((pattern[i] >> 24) & 0xff);
-      ptrn[i * 4 + 1] = (GLubyte) ((pattern[i] >> 16) & 0xff);
-      ptrn[i * 4 + 2] = (GLubyte) ((pattern[i] >> 8 ) & 0xff);
-      ptrn[i * 4 + 3] = (GLubyte) ((pattern[i]      ) & 0xff);
-   }
-
-   _mesa_pack_bitmap(32, 32, ptrn, dest, packing);
-}
-
-
-/*
- * Unpack bitmap data.  Resulting data will be in most-significant-bit-first
- * order with row alignment = 1 byte.
- */
-GLvoid *
-_mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
-                     const struct gl_pixelstore_attrib *packing )
-{
-   GLint bytes, row, width_in_bytes;
-   GLubyte *buffer, *dst;
-
-   if (!pixels)
-      return NULL;
-
-   /* Alloc dest storage */
-   bytes = ((width + 7) / 8 * height);
-   buffer = (GLubyte *) malloc( bytes );
-   if (!buffer)
-      return NULL;
-
-   width_in_bytes = CEILING( width, 8 );
-   dst = buffer;
-   for (row = 0; row < height; row++) {
-      const GLubyte *src = (const GLubyte *)
-         _mesa_image_address2d(packing, pixels, width, height,
-                               GL_COLOR_INDEX, GL_BITMAP, row, 0);
-      if (!src) {
-         free(buffer);
-         return NULL;
-      }
-
-      if ((packing->SkipPixels & 7) == 0) {
-         memcpy( dst, src, width_in_bytes );
-         if (packing->LsbFirst) {
-            flip_bytes( dst, width_in_bytes );
-         }
-      }
-      else {
-         /* handling SkipPixels is a bit tricky (no pun intended!) */
-         GLint i;
-         if (packing->LsbFirst) {
-            GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
-            GLubyte dstMask = 128;
-            const GLubyte *s = src;
-            GLubyte *d = dst;
-            *d = 0;
-            for (i = 0; i < width; i++) {
-               if (*s & srcMask) {
-                  *d |= dstMask;
-               }
-               if (srcMask == 128) {
-                  srcMask = 1;
-                  s++;
-               }
-               else {
-                  srcMask = srcMask << 1;
-               }
-               if (dstMask == 1) {
-                  dstMask = 128;
-                  d++;
-                  *d = 0;
-               }
-               else {
-                  dstMask = dstMask >> 1;
-               }
-            }
-         }
-         else {
-            GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
-            GLubyte dstMask = 128;
-            const GLubyte *s = src;
-            GLubyte *d = dst;
-            *d = 0;
-            for (i = 0; i < width; i++) {
-               if (*s & srcMask) {
-                  *d |= dstMask;
-               }
-               if (srcMask == 1) {
-                  srcMask = 128;
-                  s++;
-               }
-               else {
-                  srcMask = srcMask >> 1;
-               }
-               if (dstMask == 1) {
-                  dstMask = 128;
-                  d++;
-                  *d = 0;
-               }
-               else {
-                  dstMask = dstMask >> 1;
-               }
-            }
-         }
-      }
-      dst += width_in_bytes;
-   }
-
-   return buffer;
-}
-
-
-/*
- * Pack bitmap data.
- */
-void
-_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
-                   GLubyte *dest, const struct gl_pixelstore_attrib *packing )
-{
-   GLint row, width_in_bytes;
-   const GLubyte *src;
-
-   if (!source)
-      return;
-
-   width_in_bytes = CEILING( width, 8 );
-   src = source;
-   for (row = 0; row < height; row++) {
-      GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dest,
-                       width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
-      if (!dst)
-         return;
-
-      if ((packing->SkipPixels & 7) == 0) {
-         memcpy( dst, src, width_in_bytes );
-         if (packing->LsbFirst) {
-            flip_bytes( dst, width_in_bytes );
-         }
-      }
-      else {
-         /* handling SkipPixels is a bit tricky (no pun intended!) */
-         GLint i;
-         if (packing->LsbFirst) {
-            GLubyte srcMask = 128;
-            GLubyte dstMask = 1 << (packing->SkipPixels & 0x7);
-            const GLubyte *s = src;
-            GLubyte *d = dst;
-            *d = 0;
-            for (i = 0; i < width; i++) {
-               if (*s & srcMask) {
-                  *d |= dstMask;
-               }
-               if (srcMask == 1) {
-                  srcMask = 128;
-                  s++;
-               }
-               else {
-                  srcMask = srcMask >> 1;
-               }
-               if (dstMask == 128) {
-                  dstMask = 1;
-                  d++;
-                  *d = 0;
-               }
-               else {
-                  dstMask = dstMask << 1;
-               }
-            }
-         }
-         else {
-            GLubyte srcMask = 128;
-            GLubyte dstMask = 128 >> (packing->SkipPixels & 0x7);
-            const GLubyte *s = src;
-            GLubyte *d = dst;
-            *d = 0;
-            for (i = 0; i < width; i++) {
-               if (*s & srcMask) {
-                  *d |= dstMask;
-               }
-               if (srcMask == 1) {
-                  srcMask = 128;
-                  s++;
-               }
-               else {
-                  srcMask = srcMask >> 1;
-               }
-               if (dstMask == 1) {
-                  dstMask = 128;
-                  d++;
-                  *d = 0;
-               }
-               else {
-                  dstMask = dstMask >> 1;
-               }
-            }
-         }
-      }
-      src += width_in_bytes;
-   }
-}
-
-
-/**
- * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
- * This is typically used to convert a bitmap into a GLubyte/pixel texture.
- * "On" bits will set texels to \p onValue.
- * "Off" bits will not modify texels.
- * \param width  src bitmap width in pixels
- * \param height  src bitmap height in pixels
- * \param unpack  bitmap unpacking state
- * \param bitmap  the src bitmap data
- * \param destBuffer  start of dest buffer
- * \param destStride  row stride in dest buffer
- * \param onValue  if bit is 1, set destBuffer pixel to this value
- */
-void
-_mesa_expand_bitmap(GLsizei width, GLsizei height,
-                    const struct gl_pixelstore_attrib *unpack,
-                    const GLubyte *bitmap,
-                    GLubyte *destBuffer, GLint destStride,
-                    GLubyte onValue)
-{
-   const GLubyte *srcRow = (const GLubyte *)
-      _mesa_image_address2d(unpack, bitmap, width, height,
-                            GL_COLOR_INDEX, GL_BITMAP, 0, 0);
-   const GLint srcStride = _mesa_image_row_stride(unpack, width,
-                                                  GL_COLOR_INDEX, GL_BITMAP);
-   GLint row, col;
-
-#define SET_PIXEL(COL, ROW) \
-   destBuffer[(ROW) * destStride + (COL)] = onValue;
-
-   for (row = 0; row < height; row++) {
-      const GLubyte *src = srcRow;
-
-      if (unpack->LsbFirst) {
-         /* Lsb first */
-         GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
-         for (col = 0; col < width; col++) {
-
-            if (*src & mask) {
-               SET_PIXEL(col, row);
-            }
-
-            if (mask == 128U) {
-               src++;
-               mask = 1U;
-            }
-            else {
-               mask = mask << 1;
-            }
-         }
-
-         /* get ready for next row */
-         if (mask != 1)
-            src++;
-      }
-      else {
-         /* Msb first */
-         GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
-         for (col = 0; col < width; col++) {
-
-            if (*src & mask) {
-               SET_PIXEL(col, row);
-            }
-
-            if (mask == 1U) {
-               src++;
-               mask = 128U;
-            }
-            else {
-               mask = mask >> 1;
-            }
-         }
-
-         /* get ready for next row */
-         if (mask != 128)
-            src++;
-      }
-
-      srcRow += srcStride;
-   } /* row */
-
-#undef SET_PIXEL
-}
-
-
-/**********************************************************************/
-/*****                  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->PixelMaps.RtoR.Size - 1);
-   const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);
-   const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);
-   const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);
-   const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;
-   const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;
-   const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;
-   const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;
-   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])
-{
-   const GLint max = table->Size - 1;
-   const GLfloat scale = (GLfloat) max;
-   const GLfloat *lut = table->TableF;
-   GLuint i;
-
-   if (!table->TableF || table->Size == 0)
-      return;
-
-   switch (table->_BaseFormat) {
-      case GL_INTENSITY:
-         /* replace RGBA with 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;
-         }
-         break;
-      case GL_LUMINANCE:
-         /* replace RGB with L */
-         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;
-         }
-         break;
-      case GL_ALPHA:
-         /* replace A with A */
-         for (i = 0; i < n; i++) {
-            GLint j = IROUND(rgba[i][ACOMP] * scale);
-            rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
-         }
-         break;
-      case GL_LUMINANCE_ALPHA:
-         /* replace RGBA with LLLA */
-         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;;
-         }
-         break;
-      case GL_RGB:
-         /* replace RGB with RGB */
-         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];
-         }
-         break;
-      case GL_RGBA:
-         /* replace RGBA with RGBA */
-         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];
-         }
-         break;
-      default:
-         _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
-         return;
-   }
-}
-
-
-
-/**
- * Apply a color table lookup to an array of ubyte/RGBA colors.
- */
-void
-_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
-                        GLuint n, GLubyte rgba[][4])
-{
-   const GLubyte *lut = table->TableUB;
-   const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;
-   GLuint i;
-
-   if (!table->TableUB || table->Size == 0)
-      return;
-
-   switch (table->_BaseFormat) {
-   case GL_INTENSITY:
-      /* replace RGBA with I */
-      if (table->Size == 256) {
-         for (i = 0; i < n; i++) {
-            const GLubyte c = lut[rgba[i][RCOMP]];
-            rgba[i][RCOMP] =
-            rgba[i][GCOMP] =
-            rgba[i][BCOMP] =
-            rgba[i][ACOMP] = c;
-         }
-      }
-      else {
-         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->Size == 256) {
-         for (i = 0; i < n; i++) {
-            const GLubyte c = lut[rgba[i][RCOMP]];
-            rgba[i][RCOMP] =
-            rgba[i][GCOMP] =
-            rgba[i][BCOMP] = c;
-         }
-      }
-      else {
-         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->Size == 256) {
-         for (i = 0; i < n; i++) {
-            rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
-         }
-      }
-      else {
-         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->Size == 256) {
-         for (i = 0; i < n; i++) {
-            GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];
-            GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;
-            rgba[i][RCOMP] =
-            rgba[i][GCOMP] =
-            rgba[i][BCOMP] = l;
-            rgba[i][ACOMP] = a;
-         }
-      }
-      else {
-         for (i = 0; i < n; i++) {
-            GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
-            GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
-            GLubyte luminance = lut[jL * 2 + 0];
-            GLubyte alpha     = lut[jA * 2 + 1];
-            rgba[i][RCOMP] =
-            rgba[i][GCOMP] =
-            rgba[i][BCOMP] = luminance;
-            rgba[i][ACOMP] = alpha;
-         }
-      }
-      break;
-   case GL_RGB:
-      if (table->Size == 256) {
-         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 {
-         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:
-      if (table->Size == 256) {
-         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 {
-         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;
-   }
-}
-
-
-
-/*
- * 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->PixelMaps.ItoR.Size - 1;
-   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
-   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
-   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
-   const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;
-   const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;
-   const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;
-   const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;
-   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 ubyte color indexes to ubyte/RGBA values.
- */
-void
-_mesa_map_ci8_to_rgba8(const GLcontext *ctx, GLuint n, const GLubyte index[],
-                       GLubyte rgba[][4])
-{
-   GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
-   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
-   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
-   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
-   const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;
-   const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;
-   const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;
-   const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;
-   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];
-   }
-}
-
-
-void
-_mesa_scale_and_bias_depth(const GLcontext *ctx, GLuint n,
-                           GLfloat depthValues[])
-{
-   const GLfloat scale = ctx->Pixel.DepthScale;
-   const GLfloat bias = ctx->Pixel.DepthBias;
-   GLuint i;
-   for (i = 0; i < n; i++) {
-      GLfloat d = depthValues[i] * scale + bias;
-      depthValues[i] = CLAMP(d, 0.0F, 1.0F);
-   }
-}
-
-
-void
-_mesa_scale_and_bias_depth_uint(const GLcontext *ctx, GLuint n,
-                                GLuint depthValues[])
-{
-   const GLdouble max = (double) 0xffffffff;
-   const GLdouble scale = ctx->Pixel.DepthScale;
-   const GLdouble bias = ctx->Pixel.DepthBias * max;
-   GLuint i;
-   for (i = 0; i < n; i++) {
-      GLdouble d = (GLdouble) depthValues[i] * scale + bias;
-      d = CLAMP(d, 0.0, max);
-      depthValues[i] = (GLuint) d;
-   }
-}
-
-
-
-/*
- * Update the min/max values from an array of fragment colors.
- */
-static void
-update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
-{
-   GLuint i;
-   for (i = 0; i < n; i++) {
-      /* update mins */
-      if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP])
-         ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP];
-      if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP])
-         ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP];
-      if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP])
-         ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP];
-      if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP])
-         ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP];
-
-      /* update maxs */
-      if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP])
-         ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP];
-      if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP])
-         ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP];
-      if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP])
-         ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP];
-      if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP])
-         ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP];
-   }
-}
-
-
-/*
- * Update the histogram values from an array of fragment colors.
- */
-static void
-update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
-{
-   const GLint max = ctx->Histogram.Width - 1;
-   GLfloat w = (GLfloat) max;
-   GLuint i;
-
-   if (ctx->Histogram.Width == 0)
-      return;
-
-   for (i = 0; i < n; i++) {
-      GLint ri = IROUND(rgba[i][RCOMP] * w);
-      GLint gi = IROUND(rgba[i][GCOMP] * w);
-      GLint bi = IROUND(rgba[i][BCOMP] * w);
-      GLint ai = IROUND(rgba[i][ACOMP] * w);
-      ri = CLAMP(ri, 0, max);
-      gi = CLAMP(gi, 0, max);
-      bi = CLAMP(bi, 0, max);
-      ai = CLAMP(ai, 0, max);
-      ctx->Histogram.Count[ri][RCOMP]++;
-      ctx->Histogram.Count[gi][GCOMP]++;
-      ctx->Histogram.Count[bi][BCOMP]++;
-      ctx->Histogram.Count[ai][ACOMP]++;
-   }
-}
-
-
-/**
- * Apply various pixel transfer operations to an array of RGBA pixels
- * as indicated by the transferOps bitmask
- */
-void
-_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
-                              GLuint n, GLfloat rgba[][4])
-{
-   /* scale & bias */
-   if (transferOps & IMAGE_SCALE_BIAS_BIT) {
-      _mesa_scale_and_bias_rgba(n, rgba,
-                                ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
-                                ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
-                                ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
-                                ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
-   }
-   /* color map lookup */
-   if (transferOps & IMAGE_MAP_COLOR_BIT) {
-      _mesa_map_rgba( ctx, n, rgba );
-   }
-   /* GL_COLOR_TABLE lookup */
-   if (transferOps & IMAGE_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba);
-   }
-   /* convolution */
-   if (transferOps & IMAGE_CONVOLUTION_BIT) {
-      /* this has to be done in the calling code */
-      _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
-   }
-   /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
-   if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
-      _mesa_scale_and_bias_rgba(n, rgba,
-                                ctx->Pixel.PostConvolutionScale[RCOMP],
-                                ctx->Pixel.PostConvolutionScale[GCOMP],
-                                ctx->Pixel.PostConvolutionScale[BCOMP],
-                                ctx->Pixel.PostConvolutionScale[ACOMP],
-                                ctx->Pixel.PostConvolutionBias[RCOMP],
-                                ctx->Pixel.PostConvolutionBias[GCOMP],
-                                ctx->Pixel.PostConvolutionBias[BCOMP],
-                                ctx->Pixel.PostConvolutionBias[ACOMP]);
-   }
-   /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
-   if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba);
-   }
-   /* color matrix transform */
-   if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
-      _mesa_transform_rgba(ctx, n, rgba);
-   }
-   /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
-   if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba);
-   }
-   /* update histogram count */
-   if (transferOps & IMAGE_HISTOGRAM_BIT) {
-      update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
-   }
-   /* update min/max values */
-   if (transferOps & IMAGE_MIN_MAX_BIT) {
-      update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
-   }
-   /* clamping to [0,1] */
-   if (transferOps & IMAGE_CLAMP_BIT) {
-      GLuint i;
-      for (i = 0; i < n; i++) {
-         rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
-         rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
-         rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
-         rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
-      }
-   }
-}
-
-
-/*
- * Apply color index shift and offset to an array of pixels.
- */
-static void
-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 shift, offset and table lookup to an array
- * of color indexes;
- */
-void
-_mesa_apply_ci_transfer_ops(const GLcontext *ctx, GLbitfield transferOps,
-                            GLuint n, GLuint indexes[])
-{
-   if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
-      shift_and_offset_ci(ctx, n, indexes);
-   }
-   if (transferOps & IMAGE_MAP_COLOR_BIT) {
-      const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
-      GLuint i;
-      for (i = 0; i < n; i++) {
-         const GLuint j = indexes[i] & mask;
-         indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
-      }
-   }
-}
-
-
-/**
- * Apply stencil index shift, offset and table lookup to an array
- * of stencil values.
- */
-void
-_mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n,
-                                 GLstencil stencil[])
-{
-   if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
-      const GLint offset = ctx->Pixel.IndexOffset;
-      GLint shift = ctx->Pixel.IndexShift;
-      GLuint i;
-      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;
-         }
-      }
-   }
-   if (ctx->Pixel.MapStencilFlag) {
-      GLuint mask = ctx->PixelMaps.StoS.Size - 1;
-      GLuint i;
-      for (i = 0; i < n; i++) {
-         stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
-      }
-   }
-}
-
-
-/**
- * Used to pack an array [][4] of RGBA float colors as specified
- * by the dstFormat, dstType and dstPacking.  Used by glReadPixels,
- * glGetConvolutionFilter(), etc.
- * Note: the rgba values will be modified by this function when any pixel
- * transfer ops are enabled.
- */
-void
-_mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4],
-                           GLenum dstFormat, GLenum dstType,
-                           GLvoid *dstAddr,
-                           const struct gl_pixelstore_attrib *dstPacking,
-                           GLbitfield transferOps)
-{
-   GLfloat luminance[MAX_WIDTH];
-   const GLint comps = _mesa_components_in_format(dstFormat);
-   GLuint i;
-
-   /* XXX
-    * This test should probably go away.  Have the caller set/clear the
-    * IMAGE_CLAMP_BIT as needed.
-    */
-   if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
-      /* need to clamp to [0, 1] */
-      transferOps |= IMAGE_CLAMP_BIT;
-   }
-
-   if (transferOps) {
-      _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
-      if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) {
-         return;
-      }
-   }
-
-   if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
-      /* compute luminance values */
-      if (transferOps & IMAGE_CLAMP_BIT) {
-         for (i = 0; i < n; i++) {
-            GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
-            luminance[i] = CLAMP(sum, 0.0F, 1.0F);
-         }
-      }
-      else {
-         for (i = 0; i < n; i++) {
-            luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
-         }
-      }
-   }
-
-   /*
-    * Pack/store the pixels.  Ugh!  Lots of cases!!!
-    */
-   switch (dstType) {
-      case GL_UNSIGNED_BYTE:
-         {
-            GLubyte *dst = (GLubyte *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UBYTE(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
-                     dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                     dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                     dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                     dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                     dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
-                     dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_BYTE:
-         {
-            GLbyte *dst = (GLbyte *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_BYTE(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
-                     dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                     dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                     dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
-                  }
-		  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
-                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
-                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT:
-         {
-            GLushort *dst = (GLushort *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
-                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_SHORT:
-         {
-            GLshort *dst = (GLshort *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_SHORT(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
-                     dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                     dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                     dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
-                  }
-		  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
-                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
-                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT:
-         {
-            GLuint *dst = (GLuint *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_UINT(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
-                     dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                     dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                     dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
-                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
-                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_INT:
-         {
-            GLint *dst = (GLint *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = FLOAT_TO_INT(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
-                     dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                     dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                     dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                     dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                     dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                     dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                     dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                     dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                     dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
-                     dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
-                     dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                     dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
-                     dst[i*2+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_FLOAT:
-         {
-            GLfloat *dst = (GLfloat *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = rgba[i][RCOMP];
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = rgba[i][GCOMP];
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = rgba[i][BCOMP];
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = rgba[i][ACOMP];
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = luminance[i];
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = luminance[i];
-                     dst[i*2+1] = rgba[i][ACOMP];
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = rgba[i][RCOMP];
-                     dst[i*3+1] = rgba[i][GCOMP];
-                     dst[i*3+2] = rgba[i][BCOMP];
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = rgba[i][RCOMP];
-                     dst[i*4+1] = rgba[i][GCOMP];
-                     dst[i*4+2] = rgba[i][BCOMP];
-                     dst[i*4+3] = rgba[i][ACOMP];
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = rgba[i][BCOMP];
-                     dst[i*3+1] = rgba[i][GCOMP];
-                     dst[i*3+2] = rgba[i][RCOMP];
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = rgba[i][BCOMP];
-                     dst[i*4+1] = rgba[i][GCOMP];
-                     dst[i*4+2] = rgba[i][RCOMP];
-                     dst[i*4+3] = rgba[i][ACOMP];
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = rgba[i][ACOMP];
-                     dst[i*4+1] = rgba[i][BCOMP];
-                     dst[i*4+2] = rgba[i][GCOMP];
-                     dst[i*4+3] = rgba[i][RCOMP];
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = rgba[i][RCOMP];
-                     dst[i*2+1] = rgba[i][GCOMP];
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_HALF_FLOAT_ARB:
-         {
-            GLhalfARB *dst = (GLhalfARB *) dstAddr;
-            switch (dstFormat) {
-               case GL_RED:
-                  for (i=0;i<n;i++)
-                     dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
-                  break;
-               case GL_GREEN:
-                  for (i=0;i<n;i++)
-                     dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
-                  break;
-               case GL_BLUE:
-                  for (i=0;i<n;i++)
-                     dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
-                  break;
-               case GL_ALPHA:
-                  for (i=0;i<n;i++)
-                     dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
-                  break;
-               case GL_LUMINANCE:
-                  for (i=0;i<n;i++)
-                     dst[i] = _mesa_float_to_half(luminance[i]);
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = _mesa_float_to_half(luminance[i]);
-                     dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_RGB:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
-                     dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
-                     dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
-                  }
-                  break;
-               case GL_RGBA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
-                     dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
-                     dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
-                     dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_BGR:
-                  for (i=0;i<n;i++) {
-                     dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
-                     dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
-                     dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_BGRA:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
-                     dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
-                     dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
-                     dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
-                  }
-                  break;
-               case GL_ABGR_EXT:
-                  for (i=0;i<n;i++) {
-                     dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
-                     dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
-                     dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
-                     dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
-                  }
-                  break;
-               case GL_DUDV_ATI:
-               case GL_DU8DV8_ATI:
-                  for (i=0;i<n;i++) {
-                     dst[i*2+0] = _mesa_float_to_half(rgba[i][RCOMP]);
-                     dst[i*2+1] = _mesa_float_to_half(rgba[i][GCOMP]);
-                  }
-                  break;
-               default:
-                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
-            }
-         }
-         break;
-      case GL_UNSIGNED_BYTE_3_3_2:
-         if (dstFormat == GL_RGB) {
-            GLubyte *dst = (GLubyte *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) << 5)
-                      | (IROUND(rgba[i][GCOMP] * 7.0F) << 2)
-                      | (IROUND(rgba[i][BCOMP] * 3.0F)     );
-            }
-         }
-         break;
-      case GL_UNSIGNED_BYTE_2_3_3_REV:
-         if (dstFormat == GL_RGB) {
-            GLubyte *dst = (GLubyte *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F)     )
-                      | (IROUND(rgba[i][GCOMP] * 7.0F) << 3)
-                      | (IROUND(rgba[i][BCOMP] * 3.0F) << 6);
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_6_5:
-         if (dstFormat == GL_RGB) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
-                      | (IROUND(rgba[i][GCOMP] * 63.0F) <<  5)
-                      | (IROUND(rgba[i][BCOMP] * 31.0F)      );
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_6_5_REV:
-         if (dstFormat == GL_RGB) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 63.0F) <<  5)
-                      | (IROUND(rgba[i][BCOMP] * 31.0F) << 11);
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_4_4_4_4:
-         if (dstFormat == GL_RGBA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) << 12)
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][BCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][ACOMP] * 15.0F)      );
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) << 12)
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][RCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][ACOMP] * 15.0F)      );
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) << 12)
-                      | (IROUND(rgba[i][BCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][RCOMP] * 15.0F)      );
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-         if (dstFormat == GL_RGBA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][BCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][RCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F)      )
-                      | (IROUND(rgba[i][BCOMP] * 15.0F) <<  4)
-                      | (IROUND(rgba[i][GCOMP] * 15.0F) <<  8)
-                      | (IROUND(rgba[i][RCOMP] * 15.0F) << 12);
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_5_5_1:
-         if (dstFormat == GL_RGBA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) <<  6)
-                      | (IROUND(rgba[i][BCOMP] * 31.0F) <<  1)
-                      | (IROUND(rgba[i][ACOMP] *  1.0F)      );
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) << 11)
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) <<  6)
-                      | (IROUND(rgba[i][RCOMP] * 31.0F) <<  1)
-                      | (IROUND(rgba[i][ACOMP] *  1.0F)      );
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) << 11)
-                      | (IROUND(rgba[i][BCOMP] * 31.0F) <<  6)
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) <<  1)
-                      | (IROUND(rgba[i][RCOMP] *  1.0F)      );
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-         if (dstFormat == GL_RGBA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) <<  5)
-                      | (IROUND(rgba[i][BCOMP] * 31.0F) << 10)
-                      | (IROUND(rgba[i][ACOMP] *  1.0F) << 15);
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) <<  5)
-                      | (IROUND(rgba[i][RCOMP] * 31.0F) << 10)
-                      | (IROUND(rgba[i][ACOMP] *  1.0F) << 15);
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLushort *dst = (GLushort *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F)      )
-                      | (IROUND(rgba[i][BCOMP] * 31.0F) <<  5)
-                      | (IROUND(rgba[i][GCOMP] * 31.0F) << 10)
-                      | (IROUND(rgba[i][RCOMP] *  1.0F) << 15);
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_8_8_8_8:
-         if (dstFormat == GL_RGBA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 255.F) << 24)
-                      | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
-                      | (IROUND(rgba[i][BCOMP] * 255.F) <<  8)
-                      | (IROUND(rgba[i][ACOMP] * 255.F)      );
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 255.F) << 24)
-                      | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
-                      | (IROUND(rgba[i][RCOMP] * 255.F) <<  8)
-                      | (IROUND(rgba[i][ACOMP] * 255.F)      );
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 255.F) << 24)
-                      | (IROUND(rgba[i][BCOMP] * 255.F) << 16)
-                      | (IROUND(rgba[i][GCOMP] * 255.F) <<  8)
-                      | (IROUND(rgba[i][RCOMP] * 255.F)      );
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_8_8_8_8_REV:
-         if (dstFormat == GL_RGBA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 255.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 255.0F) <<  8)
-                      | (IROUND(rgba[i][BCOMP] * 255.0F) << 16)
-                      | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 255.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 255.0F) <<  8)
-                      | (IROUND(rgba[i][RCOMP] * 255.0F) << 16)
-                      | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 255.0F)      )
-                      | (IROUND(rgba[i][BCOMP] * 255.0F) <<  8)
-                      | (IROUND(rgba[i][GCOMP] * 255.0F) << 16)
-                      | (IROUND(rgba[i][RCOMP] * 255.0F) << 24);
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_10_10_10_2:
-         if (dstFormat == GL_RGBA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) << 22)
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
-                      | (IROUND(rgba[i][BCOMP] * 1023.0F) <<  2)
-                      | (IROUND(rgba[i][ACOMP] *    3.0F)      );
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) << 22)
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
-                      | (IROUND(rgba[i][RCOMP] * 1023.0F) <<  2)
-                      | (IROUND(rgba[i][ACOMP] *    3.0F)      );
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) << 22)
-                      | (IROUND(rgba[i][BCOMP] * 1023.0F) << 12)
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) <<  2)
-                      | (IROUND(rgba[i][RCOMP] *    3.0F)      );
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_2_10_10_10_REV:
-         if (dstFormat == GL_RGBA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
-                      | (IROUND(rgba[i][BCOMP] * 1023.0F) << 20)
-                      | (IROUND(rgba[i][ACOMP] *    3.0F) << 30);
-            }
-         }
-         else if (dstFormat == GL_BGRA) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F)      )
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
-                      | (IROUND(rgba[i][RCOMP] * 1023.0F) << 20)
-                      | (IROUND(rgba[i][ACOMP] *    3.0F) << 30);
-            }
-         }
-         else if (dstFormat == GL_ABGR_EXT) {
-            GLuint *dst = (GLuint *) dstAddr;
-            for (i=0;i<n;i++) {
-               dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F)      )
-                      | (IROUND(rgba[i][BCOMP] * 1023.0F) << 10)
-                      | (IROUND(rgba[i][GCOMP] * 1023.0F) << 20)
-                      | (IROUND(rgba[i][RCOMP] *    3.0F) << 30);
-            }
-         }
-         break;
-      default:
-         _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float");
-         return;
-   }
-
-   if (dstPacking->SwapBytes) {
-      GLint swapSize = _mesa_sizeof_packed_type(dstType);
-      if (swapSize == 2) {
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2((GLushort *) dstAddr, n * comps);
-         }
-      }
-      else if (swapSize == 4) {
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4((GLuint *) dstAddr, n * comps);
-         }
-      }
-   }
-}
-
-
-#define SWAP2BYTE(VALUE)			\
-   {						\
-      GLubyte *bytes = (GLubyte *) &(VALUE);	\
-      GLubyte tmp = bytes[0];			\
-      bytes[0] = bytes[1];			\
-      bytes[1] = tmp;				\
-   }
-
-#define SWAP4BYTE(VALUE)			\
-   {						\
-      GLubyte *bytes = (GLubyte *) &(VALUE);	\
-      GLubyte tmp = bytes[0];			\
-      bytes[0] = bytes[3];			\
-      bytes[3] = tmp;				\
-      tmp = bytes[1];				\
-      bytes[1] = bytes[2];			\
-      bytes[2] = tmp;				\
-   }
-
-
-static void
-extract_uint_indexes(GLuint n, GLuint indexes[],
-                     GLenum srcFormat, GLenum srcType, const GLvoid *src,
-                     const struct gl_pixelstore_attrib *unpack )
-{
-   ASSERT(srcFormat == GL_COLOR_INDEX || srcFormat == GL_STENCIL_INDEX);
-
-   ASSERT(srcType == GL_BITMAP ||
-          srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_UNSIGNED_INT_24_8_EXT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT);
-
-   switch (srcType) {
-      case GL_BITMAP:
-         {
-            GLubyte *ubsrc = (GLubyte *) src;
-            if (unpack->LsbFirst) {
-               GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  indexes[i] = (*ubsrc & mask) ? 1 : 0;
-                  if (mask == 128) {
-                     mask = 1;
-                     ubsrc++;
-                  }
-                  else {
-                     mask = mask << 1;
-                  }
-               }
-            }
-            else {
-               GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  indexes[i] = (*ubsrc & mask) ? 1 : 0;
-                  if (mask == 1) {
-                     mask = 128;
-                     ubsrc++;
-                  }
-                  else {
-                     mask = mask >> 1;
-                  }
-               }
-            }
-         }
-         break;
-      case GL_UNSIGNED_BYTE:
-         {
-            GLuint i;
-            const GLubyte *s = (const GLubyte *) src;
-            for (i = 0; i < n; i++)
-               indexes[i] = s[i];
-         }
-         break;
-      case GL_BYTE:
-         {
-            GLuint i;
-            const GLbyte *s = (const GLbyte *) src;
-            for (i = 0; i < n; i++)
-               indexes[i] = s[i];
-         }
-         break;
-      case GL_UNSIGNED_SHORT:
-         {
-            GLuint i;
-            const GLushort *s = (const GLushort *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLushort value = s[i];
-                  SWAP2BYTE(value);
-                  indexes[i] = value;
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = s[i];
-            }
-         }
-         break;
-      case GL_SHORT:
-         {
-            GLuint i;
-            const GLshort *s = (const GLshort *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLshort value = s[i];
-                  SWAP2BYTE(value);
-                  indexes[i] = value;
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = s[i];
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT:
-         {
-            GLuint i;
-            const GLuint *s = (const GLuint *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLuint value = s[i];
-                  SWAP4BYTE(value);
-                  indexes[i] = value;
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = s[i];
-            }
-         }
-         break;
-      case GL_INT:
-         {
-            GLuint i;
-            const GLint *s = (const GLint *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLint value = s[i];
-                  SWAP4BYTE(value);
-                  indexes[i] = value;
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = s[i];
-            }
-         }
-         break;
-      case GL_FLOAT:
-         {
-            GLuint i;
-            const GLfloat *s = (const GLfloat *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLfloat value = s[i];
-                  SWAP4BYTE(value);
-                  indexes[i] = (GLuint) value;
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = (GLuint) s[i];
-            }
-         }
-         break;
-      case GL_HALF_FLOAT_ARB:
-         {
-            GLuint i;
-            const GLhalfARB *s = (const GLhalfARB *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLhalfARB value = s[i];
-                  SWAP2BYTE(value);
-                  indexes[i] = (GLuint) _mesa_half_to_float(value);
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = (GLuint) _mesa_half_to_float(s[i]);
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_24_8_EXT:
-         {
-            GLuint i;
-            const GLuint *s = (const GLuint *) src;
-            if (unpack->SwapBytes) {
-               for (i = 0; i < n; i++) {
-                  GLuint value = s[i];
-                  SWAP4BYTE(value);
-                  indexes[i] = value & 0xff;  /* lower 8 bits */
-               }
-            }
-            else {
-               for (i = 0; i < n; i++)
-                  indexes[i] = s[i] & 0xff;  /* lower 8 bits */
-            }
-         }
-         break;
-
-      default:
-         _mesa_problem(NULL, "bad srcType in extract_uint_indexes");
-         return;
-   }
-}
-
-
-/*
- * This function extracts floating point RGBA values from arbitrary
- * image data.  srcFormat and srcType are the format and type parameters
- * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
- *
- * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
- * implements the "Conversion to floating point", "Conversion to RGB",
- * and "Final Expansion to RGBA" operations.
- *
- * Args:  n - number of pixels
- *        rgba - output colors
- *        srcFormat - format of incoming data
- *        srcType - data type of incoming data
- *        src - source data pointer
- *        swapBytes - perform byteswapping of incoming data?
- */
-static void
-extract_float_rgba(GLuint n, GLfloat rgba[][4],
-                   GLenum srcFormat, GLenum srcType, const GLvoid *src,
-                   GLboolean swapBytes)
-{
-   GLint redIndex, greenIndex, blueIndex, alphaIndex;
-   GLint stride;
-   GLint rComp, bComp, gComp, aComp;
-   GLboolean intFormat;
-   GLfloat rs = 1.0f, gs = 1.0f, bs = 1.0f, as = 1.0f; /* scale factors */
-
-   ASSERT(srcFormat == GL_RED ||
-          srcFormat == GL_GREEN ||
-          srcFormat == GL_BLUE ||
-          srcFormat == GL_ALPHA ||
-          srcFormat == GL_LUMINANCE ||
-          srcFormat == GL_LUMINANCE_ALPHA ||
-          srcFormat == GL_INTENSITY ||
-          srcFormat == GL_RGB ||
-          srcFormat == GL_BGR ||
-          srcFormat == GL_RGBA ||
-          srcFormat == GL_BGRA ||
-          srcFormat == GL_ABGR_EXT ||
-          srcFormat == GL_DU8DV8_ATI ||
-          srcFormat == GL_DUDV_ATI ||
-          srcFormat == GL_RED_INTEGER_EXT ||
-          srcFormat == GL_GREEN_INTEGER_EXT ||
-          srcFormat == GL_BLUE_INTEGER_EXT ||
-          srcFormat == GL_ALPHA_INTEGER_EXT ||
-          srcFormat == GL_RGB_INTEGER_EXT ||
-          srcFormat == GL_RGBA_INTEGER_EXT ||
-          srcFormat == GL_BGR_INTEGER_EXT ||
-          srcFormat == GL_BGRA_INTEGER_EXT ||
-          srcFormat == GL_LUMINANCE_INTEGER_EXT ||
-          srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT);
-
-   ASSERT(srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT ||
-          srcType == GL_UNSIGNED_BYTE_3_3_2 ||
-          srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5 ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
-          srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8 ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
-          srcType == GL_UNSIGNED_INT_10_10_10_2 ||
-          srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
-   rComp = gComp = bComp = aComp = -1;
-
-   switch (srcFormat) {
-      case GL_RED:
-      case GL_RED_INTEGER_EXT:
-         redIndex = 0;
-         greenIndex = blueIndex = alphaIndex = -1;
-         stride = 1;
-         break;
-      case GL_GREEN:
-      case GL_GREEN_INTEGER_EXT:
-         greenIndex = 0;
-         redIndex = blueIndex = alphaIndex = -1;
-         stride = 1;
-         break;
-      case GL_BLUE:
-      case GL_BLUE_INTEGER_EXT:
-         blueIndex = 0;
-         redIndex = greenIndex = alphaIndex = -1;
-         stride = 1;
-         break;
-      case GL_ALPHA:
-      case GL_ALPHA_INTEGER_EXT:
-         redIndex = greenIndex = blueIndex = -1;
-         alphaIndex = 0;
-         stride = 1;
-         break;
-      case GL_LUMINANCE:
-      case GL_LUMINANCE_INTEGER_EXT:
-         redIndex = greenIndex = blueIndex = 0;
-         alphaIndex = -1;
-         stride = 1;
-         break;
-      case GL_LUMINANCE_ALPHA:
-      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-         redIndex = greenIndex = blueIndex = 0;
-         alphaIndex = 1;
-         stride = 2;
-         break;
-      case GL_INTENSITY:
-         redIndex = greenIndex = blueIndex = alphaIndex = 0;
-         stride = 1;
-         break;
-      case GL_RGB:
-      case GL_RGB_INTEGER:
-         redIndex = 0;
-         greenIndex = 1;
-         blueIndex = 2;
-         alphaIndex = -1;
-         rComp = 0;
-         gComp = 1;
-         bComp = 2;
-         aComp = 3;
-         stride = 3;
-         break;
-      case GL_BGR:
-         redIndex = 2;
-         greenIndex = 1;
-         blueIndex = 0;
-         alphaIndex = -1;
-         rComp = 2;
-         gComp = 1;
-         bComp = 0;
-         aComp = 3;
-         stride = 3;
-         break;
-      case GL_RGBA:
-      case GL_RGBA_INTEGER:
-         redIndex = 0;
-         greenIndex = 1;
-         blueIndex = 2;
-         alphaIndex = 3;
-         rComp = 0;
-         gComp = 1;
-         bComp = 2;
-         aComp = 3;
-         stride = 4;
-         break;
-      case GL_BGRA:
-         redIndex = 2;
-         greenIndex = 1;
-         blueIndex = 0;
-         alphaIndex = 3;
-         rComp = 2;
-         gComp = 1;
-         bComp = 0;
-         aComp = 3;
-         stride = 4;
-         break;
-      case GL_ABGR_EXT:
-         redIndex = 3;
-         greenIndex = 2;
-         blueIndex = 1;
-         alphaIndex = 0;
-         rComp = 3;
-         gComp = 2;
-         bComp = 1;
-         aComp = 0;
-         stride = 4;
-         break;
-      case GL_DU8DV8_ATI:
-      case GL_DUDV_ATI:
-         redIndex = 0;
-         greenIndex = 1;
-         blueIndex = -1;
-         alphaIndex = -1;
-         stride = 2;
-         break;
-      default:
-         _mesa_problem(NULL, "bad srcFormat %s in extract float data",
-                       _mesa_lookup_enum_by_nr(srcFormat));
-         return;
-   }
-
-   intFormat = _mesa_is_integer_format(srcFormat);
-
-#define PROCESS(INDEX, CHANNEL, DEFAULT, DEFAULT_INT, TYPE, CONVERSION) \
-   if ((INDEX) < 0) {							\
-      GLuint i;								\
-      if (intFormat) {							\
-         for (i = 0; i < n; i++) {					\
-            rgba[i][CHANNEL] = DEFAULT_INT;				\
-         }								\
-      }									\
-      else {								\
-         for (i = 0; i < n; i++) {					\
-            rgba[i][CHANNEL] = DEFAULT;					\
-         }								\
-      }									\
-   }									\
-   else if (swapBytes) {						\
-      const TYPE *s = (const TYPE *) src;				\
-      GLuint i;								\
-      for (i = 0; i < n; i++) {						\
-         TYPE value = s[INDEX];						\
-         if (sizeof(TYPE) == 2) {					\
-            SWAP2BYTE(value);						\
-         }								\
-         else if (sizeof(TYPE) == 4) {					\
-            SWAP4BYTE(value);						\
-         }								\
-         if (intFormat)							\
-            rgba[i][CHANNEL] = (GLfloat) value;				\
-         else								\
-            rgba[i][CHANNEL] = (GLfloat) CONVERSION(value);		\
-         s += stride;							\
-      }									\
-   }									\
-   else {								\
-      const TYPE *s = (const TYPE *) src;				\
-      GLuint i;								\
-      if (intFormat) {							\
-         for (i = 0; i < n; i++) {					\
-            rgba[i][CHANNEL] = (GLfloat) s[INDEX];			\
-            s += stride;						\
-         }								\
-      }									\
-      else {								\
-         for (i = 0; i < n; i++) {					\
-            rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]);		\
-            s += stride;						\
-         }								\
-      }									\
-   }
-
-   switch (srcType) {
-      case GL_UNSIGNED_BYTE:
-         PROCESS(redIndex,   RCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 255, GLubyte, UBYTE_TO_FLOAT);
-         break;
-      case GL_BYTE:
-         PROCESS(redIndex,   RCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 127, GLbyte, BYTE_TO_FLOAT);
-         break;
-      case GL_UNSIGNED_SHORT:
-         PROCESS(redIndex,   RCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 0xffff, GLushort, USHORT_TO_FLOAT);
-         break;
-      case GL_SHORT:
-         PROCESS(redIndex,   RCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 32767, GLshort, SHORT_TO_FLOAT);
-         break;
-      case GL_UNSIGNED_INT:
-         PROCESS(redIndex,   RCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 0xffffffff, GLuint, UINT_TO_FLOAT);
-         break;
-      case GL_INT:
-         PROCESS(redIndex,   RCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 2147483647, GLint, INT_TO_FLOAT);
-         break;
-      case GL_FLOAT:
-         PROCESS(redIndex,   RCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
-         PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
-         PROCESS(blueIndex,  BCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
-         PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLfloat, (GLfloat));
-         break;
-      case GL_HALF_FLOAT_ARB:
-         PROCESS(redIndex,   RCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(blueIndex,  BCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLhalfARB, _mesa_half_to_float);
-         break;
-      case GL_UNSIGNED_BYTE_3_3_2:
-         {
-            const GLubyte *ubsrc = (const GLubyte *) src;
-            GLuint i;
-            if (!intFormat) {
-               rs = 1.0F / 7.0F;
-               gs = 1.0F / 7.0F;
-               bs = 1.0F / 3.0F;
-            }
-            for (i = 0; i < n; i ++) {
-               GLubyte p = ubsrc[i];
-               rgba[i][rComp] = ((p >> 5)      ) * rs;
-               rgba[i][gComp] = ((p >> 2) & 0x7) * gs;
-               rgba[i][bComp] = ((p     ) & 0x3) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         break;
-      case GL_UNSIGNED_BYTE_2_3_3_REV:
-         {
-            const GLubyte *ubsrc = (const GLubyte *) src;
-            GLuint i;
-            if (!intFormat) {
-               rs = 1.0F / 7.0F;
-               gs = 1.0F / 7.0F;
-               bs = 1.0F / 3.0F;
-            }
-            for (i = 0; i < n; i ++) {
-               GLubyte p = ubsrc[i];
-               rgba[i][rComp] = ((p     ) & 0x7) * rs;
-               rgba[i][gComp] = ((p >> 3) & 0x7) * gs;
-               rgba[i][bComp] = ((p >> 6)      ) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_6_5:
-         if (!intFormat) {
-            rs = 1.0F / 31.0F;
-            gs = 1.0F / 63.0F;
-            bs = 1.0F / 31.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 11)       ) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
-               rgba[i][bComp] = ((p      ) & 0x1f) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 11)       ) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
-               rgba[i][bComp] = ((p      ) & 0x1f) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_6_5_REV:
-         if (!intFormat) {
-            rs = 1.0F / 31.0F;
-            gs = 1.0F / 63.0F;
-            bs = 1.0F / 31.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
-               rgba[i][bComp] = ((p >> 11)       ) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
-               rgba[i][bComp] = ((p >> 11)       ) * bs;
-               rgba[i][aComp] = 1.0F;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_4_4_4_4:
-         if (!intFormat) {
-            rs = gs = bs = as = 1.0F / 15.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 12)      ) * rs;
-               rgba[i][gComp] = ((p >>  8) & 0xf) * gs;
-               rgba[i][bComp] = ((p >>  4) & 0xf) * bs;
-               rgba[i][aComp] = ((p      ) & 0xf) * as;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 12)      ) * rs;
-               rgba[i][gComp] = ((p >>  8) & 0xf) * gs;
-               rgba[i][bComp] = ((p >>  4) & 0xf) * bs;
-               rgba[i][aComp] = ((p      ) & 0xf) * as;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
-         if (!intFormat) {
-            rs = gs = bs = as = 1.0F / 15.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0xf) * rs;
-               rgba[i][gComp] = ((p >>  4) & 0xf) * gs;
-               rgba[i][bComp] = ((p >>  8) & 0xf) * bs;
-               rgba[i][aComp] = ((p >> 12)      ) * as;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0xf) * rs;
-               rgba[i][gComp] = ((p >>  4) & 0xf) * gs;
-               rgba[i][bComp] = ((p >>  8) & 0xf) * bs;
-               rgba[i][aComp] = ((p >> 12)      ) * as;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_5_5_5_1:
-         if (!intFormat) {
-            rs = gs = bs = 1.0F / 31.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 11)       ) * rs;
-               rgba[i][gComp] = ((p >>  6) & 0x1f) * gs;
-               rgba[i][bComp] = ((p >>  1) & 0x1f) * bs;
-               rgba[i][aComp] = ((p      ) & 0x1)  * as;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 11)       ) * rs;
-               rgba[i][gComp] = ((p >>  6) & 0x1f) * gs;
-               rgba[i][bComp] = ((p >>  1) & 0x1f) * bs;
-               rgba[i][aComp] = ((p      ) & 0x1)  * as;
-            }
-         }
-         break;
-      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
-         if (!intFormat) {
-            rs = gs = bs = 1.0F / 31.0F;
-         }
-         if (swapBytes) {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x1f) * gs;
-               rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
-               rgba[i][aComp] = ((p >> 15)       ) * as;
-            }
-         }
-         else {
-            const GLushort *ussrc = (const GLushort *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
-               rgba[i][gComp] = ((p >>  5) & 0x1f) * gs;
-               rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
-               rgba[i][aComp] = ((p >> 15)       ) * as;
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_8_8_8_8:
-         if (swapBytes) {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            if (intFormat) {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = (GLfloat) ((p      ) & 0xff);
-                  rgba[i][gComp] = (GLfloat) ((p >>  8) & 0xff);
-                  rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
-                  rgba[i][aComp] = (GLfloat) ((p >> 24)       );
-               }
-            }
-            else {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-                  rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
-               }
-            }
-         }
-         else {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            if (intFormat) {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = (GLfloat) ((p >> 24)       );
-                  rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
-                  rgba[i][bComp] = (GLfloat) ((p >>  8) & 0xff);
-                  rgba[i][aComp] = (GLfloat) ((p      ) & 0xff);
-               }
-            }
-            else {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
-                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-                  rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-               }
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_8_8_8_8_REV:
-         if (swapBytes) {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            if (intFormat) {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = (GLfloat) ((p >> 24)       );
-                  rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
-                  rgba[i][bComp] = (GLfloat) ((p >>  8) & 0xff);
-                  rgba[i][aComp] = (GLfloat) ((p      ) & 0xff);
-               }
-            }
-            else {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
-                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-                  rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-               }
-            }
-         }
-         else {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            if (intFormat) {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = (GLfloat) ((p      ) & 0xff);
-                  rgba[i][gComp] = (GLfloat) ((p >>  8) & 0xff);
-                  rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
-                  rgba[i][aComp] = (GLfloat) ((p >> 24)       );
-               }
-            }
-            else {
-               for (i = 0; i < n; i ++) {
-                  GLuint p = uisrc[i];
-                  rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-                  rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
-               }
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_10_10_10_2:
-         if (!intFormat) {
-            rs = 1.0F / 1023.0F;
-            gs = 1.0F / 1023.0F;
-            bs = 1.0F / 1023.0F;
-            as = 1.0F / 3.0F;
-         }
-         if (swapBytes) {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               SWAP4BYTE(p);
-               rgba[i][rComp] = ((p >> 22)        ) * rs;
-               rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
-               rgba[i][bComp] = ((p >>  2) & 0x3ff) * bs;
-               rgba[i][aComp] = ((p      ) & 0x3  ) * as;
-            }
-         }
-         else {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = ((p >> 22)        ) * rs;
-               rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
-               rgba[i][bComp] = ((p >>  2) & 0x3ff) * bs;
-               rgba[i][aComp] = ((p      ) & 0x3  ) * as;
-            }
-         }
-         break;
-      case GL_UNSIGNED_INT_2_10_10_10_REV:
-         if (!intFormat) {
-            rs = 1.0F / 1023.0F;
-            gs = 1.0F / 1023.0F;
-            bs = 1.0F / 1023.0F;
-            as = 1.0F / 3.0F;
-         }
-         if (swapBytes) {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               SWAP4BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x3ff) * rs;
-               rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
-               rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
-               rgba[i][aComp] = ((p >> 30)        ) * as;
-            }
-         }
-         else {
-            const GLuint *uisrc = (const GLuint *) src;
-            GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = ((p      ) & 0x3ff) * rs;
-               rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
-               rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
-               rgba[i][aComp] = ((p >> 30)        ) * as;
-            }
-         }
-         break;
-      default:
-         _mesa_problem(NULL, "bad srcType in extract float data");
-         break;
-   }
-}
-
-
-/*
- * Unpack a row of color image data from a client buffer according to
- * the pixel unpacking parameters.
- * Return GLchan values in the specified dest image format.
- * This is used by glDrawPixels and glTexImage?D().
- * \param ctx - the context
- *         n - number of pixels in the span
- *         dstFormat - format of destination color array
- *         dest - the destination color array
- *         srcFormat - source image format
- *         srcType - source image  data type
- *         source - source image pointer
- *         srcPacking - pixel unpacking parameters
- *         transferOps - bitmask of IMAGE_*_BIT values of operations to apply
- *
- * XXX perhaps expand this to process whole images someday.
- */
-void
-_mesa_unpack_color_span_chan( GLcontext *ctx,
-                              GLuint n, GLenum dstFormat, GLchan dest[],
-                              GLenum srcFormat, GLenum srcType,
-                              const GLvoid *source,
-                              const struct gl_pixelstore_attrib *srcPacking,
-                              GLbitfield transferOps )
-{
-   ASSERT(dstFormat == GL_ALPHA ||
-          dstFormat == GL_LUMINANCE ||
-          dstFormat == GL_LUMINANCE_ALPHA ||
-          dstFormat == GL_INTENSITY ||
-          dstFormat == GL_RGB ||
-          dstFormat == GL_RGBA ||
-          dstFormat == GL_COLOR_INDEX);
-
-   ASSERT(srcFormat == GL_RED ||
-          srcFormat == GL_GREEN ||
-          srcFormat == GL_BLUE ||
-          srcFormat == GL_ALPHA ||
-          srcFormat == GL_LUMINANCE ||
-          srcFormat == GL_LUMINANCE_ALPHA ||
-          srcFormat == GL_INTENSITY ||
-          srcFormat == GL_RGB ||
-          srcFormat == GL_BGR ||
-          srcFormat == GL_RGBA ||
-          srcFormat == GL_BGRA ||
-          srcFormat == GL_ABGR_EXT ||
-          srcFormat == GL_COLOR_INDEX);
-
-   ASSERT(srcType == GL_BITMAP ||
-          srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT ||
-          srcType == GL_UNSIGNED_BYTE_3_3_2 ||
-          srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5 ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
-          srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8 ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
-          srcType == GL_UNSIGNED_INT_10_10_10_2 ||
-          srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
-   /* Try simple cases first */
-   if (transferOps == 0) {
-      if (srcType == CHAN_TYPE) {
-         if (dstFormat == GL_RGBA) {
-            if (srcFormat == GL_RGBA) {
-               memcpy( dest, source, n * 4 * sizeof(GLchan) );
-               return;
-            }
-            else if (srcFormat == GL_RGB) {
-               GLuint i;
-               const GLchan *src = (const GLchan *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = src[0];
-                  dst[1] = src[1];
-                  dst[2] = src[2];
-                  dst[3] = CHAN_MAX;
-                  src += 3;
-                  dst += 4;
-               }
-               return;
-            }
-         }
-         else if (dstFormat == GL_RGB) {
-            if (srcFormat == GL_RGB) {
-               memcpy( dest, source, n * 3 * sizeof(GLchan) );
-               return;
-            }
-            else if (srcFormat == GL_RGBA) {
-               GLuint i;
-               const GLchan *src = (const GLchan *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = src[0];
-                  dst[1] = src[1];
-                  dst[2] = src[2];
-                  src += 4;
-                  dst += 3;
-               }
-               return;
-            }
-         }
-         else if (dstFormat == srcFormat) {
-            GLint comps = _mesa_components_in_format(srcFormat);
-            assert(comps > 0);
-            memcpy( dest, source, n * comps * sizeof(GLchan) );
-            return;
-         }
-      }
-      /*
-       * Common situation, loading 8bit RGBA/RGB source images
-       * into 16/32 bit destination. (OSMesa16/32)
-       */
-      else if (srcType == GL_UNSIGNED_BYTE) {
-         if (dstFormat == GL_RGBA) {
-            if (srcFormat == GL_RGB) {
-               GLuint i;
-               const GLubyte *src = (const GLubyte *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = UBYTE_TO_CHAN(src[0]);
-                  dst[1] = UBYTE_TO_CHAN(src[1]);
-                  dst[2] = UBYTE_TO_CHAN(src[2]);
-                  dst[3] = CHAN_MAX;
-                  src += 3;
-                  dst += 4;
-               }
-               return;
-            }
-            else if (srcFormat == GL_RGBA) {
-               GLuint i;
-               const GLubyte *src = (const GLubyte *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = UBYTE_TO_CHAN(src[0]);
-                  dst[1] = UBYTE_TO_CHAN(src[1]);
-                  dst[2] = UBYTE_TO_CHAN(src[2]);
-                  dst[3] = UBYTE_TO_CHAN(src[3]);
-                  src += 4;
-                  dst += 4;
-               }
-               return;
-             }
-         }
-         else if (dstFormat == GL_RGB) {
-            if (srcFormat == GL_RGB) {
-               GLuint i;
-               const GLubyte *src = (const GLubyte *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = UBYTE_TO_CHAN(src[0]);
-                  dst[1] = UBYTE_TO_CHAN(src[1]);
-                  dst[2] = UBYTE_TO_CHAN(src[2]);
-                  src += 3;
-                  dst += 3;
-               }
-               return;
-            }
-            else if (srcFormat == GL_RGBA) {
-               GLuint i;
-               const GLubyte *src = (const GLubyte *) source;
-               GLchan *dst = dest;
-               for (i = 0; i < n; i++) {
-                  dst[0] = UBYTE_TO_CHAN(src[0]);
-                  dst[1] = UBYTE_TO_CHAN(src[1]);
-                  dst[2] = UBYTE_TO_CHAN(src[2]);
-                  src += 4;
-                  dst += 3;
-               }
-               return;
-            }
-         }
-      }
-   }
-
-
-   /* general solution begins here */
-   {
-      GLint dstComponents;
-      GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
-      GLint dstLuminanceIndex, dstIntensityIndex;
-      GLfloat rgba[MAX_WIDTH][4];
-
-      dstComponents = _mesa_components_in_format( dstFormat );
-      /* source & dest image formats should have been error checked by now */
-      assert(dstComponents > 0);
-
-      /*
-       * Extract image data and convert to RGBA floats
-       */
-      assert(n <= MAX_WIDTH);
-      if (srcFormat == GL_COLOR_INDEX) {
-         GLuint indexes[MAX_WIDTH];
-         extract_uint_indexes(n, indexes, srcFormat, srcType, source,
-                              srcPacking);
-
-         if (dstFormat == GL_COLOR_INDEX) {
-            GLuint i;
-            _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
-            /* convert to GLchan and return */
-            for (i = 0; i < n; i++) {
-               dest[i] = (GLchan) (indexes[i] & 0xff);
-            }
-            return;
-         }
-         else {
-            /* Convert indexes to RGBA */
-            if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
-               shift_and_offset_ci(ctx, n, indexes);
-            }
-            _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
-         }
-
-         /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
-          * with color indexes.
-          */
-         transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
-      }
-      else {
-         /* non-color index data */
-         extract_float_rgba(n, rgba, srcFormat, srcType, source,
-                            srcPacking->SwapBytes);
-      }
-
-      /* Need to clamp if returning GLubytes or GLushorts */
-#if CHAN_TYPE != GL_FLOAT
-      transferOps |= IMAGE_CLAMP_BIT;
-#endif
-
-      if (transferOps) {
-         _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
-      }
-
-      /* Now determine which color channels we need to produce.
-       * And determine the dest index (offset) within each color tuple.
-       */
-      switch (dstFormat) {
-         case GL_ALPHA:
-            dstAlphaIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
-            dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         case GL_LUMINANCE:
-            dstLuminanceIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
-            dstIntensityIndex = -1;
-            break;
-         case GL_LUMINANCE_ALPHA:
-            dstLuminanceIndex = 0;
-            dstAlphaIndex = 1;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
-            dstIntensityIndex = -1;
-            break;
-         case GL_INTENSITY:
-            dstIntensityIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
-            dstLuminanceIndex = -1;
-            break;
-         case GL_RGB:
-            dstRedIndex = 0;
-            dstGreenIndex = 1;
-            dstBlueIndex = 2;
-            dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         case GL_RGBA:
-            dstRedIndex = 0;
-            dstGreenIndex = 1;
-            dstBlueIndex = 2;
-            dstAlphaIndex = 3;
-            dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         default:
-            _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
-            return;
-      }
-
-
-      /* Now return the GLchan data in the requested dstFormat */
-
-      if (dstRedIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            CLAMPED_FLOAT_TO_CHAN(dst[dstRedIndex], rgba[i][RCOMP]);
-            dst += dstComponents;
-         }
-      }
-
-      if (dstGreenIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            CLAMPED_FLOAT_TO_CHAN(dst[dstGreenIndex], rgba[i][GCOMP]);
-            dst += dstComponents;
-         }
-      }
-
-      if (dstBlueIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            CLAMPED_FLOAT_TO_CHAN(dst[dstBlueIndex], rgba[i][BCOMP]);
-            dst += dstComponents;
-         }
-      }
-
-      if (dstAlphaIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            CLAMPED_FLOAT_TO_CHAN(dst[dstAlphaIndex], rgba[i][ACOMP]);
-            dst += dstComponents;
-         }
-      }
-
-      if (dstIntensityIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         assert(dstIntensityIndex == 0);
-         assert(dstComponents == 1);
-         for (i = 0; i < n; i++) {
-            /* Intensity comes from red channel */
-            CLAMPED_FLOAT_TO_CHAN(dst[i], rgba[i][RCOMP]);
-         }
-      }
-
-      if (dstLuminanceIndex >= 0) {
-         GLchan *dst = dest;
-         GLuint i;
-         assert(dstLuminanceIndex == 0);
-         for (i = 0; i < n; i++) {
-            /* Luminance comes from red channel */
-            CLAMPED_FLOAT_TO_CHAN(dst[0], rgba[i][RCOMP]);
-            dst += dstComponents;
-         }
-      }
-   }
-}
-
-
-/**
- * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
- * instead of GLchan.
- */
-void
-_mesa_unpack_color_span_float( GLcontext *ctx,
-                               GLuint n, GLenum dstFormat, GLfloat dest[],
-                               GLenum srcFormat, GLenum srcType,
-                               const GLvoid *source,
-                               const struct gl_pixelstore_attrib *srcPacking,
-                               GLbitfield transferOps )
-{
-   ASSERT(dstFormat == GL_ALPHA ||
-          dstFormat == GL_LUMINANCE ||
-          dstFormat == GL_LUMINANCE_ALPHA ||
-          dstFormat == GL_INTENSITY ||
-          dstFormat == GL_RGB ||
-          dstFormat == GL_RGBA ||
-          dstFormat == GL_COLOR_INDEX);
-
-   ASSERT(srcFormat == GL_RED ||
-          srcFormat == GL_GREEN ||
-          srcFormat == GL_BLUE ||
-          srcFormat == GL_ALPHA ||
-          srcFormat == GL_LUMINANCE ||
-          srcFormat == GL_LUMINANCE_ALPHA ||
-          srcFormat == GL_INTENSITY ||
-          srcFormat == GL_RGB ||
-          srcFormat == GL_BGR ||
-          srcFormat == GL_RGBA ||
-          srcFormat == GL_BGRA ||
-          srcFormat == GL_ABGR_EXT ||
-          srcFormat == GL_RED_INTEGER_EXT ||
-          srcFormat == GL_GREEN_INTEGER_EXT ||
-          srcFormat == GL_BLUE_INTEGER_EXT ||
-          srcFormat == GL_ALPHA_INTEGER_EXT ||
-          srcFormat == GL_RGB_INTEGER_EXT ||
-          srcFormat == GL_RGBA_INTEGER_EXT ||
-          srcFormat == GL_BGR_INTEGER_EXT ||
-          srcFormat == GL_BGRA_INTEGER_EXT ||
-          srcFormat == GL_LUMINANCE_INTEGER_EXT ||
-          srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT ||
-          srcFormat == GL_COLOR_INDEX);
-
-   ASSERT(srcType == GL_BITMAP ||
-          srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT ||
-          srcType == GL_UNSIGNED_BYTE_3_3_2 ||
-          srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5 ||
-          srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
-          srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
-          srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
-          srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8 ||
-          srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
-          srcType == GL_UNSIGNED_INT_10_10_10_2 ||
-          srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
-   /* general solution, no special cases, yet */
-   {
-      GLint dstComponents;
-      GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
-      GLint dstLuminanceIndex, dstIntensityIndex;
-      GLfloat rgba[MAX_WIDTH][4];
-
-      dstComponents = _mesa_components_in_format( dstFormat );
-      /* source & dest image formats should have been error checked by now */
-      assert(dstComponents > 0);
-
-      /*
-       * Extract image data and convert to RGBA floats
-       */
-      assert(n <= MAX_WIDTH);
-      if (srcFormat == GL_COLOR_INDEX) {
-         GLuint indexes[MAX_WIDTH];
-         extract_uint_indexes(n, indexes, srcFormat, srcType, source,
-                              srcPacking);
-
-         if (dstFormat == GL_COLOR_INDEX) {
-            GLuint i;
-            _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
-            /* convert to GLchan and return */
-            for (i = 0; i < n; i++) {
-               dest[i] = (GLchan) (indexes[i] & 0xff);
-            }
-            return;
-         }
-         else {
-            /* Convert indexes to RGBA */
-            if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
-               shift_and_offset_ci(ctx, n, indexes);
-            }
-            _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
-         }
-
-         /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
-          * with color indexes.
-          */
-         transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
-      }
-      else {
-         /* non-color index data */
-         extract_float_rgba(n, rgba, srcFormat, srcType, source,
-                            srcPacking->SwapBytes);
-      }
-
-      if (transferOps) {
-         _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
-      }
-
-      /* Now determine which color channels we need to produce.
-       * And determine the dest index (offset) within each color tuple.
-       */
-      switch (dstFormat) {
-         case GL_ALPHA:
-            dstAlphaIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
-            dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         case GL_LUMINANCE:
-            dstLuminanceIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
-            dstIntensityIndex = -1;
-            break;
-         case GL_LUMINANCE_ALPHA:
-            dstLuminanceIndex = 0;
-            dstAlphaIndex = 1;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
-            dstIntensityIndex = -1;
-            break;
-         case GL_INTENSITY:
-            dstIntensityIndex = 0;
-            dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
-            dstLuminanceIndex = -1;
-            break;
-         case GL_RGB:
-            dstRedIndex = 0;
-            dstGreenIndex = 1;
-            dstBlueIndex = 2;
-            dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         case GL_RGBA:
-            dstRedIndex = 0;
-            dstGreenIndex = 1;
-            dstBlueIndex = 2;
-            dstAlphaIndex = 3;
-            dstLuminanceIndex = dstIntensityIndex = -1;
-            break;
-         default:
-            _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()");
-            return;
-      }
-
-      /* Now pack results in the requested dstFormat */
-      if (dstRedIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[dstRedIndex] = rgba[i][RCOMP];
-            dst += dstComponents;
-         }
-      }
-
-      if (dstGreenIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[dstGreenIndex] = rgba[i][GCOMP];
-            dst += dstComponents;
-         }
-      }
-
-      if (dstBlueIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[dstBlueIndex] = rgba[i][BCOMP];
-            dst += dstComponents;
-         }
-      }
-
-      if (dstAlphaIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[dstAlphaIndex] = rgba[i][ACOMP];
-            dst += dstComponents;
-         }
-      }
-
-      if (dstIntensityIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         assert(dstIntensityIndex == 0);
-         assert(dstComponents == 1);
-         for (i = 0; i < n; i++) {
-            /* Intensity comes from red channel */
-            dst[i] = rgba[i][RCOMP];
-         }
-      }
-
-      if (dstLuminanceIndex >= 0) {
-         GLfloat *dst = dest;
-         GLuint i;
-         assert(dstLuminanceIndex == 0);
-         for (i = 0; i < n; i++) {
-            /* Luminance comes from red channel */
-            dst[0] = rgba[i][RCOMP];
-            dst += dstComponents;
-         }
-      }
-   }
-}
-
-/**
- * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
- * directly return GLbyte data, no transfer ops apply.
- */
-void
-_mesa_unpack_dudv_span_byte( GLcontext *ctx,
-                             GLuint n, GLenum dstFormat, GLbyte dest[],
-                             GLenum srcFormat, GLenum srcType,
-                             const GLvoid *source,
-                             const struct gl_pixelstore_attrib *srcPacking,
-                             GLbitfield transferOps )
-{
-   ASSERT(dstFormat == GL_DUDV_ATI);
-   ASSERT(srcFormat == GL_DUDV_ATI);
-
-   ASSERT(srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT);
-
-   /* general solution */
-   {
-      GLint dstComponents;
-      GLfloat rgba[MAX_WIDTH][4];
-      GLbyte *dst = dest;
-      GLuint i;
-
-      dstComponents = _mesa_components_in_format( dstFormat );
-      /* source & dest image formats should have been error checked by now */
-      assert(dstComponents > 0);
-
-      /*
-       * Extract image data and convert to RGBA floats
-       */
-      assert(n <= MAX_WIDTH);
-      extract_float_rgba(n, rgba, srcFormat, srcType, source,
-                         srcPacking->SwapBytes);
-
-
-      /* Now determine which color channels we need to produce.
-       * And determine the dest index (offset) within each color tuple.
-       */
-
-      /* Now pack results in the requested dstFormat */
-      for (i = 0; i < n; i++) {
-         /* not sure - need clamp[-1,1] here? */
-         dst[0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
-         dst[1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
-         dst += dstComponents;
-      }
-   }
-}
-
-/*
- * Unpack a row of color index data from a client buffer according to
- * the pixel unpacking parameters.
- * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
- *
- * Args:  ctx - the context
- *        n - number of pixels
- *        dstType - destination data type
- *        dest - destination array
- *        srcType - source pixel type
- *        source - source data pointer
- *        srcPacking - pixel unpacking parameters
- *        transferOps - the pixel transfer operations to apply
- */
-void
-_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
-                         GLenum dstType, GLvoid *dest,
-                         GLenum srcType, const GLvoid *source,
-                         const struct gl_pixelstore_attrib *srcPacking,
-                         GLbitfield transferOps )
-{
-   ASSERT(srcType == GL_BITMAP ||
-          srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT);
-
-   ASSERT(dstType == GL_UNSIGNED_BYTE ||
-          dstType == GL_UNSIGNED_SHORT ||
-          dstType == GL_UNSIGNED_INT);
-
-
-   transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
-
-   /*
-    * Try simple cases first
-    */
-   if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
-       && dstType == GL_UNSIGNED_BYTE) {
-      memcpy(dest, source, n * sizeof(GLubyte));
-   }
-   else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
-            && dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
-      memcpy(dest, source, n * sizeof(GLuint));
-   }
-   else {
-      /*
-       * general solution
-       */
-      GLuint indexes[MAX_WIDTH];
-      assert(n <= MAX_WIDTH);
-
-      extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
-                           srcPacking);
-
-      if (transferOps)
-         _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
-
-      /* convert to dest type */
-      switch (dstType) {
-         case GL_UNSIGNED_BYTE:
-            {
-               GLubyte *dst = (GLubyte *) dest;
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  dst[i] = (GLubyte) (indexes[i] & 0xff);
-               }
-            }
-            break;
-         case GL_UNSIGNED_SHORT:
-            {
-               GLuint *dst = (GLuint *) dest;
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  dst[i] = (GLushort) (indexes[i] & 0xffff);
-               }
-            }
-            break;
-         case GL_UNSIGNED_INT:
-            memcpy(dest, indexes, n * sizeof(GLuint));
-            break;
-         default:
-            _mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
-      }
-   }
-}
-
-
-void
-_mesa_pack_index_span( const GLcontext *ctx, GLuint n,
-                       GLenum dstType, GLvoid *dest, const GLuint *source,
-                       const struct gl_pixelstore_attrib *dstPacking,
-                       GLbitfield transferOps )
-{
-   GLuint indexes[MAX_WIDTH];
-
-   ASSERT(n <= MAX_WIDTH);
-
-   transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
-
-   if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
-      /* make a copy of input */
-      memcpy(indexes, source, n * sizeof(GLuint));
-      _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
-      source = indexes;
-   }
-
-   switch (dstType) {
-   case GL_UNSIGNED_BYTE:
-      {
-         GLubyte *dst = (GLubyte *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            *dst++ = (GLubyte) source[i];
-         }
-      }
-      break;
-   case GL_BYTE:
-      {
-         GLbyte *dst = (GLbyte *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLbyte) source[i];
-         }
-      }
-      break;
-   case GL_UNSIGNED_SHORT:
-      {
-         GLushort *dst = (GLushort *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLushort) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_SHORT:
-      {
-         GLshort *dst = (GLshort *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLshort) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_UNSIGNED_INT:
-      {
-         GLuint *dst = (GLuint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLuint) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_INT:
-      {
-         GLint *dst = (GLint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLint) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_FLOAT:
-      {
-         GLfloat *dst = (GLfloat *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = (GLfloat) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_HALF_FLOAT_ARB:
-      {
-         GLhalfARB *dst = (GLhalfARB *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = _mesa_float_to_half((GLfloat) source[i]);
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   default:
-      _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
-   }
-}
-
-
-/*
- * Unpack a row of stencil data from a client buffer according to
- * the pixel unpacking parameters.
- * This is (or will be) used by glDrawPixels
- *
- * Args:  ctx - the context
- *        n - number of pixels
- *        dstType - destination data type
- *        dest - destination array
- *        srcType - source pixel type
- *        source - source data pointer
- *        srcPacking - pixel unpacking parameters
- *        transferOps - apply offset/bias/lookup ops?
- */
-void
-_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
-                           GLenum dstType, GLvoid *dest,
-                           GLenum srcType, const GLvoid *source,
-                           const struct gl_pixelstore_attrib *srcPacking,
-                           GLbitfield transferOps )
-{
-   ASSERT(srcType == GL_BITMAP ||
-          srcType == GL_UNSIGNED_BYTE ||
-          srcType == GL_BYTE ||
-          srcType == GL_UNSIGNED_SHORT ||
-          srcType == GL_SHORT ||
-          srcType == GL_UNSIGNED_INT ||
-          srcType == GL_INT ||
-          srcType == GL_UNSIGNED_INT_24_8_EXT ||
-          srcType == GL_HALF_FLOAT_ARB ||
-          srcType == GL_FLOAT);
-
-   ASSERT(dstType == GL_UNSIGNED_BYTE ||
-          dstType == GL_UNSIGNED_SHORT ||
-          dstType == GL_UNSIGNED_INT);
-
-   /* only shift and offset apply to stencil */
-   transferOps &= IMAGE_SHIFT_OFFSET_BIT;
-
-   /*
-    * Try simple cases first
-    */
-   if (transferOps == 0 &&
-       !ctx->Pixel.MapStencilFlag &&
-       srcType == GL_UNSIGNED_BYTE &&
-       dstType == GL_UNSIGNED_BYTE) {
-      memcpy(dest, source, n * sizeof(GLubyte));
-   }
-   else if (transferOps == 0 &&
-            !ctx->Pixel.MapStencilFlag &&
-            srcType == GL_UNSIGNED_INT &&
-            dstType == GL_UNSIGNED_INT &&
-            !srcPacking->SwapBytes) {
-      memcpy(dest, source, n * sizeof(GLuint));
-   }
-   else {
-      /*
-       * general solution
-       */
-      GLuint indexes[MAX_WIDTH];
-      assert(n <= MAX_WIDTH);
-
-      extract_uint_indexes(n, indexes, GL_STENCIL_INDEX, srcType, source,
-                           srcPacking);
-
-      if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
-         /* shift and offset indexes */
-         shift_and_offset_ci(ctx, n, indexes);
-      }
-
-      if (ctx->Pixel.MapStencilFlag) {
-         /* Apply stencil lookup table */
-         const GLuint mask = ctx->PixelMaps.StoS.Size - 1;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            indexes[i] = (GLuint)ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
-         }
-      }
-
-      /* convert to dest type */
-      switch (dstType) {
-         case GL_UNSIGNED_BYTE:
-            {
-               GLubyte *dst = (GLubyte *) dest;
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  dst[i] = (GLubyte) (indexes[i] & 0xff);
-               }
-            }
-            break;
-         case GL_UNSIGNED_SHORT:
-            {
-               GLuint *dst = (GLuint *) dest;
-               GLuint i;
-               for (i = 0; i < n; i++) {
-                  dst[i] = (GLushort) (indexes[i] & 0xffff);
-               }
-            }
-            break;
-         case GL_UNSIGNED_INT:
-            memcpy(dest, indexes, n * sizeof(GLuint));
-            break;
-         default:
-            _mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
-      }
-   }
-}
-
-
-void
-_mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
-                         GLenum dstType, GLvoid *dest, const GLstencil *source,
-                         const struct gl_pixelstore_attrib *dstPacking )
-{
-   GLstencil stencil[MAX_WIDTH];
-
-   ASSERT(n <= MAX_WIDTH);
-
-   if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
-       ctx->Pixel.MapStencilFlag) {
-      /* make a copy of input */
-      memcpy(stencil, source, n * sizeof(GLstencil));
-      _mesa_apply_stencil_transfer_ops(ctx, n, stencil);
-      source = stencil;
-   }
-
-   switch (dstType) {
-   case GL_UNSIGNED_BYTE:
-      if (sizeof(GLstencil) == 1) {
-         memcpy( dest, source, n );
-      }
-      else {
-         GLubyte *dst = (GLubyte *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLubyte) source[i];
-         }
-      }
-      break;
-   case GL_BYTE:
-      {
-         GLbyte *dst = (GLbyte *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLbyte) (source[i] & 0x7f);
-         }
-      }
-      break;
-   case GL_UNSIGNED_SHORT:
-      {
-         GLushort *dst = (GLushort *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLushort) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_SHORT:
-      {
-         GLshort *dst = (GLshort *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLshort) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_UNSIGNED_INT:
-      {
-         GLuint *dst = (GLuint *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLuint) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_INT:
-      {
-         GLint *dst = (GLint *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLint) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_FLOAT:
-      {
-         GLfloat *dst = (GLfloat *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = (GLfloat) source[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_HALF_FLOAT_ARB:
-      {
-         GLhalfARB *dst = (GLhalfARB *) dest;
-         GLuint i;
-         for (i=0;i<n;i++) {
-            dst[i] = _mesa_float_to_half( (float) source[i] );
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_BITMAP:
-      if (dstPacking->LsbFirst) {
-         GLubyte *dst = (GLubyte *) dest;
-         GLint shift = 0;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            if (shift == 0)
-               *dst = 0;
-            *dst |= ((source[i] != 0) << shift);
-            shift++;
-            if (shift == 8) {
-               shift = 0;
-               dst++;
-            }
-         }
-      }
-      else {
-         GLubyte *dst = (GLubyte *) dest;
-         GLint shift = 7;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            if (shift == 7)
-               *dst = 0;
-            *dst |= ((source[i] != 0) << shift);
-            shift--;
-            if (shift < 0) {
-               shift = 7;
-               dst++;
-            }
-         }
-      }
-      break;
-   default:
-      _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
-   }
-}
-
-#define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT)                              \
-    do {                                                                \
-        GLuint i;                                                       \
-        const GLTYPE *src = (const GLTYPE *)source;                     \
-        for (i = 0; i < n; i++) {                                       \
-            GLTYPE value = src[i];                                      \
-            if (srcPacking->SwapBytes) {                                \
-                if (sizeof(GLTYPE) == 2) {                              \
-                    SWAP2BYTE(value);                                   \
-                } else if (sizeof(GLTYPE) == 4) {                       \
-                    SWAP4BYTE(value);                                   \
-                }                                                       \
-            }                                                           \
-            depthValues[i] = GLTYPE2FLOAT(value);                       \
-        }                                                               \
-    } while (0)
-
-
-/**
- * Unpack a row of depth/z values from memory, returning GLushort, GLuint
- * or GLfloat values.
- * The glPixelTransfer (scale/bias) params will be applied.
- *
- * \param dstType  one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
- * \param depthMax  max value for returned GLushort or GLuint values
- *                  (ignored for GLfloat).
- */
-void
-_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
-                         GLenum dstType, GLvoid *dest, GLuint depthMax,
-                         GLenum srcType, const GLvoid *source,
-                         const struct gl_pixelstore_attrib *srcPacking )
-{
-   GLfloat depthTemp[MAX_WIDTH], *depthValues;
-   GLboolean needClamp = GL_FALSE;
-
-   /* Look for special cases first.
-    * Not only are these faster, they're less prone to numeric conversion
-    * problems.  Otherwise, converting from an int type to a float then
-    * back to an int type can introduce errors that will show up as
-    * artifacts in things like depth peeling which uses glCopyTexImage.
-    */
-   if (ctx->Pixel.DepthScale == 1.0 && ctx->Pixel.DepthBias == 0.0) {
-      if (srcType == GL_UNSIGNED_INT && dstType == GL_UNSIGNED_SHORT) {
-         const GLuint *src = (const GLuint *) source;
-         GLushort *dst = (GLushort *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = src[i] >> 16;
-         }
-         return;
-      }
-      if (srcType == GL_UNSIGNED_SHORT
-          && dstType == GL_UNSIGNED_INT
-          && depthMax == 0xffffffff) {
-         const GLushort *src = (const GLushort *) source;
-         GLuint *dst = (GLuint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = src[i] | (src[i] << 16);
-         }
-         return;
-      }
-      if (srcType == GL_UNSIGNED_INT_24_8
-          && dstType == GL_UNSIGNED_INT
-          && depthMax == 0xffffff) {
-         const GLuint *src = (const GLuint *) source;
-         GLuint *dst = (GLuint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = src[i] >> 8;
-         }
-         return;
-      }
-      /* XXX may want to add additional cases here someday */
-   }
-
-   /* general case path follows */
-
-   if (dstType == GL_FLOAT) {
-      depthValues = (GLfloat *) dest;
-   }
-   else {
-      depthValues = depthTemp;
-   }
-
-   /* Convert incoming values to GLfloat.  Some conversions will require
-    * clamping, below.
-    */
-   switch (srcType) {
-      case GL_BYTE:
-         DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT);
-         needClamp = GL_TRUE;
-         break;
-      case GL_UNSIGNED_BYTE:
-         DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT);
-         break;
-      case GL_SHORT:
-         DEPTH_VALUES(GLshort, SHORT_TO_FLOAT);
-         needClamp = GL_TRUE;
-         break;
-      case GL_UNSIGNED_SHORT:
-         DEPTH_VALUES(GLushort, USHORT_TO_FLOAT);
-         break;
-      case GL_INT:
-         DEPTH_VALUES(GLint, INT_TO_FLOAT);
-         needClamp = GL_TRUE;
-         break;
-      case GL_UNSIGNED_INT:
-         DEPTH_VALUES(GLuint, UINT_TO_FLOAT);
-         break;
-      case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
-         if (dstType == GL_UNSIGNED_INT_24_8_EXT &&
-             depthMax == 0xffffff &&
-             ctx->Pixel.DepthScale == 1.0 &&
-             ctx->Pixel.DepthBias == 0.0) {
-            const GLuint *src = (const GLuint *) source;
-            GLuint *zValues = (GLuint *) dest;
-            GLuint i;
-            for (i = 0; i < n; i++) {
-                GLuint value = src[i];
-                if (srcPacking->SwapBytes) {
-                    SWAP4BYTE(value);
-                }
-                zValues[i] = value & 0xffffff00;
-            }
-            return;
-         }
-         else {
-            const GLuint *src = (const GLuint *) source;
-            const GLfloat scale = 1.0f / 0xffffff;
-            GLuint i;
-            for (i = 0; i < n; i++) {
-                GLuint value = src[i];
-                if (srcPacking->SwapBytes) {
-                    SWAP4BYTE(value);
-                }
-                depthValues[i] = (value >> 8) * scale;
-            }
-         }
-         break;
-      case GL_FLOAT:
-         DEPTH_VALUES(GLfloat, 1*);
-         needClamp = GL_TRUE;
-         break;
-      case GL_HALF_FLOAT_ARB:
-         {
-            GLuint i;
-            const GLhalfARB *src = (const GLhalfARB *) source;
-            for (i = 0; i < n; i++) {
-               GLhalfARB value = src[i];
-               if (srcPacking->SwapBytes) {
-                  SWAP2BYTE(value);
-               }
-               depthValues[i] = _mesa_half_to_float(value);
-            }
-            needClamp = GL_TRUE;
-         }
-         break;
-      default:
-         _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
-         return;
-   }
-
-   /* apply depth scale and bias */
-   {
-      const GLfloat scale = ctx->Pixel.DepthScale;
-      const GLfloat bias = ctx->Pixel.DepthBias;
-      if (scale != 1.0 || bias != 0.0) {
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            depthValues[i] = depthValues[i] * scale + bias;
-         }
-         needClamp = GL_TRUE;
-      }
-   }
-
-   /* clamp to [0, 1] */
-   if (needClamp) {
-      GLuint i;
-      for (i = 0; i < n; i++) {
-         depthValues[i] = (GLfloat)CLAMP(depthValues[i], 0.0, 1.0);
-      }
-   }
-
-   /*
-    * Convert values to dstType
-    */
-   if (dstType == GL_UNSIGNED_INT) {
-      GLuint *zValues = (GLuint *) dest;
-      GLuint i;
-      if (depthMax <= 0xffffff) {
-         /* no overflow worries */
-         for (i = 0; i < n; i++) {
-            zValues[i] = (GLuint) (depthValues[i] * (GLfloat) depthMax);
-         }
-      }
-      else {
-         /* need to use double precision to prevent overflow problems */
-         for (i = 0; i < n; i++) {
-            GLdouble z = depthValues[i] * (GLfloat) depthMax;
-            if (z >= (GLdouble) 0xffffffff)
-               zValues[i] = 0xffffffff;
-            else
-               zValues[i] = (GLuint) z;
-         }
-      }
-   }
-   else if (dstType == GL_UNSIGNED_SHORT) {
-      GLushort *zValues = (GLushort *) dest;
-      GLuint i;
-      ASSERT(depthMax <= 0xffff);
-      for (i = 0; i < n; i++) {
-         zValues[i] = (GLushort) (depthValues[i] * (GLfloat) depthMax);
-      }
-   }
-   else {
-      ASSERT(dstType == GL_FLOAT);
-      /*ASSERT(depthMax == 1.0F);*/
-   }
-}
-
-
-/*
- * Pack an array of depth values.  The values are floats in [0,1].
- */
-void
-_mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
-                       GLenum dstType, const GLfloat *depthSpan,
-                       const struct gl_pixelstore_attrib *dstPacking )
-{
-   GLfloat depthCopy[MAX_WIDTH];
-
-   ASSERT(n <= MAX_WIDTH);
-
-   if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
-      memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
-      _mesa_scale_and_bias_depth(ctx, n, depthCopy);
-      depthSpan = depthCopy;
-   }
-
-   switch (dstType) {
-   case GL_UNSIGNED_BYTE:
-      {
-         GLubyte *dst = (GLubyte *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = FLOAT_TO_UBYTE( depthSpan[i] );
-         }
-      }
-      break;
-   case GL_BYTE:
-      {
-         GLbyte *dst = (GLbyte *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = FLOAT_TO_BYTE( depthSpan[i] );
-         }
-      }
-      break;
-   case GL_UNSIGNED_SHORT:
-      {
-         GLushort *dst = (GLushort *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            CLAMPED_FLOAT_TO_USHORT(dst[i], depthSpan[i]);
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_SHORT:
-      {
-         GLshort *dst = (GLshort *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = FLOAT_TO_SHORT( depthSpan[i] );
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   case GL_UNSIGNED_INT:
-      {
-         GLuint *dst = (GLuint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = FLOAT_TO_UINT( depthSpan[i] );
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_INT:
-      {
-         GLint *dst = (GLint *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = FLOAT_TO_INT( depthSpan[i] );
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_FLOAT:
-      {
-         GLfloat *dst = (GLfloat *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = depthSpan[i];
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap4( (GLuint *) dst, n );
-         }
-      }
-      break;
-   case GL_HALF_FLOAT_ARB:
-      {
-         GLhalfARB *dst = (GLhalfARB *) dest;
-         GLuint i;
-         for (i = 0; i < n; i++) {
-            dst[i] = _mesa_float_to_half(depthSpan[i]);
-         }
-         if (dstPacking->SwapBytes) {
-            _mesa_swap2( (GLushort *) dst, n );
-         }
-      }
-      break;
-   default:
-      _mesa_problem(ctx, "bad type in _mesa_pack_depth_span");
-   }
-}
-
-
-
-/**
- * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
- */
-void
-_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
-                              const GLfloat *depthVals,
-                              const GLstencil *stencilVals,
-                              const struct gl_pixelstore_attrib *dstPacking)
-{
-   GLfloat depthCopy[MAX_WIDTH];
-   GLstencil stencilCopy[MAX_WIDTH];
-   GLuint i;
-
-   ASSERT(n <= MAX_WIDTH);
-
-   if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
-      memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
-      _mesa_scale_and_bias_depth(ctx, n, depthCopy);
-      depthVals = depthCopy;
-   }
-
-   if (ctx->Pixel.IndexShift ||
-       ctx->Pixel.IndexOffset ||
-       ctx->Pixel.MapStencilFlag) {
-      memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
-      _mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy);
-      stencilVals = stencilCopy;
-   }
-
-   for (i = 0; i < n; i++) {
-      GLuint z = (GLuint) (depthVals[i] * 0xffffff);
-      dest[i] = (z << 8) | (stencilVals[i] & 0xff);
-   }
-
-   if (dstPacking->SwapBytes) {
-      _mesa_swap4(dest, n);
-   }
-}
-
-
-
-
-/**
- * Unpack image data.  Apply byte swapping, byte flipping (bitmap).
- * Return all image data in a contiguous block.  This is used when we
- * compile glDrawPixels, glTexImage, etc into a display list.  We
- * need a copy of the data in a standard format.
- */
-void *
-_mesa_unpack_image( GLuint dimensions,
-                    GLsizei width, GLsizei height, GLsizei depth,
-                    GLenum format, GLenum type, const GLvoid *pixels,
-                    const struct gl_pixelstore_attrib *unpack )
-{
-   GLint bytesPerRow, compsPerRow;
-   GLboolean flipBytes, swap2, swap4;
-
-   if (!pixels)
-      return NULL;  /* not necessarily an error */
-
-   if (width <= 0 || height <= 0 || depth <= 0)
-      return NULL;  /* generate error later */
-
-   if (type == GL_BITMAP) {
-      bytesPerRow = (width + 7) >> 3;
-      flipBytes = unpack->LsbFirst;
-      swap2 = swap4 = GL_FALSE;
-      compsPerRow = 0;
-   }
-   else {
-      const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
-      GLint components = _mesa_components_in_format(format);
-      GLint bytesPerComp;
-
-      if (_mesa_type_is_packed(type))
-          components = 1;
-
-      if (bytesPerPixel <= 0 || components <= 0)
-         return NULL;   /* bad format or type.  generate error later */
-      bytesPerRow = bytesPerPixel * width;
-      bytesPerComp = bytesPerPixel / components;
-      flipBytes = GL_FALSE;
-      swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
-      swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
-      compsPerRow = components * width;
-      assert(compsPerRow >= width);
-   }
-
-   {
-      GLubyte *destBuffer
-         = (GLubyte *) malloc(bytesPerRow * height * depth);
-      GLubyte *dst;
-      GLint img, row;
-      if (!destBuffer)
-         return NULL;   /* generate GL_OUT_OF_MEMORY later */
-
-      dst = destBuffer;
-      for (img = 0; img < depth; img++) {
-         for (row = 0; row < height; row++) {
-            const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels,
-                               width, height, format, type, img, row, 0);
-
-            if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
-               GLint i;
-               flipBytes = GL_FALSE;
-               if (unpack->LsbFirst) {
-                  GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
-                  GLubyte dstMask = 128;
-                  const GLubyte *s = src;
-                  GLubyte *d = dst;
-                  *d = 0;
-                  for (i = 0; i < width; i++) {
-                     if (*s & srcMask) {
-                        *d |= dstMask;
-                     }      
-                     if (srcMask == 128) {
-                        srcMask = 1;
-                        s++;
-                     }
-                     else {
-                        srcMask = srcMask << 1;
-                     }
-                     if (dstMask == 1) {
-                        dstMask = 128;
-                        d++;
-                        *d = 0;
-                     }
-                     else {
-                        dstMask = dstMask >> 1;
-                     }
-                  }
-               }
-               else {
-                  GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
-                  GLubyte dstMask = 128;
-                  const GLubyte *s = src;
-                  GLubyte *d = dst;
-                  *d = 0;
-                  for (i = 0; i < width; i++) {
-                     if (*s & srcMask) {
-                        *d |= dstMask;
-                     }
-                     if (srcMask == 1) {
-                        srcMask = 128;
-                        s++;
-                     }
-                     else {
-                        srcMask = srcMask >> 1;
-                     }
-                     if (dstMask == 1) {
-                        dstMask = 128;
-                        d++;
-                        *d = 0;
-                     }
-                     else {
-                        dstMask = dstMask >> 1;
-                     }      
-                  }
-               }
-            }
-            else {
-               memcpy(dst, src, bytesPerRow);
-            }
-
-            /* byte flipping/swapping */
-            if (flipBytes) {
-               flip_bytes((GLubyte *) dst, bytesPerRow);
-            }
-            else if (swap2) {
-               _mesa_swap2((GLushort*) dst, compsPerRow);
-            }
-            else if (swap4) {
-               _mesa_swap4((GLuint*) dst, compsPerRow);
-            }
-            dst += bytesPerRow;
-         }
-      }
-      return destBuffer;
-   }
-}
-
-#endif /* _HAVE_FULL_GL */
-
-
-
-/**
- * Convert an array of RGBA colors from one datatype to another.
- * NOTE: src may equal dst.  In that case, we use a temporary buffer.
- */
-void
-_mesa_convert_colors(GLenum srcType, const GLvoid *src,
-                     GLenum dstType, GLvoid *dst,
-                     GLuint count, const GLubyte mask[])
-{
-   GLuint tempBuffer[MAX_WIDTH][4];
-   const GLboolean useTemp = (src == dst);
-
-   ASSERT(srcType != dstType);
-
-   switch (srcType) {
-   case GL_UNSIGNED_BYTE:
-      if (dstType == GL_UNSIGNED_SHORT) {
-         const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
-         GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
-               dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
-               dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
-               dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
-      }
-      else {
-         const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
-         GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         ASSERT(dstType == GL_FLOAT);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
-               dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
-               dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
-               dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
-      }
-      break;
-   case GL_UNSIGNED_SHORT:
-      if (dstType == GL_UNSIGNED_BYTE) {
-         const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
-         GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
-               dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
-               dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
-               dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
-      }
-      else {
-         const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
-         GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         ASSERT(dstType == GL_FLOAT);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
-               dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
-               dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
-               dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
-      }
-      break;
-   case GL_FLOAT:
-      if (dstType == GL_UNSIGNED_BYTE) {
-         const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
-         GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
-      }
-      else {
-         const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
-         GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
-         GLuint i;
-         ASSERT(dstType == GL_UNSIGNED_SHORT);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
-               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
-               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
-               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
-            }
-         }
-         if (useTemp)
-            memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
-      }
-      break;
-   default:
-      _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
-   }
-}
-
-
-
-
-/**
- * Perform basic clipping for glDrawPixels.  The image's position and size
- * and the unpack SkipPixels and SkipRows are adjusted so that the image
- * region is entirely within the window and scissor bounds.
- * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
- * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
- * we'll actually write.  Beforehand, *destY-1 is the first drawing row.
- *
- * \return  GL_TRUE if image is ready for drawing or
- *          GL_FALSE if image was completely clipped away (draw nothing)
- */
-GLboolean
-_mesa_clip_drawpixels(const GLcontext *ctx,
-                      GLint *destX, GLint *destY,
-                      GLsizei *width, GLsizei *height,
-                      struct gl_pixelstore_attrib *unpack)
-{
-   const GLframebuffer *buffer = ctx->DrawBuffer;
-
-   if (unpack->RowLength == 0) {
-      unpack->RowLength = *width;
-   }
-
-   ASSERT(ctx->Pixel.ZoomX == 1.0F);
-   ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
-
-   /* left clipping */
-   if (*destX < buffer->_Xmin) {
-      unpack->SkipPixels += (buffer->_Xmin - *destX);
-      *width -= (buffer->_Xmin - *destX);
-      *destX = buffer->_Xmin;
-   }
-   /* right clipping */
-   if (*destX + *width > buffer->_Xmax)
-      *width -= (*destX + *width - buffer->_Xmax);
-
-   if (*width <= 0)
-      return GL_FALSE;
-
-   if (ctx->Pixel.ZoomY == 1.0F) {
-      /* bottom clipping */
-      if (*destY < buffer->_Ymin) {
-         unpack->SkipRows += (buffer->_Ymin - *destY);
-         *height -= (buffer->_Ymin - *destY);
-         *destY = buffer->_Ymin;
-      }
-      /* top clipping */
-      if (*destY + *height > buffer->_Ymax)
-         *height -= (*destY + *height - buffer->_Ymax);
-   }
-   else { /* upside down */
-      /* top clipping */
-      if (*destY > buffer->_Ymax) {
-         unpack->SkipRows += (*destY - buffer->_Ymax);
-         *height -= (*destY - buffer->_Ymax);
-         *destY = buffer->_Ymax;
-      }
-      /* bottom clipping */
-      if (*destY - *height < buffer->_Ymin)
-         *height -= (buffer->_Ymin - (*destY - *height));
-      /* adjust destY so it's the first row to write to */
-      (*destY)--;
-   }
-
-   if (*height <= 0)
-      return GL_FALSE;
-
-   return GL_TRUE;
-}
-
-
-/**
- * Perform clipping for glReadPixels.  The image's window position
- * and size, and the pack skipPixels, skipRows and rowLength are adjusted
- * so that the image region is entirely within the window bounds.
- * Note: this is different from _mesa_clip_drawpixels() in that the
- * scissor box is ignored, and we use the bounds of the current readbuffer
- * surface.
- *
- * \return  GL_TRUE if image is ready for drawing or
- *          GL_FALSE if image was completely clipped away (draw nothing)
- */
-GLboolean
-_mesa_clip_readpixels(const GLcontext *ctx,
-                      GLint *srcX, GLint *srcY,
-                      GLsizei *width, GLsizei *height,
-                      struct gl_pixelstore_attrib *pack)
-{
-   const GLframebuffer *buffer = ctx->ReadBuffer;
-
-   if (pack->RowLength == 0) {
-      pack->RowLength = *width;
-   }
-
-   /* left clipping */
-   if (*srcX < 0) {
-      pack->SkipPixels += (0 - *srcX);
-      *width -= (0 - *srcX);
-      *srcX = 0;
-   }
-   /* right clipping */
-   if (*srcX + *width > (GLsizei) buffer->Width)
-      *width -= (*srcX + *width - buffer->Width);
-
-   if (*width <= 0)
-      return GL_FALSE;
-
-   /* bottom clipping */
-   if (*srcY < 0) {
-      pack->SkipRows += (0 - *srcY);
-      *height -= (0 - *srcY);
-      *srcY = 0;
-   }
-   /* top clipping */
-   if (*srcY + *height > (GLsizei) buffer->Height)
-      *height -= (*srcY + *height - buffer->Height);
-
-   if (*height <= 0)
-      return GL_FALSE;
-
-   return GL_TRUE;
-}
-
-
-/**
- * Do clipping for a glCopyTexSubImage call.
- * The framebuffer source region might extend outside the framebuffer
- * bounds.  Clip the source region against the framebuffer bounds and
- * adjust the texture/dest position and size accordingly.
- *
- * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
- */
-GLboolean
-_mesa_clip_copytexsubimage(const GLcontext *ctx,
-                           GLint *destX, GLint *destY,
-                           GLint *srcX, GLint *srcY,
-                           GLsizei *width, GLsizei *height)
-{
-   const struct gl_framebuffer *fb = ctx->ReadBuffer;
-   const GLint srcX0 = *srcX, srcY0 = *srcY;
-
-   if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
-                            srcX, srcY, width, height)) {
-      *destX = *destX + *srcX - srcX0;
-      *destY = *destY + *srcY - srcY0;
-
-      return GL_TRUE;
-   }
-   else {
-      return GL_FALSE;
-   }
-}
-
-
-
-/**
- * Clip the rectangle defined by (x, y, width, height) against the bounds
- * specified by [xmin, xmax) and [ymin, ymax).
- * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
- */
-GLboolean
-_mesa_clip_to_region(GLint xmin, GLint ymin,
-                     GLint xmax, GLint ymax,
-                     GLint *x, GLint *y,
-                     GLsizei *width, GLsizei *height )
-{
-   /* left clipping */
-   if (*x < xmin) {
-      *width -= (xmin - *x);
-      *x = xmin;
-   }
-
-   /* right clipping */
-   if (*x + *width > xmax)
-      *width -= (*x + *width - xmax);
-
-   if (*width <= 0)
-      return GL_FALSE;
-
-   /* bottom (or top) clipping */
-   if (*y < ymin) {
-      *height -= (ymin - *y);
-      *y = ymin;
-   }
-
-   /* top (or bottom) clipping */
-   if (*y + *height > ymax)
-      *height -= (*y + *height - ymax);
-
-   if (*height <= 0)
-      return GL_FALSE;
-
-   return GL_TRUE;
-}
-
-
-/**
- * Clip dst coords against Xmax (or Ymax).
- */
-static INLINE void
-clip_right_or_top(GLint *srcX0, GLint *srcX1,
-                  GLint *dstX0, GLint *dstX1,
-                  GLint maxValue)
-{
-   GLfloat t, bias;
-
-   if (*dstX1 > maxValue) {
-      /* X1 outside right edge */
-      ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */
-      t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
-      /* chop off [t, 1] part */
-      ASSERT(t >= 0.0 && t <= 1.0);
-      *dstX1 = maxValue;
-      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
-      *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
-   }
-   else if (*dstX0 > maxValue) {
-      /* X0 outside right edge */
-      ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */
-      t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
-      /* chop off [t, 1] part */
-      ASSERT(t >= 0.0 && t <= 1.0);
-      *dstX0 = maxValue;
-      bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;
-      *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
-   }
-}
-
-
-/**
- * Clip dst coords against Xmin (or Ymin).
- */
-static INLINE void
-clip_left_or_bottom(GLint *srcX0, GLint *srcX1,
-                    GLint *dstX0, GLint *dstX1,
-                    GLint minValue)
-{
-   GLfloat t, bias;
-
-   if (*dstX0 < minValue) {
-      /* X0 outside left edge */
-      ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */
-      t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
-      /* chop off [0, t] part */
-      ASSERT(t >= 0.0 && t <= 1.0);
-      *dstX0 = minValue;
-      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */
-      *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
-   }
-   else if (*dstX1 < minValue) {
-      /* X1 outside left edge */
-      ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */
-      t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
-      /* chop off [0, t] part */
-      ASSERT(t >= 0.0 && t <= 1.0);
-      *dstX1 = minValue;
-      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
-      *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
-   }
-}
-
-
-/**
- * Do clipping of blit src/dest rectangles.
- * The dest rect is clipped against both the buffer bounds and scissor bounds.
- * The src rect is just clipped against the buffer bounds.
- *
- * When either the src or dest rect is clipped, the other is also clipped
- * proportionately!
- *
- * Note that X0 need not be less than X1 (same for Y) for either the source
- * and dest rects.  That makes the clipping a little trickier.
- *
- * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
- */
-GLboolean
-_mesa_clip_blit(GLcontext *ctx,
-                GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,
-                GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)
-{
-   const GLint srcXmin = 0;
-   const GLint srcXmax = ctx->ReadBuffer->Width;
-   const GLint srcYmin = 0;
-   const GLint srcYmax = ctx->ReadBuffer->Height;
-
-   /* these include scissor bounds */
-   const GLint dstXmin = ctx->DrawBuffer->_Xmin;
-   const GLint dstXmax = ctx->DrawBuffer->_Xmax;
-   const GLint dstYmin = ctx->DrawBuffer->_Ymin;
-   const GLint dstYmax = ctx->DrawBuffer->_Ymax;
-
-   /*
-   printf("PreClipX:  src: %d .. %d  dst: %d .. %d\n",
-          *srcX0, *srcX1, *dstX0, *dstX1);
-   printf("PreClipY:  src: %d .. %d  dst: %d .. %d\n",
-          *srcY0, *srcY1, *dstY0, *dstY1);
-   */
-
-   /* trivial rejection tests */
-   if (*dstX0 == *dstX1)
-      return GL_FALSE; /* no width */
-   if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)
-      return GL_FALSE; /* totally out (left) of bounds */
-   if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)
-      return GL_FALSE; /* totally out (right) of bounds */
-
-   if (*dstY0 == *dstY1)
-      return GL_FALSE;
-   if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)
-      return GL_FALSE;
-   if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)
-      return GL_FALSE;
-
-   if (*srcX0 == *srcX1)
-      return GL_FALSE;
-   if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)
-      return GL_FALSE;
-   if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)
-      return GL_FALSE;
-
-   if (*srcY0 == *srcY1)
-      return GL_FALSE;
-   if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)
-      return GL_FALSE;
-   if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)
-      return GL_FALSE;
-
-   /*
-    * dest clip
-    */
-   clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);
-   clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);
-   clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);
-   clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);
-
-   /*
-    * src clip (just swap src/dst values from above)
-    */
-   clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);
-   clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);
-   clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);
-   clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);
-
-   /*
-   printf("PostClipX: src: %d .. %d  dst: %d .. %d\n",
-          *srcX0, *srcX1, *dstX0, *dstX1);
-   printf("PostClipY: src: %d .. %d  dst: %d .. %d\n",
-          *srcY0, *srcY1, *dstY0, *dstY1);
-   */
-
-   ASSERT(*dstX0 >= dstXmin);
-   ASSERT(*dstX0 <= dstXmax);
-   ASSERT(*dstX1 >= dstXmin);
-   ASSERT(*dstX1 <= dstXmax);
-
-   ASSERT(*dstY0 >= dstYmin);
-   ASSERT(*dstY0 <= dstYmax);
-   ASSERT(*dstY1 >= dstYmin);
-   ASSERT(*dstY1 <= dstYmax);
-
-   ASSERT(*srcX0 >= srcXmin);
-   ASSERT(*srcX0 <= srcXmax);
-   ASSERT(*srcX1 >= srcXmin);
-   ASSERT(*srcX1 <= srcXmax);
-
-   ASSERT(*srcY0 >= srcYmin);
-   ASSERT(*srcY0 <= srcYmax);
-   ASSERT(*srcY1 >= srcYmin);
-   ASSERT(*srcY1 <= srcYmax);
-
-   return GL_TRUE;
-}
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.5

+ *

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

+ * Copyright (C) 2009  VMware, Inc.  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 image.c

+ * Image handling.

+ */

+

+

+#include "glheader.h"

+#include "colormac.h"

+#include "image.h"

+#include "imports.h"

+#include "macros.h"

+

+

+/**

+ * NOTE:

+ * Normally, BYTE_TO_FLOAT(0) returns 0.00392  That causes problems when

+ * we later convert the float to a packed integer value (such as for

+ * GL_RGB5_A1) because we'll wind up with a non-zero value.

+ *

+ * We redefine the macros here so zero is handled correctly.

+ */

+#undef BYTE_TO_FLOAT

+#define BYTE_TO_FLOAT(B)    ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))

+

+#undef SHORT_TO_FLOAT

+#define SHORT_TO_FLOAT(S)   ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))

+

+

+

+/** Compute ceiling of integer quotient of A divided by B. */

+#define CEILING( A, B )  ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )

+

+

+/**

+ * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.

+ */

+GLboolean

+_mesa_type_is_packed(GLenum type)

+{

+   switch (type) {

+   case GL_UNSIGNED_BYTE_3_3_2:

+   case GL_UNSIGNED_BYTE_2_3_3_REV:

+   case GL_UNSIGNED_SHORT_5_6_5:

+   case GL_UNSIGNED_SHORT_5_6_5_REV:

+   case GL_UNSIGNED_SHORT_4_4_4_4:

+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:

+   case GL_UNSIGNED_SHORT_5_5_5_1:

+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:

+   case GL_UNSIGNED_INT_8_8_8_8:

+   case GL_UNSIGNED_INT_8_8_8_8_REV:

+   case GL_UNSIGNED_INT_10_10_10_2:

+   case GL_UNSIGNED_INT_2_10_10_10_REV:

+   case GL_UNSIGNED_SHORT_8_8_MESA:

+   case GL_UNSIGNED_SHORT_8_8_REV_MESA:

+   case GL_UNSIGNED_INT_24_8_EXT:

+      return GL_TRUE;

+   }

+

+   return GL_FALSE;

+}

+

+

+

+/**

+ * Flip the order of the 2 bytes in each word in the given array.

+ *

+ * \param p array.

+ * \param n number of words.

+ */

+void

+_mesa_swap2( GLushort *p, GLuint n )

+{

+   GLuint i;

+   for (i = 0; i < n; i++) {

+      p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);

+   }

+}

+

+

+

+/*

+ * Flip the order of the 4 bytes in each word in the given array.

+ */

+void

+_mesa_swap4( GLuint *p, GLuint n )

+{

+   GLuint i, a, b;

+   for (i = 0; i < n; i++) {

+      b = p[i];

+      a =  (b >> 24)

+	| ((b >> 8) & 0xff00)

+	| ((b << 8) & 0xff0000)

+	| ((b << 24) & 0xff000000);

+      p[i] = a;

+   }

+}

+

+

+/**

+ * Get the size of a GL data type.

+ *

+ * \param type GL data type.

+ *

+ * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1

+ * if an invalid type enum.

+ */

+GLint

+_mesa_sizeof_type( GLenum type )

+{

+   switch (type) {

+      case GL_BITMAP:

+	 return 0;

+      case GL_UNSIGNED_BYTE:

+         return sizeof(GLubyte);

+      case GL_BYTE:

+	 return sizeof(GLbyte);

+      case GL_UNSIGNED_SHORT:

+	 return sizeof(GLushort);

+      case GL_SHORT:

+	 return sizeof(GLshort);

+      case GL_UNSIGNED_INT:

+	 return sizeof(GLuint);

+      case GL_INT:

+	 return sizeof(GLint);

+      case GL_FLOAT:

+	 return sizeof(GLfloat);

+      case GL_DOUBLE:

+	 return sizeof(GLdouble);

+      case GL_HALF_FLOAT_ARB:

+	 return sizeof(GLhalfARB);

+      case GL_FIXED:

+	 return sizeof(GLfixed);

+      default:

+         return -1;

+   }

+}

+

+

+/**

+ * Same as _mesa_sizeof_type() but also accepting the packed pixel

+ * format data types.

+ */

+GLint

+_mesa_sizeof_packed_type( GLenum type )

+{

+   switch (type) {

+      case GL_BITMAP:

+	 return 0;

+      case GL_UNSIGNED_BYTE:

+         return sizeof(GLubyte);

+      case GL_BYTE:

+	 return sizeof(GLbyte);

+      case GL_UNSIGNED_SHORT:

+	 return sizeof(GLushort);

+      case GL_SHORT:

+	 return sizeof(GLshort);

+      case GL_UNSIGNED_INT:

+	 return sizeof(GLuint);

+      case GL_INT:

+	 return sizeof(GLint);

+      case GL_HALF_FLOAT_ARB:

+	 return sizeof(GLhalfARB);

+      case GL_FLOAT:

+	 return sizeof(GLfloat);

+      case GL_UNSIGNED_BYTE_3_3_2:

+         return sizeof(GLubyte);

+      case GL_UNSIGNED_BYTE_2_3_3_REV:

+         return sizeof(GLubyte);

+      case GL_UNSIGNED_SHORT_5_6_5:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_SHORT_5_6_5_REV:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_SHORT_4_4_4_4:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_SHORT_4_4_4_4_REV:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_SHORT_5_5_5_1:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_SHORT_1_5_5_5_REV:

+         return sizeof(GLushort);

+      case GL_UNSIGNED_INT_8_8_8_8:

+         return sizeof(GLuint);

+      case GL_UNSIGNED_INT_8_8_8_8_REV:

+         return sizeof(GLuint);

+      case GL_UNSIGNED_INT_10_10_10_2:

+         return sizeof(GLuint);

+      case GL_UNSIGNED_INT_2_10_10_10_REV:

+         return sizeof(GLuint);

+      case GL_UNSIGNED_SHORT_8_8_MESA:

+      case GL_UNSIGNED_SHORT_8_8_REV_MESA:

+         return sizeof(GLushort);      

+      case GL_UNSIGNED_INT_24_8_EXT:

+         return sizeof(GLuint);

+      default:

+         return -1;

+   }

+}

+

+

+/**

+ * Get the number of components in a pixel format.

+ *

+ * \param format pixel format.

+ *

+ * \return the number of components in the given format, or -1 if a bad format.

+ */

+GLint

+_mesa_components_in_format( GLenum format )

+{

+   switch (format) {

+      case GL_COLOR_INDEX:

+      case GL_COLOR_INDEX1_EXT:

+      case GL_COLOR_INDEX2_EXT:

+      case GL_COLOR_INDEX4_EXT:

+      case GL_COLOR_INDEX8_EXT:

+      case GL_COLOR_INDEX12_EXT:

+      case GL_COLOR_INDEX16_EXT:

+      case GL_STENCIL_INDEX:

+      case GL_DEPTH_COMPONENT:

+      case GL_RED:

+      case GL_RED_INTEGER_EXT:

+      case GL_GREEN:

+      case GL_GREEN_INTEGER_EXT:

+      case GL_BLUE:

+      case GL_BLUE_INTEGER_EXT:

+      case GL_ALPHA:

+      case GL_ALPHA_INTEGER_EXT:

+      case GL_LUMINANCE:

+      case GL_LUMINANCE_INTEGER_EXT:

+      case GL_INTENSITY:

+         return 1;

+      case GL_LUMINANCE_ALPHA:

+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:

+      case GL_RG:

+	 return 2;

+      case GL_RGB:

+      case GL_RGB_INTEGER_EXT:

+	 return 3;

+      case GL_RGBA:

+      case GL_RGBA_INTEGER_EXT:

+	 return 4;

+      case GL_BGR:

+	 return 3;

+      case GL_BGRA:

+	 return 4;

+      case GL_ABGR_EXT:

+         return 4;

+      case GL_YCBCR_MESA:

+         return 2;

+      case GL_DEPTH_STENCIL_EXT:

+         return 2;

+      case GL_DUDV_ATI:

+      case GL_DU8DV8_ATI:

+         return 2;

+      default:

+         return -1;

+   }

+}

+

+

+/**

+ * Get the bytes per pixel of pixel format type pair.

+ *

+ * \param format pixel format.

+ * \param type pixel type.

+ *

+ * \return bytes per pixel, or -1 if a bad format or type was given.

+ */

+GLint

+_mesa_bytes_per_pixel( GLenum format, GLenum type )

+{

+   GLint comps = _mesa_components_in_format( format );

+   if (comps < 0)

+      return -1;

+

+   switch (type) {

+      case GL_BITMAP:

+         return 0;  /* special case */

+      case GL_BYTE:

+      case GL_UNSIGNED_BYTE:

+         return comps * sizeof(GLubyte);

+      case GL_SHORT:

+      case GL_UNSIGNED_SHORT:

+         return comps * sizeof(GLshort);

+      case GL_INT:

+      case GL_UNSIGNED_INT:

+         return comps * sizeof(GLint);

+      case GL_FLOAT:

+         return comps * sizeof(GLfloat);

+      case GL_HALF_FLOAT_ARB:

+         return comps * sizeof(GLhalfARB);

+      case GL_UNSIGNED_BYTE_3_3_2:

+      case GL_UNSIGNED_BYTE_2_3_3_REV:

+         if (format == GL_RGB || format == GL_BGR ||

+             format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)

+            return sizeof(GLubyte);

+         else

+            return -1;  /* error */

+      case GL_UNSIGNED_SHORT_5_6_5:

+      case GL_UNSIGNED_SHORT_5_6_5_REV:

+         if (format == GL_RGB || format == GL_BGR ||

+             format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)

+            return sizeof(GLushort);

+         else

+            return -1;  /* error */

+      case GL_UNSIGNED_SHORT_4_4_4_4:

+      case GL_UNSIGNED_SHORT_4_4_4_4_REV:

+      case GL_UNSIGNED_SHORT_5_5_5_1:

+      case GL_UNSIGNED_SHORT_1_5_5_5_REV:

+         if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||

+             format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)

+            return sizeof(GLushort);

+         else

+            return -1;

+      case GL_UNSIGNED_INT_8_8_8_8:

+      case GL_UNSIGNED_INT_8_8_8_8_REV:

+      case GL_UNSIGNED_INT_10_10_10_2:

+      case GL_UNSIGNED_INT_2_10_10_10_REV:

+         if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||

+             format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)

+            return sizeof(GLuint);

+         else

+            return -1;

+      case GL_UNSIGNED_SHORT_8_8_MESA:

+      case GL_UNSIGNED_SHORT_8_8_REV_MESA:

+         if (format == GL_YCBCR_MESA)

+            return sizeof(GLushort);

+         else

+            return -1;

+      case GL_UNSIGNED_INT_24_8_EXT:

+         if (format == GL_DEPTH_STENCIL_EXT)

+            return sizeof(GLuint);

+         else

+            return -1;

+      default:

+         return -1;

+   }

+}

+

+

+/**

+ * Test for a legal pixel format and type.

+ *

+ * \param format pixel format.

+ * \param type pixel type.

+ *

+ * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE

+ * otherwise.

+ */

+GLboolean

+_mesa_is_legal_format_and_type(const struct gl_context *ctx,

+                               GLenum format, GLenum type)

+{

+   switch (format) {

+      case GL_COLOR_INDEX:

+      case GL_STENCIL_INDEX:

+         switch (type) {

+            case GL_BITMAP:

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_RED:

+      case GL_GREEN:

+      case GL_BLUE:

+      case GL_ALPHA:

+#if 0 /* not legal!  see table 3.6 of the 1.5 spec */

+      case GL_INTENSITY:

+#endif

+      case GL_LUMINANCE:

+      case GL_LUMINANCE_ALPHA:

+      case GL_DEPTH_COMPONENT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_RG:

+	 if (!ctx->Extensions.ARB_texture_rg)

+	    return GL_FALSE;

+

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_RGB:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+            case GL_UNSIGNED_BYTE_3_3_2:

+            case GL_UNSIGNED_BYTE_2_3_3_REV:

+            case GL_UNSIGNED_SHORT_5_6_5:

+            case GL_UNSIGNED_SHORT_5_6_5_REV:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_BGR:

+         switch (type) {

+            /* NOTE: no packed types are supported with BGR.  That's

+             * intentional, according to the GL spec.

+             */

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_RGBA:

+      case GL_BGRA:

+      case GL_ABGR_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+            case GL_UNSIGNED_SHORT_4_4_4_4:

+            case GL_UNSIGNED_SHORT_4_4_4_4_REV:

+            case GL_UNSIGNED_SHORT_5_5_5_1:

+            case GL_UNSIGNED_SHORT_1_5_5_5_REV:

+            case GL_UNSIGNED_INT_8_8_8_8:

+            case GL_UNSIGNED_INT_8_8_8_8_REV:

+            case GL_UNSIGNED_INT_10_10_10_2:

+            case GL_UNSIGNED_INT_2_10_10_10_REV:

+               return GL_TRUE;

+            case GL_HALF_FLOAT_ARB:

+               return ctx->Extensions.ARB_half_float_pixel;

+            default:

+               return GL_FALSE;

+         }

+      case GL_YCBCR_MESA:

+         if (type == GL_UNSIGNED_SHORT_8_8_MESA ||

+             type == GL_UNSIGNED_SHORT_8_8_REV_MESA)

+            return GL_TRUE;

+         else

+            return GL_FALSE;

+      case GL_DEPTH_STENCIL_EXT:

+         if (ctx->Extensions.EXT_packed_depth_stencil

+             && type == GL_UNSIGNED_INT_24_8_EXT)

+            return GL_TRUE;

+         else

+            return GL_FALSE;

+      case GL_DUDV_ATI:

+      case GL_DU8DV8_ATI:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_FLOAT:

+               return GL_TRUE;

+            default:

+               return GL_FALSE;

+         }

+

+      /* integer-valued formats */

+      case GL_RED_INTEGER_EXT:

+      case GL_GREEN_INTEGER_EXT:

+      case GL_BLUE_INTEGER_EXT:

+      case GL_ALPHA_INTEGER_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+               return ctx->Extensions.EXT_texture_integer;

+            default:

+               return GL_FALSE;

+         }

+

+      case GL_RGB_INTEGER_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_UNSIGNED_BYTE_3_3_2:

+            case GL_UNSIGNED_BYTE_2_3_3_REV:

+            case GL_UNSIGNED_SHORT_5_6_5:

+            case GL_UNSIGNED_SHORT_5_6_5_REV:

+               return ctx->Extensions.EXT_texture_integer;

+            default:

+               return GL_FALSE;

+         }

+

+      case GL_BGR_INTEGER_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            /* NOTE: no packed formats w/ BGR format */

+               return ctx->Extensions.EXT_texture_integer;

+            default:

+               return GL_FALSE;

+         }

+

+      case GL_RGBA_INTEGER_EXT:

+      case GL_BGRA_INTEGER_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+            case GL_UNSIGNED_SHORT_4_4_4_4:

+            case GL_UNSIGNED_SHORT_4_4_4_4_REV:

+            case GL_UNSIGNED_SHORT_5_5_5_1:

+            case GL_UNSIGNED_SHORT_1_5_5_5_REV:

+            case GL_UNSIGNED_INT_8_8_8_8:

+            case GL_UNSIGNED_INT_8_8_8_8_REV:

+            case GL_UNSIGNED_INT_10_10_10_2:

+            case GL_UNSIGNED_INT_2_10_10_10_REV:

+               return ctx->Extensions.EXT_texture_integer;

+            default:

+               return GL_FALSE;

+         }

+

+      case GL_LUMINANCE_INTEGER_EXT:

+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:

+         switch (type) {

+            case GL_BYTE:

+            case GL_UNSIGNED_BYTE:

+            case GL_SHORT:

+            case GL_UNSIGNED_SHORT:

+            case GL_INT:

+            case GL_UNSIGNED_INT:

+               return ctx->Extensions.EXT_texture_integer;

+            default:

+               return GL_FALSE;

+         }

+

+      default:

+         ; /* fall-through */

+   }

+   return GL_FALSE;

+}

+

+

+/**

+ * Test if the given image format is a color/RGBA format (i.e., not color

+ * index, depth, stencil, etc).

+ * \param format  the image format value (may by an internal texture format)

+ * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.

+ */

+GLboolean

+_mesa_is_color_format(GLenum format)

+{

+   switch (format) {

+      case GL_RED:

+      case GL_GREEN:

+      case GL_BLUE:

+      case GL_ALPHA:

+      case GL_ALPHA4:

+      case GL_ALPHA8:

+      case GL_ALPHA12:

+      case GL_ALPHA16:

+      case 1:

+      case GL_LUMINANCE:

+      case GL_LUMINANCE4:

+      case GL_LUMINANCE8:

+      case GL_LUMINANCE12:

+      case GL_LUMINANCE16:

+      case 2:

+      case GL_LUMINANCE_ALPHA:

+      case GL_LUMINANCE4_ALPHA4:

+      case GL_LUMINANCE6_ALPHA2:

+      case GL_LUMINANCE8_ALPHA8:

+      case GL_LUMINANCE12_ALPHA4:

+      case GL_LUMINANCE12_ALPHA12:

+      case GL_LUMINANCE16_ALPHA16:

+      case GL_INTENSITY:

+      case GL_INTENSITY4:

+      case GL_INTENSITY8:

+      case GL_INTENSITY12:

+      case GL_INTENSITY16:

+      case GL_R8:

+      case GL_R16:

+      case GL_RG:

+      case GL_RG8:

+      case GL_RG16:

+      case 3:

+      case GL_RGB:

+      case GL_BGR:

+      case GL_R3_G3_B2:

+      case GL_RGB4:

+      case GL_RGB5:

+      case GL_RGB8:

+      case GL_RGB10:

+      case GL_RGB12:

+      case GL_RGB16:

+      case 4:

+      case GL_ABGR_EXT:

+      case GL_RGBA:

+      case GL_BGRA:

+      case GL_RGBA2:

+      case GL_RGBA4:

+      case GL_RGB5_A1:

+      case GL_RGBA8:

+      case GL_RGB10_A2:

+      case GL_RGBA12:

+      case GL_RGBA16:

+      /* float texture formats */

+      case GL_ALPHA16F_ARB:

+      case GL_ALPHA32F_ARB:

+      case GL_LUMINANCE16F_ARB:

+      case GL_LUMINANCE32F_ARB:

+      case GL_LUMINANCE_ALPHA16F_ARB:

+      case GL_LUMINANCE_ALPHA32F_ARB:

+      case GL_INTENSITY16F_ARB:

+      case GL_INTENSITY32F_ARB:

+      case GL_R16F:

+      case GL_R32F:

+      case GL_RG16F:

+      case GL_RG32F:

+      case GL_RGB16F_ARB:

+      case GL_RGB32F_ARB:

+      case GL_RGBA16F_ARB:

+      case GL_RGBA32F_ARB:

+      /* compressed formats */

+      case GL_COMPRESSED_ALPHA:

+      case GL_COMPRESSED_LUMINANCE:

+      case GL_COMPRESSED_LUMINANCE_ALPHA:

+      case GL_COMPRESSED_INTENSITY:

+      case GL_COMPRESSED_RED:

+      case GL_COMPRESSED_RG:

+      case GL_COMPRESSED_RGB:

+      case GL_COMPRESSED_RGBA:

+      case GL_RGB_S3TC:

+      case GL_RGB4_S3TC:

+      case GL_RGBA_S3TC:

+      case GL_RGBA4_S3TC:

+      case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

+      case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

+      case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

+      case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

+      case GL_COMPRESSED_RGB_FXT1_3DFX:

+      case GL_COMPRESSED_RGBA_FXT1_3DFX:

+#if FEATURE_EXT_texture_sRGB

+      case GL_SRGB_EXT:

+      case GL_SRGB8_EXT:

+      case GL_SRGB_ALPHA_EXT:

+      case GL_SRGB8_ALPHA8_EXT:

+      case GL_SLUMINANCE_ALPHA_EXT:

+      case GL_SLUMINANCE8_ALPHA8_EXT:

+      case GL_SLUMINANCE_EXT:

+      case GL_SLUMINANCE8_EXT:

+      case GL_COMPRESSED_SRGB_EXT:

+      case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

+      case GL_COMPRESSED_SRGB_ALPHA_EXT:

+      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

+      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

+      case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

+      case GL_COMPRESSED_SLUMINANCE_EXT:

+      case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:

+#endif /* FEATURE_EXT_texture_sRGB */

+      case GL_COMPRESSED_RED_RGTC1:

+      case GL_COMPRESSED_SIGNED_RED_RGTC1:

+      case GL_COMPRESSED_RG_RGTC2:

+      case GL_COMPRESSED_SIGNED_RG_RGTC2:

+      /* signed, normalized texture formats */

+      case GL_RGBA_SNORM:

+      case GL_RGBA8_SNORM:

+      /* generic integer formats */

+      case GL_RED_INTEGER_EXT:

+      case GL_GREEN_INTEGER_EXT:

+      case GL_BLUE_INTEGER_EXT:

+      case GL_ALPHA_INTEGER_EXT:

+      case GL_RGB_INTEGER_EXT:

+      case GL_RGBA_INTEGER_EXT:

+      case GL_BGR_INTEGER_EXT:

+      case GL_BGRA_INTEGER_EXT:

+      case GL_LUMINANCE_INTEGER_EXT:

+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:

+      /* sized integer formats */

+      case GL_RGBA32UI_EXT:

+      case GL_RGB32UI_EXT:

+      case GL_ALPHA32UI_EXT:

+      case GL_INTENSITY32UI_EXT:

+      case GL_LUMINANCE32UI_EXT:

+      case GL_LUMINANCE_ALPHA32UI_EXT:

+      case GL_RGBA16UI_EXT:

+      case GL_RGB16UI_EXT:

+      case GL_ALPHA16UI_EXT:

+      case GL_INTENSITY16UI_EXT:

+      case GL_LUMINANCE16UI_EXT:

+      case GL_LUMINANCE_ALPHA16UI_EXT:

+      case GL_RGBA8UI_EXT:

+      case GL_RGB8UI_EXT:

+      case GL_ALPHA8UI_EXT:

+      case GL_INTENSITY8UI_EXT:

+      case GL_LUMINANCE8UI_EXT:

+      case GL_LUMINANCE_ALPHA8UI_EXT:

+      case GL_RGBA32I_EXT:

+      case GL_RGB32I_EXT:

+      case GL_ALPHA32I_EXT:

+      case GL_INTENSITY32I_EXT:

+      case GL_LUMINANCE32I_EXT:

+      case GL_LUMINANCE_ALPHA32I_EXT:

+      case GL_RGBA16I_EXT:

+      case GL_RGB16I_EXT:

+      case GL_ALPHA16I_EXT:

+      case GL_INTENSITY16I_EXT:

+      case GL_LUMINANCE16I_EXT:

+      case GL_LUMINANCE_ALPHA16I_EXT:

+      case GL_RGBA8I_EXT:

+      case GL_RGB8I_EXT:

+      case GL_ALPHA8I_EXT:

+      case GL_INTENSITY8I_EXT:

+      case GL_LUMINANCE8I_EXT:

+      case GL_LUMINANCE_ALPHA8I_EXT:

+         return GL_TRUE;

+      case GL_YCBCR_MESA:  /* not considered to be RGB */

+         /* fall-through */

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a color index format.

+ */

+GLboolean

+_mesa_is_index_format(GLenum format)

+{

+   switch (format) {

+      case GL_COLOR_INDEX:

+      case GL_COLOR_INDEX1_EXT:

+      case GL_COLOR_INDEX2_EXT:

+      case GL_COLOR_INDEX4_EXT:

+      case GL_COLOR_INDEX8_EXT:

+      case GL_COLOR_INDEX12_EXT:

+      case GL_COLOR_INDEX16_EXT:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a depth component format.

+ */

+GLboolean

+_mesa_is_depth_format(GLenum format)

+{

+   switch (format) {

+      case GL_DEPTH_COMPONENT:

+      case GL_DEPTH_COMPONENT16:

+      case GL_DEPTH_COMPONENT24:

+      case GL_DEPTH_COMPONENT32:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a stencil format.

+ */

+GLboolean

+_mesa_is_stencil_format(GLenum format)

+{

+   switch (format) {

+      case GL_STENCIL_INDEX:

+      case GL_DEPTH_STENCIL:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a YCbCr format.

+ */

+GLboolean

+_mesa_is_ycbcr_format(GLenum format)

+{

+   switch (format) {

+      case GL_YCBCR_MESA:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a depth+stencil format.

+ */

+GLboolean

+_mesa_is_depthstencil_format(GLenum format)

+{

+   switch (format) {

+      case GL_DEPTH24_STENCIL8_EXT:

+      case GL_DEPTH_STENCIL_EXT:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a depth or stencil format.

+ */

+GLboolean

+_mesa_is_depth_or_stencil_format(GLenum format)

+{

+   switch (format) {

+      case GL_DEPTH_COMPONENT:

+      case GL_DEPTH_COMPONENT16:

+      case GL_DEPTH_COMPONENT24:

+      case GL_DEPTH_COMPONENT32:

+      case GL_STENCIL_INDEX:

+      case GL_STENCIL_INDEX1_EXT:

+      case GL_STENCIL_INDEX4_EXT:

+      case GL_STENCIL_INDEX8_EXT:

+      case GL_STENCIL_INDEX16_EXT:

+      case GL_DEPTH_STENCIL_EXT:

+      case GL_DEPTH24_STENCIL8_EXT:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given image format is a dudv format.

+ */

+GLboolean

+_mesa_is_dudv_format(GLenum format)

+{

+   switch (format) {

+      case GL_DUDV_ATI:

+      case GL_DU8DV8_ATI:

+         return GL_TRUE;

+      default:

+         return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if the given format is an integer (non-normalized) format.

+ */

+GLboolean

+_mesa_is_integer_format(GLenum format)

+{

+   switch (format) {

+   /* generic integer formats */

+   case GL_RED_INTEGER_EXT:

+   case GL_GREEN_INTEGER_EXT:

+   case GL_BLUE_INTEGER_EXT:

+   case GL_ALPHA_INTEGER_EXT:

+   case GL_RGB_INTEGER_EXT:

+   case GL_RGBA_INTEGER_EXT:

+   case GL_BGR_INTEGER_EXT:

+   case GL_BGRA_INTEGER_EXT:

+   case GL_LUMINANCE_INTEGER_EXT:

+   case GL_LUMINANCE_ALPHA_INTEGER_EXT:

+   /* specific integer formats */

+   case GL_RGBA32UI_EXT:

+   case GL_RGB32UI_EXT:

+   case GL_ALPHA32UI_EXT:

+   case GL_INTENSITY32UI_EXT:

+   case GL_LUMINANCE32UI_EXT:

+   case GL_LUMINANCE_ALPHA32UI_EXT:

+   case GL_RGBA16UI_EXT:

+   case GL_RGB16UI_EXT:

+   case GL_ALPHA16UI_EXT:

+   case GL_INTENSITY16UI_EXT:

+   case GL_LUMINANCE16UI_EXT:

+   case GL_LUMINANCE_ALPHA16UI_EXT:

+   case GL_RGBA8UI_EXT:

+   case GL_RGB8UI_EXT:

+   case GL_ALPHA8UI_EXT:

+   case GL_INTENSITY8UI_EXT:

+   case GL_LUMINANCE8UI_EXT:

+   case GL_LUMINANCE_ALPHA8UI_EXT:

+   case GL_RGBA32I_EXT:

+   case GL_RGB32I_EXT:

+   case GL_ALPHA32I_EXT:

+   case GL_INTENSITY32I_EXT:

+   case GL_LUMINANCE32I_EXT:

+   case GL_LUMINANCE_ALPHA32I_EXT:

+   case GL_RGBA16I_EXT:

+   case GL_RGB16I_EXT:

+   case GL_ALPHA16I_EXT:

+   case GL_INTENSITY16I_EXT:

+   case GL_LUMINANCE16I_EXT:

+   case GL_LUMINANCE_ALPHA16I_EXT:

+   case GL_RGBA8I_EXT:

+   case GL_RGB8I_EXT:

+   case GL_ALPHA8I_EXT:

+   case GL_INTENSITY8I_EXT:

+   case GL_LUMINANCE8I_EXT:

+   case GL_LUMINANCE_ALPHA8I_EXT:

+      return GL_TRUE;

+   default:

+      return GL_FALSE;

+   }

+}

+

+

+/**

+ * Test if an image format is a supported compressed format.

+ * \param format the internal format token provided by the user.

+ * \return GL_TRUE if compressed, GL_FALSE if uncompressed

+ */

+GLboolean

+_mesa_is_compressed_format(struct gl_context *ctx, GLenum format)

+{

+   switch (format) {

+   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

+   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

+   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

+   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

+      return ctx->Extensions.EXT_texture_compression_s3tc;

+   case GL_RGB_S3TC:

+   case GL_RGB4_S3TC:

+   case GL_RGBA_S3TC:

+   case GL_RGBA4_S3TC:

+      return ctx->Extensions.S3_s3tc;

+   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

+      return ctx->Extensions.EXT_texture_sRGB

+         && ctx->Extensions.EXT_texture_compression_s3tc;

+   case GL_COMPRESSED_RGB_FXT1_3DFX:

+   case GL_COMPRESSED_RGBA_FXT1_3DFX:

+      return ctx->Extensions.TDFX_texture_compression_FXT1;

+   case GL_COMPRESSED_RED_RGTC1:

+   case GL_COMPRESSED_SIGNED_RED_RGTC1:

+   case GL_COMPRESSED_RG_RGTC2:

+   case GL_COMPRESSED_SIGNED_RG_RGTC2:

+      return ctx->Extensions.ARB_texture_compression_rgtc;

+   default:

+      return GL_FALSE;

+   }

+}

+

+

+/**

+ * Return the address of a specific pixel in an image (1D, 2D or 3D).

+ *

+ * Pixel unpacking/packing parameters are observed according to \p packing.

+ *

+ * \param dimensions either 1, 2 or 3 to indicate dimensionality of image

+ * \param image  starting address of image data

+ * \param width  the image width

+ * \param height  theimage height

+ * \param format  the pixel format

+ * \param type  the pixel data type

+ * \param packing  the pixelstore attributes

+ * \param img  which image in the volume (0 for 1D or 2D images)

+ * \param row  row of pixel in the image (0 for 1D images)

+ * \param column column of pixel in the image

+ * 

+ * \return address of pixel on success, or NULL on error.

+ *

+ * \sa gl_pixelstore_attrib.

+ */

+GLvoid *

+_mesa_image_address( GLuint dimensions,

+                     const struct gl_pixelstore_attrib *packing,

+                     const GLvoid *image,

+                     GLsizei width, GLsizei height,

+                     GLenum format, GLenum type,

+                     GLint img, GLint row, GLint column )

+{

+   GLint alignment;        /* 1, 2 or 4 */

+   GLint pixels_per_row;

+   GLint rows_per_image;

+   GLint skiprows;

+   GLint skippixels;

+   GLint skipimages;       /* for 3-D volume images */

+   GLubyte *pixel_addr;

+

+   ASSERT(dimensions >= 1 && dimensions <= 3);

+

+   alignment = packing->Alignment;

+   if (packing->RowLength > 0) {

+      pixels_per_row = packing->RowLength;

+   }

+   else {

+      pixels_per_row = width;

+   }

+   if (packing->ImageHeight > 0) {

+      rows_per_image = packing->ImageHeight;

+   }

+   else {

+      rows_per_image = height;

+   }

+

+   skippixels = packing->SkipPixels;

+   /* Note: SKIP_ROWS _is_ used for 1D images */

+   skiprows = packing->SkipRows;

+   /* Note: SKIP_IMAGES is only used for 3D images */

+   skipimages = (dimensions == 3) ? packing->SkipImages : 0;

+

+   if (type == GL_BITMAP) {

+      /* BITMAP data */

+      GLint comp_per_pixel;   /* components per pixel */

+      GLint bytes_per_comp;   /* bytes per component */

+      GLint bytes_per_row;

+      GLint bytes_per_image;

+

+      /* Compute bytes per component */

+      bytes_per_comp = _mesa_sizeof_packed_type( type );

+      if (bytes_per_comp < 0) {

+         return NULL;

+      }

+

+      /* Compute number of components per pixel */

+      comp_per_pixel = _mesa_components_in_format( format );

+      if (comp_per_pixel < 0) {

+         return NULL;

+      }

+

+      bytes_per_row = alignment

+                    * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );

+

+      bytes_per_image = bytes_per_row * rows_per_image;

+

+      pixel_addr = (GLubyte *) image

+                 + (skipimages + img) * bytes_per_image

+                 + (skiprows + row) * bytes_per_row

+                 + (skippixels + column) / 8;

+   }

+   else {

+      /* Non-BITMAP data */

+      GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;

+      GLint topOfImage;

+

+      bytes_per_pixel = _mesa_bytes_per_pixel( format, type );

+

+      /* The pixel type and format should have been error checked earlier */

+      assert(bytes_per_pixel > 0);

+

+      bytes_per_row = pixels_per_row * bytes_per_pixel;

+      remainder = bytes_per_row % alignment;

+      if (remainder > 0)

+         bytes_per_row += (alignment - remainder);

+

+      ASSERT(bytes_per_row % alignment == 0);

+

+      bytes_per_image = bytes_per_row * rows_per_image;

+

+      if (packing->Invert) {

+         /* set pixel_addr to the last row */

+         topOfImage = bytes_per_row * (height - 1);

+         bytes_per_row = -bytes_per_row;

+      }

+      else {

+         topOfImage = 0;

+      }

+

+      /* compute final pixel address */

+      pixel_addr = (GLubyte *) image

+                 + (skipimages + img) * bytes_per_image

+                 + topOfImage

+                 + (skiprows + row) * bytes_per_row

+                 + (skippixels + column) * bytes_per_pixel;

+   }

+

+   return (GLvoid *) pixel_addr;

+}

+

+

+GLvoid *

+_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,

+                       const GLvoid *image,

+                       GLsizei width,

+                       GLenum format, GLenum type,

+                       GLint column )

+{

+   return _mesa_image_address(1, packing, image, width, 1,

+                              format, type, 0, 0, column);

+}

+

+

+GLvoid *

+_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,

+                       const GLvoid *image,

+                       GLsizei width, GLsizei height,

+                       GLenum format, GLenum type,

+                       GLint row, GLint column )

+{

+   return _mesa_image_address(2, packing, image, width, height,

+                              format, type, 0, row, column);

+}

+

+

+GLvoid *

+_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,

+                       const GLvoid *image,

+                       GLsizei width, GLsizei height,

+                       GLenum format, GLenum type,

+                       GLint img, GLint row, GLint column )

+{

+   return _mesa_image_address(3, packing, image, width, height,

+                              format, type, img, row, column);

+}

+

+

+

+/**

+ * Compute the stride (in bytes) between image rows.

+ *

+ * \param packing the pixelstore attributes

+ * \param width image width.

+ * \param format pixel format.

+ * \param type pixel data type.

+ * 

+ * \return the stride in bytes for the given parameters, or -1 if error

+ */

+GLint

+_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,

+                        GLint width, GLenum format, GLenum type )

+{

+   GLint bytesPerRow, remainder;

+

+   ASSERT(packing);

+

+   if (type == GL_BITMAP) {

+      if (packing->RowLength == 0) {

+         bytesPerRow = (width + 7) / 8;

+      }

+      else {

+         bytesPerRow = (packing->RowLength + 7) / 8;

+      }

+   }

+   else {

+      /* Non-BITMAP data */

+      const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);

+      if (bytesPerPixel <= 0)

+         return -1;  /* error */

+      if (packing->RowLength == 0) {

+         bytesPerRow = bytesPerPixel * width;

+      }

+      else {

+         bytesPerRow = bytesPerPixel * packing->RowLength;

+      }

+   }

+

+   remainder = bytesPerRow % packing->Alignment;

+   if (remainder > 0) {

+      bytesPerRow += (packing->Alignment - remainder);

+   }

+

+   if (packing->Invert) {

+      /* negate the bytes per row (negative row stride) */

+      bytesPerRow = -bytesPerRow;

+   }

+

+   return bytesPerRow;

+}

+

+

+/*

+ * Compute the stride between images in a 3D texture (in bytes) for the given

+ * pixel packing parameters and image width, format and type.

+ */

+GLint

+_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,

+                          GLint width, GLint height,

+                          GLenum format, GLenum type )

+{

+   GLint bytesPerRow, bytesPerImage, remainder;

+

+   ASSERT(packing);

+

+   if (type == GL_BITMAP) {

+      if (packing->RowLength == 0) {

+         bytesPerRow = (width + 7) / 8;

+      }

+      else {

+         bytesPerRow = (packing->RowLength + 7) / 8;

+      }

+   }

+   else {

+      const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);

+

+      if (bytesPerPixel <= 0)

+         return -1;  /* error */

+      if (packing->RowLength == 0) {

+         bytesPerRow = bytesPerPixel * width;

+      }

+      else {

+         bytesPerRow = bytesPerPixel * packing->RowLength;

+      }

+   }

+

+   remainder = bytesPerRow % packing->Alignment;

+   if (remainder > 0)

+      bytesPerRow += (packing->Alignment - remainder);

+

+   if (packing->ImageHeight == 0)

+      bytesPerImage = bytesPerRow * height;

+   else

+      bytesPerImage = bytesPerRow * packing->ImageHeight;

+

+   return bytesPerImage;

+}

+

+

+

+/**

+ * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.

+ * This is typically used to convert a bitmap into a GLubyte/pixel texture.

+ * "On" bits will set texels to \p onValue.

+ * "Off" bits will not modify texels.

+ * \param width  src bitmap width in pixels

+ * \param height  src bitmap height in pixels

+ * \param unpack  bitmap unpacking state

+ * \param bitmap  the src bitmap data

+ * \param destBuffer  start of dest buffer

+ * \param destStride  row stride in dest buffer

+ * \param onValue  if bit is 1, set destBuffer pixel to this value

+ */

+void

+_mesa_expand_bitmap(GLsizei width, GLsizei height,

+                    const struct gl_pixelstore_attrib *unpack,

+                    const GLubyte *bitmap,

+                    GLubyte *destBuffer, GLint destStride,

+                    GLubyte onValue)

+{

+   const GLubyte *srcRow = (const GLubyte *)

+      _mesa_image_address2d(unpack, bitmap, width, height,

+                            GL_COLOR_INDEX, GL_BITMAP, 0, 0);

+   const GLint srcStride = _mesa_image_row_stride(unpack, width,

+                                                  GL_COLOR_INDEX, GL_BITMAP);

+   GLint row, col;

+

+#define SET_PIXEL(COL, ROW) \

+   destBuffer[(ROW) * destStride + (COL)] = onValue;

+

+   for (row = 0; row < height; row++) {

+      const GLubyte *src = srcRow;

+

+      if (unpack->LsbFirst) {

+         /* Lsb first */

+         GLubyte mask = 1U << (unpack->SkipPixels & 0x7);

+         for (col = 0; col < width; col++) {

+

+            if (*src & mask) {

+               SET_PIXEL(col, row);

+            }

+

+            if (mask == 128U) {

+               src++;

+               mask = 1U;

+            }

+            else {

+               mask = mask << 1;

+            }

+         }

+

+         /* get ready for next row */

+         if (mask != 1)

+            src++;

+      }

+      else {

+         /* Msb first */

+         GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);

+         for (col = 0; col < width; col++) {

+

+            if (*src & mask) {

+               SET_PIXEL(col, row);

+            }

+

+            if (mask == 1U) {

+               src++;

+               mask = 128U;

+            }

+            else {

+               mask = mask >> 1;

+            }

+         }

+

+         /* get ready for next row */

+         if (mask != 128)

+            src++;

+      }

+

+      srcRow += srcStride;

+   } /* row */

+

+#undef SET_PIXEL

+}

+

+

+

+

+/**

+ * Convert an array of RGBA colors from one datatype to another.

+ * NOTE: src may equal dst.  In that case, we use a temporary buffer.

+ */

+void

+_mesa_convert_colors(GLenum srcType, const GLvoid *src,

+                     GLenum dstType, GLvoid *dst,

+                     GLuint count, const GLubyte mask[])

+{

+   GLuint tempBuffer[MAX_WIDTH][4];

+   const GLboolean useTemp = (src == dst);

+

+   ASSERT(srcType != dstType);

+

+   switch (srcType) {

+   case GL_UNSIGNED_BYTE:

+      if (dstType == GL_UNSIGNED_SHORT) {

+         const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;

+         GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);

+               dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);

+               dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);

+               dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));

+      }

+      else {

+         const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;

+         GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         ASSERT(dstType == GL_FLOAT);

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);

+               dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);

+               dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);

+               dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));

+      }

+      break;

+   case GL_UNSIGNED_SHORT:

+      if (dstType == GL_UNSIGNED_BYTE) {

+         const GLushort (*src2)[4] = (const GLushort (*)[4]) src;

+         GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);

+               dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);

+               dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);

+               dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));

+      }

+      else {

+         const GLushort (*src2)[4] = (const GLushort (*)[4]) src;

+         GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         ASSERT(dstType == GL_FLOAT);

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);

+               dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);

+               dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);

+               dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));

+      }

+      break;

+   case GL_FLOAT:

+      if (dstType == GL_UNSIGNED_BYTE) {

+         const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;

+         GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);

+               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);

+               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);

+               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));

+      }

+      else {

+         const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;

+         GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);

+         GLuint i;

+         ASSERT(dstType == GL_UNSIGNED_SHORT);

+         for (i = 0; i < count; i++) {

+            if (!mask || mask[i]) {

+               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);

+               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);

+               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);

+               UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);

+            }

+         }

+         if (useTemp)

+            memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));

+      }

+      break;

+   default:

+      _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");

+   }

+}

+

+

+

+

+/**

+ * Perform basic clipping for glDrawPixels.  The image's position and size

+ * and the unpack SkipPixels and SkipRows are adjusted so that the image

+ * region is entirely within the window and scissor bounds.

+ * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).

+ * If Pixel.ZoomY is -1, *destY will be changed to be the first row which

+ * we'll actually write.  Beforehand, *destY-1 is the first drawing row.

+ *

+ * \return  GL_TRUE if image is ready for drawing or

+ *          GL_FALSE if image was completely clipped away (draw nothing)

+ */

+GLboolean

+_mesa_clip_drawpixels(const struct gl_context *ctx,

+                      GLint *destX, GLint *destY,

+                      GLsizei *width, GLsizei *height,

+                      struct gl_pixelstore_attrib *unpack)

+{

+   const struct gl_framebuffer *buffer = ctx->DrawBuffer;

+

+   if (unpack->RowLength == 0) {

+      unpack->RowLength = *width;

+   }

+

+   ASSERT(ctx->Pixel.ZoomX == 1.0F);

+   ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);

+

+   /* left clipping */

+   if (*destX < buffer->_Xmin) {

+      unpack->SkipPixels += (buffer->_Xmin - *destX);

+      *width -= (buffer->_Xmin - *destX);

+      *destX = buffer->_Xmin;

+   }

+   /* right clipping */

+   if (*destX + *width > buffer->_Xmax)

+      *width -= (*destX + *width - buffer->_Xmax);

+

+   if (*width <= 0)

+      return GL_FALSE;

+

+   if (ctx->Pixel.ZoomY == 1.0F) {

+      /* bottom clipping */

+      if (*destY < buffer->_Ymin) {

+         unpack->SkipRows += (buffer->_Ymin - *destY);

+         *height -= (buffer->_Ymin - *destY);

+         *destY = buffer->_Ymin;

+      }

+      /* top clipping */

+      if (*destY + *height > buffer->_Ymax)

+         *height -= (*destY + *height - buffer->_Ymax);

+   }

+   else { /* upside down */

+      /* top clipping */

+      if (*destY > buffer->_Ymax) {

+         unpack->SkipRows += (*destY - buffer->_Ymax);

+         *height -= (*destY - buffer->_Ymax);

+         *destY = buffer->_Ymax;

+      }

+      /* bottom clipping */

+      if (*destY - *height < buffer->_Ymin)

+         *height -= (buffer->_Ymin - (*destY - *height));

+      /* adjust destY so it's the first row to write to */

+      (*destY)--;

+   }

+

+   if (*height <= 0)

+      return GL_FALSE;

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Perform clipping for glReadPixels.  The image's window position

+ * and size, and the pack skipPixels, skipRows and rowLength are adjusted

+ * so that the image region is entirely within the window bounds.

+ * Note: this is different from _mesa_clip_drawpixels() in that the

+ * scissor box is ignored, and we use the bounds of the current readbuffer

+ * surface.

+ *

+ * \return  GL_TRUE if image is ready for drawing or

+ *          GL_FALSE if image was completely clipped away (draw nothing)

+ */

+GLboolean

+_mesa_clip_readpixels(const struct gl_context *ctx,

+                      GLint *srcX, GLint *srcY,

+                      GLsizei *width, GLsizei *height,

+                      struct gl_pixelstore_attrib *pack)

+{

+   const struct gl_framebuffer *buffer = ctx->ReadBuffer;

+

+   if (pack->RowLength == 0) {

+      pack->RowLength = *width;

+   }

+

+   /* left clipping */

+   if (*srcX < 0) {

+      pack->SkipPixels += (0 - *srcX);

+      *width -= (0 - *srcX);

+      *srcX = 0;

+   }

+   /* right clipping */

+   if (*srcX + *width > (GLsizei) buffer->Width)

+      *width -= (*srcX + *width - buffer->Width);

+

+   if (*width <= 0)

+      return GL_FALSE;

+

+   /* bottom clipping */

+   if (*srcY < 0) {

+      pack->SkipRows += (0 - *srcY);

+      *height -= (0 - *srcY);

+      *srcY = 0;

+   }

+   /* top clipping */

+   if (*srcY + *height > (GLsizei) buffer->Height)

+      *height -= (*srcY + *height - buffer->Height);

+

+   if (*height <= 0)

+      return GL_FALSE;

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Do clipping for a glCopyTexSubImage call.

+ * The framebuffer source region might extend outside the framebuffer

+ * bounds.  Clip the source region against the framebuffer bounds and

+ * adjust the texture/dest position and size accordingly.

+ *

+ * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.

+ */

+GLboolean

+_mesa_clip_copytexsubimage(const struct gl_context *ctx,

+                           GLint *destX, GLint *destY,

+                           GLint *srcX, GLint *srcY,

+                           GLsizei *width, GLsizei *height)

+{

+   const struct gl_framebuffer *fb = ctx->ReadBuffer;

+   const GLint srcX0 = *srcX, srcY0 = *srcY;

+

+   if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,

+                            srcX, srcY, width, height)) {

+      *destX = *destX + *srcX - srcX0;

+      *destY = *destY + *srcY - srcY0;

+

+      return GL_TRUE;

+   }

+   else {

+      return GL_FALSE;

+   }

+}

+

+

+

+/**

+ * Clip the rectangle defined by (x, y, width, height) against the bounds

+ * specified by [xmin, xmax) and [ymin, ymax).

+ * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.

+ */

+GLboolean

+_mesa_clip_to_region(GLint xmin, GLint ymin,

+                     GLint xmax, GLint ymax,

+                     GLint *x, GLint *y,

+                     GLsizei *width, GLsizei *height )

+{

+   /* left clipping */

+   if (*x < xmin) {

+      *width -= (xmin - *x);

+      *x = xmin;

+   }

+

+   /* right clipping */

+   if (*x + *width > xmax)

+      *width -= (*x + *width - xmax);

+

+   if (*width <= 0)

+      return GL_FALSE;

+

+   /* bottom (or top) clipping */

+   if (*y < ymin) {

+      *height -= (ymin - *y);

+      *y = ymin;

+   }

+

+   /* top (or bottom) clipping */

+   if (*y + *height > ymax)

+      *height -= (*y + *height - ymax);

+

+   if (*height <= 0)

+      return GL_FALSE;

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Clip dst coords against Xmax (or Ymax).

+ */

+static INLINE void

+clip_right_or_top(GLint *srcX0, GLint *srcX1,

+                  GLint *dstX0, GLint *dstX1,

+                  GLint maxValue)

+{

+   GLfloat t, bias;

+

+   if (*dstX1 > maxValue) {

+      /* X1 outside right edge */

+      ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */

+      t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);

+      /* chop off [t, 1] part */

+      ASSERT(t >= 0.0 && t <= 1.0);

+      *dstX1 = maxValue;

+      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;

+      *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);

+   }

+   else if (*dstX0 > maxValue) {

+      /* X0 outside right edge */

+      ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */

+      t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);

+      /* chop off [t, 1] part */

+      ASSERT(t >= 0.0 && t <= 1.0);

+      *dstX0 = maxValue;

+      bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;

+      *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);

+   }

+}

+

+

+/**

+ * Clip dst coords against Xmin (or Ymin).

+ */

+static INLINE void

+clip_left_or_bottom(GLint *srcX0, GLint *srcX1,

+                    GLint *dstX0, GLint *dstX1,

+                    GLint minValue)

+{

+   GLfloat t, bias;

+

+   if (*dstX0 < minValue) {

+      /* X0 outside left edge */

+      ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */

+      t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);

+      /* chop off [0, t] part */

+      ASSERT(t >= 0.0 && t <= 1.0);

+      *dstX0 = minValue;

+      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */

+      *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);

+   }

+   else if (*dstX1 < minValue) {

+      /* X1 outside left edge */

+      ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */

+      t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);

+      /* chop off [0, t] part */

+      ASSERT(t >= 0.0 && t <= 1.0);

+      *dstX1 = minValue;

+      bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;

+      *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);

+   }

+}

+

+

+/**

+ * Do clipping of blit src/dest rectangles.

+ * The dest rect is clipped against both the buffer bounds and scissor bounds.

+ * The src rect is just clipped against the buffer bounds.

+ *

+ * When either the src or dest rect is clipped, the other is also clipped

+ * proportionately!

+ *

+ * Note that X0 need not be less than X1 (same for Y) for either the source

+ * and dest rects.  That makes the clipping a little trickier.

+ *

+ * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped

+ */

+GLboolean

+_mesa_clip_blit(struct gl_context *ctx,

+                GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,

+                GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)

+{

+   const GLint srcXmin = 0;

+   const GLint srcXmax = ctx->ReadBuffer->Width;

+   const GLint srcYmin = 0;

+   const GLint srcYmax = ctx->ReadBuffer->Height;

+

+   /* these include scissor bounds */

+   const GLint dstXmin = ctx->DrawBuffer->_Xmin;

+   const GLint dstXmax = ctx->DrawBuffer->_Xmax;

+   const GLint dstYmin = ctx->DrawBuffer->_Ymin;

+   const GLint dstYmax = ctx->DrawBuffer->_Ymax;

+

+   /*

+   printf("PreClipX:  src: %d .. %d  dst: %d .. %d\n",

+          *srcX0, *srcX1, *dstX0, *dstX1);

+   printf("PreClipY:  src: %d .. %d  dst: %d .. %d\n",

+          *srcY0, *srcY1, *dstY0, *dstY1);

+   */

+

+   /* trivial rejection tests */

+   if (*dstX0 == *dstX1)

+      return GL_FALSE; /* no width */

+   if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)

+      return GL_FALSE; /* totally out (left) of bounds */

+   if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)

+      return GL_FALSE; /* totally out (right) of bounds */

+

+   if (*dstY0 == *dstY1)

+      return GL_FALSE;

+   if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)

+      return GL_FALSE;

+   if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)

+      return GL_FALSE;

+

+   if (*srcX0 == *srcX1)

+      return GL_FALSE;

+   if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)

+      return GL_FALSE;

+   if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)

+      return GL_FALSE;

+

+   if (*srcY0 == *srcY1)

+      return GL_FALSE;

+   if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)

+      return GL_FALSE;

+   if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)

+      return GL_FALSE;

+

+   /*

+    * dest clip

+    */

+   clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);

+   clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);

+   clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);

+   clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);

+

+   /*

+    * src clip (just swap src/dst values from above)

+    */

+   clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);

+   clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);

+   clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);

+   clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);

+

+   /*

+   printf("PostClipX: src: %d .. %d  dst: %d .. %d\n",

+          *srcX0, *srcX1, *dstX0, *dstX1);

+   printf("PostClipY: src: %d .. %d  dst: %d .. %d\n",

+          *srcY0, *srcY1, *dstY0, *dstY1);

+   */

+

+   ASSERT(*dstX0 >= dstXmin);

+   ASSERT(*dstX0 <= dstXmax);

+   ASSERT(*dstX1 >= dstXmin);

+   ASSERT(*dstX1 <= dstXmax);

+

+   ASSERT(*dstY0 >= dstYmin);

+   ASSERT(*dstY0 <= dstYmax);

+   ASSERT(*dstY1 >= dstYmin);

+   ASSERT(*dstY1 <= dstYmax);

+

+   ASSERT(*srcX0 >= srcXmin);

+   ASSERT(*srcX0 <= srcXmax);

+   ASSERT(*srcX1 >= srcXmin);

+   ASSERT(*srcX1 <= srcXmax);

+

+   ASSERT(*srcY0 >= srcYmin);

+   ASSERT(*srcY0 <= srcYmax);

+   ASSERT(*srcY1 >= srcYmin);

+   ASSERT(*srcY1 <= srcYmax);

+

+   return GL_TRUE;

+}