From 50a3349bee04088bee3491622d6ef3c032d01eac Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 7 Sep 2010 14:31:22 -0700
Subject: mesa: Set the base format of GL_ALPHA FBOs and teach swrast about it.

Fixes assertion failures in fbo-alpha with a debug build of Mesa.
Bug #29781.
---
 src/mesa/main/fbobject.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/mesa/main/fbobject.c')

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index defdebbdefa..72cbb09ab83 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -925,6 +925,12 @@ GLenum
 _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
 {
    switch (internalFormat) {
+   case GL_ALPHA:
+   case GL_ALPHA4:
+   case GL_ALPHA8:
+   case GL_ALPHA12:
+   case GL_ALPHA16:
+      return GL_ALPHA;
    case GL_RGB:
    case GL_R3_G3_B2:
    case GL_RGB4:
-- 
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