1 /* 2 * Copyright (C) 2015 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 #include <gui/DisplayEventReceiver.h> 18 #include <utils/Log.h> 19 #include <utils/Looper.h> 20 21 namespace android { 22 23 class DisplayEventDispatcher : public LooperCallback { 24 public: 25 DisplayEventDispatcher(const sp<Looper>& looper); 26 27 status_t initialize(); 28 void dispose(); 29 status_t scheduleVsync(); 30 31 protected: 32 virtual ~DisplayEventDispatcher() = default; 33 34 private: 35 sp<Looper> mLooper; 36 DisplayEventReceiver mReceiver; 37 bool mWaitingForVsync; 38 39 virtual void dispatchVsync(nsecs_t timestamp, int32_t id, uint32_t count) = 0; 40 virtual void dispatchHotplug(nsecs_t timestamp, int32_t id, bool connected) = 0; 41 42 virtual int handleEvent(int receiveFd, int events, void* data); 43 bool processPendingEvents(nsecs_t* outTimestamp, int32_t* id, uint32_t* outCount); 44 }; 45 } 46