1 /* 2 * Copyright (c) 2021 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 VSYNC_IVSYNC_CONNECTION_H 17 #define VSYNC_IVSYNC_CONNECTION_H 18 19 #include <iremote_broker.h> 20 #include "graphic_common.h" 21 22 namespace OHOS { 23 namespace Rosen { 24 class IVSyncConnection : public IRemoteBroker { 25 public: 26 virtual VsyncError RequestNextVSync() = 0; 27 28 virtual VsyncError GetReceiveFd(int32_t &fd) = 0; 29 30 // We assume that the vsync frequency is FREQ: 31 // if rate <= 0, we just return error 32 // if rate > 0, we will continue to send Vsync signals at a frequency of FREQ / rate 33 virtual VsyncError SetVSyncRate(int32_t rate) = 0; 34 35 virtual VsyncError GetVSyncPeriod(int64_t &period) = 0; 36 37 DECLARE_INTERFACE_DESCRIPTOR(u"IVSyncConnection"); 38 39 protected: 40 enum { 41 IVSYNC_CONNECTION_REQUEST_NEXT_VSYNC, 42 IVSYNC_CONNECTION_GET_RECEIVE_FD, 43 IVSYNC_CONNECTION_SET_RATE, 44 IVSYNC_CONNECTION_GET_PERIOD, 45 }; 46 }; 47 } // namespace Vsync 48 } // namespace OHOS 49 50 #endif // VSYNC_IVSYNC_CONNECTION_H 51