CanvasContext.h revision f9be77940e365036fecd8cc0e491e8545c34e79b
1/* 2 * Copyright (C) 2014 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#ifndef CANVASCONTEXT_H_ 18#define CANVASCONTEXT_H_ 19 20#include <cutils/compiler.h> 21#include <EGL/egl.h> 22#include <SkBitmap.h> 23#include <utils/Functor.h> 24#include <utils/Vector.h> 25 26#include "../RenderNode.h" 27#include "RenderTask.h" 28#include "RenderThread.h" 29 30#define FUNCTOR_PROCESS_DELAY 4 31 32namespace android { 33namespace uirenderer { 34 35class DeferredLayerUpdater; 36class OpenGLRenderer; 37class Rect; 38class Layer; 39 40namespace renderthread { 41 42class GlobalContext; 43 44// This per-renderer class manages the bridge between the global EGL context 45// and the render surface. 46class CanvasContext : public IFrameCallback { 47public: 48 CanvasContext(bool translucent, RenderNode* rootRenderNode); 49 virtual ~CanvasContext(); 50 51 bool initialize(EGLNativeWindowType window); 52 void updateSurface(EGLNativeWindowType window); 53 void pauseSurface(EGLNativeWindowType window); 54 void setup(int width, int height); 55 void makeCurrent(); 56 void prepareDraw(const Vector<DeferredLayerUpdater*>* layerUpdaters, TreeInfo& info); 57 void draw(Rect* dirty); 58 void destroyCanvasAndSurface(); 59 60 // IFrameCallback, Chroreographer-driven frame callback entry point 61 virtual void doFrame(); 62 63 bool copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap); 64 65 void invokeFunctor(Functor* functor); 66 67 void runWithGlContext(RenderTask* task); 68 69 Layer* createRenderLayer(int width, int height); 70 Layer* createTextureLayer(); 71 72private: 73 void processLayerUpdates(const Vector<DeferredLayerUpdater*>* layerUpdaters, TreeInfo& info); 74 void prepareTree(TreeInfo& info); 75 76 void setSurface(EGLNativeWindowType window); 77 void swapBuffers(); 78 void requireSurface(); 79 80 void requireGlContext(); 81 82 GlobalContext* mGlobalContext; 83 RenderThread& mRenderThread; 84 EGLSurface mEglSurface; 85 bool mDirtyRegionsEnabled; 86 87 bool mOpaque; 88 OpenGLRenderer* mCanvas; 89 bool mHaveNewSurface; 90 91 const sp<RenderNode> mRootRenderNode; 92}; 93 94} /* namespace renderthread */ 95} /* namespace uirenderer */ 96} /* namespace android */ 97#endif /* CANVASCONTEXT_H_ */ 98