svn merge ^/branches/released .

10 files changed, 1946 insertions, 634 deletions

diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c
index 9f58b45e2..1b540e99a 100644
--- a/mesalib/src/mesa/main/extensions.c
+++ b/mesalib/src/mesa/main/extensions.c
@@ -428,6 +428,7 @@ _mesa_enable_sw_extensions(struct gl_context *ctx)
    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;

    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;

    ctx->Extensions.ARB_texture_rg = GL_TRUE;

+   ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;

    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;

 #if FEATURE_ARB_vertex_program

    ctx->Extensions.ARB_vertex_program = GL_TRUE;

diff --git a/mesalib/src/mesa/main/formats.c b/mesalib/src/mesa/main/formats.c
index 5c9b3068e..1d7bdad24 100644
--- a/mesalib/src/mesa/main/formats.c
+++ b/mesalib/src/mesa/main/formats.c
@@ -890,7 +890,43 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
       16, 16, 16, 16,

       0, 0, 0, 0, 0,

       1, 1, 8

-   }

+   },

+   {

+     MESA_FORMAT_RED_RGTC1,

+     "MESA_FORMAT_RED_RGTC1",

+     GL_RED,

+     GL_UNSIGNED_NORMALIZED,

+     4, 0, 0, 0,

+     0, 0, 0, 0, 0,

+     4, 4, 8                     /* 8 bytes per 4x4 block */

+   },

+   {

+     MESA_FORMAT_SIGNED_RED_RGTC1,

+     "MESA_FORMAT_SIGNED_RED_RGTC1",

+     GL_RED,

+     GL_SIGNED_NORMALIZED,

+     4, 0, 0, 0,

+     0, 0, 0, 0, 0,

+     4, 4, 8                     /* 8 bytes per 4x4 block */

+   },

+   {

+     MESA_FORMAT_RG_RGTC2,

+     "MESA_FORMAT_RG_RGTC2",

+     GL_RG,

+     GL_UNSIGNED_NORMALIZED,

+     4, 4, 0, 0,

+     0, 0, 0, 0, 0,

+     4, 4, 16                     /* 16 bytes per 4x4 block */

+   },

+   {

+     MESA_FORMAT_SIGNED_RG_RGTC2,

+     "MESA_FORMAT_SIGNED_RG_RGTC2",

+     GL_RG,

+     GL_SIGNED_NORMALIZED,

+     4, 4, 0, 0,

+     0, 0, 0, 0, 0,

+     4, 4, 16                     /* 16 bytes per 4x4 block */

+   },

 };

 

 

@@ -1530,6 +1566,10 @@ _mesa_format_to_type_and_comps(gl_format format,
    case MESA_FORMAT_SRGBA_DXT5:

 #endif

 #endif

+   case MESA_FORMAT_RED_RGTC1:

+   case MESA_FORMAT_SIGNED_RED_RGTC1:

+   case MESA_FORMAT_RG_RGTC2:

+   case MESA_FORMAT_SIGNED_RG_RGTC2:

       /* XXX generate error instead? */

       *datatype = GL_UNSIGNED_BYTE;

       *comps = 0;

diff --git a/mesalib/src/mesa/main/formats.h b/mesalib/src/mesa/main/formats.h
index cd7e0e25e..b32829145 100644
--- a/mesalib/src/mesa/main/formats.h
+++ b/mesalib/src/mesa/main/formats.h
@@ -179,6 +179,12 @@ typedef enum
    MESA_FORMAT_RGBA_16,           /* ... */

    /*@}*/

 

+   /*@{*/

+   MESA_FORMAT_RED_RGTC1,

+   MESA_FORMAT_SIGNED_RED_RGTC1,

+   MESA_FORMAT_RG_RGTC2,

+   MESA_FORMAT_SIGNED_RG_RGTC2,

+   /*@}*/

    MESA_FORMAT_COUNT

 } gl_format;

 

diff --git a/mesalib/src/mesa/main/texcompress.c b/mesalib/src/mesa/main/texcompress.c
index eaebb06d3..9891946df 100644
--- a/mesalib/src/mesa/main/texcompress.c
+++ b/mesalib/src/mesa/main/texcompress.c
@@ -64,6 +64,7 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats, GLboolean a
          n += 2;

       }

    }

+   /* don't return RGTC - ARB_texture_compression_rgtc query 19 */

    if (ctx->Extensions.EXT_texture_compression_s3tc) {

       if (formats) {

          formats[n++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;

@@ -163,6 +164,15 @@ _mesa_glenum_to_compressed_format(GLenum format)
    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

       return MESA_FORMAT_SRGBA_DXT5;

 

+   case GL_COMPRESSED_RED_RGTC1:

+      return MESA_FORMAT_RED_RGTC1;

+   case GL_COMPRESSED_SIGNED_RED_RGTC1:

+      return MESA_FORMAT_SIGNED_RED_RGTC1;

+   case GL_COMPRESSED_RG_RGTC2:

+      return MESA_FORMAT_RG_RGTC2;

+   case GL_COMPRESSED_SIGNED_RG_RGTC2:

+      return MESA_FORMAT_SIGNED_RG_RGTC2;

+

    default:

       return MESA_FORMAT_NONE;

    }

@@ -209,6 +219,16 @@ _mesa_compressed_format_to_glenum(struct gl_context *ctx, GLuint mesaFormat)
       return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;

 #endif

 #endif

+

+   case MESA_FORMAT_RED_RGTC1:

+      return GL_COMPRESSED_RED_RGTC1;

+   case MESA_FORMAT_SIGNED_RED_RGTC1:

+      return GL_COMPRESSED_SIGNED_RED_RGTC1;

+   case MESA_FORMAT_RG_RGTC2:

+      return GL_COMPRESSED_RG_RGTC2;

+   case MESA_FORMAT_SIGNED_RG_RGTC2:

+      return GL_COMPRESSED_SIGNED_RG_RGTC2;

+

    default:

       _mesa_problem(ctx, "Unexpected mesa texture format in"

                     " _mesa_compressed_format_to_glenum()");

diff --git a/mesalib/src/mesa/main/texcompress_rgtc.c b/mesalib/src/mesa/main/texcompress_rgtc.c
new file mode 100644
index 000000000..586715083
--- /dev/null
+++ b/mesalib/src/mesa/main/texcompress_rgtc.c
@@ -0,0 +1,1122 @@
+/*
+ * Copyright (C) 2011 Red Hat Inc.
+ * 
+ * block compression parts are:
+ * Copyright (C) 2004  Roland Scheidegger   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 (including the next
+ * paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Author:
+ *    Dave Airlie
+ */
+
+/**
+ * \file texcompress_rgtc.c
+ * GL_EXT_texture_compression_rgtc support.
+ */
+
+
+#include "glheader.h"
+#include "imports.h"
+#include "colormac.h"
+#include "image.h"
+#include "macros.h"
+#include "mfeatures.h"
+#include "mipmap.h"
+#include "texcompress.h"
+#include "texcompress_rgtc.h"
+#include "texstore.h"
+
+#define RGTC_DEBUG 0
+
+static void encode_rgtc_chan_u(GLubyte *blkaddr, GLubyte srccolors[4][4],
+			     GLint numxpixels, GLint numypixels);
+static void encode_rgtc_chan_s(GLbyte *blkaddr, GLbyte srccolors[4][4],
+			     GLint numxpixels, GLint numypixels);
+
+static void extractsrc_u( GLubyte srcpixels[4][4], const GLchan *srcaddr,
+			  GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
+{
+   GLubyte i, j;
+   const GLchan *curaddr;
+   for (j = 0; j < numypixels; j++) {
+      curaddr = srcaddr + j * srcRowStride * comps;
+      for (i = 0; i < numxpixels; i++) {
+	 srcpixels[j][i] = *curaddr / (CHAN_MAX / 255);
+	 curaddr += comps;
+      }
+   }
+}
+
+static void extractsrc_s( GLbyte srcpixels[4][4], const GLfloat *srcaddr,
+			  GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
+{
+   GLubyte i, j;
+   const GLfloat *curaddr;
+   for (j = 0; j < numypixels; j++) {
+      curaddr = srcaddr + j * srcRowStride * comps;
+      for (i = 0; i < numxpixels; i++) {
+	 srcpixels[j][i] = FLOAT_TO_BYTE_TEX(*curaddr);
+	 curaddr += comps;
+      }
+   }
+}
+
+
+GLboolean
+_mesa_texstore_red_rgtc1(TEXSTORE_PARAMS)
+{
+   GLubyte *dst;
+   const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */
+   const GLchan *tempImage = NULL;
+   int i, j;
+   int numxpixels, numypixels;
+   const char *srcaddr;
+   GLubyte srcpixels[4][4];
+   GLubyte *blkaddr;
+   GLint dstRowDiff;
+   ASSERT(dstFormat == MESA_FORMAT_RED_RGTC1);
+   ASSERT(dstXoffset % 4 == 0);
+   ASSERT(dstYoffset % 4 == 0);
+   ASSERT(dstZoffset % 4 == 0);
+   (void) dstZoffset;
+   (void) dstImageOffsets;
+
+
+   tempImage = _mesa_make_temp_chan_image(ctx, dims,
+					  baseInternalFormat,
+					  _mesa_get_format_base_format(dstFormat),
+					  srcWidth, srcHeight, srcDepth,
+					  srcFormat, srcType, srcAddr,
+					  srcPacking);
+   if (!tempImage)
+      return GL_FALSE; /* out of memory */
+
+   dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
+                                        dstFormat,
+                                        texWidth, (GLubyte *) dstAddr);
+
+   blkaddr = dst;
+   dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
+   for (j = 0; j < srcHeight; j+=4) {
+      if (srcHeight > j + 3) numypixels = 4;
+      else numypixels = srcHeight - j;
+      srcaddr = tempImage + j * srcWidth;
+      for (i = 0; i < srcWidth; i += 4) {
+	 if (srcWidth > i + 3) numxpixels = 4;
+	 else numxpixels = srcWidth - i;
+	 extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
+	 encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels);
+	 srcaddr += numxpixels;
+	 blkaddr += 8;
+      }
+      blkaddr += dstRowDiff;
+   }
+   if (tempImage)
+      free((void *) tempImage);
+
+   return GL_TRUE;
+}
+
+GLboolean
+_mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS)
+{
+   GLbyte *dst;
+   const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */
+   const GLfloat *tempImage = NULL;
+   int i, j;
+   int numxpixels, numypixels;
+   const GLfloat *srcaddr;
+   GLbyte srcpixels[4][4];
+   GLbyte *blkaddr;
+   GLint dstRowDiff;
+   ASSERT(dstFormat == MESA_FORMAT_SIGNED_RED_RGTC1);
+   ASSERT(dstXoffset % 4 == 0);
+   ASSERT(dstYoffset % 4 == 0);
+   ASSERT(dstZoffset % 4 == 0);
+   (void) dstZoffset;
+   (void) dstImageOffsets;
+
+   tempImage = _mesa_make_temp_float_image(ctx, dims,
+					   baseInternalFormat,
+					   _mesa_get_format_base_format(dstFormat),
+					   srcWidth, srcHeight, srcDepth,
+					   srcFormat, srcType, srcAddr,
+					   srcPacking, 0x0);
+   if (!tempImage)
+      return GL_FALSE; /* out of memory */
+
+   dst = (GLbyte *)_mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
+						  dstFormat,
+						  texWidth, (GLubyte *) dstAddr);
+
+   blkaddr = dst;
+   dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
+   for (j = 0; j < srcHeight; j+=4) {
+      if (srcHeight > j + 3) numypixels = 4;
+      else numypixels = srcHeight - j;
+      srcaddr = tempImage + j * srcWidth;
+      for (i = 0; i < srcWidth; i += 4) {
+	 if (srcWidth > i + 3) numxpixels = 4;
+	 else numxpixels = srcWidth - i;
+	 extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
+	 encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels);
+	 srcaddr += numxpixels;
+	 blkaddr += 8;
+      }
+      blkaddr += dstRowDiff;
+   }
+   if (tempImage)
+      free((void *) tempImage);
+
+   return GL_TRUE;
+}
+
+GLboolean
+_mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS)
+{
+   GLubyte *dst;
+   const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */
+   const GLchan *tempImage = NULL;
+   int i, j;
+   int numxpixels, numypixels;
+   const char *srcaddr;
+   GLubyte srcpixels[4][4];
+   GLubyte *blkaddr;
+   GLint dstRowDiff;
+
+   ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2);
+   ASSERT(dstXoffset % 4 == 0);
+   ASSERT(dstYoffset % 4 == 0);
+   ASSERT(dstZoffset % 4 == 0);
+   (void) dstZoffset;
+   (void) dstImageOffsets;
+
+   tempImage = _mesa_make_temp_chan_image(ctx, dims,
+					  baseInternalFormat,
+					  _mesa_get_format_base_format(dstFormat),
+					  srcWidth, srcHeight, srcDepth,
+					  srcFormat, srcType, srcAddr,
+					  srcPacking);
+   if (!tempImage)
+      return GL_FALSE; /* out of memory */
+
+   dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
+                                        dstFormat,
+                                        texWidth, (GLubyte *) dstAddr);
+
+   blkaddr = dst;
+   dstRowDiff = dstRowStride >= (srcWidth * 8) ? dstRowStride - (((srcWidth + 7) & ~7) * 8) : 0;
+   for (j = 0; j < srcHeight; j+=4) {
+      if (srcHeight > j + 3) numypixels = 4;
+      else numypixels = srcHeight - j;
+      srcaddr = tempImage + j * srcWidth * 2;
+      for (i = 0; i < srcWidth; i += 4) {
+	 if (srcWidth > i + 3) numxpixels = 4;
+	 else numxpixels = srcWidth - i;
+	 extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
+	 encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels);
+
+	 blkaddr += 8;
+	 extractsrc_u(srcpixels, (GLchan *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
+	 encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels);
+
+	 blkaddr += 8;
+
+	 srcaddr += numxpixels * 2;
+      }
+      blkaddr += dstRowDiff;
+   }
+   if (tempImage)
+      free((void *) tempImage);
+
+   return GL_TRUE;
+}
+
+GLboolean
+_mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
+{
+   GLbyte *dst;
+   const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */
+   const GLfloat *tempImage = NULL;
+   int i, j;
+   int numxpixels, numypixels;
+   const GLfloat *srcaddr;
+   GLbyte srcpixels[4][4];
+   GLbyte *blkaddr;
+   GLint dstRowDiff;
+
+   ASSERT(dstFormat == MESA_FORMAT_SIGNED_RG_RGTC2);
+   ASSERT(dstXoffset % 4 == 0);
+   ASSERT(dstYoffset % 4 == 0);
+   ASSERT(dstZoffset % 4 == 0);
+   (void) dstZoffset;
+   (void) dstImageOffsets;
+
+   tempImage = _mesa_make_temp_float_image(ctx, dims,
+					   baseInternalFormat,
+					   _mesa_get_format_base_format(dstFormat),
+					   srcWidth, srcHeight, srcDepth,
+					   srcFormat, srcType, srcAddr,
+					   srcPacking, 0x0);
+   if (!tempImage)
+      return GL_FALSE; /* out of memory */
+
+   dst = (GLbyte *)_mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
+						  dstFormat,
+						  texWidth, (GLubyte *) dstAddr);
+
+   blkaddr = dst;
+   dstRowDiff = dstRowStride >= (srcWidth * 8) ? dstRowStride - (((srcWidth + 7) & ~7) * 8) : 0;
+   for (j = 0; j < srcHeight; j += 4) {
+      if (srcHeight > j + 3) numypixels = 4;
+      else numypixels = srcHeight - j;
+      srcaddr = tempImage + j * srcWidth * 2;
+      for (i = 0; i < srcWidth; i += 4) {
+	 if (srcWidth > i + 3) numxpixels = 4;
+	 else numxpixels = srcWidth - i;
+
+	 extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
+	 encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels);
+	 blkaddr += 8;
+
+	 extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
+	 encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels);
+	 blkaddr += 8;
+
+	 srcaddr += numxpixels * 2;
+
+      }
+      blkaddr += dstRowDiff;
+   }
+   if (tempImage)
+      free((void *) tempImage);
+
+   return GL_TRUE;
+}
+
+static void _fetch_texel_rgtc_u(GLint srcRowStride, const GLubyte *pixdata,
+				GLint i, GLint j, GLchan *value, int comps)
+{
+   GLchan decode;
+   const GLubyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps);
+   const GLubyte alpha0 = blksrc[0];
+   const GLubyte alpha1 = blksrc[1];
+   const GLubyte bit_pos = ((j&3) * 4 + (i&3)) * 3;
+   const GLubyte acodelow = blksrc[2 + bit_pos / 8];
+   const GLubyte acodehigh = blksrc[3 + bit_pos / 8];
+   const GLubyte code = (acodelow >> (bit_pos & 0x7) |
+      (acodehigh  << (8 - (bit_pos & 0x7)))) & 0x7;
+
+   if (code == 0)
+      decode = UBYTE_TO_CHAN( alpha0 );
+   else if (code == 1)
+      decode = UBYTE_TO_CHAN( alpha1 );
+   else if (alpha0 > alpha1)
+      decode = UBYTE_TO_CHAN( ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7) );
+   else if (code < 6)
+      decode = UBYTE_TO_CHAN( ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5) );
+   else if (code == 6)
+      decode = 0;
+   else
+      decode = CHAN_MAX;
+
+   *value = decode;
+}
+
+
+static void _fetch_texel_rgtc_s(GLint srcRowStride, const GLbyte *pixdata,
+				GLint i, GLint j, GLbyte *value, int comps)
+{
+   GLbyte decode;
+   const GLbyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps);
+   const GLbyte alpha0 = blksrc[0];
+   const GLbyte alpha1 = blksrc[1];
+   const GLbyte bit_pos = ((j&3) * 4 + (i&3)) * 3;
+   const GLbyte acodelow = blksrc[2 + bit_pos / 8];
+   const GLbyte acodehigh = blksrc[3 + bit_pos / 8];
+   const GLbyte code = (acodelow >> (bit_pos & 0x7) |
+      (acodehigh  << (8 - (bit_pos & 0x7)))) & 0x7;
+
+   if (code == 0)
+      decode = alpha0;
+   else if (code == 1)
+      decode = alpha1;
+   else if (alpha0 > alpha1)
+      decode = ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7);
+   else if (code < 6)
+      decode = ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5);
+   else if (code == 6)
+      decode = -128;
+   else
+      decode = 127;
+
+   *value = decode;
+}
+
+void
+_mesa_fetch_texel_2d_f_red_rgtc1(const struct gl_texture_image *texImage,
+				 GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   GLchan red;
+   _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data),
+		       i, j, &red, 1);
+   texel[RCOMP] = CHAN_TO_FLOAT(red);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+void
+_mesa_fetch_texel_2d_f_signed_red_rgtc1(const struct gl_texture_image *texImage,
+					GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   GLbyte red;
+   _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data),
+		       i, j, &red, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+void
+_mesa_fetch_texel_2d_f_rg_rgtc2(const struct gl_texture_image *texImage,
+				 GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   GLchan red, green;
+   _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data),
+		     i, j, &red, 2);
+   _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data) + 8,
+		     i, j, &green, 2);
+   texel[RCOMP] = CHAN_TO_FLOAT(red);
+   texel[GCOMP] = CHAN_TO_FLOAT(green);
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+void
+_mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage,
+				       GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   GLbyte red, green;
+   _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data),
+		     i, j, &red, 2);
+   _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data) + 8,
+		     i, j, &green, 2);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
+   texel[GCOMP] = BYTE_TO_FLOAT_TEX(green);
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+static void write_rgtc_encoded_channel(GLubyte *blkaddr,
+				       GLubyte alphabase1,
+				       GLubyte alphabase2,
+				       GLubyte alphaenc[16])
+{
+   *blkaddr++ = alphabase1;
+   *blkaddr++ = alphabase2;
+   *blkaddr++ = alphaenc[0] | (alphaenc[1] << 3) | ((alphaenc[2] & 3) << 6);
+   *blkaddr++ = (alphaenc[2] >> 2) | (alphaenc[3] << 1) | (alphaenc[4] << 4) | ((alphaenc[5] & 1) << 7);
+   *blkaddr++ = (alphaenc[5] >> 1) | (alphaenc[6] << 2) | (alphaenc[7] << 5);
+   *blkaddr++ = alphaenc[8] | (alphaenc[9] << 3) | ((alphaenc[10] & 3) << 6);
+   *blkaddr++ = (alphaenc[10] >> 2) | (alphaenc[11] << 1) | (alphaenc[12] << 4) | ((alphaenc[13] & 1) << 7);
+   *blkaddr++ = (alphaenc[13] >> 1) | (alphaenc[14] << 2) | (alphaenc[15] << 5);
+}
+
+static void encode_rgtc_chan_u(GLubyte *blkaddr, GLubyte srccolors[4][4],
+			     GLint numxpixels, GLint numypixels)
+{
+   GLubyte alphabase[2], alphause[2];
+   GLshort alphatest[2] = { 0 };
+   GLuint alphablockerror1, alphablockerror2, alphablockerror3;
+   GLubyte i, j, aindex, acutValues[7];
+   GLubyte alphaenc1[16], alphaenc2[16], alphaenc3[16];
+   GLboolean alphaabsmin = GL_FALSE;
+   GLboolean alphaabsmax = GL_FALSE;
+   GLshort alphadist;
+
+   /* find lowest and highest alpha value in block, alphabase[0] lowest, alphabase[1] highest */
+   alphabase[0] = 0xff; alphabase[1] = 0x0;
+   for (j = 0; j < numypixels; j++) {
+      for (i = 0; i < numxpixels; i++) {
+         if (srccolors[j][i] == 0)
+            alphaabsmin = GL_TRUE;
+         else if (srccolors[j][i] == 255)
+            alphaabsmax = GL_TRUE;
+         else {
+            if (srccolors[j][i] > alphabase[1])
+               alphabase[1] = srccolors[j][i];
+            if (srccolors[j][i] < alphabase[0])
+               alphabase[0] = srccolors[j][i];
+         }
+      }
+   }
+
+
+   if ((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) { /* one color, either max or min */
+      /* shortcut here since it is a very common case (and also avoids later problems) */
+      /* || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax) */
+      /* could also thest for alpha0 == alpha1 (and not min/max), but probably not common, so don't bother */
+
+      *blkaddr++ = srccolors[0][0];
+      blkaddr++;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+#if RGTC_DEBUG
+      fprintf(stderr, "enc0 used\n");
+#endif
+      return;
+   }
+
+   /* find best encoding for alpha0 > alpha1 */
+   /* it's possible this encoding is better even if both alphaabsmin and alphaabsmax are true */
+   alphablockerror1 = 0x0;
+   alphablockerror2 = 0xffffffff;
+   alphablockerror3 = 0xffffffff;
+   if (alphaabsmin) alphause[0] = 0;
+   else alphause[0] = alphabase[0];
+   if (alphaabsmax) alphause[1] = 255;
+   else alphause[1] = alphabase[1];
+   /* calculate the 7 cut values, just the middle between 2 of the computed alpha values */
+   for (aindex = 0; aindex < 7; aindex++) {
+      /* don't forget here is always rounded down */
+      acutValues[aindex] = (alphause[0] * (2*aindex + 1) + alphause[1] * (14 - (2*aindex + 1))) / 14;
+   }
+
+   for (j = 0; j < numypixels; j++) {
+      for (i = 0; i < numxpixels; i++) {
+         /* maybe it's overkill to have the most complicated calculation just for the error
+            calculation which we only need to figure out if encoding1 or encoding2 is better... */
+         if (srccolors[j][i] > acutValues[0]) {
+            alphaenc1[4*j + i] = 0;
+            alphadist = srccolors[j][i] - alphause[1];
+         }
+         else if (srccolors[j][i] > acutValues[1]) {
+            alphaenc1[4*j + i] = 2;
+            alphadist = srccolors[j][i] - (alphause[1] * 6 + alphause[0] * 1) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[2]) {
+            alphaenc1[4*j + i] = 3;
+            alphadist = srccolors[j][i] - (alphause[1] * 5 + alphause[0] * 2) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[3]) {
+            alphaenc1[4*j + i] = 4;
+            alphadist = srccolors[j][i] - (alphause[1] * 4 + alphause[0] * 3) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[4]) {
+            alphaenc1[4*j + i] = 5;
+            alphadist = srccolors[j][i] - (alphause[1] * 3 + alphause[0] * 4) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[5]) {
+            alphaenc1[4*j + i] = 6;
+            alphadist = srccolors[j][i] - (alphause[1] * 2 + alphause[0] * 5) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[6]) {
+            alphaenc1[4*j + i] = 7;
+            alphadist = srccolors[j][i] - (alphause[1] * 1 + alphause[0] * 6) / 7;
+         }
+         else {
+            alphaenc1[4*j + i] = 1;
+            alphadist = srccolors[j][i] - alphause[0];
+         }
+         alphablockerror1 += alphadist * alphadist;
+      }
+   }
+
+#if RGTC_DEBUG
+   for (i = 0; i < 16; i++) {
+      fprintf(stderr, "%d ", alphaenc1[i]);
+   }
+   fprintf(stderr, "cutVals ");
+   for (i = 0; i < 8; i++) {
+      fprintf(stderr, "%d ", acutValues[i]);
+   }
+   fprintf(stderr, "srcVals ");
+   for (j = 0; j < numypixels; j++) {
+      for (i = 0; i < numxpixels; i++) {
+	 fprintf(stderr, "%d ", srccolors[j][i]);
+      }
+   }
+   fprintf(stderr, "\n");
+#endif
+
+   /* it's not very likely this encoding is better if both alphaabsmin and alphaabsmax
+      are false but try it anyway */
+   if (alphablockerror1 >= 32) {
+
+      /* don't bother if encoding is already very good, this condition should also imply
+      we have valid alphabase colors which we absolutely need (alphabase[0] <= alphabase[1]) */
+      alphablockerror2 = 0;
+      for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+         acutValues[aindex] = (alphabase[0] * (10 - (2*aindex + 1)) + alphabase[1] * (2*aindex + 1)) / 10;
+      }
+      for (j = 0; j < numypixels; j++) {
+         for (i = 0; i < numxpixels; i++) {
+             /* maybe it's overkill to have the most complicated calculation just for the error
+               calculation which we only need to figure out if encoding1 or encoding2 is better... */
+            if (srccolors[j][i] == 0) {
+               alphaenc2[4*j + i] = 6;
+               alphadist = 0;
+            }
+            else if (srccolors[j][i] == 255) {
+               alphaenc2[4*j + i] = 7;
+               alphadist = 0;
+            }
+            else if (srccolors[j][i] <= acutValues[0]) {
+               alphaenc2[4*j + i] = 0;
+               alphadist = srccolors[j][i] - alphabase[0];
+            }
+            else if (srccolors[j][i] <= acutValues[1]) {
+               alphaenc2[4*j + i] = 2;
+               alphadist = srccolors[j][i] - (alphabase[0] * 4 + alphabase[1] * 1) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[2]) {
+               alphaenc2[4*j + i] = 3;
+               alphadist = srccolors[j][i] - (alphabase[0] * 3 + alphabase[1] * 2) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[3]) {
+               alphaenc2[4*j + i] = 4;
+               alphadist = srccolors[j][i] - (alphabase[0] * 2 + alphabase[1] * 3) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[4]) {
+               alphaenc2[4*j + i] = 5;
+               alphadist = srccolors[j][i] - (alphabase[0] * 1 + alphabase[1] * 4) / 5;
+            }
+            else {
+               alphaenc2[4*j + i] = 1;
+               alphadist = srccolors[j][i] - alphabase[1];
+            }
+            alphablockerror2 += alphadist * alphadist;
+         }
+      }
+
+
+      /* skip this if the error is already very small
+         this encoding is MUCH better on average than #2 though, but expensive! */
+      if ((alphablockerror2 > 96) && (alphablockerror1 > 96)) {
+         GLshort blockerrlin1 = 0;
+         GLshort blockerrlin2 = 0;
+         GLubyte nralphainrangelow = 0;
+         GLubyte nralphainrangehigh = 0;
+         alphatest[0] = 0xff;
+         alphatest[1] = 0x0;
+         /* if we have large range it's likely there are values close to 0/255, try to map them to 0/255 */
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+               if ((srccolors[j][i] > alphatest[1]) && (srccolors[j][i] < (255 -(alphabase[1] - alphabase[0]) / 28)))
+                  alphatest[1] = srccolors[j][i];
+               if ((srccolors[j][i] < alphatest[0]) && (srccolors[j][i] > (alphabase[1] - alphabase[0]) / 28))
+                  alphatest[0] = srccolors[j][i];
+            }
+         }
+          /* shouldn't happen too often, don't really care about those degenerated cases */
+          if (alphatest[1] <= alphatest[0]) {
+             alphatest[0] = 1;
+             alphatest[1] = 254;
+         }
+         for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+            acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10;
+         }
+
+         /* find the "average" difference between the alpha values and the next encoded value.
+            This is then used to calculate new base values.
+            Should there be some weighting, i.e. those values closer to alphatest[x] have more weight,
+            since they will see more improvement, and also because the values in the middle are somewhat
+            likely to get no improvement at all (because the base values might move in different directions)?
+            OTOH it would mean the values in the middle are even less likely to get an improvement
+         */
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+               if (srccolors[j][i] <= alphatest[0] / 2) {
+               }
+               else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) {
+               }
+               else if (srccolors[j][i] <= acutValues[0]) {
+                  blockerrlin1 += (srccolors[j][i] - alphatest[0]);
+                  nralphainrangelow += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[1]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[2]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[3]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[4]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+                  }
+               else {
+                  blockerrlin2 += (srccolors[j][i] - alphatest[1]);
+                  nralphainrangehigh += 1;
+               }
+            }
+         }
+         /* shouldn't happen often, needed to avoid div by zero */
+         if (nralphainrangelow == 0) nralphainrangelow = 1;
+         if (nralphainrangehigh == 0) nralphainrangehigh = 1;
+         alphatest[0] = alphatest[0] + (blockerrlin1 / nralphainrangelow);
+#if RGTC_DEBUG
+         fprintf(stderr, "block err lin low %d, nr %d\n", blockerrlin1, nralphainrangelow);
+         fprintf(stderr, "block err lin high %d, nr %d\n", blockerrlin2, nralphainrangehigh);
+#endif
+         /* again shouldn't really happen often... */
+         if (alphatest[0] < 0) {
+            alphatest[0] = 0;
+         }
+         alphatest[1] = alphatest[1] + (blockerrlin2 / nralphainrangehigh);
+         if (alphatest[1] > 255) {
+            alphatest[1] = 255;
+         }
+
+         alphablockerror3 = 0;
+         for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+            acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10;
+         }
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+                /* maybe it's overkill to have the most complicated calculation just for the error
+                  calculation which we only need to figure out if encoding1 or encoding2 is better... */
+               if (srccolors[j][i] <= alphatest[0] / 2) {
+                  alphaenc3[4*j + i] = 6;
+                  alphadist = srccolors[j][i];
+               }
+               else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) {
+                  alphaenc3[4*j + i] = 7;
+                  alphadist = 255 - srccolors[j][i];
+               }
+               else if (srccolors[j][i] <= acutValues[0]) {
+                  alphaenc3[4*j + i] = 0;
+                  alphadist = srccolors[j][i] - alphatest[0];
+               }
+               else if (srccolors[j][i] <= acutValues[1]) {
+                 alphaenc3[4*j + i] = 2;
+                 alphadist = srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[2]) {
+                  alphaenc3[4*j + i] = 3;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[3]) {
+                  alphaenc3[4*j + i] = 4;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[4]) {
+                  alphaenc3[4*j + i] = 5;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5;
+               }
+               else {
+                  alphaenc3[4*j + i] = 1;
+                  alphadist = srccolors[j][i] - alphatest[1];
+               }
+               alphablockerror3 += alphadist * alphadist;
+            }
+         }
+      }
+   }
+  /* write the alpha values and encoding back. */
+   if ((alphablockerror1 <= alphablockerror2) && (alphablockerror1 <= alphablockerror3)) {
+#if RGTC_DEBUG
+      if (alphablockerror1 > 96) fprintf(stderr, "enc1 used, error %d\n", alphablockerror1);
+#endif
+      write_rgtc_encoded_channel( blkaddr, alphause[1], alphause[0], alphaenc1 );
+   }
+   else if (alphablockerror2 <= alphablockerror3) {
+#if RGTC_DEBUG
+      if (alphablockerror2 > 96) fprintf(stderr, "enc2 used, error %d\n", alphablockerror2);
+#endif
+      write_rgtc_encoded_channel( blkaddr, alphabase[0], alphabase[1], alphaenc2 );
+   }
+   else {
+#if RGTC_DEBUG
+      fprintf(stderr, "enc3 used, error %d\n", alphablockerror3);
+#endif
+      write_rgtc_encoded_channel( blkaddr, (GLubyte)alphatest[0], (GLubyte)alphatest[1], alphaenc3 );
+   }
+}
+
+
+static void write_rgtc_encoded_channel_s(GLbyte *blkaddr,
+					 GLbyte alphabase1,
+					 GLbyte alphabase2,
+					 GLbyte alphaenc[16])
+{
+   *blkaddr++ = alphabase1;
+   *blkaddr++ = alphabase2;
+   *blkaddr++ = alphaenc[0] | (alphaenc[1] << 3) | ((alphaenc[2] & 3) << 6);
+   *blkaddr++ = (alphaenc[2] >> 2) | (alphaenc[3] << 1) | (alphaenc[4] << 4) | ((alphaenc[5] & 1) << 7);
+   *blkaddr++ = (alphaenc[5] >> 1) | (alphaenc[6] << 2) | (alphaenc[7] << 5);
+   *blkaddr++ = alphaenc[8] | (alphaenc[9] << 3) | ((alphaenc[10] & 3) << 6);
+   *blkaddr++ = (alphaenc[10] >> 2) | (alphaenc[11] << 1) | (alphaenc[12] << 4) | ((alphaenc[13] & 1) << 7);
+   *blkaddr++ = (alphaenc[13] >> 1) | (alphaenc[14] << 2) | (alphaenc[15] << 5);
+}
+
+static void encode_rgtc_chan_s(GLbyte *blkaddr, GLbyte srccolors[4][4],
+			       GLint numxpixels, GLint numypixels)
+{
+   GLbyte alphabase[2], alphause[2];
+   GLshort alphatest[2] = { 0 };
+   GLuint alphablockerror1, alphablockerror2, alphablockerror3;
+   GLbyte i, j, aindex, acutValues[7];
+   GLbyte alphaenc1[16], alphaenc2[16], alphaenc3[16];
+   GLboolean alphaabsmin = GL_FALSE;
+   GLboolean alphaabsmax = GL_FALSE;
+   GLshort alphadist;
+
+   /* find lowest and highest alpha value in block, alphabase[0] lowest, alphabase[1] highest */
+   alphabase[0] = 0xff; alphabase[1] = 0x0;
+   for (j = 0; j < numypixels; j++) {
+      for (i = 0; i < numxpixels; i++) {
+         if (srccolors[j][i] == 0)
+            alphaabsmin = GL_TRUE;
+         else if (srccolors[j][i] == 255)
+            alphaabsmax = GL_TRUE;
+         else {
+            if (srccolors[j][i] > alphabase[1])
+               alphabase[1] = srccolors[j][i];
+            if (srccolors[j][i] < alphabase[0])
+               alphabase[0] = srccolors[j][i];
+         }
+      }
+   }
+
+
+   if ((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) { /* one color, either max or min */
+      /* shortcut here since it is a very common case (and also avoids later problems) */
+      /* || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax) */
+      /* could also thest for alpha0 == alpha1 (and not min/max), but probably not common, so don't bother */
+
+      *blkaddr++ = srccolors[0][0];
+      blkaddr++;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+      *blkaddr++ = 0;
+#if RGTC_DEBUG
+      fprintf(stderr, "enc0 used\n");
+#endif
+      return;
+   }
+
+   /* find best encoding for alpha0 > alpha1 */
+   /* it's possible this encoding is better even if both alphaabsmin and alphaabsmax are true */
+   alphablockerror1 = 0x0;
+   alphablockerror2 = 0xffffffff;
+   alphablockerror3 = 0xffffffff;
+   if (alphaabsmin) alphause[0] = 0;
+   else alphause[0] = alphabase[0];
+   if (alphaabsmax) alphause[1] = 255;
+   else alphause[1] = alphabase[1];
+   /* calculate the 7 cut values, just the middle between 2 of the computed alpha values */
+   for (aindex = 0; aindex < 7; aindex++) {
+      /* don't forget here is always rounded down */
+      acutValues[aindex] = (alphause[0] * (2*aindex + 1) + alphause[1] * (14 - (2*aindex + 1))) / 14;
+   }
+
+   for (j = 0; j < numypixels; j++) {
+      for (i = 0; i < numxpixels; i++) {
+         /* maybe it's overkill to have the most complicated calculation just for the error
+            calculation which we only need to figure out if encoding1 or encoding2 is better... */
+         if (srccolors[j][i] > acutValues[0]) {
+            alphaenc1[4*j + i] = 0;
+            alphadist = srccolors[j][i] - alphause[1];
+         }
+         else if (srccolors[j][i] > acutValues[1]) {
+            alphaenc1[4*j + i] = 2;
+            alphadist = srccolors[j][i] - (alphause[1] * 6 + alphause[0] * 1) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[2]) {
+            alphaenc1[4*j + i] = 3;
+            alphadist = srccolors[j][i] - (alphause[1] * 5 + alphause[0] * 2) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[3]) {
+            alphaenc1[4*j + i] = 4;
+            alphadist = srccolors[j][i] - (alphause[1] * 4 + alphause[0] * 3) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[4]) {
+            alphaenc1[4*j + i] = 5;
+            alphadist = srccolors[j][i] - (alphause[1] * 3 + alphause[0] * 4) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[5]) {
+            alphaenc1[4*j + i] = 6;
+            alphadist = srccolors[j][i] - (alphause[1] * 2 + alphause[0] * 5) / 7;
+         }
+         else if (srccolors[j][i] > acutValues[6]) {
+            alphaenc1[4*j + i] = 7;
+            alphadist = srccolors[j][i] - (alphause[1] * 1 + alphause[0] * 6) / 7;
+         }
+         else {
+            alphaenc1[4*j + i] = 1;
+            alphadist = srccolors[j][i] - alphause[0];
+         }
+         alphablockerror1 += alphadist * alphadist;
+      }
+   }
+#if RGTC_DEBUG
+   for (i = 0; i < 16; i++) {
+      fprintf(stderr, "%d ", alphaenc1[i]);
+   }
+   fprintf(stderr, "cutVals ");
+   for (i = 0; i < 8; i++) {
+      fprintf(stderr, "%d ", acutValues[i]);
+   }
+   fprintf(stderr, "srcVals ");
+   for (j = 0; j < numypixels; j++)
+      for (i = 0; i < numxpixels; i++) {
+	 fprintf(stderr, "%d ", srccolors[j][i]);
+      }
+   
+   fprintf(stderr, "\n");
+#endif
+
+   /* it's not very likely this encoding is better if both alphaabsmin and alphaabsmax
+      are false but try it anyway */
+   if (alphablockerror1 >= 32) {
+
+      /* don't bother if encoding is already very good, this condition should also imply
+      we have valid alphabase colors which we absolutely need (alphabase[0] <= alphabase[1]) */
+      alphablockerror2 = 0;
+      for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+         acutValues[aindex] = (alphabase[0] * (10 - (2*aindex + 1)) + alphabase[1] * (2*aindex + 1)) / 10;
+      }
+      for (j = 0; j < numypixels; j++) {
+         for (i = 0; i < numxpixels; i++) {
+             /* maybe it's overkill to have the most complicated calculation just for the error
+               calculation which we only need to figure out if encoding1 or encoding2 is better... */
+            if (srccolors[j][i] == 0) {
+               alphaenc2[4*j + i] = 6;
+               alphadist = 0;
+            }
+            else if (srccolors[j][i] == 255) {
+               alphaenc2[4*j + i] = 7;
+               alphadist = 0;
+            }
+            else if (srccolors[j][i] <= acutValues[0]) {
+               alphaenc2[4*j + i] = 0;
+               alphadist = srccolors[j][i] - alphabase[0];
+            }
+            else if (srccolors[j][i] <= acutValues[1]) {
+               alphaenc2[4*j + i] = 2;
+               alphadist = srccolors[j][i] - (alphabase[0] * 4 + alphabase[1] * 1) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[2]) {
+               alphaenc2[4*j + i] = 3;
+               alphadist = srccolors[j][i] - (alphabase[0] * 3 + alphabase[1] * 2) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[3]) {
+               alphaenc2[4*j + i] = 4;
+               alphadist = srccolors[j][i] - (alphabase[0] * 2 + alphabase[1] * 3) / 5;
+            }
+            else if (srccolors[j][i] <= acutValues[4]) {
+               alphaenc2[4*j + i] = 5;
+               alphadist = srccolors[j][i] - (alphabase[0] * 1 + alphabase[1] * 4) / 5;
+            }
+            else {
+               alphaenc2[4*j + i] = 1;
+               alphadist = srccolors[j][i] - alphabase[1];
+            }
+            alphablockerror2 += alphadist * alphadist;
+         }
+      }
+
+
+      /* skip this if the error is already very small
+         this encoding is MUCH better on average than #2 though, but expensive! */
+      if ((alphablockerror2 > 96) && (alphablockerror1 > 96)) {
+         GLshort blockerrlin1 = 0;
+         GLshort blockerrlin2 = 0;
+         GLubyte nralphainrangelow = 0;
+         GLubyte nralphainrangehigh = 0;
+         alphatest[0] = 0xff;
+         alphatest[1] = 0x0;
+         /* if we have large range it's likely there are values close to 0/255, try to map them to 0/255 */
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+               if ((srccolors[j][i] > alphatest[1]) && (srccolors[j][i] < (255 -(alphabase[1] - alphabase[0]) / 28)))
+                  alphatest[1] = srccolors[j][i];
+               if ((srccolors[j][i] < alphatest[0]) && (srccolors[j][i] > (alphabase[1] - alphabase[0]) / 28))
+                  alphatest[0] = srccolors[j][i];
+            }
+         }
+          /* shouldn't happen too often, don't really care about those degenerated cases */
+          if (alphatest[1] <= alphatest[0]) {
+             alphatest[0] = 1;
+             alphatest[1] = 254;
+         }
+         for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+            acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10;
+         }
+
+         /* find the "average" difference between the alpha values and the next encoded value.
+            This is then used to calculate new base values.
+            Should there be some weighting, i.e. those values closer to alphatest[x] have more weight,
+            since they will see more improvement, and also because the values in the middle are somewhat
+            likely to get no improvement at all (because the base values might move in different directions)?
+            OTOH it would mean the values in the middle are even less likely to get an improvement
+         */
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+               if (srccolors[j][i] <= alphatest[0] / 2) {
+               }
+               else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) {
+               }
+               else if (srccolors[j][i] <= acutValues[0]) {
+                  blockerrlin1 += (srccolors[j][i] - alphatest[0]);
+                  nralphainrangelow += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[1]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[2]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[3]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+               }
+               else if (srccolors[j][i] <= acutValues[4]) {
+                  blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5);
+                  blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5);
+                  nralphainrangelow += 1;
+                  nralphainrangehigh += 1;
+                  }
+               else {
+                  blockerrlin2 += (srccolors[j][i] - alphatest[1]);
+                  nralphainrangehigh += 1;
+               }
+            }
+         }
+         /* shouldn't happen often, needed to avoid div by zero */
+         if (nralphainrangelow == 0) nralphainrangelow = 1;
+         if (nralphainrangehigh == 0) nralphainrangehigh = 1;
+         alphatest[0] = alphatest[0] + (blockerrlin1 / nralphainrangelow);
+#if RGTC_DEBUG
+	 fprintf(stderr, "block err lin low %d, nr %d\n", blockerrlin1, nralphainrangelow);
+         fprintf(stderr, "block err lin high %d, nr %d\n", blockerrlin2, nralphainrangehigh);
+#endif
+         /* again shouldn't really happen often... */
+         if (alphatest[0] < 0) {
+            alphatest[0] = 0;
+         }
+         alphatest[1] = alphatest[1] + (blockerrlin2 / nralphainrangehigh);
+         if (alphatest[1] > 255) {
+            alphatest[1] = 255;
+         }
+
+         alphablockerror3 = 0;
+         for (aindex = 0; aindex < 5; aindex++) {
+         /* don't forget here is always rounded down */
+            acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10;
+         }
+         for (j = 0; j < numypixels; j++) {
+            for (i = 0; i < numxpixels; i++) {
+                /* maybe it's overkill to have the most complicated calculation just for the error
+                  calculation which we only need to figure out if encoding1 or encoding2 is better... */
+               if (srccolors[j][i] <= alphatest[0] / 2) {
+                  alphaenc3[4*j + i] = 6;
+                  alphadist = srccolors[j][i];
+               }
+               else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) {
+                  alphaenc3[4*j + i] = 7;
+                  alphadist = 255 - srccolors[j][i];
+               }
+               else if (srccolors[j][i] <= acutValues[0]) {
+                  alphaenc3[4*j + i] = 0;
+                  alphadist = srccolors[j][i] - alphatest[0];
+               }
+               else if (srccolors[j][i] <= acutValues[1]) {
+                 alphaenc3[4*j + i] = 2;
+                 alphadist = srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[2]) {
+                  alphaenc3[4*j + i] = 3;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[3]) {
+                  alphaenc3[4*j + i] = 4;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5;
+               }
+               else if (srccolors[j][i] <= acutValues[4]) {
+                  alphaenc3[4*j + i] = 5;
+                  alphadist = srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5;
+               }
+               else {
+                  alphaenc3[4*j + i] = 1;
+                  alphadist = srccolors[j][i] - alphatest[1];
+               }
+               alphablockerror3 += alphadist * alphadist;
+            }
+         }
+      }
+   }
+  /* write the alpha values and encoding back. */
+   if ((alphablockerror1 <= alphablockerror2) && (alphablockerror1 <= alphablockerror3)) {
+#if RGTC_DEBUG
+      if (alphablockerror1 > 96) fprintf(stderr, "enc1 used, error %d\n", alphablockerror1);
+#endif
+      write_rgtc_encoded_channel_s( blkaddr, alphause[1], alphause[0], alphaenc1 );
+   }
+   else if (alphablockerror2 <= alphablockerror3) {
+#if RGTC_DEBUG
+      if (alphablockerror2 > 96) fprintf(stderr, "enc2 used, error %d\n", alphablockerror2);
+#endif
+      write_rgtc_encoded_channel_s( blkaddr, alphabase[0], alphabase[1], alphaenc2 );
+   }
+   else {
+#if RGTC_DEBUG
+      fprintf(stderr, "enc3 used, error %d\n", alphablockerror3);
+#endif
+      write_rgtc_encoded_channel_s( blkaddr, (GLubyte)alphatest[0], (GLubyte)alphatest[1], alphaenc3 );
+   }
+}
diff --git a/mesalib/src/mesa/main/texcompress_rgtc.h b/mesalib/src/mesa/main/texcompress_rgtc.h
new file mode 100644
index 000000000..424edc458
--- /dev/null
+++ b/mesalib/src/mesa/main/texcompress_rgtc.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2011 Red Hat 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 (including the next
+ * paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifndef TEXCOMPRESS_RGTC_H
+#define TEXCOMPRESS_RGTC_H
+
+#include "glheader.h"
+#include "mfeatures.h"
+#include "texstore.h"
+
+struct gl_texture_image;
+
+extern GLboolean
+_mesa_texstore_red_rgtc1(TEXSTORE_PARAMS);
+
+extern GLboolean
+_mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS);
+
+extern GLboolean
+_mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS);
+
+extern GLboolean
+_mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS);
+
+extern void
+_mesa_fetch_texel_2d_f_red_rgtc1(const struct gl_texture_image *texImage,
+				 GLint i, GLint j, GLint k, GLfloat *texel);
+
+extern void
+_mesa_fetch_texel_2d_f_signed_red_rgtc1(const struct gl_texture_image *texImage,
+					GLint i, GLint j, GLint k, GLfloat *texel);
+
+extern void
+_mesa_fetch_texel_2d_f_rg_rgtc2(const struct gl_texture_image *texImage,
+				 GLint i, GLint j, GLint k, GLfloat *texel);
+
+extern void
+_mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage,
+				       GLint i, GLint j, GLint k, GLfloat *texel);
+#endif
diff --git a/mesalib/src/mesa/main/texfetch.c b/mesalib/src/mesa/main/texfetch.c
index 1e7ea9480..8666076ab 100644
--- a/mesalib/src/mesa/main/texfetch.c
+++ b/mesalib/src/mesa/main/texfetch.c
@@ -38,6 +38,7 @@
 #include "texcompress.h"

 #include "texcompress_fxt1.h"

 #include "texcompress_s3tc.h"

+#include "texcompress_rgtc.h"

 #include "texfetch.h"

 #include "teximage.h"

 

@@ -756,7 +757,35 @@ texfetch_funcs[MESA_FORMAT_COUNT] =
       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

+   },

 };

 

 

diff --git a/mesalib/src/mesa/main/texformat.c b/mesalib/src/mesa/main/texformat.c
index 2542cea85..8040fac7d 100644
--- a/mesalib/src/mesa/main/texformat.c
+++ b/mesalib/src/mesa/main/texformat.c
@@ -1,608 +1,627 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.7
- *
- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (c) 2008-2009 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 texformat.c
- * Texture formats.
- *
- * \author Gareth Hughes
- * \author Brian Paul
- */
-
-
-#include "context.h"
-#include "mfeatures.h"
-#include "mtypes.h"
-#include "texcompress.h"
-#include "texformat.h"
-
-#define RETURN_IF_SUPPORTED(f) do {		\
-   if (ctx->TextureFormatSupported[f])		\
-      return f;					\
-} while (0)
-
-/**
- * Choose an appropriate texture format given the format, type and
- * internalFormat parameters passed to glTexImage().
- *
- * \param ctx  the GL context.
- * \param internalFormat  user's prefered internal texture format.
- * \param format  incoming image pixel format.
- * \param type  incoming image data type.
- *
- * \return a pointer to a gl_texture_format object which describes the
- * choosen texture format, or NULL on failure.
- * 
- * This is called via dd_function_table::ChooseTextureFormat.  Hardware drivers
- * will typically override this function with a specialized version.
- */
-gl_format
-_mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
-                         GLenum format, GLenum type )
-{
-   (void) format;
-   (void) type;
-
-   switch (internalFormat) {
-      /* shallow RGBA formats */
-      case 4:
-      case GL_RGBA:
-	 if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
-	 } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
-	 }
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-
-      case GL_RGBA8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      case GL_RGB5_A1:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
-	 break;
-      case GL_RGBA2:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
-	 break;
-      case GL_RGBA4:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
-	 break;
-
-      /* deep RGBA formats */
-      case GL_RGB10_A2:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      case GL_RGBA12:
-      case GL_RGBA16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-
-      /* shallow RGB formats */
-      case 3:
-      case GL_RGB:
-      case GL_RGB8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      case GL_R3_G3_B2:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      case GL_RGB4:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
-	 break;
-      case GL_RGB5:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
-	 break;
-
-      /* deep RGB formats */
-      case GL_RGB10:
-      case GL_RGB12:
-      case GL_RGB16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-
-      /* Alpha formats */
-      case GL_ALPHA:
-      case GL_ALPHA4:
-      case GL_ALPHA8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
-	 break;
-
-      case GL_ALPHA12:
-      case GL_ALPHA16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
-	 break;
-
-      /* Luminance formats */
-      case 1:
-      case GL_LUMINANCE:
-      case GL_LUMINANCE4:
-      case GL_LUMINANCE8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
-	 break;
-
-      case GL_LUMINANCE12:
-      case GL_LUMINANCE16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
-	 break;
-
-      /* Luminance/Alpha formats */
-      case GL_LUMINANCE4_ALPHA4:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
-	 break;
-
-      case 2:
-      case GL_LUMINANCE_ALPHA:
-      case GL_LUMINANCE6_ALPHA2:
-      case GL_LUMINANCE8_ALPHA8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
-	 break;
-
-      case GL_LUMINANCE12_ALPHA4:
-      case GL_LUMINANCE12_ALPHA12:
-      case GL_LUMINANCE16_ALPHA16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
-	 break;
-
-      case GL_INTENSITY:
-      case GL_INTENSITY4:
-      case GL_INTENSITY8:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
-	 break;
-
-      case GL_INTENSITY12:
-      case GL_INTENSITY16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
-	 break;
-
-      case GL_COLOR_INDEX:
-      case GL_COLOR_INDEX1_EXT:
-      case GL_COLOR_INDEX2_EXT:
-      case GL_COLOR_INDEX4_EXT:
-      case GL_COLOR_INDEX12_EXT:
-      case GL_COLOR_INDEX16_EXT:
-      case GL_COLOR_INDEX8_EXT:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_CI8);
-	 break;
-
-      default:
-         ; /* fallthrough */
-   }
-
-   if (ctx->Extensions.ARB_depth_texture) {
-      switch (internalFormat) {
-         case GL_DEPTH_COMPONENT:
-         case GL_DEPTH_COMPONENT24:
-         case GL_DEPTH_COMPONENT32:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
-	    break;
-         case GL_DEPTH_COMPONENT16:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   switch (internalFormat) {
-      case GL_COMPRESSED_ALPHA_ARB:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
-	 break;
-      case GL_COMPRESSED_LUMINANCE_ARB:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
-	 break;
-      case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
-	 break;
-      case GL_COMPRESSED_INTENSITY_ARB:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
-	 break;
-      case GL_COMPRESSED_RGB_ARB:
-         if (ctx->Extensions.EXT_texture_compression_s3tc ||
-             ctx->Extensions.S3_s3tc)
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
-         if (ctx->Extensions.TDFX_texture_compression_FXT1)
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      case GL_COMPRESSED_RGBA_ARB:
-         if (ctx->Extensions.EXT_texture_compression_s3tc ||
-             ctx->Extensions.S3_s3tc)
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
-         if (ctx->Extensions.TDFX_texture_compression_FXT1)
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-      default:
-         ; /* fallthrough */
-   }
-
-   if (ctx->Extensions.MESA_ycbcr_texture) {
-      if (internalFormat == GL_YCBCR_MESA) {
-         if (type == GL_UNSIGNED_SHORT_8_8_MESA)
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
-         else
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
-      }
-   }
-
-#if FEATURE_texture_fxt1
-   if (ctx->Extensions.TDFX_texture_compression_FXT1) {
-      switch (internalFormat) {
-         case GL_COMPRESSED_RGB_FXT1_3DFX:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
-	 break;
-         case GL_COMPRESSED_RGBA_FXT1_3DFX:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
-	 break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif
-
-#if FEATURE_texture_s3tc
-   if (ctx->Extensions.EXT_texture_compression_s3tc) {
-      switch (internalFormat) {
-         case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
-	    break;
-         case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);
-	    break;
-         case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
-	    break;
-         case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.S3_s3tc) {
-      switch (internalFormat) {
-         case GL_RGB_S3TC:
-         case GL_RGB4_S3TC:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
-	    break;
-         case GL_RGBA_S3TC:
-         case GL_RGBA4_S3TC:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif
-
-   if (ctx->Extensions.ARB_texture_float) {
-      switch (internalFormat) {
-         case GL_ALPHA16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
-	    break;
-         case GL_ALPHA32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
-	    break;
-         case GL_LUMINANCE16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
-	    break;
-         case GL_LUMINANCE32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
-	    break;
-         case GL_LUMINANCE_ALPHA16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
-	    break;
-         case GL_LUMINANCE_ALPHA32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
-	    break;
-         case GL_INTENSITY16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
-	    break;
-         case GL_INTENSITY32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
-	    break;
-         case GL_RGB16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
-	    break;
-         case GL_RGB32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
-	    break;
-         case GL_RGBA16F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
-	    break;
-         case GL_RGBA32F_ARB:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.EXT_packed_depth_stencil) {
-      switch (internalFormat) {
-         case GL_DEPTH_STENCIL_EXT:
-         case GL_DEPTH24_STENCIL8_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.ATI_envmap_bumpmap) {
-      switch (internalFormat) {
-         case GL_DUDV_ATI:
-         case GL_DU8DV8_ATI:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.MESA_texture_signed_rgba) {
-      switch (internalFormat) {
-         case GL_RGBA_SNORM:
-         case GL_RGBA8_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
-	    break;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) {
-      switch (internalFormat) {
-         case GL_RED_SNORM:
-         case GL_R8_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
-	    break;
-         case GL_RG_SNORM:
-         case GL_RG8_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88);
-	    break;
-         case GL_RGB_SNORM:
-         case GL_RGB8_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
-	    break;
-         case GL_RGBA_SNORM:
-         case GL_RGBA8_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
-	    break;
-         case GL_R16_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R_16);
-	    break;
-         case GL_RG16_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_16);
-	    break;
-         case GL_RGB16_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
-	    break;
-         case GL_RGBA16_SNORM:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
-	    break;
-         default:
-            ; /* fall-through */
-      }
-   }
-
-#if FEATURE_EXT_texture_sRGB
-   if (ctx->Extensions.EXT_texture_sRGB) {
-      switch (internalFormat) {
-         case GL_SRGB_EXT:
-         case GL_SRGB8_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_SRGB_ALPHA_EXT:
-         case GL_SRGB8_ALPHA8_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_SLUMINANCE_EXT:
-         case GL_SLUMINANCE8_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_SLUMINANCE_ALPHA_EXT:
-         case GL_SLUMINANCE8_ALPHA8_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_COMPRESSED_SLUMINANCE_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_COMPRESSED_SRGB_EXT:
-#if FEATURE_texture_s3tc
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
-#endif
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-         case GL_COMPRESSED_SRGB_ALPHA_EXT:
-#if FEATURE_texture_s3tc
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
-#endif
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-	    break;
-#if FEATURE_texture_s3tc
-         case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);
-	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
-            break;
-#endif
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif /* FEATURE_EXT_texture_sRGB */
-
-   if (ctx->Extensions.EXT_texture_integer) {
-      switch (internalFormat) {
-      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:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
-	 break;
-      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:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
-	 break;
-      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:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
-	 break;
-      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:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
-	 break;
-      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:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
-	 break;
-      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_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
-	 break;
-      }
-   }
-
-   if (ctx->Extensions.ARB_texture_rg) {
-      switch (internalFormat) {
-      case GL_R8:
-      case GL_RED:
-      case GL_COMPRESSED_RED:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
-	 break;
-
-      case GL_R16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
-	 break;
-
-      case GL_RG:
-      case GL_RG8:
-      case GL_COMPRESSED_RG:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
-	 break;
-
-      case GL_RG16:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);
-	 break;
-
-      default:
-         ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.EXT_texture_format_BGRA8888) {
-      switch (internalFormat) {
-      case GL_BGRA:
-	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
-	 break;
-
-      default:
-         ; /* fallthrough */
-      }
-   }
-
-   _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
-   return MESA_FORMAT_NONE;
-}
-
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.7

+ *

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

+ * Copyright (c) 2008-2009 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 texformat.c

+ * Texture formats.

+ *

+ * \author Gareth Hughes

+ * \author Brian Paul

+ */

+

+

+#include "context.h"

+#include "mfeatures.h"

+#include "mtypes.h"

+#include "texcompress.h"

+#include "texformat.h"

+

+#define RETURN_IF_SUPPORTED(f) do {		\

+   if (ctx->TextureFormatSupported[f])		\

+      return f;					\

+} while (0)

+

+/**

+ * Choose an appropriate texture format given the format, type and

+ * internalFormat parameters passed to glTexImage().

+ *

+ * \param ctx  the GL context.

+ * \param internalFormat  user's prefered internal texture format.

+ * \param format  incoming image pixel format.

+ * \param type  incoming image data type.

+ *

+ * \return a pointer to a gl_texture_format object which describes the

+ * choosen texture format, or NULL on failure.

+ * 

+ * This is called via dd_function_table::ChooseTextureFormat.  Hardware drivers

+ * will typically override this function with a specialized version.

+ */

+gl_format

+_mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,

+                         GLenum format, GLenum type )

+{

+   (void) format;

+   (void) type;

+

+   switch (internalFormat) {

+      /* shallow RGBA formats */

+      case 4:

+      case GL_RGBA:

+	 if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);

+	 } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);

+	 }

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+

+      case GL_RGBA8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      case GL_RGB5_A1:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);

+	 break;

+      case GL_RGBA2:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);

+	 break;

+      case GL_RGBA4:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);

+	 break;

+

+      /* deep RGBA formats */

+      case GL_RGB10_A2:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      case GL_RGBA12:

+      case GL_RGBA16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+

+      /* shallow RGB formats */

+      case 3:

+      case GL_RGB:

+      case GL_RGB8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      case GL_R3_G3_B2:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      case GL_RGB4:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);

+	 break;

+      case GL_RGB5:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);

+	 break;

+

+      /* deep RGB formats */

+      case GL_RGB10:

+      case GL_RGB12:

+      case GL_RGB16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+

+      /* Alpha formats */

+      case GL_ALPHA:

+      case GL_ALPHA4:

+      case GL_ALPHA8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);

+	 break;

+

+      case GL_ALPHA12:

+      case GL_ALPHA16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_A16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);

+	 break;

+

+      /* Luminance formats */

+      case 1:

+      case GL_LUMINANCE:

+      case GL_LUMINANCE4:

+      case GL_LUMINANCE8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);

+	 break;

+

+      case GL_LUMINANCE12:

+      case GL_LUMINANCE16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_L16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);

+	 break;

+

+      /* Luminance/Alpha formats */

+      case GL_LUMINANCE4_ALPHA4:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);

+	 break;

+

+      case 2:

+      case GL_LUMINANCE_ALPHA:

+      case GL_LUMINANCE6_ALPHA2:

+      case GL_LUMINANCE8_ALPHA8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);

+	 break;

+

+      case GL_LUMINANCE12_ALPHA4:

+      case GL_LUMINANCE12_ALPHA12:

+      case GL_LUMINANCE16_ALPHA16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);

+	 break;

+

+      case GL_INTENSITY:

+      case GL_INTENSITY4:

+      case GL_INTENSITY8:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);

+	 break;

+

+      case GL_INTENSITY12:

+      case GL_INTENSITY16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_I16);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);

+	 break;

+

+      case GL_COLOR_INDEX:

+      case GL_COLOR_INDEX1_EXT:

+      case GL_COLOR_INDEX2_EXT:

+      case GL_COLOR_INDEX4_EXT:

+      case GL_COLOR_INDEX12_EXT:

+      case GL_COLOR_INDEX16_EXT:

+      case GL_COLOR_INDEX8_EXT:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_CI8);

+	 break;

+

+      default:

+         ; /* fallthrough */

+   }

+

+   if (ctx->Extensions.ARB_depth_texture) {

+      switch (internalFormat) {

+         case GL_DEPTH_COMPONENT:

+         case GL_DEPTH_COMPONENT24:

+         case GL_DEPTH_COMPONENT32:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);

+	    break;

+         case GL_DEPTH_COMPONENT16:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   switch (internalFormat) {

+      case GL_COMPRESSED_ALPHA_ARB:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);

+	 break;

+      case GL_COMPRESSED_LUMINANCE_ARB:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);

+	 break;

+      case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);

+	 break;

+      case GL_COMPRESSED_INTENSITY_ARB:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);

+	 break;

+      case GL_COMPRESSED_RGB_ARB:

+         if (ctx->Extensions.EXT_texture_compression_s3tc ||

+             ctx->Extensions.S3_s3tc)

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);

+         if (ctx->Extensions.TDFX_texture_compression_FXT1)

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      case GL_COMPRESSED_RGBA_ARB:

+         if (ctx->Extensions.EXT_texture_compression_s3tc ||

+             ctx->Extensions.S3_s3tc)

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */

+         if (ctx->Extensions.TDFX_texture_compression_FXT1)

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+      default:

+         ; /* fallthrough */

+   }

+

+   if (ctx->Extensions.MESA_ycbcr_texture) {

+      if (internalFormat == GL_YCBCR_MESA) {

+         if (type == GL_UNSIGNED_SHORT_8_8_MESA)

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);

+         else

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);

+      }

+   }

+

+#if FEATURE_texture_fxt1

+   if (ctx->Extensions.TDFX_texture_compression_FXT1) {

+      switch (internalFormat) {

+         case GL_COMPRESSED_RGB_FXT1_3DFX:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);

+	 break;

+         case GL_COMPRESSED_RGBA_FXT1_3DFX:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);

+	 break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif

+

+#if FEATURE_texture_s3tc

+   if (ctx->Extensions.EXT_texture_compression_s3tc) {

+      switch (internalFormat) {

+         case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);

+	    break;

+         case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);

+	    break;

+         case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);

+	    break;

+         case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.S3_s3tc) {

+      switch (internalFormat) {

+         case GL_RGB_S3TC:

+         case GL_RGB4_S3TC:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);

+	    break;

+         case GL_RGBA_S3TC:

+         case GL_RGBA4_S3TC:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif

+

+   if (ctx->Extensions.ARB_texture_float) {

+      switch (internalFormat) {

+         case GL_ALPHA16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);

+	    break;

+         case GL_ALPHA32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);

+	    break;

+         case GL_LUMINANCE16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);

+	    break;

+         case GL_LUMINANCE32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);

+	    break;

+         case GL_LUMINANCE_ALPHA16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);

+	    break;

+         case GL_LUMINANCE_ALPHA32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);

+	    break;

+         case GL_INTENSITY16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);

+	    break;

+         case GL_INTENSITY32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);

+	    break;

+         case GL_RGB16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);

+	    break;

+         case GL_RGB32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);

+	    break;

+         case GL_RGBA16F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);

+	    break;

+         case GL_RGBA32F_ARB:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.EXT_packed_depth_stencil) {

+      switch (internalFormat) {

+         case GL_DEPTH_STENCIL_EXT:

+         case GL_DEPTH24_STENCIL8_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.ATI_envmap_bumpmap) {

+      switch (internalFormat) {

+         case GL_DUDV_ATI:

+         case GL_DU8DV8_ATI:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.MESA_texture_signed_rgba) {

+      switch (internalFormat) {

+         case GL_RGBA_SNORM:

+         case GL_RGBA8_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) {

+      switch (internalFormat) {

+         case GL_RED_SNORM:

+         case GL_R8_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);

+	    break;

+         case GL_RG_SNORM:

+         case GL_RG8_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88);

+	    break;

+         case GL_RGB_SNORM:

+         case GL_RGB8_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);

+	    break;

+         case GL_RGBA_SNORM:

+         case GL_RGBA8_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);

+	    break;

+         case GL_R16_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R_16);

+	    break;

+         case GL_RG16_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_16);

+	    break;

+         case GL_RGB16_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);

+	    break;

+         case GL_RGBA16_SNORM:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);

+	    break;

+         default:

+            ; /* fall-through */

+      }

+   }

+

+#if FEATURE_EXT_texture_sRGB

+   if (ctx->Extensions.EXT_texture_sRGB) {

+      switch (internalFormat) {

+         case GL_SRGB_EXT:

+         case GL_SRGB8_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_SRGB_ALPHA_EXT:

+         case GL_SRGB8_ALPHA8_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_SLUMINANCE_EXT:

+         case GL_SLUMINANCE8_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_SLUMINANCE_ALPHA_EXT:

+         case GL_SLUMINANCE8_ALPHA8_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_COMPRESSED_SLUMINANCE_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_COMPRESSED_SRGB_EXT:

+#if FEATURE_texture_s3tc

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);

+#endif

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+         case GL_COMPRESSED_SRGB_ALPHA_EXT:

+#if FEATURE_texture_s3tc

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */

+#endif

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+	    break;

+#if FEATURE_texture_s3tc

+         case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+	       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);

+            break;

+#endif

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif /* FEATURE_EXT_texture_sRGB */

+

+   if (ctx->Extensions.EXT_texture_integer) {

+      switch (internalFormat) {

+      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:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);

+	 break;

+      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:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);

+	 break;

+      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:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);

+	 break;

+      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:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);

+	 break;

+      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:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);

+	 break;

+      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_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);

+	 break;

+      }

+   }

+

+   if (ctx->Extensions.ARB_texture_rg) {

+      switch (internalFormat) {

+      case GL_R8:

+      case GL_RED:

+      case GL_COMPRESSED_RED:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_R8);

+	 break;

+

+      case GL_R16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_R16);

+	 break;

+

+      case GL_RG:

+      case GL_RG8:

+      case GL_COMPRESSED_RG:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);

+	 break;

+

+      case GL_RG16:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);

+	 break;

+

+      default:

+         ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.EXT_texture_format_BGRA8888) {

+      switch (internalFormat) {

+      case GL_BGRA:

+	 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);

+	 break;

+

+      default:

+         ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.ARB_texture_compression_rgtc) {

+      switch (internalFormat) {

+         case GL_COMPRESSED_RED_RGTC1:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);

+	    break;

+         case GL_COMPRESSED_SIGNED_RED_RGTC1:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RED_RGTC1);

+	    break;

+         case GL_COMPRESSED_RG_RGTC2:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);

+	    break;

+         case GL_COMPRESSED_SIGNED_RG_RGTC2:

+	    RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_RGTC2);

+	    break;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");

+   return MESA_FORMAT_NONE;

+}

+

diff --git a/mesalib/src/mesa/main/texstore.c b/mesalib/src/mesa/main/texstore.c
index 1947d32e6..60ded5852 100644
--- a/mesalib/src/mesa/main/texstore.c
+++ b/mesalib/src/mesa/main/texstore.c
@@ -65,6 +65,7 @@
 #include "pack.h"

 #include "texcompress.h"

 #include "texcompress_fxt1.h"

+#include "texcompress_rgtc.h"

 #include "texcompress_s3tc.h"

 #include "teximage.h"

 #include "texstore.h"

@@ -310,15 +311,15 @@ compute_component_mapping(GLenum inFormat, GLenum outFormat,
  * \param srcPacking  source image pixel packing

  * \return resulting image with format = textureBaseFormat and type = GLfloat.

  */

-static GLfloat *

-make_temp_float_image(struct gl_context *ctx, GLuint dims,

-                      GLenum logicalBaseFormat,

-                      GLenum textureBaseFormat,

-                      GLint srcWidth, GLint srcHeight, GLint srcDepth,

-                      GLenum srcFormat, GLenum srcType,

-                      const GLvoid *srcAddr,

-                      const struct gl_pixelstore_attrib *srcPacking,

-                      GLbitfield transferOps)

+GLfloat *

+_mesa_make_temp_float_image(struct gl_context *ctx, GLuint dims,

+			    GLenum logicalBaseFormat,

+			    GLenum textureBaseFormat,

+			    GLint srcWidth, GLint srcHeight, GLint srcDepth,

+			    GLenum srcFormat, GLenum srcType,

+			    const GLvoid *srcAddr,

+			    const struct gl_pixelstore_attrib *srcPacking,

+			    GLbitfield transferOps)

 {

    GLfloat *tempImage;

    const GLint components = _mesa_components_in_format(logicalBaseFormat);

@@ -2065,7 +2066,7 @@ _mesa_texstore_argb2101010(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2317,7 +2318,7 @@ _mesa_texstore_unorm1616(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2394,7 +2395,7 @@ _mesa_texstore_unorm16(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2452,7 +2453,7 @@ _mesa_texstore_rgba_16(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2519,7 +2520,7 @@ _mesa_texstore_signed_rgba_16(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2901,7 +2902,7 @@ _mesa_texstore_signed_r8(TEXSTORE_PARAMS)
    /* XXX look at adding optimized paths */

    {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2946,7 +2947,7 @@ _mesa_texstore_signed_rg88(TEXSTORE_PARAMS)
    /* XXX look at adding optimized paths */

    {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -2991,7 +2992,7 @@ _mesa_texstore_signed_rgbx8888(TEXSTORE_PARAMS)
 

    {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3104,7 +3105,7 @@ _mesa_texstore_signed_rgba8888(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3413,7 +3414,7 @@ _mesa_texstore_rgba_float32(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3483,7 +3484,7 @@ _mesa_texstore_rgba_float16(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3549,7 +3550,7 @@ _mesa_texstore_rgba_int8(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3614,7 +3615,7 @@ _mesa_texstore_rgba_int16(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -3679,7 +3680,7 @@ _mesa_texstore_rgba_int32(TEXSTORE_PARAMS)
    }

    else {

       /* general path */

-      const GLfloat *tempImage = make_temp_float_image(ctx, dims,

+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,

                                                  baseInternalFormat,

                                                  baseFormat,

                                                  srcWidth, srcHeight, srcDepth,

@@ -4128,7 +4129,12 @@ texstore_funcs[MESA_FORMAT_COUNT] =
    { MESA_FORMAT_SIGNED_RG_16, _mesa_texstore_signed_rgba_16 },

    { MESA_FORMAT_SIGNED_RGB_16, _mesa_texstore_signed_rgba_16 },

    { MESA_FORMAT_SIGNED_RGBA_16, _mesa_texstore_signed_rgba_16 },

-   { MESA_FORMAT_RGBA_16, _mesa_texstore_rgba_16 }

+   { MESA_FORMAT_RGBA_16, _mesa_texstore_rgba_16 },

+

+   { MESA_FORMAT_RED_RGTC1, _mesa_texstore_red_rgtc1 },

+   { MESA_FORMAT_SIGNED_RED_RGTC1, _mesa_texstore_signed_red_rgtc1 },

+   { MESA_FORMAT_RG_RGTC2, _mesa_texstore_rg_rgtc2 },

+   { MESA_FORMAT_SIGNED_RG_RGTC2, _mesa_texstore_signed_rg_rgtc2 }

 };

 

 

diff --git a/mesalib/src/mesa/main/texstore.h b/mesalib/src/mesa/main/texstore.h
index 8640a23a7..35339da77 100644
--- a/mesalib/src/mesa/main/texstore.h
+++ b/mesalib/src/mesa/main/texstore.h
@@ -81,6 +81,15 @@ _mesa_make_temp_chan_image(struct gl_context *ctx, GLuint dims,
                            const GLvoid *srcAddr,

                            const struct gl_pixelstore_attrib *srcPacking);

 

+GLfloat *

+_mesa_make_temp_float_image(struct gl_context *ctx, GLuint dims,

+			    GLenum logicalBaseFormat,

+			    GLenum textureBaseFormat,

+			    GLint srcWidth, GLint srcHeight, GLint srcDepth,

+			    GLenum srcFormat, GLenum srcType,

+			    const GLvoid *srcAddr,

+			    const struct gl_pixelstore_attrib *srcPacking,

+			    GLbitfield transferOps);

 

 extern void

 _mesa_store_teximage1d(struct gl_context *ctx, GLenum target, GLint level,