Mesa (map-texture-image-v5): meta: check if compressed format is unsigned

[Brian Paul]

Module: Mesa
Branch: map-texture-image-v5
Commit: dd1ac5a60d60b75ce13ddb051d8cc7e43b6d93f1
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dd1ac5a60d60b75ce13ddb051d8cc7e43b6d93f1

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Aug 31 20:04:15 2011 -0600

meta: check if compressed format is unsigned

For now, the decompress-with-textured-quad approach only works with unsigned
compressed formats.  Add a check for that.

---

 src/mesa/drivers/common/meta.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 7171916..3d0aa80 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -3284,7 +3284,9 @@ _mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level,
                        struct gl_texture_object *texObj,
                        struct gl_texture_image *texImage)
 {
-   if (_mesa_is_format_compressed(texImage->TexFormat)) {
+   if (_mesa_is_format_compressed(texImage->TexFormat) &&
+       _mesa_get_format_datatype(texImage->TexFormat)
+       == GL_UNSIGNED_NORMALIZED) {
       const GLuint slice = 0; /* only 2D compressed textures for now */
       /* Need to unlock the texture here to prevent deadlock... */
       _mesa_unlock_texture(ctx, texObj);