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image-compressor.min.js

image-compressor.min.js 6.3 KB
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  1. /*!
    2. 

  2.  * Image Compressor v1.1.3
    3. 

  3.  * https://github.com/xkeshi/image-compressor
    4. 

  4.  *
    5. 

  5.  * Copyright (c) 2017-2018 Xkeshi
    6. 

  6.  * Released under the MIT license
    7. 

  7.  *
    8. 

  8.  * Date: 2018-03-23T01:35:12.857Z
    9. 

  9.  */
    10. 

  10. !function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.ImageCompressor=t()}(this,function(){"use strict";var e,k=(function(e){var t,a,s,f,h,d,i;t=window,a=t.HTMLCanvasElement&&t.HTMLCanvasElement.prototype,s=t.Blob&&function(){try{return Boolean(new Blob)}catch(e){return!1}}(),f=s&&t.Uint8Array&&function(){try{return 100===new Blob([new Uint8Array(100)]).size}catch(e){return!1}}(),h=t.BlobBuilder||t.WebKitBlobBuilder||t.MozBlobBuilder||t.MSBlobBuilder,d=/^data:((.*?)(;charset=.*?)?)(;base64)?,/,i=(s||h)&&t.atob&&t.ArrayBuffer&&t.Uint8Array&&function(e){var t,r,n,a,i,o,l,u,c;if(!(t=e.match(d)))throw new Error("invalid data URI");for(r=t[2]?t[1]:"text/plain"+(t[3]||";charset=US-ASCII"),n=!!t[4],a=e.slice(t[0].length),i=n?atob(a):decodeURIComponent(a),o=new ArrayBuffer(i.length),l=new Uint8Array(o),u=0;u<i.length;u+=1)l[u]=i.charCodeAt(u);return s?new Blob([f?l:o],{type:r}):((c=new h).append(o),c.getBlob(r))},t.HTMLCanvasElement&&!a.toBlob&&(a.mozGetAsFile?a.toBlob=function(e,t,r){var n=this;setTimeout(function(){r&&a.toDataURL&&i?e(i(n.toDataURL(t,r))):e(n.mozGetAsFile("blob",t))})}:a.toDataURL&&i&&(a.toBlob=function(e,t,r){var n=this;setTimeout(function(){e(i(n.toDataURL(t,r)))})})),e.exports?e.exports=i:t.dataURLtoBlob=i}(e={exports:{}},e.exports),e.exports),o=Object.prototype.toString,t={checkOrientation:!0,maxWidth:1/0,maxHeight:1/0,minWidth:0,minHeight:0,width:void 0,height:void 0,quality:.8,mimeType:"auto",convertSize:5e6,beforeDraw:null,drew:null,success:null,error:null},r=/^image\/.+$/;function A(e){return r.test(e)}var m=String.fromCharCode;var l=window.btoa;function u(e){var t=new DataView(e),r=void 0,n=void 0,a=void 0,i=void 0;if(255===t.getUint8(0)&&216===t.getUint8(1))for(var o=t.byteLength,l=2;l<o;){if(255===t.getUint8(l)&&225===t.getUint8(l+1)){a=l;break}l+=1}if(a){var u=a+10;if("Exif"===function(e,t,r){var n="",a=void 0;for(r+=t,a=t;a<r;a+=1)n+=m(e.getUint8(a));return n}(t,a+4,4)){var c=t.getUint16(u);if(((n=18761===c)||19789===c)&&42===t.getUint16(u+2,n)){var s=t.getUint32(u+4,n);8<=s&&(i=u+s)}}}if(i){var f=t.getUint16(i,n),h=void 0,d=void 0;for(d=0;d<f;d+=1)if(h=i+12*d+2,274===t.getUint16(h,n)){h+=8,r=t.getUint16(h,n),t.setUint16(h,1,n);break}}return r}var n=/\.\d*(?:0|9){12}\d*$/i;function L(e){var t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:1e11;return n.test(e)?Math.round(e*t)/t:e}var a=function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")},i=function(){function n(e,t){for(var r=0;r<t.length;r++){var n=t[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}return function(e,t,r){return t&&n(e.prototype,t),r&&n(e,r),e}}(),c=Object.assign||function(e){for(var t=1;t<arguments.length;t++){var r=arguments[t];for(var n in r)Object.prototype.hasOwnProperty.call(r,n)&&(e[n]=r[n])}return e},s=window,f=s.ArrayBuffer,h=s.FileReader,d=window.URL||window.webkitURL,v=/\.\w+$/;return function(){function r(e,t){a(this,r),this.result=null,e&&this.compress(e,t)}return i(r,[{key:"compress",value:function(B,M){var x=this,T=new Image;return M=c({},t,M),f||(M.checkOrientation=!1),new Promise(function(r,e){if((t=B)instanceof Blob||"[object Blob]"===o.call(t)){var t,n=B.type;if(A(n))if(d||h){if(d&&!M.checkOrientation)r({url:d.createObjectURL(B)});else if(h){var a=new h,i=M.checkOrientation&&"image/jpeg"===n;a.onload=function(e){var t=e.target.result;r(i?c({url:function(e,t){var r=new Uint8Array(e),n=r.length,a="",i=void 0;for(i=0;i<n;i+=1)a+=m(r[i]);return"data:"+t+";base64,"+l(a)}(t,n)},function(e){var t=0,r=1,n=1;switch(e){case 2:r=-1;break;case 3:t=-180;break;case 4:n=-1;break;case 5:t=90,n=-1;break;case 6:t=90;break;case 7:t=90,r=-1;break;case 8:t=-90}return{rotate:t,scaleX:r,scaleY:n}}(u(t))):{url:t})},a.onabort=e,a.onerror=e,i?a.readAsArrayBuffer(B):a.readAsDataURL(B)}}else e(new Error("The current browser does not support image compression."));else e(new Error("The first argument must be an image File or Blob object."))}else e(new Error("The first argument must be a File or Blob object."))}).then(function(r){return new Promise(function(e,t){T.onload=function(){return e(c({},r,{naturalWidth:T.naturalWidth,naturalHeight:T.naturalHeight}))},T.onabort=t,T.onerror=t,T.alt=B.name,T.src=r.url})}).then(function(e){var g=e.naturalWidth,w=e.naturalHeight,t=e.rotate,p=void 0===t?0:t,r=e.scaleX,y=void 0===r?1:r,n=e.scaleY,U=void 0===n?1:n;return new Promise(function(t){var e=document.createElement("canvas"),r=e.getContext("2d"),n=g/w,a=Math.max(M.maxWidth,0)||1/0,i=Math.max(M.maxHeight,0)||1/0,o=Math.max(M.minWidth,0)||0,l=Math.max(M.minHeight,0)||0,u=g,c=w;if(a<1/0&&i<1/0?a<i*n?i=a/n:a=i*n:a<1/0?i=a/n:i<1/0&&(a=i*n),0<o&&0<l?o<l*n?l=o/n:o=l*n:0<o?l=o/n:0<l&&(o=l*n),0<M.width)c=(u=M.width)/n;else if(0<M.height){u=(c=M.height)*n}var s=-(u=Math.min(Math.max(u,o),a))/2,f=-(c=Math.min(Math.max(c,l),i))/2,h=u,d=c;if(Math.abs(p)%180==90){var m={width:c,height:u};u=m.width,c=m.height}e.width=L(u),e.height=L(c),A(M.mimeType)||(M.mimeType=B.type);var v="transparent";B.size>M.convertSize&&"image/png"===M.mimeType&&(v="#fff",M.mimeType="image/jpeg"),r.fillStyle=v,r.fillRect(0,0,u,c),r.save(),r.translate(u/2,c/2),r.rotate(p*Math.PI/180),r.scale(y,U),M.beforeDraw&&M.beforeDraw.call(x,r,e),r.drawImage(T,Math.floor(L(s)),Math.floor(L(f)),Math.floor(L(h)),Math.floor(L(d))),M.drew&&M.drew.call(x,r,e),r.restore();var b=function(e){t({naturalWidth:g,naturalHeight:w,result:e})};e.toBlob?e.toBlob(b,M.mimeType,M.quality):b(k(e.toDataURL(M.mimeType,M.quality)))})}).then(function(e){var t=e.naturalWidth,r=e.naturalHeight,n=e.result;if(d&&!M.checkOrientation&&d.revokeObjectURL(T.src),n)if(n.size>B.size&&M.mimeType===B.type&&!(M.width>t||M.height>r||M.minWidth>t||M.minHeight>r))n=B;else{var a=new Date;n.lastModified=a.getTime(),n.lastModifiedDate=a,n.name=B.name,n.name&&n.type!==B.type&&(n.name=n.name.replace(v,function(e){var t=!(1<arguments.length&&void 0!==arguments[1])||arguments[1],r=A(e)?e.substr(6):"";return"jpeg"===r&&(r="jpg"),r&&t&&(r="."+r),r}(n.type)))}else n=B;return x.result=n,M.success&&M.success.call(x,n),Promise.resolve(n)}).catch(function(e){if(!M.error)throw e;M.error.call(x,e)})}}]),r}()});
    11.