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, 8 insertions, 11 deletions

diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index 6a2a025da121..4b154e6f560d 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -25,8 +25,8 @@
 #include "hwui/Bitmap.h"
 #include "pipeline/skia/SkiaOpenGLPipeline.h"
 #include "pipeline/skia/SkiaOpenGLReadback.h"
-#include "pipeline/skia/SkiaVulkanReadback.h"
 #include "pipeline/skia/SkiaVulkanPipeline.h"
+#include "pipeline/skia/SkiaVulkanReadback.h"
 #include "renderstate/RenderState.h"
 #include "renderthread/OpenGLPipeline.h"
 #include "utils/FatVector.h"
@@ -93,14 +93,11 @@ public:
     DummyVsyncSource(RenderThread* renderThread) : mRenderThread(renderThread) {}
 
     virtual void requestNextVsync() override {
-        mRenderThread->queue().postDelayed(16_ms, [this]() {
-            mRenderThread->drainDisplayEventQueue();
-        });
+        mRenderThread->queue().postDelayed(16_ms,
+                                           [this]() { mRenderThread->drainDisplayEventQueue(); });
     }
 
-    virtual nsecs_t latestVsyncEvent() override {
-        return systemTime(CLOCK_MONOTONIC);
-    }
+    virtual nsecs_t latestVsyncEvent() override { return systemTime(CLOCK_MONOTONIC); }
 
 private:
     RenderThread* mRenderThread;
@@ -147,13 +144,13 @@ void RenderThread::initializeDisplayEventReceiver() {
         auto receiver = std::make_unique<DisplayEventReceiver>();
         status_t status = receiver->initCheck();
         LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
-                "Initialization of DisplayEventReceiver "
-                        "failed with status: %d",
-                status);
+                            "Initialization of DisplayEventReceiver "
+                            "failed with status: %d",
+                            status);
 
         // Register the FD
         mLooper->addFd(receiver->getFd(), 0, Looper::EVENT_INPUT,
-                RenderThread::displayEventReceiverCallback, this);
+                       RenderThread::displayEventReceiverCallback, this);
         mVsyncSource = new DisplayEventReceiverWrapper(std::move(receiver));
     } else {
         mVsyncSource = new DummyVsyncSource(this);