xserver libX11 Xextproto mesa Git update 28 Feb 2011

1 files changed, 922 insertions, 893 deletions

diff --git a/mesalib/src/mesa/main/texfetch.c b/mesalib/src/mesa/main/texfetch.c
index 1e7ea9480..550597e1c 100644
--- a/mesalib/src/mesa/main/texfetch.c
+++ b/mesalib/src/mesa/main/texfetch.c
@@ -1,893 +1,922 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.7

- *

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

- * Copyright (c) 2009  VMware, Inc.

- *

- * 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 texfetch.c

- *

- * Texel fetch/store functions

- *

- * \author Gareth Hughes

- */

-

-

-#include "colormac.h"

-#include "macros.h"

-#include "texcompress.h"

-#include "texcompress_fxt1.h"

-#include "texcompress_s3tc.h"

-#include "texfetch.h"

-#include "teximage.h"

-

-

-/**

- * Convert an 8-bit sRGB value from non-linear space to a

- * linear RGB value in [0, 1].

- * Implemented with a 256-entry lookup table.

- */

-static INLINE GLfloat

-nonlinear_to_linear(GLubyte cs8)

-{

-   static GLfloat table[256];

-   static GLboolean tableReady = GL_FALSE;

-   if (!tableReady) {

-      /* compute lookup table now */

-      GLuint i;

-      for (i = 0; i < 256; i++) {

-         const GLfloat cs = UBYTE_TO_FLOAT(i);

-         if (cs <= 0.04045) {

-            table[i] = cs / 12.92f;

-         }

-         else {

-            table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);

-         }

-      }

-      tableReady = GL_TRUE;

-   }

-   return table[cs8];

-}

-

-

-

-/* Texel fetch routines for all supported formats

- */

-#define DIM 1

-#include "texfetch_tmp.h"

-

-#define DIM 2

-#include "texfetch_tmp.h"

-

-#define DIM 3

-#include "texfetch_tmp.h"

-

-/**

- * Null texel fetch function.

- *

- * Have to have this so the FetchTexel function pointer is never NULL.

- */

-static void fetch_null_texelf( const struct gl_texture_image *texImage,

-                               GLint i, GLint j, GLint k, GLfloat *texel )

-{

-   (void) texImage; (void) i; (void) j; (void) k;

-   texel[RCOMP] = 0.0;

-   texel[GCOMP] = 0.0;

-   texel[BCOMP] = 0.0;

-   texel[ACOMP] = 0.0;

-   _mesa_warning(NULL, "fetch_null_texelf() called!");

-}

-

-static void store_null_texel(struct gl_texture_image *texImage,

-                             GLint i, GLint j, GLint k, const void *texel)

-{

-   (void) texImage;

-   (void) i;

-   (void) j;

-   (void) k;

-   (void) texel;

-   /* no-op */

-}

-

-

-

-/**

- * Table to map MESA_FORMAT_ to texel fetch/store funcs.

- * XXX this is somewhat temporary.

- */

-static struct {

-   gl_format Name;

-   FetchTexelFuncF Fetch1D;

-   FetchTexelFuncF Fetch2D;

-   FetchTexelFuncF Fetch3D;

-   StoreTexelFunc StoreTexel;

-}

-texfetch_funcs[MESA_FORMAT_COUNT] =

-{

-   {

-      MESA_FORMAT_NONE,

-      fetch_null_texelf,

-      fetch_null_texelf,

-      fetch_null_texelf,

-      store_null_texel

-   },

-

-   {

-      MESA_FORMAT_RGBA8888,

-      fetch_texel_1d_f_rgba8888,

-      fetch_texel_2d_f_rgba8888,

-      fetch_texel_3d_f_rgba8888,

-      store_texel_rgba8888

-   },

-   {

-      MESA_FORMAT_RGBA8888_REV,

-      fetch_texel_1d_f_rgba8888_rev,

-      fetch_texel_2d_f_rgba8888_rev,

-      fetch_texel_3d_f_rgba8888_rev,

-      store_texel_rgba8888_rev

-   },

-   {

-      MESA_FORMAT_ARGB8888,

-      fetch_texel_1d_f_argb8888,

-      fetch_texel_2d_f_argb8888,

-      fetch_texel_3d_f_argb8888,

-      store_texel_argb8888

-   },

-   {

-      MESA_FORMAT_ARGB8888_REV,

-      fetch_texel_1d_f_argb8888_rev,

-      fetch_texel_2d_f_argb8888_rev,

-      fetch_texel_3d_f_argb8888_rev,

-      store_texel_argb8888_rev

-   },

-   {

-      MESA_FORMAT_XRGB8888,

-      fetch_texel_1d_f_xrgb8888,

-      fetch_texel_2d_f_xrgb8888,

-      fetch_texel_3d_f_xrgb8888,

-      store_texel_xrgb8888

-   },

-   {

-      MESA_FORMAT_XRGB8888_REV,

-      fetch_texel_1d_f_xrgb8888_rev,

-      fetch_texel_2d_f_xrgb8888_rev,

-      fetch_texel_3d_f_xrgb8888_rev,

-      store_texel_xrgb8888_rev,

-   },

-   {

-      MESA_FORMAT_RGB888,

-      fetch_texel_1d_f_rgb888,

-      fetch_texel_2d_f_rgb888,

-      fetch_texel_3d_f_rgb888,

-      store_texel_rgb888

-   },

-   {

-      MESA_FORMAT_BGR888,

-      fetch_texel_1d_f_bgr888,

-      fetch_texel_2d_f_bgr888,

-      fetch_texel_3d_f_bgr888,

-      store_texel_bgr888

-   },

-   {

-      MESA_FORMAT_RGB565,

-      fetch_texel_1d_f_rgb565,

-      fetch_texel_2d_f_rgb565,

-      fetch_texel_3d_f_rgb565,

-      store_texel_rgb565

-   },

-   {

-      MESA_FORMAT_RGB565_REV,

-      fetch_texel_1d_f_rgb565_rev,

-      fetch_texel_2d_f_rgb565_rev,

-      fetch_texel_3d_f_rgb565_rev,

-      store_texel_rgb565_rev

-   },

-   {

-      MESA_FORMAT_ARGB4444,

-      fetch_texel_1d_f_argb4444,

-      fetch_texel_2d_f_argb4444,

-      fetch_texel_3d_f_argb4444,

-      store_texel_argb4444

-   },

-   {

-      MESA_FORMAT_ARGB4444_REV,

-      fetch_texel_1d_f_argb4444_rev,

-      fetch_texel_2d_f_argb4444_rev,

-      fetch_texel_3d_f_argb4444_rev,

-      store_texel_argb4444_rev

-   },

-   {

-      MESA_FORMAT_RGBA5551,

-      fetch_texel_1d_f_rgba5551,

-      fetch_texel_2d_f_rgba5551,

-      fetch_texel_3d_f_rgba5551,

-      store_texel_rgba5551

-   },

-   {

-      MESA_FORMAT_ARGB1555,

-      fetch_texel_1d_f_argb1555,

-      fetch_texel_2d_f_argb1555,

-      fetch_texel_3d_f_argb1555,

-      store_texel_argb1555

-   },

-   {

-      MESA_FORMAT_ARGB1555_REV,

-      fetch_texel_1d_f_argb1555_rev,

-      fetch_texel_2d_f_argb1555_rev,

-      fetch_texel_3d_f_argb1555_rev,

-      store_texel_argb1555_rev

-   },

-   {

-      MESA_FORMAT_AL44,

-      fetch_texel_1d_f_al44,

-      fetch_texel_2d_f_al44,

-      fetch_texel_3d_f_al44,

-      store_texel_al44

-   },

-   {

-      MESA_FORMAT_AL88,

-      fetch_texel_1d_f_al88,

-      fetch_texel_2d_f_al88,

-      fetch_texel_3d_f_al88,

-      store_texel_al88

-   },

-   {

-      MESA_FORMAT_AL88_REV,

-      fetch_texel_1d_f_al88_rev,

-      fetch_texel_2d_f_al88_rev,

-      fetch_texel_3d_f_al88_rev,

-      store_texel_al88_rev

-   },

-   {

-      MESA_FORMAT_AL1616,

-      fetch_texel_1d_f_al1616,

-      fetch_texel_2d_f_al1616,

-      fetch_texel_3d_f_al1616,

-      store_texel_al1616

-   },

-   {

-      MESA_FORMAT_AL1616_REV,

-      fetch_texel_1d_f_al1616_rev,

-      fetch_texel_2d_f_al1616_rev,

-      fetch_texel_3d_f_al1616_rev,

-      store_texel_al1616_rev

-   },

-   {

-      MESA_FORMAT_RGB332,

-      fetch_texel_1d_f_rgb332,

-      fetch_texel_2d_f_rgb332,

-      fetch_texel_3d_f_rgb332,

-      store_texel_rgb332

-   },

-   {

-      MESA_FORMAT_A8,

-      fetch_texel_1d_f_a8,

-      fetch_texel_2d_f_a8,

-      fetch_texel_3d_f_a8,

-      store_texel_a8

-   },

-   {

-      MESA_FORMAT_A16,

-      fetch_texel_1d_f_a16,

-      fetch_texel_2d_f_a16,

-      fetch_texel_3d_f_a16,

-      store_texel_a16

-   },

-   {

-      MESA_FORMAT_L8,

-      fetch_texel_1d_f_l8,

-      fetch_texel_2d_f_l8,

-      fetch_texel_3d_f_l8,

-      store_texel_l8

-   },

-   {

-      MESA_FORMAT_L16,

-      fetch_texel_1d_f_l16,

-      fetch_texel_2d_f_l16,

-      fetch_texel_3d_f_l16,

-      store_texel_l16

-   },

-   {

-      MESA_FORMAT_I8,

-      fetch_texel_1d_f_i8,

-      fetch_texel_2d_f_i8,

-      fetch_texel_3d_f_i8,

-      store_texel_i8

-   },

-   {

-      MESA_FORMAT_I16,

-      fetch_texel_1d_f_i16,

-      fetch_texel_2d_f_i16,

-      fetch_texel_3d_f_i16,

-      store_texel_i16

-   },

-   {

-      MESA_FORMAT_CI8,

-      fetch_texel_1d_f_ci8,

-      fetch_texel_2d_f_ci8,

-      fetch_texel_3d_f_ci8,

-      store_texel_ci8

-   },

-   {

-      MESA_FORMAT_YCBCR,

-      fetch_texel_1d_f_ycbcr,

-      fetch_texel_2d_f_ycbcr,

-      fetch_texel_3d_f_ycbcr,

-      store_texel_ycbcr

-   },

-   {

-      MESA_FORMAT_YCBCR_REV,

-      fetch_texel_1d_f_ycbcr_rev,

-      fetch_texel_2d_f_ycbcr_rev,

-      fetch_texel_3d_f_ycbcr_rev,

-      store_texel_ycbcr_rev

-   },

-   {

-      MESA_FORMAT_R8,

-      fetch_texel_1d_f_r8,

-      fetch_texel_2d_f_r8,

-      fetch_texel_3d_f_r8,

-      store_texel_r8,

-   },

-   {

-      MESA_FORMAT_RG88,

-      fetch_texel_1d_f_rg88,

-      fetch_texel_2d_f_rg88,

-      fetch_texel_3d_f_rg88,

-      store_texel_rg88,

-   },

-   {

-      MESA_FORMAT_RG88_REV,

-      fetch_texel_1d_f_rg88_rev,

-      fetch_texel_2d_f_rg88_rev,

-      fetch_texel_3d_f_rg88_rev,

-      store_texel_rg88_rev,

-   },

-   {

-      MESA_FORMAT_R16,

-      fetch_texel_1d_f_r16,

-      fetch_texel_2d_f_r16,

-      fetch_texel_3d_f_r16,

-      store_texel_r16,

-   },

-   {

-      MESA_FORMAT_RG1616,

-      fetch_texel_1d_f_rg1616,

-      fetch_texel_2d_f_rg1616,

-      fetch_texel_3d_f_rg1616,

-      store_texel_rg1616,

-   },

-   {

-      MESA_FORMAT_RG1616_REV,

-      fetch_texel_1d_f_rg1616_rev,

-      fetch_texel_2d_f_rg1616_rev,

-      fetch_texel_3d_f_rg1616_rev,

-      store_texel_rg1616_rev,

-   },

-   {

-      MESA_FORMAT_ARGB2101010,

-      fetch_texel_1d_f_argb2101010,

-      fetch_texel_2d_f_argb2101010,

-      fetch_texel_3d_f_argb2101010,

-      store_texel_argb2101010

-   },

-   {

-      MESA_FORMAT_Z24_S8,

-      fetch_texel_1d_f_z24_s8,

-      fetch_texel_2d_f_z24_s8,

-      fetch_texel_3d_f_z24_s8,

-      store_texel_z24_s8

-   },

-   {

-      MESA_FORMAT_S8_Z24,

-      fetch_texel_1d_f_s8_z24,

-      fetch_texel_2d_f_s8_z24,

-      fetch_texel_3d_f_s8_z24,

-      store_texel_s8_z24

-   },

-   {

-      MESA_FORMAT_Z16,

-      fetch_texel_1d_f_z16,

-      fetch_texel_2d_f_z16,

-      fetch_texel_3d_f_z16,

-      store_texel_z16

-   },

-   {

-      MESA_FORMAT_X8_Z24,

-      fetch_texel_1d_f_s8_z24,

-      fetch_texel_2d_f_s8_z24,

-      fetch_texel_3d_f_s8_z24,

-      store_texel_s8_z24

-   },

-   {

-      MESA_FORMAT_Z24_X8,

-      fetch_texel_1d_f_z24_s8,

-      fetch_texel_2d_f_z24_s8,

-      fetch_texel_3d_f_z24_s8,

-      store_texel_z24_s8

-   },

-   {

-      MESA_FORMAT_Z32,

-      fetch_texel_1d_f_z32,

-      fetch_texel_2d_f_z32,

-      fetch_texel_3d_f_z32,

-      store_texel_z32

-   },

-   {

-      MESA_FORMAT_S8,

-      NULL,

-      NULL,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_SRGB8,

-      fetch_texel_1d_srgb8,

-      fetch_texel_2d_srgb8,

-      fetch_texel_3d_srgb8,

-      store_texel_srgb8

-   },

-   {

-      MESA_FORMAT_SRGBA8,

-      fetch_texel_1d_srgba8,

-      fetch_texel_2d_srgba8,

-      fetch_texel_3d_srgba8,

-      store_texel_srgba8

-   },

-   {

-      MESA_FORMAT_SARGB8,

-      fetch_texel_1d_sargb8,

-      fetch_texel_2d_sargb8,

-      fetch_texel_3d_sargb8,

-      store_texel_sargb8

-   },

-   {

-      MESA_FORMAT_SL8,

-      fetch_texel_1d_sl8,

-      fetch_texel_2d_sl8,

-      fetch_texel_3d_sl8,

-      store_texel_sl8

-   },

-   {

-      MESA_FORMAT_SLA8,

-      fetch_texel_1d_sla8,

-      fetch_texel_2d_sla8,

-      fetch_texel_3d_sla8,

-      store_texel_sla8

-   },

-   {

-      MESA_FORMAT_SRGB_DXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_srgb_dxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_SRGBA_DXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_srgba_dxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_SRGBA_DXT3,

-      NULL,

-      _mesa_fetch_texel_2d_f_srgba_dxt3,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_SRGBA_DXT5,

-      NULL,

-      _mesa_fetch_texel_2d_f_srgba_dxt5,

-      NULL,

-      NULL

-   },

-

-   {

-      MESA_FORMAT_RGB_FXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgb_fxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGBA_FXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgba_fxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGB_DXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgb_dxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGBA_DXT1,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgba_dxt1,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGBA_DXT3,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgba_dxt3,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGBA_DXT5,

-      NULL,

-      _mesa_fetch_texel_2d_f_rgba_dxt5,

-      NULL,

-      NULL

-   },

-   {

-      MESA_FORMAT_RGBA_FLOAT32,

-      fetch_texel_1d_f_rgba_f32,

-      fetch_texel_2d_f_rgba_f32,

-      fetch_texel_3d_f_rgba_f32,

-      store_texel_rgba_f32

-   },

-   {

-      MESA_FORMAT_RGBA_FLOAT16,

-      fetch_texel_1d_f_rgba_f16,

-      fetch_texel_2d_f_rgba_f16,

-      fetch_texel_3d_f_rgba_f16,

-      store_texel_rgba_f16

-   },

-   {

-      MESA_FORMAT_RGB_FLOAT32,

-      fetch_texel_1d_f_rgb_f32,

-      fetch_texel_2d_f_rgb_f32,

-      fetch_texel_3d_f_rgb_f32,

-      store_texel_rgb_f32

-   },

-   {

-      MESA_FORMAT_RGB_FLOAT16,

-      fetch_texel_1d_f_rgb_f16,

-      fetch_texel_2d_f_rgb_f16,

-      fetch_texel_3d_f_rgb_f16,

-      store_texel_rgb_f16

-   },

-   {

-      MESA_FORMAT_ALPHA_FLOAT32,

-      fetch_texel_1d_f_alpha_f32,

-      fetch_texel_2d_f_alpha_f32,

-      fetch_texel_3d_f_alpha_f32,

-      store_texel_alpha_f32

-   },

-   {

-      MESA_FORMAT_ALPHA_FLOAT16,

-      fetch_texel_1d_f_alpha_f16,

-      fetch_texel_2d_f_alpha_f16,

-      fetch_texel_3d_f_alpha_f16,

-      store_texel_alpha_f16

-   },

-   {

-      MESA_FORMAT_LUMINANCE_FLOAT32,

-      fetch_texel_1d_f_luminance_f32,

-      fetch_texel_2d_f_luminance_f32,

-      fetch_texel_3d_f_luminance_f32,

-      store_texel_luminance_f32

-   },

-   {

-      MESA_FORMAT_LUMINANCE_FLOAT16,

-      fetch_texel_1d_f_luminance_f16,

-      fetch_texel_2d_f_luminance_f16,

-      fetch_texel_3d_f_luminance_f16,

-      store_texel_luminance_f16

-   },

-   {

-      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,

-      fetch_texel_1d_f_luminance_alpha_f32,

-      fetch_texel_2d_f_luminance_alpha_f32,

-      fetch_texel_3d_f_luminance_alpha_f32,

-      store_texel_luminance_alpha_f32

-   },

-   {

-      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,

-      fetch_texel_1d_f_luminance_alpha_f16,

-      fetch_texel_2d_f_luminance_alpha_f16,

-      fetch_texel_3d_f_luminance_alpha_f16,

-      store_texel_luminance_alpha_f16

-   },

-   {

-      MESA_FORMAT_INTENSITY_FLOAT32,

-      fetch_texel_1d_f_intensity_f32,

-      fetch_texel_2d_f_intensity_f32,

-      fetch_texel_3d_f_intensity_f32,

-      store_texel_intensity_f32

-   },

-   {

-      MESA_FORMAT_INTENSITY_FLOAT16,

-      fetch_texel_1d_f_intensity_f16,

-      fetch_texel_2d_f_intensity_f16,

-      fetch_texel_3d_f_intensity_f16,

-      store_texel_intensity_f16

-   },

-

-   /* non-normalized, signed int */

-   {

-      MESA_FORMAT_RGBA_INT8,

-      fetch_texel_1d_rgba_int8,

-      fetch_texel_2d_rgba_int8,

-      fetch_texel_3d_rgba_int8,

-      store_texel_rgba_int8

-   },

-   {

-      MESA_FORMAT_RGBA_INT16,

-      fetch_texel_1d_rgba_int16,

-      fetch_texel_2d_rgba_int16,

-      fetch_texel_3d_rgba_int16,

-      store_texel_rgba_int16

-   },

-   {

-      MESA_FORMAT_RGBA_INT32,

-      fetch_texel_1d_rgba_int32,

-      fetch_texel_2d_rgba_int32,

-      fetch_texel_3d_rgba_int32,

-      store_texel_rgba_int32

-   },

-

-   /* non-normalized, unsigned int */

-   {

-      MESA_FORMAT_RGBA_UINT8,

-      fetch_texel_1d_rgba_uint8,

-      fetch_texel_2d_rgba_uint8,

-      fetch_texel_3d_rgba_uint8,

-      store_texel_rgba_uint8

-   },

-   {

-      MESA_FORMAT_RGBA_UINT16,

-      fetch_texel_1d_rgba_uint16,

-      fetch_texel_2d_rgba_uint16,

-      fetch_texel_3d_rgba_uint16,

-      store_texel_rgba_uint16

-   },

-   {

-      MESA_FORMAT_RGBA_UINT32,

-      fetch_texel_1d_rgba_uint32,

-      fetch_texel_2d_rgba_uint32,

-      fetch_texel_3d_rgba_uint32,

-      store_texel_rgba_uint32

-   },

-

-   /* dudv */

-   {

-      MESA_FORMAT_DUDV8,

-      fetch_texel_1d_dudv8,

-      fetch_texel_2d_dudv8,

-      fetch_texel_3d_dudv8,

-      NULL

-   },

-

-   /* signed, normalized */

-   {

-      MESA_FORMAT_SIGNED_R8,

-      fetch_texel_1d_signed_r8,

-      fetch_texel_2d_signed_r8,

-      fetch_texel_3d_signed_r8,

-      store_texel_signed_r8

-   },

-   {

-      MESA_FORMAT_SIGNED_RG88,

-      fetch_texel_1d_signed_rg88,

-      fetch_texel_2d_signed_rg88,

-      fetch_texel_3d_signed_rg88,

-      store_texel_signed_rg88

-   },

-   {

-      MESA_FORMAT_SIGNED_RGBX8888,

-      fetch_texel_1d_signed_rgbx8888,

-      fetch_texel_2d_signed_rgbx8888,

-      fetch_texel_3d_signed_rgbx8888,

-      store_texel_signed_rgbx8888

-   },

-   {

-      MESA_FORMAT_SIGNED_RGBA8888,

-      fetch_texel_1d_signed_rgba8888,

-      fetch_texel_2d_signed_rgba8888,

-      fetch_texel_3d_signed_rgba8888,

-      store_texel_signed_rgba8888

-   },

-   {

-      MESA_FORMAT_SIGNED_RGBA8888_REV,

-      fetch_texel_1d_signed_rgba8888_rev,

-      fetch_texel_2d_signed_rgba8888_rev,

-      fetch_texel_3d_signed_rgba8888_rev,

-      store_texel_signed_rgba8888_rev

-   },

-   {

-      MESA_FORMAT_SIGNED_R_16,

-      fetch_texel_1d_signed_r_16,

-      fetch_texel_2d_signed_r_16,

-      fetch_texel_3d_signed_r_16,

-      store_texel_signed_r_16

-   },

-   {

-      MESA_FORMAT_SIGNED_RG_16,

-      fetch_texel_1d_signed_rg_16,

-      fetch_texel_2d_signed_rg_16,

-      fetch_texel_3d_signed_rg_16,

-      store_texel_signed_rg_16

-   },

-   {

-      MESA_FORMAT_SIGNED_RGB_16,

-      fetch_texel_1d_signed_rgb_16,

-      fetch_texel_2d_signed_rgb_16,

-      fetch_texel_3d_signed_rgb_16,

-      store_texel_signed_rgb_16

-   },

-   {

-      MESA_FORMAT_SIGNED_RGBA_16,

-      fetch_texel_1d_signed_rgba_16,

-      fetch_texel_2d_signed_rgba_16,

-      fetch_texel_3d_signed_rgba_16,

-      store_texel_signed_rgba_16

-   },

-   {

-      MESA_FORMAT_RGBA_16,

-      fetch_texel_1d_rgba_16,

-      fetch_texel_2d_rgba_16,

-      fetch_texel_3d_rgba_16,

-      store_texel_rgba_16

-   }

-};

-

-

-FetchTexelFuncF

-_mesa_get_texel_fetch_func(gl_format format, GLuint dims)

-{

-#ifdef DEBUG

-   /* check that the table entries are sorted by format name */

-   gl_format fmt;

-   for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {

-      assert(texfetch_funcs[fmt].Name == fmt);

-   }

-#endif

-

-   assert(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);

-   assert(format < MESA_FORMAT_COUNT);

-

-   switch (dims) {

-   case 1:

-      return texfetch_funcs[format].Fetch1D;

-   case 2:

-      return texfetch_funcs[format].Fetch2D;

-   case 3:

-      return texfetch_funcs[format].Fetch3D;

-   default:

-      assert(0 && "bad dims in _mesa_get_texel_fetch_func");

-      return NULL;

-   }

-}

-

-

-StoreTexelFunc

-_mesa_get_texel_store_func(gl_format format)

-{

-   assert(format < MESA_FORMAT_COUNT);

-   return texfetch_funcs[format].StoreTexel;

-}

-

-

-/**

- * Adaptor for fetching a GLchan texel from a float-valued texture.

- */

-static void

-fetch_texel_float_to_chan(const struct gl_texture_image *texImage,

-                          GLint i, GLint j, GLint k, GLchan *texelOut)

-{

-   GLfloat temp[4];

-   GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat);

-

-   ASSERT(texImage->FetchTexelf);

-   texImage->FetchTexelf(texImage, i, j, k, temp);

-   if (baseFormat == GL_DEPTH_COMPONENT ||

-       baseFormat == GL_DEPTH_STENCIL_EXT) {

-      /* just one channel */

-      UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]);

-   }

-   else {

-      /* four channels */

-      UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]);

-      UNCLAMPED_FLOAT_TO_CHAN(texelOut[1], temp[1]);

-      UNCLAMPED_FLOAT_TO_CHAN(texelOut[2], temp[2]);

-      UNCLAMPED_FLOAT_TO_CHAN(texelOut[3], temp[3]);

-   }

-}

-

-

-#if 0

-/**

- * Adaptor for fetching a float texel from a GLchan-valued texture.

- */

-static void

-fetch_texel_chan_to_float(const struct gl_texture_image *texImage,

-                          GLint i, GLint j, GLint k, GLfloat *texelOut)

-{

-   GLchan temp[4];

-   GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat);

-

-   ASSERT(texImage->FetchTexelc);

-   texImage->FetchTexelc(texImage, i, j, k, temp);

-   if (baseFormat == GL_DEPTH_COMPONENT ||

-       baseFormat == GL_DEPTH_STENCIL_EXT) {

-      /* just one channel */

-      texelOut[0] = CHAN_TO_FLOAT(temp[0]);

-   }

-   else {

-      /* four channels */

-      texelOut[0] = CHAN_TO_FLOAT(temp[0]);

-      texelOut[1] = CHAN_TO_FLOAT(temp[1]);

-      texelOut[2] = CHAN_TO_FLOAT(temp[2]);

-      texelOut[3] = CHAN_TO_FLOAT(temp[3]);

-   }

-}

-#endif

-

-

-/**

- * Initialize the texture image's FetchTexelc and FetchTexelf methods.

- */

-void

-_mesa_set_fetch_functions(struct gl_texture_image *texImage, GLuint dims)

-{

-   gl_format format = texImage->TexFormat;

-

-   ASSERT(dims == 1 || dims == 2 || dims == 3);

-

-   if (texImage->TexObject->sRGBDecode == GL_SKIP_DECODE_EXT &&

-       _mesa_get_format_color_encoding(format) == GL_SRGB) {

-      format = _mesa_get_srgb_format_linear(format);

-   }

-

-   texImage->FetchTexelf = _mesa_get_texel_fetch_func(format, dims);

-

-   texImage->FetchTexelc = fetch_texel_float_to_chan;

-

-   ASSERT(texImage->FetchTexelc);

-   ASSERT(texImage->FetchTexelf);

-}

-

-void

-_mesa_update_fetch_functions(struct gl_texture_object *texObj)

-{

-   GLuint face, i;

-   GLuint dims;

-

-   dims = _mesa_get_texture_dimensions(texObj->Target);

-

-   for (face = 0; face < 6; face++) {

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

-         if (texObj->Image[face][i]) {

-	    _mesa_set_fetch_functions(texObj->Image[face][i], dims);

-         }

-      }

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.7
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2009  VMware, Inc.
+ *
+ * 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 texfetch.c
+ *
+ * Texel fetch/store functions
+ *
+ * \author Gareth Hughes
+ */
+
+
+#include "colormac.h"
+#include "macros.h"
+#include "texcompress.h"
+#include "texcompress_fxt1.h"
+#include "texcompress_s3tc.h"
+#include "texcompress_rgtc.h"
+#include "texfetch.h"
+#include "teximage.h"
+
+
+/**
+ * Convert an 8-bit sRGB value from non-linear space to a
+ * linear RGB value in [0, 1].
+ * Implemented with a 256-entry lookup table.
+ */
+static INLINE GLfloat
+nonlinear_to_linear(GLubyte cs8)
+{
+   static GLfloat table[256];
+   static GLboolean tableReady = GL_FALSE;
+   if (!tableReady) {
+      /* compute lookup table now */
+      GLuint i;
+      for (i = 0; i < 256; i++) {
+         const GLfloat cs = UBYTE_TO_FLOAT(i);
+         if (cs <= 0.04045) {
+            table[i] = cs / 12.92f;
+         }
+         else {
+            table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
+         }
+      }
+      tableReady = GL_TRUE;
+   }
+   return table[cs8];
+}
+
+
+
+/* Texel fetch routines for all supported formats
+ */
+#define DIM 1
+#include "texfetch_tmp.h"
+
+#define DIM 2
+#include "texfetch_tmp.h"
+
+#define DIM 3
+#include "texfetch_tmp.h"
+
+/**
+ * Null texel fetch function.
+ *
+ * Have to have this so the FetchTexel function pointer is never NULL.
+ */
+static void fetch_null_texelf( const struct gl_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   (void) texImage; (void) i; (void) j; (void) k;
+   texel[RCOMP] = 0.0;
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 0.0;
+   _mesa_warning(NULL, "fetch_null_texelf() called!");
+}
+
+static void store_null_texel(struct gl_texture_image *texImage,
+                             GLint i, GLint j, GLint k, const void *texel)
+{
+   (void) texImage;
+   (void) i;
+   (void) j;
+   (void) k;
+   (void) texel;
+   /* no-op */
+}
+
+
+
+/**
+ * Table to map MESA_FORMAT_ to texel fetch/store funcs.
+ * XXX this is somewhat temporary.
+ */
+static struct {
+   gl_format Name;
+   FetchTexelFuncF Fetch1D;
+   FetchTexelFuncF Fetch2D;
+   FetchTexelFuncF Fetch3D;
+   StoreTexelFunc StoreTexel;
+}
+texfetch_funcs[MESA_FORMAT_COUNT] =
+{
+   {
+      MESA_FORMAT_NONE,
+      fetch_null_texelf,
+      fetch_null_texelf,
+      fetch_null_texelf,
+      store_null_texel
+   },
+
+   {
+      MESA_FORMAT_RGBA8888,
+      fetch_texel_1d_f_rgba8888,
+      fetch_texel_2d_f_rgba8888,
+      fetch_texel_3d_f_rgba8888,
+      store_texel_rgba8888
+   },
+   {
+      MESA_FORMAT_RGBA8888_REV,
+      fetch_texel_1d_f_rgba8888_rev,
+      fetch_texel_2d_f_rgba8888_rev,
+      fetch_texel_3d_f_rgba8888_rev,
+      store_texel_rgba8888_rev
+   },
+   {
+      MESA_FORMAT_ARGB8888,
+      fetch_texel_1d_f_argb8888,
+      fetch_texel_2d_f_argb8888,
+      fetch_texel_3d_f_argb8888,
+      store_texel_argb8888
+   },
+   {
+      MESA_FORMAT_ARGB8888_REV,
+      fetch_texel_1d_f_argb8888_rev,
+      fetch_texel_2d_f_argb8888_rev,
+      fetch_texel_3d_f_argb8888_rev,
+      store_texel_argb8888_rev
+   },
+   {
+      MESA_FORMAT_XRGB8888,
+      fetch_texel_1d_f_xrgb8888,
+      fetch_texel_2d_f_xrgb8888,
+      fetch_texel_3d_f_xrgb8888,
+      store_texel_xrgb8888
+   },
+   {
+      MESA_FORMAT_XRGB8888_REV,
+      fetch_texel_1d_f_xrgb8888_rev,
+      fetch_texel_2d_f_xrgb8888_rev,
+      fetch_texel_3d_f_xrgb8888_rev,
+      store_texel_xrgb8888_rev,
+   },
+   {
+      MESA_FORMAT_RGB888,
+      fetch_texel_1d_f_rgb888,
+      fetch_texel_2d_f_rgb888,
+      fetch_texel_3d_f_rgb888,
+      store_texel_rgb888
+   },
+   {
+      MESA_FORMAT_BGR888,
+      fetch_texel_1d_f_bgr888,
+      fetch_texel_2d_f_bgr888,
+      fetch_texel_3d_f_bgr888,
+      store_texel_bgr888
+   },
+   {
+      MESA_FORMAT_RGB565,
+      fetch_texel_1d_f_rgb565,
+      fetch_texel_2d_f_rgb565,
+      fetch_texel_3d_f_rgb565,
+      store_texel_rgb565
+   },
+   {
+      MESA_FORMAT_RGB565_REV,
+      fetch_texel_1d_f_rgb565_rev,
+      fetch_texel_2d_f_rgb565_rev,
+      fetch_texel_3d_f_rgb565_rev,
+      store_texel_rgb565_rev
+   },
+   {
+      MESA_FORMAT_ARGB4444,
+      fetch_texel_1d_f_argb4444,
+      fetch_texel_2d_f_argb4444,
+      fetch_texel_3d_f_argb4444,
+      store_texel_argb4444
+   },
+   {
+      MESA_FORMAT_ARGB4444_REV,
+      fetch_texel_1d_f_argb4444_rev,
+      fetch_texel_2d_f_argb4444_rev,
+      fetch_texel_3d_f_argb4444_rev,
+      store_texel_argb4444_rev
+   },
+   {
+      MESA_FORMAT_RGBA5551,
+      fetch_texel_1d_f_rgba5551,
+      fetch_texel_2d_f_rgba5551,
+      fetch_texel_3d_f_rgba5551,
+      store_texel_rgba5551
+   },
+   {
+      MESA_FORMAT_ARGB1555,
+      fetch_texel_1d_f_argb1555,
+      fetch_texel_2d_f_argb1555,
+      fetch_texel_3d_f_argb1555,
+      store_texel_argb1555
+   },
+   {
+      MESA_FORMAT_ARGB1555_REV,
+      fetch_texel_1d_f_argb1555_rev,
+      fetch_texel_2d_f_argb1555_rev,
+      fetch_texel_3d_f_argb1555_rev,
+      store_texel_argb1555_rev
+   },
+   {
+      MESA_FORMAT_AL44,
+      fetch_texel_1d_f_al44,
+      fetch_texel_2d_f_al44,
+      fetch_texel_3d_f_al44,
+      store_texel_al44
+   },
+   {
+      MESA_FORMAT_AL88,
+      fetch_texel_1d_f_al88,
+      fetch_texel_2d_f_al88,
+      fetch_texel_3d_f_al88,
+      store_texel_al88
+   },
+   {
+      MESA_FORMAT_AL88_REV,
+      fetch_texel_1d_f_al88_rev,
+      fetch_texel_2d_f_al88_rev,
+      fetch_texel_3d_f_al88_rev,
+      store_texel_al88_rev
+   },
+   {
+      MESA_FORMAT_AL1616,
+      fetch_texel_1d_f_al1616,
+      fetch_texel_2d_f_al1616,
+      fetch_texel_3d_f_al1616,
+      store_texel_al1616
+   },
+   {
+      MESA_FORMAT_AL1616_REV,
+      fetch_texel_1d_f_al1616_rev,
+      fetch_texel_2d_f_al1616_rev,
+      fetch_texel_3d_f_al1616_rev,
+      store_texel_al1616_rev
+   },
+   {
+      MESA_FORMAT_RGB332,
+      fetch_texel_1d_f_rgb332,
+      fetch_texel_2d_f_rgb332,
+      fetch_texel_3d_f_rgb332,
+      store_texel_rgb332
+   },
+   {
+      MESA_FORMAT_A8,
+      fetch_texel_1d_f_a8,
+      fetch_texel_2d_f_a8,
+      fetch_texel_3d_f_a8,
+      store_texel_a8
+   },
+   {
+      MESA_FORMAT_A16,
+      fetch_texel_1d_f_a16,
+      fetch_texel_2d_f_a16,
+      fetch_texel_3d_f_a16,
+      store_texel_a16
+   },
+   {
+      MESA_FORMAT_L8,
+      fetch_texel_1d_f_l8,
+      fetch_texel_2d_f_l8,
+      fetch_texel_3d_f_l8,
+      store_texel_l8
+   },
+   {
+      MESA_FORMAT_L16,
+      fetch_texel_1d_f_l16,
+      fetch_texel_2d_f_l16,
+      fetch_texel_3d_f_l16,
+      store_texel_l16
+   },
+   {
+      MESA_FORMAT_I8,
+      fetch_texel_1d_f_i8,
+      fetch_texel_2d_f_i8,
+      fetch_texel_3d_f_i8,
+      store_texel_i8
+   },
+   {
+      MESA_FORMAT_I16,
+      fetch_texel_1d_f_i16,
+      fetch_texel_2d_f_i16,
+      fetch_texel_3d_f_i16,
+      store_texel_i16
+   },
+   {
+      MESA_FORMAT_CI8,
+      fetch_texel_1d_f_ci8,
+      fetch_texel_2d_f_ci8,
+      fetch_texel_3d_f_ci8,
+      store_texel_ci8
+   },
+   {
+      MESA_FORMAT_YCBCR,
+      fetch_texel_1d_f_ycbcr,
+      fetch_texel_2d_f_ycbcr,
+      fetch_texel_3d_f_ycbcr,
+      store_texel_ycbcr
+   },
+   {
+      MESA_FORMAT_YCBCR_REV,
+      fetch_texel_1d_f_ycbcr_rev,
+      fetch_texel_2d_f_ycbcr_rev,
+      fetch_texel_3d_f_ycbcr_rev,
+      store_texel_ycbcr_rev
+   },
+   {
+      MESA_FORMAT_R8,
+      fetch_texel_1d_f_r8,
+      fetch_texel_2d_f_r8,
+      fetch_texel_3d_f_r8,
+      store_texel_r8,
+   },
+   {
+      MESA_FORMAT_RG88,
+      fetch_texel_1d_f_rg88,
+      fetch_texel_2d_f_rg88,
+      fetch_texel_3d_f_rg88,
+      store_texel_rg88,
+   },
+   {
+      MESA_FORMAT_RG88_REV,
+      fetch_texel_1d_f_rg88_rev,
+      fetch_texel_2d_f_rg88_rev,
+      fetch_texel_3d_f_rg88_rev,
+      store_texel_rg88_rev,
+   },
+   {
+      MESA_FORMAT_R16,
+      fetch_texel_1d_f_r16,
+      fetch_texel_2d_f_r16,
+      fetch_texel_3d_f_r16,
+      store_texel_r16,
+   },
+   {
+      MESA_FORMAT_RG1616,
+      fetch_texel_1d_f_rg1616,
+      fetch_texel_2d_f_rg1616,
+      fetch_texel_3d_f_rg1616,
+      store_texel_rg1616,
+   },
+   {
+      MESA_FORMAT_RG1616_REV,
+      fetch_texel_1d_f_rg1616_rev,
+      fetch_texel_2d_f_rg1616_rev,
+      fetch_texel_3d_f_rg1616_rev,
+      store_texel_rg1616_rev,
+   },
+   {
+      MESA_FORMAT_ARGB2101010,
+      fetch_texel_1d_f_argb2101010,
+      fetch_texel_2d_f_argb2101010,
+      fetch_texel_3d_f_argb2101010,
+      store_texel_argb2101010
+   },
+   {
+      MESA_FORMAT_Z24_S8,
+      fetch_texel_1d_f_z24_s8,
+      fetch_texel_2d_f_z24_s8,
+      fetch_texel_3d_f_z24_s8,
+      store_texel_z24_s8
+   },
+   {
+      MESA_FORMAT_S8_Z24,
+      fetch_texel_1d_f_s8_z24,
+      fetch_texel_2d_f_s8_z24,
+      fetch_texel_3d_f_s8_z24,
+      store_texel_s8_z24
+   },
+   {
+      MESA_FORMAT_Z16,
+      fetch_texel_1d_f_z16,
+      fetch_texel_2d_f_z16,
+      fetch_texel_3d_f_z16,
+      store_texel_z16
+   },
+   {
+      MESA_FORMAT_X8_Z24,
+      fetch_texel_1d_f_s8_z24,
+      fetch_texel_2d_f_s8_z24,
+      fetch_texel_3d_f_s8_z24,
+      store_texel_s8_z24
+   },
+   {
+      MESA_FORMAT_Z24_X8,
+      fetch_texel_1d_f_z24_s8,
+      fetch_texel_2d_f_z24_s8,
+      fetch_texel_3d_f_z24_s8,
+      store_texel_z24_s8
+   },
+   {
+      MESA_FORMAT_Z32,
+      fetch_texel_1d_f_z32,
+      fetch_texel_2d_f_z32,
+      fetch_texel_3d_f_z32,
+      store_texel_z32
+   },
+   {
+      MESA_FORMAT_S8,
+      NULL,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SRGB8,
+      fetch_texel_1d_srgb8,
+      fetch_texel_2d_srgb8,
+      fetch_texel_3d_srgb8,
+      store_texel_srgb8
+   },
+   {
+      MESA_FORMAT_SRGBA8,
+      fetch_texel_1d_srgba8,
+      fetch_texel_2d_srgba8,
+      fetch_texel_3d_srgba8,
+      store_texel_srgba8
+   },
+   {
+      MESA_FORMAT_SARGB8,
+      fetch_texel_1d_sargb8,
+      fetch_texel_2d_sargb8,
+      fetch_texel_3d_sargb8,
+      store_texel_sargb8
+   },
+   {
+      MESA_FORMAT_SL8,
+      fetch_texel_1d_sl8,
+      fetch_texel_2d_sl8,
+      fetch_texel_3d_sl8,
+      store_texel_sl8
+   },
+   {
+      MESA_FORMAT_SLA8,
+      fetch_texel_1d_sla8,
+      fetch_texel_2d_sla8,
+      fetch_texel_3d_sla8,
+      store_texel_sla8
+   },
+   {
+      MESA_FORMAT_SRGB_DXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_srgb_dxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_srgba_dxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT3,
+      NULL,
+      _mesa_fetch_texel_2d_f_srgba_dxt3,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT5,
+      NULL,
+      _mesa_fetch_texel_2d_f_srgba_dxt5,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_RGB_FXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgb_fxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_FXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgba_fxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_DXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgb_dxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_DXT1,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgba_dxt1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_DXT3,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgba_dxt3,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_DXT5,
+      NULL,
+      _mesa_fetch_texel_2d_f_rgba_dxt5,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_FLOAT32,
+      fetch_texel_1d_f_rgba_f32,
+      fetch_texel_2d_f_rgba_f32,
+      fetch_texel_3d_f_rgba_f32,
+      store_texel_rgba_f32
+   },
+   {
+      MESA_FORMAT_RGBA_FLOAT16,
+      fetch_texel_1d_f_rgba_f16,
+      fetch_texel_2d_f_rgba_f16,
+      fetch_texel_3d_f_rgba_f16,
+      store_texel_rgba_f16
+   },
+   {
+      MESA_FORMAT_RGB_FLOAT32,
+      fetch_texel_1d_f_rgb_f32,
+      fetch_texel_2d_f_rgb_f32,
+      fetch_texel_3d_f_rgb_f32,
+      store_texel_rgb_f32
+   },
+   {
+      MESA_FORMAT_RGB_FLOAT16,
+      fetch_texel_1d_f_rgb_f16,
+      fetch_texel_2d_f_rgb_f16,
+      fetch_texel_3d_f_rgb_f16,
+      store_texel_rgb_f16
+   },
+   {
+      MESA_FORMAT_ALPHA_FLOAT32,
+      fetch_texel_1d_f_alpha_f32,
+      fetch_texel_2d_f_alpha_f32,
+      fetch_texel_3d_f_alpha_f32,
+      store_texel_alpha_f32
+   },
+   {
+      MESA_FORMAT_ALPHA_FLOAT16,
+      fetch_texel_1d_f_alpha_f16,
+      fetch_texel_2d_f_alpha_f16,
+      fetch_texel_3d_f_alpha_f16,
+      store_texel_alpha_f16
+   },
+   {
+      MESA_FORMAT_LUMINANCE_FLOAT32,
+      fetch_texel_1d_f_luminance_f32,
+      fetch_texel_2d_f_luminance_f32,
+      fetch_texel_3d_f_luminance_f32,
+      store_texel_luminance_f32
+   },
+   {
+      MESA_FORMAT_LUMINANCE_FLOAT16,
+      fetch_texel_1d_f_luminance_f16,
+      fetch_texel_2d_f_luminance_f16,
+      fetch_texel_3d_f_luminance_f16,
+      store_texel_luminance_f16
+   },
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
+      fetch_texel_1d_f_luminance_alpha_f32,
+      fetch_texel_2d_f_luminance_alpha_f32,
+      fetch_texel_3d_f_luminance_alpha_f32,
+      store_texel_luminance_alpha_f32
+   },
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
+      fetch_texel_1d_f_luminance_alpha_f16,
+      fetch_texel_2d_f_luminance_alpha_f16,
+      fetch_texel_3d_f_luminance_alpha_f16,
+      store_texel_luminance_alpha_f16
+   },
+   {
+      MESA_FORMAT_INTENSITY_FLOAT32,
+      fetch_texel_1d_f_intensity_f32,
+      fetch_texel_2d_f_intensity_f32,
+      fetch_texel_3d_f_intensity_f32,
+      store_texel_intensity_f32
+   },
+   {
+      MESA_FORMAT_INTENSITY_FLOAT16,
+      fetch_texel_1d_f_intensity_f16,
+      fetch_texel_2d_f_intensity_f16,
+      fetch_texel_3d_f_intensity_f16,
+      store_texel_intensity_f16
+   },
+
+   /* non-normalized, signed int */
+   {
+      MESA_FORMAT_RGBA_INT8,
+      fetch_texel_1d_rgba_int8,
+      fetch_texel_2d_rgba_int8,
+      fetch_texel_3d_rgba_int8,
+      store_texel_rgba_int8
+   },
+   {
+      MESA_FORMAT_RGBA_INT16,
+      fetch_texel_1d_rgba_int16,
+      fetch_texel_2d_rgba_int16,
+      fetch_texel_3d_rgba_int16,
+      store_texel_rgba_int16
+   },
+   {
+      MESA_FORMAT_RGBA_INT32,
+      fetch_texel_1d_rgba_int32,
+      fetch_texel_2d_rgba_int32,
+      fetch_texel_3d_rgba_int32,
+      store_texel_rgba_int32
+   },
+
+   /* non-normalized, unsigned int */
+   {
+      MESA_FORMAT_RGBA_UINT8,
+      fetch_texel_1d_rgba_uint8,
+      fetch_texel_2d_rgba_uint8,
+      fetch_texel_3d_rgba_uint8,
+      store_texel_rgba_uint8
+   },
+   {
+      MESA_FORMAT_RGBA_UINT16,
+      fetch_texel_1d_rgba_uint16,
+      fetch_texel_2d_rgba_uint16,
+      fetch_texel_3d_rgba_uint16,
+      store_texel_rgba_uint16
+   },
+   {
+      MESA_FORMAT_RGBA_UINT32,
+      fetch_texel_1d_rgba_uint32,
+      fetch_texel_2d_rgba_uint32,
+      fetch_texel_3d_rgba_uint32,
+      store_texel_rgba_uint32
+   },
+
+   /* dudv */
+   {
+      MESA_FORMAT_DUDV8,
+      fetch_texel_1d_dudv8,
+      fetch_texel_2d_dudv8,
+      fetch_texel_3d_dudv8,
+      NULL
+   },
+
+   /* signed, normalized */
+   {
+      MESA_FORMAT_SIGNED_R8,
+      fetch_texel_1d_signed_r8,
+      fetch_texel_2d_signed_r8,
+      fetch_texel_3d_signed_r8,
+      store_texel_signed_r8
+   },
+   {
+      MESA_FORMAT_SIGNED_RG88,
+      fetch_texel_1d_signed_rg88,
+      fetch_texel_2d_signed_rg88,
+      fetch_texel_3d_signed_rg88,
+      store_texel_signed_rg88
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBX8888,
+      fetch_texel_1d_signed_rgbx8888,
+      fetch_texel_2d_signed_rgbx8888,
+      fetch_texel_3d_signed_rgbx8888,
+      store_texel_signed_rgbx8888
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA8888,
+      fetch_texel_1d_signed_rgba8888,
+      fetch_texel_2d_signed_rgba8888,
+      fetch_texel_3d_signed_rgba8888,
+      store_texel_signed_rgba8888
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA8888_REV,
+      fetch_texel_1d_signed_rgba8888_rev,
+      fetch_texel_2d_signed_rgba8888_rev,
+      fetch_texel_3d_signed_rgba8888_rev,
+      store_texel_signed_rgba8888_rev
+   },
+   {
+      MESA_FORMAT_SIGNED_R_16,
+      fetch_texel_1d_signed_r_16,
+      fetch_texel_2d_signed_r_16,
+      fetch_texel_3d_signed_r_16,
+      store_texel_signed_r_16
+   },
+   {
+      MESA_FORMAT_SIGNED_RG_16,
+      fetch_texel_1d_signed_rg_16,
+      fetch_texel_2d_signed_rg_16,
+      fetch_texel_3d_signed_rg_16,
+      store_texel_signed_rg_16
+   },
+   {
+      MESA_FORMAT_SIGNED_RGB_16,
+      fetch_texel_1d_signed_rgb_16,
+      fetch_texel_2d_signed_rgb_16,
+      fetch_texel_3d_signed_rgb_16,
+      store_texel_signed_rgb_16
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA_16,
+      fetch_texel_1d_signed_rgba_16,
+      fetch_texel_2d_signed_rgba_16,
+      fetch_texel_3d_signed_rgba_16,
+      store_texel_signed_rgba_16
+   },
+   {
+      MESA_FORMAT_RGBA_16,
+      fetch_texel_1d_rgba_16,
+      fetch_texel_2d_rgba_16,
+      fetch_texel_3d_rgba_16,
+      store_texel_rgba_16
+   },
+   {
+      MESA_FORMAT_RED_RGTC1,
+      NULL,
+      _mesa_fetch_texel_2d_f_red_rgtc1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SIGNED_RED_RGTC1,
+      NULL,
+      _mesa_fetch_texel_2d_f_signed_red_rgtc1,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_RGTC2,
+      NULL,
+      _mesa_fetch_texel_2d_f_rg_rgtc2,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SIGNED_RG_RGTC2,
+      NULL,
+      _mesa_fetch_texel_2d_f_signed_rg_rgtc2,
+      NULL,
+      NULL
+   },
+};
+
+
+FetchTexelFuncF
+_mesa_get_texel_fetch_func(gl_format format, GLuint dims)
+{
+#ifdef DEBUG
+   /* check that the table entries are sorted by format name */
+   gl_format fmt;
+   for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
+      assert(texfetch_funcs[fmt].Name == fmt);
+   }
+#endif
+
+   assert(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
+   assert(format < MESA_FORMAT_COUNT);
+
+   switch (dims) {
+   case 1:
+      return texfetch_funcs[format].Fetch1D;
+   case 2:
+      return texfetch_funcs[format].Fetch2D;
+   case 3:
+      return texfetch_funcs[format].Fetch3D;
+   default:
+      assert(0 && "bad dims in _mesa_get_texel_fetch_func");
+      return NULL;
+   }
+}
+
+
+StoreTexelFunc
+_mesa_get_texel_store_func(gl_format format)
+{
+   assert(format < MESA_FORMAT_COUNT);
+   return texfetch_funcs[format].StoreTexel;
+}
+
+
+/**
+ * Adaptor for fetching a GLchan texel from a float-valued texture.
+ */
+static void
+fetch_texel_float_to_chan(const struct gl_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLchan *texelOut)
+{
+   GLfloat temp[4];
+   GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
+
+   ASSERT(texImage->FetchTexelf);
+   texImage->FetchTexelf(texImage, i, j, k, temp);
+   if (baseFormat == GL_DEPTH_COMPONENT ||
+       baseFormat == GL_DEPTH_STENCIL_EXT) {
+      /* just one channel */
+      UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]);
+   }
+   else {
+      /* four channels */
+      UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]);
+      UNCLAMPED_FLOAT_TO_CHAN(texelOut[1], temp[1]);
+      UNCLAMPED_FLOAT_TO_CHAN(texelOut[2], temp[2]);
+      UNCLAMPED_FLOAT_TO_CHAN(texelOut[3], temp[3]);
+   }
+}
+
+
+#if 0
+/**
+ * Adaptor for fetching a float texel from a GLchan-valued texture.
+ */
+static void
+fetch_texel_chan_to_float(const struct gl_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texelOut)
+{
+   GLchan temp[4];
+   GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
+
+   ASSERT(texImage->FetchTexelc);
+   texImage->FetchTexelc(texImage, i, j, k, temp);
+   if (baseFormat == GL_DEPTH_COMPONENT ||
+       baseFormat == GL_DEPTH_STENCIL_EXT) {
+      /* just one channel */
+      texelOut[0] = CHAN_TO_FLOAT(temp[0]);
+   }
+   else {
+      /* four channels */
+      texelOut[0] = CHAN_TO_FLOAT(temp[0]);
+      texelOut[1] = CHAN_TO_FLOAT(temp[1]);
+      texelOut[2] = CHAN_TO_FLOAT(temp[2]);
+      texelOut[3] = CHAN_TO_FLOAT(temp[3]);
+   }
+}
+#endif
+
+
+/**
+ * Initialize the texture image's FetchTexelc and FetchTexelf methods.
+ */
+void
+_mesa_set_fetch_functions(struct gl_texture_image *texImage, GLuint dims)
+{
+   gl_format format = texImage->TexFormat;
+
+   ASSERT(dims == 1 || dims == 2 || dims == 3);
+
+   if (texImage->TexObject->sRGBDecode == GL_SKIP_DECODE_EXT &&
+       _mesa_get_format_color_encoding(format) == GL_SRGB) {
+      format = _mesa_get_srgb_format_linear(format);
+   }
+
+   texImage->FetchTexelf = _mesa_get_texel_fetch_func(format, dims);
+
+   texImage->FetchTexelc = fetch_texel_float_to_chan;
+
+   ASSERT(texImage->FetchTexelc);
+   ASSERT(texImage->FetchTexelf);
+}
+
+void
+_mesa_update_fetch_functions(struct gl_texture_object *texObj)
+{
+   GLuint face, i;
+   GLuint dims;
+
+   dims = _mesa_get_texture_dimensions(texObj->Target);
+
+   for (face = 0; face < 6; face++) {
+      for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
+         if (texObj->Image[face][i]) {
+	    _mesa_set_fetch_functions(texObj->Image[face][i], dims);
+         }
+      }
+   }
+}