From b414036d9859f5d664249d4f8f4841985aaa4a2e Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Sat, 22 Aug 2020 15:29:41 +0200
Subject: [PATCH 1/8] JavaScript improvements

* Custom colours
* PNG/WEBP/JPEG output on the sample page via HTML5 canvas
* Sample page: More options, better layout, download and info
* SVG output: Fixed background rect size
* Canvas output: Added margin
* ASCII output: Added optional inverted display (was already inverted, switched it back)
* ASCII output: Fixed size (was square value of requested size)
* HTML table output: Optimised HTML size
---
 js/qrcode.js   | 134 +++++++++++++++++++++++++++----------------------
 js/sample.css  |  49 ++++++++++++++++++
 js/sample.html |  95 +++++++++++++++++++++++++----------
 js/sample.js   | 118 +++++++++++++++++++++++++++++++++++++------
 4 files changed, 296 insertions(+), 100 deletions(-)
 create mode 100644 js/sample.css

diff --git a/js/qrcode.js b/js/qrcode.js
index 76889b5..5879f78 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -37,6 +37,8 @@ var qrcode = function() {
     var _moduleCount = 0;
     var _dataCache = null;
     var _dataList = [];
+    var _foreground = "black";
+    var _background = "white";
 
     var _this = {};
 
@@ -452,6 +454,17 @@ var qrcode = function() {
       makeImpl(false, getBestMaskPattern() );
     };
 
+    _this.setColors = function(foreground, background) {
+      _foreground = simplifyColor(foreground);
+      _background = simplifyColor(background);
+
+      function simplifyColor(c) {
+        if (c.match(/^#[0-9A-Fa-f]{6}$/) && c[1] === c[2] && c[3] === c[4] && c[5] === c[6])
+          c = "#" + c[1] + c[3] + c[5];
+        return c;
+      }
+    };
+
     _this.createTableTag = function(cellSize, margin) {
 
       cellSize = cellSize || 2;
@@ -459,34 +472,28 @@ var qrcode = function() {
 
       var qrHtml = '';
 
-      qrHtml += '<table style="';
-      qrHtml += ' border-width: 0px; border-style: none;';
+      qrHtml += '<table style="border: solid ' + margin + 'px ' + _background + ';';
       qrHtml += ' border-collapse: collapse;';
-      qrHtml += ' padding: 0px; margin: ' + margin + 'px;';
+      qrHtml += ' padding: 0px;';
       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 += '<td style="border: 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 += ' background-color: ' + (_this.isDark(r, c) ? _foreground : _background) + ';';
           qrHtml += '"/>';
         }
 
         qrHtml += '</tr>';
       }
 
-      qrHtml += '</tbody>';
       qrHtml += '</table>';
 
       return qrHtml;
@@ -535,7 +542,7 @@ var qrcode = function() {
           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 += '<rect width="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
       qrSvg += '<path d="';
 
       for (r = 0; r < _this.getModuleCount(); r += 1) {
@@ -548,7 +555,7 @@ var qrcode = function() {
         }
       }
 
-      qrSvg += '" stroke="transparent" fill="black"/>';
+      qrSvg += '" stroke="transparent" fill="' + _foreground + '"/>';
       qrSvg += '</svg>';
 
       return qrSvg;
@@ -563,7 +570,7 @@ var qrcode = function() {
       var min = margin;
       var max = size - margin;
 
-      return createDataURL(size, size, function(x, y) {
+      return createDataURL(size, size, _foreground, _background, 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);
@@ -582,21 +589,11 @@ var qrcode = function() {
       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 += '<img src="' + _this.createDataURL(cellSize, margin) + '"';
+      img += ' width="' + size + '"';
+      img += ' height="' + size + '"';
+      if (alt)
+        img += ' alt="' + escapeXml(alt) + '"';
       img += '/>';
 
       return img;
@@ -617,7 +614,7 @@ var qrcode = function() {
       return escaped;
     };
 
-    var _createHalfASCII = function(margin) {
+    var _createHalfASCII = function(margin, inverted) {
       var cellSize = 1;
       margin = (typeof margin == 'undefined')? cellSize * 2 : margin;
 
@@ -631,14 +628,14 @@ var qrcode = function() {
         '██': '█',
         '█ ': '▀',
         ' █': '▄',
-        '  ': ' '
+        '  ': '\xa0'
       };
 
       var blocksLastLineNoMargin = {
         '██': '▀',
         '█ ': '▀',
-        ' █': ' ',
-        '  ': ' '
+        ' █': '\xa0',
+        '  ': '\xa0'
       };
 
       var ascii = '';
@@ -646,17 +643,17 @@ var qrcode = function() {
         r1 = Math.floor((y - min) / cellSize);
         r2 = Math.floor((y + 1 - min) / cellSize);
         for (x = 0; x < size; x += 1) {
-          p = '█';
+          p = inverted ? '█' : ' ';
 
           if (min <= x && x < max && min <= y && y < max && _this.isDark(r1, Math.floor((x - min) / cellSize))) {
-            p = ' ';
+            p = inverted ? ' ' : '█';
           }
 
           if (min <= x && x < max && min <= y+1 && y+1 < max && _this.isDark(r2, Math.floor((x - min) / cellSize))) {
-            p += ' ';
+            p += inverted ? ' ' : '█';
           }
           else {
-            p += '█';
+            p += inverted ? '█' : ' ';
           }
 
           // Output 2 characters per pixel, to create full square. 1 character per pixels gives only half width of square.
@@ -667,21 +664,21 @@ var qrcode = function() {
       }
 
       if (size % 2 && margin > 0) {
-        return ascii.substring(0, ascii.length - size - 1) + Array(size+1).join('▀');
+        return ascii.substring(0, ascii.length - size - 1) + Array(size+1).join(inverted ? '▀' : '\xa0');
       }
 
       return ascii.substring(0, ascii.length-1);
     };
 
-    _this.createASCII = function(cellSize, margin) {
+    _this.createASCII = function(cellSize, margin, inverted) {
       cellSize = cellSize || 1;
 
       if (cellSize < 2) {
-        return _createHalfASCII(margin);
+        return _createHalfASCII(margin, inverted);
       }
 
       cellSize -= 1;
-      margin = (typeof margin == 'undefined')? cellSize * 2 : margin;
+      margin = (typeof margin == 'undefined')? cellSize * 2 : margin / (cellSize + 1)  * cellSize;
 
       var size = _this.getModuleCount() * cellSize + margin * 2;
       var min = margin;
@@ -689,8 +686,13 @@ var qrcode = function() {
 
       var y, x, r, p;
 
-      var white = Array(cellSize+1).join('██');
-      var black = Array(cellSize+1).join('  ');
+      var white = '\xa0\xa0';
+      var black = '██';
+      if (inverted) {
+        var b = black;
+        black = white;
+        white = b;
+      }
 
       var ascii = '';
       var line = '';
@@ -708,21 +710,24 @@ var qrcode = function() {
           line += p ? white : black;
         }
 
-        for (r = 0; r < cellSize; r += 1) {
-          ascii += line + '\n';
-        }
+        ascii += line + '\n';
       }
 
       return ascii.substring(0, ascii.length-1);
     };
 
-    _this.renderTo2dContext = function(context, cellSize) {
+    _this.renderTo2dContext = function(context, cellSize, margin) {
       cellSize = cellSize || 2;
+      margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
       var length = _this.getModuleCount();
+      if (margin > 0) {
+        context.fillStyle = _background;
+        context.fillRect(0, 0, length * cellSize + margin * 2, length * cellSize + margin * 2);
+      }
       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);
+          context.fillStyle = _this.isDark(row, col) ? _foreground : _background;
+          context.fillRect(margin + col * cellSize, margin + row * cellSize, cellSize, cellSize);
         }
       }
     }
@@ -2009,7 +2014,7 @@ var qrcode = function() {
   // gifImage (B/W)
   //---------------------------------------------------------------------
 
-  var gifImage = function(width, height) {
+  var gifImage = function(width, height, foreground, background) {
 
     var _width = width;
     var _height = height;
@@ -2041,15 +2046,17 @@ var qrcode = function() {
       //---------------------------------
       // Global Color Map
 
-      // black
-      out.writeByte(0x00);
-      out.writeByte(0x00);
-      out.writeByte(0x00);
+      // foreground
+      var fg = parseColor(foreground, "#000");
+      out.writeByte(fg[0]);
+      out.writeByte(fg[1]);
+      out.writeByte(fg[2]);
 
-      // white
-      out.writeByte(0xff);
-      out.writeByte(0xff);
-      out.writeByte(0xff);
+      // background
+      var bg = parseColor(background, "#fff");
+      out.writeByte(bg[0]);
+      out.writeByte(bg[1]);
+      out.writeByte(bg[2]);
 
       //---------------------------------
       // Image Descriptor
@@ -2089,6 +2096,15 @@ var qrcode = function() {
       out.writeString(';');
     };
 
+    function parseColor(c, fallback) {
+      c = c.toLowerCase();
+      if (c.match(/^#[0-9a-f]{3}$/))
+        return [parseInt(c[1] + c[1], 16), parseInt(c[2] + c[2], 16), parseInt(c[3] + c[3], 16)];
+      if (c.match(/^#[0-9a-f]{6}$/))
+        return [parseInt(c[1] + c[2], 16), parseInt(c[3] + c[4], 16), parseInt(c[5] + c[6], 16)];
+      return parseColor(fallback);
+    }
+
     var bitOutputStream = function(out) {
 
       var _out = out;
@@ -2219,8 +2235,8 @@ var qrcode = function() {
     return _this;
   };
 
-  var createDataURL = function(width, height, getPixel) {
-    var gif = gifImage(width, height);
+  var createDataURL = function(width, height, foreground, background, getPixel) {
+    var gif = gifImage(width, height, foreground, background);
     for (var y = 0; y < height; y += 1) {
       for (var x = 0; x < width; x += 1) {
         gif.setPixel(x, y, getPixel(x, y) );
diff --git a/js/sample.css b/js/sample.css
new file mode 100644
index 0000000..179e64a
--- /dev/null
+++ b/js/sample.css
@@ -0,0 +1,49 @@
+html
+{
+	background: #f0f0f0;
+}
+body,
+input,
+select,
+button
+{
+	font: 16px sans-serif;
+	line-height: 133%;
+}
+h1
+{
+	text-align: center;
+}
+textarea
+{
+	width: 95%;
+	height: 100px;
+	resize: vertical;
+	font-size: 16px;
+}
+p
+{
+	margin: 1em auto;
+	text-align: center;
+}
+#qr
+{
+	margin: 3em auto;
+	text-align: center;
+}
+#qr > *
+{
+	outline: solid 1px #e0e0e0;
+}
+#qr pre
+{
+	display: inline-block;
+	background: white;
+	color: black;
+	font-size: 8px;
+	line-height: 100%;
+}
+#qr table
+{
+	margin: 0 auto;
+}
diff --git a/js/sample.html b/js/sample.html
index 11bd2a8..19515ad 100644
--- a/js/sample.html
+++ b/js/sample.html
@@ -1,7 +1,7 @@
 <!doctype html>
 <html>
   <head>
-    <meta http-equiv="Content-Type" content="text/html; charset=Utf-8">
+    <meta charset="utf-8">
     <script type="text/javascript" src="qrcode.js"></script>
     <!-- SJIS Support (optional) -->
     <script type="text/javascript" src="qrcode_SJIS.js"></script>
@@ -14,36 +14,77 @@
 -->
     <script type="text/javascript" src="sample.js"></script>
     <title>QR Code Generator for JavaScript</title>
+    <link rel="stylesheet" href="sample.css">
   </head>
   <body onload="body_loadHander()">
+    <h1>QR Code Generator for JavaScript</h1>
     <form name="qrForm">
-      <span>TypeNumber:</span>
-      <select name="t"></select>
-      <span>ErrorCorrectionLevel:</span>
-      <select name="e">
-        <option value="L">L(7%)</option>
-        <option value="M" selected="selected">M(15%)</option>
-        <option value="Q">Q(25%)</option>
-        <option value="H">H(30%)</option>
-      </select>
-      <span>Mode:</span>
-      <select name="m">
-        <option value="Numeric">Numeric</option>
-        <option value="Alphanumeric">Alphanumeric</option>
-        <option value="Byte" selected>Byte</option>
-        <option value="Kanji">Kanji</option>
-      </select>
-      <span>Multibyte:</span>
-      <select name="mb">
-        <option value="default">None</option>
-        <option value="SJIS">SJIS</option>
-        <option value="UTF-8" selected>UTF-8</option>
-      </select>
-      <br/>
-      <textarea name="msg" rows="10" cols="40">here comes qr!</textarea>
-      <br/>
-      <input type="button" value="update" onclick="update_qrcode()"/>
+      <p>
+        <textarea name="msg">Type your message here.</textarea><br>
+        <span id="length"></span>
+      </p>
+      <p>
+        Cell size:
+        <input name="cellsize" type="number" min="1" max="999" value="4" size="4">
+        &nbsp;
+        Padding:
+        <input name="padding" type="number" min="0" max="9" value="1" size="3">
+        &nbsp;
+        Error correction level:
+        <select name="e">
+          <option value="L" selected>Low (7%)</option>
+          <option value="M">Medium (15%)</option>
+          <option value="Q">Quartile (25%)</option>
+          <option value="H">High (30%)</option>
+        </select>
+      </p>
+      <p>
+        Image type:
+        <select name="format">
+          <option value="svg" selected>SVG</option>
+          <option value="png">PNG</option>
+          <option value="webp">WEBP</option>
+          <option value="jpeg">JPEG</option>
+          <option value="gif">GIF</option>
+          <option value="gif-direct">GIF (w/o canvas)</option>
+          <option value="ascii">ASCII</option>
+          <option value="ascii-inv">ASCII inverted</option>
+          <option value="table">Table</option>
+        </select>
+        &nbsp;
+        Foreground:
+        <input name="foreground" type="color" value="#000000">
+        &nbsp;
+        Background:
+        <input name="background" type="color" value="#ffffff">
+      </p>
+      <p>
+        Content mode:
+        <select name="m">
+          <option value="" selected>Auto</option>
+          <option value="Numeric">Numeric</option>
+          <option value="Alphanumeric">Alphanumeric</option>
+          <option value="Byte">Byte</option>
+          <option value="Kanji">Kanji</option>
+        </select>
+        &nbsp;
+        Multibyte text:
+        <select name="mb">
+          <option value="default">None</option>
+          <option value="SJIS">SJIS</option>
+          <option value="UTF-8" selected>UTF-8</option>
+        </select>
+        &nbsp;
+        Size type:
+        <select name="t"></select>
+      </p>
       <div id="qr"></div>
+      <p>
+        <span id="qr-info"></span>
+      </p>
+      <p>
+        <button type="button" id="download">Download</button>
+      </p>
     </form>
   </body>
 </html>
diff --git a/js/sample.js b/js/sample.js
index d351b05..8f4e006 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -1,3 +1,4 @@
+var downloadFileName, downloadType, downloadData;
 
 var body_loadHander = function() {
 
@@ -9,41 +10,130 @@ var body_loadHander = function() {
   };
 
   var t = document.forms['qrForm'].elements['t'];
-  t.appendChild(crtOpt('' + 0, 'Auto Detect') );
+  t.appendChild(crtOpt('' + 0, 'Auto') );
   for (var i = 1; i <= 40; i += 1) {
     t.appendChild(crtOpt('' + i, '' + i) );
   }
   t.value = '0';
 
+  var form = document.forms['qrForm'];
+  form.elements['msg'].addEventListener("input", update_qrcode);
+  form.elements['t'].addEventListener("change", update_qrcode);
+  form.elements['cellsize'].addEventListener("input", update_qrcode);
+  form.elements['padding'].addEventListener("input", update_qrcode);
+  form.elements['e'].addEventListener("change", update_qrcode);
+  form.elements['m'].addEventListener("change", update_qrcode);
+  form.elements['mb'].addEventListener("change", update_qrcode);
+  form.elements['format'].addEventListener("change", update_qrcode);
+  form.elements['foreground'].addEventListener("change", update_qrcode);
+  form.elements['background'].addEventListener("change", update_qrcode);
   update_qrcode();
+
+  document.getElementById("download").addEventListener("click", function () {
+    download(downloadFileName, downloadType, downloadData);
+  });
 };
 
 var draw_qrcode = function(text, typeNumber, errorCorrectionLevel) {
   document.write(create_qrcode(text, typeNumber, errorCorrectionLevel) );
 };
 
-var create_qrcode = function(text, typeNumber,
-    errorCorrectionLevel, mode, mb) {
+var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectionLevel, mode, mb, format, fg, bg) {
+
+  if (!mode) {
+    if (text.match(/^[0-9]+$/))
+      mode = "Numeric";
+    else if (text.match(/^[0-9A-Z $%*+/.:-]+$/))
+      mode = "Alphanumeric";
+    else
+      mode = "Byte";
+  }
 
-  qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
+  try {
+    qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
+    
+    var qr = qrcode(typeNumber || 4, errorCorrectionLevel || 'M');
+    qr.addData(text, mode);
+    qr.make();
+    qr.setColors(fg, bg);
 
-  var qr = qrcode(typeNumber || 4, errorCorrectionLevel || 'M');
-  qr.addData(text, mode);
-  qr.make();
+    var size = qr.getModuleCount() * cellsize + padding * 2;
+    document.getElementById("qr-info").innerHTML = "Image size: " + size + "x" + size + " px";
 
-//  return qr.createTableTag();
-//  return qr.createSvgTag();
-  return qr.createImgTag();
+    switch (format) {
+      case "svg":
+        downloadFileName = "qr.svg";
+        downloadType = "image/svg";
+        downloadData = qr.createSvgTag(cellsize, padding);
+        return downloadData;
+      case "gif":
+      case "png":
+      case "webp":
+      case "jpeg":
+        var canvas = document.createElement("canvas");
+        canvas.width = canvas.height = qr.getModuleCount() * cellsize + padding * 2;
+        var context = canvas.getContext("2d");
+        qr.renderTo2dContext(context, cellsize, padding);
+        downloadFileName = "qr." + format;
+        downloadType = "";   // raw download data URL
+        downloadData = canvas.toDataURL("image/" + format);
+        var warning = "";
+        if (format === "webp" && downloadData.match(/^data:image\/png/))
+          warning = "<br><br><strong>Attention:</strong> This browser cannot generate WEBP images and made a PNG instead.";
+        return '<img src="' + downloadData + '" width="' + canvas.width + '" height="' + canvas.height + '">' + warning;
+      case "gif-direct":
+        downloadFileName = "qr.gif";
+        downloadType = "";   // raw download data URL
+        downloadData = qr.createDataURL(cellsize, padding);
+        return qr.createImgTag(cellsize, padding);
+      case "ascii":
+        downloadFileName = "qr.txt";
+        downloadType = "text/plain";
+        downloadData = qr.createASCII(cellsize, padding);
+        return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+      case "ascii-inv":
+        downloadFileName = "qr.txt";
+        downloadType = "text/plain";
+        downloadData = qr.createASCII(cellsize, padding, true);
+        return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+      case "table":
+        downloadFileName = "qr.html";
+        downloadType = "text/html";
+        downloadData = qr.createTableTag(cellsize, padding);
+        return downloadData;
+    }
+  }
+  catch (error) {
+    return "Error: " + error;
+  }
 };
 
 var update_qrcode = function() {
   var form = document.forms['qrForm'];
-  var text = form.elements['msg'].value.
-    replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');
+  var text = form.elements['msg'].value.replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');
   var t = form.elements['t'].value;
+  var cellsize = +form.elements['cellsize'].value;
+  var padding = +form.elements['padding'].value * cellsize;
   var e = form.elements['e'].value;
   var m = form.elements['m'].value;
   var mb = form.elements['mb'].value;
-  document.getElementById('qr').innerHTML =
-    create_qrcode(text, t, e, m, mb);
+  var format = form.elements['format'].value;
+  var fg = form.elements['foreground'].value;
+  var bg = form.elements['background'].value;
+  document.getElementById("length").innerHTML = "(" + text.length + " characters)";
+  document.getElementById('qr').innerHTML = create_qrcode(text, t, cellsize, padding, e, m, mb, format, fg, bg);
 };
+
+// Source: https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server
+function download(filename, mimeType, text) {
+  var element = document.createElement("a");
+  if (downloadType)
+    element.setAttribute("href", "data:" + mimeType + ";charset=utf-8," + encodeURIComponent(text));
+  else
+    element.setAttribute("href", text);
+  element.setAttribute("download", filename);
+  element.style.display = "none";
+  document.body.appendChild(element);
+  element.click();
+  document.body.removeChild(element);
+}

From 22c85661189a633c925af3c91f6480a5c203d951 Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Sat, 22 Aug 2020 16:13:24 +0200
Subject: [PATCH 2/8] Updated documentation

---
 js/README.md   | 15 ++++++++++-----
 js/qrcode.d.ts | 17 ++++++++---------
 js/qrcode.js   |  2 +-
 js/sample.js   |  2 +-
 4 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/js/README.md b/js/README.md
index a85af12..f68c416 100644
--- a/js/README.md
+++ b/js/README.md
@@ -68,11 +68,15 @@ _[Note] call make() before this function._
 | row   | <code>number</code> | 0 ~ moduleCount - 1 |
 | col   | <code>number</code> | 0 ~ moduleCount - 1 |
 
+#### setColors(foreground, background) => <code>void</code>
+Sets the foreground and background colors for the output formats. Default to black and white, respectively.
+_[Note] This has no effect on the ASCII output._
+
 #### createDataURL(cellSize, margin) => <code>string</code>
 #### createImgTag(cellSize, margin, alt) => <code>string</code>
 #### createSvgTag(cellSize, margin) => <code>string</code>
 #### createTableTag(cellSize, margin) => <code>string</code>
-#### createASCII(cellSize, margin) => <code>string</code>
+#### createASCII(cellSize, margin, inverted) => <code>string</code>
 Helper functions for HTML.
  _[Note] call make() before these functions._
 
@@ -81,6 +85,7 @@ Helper functions for HTML.
 | cellSize | <code>number</code> | default: 2            |
 | margin   | <code>number</code> | default: cellSize * 4 |
 | alt      | <code>string</code> | (optional)            |
+| inverted | <code>bool</code>   | (optional)            |
 
 #### createSvgTag(opts) => <code>string</code>
 
@@ -91,11 +96,11 @@ Helper functions for HTML.
 | opts.margin   | <code>number</code>  | default: cellSize * 4 |
 | opts.scalable | <code>boolean</code> | default: false        |
 
-#### renderTo2dContext(context, cellSize) => <code>void</code>
+#### renderTo2dContext(context, cellSize, margin) => <code>void</code>
 
---
+----
 
 This implementation is based on JIS X 0510:1999.
 
-The word 'QR Code' is registered trademark of DENSO WAVE INCORPORATED
-<br/>http://www.denso-wave.com/qrcode/faqpatent-e.html
+The word 'QR Code' is registered trademark of DENSO WAVE INCORPORATED.<br>
+https://www.qrcode.com/en/faq.html
diff --git a/js/qrcode.d.ts b/js/qrcode.d.ts
index b34952e..c5b90be 100644
--- a/js/qrcode.d.ts
+++ b/js/qrcode.d.ts
@@ -11,7 +11,7 @@
 //
 // The word 'QR Code' is registered trademark of
 // DENSO WAVE INCORPORATED
-//  http://www.denso-wave.com/qrcode/faqpatent-e.html
+//  https://www.qrcode.com/en/faq.html
 //
 //---------------------------------------------------------------------
 
@@ -31,8 +31,7 @@ interface QRCodeFactory {
   (typeNumber: TypeNumber, errorCorrectionLevel: ErrorCorrectionLevel) : QRCode;
   stringToBytes(s: string) : number[];
   stringToBytesFuncs : { [encoding : string] : (s: string) => number[] };
-  createStringToBytes(unicodeData: string, numChars: number) :
-    (s : string) => number[];
+  createStringToBytes(unicodeData: string, numChars: number) : (s : string) => number[];
 }
 
 interface QRCode {
@@ -40,14 +39,14 @@ interface QRCode {
   make() : void;
   getModuleCount() : number;
   isDark(row: number, col: number) : boolean;
-  createImgTag(cellSize?: number, margin?: number) : string;
-  createSvgTag(cellSize?: number, margin?: number) : string;
-  createSvgTag(opts? : { cellSize?: number, margin?: number,
-      scalable?: boolean }) : string;
+  setColors(foreground: string, background: string) : void;
+  createImgTag(cellSize?: number, margin?: number, alt?: string) : string;
+  createSvgTag(cellSize?: number, margin?: number, alt?: string, title?: string) : string;
+  createSvgTag(opts? : { cellSize?: number, margin?: number, scalable?: boolean }) : string;
   createDataURL(cellSize?: number, margin?: number) : string;
   createTableTag(cellSize?: number, margin?: number) : string;
-  createASCII(cellSize?: number, margin?: number) : string;
-  renderTo2dContext(context: CanvasRenderingContext2D, cellSize?: number): void;
+  createASCII(cellSize?: number, margin?: number, inverted?: boolean) : string;
+  renderTo2dContext(context: CanvasRenderingContext2D, cellSize?: number, margin?: number): void;
 }
 
 declare var qrcode : QRCodeFactory;
diff --git a/js/qrcode.js b/js/qrcode.js
index 5879f78..7af3c3e 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -11,7 +11,7 @@
 //
 // The word 'QR Code' is registered trademark of
 // DENSO WAVE INCORPORATED
-//  http://www.denso-wave.com/qrcode/faqpatent-e.html
+//  https://www.qrcode.com/en/faq.html
 //
 //---------------------------------------------------------------------
 
diff --git a/js/sample.js b/js/sample.js
index 8f4e006..c547565 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -52,7 +52,7 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
   try {
     qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
     
-    var qr = qrcode(typeNumber || 4, errorCorrectionLevel || 'M');
+    var qr = qrcode(typeNumber || 0, errorCorrectionLevel || 'M');
     qr.addData(text, mode);
     qr.make();
     qr.setColors(fg, bg);

From ad543381fc5b91e518f3d0e8bb5904a790552021 Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Sat, 22 Aug 2020 17:21:51 +0200
Subject: [PATCH 3/8] Decreased SVG size by about half by combining adjacent
 rects in a row

---
 js/qrcode.js  | 16 +++++++++-------
 js/sample.css |  2 +-
 js/sample.js  | 15 ++++++++++++---
 3 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/js/qrcode.js b/js/qrcode.js
index 7af3c3e..dff4f69 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -526,10 +526,7 @@ var qrcode = function() {
       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 ';
+      var c, c2, mc, r, mr, qrSvg='', rect;
 
       qrSvg += '<svg version="1.1" xmlns="http://www.w3.org/2000/svg"';
       qrSvg += !opts.scalable ? ' width="' + size + 'px" height="' + size + 'px"' : '';
@@ -545,12 +542,17 @@ var qrcode = function() {
       qrSvg += '<rect width="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
       qrSvg += '<path d="';
 
-      for (r = 0; r < _this.getModuleCount(); r += 1) {
+      for (r = 0; r < _this.getModuleCount(); r++) {
         mr = r * cellSize + margin;
-        for (c = 0; c < _this.getModuleCount(); c += 1) {
-          if (_this.isDark(r, c) ) {
+        for (c = 0; c < _this.getModuleCount(); c++) {
+          if (_this.isDark(r, c)) {
             mc = c*cellSize+margin;
+            for (c2 = c + 1; c2 < _this.getModuleCount() && _this.isDark(r, c2); c2++);
+            var cx = c2 - c;
+            rect = 'l' + (cellSize * cx) + ',0 0,' + cellSize +
+              ' -' + (cellSize * cx) + ',0 0,-' + cellSize + 'z ';
             qrSvg += 'M' + mc + ',' + mr + rect;
+            c = c2 - 1;
           }
         }
       }
diff --git a/js/sample.css b/js/sample.css
index 179e64a..50833e8 100644
--- a/js/sample.css
+++ b/js/sample.css
@@ -31,7 +31,7 @@ p
 	margin: 3em auto;
 	text-align: center;
 }
-#qr > *
+#qr > *:not(strong)
 {
 	outline: solid 1px #e0e0e0;
 }
diff --git a/js/sample.js b/js/sample.js
index c547565..a21e91b 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -58,13 +58,15 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
     qr.setColors(fg, bg);
 
     var size = qr.getModuleCount() * cellsize + padding * 2;
-    document.getElementById("qr-info").innerHTML = "Image size: " + size + "x" + size + " px";
+    var info = document.getElementById("qr-info");
+    info.innerHTML = "Image size: " + size + "x" + size + " px";
 
     switch (format) {
       case "svg":
         downloadFileName = "qr.svg";
         downloadType = "image/svg";
         downloadData = qr.createSvgTag(cellsize, padding);
+        info.innerHTML +=  ", file size: " + downloadData.length;
         return downloadData;
       case "gif":
       case "png":
@@ -77,29 +79,36 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
         downloadFileName = "qr." + format;
         downloadType = "";   // raw download data URL
         downloadData = canvas.toDataURL("image/" + format);
+        info.innerHTML +=  ", file size: " + (downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
         var warning = "";
-        if (format === "webp" && downloadData.match(/^data:image\/png/))
-          warning = "<br><br><strong>Attention:</strong> This browser cannot generate WEBP images and made a PNG instead.";
+        var m = downloadData.match(/^data:image\/([a-z0-9]+)/);
+        if (m && m[1] !== format)
+          warning = "<br><br><strong>Attention:</strong> This browser cannot generate " +
+            format.toUpperCase() + " images and made a " + m[1].toUpperCase() + " instead.";
         return '<img src="' + downloadData + '" width="' + canvas.width + '" height="' + canvas.height + '">' + warning;
       case "gif-direct":
         downloadFileName = "qr.gif";
         downloadType = "";   // raw download data URL
         downloadData = qr.createDataURL(cellsize, padding);
+        info.innerHTML +=  ", file size: " + (downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
         return qr.createImgTag(cellsize, padding);
       case "ascii":
         downloadFileName = "qr.txt";
         downloadType = "text/plain";
         downloadData = qr.createASCII(cellsize, padding);
+        info.innerHTML +=  ", file size: " + downloadData.length;
         return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
       case "ascii-inv":
         downloadFileName = "qr.txt";
         downloadType = "text/plain";
         downloadData = qr.createASCII(cellsize, padding, true);
+        info.innerHTML +=  ", file size: " + downloadData.length;
         return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
       case "table":
         downloadFileName = "qr.html";
         downloadType = "text/html";
         downloadData = qr.createTableTag(cellsize, padding);
+        info.innerHTML +=  ", file size: " + downloadData.length;
         return downloadData;
     }
   }

From 5859c3bbb143fdb2e706abb14aa8c8688b43eb8e Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Sun, 23 Aug 2020 11:41:12 +0200
Subject: [PATCH 4/8] Sample page: Show determined code size type, better
 format file size, improved error handling

---
 js/qrcode.js |  4 ++++
 js/sample.js | 38 +++++++++++++++++++++++++++-----------
 2 files changed, 31 insertions(+), 11 deletions(-)

diff --git a/js/qrcode.js b/js/qrcode.js
index dff4f69..d143a9d 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -454,6 +454,10 @@ var qrcode = function() {
       makeImpl(false, getBestMaskPattern() );
     };
 
+    _this.getTypeNumber = function() {
+      return _typeNumber;
+    };
+
     _this.setColors = function(foreground, background) {
       _foreground = simplifyColor(foreground);
       _background = simplifyColor(background);
diff --git a/js/sample.js b/js/sample.js
index a21e91b..9a46273 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -30,7 +30,8 @@ var body_loadHander = function() {
   update_qrcode();
 
   document.getElementById("download").addEventListener("click", function () {
-    download(downloadFileName, downloadType, downloadData);
+    if (downloadData)
+      download(downloadFileName, downloadType, downloadData);
   });
 };
 
@@ -49,24 +50,38 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
       mode = "Byte";
   }
 
+  var info = document.getElementById("qr-info");
+  downloadData = undefined;
+
+  var showLength = function (len) {
+    if (len < 1024)
+      len += " B";
+    else if (len < 10240)
+      len = Math.round(len * 100 / 1024) / 100 + " KiB";
+    else
+      len = Math.round(len * 10 / 1024) / 10 + " KiB";
+    info.innerHTML +=  ", file size: <b>" + len + "</b>";
+  };
+
   try {
     qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
-    
+
     var qr = qrcode(typeNumber || 0, errorCorrectionLevel || 'M');
     qr.addData(text, mode);
     qr.make();
     qr.setColors(fg, bg);
 
     var size = qr.getModuleCount() * cellsize + padding * 2;
-    var info = document.getElementById("qr-info");
-    info.innerHTML = "Image size: " + size + "x" + size + " px";
+    info.innerHTML = "Size type: <b>" + qr.getTypeNumber() + "</b>, " +
+      "code columns: <b>" + qr.getModuleCount() + "</b>, " +
+      "image size: <b>" + size + "x" + size + " px</b>";
 
     switch (format) {
       case "svg":
         downloadFileName = "qr.svg";
         downloadType = "image/svg";
         downloadData = qr.createSvgTag(cellsize, padding);
-        info.innerHTML +=  ", file size: " + downloadData.length;
+        showLength(downloadData.length);
         return downloadData;
       case "gif":
       case "png":
@@ -79,7 +94,7 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
         downloadFileName = "qr." + format;
         downloadType = "";   // raw download data URL
         downloadData = canvas.toDataURL("image/" + format);
-        info.innerHTML +=  ", file size: " + (downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
+        showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
         var warning = "";
         var m = downloadData.match(/^data:image\/([a-z0-9]+)/);
         if (m && m[1] !== format)
@@ -90,30 +105,31 @@ var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectio
         downloadFileName = "qr.gif";
         downloadType = "";   // raw download data URL
         downloadData = qr.createDataURL(cellsize, padding);
-        info.innerHTML +=  ", file size: " + (downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
+        showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
         return qr.createImgTag(cellsize, padding);
       case "ascii":
         downloadFileName = "qr.txt";
         downloadType = "text/plain";
         downloadData = qr.createASCII(cellsize, padding);
-        info.innerHTML +=  ", file size: " + downloadData.length;
+        showLength(downloadData.length);
         return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
       case "ascii-inv":
         downloadFileName = "qr.txt";
         downloadType = "text/plain";
         downloadData = qr.createASCII(cellsize, padding, true);
-        info.innerHTML +=  ", file size: " + downloadData.length;
+        showLength(downloadData.length);
         return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
       case "table":
         downloadFileName = "qr.html";
         downloadType = "text/html";
         downloadData = qr.createTableTag(cellsize, padding);
-        info.innerHTML +=  ", file size: " + downloadData.length;
+        showLength(downloadData.length);
         return downloadData;
     }
   }
   catch (error) {
-    return "Error: " + error;
+    info.innerHTML = "Error: " + error;
+    return "";
   }
 };
 

From e5ea16364e965972e5f25e42bfcfbe1fd188240e Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Wed, 2 Jun 2021 20:17:45 +0200
Subject: [PATCH 5/8] Decreased SVG size by ~30% with SVG path abbreviations
 h/v instead of l

* Simple rectangles with a fixed geometry can be expressed shorter
* Removed spaces between path commands and two extra spaces from the SVG
---
 js/qrcode.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/js/qrcode.js b/js/qrcode.js
index d143a9d..0a4c1ca 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -534,7 +534,7 @@ var qrcode = function() {
 
       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 += ' 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() ) + '"' : '';
@@ -546,22 +546,23 @@ var qrcode = function() {
       qrSvg += '<rect width="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
       qrSvg += '<path d="';
 
+      var d = '';
       for (r = 0; r < _this.getModuleCount(); r++) {
         mr = r * cellSize + margin;
         for (c = 0; c < _this.getModuleCount(); c++) {
           if (_this.isDark(r, c)) {
-            mc = c*cellSize+margin;
+            mc = c * cellSize + margin;
             for (c2 = c + 1; c2 < _this.getModuleCount() && _this.isDark(r, c2); c2++);
             var cx = c2 - c;
-            rect = 'l' + (cellSize * cx) + ',0 0,' + cellSize +
-              ' -' + (cellSize * cx) + ',0 0,-' + cellSize + 'z ';
-            qrSvg += 'M' + mc + ',' + mr + rect;
+            rect = 'h' + (cellSize * cx) + 'v' + cellSize +
+              'h-' + (cellSize * cx) + 'v-' + cellSize + 'z ';
+            d += 'M' + mc + ',' + mr + rect;
             c = c2 - 1;
           }
         }
       }
 
-      qrSvg += '" stroke="transparent" fill="' + _foreground + '"/>';
+      qrSvg += d.trim() + '" stroke="transparent" fill="' + _foreground + '"/>';
       qrSvg += '</svg>';
 
       return qrSvg;

From 6e02b9899782e2ab8e6a7a4c707a9eb1e3a61c17 Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Wed, 2 Jun 2021 21:14:24 +0200
Subject: [PATCH 6/8] Code formatting (needed for more extensive
 optimisations), removed most ESLint warnings

---
 js/qrcode.js   | 4432 +++++++++++++++++++++++-------------------------
 js/sample.html |  175 +-
 js/sample.js   |  300 ++--
 3 files changed, 2381 insertions(+), 2526 deletions(-)

diff --git a/js/qrcode.js b/js/qrcode.js
index 0a4c1ca..3fe276a 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -15,2306 +15,2162 @@
 //
 //---------------------------------------------------------------------
 
-var qrcode = function() {
+var qrcode = function () {
+
+	//---------------------------------------------------------------------
+	// qrcode
+	//---------------------------------------------------------------------
+
+	/**
+	 * qrcode
+	 * @param typeNumber 1 to 40
+	 * @param errorCorrectionLevel 'L','M','Q','H'
+	 */
+	var qrcode = function (typeNumber, errorCorrectionLevel) {
+		let PAD0 = 0xEC;
+		let PAD1 = 0x11;
+
+		let _typeNumber = typeNumber;
+		let _errorCorrectionLevel = QRErrorCorrectionLevel[errorCorrectionLevel];
+		let _modules = null;
+		let _moduleCount = 0;
+		let _dataCache = null;
+		let _dataList = [];
+		let _foreground = "black";
+		let _background = "white";
+		let _this = {};
+
+		var makeImpl = function (test, maskPattern) {
+			_moduleCount = _typeNumber * 4 + 17;
+			_modules = function (moduleCount) {
+				let modules = new Array(moduleCount);
+				for (let row = 0; row < moduleCount; row++) {
+					modules[row] = new Array(moduleCount);
+					for (let col = 0; col < moduleCount; col++) {
+						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 (let r = -1; r <= 7; r++) {
+				if (row + r <= -1 || row + r >= _moduleCount)
+					continue;
+				for (let c = -1; c <= 7; c++) {
+					if (col + c <= -1 || col + c >= _moduleCount)
+						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 () {
+			let minLostPoint = 0;
+			let pattern = 0;
+
+			for (let i = 0; i < 8; i++) {
+				makeImpl(true, i);
+
+				let lostPoint = QRUtil.getLostPoint(_this);
+				if (i === 0 || minLostPoint > lostPoint) {
+					minLostPoint = lostPoint;
+					pattern = i;
+				}
+			}
+			return pattern;
+		};
+
+		var setupTimingPattern = function () {
+			for (let r = 8; r < _moduleCount - 8; r++) {
+				if (_modules[r][6] !== null)
+					continue;
+				_modules[r][6] = (r % 2 === 0);
+			}
+			for (let c = 8; c < _moduleCount - 8; c++) {
+				if (_modules[6][c] !== null)
+					continue;
+				_modules[6][c] = (c % 2 === 0);
+			}
+		};
+
+		var setupPositionAdjustPattern = function () {
+			let pos = QRUtil.getPatternPosition(_typeNumber);
+
+			for (let i = 0; i < pos.length; i++) {
+				for (let j = 0; j < pos.length; j++) {
+					let row = pos[i];
+					let col = pos[j];
+
+					if (_modules[row][col] !== null)
+						continue;
+
+					for (let r = -2; r <= 2; r++) {
+						for (let c = -2; c <= 2; c++) {
+							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) {
+			let bits = QRUtil.getBCHTypeNumber(_typeNumber);
+
+			for (let i = 0; i < 18; i++) {
+				let mod = (!test && ((bits >> i) & 1) === 1);
+				_modules[Math.floor(i / 3)][i % 3 + _moduleCount - 8 - 3] = mod;
+			}
+			for (let i = 0; i < 18; i++) {
+				let mod = (!test && ((bits >> i) & 1) === 1);
+				_modules[i % 3 + _moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
+			}
+		};
+
+		var setupTypeInfo = function (test, maskPattern) {
+			let data = (_errorCorrectionLevel << 3) | maskPattern;
+			let bits = QRUtil.getBCHTypeInfo(data);
+
+			// vertical
+			for (let i = 0; i < 15; i++) {
+				let 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 (let i = 0; i < 15; i++) {
+				let 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) {
+			let inc = -1;
+			let row = _moduleCount - 1;
+			let bitIndex = 7;
+			let byteIndex = 0;
+			let maskFunc = QRUtil.getMaskFunction(maskPattern);
+
+			for (let col = _moduleCount - 1; col > 0; col -= 2) {
+				if (col === 6)
+					col -= 1;
+
+				while (true) {
+					for (let c = 0; c < 2; c++) {
+						if (_modules[row][col - c] === null) {
+							let dark = false;
+							if (byteIndex < data.length)
+								dark = (((data[byteIndex] >>> bitIndex) & 1) === 1);
+
+							let mask = maskFunc(row, col - c);
+							if (mask)
+								dark = !dark;
+
+							_modules[row][col - c] = dark;
+							bitIndex -= 1;
+
+							if (bitIndex === -1) {
+								byteIndex++;
+								bitIndex = 7;
+							}
+						}
+					}
+
+					row += inc;
+					if (row < 0 || row >= _moduleCount) {
+						row -= inc;
+						inc = -inc;
+						break;
+					}
+				}
+			}
+		};
+
+		var createBytes = function (buffer, rsBlocks) {
+			let offset = 0;
+			let maxDcCount = 0;
+			let maxEcCount = 0;
+			let dcdata = new Array(rsBlocks.length);
+			let ecdata = new Array(rsBlocks.length);
+
+			for (let r = 0; r < rsBlocks.length; r++) {
+				let dcCount = rsBlocks[r].dataCount;
+				let ecCount = rsBlocks[r].totalCount - dcCount;
+
+				maxDcCount = Math.max(maxDcCount, dcCount);
+				maxEcCount = Math.max(maxEcCount, ecCount);
+
+				dcdata[r] = new Array(dcCount);
+
+				for (let i = 0; i < dcdata[r].length; i++) {
+					dcdata[r][i] = 0xff & buffer.getBuffer()[i + offset];
+				}
+				offset += dcCount;
+
+				let rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
+				let rawPoly = qrPolynomial(dcdata[r], rsPoly.getLength() - 1);
+
+				let modPoly = rawPoly.mod(rsPoly);
+				ecdata[r] = new Array(rsPoly.getLength() - 1);
+				for (let i = 0; i < ecdata[r].length; i++) {
+					let modIndex = i + modPoly.getLength() - ecdata[r].length;
+					ecdata[r][i] = (modIndex >= 0) ? modPoly.getAt(modIndex) : 0;
+				}
+			}
+
+			let totalCodeCount = 0;
+			for (let i = 0; i < rsBlocks.length; i++) {
+				totalCodeCount += rsBlocks[i].totalCount;
+			}
+
+			let data = new Array(totalCodeCount);
+			let index = 0;
+
+			for (let i = 0; i < maxDcCount; i++) {
+				for (let r = 0; r < rsBlocks.length; r++) {
+					if (i < dcdata[r].length) {
+						data[index] = dcdata[r][i];
+						index++;
+					}
+				}
+			}
+			for (let i = 0; i < maxEcCount; i++) {
+				for (let r = 0; r < rsBlocks.length; r++) {
+					if (i < ecdata[r].length) {
+						data[index] = ecdata[r][i];
+						index++;
+					}
+				}
+			}
+			return data;
+		};
+
+		var createData = function (typeNumber, errorCorrectionLevel, dataList) {
+			let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectionLevel);
+			let buffer = qrBitBuffer();
+
+			for (let i = 0; i < dataList.length; i++) {
+				let data = dataList[i];
+				buffer.put(data.getMode(), 4);
+				buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber));
+				data.write(buffer);
+			}
+
+			// calc num max data.
+			let totalDataCount = 0;
+			for (let i = 0; i < rsBlocks.length; i++) {
+				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';
+
+			let 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 || row >= _moduleCount || col < 0 || col >= _moduleCount) {
+				throw row + ',' + col;
+			}
+			return _modules[row][col];
+		};
+
+		_this.getModuleCount = function () {
+			return _moduleCount;
+		};
+
+		_this.make = function () {
+			if (_typeNumber < 1) {
+				let typeNumber = 1;
+
+				for (; typeNumber < 40; typeNumber++) {
+					let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, _errorCorrectionLevel);
+					let buffer = qrBitBuffer();
+
+					for (let i = 0; i < _dataList.length; i++) {
+						let data = _dataList[i];
+						buffer.put(data.getMode(), 4);
+						buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber));
+						data.write(buffer);
+					}
+
+					let totalDataCount = 0;
+					for (let i = 0; i < rsBlocks.length; i++) {
+						totalDataCount += rsBlocks[i].dataCount;
+					}
+
+					if (buffer.getLengthInBits() <= totalDataCount * 8) {
+						break;
+					}
+				}
+
+				_typeNumber = typeNumber;
+			}
+
+			makeImpl(false, getBestMaskPattern());
+		};
+
+		_this.getTypeNumber = function () {
+			return _typeNumber;
+		};
+
+		_this.setColors = function (foreground, background) {
+			_foreground = simplifyColor(foreground);
+			_background = simplifyColor(background);
+
+			function simplifyColor(c) {
+				if (c.match(/^#[0-9A-Fa-f]{6}$/) && c[1] === c[2] && c[3] === c[4] && c[5] === c[6])
+					c = "#" + c[1] + c[3] + c[5];
+				return c;
+			}
+		};
+
+		_this.createTableTag = function (cellSize, margin) {
+
+			cellSize = cellSize || 2;
+			margin = (typeof margin === 'undefined') ? cellSize * 4 : margin;
+
+			let qrHtml = '';
+			qrHtml += '<table style="border: solid ' + margin + 'px ' + _background + ';';
+			qrHtml += ' border-collapse: collapse;';
+			qrHtml += ' padding: 0px;';
+			qrHtml += '">';
+
+			for (let r = 0; r < _this.getModuleCount(); r++) {
+				qrHtml += '<tr>';
+				for (let c = 0; c < _this.getModuleCount(); c++) {
+					qrHtml += '<td style="border: none;';
+					qrHtml += ' border-collapse: collapse;';
+					qrHtml += ' padding: 0px; margin: 0px;';
+					qrHtml += ' width: ' + cellSize + 'px;';
+					qrHtml += ' height: ' + cellSize + 'px;';
+					qrHtml += ' background-color: ' + (_this.isDark(r, c) ? _foreground : _background) + ';';
+					qrHtml += '"/>';
+				}
+				qrHtml += '</tr>';
+			}
+			qrHtml += '</table>';
+			return qrHtml;
+		};
+
+		_this.createSvgTag = function (cellSize, margin, alt, title) {
+			let 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;
+
+			let size = _this.getModuleCount() * cellSize + margin * 2;
+			let c, c2, mc, r, mr, qrSvg = '', rect;
+
+			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="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
+			qrSvg += '<path d="';
+
+			let d = '';
+			for (r = 0; r < _this.getModuleCount(); r++) {
+				mr = r * cellSize + margin;
+				for (c = 0; c < _this.getModuleCount(); c++) {
+					if (_this.isDark(r, c)) {
+						mc = c * cellSize + margin;
+						for (c2 = c + 1; c2 < _this.getModuleCount() && _this.isDark(r, c2); c2++);
+						let cx = c2 - c;
+						rect = 'h' + (cellSize * cx) + 'v' + cellSize +
+							'h-' + (cellSize * cx) + 'v-' + cellSize + 'z ';
+						d += 'M' + mc + ',' + mr + rect;
+						c = c2 - 1;
+					}
+				}
+			}
+
+			qrSvg += d.trim() + '" stroke="transparent" fill="' + _foreground + '"/>';
+			qrSvg += '</svg>';
+
+			return qrSvg;
+		};
+
+		_this.createDataURL = function (cellSize, margin) {
+			cellSize = cellSize || 2;
+			margin = (typeof margin === 'undefined') ? cellSize * 4 : margin;
+
+			let size = _this.getModuleCount() * cellSize + margin * 2;
+			let min = margin;
+			let max = size - margin;
+
+			return createDataURL(size, size, _foreground, _background, function (x, y) {
+				if (min <= x && x < max && min <= y && y < max) {
+					let c = Math.floor((x - min) / cellSize);
+					let 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;
+
+			let size = _this.getModuleCount() * cellSize + margin * 2;
+
+			let img = '';
+			img += '<img src="' + _this.createDataURL(cellSize, margin) + '"';
+			img += ' width="' + size + '"';
+			img += ' height="' + size + '"';
+			if (alt)
+				img += ' alt="' + escapeXml(alt) + '"';
+			img += '/>';
+			return img;
+		};
+
+		var escapeXml = function (s) {
+			let escaped = '';
+			for (let i = 0; i < s.length; i++) {
+				let 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, inverted) {
+			let cellSize = 1;
+			margin = (typeof margin === 'undefined') ? cellSize * 2 : margin;
+
+			let size = _this.getModuleCount() * cellSize + margin * 2;
+			let min = margin;
+			let max = size - margin;
+			let y, x, r1, r2, p;
+
+			let blocks = {
+				'██': '█',
+				'█ ': '▀',
+				' █': '▄',
+				'  ': '\xa0'
+			};
+			let blocksLastLineNoMargin = {
+				'██': '▀',
+				'█ ': '▀',
+				' █': '\xa0',
+				'  ': '\xa0'
+			};
+
+			let 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++) {
+					p = inverted ? '█' : ' ';
+
+					if (min <= x && x < max && min <= y && y < max && _this.isDark(r1, Math.floor((x - min) / cellSize))) {
+						p = inverted ? ' ' : '█';
+					}
+
+					if (min <= x && x < max && min <= y + 1 && y + 1 < max && _this.isDark(r2, Math.floor((x - min) / cellSize))) {
+						p += inverted ? ' ' : '█';
+					}
+					else {
+						p += inverted ? '█' : ' ';
+					}
+
+					// 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(inverted ? '▀' : '\xa0');
+			}
+			return ascii.substring(0, ascii.length - 1);
+		};
+
+		_this.createASCII = function (cellSize, margin, inverted) {
+			cellSize = cellSize || 1;
+			if (cellSize < 2)
+				return _createHalfASCII(margin, inverted);
+
+			cellSize -= 1;
+			margin = (typeof margin === 'undefined') ? cellSize * 2 : margin / (cellSize + 1) * cellSize;
+
+			let size = _this.getModuleCount() * cellSize + margin * 2;
+			let min = margin;
+			let max = size - margin;
+			let y, x, r, p;
+
+			let white = '\xa0\xa0';
+			let black = '██';
+			if (inverted) {
+				let b = black;
+				black = white;
+				white = b;
+			}
+
+			let ascii = '';
+			let line = '';
+			for (y = 0; y < size; y++) {
+				r = Math.floor((y - min) / cellSize);
+				line = '';
+				for (x = 0; x < size; x++) {
+					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;
+				}
+				ascii += line + '\n';
+			}
+			return ascii.substring(0, ascii.length - 1);
+		};
+
+		_this.renderTo2dContext = function (context, cellSize, margin) {
+			cellSize = cellSize || 2;
+			margin = (typeof margin === 'undefined') ? cellSize * 4 : margin;
+			let length = _this.getModuleCount();
+			if (margin > 0) {
+				context.fillStyle = _background;
+				context.fillRect(0, 0, length * cellSize + margin * 2, length * cellSize + margin * 2);
+			}
+			for (let row = 0; row < length; row++) {
+				for (let col = 0; col < length; col++) {
+					context.fillStyle = _this.isDark(row, col) ? _foreground : _background;
+					context.fillRect(margin + col * cellSize, margin + row * cellSize, cellSize, cellSize);
+				}
+			}
+		}
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// qrcode.stringToBytes
+	//---------------------------------------------------------------------
+
+	qrcode.stringToBytesFuncs = {
+		'default': function (s) {
+			let bytes = [];
+			for (let i = 0; i < s.length; i++) {
+				let 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 () {
+			let bin = base64DecodeInputStream(unicodeData);
+			let read = function () {
+				let b = bin.read();
+				if (b === -1) throw 'eof';
+				return b;
+			};
+
+			let count = 0;
+			let unicodeMap = {};
+			while (true) {
+				let b0 = bin.read();
+				if (b0 === -1) break;
+				let b1 = read();
+				let b2 = read();
+				let b3 = read();
+				let k = String.fromCharCode((b0 << 8) | b1);
+				let v = (b2 << 8) | b3;
+				unicodeMap[k] = v;
+				count++;
+			}
+			if (count !== numChars) {
+				throw count + ' != ' + numChars;
+			}
+			return unicodeMap;
+		}();
+
+		let unknownChar = '?'.charCodeAt(0);
+
+		return function (s) {
+			let bytes = [];
+			for (let i = 0; i < s.length; i++) {
+				let c = s.charCodeAt(i);
+				if (c < 128) {
+					bytes.push(c);
+				}
+				else {
+					let 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 () {
+		let 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]
+		];
+		let G15 = (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0);
+		let G18 = (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0);
+		let G15_MASK = (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1);
+
+		let _this = {};
+
+		var getBCHDigit = function (data) {
+			let digit = 0;
+			while (data !== 0) {
+				digit++;
+				data >>>= 1;
+			}
+			return digit;
+		};
+
+		_this.getBCHTypeInfo = function (data) {
+			let 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) {
+			let 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) {
+			let a = qrPolynomial([1], 0);
+			for (let i = 0; i < errorCorrectLength; i++) {
+				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) {
+			let moduleCount = qrcode.getModuleCount();
+			let lostPoint = 0;
+
+			// LEVEL1
+
+			for (let row = 0; row < moduleCount; row++) {
+				for (let col = 0; col < moduleCount; col++) {
+					let sameCount = 0;
+					let dark = qrcode.isDark(row, col);
+
+					for (let r = -1; r <= 1; r++) {
+						if (row + r < 0 || moduleCount <= row + r)
+							continue;
+
+						for (let c = -1; c <= 1; c++) {
+							if (col + c < 0 || moduleCount <= col + c)
+								continue;
+							if (r === 0 && c === 0)
+								continue;
+
+							if (dark === qrcode.isDark(row + r, col + c))
+								sameCount++;
+						}
+					}
+
+					if (sameCount > 5) {
+						lostPoint += (3 + sameCount - 5);
+					}
+				}
+			};
+
+			// LEVEL2
+
+			for (let row = 0; row < moduleCount - 1; row++) {
+				for (let col = 0; col < moduleCount - 1; col++) {
+					let count = 0;
+					if (qrcode.isDark(row, col)) count++;
+					if (qrcode.isDark(row + 1, col)) count++;
+					if (qrcode.isDark(row, col + 1)) count++;
+					if (qrcode.isDark(row + 1, col + 1)) count++;
+					if (count === 0 || count === 4) {
+						lostPoint += 3;
+					}
+				}
+			}
+
+			// LEVEL3
+
+			for (let row = 0; row < moduleCount; row++) {
+				for (let col = 0; col < moduleCount - 6; col++) {
+					if (qrcode.isDark(row, col) &&
+						!qrcode.isDark(row, col + 1) &&
+						qrcode.isDark(row, col + 2) &&
+						qrcode.isDark(row, col + 3) &&
+						qrcode.isDark(row, col + 4) &&
+						!qrcode.isDark(row, col + 5) &&
+						qrcode.isDark(row, col + 6)) {
+						lostPoint += 40;
+					}
+				}
+			}
+
+			for (let col = 0; col < moduleCount; col++) {
+				for (let row = 0; row < moduleCount - 6; row++) {
+					if (qrcode.isDark(row, col) &&
+						!qrcode.isDark(row + 1, col) &&
+						qrcode.isDark(row + 2, col) &&
+						qrcode.isDark(row + 3, col) &&
+						qrcode.isDark(row + 4, col) &&
+						!qrcode.isDark(row + 5, col) &&
+						qrcode.isDark(row + 6, col)) {
+						lostPoint += 40;
+					}
+				}
+			}
+
+			// LEVEL4
+
+			let darkCount = 0;
+
+			for (let col = 0; col < moduleCount; col++) {
+				for (let row = 0; row < moduleCount; row++) {
+					if (qrcode.isDark(row, col)) {
+						darkCount++;
+					}
+				}
+			}
+
+			let ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
+			lostPoint += ratio * 10;
+			return lostPoint;
+		};
+
+		return _this;
+	}();
+
+	//---------------------------------------------------------------------
+	// QRMath
+	//---------------------------------------------------------------------
+
+	var QRMath = function () {
+		let EXP_TABLE = new Array(256);
+		let LOG_TABLE = new Array(256);
+
+		// initialize tables
+		for (let i = 0; i < 8; i++) {
+			EXP_TABLE[i] = 1 << i;
+		}
+		for (let i = 8; i < 256; i++) {
+			EXP_TABLE[i] = EXP_TABLE[i - 4] ^
+				EXP_TABLE[i - 5] ^
+				EXP_TABLE[i - 6] ^
+				EXP_TABLE[i - 8];
+		}
+		for (let i = 0; i < 255; i++) {
+			LOG_TABLE[EXP_TABLE[i]] = i;
+		}
+
+		let _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;
+
+		let _num = function () {
+			let offset = 0;
+			while (offset < num.length && num[offset] === 0) {
+				offset++;
+			}
+			let _num = new Array(num.length - offset + shift);
+			for (let i = 0; i < num.length - offset; i++) {
+				_num[i] = num[i + offset];
+			}
+			return _num;
+		}();
+
+		let _this = {};
+
+		_this.getAt = function (index) {
+			return _num[index];
+		};
+
+		_this.getLength = function () {
+			return _num.length;
+		};
+
+		_this.multiply = function (e) {
+			let num = new Array(_this.getLength() + e.getLength() - 1);
+			for (let i = 0; i < _this.getLength(); i++) {
+				for (let j = 0; j < e.getLength(); j++) {
+					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;
+
+			let ratio = QRMath.glog(_this.getAt(0)) - QRMath.glog(e.getAt(0));
+			let num = new Array(_this.getLength());
+			for (let i = 0; i < _this.getLength(); i++) {
+				num[i] = _this.getAt(i);
+			}
+			for (let i = 0; i < e.getLength(); i++) {
+				num[i] ^= QRMath.gexp(QRMath.glog(e.getAt(i)) + ratio);
+			}
+
+			// recursive call
+			return qrPolynomial(num, 0).mod(e);
+		};
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// QRRSBlock
+	//---------------------------------------------------------------------
+
+	var QRRSBlock = function () {
+		let 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) {
+			let _this = {};
+			_this.totalCount = totalCount;
+			_this.dataCount = dataCount;
+			return _this;
+		};
+
+		let _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) {
+			let rsBlock = getRsBlockTable(typeNumber, errorCorrectionLevel);
+			if (typeof rsBlock === 'undefined')
+				throw 'bad rs block @ typeNumber:' + typeNumber + '/errorCorrectionLevel:' + errorCorrectionLevel;
+
+			let length = rsBlock.length / 3;
+			let list = [];
+
+			for (let i = 0; i < length; i++) {
+				let count = rsBlock[i * 3 + 0];
+				let totalCount = rsBlock[i * 3 + 1];
+				let dataCount = rsBlock[i * 3 + 2];
+
+				for (let j = 0; j < count; j++) {
+					list.push(qrRSBlock(totalCount, dataCount));
+				}
+			}
+			return list;
+		};
+
+		return _this;
+	}();
+
+	//---------------------------------------------------------------------
+	// qrBitBuffer
+	//---------------------------------------------------------------------
+
+	var qrBitBuffer = function () {
+		let _buffer = [];
+		let _length = 0;
+		let _this = {};
+
+		_this.getBuffer = function () {
+			return _buffer;
+		};
+
+		_this.getAt = function (index) {
+			let bufIndex = Math.floor(index / 8);
+			return ((_buffer[bufIndex] >>> (7 - index % 8)) & 1) === 1;
+		};
+
+		_this.put = function (num, length) {
+			for (let i = 0; i < length; i++) {
+				_this.putBit(((num >>> (length - i - 1)) & 1) === 1);
+			}
+		};
+
+		_this.getLengthInBits = function () {
+			return _length;
+		};
+
+		_this.putBit = function (bit) {
+			let bufIndex = Math.floor(_length / 8);
+			if (_buffer.length <= bufIndex) {
+				_buffer.push(0);
+			}
+			if (bit) {
+				_buffer[bufIndex] |= (0x80 >>> (_length % 8));
+			}
+			_length++;
+		};
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// qrNumber
+	//---------------------------------------------------------------------
+
+	var qrNumber = function (data) {
+		let _mode = QRMode.MODE_NUMBER;
+		let _data = data;
+		let _this = {};
+
+		_this.getMode = function () {
+			return _mode;
+		};
+
+		_this.getLength = function (buffer) {
+			return _data.length;
+		};
+
+		_this.write = function (buffer) {
+			let data = _data;
+			let 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) {
+			let num = 0;
+			for (let i = 0; i < s.length; i++) {
+				num = num * 10 + charToNum(s.charAt(i));
+			}
+			return num;
+		};
+
+		var charToNum = 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) {
+		let _mode = QRMode.MODE_ALPHA_NUM;
+		let _data = data;
+		let _this = {};
+
+		_this.getMode = function () {
+			return _mode;
+		};
+
+		_this.getLength = function (buffer) {
+			return _data.length;
+		};
+
+		_this.write = function (buffer) {
+			let s = _data;
+			let 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) {
+		let _mode = QRMode.MODE_8BIT_BYTE;
+		let _data = data;
+		let _bytes = qrcode.stringToBytes(data);
+		let _this = {};
+
+		_this.getMode = function () {
+			return _mode;
+		};
+
+		_this.getLength = function (buffer) {
+			return _bytes.length;
+		};
+
+		_this.write = function (buffer) {
+			for (let i = 0; i < _bytes.length; i++) {
+				buffer.put(_bytes[i], 8);
+			}
+		};
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// qrKanji
+	//---------------------------------------------------------------------
+
+	var qrKanji = function (data) {
+		let _mode = QRMode.MODE_KANJI;
+		let _data = data;
+
+		let stringToBytes = qrcode.stringToBytesFuncs['SJIS'];
+		if (!stringToBytes)
+			throw 'sjis not supported.';
+
+		!function (c, code) {
+			// self test for sjis support.
+			let test = stringToBytes(c);
+			if (test.length !== 2 || ((test[0] << 8) | test[1]) !== code) {
+				throw 'sjis not supported.';
+			}
+		}('\u53cb', 0x9746);
+
+		let _bytes = stringToBytes(data);
+
+		let _this = {};
+
+		_this.getMode = function () {
+			return _mode;
+		};
+
+		_this.getLength = function (buffer) {
+			return ~~(_bytes.length / 2);
+		};
+
+		_this.write = function (buffer) {
+			let data = _bytes;
+			let i = 0;
+
+			while (i + 1 < data.length) {
+				let 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 () {
+		let _bytes = [];
+		let _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 (let i = 0; i < len; i++) {
+				_this.writeByte(b[i + off]);
+			}
+		};
+
+		_this.writeString = function (s) {
+			for (let i = 0; i < s.length; i++) {
+				_this.writeByte(s.charCodeAt(i));
+			}
+		};
+
+		_this.toByteArray = function () {
+			return _bytes;
+		};
+
+		_this.toString = function () {
+			let s = '';
+			s += '[';
+			for (let i = 0; i < _bytes.length; i++) {
+				if (i > 0)
+					s += ',';
+				s += _bytes[i];
+			}
+			s += ']';
+			return s;
+		};
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// base64EncodeOutputStream
+	//---------------------------------------------------------------------
+
+	var base64EncodeOutputStream = function () {
+		let _buffer = 0;
+		let _buflen = 0;
+		let _length = 0;
+		let _base64 = '';
+		let _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++;
+
+			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
+				let padlen = 3 - _length % 3;
+				for (let i = 0; i < padlen; i++) {
+					_base64 += '=';
+				}
+			}
+		};
+
+		_this.toString = function () {
+			return _base64;
+		};
+
+		return _this;
+	};
+
+	//---------------------------------------------------------------------
+	// base64DecodeInputStream
+	//---------------------------------------------------------------------
+
+	var base64DecodeInputStream = function (str) {
+		let _str = str;
+		let _pos = 0;
+		let _buffer = 0;
+		let _buflen = 0;
+		let _this = {};
+
+		_this.read = function () {
+			while (_buflen < 8) {
+				if (_pos >= _str.length) {
+					if (_buflen === 0)
+						return -1;
+					throw 'unexpected end of file./' + _buflen;
+				}
+
+				let c = _str.charAt(_pos);
+				_pos++;
+
+				if (c === '=') {
+					_buflen = 0;
+					return -1;
+				}
+				else if (c.match(/^\s$/)) {
+					// ignore if whitespace.
+					continue;
+				}
+
+				_buffer = (_buffer << 6) | decode(c.charCodeAt(0));
+				_buflen += 6;
+			}
+
+			let 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, foreground, background) {
+		let _width = width;
+		let _height = height;
+		let _data = new Array(width * height);
+		let _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
+
+			// foreground
+			let fg = parseColor(foreground, "#000");
+			out.writeByte(fg[0]);
+			out.writeByte(fg[1]);
+			out.writeByte(fg[2]);
+
+			// background
+			let bg = parseColor(background, "#fff");
+			out.writeByte(bg[0]);
+			out.writeByte(bg[1]);
+			out.writeByte(bg[2]);
+
+			//---------------------------------
+			// Image Descriptor
+
+			out.writeString(',');
+			out.writeShort(0);
+			out.writeShort(0);
+			out.writeShort(_width);
+			out.writeShort(_height);
+			out.writeByte(0);
+
+			//---------------------------------
+			// Local Color Map
+
+			//---------------------------------
+			// Raster Data
+
+			let lzwMinCodeSize = 2;
+			let raster = getLZWRaster(lzwMinCodeSize);
+
+			out.writeByte(lzwMinCodeSize);
+
+			let 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(';');
+		};
+
+		function parseColor(c, fallback) {
+			c = c.toLowerCase();
+			if (c.match(/^#[0-9a-f]{3}$/))
+				return [parseInt(c[1] + c[1], 16), parseInt(c[2] + c[2], 16), parseInt(c[3] + c[3], 16)];
+			if (c.match(/^#[0-9a-f]{6}$/))
+				return [parseInt(c[1] + c[2], 16), parseInt(c[3] + c[4], 16), parseInt(c[5] + c[6], 16)];
+			return parseColor(fallback);
+		}
+
+		var bitOutputStream = function (out) {
+			let _out = out;
+			let _bitLength = 0;
+			let _bitBuffer = 0;
+			let _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) {
+			let clearCode = 1 << lzwMinCodeSize;
+			let endCode = (1 << lzwMinCodeSize) + 1;
+			let bitLength = lzwMinCodeSize + 1;
+
+			// Setup LZWTable
+			let table = lzwTable();
+
+			for (let i = 0; i < clearCode; i++) {
+				table.add(String.fromCharCode(i));
+			}
+			table.add(String.fromCharCode(clearCode));
+			table.add(String.fromCharCode(endCode));
+
+			let byteOut = byteArrayOutputStream();
+			let bitOut = bitOutputStream(byteOut);
+
+			// clear code
+			bitOut.write(clearCode, bitLength);
+
+			let dataIndex = 0;
+
+			let s = String.fromCharCode(_data[dataIndex]);
+			dataIndex++;
+
+			while (dataIndex < _data.length) {
+				let c = String.fromCharCode(_data[dataIndex]);
+				dataIndex++;
+
+				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++;
+						}
+						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 () {
+			let _map = {};
+			let _size = 0;
+			let _this = {};
+
+			_this.add = function (key) {
+				if (_this.contains(key))
+					throw 'dup key:' + key;
+
+				_map[key] = _size;
+				_size++;
+			};
+
+			_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;
+	};
 
-  //---------------------------------------------------------------------
-  // qrcode
-  //---------------------------------------------------------------------
+	var createDataURL = function (width, height, foreground, background, getPixel) {
+		let gif = gifImage(width, height, foreground, background);
+		for (let y = 0; y < height; y++) {
+			for (let x = 0; x < width; x++) {
+				gif.setPixel(x, y, getPixel(x, y));
+			}
+		}
 
-  /**
-   * 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 _foreground = "black";
-    var _background = "white";
+		let b = byteArrayOutputStream();
+		gif.write(b);
 
-    var _this = {};
+		let base64 = base64EncodeOutputStream();
+		let bytes = b.toByteArray();
+		for (let i = 0; i < bytes.length; i++) {
+			base64.writeByte(bytes[i]);
+		}
+		base64.flush();
 
-    var makeImpl = function(test, maskPattern) {
+		return 'data:image/gif;base64,' + base64;
+	};
 
-      _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);
+	//---------------------------------------------------------------------
+	// returns qrcode function.
 
-      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.getTypeNumber = function() {
-      return _typeNumber;
-    };
-
-    _this.setColors = function(foreground, background) {
-      _foreground = simplifyColor(foreground);
-      _background = simplifyColor(background);
-
-      function simplifyColor(c) {
-        if (c.match(/^#[0-9A-Fa-f]{6}$/) && c[1] === c[2] && c[3] === c[4] && c[5] === c[6])
-          c = "#" + c[1] + c[3] + c[5];
-        return c;
-      }
-    };
-
-    _this.createTableTag = function(cellSize, margin) {
-
-      cellSize = cellSize || 2;
-      margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
-
-      var qrHtml = '';
-
-      qrHtml += '<table style="border: solid ' + margin + 'px ' + _background + ';';
-      qrHtml += ' border-collapse: collapse;';
-      qrHtml += ' padding: 0px;';
-      qrHtml += '">';
-
-      for (var r = 0; r < _this.getModuleCount(); r += 1) {
-
-        qrHtml += '<tr>';
-
-        for (var c = 0; c < _this.getModuleCount(); c += 1) {
-          qrHtml += '<td style="border: none;';
-          qrHtml += ' border-collapse: collapse;';
-          qrHtml += ' padding: 0px; margin: 0px;';
-          qrHtml += ' width: ' + cellSize + 'px;';
-          qrHtml += ' height: ' + cellSize + 'px;';
-          qrHtml += ' background-color: ' + (_this.isDark(r, c) ? _foreground : _background) + ';';
-          qrHtml += '"/>';
-        }
-
-        qrHtml += '</tr>';
-      }
-
-      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, c2, mc, r, mr, qrSvg='', rect;
-
-      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="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
-      qrSvg += '<path d="';
-
-      var d = '';
-      for (r = 0; r < _this.getModuleCount(); r++) {
-        mr = r * cellSize + margin;
-        for (c = 0; c < _this.getModuleCount(); c++) {
-          if (_this.isDark(r, c)) {
-            mc = c * cellSize + margin;
-            for (c2 = c + 1; c2 < _this.getModuleCount() && _this.isDark(r, c2); c2++);
-            var cx = c2 - c;
-            rect = 'h' + (cellSize * cx) + 'v' + cellSize +
-              'h-' + (cellSize * cx) + 'v-' + cellSize + 'z ';
-            d += 'M' + mc + ',' + mr + rect;
-            c = c2 - 1;
-          }
-        }
-      }
-
-      qrSvg += d.trim() + '" stroke="transparent" fill="' + _foreground + '"/>';
-      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, _foreground, _background, 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 src="' + _this.createDataURL(cellSize, margin) + '"';
-      img += ' width="' + size + '"';
-      img += ' height="' + size + '"';
-      if (alt)
-        img += ' alt="' + escapeXml(alt) + '"';
-      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, inverted) {
-      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 = {
-        '██': '█',
-        '█ ': '▀',
-        ' █': '▄',
-        '  ': '\xa0'
-      };
-
-      var blocksLastLineNoMargin = {
-        '██': '▀',
-        '█ ': '▀',
-        ' █': '\xa0',
-        '  ': '\xa0'
-      };
-
-      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 = inverted ? '█' : ' ';
-
-          if (min <= x && x < max && min <= y && y < max && _this.isDark(r1, Math.floor((x - min) / cellSize))) {
-            p = inverted ? ' ' : '█';
-          }
-
-          if (min <= x && x < max && min <= y+1 && y+1 < max && _this.isDark(r2, Math.floor((x - min) / cellSize))) {
-            p += inverted ? ' ' : '█';
-          }
-          else {
-            p += inverted ? '█' : ' ';
-          }
-
-          // 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(inverted ? '▀' : '\xa0');
-      }
-
-      return ascii.substring(0, ascii.length-1);
-    };
-
-    _this.createASCII = function(cellSize, margin, inverted) {
-      cellSize = cellSize || 1;
-
-      if (cellSize < 2) {
-        return _createHalfASCII(margin, inverted);
-      }
-
-      cellSize -= 1;
-      margin = (typeof margin == 'undefined')? cellSize * 2 : margin / (cellSize + 1)  * cellSize;
-
-      var size = _this.getModuleCount() * cellSize + margin * 2;
-      var min = margin;
-      var max = size - margin;
-
-      var y, x, r, p;
-
-      var white = '\xa0\xa0';
-      var black = '██';
-      if (inverted) {
-        var b = black;
-        black = white;
-        white = b;
-      }
-
-      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;
-        }
-
-        ascii += line + '\n';
-      }
-
-      return ascii.substring(0, ascii.length-1);
-    };
-
-    _this.renderTo2dContext = function(context, cellSize, margin) {
-      cellSize = cellSize || 2;
-      margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
-      var length = _this.getModuleCount();
-      if (margin > 0) {
-        context.fillStyle = _background;
-        context.fillRect(0, 0, length * cellSize + margin * 2, length * cellSize + margin * 2);
-      }
-      for (var row = 0; row < length; row++) {
-        for (var col = 0; col < length; col++) {
-          context.fillStyle = _this.isDark(row, col) ? _foreground : _background;
-          context.fillRect(margin + col * cellSize, margin + row * 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, foreground, background) {
-
-    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
-
-      // foreground
-      var fg = parseColor(foreground, "#000");
-      out.writeByte(fg[0]);
-      out.writeByte(fg[1]);
-      out.writeByte(fg[2]);
-
-      // background
-      var bg = parseColor(background, "#fff");
-      out.writeByte(bg[0]);
-      out.writeByte(bg[1]);
-      out.writeByte(bg[2]);
-
-      //---------------------------------
-      // 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(';');
-    };
-
-    function parseColor(c, fallback) {
-      c = c.toLowerCase();
-      if (c.match(/^#[0-9a-f]{3}$/))
-        return [parseInt(c[1] + c[1], 16), parseInt(c[2] + c[2], 16), parseInt(c[3] + c[3], 16)];
-      if (c.match(/^#[0-9a-f]{6}$/))
-        return [parseInt(c[1] + c[2], 16), parseInt(c[3] + c[4], 16), parseInt(c[5] + c[6], 16)];
-      return parseColor(fallback);
-    }
-
-    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, foreground, background, getPixel) {
-    var gif = gifImage(width, height, foreground, background);
-    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;
+	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 () {
+	qrcode.stringToBytesFuncs['UTF-8'] = function (s) {
+		// http://stackoverflow.com/questions/18729405/how-to-convert-utf8-string-to-byte-array
+		function toUTF8Array(str) {
+			let utf8 = [];
+			for (let i = 0; i < str.length; i++) {
+				let 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) {
-  if (typeof define === 'function' && define.amd) {
-      define([], factory);
-  } else if (typeof exports === 'object') {
-      module.exports = factory();
-  }
+	if (typeof define === 'function' && define.amd) {
+		define([], factory);
+	}
+	else if (typeof exports === 'object') {
+		module.exports = factory();
+	}
 }(function () {
-    return qrcode;
+	return qrcode;
 }));
diff --git a/js/sample.html b/js/sample.html
index 19515ad..90ec81e 100644
--- a/js/sample.html
+++ b/js/sample.html
@@ -1,90 +1,91 @@
 <!doctype html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <script type="text/javascript" src="qrcode.js"></script>
-    <!-- SJIS Support (optional) -->
-    <script type="text/javascript" src="qrcode_SJIS.js"></script>
-<!--
-    <script type="text/javascript" src="qrcode_SJIS.js"></script>
--->
-    <!-- Uncomment to encode string in qrcode as UTF8 (optional) -->
-<!--
-    <script type="text/javascript" src="qrcode_UTF8.js"></script>
--->
-    <script type="text/javascript" src="sample.js"></script>
-    <title>QR Code Generator for JavaScript</title>
-    <link rel="stylesheet" href="sample.css">
-  </head>
-  <body onload="body_loadHander()">
-    <h1>QR Code Generator for JavaScript</h1>
-    <form name="qrForm">
-      <p>
-        <textarea name="msg">Type your message here.</textarea><br>
-        <span id="length"></span>
-      </p>
-      <p>
-        Cell size:
-        <input name="cellsize" type="number" min="1" max="999" value="4" size="4">
-        &nbsp;
-        Padding:
-        <input name="padding" type="number" min="0" max="9" value="1" size="3">
-        &nbsp;
-        Error correction level:
-        <select name="e">
-          <option value="L" selected>Low (7%)</option>
-          <option value="M">Medium (15%)</option>
-          <option value="Q">Quartile (25%)</option>
-          <option value="H">High (30%)</option>
-        </select>
-      </p>
-      <p>
-        Image type:
-        <select name="format">
-          <option value="svg" selected>SVG</option>
-          <option value="png">PNG</option>
-          <option value="webp">WEBP</option>
-          <option value="jpeg">JPEG</option>
-          <option value="gif">GIF</option>
-          <option value="gif-direct">GIF (w/o canvas)</option>
-          <option value="ascii">ASCII</option>
-          <option value="ascii-inv">ASCII inverted</option>
-          <option value="table">Table</option>
-        </select>
-        &nbsp;
-        Foreground:
-        <input name="foreground" type="color" value="#000000">
-        &nbsp;
-        Background:
-        <input name="background" type="color" value="#ffffff">
-      </p>
-      <p>
-        Content mode:
-        <select name="m">
-          <option value="" selected>Auto</option>
-          <option value="Numeric">Numeric</option>
-          <option value="Alphanumeric">Alphanumeric</option>
-          <option value="Byte">Byte</option>
-          <option value="Kanji">Kanji</option>
-        </select>
-        &nbsp;
-        Multibyte text:
-        <select name="mb">
-          <option value="default">None</option>
-          <option value="SJIS">SJIS</option>
-          <option value="UTF-8" selected>UTF-8</option>
-        </select>
-        &nbsp;
-        Size type:
-        <select name="t"></select>
-      </p>
-      <div id="qr"></div>
-      <p>
-        <span id="qr-info"></span>
-      </p>
-      <p>
-        <button type="button" id="download">Download</button>
-      </p>
-    </form>
-  </body>
+<head>
+	<meta charset="utf-8">
+	<script type="text/javascript" src="qrcode.js"></script>
+	<!-- SJIS Support (optional) -->
+	<script type="text/javascript" src="qrcode_SJIS.js"></script>
+	<!--
+	<script type="text/javascript" src="qrcode_SJIS.js"></script>
+	-->
+	<!-- Uncomment to encode string in qrcode as UTF8 (optional) -->
+	<!--
+	<script type="text/javascript" src="qrcode_UTF8.js"></script>
+	-->
+	<script type="text/javascript" src="sample.js"></script>
+	<title>QR Code Generator for JavaScript</title>
+	<link rel="stylesheet" href="sample.css">
+</head>
+<body onload="body_loadHander()">
+	<h1>QR Code Generator for JavaScript</h1>
+
+	<form name="qrForm">
+	<p>
+		<textarea name="msg">Type your message here.</textarea><br>
+		<span id="length"></span>
+	</p>
+	<p>
+		Cell size:
+		<input name="cellsize" type="number" min="1" max="999" value="4" size="4">
+		&nbsp;
+		Padding:
+		<input name="padding" type="number" min="0" max="9" value="1" size="3">
+		&nbsp;
+		Error correction level:
+		<select name="e">
+			<option value="L" selected>Low (7%)</option>
+			<option value="M">Medium (15%)</option>
+			<option value="Q">Quartile (25%)</option>
+			<option value="H">High (30%)</option>
+		</select>
+	</p>
+	<p>
+		Image type:
+		<select name="format">
+			<option value="svg" selected>SVG</option>
+			<option value="png">PNG</option>
+			<option value="webp">WEBP</option>
+			<option value="jpeg">JPEG</option>
+			<option value="gif">GIF</option>
+			<option value="gif-direct">GIF (w/o canvas)</option>
+			<option value="ascii">ASCII</option>
+			<option value="ascii-inv">ASCII inverted</option>
+			<option value="table">Table</option>
+		</select>
+		&nbsp;
+		Foreground:
+		<input name="foreground" type="color" value="#000000">
+		&nbsp;
+		Background:
+		<input name="background" type="color" value="#ffffff">
+	</p>
+	<p>
+		Content mode:
+		<select name="m">
+			<option value="" selected>Auto</option>
+			<option value="Numeric">Numeric</option>
+			<option value="Alphanumeric">Alphanumeric</option>
+			<option value="Byte">Byte</option>
+			<option value="Kanji">Kanji</option>
+		</select>
+		&nbsp;
+		Multibyte text:
+		<select name="mb">
+			<option value="default">None</option>
+			<option value="SJIS">SJIS</option>
+			<option value="UTF-8" selected>UTF-8</option>
+		</select>
+		&nbsp;
+		Size type:
+		<select name="t"></select>
+	</p>
+	<div id="qr"></div>
+	<p>
+		<span id="qr-info"></span>
+	</p>
+	<p>
+		<button type="button" id="download">Download</button>
+	</p>
+	</form>
+</body>
 </html>
diff --git a/js/sample.js b/js/sample.js
index 9a46273..111f5b4 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -1,164 +1,162 @@
 var downloadFileName, downloadType, downloadData;
 
-var body_loadHander = function() {
-
-  var crtOpt = function(value, label) {
-    var opt = document.createElement('option');
-    opt.appendChild(document.createTextNode(label) );
-    opt.value = value;
-    return opt;
-  };
-
-  var t = document.forms['qrForm'].elements['t'];
-  t.appendChild(crtOpt('' + 0, 'Auto') );
-  for (var i = 1; i <= 40; i += 1) {
-    t.appendChild(crtOpt('' + i, '' + i) );
-  }
-  t.value = '0';
-
-  var form = document.forms['qrForm'];
-  form.elements['msg'].addEventListener("input", update_qrcode);
-  form.elements['t'].addEventListener("change", update_qrcode);
-  form.elements['cellsize'].addEventListener("input", update_qrcode);
-  form.elements['padding'].addEventListener("input", update_qrcode);
-  form.elements['e'].addEventListener("change", update_qrcode);
-  form.elements['m'].addEventListener("change", update_qrcode);
-  form.elements['mb'].addEventListener("change", update_qrcode);
-  form.elements['format'].addEventListener("change", update_qrcode);
-  form.elements['foreground'].addEventListener("change", update_qrcode);
-  form.elements['background'].addEventListener("change", update_qrcode);
-  update_qrcode();
-
-  document.getElementById("download").addEventListener("click", function () {
-    if (downloadData)
-      download(downloadFileName, downloadType, downloadData);
-  });
+var body_loadHander = function () {
+	var crtOpt = function (value, label) {
+		let opt = document.createElement('option');
+		opt.appendChild(document.createTextNode(label));
+		opt.value = value;
+		return opt;
+	};
+
+	let t = document.forms['qrForm'].elements['t'];
+	t.appendChild(crtOpt('' + 0, 'Auto'));
+	for (let i = 1; i <= 40; i += 1) {
+		t.appendChild(crtOpt('' + i, '' + i));
+	}
+	t.value = '0';
+
+	let form = document.forms['qrForm'];
+	form.elements['msg'].addEventListener("input", update_qrcode);
+	form.elements['t'].addEventListener("change", update_qrcode);
+	form.elements['cellsize'].addEventListener("input", update_qrcode);
+	form.elements['padding'].addEventListener("input", update_qrcode);
+	form.elements['e'].addEventListener("change", update_qrcode);
+	form.elements['m'].addEventListener("change", update_qrcode);
+	form.elements['mb'].addEventListener("change", update_qrcode);
+	form.elements['format'].addEventListener("change", update_qrcode);
+	form.elements['foreground'].addEventListener("change", update_qrcode);
+	form.elements['background'].addEventListener("change", update_qrcode);
+	update_qrcode();
+
+	document.getElementById("download").addEventListener("click", function () {
+		if (downloadData)
+			download(downloadFileName, downloadType, downloadData);
+	});
 };
 
-var draw_qrcode = function(text, typeNumber, errorCorrectionLevel) {
-  document.write(create_qrcode(text, typeNumber, errorCorrectionLevel) );
+var draw_qrcode = function (text, typeNumber, errorCorrectionLevel) {
+	document.write(create_qrcode(text, typeNumber, errorCorrectionLevel));
 };
 
-var create_qrcode = function(text, typeNumber, cellsize, padding, errorCorrectionLevel, mode, mb, format, fg, bg) {
-
-  if (!mode) {
-    if (text.match(/^[0-9]+$/))
-      mode = "Numeric";
-    else if (text.match(/^[0-9A-Z $%*+/.:-]+$/))
-      mode = "Alphanumeric";
-    else
-      mode = "Byte";
-  }
-
-  var info = document.getElementById("qr-info");
-  downloadData = undefined;
-
-  var showLength = function (len) {
-    if (len < 1024)
-      len += " B";
-    else if (len < 10240)
-      len = Math.round(len * 100 / 1024) / 100 + " KiB";
-    else
-      len = Math.round(len * 10 / 1024) / 10 + " KiB";
-    info.innerHTML +=  ", file size: <b>" + len + "</b>";
-  };
-
-  try {
-    qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
-
-    var qr = qrcode(typeNumber || 0, errorCorrectionLevel || 'M');
-    qr.addData(text, mode);
-    qr.make();
-    qr.setColors(fg, bg);
-
-    var size = qr.getModuleCount() * cellsize + padding * 2;
-    info.innerHTML = "Size type: <b>" + qr.getTypeNumber() + "</b>, " +
-      "code columns: <b>" + qr.getModuleCount() + "</b>, " +
-      "image size: <b>" + size + "x" + size + " px</b>";
-
-    switch (format) {
-      case "svg":
-        downloadFileName = "qr.svg";
-        downloadType = "image/svg";
-        downloadData = qr.createSvgTag(cellsize, padding);
-        showLength(downloadData.length);
-        return downloadData;
-      case "gif":
-      case "png":
-      case "webp":
-      case "jpeg":
-        var canvas = document.createElement("canvas");
-        canvas.width = canvas.height = qr.getModuleCount() * cellsize + padding * 2;
-        var context = canvas.getContext("2d");
-        qr.renderTo2dContext(context, cellsize, padding);
-        downloadFileName = "qr." + format;
-        downloadType = "";   // raw download data URL
-        downloadData = canvas.toDataURL("image/" + format);
-        showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
-        var warning = "";
-        var m = downloadData.match(/^data:image\/([a-z0-9]+)/);
-        if (m && m[1] !== format)
-          warning = "<br><br><strong>Attention:</strong> This browser cannot generate " +
-            format.toUpperCase() + " images and made a " + m[1].toUpperCase() + " instead.";
-        return '<img src="' + downloadData + '" width="' + canvas.width + '" height="' + canvas.height + '">' + warning;
-      case "gif-direct":
-        downloadFileName = "qr.gif";
-        downloadType = "";   // raw download data URL
-        downloadData = qr.createDataURL(cellsize, padding);
-        showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
-        return qr.createImgTag(cellsize, padding);
-      case "ascii":
-        downloadFileName = "qr.txt";
-        downloadType = "text/plain";
-        downloadData = qr.createASCII(cellsize, padding);
-        showLength(downloadData.length);
-        return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
-      case "ascii-inv":
-        downloadFileName = "qr.txt";
-        downloadType = "text/plain";
-        downloadData = qr.createASCII(cellsize, padding, true);
-        showLength(downloadData.length);
-        return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
-      case "table":
-        downloadFileName = "qr.html";
-        downloadType = "text/html";
-        downloadData = qr.createTableTag(cellsize, padding);
-        showLength(downloadData.length);
-        return downloadData;
-    }
-  }
-  catch (error) {
-    info.innerHTML = "Error: " + error;
-    return "";
-  }
+var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrectionLevel, mode, mb, format, fg, bg) {
+	if (!mode) {
+		if (text.match(/^[0-9]+$/))
+			mode = "Numeric";
+		else if (text.match(/^[0-9A-Z $%*+/.:-]+$/))
+			mode = "Alphanumeric";
+		else
+			mode = "Byte";
+	}
+
+	let info = document.getElementById("qr-info");
+	downloadData = undefined;
+
+	var showLength = function (len) {
+		if (len < 1024)
+			len += " B";
+		else if (len < 10240)
+			len = Math.round(len * 100 / 1024) / 100 + " KiB";
+		else
+			len = Math.round(len * 10 / 1024) / 10 + " KiB";
+		info.innerHTML += ", file size: <b>" + len + "</b>";
+	};
+
+	try {
+		qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
+
+		let qr = qrcode(typeNumber || 0, errorCorrectionLevel || 'M');
+		qr.addData(text, mode);
+		qr.make();
+		qr.setColors(fg, bg);
+
+		let size = qr.getModuleCount() * cellsize + padding * 2;
+		info.innerHTML = "Size type: <b>" + qr.getTypeNumber() + "</b>, " +
+			"code columns: <b>" + qr.getModuleCount() + "</b>, " +
+			"image size: <b>" + size + "x" + size + " px</b>";
+
+		switch (format) {
+			case "svg":
+				downloadFileName = "qr.svg";
+				downloadType = "image/svg";
+				downloadData = qr.createSvgTag(cellsize, padding);
+				showLength(downloadData.length);
+				return downloadData;
+			case "gif":
+			case "png":
+			case "webp":
+			case "jpeg":
+				var canvas = document.createElement("canvas");
+				canvas.width = canvas.height = qr.getModuleCount() * cellsize + padding * 2;
+				var context = canvas.getContext("2d");
+				qr.renderTo2dContext(context, cellsize, padding);
+				downloadFileName = "qr." + format;
+				downloadType = "";   // raw download data URL
+				downloadData = canvas.toDataURL("image/" + format);
+				showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
+				var warning = "";
+				var m = downloadData.match(/^data:image\/([a-z0-9]+)/);
+				if (m && m[1] !== format)
+					warning = "<br><br><strong>Attention:</strong> This browser cannot generate " +
+						format.toUpperCase() + " images and made a " + m[1].toUpperCase() + " instead.";
+				return '<img src="' + downloadData + '" width="' + canvas.width + '" height="' + canvas.height + '">' + warning;
+			case "gif-direct":
+				downloadFileName = "qr.gif";
+				downloadType = "";   // raw download data URL
+				downloadData = qr.createDataURL(cellsize, padding);
+				showLength(downloadData.replace(/^data:image\/[a-z]+;base64,/, "").length * 3 / 4);
+				return qr.createImgTag(cellsize, padding);
+			case "ascii":
+				downloadFileName = "qr.txt";
+				downloadType = "text/plain";
+				downloadData = qr.createASCII(cellsize, padding);
+				showLength(downloadData.length);
+				return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+			case "ascii-inv":
+				downloadFileName = "qr.txt";
+				downloadType = "text/plain";
+				downloadData = qr.createASCII(cellsize, padding, true);
+				showLength(downloadData.length);
+				return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+			case "table":
+				downloadFileName = "qr.html";
+				downloadType = "text/html";
+				downloadData = qr.createTableTag(cellsize, padding);
+				showLength(downloadData.length);
+				return downloadData;
+		}
+	}
+	catch (error) {
+		info.innerHTML = "Error: " + error;
+		return "";
+	}
 };
 
-var update_qrcode = function() {
-  var form = document.forms['qrForm'];
-  var text = form.elements['msg'].value.replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');
-  var t = form.elements['t'].value;
-  var cellsize = +form.elements['cellsize'].value;
-  var padding = +form.elements['padding'].value * cellsize;
-  var e = form.elements['e'].value;
-  var m = form.elements['m'].value;
-  var mb = form.elements['mb'].value;
-  var format = form.elements['format'].value;
-  var fg = form.elements['foreground'].value;
-  var bg = form.elements['background'].value;
-  document.getElementById("length").innerHTML = "(" + text.length + " characters)";
-  document.getElementById('qr').innerHTML = create_qrcode(text, t, cellsize, padding, e, m, mb, format, fg, bg);
+var update_qrcode = function () {
+	let form = document.forms['qrForm'];
+	let text = form.elements['msg'].value.replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');
+	let t = form.elements['t'].value;
+	let cellsize = +form.elements['cellsize'].value;
+	let padding = +form.elements['padding'].value * cellsize;
+	let e = form.elements['e'].value;
+	let m = form.elements['m'].value;
+	let mb = form.elements['mb'].value;
+	let format = form.elements['format'].value;
+	let fg = form.elements['foreground'].value;
+	let bg = form.elements['background'].value;
+	document.getElementById("length").innerHTML = "(" + text.length + " characters)";
+	document.getElementById('qr').innerHTML = create_qrcode(text, t, cellsize, padding, e, m, mb, format, fg, bg);
 };
 
 // Source: https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server
 function download(filename, mimeType, text) {
-  var element = document.createElement("a");
-  if (downloadType)
-    element.setAttribute("href", "data:" + mimeType + ";charset=utf-8," + encodeURIComponent(text));
-  else
-    element.setAttribute("href", text);
-  element.setAttribute("download", filename);
-  element.style.display = "none";
-  document.body.appendChild(element);
-  element.click();
-  document.body.removeChild(element);
+	let element = document.createElement("a");
+	if (downloadType)
+		element.setAttribute("href", "data:" + mimeType + ";charset=utf-8," + encodeURIComponent(text));
+	else
+		element.setAttribute("href", text);
+	element.setAttribute("download", filename);
+	element.style.display = "none";
+	document.body.appendChild(element);
+	element.click();
+	document.body.removeChild(element);
 }

From 5bb2d93e10beacb919a1fff242012360e92256ca Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Thu, 3 Jun 2021 11:42:37 +0200
Subject: [PATCH 7/8] Optimised SVG shape by reducing points (another 60% size
 reduction)

* The number of points in the SVG is minimised by connecting all squares in the most efficient way
* Added minified source file with source map
* New sample form options: trim text, select mask pattern
* Mask patterns can be selected and evaluated for file size and visual "beauty"
* Sample form is now fixed, list selections survive page reload in the browser
---
 README.md               |   7 ++
 js/README.md            |  24 +++++
 js/miniwebcompiler.json |   8 ++
 js/qrcode.js            | 222 +++++++++++++++++++++++++++++++++-------
 js/qrcode.min.js        |   2 +
 js/qrcode.min.js.map    |   1 +
 js/sample.html          |  87 +++++++++++++---
 js/sample.js            |  50 +++++----
 8 files changed, 330 insertions(+), 71 deletions(-)
 create mode 100644 js/miniwebcompiler.json
 create mode 100644 js/qrcode.min.js
 create mode 100644 js/qrcode.min.js.map

diff --git a/README.md b/README.md
index 407cd69..73fa8e3 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,10 @@ All the implementations are based on JIS X 0510:1999.
 
 The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED
 <br/>http://www.denso-wave.com/qrcode/faqpatent-e.html
+
+----
+
+This repository is a fork of the original with all programming languages.
+It contains **only improvements for the JavaScript implementation**.
+Please select the "improvements" branch to see the changes.
+Other files have not been altered or regarded in any way.
diff --git a/js/README.md b/js/README.md
index f68c416..6b9cdd1 100644
--- a/js/README.md
+++ b/js/README.md
@@ -59,6 +59,10 @@ Make a QR Code.
 The number of modules(cells) for each orientation.
 _[Note] call make() before this function._
 
+#### getDarkCount() => <code>number</code>
+The total number of modules(cells) that are dark in the final QR code.
+_[Note] call make() before this function._
+
 #### isDark(row, col) => <code>boolean</code>
 The module at row and col is dark or not.
 _[Note] call make() before this function._
@@ -68,6 +72,26 @@ _[Note] call make() before this function._
 | row   | <code>number</code> | 0 ~ moduleCount - 1 |
 | col   | <code>number</code> | 0 ~ moduleCount - 1 |
 
+#### getTypeNumber() => <code>number</code>
+Gets the code size type of the final QR code.
+_[Note] call make() before this function._
+
+#### getMaskPattern() => <code>number</code>
+Gets the index of the mask pattern (0 to 7) that was used in the final QR code.
+_[Note] call make() before this function._
+
+#### getBestMaskPattern() => <code>number</code>
+Gets the index of the mask pattern (0 to 7) that would be chosen for the QR code, based on its minimal penalty score.
+_[Note] call make() before this function._
+
+#### getMaskPatternPenaltyScores() => <code>number[]</code>
+Gets the calculated penalty score for each mask pattern. Lower values make better QR codes.
+_[Note] call make() before this function._
+
+#### setMaskPattern(index) => <code>void</code>
+Sets the index of the mask pattern (0 to 7) to use in the final QR code, regardless of which the best pattern would be.
+Default to null, which selects the best pattern automatically.
+
 #### setColors(foreground, background) => <code>void</code>
 Sets the foreground and background colors for the output formats. Default to black and white, respectively.
 _[Note] This has no effect on the ASCII output._
diff --git a/js/miniwebcompiler.json b/js/miniwebcompiler.json
new file mode 100644
index 0000000..5312337
--- /dev/null
+++ b/js/miniwebcompiler.json
@@ -0,0 +1,8 @@
+{
+  "projectName": "qrcode-generator",
+  "files": [
+    {
+      "name": "qrcode.js"
+    }
+  ]
+}
diff --git a/js/qrcode.js b/js/qrcode.js
index 3fe276a..5755d4d 100644
--- a/js/qrcode.js
+++ b/js/qrcode.js
@@ -3,6 +3,7 @@
 // QR Code Generator for JavaScript
 //
 // Copyright (c) 2009 Kazuhiko Arase
+// Improved 2020-2021 by Yves Goergen, ygoe.de
 //
 // URL: http://www.d-project.com/
 //
@@ -38,6 +39,10 @@ var qrcode = function () {
 		let _dataList = [];
 		let _foreground = "black";
 		let _background = "white";
+		let _maskPatternOverride = null;
+		let _maskPattern;
+		let _bestMaskPattern;
+		let _maskPatternPenaltyScores = [];
 		let _this = {};
 
 		var makeImpl = function (test, maskPattern) {
@@ -90,19 +95,21 @@ var qrcode = function () {
 		};
 
 		var getBestMaskPattern = function () {
-			let minLostPoint = 0;
-			let pattern = 0;
+			let minPenaltyScore = 0;
+			let bestPattern = 0;
+			_maskPatternPenaltyScores = [];
 
 			for (let i = 0; i < 8; i++) {
 				makeImpl(true, i);
 
-				let lostPoint = QRUtil.getLostPoint(_this);
-				if (i === 0 || minLostPoint > lostPoint) {
-					minLostPoint = lostPoint;
-					pattern = i;
+				let penaltyScore = QRUtil.getPenaltyScore(_this);
+				_maskPatternPenaltyScores.push(penaltyScore);
+				if (i === 0 || penaltyScore < minPenaltyScore) {
+					minPenaltyScore = penaltyScore;
+					bestPattern = i;
 				}
 			}
-			return pattern;
+			return bestPattern;
 		};
 
 		var setupTimingPattern = function () {
@@ -276,7 +283,6 @@ var qrcode = function () {
 
 			let data = new Array(totalCodeCount);
 			let index = 0;
-
 			for (let i = 0; i < maxDcCount; i++) {
 				for (let r = 0; r < rsBlocks.length; r++) {
 					if (i < dcdata[r].length) {
@@ -346,7 +352,6 @@ var qrcode = function () {
 			mode = mode || 'Byte';
 
 			let newData = null;
-
 			switch (mode) {
 				case 'Numeric':
 					newData = qrNumber(data);
@@ -379,6 +384,17 @@ var qrcode = function () {
 			return _moduleCount;
 		};
 
+		_this.getDarkCount = function () {
+			let count = 0;
+			for (let row = 0; row < _moduleCount; row++) {
+				for (let col = 0; col < _moduleCount; col++) {
+					if (_modules[row][col])
+						count++;
+				}
+			}
+			return count;
+		};
+
 		_this.make = function () {
 			if (_typeNumber < 1) {
 				let typeNumber = 1;
@@ -407,13 +423,33 @@ var qrcode = function () {
 				_typeNumber = typeNumber;
 			}
 
-			makeImpl(false, getBestMaskPattern());
+			_maskPattern = getBestMaskPattern();
+			_bestMaskPattern = _maskPattern;
+			if (_maskPatternOverride !== null)
+				_maskPattern = _maskPatternOverride;
+			makeImpl(false, _maskPattern);
 		};
 
 		_this.getTypeNumber = function () {
 			return _typeNumber;
 		};
 
+		_this.getMaskPattern = function () {
+			return _maskPattern;
+		};
+
+		_this.getBestMaskPattern = function () {
+			return _bestMaskPattern;
+		};
+
+		_this.getMaskPatternPenaltyScores = function () {
+			return _maskPatternPenaltyScores;
+		};
+
+		_this.setMaskPattern = function (maskPattern) {
+			_maskPatternOverride = maskPattern;
+		};
+
 		_this.setColors = function (foreground, background) {
 			_foreground = simplifyColor(foreground);
 			_background = simplifyColor(background);
@@ -426,7 +462,6 @@ var qrcode = function () {
 		};
 
 		_this.createTableTag = function (cellSize, margin) {
-
 			cellSize = cellSize || 2;
 			margin = (typeof margin === 'undefined') ? cellSize * 4 : margin;
 
@@ -479,8 +514,7 @@ var qrcode = function () {
 			title.id = (title.text) ? title.id || 'qrcode-title' : null;
 
 			let size = _this.getModuleCount() * cellSize + margin * 2;
-			let c, c2, mc, r, mr, qrSvg = '', rect;
-
+			let qrSvg = '';
 			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 + '"';
@@ -493,25 +527,141 @@ var qrcode = function () {
 			qrSvg += (alt.text) ? '<description id="' + escapeXml(alt.id) + '">' +
 				escapeXml(alt.text) + '</description>' : '';
 			qrSvg += '<rect width="' + size + '" height="' + size + '" fill="' + _background + '" cx="0" cy="0"/>';
-			qrSvg += '<path d="';
-
-			let d = '';
-			for (r = 0; r < _this.getModuleCount(); r++) {
-				mr = r * cellSize + margin;
-				for (c = 0; c < _this.getModuleCount(); c++) {
-					if (_this.isDark(r, c)) {
-						mc = c * cellSize + margin;
-						for (c2 = c + 1; c2 < _this.getModuleCount() && _this.isDark(r, c2); c2++);
-						let cx = c2 - c;
-						rect = 'h' + (cellSize * cx) + 'v' + cellSize +
-							'h-' + (cellSize * cx) + 'v-' + cellSize + 'z ';
-						d += 'M' + mc + ',' + mr + rect;
-						c = c2 - 1;
+
+			const moduleCount = _this.getModuleCount();
+			const pointEquals = function (a, b) {
+				return a[0] === b[0] && a[1] === b[1];
+			};
+
+			// Mark all four edges of each square in clockwise drawing direction
+			const edges = [];
+			for (let row = 0; row < moduleCount; row++) {
+				for (let col = 0; col < moduleCount; col++) {
+					if (_this.isDark(row, col)) {
+						const x0 = col * cellSize + margin;
+						const y0 = row * cellSize + margin;
+						const x1 = (col + 1) * cellSize + margin;
+						const y1 = (row + 1) * cellSize + margin;
+						edges.push([[x0, y0], [x1, y0]]);   // top edge (to right)
+						edges.push([[x1, y0], [x1, y1]]);   // right edge (down)
+						edges.push([[x1, y1], [x0, y1]]);   // bottom edge (to left)
+						edges.push([[x0, y1], [x0, y0]]);   // left edge (up)
+					}
+				}
+			}
+
+			// Edges that exist in both directions cancel each other (connecting the rectangles)
+			for (let i = edges.length - 1; i >= 0; i--) {
+				for (let j = i - 1; j >= 0; j--) {
+					if (pointEquals(edges[i][0], edges[j][1]) &&
+						pointEquals(edges[i][1], edges[j][0])) {
+						// First remove index i, it's greater than j
+						edges.splice(i, 1);
+						edges.splice(j, 1);
+						i--;
+						break;
 					}
 				}
 			}
 
-			qrSvg += d.trim() + '" stroke="transparent" fill="' + _foreground + '"/>';
+			let polygons = [];
+			while (edges.length > 0) {
+				// Pick a random edge and follow its connected edges to form a path (remove used edges)
+				// If there are multiple connected edges, pick the first
+				// Stop when the starting point of this path is reached
+				let polygon = [];
+				polygons.push(polygon);
+				let edge = edges.splice(0, 1)[0];
+				polygon.push(edge[0]);
+				polygon.push(edge[1]);
+				do {
+					let foundEdge = false;
+					for (let i = 0; i < edges.length; i++) {
+						if (pointEquals(edges[i][0], edge[1])) {
+							// Found an edge that starts at the last edge's end
+							foundEdge = true;
+							edge = edges.splice(i, 1)[0];
+							let p1 = polygon[polygon.length - 2];   // polygon's second-last point
+							let p2 = polygon[polygon.length - 1];   // polygon's current end
+							let p3 = edge[1];   // new point
+							// Extend polygon end if it's continuing in the same direction
+							if (p1[0] === p2[0] &&   // polygon ends vertical
+								p2[0] === p3[0]) {   // new point is vertical, too
+								polygon[polygon.length - 1][1] = p3[1];
+							}
+							else if (p1[1] === p2[1] &&   // polygon ends horizontal
+								p2[1] === p3[1]) {   // new point is horizontal, too
+								polygon[polygon.length - 1][0] = p3[0];
+							}
+							else {
+								polygon.push(p3);   // new direction
+							}
+							break;
+						}
+					}
+					if (!foundEdge)
+						throw new Error("no next edge found at", edge[1]);
+				}
+				while (!pointEquals(polygon[polygon.length - 1], polygon[0]));
+				
+				// Move polygon's start and end point into a corner
+				if (polygon[0][0] === polygon[1][0] &&
+					polygon[polygon.length - 2][0] === polygon[polygon.length - 1][0]) {
+					// start/end is along a vertical line
+					polygon.length--;
+					polygon[0][1] = polygon[polygon.length - 1][1];
+				}
+				else if (polygon[0][1] === polygon[1][1] &&
+					polygon[polygon.length - 2][1] === polygon[polygon.length - 1][1]) {
+					// start/end is along a horizontal line
+					polygon.length--;
+					polygon[0][0] = polygon[polygon.length - 1][0];
+				}
+			}
+			// Repeat until there are no more unused edges
+
+			// If two paths touch in at least one point, pick such a point and include one path in the other's sequence of points
+			for (let i = 0; i < polygons.length; i++) {
+				const polygon = polygons[i];
+				for (let j = 0; j < polygon.length; j++) {
+					const point = polygon[j];
+					for (let k = i + 1; k < polygons.length; k++) {
+						const polygon2 = polygons[k];
+						for (let l = 0; l < polygon2.length - 1; l++) {   // exclude end point (same as start)
+							const point2 = polygon2[l];
+							if (pointEquals(point, point2)) {
+								// Embed polygon2 into polygon
+								if (l > 0) {
+									// Touching point is not other polygon's start/end
+									polygon.splice.apply(polygon, [j + 1, 0].concat(
+										polygon2.slice(1, l + 1)));
+								}
+								polygon.splice.apply(polygon, [j + 1, 0].concat(
+									polygon2.slice(l + 1)));
+								polygons.splice(k, 1);
+								k--;
+								break;
+							}
+						}
+					}
+				}
+			}
+
+			// Generate SVG path data
+			let d = "";
+			for (let i = 0; i < polygons.length; i++) {
+				const polygon = polygons[i];
+				d += "M" + polygon[0][0] + "," + polygon[0][1];
+				for (let j = 1; j < polygon.length; j++) {
+					if (polygon[j][0] === polygon[j - 1][0])
+						d += "v" + (polygon[j][1] - polygon[j - 1][1]);
+					else
+						d += "h" + (polygon[j][0] - polygon[j - 1][0]);
+				}
+				d += "z";
+			}
+
+			qrSvg += '<path d="' + d + '" stroke="none" fill="' + _foreground + '"/>';
 			qrSvg += '</svg>';
 
 			return qrSvg;
@@ -955,9 +1105,9 @@ var qrcode = function () {
 			}
 		};
 
-		_this.getLostPoint = function (qrcode) {
+		_this.getPenaltyScore = function (qrcode) {
 			let moduleCount = qrcode.getModuleCount();
-			let lostPoint = 0;
+			let penaltyScore = 0;
 
 			// LEVEL1
 
@@ -982,7 +1132,7 @@ var qrcode = function () {
 					}
 
 					if (sameCount > 5) {
-						lostPoint += (3 + sameCount - 5);
+						penaltyScore += (3 + sameCount - 5);
 					}
 				}
 			};
@@ -997,7 +1147,7 @@ var qrcode = function () {
 					if (qrcode.isDark(row, col + 1)) count++;
 					if (qrcode.isDark(row + 1, col + 1)) count++;
 					if (count === 0 || count === 4) {
-						lostPoint += 3;
+						penaltyScore += 3;
 					}
 				}
 			}
@@ -1013,7 +1163,7 @@ var qrcode = function () {
 						qrcode.isDark(row, col + 4) &&
 						!qrcode.isDark(row, col + 5) &&
 						qrcode.isDark(row, col + 6)) {
-						lostPoint += 40;
+						penaltyScore += 40;
 					}
 				}
 			}
@@ -1027,7 +1177,7 @@ var qrcode = function () {
 						qrcode.isDark(row + 4, col) &&
 						!qrcode.isDark(row + 5, col) &&
 						qrcode.isDark(row + 6, col)) {
-						lostPoint += 40;
+						penaltyScore += 40;
 					}
 				}
 			}
@@ -1045,8 +1195,8 @@ var qrcode = function () {
 			}
 
 			let ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
-			lostPoint += ratio * 10;
-			return lostPoint;
+			penaltyScore += ratio * 10;
+			return penaltyScore;
 		};
 
 		return _this;
diff --git a/js/qrcode.min.js b/js/qrcode.min.js
new file mode 100644
index 0000000..38dcf90
--- /dev/null
+++ b/js/qrcode.min.js
@@ -0,0 +1,2 @@
+var qrcode=function(){var t=function(t,e){let r,n,o=t,i=l[e],u=null,f=0,a=null,c=[],g="black",h="white",s=null,w=[],m={};var b=function(t,e){u=function(t){let e=new Array(t);for(let r=0;r<t;r++){e[r]=new Array(t);for(let n=0;n<t;n++)e[r][n]=null}return e}(f=4*o+17),L(0,0),L(f-7,0),L(0,f-7),S(),v(),I(t,e),o>=7&&D(t),null===a&&(a=P(o,i,c)),T(a,e)},L=function(t,e){for(let r=-1;r<=7;r++)if(!(t+r<=-1||t+r>=f))for(let n=-1;n<=7;n++)e+n<=-1||e+n>=f||(u[t+r][e+n]=0<=r&&r<=6&&(0===n||6===n)||0<=n&&n<=6&&(0===r||6===r)||2<=r&&r<=4&&2<=n&&n<=4)},v=function(){for(let t=8;t<f-8;t++)null===u[t][6]&&(u[t][6]=t%2==0);for(let t=8;t<f-8;t++)null===u[6][t]&&(u[6][t]=t%2==0)},S=function(){let t=d.getPatternPosition(o);for(let e=0;e<t.length;e++)for(let r=0;r<t.length;r++){let n=t[e],o=t[r];if(null===u[n][o])for(let t=-2;t<=2;t++)for(let e=-2;e<=2;e++)u[n+t][o+e]=-2===t||2===t||-2===e||2===e||0===t&&0===e}},D=function(t){let e=d.getBCHTypeNumber(o);for(let r=0;r<18;r++){let n=!t&&1==(e>>r&1);u[Math.floor(r/3)][r%3+f-8-3]=n}for(let r=0;r<18;r++){let n=!t&&1==(e>>r&1);u[r%3+f-8-3][Math.floor(r/3)]=n}},I=function(t,e){let r=i<<3|e,n=d.getBCHTypeInfo(r);for(let e=0;e<15;e++){let r=!t&&1==(n>>e&1);e<6?u[e][8]=r:e<8?u[e+1][8]=r:u[f-15+e][8]=r}for(let e=0;e<15;e++){let r=!t&&1==(n>>e&1);e<8?u[8][f-e-1]=r:e<9?u[8][15-e-1+1]=r:u[8][15-e-1]=r}u[f-8][8]=!t},T=function(t,e){let r=-1,n=f-1,o=7,l=0,i=d.getMaskFunction(e);for(let e=f-1;e>0;e-=2)for(6===e&&(e-=1);;){for(let r=0;r<2;r++)if(null===u[n][e-r]){let f=!1;l<t.length&&(f=1==(t[l]>>>o&1)),i(n,e-r)&&(f=!f),u[n][e-r]=f,-1===(o-=1)&&(l++,o=7)}if((n+=r)<0||n>=f){n-=r,r=-r;break}}},P=function(t,e,r){let n=y.getRSBlocks(t,e),o=B();for(let e=0;e<r.length;e++){let n=r[e];o.put(n.getMode(),4),o.put(n.getLength(),d.getLengthInBits(n.getMode(),t)),n.write(o)}let l=0;for(let t=0;t<n.length;t++)l+=n[t].dataCount;if(o.getLengthInBits()>8*l)throw"code length overflow. 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diff --git a/js/qrcode.min.js.map b/js/qrcode.min.js.map
new file mode 100644
index 0000000..26a9252
--- /dev/null
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\ No newline at end of file
diff --git a/js/sample.html b/js/sample.html
index 90ec81e..5c6a484 100644
--- a/js/sample.html
+++ b/js/sample.html
@@ -3,15 +3,10 @@
 <head>
 	<meta charset="utf-8">
 	<script type="text/javascript" src="qrcode.js"></script>
-	<!-- SJIS Support (optional) -->
+	<!-- SJIS Support (optional), also makes it the default encoding -->
 	<script type="text/javascript" src="qrcode_SJIS.js"></script>
-	<!--
-	<script type="text/javascript" src="qrcode_SJIS.js"></script>
-	-->
-	<!-- Uncomment to encode string in qrcode as UTF8 (optional) -->
-	<!--
-	<script type="text/javascript" src="qrcode_UTF8.js"></script>
-	-->
+	<!-- Uncomment below to encode string in qrcode as UTF8 by default -->
+	<!--<script type="text/javascript" src="qrcode_UTF8.js"></script>-->
 	<script type="text/javascript" src="sample.js"></script>
 	<title>QR Code Generator for JavaScript</title>
 	<link rel="stylesheet" href="sample.css">
@@ -22,6 +17,8 @@ <h1>QR Code Generator for JavaScript</h1>
 	<form name="qrForm">
 	<p>
 		<textarea name="msg">Type your message here.</textarea><br>
+		<label><input name="trim" type="checkbox" checked> Trim whitespace</label>
+		&nbsp;
 		<span id="length"></span>
 	</p>
 	<p>
@@ -30,14 +27,6 @@ <h1>QR Code Generator for JavaScript</h1>
 		&nbsp;
 		Padding:
 		<input name="padding" type="number" min="0" max="9" value="1" size="3">
-		&nbsp;
-		Error correction level:
-		<select name="e">
-			<option value="L" selected>Low (7%)</option>
-			<option value="M">Medium (15%)</option>
-			<option value="Q">Quartile (25%)</option>
-			<option value="H">High (30%)</option>
-		</select>
 	</p>
 	<p>
 		Image type:
@@ -77,7 +66,71 @@ <h1>QR Code Generator for JavaScript</h1>
 		</select>
 		&nbsp;
 		Size type:
-		<select name="t"></select>
+		<select name="t">
+			<option value="0" selected>Auto</option>
+			<option value="1">1</option>
+			<option value="2">2</option>
+			<option value="3">3</option>
+			<option value="4">4</option>
+			<option value="5">5</option>
+			<option value="6">6</option>
+			<option value="7">7</option>
+			<option value="8">8</option>
+			<option value="9">9</option>
+			<option value="10">10</option>
+			<option value="11">11</option>
+			<option value="12">12</option>
+			<option value="13">13</option>
+			<option value="14">14</option>
+			<option value="15">15</option>
+			<option value="16">16</option>
+			<option value="17">17</option>
+			<option value="18">18</option>
+			<option value="19">19</option>
+			<option value="20">20</option>
+			<option value="21">21</option>
+			<option value="22">22</option>
+			<option value="23">23</option>
+			<option value="24">24</option>
+			<option value="25">25</option>
+			<option value="26">26</option>
+			<option value="27">27</option>
+			<option value="28">28</option>
+			<option value="29">29</option>
+			<option value="30">30</option>
+			<option value="31">31</option>
+			<option value="32">32</option>
+			<option value="33">33</option>
+			<option value="34">34</option>
+			<option value="35">35</option>
+			<option value="36">36</option>
+			<option value="37">37</option>
+			<option value="38">38</option>
+			<option value="39">39</option>
+			<option value="40">40</option>
+		</select>
+	</p>
+	<p>
+		Error correction level:
+		<select name="e">
+			<option value="L" selected>Low (7%)</option>
+			<option value="M">Medium (15%)</option>
+			<option value="Q">Quartile (25%)</option>
+			<option value="H">High (30%)</option>
+		</select>
+		&nbsp;
+		Mask pattern:
+		<select name="mask">
+			<option value="0" selected>Best</option>
+			<option value="1">1</option>
+			<option value="2">2</option>
+			<option value="3">3</option>
+			<option value="4">4</option>
+			<option value="5">5</option>
+			<option value="6">6</option>
+			<option value="7">7</option>
+			<option value="8">8</option>
+		</select>
 	</p>
 	<div id="qr"></div>
 	<p>
diff --git a/js/sample.js b/js/sample.js
index 111f5b4..7a71869 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -1,21 +1,8 @@
 var downloadFileName, downloadType, downloadData;
 
 var body_loadHander = function () {
-	var crtOpt = function (value, label) {
-		let opt = document.createElement('option');
-		opt.appendChild(document.createTextNode(label));
-		opt.value = value;
-		return opt;
-	};
-
-	let t = document.forms['qrForm'].elements['t'];
-	t.appendChild(crtOpt('' + 0, 'Auto'));
-	for (let i = 1; i <= 40; i += 1) {
-		t.appendChild(crtOpt('' + i, '' + i));
-	}
-	t.value = '0';
-
 	let form = document.forms['qrForm'];
+	form.elements['trim'].addEventListener("click", update_qrcode);
 	form.elements['msg'].addEventListener("input", update_qrcode);
 	form.elements['t'].addEventListener("change", update_qrcode);
 	form.elements['cellsize'].addEventListener("input", update_qrcode);
@@ -26,6 +13,7 @@ var body_loadHander = function () {
 	form.elements['format'].addEventListener("change", update_qrcode);
 	form.elements['foreground'].addEventListener("change", update_qrcode);
 	form.elements['background'].addEventListener("change", update_qrcode);
+	form.elements['mask'].addEventListener("change", update_qrcode);
 	update_qrcode();
 
 	document.getElementById("download").addEventListener("click", function () {
@@ -38,7 +26,7 @@ var draw_qrcode = function (text, typeNumber, errorCorrectionLevel) {
 	document.write(create_qrcode(text, typeNumber, errorCorrectionLevel));
 };
 
-var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrectionLevel, mode, mb, format, fg, bg) {
+var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrectionLevel, mode, mb, format, fg, bg, mask) {
 	if (!mode) {
 		if (text.match(/^[0-9]+$/))
 			mode = "Numeric";
@@ -65,14 +53,35 @@ var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrecti
 		qrcode.stringToBytes = qrcode.stringToBytesFuncs[mb];
 
 		let qr = qrcode(typeNumber || 0, errorCorrectionLevel || 'M');
+		if (mask > 0)
+			qr.setMaskPattern(mask - 1);
 		qr.addData(text, mode);
 		qr.make();
 		qr.setColors(fg, bg);
 
+		let maskPattern = qr.getMaskPattern();
+		let bestMaskPattern = qr.getBestMaskPattern();
+		let scores = qr.getMaskPatternPenaltyScores();
+		let minScore = Math.min.apply(null, scores);
+		let maskField = document.forms['qrForm'].elements['mask'];
+		for (let i = 0; i <= 8; i++) {
+			if (i === 0) {
+				maskField.children[i].textContent = "Best (" + (bestMaskPattern + 1) + ")";
+			}
+			else if (scores[i - 1] === minScore) {
+				maskField.children[i].textContent = i + " (best)";
+			}
+			else {
+				let worse = scores[i - 1] / minScore - 1;
+				maskField.children[i].textContent = i + " (" + (Math.round(worse * 1000) / 10) + "% worse)";
+			}
+		}
+
 		let size = qr.getModuleCount() * cellsize + padding * 2;
 		info.innerHTML = "Size type: <b>" + qr.getTypeNumber() + "</b>, " +
 			"code columns: <b>" + qr.getModuleCount() + "</b>, " +
-			"image size: <b>" + size + "x" + size + " px</b>";
+			"filled blocks: <b>" + qr.getDarkCount() + "</b> (" + Math.round(qr.getDarkCount() / (qr.getModuleCount() * qr.getModuleCount()) * 100) + "%)<br>" +
+			"Image size: <b>" + size + "x" + size + " px</b>";
 
 		switch (format) {
 			case "svg":
@@ -126,6 +135,7 @@ var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrecti
 		}
 	}
 	catch (error) {
+		console.error(error);
 		info.innerHTML = "Error: " + error;
 		return "";
 	}
@@ -133,7 +143,10 @@ var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrecti
 
 var update_qrcode = function () {
 	let form = document.forms['qrForm'];
-	let text = form.elements['msg'].value.replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');
+	let trim = form.elements['trim'].checked;
+	let text = form.elements['msg'].value;
+	if (trim)
+		text = text.replace(/^[\s\u3000]+|[\s\u3000]+$/g, '');   // U+3000 Ideographic Space
 	let t = form.elements['t'].value;
 	let cellsize = +form.elements['cellsize'].value;
 	let padding = +form.elements['padding'].value * cellsize;
@@ -143,8 +156,9 @@ var update_qrcode = function () {
 	let format = form.elements['format'].value;
 	let fg = form.elements['foreground'].value;
 	let bg = form.elements['background'].value;
+	let mask = form.elements['mask'].value;
 	document.getElementById("length").innerHTML = "(" + text.length + " characters)";
-	document.getElementById('qr').innerHTML = create_qrcode(text, t, cellsize, padding, e, m, mb, format, fg, bg);
+	document.getElementById('qr').innerHTML = create_qrcode(text, t, cellsize, padding, e, m, mb, format, fg, bg, mask);
 };
 
 // Source: https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server

From 985860d3e6c42b5d174132a4ecce4a8c0c88f88f Mon Sep 17 00:00:00 2001
From: Yves Goergen <git@ygoe.de>
Date: Mon, 13 Nov 2023 21:03:42 +0100
Subject: [PATCH 8/8] Always use default monospace font for ASCII output to
 prevent misalignment from styled fonts set by CSS

---
 js/sample.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/sample.js b/js/sample.js
index 7a71869..a46c974 100644
--- a/js/sample.js
+++ b/js/sample.js
@@ -119,13 +119,13 @@ var create_qrcode = function (text, typeNumber, cellsize, padding, errorCorrecti
 				downloadType = "text/plain";
 				downloadData = qr.createASCII(cellsize, padding);
 				showLength(downloadData.length);
-				return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+				return "<pre style='color: " + fg + "; background: " + bg + "; font-family: monospace;'>" + downloadData + "</pre>";
 			case "ascii-inv":
 				downloadFileName = "qr.txt";
 				downloadType = "text/plain";
 				downloadData = qr.createASCII(cellsize, padding, true);
 				showLength(downloadData.length);
-				return "<pre style='color: " + fg + "; background: " + bg + ";'>" + downloadData + "</pre>";
+				return "<pre style='color: " + fg + "; background: " + bg + "; font-family: monospace;'>" + downloadData + "</pre>";
 			case "table":
 				downloadFileName = "qr.html";
 				downloadType = "text/html";