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 25 namespace android { 26 27 class SurfaceComposerClient; 28 class SurfaceControl; 29 30 enum { MAX_SHADER_LINES = 128 }; 31 32 struct ShaderDesc { 33 const char* name; 34 const char* vertexShader[MAX_SHADER_LINES]; 35 const char* fragmentShader[MAX_SHADER_LINES]; 36 }; 37 38 class GLHelper { 39 40 public: 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 69 private: 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
