libs/hwui/renderthread/RenderThread.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2013 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 "RenderThread.h"

 #include "../HardwareBitmapUploader.h"
 #include "CanvasContext.h"
 #include "DeviceInfo.h"
 #include "EglManager.h"
 #include "Readback.h"
 #include "RenderProxy.h"
 #include "VulkanManager.h"
 #include "hwui/Bitmap.h"
 #include "pipeline/skia/SkiaOpenGLPipeline.h"
 #include "pipeline/skia/SkiaVulkanPipeline.h"
 #include "renderstate/RenderState.h"
 #include "utils/TimeUtils.h"
 #include "utils/TraceUtils.h"

 #include <GrContextOptions.h>
 #include <gl/GrGLInterface.h>

 #include <sys/resource.h>
 #include <utils/Condition.h>
 #include <utils/Log.h>
 #include <utils/Mutex.h>
 #include <thread>

 #include <ui/FatVector.h>

 namespace android {
 namespace uirenderer {
 namespace renderthread {

 static bool gHasRenderThreadInstance = false;

 static JVMAttachHook gOnStartHook = nullptr;

 void RenderThread::frameCallback(int64_t frameTimeNanos, void* data) {
     RenderThread* rt = reinterpret_cast<RenderThread*>(data);
     rt->mVsyncRequested = false;
     if (rt->timeLord().vsyncReceived(frameTimeNanos) && !rt->mFrameCallbackTaskPending) {
         ATRACE_NAME("queue mFrameCallbackTask");
         rt->mFrameCallbackTaskPending = true;
         nsecs_t runAt = (frameTimeNanos + rt->mDispatchFrameDelay);
         rt->queue().postAt(runAt, [=]() { rt->dispatchFrameCallbacks(); });
     }
 }

 void RenderThread::refreshRateCallback(int64_t vsyncPeriod, void* data) {
     ATRACE_NAME("refreshRateCallback");
     RenderThread* rt = reinterpret_cast<RenderThread*>(data);
     DeviceInfo::get()->onRefreshRateChanged(vsyncPeriod);
     rt->setupFrameInterval();
 }

 class ChoreographerSource : public VsyncSource {
 public:
     ChoreographerSource(RenderThread* renderThread) : mRenderThread(renderThread) {}

     virtual void requestNextVsync() override {
         AChoreographer_postFrameCallback64(mRenderThread->mChoreographer,
                                            RenderThread::frameCallback, mRenderThread);
     }

     virtual void drainPendingEvents() override {
         AChoreographer_handlePendingEvents(mRenderThread->mChoreographer, mRenderThread);
     }

 private:
     RenderThread* mRenderThread;
 };

 class DummyVsyncSource : public VsyncSource {
 public:
     DummyVsyncSource(RenderThread* renderThread) : mRenderThread(renderThread) {}

     virtual void requestNextVsync() override {
         mRenderThread->queue().postDelayed(16_ms, [this]() {
             RenderThread::frameCallback(systemTime(SYSTEM_TIME_MONOTONIC), mRenderThread);
         });
     }

     virtual void drainPendingEvents() override {
         RenderThread::frameCallback(systemTime(SYSTEM_TIME_MONOTONIC), mRenderThread);
     }

 private:
     RenderThread* mRenderThread;
 };

 bool RenderThread::hasInstance() {
     return gHasRenderThreadInstance;
 }

 void RenderThread::setOnStartHook(JVMAttachHook onStartHook) {
     LOG_ALWAYS_FATAL_IF(hasInstance(), "can't set an onStartHook after we've started...");
     gOnStartHook = onStartHook;
 }

 JVMAttachHook RenderThread::getOnStartHook() {
     return gOnStartHook;
 }

 RenderThread& RenderThread::getInstance() {
     // This is a pointer because otherwise __cxa_finalize
     // will try to delete it like a Good Citizen but that causes us to crash
     // because we don't want to delete the RenderThread normally.
     static RenderThread* sInstance = new RenderThread();
     gHasRenderThreadInstance = true;
     return *sInstance;
 }

 RenderThread::RenderThread()
         : ThreadBase()
         , mVsyncSource(nullptr)
         , mVsyncRequested(false)
         , mFrameCallbackTaskPending(false)
         , mRenderState(nullptr)
         , mEglManager(nullptr)
         , mFunctorManager(WebViewFunctorManager::instance())
         , mVkManager(nullptr) {
     Properties::load();
     start("RenderThread");
 }

 RenderThread::~RenderThread() {
     // Note that if this fatal assertion is removed then member variables must
     // be properly destroyed.
     LOG_ALWAYS_FATAL("Can't destroy the render thread");
 }

 void RenderThread::initializeChoreographer() {
     LOG_ALWAYS_FATAL_IF(mVsyncSource, "Initializing a second Choreographer?");

     if (!Properties::isolatedProcess) {
         mChoreographer = AChoreographer_create();
         LOG_ALWAYS_FATAL_IF(mChoreographer == nullptr, "Initialization of Choreographer failed");
         AChoreographer_registerRefreshRateCallback(mChoreographer,
                                                    RenderThread::refreshRateCallback, this);

         // Register the FD
         mLooper->addFd(AChoreographer_getFd(mChoreographer), 0, Looper::EVENT_INPUT,
                        RenderThread::choreographerCallback, this);
         mVsyncSource = new ChoreographerSource(this);
     } else {
         mVsyncSource = new DummyVsyncSource(this);
     }
 }

 void RenderThread::initThreadLocals() {
     setupFrameInterval();
     initializeChoreographer();
     mEglManager = new EglManager();
     mRenderState = new RenderState(*this);
     mVkManager = new VulkanManager();
     mCacheManager = new CacheManager();
 }

 void RenderThread::setupFrameInterval() {
     nsecs_t frameIntervalNanos = DeviceInfo::getVsyncPeriod();
     mTimeLord.setFrameInterval(frameIntervalNanos);
     mDispatchFrameDelay = static_cast<nsecs_t>(frameIntervalNanos * .25f);
 }

 void RenderThread::requireGlContext() {
     if (mEglManager->hasEglContext()) {
         return;
     }
     mEglManager->initialize();

     sk_sp<const GrGLInterface> glInterface(GrGLCreateNativeInterface());
     LOG_ALWAYS_FATAL_IF(!glInterface.get());

     GrContextOptions options;
     initGrContextOptions(options);
     auto glesVersion = reinterpret_cast<const char*>(glGetString(GL_VERSION));
     auto size = glesVersion ? strlen(glesVersion) : -1;
     cacheManager().configureContext(&options, glesVersion, size);
     sk_sp<GrContext> grContext(GrContext::MakeGL(std::move(glInterface), options));
     LOG_ALWAYS_FATAL_IF(!grContext.get());
     setGrContext(grContext);
 }

 void RenderThread::requireVkContext() {
     if (mVkManager->hasVkContext()) {
         return;
     }
     mVkManager->initialize();
     GrContextOptions options;
     initGrContextOptions(options);
     auto vkDriverVersion = mVkManager->getDriverVersion();
     cacheManager().configureContext(&options, &vkDriverVersion, sizeof(vkDriverVersion));
     sk_sp<GrContext> grContext = mVkManager->createContext(options);
     LOG_ALWAYS_FATAL_IF(!grContext.get());
     setGrContext(grContext);
 }

 void RenderThread::initGrContextOptions(GrContextOptions& options) {
     options.fPreferExternalImagesOverES3 = true;
     options.fDisableDistanceFieldPaths = true;
 }

 void RenderThread::destroyRenderingContext() {
     mFunctorManager.onContextDestroyed();
     if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaGL) {
         if (mEglManager->hasEglContext()) {
             setGrContext(nullptr);
             mEglManager->destroy();
         }
     } else {
         if (vulkanManager().hasVkContext()) {
             setGrContext(nullptr);
             vulkanManager().destroy();
         }
     }
 }

 void RenderThread::dumpGraphicsMemory(int fd) {
     globalProfileData()->dump(fd);

     String8 cachesOutput;
     String8 pipeline;
     auto renderType = Properties::getRenderPipelineType();
     switch (renderType) {
         case RenderPipelineType::SkiaGL: {
             mCacheManager->dumpMemoryUsage(cachesOutput, mRenderState);
             pipeline.appendFormat("Skia (OpenGL)");
             break;
         }
         case RenderPipelineType::SkiaVulkan: {
             mCacheManager->dumpMemoryUsage(cachesOutput, mRenderState);
             pipeline.appendFormat("Skia (Vulkan)");
             break;
         }
         default:
             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t)renderType);
             break;
     }

     dprintf(fd, "\n%s\n", cachesOutput.string());
     dprintf(fd, "\nPipeline=%s\n", pipeline.string());
 }

 Readback& RenderThread::readback() {
     if (!mReadback) {
         mReadback = new Readback(*this);
     }

     return *mReadback;
 }

 void RenderThread::setGrContext(sk_sp<GrContext> context) {
     mCacheManager->reset(context);
     if (mGrContext) {
         mRenderState->onContextDestroyed();
         mGrContext->releaseResourcesAndAbandonContext();
     }
     mGrContext = std::move(context);
     if (mGrContext) {
         DeviceInfo::setMaxTextureSize(mGrContext->maxRenderTargetSize());
     }
 }

 int RenderThread::choreographerCallback(int fd, int events, void* data) {
     if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
         ALOGE("Display event receiver pipe was closed or an error occurred.  "
               "events=0x%x",
               events);
         return 0;  // remove the callback
     }

     if (!(events & Looper::EVENT_INPUT)) {
         ALOGW("Received spurious callback for unhandled poll event.  "
               "events=0x%x",
               events);
         return 1;  // keep the callback
     }
     RenderThread* rt = reinterpret_cast<RenderThread*>(data);
     AChoreographer_handlePendingEvents(rt->mChoreographer, data);

     return 1;
 }

 void RenderThread::dispatchFrameCallbacks() {
     ATRACE_CALL();
     mFrameCallbackTaskPending = false;

     std::set<IFrameCallback*> callbacks;
     mFrameCallbacks.swap(callbacks);

     if (callbacks.size()) {
         // Assume one of them will probably animate again so preemptively
         // request the next vsync in case it occurs mid-frame
         requestVsync();
         for (std::set<IFrameCallback*>::iterator it = callbacks.begin(); it != callbacks.end();
              it++) {
             (*it)->doFrame();
         }
     }
 }

 void RenderThread::requestVsync() {
     if (!mVsyncRequested) {
         mVsyncRequested = true;
         mVsyncSource->requestNextVsync();
     }
 }

 bool RenderThread::threadLoop() {
     setpriority(PRIO_PROCESS, 0, PRIORITY_DISPLAY);
     Looper::setForThread(mLooper);
     if (gOnStartHook) {
         gOnStartHook("RenderThread");
     }
     initThreadLocals();

     while (true) {
         waitForWork();
         processQueue();

         if (mPendingRegistrationFrameCallbacks.size() && !mFrameCallbackTaskPending) {
             mVsyncSource->drainPendingEvents();
             mFrameCallbacks.insert(mPendingRegistrationFrameCallbacks.begin(),
                                    mPendingRegistrationFrameCallbacks.end());
             mPendingRegistrationFrameCallbacks.clear();
             requestVsync();
         }

         if (!mFrameCallbackTaskPending && !mVsyncRequested && mFrameCallbacks.size()) {
             // TODO: Clean this up. This is working around an issue where a combination
             // of bad timing and slow drawing can result in dropping a stale vsync
             // on the floor (correct!) but fails to schedule to listen for the
             // next vsync (oops), so none of the callbacks are run.
             requestVsync();
         }
     }

     return false;
 }

 void RenderThread::postFrameCallback(IFrameCallback* callback) {
     mPendingRegistrationFrameCallbacks.insert(callback);
 }

 bool RenderThread::removeFrameCallback(IFrameCallback* callback) {
     size_t erased;
     erased = mFrameCallbacks.erase(callback);
     erased |= mPendingRegistrationFrameCallbacks.erase(callback);
     return erased;
 }

 void RenderThread::pushBackFrameCallback(IFrameCallback* callback) {
     if (mFrameCallbacks.erase(callback)) {
         mPendingRegistrationFrameCallbacks.insert(callback);
     }
 }

 sk_sp<Bitmap> RenderThread::allocateHardwareBitmap(SkBitmap& skBitmap) {
     auto renderType = Properties::getRenderPipelineType();
     switch (renderType) {
         case RenderPipelineType::SkiaVulkan:
             return skiapipeline::SkiaVulkanPipeline::allocateHardwareBitmap(*this, skBitmap);
         default:
             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t)renderType);
             break;
     }
     return nullptr;
 }

 bool RenderThread::isCurrent() {
     return gettid() == getInstance().getTid();
 }

 void RenderThread::preload() {
     // EGL driver is always preloaded only if HWUI renders with GL.
     if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaGL) {
         std::thread eglInitThread([]() { eglGetDisplay(EGL_DEFAULT_DISPLAY); });
         eglInitThread.detach();
     } else {
         requireVkContext();
     }
     HardwareBitmapUploader::initialize();
 }

 } /* namespace renderthread */
 } /* namespace uirenderer */
 } /* namespace android */
	/*
	* Copyright (C) 2013 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 "RenderThread.h"

	#include "../HardwareBitmapUploader.h"
	#include "CanvasContext.h"
	#include "DeviceInfo.h"
	#include "EglManager.h"
	#include "Readback.h"
	#include "RenderProxy.h"
	#include "VulkanManager.h"
	#include "hwui/Bitmap.h"
	#include "pipeline/skia/SkiaOpenGLPipeline.h"
	#include "pipeline/skia/SkiaVulkanPipeline.h"
	#include "renderstate/RenderState.h"
	#include "utils/TimeUtils.h"
	#include "utils/TraceUtils.h"

	#include <GrContextOptions.h>
	#include <gl/GrGLInterface.h>

	#include <sys/resource.h>
	#include <utils/Condition.h>
	#include <utils/Log.h>
	#include <utils/Mutex.h>
	#include <thread>

	#include <ui/FatVector.h>

	namespace android {
	namespace uirenderer {
	namespace renderthread {

	static bool gHasRenderThreadInstance = false;

	static JVMAttachHook gOnStartHook = nullptr;

	void RenderThread::frameCallback(int64_t frameTimeNanos, void* data) {
	RenderThread* rt = reinterpret_cast<RenderThread*>(data);
	rt->mVsyncRequested = false;
	if (rt->timeLord().vsyncReceived(frameTimeNanos) && !rt->mFrameCallbackTaskPending) {
	ATRACE_NAME("queue mFrameCallbackTask");
	rt->mFrameCallbackTaskPending = true;
	nsecs_t runAt = (frameTimeNanos + rt->mDispatchFrameDelay);
	rt->queue().postAt(runAt, [=]() { rt->dispatchFrameCallbacks(); });
	}
	}

	void RenderThread::refreshRateCallback(int64_t vsyncPeriod, void* data) {
	ATRACE_NAME("refreshRateCallback");
	RenderThread* rt = reinterpret_cast<RenderThread*>(data);
	DeviceInfo::get()->onRefreshRateChanged(vsyncPeriod);
	rt->setupFrameInterval();
	}

	class ChoreographerSource : public VsyncSource {
	public:
	ChoreographerSource(RenderThread* renderThread) : mRenderThread(renderThread) {}

	virtual void requestNextVsync() override {
	AChoreographer_postFrameCallback64(mRenderThread->mChoreographer,
	RenderThread::frameCallback, mRenderThread);
	}

	virtual void drainPendingEvents() override {
	AChoreographer_handlePendingEvents(mRenderThread->mChoreographer, mRenderThread);
	}

	private:
	RenderThread* mRenderThread;
	};

	class DummyVsyncSource : public VsyncSource {
	public:
	DummyVsyncSource(RenderThread* renderThread) : mRenderThread(renderThread) {}

	virtual void requestNextVsync() override {
	mRenderThread->queue().postDelayed(16_ms, [this]() {
	RenderThread::frameCallback(systemTime(SYSTEM_TIME_MONOTONIC), mRenderThread);
	});
	}

	virtual void drainPendingEvents() override {
	RenderThread::frameCallback(systemTime(SYSTEM_TIME_MONOTONIC), mRenderThread);
	}

	private:
	RenderThread* mRenderThread;
	};

	bool RenderThread::hasInstance() {
	return gHasRenderThreadInstance;
	}

	void RenderThread::setOnStartHook(JVMAttachHook onStartHook) {
	LOG_ALWAYS_FATAL_IF(hasInstance(), "can't set an onStartHook after we've started...");
	gOnStartHook = onStartHook;
	}

	JVMAttachHook RenderThread::getOnStartHook() {
	return gOnStartHook;
	}

	RenderThread& RenderThread::getInstance() {
	// This is a pointer because otherwise __cxa_finalize
	// will try to delete it like a Good Citizen but that causes us to crash
	// because we don't want to delete the RenderThread normally.
	static RenderThread* sInstance = new RenderThread();
	gHasRenderThreadInstance = true;
	return *sInstance;
	}

	RenderThread::RenderThread()
	: ThreadBase()
	, mVsyncSource(nullptr)
	, mVsyncRequested(false)
	, mFrameCallbackTaskPending(false)
	, mRenderState(nullptr)
	, mEglManager(nullptr)
	, mFunctorManager(WebViewFunctorManager::instance())
	, mVkManager(nullptr) {
	Properties::load();
	start("RenderThread");
	}

	RenderThread::~RenderThread() {
	// Note that if this fatal assertion is removed then member variables must
	// be properly destroyed.
	LOG_ALWAYS_FATAL("Can't destroy the render thread");
	}

	void RenderThread::initializeChoreographer() {
	LOG_ALWAYS_FATAL_IF(mVsyncSource, "Initializing a second Choreographer?");

	if (!Properties::isolatedProcess) {
	mChoreographer = AChoreographer_create();
	LOG_ALWAYS_FATAL_IF(mChoreographer == nullptr, "Initialization of Choreographer failed");
	AChoreographer_registerRefreshRateCallback(mChoreographer,
	RenderThread::refreshRateCallback, this);

	// Register the FD
	mLooper->addFd(AChoreographer_getFd(mChoreographer), 0, Looper::EVENT_INPUT,
	RenderThread::choreographerCallback, this);
	mVsyncSource = new ChoreographerSource(this);
	} else {
	mVsyncSource = new DummyVsyncSource(this);
	}
	}

	void RenderThread::initThreadLocals() {
	setupFrameInterval();
	initializeChoreographer();
	mEglManager = new EglManager();
	mRenderState = new RenderState(*this);
	mVkManager = new VulkanManager();
	mCacheManager = new CacheManager();
	}

	void RenderThread::setupFrameInterval() {
	nsecs_t frameIntervalNanos = DeviceInfo::getVsyncPeriod();
	mTimeLord.setFrameInterval(frameIntervalNanos);
	mDispatchFrameDelay = static_cast<nsecs_t>(frameIntervalNanos * .25f);
	}

	void RenderThread::requireGlContext() {
	if (mEglManager->hasEglContext()) {
	return;
	}
	mEglManager->initialize();

	sk_sp<const GrGLInterface> glInterface(GrGLCreateNativeInterface());
	LOG_ALWAYS_FATAL_IF(!glInterface.get());

	GrContextOptions options;
	initGrContextOptions(options);
	auto glesVersion = reinterpret_cast<const char*>(glGetString(GL_VERSION));
	auto size = glesVersion ? strlen(glesVersion) : -1;
	cacheManager().configureContext(&options, glesVersion, size);
	sk_sp<GrContext> grContext(GrContext::MakeGL(std::move(glInterface), options));
	LOG_ALWAYS_FATAL_IF(!grContext.get());
	setGrContext(grContext);
	}

	void RenderThread::requireVkContext() {
	if (mVkManager->hasVkContext()) {
	return;
	}
	mVkManager->initialize();
	GrContextOptions options;
	initGrContextOptions(options);
	auto vkDriverVersion = mVkManager->getDriverVersion();
	cacheManager().configureContext(&options, &vkDriverVersion, sizeof(vkDriverVersion));
	sk_sp<GrContext> grContext = mVkManager->createContext(options);
	LOG_ALWAYS_FATAL_IF(!grContext.get());
	setGrContext(grContext);
	}

	void RenderThread::initGrContextOptions(GrContextOptions& options) {
	options.fPreferExternalImagesOverES3 = true;
	options.fDisableDistanceFieldPaths = true;
	}

	void RenderThread::destroyRenderingContext() {
	mFunctorManager.onContextDestroyed();
	if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaGL) {
	if (mEglManager->hasEglContext()) {
	setGrContext(nullptr);
	mEglManager->destroy();
	}
	} else {
	if (vulkanManager().hasVkContext()) {
	setGrContext(nullptr);
	vulkanManager().destroy();
	}
	}
	}

	void RenderThread::dumpGraphicsMemory(int fd) {
	globalProfileData()->dump(fd);

	String8 cachesOutput;
	String8 pipeline;
	auto renderType = Properties::getRenderPipelineType();
	switch (renderType) {
	case RenderPipelineType::SkiaGL: {
	mCacheManager->dumpMemoryUsage(cachesOutput, mRenderState);
	pipeline.appendFormat("Skia (OpenGL)");
	break;
	}
	case RenderPipelineType::SkiaVulkan: {
	mCacheManager->dumpMemoryUsage(cachesOutput, mRenderState);
	pipeline.appendFormat("Skia (Vulkan)");
	break;
	}
	default:
	LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t)renderType);
	break;
	}

	dprintf(fd, "\n%s\n", cachesOutput.string());
	dprintf(fd, "\nPipeline=%s\n", pipeline.string());
	}

	Readback& RenderThread::readback() {
	if (!mReadback) {
	mReadback = new Readback(*this);
	}

	return *mReadback;
	}

	void RenderThread::setGrContext(sk_sp<GrContext> context) {
	mCacheManager->reset(context);
	if (mGrContext) {
	mRenderState->onContextDestroyed();
	mGrContext->releaseResourcesAndAbandonContext();
	}
	mGrContext = std::move(context);
	if (mGrContext) {
	DeviceInfo::setMaxTextureSize(mGrContext->maxRenderTargetSize());
	}
	}

	int RenderThread::choreographerCallback(int fd, int events, void* data) {
	if (events & (Looper::EVENT_ERROR \| Looper::EVENT_HANGUP)) {
	ALOGE("Display event receiver pipe was closed or an error occurred. "
	"events=0x%x",
	events);
	return 0; // remove the callback
	}

	if (!(events & Looper::EVENT_INPUT)) {
	ALOGW("Received spurious callback for unhandled poll event. "
	"events=0x%x",
	events);
	return 1; // keep the callback
	}
	RenderThread* rt = reinterpret_cast<RenderThread*>(data);
	AChoreographer_handlePendingEvents(rt->mChoreographer, data);

	return 1;
	}

	void RenderThread::dispatchFrameCallbacks() {
	ATRACE_CALL();
	mFrameCallbackTaskPending = false;

	std::set<IFrameCallback*> callbacks;
	mFrameCallbacks.swap(callbacks);

	if (callbacks.size()) {
	// Assume one of them will probably animate again so preemptively
	// request the next vsync in case it occurs mid-frame
	requestVsync();
	for (std::set<IFrameCallback*>::iterator it = callbacks.begin(); it != callbacks.end();
	it++) {
	(*it)->doFrame();
	}
	}
	}

	void RenderThread::requestVsync() {
	if (!mVsyncRequested) {
	mVsyncRequested = true;
	mVsyncSource->requestNextVsync();
	}
	}

	bool RenderThread::threadLoop() {
	setpriority(PRIO_PROCESS, 0, PRIORITY_DISPLAY);
	Looper::setForThread(mLooper);
	if (gOnStartHook) {
	gOnStartHook("RenderThread");
	}
	initThreadLocals();

	while (true) {
	waitForWork();
	processQueue();

	if (mPendingRegistrationFrameCallbacks.size() && !mFrameCallbackTaskPending) {
	mVsyncSource->drainPendingEvents();
	mFrameCallbacks.insert(mPendingRegistrationFrameCallbacks.begin(),
	mPendingRegistrationFrameCallbacks.end());
	mPendingRegistrationFrameCallbacks.clear();
	requestVsync();
	}

	if (!mFrameCallbackTaskPending && !mVsyncRequested && mFrameCallbacks.size()) {
	// TODO: Clean this up. This is working around an issue where a combination
	// of bad timing and slow drawing can result in dropping a stale vsync
	// on the floor (correct!) but fails to schedule to listen for the
	// next vsync (oops), so none of the callbacks are run.
	requestVsync();
	}
	}

	return false;
	}

	void RenderThread::postFrameCallback(IFrameCallback* callback) {
	mPendingRegistrationFrameCallbacks.insert(callback);
	}

	bool RenderThread::removeFrameCallback(IFrameCallback* callback) {
	size_t erased;
	erased = mFrameCallbacks.erase(callback);
	erased \|= mPendingRegistrationFrameCallbacks.erase(callback);
	return erased;
	}

	void RenderThread::pushBackFrameCallback(IFrameCallback* callback) {
	if (mFrameCallbacks.erase(callback)) {
	mPendingRegistrationFrameCallbacks.insert(callback);
	}
	}

	sk_sp<Bitmap> RenderThread::allocateHardwareBitmap(SkBitmap& skBitmap) {
	auto renderType = Properties::getRenderPipelineType();
	switch (renderType) {
	case RenderPipelineType::SkiaVulkan:
	return skiapipeline::SkiaVulkanPipeline::allocateHardwareBitmap(*this, skBitmap);
	default:
	LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t)renderType);
	break;
	}
	return nullptr;
	}

	bool RenderThread::isCurrent() {
	return gettid() == getInstance().getTid();
	}

	void RenderThread::preload() {
	// EGL driver is always preloaded only if HWUI renders with GL.
	if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaGL) {
	std::thread eglInitThread([]() { eglGetDisplay(EGL_DEFAULT_DISPLAY); });
	eglInitThread.detach();
	} else {
	requireVkContext();
	}
	HardwareBitmapUploader::initialize();
	}

	} /* namespace renderthread */
	} /* namespace uirenderer */
	} /* namespace android */