private Result[] decodeMulti(Uri uri, IDictionary<DecodeHintType, object> hints)
{
Bitmap image;
try
{
image = (Bitmap)Bitmap.FromFile(uri.LocalPath);
}
catch (Exception)
{
throw new FileNotFoundException("Resource not found: " + uri);
}
LuminanceSource source;
if (config.Crop == null)
{
source = new BitmapLuminanceSource(image);
}
else
{
int[] crop = config.Crop;
source = new BitmapLuminanceSource(image).crop(crop[0], crop[1], crop[2], crop[3]);
}
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
if (config.DumpBlackPoint)
{
dumpBlackPoint(uri, image, bitmap);
}
MultiFormatReader multiFormatReader = new MultiFormatReader();
GenericMultipleBarcodeReader reader = new GenericMultipleBarcodeReader(
multiFormatReader);
Result[] results = reader.decodeMultiple(bitmap, hints);
if (results != null && results.Length > 0)
{
if (config.Brief)
{
Console.Out.WriteLine(uri + ": Success");
}
else
{
foreach (var result in results)
{
ParsedResult parsedResult = ResultParser.parseResult(result);
Console.Out.WriteLine(uri + " (format: "
+ result.BarcodeFormat + ", type: "
+ parsedResult.Type + "):\nRaw result:\n"
+ result.Text + "\nParsed result:\n"
+ parsedResult.DisplayResult);
Console.Out.WriteLine("Found " + result.ResultPoints.Length + " result points.");
for (int i = 0; i < result.ResultPoints.Length; i++)
{
ResultPoint rp = result.ResultPoints[i];
Console.Out.WriteLine(" Point " + i + ": (" + rp.X + ',' + rp.Y + ')');
}
}
}
return results;
}
else
{
Console.Out.WriteLine(uri + ": No barcode found");
}
return null;
}
/// <summary>
/// Tries to decode barcodes within an image which is given by a luminance source.
/// That method gives a chance to prepare a luminance source completely before calling
/// the time consuming decoding method. On the other hand there is a chance to create
/// a luminance source which is independent from external resources (like Bitmap objects)
/// and the decoding call can be made in a background thread.
/// </summary>
/// <param name="luminanceSource">The luminance source.</param>
/// <returns></returns>
private Result[] DecodeMultiple(LuminanceSource luminanceSource)
{
var results = default(Result[]);
var binarizer = CreateBinarizer(luminanceSource);
var binaryBitmap = new BinaryBitmap(binarizer);
var rotationCount = 0;
var rotationMaxCount = 1;
MultipleBarcodeReader multiReader = null;
if (AutoRotate)
{
Options.Hints[DecodeHintType.TRY_HARDER_WITHOUT_ROTATION] = true;
rotationMaxCount = 4;
}
var formats = Options.PossibleFormats;
if (formats != null &&
formats.Length == 1 &&
formats[0] == BarcodeFormat.QR_CODE)
{
multiReader = new QRCodeMultiReader();
}
else
{
multiReader = new GenericMultipleBarcodeReader(Reader);
}
for (; rotationCount < rotationMaxCount; rotationCount++)
{
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
if (results == null)
{
if (TryInverted && luminanceSource.InversionSupported)
{
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.invert()));
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
}
}
if (results != null ||
!luminanceSource.RotateSupported ||
!AutoRotate)
break;
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.rotateCounterClockwise()));
}
if (results != null)
{
foreach (var result in results)
{
if (result.ResultMetadata == null)
{
result.putMetadata(ResultMetadataType.ORIENTATION, rotationCount * 90);
}
else if (!result.ResultMetadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
result.ResultMetadata[ResultMetadataType.ORIENTATION] = rotationCount * 90;
}
else
{
// perhaps the core decoder rotates the image already (can happen if TryHarder is specified)
result.ResultMetadata[ResultMetadataType.ORIENTATION] =
((int)(result.ResultMetadata[ResultMetadataType.ORIENTATION]) + rotationCount * 90) % 360;
}
}
OnResultsFound(results);
}
return results;
}