From: Adam Jackson <ajax@redhat.com>
Date: Tue, 5 Nov 2013 15:08:17 +0000 (-0500)
Subject: composite: Automatically enable backing store support on the screen
X-Git-Tag: xorg-server-1.14.99.904~21
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a2b2c271e0ca87d3188ba2741b6db9bbbdc599f5;p=platform%2Fupstream%2Fxorg-server.git

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>
---

diff --git a/composite/compinit.c b/composite/compinit.c
index bc1130e..6431464 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;
 
diff --git a/hw/xfree86/common/xf86Helper.c b/hw/xfree86/common/xf86Helper.c
index 4f1f3d4..f1e6783 100644
--- a/hw/xfree86/common/xf86Helper.c
+++ b/hw/xfree86/common/xf86Helper.c
@@ -1638,6 +1638,11 @@ xf86SetBackingStore(ScreenPtr pScreen)
     else {
         if (xf86GetOptValBool(options, OPTION_BACKING_STORE, &useBS))
             from = X_CONFIG;
+#ifdef COMPOSITE
+        if (from != X_CONFIG)
+            useBS = xf86ReturnOptValBool(options, OPTION_BACKING_STORE,
+                                         !noCompositeExtension);
+#endif
     }
     free(options);
     pScreen->backingStoreSupport = useBS ? WhenMapped : NotUseful;