3 lines
16 KiB
JavaScript
3 lines
16 KiB
JavaScript
|
// gif.worker.js 0.2.0 - https://github.com/jnordberg/gif.js
|
||
|
|
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){var NeuQuant=require("./TypedNeuQuant.js");var LZWEncoder=require("./LZWEncoder.js");function ByteArray(){this.page=-1;this.pages=[];this.newPage()}ByteArray.pageSize=4096;ByteArray.charMap={};for(var i=0;i<256;i++)ByteArray.charMap[i]=String.fromCharCode(i);ByteArray.prototype.newPage=function(){this.pages[++this.page]=new Uint8Array(ByteArray.pageSize);this.cursor=0};ByteArray.prototype.getData=function(){var rv="";for(var p=0;p<this.pages.length;p++){for(var i=0;i<ByteArray.pageSize;i++){rv+=ByteArray.charMap[this.pages[p][i]]}}return rv};ByteArray.prototype.writeByte=function(val){if(this.cursor>=ByteArray.pageSize)this.newPage();this.pages[this.page][this.cursor++]=val};ByteArray.prototype.writeUTFBytes=function(string){for(var l=string.length,i=0;i<l;i++)this.writeByte(string.charCodeAt(i))};ByteArray.prototype.writeBytes=function(array,offset,length){for(var l=length||array.length,i=offset||0;i<l;i++)this.writeByte(array[i])};function GIFEncoder(width,height){this.width=~~width;this.height=~~height;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.neuQuant=null;this.usedEntry=new Array;this.palSize=7;this.dispose=-1;this.firstFrame=true;this.sample=10;this.dither=false;this.globalPalette=false;this.out=new ByteArray}GIFEncoder.prototype.setDelay=function(milliseconds){this.delay=Math.round(milliseconds/10)};GIFEncoder.prototype.setFrameRate=function(fps){this.delay=Math.round(100/fps)};GIFEncoder.prototype.setDispose=function(disposalCode){if(disposalCode>=0)this.dispose=disposalCode};GIFEncoder.prototype.setRepeat=function(repeat){this.repeat=repeat};GIFEncoder.prototype.setTransparent=function(color){this.transparent=color};GIFEncoder.prototype.addFrame=function(imageData){this.image=imageData;this.colorTab=this.globalPalette&&this.globalPalette.slice?this.globalPalette:null;this.getImagePixels();this.analyzePixels();if(this.globalPalette===true)this.globalPalette=this.colorTab;if(this.firstFrame){this.writeLSD();this.writePalette();if(this.repeat>=0){this.writeNetscapeExt()}}this.writeGraphicCtrlExt();this.writeImageDesc();if(!this.firstFrame&&!this.globalPalette)this.writePalette();this.writePixels();this.firstFrame=false};GIFEncoder.prototype.finish=function(){this.out.writeByte(59)};GIFEncoder.prototype.setQuality=function(quality){if(quality<1)quality=1;this.sample=quality};GIFEncoder.prototype.setDither=function(dither){if(dither===true)dither="FloydSteinberg";this.dither=dither};GIFEncoder.prototype.setGlobalPalette=function(palette){this.globalPalette=palette};GIFEncoder.prototype.getGlobalPalette=function(){return this.globalPalette&&this.globalPalette.slice&&this.globalPalette.slice(0)||this.globalPalette};GIFEncoder.prototype.writeHeader=function(){this.out.writeUTFBytes("GIF89a")};GIFEncoder.prototype.analyzePixels=function(){if(!this.colorTab){this.neuQuant=new NeuQuant(this.pixels,this.sample);this.neuQuant.buildColormap();this.colorTab=this.neuQuant.getColormap()}if(this.dither){this.ditherPixels(this.dither.replace("-serpentine",""),this.dither.match(/-serpentine/)!==null)}else{this.indexPixels()}this.pixels=null;this.colorDepth=8;this.palSize=7;if(this.transparent!==null){this.transIndex=this.findClosest(this.transparent,true)}};GIFEncoder.prototype.indexPixels=function(imgq){var nPix=this.pixels.length/3;this.indexedPixels=new Uint8Array(nPix);var k=0;for(var j=0;j<nPix;j++){var index=this.findClosestRGB(this.pixels[k++]&255,this.pixels[k++]&255,this.pixels[k++]&255);this.usedEntry[index]=true;this.indexe
|