xorg-x11-server/u_render-Cast-color-masks-to-unsigned-long-before-shifting-them.patch

From: Egbert Eich <eich@hammer45.arch.suse.de>
Date: Fri May 30 19:08:00 2014 -0400
Subject: [PATCH]render: Cast color masks to unsigned long before shifting them
Patch-mainline: to be upstreamed
Git-commit: 6ec9a78f9b79668239c3a1519d715cbecf186cef
Git-repo: 
References: bnc#876757
Signed-off-by: Egbert Eich <eich@suse.com>

The color masks in DirectFormatRec are CARD16. Shifting them may lead
to unexpected results. Cast them to unsigned long to make sure the
shifted value will still fit into that type.

Signed-off-by: Egbert Eich <eich@suse.de>
---
 render/picture.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/render/picture.c b/render/picture.c
index 2908b76..74369de 100644
--- a/render/picture.c
+++ b/render/picture.c
@@ -548,12 +548,12 @@ PictureMatchVisual(ScreenPtr pScreen, int depth, VisualPtr pVisual)
                     return format;
             }
             else {
-                if (format->direct.redMask << format->direct.red ==
-                    pVisual->redMask &&
-                    format->direct.greenMask << format->direct.green ==
-                    pVisual->greenMask &&
-                    format->direct.blueMask << format->direct.blue ==
-                    pVisual->blueMask) {
+	      if (((unsigned long)format->direct.redMask) <<
+		  format->direct.red  == pVisual->redMask &&
+		  ((unsigned long)format->direct.greenMask) <<
+		  format->direct.green == pVisual->greenMask &&
+                  ((unsigned long)format->direct.blueMask) <<
+		  format->direct.blue == pVisual->blueMask) {
                     return format;
                 }
             }