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