Merge "Store a wp GraphicBuffer pointer instead of an sp on LayerState" into sc-dev
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/CachedSet.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/CachedSet.h
index fae17d9..056408e 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/CachedSet.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/CachedSet.h
@@ -40,7 +40,9 @@
         const LayerState* getState() const { return mState; }
         const std::string& getName() const { return mState->getName(); }
         Rect getDisplayFrame() const { return mState->getDisplayFrame(); }
-        const sp<GraphicBuffer>& getBuffer() const { return mState->getBuffer(); }
+        const sp<GraphicBuffer>& getBuffer() const {
+            return mState->getOutputLayer()->getLayerFE().getCompositionState()->buffer;
+        }
         int64_t getFramesSinceBufferUpdate() const { return mState->getFramesSinceBufferUpdate(); }
         NonBufferHash getHash() const { return mHash; }
         std::chrono::steady_clock::time_point getLastUpdate() const { return mLastUpdate; }
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
index a3beadc..d005ca3 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
@@ -32,6 +32,14 @@
 struct hash<android::sp<T>> {
     size_t operator()(const android::sp<T>& p) { return std::hash<void*>()(p.get()); }
 };
+
+template <typename T>
+struct hash<android::wp<T>> {
+    size_t operator()(const android::wp<T>& p) {
+        android::sp<T> promoted = p.promote();
+        return std::hash<void*>()(promoted ? promoted.get() : nullptr);
+    }
+};
 } // namespace std
 
 namespace android::compositionengine::impl::planner {
@@ -70,7 +78,7 @@
 
     virtual Flags<LayerStateField> update(const compositionengine::OutputLayer* layer) = 0;
 
-    virtual size_t getHash(Flags<LayerStateField> skipFields) const = 0;
+    virtual size_t getHash() const = 0;
 
     virtual LayerStateField getField() const = 0;
 
@@ -113,6 +121,10 @@
     // Returns this member's field flag if it was changed
     Flags<LayerStateField> update(const compositionengine::OutputLayer* layer) override {
         T newValue = mReader(layer);
+        return update(newValue);
+    }
+
+    Flags<LayerStateField> update(const T& newValue) {
         if (!mEquals(mValue, newValue)) {
             mValue = newValue;
             mHash = {};
@@ -124,10 +136,7 @@
     LayerStateField getField() const override { return FIELD; }
     const T& get() const { return mValue; }
 
-    size_t getHash(Flags<LayerStateField> skipFields) const override {
-        if (skipFields.test(FIELD)) {
-            return 0;
-        }
+    size_t getHash() const override {
         if (!mHash) {
             mHash = std::hash<T>{}(mValue);
         }
@@ -175,13 +184,13 @@
     Flags<LayerStateField> update(compositionengine::OutputLayer*);
 
     // Computes a hash for this LayerState.
-    // The hash is only computed from NonUniqueFields.
-    size_t getHash(Flags<LayerStateField> skipFields) const;
+    // The hash is only computed from NonUniqueFields, and excludes GraphicBuffers since they are
+    // not guaranteed to live longer than the LayerState object.
+    size_t getHash() const;
 
     // Returns the bit-set of differing fields between this LayerState and another LayerState.
-    // This bit-set is based on NonUniqueFields only
-    Flags<LayerStateField> getDifferingFields(const LayerState& other,
-                                              Flags<LayerStateField> skipFields) const;
+    // This bit-set is based on NonUniqueFields only, and excludes GraphicBuffers.
+    Flags<LayerStateField> getDifferingFields(const LayerState& other) const;
 
     compositionengine::OutputLayer* getOutputLayer() const { return mOutputLayer; }
     int32_t getId() const { return mId.get(); }
@@ -190,7 +199,6 @@
     hardware::graphics::composer::hal::Composition getCompositionType() const {
         return mCompositionType.get();
     }
-    const sp<GraphicBuffer>& getBuffer() const { return mBuffer.get(); }
 
     void incrementFramesSinceBufferUpdate() { ++mFramesSinceBufferUpdate; }
     void resetFramesSinceBufferUpdate() { mFramesSinceBufferUpdate = 0; }
@@ -311,10 +319,14 @@
                                 return std::vector<std::string>{base::StringPrintf("%p", p)};
                             }};
 
-    OutputLayerState<sp<GraphicBuffer>, LayerStateField::Buffer>
+    OutputLayerState<wp<GraphicBuffer>, LayerStateField::Buffer>
             mBuffer{[](auto layer) { return layer->getLayerFE().getCompositionState()->buffer; },
-                    [](const sp<GraphicBuffer>& buffer) {
-                        return std::vector<std::string>{base::StringPrintf("%p", buffer.get())};
+                    [](const wp<GraphicBuffer>& buffer) {
+                        sp<GraphicBuffer> promotedBuffer = buffer.promote();
+                        return std::vector<std::string>{
+                                base::StringPrintf("%p",
+                                                   promotedBuffer ? promotedBuffer.get()
+                                                                  : nullptr)};
                     }};
 
     int64_t mFramesSinceBufferUpdate = 0;
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp b/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
index b95a3db..f58addb 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
@@ -51,10 +51,10 @@
 }
 
 CachedSet::Layer::Layer(const LayerState* state, std::chrono::steady_clock::time_point lastUpdate)
-      : mState(state), mHash(state->getHash(LayerStateField::Buffer)), mLastUpdate(lastUpdate) {}
+      : mState(state), mHash(state->getHash()), mLastUpdate(lastUpdate) {}
 
 CachedSet::CachedSet(const LayerState* layer, std::chrono::steady_clock::time_point lastUpdate)
-      : mFingerprint(layer->getHash(LayerStateField::Buffer)), mLastUpdate(lastUpdate) {
+      : mFingerprint(layer->getHash()), mLastUpdate(lastUpdate) {
     addLayer(layer, lastUpdate);
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp b/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
index 439cfb3..aae49de 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
@@ -193,9 +193,7 @@
     auto currentLayerIter = mLayers.begin();
     auto incomingLayerIter = layers.begin();
     while (incomingLayerIter != layers.end()) {
-        if (mNewCachedSet &&
-            mNewCachedSet->getFingerprint() ==
-                    (*incomingLayerIter)->getHash(LayerStateField::Buffer)) {
+        if (mNewCachedSet && mNewCachedSet->getFingerprint() == (*incomingLayerIter)->getHash()) {
             if (mNewCachedSet->hasBufferUpdate()) {
                 ALOGV("[%s] Dropping new cached set", __func__);
                 ++mInvalidatedCachedSetAges[0];
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp b/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
index 222b2be..e976c9b 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
@@ -58,24 +58,24 @@
     return differences;
 }
 
-size_t LayerState::getHash(
-        Flags<LayerStateField> skipFields = static_cast<LayerStateField>(0)) const {
+size_t LayerState::getHash() const {
     size_t hash = 0;
     for (const StateInterface* field : getNonUniqueFields()) {
-        android::hashCombineSingleHashed(hash, field->getHash(skipFields));
+        if (field->getField() == LayerStateField::Buffer) {
+            continue;
+        }
+        android::hashCombineSingleHashed(hash, field->getHash());
     }
 
     return hash;
 }
 
-Flags<LayerStateField> LayerState::getDifferingFields(
-        const LayerState& other,
-        Flags<LayerStateField> skipFields = static_cast<LayerStateField>(0)) const {
+Flags<LayerStateField> LayerState::getDifferingFields(const LayerState& other) const {
     Flags<LayerStateField> differences;
     auto myFields = getNonUniqueFields();
     auto otherFields = other.getNonUniqueFields();
     for (size_t i = 0; i < myFields.size(); ++i) {
-        if (skipFields.test(myFields[i]->getField())) {
+        if (myFields[i]->getField() == LayerStateField::Buffer) {
             continue;
         }
 
@@ -169,7 +169,7 @@
 NonBufferHash getNonBufferHash(const std::vector<const LayerState*>& layers) {
     size_t hash = 0;
     for (const auto layer : layers) {
-        android::hashCombineSingleHashed(hash, layer->getHash(LayerStateField::Buffer));
+        android::hashCombineSingleHashed(hash, layer->getHash());
     }
 
     return hash;
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/Predictor.cpp b/services/surfaceflinger/CompositionEngine/src/planner/Predictor.cpp
index 07920b8..8226ef7 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/Predictor.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/Predictor.cpp
@@ -33,8 +33,7 @@
     std::optional<ApproximateMatch> approximateMatch = {};
     for (size_t i = 0; i < mLayers.size(); ++i) {
         // Skip identical layers
-        if (mLayers[i].getHash(LayerStateField::Buffer) ==
-            other[i]->getHash(LayerStateField::Buffer)) {
+        if (mLayers[i].getHash() == other[i]->getHash()) {
             continue;
         }
 
@@ -56,8 +55,7 @@
             return std::nullopt;
         }
 
-        Flags<LayerStateField> differingFields =
-                mLayers[i].getDifferingFields(*other[i], LayerStateField::Buffer);
+        Flags<LayerStateField> differingFields = mLayers[i].getDifferingFields(*other[i]);
 
         // If we don't find an approximate match on this layer, then the LayerStacks differ
         // by too much, so return nothing
diff --git a/services/surfaceflinger/CompositionEngine/tests/planner/LayerStateTest.cpp b/services/surfaceflinger/CompositionEngine/tests/planner/LayerStateTest.cpp
index 8f235ab..d5a7234 100644
--- a/services/surfaceflinger/CompositionEngine/tests/planner/LayerStateTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/planner/LayerStateTest.cpp
@@ -129,20 +129,13 @@
     EXPECT_NE(mLayerState->getId(), otherLayerState->getId());
 
     // Id is a unique field, so it's not computed in the hash for a layer state.
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::Id),
-              otherLayerState->getHash(LayerStateField::Id));
+    EXPECT_EQ(mLayerState->getHash(), otherLayerState->getHash());
 
     // Similarly, Id cannot be included in differing fields.
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::Id));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::Id));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_FALSE(mLayerState->compare(*otherLayerState));
     EXPECT_FALSE(otherLayerState->compare(*mLayerState));
@@ -188,20 +181,13 @@
     EXPECT_NE(mLayerState->getName(), otherLayerState->getName());
 
     // Name is a unique field, so it's not computed in the hash for a layer state.
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::Name),
-              otherLayerState->getHash(LayerStateField::Name));
+    EXPECT_EQ(mLayerState->getHash(), otherLayerState->getHash());
 
     // Similarly, Name cannot be included in differing fields.
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::Name));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::Name));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_FALSE(mLayerState->compare(*otherLayerState));
     EXPECT_FALSE(otherLayerState->compare(*mLayerState));
@@ -253,19 +239,12 @@
 
     EXPECT_NE(mLayerState->getDisplayFrame(), otherLayerState->getDisplayFrame());
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::DisplayFrame),
-              otherLayerState->getHash(LayerStateField::DisplayFrame));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::DisplayFrame),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::DisplayFrame));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::DisplayFrame),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::DisplayFrame));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -337,34 +316,17 @@
 
     EXPECT_NE(mLayerState->getCompositionType(), otherLayerState->getCompositionType());
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::CompositionType),
-              otherLayerState->getHash(LayerStateField::CompositionType));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::CompositionType),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::CompositionType));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::CompositionType),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::CompositionType));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
 }
 
-TEST_F(LayerStateTest, getBuffer) {
-    OutputLayerCompositionState outputLayerCompositionState;
-    LayerFECompositionState layerFECompositionState;
-    layerFECompositionState.buffer = new GraphicBuffer();
-    setupMocksForLayer(mOutputLayer, mLayerFE, outputLayerCompositionState,
-                       layerFECompositionState);
-    mLayerState = std::make_unique<LayerState>(&mOutputLayer);
-    EXPECT_EQ(layerFECompositionState.buffer, mLayerState->getBuffer());
-}
-
 TEST_F(LayerStateTest, updateBuffer) {
     OutputLayerCompositionState outputLayerCompositionState;
     LayerFECompositionState layerFECompositionState;
@@ -380,7 +342,6 @@
     setupMocksForLayer(newOutputLayer, newLayerFE, outputLayerCompositionState,
                        layerFECompositionStateTwo);
     Flags<LayerStateField> updates = mLayerState->update(&newOutputLayer);
-    EXPECT_EQ(layerFECompositionStateTwo.buffer, mLayerState->getBuffer());
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Buffer), updates);
 }
 
@@ -399,21 +360,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getBuffer(), otherLayerState->getBuffer());
-
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::Buffer),
-              otherLayerState->getHash(LayerStateField::Buffer));
-
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Buffer),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
+    // Buffers are not included in differing fields or in hashes.
+    EXPECT_EQ(mLayerState->getHash(), otherLayerState->getHash());
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::Buffer));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Buffer),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::Buffer));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     // Buffers are explicitly excluded from comparison
     EXPECT_FALSE(mLayerState->compare(*otherLayerState));
@@ -453,19 +405,12 @@
                        layerFECompositionState);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::SourceCrop),
-              otherLayerState->getHash(LayerStateField::SourceCrop));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SourceCrop),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::SourceCrop));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SourceCrop),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::SourceCrop));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -504,19 +449,12 @@
                        layerFECompositionState);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::ZOrder),
-              otherLayerState->getHash(LayerStateField::ZOrder));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::ZOrder),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::ZOrder));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::ZOrder),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::ZOrder));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -555,19 +493,12 @@
                        layerFECompositionState);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::BufferTransform),
-              otherLayerState->getHash(LayerStateField::BufferTransform));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::BufferTransform),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::BufferTransform));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::BufferTransform),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::BufferTransform));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -606,19 +537,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::BlendMode),
-              otherLayerState->getHash(LayerStateField::BlendMode));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::BlendMode),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::BlendMode));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::BlendMode),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::BlendMode));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -657,19 +581,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::Alpha),
-              otherLayerState->getHash(LayerStateField::Alpha));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Alpha),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::Alpha));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Alpha),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::Alpha));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -708,19 +625,12 @@
                        layerFECompositionState);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::VisibleRegion),
-              otherLayerState->getHash(LayerStateField::VisibleRegion));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::VisibleRegion),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::VisibleRegion));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::VisibleRegion),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::VisibleRegion));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -759,19 +669,12 @@
                        layerFECompositionState);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::Dataspace),
-              otherLayerState->getHash(LayerStateField::Dataspace));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Dataspace),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::Dataspace));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::Dataspace),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::Dataspace));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -814,19 +717,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::ColorTransform),
-              otherLayerState->getHash(LayerStateField::ColorTransform));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::ColorTransform),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::ColorTransform));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::ColorTransform),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::ColorTransform));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -865,19 +761,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::SidebandStream),
-              otherLayerState->getHash(LayerStateField::SidebandStream));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SidebandStream),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::SidebandStream));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SidebandStream),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::SidebandStream));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));
@@ -916,19 +805,12 @@
                        layerFECompositionStateTwo);
     auto otherLayerState = std::make_unique<LayerState>(&newOutputLayer);
 
-    EXPECT_NE(mLayerState->getHash(LayerStateField::None),
-              otherLayerState->getHash(LayerStateField::None));
-    EXPECT_EQ(mLayerState->getHash(LayerStateField::SolidColor),
-              otherLayerState->getHash(LayerStateField::SolidColor));
+    EXPECT_NE(mLayerState->getHash(), otherLayerState->getHash());
 
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SolidColor),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              mLayerState->getDifferingFields(*otherLayerState, LayerStateField::SolidColor));
+              mLayerState->getDifferingFields(*otherLayerState));
     EXPECT_EQ(Flags<LayerStateField>(LayerStateField::SolidColor),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::None));
-    EXPECT_EQ(Flags<LayerStateField>(LayerStateField::None),
-              otherLayerState->getDifferingFields(*mLayerState, LayerStateField::SolidColor));
+              otherLayerState->getDifferingFields(*mLayerState));
 
     EXPECT_TRUE(mLayerState->compare(*otherLayerState));
     EXPECT_TRUE(otherLayerState->compare(*mLayerState));