commit 7143316af216fa92c31a60d4407b707637382da1
author Dan Stoza <stoza@google.com> Tue Feb 04 16:22:36 2014 -0800
committer Dan Stoza <stoza@google.com> Tue Feb 04 16:46:54 2014 -0800
tree 947490d7fc78fe0897dee344f972107fd3423166
parent 1d41d5d82c0654313b33d45c7b8943eeba13469e

Fix virtual display nesting

This fixes the cycling rendering loop caused by nesting virtual
displays by preventing them from recomposing if their contents
haven't changed.

Bug: 12101046
Change-Id: I600365c0fd5d3ad93e04295d26cf9de177ffc79b

services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h

diff --git a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
index 1e85ac4..6899904 100644
--- a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
+++ b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
@@ -79,7 +79,7 @@
     //
     // DisplaySurface interface
     //
-    virtual status_t beginFrame();
+    virtual status_t beginFrame(bool mustRecompose);
     virtual status_t prepareFrame(CompositionType compositionType);
     virtual status_t compositionComplete();
     virtual status_t advanceFrame();
@@ -222,6 +222,8 @@
 
     const char* dbgStateStr() const;
     static const char* dbgSourceStr(Source s);
+
+    bool mMustRecompose;
 };
 
 // ---------------------------------------------------------------------------