Add back render-ahead support

Currently only supported in the EGL path.
Vulkan support Coming Soon

Bug: 127822449
Test: trace of hwuimacro
Change-Id: Iac2b039e11d964aab5b8ca1bdf2a5430b187e2ea

1 files changed, 4 insertions, 0 deletions

diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index abca34225f98..4a3119a55c77 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -204,6 +204,8 @@ public:
         return mUseForceDark;
     }
 
+    void setRenderAheadDepth(int renderAhead);
+
 private:
     CanvasContext(RenderThread& thread, bool translucent, RenderNode* rootRenderNode,
                   IContextFactory* contextFactory, std::unique_ptr<IRenderPipeline> renderPipeline);
@@ -217,6 +219,7 @@ private:
 
     bool isSwapChainStuffed();
     bool surfaceRequiresRedraw();
+    void applyRenderAheadSettings();
 
     SkRect computeDirtyRect(const Frame& frame, SkRect* dirty);
 
@@ -235,6 +238,7 @@ private:
     // painted onto its surface.
     bool mIsDirty = false;
     SwapBehavior mSwapBehavior = SwapBehavior::kSwap_default;
+    int mRenderAheadDepth = 0;
     struct SwapHistory {
         SkRect damage;
         nsecs_t vsyncTime;