


Let's talk about how to use node to implement a picture splicing plug-in
怎么使用node实现一个图片拼接插件?下面本篇文章给大家介绍一下使用node封装一个图片拼接插件的方法,希望对大家有所帮助!
平时我们拼接图片的时候一般都要通过ps或者其他图片处理工具来进行处理合成,这次有个需求就需要进行图片拼接,而且我希望是可以直接使用代码进行拼接,于是就有了这么一个工具包。
插件效果
通过该插件,我们可以将图片进行以下操作:
1、横向拼接两张图片
如下,我们有这么两张图片,现在我们可以通过该工具将它们拼接成一张
n1.jpg
n2.jpg
- 代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p1 = { left:'.\\img\\n1.jpg', right:'.\\img\\n2.jpg', target:'.\\longImg' } // 横向拼接两张图片 ImgConcatClass.collapseHorizontal(p1).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
- 效果
2、纵向拼接两张图片
仍是上面的两张图片,我们将其进行纵向拼接
- 代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p1 = { left:'.\\img\\n1.jpg', right:'.\\img\\n2.jpg', target:'.\\longImg' } //纵向拼接两张图片 ImgConcatClass.collapseVertical(p1).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
- 效果
3、批量拼接
我们也可以直接将某一目录中的所有图片进行批量拼接成长图,如下图,我们现在要对该目录下的所有图片进行拼接:
3.1 横向拼接长图
- 代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p = { folderPath:'.\\img', //资源目录 targetFolder:'.\\longImg', //转换后图片存放目录 direction:'y' //拼接方向,y为横向,n为纵向 } // 拼接目录下的所有图片 ImgConcatClass.concatAll(p).then(res=>{ console.log(`拼接完成,图片路径为${res}`); })
- 效果
3.2 纵向拼接长图
- 代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p = { folderPath:'.\\img', //资源目录 targetFolder:'.\\longImg', //转换后图片存放目录 direction:'n' //拼接方向,y为横向,n为纵向 } // 拼接目录下的所有图片 ImgConcatClass.concatAll(p).then(res=>{ console.log(`拼接完成,图片路径为${res}`); })
- 效果
4、自定义拼接矩阵
我们也可以自己定义图片拼接矩阵,shape
为二维数组,定义各个位置的图片,具体如下:
- 代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p = { shape:[['.\\img\\n1.jpg','.\\img\\white.jpg','.\\img\\n2.jpg'], ['.\\img\\white.jpg','.\\img\\n3.jpg','.\\img\\white.jpg'], ['.\\img\\n4.jpg','.\\img\\white.jpg','.\\img\\n5.jpg'] ], target:'.\\longImg' }; //自定义矩阵拼接图片 ImgConcatClass.conCatByMaxit(p).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
- 效果
插件实现
单张图片拼接
使用GraphicsMagick进行图片拼接
const gm = require('gm'); collapse (left,right,target,flag = true) { return new Promise((r) => { gm(left).append(right,flag).write(target, err => { if(err) console.log(err); r(); }) }) }
批量拼接
- 使用sharp.js获取图片信息,调整图片分辨率大小
- 使用fs获取文件列表
- 使用path拼接文件路径
- 使用 @jyeontu/progress-bar打印进度条
const gm = require('gm'); const fs = require('fs'); const path = require('path'); const progressBar = require('@jyeontu/progress-bar'); const {getFileSuffix,getMetadata,resizeImage} = require('./util'); doConcatAll = async(folderPath,targetFolder,direction) => { let fileList = fs.readdirSync(folderPath); fileList.sort((a, b) => { return path.basename(a) - path.basename(b); }); const extensionName = getFileSuffix(fileList[0], "."); let targetFilePath = path.join(targetFolder, new Date().getTime() + '.' + extensionName); const barConfig = { duration: fileList.length - 1, current: 0, block:'█', showNumber:true, tip:{ 0: '拼接中……', 100:'拼接完成' }, color:'green' }; let progressBarC = new progressBar(barConfig); const imgInfo = await this.getImgInfo(path.join(folderPath, fileList[0])); for (let index = 1; index <h3 id="strong-自定义矩阵拼接-strong"><strong>自定义矩阵拼接</strong></h3><pre class="brush:php;toolbar:false">const gm = require('gm'); const fs = require('fs'); const path = require('path'); const progressBar = require('@jyeontu/progress-bar'); const {getFileSuffix,getMetadata,resizeImage} = require('./util'); async conCatByMaxit(res){ const {shape} = res; const tmpList = []; const barConfig = { duration: shape[0].length * shape.length, current: 0, block:'█', showNumber:true, tip:{ 0: '拼接中……', 100:'拼接完成' }, color:'green' }; const progressBarC = new progressBar(barConfig); let target = ''; let extensionName = getFileSuffix(shape[0][0], "."); const imgInfo = await this.getImgInfo(shape[0][0]); for(let i = 0; i 0){ await this.collapse(res.target + '\\' + `targetImg${i - 1}.${extensionName}`,target,target,false); } } progressBarC.run(shape[0].length * shape.length); const newTarget = res.target + '\\' + new Date().getTime() + `.${extensionName}`; fs.renameSync(target,newTarget) for(let i = 0; i <h2 id="strong-插件使用-strong"><strong>插件使用</strong></h2><h3 id="strong-依赖引入-strong"><strong>依赖引入</strong></h3><pre class="brush:php;toolbar:false">const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat();
横向拼接两张图片
参数说明
- left
左边图片路径
- right
右边图片路径
- target
合成图片保存目录
示例代码
const p1 = { left:'.\\img\\n1.jpg', right:'.\\img\\n2.jpg', target:'.\\longImg' } // 横向拼接两张图片 ImgConcatClass.collapseHorizontal(p1).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
纵向拼接两张图片
参数说明
- left
左边图片路径
- right
右边图片路径
- target
合成图片保存目录
示例代码
const p1 = { left:'.\\img\\n1.jpg', right:'.\\img\\n2.jpg', target:'.\\longImg' } // 纵向拼接两张图片 ImgConcatClass.collapseVertical(p1).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
批量拼接
参数说明
- folderPath
资源文件目
- targetFolder
合并图片保存目录
- direction
图片合并方向,y为横向,n为纵向
示例代码
const consoleInput = require('@jyeontu/img-concat'); const ImgConcatClass = new ImgConcat(); const p = { folderPath:'.\\img', //资源目录 targetFolder:'.\\longImg', //合并后图片存放目录 direction:'y' //拼接方向,y为横向,n为纵向 } // 拼接目录下的所有图片 ImgConcatClass.concatAll(p).then(res=>{ console.log(`拼接完成,图片路径为${res}`); })
自定义拼接矩阵
参数说明
- shape
图片合并矩阵,传入各个位置的图片路径。
- target
合并后图片的保存路径
示例代码
const p = { shape:[['.\\img\\n1.jpg','.\\img\\white.jpg','.\\img\\n2.jpg'], ['.\\img\\white.jpg','.\\img\\n3.jpg','.\\img\\white.jpg'], ['.\\img\\n4.jpg','.\\img\\white.jpg','.\\img\\n5.jpg'] ], target:'.\\longImg' }; //自定义矩阵拼接图片 ImgConcatClass.conCatByMaxit(p).then(res=>{ console.log(`拼接完成,图片路径为${res}`); });
源码地址
https://gitee.com/zheng_yongtao/node-scripting-tool/tree/master/src/imgConcat
更多node相关知识,请访问:nodejs 教程!
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