HPCFB_DC_SWITCHREQ
(((dc)->dc_state&(HPCFB_DC_DRAWING|HPCFB_DC_SWITCHREQ)) == 0))
odc->dc_state |= HPCFB_DC_SWITCHREQ;
odc->dc_state &= ~HPCFB_DC_SWITCHREQ;
odc->dc_state &= ~HPCFB_DC_SWITCHREQ;
odc->dc_state &= ~HPCFB_DC_SWITCHREQ;
dc->dc_state &= ~HPCFB_DC_SWITCHREQ;