This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.
Three standard operators set up halftone screens: setscreen, setcolorscreen and sethalftone; and corresponding query operators: currentscreen, currentcolorscreen and currenthalftone. As well as the system parameters described above which control the behavior of these operators, the RIP has some minor variations from the description in [RB3]. The RIP also provides a further query operator, screenforall.
For information regarding GGS extension HalftoneType 100, see the API Reference Manual, “Screening interface”.
For information regarding GGS extension HalftoneType 1009, see Technical Note Hqn094: Mixing multi-bit screens.