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gif.js

gif.js from https://github.com/jnordberg/gif.js

目前为 2014-07-02 提交的版本。查看 最新版本。

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.gf.qytechs.cn/scripts/2963/8459/gifjs.js 

  1. // ==UserScript==
  2. // @name        gif.js
  3. // @namespace   http://mfish.twbbs.org/
  4. // @version     0.1.6
  5. // @grant       none
  6. // ==/UserScript==
  7.  
  8. /**
  9.  * 
  10.  * I didn't create this, just modified it to allow it running in userscript.
  11.  * Auther : https://github.com/jnordberg/gif.js
  12.  *
  13.  */
  14.  
  15. var GIF_worker_URL = (function () {
  16.     var workerScript = "(function(b){function a(b,d){if({}.hasOwnProperty.call(a.cache,b))return a.cache[b];var e=a.resolve(b);if(!e)throw new Error('Failed to resolve module '+b);var c={id:b,require:a,filename:b,exports:{},loaded:!1,parent:d,children:[]};d&&d.children.push(c);var f=b.slice(0,b.lastIndexOf('/')+1);return a.cache[b]=c.exports,e.call(c.exports,c,c.exports,f,b),c.loaded=!0,a.cache[b]=c.exports}a.modules={},a.cache={},a.resolve=function(b){return{}.hasOwnProperty.call(a.modules,b)?a.modules[b]:void 0},a.define=function(b,c){a.modules[b]=c},a.define('/gif.worker.coffee',function(d,e,f,g){var b,c;b=a('/GIFEncoder.js',d),c=function(a){var c,e,d,f;return c=new b(a.width,a.height),a.index===0?c.writeHeader():c.firstFrame=!1,c.setTransparent(a.transparent),c.setRepeat(a.repeat),c.setDelay(a.delay),c.setQuality(a.quality),c.setDither(a.dither),c.setGlobalPalette(a.globalPalette),c.addFrame(a.data),a.last&&c.finish(),a.globalPalette===!0&&(a.globalPalette=c.getGlobalPalette()),d=c.stream(),a.data=d.pages,a.cursor=d.cursor,a.pageSize=d.constructor.pageSize,a.canTransfer?(f=function(c){for(var b=0,d=a.data.length;b<d;++b)e=a.data[b],c.push(e.buffer);return c}.call(this,[]),self.postMessage(a,f)):self.postMessage(a)},self.onmessage=function(a){return c(a.data)}}),a.define('/GIFEncoder.js',function(e,h,i,j){function c(){this.page=-1,this.pages=[],this.newPage()}function b(a,b){this.width=~~a,this.height=~~b,this.transparent=null,this.transIndex=0,this.repeat=-1,this.delay=0,this.image=null,this.pixels=null,this.indexedPixels=null,this.colorDepth=null,this.colorTab=null,this.usedEntry=new Array,this.palSize=7,this.dispose=-1,this.firstFrame=!0,this.sample=10,this.dither=!1,this.globalPalette=!1,this.out=new c}var f=a('/TypedNeuQuant.js',e),g=a('/LZWEncoder.js',e);c.pageSize=4096,c.charMap={};for(var d=0;d<256;d++)c.charMap[d]=String.fromCharCode(d);c.prototype.newPage=function(){this.pages[++this.page]=new Uint8Array(c.pageSize),this.cursor=0},c.prototype.getData=function(){var d='';for(var a=0;a<this.pages.length;a++)for(var b=0;b<c.pageSize;b++)d+=c.charMap[this.pages[a][b]];return d},c.prototype.writeByte=function(a){this.cursor>=c.pageSize&&this.newPage(),this.pages[this.page][this.cursor++]=a},c.prototype.writeUTFBytes=function(b){for(var c=b.length,a=0;a<c;a++)this.writeByte(b.charCodeAt(a))},c.prototype.writeBytes=function(b,d,e){for(var c=e||b.length,a=d||0;a<c;a++)this.writeByte(b[a])},b.prototype.setDelay=function(a){this.delay=Math.round(a/10)},b.prototype.setFrameRate=function(a){this.delay=Math.round(100/a)},b.prototype.setDispose=function(a){a>=0&&(this.dispose=a)},b.prototype.setRepeat=function(a){this.repeat=a},b.prototype.setTransparent=function(a){this.transparent=a},b.prototype.addFrame=function(a){this.image=a,this.colorTab=this.globalPalette.slice?this.globalPalette:null,this.getImagePixels(),this.analyzePixels(),this.globalPalette===!0&&(this.globalPalette=this.colorTab),this.firstFrame&&(this.writeLSD(),this.writePalette(),this.repeat>=0&&this.writeNetscapeExt()),this.writeGraphicCtrlExt(),this.writeImageDesc(),this.firstFrame||this.globalPalette||this.writePalette(),this.writePixels(),this.firstFrame=!1},b.prototype.finish=function(){this.out.writeByte(59)},b.prototype.setQuality=function(a){a<1&&(a=1),this.sample=a},b.prototype.setDither=function(a){a===!0&&(a='FloydSteinberg'),this.dither=a},b.prototype.setGlobalPalette=function(a){this.globalPalette=a},b.prototype.getGlobalPalette=function(){return this.globalPalette.slice&&this.globalPalette.slice(0)||this.globalPalette},b.prototype.writeHeader=function(){this.out.writeUTFBytes('GIF89a')},b.prototype.analyzePixels=function(){if(!this.colorTab){var a=new f(this.pixels,this.sample);a.buildColormap(),this.colorTab=a.getColormap()}this.dither?this.ditherPixels(this.dither.replace('-serpentine',''),this.dither.match(/-serpentine/)!==null):this.indexPixels(),this.pixels=null,this.colorDepth=8,this.palSize=7,this.transparent!==null&&(this.transIndex=this.findClosest(this.transparent,!0))},b.prototype.indexPixels=function(e){var c=this.pixels.length/3;this.indexedPixels=new Uint8Array(c);var a=0;for(var b=0;b<c;b++){var d=this.findClosestRGB(this.pixels[a++]&255,this.pixels[a++]&255,this.pixels[a++]&255);this.usedEntry[d]=!0,this.indexedPixels[b]=d}},b.prototype.ditherPixels=function(l,A){var o={FalseFloydSteinberg:[[.375,1,0],[.375,0,1],[.25,1,1]],FloydSteinberg:[[.4375,1,0],[.1875,-1,1],[.3125,0,1],[.0625,1,1]],Stucki:[[.19047619047619047,1,0],[.09523809523809523,2,0],[.047619047619047616,-2,1],[.09523809523809523,-1,1],[.19047619047619047,0,1],[.09523809523809523,1,1],[.047619047619047616,2,1],[.023809523809523808,-2,2],[.047619047619047616,-1,2],[.09523809523809523,0,2],[.047619047619047616,1,2],[.023809523809523808,2,2]],Atkinson:[[.125,1,0],[.125,2,0],[.125,-1,1],[.125,0,1],[.125,1,1],[.125,0,2]]};if(!(l&&o[l]))throw'Unknown dithering kernel: '+l;var f=o[l],i=0,r=this.height,e=this.width,b=this.pixels,c=A?-1:1;this.indexedPixels=new Uint8Array(this.pixels.length/3);for(var h=0;h<r;h++){A&&(c*=-1);for(var g=c==1?0:e-1,z=c==1?e:0;g!==z;g+=c){i=h*e+g;var a=i*3,n=b[a],p=b[a+1],q=b[a+2];a=this.findClosestRGB(n,p,q),this.usedEntry[a]=!0,this.indexedPixels[i]=a,a*=3;var x=this.colorTab[a],s=this.colorTab[a+1],t=this.colorTab[a+2],u=n-x,v=p-s,w=q-t;for(var d=c==1?0:f.length-1,y=c==1?f.length:0;d!==y;d+=c){var k=f[d][1],j=f[d][2];if(k+g>=0&&k+g<e&&j+h>=0&&j+h<r){var m=f[d][0];a=i+k+j*e,a*=3,b[a]=Math.max(0,Math.min(255,b[a]+u*m)),b[a+1]=Math.max(0,Math.min(255,b[a+1]+v*m)),b[a+2]=Math.max(0,Math.min(255,b[a+2]+w*m))}}}}},b.prototype.findClosest=function(a,b){return this.findClosestRGB((a&16711680)>>16,(a&65280)>>8,a&255,b)},b.prototype.findClosestRGB=function(j,l,k,n){if(this.colorTab===null)return-1;var m=k|l<<8|j<<16,g=0,b=16777216,i=this.colorTab.length;for(var a=0;a<i;){var f=j-(this.colorTab[a++]&255),e=l-(this.colorTab[a++]&255),d=k-(this.colorTab[a]&255),c=f*f+e*e+d*d,h=parseInt(a/3);(!n||this.usedEntry[h])&&c<b&&(b=c,g=h),a++}return g},b.prototype.getImagePixels=function(){var a=this.width,g=this.height;this.pixels=new Uint8Array(a*g*3);var b=this.image,c=0;for(var d=0;d<g;d++)for(var e=0;e<a;e++){var f=d*a*4+e*4;this.pixels[c++]=b[f],this.pixels[c++]=b[f+1],this.pixels[c++]=b[f+2]}},b.prototype.writeGraphicCtrlExt=function(){this.out.writeByte(33),this.out.writeByte(249),this.out.writeByte(4);var b,a;this.transparent===null?(b=0,a=0):(b=1,a=2),this.dispose>=0&&(a=dispose&7),a<<=2,this.out.writeByte(0|a|0|b),this.writeShort(this.delay),this.out.writeByte(this.transIndex),this.out.writeByte(0)},b.prototype.writeImageDesc=function(){this.out.writeByte(44),this.writeShort(0),this.writeShort(0),this.writeShort(this.width),this.writeShort(this.height),this.firstFrame||this.globalPalette?this.out.writeByte(0):this.out.writeByte(128|this.palSize)},b.prototype.writeLSD=function(){this.writeShort(this.width),this.writeShort(this.height),this.out.writeByte(240|this.palSize),this.out.writeByte(0),this.out.writeByte(0)},b.prototype.writeNetscapeExt=function(){this.out.writeByte(33),this.out.writeByte(255),this.out.writeByte(11),this.out.writeUTFBytes('NETSCAPE2.0'),this.out.writeByte(3),this.out.writeByte(1),this.writeShort(this.repeat),this.out.writeByte(0)},b.prototype.writePalette=function(){this.out.writeBytes(this.colorTab);var b=768-this.colorTab.length;for(var a=0;a<b;a++)this.out.writeByte(0)},b.prototype.writeShort=function(a){this.out.writeByte(a&255),this.out.writeByte(a>>8&255)},b.prototype.writePixels=function(){var a=new g(this.width,this.height,this.indexedPixels,this.colorDepth);a.encode(this.out)},b.prototype.stream=function(){return this.out},e.exports=b}),a.define('/LZWEncoder.js',function(e,g,h,i){function f(y,D,C,B){function w(a,b){r[f++]=a,f>=254&&t(b)}function x(b){u(a),k=i+2,j=!0,l(i,b)}function u(b){for(var a=0;a<b;++a)h[a]=-1}function A(z,r){var g,t,d,e,y,w,s;for(q=z,j=!1,n_bits=q,m=p(n_bits),i=1<<z-1,o=i+1,k=i+2,f=0,e=v(),s=0,g=a;g<65536;g*=2)++s;s=8-s,w=a,u(w),l(i,r);a:while((t=v())!=c){if(g=(t<<b)+e,d=t<<s^e,h[d]===g){e=n[d];continue}if(h[d]>=0){y=w-d,d===0&&(y=1);do if((d-=y)<0&&(d+=w),h[d]===g){e=n[d];continue a}while(h[d]>=0)}l(e,r),e=t,k<1<<b?(n[d]=k++,h[d]=g):x(r)}l(e,r),l(o,r)}function z(a){a.writeByte(s),remaining=y*D,curPixel=0,A(s+1,a),a.writeByte(0)}function t(a){f>0&&(a.writeByte(f),a.writeBytes(r,0,f),f=0)}function p(a){return(1<<a)-1}function v(){if(remaining===0)return c;--remaining;var a=C[curPixel++];return a&255}function l(a,c){g&=d[e],e>0?g|=a<<e:g=a,e+=n_bits;while(e>=8)w(g&255,c),g>>=8,e-=8;if((k>m||j)&&(j?(m=p(n_bits=q),j=!1):(++n_bits,n_bits==b?m=1<<b:m=p(n_bits))),a==o){while(e>0)w(g&255,c),g>>=8,e-=8;t(c)}}var s=Math.max(2,B),r=new Uint8Array(256),h=new Int32Array(a),n=new Int32Array(a),g,e=0,f,k=0,m,j=!1,q,i,o;this.encode=z}var c=-1,b=12,a=5003,d=[0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535];e.exports=f}),a.define('/TypedNeuQuant.js',function(A,F,E,D){function C(A,B){function I(){o=[],q=new Int32Array(256),t=new Int32Array(a),y=new Int32Array(a),z=new Int32Array(a>>3);var c,d;for(c=0;c<a;c++)d=(c<<b+8)/a,o[c]=new Float64Array([d,d,d,0]),y[c]=e/a,t[c]=0}function J(){for(var c=0;c<a;c++)o[c][0]>>=b,o[c][1]>>=b,o[c][2]>>=b,o[c][3]=c}function K(b,a,c,e,f){o[a][0]-=b*(o[a][0]-c)/d,o[a][1]-=b*(o[a][1]-e)/d,o[a][2]-=b*(o[a][2]-f)/d}function L(j,e,n,l,k){var h=Math.abs(e-j),i=Math.min(e+j,a),g=e+1,f=e-1,m=1,b,d;while(g<i||f>h)d=z[m++],g<i&&(b=o[g++],b[0]-=d*(b[0]-n)/c,b[1]-=d*(b[1]-l)/c,b[2]-=d*(b[2]-k)/c),f>h&&(b=o[f--],b[0]-=d*(b[0]-n)/c,b[1]-=d*(b[1]-l)/c,b[2]-=d*(b[2]-k)/c)}function C(p,s,q){var h=2147483647,k=h,d=-1,m=d,c,j,e,n,l;for(c=0;c<a;c++)j=o[c],e=Math.abs(j[0]-p)+Math.abs(j[1]-s)+Math.abs(j[2]-q),e<h&&(h=e,d=c),n=e-(t[c]>>i-b),n<k&&(k=n,m=c),l=y[c]>>g,y[c]-=l,t[c]+=l<<f;return y[d]+=x,t[d]-=r,m}function D(){var d,b,e,c,h,g,f=0,i=0;for(d=0;d<a;d++){for(e=o[d],h=d,g=e[1],b=d+1;b<a;b++)c=o[b],c[1]<g&&(h=b,g=c[1]);if(c=o[h],d!=h&&(b=c[0],c[0]=e[0],e[0]=b,b=c[1],c[1]=e[1],e[1]=b,b=c[2],c[2]=e[2],e[2]=b,b=c[3],c[3]=e[3],e[3]=b),g!=f){for(q[f]=i+d>>1,b=f+1;b<g;b++)q[b]=d;f=g,i=d}}for(q[f]=i+n>>1,b=f+1;b<256;b++)q[b]=n}function E(j,i,k){var b,d,c,e=1e3,h=-1,f=q[i],g=f-1;while(f<a||g>=0)f<a&&(d=o[f],c=d[1]-i,c>=e?f=a:(f++,c<0&&(c=-c),b=d[0]-j,b<0&&(b=-b),c+=b,c<e&&(b=d[2]-k,b<0&&(b=-b),c+=b,c<e&&(e=c,h=d[3])))),g>=0&&(d=o[g],c=i-d[1],c>=e?g=-1:(g--,c<0&&(c=-c),b=d[0]-j,b<0&&(b=-b),c+=b,c<e&&(b=d[2]-k,b<0&&(b=-b),c+=b,c<e&&(e=c,h=d[3]))));return h}function F(){var c,f=A.length,D=30+(B-1)/3,y=f/(3*B),q=~~(y/w),n=d,o=u,a=o>>h;for(a<=1&&(a=0),c=0;c<a;c++)z[c]=n*((a*a-c*c)*m/(a*a));var i;f<s?(B=1,i=3):f%l!==0?i=3*l:f%k!==0?i=3*k:f%p!==0?i=3*p:i=3*j;var r,t,x,e,g=0;c=0;while(c<y)if(r=(A[g]&255)<<b,t=(A[g+1]&255)<<b,x=(A[g+2]&255)<<b,e=C(r,t,x),K(n,e,r,t,x),a!==0&&L(a,e,r,t,x),g+=i,g>=f&&(g-=f),c++,q===0&&(q=1),c%q===0)for(n-=n/D,o-=o/v,a=o>>h,a<=1&&(a=0),e=0;e<a;e++)z[e]=n*((a*a-e*e)*m/(a*a))}function G(){I(),F(),J(),D()}function H(){var b=[],g=[];for(var c=0;c<a;c++)g[o[c][3]]=c;var d=0;for(var e=0;e<a;e++){var f=g[e];b[d++]=o[f][0],b[d++]=o[f][1],b[d++]=o[f][2]}return b}var o,q,t,y,z;this.buildColormap=G,this.getColormap=H,this.lookupRGB=E}var w=100,a=256,n=a-1,b=4,i=16,e=1<<i,f=10,B=1<<f,g=10,x=e>>g,r=e<<f-g,z=a>>3,h=6,t=1<<h,u=z*t,v=30,o=10,d=1<<o,q=8,m=1<<q,y=o+q,c=1<<y,l=499,k=491,p=487,j=503,s=3*j;A.exports=C}),a('/gif.worker.coffee')}.call(this,this))";
  17.     function getUrl (blob) {
  18.         return URL.createObjectURL(blob);
  19.     }
  20.     function createBlob (text, MIME) {
  21.         var aFileParts = [text];
  22.         var oMyBlob = new Blob(aFileParts, {type : MIME});
  23.         return oMyBlob;
  24.     }
  25.     var workerURL = getUrl(createBlob(workerScript, 'application/x-javascript'));
  26.     return workerURL;
  27. }());
  28. // Generated by CommonJS Everywhere 0.9.7
  29. (function (global) {
  30.   function require(file, parentModule) {
  31.     if ({}.hasOwnProperty.call(require.cache, file))
  32.       return require.cache[file];
  33.     var resolved = require.resolve(file);
  34.     if (!resolved)
  35.       throw new Error('Failed to resolve module ' + file);
  36.     var module$ = {
  37.         id: file,
  38.         require: require,
  39.         filename: file,
  40.         exports: {},
  41.         loaded: false,
  42.         parent: parentModule,
  43.         children: []
  44.       };
  45.     if (parentModule)
  46.       parentModule.children.push(module$);
  47.     var dirname = file.slice(0, file.lastIndexOf('/') + 1);
  48.     require.cache[file] = module$.exports;
  49.     resolved.call(module$.exports, module$, module$.exports, dirname, file);
  50.     module$.loaded = true;
  51.     return require.cache[file] = module$.exports;
  52.   }
  53.   require.modules = {};
  54.   require.cache = {};
  55.   require.resolve = function (file) {
  56.     return {}.hasOwnProperty.call(require.modules, file) ? require.modules[file] : void 0;
  57.   };
  58.   require.define = function (file, fn) {
  59.     require.modules[file] = fn;
  60.   };
  61.   var process = function () {
  62.       var cwd = '/';
  63.       return {
  64.         title: 'browser',
  65.         version: 'v0.10.26',
  66.         browser: true,
  67.         env: {},
  68.         argv: [],
  69.         nextTick: global.setImmediate || function (fn) {
  70.           setTimeout(fn, 0);
  71.         },
  72.         cwd: function () {
  73.           return cwd;
  74.         },
  75.         chdir: function (dir) {
  76.           cwd = dir;
  77.         }
  78.       };
  79.     }();
  80.   require.define('/gif.coffee', function (module, exports, __dirname, __filename) {
  81.     var browser, defaults, EventEmitter, frameDefaults, GIF;
  82.     EventEmitter = require('events', module).EventEmitter;
  83.     browser = require('/browser.coffee', module);
  84.     GIF = function (super$) {
  85.       extends$(GIF, super$);
  86.       defaults = {
  87.         workerScript: 'gif.worker.js',
  88.         workers: 2,
  89.         repeat: 0,
  90.         background: '#fff',
  91.         quality: 10,
  92.         width: null,
  93.         height: null,
  94.         transparent: null
  95.       };
  96.       frameDefaults = {
  97.         delay: 500,
  98.         copy: false
  99.       };
  100.       function GIF(options) {
  101.         var key, value;
  102.         this.running = false;
  103.         this.options = {};
  104.         this.frames = [];
  105.         this.freeWorkers = [];
  106.         this.activeWorkers = [];
  107.         this.setOptions(options);
  108.         for (key in defaults) {
  109.           value = defaults[key];
  110.           if (null != this.options[key])
  111.             this.options[key];
  112.           else
  113.             this.options[key] = value;
  114.         }
  115.       }
  116.       GIF.prototype.setOption = function (key, value) {
  117.         this.options[key] = value;
  118.         if (null != this._canvas && (key === 'width' || key === 'height'))
  119.           return this._canvas[key] = value;
  120.       };
  121.       GIF.prototype.setOptions = function (options) {
  122.         var key, value;
  123.         return function (accum$) {
  124.           for (key in options) {
  125.             if (!isOwn$(options, key))
  126.               continue;
  127.             value = options[key];
  128.             accum$.push(this.setOption(key, value));
  129.           }
  130.           return accum$;
  131.         }.call(this, []);
  132.       };
  133.       GIF.prototype.addFrame = function (image, options) {
  134.         var frame, key;
  135.         if (null == options)
  136.           options = {};
  137.         frame = {};
  138.         frame.transparent = this.options.transparent;
  139.         for (key in frameDefaults) {
  140.           frame[key] = options[key] || frameDefaults[key];
  141.         }
  142.         if (!(null != this.options.width))
  143.           this.setOption('width', image.width);
  144.         if (!(null != this.options.height))
  145.           this.setOption('height', image.height);
  146.         if ('undefined' !== typeof ImageData && null != ImageData && image instanceof ImageData) {
  147.           frame.data = image.data;
  148.         } else if ('undefined' !== typeof CanvasRenderingContext2D && null != CanvasRenderingContext2D && image instanceof CanvasRenderingContext2D || 'undefined' !== typeof WebGLRenderingContext && null != WebGLRenderingContext && image instanceof WebGLRenderingContext) {
  149.           if (options.copy) {
  150.             frame.data = this.getContextData(image);
  151.           } else {
  152.             frame.context = image;
  153.           }
  154.         } else if (null != image.childNodes) {
  155.           if (options.copy) {
  156.             frame.data = this.getImageData(image);
  157.           } else {
  158.             frame.image = image;
  159.           }
  160.         } else {
  161.           throw new Error('Invalid image');
  162.         }
  163.         return this.frames.push(frame);
  164.       };
  165.       GIF.prototype.render = function () {
  166.         var i, numWorkers;
  167.         if (this.running)
  168.           throw new Error('Already running');
  169.         if (!(null != this.options.width) || !(null != this.options.height))
  170.           throw new Error('Width and height must be set prior to rendering');
  171.         this.running = true;
  172.         this.nextFrame = 0;
  173.         this.finishedFrames = 0;
  174.         this.imageParts = function (accum$) {
  175.           for (var cache$ = function () {
  176.                 var accum$1;
  177.                 accum$1 = [];
  178.                 for (var i$ = 0; 0 <= this.frames.length ? i$ < this.frames.length : i$ > this.frames.length; 0 <= this.frames.length ? ++i$ : --i$)
  179.                   accum$1.push(i$);
  180.                 return accum$1;
  181.               }.apply(this, arguments), i$ = 0, length$ = cache$.length; i$ < length$; ++i$) {
  182.             i = cache$[i$];
  183.             accum$.push(null);
  184.           }
  185.           return accum$;
  186.         }.call(this, []);
  187.         numWorkers = this.spawnWorkers();
  188.         if (this.options.globalPalette === true) {
  189.           this.renderNextFrame();
  190.         } else {
  191.           for (var cache$1 = function () {
  192.                 var accum$1;
  193.                 accum$1 = [];
  194.                 for (var i$1 = 0; 0 <= numWorkers ? i$1 < numWorkers : i$1 > numWorkers; 0 <= numWorkers ? ++i$1 : --i$1)
  195.                   accum$1.push(i$1);
  196.                 return accum$1;
  197.               }.apply(this, arguments), i$1 = 0, length$1 = cache$1.length; i$1 < length$1; ++i$1) {
  198.             i = cache$1[i$1];
  199.             this.renderNextFrame();
  200.           }
  201.         }
  202.         this.emit('start');
  203.         return this.emit('progress', 0);
  204.       };
  205.       GIF.prototype.abort = function () {
  206.         var worker;
  207.         while (true) {
  208.           worker = this.activeWorkers.shift();
  209.           if (!(null != worker))
  210.             break;
  211.           console.log('killing active worker');
  212.           worker.terminate();
  213.         }
  214.         this.running = false;
  215.         return this.emit('abort');
  216.       };
  217.       GIF.prototype.spawnWorkers = function () {
  218.         var numWorkers;
  219.         numWorkers = Math.min(this.options.workers, this.frames.length);
  220.         (function () {
  221.           var accum$;
  222.           accum$ = [];
  223.           for (var i$ = this.freeWorkers.length; this.freeWorkers.length <= numWorkers ? i$ < numWorkers : i$ > numWorkers; this.freeWorkers.length <= numWorkers ? ++i$ : --i$)
  224.             accum$.push(i$);
  225.           return accum$;
  226.         }.apply(this, arguments).forEach(function (this$) {
  227.           return function (i) {
  228.             var worker;
  229.             console.log('spawning worker ' + i);
  230.             worker = new Worker(this$.options.workerScript);
  231.             worker.onmessage = function (this$1) {
  232.               return function (event) {
  233.                 this$1.activeWorkers.splice(this$1.activeWorkers.indexOf(worker), 1);
  234.                 this$1.freeWorkers.push(worker);
  235.                 return this$1.frameFinished(event.data);
  236.               };
  237.             }(this$);
  238.             return this$.freeWorkers.push(worker);
  239.           };
  240.         }(this)));
  241.         return numWorkers;
  242.       };
  243.       GIF.prototype.frameFinished = function (frame) {
  244.         var i;
  245.         console.log('frame ' + frame.index + ' finished - ' + this.activeWorkers.length + ' active');
  246.         this.finishedFrames++;
  247.         this.emit('progress', this.finishedFrames / this.frames.length);
  248.         this.imageParts[frame.index] = frame;
  249.         if (this.options.globalPalette === true) {
  250.           this.options.globalPalette = frame.globalPalette;
  251.           console.log('global palette analyzed');
  252.           if (this.frames.length > 2)
  253.             for (var cache$ = function () {
  254.                   var accum$;
  255.                   accum$ = [];
  256.                   for (var i$ = 1; 1 <= this.freeWorkers.length ? i$ < this.freeWorkers.length : i$ > this.freeWorkers.length; 1 <= this.freeWorkers.length ? ++i$ : --i$)
  257.                     accum$.push(i$);
  258.                   return accum$;
  259.                 }.apply(this, arguments), i$ = 0, length$ = cache$.length; i$ < length$; ++i$) {
  260.               i = cache$[i$];
  261.               this.renderNextFrame();
  262.             }
  263.         }
  264.         if (in$(null, this.imageParts)) {
  265.           return this.renderNextFrame();
  266.         } else {
  267.           return this.finishRendering();
  268.         }
  269.       };
  270.       GIF.prototype.finishRendering = function () {
  271.         var data, frame, i, image, len, offset, page;
  272.         len = 0;
  273.         for (var i$ = 0, length$ = this.imageParts.length; i$ < length$; ++i$) {
  274.           frame = this.imageParts[i$];
  275.           len += (frame.data.length - 1) * frame.pageSize + frame.cursor;
  276.         }
  277.         len += frame.pageSize - frame.cursor;
  278.         console.log('rendering finished - filesize ' + Math.round(len / 1e3) + 'kb');
  279.         data = new Uint8Array(len);
  280.         offset = 0;
  281.         for (var i$1 = 0, length$1 = this.imageParts.length; i$1 < length$1; ++i$1) {
  282.           frame = this.imageParts[i$1];
  283.           for (var i$2 = 0, length$2 = frame.data.length; i$2 < length$2; ++i$2) {
  284.             page = frame.data[i$2];
  285.             i = i$2;
  286.             data.set(page, offset);
  287.             if (i === frame.data.length - 1) {
  288.               offset += frame.cursor;
  289.             } else {
  290.               offset += frame.pageSize;
  291.             }
  292.           }
  293.         }
  294.         image = new Blob([data], { type: 'image/gif' });
  295.         return this.emit('finished', image, data);
  296.       };
  297.       GIF.prototype.renderNextFrame = function () {
  298.         var frame, task, worker;
  299.         if (this.freeWorkers.length === 0)
  300.           throw new Error('No free workers');
  301.         if (this.nextFrame >= this.frames.length)
  302.           return;
  303.         frame = this.frames[this.nextFrame++];
  304.         worker = this.freeWorkers.shift();
  305.         task = this.getTask(frame);
  306.         console.log('starting frame ' + (task.index + 1) + ' of ' + this.frames.length);
  307.         this.activeWorkers.push(worker);
  308.         return worker.postMessage(task);
  309.       };
  310.       GIF.prototype.getContextData = function (ctx) {
  311.         return ctx.getImageData(0, 0, this.options.width, this.options.height).data;
  312.       };
  313.       GIF.prototype.getImageData = function (image) {
  314.         var ctx;
  315.         if (!(null != this._canvas)) {
  316.           this._canvas = document.createElement('canvas');
  317.           this._canvas.width = this.options.width;
  318.           this._canvas.height = this.options.height;
  319.         }
  320.         ctx = this._canvas.getContext('2d');
  321.         ctx.setFill = this.options.background;
  322.         ctx.fillRect(0, 0, this.options.width, this.options.height);
  323.         ctx.drawImage(image, 0, 0);
  324.         return this.getContextData(ctx);
  325.       };
  326.       GIF.prototype.getTask = function (frame) {
  327.         var index, task;
  328.         index = this.frames.indexOf(frame);
  329.         task = {
  330.           index: index,
  331.           last: index === this.frames.length - 1,
  332.           delay: frame.delay,
  333.           transparent: frame.transparent,
  334.           width: this.options.width,
  335.           height: this.options.height,
  336.           quality: this.options.quality,
  337.           dither: this.options.dither,
  338.           globalPalette: this.options.globalPalette,
  339.           repeat: this.options.repeat,
  340.           canTransfer: browser.name === 'chrome'
  341.         };
  342.         if (null != frame.data) {
  343.           task.data = frame.data;
  344.         } else if (null != frame.context) {
  345.           task.data = this.getContextData(frame.context);
  346.         } else if (null != frame.image) {
  347.           task.data = this.getImageData(frame.image);
  348.         } else {
  349.           throw new Error('Invalid frame');
  350.         }
  351.         return task;
  352.       };
  353.       return GIF;
  354.     }(EventEmitter);
  355.     module.exports = GIF;
  356.     function isOwn$(o, p) {
  357.       return {}.hasOwnProperty.call(o, p);
  358.     }
  359.     function in$(member, list) {
  360.       for (var i = 0, length = list.length; i < length; ++i)
  361.         if (i in list && list[i] === member)
  362.           return true;
  363.       return false;
  364.     }
  365.     function extends$(child, parent) {
  366.       for (var key in parent)
  367.         if (isOwn$(parent, key))
  368.           child[key] = parent[key];
  369.       function ctor() {
  370.         this.constructor = child;
  371.       }
  372.       ctor.prototype = parent.prototype;
  373.       child.prototype = new ctor;
  374.       child.__super__ = parent.prototype;
  375.       return child;
  376.     }
  377.   });
  378.   require.define('/browser.coffee', function (module, exports, __dirname, __filename) {
  379.     var browser, mode, platform, ua, UA;
  380.     ua = navigator.userAgent.toLowerCase();
  381.     platform = navigator.platform.toLowerCase();
  382.     UA = ua.match(/(opera|ie|firefox|chrome|version)[\s\/:]([\w\d\.]+)?.*?(safari|version[\s\/:]([\w\d\.]+)|$)/) || [
  383.       null,
  384.       'unknown',
  385.       0
  386.     ];
  387.     mode = UA[1] === 'ie' && document.documentMode;
  388.     browser = {
  389.       name: UA[1] === 'version' ? UA[3] : UA[1],
  390.       version: mode || parseFloat(UA[1] === 'opera' && UA[4] ? UA[4] : UA[2]),
  391.       platform: { name: ua.match(/ip(?:ad|od|hone)/) ? 'ios' : (ua.match(/(?:webos|android)/) || platform.match(/mac|win|linux/) || ['other'])[0] }
  392.     };
  393.     browser[browser.name] = true;
  394.     browser[browser.name + parseInt(browser.version, 10)] = true;
  395.     browser.platform[browser.platform.name] = true;
  396.     module.exports = browser;
  397.     function isOwn$(o, p) {
  398.       return {}.hasOwnProperty.call(o, p);
  399.     }
  400.     function in$(member, list) {
  401.       for (var i = 0, length = list.length; i < length; ++i)
  402.         if (i in list && list[i] === member)
  403.           return true;
  404.       return false;
  405.     }
  406.     function extends$(child, parent) {
  407.       for (var key in parent)
  408.         if (isOwn$(parent, key))
  409.           child[key] = parent[key];
  410.       function ctor() {
  411.         this.constructor = child;
  412.       }
  413.       ctor.prototype = parent.prototype;
  414.       child.prototype = new ctor;
  415.       child.__super__ = parent.prototype;
  416.       return child;
  417.     }
  418.   });
  419.   require.define('events', function (module, exports, __dirname, __filename) {
  420.     if (!process.EventEmitter)
  421.       process.EventEmitter = function () {
  422.       };
  423.     var EventEmitter = exports.EventEmitter = process.EventEmitter;
  424.     var isArray = typeof Array.isArray === 'function' ? Array.isArray : function (xs) {
  425.         return Object.prototype.toString.call(xs) === '[object Array]';
  426.       };
  427.     var defaultMaxListeners = 10;
  428.     EventEmitter.prototype.setMaxListeners = function (n) {
  429.       if (!this._events)
  430.         this._events = {};
  431.       this._events.maxListeners = n;
  432.     };
  433.     EventEmitter.prototype.emit = function (type) {
  434.       if (type === 'error') {
  435.         if (!this._events || !this._events.error || isArray(this._events.error) && !this._events.error.length) {
  436.           if (arguments[1] instanceof Error) {
  437.             throw arguments[1];
  438.           } else {
  439.             throw new Error("Uncaught, unspecified 'error' event.");
  440.           }
  441.           return false;
  442.         }
  443.       }
  444.       if (!this._events)
  445.         return false;
  446.       var handler = this._events[type];
  447.       if (!handler)
  448.         return false;
  449.       if (typeof handler == 'function') {
  450.         switch (arguments.length) {
  451.         case 1:
  452.           handler.call(this);
  453.           break;
  454.         case 2:
  455.           handler.call(this, arguments[1]);
  456.           break;
  457.         case 3:
  458.           handler.call(this, arguments[1], arguments[2]);
  459.           break;
  460.         default:
  461.           var args = Array.prototype.slice.call(arguments, 1);
  462.           handler.apply(this, args);
  463.         }
  464.         return true;
  465.       } else if (isArray(handler)) {
  466.         var args = Array.prototype.slice.call(arguments, 1);
  467.         var listeners = handler.slice();
  468.         for (var i = 0, l = listeners.length; i < l; i++) {
  469.           listeners[i].apply(this, args);
  470.         }
  471.         return true;
  472.       } else {
  473.         return false;
  474.       }
  475.     };
  476.     EventEmitter.prototype.addListener = function (type, listener) {
  477.       if ('function' !== typeof listener) {
  478.         throw new Error('addListener only takes instances of Function');
  479.       }
  480.       if (!this._events)
  481.         this._events = {};
  482.       this.emit('newListener', type, listener);
  483.       if (!this._events[type]) {
  484.         this._events[type] = listener;
  485.       } else if (isArray(this._events[type])) {
  486.         if (!this._events[type].warned) {
  487.           var m;
  488.           if (this._events.maxListeners !== undefined) {
  489.             m = this._events.maxListeners;
  490.           } else {
  491.             m = defaultMaxListeners;
  492.           }
  493.           if (m && m > 0 && this._events[type].length > m) {
  494.             this._events[type].warned = true;
  495.             console.error('(node) warning: possible EventEmitter memory ' + 'leak detected. %d listeners added. ' + 'Use emitter.setMaxListeners() to increase limit.', this._events[type].length);
  496.             console.trace();
  497.           }
  498.         }
  499.         this._events[type].push(listener);
  500.       } else {
  501.         this._events[type] = [
  502.           this._events[type],
  503.           listener
  504.         ];
  505.       }
  506.       return this;
  507.     };
  508.     EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  509.     EventEmitter.prototype.once = function (type, listener) {
  510.       var self = this;
  511.       self.on(type, function g() {
  512.         self.removeListener(type, g);
  513.         listener.apply(this, arguments);
  514.       });
  515.       return this;
  516.     };
  517.     EventEmitter.prototype.removeListener = function (type, listener) {
  518.       if ('function' !== typeof listener) {
  519.         throw new Error('removeListener only takes instances of Function');
  520.       }
  521.       if (!this._events || !this._events[type])
  522.         return this;
  523.       var list = this._events[type];
  524.       if (isArray(list)) {
  525.         var i = list.indexOf(listener);
  526.         if (i < 0)
  527.           return this;
  528.         list.splice(i, 1);
  529.         if (list.length == 0)
  530.           delete this._events[type];
  531.       } else if (this._events[type] === listener) {
  532.         delete this._events[type];
  533.       }
  534.       return this;
  535.     };
  536.     EventEmitter.prototype.removeAllListeners = function (type) {
  537.       if (type && this._events && this._events[type])
  538.         this._events[type] = null;
  539.       return this;
  540.     };
  541.     EventEmitter.prototype.listeners = function (type) {
  542.       if (!this._events)
  543.         this._events = {};
  544.       if (!this._events[type])
  545.         this._events[type] = [];
  546.       if (!isArray(this._events[type])) {
  547.         this._events[type] = [this._events[type]];
  548.       }
  549.       return this._events[type];
  550.     };
  551.   });
  552.   global.GIF = require('/gif.coffee');
  553. }.call(this, this));
  554. //# sourceMappingURL=gif.js.map 
  555. // gif.js 0.1.6 - https://github.com/jnordberg/gif.js

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