services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp

/*
 * Copyright 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <cmath>

#include <compositionengine/LayerFECompositionState.h>
#include <compositionengine/impl/Output.h>
#include <compositionengine/impl/OutputCompositionState.h>
#include <compositionengine/impl/OutputLayerCompositionState.h>
#include <compositionengine/mock/CompositionEngine.h>
#include <compositionengine/mock/DisplayColorProfile.h>
#include <compositionengine/mock/Layer.h>
#include <compositionengine/mock/LayerFE.h>
#include <compositionengine/mock/OutputLayer.h>
#include <compositionengine/mock/RenderSurface.h>
#include <gtest/gtest.h>
#include <renderengine/mock/RenderEngine.h>
#include <ui/Rect.h>
#include <ui/Region.h>

#include "RegionMatcher.h"
#include "TransformMatcher.h"

namespace android::compositionengine {
namespace {

using testing::_;
using testing::InSequence;
using testing::Ref;
using testing::Return;
using testing::ReturnRef;
using testing::StrictMock;

constexpr auto TR_IDENT = 0u;
constexpr auto TR_ROT_90 = HAL_TRANSFORM_ROT_90;

const mat4 kIdentity;
const mat4 kNonIdentityHalf = mat4() * 0.5;
const mat4 kNonIdentityQuarter = mat4() * 0.25;

struct OutputPartialMockBase : public impl::Output {
    // compositionengine::Output overrides
    const OutputCompositionState& getState() const override { return mState; }
    OutputCompositionState& editState() override { return mState; }

    // Use mocks for all the remaining virtual functions
    // not implemented by the base implementation class.
    MOCK_CONST_METHOD0(getOutputLayerCount, size_t());
    MOCK_CONST_METHOD1(getOutputLayerOrderedByZByIndex, compositionengine::OutputLayer*(size_t));
    MOCK_METHOD3(ensureOutputLayer,
                 compositionengine::OutputLayer*(std::optional<size_t>,
                                                 const std::shared_ptr<compositionengine::Layer>&,
                                                 const sp<LayerFE>&));
    MOCK_METHOD0(finalizePendingOutputLayers, void());
    MOCK_METHOD0(clearOutputLayers, void());
    MOCK_CONST_METHOD1(dumpState, void(std::string&));
    MOCK_CONST_METHOD0(getCompositionEngine, const CompositionEngine&());
    MOCK_METHOD2(injectOutputLayerForTest,
                 compositionengine::OutputLayer*(const std::shared_ptr<compositionengine::Layer>&,
                                                 const sp<LayerFE>&));
    MOCK_METHOD1(injectOutputLayerForTest, void(std::unique_ptr<OutputLayer>));

    impl::OutputCompositionState mState;
};

struct OutputTest : public testing::Test {
    class Output : public impl::Output {
    public:
        using impl::Output::injectOutputLayerForTest;
        virtual void injectOutputLayerForTest(std::unique_ptr<compositionengine::OutputLayer>) = 0;
    };

    static std::shared_ptr<Output> createOutput(
            const compositionengine::CompositionEngine& compositionEngine) {
        return impl::createOutputTemplated<Output>(compositionEngine);
    }

    OutputTest() {
        mOutput->setDisplayColorProfileForTest(
                std::unique_ptr<DisplayColorProfile>(mDisplayColorProfile));
        mOutput->setRenderSurfaceForTest(std::unique_ptr<RenderSurface>(mRenderSurface));

        mOutput->editState().bounds = kDefaultDisplaySize;
    }

    static const Rect kDefaultDisplaySize;

    StrictMock<mock::CompositionEngine> mCompositionEngine;
    mock::DisplayColorProfile* mDisplayColorProfile = new StrictMock<mock::DisplayColorProfile>();
    mock::RenderSurface* mRenderSurface = new StrictMock<mock::RenderSurface>();
    std::shared_ptr<Output> mOutput = createOutput(mCompositionEngine);
};

// Extension of the base test useful for checking interactions with the LayerFE
// functions to latch composition state.
struct OutputLatchFEStateTest : public OutputTest {
    OutputLatchFEStateTest() {
        EXPECT_CALL(*mOutputLayer1, getLayer()).WillRepeatedly(ReturnRef(mLayer1));
        EXPECT_CALL(*mOutputLayer2, getLayer()).WillRepeatedly(ReturnRef(mLayer2));
        EXPECT_CALL(*mOutputLayer3, getLayer()).WillRepeatedly(ReturnRef(mLayer3));

        EXPECT_CALL(*mOutputLayer1, getLayerFE()).WillRepeatedly(ReturnRef(mLayer1FE));
        EXPECT_CALL(*mOutputLayer2, getLayerFE()).WillRepeatedly(ReturnRef(mLayer2FE));
        EXPECT_CALL(*mOutputLayer3, getLayerFE()).WillRepeatedly(ReturnRef(mLayer3FE));

        EXPECT_CALL(mLayer1, editFEState()).WillRepeatedly(ReturnRef(mLayer1FEState));
        EXPECT_CALL(mLayer2, editFEState()).WillRepeatedly(ReturnRef(mLayer2FEState));
        EXPECT_CALL(mLayer3, editFEState()).WillRepeatedly(ReturnRef(mLayer3FEState));
    }

    void injectLayer(std::unique_ptr<mock::OutputLayer> layer) {
        mOutput->injectOutputLayerForTest(std::unique_ptr<OutputLayer>(layer.release()));
    }

    std::unique_ptr<mock::OutputLayer> mOutputLayer1{new StrictMock<mock::OutputLayer>};
    std::unique_ptr<mock::OutputLayer> mOutputLayer2{new StrictMock<mock::OutputLayer>};
    std::unique_ptr<mock::OutputLayer> mOutputLayer3{new StrictMock<mock::OutputLayer>};

    StrictMock<mock::Layer> mLayer1;
    StrictMock<mock::Layer> mLayer2;
    StrictMock<mock::Layer> mLayer3;

    StrictMock<mock::LayerFE> mLayer1FE;
    StrictMock<mock::LayerFE> mLayer2FE;
    StrictMock<mock::LayerFE> mLayer3FE;

    LayerFECompositionState mLayer1FEState;
    LayerFECompositionState mLayer2FEState;
    LayerFECompositionState mLayer3FEState;
};

const Rect OutputTest::kDefaultDisplaySize{100, 200};

/*
 * Basic construction
 */

TEST_F(OutputTest, canInstantiateOutput) {
    // The validation check checks each required component.
    EXPECT_CALL(*mDisplayColorProfile, isValid()).WillOnce(Return(true));
    EXPECT_CALL(*mRenderSurface, isValid()).WillOnce(Return(true));

    EXPECT_TRUE(mOutput->isValid());

    // If we take away the required components, it is no longer valid.
    mOutput->setRenderSurfaceForTest(std::unique_ptr<RenderSurface>());

    EXPECT_CALL(*mDisplayColorProfile, isValid()).WillOnce(Return(true));

    EXPECT_FALSE(mOutput->isValid());
}

/*
 * Output::setCompositionEnabled()
 */

TEST_F(OutputTest, setCompositionEnabledDoesNothingIfAlreadyEnabled) {
    mOutput->editState().isEnabled = true;

    mOutput->setCompositionEnabled(true);

    EXPECT_TRUE(mOutput->getState().isEnabled);
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region()));
}

TEST_F(OutputTest, setCompositionEnabledSetsEnabledAndDirtiesEntireOutput) {
    mOutput->editState().isEnabled = false;

    mOutput->setCompositionEnabled(true);

    EXPECT_TRUE(mOutput->getState().isEnabled);
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

TEST_F(OutputTest, setCompositionEnabledSetsDisabledAndDirtiesEntireOutput) {
    mOutput->editState().isEnabled = true;

    mOutput->setCompositionEnabled(false);

    EXPECT_FALSE(mOutput->getState().isEnabled);
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

/*
 * Output::setProjection()
 */

TEST_F(OutputTest, setProjectionTriviallyWorks) {
    const ui::Transform transform{ui::Transform::ROT_180};
    const int32_t orientation = 123;
    const Rect frame{1, 2, 3, 4};
    const Rect viewport{5, 6, 7, 8};
    const Rect scissor{9, 10, 11, 12};
    const bool needsFiltering = true;

    mOutput->setProjection(transform, orientation, frame, viewport, scissor, needsFiltering);

    EXPECT_THAT(mOutput->getState().transform, TransformEq(transform));
    EXPECT_EQ(orientation, mOutput->getState().orientation);
    EXPECT_EQ(frame, mOutput->getState().frame);
    EXPECT_EQ(viewport, mOutput->getState().viewport);
    EXPECT_EQ(scissor, mOutput->getState().scissor);
    EXPECT_EQ(needsFiltering, mOutput->getState().needsFiltering);
}

/*
 * Output::setBounds()
 */

TEST_F(OutputTest, setBoundsSetsSizeAndDirtiesEntireOutput) {
    const ui::Size displaySize{200, 400};

    EXPECT_CALL(*mRenderSurface, setDisplaySize(displaySize)).Times(1);
    EXPECT_CALL(*mRenderSurface, getSize()).WillOnce(ReturnRef(displaySize));

    mOutput->setBounds(displaySize);

    EXPECT_EQ(Rect(displaySize), mOutput->getState().bounds);

    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(Rect(displaySize))));
}

/*
 * Output::setLayerStackFilter()
 */

TEST_F(OutputTest, setLayerStackFilterSetsFilterAndDirtiesEntireOutput) {
    const uint32_t layerStack = 123u;
    mOutput->setLayerStackFilter(layerStack, true);

    EXPECT_TRUE(mOutput->getState().layerStackInternal);
    EXPECT_EQ(layerStack, mOutput->getState().layerStackId);

    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

/*
 * Output::setColorTransform
 */

TEST_F(OutputTest, setColorTransformWithNoChangeFlaggedSkipsUpdates) {
    mOutput->editState().colorTransformMatrix = kIdentity;

    // If no colorTransformMatrix is set the update should be skipped.
    CompositionRefreshArgs refreshArgs;
    refreshArgs.colorTransformMatrix = std::nullopt;

    mOutput->setColorTransform(refreshArgs);

    // The internal state should be unchanged
    EXPECT_EQ(kIdentity, mOutput->getState().colorTransformMatrix);

    // No dirty region should be set
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region()));
}

TEST_F(OutputTest, setColorTransformWithNoActualChangeSkipsUpdates) {
    mOutput->editState().colorTransformMatrix = kIdentity;

    // Attempting to set the same colorTransformMatrix that is already set should
    // also skip the update.
    CompositionRefreshArgs refreshArgs;
    refreshArgs.colorTransformMatrix = kIdentity;

    mOutput->setColorTransform(refreshArgs);

    // The internal state should be unchanged
    EXPECT_EQ(kIdentity, mOutput->getState().colorTransformMatrix);

    // No dirty region should be set
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region()));
}

TEST_F(OutputTest, setColorTransformPerformsUpdateToIdentity) {
    mOutput->editState().colorTransformMatrix = kNonIdentityHalf;

    // Setting a different colorTransformMatrix should perform the update.
    CompositionRefreshArgs refreshArgs;
    refreshArgs.colorTransformMatrix = kIdentity;

    mOutput->setColorTransform(refreshArgs);

    // The internal state should have been updated
    EXPECT_EQ(kIdentity, mOutput->getState().colorTransformMatrix);

    // The dirtyRegion should be set to the full display size
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

TEST_F(OutputTest, setColorTransformPerformsUpdateForIdentityToHalf) {
    mOutput->editState().colorTransformMatrix = kIdentity;

    // Setting a different colorTransformMatrix should perform the update.
    CompositionRefreshArgs refreshArgs;
    refreshArgs.colorTransformMatrix = kNonIdentityHalf;

    mOutput->setColorTransform(refreshArgs);

    // The internal state should have been updated
    EXPECT_EQ(kNonIdentityHalf, mOutput->getState().colorTransformMatrix);

    // The dirtyRegion should be set to the full display size
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

TEST_F(OutputTest, setColorTransformPerformsUpdateForHalfToQuarter) {
    mOutput->editState().colorTransformMatrix = kNonIdentityHalf;

    // Setting a different colorTransformMatrix should perform the update.
    CompositionRefreshArgs refreshArgs;
    refreshArgs.colorTransformMatrix = kNonIdentityQuarter;

    mOutput->setColorTransform(refreshArgs);

    // The internal state should have been updated
    EXPECT_EQ(kNonIdentityQuarter, mOutput->getState().colorTransformMatrix);

    // The dirtyRegion should be set to the full display size
    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

/*
 * Output::setColorMode
 */

TEST_F(OutputTest, setColorModeSetsStateAndDirtiesOutputIfChanged) {
    using ColorProfile = Output::ColorProfile;

    EXPECT_CALL(*mDisplayColorProfile,
                getTargetDataspace(ui::ColorMode::DISPLAY_P3, ui::Dataspace::DISPLAY_P3,
                                   ui::Dataspace::UNKNOWN))
            .WillOnce(Return(ui::Dataspace::UNKNOWN));
    EXPECT_CALL(*mRenderSurface, setBufferDataspace(ui::Dataspace::DISPLAY_P3)).Times(1);

    mOutput->setColorProfile(ColorProfile{ui::ColorMode::DISPLAY_P3, ui::Dataspace::DISPLAY_P3,
                                          ui::RenderIntent::TONE_MAP_COLORIMETRIC,
                                          ui::Dataspace::UNKNOWN});

    EXPECT_EQ(ui::ColorMode::DISPLAY_P3, mOutput->getState().colorMode);
    EXPECT_EQ(ui::Dataspace::DISPLAY_P3, mOutput->getState().dataspace);
    EXPECT_EQ(ui::RenderIntent::TONE_MAP_COLORIMETRIC, mOutput->getState().renderIntent);
    EXPECT_EQ(ui::Dataspace::UNKNOWN, mOutput->getState().targetDataspace);

    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region(kDefaultDisplaySize)));
}

TEST_F(OutputTest, setColorModeDoesNothingIfNoChange) {
    using ColorProfile = Output::ColorProfile;

    EXPECT_CALL(*mDisplayColorProfile,
                getTargetDataspace(ui::ColorMode::DISPLAY_P3, ui::Dataspace::DISPLAY_P3,
                                   ui::Dataspace::UNKNOWN))
            .WillOnce(Return(ui::Dataspace::UNKNOWN));

    mOutput->editState().colorMode = ui::ColorMode::DISPLAY_P3;
    mOutput->editState().dataspace = ui::Dataspace::DISPLAY_P3;
    mOutput->editState().renderIntent = ui::RenderIntent::TONE_MAP_COLORIMETRIC;
    mOutput->editState().targetDataspace = ui::Dataspace::UNKNOWN;

    mOutput->setColorProfile(ColorProfile{ui::ColorMode::DISPLAY_P3, ui::Dataspace::DISPLAY_P3,
                                          ui::RenderIntent::TONE_MAP_COLORIMETRIC,
                                          ui::Dataspace::UNKNOWN});

    EXPECT_THAT(mOutput->getState().dirtyRegion, RegionEq(Region()));
}

/*
 * Output::setRenderSurface()
 */

TEST_F(OutputTest, setRenderSurfaceResetsBounds) {
    const ui::Size newDisplaySize{640, 480};

    mock::RenderSurface* renderSurface = new StrictMock<mock::RenderSurface>();
    EXPECT_CALL(*renderSurface, getSize()).WillOnce(ReturnRef(newDisplaySize));

    mOutput->setRenderSurface(std::unique_ptr<RenderSurface>(renderSurface));

    EXPECT_EQ(Rect(newDisplaySize), mOutput->getState().bounds);
}

/*
 * Output::getDirtyRegion()
 */

TEST_F(OutputTest, getDirtyRegionWithRepaintEverythingTrue) {
    const Rect viewport{100, 200};
    mOutput->editState().viewport = viewport;
    mOutput->editState().dirtyRegion.set(50, 300);

    {
        Region result = mOutput->getDirtyRegion(true);

        EXPECT_THAT(result, RegionEq(Region(viewport)));
    }
}

TEST_F(OutputTest, getDirtyRegionWithRepaintEverythingFalse) {
    const Rect viewport{100, 200};
    mOutput->editState().viewport = viewport;
    mOutput->editState().dirtyRegion.set(50, 300);

    {
        Region result = mOutput->getDirtyRegion(false);

        // The dirtyRegion should be clipped to the display bounds.
        EXPECT_THAT(result, RegionEq(Region(Rect(50, 200))));
    }
}

/*
 * Output::belongsInOutput()
 */

TEST_F(OutputTest, belongsInOutputFiltersAsExpected) {
    const uint32_t layerStack1 = 123u;
    const uint32_t layerStack2 = 456u;

    // If the output accepts layerStack1 and internal-only layers....
    mOutput->setLayerStackFilter(layerStack1, true);

    // A layer with no layerStack does not belong to it, internal-only or not.
    EXPECT_FALSE(mOutput->belongsInOutput(std::nullopt, false));
    EXPECT_FALSE(mOutput->belongsInOutput(std::nullopt, true));

    // Any layer with layerStack1 belongs to it, internal-only or not.
    EXPECT_TRUE(mOutput->belongsInOutput(layerStack1, false));
    EXPECT_TRUE(mOutput->belongsInOutput(layerStack1, true));
    EXPECT_FALSE(mOutput->belongsInOutput(layerStack2, true));
    EXPECT_FALSE(mOutput->belongsInOutput(layerStack2, false));

    // If the output accepts layerStack21 but not internal-only layers...
    mOutput->setLayerStackFilter(layerStack1, false);

    // Only non-internal layers with layerStack1 belong to it.
    EXPECT_TRUE(mOutput->belongsInOutput(layerStack1, false));
    EXPECT_FALSE(mOutput->belongsInOutput(layerStack1, true));
    EXPECT_FALSE(mOutput->belongsInOutput(layerStack2, true));
    EXPECT_FALSE(mOutput->belongsInOutput(layerStack2, false));
}

TEST_F(OutputTest, belongsInOutputFiltersLayersAsExpected) {
    StrictMock<mock::Layer> layer;
    LayerFECompositionState layerFEState;

    EXPECT_CALL(layer, getFEState()).WillRepeatedly(ReturnRef(layerFEState));

    const uint32_t layerStack1 = 123u;
    const uint32_t layerStack2 = 456u;

    // If the output accepts layerStack1 and internal-only layers....
    mOutput->setLayerStackFilter(layerStack1, true);

    // A null layer pointer does not belong to the output
    EXPECT_FALSE(mOutput->belongsInOutput(nullptr));

    // A layer with no layerStack does not belong to it, internal-only or not.
    layerFEState.layerStackId = std::nullopt;
    layerFEState.internalOnly = false;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = std::nullopt;
    layerFEState.internalOnly = true;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    // Any layer with layerStack1 belongs to it, internal-only or not.
    layerFEState.layerStackId = layerStack1;
    layerFEState.internalOnly = false;
    EXPECT_TRUE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack1;
    layerFEState.internalOnly = true;
    EXPECT_TRUE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack2;
    layerFEState.internalOnly = true;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack2;
    layerFEState.internalOnly = false;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    // If the output accepts layerStack1 but not internal-only layers...
    mOutput->setLayerStackFilter(layerStack1, false);

    // A null layer pointer does not belong to the output
    EXPECT_FALSE(mOutput->belongsInOutput(nullptr));

    // Only non-internal layers with layerStack1 belong to it.
    layerFEState.layerStackId = layerStack1;
    layerFEState.internalOnly = false;
    EXPECT_TRUE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack1;
    layerFEState.internalOnly = true;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack2;
    layerFEState.internalOnly = true;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));

    layerFEState.layerStackId = layerStack2;
    layerFEState.internalOnly = false;
    EXPECT_FALSE(mOutput->belongsInOutput(&layer));
}

/*
 * Output::getOutputLayerForLayer()
 */

TEST_F(OutputTest, getOutputLayerForLayerWorks) {
    mock::OutputLayer* outputLayer1 = new StrictMock<mock::OutputLayer>();
    mock::OutputLayer* outputLayer2 = new StrictMock<mock::OutputLayer>();

    mOutput->injectOutputLayerForTest(std::unique_ptr<OutputLayer>(outputLayer1));
    mOutput->injectOutputLayerForTest(nullptr);
    mOutput->injectOutputLayerForTest(std::unique_ptr<OutputLayer>(outputLayer2));

    StrictMock<mock::Layer> layer;
    StrictMock<mock::Layer> otherLayer;

    // If the input layer matches the first OutputLayer, it will be returned.
    EXPECT_CALL(*outputLayer1, getLayer()).WillOnce(ReturnRef(layer));
    EXPECT_EQ(outputLayer1, mOutput->getOutputLayerForLayer(&layer));

    // If the input layer matches the second OutputLayer, it will be returned.
    EXPECT_CALL(*outputLayer1, getLayer()).WillOnce(ReturnRef(otherLayer));
    EXPECT_CALL(*outputLayer2, getLayer()).WillOnce(ReturnRef(layer));
    EXPECT_EQ(outputLayer2, mOutput->getOutputLayerForLayer(&layer));

    // If the input layer does not match an output layer, null will be returned.
    EXPECT_CALL(*outputLayer1, getLayer()).WillOnce(ReturnRef(otherLayer));
    EXPECT_CALL(*outputLayer2, getLayer()).WillOnce(ReturnRef(otherLayer));
    EXPECT_EQ(nullptr, mOutput->getOutputLayerForLayer(&layer));
}

/*
 * Output::setReleasedLayers()
 */

using OutputSetReleasedLayersTest = OutputTest;

TEST_F(OutputSetReleasedLayersTest, setReleasedLayersTakesGivenLayers) {
    sp<StrictMock<mock::LayerFE>> layer1FE{new StrictMock<mock::LayerFE>()};
    sp<StrictMock<mock::LayerFE>> layer2FE{new StrictMock<mock::LayerFE>()};
    sp<StrictMock<mock::LayerFE>> layer3FE{new StrictMock<mock::LayerFE>()};

    Output::ReleasedLayers layers;
    layers.push_back(layer1FE);
    layers.push_back(layer2FE);
    layers.push_back(layer3FE);

    mOutput->setReleasedLayers(std::move(layers));

    const auto& setLayers = mOutput->getReleasedLayersForTest();
    ASSERT_EQ(3u, setLayers.size());
    ASSERT_EQ(layer1FE.get(), setLayers[0].promote().get());
    ASSERT_EQ(layer2FE.get(), setLayers[1].promote().get());
    ASSERT_EQ(layer3FE.get(), setLayers[2].promote().get());
}

/*
 * Output::updateLayerStateFromFE()
 */

using OutputUpdateLayerStateFromFETest = OutputLatchFEStateTest;

TEST_F(OutputUpdateLayerStateFromFETest, handlesNoOutputLayerCase) {
    CompositionRefreshArgs refreshArgs;

    mOutput->updateLayerStateFromFE(refreshArgs);
}

TEST_F(OutputUpdateLayerStateFromFETest, latchesContentStateForAllContainedLayers) {
    EXPECT_CALL(mLayer1FE,
                latchCompositionState(Ref(mLayer1FEState), LayerFE::StateSubset::Content));
    EXPECT_CALL(mLayer2FE,
                latchCompositionState(Ref(mLayer2FEState), LayerFE::StateSubset::Content));
    EXPECT_CALL(mLayer3FE,
                latchCompositionState(Ref(mLayer3FEState), LayerFE::StateSubset::Content));

    // Note: Must be performed after any expectations on these mocks
    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    CompositionRefreshArgs refreshArgs;
    refreshArgs.updatingGeometryThisFrame = false;

    mOutput->updateLayerStateFromFE(refreshArgs);
}

TEST_F(OutputUpdateLayerStateFromFETest, latchesGeometryAndContentStateForAllContainedLayers) {
    EXPECT_CALL(mLayer1FE,
                latchCompositionState(Ref(mLayer1FEState),
                                      LayerFE::StateSubset::GeometryAndContent));
    EXPECT_CALL(mLayer2FE,
                latchCompositionState(Ref(mLayer2FEState),
                                      LayerFE::StateSubset::GeometryAndContent));
    EXPECT_CALL(mLayer3FE,
                latchCompositionState(Ref(mLayer3FEState),
                                      LayerFE::StateSubset::GeometryAndContent));

    // Note: Must be performed after any expectations on these mocks
    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    CompositionRefreshArgs refreshArgs;
    refreshArgs.updatingGeometryThisFrame = true;

    mOutput->updateLayerStateFromFE(refreshArgs);
}

/*
 * Output::updateAndWriteCompositionState()
 */

using OutputUpdateAndWriteCompositionStateTest = OutputLatchFEStateTest;

TEST_F(OutputUpdateAndWriteCompositionStateTest, doesNothingIfLayers) {
    mOutput->editState().isEnabled = true;

    CompositionRefreshArgs args;
    mOutput->updateAndWriteCompositionState(args);
}

TEST_F(OutputUpdateAndWriteCompositionStateTest, doesNothingIfOutputNotEnabled) {
    mOutput->editState().isEnabled = false;

    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    CompositionRefreshArgs args;
    mOutput->updateAndWriteCompositionState(args);
}

TEST_F(OutputUpdateAndWriteCompositionStateTest, updatesLayerContentForAllLayers) {
    EXPECT_CALL(*mOutputLayer1, updateCompositionState(false, false));
    EXPECT_CALL(*mOutputLayer1, writeStateToHWC(false));
    EXPECT_CALL(*mOutputLayer2, updateCompositionState(false, false));
    EXPECT_CALL(*mOutputLayer2, writeStateToHWC(false));
    EXPECT_CALL(*mOutputLayer3, updateCompositionState(false, false));
    EXPECT_CALL(*mOutputLayer3, writeStateToHWC(false));

    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    mOutput->editState().isEnabled = true;

    CompositionRefreshArgs args;
    args.updatingGeometryThisFrame = false;
    args.devOptForceClientComposition = false;
    mOutput->updateAndWriteCompositionState(args);
}

TEST_F(OutputUpdateAndWriteCompositionStateTest, updatesLayerGeometryAndContentForAllLayers) {
    EXPECT_CALL(*mOutputLayer1, updateCompositionState(true, false));
    EXPECT_CALL(*mOutputLayer1, writeStateToHWC(true));
    EXPECT_CALL(*mOutputLayer2, updateCompositionState(true, false));
    EXPECT_CALL(*mOutputLayer2, writeStateToHWC(true));
    EXPECT_CALL(*mOutputLayer3, updateCompositionState(true, false));
    EXPECT_CALL(*mOutputLayer3, writeStateToHWC(true));

    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    mOutput->editState().isEnabled = true;

    CompositionRefreshArgs args;
    args.updatingGeometryThisFrame = true;
    args.devOptForceClientComposition = false;
    mOutput->updateAndWriteCompositionState(args);
}

TEST_F(OutputUpdateAndWriteCompositionStateTest, forcesClientCompositionForAllLayers) {
    EXPECT_CALL(*mOutputLayer1, updateCompositionState(false, true));
    EXPECT_CALL(*mOutputLayer1, writeStateToHWC(false));
    EXPECT_CALL(*mOutputLayer2, updateCompositionState(false, true));
    EXPECT_CALL(*mOutputLayer2, writeStateToHWC(false));
    EXPECT_CALL(*mOutputLayer3, updateCompositionState(false, true));
    EXPECT_CALL(*mOutputLayer3, writeStateToHWC(false));

    injectLayer(std::move(mOutputLayer1));
    injectLayer(std::move(mOutputLayer2));
    injectLayer(std::move(mOutputLayer3));

    mOutput->editState().isEnabled = true;

    CompositionRefreshArgs args;
    args.updatingGeometryThisFrame = false;
    args.devOptForceClientComposition = true;
    mOutput->updateAndWriteCompositionState(args);
}

/*
 * Output::prepareFrame()
 */

struct OutputPrepareFrameTest : public testing::Test {
    struct OutputPartialMock : public OutputPartialMockBase {
        // Sets up the helper functions called by prepareFrame to use a mock
        // implementations.
        MOCK_METHOD0(chooseCompositionStrategy, void());
    };

    OutputPrepareFrameTest() {
        mOutput.setDisplayColorProfileForTest(
                std::unique_ptr<DisplayColorProfile>(mDisplayColorProfile));
        mOutput.setRenderSurfaceForTest(std::unique_ptr<RenderSurface>(mRenderSurface));
    }

    StrictMock<mock::CompositionEngine> mCompositionEngine;
    mock::DisplayColorProfile* mDisplayColorProfile = new StrictMock<mock::DisplayColorProfile>();
    mock::RenderSurface* mRenderSurface = new StrictMock<mock::RenderSurface>();
    StrictMock<OutputPartialMock> mOutput;
};

TEST_F(OutputPrepareFrameTest, takesEarlyOutIfNotEnabled) {
    mOutput.editState().isEnabled = false;

    mOutput.prepareFrame();
}

TEST_F(OutputPrepareFrameTest, delegatesToChooseCompositionStrategyAndRenderSurface) {
    mOutput.editState().isEnabled = true;
    mOutput.editState().usesClientComposition = false;
    mOutput.editState().usesDeviceComposition = true;

    EXPECT_CALL(mOutput, chooseCompositionStrategy()).Times(1);
    EXPECT_CALL(*mRenderSurface, prepareFrame(false, true));

    mOutput.prepareFrame();
}

// Note: Use OutputTest and not OutputPrepareFrameTest, so the real
// base chooseCompositionStrategy() is invoked.
TEST_F(OutputTest, prepareFrameSetsClientCompositionOnlyByDefault) {
    mOutput->editState().isEnabled = true;
    mOutput->editState().usesClientComposition = false;
    mOutput->editState().usesDeviceComposition = true;

    EXPECT_CALL(*mRenderSurface, prepareFrame(true, false));

    mOutput->prepareFrame();

    EXPECT_TRUE(mOutput->getState().usesClientComposition);
    EXPECT_FALSE(mOutput->getState().usesDeviceComposition);
}

/*
 * Output::present()
 */

struct OutputPresentTest : public testing::Test {
    struct OutputPartialMock : public OutputPartialMockBase {
        // All child helper functions Output::present() are defined as mocks,
        // and those are tested separately, allowing the present() test to
        // just cover the high level flow.
        MOCK_METHOD1(updateColorProfile, void(const compositionengine::CompositionRefreshArgs&));
        MOCK_METHOD1(updateAndWriteCompositionState,
                     void(const compositionengine::CompositionRefreshArgs&));
        MOCK_METHOD1(setColorTransform, void(const compositionengine::CompositionRefreshArgs&));
        MOCK_METHOD0(beginFrame, void());
        MOCK_METHOD0(prepareFrame, void());
        MOCK_METHOD1(devOptRepaintFlash, void(const compositionengine::CompositionRefreshArgs&));
        MOCK_METHOD1(finishFrame, void(const compositionengine::CompositionRefreshArgs&));
        MOCK_METHOD0(postFramebuffer, void());
    };

    StrictMock<OutputPartialMock> mOutput;
};

TEST_F(OutputPresentTest, justInvokesChildFunctionsInSequence) {
    CompositionRefreshArgs args;

    InSequence seq;
    EXPECT_CALL(mOutput, updateColorProfile(Ref(args)));
    EXPECT_CALL(mOutput, updateAndWriteCompositionState(Ref(args)));
    EXPECT_CALL(mOutput, setColorTransform(Ref(args)));
    EXPECT_CALL(mOutput, beginFrame());
    EXPECT_CALL(mOutput, prepareFrame());
    EXPECT_CALL(mOutput, devOptRepaintFlash(Ref(args)));
    EXPECT_CALL(mOutput, finishFrame(Ref(args)));
    EXPECT_CALL(mOutput, postFramebuffer());

    mOutput.present(args);
}

/*
 * Output::updateColorProfile()
 */

// TODO(b/144060211) - Add coverage

/*
 * Output::beginFrame()
 */

/*
 * Output::devOptRepaintFlash()
 */

// TODO(b/144060211) - Add coverage

/*
 * Output::finishFrame()
 */

// TODO(b/144060211) - Add coverage

/*
 * Output::postFramebuffer()
 */

// TODO(b/144060211) - Add coverage

/*
 * Output::composeSurfaces()
 */

struct OutputComposeSurfacesTest : public testing::Test {
    static constexpr uint32_t kDefaultOutputOrientation = TR_IDENT;
    static constexpr ui::Dataspace kDefaultOutputDataspace = ui::Dataspace::DISPLAY_P3;

    static const Rect kDefaultOutputFrame;
    static const Rect kDefaultOutputViewport;
    static const Rect kDefaultOutputScissor;
    static const mat4 kDefaultColorTransformMat;

    struct OutputPartialMock : public OutputPartialMockBase {
        // Sets up the helper functions called by composeSurfaces to use a mock
        // implementations.
        MOCK_CONST_METHOD0(getSkipColorTransform, bool());
        MOCK_METHOD2(generateClientCompositionRequests,
                     std::vector<renderengine::LayerSettings>(bool, Region&));
        MOCK_METHOD2(appendRegionFlashRequests,
                     void(const Region&, std::vector<renderengine::LayerSettings>&));
        MOCK_METHOD1(setExpensiveRenderingExpected, void(bool));
    };

    OutputComposeSurfacesTest() {
        mOutput.setDisplayColorProfileForTest(
                std::unique_ptr<DisplayColorProfile>(mDisplayColorProfile));
        mOutput.setRenderSurfaceForTest(std::unique_ptr<RenderSurface>(mRenderSurface));

        mOutput.editState().frame = kDefaultOutputFrame;
        mOutput.editState().viewport = kDefaultOutputViewport;
        mOutput.editState().scissor = kDefaultOutputScissor;
        mOutput.editState().transform = ui::Transform{kDefaultOutputOrientation};
        mOutput.editState().orientation = kDefaultOutputOrientation;
        mOutput.editState().dataspace = kDefaultOutputDataspace;
        mOutput.editState().colorTransformMatrix = kDefaultColorTransformMat;
        mOutput.editState().isSecure = true;
        mOutput.editState().needsFiltering = false;
        mOutput.editState().usesClientComposition = true;
        mOutput.editState().usesDeviceComposition = false;

        EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
        EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
                .WillRepeatedly(Return(&mOutputLayer1));
        EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(1u))
                .WillRepeatedly(Return(&mOutputLayer2));
        EXPECT_CALL(mOutput, getCompositionEngine()).WillRepeatedly(ReturnRef(mCompositionEngine));
        EXPECT_CALL(mCompositionEngine, getRenderEngine()).WillRepeatedly(ReturnRef(mRenderEngine));
    }

    StrictMock<mock::CompositionEngine> mCompositionEngine;
    StrictMock<renderengine::mock::RenderEngine> mRenderEngine;
    mock::DisplayColorProfile* mDisplayColorProfile = new StrictMock<mock::DisplayColorProfile>();
    mock::RenderSurface* mRenderSurface = new StrictMock<mock::RenderSurface>();
    StrictMock<mock::OutputLayer> mOutputLayer1;
    StrictMock<mock::OutputLayer> mOutputLayer2;
    StrictMock<OutputPartialMock> mOutput;
    sp<GraphicBuffer> mOutputBuffer = new GraphicBuffer();
};

const Rect OutputComposeSurfacesTest::kDefaultOutputFrame{1001, 1002, 1003, 1004};
const Rect OutputComposeSurfacesTest::kDefaultOutputViewport{1005, 1006, 1007, 1008};
const Rect OutputComposeSurfacesTest::kDefaultOutputScissor{1009, 1010, 1011, 1012};
const mat4 OutputComposeSurfacesTest::kDefaultColorTransformMat{mat4() * 0.5};

// TODO(b/121291683): Expand unit test coverage for composeSurfaces beyond these
// basic tests.

TEST_F(OutputComposeSurfacesTest, doesNothingIfNoClientComposition) {
    mOutput.editState().usesClientComposition = false;

    Region debugRegion;
    std::optional<base::unique_fd> readyFence = mOutput.composeSurfaces(debugRegion);
    EXPECT_TRUE(readyFence);
}

TEST_F(OutputComposeSurfacesTest, worksIfNoClientLayersQueued) {
    const Region kDebugRegion{Rect{100, 101, 102, 103}};

    constexpr float kDefaultMaxLuminance = 1.0f;
    constexpr float kDefaultAvgLuminance = 0.7f;
    constexpr float kDefaultMinLuminance = 0.1f;
    HdrCapabilities HdrCapabilities{{},
                                    kDefaultMaxLuminance,
                                    kDefaultAvgLuminance,
                                    kDefaultMinLuminance};

    EXPECT_CALL(mRenderEngine, supportsProtectedContent()).WillOnce(Return(false));
    EXPECT_CALL(mRenderEngine, drawLayers(_, _, _, true, _, _)).Times(1);

    EXPECT_CALL(*mDisplayColorProfile, hasWideColorGamut()).WillOnce(Return(true));
    EXPECT_CALL(*mDisplayColorProfile, getHdrCapabilities()).WillOnce(ReturnRef(HdrCapabilities));

    EXPECT_CALL(*mRenderSurface, dequeueBuffer(_)).WillOnce(Return(mOutputBuffer));

    EXPECT_CALL(mOutput, getSkipColorTransform()).WillOnce(Return(false));
    EXPECT_CALL(mOutput, generateClientCompositionRequests(false, _)).Times(1);
    EXPECT_CALL(mOutput, appendRegionFlashRequests(RegionEq(kDebugRegion), _)).Times(1);
    EXPECT_CALL(mOutput, setExpensiveRenderingExpected(true)).Times(1);
    EXPECT_CALL(mOutput, setExpensiveRenderingExpected(false)).Times(1);

    std::optional<base::unique_fd> readyFence = mOutput.composeSurfaces(kDebugRegion);
    EXPECT_TRUE(readyFence);
}

/*
 * Output::generateClientCompositionRequests()
 */

struct GenerateClientCompositionRequestsTest : public testing::Test {
    struct OutputPartialMock : public OutputPartialMockBase {
        // compositionengine::Output overrides
        std::vector<renderengine::LayerSettings> generateClientCompositionRequests(
                bool supportsProtectedContent, Region& clearRegion) override {
            return impl::Output::generateClientCompositionRequests(supportsProtectedContent,
                                                                   clearRegion);
        }
    };

    GenerateClientCompositionRequestsTest() {
        mOutput.setDisplayColorProfileForTest(
                std::unique_ptr<DisplayColorProfile>(mDisplayColorProfile));
        mOutput.setRenderSurfaceForTest(std::unique_ptr<RenderSurface>(mRenderSurface));
    }

    mock::DisplayColorProfile* mDisplayColorProfile = new StrictMock<mock::DisplayColorProfile>();
    mock::RenderSurface* mRenderSurface = new StrictMock<mock::RenderSurface>();
    StrictMock<OutputPartialMock> mOutput;
};

// TODO(b/121291683): Add more unit test coverage for generateClientCompositionRequests

TEST_F(GenerateClientCompositionRequestsTest, worksForLandscapeModeSplitScreen) {
    // In split-screen landscape mode, the screen is rotated 90 degrees, with
    // one layer on the left covering the left side of the output, and one layer
    // on the right covering that side of the output.

    StrictMock<mock::OutputLayer> leftOutputLayer;
    StrictMock<mock::OutputLayer> rightOutputLayer;

    StrictMock<mock::Layer> leftLayer;
    StrictMock<mock::LayerFE> leftLayerFE;
    StrictMock<mock::Layer> rightLayer;
    StrictMock<mock::LayerFE> rightLayerFE;

    impl::OutputLayerCompositionState leftOutputLayerState;
    leftOutputLayerState.clearClientTarget = false;
    leftOutputLayerState.visibleRegion = Region{Rect{0, 0, 1000, 1000}};

    LayerFECompositionState leftLayerFEState;
    leftLayerFEState.isOpaque = true;

    const half3 leftLayerColor{1.f, 0.f, 0.f};
    renderengine::LayerSettings leftLayerRESettings;
    leftLayerRESettings.source.solidColor = leftLayerColor;

    impl::OutputLayerCompositionState rightOutputLayerState;
    rightOutputLayerState.clearClientTarget = false;
    rightOutputLayerState.visibleRegion = Region{Rect{1000, 0, 2000, 1000}};

    LayerFECompositionState rightLayerFEState;
    rightLayerFEState.isOpaque = true;

    const half3 rightLayerColor{0.f, 1.f, 0.f};
    renderengine::LayerSettings rightLayerRESettings;
    rightLayerRESettings.source.solidColor = rightLayerColor;

    EXPECT_CALL(leftOutputLayer, getState()).WillRepeatedly(ReturnRef(leftOutputLayerState));
    EXPECT_CALL(leftOutputLayer, getLayer()).WillRepeatedly(ReturnRef(leftLayer));
    EXPECT_CALL(leftOutputLayer, getLayerFE()).WillRepeatedly(ReturnRef(leftLayerFE));
    EXPECT_CALL(leftOutputLayer, requiresClientComposition()).WillRepeatedly(Return(true));
    EXPECT_CALL(leftOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
    EXPECT_CALL(leftLayer, getFEState()).WillRepeatedly(ReturnRef(leftLayerFEState));
    EXPECT_CALL(leftLayerFE, prepareClientComposition(_)).WillOnce(Return(leftLayerRESettings));
    EXPECT_CALL(leftOutputLayer, editState()).WillRepeatedly(ReturnRef(leftOutputLayerState));

    EXPECT_CALL(rightOutputLayer, getState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
    EXPECT_CALL(rightOutputLayer, getLayer()).WillRepeatedly(ReturnRef(rightLayer));
    EXPECT_CALL(rightOutputLayer, getLayerFE()).WillRepeatedly(ReturnRef(rightLayerFE));
    EXPECT_CALL(rightOutputLayer, requiresClientComposition()).WillRepeatedly(Return(true));
    EXPECT_CALL(rightOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
    EXPECT_CALL(rightLayer, getFEState()).WillRepeatedly(ReturnRef(rightLayerFEState));
    EXPECT_CALL(rightLayerFE, prepareClientComposition(_)).WillOnce(Return(rightLayerRESettings));
    EXPECT_CALL(rightOutputLayer, editState()).WillRepeatedly(ReturnRef(rightOutputLayerState));

    EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
    EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
            .WillRepeatedly(Return(&leftOutputLayer));
    EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(1u))
            .WillRepeatedly(Return(&rightOutputLayer));

    const Rect kPortraitFrame(0, 0, 1000, 2000);
    const Rect kPortraitViewport(0, 0, 2000, 1000);
    const Rect kPortraitScissor(0, 0, 1000, 2000);
    const uint32_t kPortraitOrientation = TR_ROT_90;

    mOutput.editState().frame = kPortraitFrame;
    mOutput.editState().viewport = kPortraitViewport;
    mOutput.editState().scissor = kPortraitScissor;
    mOutput.editState().transform = ui::Transform{kPortraitOrientation};
    mOutput.editState().orientation = kPortraitOrientation;
    mOutput.editState().needsFiltering = true;
    mOutput.editState().isSecure = false;

    constexpr bool supportsProtectedContent = false;
    Region clearRegion;
    auto requests =
            mOutput.generateClientCompositionRequests(supportsProtectedContent, clearRegion);

    ASSERT_EQ(2u, requests.size());
    EXPECT_EQ(leftLayerColor, requests[0].source.solidColor);
    EXPECT_EQ(rightLayerColor, requests[1].source.solidColor);
}

TEST_F(GenerateClientCompositionRequestsTest, ignoresLayersThatDoNotIntersectWithViewport) {
    // Layers whose visible region does not intersect with the viewport will be
    // skipped when generating client composition request state.

    StrictMock<mock::OutputLayer> outputLayer;
    StrictMock<mock::Layer> layer;
    StrictMock<mock::LayerFE> layerFE;

    impl::OutputLayerCompositionState outputLayerState;
    outputLayerState.clearClientTarget = false;
    outputLayerState.visibleRegion = Region{Rect{3000, 0, 4000, 1000}};

    LayerFECompositionState layerFEState;
    layerFEState.isOpaque = true;

    EXPECT_CALL(outputLayer, getState()).WillRepeatedly(ReturnRef(outputLayerState));
    EXPECT_CALL(outputLayer, getLayer()).WillRepeatedly(ReturnRef(layer));
    EXPECT_CALL(outputLayer, getLayerFE()).WillRepeatedly(ReturnRef(layerFE));
    EXPECT_CALL(outputLayer, requiresClientComposition()).WillRepeatedly(Return(true));
    EXPECT_CALL(outputLayer, needsFiltering()).WillRepeatedly(Return(false));
    EXPECT_CALL(layer, getFEState()).WillRepeatedly(ReturnRef(layerFEState));
    EXPECT_CALL(layerFE, prepareClientComposition(_)).Times(0);
    EXPECT_CALL(outputLayer, editState()).WillRepeatedly(ReturnRef(outputLayerState));

    EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(1u));
    EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u)).WillRepeatedly(Return(&outputLayer));

    const Rect kPortraitFrame(0, 0, 1000, 2000);
    const Rect kPortraitViewport(0, 0, 2000, 1000);
    const Rect kPortraitScissor(0, 0, 1000, 2000);
    const uint32_t kPortraitOrientation = TR_ROT_90;

    mOutput.editState().frame = kPortraitFrame;
    mOutput.editState().viewport = kPortraitViewport;
    mOutput.editState().scissor = kPortraitScissor;
    mOutput.editState().transform = ui::Transform{kPortraitOrientation};
    mOutput.editState().orientation = kPortraitOrientation;
    mOutput.editState().needsFiltering = true;
    mOutput.editState().isSecure = false;

    constexpr bool supportsProtectedContent = false;
    Region clearRegion;
    auto requests =
            mOutput.generateClientCompositionRequests(supportsProtectedContent, clearRegion);

    EXPECT_EQ(0u, requests.size());
}

TEST_F(GenerateClientCompositionRequestsTest, clearsDeviceLayesAfterFirst) {
    // If client composition is performed with some layers set to use device
    // composition, device layers after the first layer (device or client) will
    // clear the frame buffer if they are opaque and if that layer has a flag
    // set to do so. The first layer is skipped as the frame buffer is already
    // expected to be clear.

    StrictMock<mock::OutputLayer> leftOutputLayer;
    StrictMock<mock::OutputLayer> rightOutputLayer;

    StrictMock<mock::Layer> leftLayer;
    StrictMock<mock::LayerFE> leftLayerFE;
    StrictMock<mock::Layer> rightLayer;
    StrictMock<mock::LayerFE> rightLayerFE;

    impl::OutputLayerCompositionState leftOutputLayerState;
    leftOutputLayerState.clearClientTarget = true;
    leftOutputLayerState.visibleRegion = Region{Rect{0, 0, 1000, 1000}};

    LayerFECompositionState leftLayerFEState;
    leftLayerFEState.isOpaque = true;

    impl::OutputLayerCompositionState rightOutputLayerState;
    rightOutputLayerState.clearClientTarget = true;
    rightOutputLayerState.visibleRegion = Region{Rect{1000, 0, 2000, 1000}};

    LayerFECompositionState rightLayerFEState;
    rightLayerFEState.isOpaque = true;

    const half3 rightLayerColor{0.f, 1.f, 0.f};
    renderengine::LayerSettings rightLayerRESettings;
    rightLayerRESettings.geometry.boundaries = FloatRect{456, 0, 0, 0};
    rightLayerRESettings.source.solidColor = rightLayerColor;

    EXPECT_CALL(leftOutputLayer, getState()).WillRepeatedly(ReturnRef(leftOutputLayerState));
    EXPECT_CALL(leftOutputLayer, getLayer()).WillRepeatedly(ReturnRef(leftLayer));
    EXPECT_CALL(leftOutputLayer, getLayerFE()).WillRepeatedly(ReturnRef(leftLayerFE));
    EXPECT_CALL(leftOutputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
    EXPECT_CALL(leftOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
    EXPECT_CALL(leftLayer, getFEState()).WillRepeatedly(ReturnRef(leftLayerFEState));
    EXPECT_CALL(leftOutputLayer, editState()).WillRepeatedly(ReturnRef(leftOutputLayerState));

    EXPECT_CALL(rightOutputLayer, getState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
    EXPECT_CALL(rightOutputLayer, getLayer()).WillRepeatedly(ReturnRef(rightLayer));
    EXPECT_CALL(rightOutputLayer, getLayerFE()).WillRepeatedly(ReturnRef(rightLayerFE));
    EXPECT_CALL(rightOutputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
    EXPECT_CALL(rightOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
    EXPECT_CALL(rightLayer, getFEState()).WillRepeatedly(ReturnRef(rightLayerFEState));
    EXPECT_CALL(rightLayerFE, prepareClientComposition(_)).WillOnce(Return(rightLayerRESettings));
    EXPECT_CALL(rightOutputLayer, editState()).WillRepeatedly(ReturnRef(rightOutputLayerState));

    EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
    EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
            .WillRepeatedly(Return(&leftOutputLayer));
    EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(1u))
            .WillRepeatedly(Return(&rightOutputLayer));

    const Rect kPortraitFrame(0, 0, 1000, 2000);
    const Rect kPortraitViewport(0, 0, 2000, 1000);
    const Rect kPortraitScissor(0, 0, 1000, 2000);
    const uint32_t kPortraitOrientation = TR_ROT_90;

    mOutput.editState().frame = kPortraitFrame;
    mOutput.editState().viewport = kPortraitViewport;
    mOutput.editState().scissor = kPortraitScissor;
    mOutput.editState().transform = ui::Transform{kPortraitOrientation};
    mOutput.editState().orientation = kPortraitOrientation;
    mOutput.editState().needsFiltering = true;
    mOutput.editState().isSecure = false;

    constexpr bool supportsProtectedContent = false;
    Region clearRegion;
    auto requests =
            mOutput.generateClientCompositionRequests(supportsProtectedContent, clearRegion);

    const half3 clearColor{0.f, 0.f, 0.f};

    ASSERT_EQ(1u, requests.size());
    EXPECT_EQ(456.f, requests[0].geometry.boundaries.left);
    EXPECT_EQ(clearColor, requests[0].source.solidColor);
}

} // namespace
} // namespace android::compositionengine