QR Code multi-format 1D/2D barcode

九月 12, 2016

1.QR code free
zxing library: https://github.com/zxing/zxing
How to create QRcode: http://www.swetake.com/qrcode/index-e.html
Open Source QR Code Library: https://osdn.jp/projects/qrcode
jquery.qrcode.js: https://github.com/jeromeetienne/jquery-qrcode

2.PDF417 no utf-16
3.DM no free
https://en.wikipedia.org/wiki/VCard

/* utf.js - UTF-8 <=> UTF-16 convertion
 *
 * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp> 
 * Version: 1.0
 * LastModified: Dec 25 1999
 * This library is free.  You can redistribute it and/or modify it.
 */

/*
 * Interfaces:
 * utf8 = utf16to8(utf16);
 * utf16 = utf16to8(utf8);
 */

function utf16to8(str) {
    var out, i, len, c;

    out = "";
    len = str.length;
    for(i = 0; i < len; i++) {
 c = str.charCodeAt(i);
 if ((c >= 0x0001) && (c <= 0x007F)) {
     out += str.charAt(i);
 } else if (c > 0x07FF) {
     out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
     out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
     out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
 } else {
     out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
     out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
 }
    }
    return out;
}

function utf8to16(str) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = str.length;
    i = 0;
    while(i < len) {
 c = str.charCodeAt(i++);
 switch(c >> 4)
 { 
   case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
     // 0xxxxxxx
     out += str.charAt(i-1);
     break;
   case 12: case 13:
     // 110x xxxx   10xx xxxx
     char2 = str.charCodeAt(i++);
     out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
     break;
   case 14:
     // 1110 xxxx  10xx xxxx  10xx xxxx
     char2 = str.charCodeAt(i++);
     char3 = str.charCodeAt(i++);
     out += String.fromCharCode(((c & 0x0F) << 12) |
        ((char2 & 0x3F) << 6) |
        ((char3 & 0x3F) << 0));
     break;
 }
    }

    return out;
}

----------------------
<!DOCTYPE html>
<html>
<head>
<title>basic example</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>

<script type="text/javascript" src="js/jquery.qrcode.min.js"></script>
<script type="text/javascript" src="js/qrcode.min.js"></script>

<p>Render in table</p>
<div id="qrcodeTable"></div>
<p>Render in canvas</p>
<div id="qrcodeCanvas"></div>
<hr>
<div id="qrcodeCanvas2"></div>
<script>
    //jQuery('#qrcode').qrcode("this plugin is great");
    jQuery('#qrcodeTable').qrcode({
        render    : "table",
        text    : "http://joinxin.blogspot.com Jin XinChen"
    });
    jQuery('#qrcodeCanvas').qrcode({
        text    : "joinxin.blogspot.com Jin XinChen"
    });
     jQuery('#qrcodeCanvas2').qrcode({
    render   : "canvas",
    width:56,
    height:56,
    typeNumber:-1,
    correctLevel : 2,
    background:"#ffffff",
    foreground:"#000000",
        text:"joinxin.blogspot.com Jin XinChen"
    });

</script>

</body>
</html>

4. https://github.com/zxing/zxing update in C#
using System;
using ZXing.QrCode;
string contentStr="id2-4905-jin";
var writeQR= new ZXing.BarcodeWriterQRPixelData
{
   Format = ZXing.BarcodeFormat.QR_CODE,
   Options = new QrCodeEncodingOptions{ Height = 100, Width = 100, Margin = 2 }
};
var QRPixelData = writeQR.Write(contentStr);
using (var bitmap = new System.Drawing.Bitmap(QRPixelData.Width, QRPixelData.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb))
   {
    var bitmapData = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, QRPixelData.Width, QRPixelData.Height),
        System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
    try
      {
       //The row stride of the bitmap is aligned to 4 byte multiplied by the width of the image
       System.Runtime.InteropServices.Marshal.Copy(QRPixelData.Pixels, 0, bitmapData.Scan0,
                           QRPixelData.Pixels.Length);
       }
       finally
       {
          bitmap.UnlockBits(bitmapData);
        }
        bitmap.Save("./wwwroot/images/" + contentStr + ".png", System.Drawing.Imaging.ImageFormat.Png);
    }

5. reference :https://stackoverflow.com/questions/8859268/how-to-encode-a-string-in-a-qr-code-using-zxing-on-android
java

public static Bitmap encodeToQrCode(String text, int width, int height){
    QRCodeWriter writer = new QRCodeWriter();
    BitMatrix matrix = null;
    try {
        matrix = writer.encode(text, BarcodeFormat.QR_CODE, 100, 100);
    } catch (WriterException ex) {
        ex.printStackTrace();
    }
    Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
    for (int x = 0; x < width; x++){
        for (int y = 0; y < height; y++){
            bmp.setPixel(x, y, matrix.get(x,y) ? Color.BLACK : Color.WHITE);
        }
    }
    return bmp;
}

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QR Code multi-format 1D/2D barcode

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