services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright (C) 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.
  */

 #pragma once

 #include "DisplayDevice.h"
 #include "SurfaceFlinger.h"

 namespace android {

 class EventThread;

 namespace RE {
 class RenderEngine;
 }

 namespace Hwc2 {
 class Composer;
 }

 class TestableSurfaceFlinger {
 public:
     // Extend this as needed for accessing SurfaceFlinger private (and public)
     // functions.

     void setupRenderEngine(std::unique_ptr<RE::RenderEngine> renderEngine) {
         mFlinger->getBE().mRenderEngine = std::move(renderEngine);
     }

     void setupComposer(std::unique_ptr<Hwc2::Composer> composer) {
         mFlinger->getBE().mHwc.reset(new HWComposer(std::move(composer)));
     }

     using CreateBufferQueueFunction = SurfaceFlinger::CreateBufferQueueFunction;
     void setCreateBufferQueueFunction(CreateBufferQueueFunction f) {
         mFlinger->mCreateBufferQueue = f;
     }

     using CreateNativeWindowSurfaceFunction = SurfaceFlinger::CreateNativeWindowSurfaceFunction;
     void setCreateNativeWindowSurface(CreateNativeWindowSurfaceFunction f) {
         mFlinger->mCreateNativeWindowSurface = f;
     }

     using HotplugEvent = SurfaceFlinger::HotplugEvent;

     /* ------------------------------------------------------------------------
      * Forwarding for functions being tested
      */

     auto createDisplay(const String8& displayName, bool secure) {
         return mFlinger->createDisplay(displayName, secure);
     }

     auto destroyDisplay(const sp<IBinder>& displayToken) {
         return mFlinger->destroyDisplay(displayToken);
     }

     auto resetDisplayState() { return mFlinger->resetDisplayState(); }

     auto setupNewDisplayDeviceInternal(const wp<IBinder>& displayToken, int32_t displayId,
                                        const DisplayDeviceState& state,
                                        const sp<DisplaySurface>& dispSurface,
                                        const sp<IGraphicBufferProducer>& producer) {
         return mFlinger->setupNewDisplayDeviceInternal(displayToken, displayId, state, dispSurface,
                                                        producer);
     }

     auto handleTransactionLocked(uint32_t transactionFlags) {
         return mFlinger->handleTransactionLocked(transactionFlags);
     }

     auto onHotplugReceived(int32_t sequenceId, hwc2_display_t display,
                            HWC2::Connection connection) {
         return mFlinger->onHotplugReceived(sequenceId, display, connection);
     }

     auto setDisplayStateLocked(const DisplayState& s) { return mFlinger->setDisplayStateLocked(s); }

     auto onInitializeDisplays() { return mFlinger->onInitializeDisplays(); }

     auto setPowerModeInternal(const sp<DisplayDevice>& display, int mode,
                               bool stateLockHeld = false) {
         return mFlinger->setPowerModeInternal(display, mode, stateLockHeld);
     }

     /* ------------------------------------------------------------------------
      * Read-only access to private data to assert post-conditions.
      */

     const auto& getAnimFrameTracker() const { return mFlinger->mAnimFrameTracker; }
     const auto& getHasPoweredOff() const { return mFlinger->mHasPoweredOff; }
     const auto& getHWVsyncAvailable() const { return mFlinger->mHWVsyncAvailable; }
     const auto& getVisibleRegionsDirty() const { return mFlinger->mVisibleRegionsDirty; }

     const auto& getCompositorTiming() const { return mFlinger->getBE().mCompositorTiming; }

     /* ------------------------------------------------------------------------
      * Read-write access to private data to set up preconditions and assert
      * post-conditions.
      */

     auto& mutableHasWideColorDisplay() { return SurfaceFlinger::hasWideColorDisplay; }
     auto& mutableUseColorManagement() { return SurfaceFlinger::useColorManagement; }

     auto& mutableDisplayTokens() { return mFlinger->mDisplayTokens; }
     auto& mutableCurrentState() { return mFlinger->mCurrentState; }
     auto& mutableDisplays() { return mFlinger->mDisplays; }
     auto& mutableDisplayColorSetting() { return mFlinger->mDisplayColorSetting; }
     auto& mutableDrawingState() { return mFlinger->mDrawingState; }
     auto& mutableEventControlThread() { return mFlinger->mEventControlThread; }
     auto& mutableEventQueue() { return mFlinger->mEventQueue; }
     auto& mutableEventThread() { return mFlinger->mEventThread; }
     auto& mutableHWVsyncAvailable() { return mFlinger->mHWVsyncAvailable; }
     auto& mutableInterceptor() { return mFlinger->mInterceptor; }
     auto& mutableMainThreadId() { return mFlinger->mMainThreadId; }
     auto& mutablePendingHotplugEvents() { return mFlinger->mPendingHotplugEvents; }
     auto& mutablePrimaryDispSync() { return mFlinger->mPrimaryDispSync; }
     auto& mutablePrimaryHWVsyncEnabled() { return mFlinger->mPrimaryHWVsyncEnabled; }
     auto& mutableTransactionFlags() { return mFlinger->mTransactionFlags; }
     auto& mutableUseHwcVirtualDisplays() { return mFlinger->mUseHwcVirtualDisplays; }

     auto& mutableComposerSequenceId() { return mFlinger->getBE().mComposerSequenceId; }
     auto& mutableHwcDisplayData() { return mFlinger->getBE().mHwc->mDisplayData; }
     auto& mutableHwcDisplaySlots() { return mFlinger->getBE().mHwc->mHwcDisplaySlots; }

     ~TestableSurfaceFlinger() {
         // All these pointer and container clears help ensure that GMock does
         // not report a leaked object, since the SurfaceFlinger instance may
         // still be referenced by something despite our best efforts to destroy
         // it after each test is done.
         mutableDisplays().clear();
         mutableEventControlThread().reset();
         mutableEventQueue().reset();
         mutableEventThread().reset();
         mutableInterceptor().reset();
         mutablePrimaryDispSync().reset();
         mFlinger->getBE().mHwc.reset();
         mFlinger->getBE().mRenderEngine.reset();
     }

     /* ------------------------------------------------------------------------
      * Wrapper classes for Read-write access to private data to set up
      * preconditions and assert post-conditions.
      */
     class FakePowerAdvisor : public Hwc2::PowerAdvisor {
     public:
         FakePowerAdvisor() = default;
         ~FakePowerAdvisor() override = default;
         void setExpensiveRenderingExpected(hwc2_display_t, bool) override { }
     };

     struct HWC2Display : public HWC2::Display {
         HWC2Display(Hwc2::Composer& composer, Hwc2::PowerAdvisor& advisor,
                     const std::unordered_set<HWC2::Capability>& capabilities, hwc2_display_t id,
                     HWC2::DisplayType type)
               : HWC2::Display(composer, advisor, capabilities, id, type) {}
         ~HWC2Display() {
             // Prevents a call to disable vsyncs.
             mType = HWC2::DisplayType::Invalid;
         }

         auto& mutableIsConnected() { return this->mIsConnected; }
         auto& mutableConfigs() { return this->mConfigs; }
     };

     class FakeHwcDisplayInjector {
     public:
         static constexpr hwc2_display_t DEFAULT_HWC_DISPLAY_ID = 1000;
         static constexpr int32_t DEFAULT_WIDTH = 1920;
         static constexpr int32_t DEFAULT_HEIGHT = 1280;
         static constexpr int32_t DEFAULT_REFRESH_RATE = 16'666'666;
         static constexpr int32_t DEFAULT_DPI = 320;
         static constexpr int32_t DEFAULT_ACTIVE_CONFIG = 0;

         FakeHwcDisplayInjector(DisplayDevice::DisplayType type, HWC2::DisplayType hwcDisplayType)
               : mType(type), mHwcDisplayType(hwcDisplayType) {}

         auto& setHwcDisplayId(hwc2_display_t displayId) {
             mHwcDisplayId = displayId;
             return *this;
         }

         auto& setWidth(int32_t width) {
             mWidth = width;
             return *this;
         }

         auto& setHeight(int32_t height) {
             mHeight = height;
             return *this;
         }

         auto& setRefreshRate(int32_t refreshRate) {
             mRefreshRate = refreshRate;
             return *this;
         }

         auto& setDpiX(int32_t dpi) {
             mDpiX = dpi;
             return *this;
         }

         auto& setDpiY(int32_t dpi) {
             mDpiY = dpi;
             return *this;
         }

         auto& setActiveConfig(int32_t config) {
             mActiveConfig = config;
             return *this;
         }

         auto& setCapabilities(const std::unordered_set<HWC2::Capability>* capabilities) {
             mCapabilities = capabilities;
             return *this;
         }

         auto& setPowerAdvisor(Hwc2::PowerAdvisor* powerAdvisor) {
             mPowerAdvisor = powerAdvisor;
             return *this;
         }

         void inject(TestableSurfaceFlinger* flinger, Hwc2::Composer* composer) {
             static FakePowerAdvisor defaultPowerAdvisor;
             if (mPowerAdvisor == nullptr) mPowerAdvisor = &defaultPowerAdvisor;
             static const std::unordered_set<HWC2::Capability> defaultCapabilities;
             if (mCapabilities == nullptr) mCapabilities = &defaultCapabilities;

             // Caution - Make sure that any values passed by reference here do
             // not refer to an instance owned by FakeHwcDisplayInjector. This
             // class has temporary lifetime, while the constructed HWC2::Display
             // is much longer lived.
             auto display = std::make_unique<HWC2Display>(*composer, *mPowerAdvisor, *mCapabilities,
                                                          mHwcDisplayId, mHwcDisplayType);

             auto config = HWC2::Display::Config::Builder(*display, mActiveConfig);
             config.setWidth(mWidth);
             config.setHeight(mHeight);
             config.setVsyncPeriod(mRefreshRate);
             config.setDpiX(mDpiX);
             config.setDpiY(mDpiY);
             display->mutableConfigs().emplace(mActiveConfig, config.build());
             display->mutableIsConnected() = true;

             ASSERT_TRUE(flinger->mutableHwcDisplayData().size() > static_cast<size_t>(mType));
             flinger->mutableHwcDisplayData()[mType] = HWComposer::DisplayData();
             flinger->mutableHwcDisplayData()[mType].hwcDisplay = display.get();
             flinger->mutableHwcDisplaySlots().emplace(mHwcDisplayId, mType);

             flinger->mFakeHwcDisplays.push_back(std::move(display));
         }

     private:
         DisplayDevice::DisplayType mType;
         HWC2::DisplayType mHwcDisplayType;
         hwc2_display_t mHwcDisplayId = DEFAULT_HWC_DISPLAY_ID;
         int32_t mWidth = DEFAULT_WIDTH;
         int32_t mHeight = DEFAULT_HEIGHT;
         int32_t mRefreshRate = DEFAULT_REFRESH_RATE;
         int32_t mDpiX = DEFAULT_DPI;
         int32_t mDpiY = DEFAULT_DPI;
         int32_t mActiveConfig = DEFAULT_ACTIVE_CONFIG;
         const std::unordered_set<HWC2::Capability>* mCapabilities = nullptr;
         Hwc2::PowerAdvisor* mPowerAdvisor = nullptr;
     };

     class FakeDisplayDeviceInjector {
     public:
         FakeDisplayDeviceInjector(TestableSurfaceFlinger& flinger, DisplayDevice::DisplayType type,
                                   int32_t displayId)
               : mFlinger(flinger), mType(type), mDisplayId(displayId) {}

         sp<IBinder> token() const { return mDisplayToken; }

         DisplayDeviceState& mutableDrawingDisplayState() {
             return mFlinger.mutableDrawingState().displays.editValueFor(mDisplayToken);
         }

         DisplayDeviceState& mutableCurrentDisplayState() {
             return mFlinger.mutableCurrentState().displays.editValueFor(mDisplayToken);
         }

         const auto& getDrawingDisplayState() {
             return mFlinger.mutableDrawingState().displays.valueFor(mDisplayToken);
         }

         const auto& getCurrentDisplayState() {
             return mFlinger.mutableCurrentState().displays.valueFor(mDisplayToken);
         }

         auto& mutableDisplayDevice() { return mFlinger.mutableDisplays()[mDisplayToken]; }

         auto& setNativeWindow(const sp<ANativeWindow>& nativeWindow) {
             mNativeWindow = nativeWindow;
             return *this;
         }

         auto& setDisplaySurface(const sp<DisplaySurface>& displaySurface) {
             mDisplaySurface = displaySurface;
             return *this;
         }

         auto& setRenderSurface(std::unique_ptr<RE::Surface> renderSurface) {
             mRenderSurface = std::move(renderSurface);
             return *this;
         }

         auto& setSecure(bool secure) {
             mSecure = secure;
             return *this;
         }

         sp<DisplayDevice> inject() {
             std::unordered_map<ui::ColorMode, std::vector<ui::RenderIntent>> hdrAndRenderIntents;
             sp<DisplayDevice> device =
                     new DisplayDevice(mFlinger.mFlinger.get(), mType, mDisplayId, mSecure,
                                       mDisplayToken, mNativeWindow, mDisplaySurface,
                                       std::move(mRenderSurface), 0, 0, false, HdrCapabilities(), 0,
                                       hdrAndRenderIntents, HWC_POWER_MODE_NORMAL);
             mFlinger.mutableDisplays().emplace(mDisplayToken, device);

             DisplayDeviceState state;
             state.type = mType;
             state.isSecure = mSecure;
             mFlinger.mutableCurrentState().displays.add(mDisplayToken, state);
             mFlinger.mutableDrawingState().displays.add(mDisplayToken, state);

             if (mType >= DisplayDevice::DISPLAY_PRIMARY && mType < DisplayDevice::DISPLAY_VIRTUAL) {
                 mFlinger.mutableDisplayTokens()[mType] = mDisplayToken;
             }

             return device;
         }

     private:
         TestableSurfaceFlinger& mFlinger;
         sp<BBinder> mDisplayToken = new BBinder();
         DisplayDevice::DisplayType mType;
         const int32_t mDisplayId;
         sp<ANativeWindow> mNativeWindow;
         sp<DisplaySurface> mDisplaySurface;
         std::unique_ptr<RE::Surface> mRenderSurface;
         bool mSecure = false;
     };

     sp<SurfaceFlinger> mFlinger = new SurfaceFlinger(SurfaceFlinger::SkipInitialization);

     // We need to keep a reference to these so they are properly destroyed.
     std::vector<std::unique_ptr<HWC2Display>> mFakeHwcDisplays;
 };

 } // namespace android
	/*
	* Copyright (C) 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.
	*/

	#pragma once

	#include "DisplayDevice.h"
	#include "SurfaceFlinger.h"

	namespace android {

	class EventThread;

	namespace RE {
	class RenderEngine;
	}

	namespace Hwc2 {
	class Composer;
	}

	class TestableSurfaceFlinger {
	public:
	// Extend this as needed for accessing SurfaceFlinger private (and public)
	// functions.

	void setupRenderEngine(std::unique_ptr<RE::RenderEngine> renderEngine) {
	mFlinger->getBE().mRenderEngine = std::move(renderEngine);
	}

	void setupComposer(std::unique_ptr<Hwc2::Composer> composer) {
	mFlinger->getBE().mHwc.reset(new HWComposer(std::move(composer)));
	}

	using CreateBufferQueueFunction = SurfaceFlinger::CreateBufferQueueFunction;
	void setCreateBufferQueueFunction(CreateBufferQueueFunction f) {
	mFlinger->mCreateBufferQueue = f;
	}

	using CreateNativeWindowSurfaceFunction = SurfaceFlinger::CreateNativeWindowSurfaceFunction;
	void setCreateNativeWindowSurface(CreateNativeWindowSurfaceFunction f) {
	mFlinger->mCreateNativeWindowSurface = f;
	}

	using HotplugEvent = SurfaceFlinger::HotplugEvent;

	/* ------------------------------------------------------------------------
	* Forwarding for functions being tested
	*/

	auto createDisplay(const String8& displayName, bool secure) {
	return mFlinger->createDisplay(displayName, secure);
	}

	auto destroyDisplay(const sp<IBinder>& displayToken) {
	return mFlinger->destroyDisplay(displayToken);
	}

	auto resetDisplayState() { return mFlinger->resetDisplayState(); }

	auto setupNewDisplayDeviceInternal(const wp<IBinder>& displayToken, int32_t displayId,
	const DisplayDeviceState& state,
	const sp<DisplaySurface>& dispSurface,
	const sp<IGraphicBufferProducer>& producer) {
	return mFlinger->setupNewDisplayDeviceInternal(displayToken, displayId, state, dispSurface,
	producer);
	}

	auto handleTransactionLocked(uint32_t transactionFlags) {
	return mFlinger->handleTransactionLocked(transactionFlags);
	}

	auto onHotplugReceived(int32_t sequenceId, hwc2_display_t display,
	HWC2::Connection connection) {
	return mFlinger->onHotplugReceived(sequenceId, display, connection);
	}

	auto setDisplayStateLocked(const DisplayState& s) { return mFlinger->setDisplayStateLocked(s); }

	auto onInitializeDisplays() { return mFlinger->onInitializeDisplays(); }

	auto setPowerModeInternal(const sp<DisplayDevice>& display, int mode,
	bool stateLockHeld = false) {
	return mFlinger->setPowerModeInternal(display, mode, stateLockHeld);
	}

	/* ------------------------------------------------------------------------
	* Read-only access to private data to assert post-conditions.
	*/

	const auto& getAnimFrameTracker() const { return mFlinger->mAnimFrameTracker; }
	const auto& getHasPoweredOff() const { return mFlinger->mHasPoweredOff; }
	const auto& getHWVsyncAvailable() const { return mFlinger->mHWVsyncAvailable; }
	const auto& getVisibleRegionsDirty() const { return mFlinger->mVisibleRegionsDirty; }

	const auto& getCompositorTiming() const { return mFlinger->getBE().mCompositorTiming; }

	/* ------------------------------------------------------------------------
	* Read-write access to private data to set up preconditions and assert
	* post-conditions.
	*/

	auto& mutableHasWideColorDisplay() { return SurfaceFlinger::hasWideColorDisplay; }
	auto& mutableUseColorManagement() { return SurfaceFlinger::useColorManagement; }

	auto& mutableDisplayTokens() { return mFlinger->mDisplayTokens; }
	auto& mutableCurrentState() { return mFlinger->mCurrentState; }
	auto& mutableDisplays() { return mFlinger->mDisplays; }
	auto& mutableDisplayColorSetting() { return mFlinger->mDisplayColorSetting; }
	auto& mutableDrawingState() { return mFlinger->mDrawingState; }
	auto& mutableEventControlThread() { return mFlinger->mEventControlThread; }
	auto& mutableEventQueue() { return mFlinger->mEventQueue; }
	auto& mutableEventThread() { return mFlinger->mEventThread; }
	auto& mutableHWVsyncAvailable() { return mFlinger->mHWVsyncAvailable; }
	auto& mutableInterceptor() { return mFlinger->mInterceptor; }
	auto& mutableMainThreadId() { return mFlinger->mMainThreadId; }
	auto& mutablePendingHotplugEvents() { return mFlinger->mPendingHotplugEvents; }
	auto& mutablePrimaryDispSync() { return mFlinger->mPrimaryDispSync; }
	auto& mutablePrimaryHWVsyncEnabled() { return mFlinger->mPrimaryHWVsyncEnabled; }
	auto& mutableTransactionFlags() { return mFlinger->mTransactionFlags; }
	auto& mutableUseHwcVirtualDisplays() { return mFlinger->mUseHwcVirtualDisplays; }

	auto& mutableComposerSequenceId() { return mFlinger->getBE().mComposerSequenceId; }
	auto& mutableHwcDisplayData() { return mFlinger->getBE().mHwc->mDisplayData; }
	auto& mutableHwcDisplaySlots() { return mFlinger->getBE().mHwc->mHwcDisplaySlots; }

	~TestableSurfaceFlinger() {
	// All these pointer and container clears help ensure that GMock does
	// not report a leaked object, since the SurfaceFlinger instance may
	// still be referenced by something despite our best efforts to destroy
	// it after each test is done.
	mutableDisplays().clear();
	mutableEventControlThread().reset();
	mutableEventQueue().reset();
	mutableEventThread().reset();
	mutableInterceptor().reset();
	mutablePrimaryDispSync().reset();
	mFlinger->getBE().mHwc.reset();
	mFlinger->getBE().mRenderEngine.reset();
	}

	/* ------------------------------------------------------------------------
	* Wrapper classes for Read-write access to private data to set up
	* preconditions and assert post-conditions.
	*/
	class FakePowerAdvisor : public Hwc2::PowerAdvisor {
	public:
	FakePowerAdvisor() = default;
	~FakePowerAdvisor() override = default;
	void setExpensiveRenderingExpected(hwc2_display_t, bool) override { }
	};

	struct HWC2Display : public HWC2::Display {
	HWC2Display(Hwc2::Composer& composer, Hwc2::PowerAdvisor& advisor,
	const std::unordered_set<HWC2::Capability>& capabilities, hwc2_display_t id,
	HWC2::DisplayType type)
	: HWC2::Display(composer, advisor, capabilities, id, type) {}
	~HWC2Display() {
	// Prevents a call to disable vsyncs.
	mType = HWC2::DisplayType::Invalid;
	}

	auto& mutableIsConnected() { return this->mIsConnected; }
	auto& mutableConfigs() { return this->mConfigs; }
	};

	class FakeHwcDisplayInjector {
	public:
	static constexpr hwc2_display_t DEFAULT_HWC_DISPLAY_ID = 1000;
	static constexpr int32_t DEFAULT_WIDTH = 1920;
	static constexpr int32_t DEFAULT_HEIGHT = 1280;
	static constexpr int32_t DEFAULT_REFRESH_RATE = 16'666'666;
	static constexpr int32_t DEFAULT_DPI = 320;
	static constexpr int32_t DEFAULT_ACTIVE_CONFIG = 0;

	FakeHwcDisplayInjector(DisplayDevice::DisplayType type, HWC2::DisplayType hwcDisplayType)
	: mType(type), mHwcDisplayType(hwcDisplayType) {}

	auto& setHwcDisplayId(hwc2_display_t displayId) {
	mHwcDisplayId = displayId;
	return *this;
	}

	auto& setWidth(int32_t width) {
	mWidth = width;
	return *this;
	}

	auto& setHeight(int32_t height) {
	mHeight = height;
	return *this;
	}

	auto& setRefreshRate(int32_t refreshRate) {
	mRefreshRate = refreshRate;
	return *this;
	}

	auto& setDpiX(int32_t dpi) {
	mDpiX = dpi;
	return *this;
	}

	auto& setDpiY(int32_t dpi) {
	mDpiY = dpi;
	return *this;
	}

	auto& setActiveConfig(int32_t config) {
	mActiveConfig = config;
	return *this;
	}

	auto& setCapabilities(const std::unordered_set<HWC2::Capability>* capabilities) {
	mCapabilities = capabilities;
	return *this;
	}

	auto& setPowerAdvisor(Hwc2::PowerAdvisor* powerAdvisor) {
	mPowerAdvisor = powerAdvisor;
	return *this;
	}

	void inject(TestableSurfaceFlinger* flinger, Hwc2::Composer* composer) {
	static FakePowerAdvisor defaultPowerAdvisor;
	if (mPowerAdvisor == nullptr) mPowerAdvisor = &defaultPowerAdvisor;
	static const std::unordered_set<HWC2::Capability> defaultCapabilities;
	if (mCapabilities == nullptr) mCapabilities = &defaultCapabilities;

	// Caution - Make sure that any values passed by reference here do
	// not refer to an instance owned by FakeHwcDisplayInjector. This
	// class has temporary lifetime, while the constructed HWC2::Display
	// is much longer lived.
	auto display = std::make_unique<HWC2Display>(composer, mPowerAdvisor, *mCapabilities,
	mHwcDisplayId, mHwcDisplayType);

	auto config = HWC2::Display::Config::Builder(*display, mActiveConfig);
	config.setWidth(mWidth);
	config.setHeight(mHeight);
	config.setVsyncPeriod(mRefreshRate);
	config.setDpiX(mDpiX);
	config.setDpiY(mDpiY);
	display->mutableConfigs().emplace(mActiveConfig, config.build());
	display->mutableIsConnected() = true;

	ASSERT_TRUE(flinger->mutableHwcDisplayData().size() > static_cast<size_t>(mType));
	flinger->mutableHwcDisplayData()[mType] = HWComposer::DisplayData();
	flinger->mutableHwcDisplayData()[mType].hwcDisplay = display.get();
	flinger->mutableHwcDisplaySlots().emplace(mHwcDisplayId, mType);

	flinger->mFakeHwcDisplays.push_back(std::move(display));
	}

	private:
	DisplayDevice::DisplayType mType;
	HWC2::DisplayType mHwcDisplayType;
	hwc2_display_t mHwcDisplayId = DEFAULT_HWC_DISPLAY_ID;
	int32_t mWidth = DEFAULT_WIDTH;
	int32_t mHeight = DEFAULT_HEIGHT;
	int32_t mRefreshRate = DEFAULT_REFRESH_RATE;
	int32_t mDpiX = DEFAULT_DPI;
	int32_t mDpiY = DEFAULT_DPI;
	int32_t mActiveConfig = DEFAULT_ACTIVE_CONFIG;
	const std::unordered_set<HWC2::Capability>* mCapabilities = nullptr;
	Hwc2::PowerAdvisor* mPowerAdvisor = nullptr;
	};

	class FakeDisplayDeviceInjector {
	public:
	FakeDisplayDeviceInjector(TestableSurfaceFlinger& flinger, DisplayDevice::DisplayType type,
	int32_t displayId)
	: mFlinger(flinger), mType(type), mDisplayId(displayId) {}

	sp<IBinder> token() const { return mDisplayToken; }

	DisplayDeviceState& mutableDrawingDisplayState() {
	return mFlinger.mutableDrawingState().displays.editValueFor(mDisplayToken);
	}

	DisplayDeviceState& mutableCurrentDisplayState() {
	return mFlinger.mutableCurrentState().displays.editValueFor(mDisplayToken);
	}

	const auto& getDrawingDisplayState() {
	return mFlinger.mutableDrawingState().displays.valueFor(mDisplayToken);
	}

	const auto& getCurrentDisplayState() {
	return mFlinger.mutableCurrentState().displays.valueFor(mDisplayToken);
	}

	auto& mutableDisplayDevice() { return mFlinger.mutableDisplays()[mDisplayToken]; }

	auto& setNativeWindow(const sp<ANativeWindow>& nativeWindow) {
	mNativeWindow = nativeWindow;
	return *this;
	}

	auto& setDisplaySurface(const sp<DisplaySurface>& displaySurface) {
	mDisplaySurface = displaySurface;
	return *this;
	}

	auto& setRenderSurface(std::unique_ptr<RE::Surface> renderSurface) {
	mRenderSurface = std::move(renderSurface);
	return *this;
	}

	auto& setSecure(bool secure) {
	mSecure = secure;
	return *this;
	}

	sp<DisplayDevice> inject() {
	std::unordered_map<ui::ColorMode, std::vector<ui::RenderIntent>> hdrAndRenderIntents;
	sp<DisplayDevice> device =
	new DisplayDevice(mFlinger.mFlinger.get(), mType, mDisplayId, mSecure,
	mDisplayToken, mNativeWindow, mDisplaySurface,
	std::move(mRenderSurface), 0, 0, false, HdrCapabilities(), 0,
	hdrAndRenderIntents, HWC_POWER_MODE_NORMAL);
	mFlinger.mutableDisplays().emplace(mDisplayToken, device);

	DisplayDeviceState state;
	state.type = mType;
	state.isSecure = mSecure;
	mFlinger.mutableCurrentState().displays.add(mDisplayToken, state);
	mFlinger.mutableDrawingState().displays.add(mDisplayToken, state);

	if (mType >= DisplayDevice::DISPLAY_PRIMARY && mType < DisplayDevice::DISPLAY_VIRTUAL) {
	mFlinger.mutableDisplayTokens()[mType] = mDisplayToken;
	}

	return device;
	}

	private:
	TestableSurfaceFlinger& mFlinger;
	sp<BBinder> mDisplayToken = new BBinder();
	DisplayDevice::DisplayType mType;
	const int32_t mDisplayId;
	sp<ANativeWindow> mNativeWindow;
	sp<DisplaySurface> mDisplaySurface;
	std::unique_ptr<RE::Surface> mRenderSurface;
	bool mSecure = false;
	};

	sp<SurfaceFlinger> mFlinger = new SurfaceFlinger(SurfaceFlinger::SkipInitialization);

	// We need to keep a reference to these so they are properly destroyed.
	std::vector<std::unique_ptr<HWC2Display>> mFakeHwcDisplays;
	};

	} // namespace android