1 /* 2 * Copyright (C) 2016 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 <utils/RefBase.h> 20 21 namespace android { 22 namespace uirenderer { 23 24 class FrameMetricsObserver : public VirtualLightRefBase { 25 public: 26 virtual void notify(const int64_t* buffer) = 0; waitForPresentTime()27 bool waitForPresentTime() const { return mWaitForPresentTime; }; 28 29 /** 30 * Create a new metrics observer. An observer that watches present time gets notified at a 31 * different time than the observer that doesn't. 32 * 33 * The observer that doesn't want present time is notified about metrics just after the frame 34 * is completed. This is the default behaviour that's used by public API's. 35 * 36 * An observer that watches present time is notified about metrics after the actual display 37 * present time is known. 38 * WARNING! This observer may not receive metrics for the last several frames that the app 39 * produces. 40 */ FrameMetricsObserver(bool waitForPresentTime)41 FrameMetricsObserver(bool waitForPresentTime) : mWaitForPresentTime(waitForPresentTime) {} 42 43 private: 44 const bool mWaitForPresentTime; 45 }; 46 47 } // namespace uirenderer 48 } // namespace android 49