/*! qrcanvas v3.1.2 | ISC License */
(function (exports) {
'use strict';

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }

  return target;
}

function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

function createCommonjsModule(fn, basedir, module) {
	return module = {
		path: basedir,
		exports: {},
		require: function (path, base) {
			return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
		}
	}, fn(module, module.exports), module.exports;
}

function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
}

var qrcode_1 = createCommonjsModule(function (module, exports) {
//---------------------------------------------------------------------
//
// 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 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, alt, title) {

      var opts = {};
      if (typeof arguments[0] == 'object') {
        // Called by options.
        opts = arguments[0];
        // overwrite cellSize and margin.
        cellSize = opts.cellSize;
        margin = opts.margin;
        alt = opts.alt;
        title = opts.title;
      }

      cellSize = cellSize || 2;
      margin = (typeof margin == 'undefined')? cellSize * 4 : margin;

      // Compose alt property surrogate
      alt = (typeof alt === 'string') ? {text: alt} : alt || {};
      alt.text = alt.text || null;
      alt.id = (alt.text) ? alt.id || 'qrcode-description' : null;

      // Compose title property surrogate
      title = (typeof title === 'string') ? {text: title} : title || {};
      title.text = title.text || null;
      title.id = (title.text) ? title.id || 'qrcode-title' : null;

      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 += !opts.scalable ? ' width="' + size + 'px" height="' + size + 'px"' : '';
      qrSvg += ' viewBox="0 0 ' + size + ' ' + size + '" ';
      qrSvg += ' preserveAspectRatio="xMinYMin meet"';
      qrSvg += (title.text || alt.text) ? ' role="img" aria-labelledby="' +
          escapeXml([title.id, alt.id].join(' ').trim() ) + '"' : '';
      qrSvg += '>';
      qrSvg += (title.text) ? '<title id="' + escapeXml(title.id) + '">' +
          escapeXml(title.text) + '</title>' : '';
      qrSvg += (alt.text) ? '<description id="' + escapeXml(alt.id) + '">' +
          escapeXml(alt.text) + '</description>' : '';
      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) {

      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, 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) {

      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);
      img += '"';
      img += '\u0020width="';
      img += size;
      img += '"';
      img += '\u0020height="';
      img += size;
      img += '"';
      if (alt) {
        img += '\u0020alt="';
        img += escapeXml(alt);
        img += '"';
      }
      img += '/>';

      return img;
    };

    var escapeXml = function(s) {
      var escaped = '';
      for (var i = 0; i < s.length; i += 1) {
        var c = s.charAt(i);
        switch(c) {
        case '<': escaped += '&lt;'; break;
        case '>': escaped += '&gt;'; break;
        case '&': escaped += '&amp;'; break;
        case '"': escaped += '&quot;'; break;
        default : escaped += c; break;
        }
      }
      return escaped;
    };

    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 blocksLastLineNoMargin = {
        '██': '▀',
        '█ ': '▀',
        ' █': ' ',
        '  ': ' '
      };

      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 += (margin < 1 && y+1 >= max) ? blocksLastLineNoMargin[p] : blocks[p];
        }

        ascii += '\n';
      }

      if (size % 2 && margin > 0) {
        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 _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 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) ; 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) {

    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 '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, getPixel) {
    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();

    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);
  };

}();

(function (factory) {
  {
      module.exports = factory();
  }
}(function () {
    return qrcode;
}));
});

var COLOR_BLACK = '#000';
var COLOR_WHITE = '#fff';

var helpers = {
  createCanvas: createCanvas,
  isCanvas: isCanvas,
  isDrawable: isDrawable,
  getCanvas: getCanvas,
  updateCanvas: updateCanvas,
  drawCanvas: drawCanvas,
  drawText: drawText
};

function createCanvas(width, height) {
  var canvas = document.createElement('canvas');
  canvas.width = width;
  canvas.height = height;
  return canvas;
}

function isCanvas(el) {
  return el instanceof HTMLCanvasElement;
}

function isDrawable(el) {
  return isCanvas(el) || el instanceof HTMLImageElement;
}
/**
 * @desc Create a new canvas.
 * @param {Int} width Width of the canvas.
 * @param {Int} height Height of the canvas.
 * @return {Canvas}
 */


function getCanvas(width, height) {
  return helpers.createCanvas(width, height == null ? width : height);
}

function updateCanvas(canvas, width, height) {
  if (canvas) {
    canvas.width = width;
    canvas.height = height == null ? width : height;
    return canvas;
  }

  return getCanvas(width, height);
}

/**
 * @desc Draw to the canvas with given image or colors.
 * @param {Canvas} canvas The canvas to initialize.
 * @param {Image | String | Array} data
 * @param {Object} options
 *    cellSize: {Int}
 *    clear: {Boolean}
 */
function drawCanvas(canvas, data, options) {
  if (options === void 0) {
    options = {};
  }

  var _options = options,
      cellSize = _options.cellSize,
      context = _options.context,
      _options$clear = _options.clear,
      clear = _options$clear === void 0 ? true : _options$clear;
  var width = canvas.width,
      height = canvas.height;
  var queue = [data];
  var ctx = context || canvas.getContext('2d');
  if (clear) ctx.clearRect(0, 0, width, height);
  ctx.globalCompositeOperation = 'source-over';

  while (queue.length) {
    var item = queue.shift();

    if (Array.isArray(item)) {
      queue = item.concat(queue);
    } else if (item) {
      var obj = void 0;

      if (helpers.isDrawable(item)) {
        obj = {
          image: item
        };
      } else if (typeof item === 'string') {
        obj = {
          style: item
        };
      } else {
        obj = item;
      }

      var x = (obj.col == null ? obj.x : obj.col * cellSize) || 0;
      var y = (obj.row == null ? obj.y : obj.row * cellSize) || 0;
      if (x < 0) x += width;
      if (y < 0) y += width;
      var w = ('cols' in obj ? obj.cols * cellSize : obj.w) || width;
      var h = ('rows' in obj ? obj.rows * cellSize : obj.h) || width;

      if (obj.image) {
        ctx.drawImage(obj.image, x, y, w, h);
      } else {
        ctx.fillStyle = obj.style || 'black';
        ctx.fillRect(x, y, w, h);
      }
    }
  }

  return canvas;
}

function drawText(text, options) {
  var _ref = options || {},
      _ref$fontSize = _ref.fontSize,
      fontSize = _ref$fontSize === void 0 ? 64 : _ref$fontSize,
      _ref$fontStyle = _ref.fontStyle,
      fontStyle = _ref$fontStyle === void 0 ? '' : _ref$fontStyle,
      _ref$fontFamily = _ref.fontFamily,
      fontFamily = _ref$fontFamily === void 0 ? 'Cursive' : _ref$fontFamily,
      _ref$color = _ref.color,
      color = _ref$color === void 0 ? null : _ref$color,
      _ref$pad = _ref.pad,
      pad = _ref$pad === void 0 ? 8 : _ref$pad,
      _ref$padColor = _ref.padColor,
      padColor = _ref$padColor === void 0 ? COLOR_WHITE : _ref$padColor,
      _ref$mode = _ref.mode,
      mode = _ref$mode === void 0 ? 1 : _ref$mode;

  var canvas = getCanvas(1);
  var ctx = canvas.getContext('2d');
  var padColorArr;

  if (padColor) {
    ctx.fillStyle = padColor;
    ctx.fillRect(0, 0, 1, 1);

    var _ctx$getImageData = ctx.getImageData(0, 0, 1, 1);

    padColorArr = _ctx$getImageData.data;
    if (!padColorArr[3]) padColorArr = null;
  }

  var height = fontSize + 2 * pad;
  var font = [fontStyle, fontSize + "px", fontFamily].filter(Boolean).join(' ');

  var resetContext = function resetContext() {
    ctx.textAlign = 'center';
    ctx.textBaseline = 'middle';
    ctx.font = font;
  };

  resetContext();
  var width = Math.ceil(ctx.measureText(text).width) + 2 * pad;
  canvas.width = width;
  canvas.height = height;
  resetContext();

  var fillText = function fillText() {
    ctx.fillStyle = color || COLOR_BLACK;
    ctx.fillText(text, width / 2, height / 2);
  };

  if (mode === 1) {
    ctx.fillStyle = padColor;
    ctx.fillRect(0, 0, width, height);
    fillText();
  } else {
    fillText();

    if (padColorArr) {
      (function () {
        var imageData = ctx.getImageData(0, 0, width, height);
        var data = imageData.data;
        var total = width * height;
        var padded = [];
        var offset = 0;

        var _loop = function _loop(loop) {
          var current = [];
          var unique = {};
          padded[offset] = current;
          offset = 1 - offset;
          var last = padded[offset];

          if (!last) {
            last = [];

            for (var i = 0; i < total; i += 1) {
              last.push(i);
            }
          }

          last.forEach(function (i) {
            if (data[4 * i + 3]) {
              [i % width ? i - 1 : -1, (i + 1) % width ? i + 1 : -1, i - width, i + width].forEach(function (j) {
                var k = 4 * j;

                if (k >= 0 && k <= data.length && !unique[j]) {
                  unique[j] = 1;
                  current.push(j);
                }
              });
            }
          });
          current.forEach(function (i) {
            var j = 4 * i;

            if (!data[j + 3]) {
              for (var k = 0; k < 4; k += 1) {
                data[j + k] = padColorArr[k];
              }
            }
          });
        };

        for (var loop = 0; loop < pad; loop += 1) {
          _loop();
        }

        ctx.putImageData(imageData, 0, 0);
      })();
    }
  }

  return canvas;
}

var effects = {
  "default": renderDefault,
  round: renderRound,
  fusion: renderFusion,
  spot: renderSpot
};

function renderDefault(_ref) {
  var foreground = _ref.foreground,
      cellSize = _ref.cellSize,
      isDark = _ref.isDark,
      count = _ref.count;
  var getCanvas = helpers.getCanvas,
      drawCanvas = helpers.drawCanvas;
  var width = cellSize * count;
  var canvasMask = getCanvas(width);
  var context = canvasMask.getContext('2d');
  context.fillStyle = COLOR_BLACK;
  drawCells({
    cellSize: cellSize,
    count: count
  }, function (_ref2) {
    var i = _ref2.i,
        j = _ref2.j,
        x = _ref2.x,
        y = _ref2.y;

    if (isDark(i, j)) {
      context.fillRect(x, y, cellSize, cellSize);
    }
  });
  var canvasFg = getCanvas(width);
  drawCanvas(canvasFg, foreground, {
    cellSize: cellSize
  });
  var ctx = canvasFg.getContext('2d');
  ctx.globalCompositeOperation = 'destination-in';
  ctx.drawImage(canvasMask, 0, 0);
  return canvasFg;
}

function renderRound(_ref3, maskOptions) {
  var foreground = _ref3.foreground,
      cellSize = _ref3.cellSize,
      isDark = _ref3.isDark,
      count = _ref3.count;
  var getCanvas = helpers.getCanvas,
      drawCanvas = helpers.drawCanvas;
  var width = cellSize * count;
  var canvasMask = getCanvas(width);
  var _maskOptions$value = maskOptions.value,
      value = _maskOptions$value === void 0 ? 1 : _maskOptions$value;
  var radius = value * cellSize / 2;
  var context = canvasMask.getContext('2d');
  context.fillStyle = COLOR_BLACK;
  drawCells({
    cellSize: cellSize,
    count: count
  }, function (_ref4) {
    var i = _ref4.i,
        j = _ref4.j,
        x = _ref4.x,
        y = _ref4.y;

    if (isDark(i, j)) {
      context.beginPath();
      context.moveTo(x + 0.5 * cellSize, y);
      drawCorner(context, x + cellSize, y, x + cellSize, y + 0.5 * cellSize, radius);
      drawCorner(context, x + cellSize, y + cellSize, x + 0.5 * cellSize, y + cellSize, radius);
      drawCorner(context, x, y + cellSize, x, y + 0.5 * cellSize, radius);
      drawCorner(context, x, y, x + 0.5 * cellSize, y, radius); // context.closePath();

      context.fill();
    }
  });
  var canvasFg = getCanvas(width);
  drawCanvas(canvasFg, foreground, {
    cellSize: cellSize
  });
  var ctx = canvasFg.getContext('2d');
  ctx.globalCompositeOperation = 'destination-in';
  ctx.drawImage(canvasMask, 0, 0);
  return canvasFg;
}

function renderFusion(_ref5, maskOptions) {
  var foreground = _ref5.foreground,
      cellSize = _ref5.cellSize,
      isDark = _ref5.isDark,
      count = _ref5.count;
  var getCanvas = helpers.getCanvas,
      drawCanvas = helpers.drawCanvas;
  var width = cellSize * count;
  var canvasMask = getCanvas(width);
  var context = canvasMask.getContext('2d');
  context.fillStyle = COLOR_BLACK;
  var _maskOptions$value2 = maskOptions.value,
      value = _maskOptions$value2 === void 0 ? 1 : _maskOptions$value2;
  var radius = value * cellSize / 2;
  drawCells({
    cellSize: cellSize,
    count: count
  }, function (_ref6) {
    var i = _ref6.i,
        j = _ref6.j,
        x = _ref6.x,
        y = _ref6.y;
    var corners = [0, 0, 0, 0]; // NW, NE, SE, SW

    if (isDark(i - 1, j)) {
      corners[0] += 1;
      corners[1] += 1;
    }

    if (isDark(i + 1, j)) {
      corners[2] += 1;
      corners[3] += 1;
    }

    if (isDark(i, j - 1)) {
      corners[0] += 1;
      corners[3] += 1;
    }

    if (isDark(i, j + 1)) {
      corners[1] += 1;
      corners[2] += 1;
    }

    if (isDark(i, j)) {
      if (isDark(i - 1, j - 1)) corners[0] += 1;
      if (isDark(i - 1, j + 1)) corners[1] += 1;
      if (isDark(i + 1, j + 1)) corners[2] += 1;
      if (isDark(i + 1, j - 1)) corners[3] += 1;
      context.beginPath();
      context.moveTo(x + 0.5 * cellSize, y);
      drawCorner(context, x + cellSize, y, x + cellSize, y + 0.5 * cellSize, corners[1] ? 0 : radius);
      drawCorner(context, x + cellSize, y + cellSize, x + 0.5 * cellSize, y + cellSize, corners[2] ? 0 : radius);
      drawCorner(context, x, y + cellSize, x, y + 0.5 * cellSize, corners[3] ? 0 : radius);
      drawCorner(context, x, y, x + 0.5 * cellSize, y, corners[0] ? 0 : radius); // context.closePath();

      context.fill();
    } else {
      if (corners[0] === 2) {
        fillCorner(context, x, y + 0.5 * cellSize, x, y, x + 0.5 * cellSize, y, radius);
      }

      if (corners[1] === 2) {
        fillCorner(context, x + 0.5 * cellSize, y, x + cellSize, y, x + cellSize, y + 0.5 * cellSize, radius);
      }

      if (corners[2] === 2) {
        fillCorner(context, x + cellSize, y + 0.5 * cellSize, x + cellSize, y + cellSize, x + 0.5 * cellSize, y + cellSize, radius);
      }

      if (corners[3] === 2) {
        fillCorner(context, x + 0.5 * cellSize, y + cellSize, x, y + cellSize, x, y + 0.5 * cellSize, radius);
      }
    }
  });
  var canvasFg = getCanvas(width);
  drawCanvas(canvasFg, foreground, {
    cellSize: cellSize
  });
  var ctx = canvasFg.getContext('2d');
  ctx.globalCompositeOperation = 'destination-in';
  ctx.drawImage(canvasMask, 0, 0);
  return canvasFg;
}

function renderSpot(_ref7, maskOptions) {
  var foreground = _ref7.foreground,
      cellSize = _ref7.cellSize,
      isDark = _ref7.isDark,
      count = _ref7.count;
  var getCanvas = helpers.getCanvas,
      drawCanvas = helpers.drawCanvas;
  var width = cellSize * count;
  var canvasMask = getCanvas(width);
  var value = maskOptions.value,
      _maskOptions$foregrou = maskOptions.foregroundLight,
      foregroundLight = _maskOptions$foregrou === void 0 ? COLOR_WHITE : _maskOptions$foregrou;
  var context = canvasMask.getContext('2d');
  var canvasLayer = getCanvas(width);
  var canvasFg = getCanvas(width);
  var ctxLayer = canvasLayer.getContext('2d');
  [{
    dark: true,
    foreground: foreground
  }, {
    dark: false,
    foreground: foregroundLight
  }].forEach(function (item) {
    context.fillStyle = COLOR_BLACK;
    context.clearRect(0, 0, width, width);
    drawCells({
      cellSize: cellSize,
      count: count
    }, function (_ref8) {
      var i = _ref8.i,
          j = _ref8.j,
          x = _ref8.x,
          y = _ref8.y;

      if (isDark(i, j) ^ +!item.dark) {
        var fillSize;

        if (i <= 7 && j <= 7 || i <= 7 && count - j - 1 <= 7 || count - i - 1 <= 7 && j <= 7 || i + 5 <= count && i + 9 >= count && j + 5 <= count && j + 9 >= count || i === 7 || j === 7) {
          fillSize = 1 - 0.1 * value;
        } else {
          fillSize = 0.25;
        }

        var offset = (1 - fillSize) / 2;
        context.fillRect(x + offset * cellSize, y + offset * cellSize, fillSize * cellSize, fillSize * cellSize);
      }
    });
    drawCanvas(canvasLayer, item.foreground, {
      cellSize: cellSize,
      context: ctxLayer
    });
    ctxLayer.globalCompositeOperation = 'destination-in';
    ctxLayer.drawImage(canvasMask, 0, 0);
    drawCanvas(canvasFg, canvasLayer, {
      cellSize: cellSize,
      clear: false
    });
  });
  return canvasFg;
}

function drawCells(_ref9, drawEach) {
  var cellSize = _ref9.cellSize,
      count = _ref9.count;

  for (var i = 0; i < count; i += 1) {
    for (var j = 0; j < count; j += 1) {
      var x = j * cellSize;
      var y = i * cellSize;
      drawEach({
        i: i,
        j: j,
        x: x,
        y: y
      });
    }
  }
}

function drawCorner(ctx, cornerX, cornerY, x, y, r) {
  if (r) {
    ctx.arcTo(cornerX, cornerY, x, y, r);
  } else {
    ctx.lineTo(cornerX, cornerY);
    ctx.lineTo(x, y);
  }
}

function fillCorner(context, startX, startY, cornerX, cornerY, destX, destY, radius) {
  context.beginPath();
  context.moveTo(startX, startY);
  drawCorner(context, cornerX, cornerY, destX, destY, radius);
  context.lineTo(cornerX, cornerY);
  context.lineTo(startX, startY); // context.closePath();

  context.fill();
}

// Enable UTF_8 support
qrcode_1.stringToBytes = qrcode_1.stringToBytesFuncs['UTF-8'];
var DEFAULTS = {
  background: 'white',
  foreground: 'black',
  typeNumber: 0,
  correctLevel: 'L',
  data: '',
  padding: 0,
  resize: true
};

var QRCanvasRenderer = /*#__PURE__*/function () {
  function QRCanvasRenderer(options) {
    var _this = this;

    this.options = _extends({}, DEFAULTS);
    this.cache = {};

    this.isDark = function (i, j) {
      var _this$cache = _this.cache,
          qr = _this$cache.qr,
          count = _this$cache.count;
      if (i < 0 || i >= count || j < 0 || j >= count) return false;
      return qr.isDark(i, j);
    };

    this.setOptions(options);
  }

  var _proto = QRCanvasRenderer.prototype;

  _proto.render = function render(canvas, config) {
    if (config === void 0) {
      config = {};
    }

    var _this$options = this.options,
        background = _this$options.background,
        foreground = _this$options.foreground,
        padding = _this$options.padding,
        effect = _this$options.effect,
        logo = _this$options.logo,
        resize = _this$options.resize;
    var onRender = effects[effect.type] || effects["default"];
    var count = this.cache.count;
    var drawCanvas = helpers.drawCanvas;
    var _config = config,
        size = _config.size;
    var canvasOut;
    var canvasBg;
    var canvasFg; // Prepare output canvas, resize it if cellSize or size is provided.

    {
      var _config2 = config,
          cellSize = _config2.cellSize;
      if (!canvas && !cellSize && !size) cellSize = 6;
      if (cellSize) size = count * cellSize + padding + padding;

      if (size) {
        canvasOut = resize || !canvas ? helpers.updateCanvas(canvas, size) : canvas;
      } else {
        size = canvas.width;
        canvasOut = canvas;
      }
    }
    var contentSize = size - padding - padding; // Create foreground and background layers on canvas

    {
      var _cellSize = Math.ceil(contentSize / count);

      var sketchSize = _cellSize * count;
      canvasBg = helpers.getCanvas(_cellSize * count);
      drawCanvas(canvasBg, background, {
        cellSize: _cellSize
      });
      canvasFg = onRender(_extends({
        foreground: foreground,
        cellSize: _cellSize,
        isDark: this.isDark
      }, this.cache), this.options.effect); // draw logo

      if (logo) {
        var logoLayer = _extends({}, logo);

        if (!logo.w && !logo.h && !logo.cols && !logo.rows) {
          var _ref = logo.image,
              width = _ref.width,
              height = _ref.height;
          var imageRatio = width / height;
          var posRatio = Math.min((count - 18) / count, 0.38);
          var h = Math.min(height, sketchSize * posRatio, sketchSize * posRatio / imageRatio);
          var w = h * imageRatio;
          var x = (sketchSize - w) / 2;
          var y = (sketchSize - h) / 2;
          logoLayer.w = w;
          logoLayer.h = h;
          logoLayer.x = x;
          logoLayer.y = y;
        }

        drawCanvas(canvasFg, logoLayer, {
          clear: false
        });
      }
    } // Combine the layers

    drawCanvas(canvasOut, [{
      image: canvasBg
    }, {
      image: canvasFg,
      x: padding,
      y: padding,
      w: contentSize,
      h: contentSize
    }]);
    return canvasOut;
  };

  _proto.setOptions = function setOptions(options) {
    this.options = _extends({}, this.options, options);
    this.normalizeEffect();
    this.normalizeLogo();
    var _this$options2 = this.options,
        typeNumber = _this$options2.typeNumber,
        data = _this$options2.data,
        logo = _this$options2.logo; // L / M / Q / H

    var correctLevel = this.options.correctLevel;
    if (logo && ['Q', 'H'].indexOf(correctLevel) < 0) correctLevel = 'H';
    var qr = qrcode_1(typeNumber, correctLevel);
    qr.addData(data || '');
    qr.make();
    var count = qr.getModuleCount();
    this.cache = {
      qr: qr,
      count: count
    };
  };

  _proto.normalizeEffect = function normalizeEffect() {
    var effect = this.options.effect;

    if (typeof effect === 'string') {
      effect = {
        type: effect
      };
    }

    this.options.effect = effect || {};
  };

  _proto.normalizeLogo = function normalizeLogo() {
    var isDrawable = helpers.isDrawable,
        drawText = helpers.drawText;
    var logo = this.options.logo;

    if (logo) {
      if (isDrawable(logo)) {
        logo = {
          image: logo
        };
      } else if (!isDrawable(logo.image)) {
        if (typeof logo === 'string') {
          logo = {
            text: logo
          };
        }

        if (typeof logo.text === 'string') {
          logo = {
            image: drawText(logo.text, logo.options)
          };
        } else {
          logo = null;
        }
      }
    }

    this.options.logo = logo;
  };

  return QRCanvasRenderer;
}();

function qrcanvas(options) {
  var canvas = options.canvas,
      size = options.size,
      cellSize = options.cellSize,
      rest = _objectWithoutPropertiesLoose(options, ["canvas", "size", "cellSize"]);

  var renderer = new QRCanvasRenderer(rest);
  return renderer.render(canvas, {
    size: size,
    cellSize: cellSize
  });
}

function setCanvasModule(canvasModule) {
  var Canvas = canvasModule.Canvas,
      Image = canvasModule.Image,
      createCanvas = canvasModule.createCanvas;

  var isCanvas = function isCanvas(el) {
    return el instanceof Canvas;
  };

  var isDrawable = function isDrawable(el) {
    return isCanvas(el) || el instanceof Image;
  };

  helpers.createCanvas = createCanvas;
  helpers.isCanvas = isCanvas;
  helpers.isDrawable = isDrawable;
}

exports.effects = effects;
exports.helpers = helpers;
exports.qrcanvas = qrcanvas;
exports.setCanvasModule = setCanvasModule;

}(this.qrcanvas = this.qrcanvas || {}));