xserver and mesa git update 28-12-2010

1 files changed, 468 insertions, 435 deletions

diff --git a/mesalib/src/mesa/main/texformat.c b/mesalib/src/mesa/main/texformat.c
index b9271ef58..7b0b17b25 100644
--- a/mesalib/src/mesa/main/texformat.c
+++ b/mesalib/src/mesa/main/texformat.c
@@ -1,435 +1,468 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.7
- *
- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (c) 2008-2009 VMware, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \file texformat.c
- * Texture formats.
- *
- * \author Gareth Hughes
- * \author Brian Paul
- */
-
-
-#include "context.h"
-#include "texcompress.h"
-#include "texformat.h"
-
-
-/**
- * Choose an appropriate texture format given the format, type and
- * internalFormat parameters passed to glTexImage().
- *
- * \param ctx  the GL context.
- * \param internalFormat  user's prefered internal texture format.
- * \param format  incoming image pixel format.
- * \param type  incoming image data type.
- *
- * \return a pointer to a gl_texture_format object which describes the
- * choosen texture format, or NULL on failure.
- * 
- * This is called via dd_function_table::ChooseTextureFormat.  Hardware drivers
- * will typically override this function with a specialized version.
- */
-gl_format
-_mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
-                         GLenum format, GLenum type )
-{
-   (void) format;
-   (void) type;
-
-   switch (internalFormat) {
-      /* shallow RGBA formats */
-      case 4:
-      case GL_RGBA:
-      case GL_RGBA8:
-         return MESA_FORMAT_RGBA8888;
-      case GL_RGB5_A1:
-         return MESA_FORMAT_ARGB1555;
-      case GL_RGBA2:
-         return MESA_FORMAT_ARGB4444_REV; /* just to test another format*/
-      case GL_RGBA4:
-         return MESA_FORMAT_ARGB4444;
-
-      /* deep RGBA formats */
-      case GL_RGB10_A2:
-      case GL_RGBA12:
-      case GL_RGBA16:
-         return MESA_FORMAT_RGBA_16;
-
-      /* shallow RGB formats */
-      case 3:
-      case GL_RGB:
-      case GL_RGB8:
-         return MESA_FORMAT_RGB888;
-      case GL_R3_G3_B2:
-         return MESA_FORMAT_RGB332;
-      case GL_RGB4:
-         return MESA_FORMAT_RGB565_REV; /* just to test another format */
-      case GL_RGB5:
-         return MESA_FORMAT_RGB565;
-
-      /* deep RGB formats */
-      case GL_RGB10:
-      case GL_RGB12:
-      case GL_RGB16:
-         return MESA_FORMAT_RGBA_16;
-
-      /* Alpha formats */
-      case GL_ALPHA:
-      case GL_ALPHA4:
-      case GL_ALPHA12:
-      case GL_ALPHA16:
-      case GL_ALPHA8:
-         return MESA_FORMAT_A8;
-
-      /* Luminance formats */
-      case 1:
-      case GL_LUMINANCE:
-      case GL_LUMINANCE4:
-      case GL_LUMINANCE12:
-      case GL_LUMINANCE16:
-      case GL_LUMINANCE8:
-         return MESA_FORMAT_L8;
-
-      /* Luminance/Alpha formats */
-      case 2:
-      case GL_LUMINANCE_ALPHA:
-      case GL_LUMINANCE4_ALPHA4:
-      case GL_LUMINANCE6_ALPHA2:
-      case GL_LUMINANCE8_ALPHA8:
-         return MESA_FORMAT_AL88;
-
-      case GL_LUMINANCE12_ALPHA4:
-      case GL_LUMINANCE12_ALPHA12:
-      case GL_LUMINANCE16_ALPHA16:
-         return MESA_FORMAT_AL1616;
-
-      case GL_INTENSITY:
-      case GL_INTENSITY4:
-      case GL_INTENSITY12:
-      case GL_INTENSITY16:
-      case GL_INTENSITY8:
-         return MESA_FORMAT_I8;
-
-      case GL_COLOR_INDEX:
-      case GL_COLOR_INDEX1_EXT:
-      case GL_COLOR_INDEX2_EXT:
-      case GL_COLOR_INDEX4_EXT:
-      case GL_COLOR_INDEX12_EXT:
-      case GL_COLOR_INDEX16_EXT:
-      case GL_COLOR_INDEX8_EXT:
-         return MESA_FORMAT_CI8;
-
-      default:
-         ; /* fallthrough */
-   }
-
-   if (ctx->Extensions.ARB_depth_texture) {
-      switch (internalFormat) {
-         case GL_DEPTH_COMPONENT:
-         case GL_DEPTH_COMPONENT24:
-         case GL_DEPTH_COMPONENT32:
-            return MESA_FORMAT_Z32;
-         case GL_DEPTH_COMPONENT16:
-            return MESA_FORMAT_Z16;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   switch (internalFormat) {
-      case GL_COMPRESSED_ALPHA_ARB:
-         return MESA_FORMAT_A8;
-      case GL_COMPRESSED_LUMINANCE_ARB:
-         return MESA_FORMAT_L8;
-      case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
-         return MESA_FORMAT_AL88;
-      case GL_COMPRESSED_INTENSITY_ARB:
-         return MESA_FORMAT_I8;
-      case GL_COMPRESSED_RGB_ARB:
-         if (ctx->Extensions.EXT_texture_compression_s3tc ||
-             ctx->Extensions.S3_s3tc)
-            return MESA_FORMAT_RGB_DXT1;
-         if (ctx->Extensions.TDFX_texture_compression_FXT1)
-            return MESA_FORMAT_RGB_FXT1;
-         return MESA_FORMAT_RGB888;
-      case GL_COMPRESSED_RGBA_ARB:
-         if (ctx->Extensions.EXT_texture_compression_s3tc ||
-             ctx->Extensions.S3_s3tc)
-            return MESA_FORMAT_RGBA_DXT3; /* Not rgba_dxt1, see spec */
-         if (ctx->Extensions.TDFX_texture_compression_FXT1)
-            return MESA_FORMAT_RGBA_FXT1;
-         return MESA_FORMAT_RGBA8888;
-      default:
-         ; /* fallthrough */
-   }
-
-   if (ctx->Extensions.MESA_ycbcr_texture) {
-      if (internalFormat == GL_YCBCR_MESA) {
-         if (type == GL_UNSIGNED_SHORT_8_8_MESA)
-            return MESA_FORMAT_YCBCR;
-         else
-            return MESA_FORMAT_YCBCR_REV;
-      }
-   }
-
-#if FEATURE_texture_fxt1
-   if (ctx->Extensions.TDFX_texture_compression_FXT1) {
-      switch (internalFormat) {
-         case GL_COMPRESSED_RGB_FXT1_3DFX:
-            return MESA_FORMAT_RGB_FXT1;
-         case GL_COMPRESSED_RGBA_FXT1_3DFX:
-            return MESA_FORMAT_RGBA_FXT1;
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif
-
-#if FEATURE_texture_s3tc
-   if (ctx->Extensions.EXT_texture_compression_s3tc) {
-      switch (internalFormat) {
-         case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-            return MESA_FORMAT_RGB_DXT1;
-         case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-            return MESA_FORMAT_RGBA_DXT1;
-         case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-            return MESA_FORMAT_RGBA_DXT3;
-         case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-            return MESA_FORMAT_RGBA_DXT5;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.S3_s3tc) {
-      switch (internalFormat) {
-         case GL_RGB_S3TC:
-         case GL_RGB4_S3TC:
-            return MESA_FORMAT_RGB_DXT1;
-         case GL_RGBA_S3TC:
-         case GL_RGBA4_S3TC:
-            return MESA_FORMAT_RGBA_DXT3;
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif
-
-   if (ctx->Extensions.ARB_texture_float) {
-      switch (internalFormat) {
-         case GL_ALPHA16F_ARB:
-            return MESA_FORMAT_ALPHA_FLOAT16;
-         case GL_ALPHA32F_ARB:
-            return MESA_FORMAT_ALPHA_FLOAT32;
-         case GL_LUMINANCE16F_ARB:
-            return MESA_FORMAT_LUMINANCE_FLOAT16;
-         case GL_LUMINANCE32F_ARB:
-            return MESA_FORMAT_LUMINANCE_FLOAT32;
-         case GL_LUMINANCE_ALPHA16F_ARB:
-            return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
-         case GL_LUMINANCE_ALPHA32F_ARB:
-            return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
-         case GL_INTENSITY16F_ARB:
-            return MESA_FORMAT_INTENSITY_FLOAT16;
-         case GL_INTENSITY32F_ARB:
-            return MESA_FORMAT_INTENSITY_FLOAT32;
-         case GL_RGB16F_ARB:
-            return MESA_FORMAT_RGB_FLOAT16;
-         case GL_RGB32F_ARB:
-            return MESA_FORMAT_RGB_FLOAT32;
-         case GL_RGBA16F_ARB:
-            return MESA_FORMAT_RGBA_FLOAT16;
-         case GL_RGBA32F_ARB:
-            return MESA_FORMAT_RGBA_FLOAT32;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.EXT_packed_depth_stencil) {
-      switch (internalFormat) {
-         case GL_DEPTH_STENCIL_EXT:
-         case GL_DEPTH24_STENCIL8_EXT:
-            return MESA_FORMAT_Z24_S8;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.ATI_envmap_bumpmap) {
-      switch (internalFormat) {
-         case GL_DUDV_ATI:
-         case GL_DU8DV8_ATI:
-            return MESA_FORMAT_DUDV8;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->Extensions.MESA_texture_signed_rgba) {
-      switch (internalFormat) {
-         case GL_RGBA_SNORM:
-         case GL_RGBA8_SNORM:
-            return MESA_FORMAT_SIGNED_RGBA8888;
-         default:
-            ; /* fallthrough */
-      }
-   }
-
-   if (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) {
-      switch (internalFormat) {
-         case GL_RED_SNORM:
-         case GL_R8_SNORM:
-            return MESA_FORMAT_SIGNED_R8;
-         case GL_RG_SNORM:
-         case GL_RG8_SNORM:
-            return MESA_FORMAT_SIGNED_RG88;
-         case GL_RGB_SNORM:
-         case GL_RGB8_SNORM:
-            return MESA_FORMAT_SIGNED_RGBX8888;
-         case GL_RGBA_SNORM:
-         case GL_RGBA8_SNORM:
-            return MESA_FORMAT_SIGNED_RGBA8888;
-         case GL_R16_SNORM:
-            return MESA_FORMAT_SIGNED_R_16;
-         case GL_RG16_SNORM:
-            return MESA_FORMAT_SIGNED_RG_16;
-         case GL_RGB16_SNORM:
-            return MESA_FORMAT_SIGNED_RGB_16;
-         case GL_RGBA16_SNORM:
-            return MESA_FORMAT_SIGNED_RGBA_16;
-         default:
-            ; /* fall-through */
-      }
-   }
-
-#if FEATURE_EXT_texture_sRGB
-   if (ctx->Extensions.EXT_texture_sRGB) {
-      switch (internalFormat) {
-         case GL_SRGB_EXT:
-         case GL_SRGB8_EXT:
-            return MESA_FORMAT_SRGB8;
-         case GL_SRGB_ALPHA_EXT:
-         case GL_SRGB8_ALPHA8_EXT:
-            return MESA_FORMAT_SRGBA8;
-         case GL_SLUMINANCE_EXT:
-         case GL_SLUMINANCE8_EXT:
-            return MESA_FORMAT_SL8;
-         case GL_SLUMINANCE_ALPHA_EXT:
-         case GL_SLUMINANCE8_ALPHA8_EXT:
-            return MESA_FORMAT_SLA8;
-         case GL_COMPRESSED_SLUMINANCE_EXT:
-            return MESA_FORMAT_SL8;
-         case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
-            return MESA_FORMAT_SLA8;
-         case GL_COMPRESSED_SRGB_EXT:
-#if FEATURE_texture_s3tc
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGB_DXT1;
-#endif
-            return MESA_FORMAT_SRGB8;
-         case GL_COMPRESSED_SRGB_ALPHA_EXT:
-#if FEATURE_texture_s3tc
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGBA_DXT3; /* Not srgba_dxt1, see spec */
-#endif
-            return MESA_FORMAT_SRGBA8;
-#if FEATURE_texture_s3tc
-         case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGB_DXT1;
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGBA_DXT1;
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGBA_DXT3;
-            break;
-         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
-            if (ctx->Extensions.EXT_texture_compression_s3tc)
-               return MESA_FORMAT_SRGBA_DXT5;
-            break;
-#endif
-         default:
-            ; /* fallthrough */
-      }
-   }
-#endif /* FEATURE_EXT_texture_sRGB */
-
-   if (ctx->Extensions.EXT_texture_integer) {
-      switch (internalFormat) {
-      case GL_RGBA32UI_EXT:
-      case GL_RGB32UI_EXT:
-      case GL_ALPHA32UI_EXT:
-      case GL_INTENSITY32UI_EXT:
-      case GL_LUMINANCE32UI_EXT:
-      case GL_LUMINANCE_ALPHA32UI_EXT:
-         return MESA_FORMAT_RGBA_UINT32;
-      case GL_RGBA16UI_EXT:
-      case GL_RGB16UI_EXT:
-      case GL_ALPHA16UI_EXT:
-      case GL_INTENSITY16UI_EXT:
-      case GL_LUMINANCE16UI_EXT:
-      case GL_LUMINANCE_ALPHA16UI_EXT:
-         return MESA_FORMAT_RGBA_UINT16;
-      case GL_RGBA8UI_EXT:
-      case GL_RGB8UI_EXT:
-      case GL_ALPHA8UI_EXT:
-      case GL_INTENSITY8UI_EXT:
-      case GL_LUMINANCE8UI_EXT:
-      case GL_LUMINANCE_ALPHA8UI_EXT:
-         return MESA_FORMAT_RGBA_UINT8;
-      case GL_RGBA32I_EXT:
-      case GL_RGB32I_EXT:
-      case GL_ALPHA32I_EXT:
-      case GL_INTENSITY32I_EXT:
-      case GL_LUMINANCE32I_EXT:
-      case GL_LUMINANCE_ALPHA32I_EXT:
-         return MESA_FORMAT_RGBA_INT32;
-      case GL_RGBA16I_EXT:
-      case GL_RGB16I_EXT:
-      case GL_ALPHA16I_EXT:
-      case GL_INTENSITY16I_EXT:
-      case GL_LUMINANCE16I_EXT:
-      case GL_LUMINANCE_ALPHA16I_EXT:
-         return MESA_FORMAT_RGBA_INT16;
-      case GL_RGBA8I_EXT:
-      case GL_RGB8I_EXT:
-      case GL_ALPHA8I_EXT:
-      case GL_INTENSITY8I_EXT:
-      case GL_LUMINANCE8I_EXT:
-      case GL_LUMINANCE_ALPHA8I_EXT:
-         return MESA_FORMAT_RGBA_INT8;
-      }
-   }
-
-   _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
-   return MESA_FORMAT_NONE;
-}
-
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.7

+ *

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

+ * Copyright (c) 2008-2009 VMware, Inc.

+ *

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

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

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

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

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

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

+ *

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

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

+ *

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

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

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

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

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

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

+ */

+

+

+/**

+ * \file texformat.c

+ * Texture formats.

+ *

+ * \author Gareth Hughes

+ * \author Brian Paul

+ */

+

+

+#include "context.h"

+#include "texcompress.h"

+#include "texformat.h"

+

+

+/**

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

+ * internalFormat parameters passed to glTexImage().

+ *

+ * \param ctx  the GL context.

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

+ * \param format  incoming image pixel format.

+ * \param type  incoming image data type.

+ *

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

+ * choosen texture format, or NULL on failure.

+ * 

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

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

+ */

+gl_format

+_mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,

+                         GLenum format, GLenum type )

+{

+   (void) format;

+   (void) type;

+

+   switch (internalFormat) {

+      /* shallow RGBA formats */

+      case 4:

+      case GL_RGBA:

+      case GL_RGBA8:

+         return MESA_FORMAT_RGBA8888;

+      case GL_RGB5_A1:

+         return MESA_FORMAT_ARGB1555;

+      case GL_RGBA2:

+         return MESA_FORMAT_ARGB4444_REV; /* just to test another format*/

+      case GL_RGBA4:

+         return MESA_FORMAT_ARGB4444;

+

+      /* deep RGBA formats */

+      case GL_RGB10_A2:

+         return MESA_FORMAT_ARGB2101010;

+

+      case GL_RGBA12:

+      case GL_RGBA16:

+         return MESA_FORMAT_RGBA_16;

+

+      /* shallow RGB formats */

+      case 3:

+      case GL_RGB:

+      case GL_RGB8:

+         return MESA_FORMAT_RGB888;

+      case GL_R3_G3_B2:

+         return MESA_FORMAT_RGB332;

+      case GL_RGB4:

+         return MESA_FORMAT_RGB565_REV; /* just to test another format */

+      case GL_RGB5:

+         return MESA_FORMAT_RGB565;

+

+      /* deep RGB formats */

+      case GL_RGB10:

+      case GL_RGB12:

+      case GL_RGB16:

+         return MESA_FORMAT_RGBA_16;

+

+      /* Alpha formats */

+      case GL_ALPHA:

+      case GL_ALPHA4:

+      case GL_ALPHA8:

+         return MESA_FORMAT_A8;

+

+      case GL_ALPHA12:

+      case GL_ALPHA16:

+         return MESA_FORMAT_A16;

+

+      /* Luminance formats */

+      case 1:

+      case GL_LUMINANCE:

+      case GL_LUMINANCE4:

+      case GL_LUMINANCE8:

+         return MESA_FORMAT_L8;

+

+      case GL_LUMINANCE12:

+      case GL_LUMINANCE16:

+         return MESA_FORMAT_L16;

+

+      /* Luminance/Alpha formats */

+      case GL_LUMINANCE4_ALPHA4:

+         return MESA_FORMAT_AL44;

+

+      case 2:

+      case GL_LUMINANCE_ALPHA:

+      case GL_LUMINANCE6_ALPHA2:

+      case GL_LUMINANCE8_ALPHA8:

+         return MESA_FORMAT_AL88;

+

+      case GL_LUMINANCE12_ALPHA4:

+      case GL_LUMINANCE12_ALPHA12:

+      case GL_LUMINANCE16_ALPHA16:

+         return MESA_FORMAT_AL1616;

+

+      case GL_INTENSITY:

+      case GL_INTENSITY4:

+      case GL_INTENSITY8:

+         return MESA_FORMAT_I8;

+

+      case GL_INTENSITY12:

+      case GL_INTENSITY16:

+         return MESA_FORMAT_I16;

+

+      case GL_COLOR_INDEX:

+      case GL_COLOR_INDEX1_EXT:

+      case GL_COLOR_INDEX2_EXT:

+      case GL_COLOR_INDEX4_EXT:

+      case GL_COLOR_INDEX12_EXT:

+      case GL_COLOR_INDEX16_EXT:

+      case GL_COLOR_INDEX8_EXT:

+         return MESA_FORMAT_CI8;

+

+      default:

+         ; /* fallthrough */

+   }

+

+   if (ctx->Extensions.ARB_depth_texture) {

+      switch (internalFormat) {

+         case GL_DEPTH_COMPONENT:

+         case GL_DEPTH_COMPONENT24:

+         case GL_DEPTH_COMPONENT32:

+            return MESA_FORMAT_Z32;

+         case GL_DEPTH_COMPONENT16:

+            return MESA_FORMAT_Z16;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   switch (internalFormat) {

+      case GL_COMPRESSED_ALPHA_ARB:

+         return MESA_FORMAT_A8;

+      case GL_COMPRESSED_LUMINANCE_ARB:

+         return MESA_FORMAT_L8;

+      case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:

+         return MESA_FORMAT_AL88;

+      case GL_COMPRESSED_INTENSITY_ARB:

+         return MESA_FORMAT_I8;

+      case GL_COMPRESSED_RGB_ARB:

+         if (ctx->Extensions.EXT_texture_compression_s3tc ||

+             ctx->Extensions.S3_s3tc)

+            return MESA_FORMAT_RGB_DXT1;

+         if (ctx->Extensions.TDFX_texture_compression_FXT1)

+            return MESA_FORMAT_RGB_FXT1;

+         return MESA_FORMAT_RGB888;

+      case GL_COMPRESSED_RGBA_ARB:

+         if (ctx->Extensions.EXT_texture_compression_s3tc ||

+             ctx->Extensions.S3_s3tc)

+            return MESA_FORMAT_RGBA_DXT3; /* Not rgba_dxt1, see spec */

+         if (ctx->Extensions.TDFX_texture_compression_FXT1)

+            return MESA_FORMAT_RGBA_FXT1;

+         return MESA_FORMAT_RGBA8888;

+      default:

+         ; /* fallthrough */

+   }

+

+   if (ctx->Extensions.MESA_ycbcr_texture) {

+      if (internalFormat == GL_YCBCR_MESA) {

+         if (type == GL_UNSIGNED_SHORT_8_8_MESA)

+            return MESA_FORMAT_YCBCR;

+         else

+            return MESA_FORMAT_YCBCR_REV;

+      }

+   }

+

+#if FEATURE_texture_fxt1

+   if (ctx->Extensions.TDFX_texture_compression_FXT1) {

+      switch (internalFormat) {

+         case GL_COMPRESSED_RGB_FXT1_3DFX:

+            return MESA_FORMAT_RGB_FXT1;

+         case GL_COMPRESSED_RGBA_FXT1_3DFX:

+            return MESA_FORMAT_RGBA_FXT1;

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif

+

+#if FEATURE_texture_s3tc

+   if (ctx->Extensions.EXT_texture_compression_s3tc) {

+      switch (internalFormat) {

+         case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

+            return MESA_FORMAT_RGB_DXT1;

+         case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

+            return MESA_FORMAT_RGBA_DXT1;

+         case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

+            return MESA_FORMAT_RGBA_DXT3;

+         case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

+            return MESA_FORMAT_RGBA_DXT5;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.S3_s3tc) {

+      switch (internalFormat) {

+         case GL_RGB_S3TC:

+         case GL_RGB4_S3TC:

+            return MESA_FORMAT_RGB_DXT1;

+         case GL_RGBA_S3TC:

+         case GL_RGBA4_S3TC:

+            return MESA_FORMAT_RGBA_DXT3;

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif

+

+   if (ctx->Extensions.ARB_texture_float) {

+      switch (internalFormat) {

+         case GL_ALPHA16F_ARB:

+            return MESA_FORMAT_ALPHA_FLOAT16;

+         case GL_ALPHA32F_ARB:

+            return MESA_FORMAT_ALPHA_FLOAT32;

+         case GL_LUMINANCE16F_ARB:

+            return MESA_FORMAT_LUMINANCE_FLOAT16;

+         case GL_LUMINANCE32F_ARB:

+            return MESA_FORMAT_LUMINANCE_FLOAT32;

+         case GL_LUMINANCE_ALPHA16F_ARB:

+            return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;

+         case GL_LUMINANCE_ALPHA32F_ARB:

+            return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;

+         case GL_INTENSITY16F_ARB:

+            return MESA_FORMAT_INTENSITY_FLOAT16;

+         case GL_INTENSITY32F_ARB:

+            return MESA_FORMAT_INTENSITY_FLOAT32;

+         case GL_RGB16F_ARB:

+            return MESA_FORMAT_RGB_FLOAT16;

+         case GL_RGB32F_ARB:

+            return MESA_FORMAT_RGB_FLOAT32;

+         case GL_RGBA16F_ARB:

+            return MESA_FORMAT_RGBA_FLOAT16;

+         case GL_RGBA32F_ARB:

+            return MESA_FORMAT_RGBA_FLOAT32;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.EXT_packed_depth_stencil) {

+      switch (internalFormat) {

+         case GL_DEPTH_STENCIL_EXT:

+         case GL_DEPTH24_STENCIL8_EXT:

+            return MESA_FORMAT_Z24_S8;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.ATI_envmap_bumpmap) {

+      switch (internalFormat) {

+         case GL_DUDV_ATI:

+         case GL_DU8DV8_ATI:

+            return MESA_FORMAT_DUDV8;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

+   if (ctx->Extensions.MESA_texture_signed_rgba) {

+      switch (internalFormat) {

+         case GL_RGBA_SNORM:

+         case GL_RGBA8_SNORM:

+            return MESA_FORMAT_SIGNED_RGBA8888;

+         default:

+            ; /* fallthrough */

+      }

+   }

+

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

+      switch (internalFormat) {

+         case GL_RED_SNORM:

+         case GL_R8_SNORM:

+            return MESA_FORMAT_SIGNED_R8;

+         case GL_RG_SNORM:

+         case GL_RG8_SNORM:

+            return MESA_FORMAT_SIGNED_RG88;

+         case GL_RGB_SNORM:

+         case GL_RGB8_SNORM:

+            return MESA_FORMAT_SIGNED_RGBX8888;

+         case GL_RGBA_SNORM:

+         case GL_RGBA8_SNORM:

+            return MESA_FORMAT_SIGNED_RGBA8888;

+         case GL_R16_SNORM:

+            return MESA_FORMAT_SIGNED_R_16;

+         case GL_RG16_SNORM:

+            return MESA_FORMAT_SIGNED_RG_16;

+         case GL_RGB16_SNORM:

+            return MESA_FORMAT_SIGNED_RGB_16;

+         case GL_RGBA16_SNORM:

+            return MESA_FORMAT_SIGNED_RGBA_16;

+         default:

+            ; /* fall-through */

+      }

+   }

+

+#if FEATURE_EXT_texture_sRGB

+   if (ctx->Extensions.EXT_texture_sRGB) {

+      switch (internalFormat) {

+         case GL_SRGB_EXT:

+         case GL_SRGB8_EXT:

+            return MESA_FORMAT_SRGB8;

+         case GL_SRGB_ALPHA_EXT:

+         case GL_SRGB8_ALPHA8_EXT:

+            return MESA_FORMAT_SRGBA8;

+         case GL_SLUMINANCE_EXT:

+         case GL_SLUMINANCE8_EXT:

+            return MESA_FORMAT_SL8;

+         case GL_SLUMINANCE_ALPHA_EXT:

+         case GL_SLUMINANCE8_ALPHA8_EXT:

+            return MESA_FORMAT_SLA8;

+         case GL_COMPRESSED_SLUMINANCE_EXT:

+            return MESA_FORMAT_SL8;

+         case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:

+            return MESA_FORMAT_SLA8;

+         case GL_COMPRESSED_SRGB_EXT:

+#if FEATURE_texture_s3tc

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGB_DXT1;

+#endif

+            return MESA_FORMAT_SRGB8;

+         case GL_COMPRESSED_SRGB_ALPHA_EXT:

+#if FEATURE_texture_s3tc

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGBA_DXT3; /* Not srgba_dxt1, see spec */

+#endif

+            return MESA_FORMAT_SRGBA8;

+#if FEATURE_texture_s3tc

+         case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGB_DXT1;

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGBA_DXT1;

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGBA_DXT3;

+            break;

+         case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

+            if (ctx->Extensions.EXT_texture_compression_s3tc)

+               return MESA_FORMAT_SRGBA_DXT5;

+            break;

+#endif

+         default:

+            ; /* fallthrough */

+      }

+   }

+#endif /* FEATURE_EXT_texture_sRGB */

+

+   if (ctx->Extensions.EXT_texture_integer) {

+      switch (internalFormat) {

+      case GL_RGBA32UI_EXT:

+      case GL_RGB32UI_EXT:

+      case GL_ALPHA32UI_EXT:

+      case GL_INTENSITY32UI_EXT:

+      case GL_LUMINANCE32UI_EXT:

+      case GL_LUMINANCE_ALPHA32UI_EXT:

+         return MESA_FORMAT_RGBA_UINT32;

+      case GL_RGBA16UI_EXT:

+      case GL_RGB16UI_EXT:

+      case GL_ALPHA16UI_EXT:

+      case GL_INTENSITY16UI_EXT:

+      case GL_LUMINANCE16UI_EXT:

+      case GL_LUMINANCE_ALPHA16UI_EXT:

+         return MESA_FORMAT_RGBA_UINT16;

+      case GL_RGBA8UI_EXT:

+      case GL_RGB8UI_EXT:

+      case GL_ALPHA8UI_EXT:

+      case GL_INTENSITY8UI_EXT:

+      case GL_LUMINANCE8UI_EXT:

+      case GL_LUMINANCE_ALPHA8UI_EXT:

+         return MESA_FORMAT_RGBA_UINT8;

+      case GL_RGBA32I_EXT:

+      case GL_RGB32I_EXT:

+      case GL_ALPHA32I_EXT:

+      case GL_INTENSITY32I_EXT:

+      case GL_LUMINANCE32I_EXT:

+      case GL_LUMINANCE_ALPHA32I_EXT:

+         return MESA_FORMAT_RGBA_INT32;

+      case GL_RGBA16I_EXT:

+      case GL_RGB16I_EXT:

+      case GL_ALPHA16I_EXT:

+      case GL_INTENSITY16I_EXT:

+      case GL_LUMINANCE16I_EXT:

+      case GL_LUMINANCE_ALPHA16I_EXT:

+         return MESA_FORMAT_RGBA_INT16;

+      case GL_RGBA8I_EXT:

+      case GL_RGB8I_EXT:

+      case GL_ALPHA8I_EXT:

+      case GL_INTENSITY8I_EXT:

+      case GL_LUMINANCE8I_EXT:

+      case GL_LUMINANCE_ALPHA8I_EXT:

+         return MESA_FORMAT_RGBA_INT8;

+      }

+   }

+

+   if (ctx->Extensions.ARB_texture_rg) {

+      switch (internalFormat) {

+      case GL_R8:

+      case GL_RED:

+      case GL_COMPRESSED_RED:

+	 return MESA_FORMAT_R8;

+

+      case GL_R16:

+         return MESA_FORMAT_R16;

+

+      case GL_RG:

+      case GL_RG8:

+      case GL_COMPRESSED_RG:

+	 return MESA_FORMAT_RG88;

+

+      case GL_RG16:

+	 return MESA_FORMAT_RG1616;

+

+      default:

+         ; /* fallthrough */

+      }

+   }

+

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

+   return MESA_FORMAT_NONE;

+}

+