text: //---------------------------------------------------------------------
  //
  // 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
  //
  //---------------------------------------------------------------------
  
  export var qrcode = function() {
  
    //---------------------------------------------------------------------
    // qrcode
    //---------------------------------------------------------------------
  
    /**
     * qrcode
     * @param typeNumber 1 to 40
     * @param errorCorrectionLevel 'L','M','Q','H'
     */
    var qrcode = function(typeNumber, errorCorrectionLevel) {
  
      var PAD0 = 0xEC;
      var PAD1 = 0x11;
  
      var _typeNumber = typeNumber;
      var _errorCorrectionLevel = QRErrorCorrectionLevel[errorCorrectionLevel];
      var _modules = null;
      var _moduleCount = 0;
      var _dataCache = null;
      var _dataList = [];
  
      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, _errorCorrectionLevel, _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 = (_errorCorrectionLevel << 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, errorCorrectionLevel, dataList) {
  
        var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectionLevel);
  
        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 '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, mode) {
  
        mode = mode || 'Byte';
  
        var newData = null;
  
        switch(mode) {
        case 'Numeric' :
          newData = qrNumber(data);
          break;
        case 'Alphanumeric' :
          newData = qrAlphaNum(data);
          break;
        case 'Byte' :
          newData = qr8BitByte(data);
          break;
        case 'Kanji' :
          newData = qrKanji(data);
          break;
        default :
          throw 'mode:' + mode;
        }
  
        _dataList.push(newData);
        _dataCache = null;
      };
  
      _this.isDark = function(row, col) {
        if (row < 0 || _moduleCount <= row || col < 0 || _moduleCount <= col) {
          throw row + ',' + col;
        }
        return _modules[row][col];
      };
  
      _this.getModuleCount = function() {
        return _moduleCount;
      };
  
      _this.make = function() {
        if (_typeNumber < 1) {
          var typeNumber = 1;
  
          for (; typeNumber < 40; typeNumber++) {
            var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, _errorCorrectionLevel);
            var buffer = qrBitBuffer();
  
            for (var i = 0; i < _dataList.length; i++) {
              var data = _dataList[i];
              buffer.put(data.getMode(), 4);
              buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber) );
              data.write(buffer);
            }
  
            var totalDataCount = 0;
            for (var i = 0; i < rsBlocks.length; i++) {
              totalDataCount += rsBlocks[i].dataCount;
            }
  
            if (buffer.getLengthInBits() <= totalDataCount * 8) {
              break;
            }
          }
  
          _typeNumber = typeNumber;
        }
  
        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-width: 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-width: 0px; border-style: none;';
            qrHtml += ' border-collapse: collapse;';
            qrHtml += ' padding: 0px; margin: 0px;';
            qrHtml += ' width: ' + 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.createSvgTag = function(cellSize, margin) {
  
        cellSize = cellSize || 2;
        margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
        var size = _this.getModuleCount() * cellSize + margin * 2;
        var c, mc, r, mr, qrSvg='', rect;
  
        rect = 'l' + cellSize + ',0 0,' + cellSize +
          ' -' + cellSize + ',0 0,-' + cellSize + 'z ';
  
        qrSvg += '<svg version="1.1" xmlns="http://www.w3.org/2000/svg"';
        qrSvg += ' width="' + size + 'px"';
        qrSvg += ' height="' + size + 'px"';
        qrSvg += ' viewBox="0 0 ' + size + ' ' + size + '" ';
        qrSvg += ' preserveAspectRatio="xMinYMin meet">';
        qrSvg += '<rect width="100%" height="100%" fill="white" cx="0" cy="0"/>';
        qrSvg += '<path d="';
  
        for (r = 0; r < _this.getModuleCount(); r += 1) {
          mr = r * cellSize + margin;
          for (c = 0; c < _this.getModuleCount(); c += 1) {
            if (_this.isDark(r, c) ) {
              mc = c*cellSize+margin;
              qrSvg += 'M' + mc + ',' + mr + rect;
            }
          }
        }
  
        qrSvg += '" stroke="transparent" fill="black"/>';
        qrSvg += '</svg>';
  
        return qrSvg;
      };
  
      _this.createDataURL = function(cellSize, margin, fillColor, backgroundColor) {
  
        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 createDataURL(size, size, fillColor, backgroundColor, 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;
          }
        } );
      };
  
      _this.createImgTag = function(cellSize, margin, alt, fillColor, backgroundColor) {
  
        cellSize = cellSize || 2;
        margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
  
        var size = _this.getModuleCount() * cellSize + margin * 2;
  
        var img = '';
        img += '<img';
        img += '\u0020src="';
        img += _this.createDataURL(cellSize, margin, fillColor, backgroundColor);
        img += '"';
        img += '\u0020width="';
        img += size;
        img += '"';
        img += '\u0020height="';
        img += size;
        img += '"';
        if (alt) {
          img += '\u0020alt="';
          img += alt;
          img += '"';
        }
        img += '/>';
  
        return img;
      };
  
      var _createHalfASCII = function(margin) {
        var cellSize = 1;
        margin = (typeof margin == 'undefined')? cellSize * 2 : margin;
  
        var size = _this.getModuleCount() * cellSize + margin * 2;
        var min = margin;
        var max = size - margin;
  
        var y, x, r1, r2, p;
  
        var blocks = {
          '██': '█',
          '█ ': '▀',
          ' █': '▄',
          '  ': ' '
        };
  
        var ascii = '';
        for (y = 0; y < size; y += 2) {
          r1 = Math.floor((y - min) / cellSize);
          r2 = Math.floor((y + 1 - min) / cellSize);
          for (x = 0; x < size; x += 1) {
            p = '█';
  
            if (min <= x && x < max && min <= y && y < max && _this.isDark(r1, Math.floor((x - min) / cellSize))) {
              p = ' ';
            }
  
            if (min <= x && x < max && min <= y+1 && y+1 < max && _this.isDark(r2, Math.floor((x - min) / cellSize))) {
              p += ' ';
            }
            else {
              p += '█';
            }
  
            // Output 2 characters per pixel, to create full square. 1 character per pixels gives only half width of square.
            ascii += blocks[p];
          }
  
          ascii += '\n';
        }
  
        if (size % 2) {
          return ascii.substring(0, ascii.length - size - 1) + Array(size+1).join('▀');
        }
  
        return ascii.substring(0, ascii.length-1);
      };
  
      _this.createASCII = function(cellSize, margin) {
        cellSize = cellSize || 1;
  
        if (cellSize < 2) {
          return _createHalfASCII(margin);
        }
  
        cellSize -= 1;
        margin = (typeof margin == 'undefined')? cellSize * 2 : margin;
  
        var size = _this.getModuleCount() * cellSize + margin * 2;
        var min = margin;
        var max = size - margin;
  
        var y, x, r, p;
  
        var white = Array(cellSize+1).join('██');
        var black = Array(cellSize+1).join('  ');
  
        var ascii = '';
        var line = '';
        for (y = 0; y < size; y += 1) {
          r = Math.floor( (y - min) / cellSize);
          line = '';
          for (x = 0; x < size; x += 1) {
            p = 1;
  
            if (min <= x && x < max && min <= y && y < max && _this.isDark(r, Math.floor((x - min) / cellSize))) {
              p = 0;
            }
  
            // Output 2 characters per pixel, to create full square. 1 character per pixels gives only half width of square.
            line += p ? white : black;
          }
  
          for (r = 0; r < cellSize; r += 1) {
            ascii += line + '\n';
          }
        }
  
        return ascii.substring(0, ascii.length-1);
      };
  
      _this.renderTo2dContext = function(context, cellSize) {
        cellSize = cellSize || 2;
        var length = _this.getModuleCount();
        for (var row = 0; row < length; row++) {
          for (var col = 0; col < length; col++) {
            context.fillStyle = _this.isDark(row, col) ? 'black' : 'white';
            context.fillRect(row * cellSize, col * cellSize, cellSize, cellSize);
          }
        }
      }
  
      return _this;
    };
  
    //---------------------------------------------------------------------
    // qrcode.stringToBytes
    //---------------------------------------------------------------------
  
    qrcode.stringToBytesFuncs = {
      'default' : function(s) {
        var bytes = [];
        for (var i = 0; i < s.length; i += 1) {
          var c = s.charCodeAt(i);
          bytes.push(c & 0xff);
        }
        return bytes;
      }
    };
  
    qrcode.stringToBytes = qrcode.stringToBytesFuncs['default'];
  
    //---------------------------------------------------------------------
    // 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 'eof';
          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 count + ' != ' + numChars;
        }
  
        return unicodeMap;
      }();
  
      var unknownChar = '?'.charCodeAt(0);
  
      return function(s) {
        var bytes = [];
        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
    };
  
    //---------------------------------------------------------------------
    // QRErrorCorrectionLevel
    //---------------------------------------------------------------------
  
    var QRErrorCorrectionLevel = {
      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 '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 '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 '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 'mode:' + mode;
          }
  
        } else {
          throw '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 '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 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, errorCorrectionLevel) {
  
        switch(errorCorrectionLevel) {
        case QRErrorCorrectionLevel.L :
          return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
        case QRErrorCorrectionLevel.M :
          return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
        case QRErrorCorrectionLevel.Q :
          return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
        case QRErrorCorrectionLevel.H :
          return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
        default :
          return undefined;
        }
      };
  
      _this.getRSBlocks = function(typeNumber, errorCorrectionLevel) {
  
        var rsBlock = getRsBlockTable(typeNumber, errorCorrectionLevel);
  
        if (typeof rsBlock == 'undefined') {
          throw 'bad rs block @ typeNumber:' + typeNumber +
              '/errorCorrectionLevel:' + errorCorrectionLevel;
        }
  
        var length = rsBlock.length / 3;
  
        var list = [];
  
        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 = [];
      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;
    };
  
    //---------------------------------------------------------------------
    // qrNumber
    //---------------------------------------------------------------------
  
    var qrNumber = function(data) {
  
      var _mode = QRMode.MODE_NUMBER;
      var _data = data;
  
      var _this = {};
  
      _this.getMode = function() {
        return _mode;
      };
  
      _this.getLength = function(buffer) {
        return _data.length;
      };
  
      _this.write = function(buffer) {
  
        var data = _data;
  
        var i = 0;
  
        while (i + 2 < data.length) {
          buffer.put(strToNum(data.substring(i, i + 3) ), 10);
          i += 3;
        }
  
        if (i < data.length) {
          if (data.length - i == 1) {
            buffer.put(strToNum(data.substring(i, i + 1) ), 4);
          } else if (data.length - i == 2) {
            buffer.put(strToNum(data.substring(i, i + 2) ), 7);
          }
        }
      };
  
      var strToNum = function(s) {
        var num = 0;
        for (var i = 0; i < s.length; i += 1) {
          num = num * 10 + chatToNum(s.charAt(i) );
        }
        return num;
      };
  
      var chatToNum = function(c) {
        if ('0' <= c && c <= '9') {
          return c.charCodeAt(0) - '0'.charCodeAt(0);
        }
        throw 'illegal char :' + c;
      };
  
      return _this;
    };
  
    //---------------------------------------------------------------------
    // qrAlphaNum
    //---------------------------------------------------------------------
  
    var qrAlphaNum = function(data) {
  
      var _mode = QRMode.MODE_ALPHA_NUM;
      var _data = data;
  
      var _this = {};
  
      _this.getMode = function() {
        return _mode;
      };
  
      _this.getLength = function(buffer) {
        return _data.length;
      };
  
      _this.write = function(buffer) {
  
        var s = _data;
  
        var i = 0;
  
        while (i + 1 < s.length) {
          buffer.put(
            getCode(s.charAt(i) ) * 45 +
            getCode(s.charAt(i + 1) ), 11);
          i += 2;
        }
  
        if (i < s.length) {
          buffer.put(getCode(s.charAt(i) ), 6);
        }
      };
  
      var getCode = function(c) {
  
        if ('0' <= c && c <= '9') {
          return c.charCodeAt(0) - '0'.charCodeAt(0);
        } else if ('A' <= c && c <= 'Z') {
          return c.charCodeAt(0) - 'A'.charCodeAt(0) + 10;
        } else {
          switch (c) {
          case ' ' : return 36;
          case '$' : return 37;
          case '%' : return 38;
          case '*' : return 39;
          case '+' : return 40;
          case '-' : return 41;
          case '.' : return 42;
          case '/' : return 43;
          case ':' : return 44;
          default :
            throw 'illegal char :' + c;
          }
        }
      };
  
      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;
    };
  
    //---------------------------------------------------------------------
    // qrKanji
    //---------------------------------------------------------------------
  
    var qrKanji = function(data) {
  
      var _mode = QRMode.MODE_KANJI;
      var _data = data;
  
      var stringToBytes = qrcode.stringToBytesFuncs['SJIS'];
      if (!stringToBytes) {
        throw 'sjis not supported.';
      }
      !function(c, code) {
        // self test for sjis support.
        var test = stringToBytes(c);
        if (test.length != 2 || ( (test[0] << 8) | test[1]) != code) {
          throw 'sjis not supported.';
        }
      }('\u53cb', 0x9746);
  
      var _bytes = stringToBytes(data);
  
      var _this = {};
  
      _this.getMode = function() {
        return _mode;
      };
  
      _this.getLength = function(buffer) {
        return ~~(_bytes.length / 2);
      };
  
      _this.write = function(buffer) {
  
        var data = _bytes;
  
        var i = 0;
  
        while (i + 1 < data.length) {
  
          var c = ( (0xff & data[i]) << 8) | (0xff & data[i + 1]);
  
          if (0x8140 <= c && c <= 0x9FFC) {
            c -= 0x8140;
          } else if (0xE040 <= c && c <= 0xEBBF) {
            c -= 0xC140;
          } else {
            throw 'illegal char at ' + (i + 1) + '/' + c;
          }
  
          c = ( (c >>> 8) & 0xff) * 0xC0 + (c & 0xff);
  
          buffer.put(c, 13);
  
          i += 2;
        }
  
        if (i < data.length) {
          throw 'illegal char at ' + (i + 1);
        }
      };
  
      return _this;
    };
  
    //=====================================================================
    // GIF Support etc.
    //
  
    //---------------------------------------------------------------------
    // byteArrayOutputStream
    //---------------------------------------------------------------------
  
    var byteArrayOutputStream = function() {
  
      var _bytes = [];
  
      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 '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 '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 'c:' + c;
        }
      };
  
      return _this;
    };
  
    //---------------------------------------------------------------------
    // gifImage (B/W)
    //---------------------------------------------------------------------
  
    var gifImage = function(width, height, fillColor, backgroundColor) {
  
      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
  
        // Fill color, default black
        out.writeByte(fillColor && fillColor.length >= 6 ? parseInt('0x' + fillColor.substr(0, 2)) : 0x00);
        out.writeByte(fillColor && fillColor.length >= 6 ? parseInt('0x' + fillColor.substr(2, 2)) : 0x00);
        out.writeByte(fillColor && fillColor.length >= 6 ? parseInt('0x' + fillColor.substr(4, 2)) : 0x00);
  
        // Background color, default white
        out.writeByte(backgroundColor && backgroundColor.length >= 6 ? parseInt('0x' + backgroundColor.substr(0, 2)) : 0xff);
        out.writeByte(backgroundColor && backgroundColor.length >= 6 ? parseInt('0x' + backgroundColor.substr(2, 2)) : 0xff);
        out.writeByte(backgroundColor && backgroundColor.length >= 6 ? parseInt('0x' + backgroundColor.substr(4, 2)) : 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 '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 '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 createDataURL = function(width, height, fillColor, backgroundColor, getPixel) {
      var gif = gifImage(width, height, fillColor, backgroundColor);
      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();
  
      return 'data:image/gif;base64,' + base64;
    };
  
    //---------------------------------------------------------------------
    // returns qrcode function.
  
    return qrcode;
  }();
  
  // multibyte support
  !function() {
  
    qrcode.stringToBytesFuncs['UTF-8'] = 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);
    };
  
  }();
  