Merge "[RenderEngine] Allow rounded corners shader to use lower precision." into qt-r1-dev
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index d6f88fc..def9fe9 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -365,6 +365,9 @@
     mContainsBuffer = other.mContainsBuffer;
     other.mContainsBuffer = false;
 
+    mEarlyWakeup = mEarlyWakeup || other.mEarlyWakeup;
+    other.mEarlyWakeup = false;
+
     return *this;
 }
 
diff --git a/services/surfaceflinger/BufferLayerConsumer.cpp b/services/surfaceflinger/BufferLayerConsumer.cpp
index 6709fb4..bd9bd81 100644
--- a/services/surfaceflinger/BufferLayerConsumer.cpp
+++ b/services/surfaceflinger/BufferLayerConsumer.cpp
@@ -369,6 +369,15 @@
     return mCurrentSurfaceDamage;
 }
 
+void BufferLayerConsumer::mergeSurfaceDamage(const Region& damage) {
+    if (damage.bounds() == Rect::INVALID_RECT ||
+        mCurrentSurfaceDamage.bounds() == Rect::INVALID_RECT) {
+        mCurrentSurfaceDamage = Region::INVALID_REGION;
+    } else {
+        mCurrentSurfaceDamage |= damage;
+    }
+}
+
 int BufferLayerConsumer::getCurrentApi() const {
     Mutex::Autolock lock(mMutex);
     return mCurrentApi;
diff --git a/services/surfaceflinger/BufferLayerConsumer.h b/services/surfaceflinger/BufferLayerConsumer.h
index e3f6100..901556a 100644
--- a/services/surfaceflinger/BufferLayerConsumer.h
+++ b/services/surfaceflinger/BufferLayerConsumer.h
@@ -140,6 +140,9 @@
     // must be called from SF main thread
     const Region& getSurfaceDamage() const;
 
+    // Merge the given damage region into the current damage region value.
+    void mergeSurfaceDamage(const Region& damage);
+
     // getCurrentApi retrieves the API which queues the current buffer.
     int getCurrentApi() const;
 
diff --git a/services/surfaceflinger/BufferQueueLayer.cpp b/services/surfaceflinger/BufferQueueLayer.cpp
index d685366..f35a4fd 100644
--- a/services/surfaceflinger/BufferQueueLayer.cpp
+++ b/services/surfaceflinger/BufferQueueLayer.cpp
@@ -316,6 +316,7 @@
         // and return early
         if (queuedBuffer) {
             Mutex::Autolock lock(mQueueItemLock);
+            mConsumer->mergeSurfaceDamage(mQueueItems[0].mSurfaceDamage);
             mFlinger->mTimeStats->removeTimeRecord(layerID, mQueueItems[0].mFrameNumber);
             mQueueItems.removeAt(0);
             mQueuedFrames--;
@@ -351,6 +352,7 @@
         // Remove any stale buffers that have been dropped during
         // updateTexImage
         while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
+            mConsumer->mergeSurfaceDamage(mQueueItems[0].mSurfaceDamage);
             mFlinger->mTimeStats->removeTimeRecord(layerID, mQueueItems[0].mFrameNumber);
             mQueueItems.removeAt(0);
             mQueuedFrames--;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index e58e092..e6d0dcb 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -358,6 +358,11 @@
     mPropagateBackpressure = !atoi(value);
     ALOGI_IF(!mPropagateBackpressure, "Disabling backpressure propagation");
 
+    property_get("debug.sf.enable_gl_backpressure", value, "0");
+    mPropagateBackpressureClientComposition = atoi(value);
+    ALOGI_IF(mPropagateBackpressureClientComposition,
+             "Enabling backpressure propagation for Client Composition");
+
     property_get("debug.sf.enable_hwc_vds", value, "0");
     mUseHwcVirtualDisplays = atoi(value);
     ALOGI_IF(mUseHwcVirtualDisplays, "Enabling HWC virtual displays");
@@ -1688,22 +1693,26 @@
     return fence != Fence::NO_FENCE && (fence->getStatus() == Fence::Status::Unsignaled);
 }
 
-nsecs_t SurfaceFlinger::getExpectedPresentTime() NO_THREAD_SAFETY_ANALYSIS {
+void SurfaceFlinger::populateExpectedPresentTime() NO_THREAD_SAFETY_ANALYSIS {
     DisplayStatInfo stats;
     mScheduler->getDisplayStatInfo(&stats);
     const nsecs_t presentTime = mScheduler->getDispSyncExpectedPresentTime();
     // Inflate the expected present time if we're targetting the next vsync.
-    const nsecs_t correctedTime =
+    mExpectedPresentTime =
             mVsyncModulator.getOffsets().sf < mPhaseOffsets->getOffsetThresholdForNextVsync()
             ? presentTime
             : presentTime + stats.vsyncPeriod;
-    return correctedTime;
 }
 
 void SurfaceFlinger::onMessageReceived(int32_t what) NO_THREAD_SAFETY_ANALYSIS {
     ATRACE_CALL();
     switch (what) {
         case MessageQueue::INVALIDATE: {
+            // calculate the expected present time once and use the cached
+            // value throughout this frame to make sure all layers are
+            // seeing this same value.
+            populateExpectedPresentTime();
+
             bool frameMissed = previousFrameMissed();
             bool hwcFrameMissed = mHadDeviceComposition && frameMissed;
             bool gpuFrameMissed = mHadClientComposition && frameMissed;
@@ -1733,9 +1742,9 @@
                 break;
             }
 
-            // For now, only propagate backpressure when missing a hwc frame.
-            if (hwcFrameMissed && !gpuFrameMissed) {
-                if (mPropagateBackpressure) {
+            if (frameMissed && mPropagateBackpressure) {
+                if ((hwcFrameMissed && !gpuFrameMissed) ||
+                    mPropagateBackpressureClientComposition) {
                     signalLayerUpdate();
                     break;
                 }
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 556a4b9..97d67aa 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -301,10 +301,11 @@
     // TODO: this should be made accessible only to MessageQueue
     void onMessageReceived(int32_t what);
 
-    // Returns the expected present time for this frame.
+    // populates the expected present time for this frame.
     // When we are in negative offsets, we perform a correction so that the
     // predicted vsync for the *next* frame is used instead.
-    nsecs_t getExpectedPresentTime();
+    void populateExpectedPresentTime();
+    nsecs_t getExpectedPresentTime() const { return mExpectedPresentTime; }
 
     // for debugging only
     // TODO: this should be made accessible only to HWComposer
@@ -1016,6 +1017,7 @@
     volatile nsecs_t mDebugInTransaction = 0;
     bool mForceFullDamage = false;
     bool mPropagateBackpressure = true;
+    bool mPropagateBackpressureClientComposition = false;
     std::unique_ptr<SurfaceInterceptor> mInterceptor;
     SurfaceTracing mTracing{*this};
     bool mTracingEnabled = false;
@@ -1184,6 +1186,8 @@
     // Flags to capture the state of Vsync in HWC
     HWC2::Vsync mHWCVsyncState = HWC2::Vsync::Disable;
     HWC2::Vsync mHWCVsyncPendingState = HWC2::Vsync::Disable;
+
+    nsecs_t mExpectedPresentTime;
 };
 
 } // namespace android
diff --git a/services/surfaceflinger/tests/Transaction_test.cpp b/services/surfaceflinger/tests/Transaction_test.cpp
index d5f6534..c93e15e 100644
--- a/services/surfaceflinger/tests/Transaction_test.cpp
+++ b/services/surfaceflinger/tests/Transaction_test.cpp
@@ -28,6 +28,7 @@
 
 #include <binder/ProcessState.h>
 #include <gui/BufferItemConsumer.h>
+#include <gui/IProducerListener.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/LayerState.h>
 #include <gui/Surface.h>
@@ -6059,4 +6060,97 @@
     }
 }
 
+// This test ensures that when we drop an app buffer in SurfaceFlinger, we merge
+// the dropped buffer's damage region into the next buffer's damage region. If
+// we don't do this, we'll report an incorrect damage region to hardware
+// composer, resulting in broken rendering. This test checks the BufferQueue
+// case.
+//
+// Unfortunately, we don't currently have a way to inspect the damage region
+// SurfaceFlinger sends to hardware composer from a test, so this test requires
+// the dev to manually watch the device's screen during the test to spot broken
+// rendering. Because the results can't be automatically verified, this test is
+// marked disabled.
+TEST_F(LayerTransactionTest, DISABLED_BufferQueueLayerMergeDamageRegionWhenDroppingBuffers) {
+    const int width = mDisplayWidth;
+    const int height = mDisplayHeight;
+    sp<SurfaceControl> layer;
+    ASSERT_NO_FATAL_FAILURE(layer = createLayer("test", width, height));
+    const auto producer = layer->getIGraphicBufferProducer();
+    const sp<IProducerListener> dummyListener(new DummyProducerListener);
+    IGraphicBufferProducer::QueueBufferOutput queueBufferOutput;
+    ASSERT_EQ(OK,
+              producer->connect(dummyListener, NATIVE_WINDOW_API_CPU, true, &queueBufferOutput));
+
+    std::map<int, sp<GraphicBuffer>> slotMap;
+    auto slotToBuffer = [&](int slot, sp<GraphicBuffer>* buf) {
+        ASSERT_NE(nullptr, buf);
+        const auto iter = slotMap.find(slot);
+        ASSERT_NE(slotMap.end(), iter);
+        *buf = iter->second;
+    };
+
+    auto dequeue = [&](int* outSlot) {
+        ASSERT_NE(nullptr, outSlot);
+        *outSlot = -1;
+        int slot;
+        sp<Fence> fence;
+        uint64_t age;
+        FrameEventHistoryDelta timestamps;
+        const status_t dequeueResult =
+                producer->dequeueBuffer(&slot, &fence, width, height, PIXEL_FORMAT_RGBA_8888,
+                                        GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
+                                        &age, &timestamps);
+        if (dequeueResult == IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) {
+            sp<GraphicBuffer> newBuf;
+            ASSERT_EQ(OK, producer->requestBuffer(slot, &newBuf));
+            ASSERT_NE(nullptr, newBuf.get());
+            slotMap[slot] = newBuf;
+        } else {
+            ASSERT_EQ(OK, dequeueResult);
+        }
+        *outSlot = slot;
+    };
+
+    auto queue = [&](int slot, const Region& damage, nsecs_t displayTime) {
+        IGraphicBufferProducer::QueueBufferInput input(
+                /*timestamp=*/displayTime, /*isAutoTimestamp=*/false, HAL_DATASPACE_UNKNOWN,
+                /*crop=*/Rect::EMPTY_RECT, NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW,
+                /*transform=*/0, Fence::NO_FENCE);
+        input.setSurfaceDamage(damage);
+        IGraphicBufferProducer::QueueBufferOutput output;
+        ASSERT_EQ(OK, producer->queueBuffer(slot, input, &output));
+    };
+
+    auto fillAndPostBuffers = [&](const Color& color) {
+        int slot1;
+        ASSERT_NO_FATAL_FAILURE(dequeue(&slot1));
+        int slot2;
+        ASSERT_NO_FATAL_FAILURE(dequeue(&slot2));
+
+        sp<GraphicBuffer> buf1;
+        ASSERT_NO_FATAL_FAILURE(slotToBuffer(slot1, &buf1));
+        sp<GraphicBuffer> buf2;
+        ASSERT_NO_FATAL_FAILURE(slotToBuffer(slot2, &buf2));
+        fillGraphicBufferColor(buf1, Rect(width, height), color);
+        fillGraphicBufferColor(buf2, Rect(width, height), color);
+
+        const auto displayTime = systemTime() + milliseconds_to_nanoseconds(100);
+        ASSERT_NO_FATAL_FAILURE(queue(slot1, Region::INVALID_REGION, displayTime));
+        ASSERT_NO_FATAL_FAILURE(
+                queue(slot2, Region(Rect(width / 3, height / 3, 2 * width / 3, 2 * height / 3)),
+                      displayTime));
+    };
+
+    const auto startTime = systemTime();
+    const std::array<Color, 3> colors = {Color::RED, Color::GREEN, Color::BLUE};
+    int colorIndex = 0;
+    while (nanoseconds_to_seconds(systemTime() - startTime) < 10) {
+        ASSERT_NO_FATAL_FAILURE(fillAndPostBuffers(colors[colorIndex++ % colors.size()]));
+        std::this_thread::sleep_for(1s);
+    }
+
+    ASSERT_EQ(OK, producer->disconnect(NATIVE_WINDOW_API_CPU));
+}
+
 } // namespace android