commit f138b174fdbbfe73572148f09da7f00ab5261dc4
author John Reck <jreck@google.com> Fri Sep 08 11:00:42 2017 -0700
committer John Reck <jreck@google.com> Fri Sep 08 11:00:42 2017 -0700
tree ea190c12782ff05a2f9cb586d26e0650ef428448
parent 95786f322a4b69d7dcd3131a7d15030735c4d112

Fix flicker from multiwindow resize

Move content bounds into DrawFrameTask. This ensures
that changes in bounds are synchronized with changes in
rendering commands, avoiding potential underdraw.

Bug: 64200212
Test: Repro steps in bug. Drag up/down on resize handle, verify
no flicker.

Change-Id: I3109acf262e23c2a7d8904f1dcbfc8273aaed65b

libs/hwui/renderthread/DrawFrameTask.cpp

diff --git a/libs/hwui/renderthread/DrawFrameTask.cpp b/libs/hwui/renderthread/DrawFrameTask.cpp
index 7d641d3..a097272 100644
--- a/libs/hwui/renderthread/DrawFrameTask.cpp
+++ b/libs/hwui/renderthread/DrawFrameTask.cpp
@@ -32,6 +32,7 @@
 DrawFrameTask::DrawFrameTask()
         : mRenderThread(nullptr)
         , mContext(nullptr)
+        , mContentDrawBounds(0, 0, 0, 0)
         , mSyncResult(SyncResult::OK) {
 }
 
@@ -123,6 +124,7 @@
         mLayers[i]->apply();
     }
     mLayers.clear();
+    mContext->setContentDrawBounds(mContentDrawBounds);
     mContext->prepareTree(info, mFrameInfo, mSyncQueued, mTargetNode);
 
     // This is after the prepareTree so that any pending operations