1 /* 2 * Copyright 2013 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 SCREENRECORD_PROGRAM_H 18 #define SCREENRECORD_PROGRAM_H 19 20 #include <utils/Errors.h> 21 22 #include <EGL/egl.h> 23 #include <GLES2/gl2.h> 24 25 namespace android { 26 27 /* 28 * Utility class for GLES rendering. 29 * 30 * Not thread-safe. 31 */ 32 class Program { 33 public: 34 enum ProgramType { PROGRAM_UNKNOWN=0, PROGRAM_EXTERNAL_TEXTURE, 35 PROGRAM_TEXTURE_2D }; 36 Program()37 Program() : 38 mProgramType(PROGRAM_UNKNOWN), 39 mProgram(0), 40 maPositionLoc(0), 41 maTextureCoordLoc(0), 42 muMVPMatrixLoc(0), 43 muGLCMatrixLoc(0), 44 muTextureLoc(0) 45 {} ~Program()46 ~Program() { release(); } 47 48 // Initialize the program for use with the specified texture type. 49 status_t setup(ProgramType type); 50 51 // Release the program and associated resources. 52 void release(); 53 54 // Blit the specified texture to { x, y, x+w, y+h }. Inverts the 55 // content if "invert" is set. 56 status_t blit(GLuint texName, const float* texMatrix, 57 int32_t x, int32_t y, int32_t w, int32_t h, 58 bool invert = false) const; 59 60 // Draw a number of triangles. 61 status_t drawTriangles(GLuint texName, const float* texMatrix, 62 const float* vertices, const float* texes, size_t count) const; 63 64 static const float kIdentity[]; 65 66 private: 67 Program(const Program&); 68 Program& operator=(const Program&); 69 70 // Common code for draw functions. 71 status_t beforeDraw(GLuint texName, const float* texMatrix, 72 const float* vertices, const float* texes, bool invert) const; 73 status_t afterDraw() const; 74 75 // GLES 2 shader utilities. 76 status_t createProgram(GLuint* outPgm, const char* vertexShader, 77 const char* fragmentShader); 78 static status_t compileShader(GLenum shaderType, const char* src, 79 GLuint* outShader); 80 static status_t linkShaderProgram(GLuint vs, GLuint fs, GLuint* outPgm); 81 82 ProgramType mProgramType; 83 GLuint mProgram; 84 85 GLint maPositionLoc; 86 GLint maTextureCoordLoc; 87 GLint muMVPMatrixLoc; 88 GLint muGLCMatrixLoc; 89 GLint muTextureLoc; 90 }; 91 92 }; // namespace android 93 94 #endif /*SCREENRECORD_PROGRAM_H*/ 95