CanvasContext.h revision 19b6bcfd83eb7fb92ebd06d2fec89e308311f1d0 
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 DisplayList;
35class OpenGLRenderer;
36class Rect;
37
38namespace renderthread {
39
40class GlobalContext;
41class CanvasContext;
42class RenderThread;
43
44class InvokeFunctorsTask : public RenderTask {
45public:
46    InvokeFunctorsTask(CanvasContext* context)
47        : mContext(context) {}
48
49    virtual void run();
50
51private:
52    CanvasContext* mContext;
53};
54
55// This per-renderer class manages the bridge between the global EGL context
56// and the render surface.
57class CanvasContext {
58public:
59    CanvasContext(bool translucent);
60    ~CanvasContext();
61
62    bool initialize(EGLNativeWindowType window);
63    void updateSurface(EGLNativeWindowType window);
64    void setup(int width, int height);
65    void processLayerUpdates(const Vector<DeferredLayerUpdater*>* layerUpdaters);
66    void drawDisplayList(DisplayList* displayList, Rect* dirty);
67    void destroyCanvas();
68
69    bool copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap);
70
71    void attachFunctor(Functor* functor);
72    void detachFunctor(Functor* functor);
73
74    void runWithGlContext(RenderTask* task);
75
76private:
77    void setSurface(EGLNativeWindowType window);
78    void swapBuffers();
79    void makeCurrent();
80
81    friend class InvokeFunctorsTask;
82    void invokeFunctors();
83    void handleFunctorStatus(int status, const Rect& redrawClip);
84    void removeFunctorsTask();
85    void queueFunctorsTask(int delayMs = FUNCTOR_PROCESS_DELAY);
86
87    void requireGlContext();
88
89    GlobalContext* mGlobalContext;
90    RenderThread& mRenderThread;
91    EGLSurface mEglSurface;
92    bool mDirtyRegionsEnabled;
93
94    bool mOpaque;
95    OpenGLRenderer* mCanvas;
96    bool mHaveNewSurface;
97
98    bool mInvokeFunctorsPending;
99    InvokeFunctorsTask mInvokeFunctorsTask;
100
101};
102
103} /* namespace renderthread */
104} /* namespace uirenderer */
105} /* namespace android */
106#endif /* CANVASCONTEXT_H_ */
107