From: José Fonseca <jfonseca@vmware.com>
Date: Thu, 2 Dec 2010 20:21:39 +0000 (+0000)
Subject: wgl: Fix visual's buffer_mask configuration.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=63df5a464e984af771b3896d05baa258912ac202;p=mesa.git

wgl: Fix visual's buffer_mask configuration.
---

diff --git a/src/gallium/state_trackers/wgl/stw_pixelformat.c b/src/gallium/state_trackers/wgl/stw_pixelformat.c
index 18ac4823696..5ede1d43220 100644
--- a/src/gallium/state_trackers/wgl/stw_pixelformat.c
+++ b/src/gallium/state_trackers/wgl/stw_pixelformat.c
@@ -185,7 +185,7 @@ stw_pixelformat_add(
     */
    pfi->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
    if (doublebuffer)
-      pfi->stvis.buffer_mask = ST_ATTACHMENT_BACK_LEFT_MASK;
+      pfi->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 
    pfi->stvis.color_format = color->format;
    pfi->stvis.depth_stencil_format = depth->format;