commit cf185f5b0d30516ecb34350a585aed7f7d4e0672
author John Reck <jreck@google.com> Thu Apr 11 16:11:24 2019 -0700
committer John Reck <jreck@google.com> Thu Apr 18 14:20:56 2019 -0700
tree 4235b69aa096175a3e01db7ea62e7c1bcab30603
parent c4a3f5c3777da82d6f452d26f684a65e97ed963c

Dynamically adjust renderahead

Tracks refresh rate changes and adjusts renderahead
based off of the active refresh rate.

Default is 60hz = 0 render ahead & > 70hz is render ahead 1

Bug: 127822449
Test: systraced stuff

Change-Id: I9849aa065262f21f7602d44cd1761373279dc28d

libs/hwui/renderthread/CanvasContext.h

diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index 912b125..f9de002 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -204,7 +204,7 @@
     }
 
     // Must be called before setSurface
-    void setRenderAheadDepth(uint32_t renderAhead);
+    void setRenderAheadDepth(int renderAhead);
 
     SkISize getNextFrameSize() const;
 
@@ -221,7 +221,7 @@
 
     bool isSwapChainStuffed();
     bool surfaceRequiresRedraw();
-    void applyRenderAheadSettings();
+    void setPresentTime();
 
     SkRect computeDirtyRect(const Frame& frame, SkRect* dirty);
 
@@ -240,7 +240,9 @@
     // painted onto its surface.
     bool mIsDirty = false;
     SwapBehavior mSwapBehavior = SwapBehavior::kSwap_default;
+    bool mFixedRenderAhead = false;
     uint32_t mRenderAheadDepth = 0;
+    uint32_t mRenderAheadCapacity = 0;
     struct SwapHistory {
         SkRect damage;
         nsecs_t vsyncTime;