1// Copyright (C) 2023 The Android Open Source Project 2// 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 15export type RedrawCallback = () => void; 16 17export interface Raf { 18 /** 19 * Schedule both a DOM and canvas redraw. 20 */ 21 scheduleFullRedraw(): void; 22 23 /** 24 * Schedule a canvas redraw only. 25 */ 26 scheduleCanvasRedraw(): void; 27 28 /** 29 * Add a callback for canvas redraws. `cb` will be called whenever a canvas 30 * redraw is scheduled canvas redraw using {@link scheduleCanvasRedraw()}. 31 * 32 * @param cb - The callback to called when canvas are redrawn. 33 * @returns - A disposable object that removes the callback when disposed. 34 */ 35 addCanvasRedrawCallback(cb: RedrawCallback): Disposable; 36} 37