1/* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 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 */ 15 16import { Log } from '../utils/Log'; 17import deviceInfo from '@ohos.deviceInfo'; 18 19export default class DisplayCalculator { 20 private static TAG = '[DisplayCalculator]:' 21 22 public static calcSurfaceDisplaySize(screenWidth: number, screenHeight: number, previewWidth: number, 23 previewHeight: number) { 24 const displaySize = { 25 width: 1920, height: 1080 26 } 27 const ratio = previewWidth / previewHeight 28 if (deviceInfo.deviceType == 'tablet' || screenWidth > screenHeight) { 29 if (screenWidth / screenHeight > ratio) { 30 displaySize.width = Math.floor(screenHeight * ratio) 31 displaySize.height = Math.floor(screenHeight) 32 } else { 33 displaySize.width = Math.floor(screenWidth) 34 displaySize.height = Math.floor(screenWidth / ratio) 35 } 36 } else { 37 if (screenWidth / screenHeight > ratio) { 38 displaySize.width = Math.floor(screenHeight / ratio) 39 displaySize.height = Math.floor(screenHeight) 40 } else { 41 displaySize.width = Math.floor(screenWidth) 42 displaySize.height = Math.floor(screenWidth * ratio) 43 } 44 } 45 Log.info(`${this.TAG} calcSurfaceDisplaySize screenWidth=${screenWidth} screenHeight=${screenHeight} `) 46 Log.info(`${this.TAG} calcSurfaceDisplaySize previewWidth=${previewWidth} previewHeight=${previewHeight} displaySize= ${JSON.stringify(displaySize)}`) 47 return displaySize 48 } 49}