1 // Copyright (C) 2017 The Android Open Source Project 2 // 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 #pragma once 16 17 #include "OpenGLESDispatch/EGLDispatch.h" 18 #include "OpenGLESDispatch/GLESv1Dispatch.h" 19 #include "OpenGLESDispatch/GLESv2Dispatch.h" 20 21 namespace gfxstream { 22 namespace gl { 23 24 // Helper classes to hold global EGLDispatch, GLESv1Dispatch and GLESv2Dispatch 25 // objects, initialized lazily in a thread-safe way. The instances are leaked on 26 // program exit. 27 28 struct LazyLoadedGLESv1Dispatch { 29 // Return pointer to global GLESv1Dispatch instance, or nullptr if there 30 // was an error when trying to initialize/load the library. 31 static const GLESv1Dispatch* get(); 32 33 LazyLoadedGLESv1Dispatch(); 34 35 private: 36 bool mValid; 37 }; 38 39 struct LazyLoadedGLESv2Dispatch { 40 // Return pointer to global GLESv2Dispatch instance, or nullptr if there 41 // was an error when trying to initialize/load the library. 42 static const GLESv2Dispatch* get(); 43 44 LazyLoadedGLESv2Dispatch(); 45 46 private: 47 bool mValid; 48 }; 49 50 // Note that the dispatch table is provided by libOpenGLESDispatch as the 51 // 's_egl' global variable. 52 struct LazyLoadedEGLDispatch { 53 // Return pointer to EGLDispatch table, or nullptr if there was 54 // an error when trying to initialize/load the library. 55 static const EGLDispatch* get(); 56 57 LazyLoadedEGLDispatch(); 58 59 private: 60 bool mValid; 61 }; 62 63 } // namespace gl 64 } // namespace gfxstream