压缩

common/translate-image.js

@@ -1,100 +0,0 @@
-/**
-
-* 压缩
-
-* @param {Object} imgSrc 图片url
-
-* @param {Object} callback 回调设置返回值
-
-*/
-
-export function translate(imgSrc) {
-
-var img = new Image();
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-img.src = imgSrc;
-
-img.onload = function() {
-
-var that = this;
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-var h = that.height;
-
-// 默认按比例压缩
-
-var w = that.width;
-
-var canvas = document.createElement('canvas');
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-var ctx = canvas.getContext('2d');
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-var anw = document.createAttribute("width");
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-anw.nodeValue = w;
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-var anh = document.createAttribute("height");
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-anh.nodeValue = h;
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-canvas.setAttributeNode(anw);
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-canvas.setAttributeNode(anh);
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-ctx.drawImage(that, 0, 0, w, h);
-
-//压缩比例
-
-var quality = 0.7;
-
-var base64 = canvas.toDataURL('image/jpeg', quality);
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-canvas = null;
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-var blob=base64ToBlob(base64);
-
-// console.log(blob)
-
-//Blob对象转blob地址
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-var blobUrl=window.URL.createObjectURL(blob);
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-return blobUrl;
-
-}
-
-}
-
-/**
-
-* base转Blob对象
-
-* @param {Object} base64 base64地址
-
-*/
-
-export function base64ToBlob(base64) {
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-var arr = base64.split(','),
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-mime = arr[0].match(/:(.*?);/)[1],
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-bstr = atob(arr[1]),
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-n = bstr.length,
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-u8arr = new Uint8Array(n);
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-while (n--) {
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-u8arr[n] = bstr.charCodeAt(n);
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-}
-
-return new Blob([u8arr], {
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-type: mime
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-});
-
-}
-