[HWUI]: fix residual line on FrameBuffer

Symptom: If app applies animation to enlarge a bitmap, there will be an residual
         line on the screen

Root Cause: On platform which has Tile Rendering implementation (ex. Qualcomm
            CPU), startTiling() call will restrict the framebuffer region which
            GPU can affect. So the expansion of clear region by 1 will not take
            effect if startTiling region is not expanded.

Solution: Expand the startTiling region by 1, too.

Reproduce steps: Apply animation to enlarge (and then shrink) a bitmap icon.

Cherry-pick of 20adb6ce4d52b15472e7e5ee953e06cc349a827c from AOSP

Change-Id: I163b898b87b74d221dc4210b7fa657aa93c82c19

1 files changed, 2 insertions, 2 deletions

diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index e7328be969ef..4e7844bb0bdc 100644..100755
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -491,14 +491,14 @@ private:
      * This method needs to be invoked every time getTargetFbo() is
      * bound again.
      */
-    void startTilingCurrentClip(bool opaque = false);
+    void startTilingCurrentClip(bool opaque = false, bool expand = false);
 
     /**
      * Tells the GPU what part of the screen is about to be redrawn.
      * This method needs to be invoked every time getTargetFbo() is
      * bound again.
      */
-    void startTiling(const Rect& clip, int windowHeight, bool opaque = false);
+    void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false);
 
     /**
      * Tells the GPU that we are done drawing the frame or that we