From: Michel Dänzer <michel@tungstengraphics.com>
Date: Mon, 30 Apr 2007 16:28:24 +0000 (+0200)
Subject: r300: Don't crash in radeonUpdatePageFlipping when !radeon->glCtx->DrawBuffer.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=65faf023679988f93da82b4c7ebdc689f2094459;p=mesa.git

r300: Don't crash in radeonUpdatePageFlipping when !radeon->glCtx->DrawBuffer.

This feels like a kludge, maybe there's a better solution.
---

diff --git a/src/mesa/drivers/dri/r300/radeon_lock.c b/src/mesa/drivers/dri/r300/radeon_lock.c
index 84181e2e99e..0d0d9ab7f06 100644
--- a/src/mesa/drivers/dri/r300/radeon_lock.c
+++ b/src/mesa/drivers/dri/r300/radeon_lock.c
@@ -60,7 +60,9 @@ void radeonUpdatePageFlipping(radeonContextPtr radeon)
            r300UpdateDrawBuffer(radeon->glCtx);
         }
 
-	use_back = (radeon->glCtx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT);
+	use_back = radeon->glCtx->DrawBuffer ?
+		(radeon->glCtx->DrawBuffer->_ColorDrawBufferMask[0] ==
+		 BUFFER_BIT_BACK_LEFT) : 1;
 	use_back ^= (radeon->sarea->pfCurrentPage == 1);
 
 	if (use_back) {