Adjusting HqnImpose2 marks on every flat

This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP

The AdjustMargins prefix allows the position of marks on a flat design to be configured, but there are occasions when more dynamic control is required, for example, to select different ControlFile files for different separations in a pre-separated workflow. This can be done in a FilmOverlay procedure, which will be called immediately before the Marks array is processed at the end of every flat.

In the example below an extra key named /Colorant is assumed to have been added to every ControlFile dictionary in the Marks array, and only the mark where the value of this key matches the current separation name will be imaged:

              /FilmOverLay { Marks {
                  dup /Colorant known { begin
                  /Enabled Colorant currentsystemparams
                  /Separation get eq def end
                } { pop } ifelse
              } forall
            } bind