From 957f3c8c3d3b6a48bbcc24e9db2c110a7fde177b Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 15 May 2009 16:24:59 -0700
Subject: [PATCH] mesa: Mark FBOs with compressed color attachments as
 FBO-incomplete.

Both EXT_fbo and ARB_fbo agree on this.  Fixes a segfault in the metaops
mipmap generation in Intel for SGIS_generate_mipmap of S3TC textures in
Regnum Online.

Bug #21654.
(cherry picked from commit 0307e609aa3e707eeb40051bd664d36f2340ba9b)
---
 src/mesa/main/fbobject.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index e8e8c2bf30e..83301f1e621 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -368,6 +368,11 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
             att->Complete = GL_FALSE;
             return;
          }
+         if (texImage->TexFormat->TexelBytes == 0) {
+            att_incomplete("compressed internalformat");
+            att->Complete = GL_FALSE;
+            return;
+         }
       }
       else if (format == GL_DEPTH) {
          if (texImage->TexFormat->BaseFormat == GL_DEPTH_COMPONENT) {
-- 
2.30.2