1 /* 2 * Copyright (C) 2011 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 <binder/IInterface.h> 20 #include <binder/SafeInterface.h> 21 22 #include <utils/Errors.h> 23 24 #include <cstdint> 25 26 namespace android { 27 28 namespace gui { 29 class BitTube; 30 } // namespace gui 31 32 class IDisplayEventConnection : public IInterface { 33 public: 34 DECLARE_META_INTERFACE(DisplayEventConnection) 35 36 /* 37 * stealReceiveChannel() returns a BitTube to receive events from. Only the receive file 38 * descriptor of outChannel will be initialized, and this effectively "steals" the receive 39 * channel from the remote end (such that the remote end can only use its send channel). 40 */ 41 virtual status_t stealReceiveChannel(gui::BitTube* outChannel) = 0; 42 43 /* 44 * setVsyncRate() sets the vsync event delivery rate. A value of 1 returns every vsync event. 45 * A value of 2 returns every other event, etc. A value of 0 returns no event unless 46 * requestNextVsync() has been called. 47 */ 48 virtual status_t setVsyncRate(uint32_t count) = 0; 49 50 /* 51 * requestNextVsync() schedules the next vsync event. It has no effect if the vsync rate is > 0. 52 */ 53 virtual void requestNextVsync() = 0; // Asynchronous 54 }; 55 56 class BnDisplayEventConnection : public SafeBnInterface<IDisplayEventConnection> { 57 public: BnDisplayEventConnection()58 BnDisplayEventConnection() 59 : SafeBnInterface<IDisplayEventConnection>("BnDisplayEventConnection") {} 60 61 status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply, 62 uint32_t flags = 0) override; 63 }; 64 65 } // namespace android 66