Merge "DO NOT MERGE - Merge qt-dev-plus-aosp-without-vendor (5699924) into stage-aosp-master" into stage-aosp-master

1 files changed, 1334 insertions, 0 deletions

diff --git a/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp
new file mode 100644
index 0000000000..0648b3456a
--- /dev/null
+++ b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp
@@ -0,0 +1,1334 @@
+/*
+ * Copyright 2018 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.
+ */
+
+#define LOG_TAG "graphics_composer_hidl_hal_readback_tests@2.2"
+
+#include <VtsHalHidlTargetTestBase.h>
+#include <VtsHalHidlTargetTestEnvBase.h>
+#include <android-base/unique_fd.h>
+#include <android/hardware/graphics/composer/2.2/IComposerClient.h>
+#include <composer-command-buffer/2.2/ComposerCommandBuffer.h>
+#include <composer-vts/2.1/GraphicsComposerCallback.h>
+#include <composer-vts/2.1/TestCommandReader.h>
+#include <composer-vts/2.2/ComposerVts.h>
+#include <mapper-vts/2.1/MapperVts.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace composer {
+namespace V2_2 {
+namespace vts {
+namespace {
+
+using android::hardware::hidl_handle;
+using common::V1_1::BufferUsage;
+using common::V1_1::Dataspace;
+using common::V1_1::PixelFormat;
+using mapper::V2_1::IMapper;
+using V2_1::Display;
+using V2_1::Layer;
+using V2_1::vts::AccessRegion;
+using V2_1::vts::TestCommandReader;
+
+static const IComposerClient::Color BLACK = {0, 0, 0, 0xff};
+static const IComposerClient::Color RED = {0xff, 0, 0, 0xff};
+static const IComposerClient::Color TRANSLUCENT_RED = {0xff, 0, 0, 0x33};
+static const IComposerClient::Color GREEN = {0, 0xff, 0, 0xff};
+static const IComposerClient::Color BLUE = {0, 0, 0xff, 0xff};
+
+// Test environment for graphics.composer
+class GraphicsComposerHidlEnvironment : public ::testing::VtsHalHidlTargetTestEnvBase {
+   public:
+    // get the test environment singleton
+    static GraphicsComposerHidlEnvironment* Instance() {
+        static GraphicsComposerHidlEnvironment* instance = new GraphicsComposerHidlEnvironment;
+        return instance;
+    }
+    virtual void registerTestServices() override { registerTestService<IComposer>(); }
+
+   private:
+    GraphicsComposerHidlEnvironment() {}
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(GraphicsComposerHidlEnvironment);
+};
+
+class TestLayer {
+   public:
+    TestLayer(const std::shared_ptr<ComposerClient>& client, Display display)
+        : mLayer(client->createLayer(display, kBufferSlotCount)), mComposerClient(client) {}
+
+    // ComposerClient will take care of destroying layers, no need to explicitly
+    // call destroyLayers here
+    virtual ~TestLayer(){};
+
+    virtual void write(const std::shared_ptr<CommandWriterBase>& writer) {
+        writer->selectLayer(mLayer);
+        writer->setLayerDisplayFrame(mDisplayFrame);
+        writer->setLayerSourceCrop(mSourceCrop);
+        writer->setLayerZOrder(mZOrder);
+        writer->setLayerSurfaceDamage(mSurfaceDamage);
+        writer->setLayerTransform(mTransform);
+        writer->setLayerPlaneAlpha(mAlpha);
+        writer->setLayerBlendMode(mBlendMode);
+    }
+
+    void setDisplayFrame(IComposerClient::Rect frame) { mDisplayFrame = frame; }
+    void setSourceCrop(IComposerClient::FRect crop) { mSourceCrop = crop; }
+    void setZOrder(uint32_t z) { mZOrder = z; }
+
+    void setSurfaceDamage(std::vector<IComposerClient::Rect> surfaceDamage) {
+        mSurfaceDamage = surfaceDamage;
+    }
+
+    void setTransform(Transform transform) { mTransform = transform; }
+    void setAlpha(float alpha) { mAlpha = alpha; }
+    void setBlendMode(IComposerClient::BlendMode blendMode) { mBlendMode = blendMode; }
+
+    static constexpr uint32_t kBufferSlotCount = 64;
+
+    IComposerClient::Rect mDisplayFrame = {0, 0, 0, 0};
+    uint32_t mZOrder = 0;
+    std::vector<IComposerClient::Rect> mSurfaceDamage;
+    Transform mTransform = static_cast<Transform>(0);
+    IComposerClient::FRect mSourceCrop = {0, 0, 0, 0};
+    float mAlpha = 1.0;
+    IComposerClient::BlendMode mBlendMode = IComposerClient::BlendMode::NONE;
+
+   protected:
+    Layer mLayer;
+
+   private:
+    std::shared_ptr<ComposerClient> const mComposerClient;
+};
+
+class GraphicsComposerReadbackTest : public ::testing::VtsHalHidlTargetTestBase {
+   public:
+    static int32_t GetBytesPerPixel(PixelFormat pixelFormat) {
+        switch (pixelFormat) {
+            case PixelFormat::RGBA_8888:
+                return 4;
+            case PixelFormat::RGB_888:
+                return 3;
+            default:
+                return -1;
+        }
+    }
+
+    static void fillBuffer(int32_t width, int32_t height, uint32_t stride, void* bufferData,
+                           PixelFormat pixelFormat,
+                           std::vector<IComposerClient::Color> desiredPixelColors) {
+        ASSERT_TRUE(pixelFormat == PixelFormat::RGB_888 || pixelFormat == PixelFormat::RGBA_8888);
+        int32_t bytesPerPixel = GetBytesPerPixel(pixelFormat);
+        ASSERT_NE(-1, bytesPerPixel);
+        for (int row = 0; row < height; row++) {
+            for (int col = 0; col < width; col++) {
+                int pixel = row * width + col;
+                IComposerClient::Color srcColor = desiredPixelColors[pixel];
+
+                int offset = (row * stride + col) * bytesPerPixel;
+                uint8_t* pixelColor = (uint8_t*)bufferData + offset;
+                pixelColor[0] = srcColor.r;
+                pixelColor[1] = srcColor.g;
+                pixelColor[2] = srcColor.b;
+
+                if (bytesPerPixel == 4) {
+                    pixelColor[3] = srcColor.a;
+                }
+            }
+        }
+    }
+
+   protected:
+    using PowerMode = V2_1::IComposerClient::PowerMode;
+    void SetUp() override {
+        VtsHalHidlTargetTestBase::SetUp();
+        ASSERT_NO_FATAL_FAILURE(
+            mComposer = std::make_unique<Composer>(
+                GraphicsComposerHidlEnvironment::Instance()->getServiceName<IComposer>()));
+        ASSERT_NO_FATAL_FAILURE(mComposerClient = mComposer->createClient());
+        mComposerCallback = new V2_1::vts::GraphicsComposerCallback;
+        mComposerClient->registerCallback(mComposerCallback);
+
+        // assume the first display is primary and is never removed
+        mPrimaryDisplay = waitForFirstDisplay();
+        Config activeConfig;
+        ASSERT_NO_FATAL_FAILURE(activeConfig = mComposerClient->getActiveConfig(mPrimaryDisplay));
+        ASSERT_NO_FATAL_FAILURE(
+            mDisplayWidth = mComposerClient->getDisplayAttribute(
+                mPrimaryDisplay, activeConfig, IComposerClient::Attribute::WIDTH));
+        ASSERT_NO_FATAL_FAILURE(
+            mDisplayHeight = mComposerClient->getDisplayAttribute(
+                mPrimaryDisplay, activeConfig, IComposerClient::Attribute::HEIGHT));
+
+        // explicitly disable vsync
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setVsyncEnabled(mPrimaryDisplay, false));
+        mComposerCallback->setVsyncAllowed(false);
+
+        // set up command writer/reader and gralloc
+        mWriter = std::make_shared<CommandWriterBase>(1024);
+        mReader = std::make_unique<TestCommandReader>();
+        mGralloc = std::make_shared<Gralloc>();
+
+        mComposerClient->getRaw()->getReadbackBufferAttributes(
+            mPrimaryDisplay,
+            [&](const auto& tmpError, const auto& tmpPixelFormat, const auto& tmpDataspace) {
+                mHasReadbackBuffer = readbackSupported(tmpPixelFormat, tmpDataspace, tmpError);
+                mPixelFormat = tmpPixelFormat;
+                mDataspace = tmpDataspace;
+            });
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setPowerMode(mPrimaryDisplay, PowerMode::ON));
+    }
+
+    void TearDown() override {
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setPowerMode(mPrimaryDisplay, PowerMode::OFF));
+        EXPECT_EQ(0, mReader->mErrors.size());
+        EXPECT_EQ(0, mReader->mCompositionChanges.size());
+        if (mComposerCallback != nullptr) {
+            EXPECT_EQ(0, mComposerCallback->getInvalidHotplugCount());
+            EXPECT_EQ(0, mComposerCallback->getInvalidRefreshCount());
+            EXPECT_EQ(0, mComposerCallback->getInvalidVsyncCount());
+        }
+        VtsHalHidlTargetTestBase::TearDown();
+    }
+
+    void clearCommandReaderState() {
+        mReader->mCompositionChanges.clear();
+        mReader->mErrors.clear();
+    }
+
+    void execute() {
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->execute(mReader.get(), mWriter.get()));
+    }
+
+    void writeLayers(const std::vector<std::shared_ptr<TestLayer>>& layers) {
+        for (auto layer : layers) {
+            layer->write(mWriter);
+        }
+        execute();
+    }
+
+    void clearColors(std::vector<IComposerClient::Color>& expectedColors, int32_t width,
+                     int32_t height) {
+        for (int row = 0; row < height; row++) {
+            for (int col = 0; col < width; col++) {
+                int pixel = row * mDisplayWidth + col;
+                expectedColors[pixel] = BLACK;
+            }
+        }
+    }
+
+    void fillColorsArea(std::vector<IComposerClient::Color>& expectedColors, int32_t stride,
+                        IComposerClient::Rect area, IComposerClient::Color color) {
+        for (int row = area.top; row < area.bottom; row++) {
+            for (int col = area.left; col < area.right; col++) {
+                int pixel = row * stride + col;
+                expectedColors[pixel] = color;
+            }
+        }
+    }
+
+    bool readbackSupported(const PixelFormat& pixelFormat, const Dataspace& dataspace,
+                           const Error error) {
+        if (error != Error::NONE) {
+            return false;
+        }
+        // TODO: add support for RGBA_1010102
+        if (pixelFormat != PixelFormat::RGB_888 && pixelFormat != PixelFormat::RGBA_8888) {
+            return false;
+        }
+        if (dataspace != Dataspace::V0_SRGB) {
+            return false;
+        }
+        return true;
+    }
+
+
+    std::unique_ptr<Composer> mComposer;
+    std::shared_ptr<ComposerClient> mComposerClient;
+
+    sp<V2_1::vts::GraphicsComposerCallback> mComposerCallback;
+    // the first display and is assumed never to be removed
+    Display mPrimaryDisplay;
+    int32_t mDisplayWidth;
+    int32_t mDisplayHeight;
+    std::shared_ptr<CommandWriterBase> mWriter;
+    std::unique_ptr<TestCommandReader> mReader;
+    std::shared_ptr<Gralloc> mGralloc;
+
+    bool mHasReadbackBuffer;
+    PixelFormat mPixelFormat;
+    Dataspace mDataspace;
+
+    static constexpr uint32_t kClientTargetSlotCount = 64;
+
+   private:
+    Display waitForFirstDisplay() {
+        while (true) {
+            std::vector<Display> displays = mComposerCallback->getDisplays();
+            if (displays.empty()) {
+                usleep(5 * 1000);
+                continue;
+            }
+            return displays[0];
+        }
+    }
+};
+class ReadbackBuffer {
+   public:
+    ReadbackBuffer(Display display, const std::shared_ptr<ComposerClient>& client,
+                   const std::shared_ptr<Gralloc>& gralloc, uint32_t width, uint32_t height,
+                   PixelFormat pixelFormat, Dataspace dataspace) {
+        mDisplay = display;
+
+        mComposerClient = client;
+        mGralloc = gralloc;
+
+        mFormat = pixelFormat;
+        mDataspace = dataspace;
+
+        mWidth = width;
+        mHeight = height;
+        mLayerCount = 1;
+        mUsage = static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::GPU_TEXTURE);
+
+        mAccessRegion.top = 0;
+        mAccessRegion.left = 0;
+        mAccessRegion.width = width;
+        mAccessRegion.height = height;
+    };
+
+    ~ReadbackBuffer() {
+        if (mBufferHandle != nullptr) {
+            mGralloc->freeBuffer(mBufferHandle);
+        }
+    }
+
+    void setReadbackBuffer() {
+        if (mBufferHandle != nullptr) {
+            mGralloc->freeBuffer(mBufferHandle);
+            mBufferHandle = nullptr;
+        }
+        mBufferHandle = mGralloc->allocate(mWidth, mHeight, mLayerCount, mFormat, mUsage,
+                                           /*import*/ true, &mStride);
+        ASSERT_NE(false, mGralloc->validateBufferSize(mBufferHandle, mWidth, mHeight, mLayerCount,
+                                                      mFormat, mUsage, mStride));
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setReadbackBuffer(mDisplay, mBufferHandle, -1));
+    }
+
+    void checkReadbackBuffer(std::vector<IComposerClient::Color> expectedColors) {
+        // lock buffer for reading
+        int32_t fenceHandle;
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->getReadbackBufferFence(mDisplay, &fenceHandle));
+
+        void* bufData = mGralloc->lock(mBufferHandle, mUsage, mAccessRegion, fenceHandle);
+        ASSERT_TRUE(mFormat == PixelFormat::RGB_888 || mFormat == PixelFormat::RGBA_8888);
+        int32_t bytesPerPixel = GraphicsComposerReadbackTest::GetBytesPerPixel(mFormat);
+        ASSERT_NE(-1, bytesPerPixel);
+        for (int row = 0; row < mHeight; row++) {
+            for (int col = 0; col < mWidth; col++) {
+                int pixel = row * mWidth + col;
+                int offset = (row * mStride + col) * bytesPerPixel;
+                uint8_t* pixelColor = (uint8_t*)bufData + offset;
+
+                ASSERT_EQ(expectedColors[pixel].r, pixelColor[0]);
+                ASSERT_EQ(expectedColors[pixel].g, pixelColor[1]);
+                ASSERT_EQ(expectedColors[pixel].b, pixelColor[2]);
+            }
+        }
+        int32_t unlockFence = mGralloc->unlock(mBufferHandle);
+        if (unlockFence != -1) {
+            sync_wait(unlockFence, -1);
+            close(unlockFence);
+        }
+    }
+
+    uint32_t mWidth;
+    uint32_t mHeight;
+    uint32_t mLayerCount;
+    PixelFormat mFormat;
+    uint64_t mUsage;
+    AccessRegion mAccessRegion;
+
+  protected:
+    uint32_t mStride;
+    const native_handle_t* mBufferHandle = nullptr;
+    Dataspace mDataspace;
+    Display mDisplay;
+    std::shared_ptr<Gralloc> mGralloc;
+    std::shared_ptr<ComposerClient> mComposerClient;
+};
+
+class TestColorLayer : public TestLayer {
+   public:
+    TestColorLayer(const std::shared_ptr<ComposerClient>& client, Display display)
+        : TestLayer{client, display} {}
+
+    void write(const std::shared_ptr<CommandWriterBase>& writer) override {
+        TestLayer::write(writer);
+        writer->setLayerCompositionType(IComposerClient::Composition::SOLID_COLOR);
+        writer->setLayerColor(mColor);
+    }
+
+    void setColor(IComposerClient::Color color) { mColor = color; }
+
+   private:
+    IComposerClient::Color mColor = {0xff, 0xff, 0xff, 0xff};
+};
+
+class TestBufferLayer : public TestLayer {
+   public:
+    TestBufferLayer(const std::shared_ptr<ComposerClient>& client,
+                    const std::shared_ptr<Gralloc>& gralloc, Display display, int32_t width,
+                    int32_t height, PixelFormat format,
+                    IComposerClient::Composition composition = IComposerClient::Composition::DEVICE)
+        : TestLayer{client, display} {
+        mGralloc = gralloc;
+        mComposition = composition;
+        mWidth = width;
+        mHeight = height;
+        mLayerCount = 1;
+        mFormat = format;
+        mUsage = static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN |
+                                       BufferUsage::COMPOSER_OVERLAY);
+
+        mAccessRegion.top = 0;
+        mAccessRegion.left = 0;
+        mAccessRegion.width = width;
+        mAccessRegion.height = height;
+
+        setSourceCrop({0, 0, (float)width, (float)height});
+    }
+
+    ~TestBufferLayer() {
+        if (mBufferHandle != nullptr) {
+            mGralloc->freeBuffer(mBufferHandle);
+        }
+    }
+
+    void write(const std::shared_ptr<CommandWriterBase>& writer) override {
+        TestLayer::write(writer);
+        writer->setLayerCompositionType(mComposition);
+        writer->setLayerDataspace(Dataspace::UNKNOWN);
+        writer->setLayerVisibleRegion(std::vector<IComposerClient::Rect>(1, mDisplayFrame));
+        if (mBufferHandle != nullptr) writer->setLayerBuffer(0, mBufferHandle, mFillFence);
+    }
+
+    void fillBuffer(std::vector<IComposerClient::Color> expectedColors) {
+        void* bufData = mGralloc->lock(mBufferHandle, mUsage, mAccessRegion, -1);
+        ASSERT_NO_FATAL_FAILURE(GraphicsComposerReadbackTest::fillBuffer(
+                mWidth, mHeight, mStride, bufData, mFormat, expectedColors));
+        mFillFence = mGralloc->unlock(mBufferHandle);
+        if (mFillFence != -1) {
+            sync_wait(mFillFence, -1);
+            close(mFillFence);
+        }
+    }
+    void setBuffer(std::vector<IComposerClient::Color> colors) {
+        if (mBufferHandle != nullptr) {
+            mGralloc->freeBuffer(mBufferHandle);
+            mBufferHandle = nullptr;
+        }
+        mBufferHandle = mGralloc->allocate(mWidth, mHeight, mLayerCount, mFormat, mUsage,
+                                           /*import*/ true, &mStride);
+        ASSERT_NE(nullptr, mBufferHandle);
+        ASSERT_NO_FATAL_FAILURE(fillBuffer(colors));
+        ASSERT_NE(false, mGralloc->validateBufferSize(mBufferHandle, mWidth, mHeight, mLayerCount,
+                                                      mFormat, mUsage, mStride));
+    }
+
+    void setToClientComposition(const std::shared_ptr<CommandWriterBase>& writer) {
+        writer->selectLayer(mLayer);
+        writer->setLayerCompositionType(IComposerClient::Composition::CLIENT);
+    }
+
+    AccessRegion mAccessRegion;
+    uint32_t mStride;
+    uint32_t mWidth;
+    uint32_t mHeight;
+    uint32_t mLayerCount;
+    PixelFormat mFormat;
+
+  protected:
+    uint64_t mUsage;
+    IComposerClient::Composition mComposition;
+    std::shared_ptr<Gralloc> mGralloc;
+    int32_t mFillFence;
+    const native_handle_t* mBufferHandle = nullptr;
+};
+
+TEST_F(GraphicsComposerReadbackTest, SingleSolidColorLayer) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+    mWriter->selectDisplay(mPrimaryDisplay);
+    ASSERT_NO_FATAL_FAILURE(mComposerClient->setColorMode(mPrimaryDisplay, ColorMode::SRGB,
+                                                          RenderIntent::COLORIMETRIC));
+
+    auto layer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+    IComposerClient::Rect coloredSquare({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setColor(BLUE);
+    layer->setDisplayFrame(coloredSquare);
+    layer->setZOrder(10);
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    // expected color for each pixel
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, coloredSquare, BLUE);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    // if hwc cannot handle and asks for composition change,
+    // just succeed the test
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerBuffer) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight / 4}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 4, mDisplayWidth, mDisplayHeight / 2}, GREEN);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 2, mDisplayWidth, mDisplayHeight}, BLUE);
+
+    auto layer =
+        std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth,
+                                          mDisplayHeight, PixelFormat::RGBA_8888);
+    layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setZOrder(10);
+    ASSERT_NO_FATAL_FAILURE(layer->setBuffer(expectedColors));
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    mWriter->presentDisplay();
+    execute();
+
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerBufferNoEffect) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+    ASSERT_NO_FATAL_FAILURE(mComposerClient->setColorMode(mPrimaryDisplay, ColorMode::SRGB,
+                                                          RenderIntent::COLORIMETRIC));
+
+    auto layer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+    IComposerClient::Rect coloredSquare({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setColor(BLUE);
+    layer->setDisplayFrame(coloredSquare);
+    layer->setZOrder(10);
+    layer->write(mWriter);
+
+    // This following buffer call should have no effect
+    PixelFormat format = PixelFormat::RGBA_8888;
+    uint64_t usage =
+            static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN);
+    const native_handle_t* bufferHandle =
+            mGralloc->allocate(mDisplayWidth, mDisplayHeight, 1, format, usage);
+    mWriter->setLayerBuffer(0, bufferHandle, -1);
+
+    // expected color for each pixel
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, coloredSquare, BLUE);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    mWriter->validateDisplay();
+    execute();
+
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, ClientComposition) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight / 4}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 4, mDisplayWidth, mDisplayHeight / 2}, GREEN);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 2, mDisplayWidth, mDisplayHeight}, BLUE);
+
+    auto layer =
+        std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth,
+                                          mDisplayHeight, PixelFormat::RGBA_FP16);
+    layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setZOrder(10);
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+
+    if (mReader->mCompositionChanges.size() != 0) {
+        ASSERT_EQ(1, mReader->mCompositionChanges.size());
+        ASSERT_EQ(1, mReader->mCompositionChanges[0].second);
+
+        ASSERT_NO_FATAL_FAILURE(
+            mComposerClient->setClientTargetSlotCount(mPrimaryDisplay, kClientTargetSlotCount));
+
+        // create client target buffer
+        uint32_t clientStride;
+        PixelFormat clientFormat = PixelFormat::RGBA_8888;
+        uint64_t clientUsage =
+                static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN |
+                                      BufferUsage::COMPOSER_CLIENT_TARGET);
+        const native_handle_t* clientBufferHandle =
+                mGralloc->allocate(layer->mWidth, layer->mHeight, layer->mLayerCount, clientFormat,
+                                   clientUsage, /*import*/ true, &clientStride);
+        ASSERT_NE(nullptr, clientBufferHandle);
+
+        void* clientBufData =
+                mGralloc->lock(clientBufferHandle, clientUsage, layer->mAccessRegion, -1);
+
+        ASSERT_NO_FATAL_FAILURE(fillBuffer(layer->mWidth, layer->mHeight, clientStride,
+                                           clientBufData, clientFormat, expectedColors));
+        int clientFence = mGralloc->unlock(clientBufferHandle);
+        if (clientFence != -1) {
+            sync_wait(clientFence, -1);
+            close(clientFence);
+        }
+
+        IComposerClient::Rect damage{0, 0, mDisplayWidth, mDisplayHeight};
+        mWriter->setClientTarget(0, clientBufferHandle, clientFence, Dataspace::UNKNOWN,
+                                 std::vector<IComposerClient::Rect>(1, damage));
+
+        layer->setToClientComposition(mWriter);
+        mWriter->validateDisplay();
+        execute();
+        ASSERT_EQ(0, mReader->mCompositionChanges.size());
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    mWriter->presentDisplay();
+    execute();
+
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, DeviceAndClientComposition) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+    ASSERT_NO_FATAL_FAILURE(
+        mComposerClient->setClientTargetSlotCount(mPrimaryDisplay, kClientTargetSlotCount));
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight / 2}, GREEN);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 2, mDisplayWidth, mDisplayHeight}, RED);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    auto deviceLayer =
+        std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth,
+                                          mDisplayHeight / 2, PixelFormat::RGBA_8888);
+    std::vector<IComposerClient::Color> deviceColors(deviceLayer->mWidth * deviceLayer->mHeight);
+    fillColorsArea(deviceColors, deviceLayer->mWidth,
+                   {0, 0, static_cast<int32_t>(deviceLayer->mWidth),
+                    static_cast<int32_t>(deviceLayer->mHeight)},
+                   GREEN);
+    deviceLayer->setDisplayFrame({0, 0, static_cast<int32_t>(deviceLayer->mWidth),
+                                  static_cast<int32_t>(deviceLayer->mHeight)});
+    deviceLayer->setZOrder(10);
+    ASSERT_NO_FATAL_FAILURE(deviceLayer->setBuffer(deviceColors));
+    deviceLayer->write(mWriter);
+
+    auto clientLayer = std::make_shared<TestBufferLayer>(
+        mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth, mDisplayHeight / 2,
+        PixelFormat::RGBA_8888, IComposerClient::Composition::CLIENT);
+    IComposerClient::Rect clientFrame = {0, mDisplayHeight / 2, mDisplayWidth, mDisplayHeight};
+    clientLayer->setDisplayFrame(clientFrame);
+    clientLayer->setZOrder(0);
+    clientLayer->write(mWriter);
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    uint64_t clientUsage =
+            static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN |
+                                  BufferUsage::COMPOSER_CLIENT_TARGET);
+    uint32_t clientStride;
+    const native_handle_t* clientBufferHandle =
+            mGralloc->allocate(mDisplayWidth, mDisplayHeight, 1, PixelFormat::RGBA_8888,
+                               clientUsage, /*import*/ true, &clientStride);
+    ASSERT_NE(nullptr, clientBufferHandle);
+
+    AccessRegion clientAccessRegion;
+    clientAccessRegion.left = 0;
+    clientAccessRegion.top = 0;
+    clientAccessRegion.width = mDisplayWidth;
+    clientAccessRegion.height = mDisplayHeight;
+    void* clientData = mGralloc->lock(clientBufferHandle, clientUsage, clientAccessRegion, -1);
+    std::vector<IComposerClient::Color> clientColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(clientColors, mDisplayWidth, clientFrame, RED);
+    ASSERT_NO_FATAL_FAILURE(fillBuffer(mDisplayWidth, mDisplayHeight, clientStride, clientData,
+                                       PixelFormat::RGBA_8888, clientColors));
+    int clientFence = mGralloc->unlock(clientBufferHandle);
+    if (clientFence != -1) {
+        sync_wait(clientFence, -1);
+        close(clientFence);
+    }
+
+    mWriter->setClientTarget(0, clientBufferHandle, clientFence, Dataspace::UNKNOWN,
+                             std::vector<IComposerClient::Rect>(1, clientFrame));
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerDamage) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelformat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    IComposerClient::Rect redRect = {0, 0, mDisplayWidth / 4, mDisplayHeight / 4};
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, redRect, RED);
+
+    auto layer =
+        std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth,
+                                          mDisplayHeight, PixelFormat::RGBA_8888);
+    layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setZOrder(10);
+    ASSERT_NO_FATAL_FAILURE(layer->setBuffer(expectedColors));
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+
+    // update surface damage and recheck
+    redRect = {mDisplayWidth / 4, mDisplayHeight / 4, mDisplayWidth / 2, mDisplayHeight / 2};
+    clearColors(expectedColors, mDisplayWidth, mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, redRect, RED);
+
+    ASSERT_NO_FATAL_FAILURE(layer->fillBuffer(expectedColors));
+    layer->setSurfaceDamage(
+        std::vector<IComposerClient::Rect>(1, {0, 0, mDisplayWidth / 2, mDisplayWidth / 2}));
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_EQ(0, mReader->mCompositionChanges.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerPlaneAlpha) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+    ASSERT_NO_FATAL_FAILURE(mComposerClient->setColorMode(mPrimaryDisplay, ColorMode::SRGB,
+                                                          RenderIntent::COLORIMETRIC));
+
+    auto layer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+    layer->setColor(RED);
+    layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setZOrder(10);
+    layer->setAlpha(0);
+    layer->setBlendMode(IComposerClient::BlendMode::PREMULTIPLIED);
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerSourceCrop) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight / 4}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mDisplayHeight / 2, mDisplayWidth, mDisplayHeight}, BLUE);
+
+    auto layer =
+        std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay, mDisplayWidth,
+                                          mDisplayHeight, PixelFormat::RGBA_8888);
+    layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+    layer->setZOrder(10);
+    layer->setSourceCrop({0, static_cast<float>(mDisplayHeight / 2),
+                          static_cast<float>(mDisplayWidth), static_cast<float>(mDisplayHeight)});
+    ASSERT_NO_FATAL_FAILURE(layer->setBuffer(expectedColors));
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {layer};
+
+    // update expected colors to match crop
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight}, BLUE);
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerReadbackTest, SetLayerZOrder) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+    ASSERT_NO_FATAL_FAILURE(mComposerClient->setColorMode(mPrimaryDisplay, ColorMode::SRGB,
+                                                          RenderIntent::COLORIMETRIC));
+
+    IComposerClient::Rect redRect = {0, 0, mDisplayWidth, mDisplayHeight / 2};
+    IComposerClient::Rect blueRect = {0, mDisplayHeight / 4, mDisplayWidth, mDisplayHeight};
+    auto redLayer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+    redLayer->setColor(RED);
+    redLayer->setDisplayFrame(redRect);
+
+    auto blueLayer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+    blueLayer->setColor(BLUE);
+    blueLayer->setDisplayFrame(blueRect);
+    blueLayer->setZOrder(5);
+
+    std::vector<std::shared_ptr<TestLayer>> layers = {redLayer, blueLayer};
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+
+    // red in front of blue
+    redLayer->setZOrder(10);
+
+    // fill blue first so that red will overwrite on overlap
+    fillColorsArea(expectedColors, mDisplayWidth, blueRect, BLUE);
+    fillColorsArea(expectedColors, mDisplayWidth, redRect, RED);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+
+    redLayer->setZOrder(1);
+    clearColors(expectedColors, mDisplayWidth, mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth, redRect, RED);
+    fillColorsArea(expectedColors, mDisplayWidth, blueRect, BLUE);
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    writeLayers(layers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mCompositionChanges.size());
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+class GraphicsComposerBlendModeReadbackTest : public GraphicsComposerReadbackTest,
+                                              public ::testing::WithParamInterface<float> {
+   public:
+    void SetUp() override {
+        GraphicsComposerReadbackTest::SetUp();
+        mBackgroundColor = BLACK;
+        mTopLayerColor = RED;
+    }
+
+    void TearDown() override { GraphicsComposerReadbackTest::TearDown(); }
+
+    void setBackgroundColor(IComposerClient::Color color) { mBackgroundColor = color; }
+
+    void setTopLayerColor(IComposerClient::Color color) { mTopLayerColor = color; }
+
+    void setUpLayers(IComposerClient::BlendMode blendMode) {
+        mLayers.clear();
+        std::vector<IComposerClient::Color> topLayerPixelColors(mDisplayWidth * mDisplayHeight);
+        fillColorsArea(topLayerPixelColors, mDisplayWidth, {0, 0, mDisplayWidth, mDisplayHeight},
+                       mTopLayerColor);
+
+        auto backgroundLayer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+        backgroundLayer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+        backgroundLayer->setZOrder(0);
+        backgroundLayer->setColor(mBackgroundColor);
+
+        auto layer = std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay,
+                                                       mDisplayWidth, mDisplayHeight,
+                                                       PixelFormat::RGBA_8888);
+        layer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+        layer->setZOrder(10);
+        ASSERT_NO_FATAL_FAILURE(layer->setBuffer(topLayerPixelColors));
+
+        layer->setBlendMode(blendMode);
+        layer->setAlpha(GetParam());
+
+        mLayers.push_back(backgroundLayer);
+        mLayers.push_back(layer);
+    }
+
+    void setExpectedColors(std::vector<IComposerClient::Color>& expectedColors) {
+        ASSERT_EQ(2, mLayers.size());
+        clearColors(expectedColors, mDisplayWidth, mDisplayHeight);
+
+        auto layer = mLayers[1];
+        IComposerClient::BlendMode blendMode = layer->mBlendMode;
+        float alpha = mTopLayerColor.a / 255.0 * layer->mAlpha;
+        if (blendMode == IComposerClient::BlendMode::NONE) {
+            for (int i = 0; i < expectedColors.size(); i++) {
+                expectedColors[i].r = mTopLayerColor.r * layer->mAlpha;
+                expectedColors[i].g = mTopLayerColor.g * layer->mAlpha;
+                expectedColors[i].b = mTopLayerColor.b * layer->mAlpha;
+                expectedColors[i].a = alpha * 255.0;
+            }
+        } else if (blendMode == IComposerClient::BlendMode::PREMULTIPLIED) {
+            for (int i = 0; i < expectedColors.size(); i++) {
+                expectedColors[i].r =
+                    mTopLayerColor.r * layer->mAlpha + mBackgroundColor.r * (1.0 - alpha);
+                expectedColors[i].g =
+                    mTopLayerColor.g * layer->mAlpha + mBackgroundColor.g * (1.0 - alpha);
+                expectedColors[i].b =
+                    mTopLayerColor.b * layer->mAlpha + mBackgroundColor.b * (1.0 - alpha);
+                expectedColors[i].a = alpha + mBackgroundColor.a * (1.0 - alpha);
+            }
+        } else if (blendMode == IComposerClient::BlendMode::COVERAGE) {
+            for (int i = 0; i < expectedColors.size(); i++) {
+                expectedColors[i].r = mTopLayerColor.r * alpha + mBackgroundColor.r * (1.0 - alpha);
+                expectedColors[i].g = mTopLayerColor.g * alpha + mBackgroundColor.g * (1.0 - alpha);
+                expectedColors[i].b = mTopLayerColor.b * alpha + mBackgroundColor.b * (1.0 - alpha);
+                expectedColors[i].a = mTopLayerColor.a * alpha + mBackgroundColor.a * (1.0 - alpha);
+            }
+        }
+    }
+
+   protected:
+    std::vector<std::shared_ptr<TestLayer>> mLayers;
+    IComposerClient::Color mBackgroundColor;
+    IComposerClient::Color mTopLayerColor;
+};
+
+TEST_P(GraphicsComposerBlendModeReadbackTest, None) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+
+    setBackgroundColor(BLACK);
+    setTopLayerColor(TRANSLUCENT_RED);
+    setUpLayers(IComposerClient::BlendMode::NONE);
+    setExpectedColors(expectedColors);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+// TODO: bug 116865056: Readback returns (245, 0, 0) for layer plane
+// alpha of .2, expected 10.2
+TEST_P(GraphicsComposerBlendModeReadbackTest, DISABLED_Coverage) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+
+    setBackgroundColor(BLACK);
+    setTopLayerColor(TRANSLUCENT_RED);
+
+    setUpLayers(IComposerClient::BlendMode::COVERAGE);
+    setExpectedColors(expectedColors);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_P(GraphicsComposerBlendModeReadbackTest, Premultiplied) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+
+    setBackgroundColor(BLACK);
+    setTopLayerColor(TRANSLUCENT_RED);
+    setUpLayers(IComposerClient::BlendMode::PREMULTIPLIED);
+    setExpectedColors(expectedColors);
+
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+INSTANTIATE_TEST_CASE_P(BlendModeTest, GraphicsComposerBlendModeReadbackTest,
+                        ::testing::Values(.2, 1.0));
+
+class GraphicsComposerTransformReadbackTest : public GraphicsComposerReadbackTest {
+   protected:
+    void SetUp() override {
+        GraphicsComposerReadbackTest::SetUp();
+
+        mWriter->selectDisplay(mPrimaryDisplay);
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setColorMode(mPrimaryDisplay, ColorMode::SRGB,
+                                                              RenderIntent::COLORIMETRIC));
+
+        auto backgroundLayer = std::make_shared<TestColorLayer>(mComposerClient, mPrimaryDisplay);
+        backgroundLayer->setColor({0, 0, 0, 0});
+        backgroundLayer->setDisplayFrame({0, 0, mDisplayWidth, mDisplayHeight});
+        backgroundLayer->setZOrder(0);
+
+        mSideLength = mDisplayWidth < mDisplayHeight ? mDisplayWidth : mDisplayHeight;
+        IComposerClient::Rect redRect = {0, 0, mSideLength / 2, mSideLength / 2};
+        IComposerClient::Rect blueRect = {mSideLength / 2, mSideLength / 2, mSideLength,
+                                          mSideLength};
+
+        mLayer =
+            std::make_shared<TestBufferLayer>(mComposerClient, mGralloc, mPrimaryDisplay,
+                                              mSideLength, mSideLength, PixelFormat::RGBA_8888);
+        mLayer->setDisplayFrame({0, 0, mSideLength, mSideLength});
+        mLayer->setZOrder(10);
+
+        std::vector<IComposerClient::Color> baseColors(mSideLength * mSideLength);
+        fillColorsArea(baseColors, mSideLength, redRect, RED);
+        fillColorsArea(baseColors, mSideLength, blueRect, BLUE);
+        ASSERT_NO_FATAL_FAILURE(mLayer->setBuffer(baseColors));
+
+        mLayers = {backgroundLayer, mLayer};
+    }
+
+   protected:
+    std::shared_ptr<TestBufferLayer> mLayer;
+    std::vector<IComposerClient::Color> baseColors;
+    std::vector<std::shared_ptr<TestLayer>> mLayers;
+    int mSideLength;
+};
+
+TEST_F(GraphicsComposerTransformReadbackTest, FLIP_H) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+    mLayer->setTransform(Transform::FLIP_H);
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {mSideLength / 2, 0, mSideLength, mSideLength / 2}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mSideLength / 2, mSideLength / 2, mSideLength}, BLUE);
+
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerTransformReadbackTest, FLIP_V) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    mLayer->setTransform(Transform::FLIP_V);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {0, mSideLength / 2, mSideLength / 2, mSideLength}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {mSideLength / 2, 0, mSideLength, mSideLength / 2}, BLUE);
+
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+TEST_F(GraphicsComposerTransformReadbackTest, ROT_180) {
+    if (!mHasReadbackBuffer) {
+        GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+        return;
+    }
+    ReadbackBuffer readbackBuffer(mPrimaryDisplay, mComposerClient, mGralloc, mDisplayWidth,
+                                  mDisplayHeight, mPixelFormat, mDataspace);
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.setReadbackBuffer());
+
+    mLayer->setTransform(Transform::ROT_180);
+
+    std::vector<IComposerClient::Color> expectedColors(mDisplayWidth * mDisplayHeight);
+    fillColorsArea(expectedColors, mDisplayWidth,
+                   {mSideLength / 2, mSideLength / 2, mSideLength, mSideLength}, RED);
+    fillColorsArea(expectedColors, mDisplayWidth, {0, 0, mSideLength / 2, mSideLength / 2}, BLUE);
+
+    writeLayers(mLayers);
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        clearCommandReaderState();
+        GTEST_SUCCEED();
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+    ASSERT_NO_FATAL_FAILURE(readbackBuffer.checkReadbackBuffer(expectedColors));
+}
+
+}  // anonymous namespace
+}  // namespace vts
+}  // namespace V2_2
+}  // namespace composer
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android