X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Ftexcompress.c;h=c1b8c7675a27be612bf0d81451381efa68807941;hb=9b70c33e735ff060ddad7d0b501d19c670f41618;hp=d18b1d0b418fc6afba44813eb3c6a7c5e2c18538;hpb=a0c85249244e1af8dac88076d5f384cf4bd01236;p=mesa.git

diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c
index d18b1d0b418..c1b8c7675a2 100644
--- a/src/mesa/main/texcompress.c
+++ b/src/mesa/main/texcompress.c
@@ -1,8 +1,9 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.1
+ * Version:  6.5.1
  *
- * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2008 VMware, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -34,59 +35,80 @@
 #include "colormac.h"
 #include "context.h"
 #include "image.h"
+#include "mipmap.h"
 #include "texcompress.h"
 #include "texformat.h"
 #include "texstore.h"
 
+
 /**
- * Get the list of supported internal compression formats.
+ * Return list of (and count of) all specific texture compression
+ * formats that are supported.
  *
- * \param ctx GL context.
- * \param formats the resulting format list (may be NULL).
+ * \param ctx  the GL context
+ * \param formats  the resulting format list (may be NULL).
+ * \param all  if true return all formats, even those with  some kind
+ *             of restrictions/limitations (See GL_ARB_texture_compression
+ *             spec for more info).
  *
  * \return number of formats.
  */
 GLuint
-_mesa_get_compressed_formats( GLcontext *ctx, GLint *formats )
+_mesa_get_compressed_formats(GLcontext *ctx, GLint *formats, GLboolean all)
 {
    GLuint n = 0;
-   if (ctx->Extensions.ARB_texture_compression) {
-      if (ctx->Extensions.TDFX_texture_compression_FXT1) {
-         if (formats) {
-            formats[n++] = GL_COMPRESSED_RGB_FXT1_3DFX;
-            formats[n++] = GL_COMPRESSED_RGBA_FXT1_3DFX;
-         }
-         else {
-            n += 2;
-         }
+   if (ctx->Extensions.TDFX_texture_compression_FXT1) {
+      if (formats) {
+         formats[n++] = GL_COMPRESSED_RGB_FXT1_3DFX;
+         formats[n++] = GL_COMPRESSED_RGBA_FXT1_3DFX;
+      }
+      else {
+         n += 2;
+      }
+   }
+   if (ctx->Extensions.EXT_texture_compression_s3tc) {
+      if (formats) {
+         formats[n++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
+         /* This format has some restrictions/limitations and so should
+          * not be returned via the GL_COMPRESSED_TEXTURE_FORMATS query.
+          * Specifically, all transparent pixels become black.  NVIDIA
+          * omits this format too.
+          */
+         if (all)
+             formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
+         formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
+         formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+      }
+      else {
+         n += 3;
+         if (all)
+             n += 1;
       }
-      if (ctx->Extensions.EXT_texture_compression_s3tc) {
-         if (formats) {
-            formats[n++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
-            /* Skip this one because it has a restriction (all transparent
-             * pixels become black).  See the texture compressions spec for
-             * a detailed explanation.  This is what NVIDIA does.
-            formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
-            */
-            formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
-            formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
-         }
-         else {
-            n += 3;
-         }
+   }
+   if (ctx->Extensions.S3_s3tc) {
+      if (formats) {
+         formats[n++] = GL_RGB_S3TC;
+         formats[n++] = GL_RGB4_S3TC;
+         formats[n++] = GL_RGBA_S3TC;
+         formats[n++] = GL_RGBA4_S3TC;
       }
-      if (ctx->Extensions.S3_s3tc) {
-         if (formats) {
-            formats[n++] = GL_RGB_S3TC;
-            formats[n++] = GL_RGB4_S3TC;
-            formats[n++] = GL_RGBA_S3TC;
-            formats[n++] = GL_RGBA4_S3TC;
-         }
-         else {
-            n += 4;
-         }
+      else {
+         n += 4;
       }
    }
+#if FEATURE_EXT_texture_sRGB
+   if (ctx->Extensions.EXT_texture_sRGB) {
+      if (formats) {
+         formats[n++] = GL_COMPRESSED_SRGB_S3TC_DXT1_EXT;
+         formats[n++] = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
+         formats[n++] = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
+         formats[n++] = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
+      }
+      else {
+         n += 4;
+      }
+   }
+#endif /* FEATURE_EXT_texture_sRGB */
    return n;
 }
 
@@ -101,23 +123,25 @@ _mesa_get_compressed_formats( GLcontext *ctx, GLint *formats )
  * \param width texture width in texels.
  * \param height texture height in texels.
  * \param depth texture depth in texels.
- * \param format - one of the specific compressed texture formats
+ * \param mesaFormat  one of the MESA_FORMAT_* compressed formats
  *
  * \return size in bytes, or zero if bad format
  */
 GLuint
 _mesa_compressed_texture_size( GLcontext *ctx,
                                GLsizei width, GLsizei height, GLsizei depth,
-                               GLenum format )
+                               GLuint mesaFormat )
 {
    GLuint size;
 
    ASSERT(depth == 1);
    (void) depth;
+   (void) size;
 
-   switch (format) {
-   case GL_COMPRESSED_RGB_FXT1_3DFX:
-   case GL_COMPRESSED_RGBA_FXT1_3DFX:
+   switch (mesaFormat) {
+#if FEATURE_texture_fxt1
+   case MESA_FORMAT_RGB_FXT1:
+   case MESA_FORMAT_RGBA_FXT1:
       /* round up width to next multiple of 8, height to next multiple of 4 */
       width = (width + 7) & ~7;
       height = (height + 3) & ~3;
@@ -126,13 +150,15 @@ _mesa_compressed_texture_size( GLcontext *ctx,
       /* Textures smaller than 8x4 will effectively be made into 8x4 and
        * take 16 bytes.
        */
-      if (size < 16)
-         size = 16;
       return size;
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_RGB_S3TC:
-   case GL_RGB4_S3TC:
+#endif
+#if FEATURE_texture_s3tc
+   case MESA_FORMAT_RGB_DXT1:
+   case MESA_FORMAT_RGBA_DXT1:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGB_DXT1:
+   case MESA_FORMAT_SRGBA_DXT1:
+#endif
       /* round up width, height to next multiple of 4 */
       width = (width + 3) & ~3;
       height = (height + 3) & ~3;
@@ -141,13 +167,13 @@ _mesa_compressed_texture_size( GLcontext *ctx,
       /* Textures smaller than 4x4 will effectively be made into 4x4 and
        * take 8 bytes.
        */
-      if (size < 8)
-         size = 8;
       return size;
-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-   case GL_RGBA_S3TC:
-   case GL_RGBA4_S3TC:
+   case MESA_FORMAT_RGBA_DXT3:
+   case MESA_FORMAT_RGBA_DXT5:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGBA_DXT3:
+   case MESA_FORMAT_SRGBA_DXT5:
+#endif
       /* round up width, height to next multiple of 4 */
       width = (width + 3) & ~3;
       height = (height + 3) & ~3;
@@ -156,46 +182,119 @@ _mesa_compressed_texture_size( GLcontext *ctx,
       /* Textures smaller than 4x4 will effectively be made into 4x4 and
        * take 16 bytes.
        */
-      if (size < 16)
-         size = 16;
       return size;
+#endif
    default:
-      _mesa_problem(ctx, "bad texformat in compressed_texture_size");
+      _mesa_problem(ctx, "bad mesaFormat in _mesa_compressed_texture_size");
       return 0;
    }
 }
 
 
+/**
+ * As above, but format is specified by a GLenum (GL_COMPRESSED_*) token.
+ *
+ * Note: This function CAN NOT return a padded hardware texture size.
+ * That's why we don't call the ctx->Driver.CompressedTextureSize() function.
+ *
+ * We use this function to validate the <imageSize> parameter
+ * of glCompressedTex[Sub]Image1/2/3D(), which must be an exact match.
+ */
+GLuint
+_mesa_compressed_texture_size_glenum(GLcontext *ctx,
+                                     GLsizei width, GLsizei height,
+                                     GLsizei depth, GLenum glformat)
+{
+   GLuint mesaFormat;
+
+   switch (glformat) {
+#if FEATURE_texture_fxt1
+   case GL_COMPRESSED_RGB_FXT1_3DFX:
+      mesaFormat = MESA_FORMAT_RGB_FXT1;
+      break;
+   case GL_COMPRESSED_RGBA_FXT1_3DFX:
+      mesaFormat = MESA_FORMAT_RGBA_FXT1;
+      break;
+#endif
+#if FEATURE_texture_s3tc
+   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+   case GL_RGB_S3TC:
+      mesaFormat = MESA_FORMAT_RGB_DXT1;
+      break;
+   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+   case GL_RGB4_S3TC:
+      mesaFormat = MESA_FORMAT_RGBA_DXT1;
+      break;
+   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+   case GL_RGBA_S3TC:
+      mesaFormat = MESA_FORMAT_RGBA_DXT3;
+      break;
+   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+   case GL_RGBA4_S3TC:
+      mesaFormat = MESA_FORMAT_RGBA_DXT5;
+      break;
+#if FEATURE_EXT_texture_sRGB
+   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+      mesaFormat = MESA_FORMAT_SRGB_DXT1;
+      break;
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+      mesaFormat = MESA_FORMAT_SRGBA_DXT1;
+      break;
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+      mesaFormat = MESA_FORMAT_SRGBA_DXT3;
+      break;
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+      mesaFormat = MESA_FORMAT_SRGBA_DXT5;
+      break;
+#endif
+#endif
+   default:
+      return 0;
+   }
+
+   return _mesa_compressed_texture_size(ctx, width, height, depth, mesaFormat);
+}
+
+
 /*
  * Compute the bytes per row in a compressed texture image.
  * We use this for computing the destination address for sub-texture updates.
- * \param format  one of the specific texture compression formats
+ * \param mesaFormat  one of the MESA_FORMAT_* compressed formats
  * \param width  image width in pixels
  * \return stride, in bytes, between rows for compressed image
  */
 GLint
-_mesa_compressed_row_stride(GLenum format, GLsizei width)
+_mesa_compressed_row_stride(GLuint mesaFormat, GLsizei width)
 {
    GLint stride;
 
-   switch (format) {
-   case GL_COMPRESSED_RGB_FXT1_3DFX:
-   case GL_COMPRESSED_RGBA_FXT1_3DFX:
+   switch (mesaFormat) {
+#if FEATURE_texture_fxt1
+   case MESA_FORMAT_RGB_FXT1:
+   case MESA_FORMAT_RGBA_FXT1:
       stride = ((width + 7) / 8) * 16; /* 16 bytes per 8x4 tile */
       break;
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_RGB_S3TC:
-   case GL_RGB4_S3TC:
+#endif
+#if FEATURE_texture_s3tc
+   case MESA_FORMAT_RGB_DXT1:
+   case MESA_FORMAT_RGBA_DXT1:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGB_DXT1:
+   case MESA_FORMAT_SRGBA_DXT1:
+#endif
       stride = ((width + 3) / 4) * 8; /* 8 bytes per 4x4 tile */
       break;
-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-   case GL_RGBA_S3TC:
-   case GL_RGBA4_S3TC:
+   case MESA_FORMAT_RGBA_DXT3:
+   case MESA_FORMAT_RGBA_DXT5:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGBA_DXT3:
+   case MESA_FORMAT_SRGBA_DXT5:
+#endif
       stride = ((width + 3) / 4) * 16; /* 16 bytes per 4x4 tile */
       break;
+#endif
    default:
+      _mesa_problem(NULL, "bad mesaFormat in _mesa_compressed_row_stride");
       return 0;
    }
 
@@ -214,7 +313,7 @@ _mesa_compressed_row_stride(GLenum format, GLsizei width)
  */
 GLubyte *
 _mesa_compressed_image_address(GLint col, GLint row, GLint img,
-                               GLenum format,
+                               GLuint mesaFormat,
                                GLsizei width, const GLubyte *image)
 {
    GLubyte *addr;
@@ -229,25 +328,34 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img,
     * offset = Z * (((width + X - 1) / X) * (row / Y) + col / X);
     */
 
-   switch (format) {
-   case GL_COMPRESSED_RGB_FXT1_3DFX:
-   case GL_COMPRESSED_RGBA_FXT1_3DFX:
+   switch (mesaFormat) {
+#if FEATURE_texture_fxt1
+   case MESA_FORMAT_RGB_FXT1:
+   case MESA_FORMAT_RGBA_FXT1:
       addr = (GLubyte *) image + 16 * (((width + 7) / 8) * (row / 4) + col / 8);
       break;
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_RGB_S3TC:
-   case GL_RGB4_S3TC:
+#endif
+#if FEATURE_texture_s3tc
+   case MESA_FORMAT_RGB_DXT1:
+   case MESA_FORMAT_RGBA_DXT1:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGB_DXT1:
+   case MESA_FORMAT_SRGBA_DXT1:
+#endif
       addr = (GLubyte *) image + 8 * (((width + 3) / 4) * (row / 4) + col / 4);
       break;
-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-   case GL_RGBA_S3TC:
-   case GL_RGBA4_S3TC:
+   case MESA_FORMAT_RGBA_DXT3:
+   case MESA_FORMAT_RGBA_DXT5:
+#if FEATURE_EXT_texture_sRGB
+   case MESA_FORMAT_SRGBA_DXT3:
+   case MESA_FORMAT_SRGBA_DXT5:
+#endif
       addr = (GLubyte *) image + 16 * (((width + 3) / 4) * (row / 4) + col / 4);
       break;
+#endif
    default:
-      return NULL;
+      _mesa_problem(NULL, "bad mesaFormat in _mesa_compressed_image_address");
+      addr = NULL;
    }
 
    return addr;