1 /* 2 * Copyright 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <android-base/thread_annotations.h> 20 #include <condition_variable> 21 #include <mutex> 22 #include <queue> 23 #include <thread> 24 25 #include "renderengine/RenderEngine.h" 26 27 namespace android { 28 namespace renderengine { 29 namespace threaded { 30 31 using CreateInstanceFactory = std::function<std::unique_ptr<renderengine::RenderEngine>()>; 32 33 /** 34 * This class extends a basic RenderEngine class. It contains a thread. Each time a function of 35 * this class is called, we create a lambda function that is put on a queue. The main thread then 36 * executes the functions in order. 37 */ 38 class RenderEngineThreaded : public RenderEngine { 39 public: 40 static std::unique_ptr<RenderEngineThreaded> create(CreateInstanceFactory factory, 41 RenderEngineType type); 42 43 RenderEngineThreaded(CreateInstanceFactory factory, RenderEngineType type); 44 ~RenderEngineThreaded() override; 45 std::future<void> primeCache() override; 46 47 void dump(std::string& result) override; 48 49 void genTextures(size_t count, uint32_t* names) override; 50 void deleteTextures(size_t count, uint32_t const* names) override; 51 size_t getMaxTextureSize() const override; 52 size_t getMaxViewportDims() const override; 53 54 bool isProtected() const override; 55 bool supportsProtectedContent() const override; 56 void useProtectedContext(bool useProtectedContext) override; 57 void cleanupPostRender() override; 58 59 status_t drawLayers(const DisplaySettings& display, 60 const std::vector<const LayerSettings*>& layers, 61 const std::shared_ptr<ExternalTexture>& buffer, 62 const bool useFramebufferCache, base::unique_fd&& bufferFence, 63 base::unique_fd* drawFence) override; 64 65 void cleanFramebufferCache() override; 66 int getContextPriority() override; 67 bool supportsBackgroundBlur() override; 68 void onPrimaryDisplaySizeChanged(ui::Size size) override; 69 70 protected: 71 void mapExternalTextureBuffer(const sp<GraphicBuffer>& buffer, bool isRenderable) override; 72 void unmapExternalTextureBuffer(const sp<GraphicBuffer>& buffer) override; 73 bool canSkipPostRenderCleanup() const override; 74 75 private: 76 void threadMain(CreateInstanceFactory factory); 77 void waitUntilInitialized() const; 78 static status_t setSchedFifo(bool enabled); 79 80 /* ------------------------------------------------------------------------ 81 * Threading 82 */ 83 const char* const mThreadName = "RenderEngine"; 84 // Protects the creation and destruction of mThread. 85 mutable std::mutex mThreadMutex; 86 std::thread mThread GUARDED_BY(mThreadMutex); 87 std::atomic<bool> mRunning = true; 88 89 using Work = std::function<void(renderengine::RenderEngine&)>; 90 mutable std::queue<Work> mFunctionCalls GUARDED_BY(mThreadMutex); 91 mutable std::condition_variable mCondition; 92 93 // Used to allow select thread safe methods to be accessed without requiring the 94 // method to be invoked on the RenderEngine thread 95 bool mIsInitialized = false; 96 mutable std::mutex mInitializedMutex; 97 mutable std::condition_variable mInitializedCondition; 98 99 /* ------------------------------------------------------------------------ 100 * Render Engine 101 */ 102 std::unique_ptr<renderengine::RenderEngine> mRenderEngine; 103 std::atomic<bool> mIsProtected = false; 104 }; 105 } // namespace threaded 106 } // namespace renderengine 107 } // namespace android 108