1 files changed, 88 insertions, 1 deletions

diff --git a/mesalib/src/mesa/main/texcompress.c b/mesalib/src/mesa/main/texcompress.c
index 42bd1eee5..4e5c14cbb 100644
--- a/mesalib/src/mesa/main/texcompress.c
+++ b/mesalib/src/mesa/main/texcompress.c
@@ -37,6 +37,9 @@
 #include "mfeatures.h"
 #include "mtypes.h"
 #include "texcompress.h"
+#include "texcompress_fxt1.h"
+#include "texcompress_rgtc.h"
+#include "texcompress_s3tc.h"
 
 
 /**
@@ -259,7 +262,6 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats)
          n += 4;
       }
    }
-   return n;
 
 #if FEATURE_ES1 || FEATURE_ES2
    if (formats) {
@@ -278,6 +280,8 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats)
       n += 10;
    }
 #endif
+
+   return n;
 }
 
 
@@ -437,3 +441,86 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img,
 
    return (GLubyte *) image + offset;
 }
+
+
+/**
+ * Decompress a compressed texture image, returning a GL_RGBA/GL_FLOAT image.
+ */
+void
+_mesa_decompress_image(gl_format format, GLuint width, GLuint height,
+                       const GLubyte *src, GLint srcRowStride,
+                       GLfloat *dest)
+{
+   void (*fetch)(const struct gl_texture_image *texImage,
+                 GLint i, GLint j, GLint k, GLfloat *texel);
+   struct gl_texture_image texImage;  /* dummy teximage */
+   GLuint i, j;
+
+   /* setup dummy texture image info */
+   memset(&texImage, 0, sizeof(texImage));
+   texImage.Data = (void *) src;
+   texImage.RowStride = srcRowStride;
+
+   switch (format) {
+   /* DXT formats */
+   case MESA_FORMAT_RGB_DXT1:
+      fetch = _mesa_fetch_texel_2d_f_rgb_dxt1;
+      break;
+   case MESA_FORMAT_RGBA_DXT1:
+      fetch = _mesa_fetch_texel_2d_f_rgba_dxt1;
+      break;
+   case MESA_FORMAT_RGBA_DXT3:
+      fetch = _mesa_fetch_texel_2d_f_rgba_dxt3;
+      break;
+   case MESA_FORMAT_RGBA_DXT5:
+      fetch = _mesa_fetch_texel_2d_f_rgba_dxt5;
+      break;
+
+   /* FXT1 formats */
+   case MESA_FORMAT_RGB_FXT1:
+      fetch = _mesa_fetch_texel_2d_f_rgb_fxt1;
+      break;
+   case MESA_FORMAT_RGBA_FXT1:
+      fetch = _mesa_fetch_texel_2d_f_rgba_fxt1;
+      break;
+
+   /* Red/RG formats */
+   case MESA_FORMAT_RED_RGTC1:
+      fetch = _mesa_fetch_texel_2d_f_red_rgtc1;
+      break;
+   case MESA_FORMAT_SIGNED_RED_RGTC1:
+      fetch = _mesa_fetch_texel_2d_f_signed_red_rgtc1;
+      break;
+   case MESA_FORMAT_RG_RGTC2:
+      fetch = _mesa_fetch_texel_2d_f_rg_rgtc2;
+      break;
+   case MESA_FORMAT_SIGNED_RG_RGTC2:
+      fetch = _mesa_fetch_texel_2d_f_signed_rg_rgtc2;
+      break;
+
+   /* L/LA formats */
+   case MESA_FORMAT_L_LATC1:
+      fetch = _mesa_fetch_texel_2d_f_l_latc1;
+      break;
+   case MESA_FORMAT_SIGNED_L_LATC1:
+      fetch = _mesa_fetch_texel_2d_f_signed_l_latc1;
+      break;
+   case MESA_FORMAT_LA_LATC2:
+      fetch = _mesa_fetch_texel_2d_f_la_latc2;
+      break;
+   case MESA_FORMAT_SIGNED_LA_LATC2:
+      fetch = _mesa_fetch_texel_2d_f_signed_la_latc2;
+      break;
+
+   default:
+      _mesa_problem(NULL, "Unexpected format in _mesa_decompress_image()");
+      return;
+   }
+
+   for (j = 0; j < height; j++) {
+      for (i = 0; i < width; i++) {
+         fetch(&texImage, i, j, 0, dest);
+         dest += 4;
+      }
+   }
+}