1/* 2 * Copyright (c) 2023 Hunan OpenValley Digital Industry Development 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 */ 15import image from '@ohos.multimedia.image' 16import fs from '@ohos.file.fs'; 17 18export async function readImage(uri: string, decodingOptions?: image.DecodingOptions): Promise<PixelMap | null> { 19 const prefix: string = 'file:/'; 20 if (uri.startsWith('file://media')) { 21 } else if (prefix) { 22 uri = uri.substr(prefix.length); 23 } 24 // path参数为文件的应用沙箱路径或文件URI，所以使用沙箱路径时，需要去掉前缀 25 const file: fs.File = await fs.open(uri, fs.OpenMode.READ_ONLY); 26 let imageSourceApi: image.ImageSource = image.createImageSource(file.fd); 27 if (!imageSourceApi) { 28 return null; 29 } 30 let pixmap: image.PixelMap; 31 if (decodingOptions) { 32 pixmap = await imageSourceApi.createPixelMap(decodingOptions); 33 } else { 34 pixmap = await imageSourceApi.createPixelMap(); 35 } 36 if (!pixmap) { 37 return null; 38 } 39 return pixmap; 40}