diff --git a/graphics/composer/2.2/vts/functional/Android.bp b/graphics/composer/2.2/vts/functional/Android.bp
index 9f7e1cd..cc24774 100644
--- a/graphics/composer/2.2/vts/functional/Android.bp
+++ b/graphics/composer/2.2/vts/functional/Android.bp
@@ -20,6 +20,7 @@
     srcs: [
         "VtsHalGraphicsComposerV2_2ReadbackTest.cpp",
         "VtsHalGraphicsComposerV2_2TargetTest.cpp",
+        "VtsHalGraphicsComposerV2_2CompositionComparisonTest.cpp",
     ],
 
     // TODO(b/64437680): Assume these libs are always available on the device.
@@ -27,9 +28,19 @@
         "libfmq",
         "libhidlbase",
         "libhidltransport",
+        "libhwbinder",
         "libsync",
+        "libui",
+        "libgui",
+        "libEGL",
+        "libGLESv1_CM",
+        "libGLESv2",
     ],
     static_libs: [
+        "librenderengine",
+        "libmath",
+        "libarect",
+        "libnativewindow",
         "android.hardware.graphics.allocator@2.0",
         "android.hardware.graphics.allocator@3.0",
         "android.hardware.graphics.common@1.1",
diff --git a/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2CompositionComparisonTest.cpp b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2CompositionComparisonTest.cpp
new file mode 100644
index 0000000..d694a5b
--- /dev/null
+++ b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2CompositionComparisonTest.cpp
@@ -0,0 +1,262 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "graphics_composer_hidl_hal_readback_tests@2.2"
+
+#include <VtsHalHidlTargetTestBase.h>
+#include <VtsHalHidlTargetTestEnvBase.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 <composer-vts/2.2/ReadbackVts.h>
+#include <composer-vts/2.2/RenderEngineVts.h>
+#include <ui/GraphicBuffer.h>
+#include <ui/GraphicBufferAllocator.h>
+#include <ui/PixelFormat.h>
+#include <ui/Rect.h>
+#include <ui/Region.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace composer {
+namespace V2_2 {
+namespace vts {
+namespace {
+
+using android::GraphicBuffer;
+using android::Rect;
+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::Config;
+using V2_1::Display;
+using V2_1::vts::TestCommandReader;
+using vts::Gralloc;
+
+// 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 GraphicsCompositionComparisonTest : public ::testing::VtsHalHidlTargetTestBase {
+  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));
+
+        setTestColorModes();
+
+        // 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>();
+
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->setPowerMode(mPrimaryDisplay, PowerMode::ON));
+
+        ASSERT_NO_FATAL_FAILURE(
+                mTestRenderEngine = std::unique_ptr<TestRenderEngine>(new TestRenderEngine(
+                        PixelFormat::RGBA_8888,
+                        renderengine::RenderEngine::USE_COLOR_MANAGEMENT |
+                                renderengine::RenderEngine::USE_HIGH_PRIORITY_CONTEXT)));
+
+        renderengine::DisplaySettings clientCompositionDisplay;
+        clientCompositionDisplay.physicalDisplay = Rect(mDisplayWidth, mDisplayHeight);
+        clientCompositionDisplay.clip = clientCompositionDisplay.physicalDisplay;
+        clientCompositionDisplay.clearRegion = Region(clientCompositionDisplay.physicalDisplay);
+
+        mTestRenderEngine->initGraphicBuffer(
+                static_cast<uint32_t>(mDisplayWidth), static_cast<uint32_t>(mDisplayHeight), 1,
+                static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN));
+        mTestRenderEngine->setDisplaySettings(clientCompositionDisplay);
+    }
+
+    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 writeLayers(const std::vector<std::shared_ptr<TestLayer>>& layers) {
+        for (auto layer : layers) {
+            layer->write(mWriter);
+        }
+        execute();
+    }
+
+    void execute() {
+        ASSERT_NO_FATAL_FAILURE(mComposerClient->execute(mReader.get(), mWriter.get()));
+    }
+
+    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::vector<ColorMode> mTestColorModes;
+    std::shared_ptr<CommandWriterBase> mWriter;
+    std::unique_ptr<TestCommandReader> mReader;
+    std::shared_ptr<Gralloc> mGralloc;
+    std::unique_ptr<TestRenderEngine> mTestRenderEngine;
+
+    bool mHasReadbackBuffer;
+    PixelFormat mPixelFormat;
+    Dataspace mDataspace;
+
+  private:
+    Display waitForFirstDisplay() {
+        while (true) {
+            std::vector<Display> displays = mComposerCallback->getDisplays();
+            if (displays.empty()) {
+                usleep(5 * 1000);
+                continue;
+            }
+            return displays[0];
+        }
+    }
+
+    void setTestColorModes() {
+        mTestColorModes.clear();
+        mComposerClient->getRaw()->getColorModes_2_2(mPrimaryDisplay, [&](const auto& tmpError,
+                                                                          const auto& tmpModes) {
+            ASSERT_EQ(Error::NONE, tmpError);
+            for (ColorMode mode : tmpModes) {
+                if (std::find(ReadbackHelper::colorModes.begin(), ReadbackHelper::colorModes.end(),
+                              mode) != ReadbackHelper::colorModes.end()) {
+                    mTestColorModes.push_back(mode);
+                }
+            }
+        });
+    }
+};
+
+TEST_F(GraphicsCompositionComparisonTest, SingleSolidColorLayer) {
+    for (ColorMode mode : mTestColorModes) {
+        std::cout << "---Testing Color Mode " << ReadbackHelper::getColorModeString(mode) << "---"
+                  << std::endl;
+        mWriter->selectDisplay(mPrimaryDisplay);
+        ASSERT_NO_FATAL_FAILURE(
+                mComposerClient->setColorMode(mPrimaryDisplay, mode, RenderIntent::COLORIMETRIC));
+
+        mComposerClient->getRaw()->getReadbackBufferAttributes(
+                mPrimaryDisplay,
+                [&](const auto& tmpError, const auto& tmpPixelFormat, const auto& tmpDataspace) {
+                    mHasReadbackBuffer = ReadbackHelper::readbackSupported(tmpPixelFormat,
+                                                                           tmpDataspace, tmpError);
+                    mPixelFormat = tmpPixelFormat;
+                    mDataspace = tmpDataspace;
+                });
+
+        if (!mHasReadbackBuffer) {
+            std::cout << "Readback not supported or unsupported pixelFormat/dataspace" << std::endl;
+            GTEST_SUCCEED() << "Readback not supported or unsupported pixelFormat/dataspace";
+            return;
+        }
+
+        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);
+        ReadbackHelper::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));
+        mTestRenderEngine->setRenderLayers(layers);
+        ASSERT_NO_FATAL_FAILURE(mTestRenderEngine->drawLayers());
+        ASSERT_NO_FATAL_FAILURE(mTestRenderEngine->checkColorBuffer(expectedColors));
+    }
+}
+
+}  // namespace
+}  // namespace vts
+}  // namespace V2_2
+}  // namespace composer
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
diff --git a/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp
index 6b30df7..72c9496 100644
--- a/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp
+++ b/graphics/composer/2.2/vts/functional/VtsHalGraphicsComposerV2_2ReadbackTest.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 The Android Open Source Project
+ * 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.