/// <inheritdoc/>
public void Encode <TPixel>(Image <TPixel> image, Stream stream)
where TPixel : unmanaged, IPixel <TPixel>
{
var encode = new TiffEncoderCore(this, image.GetMemoryAllocator());
encode.Encode(image, stream);
}
/// <inheritdoc/>
public Task EncodeAsync <TPixel>(Image <TPixel> image, Stream stream, CancellationToken cancellationToken)
where TPixel : unmanaged, IPixel <TPixel>
{
var encoder = new TiffEncoderCore(this, image.GetMemoryAllocator());
return(encoder.EncodeAsync(image, stream, cancellationToken));
}
private static ushort GetCompressionType(TiffEncoderCore encoder)
{
switch (encoder.CompressionType)
{
case TiffCompression.Deflate:
// Deflate is allowed for all modes.
return((ushort)TiffCompression.Deflate);
case TiffCompression.PackBits:
// PackBits is allowed for all modes.
return((ushort)TiffCompression.PackBits);
case TiffCompression.Lzw:
if (encoder.PhotometricInterpretation == TiffPhotometricInterpretation.Rgb ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.PaletteColor ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.BlackIsZero)
{
return((ushort)TiffCompression.Lzw);
}
break;
case TiffCompression.CcittGroup3Fax:
return((ushort)TiffCompression.CcittGroup3Fax);
case TiffCompression.Ccitt1D:
return((ushort)TiffCompression.Ccitt1D);
case TiffCompression.Jpeg:
return((ushort)TiffCompression.Jpeg);
}
return((ushort)TiffCompression.None);
}
private static uint GetSamplesPerPixel(TiffEncoderCore encoder)
{
switch (encoder.PhotometricInterpretation)
{
case TiffPhotometricInterpretation.PaletteColor:
case TiffPhotometricInterpretation.BlackIsZero:
case TiffPhotometricInterpretation.WhiteIsZero:
return(1);
case TiffPhotometricInterpretation.Rgb:
default:
return(3);
}
}
public void Process(TiffEncoderCore encoder)
{
var planarConfig = new ExifShort(ExifTagValue.PlanarConfiguration)
{
Value = (ushort)TiffPlanarConfiguration.Chunky
};
var samplesPerPixel = new ExifLong(ExifTagValue.SamplesPerPixel)
{
Value = GetSamplesPerPixel(encoder)
};
ushort[] bitsPerSampleValue = GetBitsPerSampleValue(encoder);
var bitPerSample = new ExifShortArray(ExifTagValue.BitsPerSample)
{
Value = bitsPerSampleValue
};
ushort compressionType = GetCompressionType(encoder);
var compression = new ExifShort(ExifTagValue.Compression)
{
Value = compressionType
};
var photometricInterpretation = new ExifShort(ExifTagValue.PhotometricInterpretation)
{
Value = (ushort)encoder.PhotometricInterpretation
};
this.Collector.AddOrReplace(planarConfig);
this.Collector.AddOrReplace(samplesPerPixel);
this.Collector.AddOrReplace(bitPerSample);
this.Collector.AddOrReplace(compression);
this.Collector.AddOrReplace(photometricInterpretation);
if (encoder.HorizontalPredictor == TiffPredictor.Horizontal)
{
if (encoder.PhotometricInterpretation == TiffPhotometricInterpretation.Rgb ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.PaletteColor ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.BlackIsZero)
{
var predictor = new ExifShort(ExifTagValue.Predictor)
{
Value = (ushort)TiffPredictor.Horizontal
};
this.Collector.AddOrReplace(predictor);
}
}
}
private static ushort[] GetBitsPerSampleValue(TiffEncoderCore encoder)
{
switch (encoder.PhotometricInterpretation)
{
case TiffPhotometricInterpretation.PaletteColor:
if (encoder.BitsPerPixel == TiffBitsPerPixel.Bit4)
{
return(TiffConstants.BitsPerSample4Bit.ToArray());
}
else
{
return(TiffConstants.BitsPerSample8Bit.ToArray());
}
case TiffPhotometricInterpretation.Rgb:
return(TiffConstants.BitsPerSampleRgb8Bit.ToArray());
case TiffPhotometricInterpretation.WhiteIsZero:
if (encoder.BitsPerPixel == TiffBitsPerPixel.Bit1)
{
return(TiffConstants.BitsPerSample1Bit.ToArray());
}
return(TiffConstants.BitsPerSample8Bit.ToArray());
case TiffPhotometricInterpretation.BlackIsZero:
if (encoder.BitsPerPixel == TiffBitsPerPixel.Bit1)
{
return(TiffConstants.BitsPerSample1Bit.ToArray());
}
return(TiffConstants.BitsPerSample8Bit.ToArray());
default:
return(TiffConstants.BitsPerSampleRgb8Bit.ToArray());
}
}
public void ProcessImageFormat(TiffEncoderCore encoder) => new ImageFormatProcessor(this).Process(encoder);
