From a2b2c271e0ca87d3188ba2741b6db9bbbdc599f5 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Tue, 5 Nov 2013 10:08:17 -0500
Subject: composite: Automatically enable backing store support on the screen

... unless you explicitly disabled it with -bs on the command line, or
with the corresponding thing in xorg.conf.

v2: Drop a bogus hunk from compChangeWindowAttributes [vsyrjala]
v3: s/TRUE/WhenMapped/ [jcristau]

Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
---
 composite/compinit.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'composite')

diff --git a/composite/compinit.c b/composite/compinit.c
index bc1130e78..64314640f 100644
--- a/composite/compinit.c
+++ b/composite/compinit.c
@@ -355,6 +355,9 @@ compScreenInit(ScreenPtr pScreen)
         return FALSE;
     }
 
+    if (!disableBackingStore)
+        pScreen->backingStoreSupport = WhenMapped;
+
     cs->PositionWindow = pScreen->PositionWindow;
     pScreen->PositionWindow = compPositionWindow;
 
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