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