Use the images+imageinfo library to add watermarks to images in batches in the Node project

How to add watermarks to images in batches in Nodejs? The following article will introduce to you how to use the images imageinfo library to add watermarks to pictures in batches in the Node project. I hope it will be helpful to you!

NodejsAdd watermarks to images in batches

Environment preparation

Install images library

npm install images

Install imageinfo library

npm install imageinfo

Implementation

In this example, addimageinfo.js is in the same directory as marklogo.png, imagest folder, and node_modules folder.

Sub-files can also be implemented

JS code

If you use it directly, you need to modify the information

var logomarkimg = images('./marklogo.png');//水印位置
var rmimgpath = "./imagest/img/";//添加图片文件加位置
var mark = "logo_";//另存图片前缀，若为""则替换原图片

Full code addimageinfo. js

//引用文件系统模块
var fs = require("fs");
//引用imageinfo模块
var imageInfo = require("imageinfo");
//引用images模块
var images = require('images');

var logomarkimg = images('./marklogo.png');//水印位置
var rmimgpath = "./imagest/img/";//添加图片文件加位置
var mark = "logo_";//另存图片前缀，若为""则替换原图片

function readFileList(path, filesList) {
    var files = fs.readdirSync(path);
    files.forEach(function (itm, index) {
        var stat = fs.statSync(path + itm);
        if (stat.isDirectory()) {
            //递归读取文件
            readFileList(path + itm + "/", filesList)
        } else {
            var obj = {};//定义一个对象存放文件的路径和名字
            obj.path = path;//路径
            obj.filename = itm//名字
            filesList.push(obj);
        }
    })
}
var getFiles = {

    //获取文件夹下的所有文件
    getFileList: function (path) {
        var filesList = [];
        readFileList(path, filesList);
        return filesList;
    },
    //获取文件夹下的所有图片
    getImageFiles: function (path) {
        var imageList = [];
        this.getFileList(path).forEach((item) => {
            var ms = imageInfo(fs.readFileSync(item.path + item.filename));
            ms.mimeType && (imageList.push(item))
        });
        return imageList;
    }
};
//获取文件夹下的所有图片
var photos = getFiles.getImageFiles(rmimgpath);
for (var i = 0; i < photos.length; i++) {
    var sourceImgpath = photos[i].path;
    var sourceImgname = photos[i].filename;
    var sourceImg = images(sourceImgpath + sourceImgname);
    var sWidth = sourceImg.width();
    var sHeight = sourceImg.height();
    var wmWidth = logomarkimg.width();
    var wmHeight = logomarkimg.height();

    images(sourceImg)
        // 设置绘制的坐标位置，右下角距离 10px
        .draw(logomarkimg, sWidth - wmWidth - 10, sHeight - wmHeight - 10)
        // 保存格式会自动识别
        .save(sourceImgpath + mark + sourceImgname + '');
}

Run

In the directory, run the node command

node ./addimageinfo.js

View the effect

##For more node-related knowledge, please visit:

nodejs tutorial!

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