GLHelper.h revision 70982a5f95f68295244e5f6cc037c193713a5259 
1/*
2 * Copyright (C) 2012 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#include <gui/GraphicBufferAlloc.h>
18#include <gui/GLConsumer.h>
19#include <gui/Surface.h>
20#include <gui/SurfaceControl.h>
21
22#include <EGL/egl.h>
23#include <GLES2/gl2.h>
24
25namespace android {
26
27class SurfaceComposerClient;
28class SurfaceControl;
29
30enum { MAX_SHADER_LINES = 128 };
31
32struct ShaderDesc {
33    const char* name;
34    const char* vertexShader[MAX_SHADER_LINES];
35    const char* fragmentShader[MAX_SHADER_LINES];
36};
37
38class GLHelper {
39
40public:
41
42    enum { DITHER_KERNEL_SIZE = 4 };
43
44    GLHelper();
45
46    ~GLHelper();
47
48    bool setUp(const ShaderDesc* shaderDescs, size_t numShaders);
49
50    void tearDown();
51
52    bool makeCurrent(EGLSurface surface);
53
54    bool createSurfaceTexture(uint32_t w, uint32_t h,
55            sp<GLConsumer>* surfaceTexture, EGLSurface* surface,
56            GLuint* name);
57
58    bool createWindowSurface(uint32_t w, uint32_t h,
59            sp<SurfaceControl>* surfaceControl, EGLSurface* surface);
60
61    void destroySurface(EGLSurface* surface);
62
63    bool swapBuffers(EGLSurface surface);
64
65    bool getShaderProgram(const char* name, GLuint* outPgm);
66
67    bool getDitherTexture(GLuint* outTexName);
68
69private:
70
71    bool createNamedSurfaceTexture(GLuint name, uint32_t w, uint32_t h,
72            sp<GLConsumer>* surfaceTexture, EGLSurface* surface);
73
74    bool computeWindowScale(uint32_t w, uint32_t h, float* scale);
75
76    bool setUpShaders(const ShaderDesc* shaderDescs, size_t numShaders);
77
78    sp<GraphicBufferAlloc> mGraphicBufferAlloc;
79
80    EGLDisplay mDisplay;
81    EGLContext mContext;
82    EGLSurface mDummySurface;
83    sp<GLConsumer> mDummyGLConsumer;
84    EGLConfig mConfig;
85
86    sp<SurfaceComposerClient> mSurfaceComposerClient;
87
88    GLuint* mShaderPrograms;
89    const ShaderDesc* mShaderDescs;
90    size_t mNumShaders;
91
92    GLuint mDitherTexture;
93};
94
95} // namespace android
96