commit 1125d1fa92ab9f3b8315bbfb72e038b62dfd454b
author John Reck <jreck@google.com> Thu Oct 23 11:02:19 2014 -0700
committer John Reck <jreck@google.com> Thu Oct 23 13:59:47 2014 -0700
tree b4a292e191bc815bb658355f879178706ed3f3e9
parent 9b67a1a232dc0e1cda346271c3a9d118228001ee

Add some free zoom to lockHardwareCanvas

Bug: 18099195

Don't use EGL_SWAP_BUFFER_PRESERVED on surfaces that will
never benefit. Also clean up some confusing naming

Change-Id: I674ca64e0464a3282cff79e5ecd350d08f47c014

libs/hwui/renderthread/CanvasContext.h

diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index d4282fa..e20564b 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -48,6 +48,11 @@
 
 class EglManager;
 
+enum SwapBehavior {
+    kSwap_default,
+    kSwap_discardBuffer,
+};
+
 // This per-renderer class manages the bridge between the global EGL context
 // and the render surface.
 // TODO: Rename to Renderer or some other per-window, top-level manager
@@ -57,6 +62,9 @@
             IContextFactory* contextFactory);
     virtual ~CanvasContext();
 
+    // Won't take effect until next EGLSurface creation
+    void setSwapBehavior(SwapBehavior swapBehavior);
+
     bool initialize(ANativeWindow* window);
     void updateSurface(ANativeWindow* window);
     void pauseSurface(ANativeWindow* window);
@@ -111,7 +119,8 @@
     EglManager& mEglManager;
     sp<ANativeWindow> mNativeWindow;
     EGLSurface mEglSurface;
-    bool mDirtyRegionsEnabled;
+    bool mBufferPreserved;
+    SwapBehavior mSwapBehavior;
 
     bool mOpaque;
     OpenGLRenderer* mCanvas;