BitMiracle.LibJpeg.Classic.jpeg_compress_struct.jpeg_write_raw_data C# (CSharp) Method

        public int jpeg_write_raw_data(byte[][][] data, int num_lines)
        {
            if (m_global_state != JpegState.CSTATE_RAW_OK)
                ERREXIT(J_MESSAGE_CODE.JERR_BAD_STATE, (int)m_global_state);

            if (m_next_scanline >= m_image_height)
            {
                WARNMS(J_MESSAGE_CODE.JWRN_TOO_MUCH_DATA);
                return 0;
            }

            /* Call progress monitor hook if present */
            if (m_progress != null)
            {
                m_progress.Pass_counter = m_next_scanline;
                m_progress.Pass_limit = m_image_height;
                m_progress.Updated();
            }

            /* Give master control module another chance if this is first call to
            * jpeg_write_raw_data.  This lets output of the frame/scan headers be
            * delayed so that application can write COM, etc, markers between
            * jpeg_start_compress and jpeg_write_raw_data.
            */
            if (m_master.MustCallPassStartup())
                m_master.pass_startup();

            /* Verify that at least one iMCU row has been passed. */
            int lines_per_iMCU_row = m_max_v_samp_factor * min_DCT_v_scaled_size;
            if (num_lines < lines_per_iMCU_row)
                ERREXIT(J_MESSAGE_CODE.JERR_BUFFER_SIZE);

            /* Directly compress the row. */
            if (!m_coef.compress_data(data))
            {
                /* If compressor did not consume the whole row, suspend processing. */
                return 0;
            }

            /* OK, we processed one iMCU row. */
            m_next_scanline += lines_per_iMCU_row;
            return lines_per_iMCU_row;
        }