//not implemented into decode loop yet but debugged already...
public static byte[] FaxDecode(byte[] src, int columns, int rows, int k, int encodedByteAlign, int blackIs1)
{
sbyte[] source = (sbyte[])(Array)src;
int size = rows * ((columns + 7) >> 3);
sbyte[] destination = new sbyte[size];
CCITTFaxDecoder decoder = new CCITTFaxDecoder(1, columns, rows);
decoder.alignProperty = encodedByteAlign == 0 ? true : false;
if (k == 0)
{
decoder.decodeT41D(destination, source, 0, rows);
}
else if (k > 0)
{
decoder.decodeT42D(destination, source, 0, rows);
}
else if (k < 0)
{
decoder.decodeT6(destination, source, 0, rows);
}
if (blackIs1 == 0)
{
for (int i = 0; i < destination.Length; i++)
{
// bitwise not
destination[i] = (sbyte)~destination[i];
}
}
return((byte[])(Array)destination);
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
// get decode parameters
PdfDictionary decodeParms = parameters as PdfDictionary;
var ccittFaxParams = new CCITTFaxParams(
K: decodeParms.GetInt(PdfName.K),
endOfLine: decodeParms.GetBool(PdfName.EndOfLine),
encodedByteAlign: decodeParms.GetBool(PdfName.EncodedByteAlign),
columns: decodeParms.GetInt(PdfName.Columns),
rows: decodeParms.GetInt(PdfName.Rows),
endOfBlock: decodeParms.GetBool(PdfName.EndOfBlock),
blackIs1: decodeParms.GetBool(PdfName.BlackIs1)
);
var decoder = new CCITTFaxDecoder(data, ccittFaxParams);
using (var output = new Bytes.Buffer())
{
var currentByte = 0;
while ((currentByte = decoder.ReadNextChar()) > -1)
{
output.Append(FiltersExtension.ToByte(currentByte));
}
return(output.GetBuffer());
}
}
