CanvasContext.h revision 860d155f866cc15a725e7ce03763280987f24901 
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
29#define FUNCTOR_PROCESS_DELAY 4
30
31namespace android {
32namespace uirenderer {
33
34class DeferredLayerUpdater;
35class OpenGLRenderer;
36class Rect;
37class Layer;
38
39namespace renderthread {
40
41class GlobalContext;
42class CanvasContext;
43class RenderThread;
44
45// This per-renderer class manages the bridge between the global EGL context
46// and the render surface.
47class CanvasContext {
48public:
49    CanvasContext(bool translucent);
50    ~CanvasContext();
51
52    bool initialize(EGLNativeWindowType window);
53    void updateSurface(EGLNativeWindowType window);
54    void pauseSurface(EGLNativeWindowType window);
55    void setup(int width, int height);
56    void makeCurrent();
57    void processLayerUpdates(const Vector<DeferredLayerUpdater*>* layerUpdaters, TreeInfo& info);
58    void drawDisplayList(RenderNode* displayList, Rect* dirty);
59    void destroyCanvas();
60
61    bool copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap);
62
63    void invokeFunctor(Functor* functor);
64
65    void runWithGlContext(RenderTask* task);
66
67    Layer* createRenderLayer(int width, int height);
68    Layer* createTextureLayer();
69
70private:
71    void setSurface(EGLNativeWindowType window);
72    void swapBuffers();
73    void requireSurface();
74
75    void requireGlContext();
76
77    GlobalContext* mGlobalContext;
78    RenderThread& mRenderThread;
79    EGLSurface mEglSurface;
80    bool mDirtyRegionsEnabled;
81
82    bool mOpaque;
83    OpenGLRenderer* mCanvas;
84    bool mHaveNewSurface;
85};
86
87} /* namespace renderthread */
88} /* namespace uirenderer */
89} /* namespace android */
90#endif /* CANVASCONTEXT_H_ */
91