libs/gui/tests/RegionSampling_test.cpp - third_party/android/platform/frameworks/native - Git at Google

 /*
  * 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 <gtest/gtest.h>
 #include <thread>

 #include <binder/ProcessState.h>
 #include <gui/DisplayEventReceiver.h>
 #include <gui/IRegionSamplingListener.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/Surface.h>
 #include <gui/SurfaceComposerClient.h>
 #include <private/gui/ComposerService.h>
 #include <utils/Looper.h>

 using namespace std::chrono_literals;

 namespace android::test {

 struct ChoreographerSync {
     ChoreographerSync(DisplayEventReceiver& receiver) : receiver_(receiver) {}
     ~ChoreographerSync() = default;

     void notify() const {
         std::unique_lock<decltype(mutex_)> lk(mutex_);

         auto check_event = [](auto const& ev) -> bool {
             return ev.header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
         };
         DisplayEventReceiver::Event ev_;
         int evs = receiver_.getEvents(&ev_, 1);
         auto vsync_event_found = check_event(ev_);
         while (evs) {
             evs = receiver_.getEvents(&ev_, 1);
             vsync_event_found |= check_event(ev_);
         }

         if (vsync_event_found) {
             notification_arrived_ = true;
             cv_.notify_all();
         }
     }

     void wait_vsync_notify() const {
         std::unique_lock<decltype(mutex_)> lk(mutex_);
         cv_.wait(lk, [this] { return notification_arrived_; });
         notification_arrived_ = false;
     }

 private:
     ChoreographerSync(ChoreographerSync const&) = delete;
     ChoreographerSync& operator=(ChoreographerSync const&) = delete;

     std::mutex mutable mutex_;
     std::condition_variable mutable cv_;
     bool mutable notification_arrived_ = false;
     DisplayEventReceiver& receiver_;
 };

 struct ChoreographerSim {
     static std::unique_ptr<ChoreographerSim> make() {
         auto receiver = std::make_unique<DisplayEventReceiver>();
         if (!receiver || receiver->initCheck() == NO_INIT) {
             ALOGE("No display reciever");
             return nullptr;
         }
         return std::unique_ptr<ChoreographerSim>(new ChoreographerSim(std::move(receiver)));
     }

     ~ChoreographerSim() {
         poll_ = false;
         looper->wake();
         choreographer_thread_.join();
     }

     void request_render_wait(std::function<void()> const& render_fn) {
         display_event_receiver_->requestNextVsync();
         choreographer_.wait_vsync_notify();
         render_fn();

         // Purpose is to make sure that the content is latched by the time we sample.
         // Waiting one vsync after queueing could still race with vsync, so wait for two, after
         // which the content is pretty reliably on screen.
         display_event_receiver_->requestNextVsync();
         choreographer_.wait_vsync_notify();
         display_event_receiver_->requestNextVsync();
         choreographer_.wait_vsync_notify();
     }

 private:
     ChoreographerSim(std::unique_ptr<DisplayEventReceiver> receiver)
           : display_event_receiver_{std::move(receiver)},
             choreographer_{*display_event_receiver_},
             looper{new Looper(false)} {
         choreographer_thread_ = std::thread([this] {
             auto vsync_notify_fd = display_event_receiver_->getFd();
             looper->addFd(vsync_notify_fd, 0, Looper::EVENT_INPUT,
                           [](int /*fd*/, int /*events*/, void* data) -> int {
                               if (!data) return 0;
                               reinterpret_cast<ChoreographerSync*>(data)->notify();
                               return 1;
                           },
                           const_cast<void*>(reinterpret_cast<void const*>(&choreographer_)));

             while (poll_) {
                 auto const poll_interval =
                         std::chrono::duration_cast<std::chrono::milliseconds>(1s).count();
                 auto rc = looper->pollOnce(poll_interval);
                 if ((rc != Looper::POLL_CALLBACK) && (rc != Looper::POLL_WAKE))
                     ALOGW("Vsync Looper returned: %i\n", rc);
             }
         });
     }

     ChoreographerSim(ChoreographerSim const&) = delete;
     ChoreographerSim& operator=(ChoreographerSim const&) = delete;

     std::unique_ptr<DisplayEventReceiver> const display_event_receiver_;
     ChoreographerSync const choreographer_;
     sp<Looper> looper;
     std::thread choreographer_thread_;
     std::atomic<bool> poll_{true};
 };

 struct Listener : BnRegionSamplingListener {
     void onSampleCollected(float medianLuma) override {
         std::unique_lock<decltype(mutex)> lk(mutex);
         received = true;
         mLuma = medianLuma;
         cv.notify_all();
     };
     bool wait_event(std::chrono::milliseconds timeout) {
         std::unique_lock<decltype(mutex)> lk(mutex);
         return cv.wait_for(lk, timeout, [this] { return received; });
     }

     float luma() {
         std::unique_lock<decltype(mutex)> lk(mutex);
         return mLuma;
     }

     void reset() {
         std::unique_lock<decltype(mutex)> lk(mutex);
         received = false;
     }

 private:
     std::condition_variable cv;
     std::mutex mutex;
     bool received = false;
     float mLuma = -0.0f;
 };

 // Hoisted to TestSuite setup to avoid flake in test (b/124675919)
 std::unique_ptr<ChoreographerSim> gChoreographerSim = nullptr;

 struct RegionSamplingTest : ::testing::Test {
 protected:
     RegionSamplingTest() { ProcessState::self()->startThreadPool(); }

     static void SetUpTestSuite() {
         gChoreographerSim = ChoreographerSim::make();
         ASSERT_NE(gChoreographerSim, nullptr);
     }

     void SetUp() override {
         mSurfaceComposerClient = new SurfaceComposerClient;
         ASSERT_EQ(NO_ERROR, mSurfaceComposerClient->initCheck());

         mBackgroundLayer =
                 mSurfaceComposerClient->createSurface(String8("Background RegionSamplingTest"), 0,
                                                       0, PIXEL_FORMAT_RGBA_8888,
                                                       ISurfaceComposerClient::eFXSurfaceEffect);
         uint32_t layerPositionBottom = 0x7E000000;
         SurfaceComposerClient::Transaction{}
                 .setLayer(mBackgroundLayer, layerPositionBottom)
                 .setPosition(mBackgroundLayer, 100, 100)
                 .setColor(mBackgroundLayer, half3{0.5, 0.5, 0.5})
                 .show(mBackgroundLayer)
                 .apply();

         mContentLayer = mSurfaceComposerClient->createSurface(String8("Content RegionSamplingTest"),
                                                               300, 300, PIXEL_FORMAT_RGBA_8888, 0);

         SurfaceComposerClient::Transaction{}
                 .setLayer(mContentLayer, layerPositionBottom + 1)
                 .setPosition(mContentLayer, 100, 100)
                 .setColor(mContentLayer, half3{0.5, 0.5, 0.5})
                 .show(mContentLayer)
                 .apply();

         mTopLayer = mSurfaceComposerClient->createSurface(String8("TopLayer RegionSamplingTest"), 0,
                                                           0, PIXEL_FORMAT_RGBA_8888, 0);
         SurfaceComposerClient::Transaction{}
                 .setLayer(mTopLayer, layerPositionBottom + 2)
                 .setPosition(mTopLayer, 0, 0)
                 .show(mBackgroundLayer)
                 .apply();
     }

     void fill_render(uint32_t rgba_value) {
         auto surface = mContentLayer->getSurface();
         ANativeWindow_Buffer outBuffer;
         status_t status = surface->lock(&outBuffer, NULL);
         ASSERT_EQ(status, android::OK);
         auto b = reinterpret_cast<uint32_t*>(outBuffer.bits);
         for (auto i = 0; i < outBuffer.height; i++) {
             for (auto j = 0; j < outBuffer.width; j++) {
                 b[j] = rgba_value;
             }
             b += outBuffer.stride;
         }

         gChoreographerSim->request_render_wait([&surface] { surface->unlockAndPost(); });
     }

     sp<SurfaceComposerClient> mSurfaceComposerClient;
     sp<SurfaceControl> mBackgroundLayer;
     sp<SurfaceControl> mContentLayer;
     sp<SurfaceControl> mTopLayer;

     uint32_t const rgba_green = 0xFF00FF00;
     float const luma_green = 0.7152;
     uint32_t const rgba_blue = 0xFFFF0000;
     float const luma_blue = 0.0722;
     float const error_margin = 0.01;
     float const luma_gray = 0.50;
 };

 TEST_F(RegionSamplingTest, invalidLayerHandle_doesNotCrash) {
     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     const Rect sampleArea{100, 100, 200, 200};
     // Passing in composer service as the layer handle should not crash, we'll
     // treat it as a layer that no longer exists and silently allow sampling to
     // occur.
     status_t status = composer->addRegionSamplingListener(sampleArea,
                                                           IInterface::asBinder(composer), listener);
     ASSERT_EQ(NO_ERROR, status);
     composer->removeRegionSamplingListener(listener);
 }

 TEST_F(RegionSamplingTest, DISABLED_CollectsLuma) {
     fill_render(rgba_green);

     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     const Rect sampleArea{100, 100, 200, 200};
     composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);

     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_green, error_margin);

     composer->removeRegionSamplingListener(listener);
 }

 TEST_F(RegionSamplingTest, DISABLED_CollectsChangingLuma) {
     fill_render(rgba_green);

     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     const Rect sampleArea{100, 100, 200, 200};
     composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);

     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_green, error_margin);

     listener->reset();

     fill_render(rgba_blue);
     EXPECT_TRUE(listener->wait_event(300ms))
             << "timed out waiting for 2nd luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_blue, error_margin);

     composer->removeRegionSamplingListener(listener);
 }

 TEST_F(RegionSamplingTest, DISABLED_CollectsLumaFromTwoRegions) {
     fill_render(rgba_green);
     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> greenListener = new Listener();
     const Rect greenSampleArea{100, 100, 200, 200};
     composer->addRegionSamplingListener(greenSampleArea, mTopLayer->getHandle(), greenListener);

     sp<Listener> grayListener = new Listener();
     const Rect graySampleArea{500, 100, 600, 200};
     composer->addRegionSamplingListener(graySampleArea, mTopLayer->getHandle(), grayListener);

     EXPECT_TRUE(grayListener->wait_event(300ms))
             << "timed out waiting for luma event to be received";
     EXPECT_NEAR(grayListener->luma(), luma_gray, error_margin);
     EXPECT_TRUE(greenListener->wait_event(300ms))
             << "timed out waiting for luma event to be received";
     EXPECT_NEAR(greenListener->luma(), luma_green, error_margin);

     composer->removeRegionSamplingListener(greenListener);
     composer->removeRegionSamplingListener(grayListener);
 }

 TEST_F(RegionSamplingTest, DISABLED_TestIfInvalidInputParameters) {
     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     const Rect sampleArea{100, 100, 200, 200};
     // Invalid input sampleArea
     EXPECT_EQ(BAD_VALUE,
               composer->addRegionSamplingListener(Rect::INVALID_RECT, mTopLayer->getHandle(),
                                                   listener));
     listener->reset();
     // Invalid input binder
     EXPECT_EQ(NO_ERROR, composer->addRegionSamplingListener(sampleArea, NULL, listener));
     // Invalid input listener
     EXPECT_EQ(BAD_VALUE,
               composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), NULL));
     EXPECT_EQ(BAD_VALUE, composer->removeRegionSamplingListener(NULL));
     // remove the listener
     composer->removeRegionSamplingListener(listener);
 }

 TEST_F(RegionSamplingTest, DISABLED_TestCallbackAfterRemoveListener) {
     fill_render(rgba_green);
     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     const Rect sampleArea{100, 100, 200, 200};
     composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
     fill_render(rgba_green);

     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_green, error_margin);

     listener->reset();
     composer->removeRegionSamplingListener(listener);
     fill_render(rgba_green);
     EXPECT_FALSE(listener->wait_event(100ms))
             << "callback should stop after remove the region sampling listener";
 }

 TEST_F(RegionSamplingTest, DISABLED_CollectsLumaFromMovingLayer) {
     sp<ISurfaceComposer> composer = ComposerService::getComposerService();
     sp<Listener> listener = new Listener();
     Rect sampleArea{100, 100, 200, 200};

     // Test: listener in (100, 100). See layer before move, no layer after move.
     fill_render(rgba_blue);
     composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_blue, error_margin);
     listener->reset();
     SurfaceComposerClient::Transaction{}.setPosition(mContentLayer, 600, 600).apply();
     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_gray, error_margin);
     composer->removeRegionSamplingListener(listener);

     // Test: listener offset to (600, 600). No layer before move, see layer after move.
     fill_render(rgba_green);
     sampleArea.offsetTo(600, 600);
     composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_gray, error_margin);
     listener->reset();
     SurfaceComposerClient::Transaction{}.setPosition(mContentLayer, 600, 600).apply();
     EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
     EXPECT_NEAR(listener->luma(), luma_green, error_margin);
     composer->removeRegionSamplingListener(listener);
 }

 } // namespace android::test
	/*
	* 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 <gtest/gtest.h>
	#include <thread>

	#include <binder/ProcessState.h>
	#include <gui/DisplayEventReceiver.h>
	#include <gui/IRegionSamplingListener.h>
	#include <gui/ISurfaceComposer.h>
	#include <gui/Surface.h>
	#include <gui/SurfaceComposerClient.h>
	#include <private/gui/ComposerService.h>
	#include <utils/Looper.h>

	using namespace std::chrono_literals;

	namespace android::test {

	struct ChoreographerSync {
	ChoreographerSync(DisplayEventReceiver& receiver) : receiver_(receiver) {}
	~ChoreographerSync() = default;

	void notify() const {
	std::unique_lock<decltype(mutex_)> lk(mutex_);

	auto check_event = [](auto const& ev) -> bool {
	return ev.header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
	};
	DisplayEventReceiver::Event ev_;
	int evs = receiver_.getEvents(&ev_, 1);
	auto vsync_event_found = check_event(ev_);
	while (evs) {
	evs = receiver_.getEvents(&ev_, 1);
	vsync_event_found \|= check_event(ev_);
	}

	if (vsync_event_found) {
	notification_arrived_ = true;
	cv_.notify_all();
	}
	}

	void wait_vsync_notify() const {
	std::unique_lock<decltype(mutex_)> lk(mutex_);
	cv_.wait(lk, [this] { return notification_arrived_; });
	notification_arrived_ = false;
	}

	private:
	ChoreographerSync(ChoreographerSync const&) = delete;
	ChoreographerSync& operator=(ChoreographerSync const&) = delete;

	std::mutex mutable mutex_;
	std::condition_variable mutable cv_;
	bool mutable notification_arrived_ = false;
	DisplayEventReceiver& receiver_;
	};

	struct ChoreographerSim {
	static std::unique_ptr<ChoreographerSim> make() {
	auto receiver = std::make_unique<DisplayEventReceiver>();
	if (!receiver \|\| receiver->initCheck() == NO_INIT) {
	ALOGE("No display reciever");
	return nullptr;
	}
	return std::unique_ptr<ChoreographerSim>(new ChoreographerSim(std::move(receiver)));
	}

	~ChoreographerSim() {
	poll_ = false;
	looper->wake();
	choreographer_thread_.join();
	}

	void request_render_wait(std::function<void()> const& render_fn) {
	display_event_receiver_->requestNextVsync();
	choreographer_.wait_vsync_notify();
	render_fn();

	// Purpose is to make sure that the content is latched by the time we sample.
	// Waiting one vsync after queueing could still race with vsync, so wait for two, after
	// which the content is pretty reliably on screen.
	display_event_receiver_->requestNextVsync();
	choreographer_.wait_vsync_notify();
	display_event_receiver_->requestNextVsync();
	choreographer_.wait_vsync_notify();
	}

	private:
	ChoreographerSim(std::unique_ptr<DisplayEventReceiver> receiver)
	: display_event_receiver_{std::move(receiver)},
	choreographer_{*display_event_receiver_},
	looper{new Looper(false)} {
	choreographer_thread_ = std::thread([this] {
	auto vsync_notify_fd = display_event_receiver_->getFd();
	looper->addFd(vsync_notify_fd, 0, Looper::EVENT_INPUT,
	[](int /fd/, int /events/, void* data) -> int {
	if (!data) return 0;
	reinterpret_cast<ChoreographerSync*>(data)->notify();
	return 1;
	},
	const_cast<void>(reinterpret_cast<void const>(&choreographer_)));

	while (poll_) {
	auto const poll_interval =
	std::chrono::duration_cast<std::chrono::milliseconds>(1s).count();
	auto rc = looper->pollOnce(poll_interval);
	if ((rc != Looper::POLL_CALLBACK) && (rc != Looper::POLL_WAKE))
	ALOGW("Vsync Looper returned: %i\n", rc);
	}
	});
	}

	ChoreographerSim(ChoreographerSim const&) = delete;
	ChoreographerSim& operator=(ChoreographerSim const&) = delete;

	std::unique_ptr<DisplayEventReceiver> const display_event_receiver_;
	ChoreographerSync const choreographer_;
	sp<Looper> looper;
	std::thread choreographer_thread_;
	std::atomic<bool> poll_{true};
	};

	struct Listener : BnRegionSamplingListener {
	void onSampleCollected(float medianLuma) override {
	std::unique_lock<decltype(mutex)> lk(mutex);
	received = true;
	mLuma = medianLuma;
	cv.notify_all();
	};
	bool wait_event(std::chrono::milliseconds timeout) {
	std::unique_lock<decltype(mutex)> lk(mutex);
	return cv.wait_for(lk, timeout, [this] { return received; });
	}

	float luma() {
	std::unique_lock<decltype(mutex)> lk(mutex);
	return mLuma;
	}

	void reset() {
	std::unique_lock<decltype(mutex)> lk(mutex);
	received = false;
	}

	private:
	std::condition_variable cv;
	std::mutex mutex;
	bool received = false;
	float mLuma = -0.0f;
	};

	// Hoisted to TestSuite setup to avoid flake in test (b/124675919)
	std::unique_ptr<ChoreographerSim> gChoreographerSim = nullptr;

	struct RegionSamplingTest : ::testing::Test {
	protected:
	RegionSamplingTest() { ProcessState::self()->startThreadPool(); }

	static void SetUpTestSuite() {
	gChoreographerSim = ChoreographerSim::make();
	ASSERT_NE(gChoreographerSim, nullptr);
	}

	void SetUp() override {
	mSurfaceComposerClient = new SurfaceComposerClient;
	ASSERT_EQ(NO_ERROR, mSurfaceComposerClient->initCheck());

	mBackgroundLayer =
	mSurfaceComposerClient->createSurface(String8("Background RegionSamplingTest"), 0,
	0, PIXEL_FORMAT_RGBA_8888,
	ISurfaceComposerClient::eFXSurfaceEffect);
	uint32_t layerPositionBottom = 0x7E000000;
	SurfaceComposerClient::Transaction{}
	.setLayer(mBackgroundLayer, layerPositionBottom)
	.setPosition(mBackgroundLayer, 100, 100)
	.setColor(mBackgroundLayer, half3{0.5, 0.5, 0.5})
	.show(mBackgroundLayer)
	.apply();

	mContentLayer = mSurfaceComposerClient->createSurface(String8("Content RegionSamplingTest"),
	300, 300, PIXEL_FORMAT_RGBA_8888, 0);

	SurfaceComposerClient::Transaction{}
	.setLayer(mContentLayer, layerPositionBottom + 1)
	.setPosition(mContentLayer, 100, 100)
	.setColor(mContentLayer, half3{0.5, 0.5, 0.5})
	.show(mContentLayer)
	.apply();

	mTopLayer = mSurfaceComposerClient->createSurface(String8("TopLayer RegionSamplingTest"), 0,
	0, PIXEL_FORMAT_RGBA_8888, 0);
	SurfaceComposerClient::Transaction{}
	.setLayer(mTopLayer, layerPositionBottom + 2)
	.setPosition(mTopLayer, 0, 0)
	.show(mBackgroundLayer)
	.apply();
	}

	void fill_render(uint32_t rgba_value) {
	auto surface = mContentLayer->getSurface();
	ANativeWindow_Buffer outBuffer;
	status_t status = surface->lock(&outBuffer, NULL);
	ASSERT_EQ(status, android::OK);
	auto b = reinterpret_cast<uint32_t*>(outBuffer.bits);
	for (auto i = 0; i < outBuffer.height; i++) {
	for (auto j = 0; j < outBuffer.width; j++) {
	b[j] = rgba_value;
	}
	b += outBuffer.stride;
	}

	gChoreographerSim->request_render_wait([&surface] { surface->unlockAndPost(); });
	}

	sp<SurfaceComposerClient> mSurfaceComposerClient;
	sp<SurfaceControl> mBackgroundLayer;
	sp<SurfaceControl> mContentLayer;
	sp<SurfaceControl> mTopLayer;

	uint32_t const rgba_green = 0xFF00FF00;
	float const luma_green = 0.7152;
	uint32_t const rgba_blue = 0xFFFF0000;
	float const luma_blue = 0.0722;
	float const error_margin = 0.01;
	float const luma_gray = 0.50;
	};

	TEST_F(RegionSamplingTest, invalidLayerHandle_doesNotCrash) {
	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	const Rect sampleArea{100, 100, 200, 200};
	// Passing in composer service as the layer handle should not crash, we'll
	// treat it as a layer that no longer exists and silently allow sampling to
	// occur.
	status_t status = composer->addRegionSamplingListener(sampleArea,
	IInterface::asBinder(composer), listener);
	ASSERT_EQ(NO_ERROR, status);
	composer->removeRegionSamplingListener(listener);
	}

	TEST_F(RegionSamplingTest, DISABLED_CollectsLuma) {
	fill_render(rgba_green);

	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	const Rect sampleArea{100, 100, 200, 200};
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);

	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_green, error_margin);

	composer->removeRegionSamplingListener(listener);
	}

	TEST_F(RegionSamplingTest, DISABLED_CollectsChangingLuma) {
	fill_render(rgba_green);

	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	const Rect sampleArea{100, 100, 200, 200};
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);

	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_green, error_margin);

	listener->reset();

	fill_render(rgba_blue);
	EXPECT_TRUE(listener->wait_event(300ms))
	<< "timed out waiting for 2nd luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_blue, error_margin);

	composer->removeRegionSamplingListener(listener);
	}

	TEST_F(RegionSamplingTest, DISABLED_CollectsLumaFromTwoRegions) {
	fill_render(rgba_green);
	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> greenListener = new Listener();
	const Rect greenSampleArea{100, 100, 200, 200};
	composer->addRegionSamplingListener(greenSampleArea, mTopLayer->getHandle(), greenListener);

	sp<Listener> grayListener = new Listener();
	const Rect graySampleArea{500, 100, 600, 200};
	composer->addRegionSamplingListener(graySampleArea, mTopLayer->getHandle(), grayListener);

	EXPECT_TRUE(grayListener->wait_event(300ms))
	<< "timed out waiting for luma event to be received";
	EXPECT_NEAR(grayListener->luma(), luma_gray, error_margin);
	EXPECT_TRUE(greenListener->wait_event(300ms))
	<< "timed out waiting for luma event to be received";
	EXPECT_NEAR(greenListener->luma(), luma_green, error_margin);

	composer->removeRegionSamplingListener(greenListener);
	composer->removeRegionSamplingListener(grayListener);
	}

	TEST_F(RegionSamplingTest, DISABLED_TestIfInvalidInputParameters) {
	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	const Rect sampleArea{100, 100, 200, 200};
	// Invalid input sampleArea
	EXPECT_EQ(BAD_VALUE,
	composer->addRegionSamplingListener(Rect::INVALID_RECT, mTopLayer->getHandle(),
	listener));
	listener->reset();
	// Invalid input binder
	EXPECT_EQ(NO_ERROR, composer->addRegionSamplingListener(sampleArea, NULL, listener));
	// Invalid input listener
	EXPECT_EQ(BAD_VALUE,
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), NULL));
	EXPECT_EQ(BAD_VALUE, composer->removeRegionSamplingListener(NULL));
	// remove the listener
	composer->removeRegionSamplingListener(listener);
	}

	TEST_F(RegionSamplingTest, DISABLED_TestCallbackAfterRemoveListener) {
	fill_render(rgba_green);
	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	const Rect sampleArea{100, 100, 200, 200};
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
	fill_render(rgba_green);

	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_green, error_margin);

	listener->reset();
	composer->removeRegionSamplingListener(listener);
	fill_render(rgba_green);
	EXPECT_FALSE(listener->wait_event(100ms))
	<< "callback should stop after remove the region sampling listener";
	}

	TEST_F(RegionSamplingTest, DISABLED_CollectsLumaFromMovingLayer) {
	sp<ISurfaceComposer> composer = ComposerService::getComposerService();
	sp<Listener> listener = new Listener();
	Rect sampleArea{100, 100, 200, 200};

	// Test: listener in (100, 100). See layer before move, no layer after move.
	fill_render(rgba_blue);
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_blue, error_margin);
	listener->reset();
	SurfaceComposerClient::Transaction{}.setPosition(mContentLayer, 600, 600).apply();
	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_gray, error_margin);
	composer->removeRegionSamplingListener(listener);

	// Test: listener offset to (600, 600). No layer before move, see layer after move.
	fill_render(rgba_green);
	sampleArea.offsetTo(600, 600);
	composer->addRegionSamplingListener(sampleArea, mTopLayer->getHandle(), listener);
	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_gray, error_margin);
	listener->reset();
	SurfaceComposerClient::Transaction{}.setPosition(mContentLayer, 600, 600).apply();
	EXPECT_TRUE(listener->wait_event(300ms)) << "timed out waiting for luma event to be received";
	EXPECT_NEAR(listener->luma(), luma_green, error_margin);
	composer->removeRegionSamplingListener(listener);
	}

	} // namespace android::test