public async static Task <Uri> ToQrDataUri(this ISdp sdp, int width, int height)
{
var qrCodeWriter = new QRCodeWriter();
var bitMatrix = qrCodeWriter.encode(sdp.ToString(), ZXing.BarcodeFormat.QR_CODE, width, height);
using (var canvasRenderTarget = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), 500, 500, 96))
{
using (var drawingSession = canvasRenderTarget.CreateDrawingSession())
{
for (var y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
drawingSession.DrawRectangle(x, y, 1, 1, bitMatrix.get(x, y) ? Color.FromArgb(0, 0, 0, 0) : Color.FromArgb(255, 255, 255, 255));
}
}
}
using (var inMemoryRandomAccessStream = new InMemoryRandomAccessStream())
{
await canvasRenderTarget.SaveAsync(inMemoryRandomAccessStream, CanvasBitmapFileFormat.Png);
inMemoryRandomAccessStream.Seek(0);
var buffer = new byte[inMemoryRandomAccessStream.Size];
await inMemoryRandomAccessStream.ReadAsync(buffer.AsBuffer(), (uint)inMemoryRandomAccessStream.Size, InputStreamOptions.None);
return(new Uri($"data:image/png;base64,{Convert.ToBase64String(buffer)}"));
}
}
}
public void Visit(ISdp sdp)
{
sdp.Visit(0, _member_name_[0], false, ref iValue);
sdp.Visit(1, _member_name_[1], false, ref strValue);
sdp.Visit(2, _member_name_[2], false, Values);
sdp.Visit(233, _member_name_[3], false, KeyValues);
}
public static ImageSource ToQrImageSource(this ISdp sdp, int width, int height)
{
var qrCodeWriter = new QRCodeWriter();
var bitMatrix = qrCodeWriter.encode(sdp.ToString(), ZXing.BarcodeFormat.QR_CODE, width, height);
var canvasImageSource = new CanvasImageSource(CanvasDevice.GetSharedDevice(), width, height, 96);
using (var drawingSession = canvasImageSource.CreateDrawingSession(Color.FromArgb(255, 255, 255, 255)))
{
for (var y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
if (bitMatrix.get(x, y))
{
drawingSession.DrawRectangle(x, y, 1, 1, Color.FromArgb(255, 0, 0, 0));
}
}
}
}
return(canvasImageSource);
}
