xkeyboard-config libX11 pixman mesa git update 25 May 2011

2 files changed, 2207 insertions, 2643 deletions

diff --git a/mesalib/src/mesa/main/texgetimage.c b/mesalib/src/mesa/main/texgetimage.c
index 6060e5b3d..97d101225 100644
--- a/mesalib/src/mesa/main/texgetimage.c
+++ b/mesalib/src/mesa/main/texgetimage.c
@@ -1,951 +1,869 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.7

- *

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

- * Copyright (c) 2009 VMware, Inc.

- *

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the "Software"),

- * to deal in the Software without restriction, including without limitation

- * the rights to use, copy, modify, merge, publish, distribute, sublicense,

- * and/or sell copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following conditions:

- *

- * The above copyright notice and this permission notice shall be included

- * in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- */

-

-

-/**

- * Code for glGetTexImage() and glGetCompressedTexImage().

- */

-

-

-#include "glheader.h"

-#include "bufferobj.h"

-#include "enums.h"

-#include "context.h"

-#include "formats.h"

-#include "image.h"

-#include "mfeatures.h"

-#include "mtypes.h"

-#include "pack.h"

-#include "pbo.h"

-#include "texgetimage.h"

-#include "teximage.h"

-

-

-

-/**

- * Can the given type represent negative values?

- */

-static INLINE GLboolean

-type_with_negative_values(GLenum type)

-{

-   switch (type) {

-   case GL_BYTE:

-   case GL_SHORT:

-   case GL_INT:

-   case GL_FLOAT:

-   case GL_HALF_FLOAT_ARB:

-      return GL_TRUE;

-   default:

-      return GL_FALSE;

-   }

-}

-

-

-/**

- * glGetTexImage for color index pixels.

- */

-static void

-get_tex_color_index(struct gl_context *ctx, GLuint dimensions,

-                    GLenum format, GLenum type, GLvoid *pixels,

-                    const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   const GLint rowstride = texImage->RowStride;

-   const GLuint indexBits =

-      _mesa_get_format_bits(texImage->TexFormat, GL_TEXTURE_INDEX_SIZE_EXT);

-   const GLbitfield transferOps = 0x0;

-   GLint img, row, col;

-

-   for (img = 0; img < depth; img++) {

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

-         GLuint indexRow[MAX_WIDTH] = { 0 };

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-         assert(dest);

-

-         if (indexBits == 8) {

-            const GLubyte *src = (const GLubyte *) texImage->Data;

-            src += rowstride * (img * height + row);

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

-               indexRow[col] = src[col];

-            }

-         }

-         else if (indexBits == 16) {

-            const GLushort *src = (const GLushort *) texImage->Data;

-            src += rowstride * (img * height + row);

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

-               indexRow[col] = src[col];

-            }

-         }

-         else {

-            _mesa_problem(ctx, "Color index problem in _mesa_GetTexImage");

-         }

-         _mesa_pack_index_span(ctx, width, type, dest,

-                               indexRow, &ctx->Pack, transferOps);

-      }

-   }

-}

-

-

-/**

- * glGetTexImage for depth/Z pixels.

- */

-static void

-get_tex_depth(struct gl_context *ctx, GLuint dimensions,

-              GLenum format, GLenum type, GLvoid *pixels,

-              const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   GLint img, row, col;

-   GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat));

-

-   if (!depthRow) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");

-      return;

-   }

-

-   for (img = 0; img < depth; img++) {

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

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-         assert(dest);

-

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

-            texImage->FetchTexelf(texImage, col, row, img, depthRow + col);

-         }

-         _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack);

-      }

-   }

-

-   free(depthRow);

-}

-

-

-/**

- * glGetTexImage for depth/stencil pixels.

- */

-static void

-get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions,

-                      GLenum format, GLenum type, GLvoid *pixels,

-                      const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   const GLint rowstride = texImage->RowStride;

-   const GLuint *src = (const GLuint *) texImage->Data;

-   GLint img, row;

-

-   for (img = 0; img < depth; img++) {

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

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-         memcpy(dest, src, width * sizeof(GLuint));

-         if (ctx->Pack.SwapBytes) {

-            _mesa_swap4((GLuint *) dest, width);

-         }

-

-         src += rowstride;

-      }

-   }

-}

-

-

-/**

- * glGetTexImage for YCbCr pixels.

- */

-static void

-get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions,

-              GLenum format, GLenum type, GLvoid *pixels,

-              const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   const GLint rowstride = texImage->RowStride;

-   const GLushort *src = (const GLushort *) texImage->Data;

-   GLint img, row;

-

-   for (img = 0; img < depth; img++) {

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

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-         memcpy(dest, src, width * sizeof(GLushort));

-

-         /* check for byte swapping */

-         if ((texImage->TexFormat == MESA_FORMAT_YCBCR

-              && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||

-             (texImage->TexFormat == MESA_FORMAT_YCBCR_REV

-              && type == GL_UNSIGNED_SHORT_8_8_MESA)) {

-            if (!ctx->Pack.SwapBytes)

-               _mesa_swap2((GLushort *) dest, width);

-         }

-         else if (ctx->Pack.SwapBytes) {

-            _mesa_swap2((GLushort *) dest, width);

-         }

-

-         src += rowstride;

-      }

-   }

-}

-

-

-#if FEATURE_EXT_texture_sRGB

-

-

-/**

- * Convert a float value from linear space to a

- * non-linear sRGB value in [0, 255].

- * Not terribly efficient.

- */

-static INLINE GLfloat

-linear_to_nonlinear(GLfloat cl)

-{

-   /* can't have values outside [0, 1] */

-   GLfloat cs;

-   if (cl < 0.0031308f) {

-      cs = 12.92f * cl;

-   }

-   else {

-      cs = (GLfloat)(1.055 * pow(cl, 0.41666) - 0.055);

-   }

-   return cs;

-}

-

-

-/**

- * glGetTexImagefor sRGB pixels;

- */

-static void

-get_tex_srgb(struct gl_context *ctx, GLuint dimensions,

-             GLenum format, GLenum type, GLvoid *pixels,

-             const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   const GLbitfield transferOps = 0x0;

-   GLint img, row;

-   GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));

-

-   if (!rgba) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");

-      return;

-   }

-

-   for (img = 0; img < depth; img++) {

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

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-

-         GLint col;

-

-         /* convert row to RGBA format */

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

-            texImage->FetchTexelf(texImage, col, row, img, rgba[col]);

-            if (texImage->_BaseFormat == GL_LUMINANCE) {

-               rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);

-               rgba[col][GCOMP] = 0.0;

-               rgba[col][BCOMP] = 0.0;

-            }

-            else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {

-               rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);

-               rgba[col][GCOMP] = 0.0;

-               rgba[col][BCOMP] = 0.0;

-            }

-            else if (texImage->_BaseFormat == GL_RGB ||

-                     texImage->_BaseFormat == GL_RGBA) {

-               rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);

-               rgba[col][GCOMP] = linear_to_nonlinear(rgba[col][GCOMP]);

-               rgba[col][BCOMP] = linear_to_nonlinear(rgba[col][BCOMP]);

-            }

-         }

-         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,

-                                    format, type, dest,

-                                    &ctx->Pack, transferOps);

-      }

-   }

-

-   free(rgba);

-}

-

-

-#else /* FEATURE_EXT_texture_sRGB */

-

-

-static INLINE void

-get_tex_srgb(struct gl_context *ctx, GLuint dimensions,

-             GLenum format, GLenum type, GLvoid *pixels,

-             const struct gl_texture_image *texImage)

-{

-   ASSERT_NO_FEATURE();

-}

-

-

-#endif /* FEATURE_EXT_texture_sRGB */

-

-

-/**

- * glGetTexImagefor RGBA, Luminance, etc. pixels.

- * This is the slow way since we use texture sampling.

- */

-static void

-get_tex_rgba(struct gl_context *ctx, GLuint dimensions,

-             GLenum format, GLenum type, GLvoid *pixels,

-             const struct gl_texture_image *texImage)

-{

-   const GLint width = texImage->Width;

-   const GLint height = texImage->Height;

-   const GLint depth = texImage->Depth;

-   /* Normally, no pixel transfer ops are performed during glGetTexImage.

-    * The only possible exception is component clamping to [0,1].

-    */

-   GLbitfield transferOps = 0x0;

-   GLint img, row;

-   GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));

-

-   if (!rgba) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");

-      return;

-   }

-

-   for (img = 0; img < depth; img++) {

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

-         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,

-                                          width, height, format, type,

-                                          img, row, 0);

-         GLint col;

-         GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat);

-

-         /* clamp does not apply to GetTexImage (final conversion)?

-          * Looks like we need clamp though when going from format

-          * containing negative values to unsigned format.

-          */

-         if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) {

-            transferOps |= IMAGE_CLAMP_BIT;

-         }

-         else if (!type_with_negative_values(type) &&

-                  (dataType == GL_FLOAT ||

-                   dataType == GL_SIGNED_NORMALIZED)) {

-            transferOps |= IMAGE_CLAMP_BIT;

-         }

-

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

-            texImage->FetchTexelf(texImage, col, row, img, rgba[col]);

-            if (texImage->_BaseFormat == GL_ALPHA) {

-               rgba[col][RCOMP] = 0.0F;

-               rgba[col][GCOMP] = 0.0F;

-               rgba[col][BCOMP] = 0.0F;

-            }

-            else if (texImage->_BaseFormat == GL_LUMINANCE) {

-               rgba[col][GCOMP] = 0.0F;

-               rgba[col][BCOMP] = 0.0F;

-               rgba[col][ACOMP] = 1.0F;

-            }

-            else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {

-               rgba[col][GCOMP] = 0.0F;

-               rgba[col][BCOMP] = 0.0F;

-            }

-            else if (texImage->_BaseFormat == GL_INTENSITY) {

-               rgba[col][GCOMP] = 0.0F;

-               rgba[col][BCOMP] = 0.0F;

-               rgba[col][ACOMP] = 1.0F;

-            }

-         }

-         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,

-                                    format, type, dest,

-                                    &ctx->Pack, transferOps);

-      }

-   }

-

-   free(rgba);

-}

-

-

-/**

- * Try to do glGetTexImage() with simple memcpy().

- * \return GL_TRUE if done, GL_FALSE otherwise

- */

-static GLboolean

-get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels,

-               const struct gl_texture_object *texObj,

-               const struct gl_texture_image *texImage)

-{

-   GLboolean memCopy = GL_FALSE;

-

-   /* Texture image should have been mapped already */

-   assert(texImage->Data);

-

-   /*

-    * Check if the src/dst formats are compatible.

-    * Also note that GL's pixel transfer ops don't apply to glGetTexImage()

-    * so we don't have to worry about those.

-    * XXX more format combinations could be supported here.

-    */

-   if ((texObj->Target == GL_TEXTURE_1D ||

-        texObj->Target == GL_TEXTURE_2D ||

-        texObj->Target == GL_TEXTURE_RECTANGLE ||

-        (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&

-         texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) {

-      if ((texImage->TexFormat == MESA_FORMAT_ARGB8888 ||

-             texImage->TexFormat == MESA_FORMAT_SARGB8) &&

-          format == GL_BGRA &&

-          (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) &&

-          !ctx->Pack.SwapBytes &&

-          _mesa_little_endian()) {

-         memCopy = GL_TRUE;

-      }

-      else if ((texImage->TexFormat == MESA_FORMAT_AL88 ||

-                  texImage->TexFormat == MESA_FORMAT_SLA8) &&

-               format == GL_LUMINANCE_ALPHA &&

-               type == GL_UNSIGNED_BYTE &&

-               !ctx->Pack.SwapBytes &&

-               _mesa_little_endian()) {

-         memCopy = GL_TRUE;

-      }

-      else if ((texImage->TexFormat == MESA_FORMAT_L8 ||

-                  texImage->TexFormat == MESA_FORMAT_SL8) &&

-               format == GL_LUMINANCE &&

-               type == GL_UNSIGNED_BYTE) {

-         memCopy = GL_TRUE;

-      }

-      else if (texImage->TexFormat == MESA_FORMAT_L16 &&

-               format == GL_LUMINANCE &&

-               type == GL_UNSIGNED_SHORT) {

-         memCopy = GL_TRUE;

-      }

-      else if (texImage->TexFormat == MESA_FORMAT_A8 &&

-               format == GL_ALPHA &&

-               type == GL_UNSIGNED_BYTE) {

-         memCopy = GL_TRUE;

-      }

-      else if (texImage->TexFormat == MESA_FORMAT_A16 &&

-               format == GL_ALPHA &&

-               type == GL_UNSIGNED_SHORT) {

-         memCopy = GL_TRUE;

-      }

-   }

-

-   if (memCopy) {

-      const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);

-      const GLuint bytesPerRow = texImage->Width * bpp;

-      GLubyte *dst =

-         _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width,

-                               texImage->Height, format, type, 0, 0);

-      const GLint dstRowStride =

-         _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type);

-      const GLubyte *src = texImage->Data;

-      const GLint srcRowStride = texImage->RowStride * bpp;

-      GLuint row;

-

-      if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {

-         memcpy(dst, src, bytesPerRow * texImage->Height);

-      }

-      else {

-         for (row = 0; row < texImage->Height; row++) {

-            memcpy(dst, src, bytesPerRow);

-            dst += dstRowStride;

-            src += srcRowStride;

-         }

-      }

-   }

-

-   return memCopy;

-}

-

-

-/**

- * This is the software fallback for Driver.GetTexImage().

- * All error checking will have been done before this routine is called.

- * The texture image must be mapped.

- */

-void

-_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level,

-                   GLenum format, GLenum type, GLvoid *pixels,

-                   struct gl_texture_object *texObj,

-                   struct gl_texture_image *texImage)

-{

-   GLuint dimensions;

-

-   /* If we get here, the texture image should be mapped */

-   assert(texImage->Data);

-

-   switch (target) {

-   case GL_TEXTURE_1D:

-      dimensions = 1;

-      break;

-   case GL_TEXTURE_3D:

-      dimensions = 3;

-      break;

-   default:

-      dimensions = 2;

-   }

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      /* Packing texture image into a PBO.

-       * Map the (potentially) VRAM-based buffer into our process space so

-       * we can write into it with the code below.

-       * A hardware driver might use a sophisticated blit to move the

-       * texture data to the PBO if the PBO is in VRAM along with the texture.

-       */

-      GLubyte *buf = (GLubyte *)

-         ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,

-                               GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);

-      if (!buf) {

-         /* out of memory or other unexpected error */

-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)");

-         return;

-      }

-      /* <pixels> was an offset into the PBO.

-       * Now make it a real, client-side pointer inside the mapped region.

-       */

-      pixels = ADD_POINTERS(buf, pixels);

-   }

-

-   if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) {

-      /* all done */

-   }

-   else if (format == GL_COLOR_INDEX) {

-      get_tex_color_index(ctx, dimensions, format, type, pixels, texImage);

-   }

-   else if (format == GL_DEPTH_COMPONENT) {

-      get_tex_depth(ctx, dimensions, format, type, pixels, texImage);

-   }

-   else if (format == GL_DEPTH_STENCIL_EXT) {

-      get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage);

-   }

-   else if (format == GL_YCBCR_MESA) {

-      get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage);

-   }

-   else if (_mesa_get_format_color_encoding(texImage->TexFormat) == GL_SRGB) {

-      get_tex_srgb(ctx, dimensions, format, type, pixels, texImage);

-   }

-   else {

-      get_tex_rgba(ctx, dimensions, format, type, pixels, texImage);

-   }

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,

-                              ctx->Pack.BufferObj);

-   }

-}

-

-

-

-/**

- * This is the software fallback for Driver.GetCompressedTexImage().

- * All error checking will have been done before this routine is called.

- */

-void

-_mesa_get_compressed_teximage(struct gl_context *ctx, GLenum target, GLint level,

-                              GLvoid *img,

-                              struct gl_texture_object *texObj,

-                              struct gl_texture_image *texImage)

-{

-   const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat,

-                                                     texImage->Width);

-   const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat,

-                                                            texImage->RowStride);

-   GLuint i;

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      /* pack texture image into a PBO */

-      GLubyte *buf = (GLubyte *)

-         ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,

-                               GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);

-      if (!buf) {

-         /* out of memory or other unexpected error */

-         _mesa_error(ctx, GL_OUT_OF_MEMORY,

-                     "glGetCompresssedTexImage(map PBO failed)");

-         return;

-      }

-      img = ADD_POINTERS(buf, img);

-   }

-

-   /* no pixelstore or pixel transfer, but respect stride */

-

-   if (row_stride == row_stride_stored) {

-      const GLuint size = _mesa_format_image_size(texImage->TexFormat,

-                                                  texImage->Width,

-                                                  texImage->Height,

-                                                  texImage->Depth);

-      memcpy(img, texImage->Data, size);

-   }

-   else {

-      GLuint bw, bh;

-      _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);

-      for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) {

-         memcpy((GLubyte *)img + i * row_stride,

-                (GLubyte *)texImage->Data + i * row_stride_stored,

-                row_stride);

-      }

-   }

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,

-                              ctx->Pack.BufferObj);

-   }

-}

-

-

-

-/**

- * Do error checking for a glGetTexImage() call.

- * \return GL_TRUE if any error, GL_FALSE if no errors.

- */

-static GLboolean

-getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,

-                        GLenum format, GLenum type, GLsizei clientMemSize,

-                        GLvoid *pixels )

-{

-   struct gl_texture_object *texObj;

-   struct gl_texture_image *texImage;

-   const GLint maxLevels = _mesa_max_texture_levels(ctx, target);

-   const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;

-   GLenum baseFormat;

-

-   if (maxLevels == 0) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);

-      return GL_TRUE;

-   }

-

-   if (level < 0 || level >= maxLevels) {

-      _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );

-      return GL_TRUE;

-   }

-

-   if (_mesa_sizeof_packed_type(type) <= 0) {

-      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );

-      return GL_TRUE;

-   }

-

-   if (_mesa_components_in_format(format) <= 0 ||

-       format == GL_STENCIL_INDEX) {

-      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );

-      return GL_TRUE;

-   }

-

-   if (!ctx->Extensions.EXT_paletted_texture && _mesa_is_index_format(format)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");

-      return GL_TRUE;

-   }

-

-   if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");

-      return GL_TRUE;

-   }

-

-   if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");

-      return GL_TRUE;

-   }

-

-   if (!ctx->Extensions.EXT_packed_depth_stencil

-       && _mesa_is_depthstencil_format(format)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");

-      return GL_TRUE;

-   }

-

-   if (!ctx->Extensions.ATI_envmap_bumpmap

-       && _mesa_is_dudv_format(format)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");

-      return GL_TRUE;

-   }

-

-   texObj = _mesa_get_current_tex_object(ctx, target);

-

-   if (!texObj || _mesa_is_proxy_texture(target)) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");

-      return GL_TRUE;

-   }

-

-   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

-   if (!texImage) {

-      /* out of memory */

-      return GL_TRUE;

-   }

-

-   baseFormat = _mesa_get_format_base_format(texImage->TexFormat);

-      

-   /* Make sure the requested image format is compatible with the

-    * texture's format.  Note that a color index texture can be converted

-    * to RGBA so that combo is allowed.

-    */

-   if (_mesa_is_color_format(format)

-       && !_mesa_is_color_format(baseFormat)

-       && !_mesa_is_index_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-   else if (_mesa_is_index_format(format)

-            && !_mesa_is_index_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-   else if (_mesa_is_depth_format(format)

-            && !_mesa_is_depth_format(baseFormat)

-            && !_mesa_is_depthstencil_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-   else if (_mesa_is_ycbcr_format(format)

-            && !_mesa_is_ycbcr_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-   else if (_mesa_is_depthstencil_format(format)

-            && !_mesa_is_depthstencil_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-   else if (_mesa_is_dudv_format(format)

-            && !_mesa_is_dudv_format(baseFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");

-      return GL_TRUE;

-   }

-

-   if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,

-                                  texImage->Height, texImage->Depth,

-                                  format, type, clientMemSize, pixels)) {

-      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetTexImage(out of bounds PBO access)");

-      } else {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetnTexImageARB(out of bounds access:"

-                     " bufSize (%d) is too small)", clientMemSize);

-      }

-      return GL_TRUE;

-   }

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      /* PBO should not be mapped */

-      if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetTexImage(PBO is mapped)");

-         return GL_TRUE;

-      }

-   }

-

-   return GL_FALSE;

-}

-

-

-

-/**

- * Get texture image.  Called by glGetTexImage.

- *

- * \param target texture target.

- * \param level image level.

- * \param format pixel data format for returned image.

- * \param type pixel data type for returned image.

- * \param bufSize size of the pixels data buffer.

- * \param pixels returned pixel data.

- */

-void GLAPIENTRY

-_mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,

-                       GLenum type, GLsizei bufSize, GLvoid *pixels )

-{

-   struct gl_texture_object *texObj;

-   struct gl_texture_image *texImage;

-   GET_CURRENT_CONTEXT(ctx);

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

-

-   if (getteximage_error_check(ctx, target, level, format, type,

-                               bufSize, pixels)) {

-      return;

-   }

-

-   if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {

-      /* not an error, do nothing */

-      return;

-   }

-

-   texObj = _mesa_get_current_tex_object(ctx, target);

-   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

-

-   if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {

-      _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"

-                  " dstFmt=0x%x, dstType=0x%x\n",

-                  texObj->Name,

-                  _mesa_get_format_name(texImage->TexFormat),

-                  texImage->Width, texImage->Height,

-                  format, type);

-   }

-

-   _mesa_lock_texture(ctx, texObj);

-   {

-      ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,

-                              texObj, texImage);

-   }

-   _mesa_unlock_texture(ctx, texObj);

-}

-

-

-void GLAPIENTRY

-_mesa_GetTexImage( GLenum target, GLint level, GLenum format,

-                   GLenum type, GLvoid *pixels )

-{

-   _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels);

-}

-

-

-/**

- * Do error checking for a glGetCompressedTexImage() call.

- * \return GL_TRUE if any error, GL_FALSE if no errors.

- */

-static GLboolean

-getcompressedteximage_error_check(struct gl_context *ctx, GLenum target,

-                                  GLint level, GLsizei clientMemSize, GLvoid *img)

-{

-   struct gl_texture_object *texObj;

-   struct gl_texture_image *texImage;

-   const GLint maxLevels = _mesa_max_texture_levels(ctx, target);

-   GLuint compressedSize;

-

-   if (maxLevels == 0) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",

-                  target);

-      return GL_TRUE;

-   }

-

-   if (level < 0 || level >= maxLevels) {

-      _mesa_error(ctx, GL_INVALID_VALUE,

-                  "glGetCompressedTexImageARB(bad level = %d)", level);

-      return GL_TRUE;

-   }

-

-   if (_mesa_is_proxy_texture(target)) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glGetCompressedTexImageARB(bad target = %s)",

-                  _mesa_lookup_enum_by_nr(target));

-      return GL_TRUE;

-   }

-

-   texObj = _mesa_get_current_tex_object(ctx, target);

-   if (!texObj) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");

-      return GL_TRUE;

-   }

-

-   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

-

-   if (!texImage) {

-      /* probably invalid mipmap level */

-      _mesa_error(ctx, GL_INVALID_VALUE,

-                  "glGetCompressedTexImageARB(level)");

-      return GL_TRUE;

-   }

-

-   if (!_mesa_is_format_compressed(texImage->TexFormat)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glGetCompressedTexImageARB(texture is not compressed)");

-      return GL_TRUE;

-   }

-

-   compressedSize = _mesa_format_image_size(texImage->TexFormat,

-                                            texImage->Width,

-                                            texImage->Height,

-                                            texImage->Depth);

-

-   if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) {

-      /* do bounds checking on writing to client memory */

-      if (clientMemSize < compressedSize) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetnCompressedTexImageARB(out of bounds access:"

-                     " bufSize (%d) is too small)", clientMemSize);

-      }

-   } else {

-      /* do bounds checking on PBO write */

-      if ((const GLubyte *) img + compressedSize >

-          (const GLubyte *) ctx->Pack.BufferObj->Size) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetCompressedTexImage(out of bounds PBO access)");

-         return GL_TRUE;

-      }

-

-      /* make sure PBO is not mapped */

-      if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetCompressedTexImage(PBO is mapped)");

-         return GL_TRUE;

-      }

-   }

-

-   return GL_FALSE;

-}

-

-

-void GLAPIENTRY

-_mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize,

-                                GLvoid *img)

-{

-   struct gl_texture_object *texObj;

-   struct gl_texture_image *texImage;

-   GET_CURRENT_CONTEXT(ctx);

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

-

-   if (getcompressedteximage_error_check(ctx, target, level, bufSize, img)) {

-      return;

-   }

-

-   if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) {

-      /* not an error, do nothing */

-      return;

-   }

-

-   texObj = _mesa_get_current_tex_object(ctx, target);

-   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

-

-   if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {

-      _mesa_debug(ctx,

-                  "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",

-                  texObj->Name,

-                  _mesa_get_format_name(texImage->TexFormat),

-                  texImage->Width, texImage->Height);

-   }

-

-   _mesa_lock_texture(ctx, texObj);

-   {

-      ctx->Driver.GetCompressedTexImage(ctx, target, level, img,

-                                        texObj, texImage);

-   }

-   _mesa_unlock_texture(ctx, texObj);

-}

-

-void GLAPIENTRY

-_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)

-{

-   _mesa_GetnCompressedTexImageARB(target, level, INT_MAX, img);

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.7
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2009 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * Code for glGetTexImage() and glGetCompressedTexImage().
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "enums.h"
+#include "context.h"
+#include "formats.h"
+#include "image.h"
+#include "mfeatures.h"
+#include "mtypes.h"
+#include "pack.h"
+#include "pbo.h"
+#include "texgetimage.h"
+#include "texfetch.h"
+#include "teximage.h"
+
+
+
+/**
+ * Can the given type represent negative values?
+ */
+static INLINE GLboolean
+type_with_negative_values(GLenum type)
+{
+   switch (type) {
+   case GL_BYTE:
+   case GL_SHORT:
+   case GL_INT:
+   case GL_FLOAT:
+   case GL_HALF_FLOAT_ARB:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * glGetTexImage for color index pixels.
+ */
+static void
+get_tex_color_index(struct gl_context *ctx, GLuint dimensions,
+                    GLenum format, GLenum type, GLvoid *pixels,
+                    const struct gl_texture_image *texImage)
+{
+   const GLint width = texImage->Width;
+   const GLint height = texImage->Height;
+   const GLint depth = texImage->Depth;
+   const GLint rowstride = texImage->RowStride;
+   const GLuint indexBits =
+      _mesa_get_format_bits(texImage->TexFormat, GL_TEXTURE_INDEX_SIZE_EXT);
+   const GLbitfield transferOps = 0x0;
+   GLint img, row, col;
+
+   for (img = 0; img < depth; img++) {
+      for (row = 0; row < height; row++) {
+         GLuint indexRow[MAX_WIDTH] = { 0 };
+         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+                                          width, height, format, type,
+                                          img, row, 0);
+         assert(dest);
+
+         if (indexBits == 8) {
+            const GLubyte *src = (const GLubyte *) texImage->Data;
+            src += rowstride * (img * height + row);
+            for (col = 0; col < width; col++) {
+               indexRow[col] = src[col];
+            }
+         }
+         else if (indexBits == 16) {
+            const GLushort *src = (const GLushort *) texImage->Data;
+            src += rowstride * (img * height + row);
+            for (col = 0; col < width; col++) {
+               indexRow[col] = src[col];
+            }
+         }
+         else {
+            _mesa_problem(ctx, "Color index problem in _mesa_GetTexImage");
+         }
+         _mesa_pack_index_span(ctx, width, type, dest,
+                               indexRow, &ctx->Pack, transferOps);
+      }
+   }
+}
+
+
+/**
+ * glGetTexImage for depth/Z pixels.
+ */
+static void
+get_tex_depth(struct gl_context *ctx, GLuint dimensions,
+              GLenum format, GLenum type, GLvoid *pixels,
+              const struct gl_texture_image *texImage)
+{
+   const GLint width = texImage->Width;
+   const GLint height = texImage->Height;
+   const GLint depth = texImage->Depth;
+   GLint img, row, col;
+   GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat));
+
+   if (!depthRow) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+      return;
+   }
+
+   for (img = 0; img < depth; img++) {
+      for (row = 0; row < height; row++) {
+         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+                                          width, height, format, type,
+                                          img, row, 0);
+         assert(dest);
+
+         for (col = 0; col < width; col++) {
+            texImage->FetchTexelf(texImage, col, row, img, depthRow + col);
+         }
+         _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack);
+      }
+   }
+
+   free(depthRow);
+}
+
+
+/**
+ * glGetTexImage for depth/stencil pixels.
+ */
+static void
+get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions,
+                      GLenum format, GLenum type, GLvoid *pixels,
+                      const struct gl_texture_image *texImage)
+{
+   const GLint width = texImage->Width;
+   const GLint height = texImage->Height;
+   const GLint depth = texImage->Depth;
+   const GLint rowstride = texImage->RowStride;
+   const GLuint *src = (const GLuint *) texImage->Data;
+   GLint img, row;
+
+   for (img = 0; img < depth; img++) {
+      for (row = 0; row < height; row++) {
+         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+                                          width, height, format, type,
+                                          img, row, 0);
+         memcpy(dest, src, width * sizeof(GLuint));
+         if (ctx->Pack.SwapBytes) {
+            _mesa_swap4((GLuint *) dest, width);
+         }
+
+         src += rowstride;
+      }
+   }
+}
+
+
+/**
+ * glGetTexImage for YCbCr pixels.
+ */
+static void
+get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions,
+              GLenum format, GLenum type, GLvoid *pixels,
+              const struct gl_texture_image *texImage)
+{
+   const GLint width = texImage->Width;
+   const GLint height = texImage->Height;
+   const GLint depth = texImage->Depth;
+   const GLint rowstride = texImage->RowStride;
+   const GLushort *src = (const GLushort *) texImage->Data;
+   GLint img, row;
+
+   for (img = 0; img < depth; img++) {
+      for (row = 0; row < height; row++) {
+         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+                                          width, height, format, type,
+                                          img, row, 0);
+         memcpy(dest, src, width * sizeof(GLushort));
+
+         /* check for byte swapping */
+         if ((texImage->TexFormat == MESA_FORMAT_YCBCR
+              && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
+             (texImage->TexFormat == MESA_FORMAT_YCBCR_REV
+              && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
+            if (!ctx->Pack.SwapBytes)
+               _mesa_swap2((GLushort *) dest, width);
+         }
+         else if (ctx->Pack.SwapBytes) {
+            _mesa_swap2((GLushort *) dest, width);
+         }
+
+         src += rowstride;
+      }
+   }
+}
+
+
+/**
+ * glGetTexImage for (s)RGBA, Luminance, etc. pixels.
+ * This is the slow way since we use texture sampling.
+ */
+static void
+get_tex_rgba(struct gl_context *ctx, GLuint dimensions,
+             GLenum format, GLenum type, GLvoid *pixels,
+             struct gl_texture_image *texImage)
+{
+   const GLint width = texImage->Width;
+   const GLint height = texImage->Height;
+   const GLint depth = texImage->Depth;
+   /* Normally, no pixel transfer ops are performed during glGetTexImage.
+    * The only possible exception is component clamping to [0,1].
+    */
+   GLbitfield transferOps = 0x0;
+   GLint img, row;
+   GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));
+   const GLboolean is_sampler_srgb_decode =
+       _mesa_get_format_color_encoding(texImage->TexFormat) == GL_SRGB &&
+       texImage->TexObject->Sampler.sRGBDecode == GL_DECODE_EXT;
+
+   if (!rgba) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+      return;
+   }
+
+   /* glGetTexImage always returns sRGB data for sRGB textures. Make sure the
+    * fetch functions return sRGB data without linearizing it.
+    */
+   if (is_sampler_srgb_decode) {
+      texImage->TexObject->Sampler.sRGBDecode = GL_SKIP_DECODE_EXT;
+      _mesa_set_fetch_functions(texImage, dimensions);
+   }
+
+   for (img = 0; img < depth; img++) {
+      for (row = 0; row < height; row++) {
+         void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+                                          width, height, format, type,
+                                          img, row, 0);
+         GLint col;
+         GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat);
+
+         /* clamp does not apply to GetTexImage (final conversion)?
+          * Looks like we need clamp though when going from format
+          * containing negative values to unsigned format.
+          */
+         if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) {
+            transferOps |= IMAGE_CLAMP_BIT;
+         }
+         else if (!type_with_negative_values(type) &&
+                  (dataType == GL_FLOAT ||
+                   dataType == GL_SIGNED_NORMALIZED)) {
+            transferOps |= IMAGE_CLAMP_BIT;
+         }
+
+         for (col = 0; col < width; col++) {
+            texImage->FetchTexelf(texImage, col, row, img, rgba[col]);
+            if (texImage->_BaseFormat == GL_ALPHA) {
+               rgba[col][RCOMP] = 0.0F;
+               rgba[col][GCOMP] = 0.0F;
+               rgba[col][BCOMP] = 0.0F;
+            }
+            else if (texImage->_BaseFormat == GL_LUMINANCE) {
+               rgba[col][GCOMP] = 0.0F;
+               rgba[col][BCOMP] = 0.0F;
+               rgba[col][ACOMP] = 1.0F;
+            }
+            else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
+               rgba[col][GCOMP] = 0.0F;
+               rgba[col][BCOMP] = 0.0F;
+            }
+            else if (texImage->_BaseFormat == GL_INTENSITY) {
+               rgba[col][GCOMP] = 0.0F;
+               rgba[col][BCOMP] = 0.0F;
+               rgba[col][ACOMP] = 1.0F;
+            }
+         }
+         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
+                                    format, type, dest,
+                                    &ctx->Pack, transferOps);
+      }
+   }
+
+   if (is_sampler_srgb_decode) {
+      texImage->TexObject->Sampler.sRGBDecode = GL_DECODE_EXT;
+      _mesa_set_fetch_functions(texImage, dimensions);
+   }
+
+   free(rgba);
+}
+
+
+/**
+ * Try to do glGetTexImage() with simple memcpy().
+ * \return GL_TRUE if done, GL_FALSE otherwise
+ */
+static GLboolean
+get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels,
+               const struct gl_texture_object *texObj,
+               const struct gl_texture_image *texImage)
+{
+   GLboolean memCopy = GL_FALSE;
+
+   /* Texture image should have been mapped already */
+   assert(texImage->Data);
+
+   /*
+    * Check if the src/dst formats are compatible.
+    * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
+    * so we don't have to worry about those.
+    * XXX more format combinations could be supported here.
+    */
+   if ((texObj->Target == GL_TEXTURE_1D ||
+        texObj->Target == GL_TEXTURE_2D ||
+        texObj->Target == GL_TEXTURE_RECTANGLE ||
+        (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
+         texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) {
+      if ((texImage->TexFormat == MESA_FORMAT_ARGB8888 ||
+             texImage->TexFormat == MESA_FORMAT_SARGB8) &&
+          format == GL_BGRA &&
+          (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) &&
+          !ctx->Pack.SwapBytes &&
+          _mesa_little_endian()) {
+         memCopy = GL_TRUE;
+      }
+      else if ((texImage->TexFormat == MESA_FORMAT_AL88 ||
+                  texImage->TexFormat == MESA_FORMAT_SLA8) &&
+               format == GL_LUMINANCE_ALPHA &&
+               type == GL_UNSIGNED_BYTE &&
+               !ctx->Pack.SwapBytes &&
+               _mesa_little_endian()) {
+         memCopy = GL_TRUE;
+      }
+      else if ((texImage->TexFormat == MESA_FORMAT_L8 ||
+                  texImage->TexFormat == MESA_FORMAT_SL8) &&
+               format == GL_LUMINANCE &&
+               type == GL_UNSIGNED_BYTE) {
+         memCopy = GL_TRUE;
+      }
+      else if (texImage->TexFormat == MESA_FORMAT_L16 &&
+               format == GL_LUMINANCE &&
+               type == GL_UNSIGNED_SHORT) {
+         memCopy = GL_TRUE;
+      }
+      else if (texImage->TexFormat == MESA_FORMAT_A8 &&
+               format == GL_ALPHA &&
+               type == GL_UNSIGNED_BYTE) {
+         memCopy = GL_TRUE;
+      }
+      else if (texImage->TexFormat == MESA_FORMAT_A16 &&
+               format == GL_ALPHA &&
+               type == GL_UNSIGNED_SHORT) {
+         memCopy = GL_TRUE;
+      }
+   }
+
+   if (memCopy) {
+      const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);
+      const GLuint bytesPerRow = texImage->Width * bpp;
+      GLubyte *dst =
+         _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width,
+                               texImage->Height, format, type, 0, 0);
+      const GLint dstRowStride =
+         _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type);
+      const GLubyte *src = texImage->Data;
+      const GLint srcRowStride = texImage->RowStride * bpp;
+      GLuint row;
+
+      if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {
+         memcpy(dst, src, bytesPerRow * texImage->Height);
+      }
+      else {
+         for (row = 0; row < texImage->Height; row++) {
+            memcpy(dst, src, bytesPerRow);
+            dst += dstRowStride;
+            src += srcRowStride;
+         }
+      }
+   }
+
+   return memCopy;
+}
+
+
+/**
+ * This is the software fallback for Driver.GetTexImage().
+ * All error checking will have been done before this routine is called.
+ * The texture image must be mapped.
+ */
+void
+_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level,
+                   GLenum format, GLenum type, GLvoid *pixels,
+                   struct gl_texture_object *texObj,
+                   struct gl_texture_image *texImage)
+{
+   GLuint dimensions;
+
+   /* If we get here, the texture image should be mapped */
+   assert(texImage->Data);
+
+   switch (target) {
+   case GL_TEXTURE_1D:
+      dimensions = 1;
+      break;
+   case GL_TEXTURE_3D:
+      dimensions = 3;
+      break;
+   default:
+      dimensions = 2;
+   }
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      /* Packing texture image into a PBO.
+       * Map the (potentially) VRAM-based buffer into our process space so
+       * we can write into it with the code below.
+       * A hardware driver might use a sophisticated blit to move the
+       * texture data to the PBO if the PBO is in VRAM along with the texture.
+       */
+      GLubyte *buf = (GLubyte *)
+         ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                               GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
+      if (!buf) {
+         /* out of memory or other unexpected error */
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)");
+         return;
+      }
+      /* <pixels> was an offset into the PBO.
+       * Now make it a real, client-side pointer inside the mapped region.
+       */
+      pixels = ADD_POINTERS(buf, pixels);
+   }
+
+   if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) {
+      /* all done */
+   }
+   else if (format == GL_COLOR_INDEX) {
+      get_tex_color_index(ctx, dimensions, format, type, pixels, texImage);
+   }
+   else if (format == GL_DEPTH_COMPONENT) {
+      get_tex_depth(ctx, dimensions, format, type, pixels, texImage);
+   }
+   else if (format == GL_DEPTH_STENCIL_EXT) {
+      get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage);
+   }
+   else if (format == GL_YCBCR_MESA) {
+      get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage);
+   }
+   else {
+      get_tex_rgba(ctx, dimensions, format, type, pixels, texImage);
+   }
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+
+/**
+ * This is the software fallback for Driver.GetCompressedTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_compressed_teximage(struct gl_context *ctx, GLenum target, GLint level,
+                              GLvoid *img,
+                              struct gl_texture_object *texObj,
+                              struct gl_texture_image *texImage)
+{
+   const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat,
+                                                     texImage->Width);
+   const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat,
+                                                            texImage->RowStride);
+   GLuint i;
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      /* pack texture image into a PBO */
+      GLubyte *buf = (GLubyte *)
+         ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                               GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
+      if (!buf) {
+         /* out of memory or other unexpected error */
+         _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                     "glGetCompresssedTexImage(map PBO failed)");
+         return;
+      }
+      img = ADD_POINTERS(buf, img);
+   }
+
+   /* no pixelstore or pixel transfer, but respect stride */
+
+   if (row_stride == row_stride_stored) {
+      const GLuint size = _mesa_format_image_size(texImage->TexFormat,
+                                                  texImage->Width,
+                                                  texImage->Height,
+                                                  texImage->Depth);
+      memcpy(img, texImage->Data, size);
+   }
+   else {
+      GLuint bw, bh;
+      _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
+      for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) {
+         memcpy((GLubyte *)img + i * row_stride,
+                (GLubyte *)texImage->Data + i * row_stride_stored,
+                row_stride);
+      }
+   }
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+
+/**
+ * Do error checking for a glGetTexImage() call.
+ * \return GL_TRUE if any error, GL_FALSE if no errors.
+ */
+static GLboolean
+getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
+                        GLenum format, GLenum type, GLsizei clientMemSize,
+                        GLvoid *pixels )
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
+   const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
+   GLenum baseFormat;
+
+   if (maxLevels == 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
+      return GL_TRUE;
+   }
+
+   if (level < 0 || level >= maxLevels) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
+      return GL_TRUE;
+   }
+
+   if (_mesa_sizeof_packed_type(type) <= 0) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
+      return GL_TRUE;
+   }
+
+   if (_mesa_components_in_format(format) <= 0 ||
+       format == GL_STENCIL_INDEX) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
+      return GL_TRUE;
+   }
+
+   if (!ctx->Extensions.EXT_paletted_texture && _mesa_is_index_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return GL_TRUE;
+   }
+
+   if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return GL_TRUE;
+   }
+
+   if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return GL_TRUE;
+   }
+
+   if (!ctx->Extensions.EXT_packed_depth_stencil
+       && _mesa_is_depthstencil_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return GL_TRUE;
+   }
+
+   if (!ctx->Extensions.ATI_envmap_bumpmap
+       && _mesa_is_dudv_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return GL_TRUE;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+
+   if (!texObj || _mesa_is_proxy_texture(target)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
+      return GL_TRUE;
+   }
+
+   texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+   if (!texImage) {
+      /* out of memory */
+      return GL_TRUE;
+   }
+
+   baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
+      
+   /* Make sure the requested image format is compatible with the
+    * texture's format.  Note that a color index texture can be converted
+    * to RGBA so that combo is allowed.
+    */
+   if (_mesa_is_color_format(format)
+       && !_mesa_is_color_format(baseFormat)
+       && !_mesa_is_index_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+   else if (_mesa_is_index_format(format)
+            && !_mesa_is_index_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+   else if (_mesa_is_depth_format(format)
+            && !_mesa_is_depth_format(baseFormat)
+            && !_mesa_is_depthstencil_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+   else if (_mesa_is_ycbcr_format(format)
+            && !_mesa_is_ycbcr_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+   else if (_mesa_is_depthstencil_format(format)
+            && !_mesa_is_depthstencil_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+   else if (_mesa_is_dudv_format(format)
+            && !_mesa_is_dudv_format(baseFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
+
+   if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
+                                  texImage->Height, texImage->Depth,
+                                  format, type, clientMemSize, pixels)) {
+      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetTexImage(out of bounds PBO access)");
+      } else {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetnTexImageARB(out of bounds access:"
+                     " bufSize (%d) is too small)", clientMemSize);
+      }
+      return GL_TRUE;
+   }
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      /* PBO should not be mapped */
+      if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetTexImage(PBO is mapped)");
+         return GL_TRUE;
+      }
+   }
+
+   return GL_FALSE;
+}
+
+
+
+/**
+ * Get texture image.  Called by glGetTexImage.
+ *
+ * \param target texture target.
+ * \param level image level.
+ * \param format pixel data format for returned image.
+ * \param type pixel data type for returned image.
+ * \param bufSize size of the pixels data buffer.
+ * \param pixels returned pixel data.
+ */
+void GLAPIENTRY
+_mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,
+                       GLenum type, GLsizei bufSize, GLvoid *pixels )
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (getteximage_error_check(ctx, target, level, format, type,
+                               bufSize, pixels)) {
+      return;
+   }
+
+   if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
+      /* not an error, do nothing */
+      return;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+   texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+   if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
+      _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
+                  " dstFmt=0x%x, dstType=0x%x\n",
+                  texObj->Name,
+                  _mesa_get_format_name(texImage->TexFormat),
+                  texImage->Width, texImage->Height,
+                  format, type);
+   }
+
+   _mesa_lock_texture(ctx, texObj);
+   {
+      ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,
+                              texObj, texImage);
+   }
+   _mesa_unlock_texture(ctx, texObj);
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
+                   GLenum type, GLvoid *pixels )
+{
+   _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels);
+}
+
+
+/**
+ * Do error checking for a glGetCompressedTexImage() call.
+ * \return GL_TRUE if any error, GL_FALSE if no errors.
+ */
+static GLboolean
+getcompressedteximage_error_check(struct gl_context *ctx, GLenum target,
+                                  GLint level, GLsizei clientMemSize, GLvoid *img)
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
+   GLuint compressedSize;
+
+   if (maxLevels == 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",
+                  target);
+      return GL_TRUE;
+   }
+
+   if (level < 0 || level >= maxLevels) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glGetCompressedTexImageARB(bad level = %d)", level);
+      return GL_TRUE;
+   }
+
+   if (_mesa_is_proxy_texture(target)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetCompressedTexImageARB(bad target = %s)",
+                  _mesa_lookup_enum_by_nr(target));
+      return GL_TRUE;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+   if (!texObj) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
+      return GL_TRUE;
+   }
+
+   texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+   if (!texImage) {
+      /* probably invalid mipmap level */
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glGetCompressedTexImageARB(level)");
+      return GL_TRUE;
+   }
+
+   if (!_mesa_is_format_compressed(texImage->TexFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetCompressedTexImageARB(texture is not compressed)");
+      return GL_TRUE;
+   }
+
+   compressedSize = _mesa_format_image_size(texImage->TexFormat,
+                                            texImage->Width,
+                                            texImage->Height,
+                                            texImage->Depth);
+
+   if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+      /* do bounds checking on writing to client memory */
+      if (clientMemSize < compressedSize) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetnCompressedTexImageARB(out of bounds access:"
+                     " bufSize (%d) is too small)", clientMemSize);
+      }
+   } else {
+      /* do bounds checking on PBO write */
+      if ((const GLubyte *) img + compressedSize >
+          (const GLubyte *) ctx->Pack.BufferObj->Size) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetCompressedTexImage(out of bounds PBO access)");
+         return GL_TRUE;
+      }
+
+      /* make sure PBO is not mapped */
+      if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetCompressedTexImage(PBO is mapped)");
+         return GL_TRUE;
+      }
+   }
+
+   return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize,
+                                GLvoid *img)
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (getcompressedteximage_error_check(ctx, target, level, bufSize, img)) {
+      return;
+   }
+
+   if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) {
+      /* not an error, do nothing */
+      return;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+   texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+   if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
+      _mesa_debug(ctx,
+                  "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
+                  texObj->Name,
+                  _mesa_get_format_name(texImage->TexFormat),
+                  texImage->Width, texImage->Height);
+   }
+
+   _mesa_lock_texture(ctx, texObj);
+   {
+      ctx->Driver.GetCompressedTexImage(ctx, target, level, img,
+                                        texObj, texImage);
+   }
+   _mesa_unlock_texture(ctx, texObj);
+}
+
+void GLAPIENTRY
+_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
+{
+   _mesa_GetnCompressedTexImageARB(target, level, INT_MAX, img);
+}
diff --git a/mesalib/src/mesa/state_tracker/st_format.c b/mesalib/src/mesa/state_tracker/st_format.c
index 8568c68e1..de30b4fc6 100644
--- a/mesalib/src/mesa/state_tracker/st_format.c
+++ b/mesalib/src/mesa/state_tracker/st_format.c
@@ -1,1692 +1,1338 @@
-/**************************************************************************

- * 

- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

- * Copyright (c) 2008-2010 VMware, Inc.

- * All Rights Reserved.

- * 

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the

- * "Software"), to deal in the Software without restriction, including

- * without limitation the rights to use, copy, modify, merge, publish,

- * distribute, sub license, 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 NON-INFRINGEMENT.

- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.

- * 

- **************************************************************************/

-

-

-/**

- * Mesa / Gallium format conversion and format selection code.

- * \author Brian Paul

- */

-

-#include "main/imports.h"

-#include "main/context.h"

-#include "main/texstore.h"

-#include "main/image.h"

-#include "main/macros.h"

-#include "main/mfeatures.h"

-

-#include "pipe/p_context.h"

-#include "pipe/p_defines.h"

-#include "pipe/p_screen.h"

-#include "util/u_format.h"

-#include "st_context.h"

-#include "st_format.h"

-

-

-static GLuint

-format_max_bits(enum pipe_format format)

-{

-   GLuint size = util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 0);

-

-   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 1));

-   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 2));

-   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 3));

-   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0));

-   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1));

-   return size;

-}

-

-

-/**

- * Return basic GL datatype for the given gallium format.

- */

-GLenum

-st_format_datatype(enum pipe_format format)

-{

-   const struct util_format_description *desc;

-

-   desc = util_format_description(format);

-   assert(desc);

-

-   if (desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) {

-      if (format == PIPE_FORMAT_B5G5R5A1_UNORM ||

-          format == PIPE_FORMAT_B5G6R5_UNORM) {

-         return GL_UNSIGNED_SHORT;

-      }

-      else if (format == PIPE_FORMAT_Z24_UNORM_S8_USCALED ||

-               format == PIPE_FORMAT_S8_USCALED_Z24_UNORM ||

-               format == PIPE_FORMAT_Z24X8_UNORM ||

-               format == PIPE_FORMAT_X8Z24_UNORM) {

-         return GL_UNSIGNED_INT_24_8;

-      }

-      else {

-         const GLuint size = format_max_bits(format);

-         if (size == 8) {

-            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)

-               return GL_UNSIGNED_BYTE;

-            else

-               return GL_BYTE;

-         }

-         else if (size == 16) {

-            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)

-               return GL_UNSIGNED_SHORT;

-            else

-               return GL_SHORT;

-         }

-         else {

-            assert( size <= 32 );

-            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)

-               return GL_UNSIGNED_INT;

-            else

-               return GL_INT;

-         }

-      }

-   }

-   else if (format == PIPE_FORMAT_UYVY) {

-      return GL_UNSIGNED_SHORT;

-   }

-   else if (format == PIPE_FORMAT_YUYV) {

-      return GL_UNSIGNED_SHORT;

-   }

-   else {

-      /* probably a compressed format, unsupported anyway */

-      return GL_NONE;

-   }

-}

-

-

-/**

- * Translate Mesa format to Gallium format.

- */

-enum pipe_format

-st_mesa_format_to_pipe_format(gl_format mesaFormat)

-{

-   switch (mesaFormat) {

-   case MESA_FORMAT_RGBA8888:

-      return PIPE_FORMAT_A8B8G8R8_UNORM;

-   case MESA_FORMAT_RGBA8888_REV:

-      return PIPE_FORMAT_R8G8B8A8_UNORM;

-   case MESA_FORMAT_ARGB8888:

-      return PIPE_FORMAT_B8G8R8A8_UNORM;

-   case MESA_FORMAT_ARGB8888_REV:

-      return PIPE_FORMAT_A8R8G8B8_UNORM;

-   case MESA_FORMAT_XRGB8888:

-      return PIPE_FORMAT_B8G8R8X8_UNORM;

-   case MESA_FORMAT_XRGB8888_REV:

-      return PIPE_FORMAT_X8R8G8B8_UNORM;

-   case MESA_FORMAT_ARGB1555:

-      return PIPE_FORMAT_B5G5R5A1_UNORM;

-   case MESA_FORMAT_ARGB4444:

-      return PIPE_FORMAT_B4G4R4A4_UNORM;

-   case MESA_FORMAT_RGB565:

-      return PIPE_FORMAT_B5G6R5_UNORM;

-   case MESA_FORMAT_RGB332:

-      return PIPE_FORMAT_B2G3R3_UNORM;

-   case MESA_FORMAT_ARGB2101010:

-      return PIPE_FORMAT_B10G10R10A2_UNORM;

-   case MESA_FORMAT_AL44:

-      return PIPE_FORMAT_L4A4_UNORM;

-   case MESA_FORMAT_AL88:

-      return PIPE_FORMAT_L8A8_UNORM;

-   case MESA_FORMAT_AL1616:

-      return PIPE_FORMAT_L16A16_UNORM;

-   case MESA_FORMAT_A8:

-      return PIPE_FORMAT_A8_UNORM;

-   case MESA_FORMAT_A16:

-      return PIPE_FORMAT_A16_UNORM;

-   case MESA_FORMAT_L8:

-      return PIPE_FORMAT_L8_UNORM;

-   case MESA_FORMAT_L16:

-      return PIPE_FORMAT_L16_UNORM;

-   case MESA_FORMAT_I8:

-      return PIPE_FORMAT_I8_UNORM;

-   case MESA_FORMAT_I16:

-      return PIPE_FORMAT_I16_UNORM;

-   case MESA_FORMAT_Z16:

-      return PIPE_FORMAT_Z16_UNORM;

-   case MESA_FORMAT_Z32:

-      return PIPE_FORMAT_Z32_UNORM;

-   case MESA_FORMAT_Z24_S8:

-      return PIPE_FORMAT_S8_USCALED_Z24_UNORM;

-   case MESA_FORMAT_S8_Z24:

-      return PIPE_FORMAT_Z24_UNORM_S8_USCALED;

-   case MESA_FORMAT_Z24_X8:

-      return PIPE_FORMAT_X8Z24_UNORM;

-   case MESA_FORMAT_X8_Z24:

-      return PIPE_FORMAT_Z24X8_UNORM;

-   case MESA_FORMAT_S8:

-      return PIPE_FORMAT_S8_USCALED;

-   case MESA_FORMAT_YCBCR:

-      return PIPE_FORMAT_UYVY;

-#if FEATURE_texture_s3tc

-   case MESA_FORMAT_RGB_DXT1:

-      return PIPE_FORMAT_DXT1_RGB;

-   case MESA_FORMAT_RGBA_DXT1:

-      return PIPE_FORMAT_DXT1_RGBA;

-   case MESA_FORMAT_RGBA_DXT3:

-      return PIPE_FORMAT_DXT3_RGBA;

-   case MESA_FORMAT_RGBA_DXT5:

-      return PIPE_FORMAT_DXT5_RGBA;

-#if FEATURE_EXT_texture_sRGB

-   case MESA_FORMAT_SRGB_DXT1:

-      return PIPE_FORMAT_DXT1_SRGB;

-   case MESA_FORMAT_SRGBA_DXT1:

-      return PIPE_FORMAT_DXT1_SRGBA;

-   case MESA_FORMAT_SRGBA_DXT3:

-      return PIPE_FORMAT_DXT3_SRGBA;

-   case MESA_FORMAT_SRGBA_DXT5:

-      return PIPE_FORMAT_DXT5_SRGBA;

-#endif

-#endif

-#if FEATURE_EXT_texture_sRGB

-   case MESA_FORMAT_SLA8:

-      return PIPE_FORMAT_L8A8_SRGB;

-   case MESA_FORMAT_SL8:

-      return PIPE_FORMAT_L8_SRGB;

-   case MESA_FORMAT_SRGB8:

-      return PIPE_FORMAT_R8G8B8_SRGB;

-   case MESA_FORMAT_SRGBA8:

-      return PIPE_FORMAT_A8B8G8R8_SRGB;

-   case MESA_FORMAT_SARGB8:

-      return PIPE_FORMAT_B8G8R8A8_SRGB;

-#endif

-   case MESA_FORMAT_RGBA_FLOAT32:

-      return PIPE_FORMAT_R32G32B32A32_FLOAT;

-   case MESA_FORMAT_RGBA_FLOAT16:

-      return PIPE_FORMAT_R16G16B16A16_FLOAT;

-   case MESA_FORMAT_RGB_FLOAT32:

-      return PIPE_FORMAT_R32G32B32_FLOAT;

-   case MESA_FORMAT_RGB_FLOAT16:

-      return PIPE_FORMAT_R16G16B16_FLOAT;

-   case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:

-      return PIPE_FORMAT_L32A32_FLOAT;

-   case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:

-      return PIPE_FORMAT_L16A16_FLOAT;

-   case MESA_FORMAT_LUMINANCE_FLOAT32:

-      return PIPE_FORMAT_L32_FLOAT;

-   case MESA_FORMAT_LUMINANCE_FLOAT16:

-      return PIPE_FORMAT_L16_FLOAT;

-   case MESA_FORMAT_ALPHA_FLOAT32:

-      return PIPE_FORMAT_A32_FLOAT;

-   case MESA_FORMAT_ALPHA_FLOAT16:

-      return PIPE_FORMAT_A16_FLOAT;

-   case MESA_FORMAT_INTENSITY_FLOAT32:

-      return PIPE_FORMAT_I32_FLOAT;

-   case MESA_FORMAT_INTENSITY_FLOAT16:

-      return PIPE_FORMAT_I16_FLOAT;

-   case MESA_FORMAT_R_FLOAT32:

-      return PIPE_FORMAT_R32_FLOAT;

-   case MESA_FORMAT_R_FLOAT16:

-      return PIPE_FORMAT_R16_FLOAT;

-   case MESA_FORMAT_RG_FLOAT32:

-      return PIPE_FORMAT_R32G32_FLOAT;

-   case MESA_FORMAT_RG_FLOAT16:

-      return PIPE_FORMAT_R16G16_FLOAT;

-

-   case MESA_FORMAT_R8:

-      return PIPE_FORMAT_R8_UNORM;

-   case MESA_FORMAT_R16:

-      return PIPE_FORMAT_R16_UNORM;

-   case MESA_FORMAT_RG88:

-      return PIPE_FORMAT_R8G8_UNORM;

-   case MESA_FORMAT_RG1616:

-      return PIPE_FORMAT_R16G16_UNORM;

-   case MESA_FORMAT_RGBA_16:

-      return PIPE_FORMAT_R16G16B16A16_UNORM;

-

-   /* signed int formats */

-   case MESA_FORMAT_RGBA_INT8:

-      return PIPE_FORMAT_R8G8B8A8_SSCALED;

-   case MESA_FORMAT_RGBA_INT16:

-      return PIPE_FORMAT_R16G16B16A16_SSCALED;

-   case MESA_FORMAT_RGBA_INT32:

-      return PIPE_FORMAT_R32G32B32A32_SSCALED;

-

-   /* unsigned int formats */

-   case MESA_FORMAT_RGBA_UINT8:

-      return PIPE_FORMAT_R8G8B8A8_USCALED;

-   case MESA_FORMAT_RGBA_UINT16:

-      return PIPE_FORMAT_R16G16B16A16_USCALED;

-   case MESA_FORMAT_RGBA_UINT32:

-      return PIPE_FORMAT_R32G32B32A32_USCALED;

-

-   case MESA_FORMAT_RED_RGTC1:

-      return PIPE_FORMAT_RGTC1_UNORM;

-   case MESA_FORMAT_SIGNED_RED_RGTC1:

-      return PIPE_FORMAT_RGTC1_SNORM;

-   case MESA_FORMAT_RG_RGTC2:

-      return PIPE_FORMAT_RGTC2_UNORM;

-   case MESA_FORMAT_SIGNED_RG_RGTC2:

-      return PIPE_FORMAT_RGTC2_SNORM;

-

-   case MESA_FORMAT_L_LATC1:

-      return PIPE_FORMAT_LATC1_UNORM;

-   case MESA_FORMAT_SIGNED_L_LATC1:

-      return PIPE_FORMAT_LATC1_SNORM;

-   case MESA_FORMAT_LA_LATC2:

-      return PIPE_FORMAT_LATC2_UNORM;

-   case MESA_FORMAT_SIGNED_LA_LATC2:

-      return PIPE_FORMAT_LATC2_SNORM;

-

-   /* signed normalized formats */

-   case MESA_FORMAT_SIGNED_R8:

-      return PIPE_FORMAT_R8_SNORM;

-   case MESA_FORMAT_SIGNED_RG88_REV:

-      return PIPE_FORMAT_R8G8_SNORM;

-   case MESA_FORMAT_SIGNED_RGBA8888_REV:

-      return PIPE_FORMAT_R8G8B8A8_SNORM;

-

-   case MESA_FORMAT_SIGNED_A8:

-      return PIPE_FORMAT_A8_SNORM;

-   case MESA_FORMAT_SIGNED_L8:

-      return PIPE_FORMAT_L8_SNORM;

-   case MESA_FORMAT_SIGNED_AL88:

-      return PIPE_FORMAT_L8A8_SNORM;

-   case MESA_FORMAT_SIGNED_I8:

-      return PIPE_FORMAT_I8_SNORM;

-

-   case MESA_FORMAT_SIGNED_R16:

-      return PIPE_FORMAT_R16_SNORM;

-   case MESA_FORMAT_SIGNED_GR1616:

-      return PIPE_FORMAT_R16G16_SNORM;

-   case MESA_FORMAT_SIGNED_RGBA_16:

-      return PIPE_FORMAT_R16G16B16A16_SNORM;

-

-   case MESA_FORMAT_SIGNED_A16:

-      return PIPE_FORMAT_A16_SNORM;

-   case MESA_FORMAT_SIGNED_L16:

-      return PIPE_FORMAT_L16_SNORM;

-   case MESA_FORMAT_SIGNED_AL1616:

-      return PIPE_FORMAT_L16A16_SNORM;

-   case MESA_FORMAT_SIGNED_I16:

-      return PIPE_FORMAT_I16_SNORM;

-

-   case MESA_FORMAT_RGB9_E5_FLOAT:

-      return PIPE_FORMAT_R9G9B9E5_FLOAT;

-   case MESA_FORMAT_R11_G11_B10_FLOAT:

-      return PIPE_FORMAT_R11G11B10_FLOAT;

-

-   default:

-      assert(0);

-      return PIPE_FORMAT_NONE;

-   }

-}

-

-

-/**

- * Translate Gallium format to Mesa format.

- */

-gl_format

-st_pipe_format_to_mesa_format(enum pipe_format format)

-{

-   switch (format) {

-   case PIPE_FORMAT_A8B8G8R8_UNORM:

-      return MESA_FORMAT_RGBA8888;

-   case PIPE_FORMAT_R8G8B8A8_UNORM:

-      return MESA_FORMAT_RGBA8888_REV;

-   case PIPE_FORMAT_B8G8R8A8_UNORM:

-      return MESA_FORMAT_ARGB8888;

-   case PIPE_FORMAT_A8R8G8B8_UNORM:

-      return MESA_FORMAT_ARGB8888_REV;

-   case PIPE_FORMAT_B8G8R8X8_UNORM:

-      return MESA_FORMAT_XRGB8888;

-   case PIPE_FORMAT_X8R8G8B8_UNORM:

-      return MESA_FORMAT_XRGB8888_REV;

-   case PIPE_FORMAT_B5G5R5A1_UNORM:

-      return MESA_FORMAT_ARGB1555;

-   case PIPE_FORMAT_B4G4R4A4_UNORM:

-      return MESA_FORMAT_ARGB4444;

-   case PIPE_FORMAT_B5G6R5_UNORM:

-      return MESA_FORMAT_RGB565;

-   case PIPE_FORMAT_B2G3R3_UNORM:

-      return MESA_FORMAT_RGB332;

-   case PIPE_FORMAT_B10G10R10A2_UNORM:

-      return MESA_FORMAT_ARGB2101010;

-   case PIPE_FORMAT_L4A4_UNORM:

-      return MESA_FORMAT_AL44;

-   case PIPE_FORMAT_L8A8_UNORM:

-      return MESA_FORMAT_AL88;

-   case PIPE_FORMAT_L16A16_UNORM:

-      return MESA_FORMAT_AL1616;

-   case PIPE_FORMAT_A8_UNORM:

-      return MESA_FORMAT_A8;

-   case PIPE_FORMAT_A16_UNORM:

-      return MESA_FORMAT_A16;

-   case PIPE_FORMAT_L8_UNORM:

-      return MESA_FORMAT_L8;

-   case PIPE_FORMAT_L16_UNORM:

-      return MESA_FORMAT_L16;

-   case PIPE_FORMAT_I8_UNORM:

-      return MESA_FORMAT_I8;

-   case PIPE_FORMAT_I16_UNORM:

-      return MESA_FORMAT_I16;

-   case PIPE_FORMAT_S8_USCALED:

-      return MESA_FORMAT_S8;

-

-   case PIPE_FORMAT_R16G16B16A16_UNORM:

-      return MESA_FORMAT_RGBA_16;

-

-   case PIPE_FORMAT_Z16_UNORM:

-      return MESA_FORMAT_Z16;

-   case PIPE_FORMAT_Z32_UNORM:

-      return MESA_FORMAT_Z32;

-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:

-      return MESA_FORMAT_Z24_S8;

-   case PIPE_FORMAT_X8Z24_UNORM:

-      return MESA_FORMAT_Z24_X8;

-   case PIPE_FORMAT_Z24X8_UNORM:

-      return MESA_FORMAT_X8_Z24;

-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:

-      return MESA_FORMAT_S8_Z24;

-

-   case PIPE_FORMAT_UYVY:

-      return MESA_FORMAT_YCBCR;

-   case PIPE_FORMAT_YUYV:

-      return MESA_FORMAT_YCBCR_REV;

-

-#if FEATURE_texture_s3tc

-   case PIPE_FORMAT_DXT1_RGB:

-      return MESA_FORMAT_RGB_DXT1;

-   case PIPE_FORMAT_DXT1_RGBA:

-      return MESA_FORMAT_RGBA_DXT1;

-   case PIPE_FORMAT_DXT3_RGBA:

-      return MESA_FORMAT_RGBA_DXT3;

-   case PIPE_FORMAT_DXT5_RGBA:

-      return MESA_FORMAT_RGBA_DXT5;

-#if FEATURE_EXT_texture_sRGB

-   case PIPE_FORMAT_DXT1_SRGB:

-      return MESA_FORMAT_SRGB_DXT1;

-   case PIPE_FORMAT_DXT1_SRGBA:

-      return MESA_FORMAT_SRGBA_DXT1;

-   case PIPE_FORMAT_DXT3_SRGBA:

-      return MESA_FORMAT_SRGBA_DXT3;

-   case PIPE_FORMAT_DXT5_SRGBA:

-      return MESA_FORMAT_SRGBA_DXT5;

-#endif

-#endif

-

-#if FEATURE_EXT_texture_sRGB

-   case PIPE_FORMAT_L8A8_SRGB:

-      return MESA_FORMAT_SLA8;

-   case PIPE_FORMAT_L8_SRGB:

-      return MESA_FORMAT_SL8;

-   case PIPE_FORMAT_R8G8B8_SRGB:

-      return MESA_FORMAT_SRGB8;

-   case PIPE_FORMAT_A8B8G8R8_SRGB:

-      return MESA_FORMAT_SRGBA8;

-   case PIPE_FORMAT_B8G8R8A8_SRGB:

-      return MESA_FORMAT_SARGB8;

-#endif

-   case PIPE_FORMAT_R32G32B32A32_FLOAT:

-      return MESA_FORMAT_RGBA_FLOAT32;

-   case PIPE_FORMAT_R16G16B16A16_FLOAT:

-      return MESA_FORMAT_RGBA_FLOAT16;

-   case PIPE_FORMAT_R32G32B32_FLOAT:

-      return MESA_FORMAT_RGB_FLOAT32;

-   case PIPE_FORMAT_R16G16B16_FLOAT:

-      return MESA_FORMAT_RGB_FLOAT16;

-   case PIPE_FORMAT_L32A32_FLOAT:

-      return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;

-   case PIPE_FORMAT_L16A16_FLOAT:

-      return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;

-   case PIPE_FORMAT_L32_FLOAT:

-      return MESA_FORMAT_LUMINANCE_FLOAT32;

-   case PIPE_FORMAT_L16_FLOAT:

-      return MESA_FORMAT_LUMINANCE_FLOAT16;

-   case PIPE_FORMAT_A32_FLOAT:

-      return MESA_FORMAT_ALPHA_FLOAT32;

-   case PIPE_FORMAT_A16_FLOAT:

-      return MESA_FORMAT_ALPHA_FLOAT16;

-   case PIPE_FORMAT_I32_FLOAT:

-      return MESA_FORMAT_INTENSITY_FLOAT32;

-   case PIPE_FORMAT_I16_FLOAT:

-      return MESA_FORMAT_INTENSITY_FLOAT16;

-   case PIPE_FORMAT_R32_FLOAT:

-      return MESA_FORMAT_R_FLOAT32;

-   case PIPE_FORMAT_R16_FLOAT:

-      return MESA_FORMAT_R_FLOAT16;

-   case PIPE_FORMAT_R32G32_FLOAT:

-      return MESA_FORMAT_RG_FLOAT32;

-   case PIPE_FORMAT_R16G16_FLOAT:

-      return MESA_FORMAT_RG_FLOAT16;

-

-   case PIPE_FORMAT_R8_UNORM:

-      return MESA_FORMAT_R8;

-   case PIPE_FORMAT_R16_UNORM:

-      return MESA_FORMAT_R16;

-   case PIPE_FORMAT_R8G8_UNORM:

-      return MESA_FORMAT_RG88;

-   case PIPE_FORMAT_R16G16_UNORM:

-      return MESA_FORMAT_RG1616;

-

-   /* signed int formats */

-   case PIPE_FORMAT_R8G8B8A8_SSCALED:

-      return MESA_FORMAT_RGBA_INT8;

-   case PIPE_FORMAT_R16G16B16A16_SSCALED:

-      return MESA_FORMAT_RGBA_INT16;

-   case PIPE_FORMAT_R32G32B32A32_SSCALED:

-      return MESA_FORMAT_RGBA_INT32;

-

-   /* unsigned int formats */

-   case PIPE_FORMAT_R8G8B8A8_USCALED:

-      return MESA_FORMAT_RGBA_UINT8;

-   case PIPE_FORMAT_R16G16B16A16_USCALED:

-      return MESA_FORMAT_RGBA_UINT16;

-   case PIPE_FORMAT_R32G32B32A32_USCALED:

-      return MESA_FORMAT_RGBA_UINT32;

-

-   case PIPE_FORMAT_RGTC1_UNORM:

-      return MESA_FORMAT_RED_RGTC1;

-   case PIPE_FORMAT_RGTC1_SNORM:

-      return MESA_FORMAT_SIGNED_RED_RGTC1;

-   case PIPE_FORMAT_RGTC2_UNORM:

-      return MESA_FORMAT_RG_RGTC2;

-   case PIPE_FORMAT_RGTC2_SNORM:

-      return MESA_FORMAT_SIGNED_RG_RGTC2;

-

-   case PIPE_FORMAT_LATC1_UNORM:

-      return MESA_FORMAT_L_LATC1;

-   case PIPE_FORMAT_LATC1_SNORM:

-      return MESA_FORMAT_SIGNED_L_LATC1;

-   case PIPE_FORMAT_LATC2_UNORM:

-      return MESA_FORMAT_LA_LATC2;

-   case PIPE_FORMAT_LATC2_SNORM:

-      return MESA_FORMAT_SIGNED_LA_LATC2;

-

-   /* signed normalized formats */

-   case PIPE_FORMAT_R8_SNORM:

-      return MESA_FORMAT_SIGNED_R8;

-   case PIPE_FORMAT_R8G8_SNORM:

-      return MESA_FORMAT_SIGNED_RG88_REV;

-   case PIPE_FORMAT_R8G8B8A8_SNORM:

-      return MESA_FORMAT_SIGNED_RGBA8888_REV;

-

-   case PIPE_FORMAT_A8_SNORM:

-      return MESA_FORMAT_SIGNED_A8;

-   case PIPE_FORMAT_L8_SNORM:

-      return MESA_FORMAT_SIGNED_L8;

-   case PIPE_FORMAT_L8A8_SNORM:

-      return MESA_FORMAT_SIGNED_AL88;

-   case PIPE_FORMAT_I8_SNORM:

-      return MESA_FORMAT_SIGNED_I8;

-

-   case PIPE_FORMAT_R16_SNORM:

-      return MESA_FORMAT_SIGNED_R16;

-   case PIPE_FORMAT_R16G16_SNORM:

-      return MESA_FORMAT_SIGNED_GR1616;

-   case PIPE_FORMAT_R16G16B16A16_SNORM:

-      return MESA_FORMAT_SIGNED_RGBA_16;

-

-   case PIPE_FORMAT_A16_SNORM:

-      return MESA_FORMAT_SIGNED_A16;

-   case PIPE_FORMAT_L16_SNORM:

-      return MESA_FORMAT_SIGNED_L16;

-   case PIPE_FORMAT_L16A16_SNORM:

-      return MESA_FORMAT_SIGNED_AL1616;

-   case PIPE_FORMAT_I16_SNORM:

-      return MESA_FORMAT_SIGNED_I16;

-

-   case PIPE_FORMAT_R9G9B9E5_FLOAT:

-      return MESA_FORMAT_RGB9_E5_FLOAT;

-   case PIPE_FORMAT_R11G11B10_FLOAT:

-      return MESA_FORMAT_R11_G11_B10_FLOAT;

-

-   default:

-      assert(0);

-      return MESA_FORMAT_NONE;

-   }

-}

-

-

-/**

- * Return first supported format from the given list.

- */

-static enum pipe_format

-find_supported_format(struct pipe_screen *screen, 

-                      const enum pipe_format formats[],

-                      uint num_formats,

-                      enum pipe_texture_target target,

-                      unsigned sample_count,

-                      unsigned tex_usage)

-{

-   uint i;

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

-      if (screen->is_format_supported(screen, formats[i], target,

-                                      sample_count, tex_usage)) {

-         return formats[i];

-      }

-   }

-   return PIPE_FORMAT_NONE;

-}

-

-

-/**

- * Find an RGBA format supported by the context/winsys.

- */

-static enum pipe_format

-default_rgba_format(struct pipe_screen *screen, 

-                    enum pipe_texture_target target,

-                    unsigned sample_count,

-                    unsigned tex_usage)

-{

-   static const enum pipe_format colorFormats[] = {

-      PIPE_FORMAT_B8G8R8A8_UNORM,

-      PIPE_FORMAT_A8R8G8B8_UNORM,

-      PIPE_FORMAT_A8B8G8R8_UNORM,

-      PIPE_FORMAT_B5G6R5_UNORM

-   };

-   return find_supported_format(screen, colorFormats, Elements(colorFormats),

-                                target, sample_count, tex_usage);

-}

-

-

-/**

- * Find an RGB format supported by the context/winsys.

- */

-static enum pipe_format

-default_rgb_format(struct pipe_screen *screen, 

-                   enum pipe_texture_target target,

-                   unsigned sample_count,

-                   unsigned tex_usage)

-{

-   static const enum pipe_format colorFormats[] = {

-      PIPE_FORMAT_B8G8R8X8_UNORM,

-      PIPE_FORMAT_X8R8G8B8_UNORM,

-      PIPE_FORMAT_X8B8G8R8_UNORM,

-      PIPE_FORMAT_B8G8R8A8_UNORM,

-      PIPE_FORMAT_A8R8G8B8_UNORM,

-      PIPE_FORMAT_A8B8G8R8_UNORM,

-      PIPE_FORMAT_B5G6R5_UNORM

-   };

-   return find_supported_format(screen, colorFormats, Elements(colorFormats),

-                                target, sample_count, tex_usage);

-}

-

-/**

- * Find an sRGBA format supported by the context/winsys.

- */

-static enum pipe_format

-default_srgba_format(struct pipe_screen *screen, 

-                    enum pipe_texture_target target,

-                    unsigned sample_count,

-                    unsigned tex_usage)

-{

-   static const enum pipe_format colorFormats[] = {

-      PIPE_FORMAT_B8G8R8A8_SRGB,

-      PIPE_FORMAT_A8R8G8B8_SRGB,

-      PIPE_FORMAT_A8B8G8R8_SRGB,

-   };

-   return find_supported_format(screen, colorFormats, Elements(colorFormats),

-                                target, sample_count, tex_usage);

-}

-

-

-/**

- * Given an OpenGL internalFormat value for a texture or surface, return

- * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.

- * This is called during glTexImage2D, for example.

- *

- * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus

- * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if

- * we want render-to-texture ability.

- *

- * \param internalFormat  the user value passed to glTexImage2D

- * \param target  one of PIPE_TEXTURE_x

- * \param bindings  bitmask of PIPE_BIND_x flags.

- */

-enum pipe_format

-st_choose_format(struct pipe_screen *screen, GLenum internalFormat,

-                 enum pipe_texture_target target, unsigned sample_count,

-                 unsigned bindings)

-{

-

-   switch (internalFormat) {

-   case GL_RGB10:

-   case GL_RGB10_A2:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B10G10R10A2_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B10G10R10A2_UNORM;

-      /* Pass through. */

-   case 4:

-   case GL_RGBA:

-   case GL_RGBA8:

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_BGRA:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B8G8R8A8_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B8G8R8A8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case 3:

-   case GL_RGB:

-   case GL_RGB8:

-      return default_rgb_format( screen, target, sample_count, bindings);

-

-   case GL_RGB12:

-   case GL_RGB16:

-   case GL_RGBA12:

-   case GL_RGBA16:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_R16G16B16A16_UNORM,

-                                             target, sample_count, bindings))

-         return PIPE_FORMAT_R16G16B16A16_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_RGBA4:

-   case GL_RGBA2:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B4G4R4A4_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B4G4R4A4_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_RGB5_A1:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B5G5R5A1_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_R3_G3_B2:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B2G3R3_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B2G3R3_UNORM;

-      /* Pass through. */

-   case GL_RGB5:

-   case GL_RGB4:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B5G6R5_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B5G6R5_UNORM;

-      if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,

-                                       target, sample_count, bindings))

-         return PIPE_FORMAT_B5G5R5A1_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_ALPHA12:

-   case GL_ALPHA16:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_A16_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_A16_UNORM;

-      /* Pass through. */

-   case GL_ALPHA:

-   case GL_ALPHA4:

-   case GL_ALPHA8:

-   case GL_COMPRESSED_ALPHA:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_A8_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_A8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_LUMINANCE12:

-   case GL_LUMINANCE16:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L16_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L16_UNORM;

-      /* Pass through. */

-   case 1:

-   case GL_LUMINANCE:

-   case GL_LUMINANCE4:

-   case GL_LUMINANCE8:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L8_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_LUMINANCE12_ALPHA4:

-   case GL_LUMINANCE12_ALPHA12:

-   case GL_LUMINANCE16_ALPHA16:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L16A16_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L16A16_UNORM;

-      /* Pass through. */

-   case 2:

-   case GL_LUMINANCE_ALPHA:

-   case GL_LUMINANCE6_ALPHA2:

-   case GL_LUMINANCE8_ALPHA8:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L8A8_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L8A8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_LUMINANCE4_ALPHA4:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L4A4_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L4A4_UNORM;

-      if (screen->is_format_supported( screen, PIPE_FORMAT_L8A8_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_L8A8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_INTENSITY12:

-   case GL_INTENSITY16:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_I16_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_I16_UNORM;

-      /* Pass through. */

-   case GL_INTENSITY:

-   case GL_INTENSITY4:

-   case GL_INTENSITY8:

-   case GL_COMPRESSED_INTENSITY:

-      if (screen->is_format_supported( screen, PIPE_FORMAT_I8_UNORM, target,

-                                       sample_count, bindings))

-         return PIPE_FORMAT_I8_UNORM;

-      return default_rgba_format( screen, target, sample_count, bindings);

-

-   case GL_YCBCR_MESA:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY, target,

-                                      sample_count, bindings)) {

-         return PIPE_FORMAT_UYVY;

-      }

-      if (screen->is_format_supported(screen, PIPE_FORMAT_YUYV, target,

-                                      sample_count, bindings)) {

-         return PIPE_FORMAT_YUYV;

-      }

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_RGB:

-      /* can only sample from compressed formats */

-      if (bindings & ~PIPE_BIND_SAMPLER_VIEW)

-         return PIPE_FORMAT_NONE;

-      else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,

-                                           target, sample_count, bindings))

-         return PIPE_FORMAT_DXT1_RGB;

-      else

-         return default_rgb_format(screen, target, sample_count, bindings);

-

-   case GL_COMPRESSED_RGBA:

-      /* can only sample from compressed formats */

-      if (bindings & ~PIPE_BIND_SAMPLER_VIEW)

-         return PIPE_FORMAT_NONE;

-      else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,

-                                           target, sample_count, bindings))

-         return PIPE_FORMAT_DXT3_RGBA;

-      else

-         return default_rgba_format(screen, target, sample_count, bindings);

-

-   case GL_RGB_S3TC:

-   case GL_RGB4_S3TC:

-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_DXT1_RGB;

-      else

-         return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGBA,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_DXT1_RGBA;

-      else

-         return PIPE_FORMAT_NONE;

-

-   case GL_RGBA_S3TC:

-   case GL_RGBA4_S3TC:

-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_DXT3_RGBA;

-      else

-         return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_DXT5_RGBA;

-      else

-         return PIPE_FORMAT_NONE;

-

-#if 0

-   case GL_COMPRESSED_RGB_FXT1_3DFX:

-      return PIPE_FORMAT_RGB_FXT1;

-   case GL_COMPRESSED_RGBA_FXT1_3DFX:

-      return PIPE_FORMAT_RGB_FXT1;

-#endif

-

-   case GL_DEPTH_COMPONENT16:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_Z16_UNORM, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_Z16_UNORM;

-      /* fall-through */

-   case GL_DEPTH_COMPONENT24:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_Z24_UNORM_S8_USCALED;

-      if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,

-                                      target, sample_count, bindings))

-         return PIPE_FORMAT_S8_USCALED_Z24_UNORM;

-      /* fall-through */

-   case GL_DEPTH_COMPONENT32:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_Z32_UNORM, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_Z32_UNORM;

-      /* fall-through */

-   case GL_DEPTH_COMPONENT:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_Z32_UNORM,

-            PIPE_FORMAT_Z24_UNORM_S8_USCALED,

-            PIPE_FORMAT_S8_USCALED_Z24_UNORM,

-            PIPE_FORMAT_Z16_UNORM

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-

-   case GL_STENCIL_INDEX:

-   case GL_STENCIL_INDEX1_EXT:

-   case GL_STENCIL_INDEX4_EXT:

-   case GL_STENCIL_INDEX8_EXT:

-   case GL_STENCIL_INDEX16_EXT:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_S8_USCALED,

-            PIPE_FORMAT_Z24_UNORM_S8_USCALED,

-            PIPE_FORMAT_S8_USCALED_Z24_UNORM

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-

-   case GL_DEPTH_STENCIL_EXT:

-   case GL_DEPTH24_STENCIL8_EXT:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_Z24_UNORM_S8_USCALED,

-            PIPE_FORMAT_S8_USCALED_Z24_UNORM

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-

-   case GL_SRGB_EXT:

-   case GL_SRGB8_EXT:

-   case GL_SRGB_ALPHA_EXT:

-   case GL_SRGB8_ALPHA8_EXT:

-      return default_srgba_format( screen, target, sample_count, bindings);

-

-   case GL_COMPRESSED_SRGB_EXT:

-   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_SRGB, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_DXT1_SRGB;

-      return default_srgba_format( screen, target, sample_count, bindings);

-

-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

-      return PIPE_FORMAT_DXT1_SRGBA;

-

-   case GL_COMPRESSED_SRGB_ALPHA_EXT:

-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_SRGBA, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_DXT3_SRGBA;

-      return default_srgba_format( screen, target, sample_count, bindings);

-

-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

-      return PIPE_FORMAT_DXT5_SRGBA;

-

-   case GL_SLUMINANCE_ALPHA_EXT:

-   case GL_SLUMINANCE8_ALPHA8_EXT:

-   case GL_COMPRESSED_SLUMINANCE_EXT:

-   case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_L8A8_SRGB, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_L8A8_SRGB;

-      return default_srgba_format( screen, target, sample_count, bindings);

-

-   case GL_SLUMINANCE_EXT:

-   case GL_SLUMINANCE8_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_L8_SRGB, target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_L8_SRGB;

-      return default_srgba_format( screen, target, sample_count, bindings);

-

-   /* prefer formats in order of data size, choosing 16-bit ones if equal sized */

-   case GL_RGBA16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-   case GL_RGB16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R16G16B16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_R32G32B32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-   case GL_LUMINANCE_ALPHA16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_ALPHA16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_A16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_A32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_INTENSITY16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_I16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_I32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_LUMINANCE16F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_L16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_L32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_R16F:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R16_FLOAT,

-               PIPE_FORMAT_R16G16_FLOAT,

-               PIPE_FORMAT_R32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_R32G32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_RG16F:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R16G16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT,

-               PIPE_FORMAT_R32G32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   /* try a 32-bit format if available, otherwise fallback to a 16-bit one */

-   case GL_RGBA32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-   case GL_RGB32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R32G32B32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-                                      target, sample_count, bindings);

-      }

-   case GL_LUMINANCE_ALPHA32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_ALPHA32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_A32_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_A16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_INTENSITY32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_I32_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_I16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_LUMINANCE32F_ARB:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_L32_FLOAT,

-               PIPE_FORMAT_L32A32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_L16_FLOAT,

-               PIPE_FORMAT_L16A16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_R32F:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R32_FLOAT,

-               PIPE_FORMAT_R32G32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_R16_FLOAT,

-               PIPE_FORMAT_R16G16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-   case GL_RG32F:

-      {

-         static const enum pipe_format formats[] = {

-               PIPE_FORMAT_R32G32_FLOAT,

-               PIPE_FORMAT_R32G32B32A32_FLOAT,

-               PIPE_FORMAT_R16G16_FLOAT,

-               PIPE_FORMAT_R16G16B16A16_FLOAT

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_RED:

-   case GL_R8:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R8_UNORM;

-      return PIPE_FORMAT_NONE;

-   case GL_RG:

-   case GL_RG8:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R8G8_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_R16:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R16_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_RG16:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R16G16_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_RED:

-   case GL_COMPRESSED_RED_RGTC1:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_RGTC1_UNORM;

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R8_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_SIGNED_RED_RGTC1:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_SNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_RGTC1_SNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_RG:

-   case GL_COMPRESSED_RG_RGTC2:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_RGTC2_UNORM;

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_R8G8_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_SIGNED_RG_RGTC2:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_SNORM, target,

-                                      sample_count, bindings))

-	      return PIPE_FORMAT_RGTC2_SNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_LUMINANCE:

-   case GL_COMPRESSED_LUMINANCE_LATC1_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_LATC1_UNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_LATC1_UNORM;

-      if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_L8_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_LATC1_SNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_LATC1_SNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_LUMINANCE_ALPHA:

-   case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:

-   case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_LATC2_UNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_LATC2_UNORM;

-      if (screen->is_format_supported(screen, PIPE_FORMAT_L8A8_UNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_L8A8_UNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_LATC2_SNORM, target,

-                                      sample_count, bindings))

-              return PIPE_FORMAT_LATC2_SNORM;

-      return PIPE_FORMAT_NONE;

-

-   /* signed/unsigned integer formats.

-    * XXX Mesa only has formats for RGBA signed/unsigned integer formats.

-    * If/when new formats are added this code should be updated.

-    */

-   case GL_RED_INTEGER_EXT:

-   case GL_GREEN_INTEGER_EXT:

-   case GL_BLUE_INTEGER_EXT:

-   case GL_ALPHA_INTEGER_EXT:

-   case GL_RGB_INTEGER_EXT:

-   case GL_RGBA_INTEGER_EXT:

-   case GL_BGR_INTEGER_EXT:

-   case GL_BGRA_INTEGER_EXT:

-   case GL_LUMINANCE_INTEGER_EXT:

-   case GL_LUMINANCE_ALPHA_INTEGER_EXT:

-      /* fall-through */

-   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:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SSCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R8G8B8A8_SSCALED;

-      return PIPE_FORMAT_NONE;

-   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:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_SSCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R16G16B16A16_SSCALED;

-      return PIPE_FORMAT_NONE;

-   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:

-      /* xxx */

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_SSCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R32G32B32A32_SSCALED;

-      return PIPE_FORMAT_NONE;

-

-   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:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_USCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R8G8B8A8_USCALED;

-      return PIPE_FORMAT_NONE;

-

-   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:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_USCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R16G16B16A16_USCALED;

-      return PIPE_FORMAT_NONE;

-

-   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:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_USCALED,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R32G32B32A32_USCALED;

-      return PIPE_FORMAT_NONE;

-

-   /* signed normalized formats */

-   case GL_RED_SNORM:

-   case GL_R8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_R8_SNORM,

-            PIPE_FORMAT_R8G8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_R16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_R16_SNORM,

-            PIPE_FORMAT_R16G16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_R8_SNORM,

-            PIPE_FORMAT_R8G8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_RG_SNORM:

-   case GL_RG8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_R8G8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_RG16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_R16G16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_R8G8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_RGB_SNORM:

-   case GL_RGB8_SNORM:

-   case GL_RGBA_SNORM:

-   case GL_RGBA8_SNORM:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SNORM,

-                                      target,

-                                      sample_count, bindings))

-         return PIPE_FORMAT_R8G8B8A8_SNORM;

-      return PIPE_FORMAT_NONE;

-

-   case GL_RGB16_SNORM:

-   case GL_RGBA16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-

-   case GL_ALPHA_SNORM:

-   case GL_ALPHA8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_A8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_ALPHA16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_A16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_A8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_LUMINANCE_SNORM:

-   case GL_LUMINANCE8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_L8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_LUMINANCE16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_L16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_L8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_LUMINANCE_ALPHA_SNORM:

-   case GL_LUMINANCE8_ALPHA8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_L8A8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_LUMINANCE16_ALPHA16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_L16A16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_L8A8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_INTENSITY_SNORM:

-   case GL_INTENSITY8_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_I8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_INTENSITY16_SNORM:

-      {

-         static const enum pipe_format formats[] = {

-            PIPE_FORMAT_I16_SNORM,

-            PIPE_FORMAT_R16G16B16A16_SNORM,

-            PIPE_FORMAT_I8_SNORM,

-            PIPE_FORMAT_R8G8B8A8_SNORM,

-         };

-         return find_supported_format(screen, formats, Elements(formats),

-               target, sample_count, bindings);

-      }

-

-   case GL_RGB9_E5:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R9G9B9E5_FLOAT, target,

-                                      sample_count, bindings)) {

-         return PIPE_FORMAT_R9G9B9E5_FLOAT;

-      }

-      return PIPE_FORMAT_NONE;

-

-   case GL_R11F_G11F_B10F:

-      if (screen->is_format_supported(screen, PIPE_FORMAT_R11G11B10_FLOAT, target,

-                                      sample_count, bindings)) {

-         return PIPE_FORMAT_R11G11B10_FLOAT;

-      }

-      return PIPE_FORMAT_NONE;

-

-   default:

-      return PIPE_FORMAT_NONE;

-   }

-}

-

-

-/**

- * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.

- */

-enum pipe_format

-st_choose_renderbuffer_format(struct pipe_screen *screen,

-                              GLenum internalFormat, unsigned sample_count)

-{

-   uint usage;

-   if (_mesa_is_depth_or_stencil_format(internalFormat))

-      usage = PIPE_BIND_DEPTH_STENCIL;

-   else

-      usage = PIPE_BIND_RENDER_TARGET;

-   return st_choose_format(screen, internalFormat, PIPE_TEXTURE_2D,

-                           sample_count, usage);

-}

-

-

-/**

- * Called via ctx->Driver.chooseTextureFormat().

- */

-gl_format

-st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,

-				  GLenum format, GLenum type, GLboolean renderable)

-{

-   struct pipe_screen *screen = st_context(ctx)->pipe->screen;

-   enum pipe_format pFormat;

-   uint bindings;

-

-   (void) format;

-   (void) type;

-

-   /* GL textures may wind up being render targets, but we don't know

-    * that in advance.  Specify potential render target flags now.

-    */

-   bindings = PIPE_BIND_SAMPLER_VIEW;

-   if (renderable == GL_TRUE) {

-      if (_mesa_is_depth_format(internalFormat) ||

-	  _mesa_is_depth_or_stencil_format(internalFormat))

-	 bindings |= PIPE_BIND_DEPTH_STENCIL;

-      else 

-	 bindings |= PIPE_BIND_RENDER_TARGET;

-   }

-

-   pFormat = st_choose_format(screen, internalFormat,

-                              PIPE_TEXTURE_2D, 0, bindings);

-

-   if (pFormat == PIPE_FORMAT_NONE) {

-      /* try choosing format again, this time without render target bindings */

-      pFormat = st_choose_format(screen, internalFormat,

-                                 PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);

-   }

-

-   if (pFormat == PIPE_FORMAT_NONE) {

-      /* no luck at all */

-      return MESA_FORMAT_NONE;

-   }

-

-   return st_pipe_format_to_mesa_format(pFormat);

-}

-

-gl_format

-st_ChooseTextureFormat(struct gl_context *ctx, GLint internalFormat,

-                       GLenum format, GLenum type)

-{

-   boolean want_renderable =

-      internalFormat == 3 || internalFormat == 4 ||

-      internalFormat == GL_RGB || internalFormat == GL_RGBA ||

-      internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||

-      internalFormat == GL_BGRA;

-

-   return st_ChooseTextureFormat_renderable(ctx, internalFormat,

-					    format, type, want_renderable);

-}

-

-/**

- * Test if a gallium format is equivalent to a GL format/type.

- */

-GLboolean

-st_equal_formats(enum pipe_format pFormat, GLenum format, GLenum type)

-{

-   switch (pFormat) {

-   case PIPE_FORMAT_A8B8G8R8_UNORM:

-      return format == GL_RGBA && type == GL_UNSIGNED_BYTE;

-   case PIPE_FORMAT_A8R8G8B8_UNORM:

-      return format == GL_BGRA && type == GL_UNSIGNED_BYTE;

-   case PIPE_FORMAT_B5G6R5_UNORM:

-      return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;

-   /* XXX more combos... */

-   default:

-      return GL_FALSE;

-   }

-}

-

-GLboolean

-st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)

-{

-   if (format1 == format2)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&

-       format2 == PIPE_FORMAT_B8G8R8X8_UNORM)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&

-       format2 == PIPE_FORMAT_B8G8R8A8_UNORM)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&

-       format2 == PIPE_FORMAT_X8B8G8R8_UNORM)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&

-       format2 == PIPE_FORMAT_A8B8G8R8_UNORM)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&

-       format2 == PIPE_FORMAT_X8R8G8B8_UNORM)

-      return GL_TRUE;

-

-   if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&

-       format2 == PIPE_FORMAT_A8R8G8B8_UNORM)

-      return GL_TRUE;

-

-   return GL_FALSE;

-}

-

-

-

-/**

- * This is used for translating texture border color and the clear

- * color.  For example, the clear color is interpreted according to

- * the renderbuffer's base format.  For example, if clearing a

- * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =

- * alpha.  Similarly for texture border colors.

- */

-void

-st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,

-                   GLfloat colorOut[4])

-{

-   switch (baseFormat) {

-   case GL_RED:

-      colorOut[0] = colorIn[0];

-      colorOut[1] = 0.0F;

-      colorOut[2] = 0.0F;

-      colorOut[3] = 1.0F;

-      break;

-   case GL_RG:

-      colorOut[0] = colorIn[0];

-      colorOut[1] = colorIn[1];

-      colorOut[2] = 0.0F;

-      colorOut[3] = 1.0F;

-      break;

-   case GL_RGB:

-      colorOut[0] = colorIn[0];

-      colorOut[1] = colorIn[1];

-      colorOut[2] = colorIn[2];

-      colorOut[3] = 1.0F;

-      break;

-   case GL_ALPHA:

-      colorOut[0] = colorOut[1] = colorOut[2] = 0.0;

-      colorOut[3] = colorIn[3];

-      break;

-   case GL_LUMINANCE:

-      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];

-      colorOut[3] = 1.0;

-      break;

-   case GL_LUMINANCE_ALPHA:

-      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];

-      colorOut[3] = colorIn[3];

-      break;

-   case GL_INTENSITY:

-      colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];

-      break;

-   default:

-      COPY_4V(colorOut, colorIn);

-   }

-}

+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright (c) 2008-2010 VMware, Inc.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+
+/**
+ * Mesa / Gallium format conversion and format selection code.
+ * \author Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/texstore.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/mfeatures.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "util/u_format.h"
+#include "st_context.h"
+#include "st_format.h"
+
+
+static GLuint
+format_max_bits(enum pipe_format format)
+{
+   GLuint size = util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 0);
+
+   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 1));
+   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 2));
+   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 3));
+   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0));
+   size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1));
+   return size;
+}
+
+
+/**
+ * Return basic GL datatype for the given gallium format.
+ */
+GLenum
+st_format_datatype(enum pipe_format format)
+{
+   const struct util_format_description *desc;
+
+   desc = util_format_description(format);
+   assert(desc);
+
+   if (desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) {
+      if (format == PIPE_FORMAT_B5G5R5A1_UNORM ||
+          format == PIPE_FORMAT_B5G6R5_UNORM) {
+         return GL_UNSIGNED_SHORT;
+      }
+      else if (format == PIPE_FORMAT_Z24_UNORM_S8_USCALED ||
+               format == PIPE_FORMAT_S8_USCALED_Z24_UNORM ||
+               format == PIPE_FORMAT_Z24X8_UNORM ||
+               format == PIPE_FORMAT_X8Z24_UNORM) {
+         return GL_UNSIGNED_INT_24_8;
+      }
+      else {
+         const GLuint size = format_max_bits(format);
+         if (size == 8) {
+            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
+               return GL_UNSIGNED_BYTE;
+            else
+               return GL_BYTE;
+         }
+         else if (size == 16) {
+            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
+               return GL_UNSIGNED_SHORT;
+            else
+               return GL_SHORT;
+         }
+         else {
+            assert( size <= 32 );
+            if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
+               return GL_UNSIGNED_INT;
+            else
+               return GL_INT;
+         }
+      }
+   }
+   else if (format == PIPE_FORMAT_UYVY) {
+      return GL_UNSIGNED_SHORT;
+   }
+   else if (format == PIPE_FORMAT_YUYV) {
+      return GL_UNSIGNED_SHORT;
+   }
+   else {
+      /* probably a compressed format, unsupported anyway */
+      return GL_NONE;
+   }
+}
+
+
+/**
+ * Translate Mesa format to Gallium format.
+ */
+enum pipe_format
+st_mesa_format_to_pipe_format(gl_format mesaFormat)
+{
+   switch (mesaFormat) {
+   case MESA_FORMAT_RGBA8888:
+      return PIPE_FORMAT_A8B8G8R8_UNORM;
+   case MESA_FORMAT_RGBA8888_REV:
+      return PIPE_FORMAT_R8G8B8A8_UNORM;
+   case MESA_FORMAT_ARGB8888:
+      return PIPE_FORMAT_B8G8R8A8_UNORM;
+   case MESA_FORMAT_ARGB8888_REV:
+      return PIPE_FORMAT_A8R8G8B8_UNORM;
+   case MESA_FORMAT_XRGB8888:
+      return PIPE_FORMAT_B8G8R8X8_UNORM;
+   case MESA_FORMAT_XRGB8888_REV:
+      return PIPE_FORMAT_X8R8G8B8_UNORM;
+   case MESA_FORMAT_ARGB1555:
+      return PIPE_FORMAT_B5G5R5A1_UNORM;
+   case MESA_FORMAT_ARGB4444:
+      return PIPE_FORMAT_B4G4R4A4_UNORM;
+   case MESA_FORMAT_RGB565:
+      return PIPE_FORMAT_B5G6R5_UNORM;
+   case MESA_FORMAT_RGB332:
+      return PIPE_FORMAT_B2G3R3_UNORM;
+   case MESA_FORMAT_ARGB2101010:
+      return PIPE_FORMAT_B10G10R10A2_UNORM;
+   case MESA_FORMAT_AL44:
+      return PIPE_FORMAT_L4A4_UNORM;
+   case MESA_FORMAT_AL88:
+      return PIPE_FORMAT_L8A8_UNORM;
+   case MESA_FORMAT_AL1616:
+      return PIPE_FORMAT_L16A16_UNORM;
+   case MESA_FORMAT_A8:
+      return PIPE_FORMAT_A8_UNORM;
+   case MESA_FORMAT_A16:
+      return PIPE_FORMAT_A16_UNORM;
+   case MESA_FORMAT_L8:
+      return PIPE_FORMAT_L8_UNORM;
+   case MESA_FORMAT_L16:
+      return PIPE_FORMAT_L16_UNORM;
+   case MESA_FORMAT_I8:
+      return PIPE_FORMAT_I8_UNORM;
+   case MESA_FORMAT_I16:
+      return PIPE_FORMAT_I16_UNORM;
+   case MESA_FORMAT_Z16:
+      return PIPE_FORMAT_Z16_UNORM;
+   case MESA_FORMAT_Z32:
+      return PIPE_FORMAT_Z32_UNORM;
+   case MESA_FORMAT_Z24_S8:
+      return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
+   case MESA_FORMAT_S8_Z24:
+      return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
+   case MESA_FORMAT_Z24_X8:
+      return PIPE_FORMAT_X8Z24_UNORM;
+   case MESA_FORMAT_X8_Z24:
+      return PIPE_FORMAT_Z24X8_UNORM;
+   case MESA_FORMAT_S8:
+      return PIPE_FORMAT_S8_USCALED;
+   case MESA_FORMAT_YCBCR:
+      return PIPE_FORMAT_UYVY;
+#if FEATURE_texture_s3tc
+   case MESA_FORMAT_RGB_DXT1:
+      return PIPE_FORMAT_DXT1_RGB;
+   case MESA_FORMAT_RGBA_DXT1:
+      return PIPE_FORMAT_DXT1_RGBA;
+   case MESA_FORMAT_RGBA_DXT3:
+      return PIPE_FORMAT_DXT3_RGBA;
+   case MESA_FORMAT_RGBA_DXT5:
+      return PIPE_FORMAT_DXT5_RGBA;
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGB_DXT1:
+      return PIPE_FORMAT_DXT1_SRGB;
+   case MESA_FORMAT_SRGBA_DXT1:
+      return PIPE_FORMAT_DXT1_SRGBA;
+   case MESA_FORMAT_SRGBA_DXT3:
+      return PIPE_FORMAT_DXT3_SRGBA;
+   case MESA_FORMAT_SRGBA_DXT5:
+      return PIPE_FORMAT_DXT5_SRGBA;
+#endif
+#endif
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SLA8:
+      return PIPE_FORMAT_L8A8_SRGB;
+   case MESA_FORMAT_SL8:
+      return PIPE_FORMAT_L8_SRGB;
+   case MESA_FORMAT_SRGB8:
+      return PIPE_FORMAT_R8G8B8_SRGB;
+   case MESA_FORMAT_SRGBA8:
+      return PIPE_FORMAT_A8B8G8R8_SRGB;
+   case MESA_FORMAT_SARGB8:
+      return PIPE_FORMAT_B8G8R8A8_SRGB;
+#endif
+   case MESA_FORMAT_RGBA_FLOAT32:
+      return PIPE_FORMAT_R32G32B32A32_FLOAT;
+   case MESA_FORMAT_RGBA_FLOAT16:
+      return PIPE_FORMAT_R16G16B16A16_FLOAT;
+   case MESA_FORMAT_RGB_FLOAT32:
+      return PIPE_FORMAT_R32G32B32_FLOAT;
+   case MESA_FORMAT_RGB_FLOAT16:
+      return PIPE_FORMAT_R16G16B16_FLOAT;
+   case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
+      return PIPE_FORMAT_L32A32_FLOAT;
+   case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
+      return PIPE_FORMAT_L16A16_FLOAT;
+   case MESA_FORMAT_LUMINANCE_FLOAT32:
+      return PIPE_FORMAT_L32_FLOAT;
+   case MESA_FORMAT_LUMINANCE_FLOAT16:
+      return PIPE_FORMAT_L16_FLOAT;
+   case MESA_FORMAT_ALPHA_FLOAT32:
+      return PIPE_FORMAT_A32_FLOAT;
+   case MESA_FORMAT_ALPHA_FLOAT16:
+      return PIPE_FORMAT_A16_FLOAT;
+   case MESA_FORMAT_INTENSITY_FLOAT32:
+      return PIPE_FORMAT_I32_FLOAT;
+   case MESA_FORMAT_INTENSITY_FLOAT16:
+      return PIPE_FORMAT_I16_FLOAT;
+   case MESA_FORMAT_R_FLOAT32:
+      return PIPE_FORMAT_R32_FLOAT;
+   case MESA_FORMAT_R_FLOAT16:
+      return PIPE_FORMAT_R16_FLOAT;
+   case MESA_FORMAT_RG_FLOAT32:
+      return PIPE_FORMAT_R32G32_FLOAT;
+   case MESA_FORMAT_RG_FLOAT16:
+      return PIPE_FORMAT_R16G16_FLOAT;
+
+   case MESA_FORMAT_R8:
+      return PIPE_FORMAT_R8_UNORM;
+   case MESA_FORMAT_R16:
+      return PIPE_FORMAT_R16_UNORM;
+   case MESA_FORMAT_RG88:
+      return PIPE_FORMAT_R8G8_UNORM;
+   case MESA_FORMAT_RG1616:
+      return PIPE_FORMAT_R16G16_UNORM;
+   case MESA_FORMAT_RGBA_16:
+      return PIPE_FORMAT_R16G16B16A16_UNORM;
+
+   /* signed int formats */
+   case MESA_FORMAT_RGBA_INT8:
+      return PIPE_FORMAT_R8G8B8A8_SSCALED;
+   case MESA_FORMAT_RGBA_INT16:
+      return PIPE_FORMAT_R16G16B16A16_SSCALED;
+   case MESA_FORMAT_RGBA_INT32:
+      return PIPE_FORMAT_R32G32B32A32_SSCALED;
+
+   /* unsigned int formats */
+   case MESA_FORMAT_RGBA_UINT8:
+      return PIPE_FORMAT_R8G8B8A8_USCALED;
+   case MESA_FORMAT_RGBA_UINT16:
+      return PIPE_FORMAT_R16G16B16A16_USCALED;
+   case MESA_FORMAT_RGBA_UINT32:
+      return PIPE_FORMAT_R32G32B32A32_USCALED;
+
+   case MESA_FORMAT_RED_RGTC1:
+      return PIPE_FORMAT_RGTC1_UNORM;
+   case MESA_FORMAT_SIGNED_RED_RGTC1:
+      return PIPE_FORMAT_RGTC1_SNORM;
+   case MESA_FORMAT_RG_RGTC2:
+      return PIPE_FORMAT_RGTC2_UNORM;
+   case MESA_FORMAT_SIGNED_RG_RGTC2:
+      return PIPE_FORMAT_RGTC2_SNORM;
+
+   case MESA_FORMAT_L_LATC1:
+      return PIPE_FORMAT_LATC1_UNORM;
+   case MESA_FORMAT_SIGNED_L_LATC1:
+      return PIPE_FORMAT_LATC1_SNORM;
+   case MESA_FORMAT_LA_LATC2:
+      return PIPE_FORMAT_LATC2_UNORM;
+   case MESA_FORMAT_SIGNED_LA_LATC2:
+      return PIPE_FORMAT_LATC2_SNORM;
+
+   /* signed normalized formats */
+   case MESA_FORMAT_SIGNED_R8:
+      return PIPE_FORMAT_R8_SNORM;
+   case MESA_FORMAT_SIGNED_RG88_REV:
+      return PIPE_FORMAT_R8G8_SNORM;
+   case MESA_FORMAT_SIGNED_RGBA8888_REV:
+      return PIPE_FORMAT_R8G8B8A8_SNORM;
+
+   case MESA_FORMAT_SIGNED_A8:
+      return PIPE_FORMAT_A8_SNORM;
+   case MESA_FORMAT_SIGNED_L8:
+      return PIPE_FORMAT_L8_SNORM;
+   case MESA_FORMAT_SIGNED_AL88:
+      return PIPE_FORMAT_L8A8_SNORM;
+   case MESA_FORMAT_SIGNED_I8:
+      return PIPE_FORMAT_I8_SNORM;
+
+   case MESA_FORMAT_SIGNED_R16:
+      return PIPE_FORMAT_R16_SNORM;
+   case MESA_FORMAT_SIGNED_GR1616:
+      return PIPE_FORMAT_R16G16_SNORM;
+   case MESA_FORMAT_SIGNED_RGBA_16:
+      return PIPE_FORMAT_R16G16B16A16_SNORM;
+
+   case MESA_FORMAT_SIGNED_A16:
+      return PIPE_FORMAT_A16_SNORM;
+   case MESA_FORMAT_SIGNED_L16:
+      return PIPE_FORMAT_L16_SNORM;
+   case MESA_FORMAT_SIGNED_AL1616:
+      return PIPE_FORMAT_L16A16_SNORM;
+   case MESA_FORMAT_SIGNED_I16:
+      return PIPE_FORMAT_I16_SNORM;
+
+   case MESA_FORMAT_RGB9_E5_FLOAT:
+      return PIPE_FORMAT_R9G9B9E5_FLOAT;
+   case MESA_FORMAT_R11_G11_B10_FLOAT:
+      return PIPE_FORMAT_R11G11B10_FLOAT;
+
+   default:
+      assert(0);
+      return PIPE_FORMAT_NONE;
+   }
+}
+
+
+/**
+ * Translate Gallium format to Mesa format.
+ */
+gl_format
+st_pipe_format_to_mesa_format(enum pipe_format format)
+{
+   switch (format) {
+   case PIPE_FORMAT_A8B8G8R8_UNORM:
+      return MESA_FORMAT_RGBA8888;
+   case PIPE_FORMAT_R8G8B8A8_UNORM:
+      return MESA_FORMAT_RGBA8888_REV;
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+      return MESA_FORMAT_ARGB8888;
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+      return MESA_FORMAT_ARGB8888_REV;
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
+      return MESA_FORMAT_XRGB8888;
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+      return MESA_FORMAT_XRGB8888_REV;
+   case PIPE_FORMAT_B5G5R5A1_UNORM:
+      return MESA_FORMAT_ARGB1555;
+   case PIPE_FORMAT_B4G4R4A4_UNORM:
+      return MESA_FORMAT_ARGB4444;
+   case PIPE_FORMAT_B5G6R5_UNORM:
+      return MESA_FORMAT_RGB565;
+   case PIPE_FORMAT_B2G3R3_UNORM:
+      return MESA_FORMAT_RGB332;
+   case PIPE_FORMAT_B10G10R10A2_UNORM:
+      return MESA_FORMAT_ARGB2101010;
+   case PIPE_FORMAT_L4A4_UNORM:
+      return MESA_FORMAT_AL44;
+   case PIPE_FORMAT_L8A8_UNORM:
+      return MESA_FORMAT_AL88;
+   case PIPE_FORMAT_L16A16_UNORM:
+      return MESA_FORMAT_AL1616;
+   case PIPE_FORMAT_A8_UNORM:
+      return MESA_FORMAT_A8;
+   case PIPE_FORMAT_A16_UNORM:
+      return MESA_FORMAT_A16;
+   case PIPE_FORMAT_L8_UNORM:
+      return MESA_FORMAT_L8;
+   case PIPE_FORMAT_L16_UNORM:
+      return MESA_FORMAT_L16;
+   case PIPE_FORMAT_I8_UNORM:
+      return MESA_FORMAT_I8;
+   case PIPE_FORMAT_I16_UNORM:
+      return MESA_FORMAT_I16;
+   case PIPE_FORMAT_S8_USCALED:
+      return MESA_FORMAT_S8;
+
+   case PIPE_FORMAT_R16G16B16A16_UNORM:
+      return MESA_FORMAT_RGBA_16;
+
+   case PIPE_FORMAT_Z16_UNORM:
+      return MESA_FORMAT_Z16;
+   case PIPE_FORMAT_Z32_UNORM:
+      return MESA_FORMAT_Z32;
+   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+      return MESA_FORMAT_Z24_S8;
+   case PIPE_FORMAT_X8Z24_UNORM:
+      return MESA_FORMAT_Z24_X8;
+   case PIPE_FORMAT_Z24X8_UNORM:
+      return MESA_FORMAT_X8_Z24;
+   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+      return MESA_FORMAT_S8_Z24;
+
+   case PIPE_FORMAT_UYVY:
+      return MESA_FORMAT_YCBCR;
+   case PIPE_FORMAT_YUYV:
+      return MESA_FORMAT_YCBCR_REV;
+
+#if FEATURE_texture_s3tc
+   case PIPE_FORMAT_DXT1_RGB:
+      return MESA_FORMAT_RGB_DXT1;
+   case PIPE_FORMAT_DXT1_RGBA:
+      return MESA_FORMAT_RGBA_DXT1;
+   case PIPE_FORMAT_DXT3_RGBA:
+      return MESA_FORMAT_RGBA_DXT3;
+   case PIPE_FORMAT_DXT5_RGBA:
+      return MESA_FORMAT_RGBA_DXT5;
+#if FEATURE_EXT_texture_sRGB
+   case PIPE_FORMAT_DXT1_SRGB:
+      return MESA_FORMAT_SRGB_DXT1;
+   case PIPE_FORMAT_DXT1_SRGBA:
+      return MESA_FORMAT_SRGBA_DXT1;
+   case PIPE_FORMAT_DXT3_SRGBA:
+      return MESA_FORMAT_SRGBA_DXT3;
+   case PIPE_FORMAT_DXT5_SRGBA:
+      return MESA_FORMAT_SRGBA_DXT5;
+#endif
+#endif
+
+#if FEATURE_EXT_texture_sRGB
+   case PIPE_FORMAT_L8A8_SRGB:
+      return MESA_FORMAT_SLA8;
+   case PIPE_FORMAT_L8_SRGB:
+      return MESA_FORMAT_SL8;
+   case PIPE_FORMAT_R8G8B8_SRGB:
+      return MESA_FORMAT_SRGB8;
+   case PIPE_FORMAT_A8B8G8R8_SRGB:
+      return MESA_FORMAT_SRGBA8;
+   case PIPE_FORMAT_B8G8R8A8_SRGB:
+      return MESA_FORMAT_SARGB8;
+#endif
+   case PIPE_FORMAT_R32G32B32A32_FLOAT:
+      return MESA_FORMAT_RGBA_FLOAT32;
+   case PIPE_FORMAT_R16G16B16A16_FLOAT:
+      return MESA_FORMAT_RGBA_FLOAT16;
+   case PIPE_FORMAT_R32G32B32_FLOAT:
+      return MESA_FORMAT_RGB_FLOAT32;
+   case PIPE_FORMAT_R16G16B16_FLOAT:
+      return MESA_FORMAT_RGB_FLOAT16;
+   case PIPE_FORMAT_L32A32_FLOAT:
+      return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
+   case PIPE_FORMAT_L16A16_FLOAT:
+      return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
+   case PIPE_FORMAT_L32_FLOAT:
+      return MESA_FORMAT_LUMINANCE_FLOAT32;
+   case PIPE_FORMAT_L16_FLOAT:
+      return MESA_FORMAT_LUMINANCE_FLOAT16;
+   case PIPE_FORMAT_A32_FLOAT:
+      return MESA_FORMAT_ALPHA_FLOAT32;
+   case PIPE_FORMAT_A16_FLOAT:
+      return MESA_FORMAT_ALPHA_FLOAT16;
+   case PIPE_FORMAT_I32_FLOAT:
+      return MESA_FORMAT_INTENSITY_FLOAT32;
+   case PIPE_FORMAT_I16_FLOAT:
+      return MESA_FORMAT_INTENSITY_FLOAT16;
+   case PIPE_FORMAT_R32_FLOAT:
+      return MESA_FORMAT_R_FLOAT32;
+   case PIPE_FORMAT_R16_FLOAT:
+      return MESA_FORMAT_R_FLOAT16;
+   case PIPE_FORMAT_R32G32_FLOAT:
+      return MESA_FORMAT_RG_FLOAT32;
+   case PIPE_FORMAT_R16G16_FLOAT:
+      return MESA_FORMAT_RG_FLOAT16;
+
+   case PIPE_FORMAT_R8_UNORM:
+      return MESA_FORMAT_R8;
+   case PIPE_FORMAT_R16_UNORM:
+      return MESA_FORMAT_R16;
+   case PIPE_FORMAT_R8G8_UNORM:
+      return MESA_FORMAT_RG88;
+   case PIPE_FORMAT_R16G16_UNORM:
+      return MESA_FORMAT_RG1616;
+
+   /* signed int formats */
+   case PIPE_FORMAT_R8G8B8A8_SSCALED:
+      return MESA_FORMAT_RGBA_INT8;
+   case PIPE_FORMAT_R16G16B16A16_SSCALED:
+      return MESA_FORMAT_RGBA_INT16;
+   case PIPE_FORMAT_R32G32B32A32_SSCALED:
+      return MESA_FORMAT_RGBA_INT32;
+
+   /* unsigned int formats */
+   case PIPE_FORMAT_R8G8B8A8_USCALED:
+      return MESA_FORMAT_RGBA_UINT8;
+   case PIPE_FORMAT_R16G16B16A16_USCALED:
+      return MESA_FORMAT_RGBA_UINT16;
+   case PIPE_FORMAT_R32G32B32A32_USCALED:
+      return MESA_FORMAT_RGBA_UINT32;
+
+   case PIPE_FORMAT_RGTC1_UNORM:
+      return MESA_FORMAT_RED_RGTC1;
+   case PIPE_FORMAT_RGTC1_SNORM:
+      return MESA_FORMAT_SIGNED_RED_RGTC1;
+   case PIPE_FORMAT_RGTC2_UNORM:
+      return MESA_FORMAT_RG_RGTC2;
+   case PIPE_FORMAT_RGTC2_SNORM:
+      return MESA_FORMAT_SIGNED_RG_RGTC2;
+
+   case PIPE_FORMAT_LATC1_UNORM:
+      return MESA_FORMAT_L_LATC1;
+   case PIPE_FORMAT_LATC1_SNORM:
+      return MESA_FORMAT_SIGNED_L_LATC1;
+   case PIPE_FORMAT_LATC2_UNORM:
+      return MESA_FORMAT_LA_LATC2;
+   case PIPE_FORMAT_LATC2_SNORM:
+      return MESA_FORMAT_SIGNED_LA_LATC2;
+
+   /* signed normalized formats */
+   case PIPE_FORMAT_R8_SNORM:
+      return MESA_FORMAT_SIGNED_R8;
+   case PIPE_FORMAT_R8G8_SNORM:
+      return MESA_FORMAT_SIGNED_RG88_REV;
+   case PIPE_FORMAT_R8G8B8A8_SNORM:
+      return MESA_FORMAT_SIGNED_RGBA8888_REV;
+
+   case PIPE_FORMAT_A8_SNORM:
+      return MESA_FORMAT_SIGNED_A8;
+   case PIPE_FORMAT_L8_SNORM:
+      return MESA_FORMAT_SIGNED_L8;
+   case PIPE_FORMAT_L8A8_SNORM:
+      return MESA_FORMAT_SIGNED_AL88;
+   case PIPE_FORMAT_I8_SNORM:
+      return MESA_FORMAT_SIGNED_I8;
+
+   case PIPE_FORMAT_R16_SNORM:
+      return MESA_FORMAT_SIGNED_R16;
+   case PIPE_FORMAT_R16G16_SNORM:
+      return MESA_FORMAT_SIGNED_GR1616;
+   case PIPE_FORMAT_R16G16B16A16_SNORM:
+      return MESA_FORMAT_SIGNED_RGBA_16;
+
+   case PIPE_FORMAT_A16_SNORM:
+      return MESA_FORMAT_SIGNED_A16;
+   case PIPE_FORMAT_L16_SNORM:
+      return MESA_FORMAT_SIGNED_L16;
+   case PIPE_FORMAT_L16A16_SNORM:
+      return MESA_FORMAT_SIGNED_AL1616;
+   case PIPE_FORMAT_I16_SNORM:
+      return MESA_FORMAT_SIGNED_I16;
+
+   case PIPE_FORMAT_R9G9B9E5_FLOAT:
+      return MESA_FORMAT_RGB9_E5_FLOAT;
+   case PIPE_FORMAT_R11G11B10_FLOAT:
+      return MESA_FORMAT_R11_G11_B10_FLOAT;
+
+   default:
+      assert(0);
+      return MESA_FORMAT_NONE;
+   }
+}
+
+
+/**
+ * Map GL texture formats to Gallium pipe formats.
+ */
+struct format_mapping
+{
+   GLenum glFormats[18];       /**< list of GLenum formats, 0-terminated */
+   enum pipe_format pipeFormats[10]; /**< list of pipe formats, 0-terminated */
+};
+
+
+#define DEFAULT_RGBA_FORMATS \
+      PIPE_FORMAT_B8G8R8A8_UNORM, \
+      PIPE_FORMAT_A8R8G8B8_UNORM, \
+      PIPE_FORMAT_A8B8G8R8_UNORM, \
+      PIPE_FORMAT_B5G6R5_UNORM, \
+      0
+
+#define DEFAULT_RGB_FORMATS \
+      PIPE_FORMAT_B8G8R8X8_UNORM, \
+      PIPE_FORMAT_X8R8G8B8_UNORM, \
+      PIPE_FORMAT_X8B8G8R8_UNORM, \
+      PIPE_FORMAT_B8G8R8A8_UNORM, \
+      PIPE_FORMAT_A8R8G8B8_UNORM, \
+      PIPE_FORMAT_A8B8G8R8_UNORM, \
+      PIPE_FORMAT_B5G6R5_UNORM, \
+      0
+
+#define DEFAULT_SRGBA_FORMATS \
+      PIPE_FORMAT_B8G8R8A8_SRGB, \
+      PIPE_FORMAT_A8R8G8B8_SRGB, \
+      PIPE_FORMAT_A8B8G8R8_SRGB, \
+      0
+
+/**
+ * This table maps OpenGL texture format enums to Gallium pipe_format enums.
+ * Multiple GL enums might map to multiple pipe_formats.
+ * The first pipe format in the list that's supported is the one that's chosen.
+ */
+static struct format_mapping format_map[] = {
+   /* Basic RGB, RGBA formats */
+   {
+      { GL_RGB10, GL_RGB10_A2, 0 },
+      { PIPE_FORMAT_B10G10R10A2_UNORM, 0 }
+   },
+   {
+      { 4, GL_RGBA, GL_RGBA8, 0 },
+      { DEFAULT_RGBA_FORMATS, 0 }
+   },
+   {
+      { GL_BGRA, 0 },
+      { PIPE_FORMAT_B8G8R8A8_UNORM, DEFAULT_RGB_FORMATS, 0 }
+   },
+   {
+      { 3, GL_RGB, GL_RGB8, 0 },
+      { DEFAULT_RGB_FORMATS, 0 }
+   },
+   {
+      { GL_RGB12, GL_RGB16, GL_RGBA12, GL_RGBA16, 0 },
+      { PIPE_FORMAT_R16G16B16A16_UNORM, DEFAULT_RGB_FORMATS, 0 }
+   },
+   {
+      { GL_RGBA4, GL_RGBA2, 0 },
+      { PIPE_FORMAT_B4G4R4A4_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { GL_RGB5_A1, 0 },
+      { PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS, 0 }
+   },
+   {
+      { GL_R3_G3_B2, 0 },
+      { PIPE_FORMAT_B2G3R3_UNORM, PIPE_FORMAT_B5G6R5_UNORM,
+        PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { GL_RGB5, GL_RGB4 },
+      { PIPE_FORMAT_B5G6R5_UNORM, PIPE_FORMAT_B5G5R5A1_UNORM,
+        DEFAULT_RGBA_FORMATS }
+   },
+
+   /* basic Alpha formats */
+   {
+      { GL_ALPHA12, GL_ALPHA16, 0 },
+      { PIPE_FORMAT_A16_UNORM, PIPE_FORMAT_A8_UNORM,
+        DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { GL_ALPHA, GL_ALPHA4, GL_ALPHA8, GL_COMPRESSED_ALPHA, 0 },
+      { PIPE_FORMAT_A8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+
+   /* basic Luminance formats */
+   {
+      { GL_LUMINANCE12, GL_LUMINANCE16, 0 },
+      { PIPE_FORMAT_L16_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGBA_FORMATS, 0 }
+   },
+   {
+      { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
+      { PIPE_FORMAT_L8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+
+   /* basic Luminance/Alpha formats */
+   {
+      { GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
+        GL_LUMINANCE16_ALPHA16, 0},
+      { PIPE_FORMAT_L16A16_UNORM, PIPE_FORMAT_L8A8_UNORM,
+        PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { 2, GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8, 0 },
+      { PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { GL_LUMINANCE4_ALPHA4, 0 },
+      { PIPE_FORMAT_L4A4_UNORM, PIPE_FORMAT_L4A4_UNORM,
+        DEFAULT_RGBA_FORMATS }
+   },
+
+   /* basic Intensity formats */
+   {
+      { GL_INTENSITY12, GL_INTENSITY16, 0 },
+      { PIPE_FORMAT_I16_UNORM, PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+   {
+      { GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
+        GL_COMPRESSED_INTENSITY, 0 },
+      { PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
+   },
+
+   /* YCbCr */
+   {
+      { GL_YCBCR_MESA, 0 },
+      { PIPE_FORMAT_UYVY, PIPE_FORMAT_YUYV, 0 }
+   },
+
+   /* compressed formats */ /* XXX PIPE_BIND_SAMPLER_VIEW only */
+   {
+      { GL_COMPRESSED_RGB, 0 },
+      { PIPE_FORMAT_DXT1_RGB, 0 }
+   },
+   {
+      { GL_COMPRESSED_RGBA, 0 },
+      { PIPE_FORMAT_DXT5_RGBA, 0 }
+   },
+   {
+      { GL_RGB_S3TC, GL_RGB4_S3TC, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 0 },
+      { PIPE_FORMAT_DXT1_RGB, 0 }
+   },
+   {
+      { GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0 },
+      { PIPE_FORMAT_DXT1_RGBA, 0 }
+   },
+   {
+      { GL_RGBA_S3TC, GL_RGBA4_S3TC, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0 },
+      { PIPE_FORMAT_DXT3_RGBA, 0 }
+   },
+   {
+      { GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0 },
+      { PIPE_FORMAT_DXT5_RGBA, 0 }
+   },
+
+#if 0
+   {
+      { GL_COMPRESSED_RGB_FXT1_3DFX, 0 },
+      { PIPE_FORMAT_RGB_FXT1, 0 }
+   },
+   {
+      { GL_COMPRESSED_RGBA_FXT1_3DFX, 0 },
+      { PIPE_FORMAT_RGB_FXT1, 0 }
+   },
+#endif
+
+   /* Depth formats */
+   {
+      { GL_DEPTH_COMPONENT16, 0 },
+      { PIPE_FORMAT_Z16_UNORM, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
+        PIPE_FORMAT_S8_USCALED_Z24_UNORM, PIPE_FORMAT_Z32_UNORM, 0 }
+   },
+   {
+      { GL_DEPTH_COMPONENT24, 0 },
+      { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
+        PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
+        PIPE_FORMAT_Z32_UNORM, 0 }
+   },
+   {
+      { GL_DEPTH_COMPONENT32, 0 },
+      { PIPE_FORMAT_Z32_UNORM, 0 }
+   },
+   {
+      { GL_DEPTH_COMPONENT, 0 },
+      { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
+        PIPE_FORMAT_Z32_UNORM, PIPE_FORMAT_Z16_UNORM,
+        PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0 }
+   },
+
+   /* stencil formats */
+   {
+      { GL_STENCIL_INDEX, GL_STENCIL_INDEX1_EXT, GL_STENCIL_INDEX4_EXT,
+        GL_STENCIL_INDEX8_EXT, GL_STENCIL_INDEX16_EXT, 0 },
+      {
+         PIPE_FORMAT_S8_USCALED, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
+         PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0
+      }
+   },
+
+   /* Depth / Stencil formats */
+   {
+      { GL_DEPTH_STENCIL_EXT, GL_DEPTH24_STENCIL8_EXT, 0 },
+      { PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0 }
+   },
+
+   /* sRGB formats */
+   {
+      { GL_SRGB_EXT, GL_SRGB8_EXT, GL_SRGB_ALPHA_EXT, GL_SRGB8_ALPHA8_EXT, 0 },
+      { DEFAULT_SRGBA_FORMATS }
+   },
+   {
+      { GL_COMPRESSED_SRGB_EXT, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT, 0 },
+      { PIPE_FORMAT_DXT1_SRGB, DEFAULT_SRGBA_FORMATS }
+   },
+   {
+      { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 0 },
+      { PIPE_FORMAT_DXT1_SRGBA, 0 }
+   },
+   {
+      { GL_COMPRESSED_SRGB_ALPHA_EXT,
+        GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 0 },
+      { PIPE_FORMAT_DXT3_SRGBA, DEFAULT_SRGBA_FORMATS }
+   },
+   {
+      { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 0 },
+      { PIPE_FORMAT_DXT5_SRGBA, 0 }
+   },
+   {
+      { GL_SLUMINANCE_ALPHA_EXT, GL_SLUMINANCE8_ALPHA8_EXT,
+        GL_COMPRESSED_SLUMINANCE_EXT, GL_COMPRESSED_SLUMINANCE_ALPHA_EXT, 0 },
+      { PIPE_FORMAT_L8A8_SRGB, DEFAULT_SRGBA_FORMATS }
+   },
+   {
+      { GL_SLUMINANCE_EXT, GL_SLUMINANCE8_EXT, 0 },
+      { PIPE_FORMAT_L8_SRGB, DEFAULT_SRGBA_FORMATS }
+   },
+
+   /* 16-bit float formats */
+   {
+      { GL_RGBA16F_ARB, 0 },
+      { PIPE_FORMAT_R16G16B16A16_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_RGB16F_ARB, 0 },
+      { PIPE_FORMAT_R16G16B16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_LUMINANCE_ALPHA16F_ARB, 0 },
+      { PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_ALPHA16F_ARB, 0 },
+      { PIPE_FORMAT_A16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
+        PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_INTENSITY16F_ARB, 0 },
+      { PIPE_FORMAT_I16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
+        PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_LUMINANCE16F_ARB, 0 },
+      { PIPE_FORMAT_L16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
+        PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_R16F, 0 },
+      { PIPE_FORMAT_R16_FLOAT, PIPE_FORMAT_R16G16_FLOAT,
+        PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+   {
+      { GL_RG16F, 0 },
+      { PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
+        PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
+   },
+
+   /* 32-bit float formats */
+   {
+      { GL_RGBA32F_ARB, 0 },
+      { PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_RGB32F_ARB, 0 },
+      { PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
+        PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_LUMINANCE_ALPHA32F_ARB, 0 },
+      { PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
+        PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_ALPHA32F_ARB, 0 },
+      { PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
+        PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_A16_FLOAT,
+        PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_INTENSITY32F_ARB, 0 },
+      { PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
+        PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_I16_FLOAT,
+        PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_LUMINANCE32F_ARB, 0 },
+      { PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
+        PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_L16_FLOAT,
+        PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_R32F, 0 },
+      { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT,
+        PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16_FLOAT,
+        PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+   {
+      { GL_RG32F, 0 },
+      { PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
+        PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
+   },
+
+   /* R, RG formats */
+   {
+      { GL_RED, GL_R8, 0 },
+      { PIPE_FORMAT_R8_UNORM, 0 }
+   },
+   {
+      { GL_RG, GL_RG8, 0 },
+      { PIPE_FORMAT_R8G8_UNORM, 0 }
+   },
+   {
+      { GL_R16, 0 },
+      { PIPE_FORMAT_R16_UNORM, 0 }
+   },
+   {
+      { GL_RG16, 0 },
+      { PIPE_FORMAT_R16G16_UNORM, 0 }
+   },
+
+   /* compressed R, RG formats */
+   {
+      { GL_COMPRESSED_RED, GL_COMPRESSED_RED_RGTC1, 0 },
+      { PIPE_FORMAT_RGTC1_UNORM, PIPE_FORMAT_R8_UNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_SIGNED_RED_RGTC1, 0 },
+      { PIPE_FORMAT_RGTC1_SNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_RG, GL_COMPRESSED_RG_RGTC2, 0 },
+      { PIPE_FORMAT_RGTC2_UNORM, PIPE_FORMAT_R8G8_UNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_SIGNED_RG_RGTC2, 0 },
+      { PIPE_FORMAT_RGTC2_SNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_LUMINANCE, GL_COMPRESSED_LUMINANCE_LATC1_EXT, 0 },
+      { PIPE_FORMAT_LATC1_UNORM, PIPE_FORMAT_L8_UNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT, 0 },
+      { PIPE_FORMAT_LATC1_SNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_LUMINANCE_ALPHA, GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT,
+        GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI, 0 },
+      { PIPE_FORMAT_LATC2_UNORM, PIPE_FORMAT_L8A8_UNORM, 0 }
+   },
+   {
+      { GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT, 0 },
+      { PIPE_FORMAT_LATC2_SNORM, 0 }
+   },
+
+   /* signed/unsigned integer formats.
+    * XXX Mesa only has formats for RGBA signed/unsigned integer formats.
+    * If/when new formats are added this code should be updated.
+    */
+   {
+      { GL_RED_INTEGER_EXT,
+        GL_GREEN_INTEGER_EXT,
+        GL_BLUE_INTEGER_EXT,
+        GL_ALPHA_INTEGER_EXT,
+        GL_RGB_INTEGER_EXT,
+        GL_RGBA_INTEGER_EXT,
+        GL_BGR_INTEGER_EXT,
+        GL_BGRA_INTEGER_EXT,
+        GL_LUMINANCE_INTEGER_EXT,
+        GL_LUMINANCE_ALPHA_INTEGER_EXT,
+        GL_RGBA8I_EXT,
+        GL_RGB8I_EXT,
+        GL_ALPHA8I_EXT,
+        GL_INTENSITY8I_EXT,
+        GL_LUMINANCE8I_EXT,
+        GL_LUMINANCE_ALPHA8I_EXT, 0 },
+      { PIPE_FORMAT_R8G8B8A8_SSCALED, 0 }
+   },
+   {
+      {
+         GL_RGBA16I_EXT,
+         GL_RGB16I_EXT,
+         GL_ALPHA16I_EXT,
+         GL_INTENSITY16I_EXT,
+         GL_LUMINANCE16I_EXT,
+         GL_LUMINANCE_ALPHA16I_EXT, 0 },
+      { PIPE_FORMAT_R16G16B16A16_SSCALED, 0 },
+   },
+   {
+      {
+         GL_RGBA32I_EXT,
+         GL_RGB32I_EXT,
+         GL_ALPHA32I_EXT,
+         GL_INTENSITY32I_EXT,
+         GL_LUMINANCE32I_EXT,
+         GL_LUMINANCE_ALPHA32I_EXT, 0 },
+      { PIPE_FORMAT_R32G32B32A32_SSCALED, 0 }
+   },
+   {
+      {
+         GL_RGBA8UI_EXT,
+         GL_RGB8UI_EXT,
+         GL_ALPHA8UI_EXT,
+         GL_INTENSITY8UI_EXT,
+         GL_LUMINANCE8UI_EXT,
+         GL_LUMINANCE_ALPHA8UI_EXT, 0 },
+      { PIPE_FORMAT_R8G8B8A8_USCALED, 0 }
+   },
+   {
+      {
+         GL_RGBA16UI_EXT,
+         GL_RGB16UI_EXT,
+         GL_ALPHA16UI_EXT,
+         GL_INTENSITY16UI_EXT,
+         GL_LUMINANCE16UI_EXT,
+         GL_LUMINANCE_ALPHA16UI_EXT, 0 },
+      { PIPE_FORMAT_R16G16B16A16_USCALED, 0 }
+   },
+   {
+      {
+         GL_RGBA32UI_EXT,
+         GL_RGB32UI_EXT,
+         GL_ALPHA32UI_EXT,
+         GL_INTENSITY32UI_EXT,
+         GL_LUMINANCE32UI_EXT,
+         GL_LUMINANCE_ALPHA32UI_EXT, 0 },
+      { PIPE_FORMAT_R32G32B32A32_USCALED, 0 }
+   },
+
+   /* signed normalized formats */
+   {
+      { GL_RED_SNORM, GL_R8_SNORM, 0 },
+      { PIPE_FORMAT_R8_SNORM, PIPE_FORMAT_R8G8_SNORM,
+        PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_R16_SNORM, 0 },
+      { PIPE_FORMAT_R16_SNORM,
+        PIPE_FORMAT_R16G16_SNORM,
+        PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_R8_SNORM,
+        PIPE_FORMAT_R8G8_SNORM,
+        PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_RG_SNORM, GL_RG8_SNORM, 0 },
+      { PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_RG16_SNORM, 0 },
+      { PIPE_FORMAT_R16G16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_RGB_SNORM, GL_RGB8_SNORM, GL_RGBA_SNORM, GL_RGBA8_SNORM, 0 },
+      { PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_RGB16_SNORM, GL_RGBA16_SNORM, 0 },
+      { PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_ALPHA_SNORM, GL_ALPHA8_SNORM, 0 },
+      { PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_ALPHA16_SNORM, 0 },
+      { PIPE_FORMAT_A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_LUMINANCE_SNORM, GL_LUMINANCE8_SNORM, 0 },
+      { PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_LUMINANCE16_SNORM, 0 },
+      { PIPE_FORMAT_L16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_LUMINANCE_ALPHA_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, 0 },
+      { PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_LUMINANCE16_ALPHA16_SNORM, 0 },
+      { PIPE_FORMAT_L16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_INTENSITY_SNORM, GL_INTENSITY8_SNORM, 0 },
+      { PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   },
+   {
+      { GL_INTENSITY16_SNORM, 0 },
+      { PIPE_FORMAT_I16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
+        PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
+   }
+};
+
+
+/**
+ * Return first supported format from the given list.
+ */
+static enum pipe_format
+find_supported_format(struct pipe_screen *screen, 
+                      const enum pipe_format formats[],
+                      enum pipe_texture_target target,
+                      unsigned sample_count,
+                      unsigned tex_usage)
+{
+   uint i;
+   for (i = 0; formats[i]; i++) {
+      if (screen->is_format_supported(screen, formats[i], target,
+                                      sample_count, tex_usage)) {
+         return formats[i];
+      }
+   }
+   return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Given an OpenGL internalFormat value for a texture or surface, return
+ * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
+ * This is called during glTexImage2D, for example.
+ *
+ * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
+ * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
+ * we want render-to-texture ability.
+ *
+ * \param internalFormat  the user value passed to glTexImage2D
+ * \param target  one of PIPE_TEXTURE_x
+ * \param bindings  bitmask of PIPE_BIND_x flags.
+ */
+enum pipe_format
+st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
+                 enum pipe_texture_target target, unsigned sample_count,
+                 unsigned bindings)
+{
+   GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
+   int i, j;
+
+   /* can't render to compressed formats at this time */
+   if (_mesa_is_compressed_format(ctx, internalFormat)
+       && (bindings & ~PIPE_BIND_SAMPLER_VIEW)) {
+      return PIPE_FORMAT_NONE;
+   }
+
+   /* search table for internalFormat */
+   for (i = 0; i < Elements(format_map); i++) {
+      const struct format_mapping *mapping = &format_map[i];
+      for (j = 0; mapping->glFormats[j]; j++) {
+         if (mapping->glFormats[j] == internalFormat) {
+            /* Found the desired internal format.  Find first pipe format
+             * which is supported by the driver.
+             */
+            return find_supported_format(screen, mapping->pipeFormats,
+                                         target, sample_count, bindings);
+         }
+      }
+   }
+
+   _mesa_problem(NULL, "unhandled format!\n");
+   return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
+ */
+enum pipe_format
+st_choose_renderbuffer_format(struct pipe_screen *screen,
+                              GLenum internalFormat, unsigned sample_count)
+{
+   uint usage;
+   if (_mesa_is_depth_or_stencil_format(internalFormat))
+      usage = PIPE_BIND_DEPTH_STENCIL;
+   else
+      usage = PIPE_BIND_RENDER_TARGET;
+   return st_choose_format(screen, internalFormat, PIPE_TEXTURE_2D,
+                           sample_count, usage);
+}
+
+
+/**
+ * Called via ctx->Driver.chooseTextureFormat().
+ */
+gl_format
+st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,
+				  GLenum format, GLenum type, GLboolean renderable)
+{
+   struct pipe_screen *screen = st_context(ctx)->pipe->screen;
+   enum pipe_format pFormat;
+   uint bindings;
+
+   (void) format;
+   (void) type;
+
+   /* GL textures may wind up being render targets, but we don't know
+    * that in advance.  Specify potential render target flags now.
+    */
+   bindings = PIPE_BIND_SAMPLER_VIEW;
+   if (renderable == GL_TRUE) {
+      if (_mesa_is_depth_format(internalFormat) ||
+	  _mesa_is_depth_or_stencil_format(internalFormat))
+	 bindings |= PIPE_BIND_DEPTH_STENCIL;
+      else 
+	 bindings |= PIPE_BIND_RENDER_TARGET;
+   }
+
+   pFormat = st_choose_format(screen, internalFormat,
+                              PIPE_TEXTURE_2D, 0, bindings);
+
+   if (pFormat == PIPE_FORMAT_NONE) {
+      /* try choosing format again, this time without render target bindings */
+      pFormat = st_choose_format(screen, internalFormat,
+                                 PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
+   }
+
+   if (pFormat == PIPE_FORMAT_NONE) {
+      /* no luck at all */
+      return MESA_FORMAT_NONE;
+   }
+
+   return st_pipe_format_to_mesa_format(pFormat);
+}
+
+gl_format
+st_ChooseTextureFormat(struct gl_context *ctx, GLint internalFormat,
+                       GLenum format, GLenum type)
+{
+   boolean want_renderable =
+      internalFormat == 3 || internalFormat == 4 ||
+      internalFormat == GL_RGB || internalFormat == GL_RGBA ||
+      internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
+      internalFormat == GL_BGRA;
+
+   return st_ChooseTextureFormat_renderable(ctx, internalFormat,
+					    format, type, want_renderable);
+}
+
+/**
+ * Test if a gallium format is equivalent to a GL format/type.
+ */
+GLboolean
+st_equal_formats(enum pipe_format pFormat, GLenum format, GLenum type)
+{
+   switch (pFormat) {
+   case PIPE_FORMAT_A8B8G8R8_UNORM:
+      return format == GL_RGBA && type == GL_UNSIGNED_BYTE;
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+      return format == GL_BGRA && type == GL_UNSIGNED_BYTE;
+   case PIPE_FORMAT_B5G6R5_UNORM:
+      return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;
+   /* XXX more combos... */
+   default:
+      return GL_FALSE;
+   }
+}
+
+GLboolean
+st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
+{
+   if (format1 == format2)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
+       format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
+       format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
+       format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
+       format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
+       format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
+      return GL_TRUE;
+
+   if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
+       format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
+      return GL_TRUE;
+
+   return GL_FALSE;
+}
+
+
+
+/**
+ * This is used for translating texture border color and the clear
+ * color.  For example, the clear color is interpreted according to
+ * the renderbuffer's base format.  For example, if clearing a
+ * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =
+ * alpha.  Similarly for texture border colors.
+ */
+void
+st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,
+                   GLfloat colorOut[4])
+{
+   switch (baseFormat) {
+   case GL_RED:
+      colorOut[0] = colorIn[0];
+      colorOut[1] = 0.0F;
+      colorOut[2] = 0.0F;
+      colorOut[3] = 1.0F;
+      break;
+   case GL_RG:
+      colorOut[0] = colorIn[0];
+      colorOut[1] = colorIn[1];
+      colorOut[2] = 0.0F;
+      colorOut[3] = 1.0F;
+      break;
+   case GL_RGB:
+      colorOut[0] = colorIn[0];
+      colorOut[1] = colorIn[1];
+      colorOut[2] = colorIn[2];
+      colorOut[3] = 1.0F;
+      break;
+   case GL_ALPHA:
+      colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
+      colorOut[3] = colorIn[3];
+      break;
+   case GL_LUMINANCE:
+      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
+      colorOut[3] = 1.0;
+      break;
+   case GL_LUMINANCE_ALPHA:
+      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
+      colorOut[3] = colorIn[3];
+      break;
+   case GL_INTENSITY:
+      colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
+      break;
+   default:
+      COPY_4V(colorOut, colorIn);
+   }
+}