BitMiracle.LibJpeg.Classic.Internal.jpeg_color_deconverter.ycck_cmyk_convert C# (CSharp) Method

        private void ycck_cmyk_convert(ComponentBuffer[] input_buf, int input_row, byte[][] output_buf, int output_row, int num_rows)
        {
            int component0RowOffset = m_perComponentOffsets[0];
            int component1RowOffset = m_perComponentOffsets[1];
            int component2RowOffset = m_perComponentOffsets[2];
            int component3RowOffset = m_perComponentOffsets[3];

            byte[] limit = m_cinfo.m_sample_range_limit;
            int limitOffset = m_cinfo.m_sampleRangeLimitOffset;

            int num_cols = m_cinfo.m_output_width;
            for (int row = 0; row < num_rows; row++)
            {
                int columnOffset = 0;
                for (int col = 0; col < num_cols; col++)
                {
                    int y = input_buf[0][input_row + component0RowOffset][col];
                    int cb = input_buf[1][input_row + component1RowOffset][col];
                    int cr = input_buf[2][input_row + component2RowOffset][col];

                    /* Range-limiting is essential due to noise introduced by DCT losses,
                     * and for extended gamut encodings (sYCC).
                     */
                    output_buf[output_row + row][columnOffset] = limit[limitOffset + JpegConstants.MAXJSAMPLE - (y + m_Cr_r_tab[cr])]; /* red */
                    output_buf[output_row + row][columnOffset + 1] = limit[limitOffset + JpegConstants.MAXJSAMPLE - (y + JpegUtils.RIGHT_SHIFT(m_Cb_g_tab[cb] + m_Cr_g_tab[cr], SCALEBITS))]; /* green */
                    output_buf[output_row + row][columnOffset + 2] = limit[limitOffset + JpegConstants.MAXJSAMPLE - (y + m_Cb_b_tab[cb])]; /* blue */

                    /* K passes through unchanged */
                    /* don't need GETJSAMPLE here */
                    output_buf[output_row + row][columnOffset + 3] = input_buf[3][input_row + component3RowOffset][col];
                    columnOffset += 4;
                }

                input_row++;
            }
        }