1/* 2 * Copyright (c) 2024 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 { image } from '@kit.ImageKit'; 17import { BusinessError } from '@kit.BasicServicesKit'; 18import Logger from './Logger'; 19 20 21/** 22 * 读取图片的EXIF信息，并将IMAGE_WIDTH设置为120。 23 * 24 * @param fd - 文件描述符。 25 **/ 26export async function readAndEditEXIF(fd: number) { 27 Logger.info('readAndEditEXIF Start'); 28 // [Start pixelmap_create_image_source_by_fd_in_edit] 29 // 获取沙箱路径创建ImageSource 30 const imageSourceApi: image.ImageSource = image.createImageSource(fd); 31 // [End pixelmap_create_image_source_by_fd_in_edit] 32 if (imageSourceApi == null) { 33 Logger.error('fd undefined'); 34 } 35 // [Start pixelmap_read_and_edit_EXIF_info] 36 // 读取EXIF信息，BitsPerSample为每个像素比特数 37 let options: image.ImagePropertyOptions = { index: 0, defaultValue: '9999' } 38 await imageSourceApi.getImageProperty(image.PropertyKey.BITS_PER_SAMPLE, options).then((data: string) => { 39 Logger.info('Succeeded in getting the value of the specified attribute key of the image.'); 40 }).catch((error: BusinessError) => { 41 Logger.error('Failed to get the value of the specified attribute key of the image.', String(error)); 42 }) 43 44 // 编辑EXIF信息 45 await imageSourceApi.modifyImageProperty(image.PropertyKey.IMAGE_WIDTH, '120').then(() => { 46 imageSourceApi.getImageProperty(image.PropertyKey.IMAGE_WIDTH).then((width: string) => { 47 Logger.info('The new imageWidth is ', width); 48 }).catch((error: BusinessError) => { 49 Logger.error('Failed to get the Image Width.', String(error)); 50 }) 51 }).catch((error: BusinessError) => { 52 Logger.error('Failed to modify the Image Width.', String(error)); 53 }) 54 // [End pixelmap_read_and_edit_EXIF_info] 55 56 Logger.info('readAndEditEXIF End'); 57}