DuotoneMode       583 coders/psd.c       case DuotoneMode: return "Duotone";
DuotoneMode      1262 coders/psd.c        (psd_info->mode == DuotoneMode))
DuotoneMode      1832 coders/psd.c         (psd_info.mode == DuotoneMode))
DuotoneMode      1854 coders/psd.c         if (psd_info.mode == DuotoneMode)