Add support for render-ahead

For periods of time during which latency is less important
allow a client to request a deeper render-ahead pipeline.

The latency tradeoff results in less overall visual jank

Test: none, only used by macrobench

Change-Id: I516203b70bdc75b6415fa08bf9c4fb1b598b0102

1 files changed, 6 insertions, 0 deletions

diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index c6a9b55f8ac1..00645d6d8487 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -290,6 +290,12 @@ void RenderProxy::removeFrameMetricsObserver(FrameMetricsObserver* observerPtr)
     });
 }
 
+void RenderProxy::setRenderAheadDepth(int renderAhead) {
+    mRenderThread.queue().post([ context = mContext, renderAhead ]() {
+        context->setRenderAheadDepth(renderAhead);
+    });
+}
+
 int RenderProxy::copySurfaceInto(sp<Surface>& surface, int left, int top, int right, int bottom,
                                  SkBitmap* bitmap) {
     auto& thread = RenderThread::getInstance();