1 /* 2 * Copyright (c) 2022 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 POWERMGR_DISPLAY_MANAGER_DISPLAY_PARAM_HELPER_H 17 #define POWERMGR_DISPLAY_MANAGER_DISPLAY_PARAM_HELPER_H 18 19 #include <cstdint> 20 #include <functional> 21 #include <iosfwd> 22 #include <singleton.h> 23 #include <string> 24 25 namespace OHOS { 26 namespace DisplayPowerMgr { 27 class DisplayParamHelper { 28 public: 29 static uint32_t GetDefaultBrightness(); 30 static uint32_t GetMaxBrightness(); 31 static uint32_t GetMinBrightness(); 32 typedef void (* BootCompletedCallback)(); 33 static void RegisterBootCompletedCallback(BootCompletedCallback&); 34 35 private: 36 static constexpr const char* KEY_DEFAULT_BRIGHTNESS {"const.display.brightness.default"}; 37 static constexpr const char* KEY_MAX_BRIGHTNESS {"const.display.brightness.max"}; 38 static constexpr const char* KEY_MIN_BRIGHTNESS {"const.display.brightness.min"}; 39 static constexpr uint32_t BRIGHTNESS_MIN = 1; 40 static constexpr uint32_t BRIGHTNESS_DEFAULT = 102; 41 static constexpr uint32_t BRIGHTNESS_MAX = 255; 42 }; 43 } // namespace DisplayPowerMgr 44 } // namespace OHOS 45 46 #endif // POWERMGR_DISPLAY_MANAGER_DISPLAY_PARAM_HELPER_H 47