图片压缩

imageInfo/Sprite.js

@@ -0,0 +1,117 @@
+const fs = require('fs');
+const images = require('images');
+
+
+/*
+* 原理 将两张图片合成一张
+*
+* */
+let option = {
+    dirPath : './images/',
+    outputPath:'./images/',
+    outputName : 'sprites.png',
+    spacing : 10,
+};
+
+function Sprite(option) {
+
+    this.option = option;
+
+    this.init();
+}
+
+
+Sprite.prototype.init = function(){
+
+    this.imagesAry = this.filterImages(this.getAllImagesAry(this.option.dirPath)); // 获取图片并过滤不是图片的资源
+
+    this.createSprites();
+
+};
+
+Sprite.prototype.createSprites = function(){
+
+    this.createFirstSprites(); // 创建第一张雪碧图
+
+
+};
+
+Sprite.prototype.synthetic = function(){ //将两张图片合成一张
+
+};
+
+Sprite.prototype.createFirstSprites = function(){ //创建第一张雪碧图
+
+    let firstImage = this.imagesAry.pop();
+
+    let imagePath = this.getImagePath(firstImage);
+
+    let {w,h} = this.getImageSize(imagePath);
+
+    let outputPath = this.option.outputPath + this.option.outputName;
+    console.log(imagePath);
+    images(w + this.option.spacing,h + this.option.spacing)
+        .draw(images(imagePath),0,0)
+        .save(outputPath)
+
+
+};
+
+Sprite.prototype.createEmptyImage = function(w,h){ //创建空白图层
+
+    let path = this.option.outputPath + this.option.outputName;
+
+    images(w,h).save(path);
+
+};
+
+Sprite.prototype.getImagePath = function(imageName){
+    /* 这个 要加路径判断 判断最后路径 有没有 / */
+
+    return this.option.dirPath + imageName;
+};
+
+Sprite.prototype.getImageSize = function(dirPath){
+
+    let size = images(dirPath);
+
+    return {w:size.width(),h:size.height()};
+
+};
+
+Sprite.prototype.getAllImagesAry = function(dirPath){
+
+    let result = [];
+
+    try {
+        result = fs.readdirSync(dirPath);
+    }catch (e){
+        console.log(e);
+        result = [];
+    }
+
+    return result;
+};
+
+Sprite.prototype.filterImages = function(imagesAry){
+
+    let formatAry = ['bmp','png','jpeg','gif'];
+
+    let newAry = [];
+
+    imagesAry.forEach((item,index)=>{
+
+        let suffix = item.split('.')[1];
+
+        if(formatAry.indexOf(suffix) != -1){ //  如果 judge 里面有 说明是图片
+            newAry.push(item);
+        }
+    });
+
+    return newAry;
+
+};
+
+
+
+var sprite = new Sprite(option);

imageInfo/imageOrganic.js

@@ -0,0 +1,6 @@
+const fs = require('fs');
+const images = require('images');
+
+images(1000,1000)
+    .draw(images("./images/logo.png"), 80, 80)
+    .save('outer.png');

imageInfo/index.js

@@ -35,7 +35,7 @@ DealImages.prototype.readAllImages = function(){
 
 DealImages.prototype.filterImages = function(data){
 
-    let formatAry = ['bmp','png','jpeg','gif']
+    let formatAry = ['bmp','png','jpeg','gif'];
 
     let newAry = [];
 

imageOrganic/index.js

@@ -0,0 +1,11 @@
+const fs = require('fs');
+const gm = require('gm');
+const path = require('path');
+var imageMagick = gm.subClass({ imageMagick: true });
+
+gm('done.png')
+    .size(function (err, size) {
+        console.log(arguments);
+        if (!err)
+            console.log(size.width > size.height ? 'wider' : 'taller than you');
+    });