private ZXing.LuminanceSource BitmapToLuminanceSource(System.Drawing.Bitmap bitmap)
{
using (MemoryStream memoryStream = new MemoryStream())
{
bitmap.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] arr = memoryStream.GetBuffer();
ZXing.LuminanceSource source = new ZXing.RGBLuminanceSource(
arr,
bitmap.Width,
bitmap.Height,
ZXing.RGBLuminanceSource.BitmapFormat.Unknown);
return(source);
}
}
public static string QRDecoder(System.IO.Stream qrCodeFileStream)
{
var sKManagedStream = new SkiaSharp.SKManagedStream(qrCodeFileStream, true);
var sKBitmap = SkiaSharp.SKBitmap.Decode(sKManagedStream);
sKManagedStream.Dispose();
if (sKBitmap.IsEmpty)
{
sKBitmap.Dispose();
throw new Exception("未识别的图片文件");
}
var w = sKBitmap.Width;
var h = sKBitmap.Height;
int ps = w * h;
byte[] bytes = new byte[ps * 3];
int byteIndex = 0;
for (var x = 0; x < w; x++)
{
for (var y = 0; y < h; y++)
{
var color = sKBitmap.GetPixel(x, y);
bytes[byteIndex + 0] = color.Red;
bytes[byteIndex + 1] = color.Green;
bytes[byteIndex + 2] = color.Blue;
byteIndex += 3;
}
}
sKBitmap.Dispose();
var qRCodeReader = new ZXing.QrCode.QRCodeReader();
var rGBLuminanceSource = new ZXing.RGBLuminanceSource(bytes, w, h);
var hybridBinarizer = new ZXing.Common.HybridBinarizer(rGBLuminanceSource);
var binaryBitmap = new ZXing.BinaryBitmap(hybridBinarizer);
var hints = new Dictionary <ZXing.DecodeHintType, object>();
hints.Add(ZXing.DecodeHintType.CHARACTER_SET, "utf-8");
var result = qRCodeReader.decode(binaryBitmap, hints);
return(result != null ? result.Text : "");
}
