SF: Move/Refactor LayersNeedingFences

Refactors the logic for handling layers that are being released by the
current display refresh.

This is in preparation for moving the logic over to CompositionEngine.

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: I52725b1310ecb324e2c1367f0cbd2eddafacbc4a
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
index 591382d..5b9e282 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
@@ -46,6 +46,7 @@
 class Output {
 public:
     using OutputLayers = std::vector<std::unique_ptr<compositionengine::OutputLayer>>;
+    using ReleasedLayers = std::vector<wp<LayerFE>>;
 
     virtual ~Output();
 
@@ -131,6 +132,12 @@
     // Gets the ordered set of output layers for this output
     virtual const OutputLayers& getOutputLayersOrderedByZ() const = 0;
 
+    // Sets the new set of layers being released this frame.
+    virtual void setReleasedLayers(ReleasedLayers&&) = 0;
+
+    // Takes (moves) the set of layers being released this frame.
+    virtual ReleasedLayers takeReleasedLayers() = 0;
+
 protected:
     virtual void setDisplayColorProfile(std::unique_ptr<DisplayColorProfile>) = 0;
     virtual void setRenderSurface(std::unique_ptr<RenderSurface>) = 0;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
index f245936..20812d2 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
@@ -72,6 +72,9 @@
     void setOutputLayersOrderedByZ(OutputLayers&&) override;
     const OutputLayers& getOutputLayersOrderedByZ() const override;
 
+    void setReleasedLayers(ReleasedLayers&&) override;
+    ReleasedLayers takeReleasedLayers() override;
+
     // Testing
     void setDisplayColorProfileForTest(std::unique_ptr<compositionengine::DisplayColorProfile>);
     void setRenderSurfaceForTest(std::unique_ptr<compositionengine::RenderSurface>);
@@ -93,6 +96,7 @@
     std::unique_ptr<compositionengine::RenderSurface> mRenderSurface;
 
     OutputLayers mOutputLayersOrderedByZ;
+    ReleasedLayers mReleasedLayers;
 };
 
 } // namespace impl
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
index cf82107..924d72c 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
@@ -66,8 +66,12 @@
                  std::unique_ptr<compositionengine::OutputLayer>(
                          std::optional<DisplayId>, std::shared_ptr<compositionengine::Layer>,
                          sp<compositionengine::LayerFE>));
+
     MOCK_METHOD1(setOutputLayersOrderedByZ, void(OutputLayers&&));
     MOCK_CONST_METHOD0(getOutputLayersOrderedByZ, OutputLayers&());
+
+    MOCK_METHOD1(setReleasedLayers, void(ReleasedLayers&&));
+    MOCK_METHOD0(takeReleasedLayers, ReleasedLayers());
 };
 
 } // namespace android::compositionengine::mock
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 0725926..845e3c6 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -242,6 +242,14 @@
     return mOutputLayersOrderedByZ;
 }
 
+void Output::setReleasedLayers(Output::ReleasedLayers&& layers) {
+    mReleasedLayers = std::move(layers);
+}
+
+Output::ReleasedLayers Output::takeReleasedLayers() {
+    return std::move(mReleasedLayers);
+}
+
 void Output::dirtyEntireOutput() {
     mState.dirtyRegion.set(mState.bounds);
 }