1 /* 2 * Copyright (C) 2020 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 package android.view; 18 19 import android.graphics.FrameInfo; 20 import android.os.IInputConstants; 21 22 /** 23 * The timing information of events taking place in ViewRootImpl 24 * @hide 25 */ 26 public class ViewFrameInfo { 27 public long drawStart; 28 29 30 // Various flags set to provide extra metadata about the current frame. See flag definitions 31 // inside FrameInfo. 32 // @see android.graphics.FrameInfo.FLAG_WINDOW_LAYOUT_CHANGED 33 public long flags; 34 35 private int mInputEventId; 36 37 /** 38 * Populate the missing fields using the data from ViewFrameInfo 39 * @param frameInfo : the structure FrameInfo object to populate 40 */ populateFrameInfo(FrameInfo frameInfo)41 public void populateFrameInfo(FrameInfo frameInfo) { 42 frameInfo.frameInfo[FrameInfo.FLAGS] |= flags; 43 frameInfo.frameInfo[FrameInfo.DRAW_START] = drawStart; 44 frameInfo.frameInfo[FrameInfo.INPUT_EVENT_ID] = mInputEventId; 45 } 46 47 /** 48 * Reset this data. Should typically be invoked after calling "populateFrameInfo". 49 */ reset()50 public void reset() { 51 drawStart = 0; 52 mInputEventId = IInputConstants.INVALID_INPUT_EVENT_ID; 53 flags = 0; 54 } 55 56 /** 57 * Record the current time, and store it in 'drawStart' 58 */ markDrawStart()59 public void markDrawStart() { 60 drawStart = System.nanoTime(); 61 } 62 63 /** 64 * Assign the value for input event id 65 * @param eventId the id of the input event 66 */ setInputEvent(int eventId)67 public void setInputEvent(int eventId) { 68 mInputEventId = eventId; 69 } 70 } 71