quaggaJS/dist/quagga.min.js

/*! quagga 2015-09-14 */
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 * Available via the MIT or new BSD license.
 * see: http://github.com/jrburke/almond for details
 */
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o.dom.pattern||(o.dom.pattern=document.createElement("canvas"),o.dom.pattern.className="patternBuffer",a&&a.appendChild(o.dom.pattern)),o.ctx.pattern=o.dom.pattern.getContext("2d"),o.dom.overlay=document.querySelector("canvas.drawingBuffer"),o.dom.overlay&&(o.ctx.overlay=o.dom.overlay.getContext("2d"))}}function f(){c.readers.forEach(function(a){var b,c={};"object"==typeof a?(b=a.format,c=a.config):"string"==typeof a&&(b=a),p.push(new l[b](c))}),console.log("Registered Readers: "+p.map(function(a){return JSON.stringify({format:a.FORMAT,config:a.config})}).join(", "))}function g(){if("undefined"!=typeof document){var a,b=[{node:o.dom.frequency,prop:c.showFrequency},{node:o.dom.pattern,prop:c.showPattern}];for(a=0;a<b.length;a++)b[a].prop===!0?b[a].node.style.display="block":b[a].node.style.display="none"}}function h(a,b,c){function e(c){var d={y:c*Math.sin(b),x:c*Math.cos(b)};a[0].y-=d.y,a[0].x-=d.x,a[1].y+=d.y,a[1].x+=d.x}for(e(c);c>1&&(!d.inImageWithBorder(a[0],0)||!d.inImageWithBorder(a[1],0));)c-=Math.ceil(c/2),e(-c);return a}function i(a){return[{x:(a[1][0]-a[0][0])/2+a[0][0],y:(a[1][1]-a[0][1])/2+a[0][1]},{x:(a[3][0]-a[2][0])/2+a[2][0],y:(a[3][1]-a[2][1])/2+a[2][1]}]}function j(e){var f,g=null,h=a.getBarcodeLine(d,e[0],e[1]);for(c.showFrequency&&(b.drawPath(e,{x:"x",y:"y"},o.ctx.overlay,{color:"red",lineWidth:3}),a.debug.printFrequency(h.line,o.dom.frequency)),a.toBinaryLine(h),c.showPattern&&a.debug.printPattern(h.line,o.dom.pattern),f=0;f<p.length&&null===g;f++)g=p[f].decodePattern(h.line);return null===g?null:{codeResult:g,barcodeLine:h}}function k(a,b,c){var d,e,f,g=Math.sqrt(Math.pow(a[1][0]-a[0][0],2)+Math.pow(a[1][1]-a[0][1],2)),h=16,i=null,k=Math.sin(c),l=Math.cos(c);for(d=1;h>d&&null===i;d++)e=g/h*d*(d%2===0?-1:1),f={y:e*k,x:e*l},b[0].y+=f.x,b[0].x-=f.y,b[1].y+=f.x,b[1].x-=f.y,i=j(b);return i}function m(a){return Math.sqrt(Math.pow(Math.abs(a[1].y-a[0].y),2)+Math.pow(Math.abs(a[1].x-a[0].x),2))}function n(a){var d,e,f,g,l=o.ctx.overlay;return c.drawBoundingBox&&l&&b.drawPath(a,{x:0,y:1},l,{color:"blue",lineWidth:2}),d=i(a),g=m(d),e=Math.atan2(d[1].y-d[0].y,d[1].x-d[0].x),d=h(d,e,Math.floor(.1*g)),null===d?null:(f=j(d),null===f&&(f=k(a,d,e)),null===f?null:(f&&c.drawScanline&&l&&b.drawPath(d,{x:"x",y:"y"},l,{color:"red",lineWidth:3}),{codeResult:f.codeResult,line:d,angle:e,pattern:f.barcodeLine.line,threshold:f.barcodeLine.threshold}))}var o={ctx:{frequency:null,pattern:null,overlay:null},dom:{frequency:null,pattern:null,overlay:null}},p=[];return e(),f(),g(),{decodeFromBoundingBox:function(a){return n(a)},decodeFromBoundingBoxes:function(a){var b,c;for(b=0;b<a.length;b++)if(c=n(a[b]),c&&c.codeResult)return c.box=a[b],c},setReaders:function(a){c.readers=a,p.length=0,f()}}}};return m}),d("frame_grabber",["cv_utils"],function(a){"use strict";var b={};return b.create=function(b,c){var d,e={},f=b.getConfig(),g=a.imageRef(b.getRealWidth(),b.getRealHeight()),h=b.getCanvasSize(),i=a.imageRef(b.getWidth(),b.getHeight()),j=b.getTopRight(),k=j.x,l=j.y,m=null,n=null;return d=c?c:document.createElement("canvas"),d.width=h.x,d.height=h.y,m=d.getContext("2d"),n=new Uint8Array(i.x*i.y),console.log("FrameGrabber",JSON.stringify({size:i,topRight:j,videoSize:g,canvasSize:h})),e.attachData=function(a){n=a},e.getData=function(){return n},e.grab=function(){var c,d=f.halfSample,e=b.getFrame();return e?(m.drawImage(e,0,0,h.x,h.y),c=m.getImageData(k,l,i.x,i.y).data,d?a.grayAndHalfSampleFromCanvasData(c,i,n):a.computeGray(c,n,f),!0):!1},e.getSize=function(){return i},e},b}),d("config",[],function(){var a={inputStream:{name:"Live",type:"LiveStream",constraints:{width:640,height:480,minAspectRatio:0,maxAspectRatio:100,facing:"environment"},area:{top:"0%",right:"0%",left:"0%",bottom:"0%"},singleChannel:!1},tracking:!1,debug:!1,controls:!1,locate:!0,numOfWorkers:4,visual:{show:!0},decoder:{drawBoundingBox:!1,showFrequency:!1,drawScanline:!1,showPattern:!1,readers:["code_128_reader"]},locator:{halfSample:!0,patchSize:"medium",showCanvas:!1,showPatches:!1,showFoundPatches:!1,showSkeleton:!1,showLabels:!1,showPatchLabels:!1,showRemainingPa