Second Patch for async RenderEngine

- pass a vector of <LayerSettings> instead of a vector of pointers to
drawLayers function to ensure lifecycle safety.
- capture all local variables to call drawLayerInternals in the render
engine thread to avoid of pointers being invalidated if it takes long
time to pop mFunctions calls.
- change renderScreenImplLocked return type as a shared_future
object to unblock SF main thread for screen capture events.
- block region sampling thread only when SF main thread hasn't
completed capture screen event.

Bug: 180657548
Test: SurfaceFlinger_test, android.hardware.graphics.composer@2.2-vts, libcompositionengine_test, librenderengine_test, libsurfaceflinger_unittest pass
Change-Id: I615f2927d30524988fb12df22fe331e7217c3058

1 files changed, 7 insertions, 4 deletions

diff --git a/services/surfaceflinger/RegionSamplingThread.cpp b/services/surfaceflinger/RegionSamplingThread.cpp
index aa2fec56ad..d0f56b5bdd 100644
--- a/services/surfaceflinger/RegionSamplingThread.cpp
+++ b/services/surfaceflinger/RegionSamplingThread.cpp
@@ -356,10 +356,13 @@ void RegionSamplingThread::captureSample() {
                                                renderengine::ExternalTexture::Usage::WRITEABLE);
     }
 
-    const sp<SyncScreenCaptureListener> captureListener = new SyncScreenCaptureListener();
-    mFlinger.captureScreenCommon(std::move(renderAreaFuture), traverseLayers, buffer,
-                                 true /* regionSampling */, false /* grayscale */, captureListener);
-    ScreenCaptureResults captureResults = captureListener->waitForResults();
+    auto captureScreenResultFuture =
+            mFlinger.captureScreenCommon(std::move(renderAreaFuture), traverseLayers, buffer,
+                                         true /* regionSampling */, false /* grayscale */, nullptr);
+    auto& captureScreenResult = captureScreenResultFuture.get();
+    if (captureScreenResult.drawFence.ok()) {
+        sync_wait(captureScreenResult.drawFence.get(), -1);
+    }
 
     std::vector<Descriptor> activeDescriptors;
     for (const auto& descriptor : descriptors) {