EglManager.h revision f35c939cd70f2815582d08902ade0b9abbee6bec 
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#ifndef EGLMANAGER_H
17#define EGLMANAGER_H
18
19#include <cutils/compiler.h>
20#include <EGL/egl.h>
21#include <SkRect.h>
22#include <ui/GraphicBuffer.h>
23#include <utils/StrongPointer.h>
24
25namespace android {
26namespace uirenderer {
27namespace renderthread {
28
29class RenderThread;
30
31// This class contains the shared global EGL objects, such as EGLDisplay
32// and EGLConfig, which are re-used by CanvasContext
33class EglManager {
34public:
35    // Returns true on success, false on failure
36    void initialize();
37
38    bool hasEglContext();
39
40    EGLSurface createSurface(EGLNativeWindowType window);
41    void destroySurface(EGLSurface surface);
42
43    void destroy();
44
45    bool isCurrent(EGLSurface surface) { return mCurrentSurface == surface; }
46    // Returns true if the current surface changed, false if it was already current
47    bool makeCurrent(EGLSurface surface, EGLint* errOut = nullptr);
48    void beginFrame(EGLSurface surface, EGLint* width, EGLint* height);
49    bool swapBuffers(EGLSurface surface, const SkRect& dirty, EGLint width, EGLint height);
50
51    // Returns true iff the surface is now preserving buffers.
52    bool setPreserveBuffer(EGLSurface surface, bool preserve);
53
54    void setTextureAtlas(const sp<GraphicBuffer>& buffer, int64_t* map, size_t mapSize);
55
56    void fence();
57
58private:
59    friend class RenderThread;
60
61    explicit EglManager(RenderThread& thread);
62    // EglContext is never destroyed, method is purposely not implemented
63    ~EglManager();
64
65    void createPBufferSurface();
66    void loadConfig();
67    void createContext();
68    void initAtlas();
69
70    RenderThread& mRenderThread;
71
72    EGLDisplay mEglDisplay;
73    EGLConfig mEglConfig;
74    EGLContext mEglContext;
75    EGLSurface mPBufferSurface;
76
77    const bool mAllowPreserveBuffer;
78    bool mCanSetPreserveBuffer;
79
80    EGLSurface mCurrentSurface;
81
82    sp<GraphicBuffer> mAtlasBuffer;
83    int64_t* mAtlasMap;
84    size_t mAtlasMapSize;
85};
86
87} /* namespace renderthread */
88} /* namespace uirenderer */
89} /* namespace android */
90
91#endif /* EGLMANAGER_H */
92