From f86d7af4a0003997890edc84158e72c21c11037e Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Tue, 20 Apr 2010 16:12:34 -0600
Subject: [PATCH] mesa: raise GL_INVALID_OPERATION for
 glReadPixels(GL_COLOR_INDEX)

We no longer support CI-mode color buffers so this is always an error.
---
 src/mesa/main/readpix.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mesa/main/readpix.c b/src/mesa/main/readpix.c
index f4d74e8be6d..93f2bd31cc6 100644
--- a/src/mesa/main/readpix.c
+++ b/src/mesa/main/readpix.c
@@ -103,6 +103,12 @@ _mesa_error_check_format_type(GLcontext *ctx, GLenum format, GLenum type,
                         "glReadPixels(no color buffer)");
             return GL_TRUE;
          }
+         /* We no longer support CI-mode color buffers so trying to read
+          * GL_COLOR_INDEX pixels is always an error.
+          */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glReadPixels(color buffer is RGB)");
+         return GL_TRUE;
       }
       break;
    case GL_STENCIL_INDEX:
-- 
2.30.2