3 files changed, 40 insertions, 38 deletions

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index dc8d97728b..8aef306fd8 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -751,6 +751,40 @@ _mesa_is_dudv_format(GLenum format)
 
 
 /**
+ * Test if an image format is a supported compressed format.
+ * \param format the internal format token provided by the user.
+ * \return GL_TRUE if compressed, GL_FALSE if uncompressed
+ */
+GLboolean
+_mesa_is_compressed_format(GLcontext *ctx, GLenum format)
+{
+   switch (format) {
+   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+      return ctx->Extensions.EXT_texture_compression_s3tc;
+   case GL_RGB_S3TC:
+   case GL_RGB4_S3TC:
+   case GL_RGBA_S3TC:
+   case GL_RGBA4_S3TC:
+      return ctx->Extensions.S3_s3tc;
+   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+      return ctx->Extensions.EXT_texture_sRGB
+         && ctx->Extensions.EXT_texture_compression_s3tc;
+   case GL_COMPRESSED_RGB_FXT1_3DFX:
+   case GL_COMPRESSED_RGBA_FXT1_3DFX:
+      return ctx->Extensions.TDFX_texture_compression_FXT1;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
  * Return the address of a specific pixel in an image (1D, 2D or 3D).
  *
  * Pixel unpacking/packing parameters are observed according to \p packing.
diff --git a/src/mesa/main/image.h b/src/mesa/main/image.h
index 9b34be0dfa..3947bbc278 100644
--- a/src/mesa/main/image.h
+++ b/src/mesa/main/image.h
@@ -75,6 +75,8 @@ _mesa_is_depthstencil_format(GLenum format);
 extern GLboolean
 _mesa_is_dudv_format(GLenum format);
 
+extern GLboolean
+_mesa_is_compressed_format(GLcontext *ctx, GLenum format);
 
 extern GLvoid *
 _mesa_image_address( GLuint dimensions,
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index b7cd5ab2f9..e0c5cf9c37 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -358,40 +358,6 @@ _mesa_base_tex_format( GLcontext *ctx, GLint internalFormat )
 
 
 /**
- * Test if a texture format is a supported compressed format.
- * \param internalFormat the internal format token provided by the user.
- * \return GL_TRUE if compressed, GL_FALSE if uncompressed
- */
-static GLboolean
-is_compressed_format(GLcontext *ctx, GLenum internalFormat)
-{
-   switch (internalFormat) {
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-      return ctx->Extensions.EXT_texture_compression_s3tc;
-   case GL_RGB_S3TC:
-   case GL_RGB4_S3TC:
-   case GL_RGBA_S3TC:
-   case GL_RGBA4_S3TC:
-      return ctx->Extensions.S3_s3tc;
-   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
-   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
-      return ctx->Extensions.EXT_texture_sRGB
-         && ctx->Extensions.EXT_texture_compression_s3tc;
-   case GL_COMPRESSED_RGB_FXT1_3DFX:
-   case GL_COMPRESSED_RGBA_FXT1_3DFX:
-      return ctx->Extensions.TDFX_texture_compression_FXT1;
-   default:
-      return GL_FALSE;
-   }
-}
-
-
-/**
  * For cube map faces, return a face index in [0,5].
  * For other targets return 0;
  */
@@ -1355,7 +1321,7 @@ texture_error_check( GLcontext *ctx, GLenum target,
    }
 
    /* additional checks for compressed textures */
-   if (is_compressed_format(ctx, internalFormat)) {
+   if (_mesa_is_compressed_format(ctx, internalFormat)) {
       if (!target_can_be_compressed(ctx, target) && !isProxy) {
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "glTexImage%d(target)", dimensions);
@@ -1721,7 +1687,7 @@ copytexture_error_check( GLcontext *ctx, GLuint dimensions,
       return GL_TRUE;
    }
 
-   if (is_compressed_format(ctx, internalFormat)) {
+   if (_mesa_is_compressed_format(ctx, internalFormat)) {
       if (!target_can_be_compressed(ctx, target)) {
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "glCopyTexImage%d(target)", dimensions);
@@ -3119,7 +3085,7 @@ compressed_texture_error_check(GLcontext *ctx, GLint dimensions,
    maxTextureSize = 1 << (maxLevels - 1);
 
    /* This will detect any invalid internalFormat value */
-   if (!is_compressed_format(ctx, internalFormat))
+   if (!_mesa_is_compressed_format(ctx, internalFormat))
       return GL_INVALID_ENUM;
 
    /* This should really never fail */
@@ -3224,7 +3190,7 @@ compressed_subtexture_error_check(GLcontext *ctx, GLint dimensions,
    maxTextureSize = 1 << (maxLevels - 1);
 
    /* this will catch any invalid compressed format token */
-   if (!is_compressed_format(ctx, format))
+   if (!_mesa_is_compressed_format(ctx, format))
       return GL_INVALID_ENUM;
 
    if (width < 1 || width > maxTextureSize)