CanvasContext.h revision 1949e7928eeec22cd3f74b5f763a4eb433238453 
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 "RenderTask.h"
27
28#define FUNCTOR_PROCESS_DELAY 4
29
30namespace android {
31namespace uirenderer {
32
33class DeferredLayerUpdater;
34class RenderNode;
35class DisplayListData;
36class OpenGLRenderer;
37class Rect;
38class Layer;
39
40namespace renderthread {
41
42class GlobalContext;
43class CanvasContext;
44class RenderThread;
45
46class InvokeFunctorsTask : public RenderTask {
47public:
48    InvokeFunctorsTask(CanvasContext* context)
49        : mContext(context) {}
50
51    virtual void run();
52
53private:
54    CanvasContext* mContext;
55};
56
57// This per-renderer class manages the bridge between the global EGL context
58// and the render surface.
59class CanvasContext {
60public:
61    CanvasContext(bool translucent);
62    ~CanvasContext();
63
64    bool initialize(EGLNativeWindowType window);
65    void updateSurface(EGLNativeWindowType window);
66    void setup(int width, int height);
67    void setDisplayListData(RenderNode* displayList, DisplayListData* newData);
68    void processLayerUpdates(const Vector<DeferredLayerUpdater*>* layerUpdaters);
69    void drawDisplayList(RenderNode* displayList, Rect* dirty);
70    void destroyCanvas();
71
72    bool copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap);
73
74    void attachFunctor(Functor* functor);
75    void detachFunctor(Functor* functor);
76    void invokeFunctor(Functor* functor);
77
78    void runWithGlContext(RenderTask* task);
79
80    Layer* createRenderLayer(int width, int height);
81    Layer* createTextureLayer();
82
83private:
84    void setSurface(EGLNativeWindowType window);
85    void swapBuffers();
86    void makeCurrent();
87
88    friend class InvokeFunctorsTask;
89    void invokeFunctors();
90    void removeFunctorsTask();
91    void queueFunctorsTask(int delayMs = FUNCTOR_PROCESS_DELAY);
92
93    void requireGlContext();
94
95    GlobalContext* mGlobalContext;
96    RenderThread& mRenderThread;
97    EGLSurface mEglSurface;
98    bool mDirtyRegionsEnabled;
99
100    bool mOpaque;
101    OpenGLRenderer* mCanvas;
102    bool mHaveNewSurface;
103
104    bool mInvokeFunctorsPending;
105    InvokeFunctorsTask mInvokeFunctorsTask;
106
107};
108
109} /* namespace renderthread */
110} /* namespace uirenderer */
111} /* namespace android */
112#endif /* CANVASCONTEXT_H_ */
113