Question

I’m having trouble generating a QR code on mango 7.1 with ZXing 2.0.
It should be pretty straight forward, but it’s not working.

The code:

QRCodeWriter writer = new QRCodeWriter();
var bMatrix = writer.encode("Hey dude, QR FTW!", BarcodeFormat.QR_CODE, 25, 25);
var asBitmap = bMatrix.ToBitmap();            
image1.Source = asBitmap;

image1 comes from the xaml.

bMatrix seems to contain the data that I need, but image1 never shows a thing.

Answer 1

So I managed to do a workaround. I’m not sure if my original code didnt work due to a bug in the ZXing C# port or if I did something wrong. Anyhow, here is what I did to show the QR code.

image1 comes from xaml.

QRCodeWriter writer = new QRCodeWriter();
var bMatrix = writer.encode("Hey dude! QR FTW!", BarcodeFormat.QR_CODE, width, height);

WriteableBitmap wbmi = new System.Windows.Media.Imaging.WriteableBitmap(width, height);

for (int y = 0; y < height; y++)
{
    for (int x = 0; x < width; x++)
    {
        int grayValue = bMatrix.Array[y][x] & 0xff;
        if (grayValue == 0)                        
            wbmi.SetPixel(x, y, Color.FromArgb(255, 0, 0,0));                                                    
         else
             wbmi.SetPixel(x, y, Color.FromArgb(255, 255, 255, 255));
     }
 }
 image1.Source = wbmi;