BitMiracle.LibJpeg.Classic.Internal.jpeg_d_main_controller.start_pass C# (CSharp) Method

        public void start_pass(J_BUF_MODE pass_mode)
        {
            switch (pass_mode)
            {
                case J_BUF_MODE.JBUF_PASS_THRU:
                    if (m_cinfo.m_upsample.NeedContextRows())
                    {
                        m_dataProcessor = DataProcessor.context_main;
                        make_funny_pointers(); /* Create the xbuffer[] lists */
                        m_whichFunny = 0; /* Read first iMCU row into xbuffer[0] */
                        m_context_state = CTX_PREPARE_FOR_IMCU;
                        m_iMCU_row_ctr = 0;
                    }
                    else
                    {
                        /* Simple case with no context needed */
                        m_dataProcessor = DataProcessor.simple_main;
                    }
                    m_buffer_full = false;  /* Mark buffer empty */
                    m_rowgroup_ctr = 0;
                    break;
                case J_BUF_MODE.JBUF_CRANK_DEST:
                    /* For last pass of 2-pass quantization, just crank the postprocessor */
                    m_dataProcessor = DataProcessor.crank_post;
                    break;
                default:
                    m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_BAD_BUFFER_MODE);
                    break;
            }
        }