1.用js生成二维码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>生成二维码</title> </head> <body> <div id="qrcode"></div> <script src="qrcode.js"></script> <script type="text/javascript"> window.onload =function(){ // 生成二维码 var qrcode = new QRCode(document.getElementById("qrcode"), { width : 210,//设置宽高 height : 210 }); qrcode.makeCode("http://www.baidu.com"); } </script> </body> </html>
qrcode.js文件：
/*from tccdn minify at 2014-6-4 14:59:43,file：/cn/c/c/qrcode.js*/ /** * @fileoverview * - Using the 'QRCode for Javascript library' * - Fixed dataset of 'QRCode for Javascript library' for support full-spec. * - this library has no dependencies. * * @author davidshimjs * @see <a href="http://www.d-project.com/" target="_blank">http://www.d-project.com/</a> * @see <a href="http://jeromeetienne.github.com/jquery-qrcode/" target="_blank">http://jeromeetienne.github.com/jquery-qrcode/</a> */ var QRCode; /** * @fileoverview * - Using the 'QRCode for Javascript library' * - Fixed dataset of 'QRCode for Javascript library' for support full-spec. * - this library has no dependencies. * * @author davidshimjs * @see <a href="http://www.d-project.com/" target="_blank">http://www.d-project.com/</a> * @see <a href="http://jeromeetienne.github.com/jquery-qrcode/" target="_blank">http://jeromeetienne.github.com/jquery-qrcode/</a> */ !(function () { //--------------------------------------------------------------------- // QRCode for JavaScript // // Copyright (c) 2009 Kazuhiko Arase // // URL: http://www.d-project.com/ // // Licensed under the MIT license: // http://www.opensource.org/licenses/mit-license.php // // The word "QR Code" is registered trademark of // DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/faqpatent-e.html // //--------------------------------------------------------------------- function QR8bitByte(data) { this.mode = QRMode.MODE_8BIT_BYTE; this.data = data; this.parsedData = []; // Added to support UTF-8 Characters for (var i = 0, l = this.data.length; i < l; i++) { var byteArray = []; var code = this.data.charCodeAt(i); if (code > 0x10000) { byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18); byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12); byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6); byteArray[3] = 0x80 | (code & 0x3F); } else if (code > 0x800) { byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12); byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6); byteArray[2] = 0x80 | (code & 0x3F); } else if (code > 0x80) { byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6); byteArray[1] = 0x80 | (code & 0x3F); } else { byteArray[0] = code; } this.parsedData.push(byteArray); } this.parsedData = Array.prototype.concat.apply([], this.parsedData); if (this.parsedData.length != this.data.length) { this.parsedData.unshift(191); this.parsedData.unshift(187); this.parsedData.unshift(239); } } QR8bitByte.prototype = { getLength: function (buffer) { return this.parsedData.length; }, write: function (buffer) { for (var i = 0, l = this.parsedData.length; i < l; i++) { buffer.put(this.parsedData[i], 8); } } }; function QRCodeModel(typeNumber, errorCorrectLevel) { this.typeNumber = typeNumber; this.errorCorrectLevel = errorCorrectLevel; this.modules = null; this.moduleCount = 0; this.dataCache = null; this.dataList = []; } QRCodeModel.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(){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;}} 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=QRCodeModel.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);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;}} 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;}} 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;}}}}};QRCodeModel.PAD0=0xEC;QRCodeModel.PAD1=0x11;QRCodeModel.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);} 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 +")");} if(buffer.getLengthInBits()+4<=totalDataCount*8){buffer.put(0,4);} while(buffer.getLengthInBits()%8!=0){buffer.putBit(false);} while(true){if(buffer.getLengthInBits()>=totalDataCount*8){break;} buffer.put(QRCodeModel.PAD0,8);if(buffer.getLengthInBits()>=totalDataCount*8){break;} buffer.put(QRCodeModel.PAD1,8);} return QRCodeModel.createBytes(buffer,rsBlocks);};QRCodeModel.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;};var QRMode={MODE_NUMBER:1<<0,MODE_ALPHA_NUM:1<<1,MODE_8BIT_BYTE:1<<2,MODE_KANJI:1<<3};var QRErrorCorrectLevel={L:1,M:0,Q:3,H:2};var QRMaskPattern={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7};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){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){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){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;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);}}} 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;}}} 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;}}} 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;}};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;} 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);} return new QRPolynomial(num,0).mod(e);}};function QRRSBlock(totalCount,dataCount){this.totalCount=totalCount;this.dataCount=dataCount;} QRRSBlock.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]];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=[];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;}};function QRBitBuffer(){this.buffer=[];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++;}};var QRCodeLimitLength=[[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]]; function _isSupportCanvas() { return typeof CanvasRenderingContext2D != "undefined"; } // android 2.x doesn't support Data-URI spec function _getAndroid() { var android = false; var sAgent = navigator.userAgent; if (/android/i.test(sAgent)) { // android android = true; var aMat = sAgent.toString().match(/android ([0-9].[0-9])/i); if (aMat && aMat[1]) { android = parseFloat(aMat[1]); } } return android; } var svgDrawer = (function() { var Drawing = function (el, htOption) { this._el = el; this._htOption = htOption; }; Drawing.prototype.draw = function (oQRCode) { var _htOption = this._htOption; var _el = this._el; var nCount = oQRCode.getModuleCount(); var nWidth = Math.floor(_htOption.width / nCount); var nHeight = Math.floor(_htOption.height / nCount); this.clear(); function makeSVG(tag, attrs) { var el = document.createElementNS('http://www.w3.org/2000/svg', tag); for (var k in attrs) if (attrs.hasOwnProperty(k)) el.setAttribute(k, attrs[k]); return el; } var svg = makeSVG("svg" , {'viewBox': '0 0 ' + String(nCount) + " " + String(nCount), 'width': '100%', 'height': '100%', 'fill': _htOption.colorLight}); svg.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", "http://www.w3.org/1999/xlink"); _el.appendChild(svg); svg.appendChild(makeSVG("rect", {"fill": _htOption.colorLight, "width": "100%", "height": "100%"})); svg.appendChild(makeSVG("rect", {"fill": _htOption.colorDark, "width": "1", "height": "1", "id": "template"})); for (var row = 0; row < nCount; row++) { for (var col = 0; col < nCount; col++) { if (oQRCode.isDark(row, col)) { var child = makeSVG("use", {"x": String(col), "y": String(row)}); child.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#template") svg.appendChild(child); } } } }; Drawing.prototype.clear = function () { while (this._el.hasChildNodes()) this._el.removeChild(this._el.lastChild); }; return Drawing; })(); var useSVG = document.documentElement.tagName.toLowerCase() === "svg"; // Drawing in DOM by using Table tag var Drawing = useSVG ? svgDrawer : !_isSupportCanvas() ? (function () { var Drawing = function (el, htOption) { this._el = el; this._htOption = htOption; }; /** * Draw the QRCode * * @param {QRCode} oQRCode */ Drawing.prototype.draw = function (oQRCode) { var _htOption = this._htOption; var _el = this._el; var nCount = oQRCode.getModuleCount(); var nWidth = Math.floor(_htOption.width / nCount); var nHeight = Math.floor(_htOption.height / nCount); var aHTML = ['<table style="border:0;border-collapse:collapse;">']; for (var row = 0; row < nCount; row++) { aHTML.push('<tr>'); for (var col = 0; col < nCount; col++) { aHTML.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;' + nWidth + 'px;height:' + nHeight + 'px;background-color:' + (oQRCode.isDark(row, col) ? _htOption.colorDark : _htOption.colorLight) + ';"></td>'); } aHTML.push('</tr>'); } aHTML.push('</table>'); _el.innerHTML = aHTML.join(''); // Fix the margin values as real size. var elTable = _el.childNodes[0]; var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2; var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2; if (nLeftMarginTable > 0 && nTopMarginTable > 0) { elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px"; } }; /** * Clear the QRCode */ Drawing.prototype.clear = function () { this._el.innerHTML = ''; }; return Drawing; })() : (function () { // Drawing in Canvas function _onMakeImage() { this._elImage.src = this._elCanvas.toDataURL("image/png"); this._elImage.style.display = "block"; this._elCanvas.style.display = "none"; } // Android 2.1 bug workaround // http://code.google.com/p/android/issues/detail?id=5141 if (this._android && this._android <= 2.1) { var factor = 1 / window.devicePixelRatio; var drawImage = CanvasRenderingContext2D.prototype.drawImage; CanvasRenderingContext2D.prototype.drawImage = function (image, sx, sy, sw, sh, dx, dy, dw, dh) { if (("nodeName" in image) && /img/i.test(image.nodeName)) { for (var i = arguments.length - 1; i >= 1; i--) { arguments[i] = arguments[i] * factor; } } else if (typeof dw == "undefined") { arguments[1] *= factor; arguments[2] *= factor; arguments[3] *= factor; arguments[4] *= factor; } drawImage.apply(this, arguments); }; } /** * Check whether the user's browser supports Data URI or not * * @private * @param {Function} fSuccess Occurs if it supports Data URI * @param {Function} fFail Occurs if it doesn't support Data URI */ function _safeSetDataURI(fSuccess, fFail) { var self = this; self._fFail = fFail; self._fSuccess = fSuccess; // Check it just once if (self._bSupportDataURI === null) { var el = document.createElement("img"); var fOnError = function() { self._bSupportDataURI = false; if (self._fFail) { self._fFail.call(self); } }; var fOnSuccess = function() { self._bSupportDataURI = true; if (self._fSuccess) { self._fSuccess.call(self); } }; el.onabort = fOnError; el.onerror = fOnError; el.onload = fOnSuccess; el.src = "data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="; // the Image contains 1px data. return; } else if (self._bSupportDataURI === true && self._fSuccess) { self._fSuccess.call(self); } else if (self._bSupportDataURI === false && self._fFail) { self._fFail.call(self); } }; /** * Drawing QRCode by using canvas * * @constructor * @param {HTMLElement} el * @param {Object} htOption QRCode Options */ var Drawing = function (el, htOption) { this._bIsPainted = false; this._android = _getAndroid(); this._htOption = htOption; this._elCanvas = document.createElement("canvas"); this._elCanvas.width = htOption.width; this._elCanvas.height = htOption.height; el.appendChild(this._elCanvas); this._el = el; this._oContext = this._elCanvas.getContext("2d"); this._bIsPainted = false; this._elImage = document.createElement("img"); this._elImage.alt = "Scan me!"; this._elImage.style.display = "none"; this._el.appendChild(this._elImage); this._bSupportDataURI = null; }; /** * Draw the QRCode * * @param {QRCode} oQRCode */ Drawing.prototype.draw = function (oQRCode) { var _elImage = this._elImage; var _oContext = this._oContext; var _htOption = this._htOption; var nCount = oQRCode.getModuleCount(); var nWidth = _htOption.width / nCount; var nHeight = _htOption.height / nCount; var nRoundedWidth = Math.round(nWidth); var nRoundedHeight = Math.round(nHeight); _elImage.style.display = "none"; this.clear(); for (var row = 0; row < nCount; row++) { for (var col = 0; col < nCount; col++) { var bIsDark = oQRCode.isDark(row, col); var nLeft = col * nWidth; var nTop = row * nHeight; _oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; _oContext.lineWidth = 1; _oContext.fillStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; _oContext.fillRect(nLeft, nTop, nWidth, nHeight); // 안티 앨리어싱 방지 처리 _oContext.strokeRect( Math.floor(nLeft) + 0.5, Math.floor(nTop) + 0.5, nRoundedWidth, nRoundedHeight ); _oContext.strokeRect( Math.ceil(nLeft) - 0.5, Math.ceil(nTop) - 0.5, nRoundedWidth, nRoundedHeight ); } } this._bIsPainted = true; }; /** * Make the image from Canvas if the browser supports Data URI. */ Drawing.prototype.makeImage = function () { if (this._bIsPainted) { _safeSetDataURI.call(this, _onMakeImage); } }; /** * Return whether the QRCode is painted or not * * @return {Boolean} */ Drawing.prototype.isPainted = function () { return this._bIsPainted; }; /** * Clear the QRCode */ Drawing.prototype.clear = function () { this._oContext.clearRect(0, 0, this._elCanvas.width, this._elCanvas.height); this._bIsPainted = false; }; /** * @private * @param {Number} nNumber */ Drawing.prototype.round = function (nNumber) { if (!nNumber) { return nNumber; } return Math.floor(nNumber * 1000) / 1000; }; return Drawing; })(); /** * Get the type by string length * * @private * @param {String} sText * @param {Number} nCorrectLevel * @return {Number} type */ function _getTypeNumber(sText, nCorrectLevel) { var nType = 1; var length = _getUTF8Length(sText); for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) { var nLimit = 0; switch (nCorrectLevel) { case QRErrorCorrectLevel.L : nLimit = QRCodeLimitLength[i][0]; break; case QRErrorCorrectLevel.M : nLimit = QRCodeLimitLength[i][1]; break; case QRErrorCorrectLevel.Q : nLimit = QRCodeLimitLength[i][2]; break; case QRErrorCorrectLevel.H : nLimit = QRCodeLimitLength[i][3]; break; } if (length <= nLimit) { break; } else { nType++; } } if (nType > QRCodeLimitLength.length) { throw new Error("Too long data"); } return nType; } function _getUTF8Length(sText) { var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a'); return replacedText.length + (replacedText.length != sText ? 3 : 0); } /** * @class QRCode * @constructor * @example * new QRCode(document.getElementById("test"), "http://jindo.dev.naver.com/collie"); * * @example * var oQRCode = new QRCode("test", { * text : "http://naver.com", * width : 128, * height : 128 * }); * * oQRCode.clear(); // Clear the QRCode. * oQRCode.makeCode("http://map.naver.com"); // Re-create the QRCode. * * @param {HTMLElement|String} el target element or 'id' attribute of element. * @param {Object|String} vOption * @param {String} vOption.text QRCode link data * @param {Number} [vOption.width=256] * @param {Number} [vOption.height=256] * @param {String} [vOption.colorDark="#000000"] * @param {String} [vOption.colorLight="#ffffff"] * @param {QRCode.CorrectLevel} [vOption.correctLevel=QRCode.CorrectLevel.H] [L|M|Q|H] */ QRCode = function (el, vOption) { this._htOption = { width : 256, height : 256, typeNumber : 4, colorDark : "#000000", colorLight : "#ffffff", correctLevel : QRErrorCorrectLevel.H }; if (typeof vOption === 'string') { vOption = { text : vOption }; } // Overwrites options if (vOption) { for (var i in vOption) { this._htOption[i] = vOption[i]; } } if (typeof el == "string") { el = document.getElementById(el); } if (this._htOption.useSVG) { Drawing = svgDrawer; } this._android = _getAndroid(); this._el = el; this._oQRCode = null; this._oDrawing = new Drawing(this._el, this._htOption); if (this._htOption.text) { this.makeCode(this._htOption.text); } }; /** * Make the QRCode * * @param {String} sText link data */ QRCode.prototype.makeCode = function (sText) { this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel); this._oQRCode.addData(sText); this._oQRCode.make(); this._el.title = sText; this._oDrawing.draw(this._oQRCode); this.makeImage(); }; /** * Make the Image from Canvas element * - It occurs automatically * - Android below 3 doesn't support Data-URI spec. * * @private */ QRCode.prototype.makeImage = function () { if (typeof this._oDrawing.makeImage == "function" && (!this._android || this._android >= 3)) { this._oDrawing.makeImage(); } }; /** * Clear the QRCode */ QRCode.prototype.clear = function () { this._oDrawing.clear(); }; /** * @name QRCode.CorrectLevel */ QRCode.CorrectLevel = QRErrorCorrectLevel; if (typeof define === 'function') { define(function() { return QRCode; }); } else if (typeof exports !== 'undefined') { module.exports = QRCode; } else { this.QRCode = QRCode; } }());
参考：
https://www.cnblogs.com/yisheng163/p/4472687.html
2.利用Jquery生成二维码并且中间有logo
一、描述
描述： jquery.qrcode.js 是一个能够在客户端生成矩阵二维码QRCode 的jquery插件，使用它可以很方便的在页面上生成二维条码。此插件是能够独立使用的，体积也比较 小，使用gzip压缩后才不到4kb。因为它是直接在客户端生成的条码， 所以不会有图片下载的过程，能够实现快速生成。它是基于一个多语言的类库封装的，也不依赖于其他额外的服务。
好处：使用jquery-qrcode的好处，不需要在服务器端生成多余的二维码图片，二维码直接通过JavaScript直接在客户端生成，有效减少带宽，以及维护成本。
首先大家可以看一下jquery.qrcode.js官网，官网上也有例子。但是官网的 jquery.qrcode.js是不支持中文的，废话不多说了，现在我们开始吧。
官网上的 qrcode.js 文件里没有实现中文的支持和LOGO的添加，现在我们将这个文件修改为jquery.qrcode.js文件了。此外还需要一个对中文进行转码的文件，该文件为 utf.js。然后在jquery.qrcode.js 文件中调用了 utf.js 文件的 utf16to8(str) 方法对其中文进行了转码。
下面是我写的一个示例，该示例需要的js文件有 jquery.qrcode.js 和 utf.js 以及 jquery-1.8.0.js 。还有一个 LOGO图片 可点击下载文件。
调用的html代码如下：
<<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta content="initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0" name="viewport"> <title>该二维码支持中文和LOGO</title> </head> <body> <center> <h2>该二维码支持中文和LOGO</h2> <div id="qrcodeCanvas"></div> </center> <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js"></script> <script type="text/javascript" src="js/utf.js"></script> <script type="text/javascript" src="js/jquery.qrcode.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#qrcodeCanvas").qrcode({ render: "canvas", //设置渲染方式，有table和canvas，使用canvas方式渲染性能相对来说比较好 text: "http://www.baidu.com", //扫描二维码后显示的内容,可以直接填一个网址，扫描二维码后自动跳向该链接 "200", //二维码的宽度 height: "200", //二维码的高度 background: "#ffffff", //二维码的后景色 foreground: "#000000", //二维码的前景色 src: 'https://img.d1xz.net/d/2016/09/57de106713afa.png' //二维码中间的图片 }); }); </script> </body>
jquery.qrcode.js文件
function QR8bitByte(a){ this.mode=QRMode.MODE_8BIT_BYTE, this.data=a } function QRCode(a,b){ this.typeNumber=a, this.errorCorrectLevel=b, this.modules=null, this.moduleCount=0, this.dataCache=null, this.dataList=new Array() } function QRPolynomial(a,b){ var c,d; if(void 0==a.length){ throw new Error(a.length+"/"+b) } for(c=0;c<a.length&&0==a[c];){ c++ } for(this.num=new Array(a.length-c+b),d=0;d<a.length-c;d++){ this.num[d]=a[d+c] } } function QRRSBlock(a,b){ this.totalCount=a, this.dataCount=b } function QRBitBuffer(){ this.buffer=new Array(), this.length=0 } var QRMode,QRErrorCorrectLevel,QRMaskPattern,QRUtil,QRMath,i; for(function(a){ a.fn.qrcode=function(b){ var c,d; return"string"==typeof b&&(b={text:b}), b=a.extend({},{ render:"canvas", 256, height:256, //这里是图片的高度和宽度 imgWidth:b.width/4.7, imgHeight:b.height/4, typeNumber:-1, correctLevel:QRErrorCorrectLevel.H, background:"#ffffff", foreground:"#000000" },b),c=function(){ var c,d,e,f,g,h,i,j,k,a=new QRCode(b.typeNumber,b.correctLevel); for(a.addData(utf16to8(b.text)),a.make(), c=document.createElement("canvas"), c.width=b.width,c.height=b.height,d=c.getContext("2d"), b.src&&(e=new Image(),e.src=b.src,e.onload=function(){ d.drawImage(e,(b.width-b.imgWidth)/2,(b.height-b.imgHeight)/2, b.imgWidth,b.imgHeight)}),f=b.width/a.getModuleCount(), g=b.height/a.getModuleCount(),h=0;h<a.getModuleCount();h++) {for(i=0;i<a.getModuleCount();i++){ d.fillStyle=a.isDark(h,i)?b.foreground:b.background, j=Math.ceil((i+1)*f)-Math.floor(i*f), k=Math.ceil((h+1)*f)-Math.floor(h*f), d.fillRect(Math.round(i*f),Math.round(h*g),j,k) }}return c}, d=function(){var d,e,f,g,h,i, c=new QRCode(b.typeNumber,b.correctLevel); //这里的utf16to8(b.text)是对Text中的字符串进行转码，让其支持中文 for(c.addData(utf16to8(b.text)),c.make(),d=a("<table></table>").css("width",b.width+"px").css("height",b.height+"px").css("border","0px").css("border-collapse","collapse").css("background-color",b.background),e=b.width/c.getModuleCount(),f=b.height/c.getModuleCount(),g=0;g<c.getModuleCount();g++){for(h=a("<tr></tr>").css("height",f+"px").appendTo(d),i=0;i<c.getModuleCount();i++){a("<td></td>").css("width",e+"px").css("background-color",c.isDark(g,i)?b.foreground:b.background).appendTo(h)}}return d},this.each(function(){var e="canvas"==b.render?c():d();a(e).appendTo(this)})}}(jQuery),QR8bitByte.prototype={getLength:function(){return this.data.length},write:function(a){for(var b=0;b<this.data.length;b++){a.put(this.data.charCodeAt(b),8)}}},QRCode.prototype={addData:function(a){var b=new QR8bitByte(a);this.dataList.push(b),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(){var a,b,c,d,e,f;if(this.typeNumber<1){for(a=1,a=1;40>a;a++){for(b=QRRSBlock.getRSBlocks(a,this.errorCorrectLevel),c=new QRBitBuffer(),d=0,e=0;e<b.length;e++){d+=b[e].dataCount}for(e=0;e<this.dataList.length;e++){f=this.dataList[e],c.put(f.mode,4),c.put(f.getLength(),QRUtil.getLengthInBits(f.mode,a)),f.write(c)}if(c.getLengthInBits()<=8*d){break}}this.typeNumber=a}this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(a,b){var c,d;for(this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount),c=0;c<this.moduleCount;c++){for(this.modules[c]=new Array(this.moduleCount),d=0;d<this.moduleCount;d++){this.modules[c][d]=null}}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(a,b),this.typeNumber>=7&&this.setupTypeNumber(a),null==this.dataCache&&(this.dataCache=QRCode.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,b)},setupPositionProbePattern:function(a,b){var c,d;for(c=-1;7>=c;c++){if(!(-1>=a+c||this.moduleCount<=a+c)){for(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(){var c,d,a=0,b=0;for(c=0;8>c;c++){this.makeImpl(!0,c),d=QRUtil.getLostPoint(this),(0==c||a>d)&&(a=d,b=c)}return b},createMovieClip:function(a,b,c){var f,g,h,i,j,d=a.createEmptyMovieClip(b,c),e=1;for(this.make(),f=0;f<this.modules.length;f++){for(g=f*e,h=0;h<this.modules[f].length;h++){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(){var a,b;for(a=8;a<this.moduleCount-8;a++){null==this.modules[a][6]&&(this.modules[a][6]=0==a%2)}for(b=8;b<this.moduleCount-8;b++){null==this.modules[6][b]&&(this.modules[6][b]=0==b%2)}},setupPositionAdjustPattern:function(){var b,c,d,e,f,g,a=QRUtil.getPatternPosition(this.typeNumber);for(b=0;b<a.length;b++){for(c=0;c<a.length;c++){if(d=a[b],e=a[c],null==this.modules[d][e]){for(f=-2;2>=f;f++){for(g=-2;2>=g;g++){this.modules[d+f][e+g]=-2==f||2==f||-2==g||2==g||0==f&&0==g?!0:!1}}}}}},setupTypeNumber:function(a){var c,d,b=QRUtil.getBCHTypeNumber(this.typeNumber);for(c=0;18>c;c++){d=!a&&1==(1&b>>c),this.modules[Math.floor(c/3)][c%3+this.moduleCount-8-3]=d}for(c=0;18>c;c++){d=!a&&1==(1&b>>c),this.modules[c%3+this.moduleCount-8-3][Math.floor(c/3)]=d}},setupTypeInfo:function(a,b){var e,f,c=this.errorCorrectLevel<<3|b,d=QRUtil.getBCHTypeInfo(c);for(e=0;15>e;e++){f=!a&&1==(1&d>>e),6>e?this.modules[e][8]=f:8>e?this.modules[e+1][8]=f:this.modules[this.moduleCount-15+e][8]=f}for(e=0;15>e;e++){f=!a&&1==(1&d>>e),8>e?this.modules[8][this.moduleCount-e-1]=f:9>e?this.modules[8][15-e-1+1]=f:this.modules[8][15-e-1]=f}this.modules[this.moduleCount-8][8]=!a},mapData:function(a,b){var g,h,i,j,c=-1,d=this.moduleCount-1,e=7,f=0;for(g=this.moduleCount-1;g>0;g-=2){for(6==g&&g--;;){for(h=0;2>h;h++){null==this.modules[d][g-h]&&(i=!1,f<a.length&&(i=1==(1&a[f]>>>e)),j=QRUtil.getMask(b,d,g-h),j&&(i=!i),this.modules[d][g-h]=i,e--,-1==e&&(f++,e=7))}if(d+=c,0>d||this.moduleCount<=d){d-=c,c=-c;break}}}}},QRCode.PAD0=236,QRCode.PAD1=17,QRCode.createData=function(a,b,c){var f,g,h,d=QRRSBlock.getRSBlocks(a,b),e=new QRBitBuffer();for(f=0;f<c.length;f++){g=c[f],e.put(g.mode,4),e.put(g.getLength(),QRUtil.getLengthInBits(g.mode,a)),g.write(e)}for(h=0,f=0;f<d.length;f++){h+=d[f].dataCount}if(e.getLengthInBits()>8*h){throw new Error("code length overflow. ("+e.getLengthInBits()+">"+8*h+")")}for(e.getLengthInBits()+4<=8*h&&e.put(0,4);0!=e.getLengthInBits()%8;){e.putBit(!1)}for(;;){if(e.getLengthInBits()>=8*h){break}if(e.put(QRCode.PAD0,8),e.getLengthInBits()>=8*h){break}e.put(QRCode.PAD1,8)}return QRCode.createBytes(e,d)},QRCode.createBytes=function(a,b){var h,i,j,k,l,m,n,o,p,q,r,c=0,d=0,e=0,f=new Array(b.length),g=new Array(b.length);for(h=0;h<b.length;h++){for(i=b[h].dataCount,j=b[h].totalCount-i,d=Math.max(d,i),e=Math.max(e,j),f[h]=new Array(i),k=0;k<f[h].length;k++){f[h][k]=255&a.buffer[k+c]}for(c+=i,l=QRUtil.getErrorCorrectPolynomial(j),m=new QRPolynomial(f[h],l.getLength()-1),n=m.mod(l),g[h]=new Array(l.getLength()-1),k=0;k<g[h].length;k++){o=k+n.getLength()-g[h].length,g[h][k]=o>=0?n.get(o):0}}for(p=0,k=0;k<b.length;k++){p+=b[k].totalCount}for(q=new Array(p),r=0,k=0;d>k;k++){for(h=0;h<b.length;h++){k<f[h].length&&(q[r++]=f[h][k])}}for(k=0;e>k;k++){for(h=0;h<b.length;h++){k<g[h].length&&(q[r++]=g[h][k])}}return q},QRMode={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},QRErrorCorrectLevel={L:1,M:0,Q:3,H:2},QRMaskPattern={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7},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]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(a){for(var b=a<<10;QRUtil.getBCHDigit(b)-QRUtil.getBCHDigit(QRUtil.G15)>=0;){b^=QRUtil.G15<<QRUtil.getBCHDigit(b)-QRUtil.getBCHDigit(QRUtil.G15)}return(a<<10|b)^QRUtil.G15_MASK},getBCHTypeNumber:function(a){for(var b=a<<12;QRUtil.getBCHDigit(b)-QRUtil.getBCHDigit(QRUtil.G18)>=0;){b^=QRUtil.G18<<QRUtil.getBCHDigit(b)-QRUtil.getBCHDigit(QRUtil.G18)}return a<<12|b},getBCHDigit:function(a){for(var b=0;0!=a;){b++,a>>>=1}return b},getPatternPosition:function(a){return QRUtil.PATTERN_POSITION_TABLE[a-1]},getMask:function(a,b,c){switch(a){case QRMaskPattern.PATTERN000:return 0==(b+c)%2;case QRMaskPattern.PATTERN001:return 0==b%2;case QRMaskPattern.PATTERN010:return 0==c%3;case QRMaskPattern.PATTERN011:return 0==(b+c)%3;case QRMaskPattern.PATTERN100:return 0==(Math.floor(b/2)+Math.floor(c/3))%2;case QRMaskPattern.PATTERN101:return 0==b*c%2+b*c%3;case QRMaskPattern.PATTERN110:return 0==(b*c%2+b*c%3)%2;case QRMaskPattern.PATTERN111:return 0==(b*c%3+(b+c)%2)%2;default:throw new Error("bad maskPattern:"+a)}},getErrorCorrectPolynomial:function(a){var c,b=new QRPolynomial([1],0);for(c=0;a>c;c++){b=b.multiply(new QRPolynomial([1,QRMath.gexp(c)],0))}return b},getLengthInBits:function(a,b){if(b>=1&&10>b){switch(a){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:"+a)}}else{if(27>b){switch(a){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:"+a)}}else{if(!(41>b)){throw new Error("type:"+b)}switch(a){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:"+a)}}}},getLostPoint:function(a){var d,e,f,g,h,i,j,k,l,b=a.getModuleCount(),c=0;for(d=0;b>d;d++){for(e=0;b>e;e++){for(f=0,g=a.isDark(d,e),h=-1;1>=h;h++){if(!(0>d+h||d+h>=b)){for(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(d=0;b-1>d;d++){for(e=0;b-1>e;e++){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(d=0;b>d;d++){for(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(e=0;b>e;e++){for(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(k=0,e=0;b>e;e++){for(d=0;b>d;d++){a.isDark(d,e)&&k++}}return l=Math.abs(100*k/b/b-50)/5,c+=10*l}},QRMath={glog:function(a){if(1>a){throw new Error("glog("+a+")")}return QRMath.LOG_TABLE[a]},gexp:function(a){for(;0>a;){a+=255}for(;a>=256;){a-=255}return QRMath.EXP_TABLE[a]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},i=0;8>i;i++){QRMath.EXP_TABLE[i]=1<<i}for(i=8;256>i;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(i=0;255>i;i++){QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]]=i}QRPolynomial.prototype={get:function(a){return this.num[a]},getLength:function(){return this.num.length},multiply:function(a){var c,d,b=new Array(this.getLength()+a.getLength()-1);for(c=0;c<this.getLength();c++){for(d=0;d<a.getLength();d++){b[c+d]^=QRMath.gexp(QRMath.glog(this.get(c))+QRMath.glog(a.get(d)))}}return new QRPolynomial(b,0)},mod:function(a){var b,c,d;if(this.getLength()-a.getLength()<0){return this}for(b=QRMath.glog(this.get(0))-QRMath.glog(a.get(0)),c=new Array(this.getLength()),d=0;d<this.getLength();d++){c[d]=this.get(d)}for(d=0;d<a.getLength();d++){c[d]^=QRMath.gexp(QRMath.glog(a.get(d))+b)}return new QRPolynomial(c,0).mod(a)}},QRRSBlock.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]],QRRSBlock.getRSBlocks=function(a,b){var d,e,f,g,h,i,j,c=QRRSBlock.getRsBlockTable(a,b);if(void 0==c){throw new Error("bad rs block @ typeNumber:"+a+"/errorCorrectLevel:"+b)}for(d=c.length/3,e=new Array(),f=0;d>f;f++){for(g=c[3*f+0],h=c[3*f+1],i=c[3*f+2],j=0;g>j;j++){e.push(new QRRSBlock(h,i))}}return e},QRRSBlock.getRsBlockTable=function(a,b){switch(b){case QRErrorCorrectLevel.L:return QRRSBlock.RS_BLOCK_TABLE[4*(a-1)+0];case QRErrorCorrectLevel.M:return QRRSBlock.RS_BLOCK_TABLE[4*(a-1)+1];case QRErrorCorrectLevel.Q:return QRRSBlock.RS_BLOCK_TABLE[4*(a-1)+2];case QRErrorCorrectLevel.H:return QRRSBlock.RS_BLOCK_TABLE[4*(a-1)+3];default:return void 0}},QRBitBuffer.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++}};
utf.js文件：
/* utf.js - UTF-8 <=> UTF-16 convertion * * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp> * Version: 1.0 * LastModified: Dec 25 1999 * This library is free. You can redistribute it and/or modify it. */ /* * Interfaces: * utf8 = utf16to8(utf16); * utf16 = utf16to8(utf8); */ function utf16to8(str) { var out, i, len, c; out = ""; len = str.length; for(i = 0; i < len; i++) { c = str.charCodeAt(i); if ((c >= 0x0001) && (c <= 0x007F)) { out += str.charAt(i); } else if (c > 0x07FF) { out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F)); out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } else { out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } } return out; } function utf8to16(str) { var out, i, len, c; var char2, char3; out = ""; len = str.length; i = 0; while(i < len) { c = str.charCodeAt(i++); switch(c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: // 0xxxxxxx out += str.charAt(i-1); break; case 12: case 13: // 110x xxxx 10xx xxxx char2 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); break; case 14: // 1110 xxxx 10xx xxxx 10xx xxxx char2 = str.charCodeAt(i++); char3 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); break; } } return out; }
效果图：
参考：https://blog.csdn.net/zbw18297786698/article/details/52819173
3.参考https://github.com/qinyuanqiu/qrcode
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title></title> </head> <body> <div class="qrcode"><img style="display: none;" src="/qrcode/img/jiwang.png"/></div> </body> <script src="js/jquery.min.js" type="text/javascript" charset="utf-8"></script> <script src="js/qrcode.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> $('.qrcode').qrcode({ render: 'image',//canvas,image,div 生成的元素 minVersion: 7,//1-40 花格密度 ecLevel: 'H',//'L', 'M', 'Q' or 'H' 精准度 left: 0,// 二维码相对父元素的偏移 top: 0,// 二维码相对父元素的偏移 size: 300,// 二维码尺寸 fill: '#000',// 花格的填充色 background: null,// 二维码背景 text: 'qrcode',// 二维码内容 radius: 0.1,//0.0 .. 0.5 花格圆角 quiet: 2, //二维码外边距 mode: 4,//内嵌模式 // 0: 无内嵌内容 // 1: 内嵌横排文字（中间截断） // 2: 内嵌横排文字（中间不截断） // 3: 内嵌横排图片（中间截断） // 4: 内嵌图片盒子 （居中） mSize: 0.2,//内嵌尺寸 mPosX: 0.5,//内嵌位置偏移量 mPosY: 0.5,//内嵌位置偏移量 label: '内嵌文字', fontname: '楷体',//内嵌文字字体 fontcolor: '#fa9863',//内嵌文字颜色 image: $('.qrcode img')[0]//图片元素(不能使用外联) }); </script> </html>
未压缩qrcode.js代码：
/*! jquery-qrcode v0.14.0 - https://larsjung.de/jquery-qrcode/ */ (function (vendor_qrcode) { 'use strict'; var jq = window.jQuery; // Check if canvas is available in the browser (as Modernizr does) var hasCanvas = (function () { var elem = document.createElement('canvas'); return !!(elem.getContext && elem.getContext('2d')); }()); // Wrapper for the original QR code generator. function createQRCode(text, level, version, quiet) { var qr = {}; var vqr = vendor_qrcode(version, level); vqr.addData(text); vqr.make(); quiet = quiet || 0; var qrModuleCount = vqr.getModuleCount(); var quietModuleCount = vqr.getModuleCount() + 2 * quiet; function isDark(row, col) { row -= quiet; col -= quiet; if (row < 0 || row >= qrModuleCount || col < 0 || col >= qrModuleCount) { return false; } return vqr.isDark(row, col); } function addBlank(l, t, r, b) { var prevIsDark = qr.isDark; var moduleSize = 1 / quietModuleCount; qr.isDark = function (row, col) { var ml = col * moduleSize; var mt = row * moduleSize; var mr = ml + moduleSize; var mb = mt + moduleSize; return prevIsDark(row, col) && (l > mr || ml > r || t > mb || mt > b); }; } qr.text = text; qr.level = level; qr.version = version; qr.moduleCount = quietModuleCount; qr.isDark = isDark; qr.addBlank = addBlank; return qr; } // Returns a minimal QR code for the given text starting with version `minVersion`. // Returns `undefined` if `text` is too long to be encoded in `maxVersion`. function createMinQRCode(text, level, minVersion, maxVersion, quiet) { minVersion = Math.max(1, minVersion || 1); maxVersion = Math.min(40, maxVersion || 40); for (var version = minVersion; version <= maxVersion; version += 1) { try { return createQRCode(text, level, version, quiet); } catch (err) {/* empty */} } return undefined; } function drawBackgroundLabel(qr, context, settings) { var size = settings.size; var font = 'bold ' + settings.mSize * size + 'px ' + settings.fontname; var ctx = jq('<canvas/>')[0].getContext('2d'); ctx.font = font; var w = ctx.measureText(settings.label).width; var sh = settings.mSize; var sw = w / size; var sl = (1 - sw) * settings.mPosX; var st = (1 - sh) * settings.mPosY; var sr = sl + sw; var sb = st + sh; var pad = 0.01; if (settings.mode === 1) { // Strip qr.addBlank(0, st - pad, size, sb + pad); } else { // Box qr.addBlank(sl - pad, st - pad, sr + pad, sb + pad); } context.fillStyle = settings.fontcolor; context.font = font; context.fillText(settings.label, sl * size, st * size + 0.75 * settings.mSize * size); } function drawBackgroundImage(qr, context, settings) { var size = settings.size; var w = settings.image.naturalWidth || 1; var h = settings.image.naturalHeight || 1; var sh = settings.mSize; var sw = sh * w / h; var sl = (1 - sw) * settings.mPosX; var st = (1 - sh) * settings.mPosY; var sr = sl + sw; var sb = st + sh; var pad = 0.01; if (settings.mode === 3) { // Strip qr.addBlank(0, st - pad, size, sb + pad); } else { // Box qr.addBlank(sl - pad, st - pad, sr + pad, sb + pad); } context.drawImage(settings.image, sl * size, st * size, sw * size, sh * size); } function drawBackground(qr, context, settings) { if (jq(settings.background).is('img')) { context.drawImage(settings.background, 0, 0, settings.size, settings.size); } else if (settings.background) { context.fillStyle = settings.background; context.fillRect(settings.left, settings.top, settings.size, settings.size); } var mode = settings.mode; if (mode === 1 || mode === 2) { drawBackgroundLabel(qr, context, settings); } else if (mode === 3 || mode === 4) { drawBackgroundImage(qr, context, settings); } } function drawModuleDefault(qr, context, settings, left, top, width, row, col) { if (qr.isDark(row, col)) { context.rect(left, top, width, width); } } function drawModuleRoundedDark(ctx, l, t, r, b, rad, nw, ne, se, sw) { if (nw) { ctx.moveTo(l + rad, t); } else { ctx.moveTo(l, t); } if (ne) { ctx.lineTo(r - rad, t); ctx.arcTo(r, t, r, b, rad); } else { ctx.lineTo(r, t); } if (se) { ctx.lineTo(r, b - rad); ctx.arcTo(r, b, l, b, rad); } else { ctx.lineTo(r, b); } if (sw) { ctx.lineTo(l + rad, b); ctx.arcTo(l, b, l, t, rad); } else { ctx.lineTo(l, b); } if (nw) { ctx.lineTo(l, t + rad); ctx.arcTo(l, t, r, t, rad); } else { ctx.lineTo(l, t); } } function drawModuleRoundendLight(ctx, l, t, r, b, rad, nw, ne, se, sw) { if (nw) { ctx.moveTo(l + rad, t); ctx.lineTo(l, t); ctx.lineTo(l, t + rad); ctx.arcTo(l, t, l + rad, t, rad); } if (ne) { ctx.moveTo(r - rad, t); ctx.lineTo(r, t); ctx.lineTo(r, t + rad); ctx.arcTo(r, t, r - rad, t, rad); } if (se) { ctx.moveTo(r - rad, b); ctx.lineTo(r, b); ctx.lineTo(r, b - rad); ctx.arcTo(r, b, r - rad, b, rad); } if (sw) { ctx.moveTo(l + rad, b); ctx.lineTo(l, b); ctx.lineTo(l, b - rad); ctx.arcTo(l, b, l + rad, b, rad); } } function drawModuleRounded(qr, context, settings, left, top, width, row, col) { var isDark = qr.isDark; var right = left + width; var bottom = top + width; var radius = settings.radius * width; var rowT = row - 1; var rowB = row + 1; var colL = col - 1; var colR = col + 1; var center = isDark(row, col); var northwest = isDark(rowT, colL); var north = isDark(rowT, col); var northeast = isDark(rowT, colR); var east = isDark(row, colR); var southeast = isDark(rowB, colR); var south = isDark(rowB, col); var southwest = isDark(rowB, colL); var west = isDark(row, colL); if (center) { drawModuleRoundedDark(context, left, top, right, bottom, radius, !north && !west, !north && !east, !south && !east, !south && !west); } else { drawModuleRoundendLight(context, left, top, right, bottom, radius, north && west && northwest, north && east && northeast, south && east && southeast, south && west && southwest); } } function drawModules(qr, context, settings) { var moduleCount = qr.moduleCount; var moduleSize = settings.size / moduleCount; var fn = drawModuleDefault; var row; var col; if (settings.radius > 0 && settings.radius <= 0.5) { fn = drawModuleRounded; } context.beginPath(); for (row = 0; row < moduleCount; row += 1) { for (col = 0; col < moduleCount; col += 1) { var l = settings.left + col * moduleSize; var t = settings.top + row * moduleSize; var w = moduleSize; fn(qr, context, settings, l, t, w, row, col); } } if (jq(settings.fill).is('img')) { context.strokeStyle = 'rgba(0,0,0,0.5)'; context.lineWidth = 2; context.stroke(); var prev = context.globalCompositeOperation; context.globalCompositeOperation = 'destination-out'; context.fill(); context.globalCompositeOperation = prev; context.clip(); context.drawImage(settings.fill, 0, 0, settings.size, settings.size); context.restore(); } else { context.fillStyle = settings.fill; context.fill(); } } // Draws QR code to the given `canvas` and returns it. function drawOnCanvas(canvas, settings) { var qr = createMinQRCode(settings.text, settings.ecLevel, settings.minVersion, settings.maxVersion, settings.quiet); if (!qr) { return null; } var $canvas = jq(canvas).data('qrcode', qr); var context = $canvas[0].getContext('2d'); drawBackground(qr, context, settings); drawModules(qr, context, settings); return $canvas; } // Returns a `canvas` element representing the QR code for the given settings. function createCanvas(settings) { var $canvas = jq('<canvas/>').attr('width', settings.size).attr('height', settings.size); return drawOnCanvas($canvas, settings); } // Returns an `image` element representing the QR code for the given settings. function createImage(settings) { return jq('<img/>').attr('src', createCanvas(settings)[0].toDataURL('image/png')); } // Returns a `div` element representing the QR code for the given settings. function createDiv(settings) { var qr = createMinQRCode(settings.text, settings.ecLevel, settings.minVersion, settings.maxVersion, settings.quiet); if (!qr) { return null; } // some shortcuts to improve compression var settings_size = settings.size; var settings_bgColor = settings.background; var math_floor = Math.floor; var moduleCount = qr.moduleCount; var moduleSize = math_floor(settings_size / moduleCount); var offset = math_floor(0.5 * (settings_size - moduleSize * moduleCount)); var row; var col; var containerCSS = { position: 'relative', left: 0, top: 0, padding: 0, margin: 0, settings_size, height: settings_size }; var darkCSS = { position: 'absolute', padding: 0, margin: 0, moduleSize, height: moduleSize, 'background-color': settings.fill }; var $div = jq('<div/>').data('qrcode', qr).css(containerCSS); if (settings_bgColor) { $div.css('background-color', settings_bgColor); } for (row = 0; row < moduleCount; row += 1) { for (col = 0; col < moduleCount; col += 1) { if (qr.isDark(row, col)) { jq('<div/>') .css(darkCSS) .css({ left: offset + col * moduleSize, top: offset + row * moduleSize }) .appendTo($div); } } } return $div; } function createHTML(settings) { if (hasCanvas && settings.render === 'canvas') { return createCanvas(settings); } else if (hasCanvas && settings.render === 'image') { return createImage(settings); } return createDiv(settings); } // Plugin // ====== // Default settings // ---------------- var defaults = { // render method: `'canvas'`, `'image'` or `'div'` render: 'canvas', // version range somewhere in 1 .. 40 minVersion: 1, maxVersion: 40, // error correction level: `'L'`, `'M'`, `'Q'` or `'H'` ecLevel: 'L', // offset in pixel if drawn onto existing canvas left: 0, top: 0, // size in pixel size: 200, // code color or image element fill: '#000', // background color or image element, `null` for transparent background background: null, // content text: 'no text', // corner radius relative to module 0.0 .. 0.5 radius: 0, // quiet zone in modules quiet: 0, // modes // 0: normal // 1: label strip // 2: label box // 3: image strip // 4: image box mode: 0, mSize: 0.1, mPosX: 0.5, mPosY: 0.5, label: 'no label', fontname: 'sans', fontcolor: '#000', image: null }; // Register the plugin // ------------------- jq.fn.qrcode = function (options) { var settings = jq.extend({}, defaults, options); return this.each(function (idx, el) { if (el.nodeName.toLowerCase() === 'canvas') { drawOnCanvas(el, settings); } else { jq(el).append(createHTML(settings)); } }); }; }(function () { // `qrcode` is the single public function defined by the `QR Code Generator` //--------------------------------------------------------------------- // // QR Code Generator for JavaScript // // Copyright (c) 2009 Kazuhiko Arase // // URL: http://www.d-project.com/ // // Licensed under the MIT license: // http://www.opensource.org/licenses/mit-license.php // // The word 'QR Code' is registered trademark of // DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/faqpatent-e.html // //--------------------------------------------------------------------- var qrcode = function() { //--------------------------------------------------------------------- // qrcode //--------------------------------------------------------------------- /** * qrcode * @param typeNumber 1 to 40 * @param errorCorrectLevel 'L','M','Q','H' */ var qrcode = function(typeNumber, errorCorrectLevel) { var PAD0 = 0xEC; var PAD1 = 0x11; var _typeNumber = typeNumber; var _errorCorrectLevel = QRErrorCorrectLevel[errorCorrectLevel]; var _modules = null; var _moduleCount = 0; var _dataCache = null; var _dataList = new Array(); var _this = {}; var makeImpl = function(test, maskPattern) { _moduleCount = _typeNumber * 4 + 17; _modules = function(moduleCount) { var modules = new Array(moduleCount); for (var row = 0; row < moduleCount; row += 1) { modules[row] = new Array(moduleCount); for (var col = 0; col < moduleCount; col += 1) { modules[row][col] = null; } } return modules; }(_moduleCount); setupPositionProbePattern(0, 0); setupPositionProbePattern(_moduleCount - 7, 0); setupPositionProbePattern(0, _moduleCount - 7); setupPositionAdjustPattern(); setupTimingPattern(); setupTypeInfo(test, maskPattern); if (_typeNumber >= 7) { setupTypeNumber(test); } if (_dataCache == null) { _dataCache = createData(_typeNumber, _errorCorrectLevel, _dataList); } mapData(_dataCache, maskPattern); }; var setupPositionProbePattern = function(row, col) { for (var r = -1; r <= 7; r += 1) { if (row + r <= -1 || _moduleCount <= row + r) continue; for (var c = -1; c <= 7; c += 1) { if (col + c <= -1 || _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) ) { _modules[row + r][col + c] = true; } else { _modules[row + r][col + c] = false; } } } }; var getBestMaskPattern = function() { var minLostPoint = 0; var pattern = 0; for (var i = 0; i < 8; i += 1) { makeImpl(true, i); var lostPoint = QRUtil.getLostPoint(_this); if (i == 0 || minLostPoint > lostPoint) { minLostPoint = lostPoint; pattern = i; } } return pattern; }; var setupTimingPattern = function() { for (var r = 8; r < _moduleCount - 8; r += 1) { if (_modules[r][6] != null) { continue; } _modules[r][6] = (r % 2 == 0); } for (var c = 8; c < _moduleCount - 8; c += 1) { if (_modules[6][c] != null) { continue; } _modules[6][c] = (c % 2 == 0); } }; var setupPositionAdjustPattern = function() { var pos = QRUtil.getPatternPosition(_typeNumber); for (var i = 0; i < pos.length; i += 1) { for (var j = 0; j < pos.length; j += 1) { var row = pos[i]; var col = pos[j]; if (_modules[row][col] != null) { continue; } for (var r = -2; r <= 2; r += 1) { for (var c = -2; c <= 2; c += 1) { if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0) ) { _modules[row + r][col + c] = true; } else { _modules[row + r][col + c] = false; } } } } } }; var setupTypeNumber = function(test) { var bits = QRUtil.getBCHTypeNumber(_typeNumber); for (var i = 0; i < 18; i += 1) { var mod = (!test && ( (bits >> i) & 1) == 1); _modules[Math.floor(i / 3)][i % 3 + _moduleCount - 8 - 3] = mod; } for (var i = 0; i < 18; i += 1) { var mod = (!test && ( (bits >> i) & 1) == 1); _modules[i % 3 + _moduleCount - 8 - 3][Math.floor(i / 3)] = mod; } }; var setupTypeInfo = function(test, maskPattern) { var data = (_errorCorrectLevel << 3) | maskPattern; var bits = QRUtil.getBCHTypeInfo(data); // vertical for (var i = 0; i < 15; i += 1) { var mod = (!test && ( (bits >> i) & 1) == 1); if (i < 6) { _modules[i][8] = mod; } else if (i < 8) { _modules[i + 1][8] = mod; } else { _modules[_moduleCount - 15 + i][8] = mod; } } // horizontal for (var i = 0; i < 15; i += 1) { var mod = (!test && ( (bits >> i) & 1) == 1); if (i < 8) { _modules[8][_moduleCount - i - 1] = mod; } else if (i < 9) { _modules[8][15 - i - 1 + 1] = mod; } else { _modules[8][15 - i - 1] = mod; } } // fixed module _modules[_moduleCount - 8][8] = (!test); }; var mapData = function(data, maskPattern) { var inc = -1; var row = _moduleCount - 1; var bitIndex = 7; var byteIndex = 0; var maskFunc = QRUtil.getMaskFunction(maskPattern); for (var col = _moduleCount - 1; col > 0; col -= 2) { if (col == 6) col -= 1; while (true) { for (var c = 0; c < 2; c += 1) { if (_modules[row][col - c] == null) { var dark = false; if (byteIndex < data.length) { dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1); } var mask = maskFunc(row, col - c); if (mask) { dark = !dark; } _modules[row][col - c] = dark; bitIndex -= 1; if (bitIndex == -1) { byteIndex += 1; bitIndex = 7; } } } row += inc; if (row < 0 || _moduleCount <= row) { row -= inc; inc = -inc; break; } } } }; var 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 += 1) { 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 += 1) { dcdata[r][i] = 0xff & buffer.getBuffer()[i + offset]; } offset += dcCount; var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount); var rawPoly = 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 += 1) { var modIndex = i + modPoly.getLength() - ecdata[r].length; ecdata[r][i] = (modIndex >= 0)? modPoly.getAt(modIndex) : 0; } } var totalCodeCount = 0; for (var i = 0; i < rsBlocks.length; i += 1) { totalCodeCount += rsBlocks[i].totalCount; } var data = new Array(totalCodeCount); var index = 0; for (var i = 0; i < maxDcCount; i += 1) { for (var r = 0; r < rsBlocks.length; r += 1) { if (i < dcdata[r].length) { data[index] = dcdata[r][i]; index += 1; } } } for (var i = 0; i < maxEcCount; i += 1) { for (var r = 0; r < rsBlocks.length; r += 1) { if (i < ecdata[r].length) { data[index] = ecdata[r][i]; index += 1; } } } return data; }; var createData = function(typeNumber, errorCorrectLevel, dataList) { var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel); var buffer = qrBitBuffer(); for (var i = 0; i < dataList.length; i += 1) { var data = dataList[i]; buffer.put(data.getMode(), 4); buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber) ); data.write(buffer); } // calc num max data. var totalDataCount = 0; for (var i = 0; i < rsBlocks.length; i += 1) { 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(PAD0, 8); if (buffer.getLengthInBits() >= totalDataCount * 8) { break; } buffer.put(PAD1, 8); } return createBytes(buffer, rsBlocks); }; _this.addData = function(data) { var newData = qr8BitByte(data); _dataList.push(newData); _dataCache = null; }; _this.isDark = function(row, col) { if (row < 0 || _moduleCount <= row || col < 0 || _moduleCount <= col) { throw new Error(row + ',' + col); } return _modules[row][col]; }; _this.getModuleCount = function() { return _moduleCount; }; _this.make = function() { makeImpl(false, getBestMaskPattern() ); }; _this.createTableTag = function(cellSize, margin) { cellSize = cellSize || 2; margin = (typeof margin == 'undefined')? cellSize * 4 : margin; var qrHtml = ''; qrHtml += '<table style="'; qrHtml += ' border- 0px; border-style: none;'; qrHtml += ' border-collapse: collapse;'; qrHtml += ' padding: 0px; margin: ' + margin + 'px;'; qrHtml += '">'; qrHtml += '<tbody>'; for (var r = 0; r < _this.getModuleCount(); r += 1) { qrHtml += '<tr>'; for (var c = 0; c < _this.getModuleCount(); c += 1) { qrHtml += '<td style="'; qrHtml += ' border- 0px; border-style: none;'; qrHtml += ' border-collapse: collapse;'; qrHtml += ' padding: 0px; margin: 0px;'; qrHtml += ' ' + cellSize + 'px;'; qrHtml += ' height: ' + cellSize + 'px;'; qrHtml += ' background-color: '; qrHtml += _this.isDark(r, c)? '#000000' : '#ffffff'; qrHtml += ';'; qrHtml += '"/>'; } qrHtml += '</tr>'; } qrHtml += '</tbody>'; qrHtml += '</table>'; return qrHtml; }; _this.createImgTag = function(cellSize, margin) { cellSize = cellSize || 2; margin = (typeof margin == 'undefined')? cellSize * 4 : margin; var size = _this.getModuleCount() * cellSize + margin * 2; var min = margin; var max = size - margin; return createImgTag(size, size, function(x, y) { if (min <= x && x < max && min <= y && y < max) { var c = Math.floor( (x - min) / cellSize); var r = Math.floor( (y - min) / cellSize); return _this.isDark(r, c)? 0 : 1; } else { return 1; } } ); }; return _this; }; //--------------------------------------------------------------------- // qrcode.stringToBytes //--------------------------------------------------------------------- qrcode.stringToBytes = function(s) { var bytes = new Array(); for (var i = 0; i < s.length; i += 1) { var c = s.charCodeAt(i); bytes.push(c & 0xff); } return bytes; }; //--------------------------------------------------------------------- // qrcode.createStringToBytes //--------------------------------------------------------------------- /** * @param unicodeData base64 string of byte array. * [16bit Unicode],[16bit Bytes], ... * @param numChars */ qrcode.createStringToBytes = function(unicodeData, numChars) { // create conversion map. var unicodeMap = function() { var bin = base64DecodeInputStream(unicodeData); var read = function() { var b = bin.read(); if (b == -1) throw new Error(); return b; }; var count = 0; var unicodeMap = {}; while (true) { var b0 = bin.read(); if (b0 == -1) break; var b1 = read(); var b2 = read(); var b3 = read(); var k = String.fromCharCode( (b0 << 8) | b1); var v = (b2 << 8) | b3; unicodeMap[k] = v; count += 1; } if (count != numChars) { throw new Error(count + ' != ' + numChars); } return unicodeMap; }(); var unknownChar = '?'.charCodeAt(0); return function(s) { var bytes = new Array(); for (var i = 0; i < s.length; i += 1) { var c = s.charCodeAt(i); if (c < 128) { bytes.push(c); } else { var b = unicodeMap[s.charAt(i)]; if (typeof b == 'number') { if ( (b & 0xff) == b) { // 1byte bytes.push(b); } else { // 2bytes bytes.push(b >>> 8); bytes.push(b & 0xff); } } else { bytes.push(unknownChar); } } } return bytes; }; }; //--------------------------------------------------------------------- // 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 = function() { var 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] ]; var G15 = (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0); var G18 = (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0); var G15_MASK = (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1); var _this = {}; var getBCHDigit = function(data) { var digit = 0; while (data != 0) { digit += 1; data >>>= 1; } return digit; }; _this.getBCHTypeInfo = function(data) { var d = data << 10; while (getBCHDigit(d) - getBCHDigit(G15) >= 0) { d ^= (G15 << (getBCHDigit(d) - getBCHDigit(G15) ) ); } return ( (data << 10) | d) ^ G15_MASK; }; _this.getBCHTypeNumber = function(data) { var d = data << 12; while (getBCHDigit(d) - getBCHDigit(G18) >= 0) { d ^= (G18 << (getBCHDigit(d) - getBCHDigit(G18) ) ); } return (data << 12) | d; }; _this.getPatternPosition = function(typeNumber) { return PATTERN_POSITION_TABLE[typeNumber - 1]; }; _this.getMaskFunction = function(maskPattern) { switch (maskPattern) { case QRMaskPattern.PATTERN000 : return function(i, j) { return (i + j) % 2 == 0; }; case QRMaskPattern.PATTERN001 : return function(i, j) { return i % 2 == 0; }; case QRMaskPattern.PATTERN010 : return function(i, j) { return j % 3 == 0; }; case QRMaskPattern.PATTERN011 : return function(i, j) { return (i + j) % 3 == 0; }; case QRMaskPattern.PATTERN100 : return function(i, j) { return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0; }; case QRMaskPattern.PATTERN101 : return function(i, j) { return (i * j) % 2 + (i * j) % 3 == 0; }; case QRMaskPattern.PATTERN110 : return function(i, j) { return ( (i * j) % 2 + (i * j) % 3) % 2 == 0; }; case QRMaskPattern.PATTERN111 : return function(i, j) { return ( (i * j) % 3 + (i + j) % 2) % 2 == 0; }; default : throw new Error('bad maskPattern:' + maskPattern); } }; _this.getErrorCorrectPolynomial = function(errorCorrectLength) { var a = qrPolynomial([1], 0); for (var i = 0; i < errorCorrectLength; i += 1) { a = a.multiply(qrPolynomial([1, QRMath.gexp(i)], 0) ); } return a; }; _this.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); } }; _this.getLostPoint = function(qrcode) { var moduleCount = qrcode.getModuleCount(); var lostPoint = 0; // LEVEL1 for (var row = 0; row < moduleCount; row += 1) { for (var col = 0; col < moduleCount; col += 1) { var sameCount = 0; var dark = qrcode.isDark(row, col); for (var r = -1; r <= 1; r += 1) { if (row + r < 0 || moduleCount <= row + r) { continue; } for (var c = -1; c <= 1; c += 1) { if (col + c < 0 || moduleCount <= col + c) { continue; } if (r == 0 && c == 0) { continue; } if (dark == qrcode.isDark(row + r, col + c) ) { sameCount += 1; } } } if (sameCount > 5) { lostPoint += (3 + sameCount - 5); } } }; // LEVEL2 for (var row = 0; row < moduleCount - 1; row += 1) { for (var col = 0; col < moduleCount - 1; col += 1) { var count = 0; if (qrcode.isDark(row, col) ) count += 1; if (qrcode.isDark(row + 1, col) ) count += 1; if (qrcode.isDark(row, col + 1) ) count += 1; if (qrcode.isDark(row + 1, col + 1) ) count += 1; if (count == 0 || count == 4) { lostPoint += 3; } } } // LEVEL3 for (var row = 0; row < moduleCount; row += 1) { for (var col = 0; col < moduleCount - 6; col += 1) { 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 += 1) { for (var row = 0; row < moduleCount - 6; row += 1) { 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 += 1) { for (var row = 0; row < moduleCount; row += 1) { if (qrcode.isDark(row, col) ) { darkCount += 1; } } } var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; lostPoint += ratio * 10; return lostPoint; }; return _this; }(); //--------------------------------------------------------------------- // QRMath //--------------------------------------------------------------------- var QRMath = function() { var EXP_TABLE = new Array(256); var LOG_TABLE = new Array(256); // initialize tables for (var i = 0; i < 8; i += 1) { EXP_TABLE[i] = 1 << i; } for (var i = 8; i < 256; i += 1) { EXP_TABLE[i] = EXP_TABLE[i - 4] ^ EXP_TABLE[i - 5] ^ EXP_TABLE[i - 6] ^ EXP_TABLE[i - 8]; } for (var i = 0; i < 255; i += 1) { LOG_TABLE[EXP_TABLE[i] ] = i; } var _this = {}; _this.glog = function(n) { if (n < 1) { throw new Error('glog(' + n + ')'); } return LOG_TABLE[n]; }; _this.gexp = function(n) { while (n < 0) { n += 255; } while (n >= 256) { n -= 255; } return EXP_TABLE[n]; }; return _this; }(); //--------------------------------------------------------------------- // qrPolynomial //--------------------------------------------------------------------- function qrPolynomial(num, shift) { if (typeof num.length == 'undefined') { throw new Error(num.length + '/' + shift); } var _num = function() { var offset = 0; while (offset < num.length && num[offset] == 0) { offset += 1; } var _num = new Array(num.length - offset + shift); for (var i = 0; i < num.length - offset; i += 1) { _num[i] = num[i + offset]; } return _num; }(); var _this = {}; _this.getAt = function(index) { return _num[index]; }; _this.getLength = function() { return _num.length; }; _this.multiply = function(e) { var num = new Array(_this.getLength() + e.getLength() - 1); for (var i = 0; i < _this.getLength(); i += 1) { for (var j = 0; j < e.getLength(); j += 1) { num[i + j] ^= QRMath.gexp(QRMath.glog(_this.getAt(i) ) + QRMath.glog(e.getAt(j) ) ); } } return qrPolynomial(num, 0); }; _this.mod = function(e) { if (_this.getLength() - e.getLength() < 0) { return _this; } var ratio = QRMath.glog(_this.getAt(0) ) - QRMath.glog(e.getAt(0) ); var num = new Array(_this.getLength() ); for (var i = 0; i < _this.getLength(); i += 1) { num[i] = _this.getAt(i); } for (var i = 0; i < e.getLength(); i += 1) { num[i] ^= QRMath.gexp(QRMath.glog(e.getAt(i) ) + ratio); } // recursive call return qrPolynomial(num, 0).mod(e); }; return _this; }; //--------------------------------------------------------------------- // QRRSBlock //--------------------------------------------------------------------- var QRRSBlock = function() { var 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, 7, 37, 13], // 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] ]; var qrRSBlock = function(totalCount, dataCount) { var _this = {}; _this.totalCount = totalCount; _this.dataCount = dataCount; return _this; }; var _this = {}; var getRsBlockTable = function(typeNumber, errorCorrectLevel) { switch(errorCorrectLevel) { case QRErrorCorrectLevel.L : return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; case QRErrorCorrectLevel.M : return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; case QRErrorCorrectLevel.Q : return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; case QRErrorCorrectLevel.H : return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; default : return undefined; } }; _this.getRSBlocks = function(typeNumber, errorCorrectLevel) { var rsBlock = getRsBlockTable(typeNumber, errorCorrectLevel); if (typeof 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 += 1) { 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 += 1) { list.push(qrRSBlock(totalCount, dataCount) ); } } return list; }; return _this; }(); //--------------------------------------------------------------------- // qrBitBuffer //--------------------------------------------------------------------- var qrBitBuffer = function() { var _buffer = new Array(); var _length = 0; var _this = {}; _this.getBuffer = function() { return _buffer; }; _this.getAt = function(index) { var bufIndex = Math.floor(index / 8); return ( (_buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1; }; _this.put = function(num, length) { for (var i = 0; i < length; i += 1) { _this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1); } }; _this.getLengthInBits = function() { return _length; }; _this.putBit = function(bit) { var bufIndex = Math.floor(_length / 8); if (_buffer.length <= bufIndex) { _buffer.push(0); } if (bit) { _buffer[bufIndex] |= (0x80 >>> (_length % 8) ); } _length += 1; }; return _this; }; //--------------------------------------------------------------------- // qr8BitByte //--------------------------------------------------------------------- var qr8BitByte = function(data) { var _mode = QRMode.MODE_8BIT_BYTE; var _data = data; var _bytes = qrcode.stringToBytes(data); var _this = {}; _this.getMode = function() { return _mode; }; _this.getLength = function(buffer) { return _bytes.length; }; _this.write = function(buffer) { for (var i = 0; i < _bytes.length; i += 1) { buffer.put(_bytes[i], 8); } }; return _this; }; //===================================================================== // GIF Support etc. // //--------------------------------------------------------------------- // byteArrayOutputStream //--------------------------------------------------------------------- var byteArrayOutputStream = function() { var _bytes = new Array(); var _this = {}; _this.writeByte = function(b) { _bytes.push(b & 0xff); }; _this.writeShort = function(i) { _this.writeByte(i); _this.writeByte(i >>> 8); }; _this.writeBytes = function(b, off, len) { off = off || 0; len = len || b.length; for (var i = 0; i < len; i += 1) { _this.writeByte(b[i + off]); } }; _this.writeString = function(s) { for (var i = 0; i < s.length; i += 1) { _this.writeByte(s.charCodeAt(i) ); } }; _this.toByteArray = function() { return _bytes; }; _this.toString = function() { var s = ''; s += '['; for (var i = 0; i < _bytes.length; i += 1) { if (i > 0) { s += ','; } s += _bytes[i]; } s += ']'; return s; }; return _this; }; //--------------------------------------------------------------------- // base64EncodeOutputStream //--------------------------------------------------------------------- var base64EncodeOutputStream = function() { var _buffer = 0; var _buflen = 0; var _length = 0; var _base64 = ''; var _this = {}; var writeEncoded = function(b) { _base64 += String.fromCharCode(encode(b & 0x3f) ); }; var encode = function(n) { if (n < 0) { // error. } else if (n < 26) { return 0x41 + n; } else if (n < 52) { return 0x61 + (n - 26); } else if (n < 62) { return 0x30 + (n - 52); } else if (n == 62) { return 0x2b; } else if (n == 63) { return 0x2f; } throw new Error('n:' + n); }; _this.writeByte = function(n) { _buffer = (_buffer << 8) | (n & 0xff); _buflen += 8; _length += 1; while (_buflen >= 6) { writeEncoded(_buffer >>> (_buflen - 6) ); _buflen -= 6; } }; _this.flush = function() { if (_buflen > 0) { writeEncoded(_buffer << (6 - _buflen) ); _buffer = 0; _buflen = 0; } if (_length % 3 != 0) { // padding var padlen = 3 - _length % 3; for (var i = 0; i < padlen; i += 1) { _base64 += '='; } } }; _this.toString = function() { return _base64; }; return _this; }; //--------------------------------------------------------------------- // base64DecodeInputStream //--------------------------------------------------------------------- var base64DecodeInputStream = function(str) { var _str = str; var _pos = 0; var _buffer = 0; var _buflen = 0; var _this = {}; _this.read = function() { while (_buflen < 8) { if (_pos >= _str.length) { if (_buflen == 0) { return -1; } throw new Error('unexpected end of file./' + _buflen); } var c = _str.charAt(_pos); _pos += 1; if (c == '=') { _buflen = 0; return -1; } else if (c.match(/^s$/) ) { // ignore if whitespace. continue; } _buffer = (_buffer << 6) | decode(c.charCodeAt(0) ); _buflen += 6; } var n = (_buffer >>> (_buflen - 8) ) & 0xff; _buflen -= 8; return n; }; var decode = function(c) { if (0x41 <= c && c <= 0x5a) { return c - 0x41; } else if (0x61 <= c && c <= 0x7a) { return c - 0x61 + 26; } else if (0x30 <= c && c <= 0x39) { return c - 0x30 + 52; } else if (c == 0x2b) { return 62; } else if (c == 0x2f) { return 63; } else { throw new Error('c:' + c); } }; return _this; }; //--------------------------------------------------------------------- // gifImage (B/W) //--------------------------------------------------------------------- var gifImage = function(width, height) { var _width = width; var _height = height; var _data = new Array(width * height); var _this = {}; _this.setPixel = function(x, y, pixel) { _data[y * _width + x] = pixel; }; _this.write = function(out) { //--------------------------------- // GIF Signature out.writeString('GIF87a'); //--------------------------------- // Screen Descriptor out.writeShort(_width); out.writeShort(_height); out.writeByte(0x80); // 2bit out.writeByte(0); out.writeByte(0); //--------------------------------- // Global Color Map // black out.writeByte(0x00); out.writeByte(0x00); out.writeByte(0x00); // white out.writeByte(0xff); out.writeByte(0xff); out.writeByte(0xff); //--------------------------------- // Image Descriptor out.writeString(','); out.writeShort(0); out.writeShort(0); out.writeShort(_width); out.writeShort(_height); out.writeByte(0); //--------------------------------- // Local Color Map //--------------------------------- // Raster Data var lzwMinCodeSize = 2; var raster = getLZWRaster(lzwMinCodeSize); out.writeByte(lzwMinCodeSize); var offset = 0; while (raster.length - offset > 255) { out.writeByte(255); out.writeBytes(raster, offset, 255); offset += 255; } out.writeByte(raster.length - offset); out.writeBytes(raster, offset, raster.length - offset); out.writeByte(0x00); //--------------------------------- // GIF Terminator out.writeString(';'); }; var bitOutputStream = function(out) { var _out = out; var _bitLength = 0; var _bitBuffer = 0; var _this = {}; _this.write = function(data, length) { if ( (data >>> length) != 0) { throw new Error('length over'); } while (_bitLength + length >= 8) { _out.writeByte(0xff & ( (data << _bitLength) | _bitBuffer) ); length -= (8 - _bitLength); data >>>= (8 - _bitLength); _bitBuffer = 0; _bitLength = 0; } _bitBuffer = (data << _bitLength) | _bitBuffer; _bitLength = _bitLength + length; }; _this.flush = function() { if (_bitLength > 0) { _out.writeByte(_bitBuffer); } }; return _this; }; var getLZWRaster = function(lzwMinCodeSize) { var clearCode = 1 << lzwMinCodeSize; var endCode = (1 << lzwMinCodeSize) + 1; var bitLength = lzwMinCodeSize + 1; // Setup LZWTable var table = lzwTable(); for (var i = 0; i < clearCode; i += 1) { table.add(String.fromCharCode(i) ); } table.add(String.fromCharCode(clearCode) ); table.add(String.fromCharCode(endCode) ); var byteOut = byteArrayOutputStream(); var bitOut = bitOutputStream(byteOut); // clear code bitOut.write(clearCode, bitLength); var dataIndex = 0; var s = String.fromCharCode(_data[dataIndex]); dataIndex += 1; while (dataIndex < _data.length) { var c = String.fromCharCode(_data[dataIndex]); dataIndex += 1; if (table.contains(s + c) ) { s = s + c; } else { bitOut.write(table.indexOf(s), bitLength); if (table.size() < 0xfff) { if (table.size() == (1 << bitLength) ) { bitLength += 1; } table.add(s + c); } s = c; } } bitOut.write(table.indexOf(s), bitLength); // end code bitOut.write(endCode, bitLength); bitOut.flush(); return byteOut.toByteArray(); }; var lzwTable = function() { var _map = {}; var _size = 0; var _this = {}; _this.add = function(key) { if (_this.contains(key) ) { throw new Error('dup key:' + key); } _map[key] = _size; _size += 1; }; _this.size = function() { return _size; }; _this.indexOf = function(key) { return _map[key]; }; _this.contains = function(key) { return typeof _map[key] != 'undefined'; }; return _this; }; return _this; }; var createImgTag = function(width, height, getPixel, alt) { var gif = gifImage(width, height); for (var y = 0; y < height; y += 1) { for (var x = 0; x < width; x += 1) { gif.setPixel(x, y, getPixel(x, y) ); } } var b = byteArrayOutputStream(); gif.write(b); var base64 = base64EncodeOutputStream(); var bytes = b.toByteArray(); for (var i = 0; i < bytes.length; i += 1) { base64.writeByte(bytes[i]); } base64.flush(); var img = ''; img += '<img'; img += 'u0020src="'; img += 'data:image/gif;base64,'; img += base64; img += '"'; img += 'u0020width="'; img += width; img += '"'; img += 'u0020height="'; img += height; img += '"'; if (alt) { img += 'u0020alt="'; img += alt; img += '"'; } img += '/>'; return img; }; //--------------------------------------------------------------------- // returns qrcode function. return qrcode; }(); (function (factory) { if (typeof define === 'function' && define.amd) { define([], factory); } else if (typeof exports === 'object') { module.exports = factory(); } }(function () { return qrcode; })); //--------------------------------------------------------------------- // // QR Code Generator for JavaScript UTF8 Support (optional) // // Copyright (c) 2011 Kazuhiko Arase // // URL: http://www.d-project.com/ // // Licensed under the MIT license: // http://www.opensource.org/licenses/mit-license.php // // The word 'QR Code' is registered trademark of // DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/faqpatent-e.html // //--------------------------------------------------------------------- !function(qrcode) { //--------------------------------------------------------------------- // overwrite qrcode.stringToBytes //--------------------------------------------------------------------- qrcode.stringToBytes = function(s) { // http://stackoverflow.com/questions/18729405/how-to-convert-utf8-string-to-byte-array function toUTF8Array(str) { var utf8 = []; for (var i=0; i < str.length; i++) { var charcode = str.charCodeAt(i); if (charcode < 0x80) utf8.push(charcode); else if (charcode < 0x800) { utf8.push(0xc0 | (charcode >> 6), 0x80 | (charcode & 0x3f)); } else if (charcode < 0xd800 || charcode >= 0xe000) { utf8.push(0xe0 | (charcode >> 12), 0x80 | ((charcode>>6) & 0x3f), 0x80 | (charcode & 0x3f)); } // surrogate pair else { i++; // UTF-16 encodes 0x10000-0x10FFFF by // subtracting 0x10000 and splitting the // 20 bits of 0x0-0xFFFFF into two halves charcode = 0x10000 + (((charcode & 0x3ff)<<10) | (str.charCodeAt(i) & 0x3ff)); utf8.push(0xf0 | (charcode >>18), 0x80 | ((charcode>>12) & 0x3f), 0x80 | ((charcode>>6) & 0x3f), 0x80 | (charcode & 0x3f)); } } return utf8; } return toUTF8Array(s); }; }(qrcode); return qrcode; // eslint-disable-line no-undef }()));
已压缩qrcode.min.js代码：
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