public void start_pass(J_BUF_MODE pass_mode)
{
/* Do nothing in raw-data mode. */
if (m_cinfo.m_raw_data_in)
return;
m_cur_iMCU_row = 0; /* initialize counters */
m_rowgroup_ctr = 0;
m_suspended = false;
if (pass_mode != J_BUF_MODE.JBUF_PASS_THRU)
m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_BAD_BUFFER_MODE);
}