From 6ea13078fb57c33243ffd24ee064d7425dd2faef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= <maraeo@gmail.com>
Date: Sat, 12 Mar 2011 21:44:59 +0100
Subject: [PATCH] st/mesa: fail to alloc a renderbuffer if
 st_choose_renderbuffer_format fails

This fixes:
  state_tracker/st_format.c:401:st_pipe_format_to_mesa_format:
  Assertion `0' failed.
(cherry picked from commit fb5d9e1199cabe653ae1bb822bb66ce9f0ce7f55)

Conflicts:

	src/mesa/state_tracker/st_cb_fbo.c
---
 src/mesa/state_tracker/st_cb_fbo.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index ce64a73f960..ff8eaad725a 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -74,6 +74,10 @@ st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
    else
       format = st_choose_renderbuffer_format(screen, internalFormat, rb->NumSamples);
       
+   if (format == PIPE_FORMAT_NONE) {
+      return FALSE;
+   }
+
    /* init renderbuffer fields */
    strb->Base.Width  = width;
    strb->Base.Height = height;