public static TiffBaseDecompressor Create(
Configuration configuration,
TiffDecoderCompressionType method,
MemoryAllocator allocator,
TiffPhotometricInterpretation photometricInterpretation,
int width,
int bitsPerPixel,
TiffColorType colorType,
TiffPredictor predictor,
FaxCompressionOptions faxOptions,
byte[] jpegTables,
TiffFillOrder fillOrder,
ByteOrder byteOrder)
{
switch (method)
{
case TiffDecoderCompressionType.None:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
DebugGuard.IsTrue(faxOptions == FaxCompressionOptions.None, "No fax compression options are expected");
return(new NoneTiffCompression(allocator, width, bitsPerPixel));
case TiffDecoderCompressionType.PackBits:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
DebugGuard.IsTrue(faxOptions == FaxCompressionOptions.None, "No fax compression options are expected");
return(new PackBitsTiffCompression(allocator, width, bitsPerPixel));
case TiffDecoderCompressionType.Deflate:
DebugGuard.IsTrue(faxOptions == FaxCompressionOptions.None, "No fax compression options are expected");
return(new DeflateTiffCompression(allocator, width, bitsPerPixel, colorType, predictor, byteOrder == ByteOrder.BigEndian));
case TiffDecoderCompressionType.Lzw:
DebugGuard.IsTrue(faxOptions == FaxCompressionOptions.None, "No fax compression options are expected");
return(new LzwTiffCompression(allocator, width, bitsPerPixel, colorType, predictor, byteOrder == ByteOrder.BigEndian));
case TiffDecoderCompressionType.T4:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new T4TiffCompression(allocator, fillOrder, width, bitsPerPixel, faxOptions, photometricInterpretation));
case TiffDecoderCompressionType.T6:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new T6TiffCompression(allocator, fillOrder, width, bitsPerPixel, photometricInterpretation));
case TiffDecoderCompressionType.HuffmanRle:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new ModifiedHuffmanTiffCompression(allocator, fillOrder, width, bitsPerPixel, photometricInterpretation));
case TiffDecoderCompressionType.Jpeg:
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new JpegTiffCompression(configuration, allocator, width, bitsPerPixel, jpegTables, photometricInterpretation));
default:
throw TiffThrowHelper.NotSupportedDecompressor(nameof(method));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T4TiffCompression" /> class.
/// </summary>
/// <param name="allocator">The memory allocator.</param>
/// <param name="fillOrder">The logical order of bits within a byte.</param>
/// <param name="width">The image width.</param>
/// <param name="bitsPerPixel">The number of bits per pixel.</param>
/// <param name="faxOptions">Fax compression options.</param>
/// <param name="photometricInterpretation">The photometric interpretation.</param>
public T4TiffCompression(
MemoryAllocator allocator,
TiffFillOrder fillOrder,
int width,
int bitsPerPixel,
FaxCompressionOptions faxOptions,
TiffPhotometricInterpretation photometricInterpretation)
: base(allocator, width, bitsPerPixel)
{
this.faxCompressionOptions = faxOptions;
this.FillOrder = fillOrder;
this.width = width;
bool isWhiteZero = photometricInterpretation == TiffPhotometricInterpretation.WhiteIsZero;
this.whiteValue = (byte)(isWhiteZero ? 0 : 1);
this.blackValue = (byte)(isWhiteZero ? 1 : 0);
}
