1 /* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef IMAGE_RENDER_H 17 #define IMAGE_RENDER_H 18 19 #include <EGL/egl.h> 20 #include <GLES2/gl2.h> 21 22 class ImageRender { 23 public: 24 ImageRender(); 25 ~ImageRender(); 26 27 bool InitEGL(EGLNativeWindowType window, uint64_t width, uint64_t height); 28 bool MakeCurrentContext(); 29 void UpdateViewport(); 30 void UpdateWindowInfo(uint64_t width, uint64_t height); 31 void SetTexture(GLuint textureId, GLuint textureTarget); 32 void Render(); 33 void Cleanup(); 34 void SetTransformMatrix(const float matrix[16]); 35 36 private: 37 void SetupVertexAttributes(); 38 void DisableVertexAttributes(); 39 bool InitializeEGLDisplay(); 40 bool ChooseEGLConfig(); 41 bool CreateEGLContext(); 42 bool CreateEGLSurface(); 43 bool CompileAndLinkShaders(); 44 void PrintProgramLinkError(GLuint program); 45 GLuint CompileShader(GLenum type, const char* source); 46 void PrintShaderCompileError(GLuint shader); 47 48 EGLDisplay display_ = EGL_NO_DISPLAY; 49 EGLSurface surface_ = EGL_NO_SURFACE; 50 EGLContext context_ = EGL_NO_CONTEXT; 51 EGLConfig config_ = nullptr; 52 EGLNativeWindowType window_ = 0; 53 uint64_t width_ = 0; 54 uint64_t height_ = 0; 55 GLuint shaderProgram_ = 0; 56 GLint positionAttrib_ = -1; 57 GLint texCoordAttrib_ = -1; 58 GLint textureUniform_ = -1; 59 GLuint textureId_ = 0; 60 GLuint textureTarget_ = 0; 61 float transformMatrix_[16] = { 0.0f }; 62 }; 63 64 #endif // IMAGE_RENDER_H 65