1 files changed, 115 insertions, 2 deletions
diff --git a/mesalib/src/mesa/main/glformats.c b/mesalib/src/mesa/main/glformats.c
index ba79f193b..69caef70b 100644
--- a/mesalib/src/mesa/main/glformats.c
+++ b/mesalib/src/mesa/main/glformats.c
@@ -821,10 +821,10 @@ _mesa_is_compressed_format(struct gl_context *ctx, GLenum format)
    case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
    case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
    case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
-      return ctx->API == API_OPENGL
+      return ctx->API == API_OPENGL_COMPAT
          && ctx->Extensions.EXT_texture_compression_latc;
    case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
-      return ctx->API == API_OPENGL
+      return ctx->API == API_OPENGL_COMPAT
          && ctx->Extensions.ATI_texture_compression_3dc;
    case GL_ETC1_RGB8_OES:
       return _mesa_is_gles(ctx)
@@ -1008,6 +1008,119 @@ _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
 
 
 /**
+ * Return the equivalent non-generic internal format.
+ * This is useful for comparing whether two internal formats are equivalent.
+ */
+GLenum
+_mesa_get_nongeneric_internalformat(GLenum format)
+{
+   switch (format) {
+      /* GL 1.1 formats. */
+      case 4:
+      case GL_RGBA:
+         return GL_RGBA8;
+
+      case 3:
+      case GL_RGB:
+         return GL_RGB8;
+
+      case 2:
+      case GL_LUMINANCE_ALPHA:
+         return GL_LUMINANCE8_ALPHA8;
+
+      case 1:
+      case GL_LUMINANCE:
+         return GL_LUMINANCE8;
+
+      case GL_ALPHA:
+         return GL_ALPHA8;
+
+      case GL_INTENSITY:
+         return GL_INTENSITY8;
+
+      /* GL_ARB_texture_rg */
+      case GL_RED:
+         return GL_R8;
+
+      case GL_RG:
+         return GL_RG8;
+
+      /* GL_EXT_texture_sRGB */
+      case GL_SRGB:
+         return GL_SRGB8;
+
+      case GL_SRGB_ALPHA:
+         return GL_SRGB8_ALPHA8;
+
+      case GL_SLUMINANCE:
+         return GL_SLUMINANCE8;
+
+      case GL_SLUMINANCE_ALPHA:
+         return GL_SLUMINANCE8_ALPHA8;
+
+      /* GL_EXT_texture_snorm */
+      case GL_RGBA_SNORM:
+         return GL_RGBA8_SNORM;
+
+      case GL_RGB_SNORM:
+         return GL_RGB8_SNORM;
+
+      case GL_RG_SNORM:
+         return GL_RG8_SNORM;
+
+      case GL_RED_SNORM:
+         return GL_R8_SNORM;
+
+      case GL_LUMINANCE_ALPHA_SNORM:
+         return GL_LUMINANCE8_ALPHA8_SNORM;
+
+      case GL_LUMINANCE_SNORM:
+         return GL_LUMINANCE8_SNORM;
+
+      case GL_ALPHA_SNORM:
+         return GL_ALPHA8_SNORM;
+
+      case GL_INTENSITY_SNORM:
+         return GL_INTENSITY8_SNORM;
+
+      default:
+         return format;
+   }
+}
+
+
+/**
+ * Convert an sRGB internal format to linear.
+ */
+GLenum
+_mesa_get_linear_internalformat(GLenum format)
+{
+   switch (format) {
+   case GL_SRGB:
+      return GL_RGB;
+
+   case GL_SRGB_ALPHA:
+      return GL_RGBA;
+
+   case GL_SRGB8:
+      return GL_RGB8;
+
+   case GL_SRGB8_ALPHA8:
+      return GL_RGBA8;
+
+   case GL_SLUMINANCE:
+      return GL_LUMINANCE8;
+
+   case GL_SLUMINANCE_ALPHA:
+      return GL_LUMINANCE8_ALPHA8;
+
+   default:
+      return format;
+   }
+}
+
+
+/**
  * Do error checking of format/type combinations for glReadPixels,
  * glDrawPixels and glTex[Sub]Image.  Note that depending on the format
  * and type values, we may either generate GL_INVALID_OPERATION or