二维码生成工具

二维码生成工具

示例canvas

var createCanvas	= function(options){
    // if options is string, 
    if( typeof options === 'string' ){
        options	= { text: options };
    }
    var defaults = {
        text: location.href,
        render: "canvas",
        width: 256,
        height: 256,
        typeNumber: -1,
        correctLevel: QRErrorCorrectLevel.H,
        background: "#ffffff",
        foreground: "#000000"
    };
    options = {...defaults, ...options};
    // create the qrcode itself
    var qrcode	= new QRCode(options.typeNumber, options.correctLevel);
    qrcode.addData(options.text);
    qrcode.make();
    // create canvas element
    var canvas	= document.createElement('canvas');
    canvas.width	= options.width;
    canvas.height	= options.height;
    var ctx		= canvas.getContext('2d');
    // compute tileW/tileH based on options.width/options.height
    var tileW	= options.width  / qrcode.getModuleCount();
    var tileH	= options.height / qrcode.getModuleCount();
    // draw in the canvas
    for( var row = 0; row < qrcode.getModuleCount(); row++ ){
        for( var col = 0; col < qrcode.getModuleCount(); col++ ){
            ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
            var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));
            var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));
            ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h);  
        }	
    }
    // return just built canvas
    return canvas;
}
// 测试用例
document.body.appendChild(createCanvas());

验证table

function createTable(options) {
    // if options is string, 
    if( typeof options === 'string' ){
        options	= { text: options };
    }
    // Set defaults and merge options
    const defaults = {
        text: location.href,
        render: "table",
        width: 256,
        height: 256,
        typeNumber: -1,
        correctLevel: QRErrorCorrectLevel.H,
        background: "#ffffff",
        foreground: "#000000"
    };
    options = {...defaults, ...options};
    // Create QR code
    const qrcode = new QRCode(options.typeNumber, options.correctLevel);
    qrcode.addData(options.text);
    qrcode.make();
    // Create table element
    const table = document.createElement('table');
    table.style.border = "0";
    table.style.borderCollapse = "collapse";
    table.style.width = options.width + "px";
    table.style.height = options.height + "px";
    table.style.backgroundColor = options.background;
    // Calculate cell dimensions
    const cellCount = qrcode.getModuleCount();
    const cellW = options.width / cellCount;
    const cellH = options.height / cellCount;
    // Build table rows and cells
    for (let row = 0; row < cellCount; row++) {
        const tr = document.createElement('tr');
        tr.style.height = cellH + "px";
        for (let col = 0; col < cellCount; col++) {
            const td = document.createElement('td');
            td.style.width = cellW + "px";
            td.style.height = cellH + "px";
            td.style.padding = "0";
            td.style.margin = "0";
            td.style.backgroundColor = qrcode.isDark(row, col) 
                ? options.foreground 
                : options.background;
            tr.appendChild(td);
        }
        table.appendChild(tr);
    }
    return table;
}

// 测试用例
document.body.appendChild(createTable());

二维码生成工具qrcode.min.js

<script src="https://cdn.jsdelivr.net/npm/qrcodejs@1.0.0/qrcode.min.js"></script>
点击查看代码
var QRCode;!function(){function a(a){this.mode=c.MODE_8BIT_BYTE,this.data=a,this.parsedData=[];for(var b=[],d=0,e=this.data.length;e>d;d++){var f=this.data.charCodeAt(d);f>65536?(b[0]=240|(1835008&f)>>>18,b[1]=128|(258048&f)>>>12,b[2]=128|(4032&f)>>>6,b[3]=128|63&f):f>2048?(b[0]=224|(61440&f)>>>12,b[1]=128|(4032&f)>>>6,b[2]=128|63&f):f>128?(b[0]=192|(1984&f)>>>6,b[1]=128|63&f):b[0]=f,this.parsedData=this.parsedData.concat(b)}this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function b(a,b){this.typeNumber=a,this.errorCorrectLevel=b,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}function i(a,b){if(void 0==a.length)throw new Error(a.length+"/"+b);for(var c=0;c<a.length&&0==a[c];)c++;this.num=new Array(a.length-c+b);for(var d=0;d<a.length-c;d++)this.num[d]=a[d+c]}function j(a,b){this.totalCount=a,this.dataCount=b}function k(){this.buffer=[],this.length=0}function m(){return"undefined"!=typeof CanvasRenderingContext2D}function n(){var a=!1,b=navigator.userAgent;return/android/i.test(b)&&(a=!0,aMat=b.toString().match(/android ([0-9]\.[0-9])/i),aMat&&aMat[1]&&(a=parseFloat(aMat[1]))),a}function r(a,b){for(var c=1,e=s(a),f=0,g=l.length;g>=f;f++){var h=0;switch(b){case d.L:h=l[f][0];break;case d.M:h=l[f][1];break;case d.Q:h=l[f][2];break;case d.H:h=l[f][3]}if(h>=e)break;c++}if(c>l.length)throw new Error("Too long data");return c}function s(a){var b=encodeURI(a).toString().replace(/\%[0-9a-fA-F]{2}/g,"a");return b.length+(b.length!=a?3:0)}a.prototype={getLength:function(){return this.parsedData.length},write:function(a){for(var b=0,c=this.parsedData.length;c>b;b++)a.put(this.parsedData[b],8)}},b.prototype={addData:function(b){var c=new a(b);this.dataList.push(c),this.dataCache=null},isDark:function(a,b){if(0>a||this.moduleCount<=a||0>b||this.moduleCount<=b)throw new Error(a+","+b);return this.modules[a][b]},getModuleCount:function(){return this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(a,c){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var d=0;d<this.moduleCount;d++){this.modules[d]=new Array(this.moduleCount);for(var e=0;e<this.moduleCount;e++)this.modules[d][e]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(a,c),this.typeNumber>=7&&this.setupTypeNumber(a),null==this.dataCache&&(this.dataCache=b.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,c)},setupPositionProbePattern:function(a,b){for(var c=-1;7>=c;c++)if(!(-1>=a+c||this.moduleCount<=a+c))for(var d=-1;7>=d;d++)-1>=b+d||this.moduleCount<=b+d||(this.modules[a+c][b+d]=c>=0&&6>=c&&(0==d||6==d)||d>=0&&6>=d&&(0==c||6==c)||c>=2&&4>=c&&d>=2&&4>=d?!0:!1)},getBestMaskPattern:function(){for(var a=0,b=0,c=0;8>c;c++){this.makeImpl(!0,c);var d=f.getLostPoint(this);(0==c||a>d)&&(a=d,b=c)}return b},createMovieClip:function(a,b,c){var d=a.createEmptyMovieClip(b,c),e=1;this.make();for(var f=0;f<this.modules.length;f++)for(var g=f*e,h=0;h<this.modules[f].length;h++){var i=h*e,j=this.modules[f][h];j&&(d.beginFill(0,100),d.moveTo(i,g),d.lineTo(i+e,g),d.lineTo(i+e,g+e),d.lineTo(i,g+e),d.endFill())}return d},setupTimingPattern:function(){for(var a=8;a<this.moduleCount-8;a++)null==this.modules[a][6]&&(this.modules[a][6]=0==a%2);for(var b=8;b<this.moduleCount-8;b++)null==this.modules[6][b]&&(this.modules[6][b]=0==b%2)},setupPositionAdjustPattern:function(){for(var a=f.getPatternPosition(this.typeNumber),b=0;b<a.length;b++)for(var c=0;c<a.length;c++){var d=a[b],e=a[c];if(null==this.modules[d][e])for(var g=-2;2>=g;g++)for(var h=-2;2>=h;h++)this.modules[d+g][e+h]=-2==g||2==g||-2==h||2==h||0==g&&0==h?!0:!1}},setupTypeNumber:function(a){for(var b=f.getBCHTypeNumber(this.typeNumber),c=0;18>c;c++){var d=!a&&1==(1&b>>c);this.modules[Math.floor(c/3)][c%3+this.moduleCount-8-3]=d}for(var c=0;18>c;c++){var d=!a&&1==(1&b>>c);this.modules[c%3+this.moduleCount-8-3][Math.floor(c/3)]=d}},setupTypeInfo:function(a,b){for(var c=this.errorCorrectLevel<<3|b,d=f.getBCHTypeInfo(c),e=0;15>e;e++){var g=!a&&1==(1&d>>e);6>e?this.modules[e][8]=g:8>e?this.modules[e+1][8]=g:this.modules[this.moduleCount-15+e][8]=g}for(var e=0;15>e;e++){var g=!a&&1==(1&d>>e);8>e?this.modules[8][this.moduleCount-e-1]=g:9>e?this.modules[8][15-e-1+1]=g:this.modules[8][15-e-1]=g}this.modules[this.moduleCount-8][8]=!a},mapData:function(a,b){for(var c=-1,d=this.moduleCount-1,e=7,g=0,h=this.moduleCount-1;h>0;h-=2)for(6==h&&h--;;){for(var i=0;2>i;i++)if(null==this.modules[d][h-i]){var j=!1;g<a.length&&(j=1==(1&a[g]>>>e));var k=f.getMask(b,d,h-i);k&&(j=!j),this.modules[d][h-i]=j,e--,-1==e&&(g++,e=7)}if(d+=c,0>d||this.moduleCount<=d){d-=c,c=-c;break}}}},b.PAD0=236,b.PAD1=17,b.createData=function(a,c,d){for(var e=j.getRSBlocks(a,c),g=new k,h=0;h<d.length;h++){var i=d[h];g.put(i.mode,4),g.put(i.getLength(),f.getLengthInBits(i.mode,a)),i.write(g)}for(var l=0,h=0;h<e.length;h++)l+=e[h].dataCount;if(g.getLengthInBits()>8*l)throw new Error("code length overflow. ("+g.getLengthInBits()+">"+8*l+")");for(g.getLengthInBits()+4<=8*l&&g.put(0,4);0!=g.getLengthInBits()%8;)g.putBit(!1);for(;;){if(g.getLengthInBits()>=8*l)break;if(g.put(b.PAD0,8),g.getLengthInBits()>=8*l)break;g.put(b.PAD1,8)}return b.createBytes(g,e)},b.createBytes=function(a,b){for(var c=0,d=0,e=0,g=new Array(b.length),h=new Array(b.length),j=0;j<b.length;j++){var k=b[j].dataCount,l=b[j].totalCount-k;d=Math.max(d,k),e=Math.max(e,l),g[j]=new Array(k);for(var m=0;m<g[j].length;m++)g[j][m]=255&a.buffer[m+c];c+=k;var n=f.getErrorCorrectPolynomial(l),o=new i(g[j],n.getLength()-1),p=o.mod(n);h[j]=new Array(n.getLength()-1);for(var m=0;m<h[j].length;m++){var q=m+p.getLength()-h[j].length;h[j][m]=q>=0?p.get(q):0}}for(var r=0,m=0;m<b.length;m++)r+=b[m].totalCount;for(var s=new Array(r),t=0,m=0;d>m;m++)for(var j=0;j<b.length;j++)m<g[j].length&&(s[t++]=g[j][m]);for(var m=0;e>m;m++)for(var j=0;j<b.length;j++)m<h[j].length&&(s[t++]=h[j][m]);return s};for(var c={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},d={L:1,M:0,Q:3,H:2},e={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7},f={PATTERN_POSITION_TABLE:[[],[6,18],[6,22],[6,26],[6,30],[6,34],[6,22,38],[6,24,42],[6,26,46],[6,28,50],[6,30,54],[6,32,58],[6,34,62],[6,26,46,66],[6,26,48,70],[6,26,50,74],[6,30,54,78],[6,30,56,82],[6,30,58,86],[6,34,62,90],[6,28,50,72,94],[6,26,50,74,98],[6,30,54,78,102],[6,28,54,80,106],[6,32,58,84,110],[6,30,58,86,114],[6,34,62,90,118],[6,26,50,74,98,122],[6,30,54,78,102,126],[6,26,52,78,104,130],[6,30,56,82,108,134],[6,34,60,86,112,138],[6,30,58,86,114,142],[6,34,62,90,118,146],[6,30,54,78,102,126,150],[6,24,50,76,102,128,154],[6,28,54,80,106,132,158],[6,32,58,84,110,136,162],[6,26,54,82,110,138,166],[6,30,58,86,114,142,170]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(a){for(var b=a<<10;f.getBCHDigit(b)-f.getBCHDigit(f.G15)>=0;)b^=f.G15<<f.getBCHDigit(b)-f.getBCHDigit(f.G15);return(a<<10|b)^f.G15_MASK},getBCHTypeNumber:function(a){for(var b=a<<12;f.getBCHDigit(b)-f.getBCHDigit(f.G18)>=0;)b^=f.G18<<f.getBCHDigit(b)-f.getBCHDigit(f.G18);return a<<12|b},getBCHDigit:function(a){for(var b=0;0!=a;)b++,a>>>=1;return b},getPatternPosition:function(a){return f.PATTERN_POSITION_TABLE[a-1]},getMask:function(a,b,c){switch(a){case e.PATTERN000:return 0==(b+c)%2;case e.PATTERN001:return 0==b%2;case e.PATTERN010:return 0==c%3;case e.PATTERN011:return 0==(b+c)%3;case e.PATTERN100:return 0==(Math.floor(b/2)+Math.floor(c/3))%2;case e.PATTERN101:return 0==b*c%2+b*c%3;case e.PATTERN110:return 0==(b*c%2+b*c%3)%2;case e.PATTERN111:return 0==(b*c%3+(b+c)%2)%2;default:throw new Error("bad maskPattern:"+a)}},getErrorCorrectPolynomial:function(a){for(var b=new i([1],0),c=0;a>c;c++)b=b.multiply(new i([1,g.gexp(c)],0));return b},getLengthInBits:function(a,b){if(b>=1&&10>b)switch(a){case c.MODE_NUMBER:return 10;case c.MODE_ALPHA_NUM:return 9;case c.MODE_8BIT_BYTE:return 8;case c.MODE_KANJI:return 8;default:throw new Error("mode:"+a)}else if(27>b)switch(a){case c.MODE_NUMBER:return 12;case c.MODE_ALPHA_NUM:return 11;case c.MODE_8BIT_BYTE:return 16;case c.MODE_KANJI:return 10;default:throw new Error("mode:"+a)}else{if(!(41>b))throw new Error("type:"+b);switch(a){case c.MODE_NUMBER:return 14;case c.MODE_ALPHA_NUM:return 13;case c.MODE_8BIT_BYTE:return 16;case c.MODE_KANJI:return 12;default:throw new Error("mode:"+a)}}},getLostPoint:function(a){for(var b=a.getModuleCount(),c=0,d=0;b>d;d++)for(var e=0;b>e;e++){for(var f=0,g=a.isDark(d,e),h=-1;1>=h;h++)if(!(0>d+h||d+h>=b))for(var i=-1;1>=i;i++)0>e+i||e+i>=b||(0!=h||0!=i)&&g==a.isDark(d+h,e+i)&&f++;f>5&&(c+=3+f-5)}for(var d=0;b-1>d;d++)for(var e=0;b-1>e;e++){var j=0;a.isDark(d,e)&&j++,a.isDark(d+1,e)&&j++,a.isDark(d,e+1)&&j++,a.isDark(d+1,e+1)&&j++,(0==j||4==j)&&(c+=3)}for(var d=0;b>d;d++)for(var e=0;b-6>e;e++)a.isDark(d,e)&&!a.isDark(d,e+1)&&a.isDark(d,e+2)&&a.isDark(d,e+3)&&a.isDark(d,e+4)&&!a.isDark(d,e+5)&&a.isDark(d,e+6)&&(c+=40);for(var e=0;b>e;e++)for(var d=0;b-6>d;d++)a.isDark(d,e)&&!a.isDark(d+1,e)&&a.isDark(d+2,e)&&a.isDark(d+3,e)&&a.isDark(d+4,e)&&!a.isDark(d+5,e)&&a.isDark(d+6,e)&&(c+=40);for(var k=0,e=0;b>e;e++)for(var d=0;b>d;d++)a.isDark(d,e)&&k++;var l=Math.abs(100*k/b/b-50)/5;return c+=10*l}},g={glog:function(a){if(1>a)throw new Error("glog("+a+")");return g.LOG_TABLE[a]},gexp:function(a){for(;0>a;)a+=255;for(;a>=256;)a-=255;return g.EXP_TABLE[a]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},h=0;8>h;h++)g.EXP_TABLE[h]=1<<h;for(var h=8;256>h;h++)g.EXP_TABLE[h]=g.EXP_TABLE[h-4]^g.EXP_TABLE[h-5]^g.EXP_TABLE[h-6]^g.EXP_TABLE[h-8];for(var h=0;255>h;h++)g.LOG_TABLE[g.EXP_TABLE[h]]=h;i.prototype={get:function(a){return this.num[a]},getLength:function(){return this.num.length},multiply:function(a){for(var b=new Array(this.getLength()+a.getLength()-1),c=0;c<this.getLength();c++)for(var d=0;d<a.getLength();d++)b[c+d]^=g.gexp(g.glog(this.get(c))+g.glog(a.get(d)));return new i(b,0)},mod:function(a){if(this.getLength()-a.getLength()<0)return this;for(var b=g.glog(this.get(0))-g.glog(a.get(0)),c=new Array(this.getLength()),d=0;d<this.getLength();d++)c[d]=this.get(d);for(var d=0;d<a.getLength();d++)c[d]^=g.gexp(g.glog(a.get(d))+b);return new i(c,0).mod(a)}},j.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],j.getRSBlocks=function(a,b){var c=j.getRsBlockTable(a,b);if(void 0==c)throw new Error("bad rs block @ typeNumber:"+a+"/errorCorrectLevel:"+b);for(var d=c.length/3,e=[],f=0;d>f;f++)for(var g=c[3*f+0],h=c[3*f+1],i=c[3*f+2],k=0;g>k;k++)e.push(new j(h,i));return e},j.getRsBlockTable=function(a,b){switch(b){case d.L:return j.RS_BLOCK_TABLE[4*(a-1)+0];case d.M:return j.RS_BLOCK_TABLE[4*(a-1)+1];case d.Q:return j.RS_BLOCK_TABLE[4*(a-1)+2];case d.H:return j.RS_BLOCK_TABLE[4*(a-1)+3];default:return void 0}},k.prototype={get:function(a){var b=Math.floor(a/8);return 1==(1&this.buffer[b]>>>7-a%8)},put:function(a,b){for(var c=0;b>c;c++)this.putBit(1==(1&a>>>b-c-1))},getLengthInBits:function(){return this.length},putBit:function(a){var b=Math.floor(this.length/8);this.buffer.length<=b&&this.buffer.push(0),a&&(this.buffer[b]|=128>>>this.length%8),this.length++}};var l=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]],o=function(){var a=function(a,b){this._el=a,this._htOption=b};return a.prototype.draw=function(a){function g(a,b){var c=document.createElementNS("http://www.w3.org/2000/svg",a);for(var d in b)b.hasOwnProperty(d)&&c.setAttribute(d,b[d]);return c}var b=this._htOption,c=this._el,d=a.getModuleCount();Math.floor(b.width/d),Math.floor(b.height/d),this.clear();var h=g("svg",{viewBox:"0 0 "+String(d)+" "+String(d),width:"100%",height:"100%",fill:b.colorLight});h.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink"),c.appendChild(h),h.appendChild(g("rect",{fill:b.colorDark,width:"1",height:"1",id:"template"}));for(var i=0;d>i;i++)for(var j=0;d>j;j++)if(a.isDark(i,j)){var k=g("use",{x:String(i),y:String(j)});k.setAttributeNS("http://www.w3.org/1999/xlink","href","#template"),h.appendChild(k)}},a.prototype.clear=function(){for(;this._el.hasChildNodes();)this._el.removeChild(this._el.lastChild)},a}(),p="svg"===document.documentElement.tagName.toLowerCase(),q=p?o:m()?function(){function a(){this._elImage.src=this._elCanvas.toDataURL("image/png"),this._elImage.style.display="block",this._elCanvas.style.display="none"}function d(a,b){var c=this;if(c._fFail=b,c._fSuccess=a,null===c._bSupportDataURI){var d=document.createElement("img"),e=function(){c._bSupportDataURI=!1,c._fFail&&_fFail.call(c)},f=function(){c._bSupportDataURI=!0,c._fSuccess&&c._fSuccess.call(c)};return d.onabort=e,d.onerror=e,d.onload=f,d.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==",void 0}c._bSupportDataURI===!0&&c._fSuccess?c._fSuccess.call(c):c._bSupportDataURI===!1&&c._fFail&&c._fFail.call(c)}if(this._android&&this._android<=2.1){var b=1/window.devicePixelRatio,c=CanvasRenderingContext2D.prototype.drawImage;CanvasRenderingContext2D.prototype.drawImage=function(a,d,e,f,g,h,i,j){if("nodeName"in a&&/img/i.test(a.nodeName))for(var l=arguments.length-1;l>=1;l--)arguments[l]=arguments[l]*b;else"undefined"==typeof j&&(arguments[1]*=b,arguments[2]*=b,arguments[3]*=b,arguments[4]*=b);c.apply(this,arguments)}}var e=function(a,b){this._bIsPainted=!1,this._android=n(),this._htOption=b,this._elCanvas=document.createElement("canvas"),this._elCanvas.width=b.width,this._elCanvas.height=b.height,a.appendChild(this._elCanvas),this._el=a,this._oContext=this._elCanvas.getContext("2d"),this._bIsPainted=!1,this._elImage=document.createElement("img"),this._elImage.style.display="none",this._el.appendChild(this._elImage),this._bSupportDataURI=null};return e.prototype.draw=function(a){var b=this._elImage,c=this._oContext,d=this._htOption,e=a.getModuleCount(),f=d.width/e,g=d.height/e,h=Math.round(f),i=Math.round(g);b.style.display="none",this.clear();for(var j=0;e>j;j++)for(var k=0;e>k;k++){var l=a.isDark(j,k),m=k*f,n=j*g;c.strokeStyle=l?d.colorDark:d.colorLight,c.lineWidth=1,c.fillStyle=l?d.colorDark:d.colorLight,c.fillRect(m,n,f,g),c.strokeRect(Math.floor(m)+.5,Math.floor(n)+.5,h,i),c.strokeRect(Math.ceil(m)-.5,Math.ceil(n)-.5,h,i)}this._bIsPainted=!0},e.prototype.makeImage=function(){this._bIsPainted&&d.call(this,a)},e.prototype.isPainted=function(){return this._bIsPainted},e.prototype.clear=function(){this._oContext.clearRect(0,0,this._elCanvas.width,this._elCanvas.height),this._bIsPainted=!1},e.prototype.round=function(a){return a?Math.floor(1e3*a)/1e3:a},e}():function(){var a=function(a,b){this._el=a,this._htOption=b};return a.prototype.draw=function(a){for(var b=this._htOption,c=this._el,d=a.getModuleCount(),e=Math.floor(b.width/d),f=Math.floor(b.height/d),g=['<table style="border:0;border-collapse:collapse;">'],h=0;d>h;h++){g.push("<tr>");for(var i=0;d>i;i++)g.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;width:'+e+"px;height:"+f+"px;background-color:"+(a.isDark(h,i)?b.colorDark:b.colorLight)+';"></td>');g.push("</tr>")}g.push("</table>"),c.innerHTML=g.join("");var j=c.childNodes[0],k=(b.width-j.offsetWidth)/2,l=(b.height-j.offsetHeight)/2;k>0&&l>0&&(j.style.margin=l+"px "+k+"px")},a.prototype.clear=function(){this._el.innerHTML=""},a}();QRCode=function(a,b){if(this._htOption={width:256,height:256,typeNumber:4,colorDark:"#000000",colorLight:"#ffffff",correctLevel:d.H},"string"==typeof b&&(b={text:b}),b)for(var c in b)this._htOption[c]=b[c];"string"==typeof a&&(a=document.getElementById(a)),this._android=n(),this._el=a,this._oQRCode=null,this._oDrawing=new q(this._el,this._htOption),this._htOption.text&&this.makeCode(this._htOption.text)},QRCode.prototype.makeCode=function(a){this._oQRCode=new b(r(a,this._htOption.correctLevel),this._htOption.correctLevel),this._oQRCode.addData(a),this._oQRCode.make(),this._el.title=a,this._oDrawing.draw(this._oQRCode),this.makeImage()},QRCode.prototype.makeImage=function(){"function"==typeof this._oDrawing.makeImage&&(!this._android||this._android>=3)&&this._oDrawing.makeImage()},QRCode.prototype.clear=function(){this._oDrawing.clear()},QRCode.CorrectLevel=d}();

二维码生成工具qrcode.js

点击查看代码
//---------------------------------------------------------------------
// QR8bitByte
//---------------------------------------------------------------------

function QR8bitByte(data) {
	this.mode = QRMode.MODE_8BIT_BYTE;
	this.data = data;
}

QR8bitByte.prototype = {

	getLength : function(buffer) {
		return this.data.length;
	},
	
	write : function(buffer) {
		for (var i = 0; i < this.data.length; i++) {
			// not JIS ...
			buffer.put(this.data.charCodeAt(i), 8);
		}
	}
};

//---------------------------------------------------------------------
// QRCode
//---------------------------------------------------------------------

function QRCode(typeNumber, errorCorrectLevel) {
	this.typeNumber = typeNumber;
	this.errorCorrectLevel = errorCorrectLevel;
	this.modules = null;
	this.moduleCount = 0;
	this.dataCache = null;
	this.dataList = new Array();
}

QRCode.prototype = {
	
	addData : function(data) {
		var newData = new QR8bitByte(data);
		this.dataList.push(newData);
		this.dataCache = null;
	},
	
	isDark : function(row, col) {
		if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
			throw new Error(row + "," + col);
		}
		return this.modules[row][col];
	},

	getModuleCount : function() {
		return this.moduleCount;
	},
	
	make : function() {
		// Calculate automatically typeNumber if provided is < 1
		if (this.typeNumber < 1 ){
			var typeNumber = 1;
			for (typeNumber = 1; typeNumber < 40; typeNumber++) {
				var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);

				var buffer = new QRBitBuffer();
				var totalDataCount = 0;
				for (var i = 0; i < rsBlocks.length; i++) {
					totalDataCount += rsBlocks[i].dataCount;
				}

				for (var i = 0; i < this.dataList.length; i++) {
					var data = this.dataList[i];
					buffer.put(data.mode, 4);
					buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );
					data.write(buffer);
				}
				if (buffer.getLengthInBits() <= totalDataCount * 8)
					break;
			}
			this.typeNumber = typeNumber;
		}
		this.makeImpl(false, this.getBestMaskPattern() );
	},
	
	makeImpl : function(test, maskPattern) {
		
		this.moduleCount = this.typeNumber * 4 + 17;
		this.modules = new Array(this.moduleCount);
		
		for (var row = 0; row < this.moduleCount; row++) {
			
			this.modules[row] = new Array(this.moduleCount);
			
			for (var col = 0; col < this.moduleCount; col++) {
				this.modules[row][col] = null;//(col + row) % 3;
			}
		}
	
		this.setupPositionProbePattern(0, 0);
		this.setupPositionProbePattern(this.moduleCount - 7, 0);
		this.setupPositionProbePattern(0, this.moduleCount - 7);
		this.setupPositionAdjustPattern();
		this.setupTimingPattern();
		this.setupTypeInfo(test, maskPattern);
		
		if (this.typeNumber >= 7) {
			this.setupTypeNumber(test);
		}
	
		if (this.dataCache == null) {
			this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
		}
	
		this.mapData(this.dataCache, maskPattern);
	},

	setupPositionProbePattern : function(row, col)  {
		
		for (var r = -1; r <= 7; r++) {
			
			if (row + r <= -1 || this.moduleCount <= row + r) continue;
			
			for (var c = -1; c <= 7; c++) {
				
				if (col + c <= -1 || this.moduleCount <= col + c) continue;
				
				if ( (0 <= r && r <= 6 && (c == 0 || c == 6) )
						|| (0 <= c && c <= 6 && (r == 0 || r == 6) )
						|| (2 <= r && r <= 4 && 2 <= c && c <= 4) ) {
					this.modules[row + r][col + c] = true;
				} else {
					this.modules[row + r][col + c] = false;
				}
			}		
		}		
	},
	
	getBestMaskPattern : function() {
	
		var minLostPoint = 0;
		var pattern = 0;
	
		for (var i = 0; i < 8; i++) {
			
			this.makeImpl(true, i);
	
			var lostPoint = QRUtil.getLostPoint(this);
	
			if (i == 0 || minLostPoint >  lostPoint) {
				minLostPoint = lostPoint;
				pattern = i;
			}
		}
	
		return pattern;
	},
	
	createMovieClip : function(target_mc, instance_name, depth) {
	
		var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
		var cs = 1;
	
		this.make();

		for (var row = 0; row < this.modules.length; row++) {
			
			var y = row * cs;
			
			for (var col = 0; col < this.modules[row].length; col++) {
	
				var x = col * cs;
				var dark = this.modules[row][col];
			
				if (dark) {
					qr_mc.beginFill(0, 100);
					qr_mc.moveTo(x, y);
					qr_mc.lineTo(x + cs, y);
					qr_mc.lineTo(x + cs, y + cs);
					qr_mc.lineTo(x, y + cs);
					qr_mc.endFill();
				}
			}
		}
		
		return qr_mc;
	},

	setupTimingPattern : function() {
		
		for (var r = 8; r < this.moduleCount - 8; r++) {
			if (this.modules[r][6] != null) {
				continue;
			}
			this.modules[r][6] = (r % 2 == 0);
		}
	
		for (var c = 8; c < this.moduleCount - 8; c++) {
			if (this.modules[6][c] != null) {
				continue;
			}
			this.modules[6][c] = (c % 2 == 0);
		}
	},
	
	setupPositionAdjustPattern : function() {
	
		var pos = QRUtil.getPatternPosition(this.typeNumber);
		
		for (var i = 0; i < pos.length; i++) {
		
			for (var j = 0; j < pos.length; j++) {
			
				var row = pos[i];
				var col = pos[j];
				
				if (this.modules[row][col] != null) {
					continue;
				}
				
				for (var r = -2; r <= 2; r++) {
				
					for (var c = -2; c <= 2; c++) {
					
						if (r == -2 || r == 2 || c == -2 || c == 2 
								|| (r == 0 && c == 0) ) {
							this.modules[row + r][col + c] = true;
						} else {
							this.modules[row + r][col + c] = false;
						}
					}
				}
			}
		}
	},
	
	setupTypeNumber : function(test) {
	
		var bits = QRUtil.getBCHTypeNumber(this.typeNumber);
	
		for (var i = 0; i < 18; i++) {
			var mod = (!test && ( (bits >> i) & 1) == 1);
			this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
		}
	
		for (var i = 0; i < 18; i++) {
			var mod = (!test && ( (bits >> i) & 1) == 1);
			this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
		}
	},
	
	setupTypeInfo : function(test, maskPattern) {
	
		var data = (this.errorCorrectLevel << 3) | maskPattern;
		var bits = QRUtil.getBCHTypeInfo(data);
	
		// vertical		
		for (var i = 0; i < 15; i++) {
	
			var mod = (!test && ( (bits >> i) & 1) == 1);
	
			if (i < 6) {
				this.modules[i][8] = mod;
			} else if (i < 8) {
				this.modules[i + 1][8] = mod;
			} else {
				this.modules[this.moduleCount - 15 + i][8] = mod;
			}
		}
	
		// horizontal
		for (var i = 0; i < 15; i++) {
	
			var mod = (!test && ( (bits >> i) & 1) == 1);
			
			if (i < 8) {
				this.modules[8][this.moduleCount - i - 1] = mod;
			} else if (i < 9) {
				this.modules[8][15 - i - 1 + 1] = mod;
			} else {
				this.modules[8][15 - i - 1] = mod;
			}
		}
	
		// fixed module
		this.modules[this.moduleCount - 8][8] = (!test);
	
	},
	
	mapData : function(data, maskPattern) {
		
		var inc = -1;
		var row = this.moduleCount - 1;
		var bitIndex = 7;
		var byteIndex = 0;
		
		for (var col = this.moduleCount - 1; col > 0; col -= 2) {
	
			if (col == 6) col--;
	
			while (true) {
	
				for (var c = 0; c < 2; c++) {
					
					if (this.modules[row][col - c] == null) {
						
						var dark = false;
	
						if (byteIndex < data.length) {
							dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1);
						}
	
						var mask = QRUtil.getMask(maskPattern, row, col - c);
	
						if (mask) {
							dark = !dark;
						}
						
						this.modules[row][col - c] = dark;
						bitIndex--;
	
						if (bitIndex == -1) {
							byteIndex++;
							bitIndex = 7;
						}
					}
				}
								
				row += inc;
	
				if (row < 0 || this.moduleCount <= row) {
					row -= inc;
					inc = -inc;
					break;
				}
			}
		}
		
	}

};

QRCode.PAD0 = 0xEC;
QRCode.PAD1 = 0x11;

QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) {
	
	var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
	
	var buffer = new QRBitBuffer();
	
	for (var i = 0; i < dataList.length; i++) {
		var data = dataList[i];
		buffer.put(data.mode, 4);
		buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );
		data.write(buffer);
	}

	// calc num max data.
	var totalDataCount = 0;
	for (var i = 0; i < rsBlocks.length; i++) {
		totalDataCount += rsBlocks[i].dataCount;
	}

	if (buffer.getLengthInBits() > totalDataCount * 8) {
		throw new Error("code length overflow. ("
			+ buffer.getLengthInBits()
			+ ">"
			+  totalDataCount * 8
			+ ")");
	}

	// end code
	if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
		buffer.put(0, 4);
	}

	// padding
	while (buffer.getLengthInBits() % 8 != 0) {
		buffer.putBit(false);
	}

	// padding
	while (true) {
		
		if (buffer.getLengthInBits() >= totalDataCount * 8) {
			break;
		}
		buffer.put(QRCode.PAD0, 8);
		
		if (buffer.getLengthInBits() >= totalDataCount * 8) {
			break;
		}
		buffer.put(QRCode.PAD1, 8);
	}

	return QRCode.createBytes(buffer, rsBlocks);
}

QRCode.createBytes = function(buffer, rsBlocks) {

	var offset = 0;
	
	var maxDcCount = 0;
	var maxEcCount = 0;
	
	var dcdata = new Array(rsBlocks.length);
	var ecdata = new Array(rsBlocks.length);
	
	for (var r = 0; r < rsBlocks.length; r++) {

		var dcCount = rsBlocks[r].dataCount;
		var ecCount = rsBlocks[r].totalCount - dcCount;

		maxDcCount = Math.max(maxDcCount, dcCount);
		maxEcCount = Math.max(maxEcCount, ecCount);
		
		dcdata[r] = new Array(dcCount);
		
		for (var i = 0; i < dcdata[r].length; i++) {
			dcdata[r][i] = 0xff & buffer.buffer[i + offset];
		}
		offset += dcCount;
		
		var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
		var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);

		var modPoly = rawPoly.mod(rsPoly);
		ecdata[r] = new Array(rsPoly.getLength() - 1);
		for (var i = 0; i < ecdata[r].length; i++) {
            var modIndex = i + modPoly.getLength() - ecdata[r].length;
			ecdata[r][i] = (modIndex >= 0)? modPoly.get(modIndex) : 0;
		}

	}
	
	var totalCodeCount = 0;
	for (var i = 0; i < rsBlocks.length; i++) {
		totalCodeCount += rsBlocks[i].totalCount;
	}

	var data = new Array(totalCodeCount);
	var index = 0;

	for (var i = 0; i < maxDcCount; i++) {
		for (var r = 0; r < rsBlocks.length; r++) {
			if (i < dcdata[r].length) {
				data[index++] = dcdata[r][i];
			}
		}
	}

	for (var i = 0; i < maxEcCount; i++) {
		for (var r = 0; r < rsBlocks.length; r++) {
			if (i < ecdata[r].length) {
				data[index++] = ecdata[r][i];
			}
		}
	}

	return data;

}

//---------------------------------------------------------------------
// QRMode
//---------------------------------------------------------------------

var QRMode = {
	MODE_NUMBER :		1 << 0,
	MODE_ALPHA_NUM : 	1 << 1,
	MODE_8BIT_BYTE : 	1 << 2,
	MODE_KANJI :		1 << 3
};

//---------------------------------------------------------------------
// QRErrorCorrectLevel
//---------------------------------------------------------------------
 
var QRErrorCorrectLevel = {
	L : 1,
	M : 0,
	Q : 3,
	H : 2
};

//---------------------------------------------------------------------
// QRMaskPattern
//---------------------------------------------------------------------

var QRMaskPattern = {
	PATTERN000 : 0,
	PATTERN001 : 1,
	PATTERN010 : 2,
	PATTERN011 : 3,
	PATTERN100 : 4,
	PATTERN101 : 5,
	PATTERN110 : 6,
	PATTERN111 : 7
};

//---------------------------------------------------------------------
// QRUtil
//---------------------------------------------------------------------
 
var QRUtil = {

    PATTERN_POSITION_TABLE : [
	    [],
	    [6, 18],
	    [6, 22],
	    [6, 26],
	    [6, 30],
	    [6, 34],
	    [6, 22, 38],
	    [6, 24, 42],
	    [6, 26, 46],
	    [6, 28, 50],
	    [6, 30, 54],		
	    [6, 32, 58],
	    [6, 34, 62],
	    [6, 26, 46, 66],
	    [6, 26, 48, 70],
	    [6, 26, 50, 74],
	    [6, 30, 54, 78],
	    [6, 30, 56, 82],
	    [6, 30, 58, 86],
	    [6, 34, 62, 90],
	    [6, 28, 50, 72, 94],
	    [6, 26, 50, 74, 98],
	    [6, 30, 54, 78, 102],
	    [6, 28, 54, 80, 106],
	    [6, 32, 58, 84, 110],
	    [6, 30, 58, 86, 114],
	    [6, 34, 62, 90, 118],
	    [6, 26, 50, 74, 98, 122],
	    [6, 30, 54, 78, 102, 126],
	    [6, 26, 52, 78, 104, 130],
	    [6, 30, 56, 82, 108, 134],
	    [6, 34, 60, 86, 112, 138],
	    [6, 30, 58, 86, 114, 142],
	    [6, 34, 62, 90, 118, 146],
	    [6, 30, 54, 78, 102, 126, 150],
	    [6, 24, 50, 76, 102, 128, 154],
	    [6, 28, 54, 80, 106, 132, 158],
	    [6, 32, 58, 84, 110, 136, 162],
	    [6, 26, 54, 82, 110, 138, 166],
	    [6, 30, 58, 86, 114, 142, 170]
    ],

    G15 : (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    G18 : (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    G15_MASK : (1 << 14) | (1 << 12) | (1 << 10)	| (1 << 4) | (1 << 1),

    getBCHTypeInfo : function(data) {
	    var d = data << 10;
	    while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
		    d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) ) ); 	
	    }
	    return ( (data << 10) | d) ^ QRUtil.G15_MASK;
    },

    getBCHTypeNumber : function(data) {
	    var d = data << 12;
	    while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
		    d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) ) ); 	
	    }
	    return (data << 12) | d;
    },

    getBCHDigit : function(data) {

	    var digit = 0;

	    while (data != 0) {
		    digit++;
		    data >>>= 1;
	    }

	    return digit;
    },

    getPatternPosition : function(typeNumber) {
	    return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
    },

    getMask : function(maskPattern, i, j) {
	    
	    switch (maskPattern) {
		    
	    case QRMaskPattern.PATTERN000 : return (i + j) % 2 == 0;
	    case QRMaskPattern.PATTERN001 : return i % 2 == 0;
	    case QRMaskPattern.PATTERN010 : return j % 3 == 0;
	    case QRMaskPattern.PATTERN011 : return (i + j) % 3 == 0;
	    case QRMaskPattern.PATTERN100 : return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0;
	    case QRMaskPattern.PATTERN101 : return (i * j) % 2 + (i * j) % 3 == 0;
	    case QRMaskPattern.PATTERN110 : return ( (i * j) % 2 + (i * j) % 3) % 2 == 0;
	    case QRMaskPattern.PATTERN111 : return ( (i * j) % 3 + (i + j) % 2) % 2 == 0;

	    default :
		    throw new Error("bad maskPattern:" + maskPattern);
	    }
    },

    getErrorCorrectPolynomial : function(errorCorrectLength) {

	    var a = new QRPolynomial([1], 0);

	    for (var i = 0; i < errorCorrectLength; i++) {
		    a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0) );
	    }

	    return a;
    },

    getLengthInBits : function(mode, type) {

	    if (1 <= type && type < 10) {

		    // 1 - 9

		    switch(mode) {
		    case QRMode.MODE_NUMBER 	: return 10;
		    case QRMode.MODE_ALPHA_NUM 	: return 9;
		    case QRMode.MODE_8BIT_BYTE	: return 8;
		    case QRMode.MODE_KANJI  	: return 8;
		    default :
			    throw new Error("mode:" + mode);
		    }

	    } else if (type < 27) {

		    // 10 - 26

		    switch(mode) {
		    case QRMode.MODE_NUMBER 	: return 12;
		    case QRMode.MODE_ALPHA_NUM 	: return 11;
		    case QRMode.MODE_8BIT_BYTE	: return 16;
		    case QRMode.MODE_KANJI  	: return 10;
		    default :
			    throw new Error("mode:" + mode);
		    }

	    } else if (type < 41) {

		    // 27 - 40

		    switch(mode) {
		    case QRMode.MODE_NUMBER 	: return 14;
		    case QRMode.MODE_ALPHA_NUM	: return 13;
		    case QRMode.MODE_8BIT_BYTE	: return 16;
		    case QRMode.MODE_KANJI  	: return 12;
		    default :
			    throw new Error("mode:" + mode);
		    }

	    } else {
		    throw new Error("type:" + type);
	    }
    },

    getLostPoint : function(qrCode) {
	    
	    var moduleCount = qrCode.getModuleCount();
	    
	    var lostPoint = 0;
	    
	    // LEVEL1
	    
	    for (var row = 0; row < moduleCount; row++) {

		    for (var col = 0; col < moduleCount; col++) {

			    var sameCount = 0;
			    var dark = qrCode.isDark(row, col);

				for (var r = -1; r <= 1; r++) {

				    if (row + r < 0 || moduleCount <= row + r) {
					    continue;
				    }

				    for (var c = -1; c <= 1; c++) {

					    if (col + c < 0 || moduleCount <= col + c) {
						    continue;
					    }

					    if (r == 0 && c == 0) {
						    continue;
					    }

					    if (dark == qrCode.isDark(row + r, col + c) ) {
						    sameCount++;
					    }
				    }
			    }

			    if (sameCount > 5) {
				    lostPoint += (3 + sameCount - 5);
			    }
		    }
	    }

	    // LEVEL2

	    for (var row = 0; row < moduleCount - 1; row++) {
		    for (var col = 0; col < moduleCount - 1; col++) {
			    var count = 0;
			    if (qrCode.isDark(row,     col    ) ) count++;
			    if (qrCode.isDark(row + 1, col    ) ) count++;
			    if (qrCode.isDark(row,     col + 1) ) count++;
			    if (qrCode.isDark(row + 1, col + 1) ) count++;
			    if (count == 0 || count == 4) {
				    lostPoint += 3;
			    }
		    }
	    }

	    // LEVEL3

	    for (var row = 0; row < moduleCount; row++) {
		    for (var col = 0; col < moduleCount - 6; col++) {
			    if (qrCode.isDark(row, col)
					    && !qrCode.isDark(row, col + 1)
					    &&  qrCode.isDark(row, col + 2)
					    &&  qrCode.isDark(row, col + 3)
					    &&  qrCode.isDark(row, col + 4)
					    && !qrCode.isDark(row, col + 5)
					    &&  qrCode.isDark(row, col + 6) ) {
				    lostPoint += 40;
			    }
		    }
	    }

	    for (var col = 0; col < moduleCount; col++) {
		    for (var row = 0; row < moduleCount - 6; row++) {
			    if (qrCode.isDark(row, col)
					    && !qrCode.isDark(row + 1, col)
					    &&  qrCode.isDark(row + 2, col)
					    &&  qrCode.isDark(row + 3, col)
					    &&  qrCode.isDark(row + 4, col)
					    && !qrCode.isDark(row + 5, col)
					    &&  qrCode.isDark(row + 6, col) ) {
				    lostPoint += 40;
			    }
		    }
	    }

	    // LEVEL4
	    
	    var darkCount = 0;

	    for (var col = 0; col < moduleCount; col++) {
		    for (var row = 0; row < moduleCount; row++) {
			    if (qrCode.isDark(row, col) ) {
				    darkCount++;
			    }
		    }
	    }
	    
	    var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
	    lostPoint += ratio * 10;

	    return lostPoint;		
    }

};


//---------------------------------------------------------------------
// QRMath
//---------------------------------------------------------------------

var QRMath = {

	glog : function(n) {
	
		if (n < 1) {
			throw new Error("glog(" + n + ")");
		}
		
		return QRMath.LOG_TABLE[n];
	},
	
	gexp : function(n) {
	
		while (n < 0) {
			n += 255;
		}
	
		while (n >= 256) {
			n -= 255;
		}
	
		return QRMath.EXP_TABLE[n];
	},
	
	EXP_TABLE : new Array(256),
	
	LOG_TABLE : new Array(256)

};
	
for (var i = 0; i < 8; i++) {
	QRMath.EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i++) {
	QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4]
		^ QRMath.EXP_TABLE[i - 5]
		^ QRMath.EXP_TABLE[i - 6]
		^ QRMath.EXP_TABLE[i - 8];
}
for (var i = 0; i < 255; i++) {
	QRMath.LOG_TABLE[QRMath.EXP_TABLE[i] ] = i;
}

//---------------------------------------------------------------------
// QRPolynomial
//---------------------------------------------------------------------

function QRPolynomial(num, shift) {

	if (num.length == undefined) {
		throw new Error(num.length + "/" + shift);
	}

	var offset = 0;

	while (offset < num.length && num[offset] == 0) {
		offset++;
	}

	this.num = new Array(num.length - offset + shift);
	for (var i = 0; i < num.length - offset; i++) {
		this.num[i] = num[i + offset];
	}
}

QRPolynomial.prototype = {

	get : function(index) {
		return this.num[index];
	},
	
	getLength : function() {
		return this.num.length;
	},
	
	multiply : function(e) {
	
		var num = new Array(this.getLength() + e.getLength() - 1);
	
		for (var i = 0; i < this.getLength(); i++) {
			for (var j = 0; j < e.getLength(); j++) {
				num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i) ) + QRMath.glog(e.get(j) ) );
			}
		}
	
		return new QRPolynomial(num, 0);
	},
	
	mod : function(e) {
	
		if (this.getLength() - e.getLength() < 0) {
			return this;
		}
	
		var ratio = QRMath.glog(this.get(0) ) - QRMath.glog(e.get(0) );
	
		var num = new Array(this.getLength() );
		
		for (var i = 0; i < this.getLength(); i++) {
			num[i] = this.get(i);
		}
		
		for (var i = 0; i < e.getLength(); i++) {
			num[i] ^= QRMath.gexp(QRMath.glog(e.get(i) ) + ratio);
		}
	
		// recursive call
		return new QRPolynomial(num, 0).mod(e);
	}
};

//---------------------------------------------------------------------
// QRRSBlock
//---------------------------------------------------------------------

function QRRSBlock(totalCount, dataCount) {
	this.totalCount = totalCount;
	this.dataCount  = dataCount;
}

QRRSBlock.RS_BLOCK_TABLE = [

	// L
	// M
	// Q
	// H

	// 1
	[1, 26, 19],
	[1, 26, 16],
	[1, 26, 13],
	[1, 26, 9],
	
	// 2
	[1, 44, 34],
	[1, 44, 28],
	[1, 44, 22],
	[1, 44, 16],

	// 3
	[1, 70, 55],
	[1, 70, 44],
	[2, 35, 17],
	[2, 35, 13],

	// 4		
	[1, 100, 80],
	[2, 50, 32],
	[2, 50, 24],
	[4, 25, 9],
	
	// 5
	[1, 134, 108],
	[2, 67, 43],
	[2, 33, 15, 2, 34, 16],
	[2, 33, 11, 2, 34, 12],
	
	// 6
	[2, 86, 68],
	[4, 43, 27],
	[4, 43, 19],
	[4, 43, 15],
	
	// 7		
	[2, 98, 78],
	[4, 49, 31],
	[2, 32, 14, 4, 33, 15],
	[4, 39, 13, 1, 40, 14],
	
	// 8
	[2, 121, 97],
	[2, 60, 38, 2, 61, 39],
	[4, 40, 18, 2, 41, 19],
	[4, 40, 14, 2, 41, 15],
	
	// 9
	[2, 146, 116],
	[3, 58, 36, 2, 59, 37],
	[4, 36, 16, 4, 37, 17],
	[4, 36, 12, 4, 37, 13],
	
	// 10		
	[2, 86, 68, 2, 87, 69],
	[4, 69, 43, 1, 70, 44],
	[6, 43, 19, 2, 44, 20],
	[6, 43, 15, 2, 44, 16],

	// 11
	[4, 101, 81],
	[1, 80, 50, 4, 81, 51],
	[4, 50, 22, 4, 51, 23],
	[3, 36, 12, 8, 37, 13],

	// 12
	[2, 116, 92, 2, 117, 93],
	[6, 58, 36, 2, 59, 37],
	[4, 46, 20, 6, 47, 21],
	[7, 42, 14, 4, 43, 15],

	// 13
	[4, 133, 107],
	[8, 59, 37, 1, 60, 38],
	[8, 44, 20, 4, 45, 21],
	[12, 33, 11, 4, 34, 12],

	// 14
	[3, 145, 115, 1, 146, 116],
	[4, 64, 40, 5, 65, 41],
	[11, 36, 16, 5, 37, 17],
	[11, 36, 12, 5, 37, 13],

	// 15
	[5, 109, 87, 1, 110, 88],
	[5, 65, 41, 5, 66, 42],
	[5, 54, 24, 7, 55, 25],
	[11, 36, 12],

	// 16
	[5, 122, 98, 1, 123, 99],
	[7, 73, 45, 3, 74, 46],
	[15, 43, 19, 2, 44, 20],
	[3, 45, 15, 13, 46, 16],

	// 17
	[1, 135, 107, 5, 136, 108],
	[10, 74, 46, 1, 75, 47],
	[1, 50, 22, 15, 51, 23],
	[2, 42, 14, 17, 43, 15],

	// 18
	[5, 150, 120, 1, 151, 121],
	[9, 69, 43, 4, 70, 44],
	[17, 50, 22, 1, 51, 23],
	[2, 42, 14, 19, 43, 15],

	// 19
	[3, 141, 113, 4, 142, 114],
	[3, 70, 44, 11, 71, 45],
	[17, 47, 21, 4, 48, 22],
	[9, 39, 13, 16, 40, 14],

	// 20
	[3, 135, 107, 5, 136, 108],
	[3, 67, 41, 13, 68, 42],
	[15, 54, 24, 5, 55, 25],
	[15, 43, 15, 10, 44, 16],

	// 21
	[4, 144, 116, 4, 145, 117],
	[17, 68, 42],
	[17, 50, 22, 6, 51, 23],
	[19, 46, 16, 6, 47, 17],

	// 22
	[2, 139, 111, 7, 140, 112],
	[17, 74, 46],
	[7, 54, 24, 16, 55, 25],
	[34, 37, 13],

	// 23
	[4, 151, 121, 5, 152, 122],
	[4, 75, 47, 14, 76, 48],
	[11, 54, 24, 14, 55, 25],
	[16, 45, 15, 14, 46, 16],

	// 24
	[6, 147, 117, 4, 148, 118],
	[6, 73, 45, 14, 74, 46],
	[11, 54, 24, 16, 55, 25],
	[30, 46, 16, 2, 47, 17],

	// 25
	[8, 132, 106, 4, 133, 107],
	[8, 75, 47, 13, 76, 48],
	[7, 54, 24, 22, 55, 25],
	[22, 45, 15, 13, 46, 16],

	// 26
	[10, 142, 114, 2, 143, 115],
	[19, 74, 46, 4, 75, 47],
	[28, 50, 22, 6, 51, 23],
	[33, 46, 16, 4, 47, 17],

	// 27
	[8, 152, 122, 4, 153, 123],
	[22, 73, 45, 3, 74, 46],
	[8, 53, 23, 26, 54, 24],
	[12, 45, 15, 28, 46, 16],

	// 28
	[3, 147, 117, 10, 148, 118],
	[3, 73, 45, 23, 74, 46],
	[4, 54, 24, 31, 55, 25],
	[11, 45, 15, 31, 46, 16],

	// 29
	[7, 146, 116, 7, 147, 117],
	[21, 73, 45, 7, 74, 46],
	[1, 53, 23, 37, 54, 24],
	[19, 45, 15, 26, 46, 16],

	// 30
	[5, 145, 115, 10, 146, 116],
	[19, 75, 47, 10, 76, 48],
	[15, 54, 24, 25, 55, 25],
	[23, 45, 15, 25, 46, 16],

	// 31
	[13, 145, 115, 3, 146, 116],
	[2, 74, 46, 29, 75, 47],
	[42, 54, 24, 1, 55, 25],
	[23, 45, 15, 28, 46, 16],

	// 32
	[17, 145, 115],
	[10, 74, 46, 23, 75, 47],
	[10, 54, 24, 35, 55, 25],
	[19, 45, 15, 35, 46, 16],

	// 33
	[17, 145, 115, 1, 146, 116],
	[14, 74, 46, 21, 75, 47],
	[29, 54, 24, 19, 55, 25],
	[11, 45, 15, 46, 46, 16],

	// 34
	[13, 145, 115, 6, 146, 116],
	[14, 74, 46, 23, 75, 47],
	[44, 54, 24, 7, 55, 25],
	[59, 46, 16, 1, 47, 17],

	// 35
	[12, 151, 121, 7, 152, 122],
	[12, 75, 47, 26, 76, 48],
	[39, 54, 24, 14, 55, 25],
	[22, 45, 15, 41, 46, 16],

	// 36
	[6, 151, 121, 14, 152, 122],
	[6, 75, 47, 34, 76, 48],
	[46, 54, 24, 10, 55, 25],
	[2, 45, 15, 64, 46, 16],

	// 37
	[17, 152, 122, 4, 153, 123],
	[29, 74, 46, 14, 75, 47],
	[49, 54, 24, 10, 55, 25],
	[24, 45, 15, 46, 46, 16],

	// 38
	[4, 152, 122, 18, 153, 123],
	[13, 74, 46, 32, 75, 47],
	[48, 54, 24, 14, 55, 25],
	[42, 45, 15, 32, 46, 16],

	// 39
	[20, 147, 117, 4, 148, 118],
	[40, 75, 47, 7, 76, 48],
	[43, 54, 24, 22, 55, 25],
	[10, 45, 15, 67, 46, 16],

	// 40
	[19, 148, 118, 6, 149, 119],
	[18, 75, 47, 31, 76, 48],
	[34, 54, 24, 34, 55, 25],
	[20, 45, 15, 61, 46, 16]
];

QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {
	
	var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
	
	if (rsBlock == undefined) {
		throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
	}

	var length = rsBlock.length / 3;
	
	var list = new Array();
	
	for (var i = 0; i < length; i++) {

		var count = rsBlock[i * 3 + 0];
		var totalCount = rsBlock[i * 3 + 1];
		var dataCount  = rsBlock[i * 3 + 2];

		for (var j = 0; j < count; j++) {
			list.push(new QRRSBlock(totalCount, dataCount) );	
		}
	}
	
	return list;
}

QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {

	switch(errorCorrectLevel) {
	case QRErrorCorrectLevel.L :
		return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
	case QRErrorCorrectLevel.M :
		return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
	case QRErrorCorrectLevel.Q :
		return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
	case QRErrorCorrectLevel.H :
		return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
	default :
		return undefined;
	}
}

//---------------------------------------------------------------------
// QRBitBuffer
//---------------------------------------------------------------------

function QRBitBuffer() {
	this.buffer = new Array();
	this.length = 0;
}

QRBitBuffer.prototype = {

	get : function(index) {
		var bufIndex = Math.floor(index / 8);
		return ( (this.buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1;
	},
	
	put : function(num, length) {
		for (var i = 0; i < length; i++) {
			this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1);
		}
	},
	
	getLengthInBits : function() {
		return this.length;
	},
	
	putBit : function(bit) {
	
		var bufIndex = Math.floor(this.length / 8);
		if (this.buffer.length <= bufIndex) {
			this.buffer.push(0);
		}
	
		if (bit) {
			this.buffer[bufIndex] |= (0x80 >>> (this.length % 8) );
		}
	
		this.length++;
	}
};
posted @ 2025-07-08 22:18  明月心~  阅读(67)  评论(0)    收藏  举报