1 /* 2 * Copyright (C) 2020 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 ANDROID_BACKEND_MANAGER_H 18 #define ANDROID_BACKEND_MANAGER_H 19 20 #include <functional> 21 #include <map> 22 #include <string> 23 #include <vector> 24 25 #include "Backend.h" 26 27 // NOLINTNEXTLINE(cppcoreguidelines-macro-usage) 28 #define REGISTER_BACKEND(name_str_, backend_) \ 29 static int \ 30 backend = BackendManager::GetInstance() \ 31 .RegisterBackend(name_str_, \ 32 []() -> std::unique_ptr<Backend> { \ 33 return std::make_unique<backend_>(); \ 34 }); 35 36 namespace android { 37 38 class BackendManager { 39 public: 40 using BackendConstructorT = std::function<std::unique_ptr<Backend>()>; 41 static BackendManager &GetInstance(); 42 int RegisterBackend(const std::string &name, 43 BackendConstructorT backend_constructor); 44 int SetBackendForDisplay(HwcDisplay *display); 45 std::unique_ptr<Backend> GetBackendByName(std::string &name); 46 HWC2::Error ValidateDisplay(HwcDisplay *display, uint32_t *num_types, 47 uint32_t *num_requests); 48 49 private: 50 BackendManager() = default; 51 52 static const std::vector<std::string> kClientDevices; 53 54 std::map<std::string, BackendConstructorT> available_backends_; 55 }; 56 } // namespace android 57 58 #endif 59