BitMiracle.LibTiff.Classic.Tiff.writeTransferFunction C# (CSharp) Method

        private bool writeTransferFunction(ref TiffDirEntry dir)
        {
            // Check if the table can be written as a single column, or if it
            // must be written as 3 columns. Note that we write a 3-column tag
            // if there are 2 samples/pixel and a single column of data
            // won't suffice--hmm.
            int u = m_dir.td_samplesperpixel - m_dir.td_extrasamples;
            int ncols = 1;
            bool reCheck = false;
            int n = 1 << m_dir.td_bitspersample;

            if (u < 0 || u > 2)
            {
                if (Compare(m_dir.td_transferfunction[0], m_dir.td_transferfunction[2], n) != 0)
                    ncols = 3;
                else
                    reCheck = true;
            }

            if (u == 2 || reCheck)
            {
                if (Compare(m_dir.td_transferfunction[0], m_dir.td_transferfunction[1], n) != 0)
                    ncols = 3;
            }

            return writeShortTable(TiffTag.TRANSFERFUNCTION, ref dir, ncols, m_dir.td_transferfunction);
        }