public static byte[] GetQRCode(string txt, ECCLevel eccLevel, int size)
{
using (var qrGen = new QRCodeGenerator())
using (var qrCode = qrGen.CreateQrCode(txt, eccLevel))
using (var qrPng = new PngByteQRCode(qrCode))
return(qrPng.GetGraphic(size));
}
public static byte[] GetQRCode(string plainText, int pixelsPerModule, byte[] darkColorRgba, byte[] lightColorRgba, ECCLevel eccLevel, bool forceUtf8 = false, bool utf8BOM = false, EciMode eciMode = EciMode.Default, int requestedVersion = -1)
{
using (var qrGenerator = new QRCodeGenerator())
using (var qrCodeData = qrGenerator.CreateQrCode(plainText, eccLevel, forceUtf8, utf8BOM, eciMode, requestedVersion))
using (var qrCode = new PngByteQRCode(qrCodeData))
return(qrCode.GetGraphic(pixelsPerModule, darkColorRgba, lightColorRgba));
}
public static byte[] GetQRCode(string txt, QRCodeGenerator.ECCLevel eccLevel, int size, bool drawQuietZones = true)
{
using (var qrGen = new QRCodeGenerator())
using (var qrCode = qrGen.CreateQrCode(txt, eccLevel))
using (var qrPng = new PngByteQRCode(qrCode))
return(qrPng.GetGraphic(size, drawQuietZones));
}
/// <summary>
/// Creates a PDF document with given colors DPI and quality
/// </summary>
/// <param name="pixelsPerModule"></param>
/// <param name="darkColorHtmlHex"></param>
/// <param name="lightColorHtmlHex"></param>
/// <param name="dpi"></param>
/// <param name="jpgQuality"></param>
/// <returns></returns>
public byte[] GetGraphic(int pixelsPerModule, string darkColorHtmlHex, string lightColorHtmlHex, int dpi = 150, long jpgQuality = 85)
{
byte[] jpgArray = null, pngArray = null;
var imgSize = QrCodeData.ModuleMatrix.Count * pixelsPerModule;
var pdfMediaSize = (imgSize * 72 / dpi).ToString(CultureInfo.InvariantCulture);
//Get QR code image
using (var qrCode = new PngByteQRCode(QrCodeData)) pngArray = qrCode.GetGraphic(pixelsPerModule, HexColorToByteArray(darkColorHtmlHex), HexColorToByteArray(lightColorHtmlHex));
//Create image and transofrm to JPG
using (var msPng = new MemoryStream())
{
msPng.Write(pngArray, 0, pngArray.Length);
var img = Image.FromStream(msPng);
using (var msJpeg = new MemoryStream())
{
// Create JPEG with specified quality
var jpgImageCodecInfo = ImageCodecInfo.GetImageEncoders().First(x => x.MimeType == "image/jpeg");
var jpgEncoderParameters = new EncoderParameters(1)
{
Param = new[] { new EncoderParameter(Encoder.Quality, jpgQuality) }
};
img.Save(msJpeg, jpgImageCodecInfo, jpgEncoderParameters);
jpgArray = msJpeg.ToArray();
}
}
//Create PDF document
using (var stream = new MemoryStream())
{
var writer = new StreamWriter(stream, Encoding.GetEncoding("ASCII"));
var xrefs = new List <long>();
writer.Write("%PDF-1.5\r\n");
writer.Flush();
stream.Write(pdfBinaryComment, 0, pdfBinaryComment.Length);
writer.WriteLine();
writer.Flush();
xrefs.Add(stream.Position);
writer.Write(
xrefs.Count + " 0 obj\r\n" +
"<<\r\n" +
"/Type /Catalog\r\n" +
"/Pages 2 0 R\r\n" +
">>\r\n" +
"endobj\r\n"
);
writer.Flush();
xrefs.Add(stream.Position);
writer.Write(
xrefs.Count + " 0 obj\r\n" +
"<<\r\n" +
"/Count 1\r\n" +
"/Kids [ <<\r\n" +
"/Type /Page\r\n" +
"/Parent 2 0 R\r\n" +
"/MediaBox [0 0 " + pdfMediaSize + " " + pdfMediaSize + "]\r\n" +
"/Resources << /ProcSet [ /PDF /ImageC ]\r\n" +
"/XObject << /Im1 4 0 R >> >>\r\n" +
"/Contents 3 0 R\r\n" +
">> ]\r\n" +
">>\r\n" +
"endobj\r\n"
);
var X = "q\r\n" +
pdfMediaSize + " 0 0 " + pdfMediaSize + " 0 0 cm\r\n" +
"/Im1 Do\r\n" +
"Q";
writer.Flush();
xrefs.Add(stream.Position);
writer.Write(
xrefs.Count + " 0 obj\r\n" +
"<< /Length " + X.Length + " >>\r\n" +
"stream\r\n" +
X + "endstream\r\n" +
"endobj\r\n"
);
writer.Flush();
xrefs.Add(stream.Position);
writer.Write(
xrefs.Count + " 0 obj\r\n" +
"<<\r\n" +
"/Name /Im1\r\n" +
"/Type /XObject\r\n" +
"/Subtype /Image\r\n" +
"/Width " + imgSize + "/Height " + imgSize + "/Length 5 0 R\r\n" +
"/Filter /DCTDecode\r\n" +
"/ColorSpace /DeviceRGB\r\n" +
"/BitsPerComponent 8\r\n" +
">>\r\n" +
"stream\r\n"
);
writer.Flush();
stream.Write(jpgArray, 0, jpgArray.Length);
writer.Write(
"\r\n" +
"endstream\r\n" +
"endobj\r\n"
);
writer.Flush();
xrefs.Add(stream.Position);
writer.Write(
xrefs.Count + " 0 obj\r\n" +
jpgArray.Length + " endobj\r\n"
);
writer.Flush();
var startxref = stream.Position;
writer.Write(
"xref\r\n" +
"0 " + (xrefs.Count + 1) + "\r\n" +
"0000000000 65535 f\r\n"
);
foreach (var refValue in xrefs)
{
writer.Write(refValue.ToString("0000000000") + " 00000 n\r\n");
}
writer.Write(
"trailer\r\n" +
"<<\r\n" +
"/Size " + (xrefs.Count + 1) + "\r\n" +
"/Root 1 0 R\r\n" +
">>\r\n" +
"startxref\r\n" +
startxref + "\r\n" +
"%%EOF"
);
writer.Flush();
stream.Position = 0;
return(stream.ToArray());
}
}
