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jpg-app-tool

v0.0.6

Published

一个简单截取、修改 jpg 图片 APP 信息的工具库,没有任何依赖,导出若干函数

Downloads

106

Readme

jpg-APP-tool

一个简单截取、修改 jpg 图片 APP 信息的工具库,没有任何依赖,导出若干函数

安装

npm install jpg-app-tool
yarn add jpg-app-tool

使用

import { sliceAPP1, getAPP1 } from "jpg-app-tool";

函数说明

sliceAPP1(dataView, resetOrientation)

截取 jpg 图片的 APP1 字段以 Blob 格式返回

  • dataView <DataView> jpg 的 DataView 格式
  • resetOrientation <Boolean> 若 exif 存在 orientation 字段,是否编辑为 1
  • 返回:
    {
    	APP1, // APP1的blob对象
    	orientation, // 方向值
    }

getAPP1(file, resetOrientation)

截取 jpg 图片的 APP1 字段以 Blob 格式返回

  • file <File> jpg 文件
  • resetOrientation <Boolean> 是若 exif 存在 orientation 字段,是否编辑为 1
  • 返回:如果存在 APP1 字段则返回 APP1 的 Blob 对象,没有或不是 jpg 文件则返回 null

padGetAPP1(file)

截取 jpg 图片的 APP1 字段以 Blob 格式返回,若 exif 存在 orientation 字段则编辑为 1,jpg 编码缺少结尾标识则自动填补

  • file <File> jpg 文件
  • 返回:
    {
    	APP1, // APP1的blob对象
    	orientation, // 方向值
    	newFile, // 如果缺少结尾标识则补位后反回新的blob对象
    }