Re: [Groff] Using Printer "Jogging" with groff

[Werner LEMBERG]

> The print bureau have told me I just need to insert this code on the
> page which I need "jogged":-
> 
> %%BeginFeature: *Jog
> << /Jog 3 >> setpagedevice
> %%EndFeature
> 
> so I set up two macros:-
> 
>       .de Jogger3
>       ps: exec
>       %%BeginFeature: *Jog
>       << /Jog 3 >> setpagedevice
>       %%EndFeature
>       ..
>       .de Jogger0
>       ps: exec
>       %%BeginFeature: *Jog
>       << /Jog 0 >> setpagedevice
>       %%EndFeature
>       ..
> 
> which I use by:-
> 
>       \Y[Jogger3]
> 
> and
> 
>       \Y[Jogger0]
> 
> as appropriate.
> 
> This seems to produce Postscript output like this:-
> 
>       %%Page: 1 1
>       %%BeginPageSetup
>       BP
>       %%EndPageSetup
>       1.05 34.8 EBEGIN
>       %%BeginFeature: *Jog
>       << /Jog 3 >> setpagedevice
>       %%EndFeature
>       EEND
> 
> The print bureau tell me that when they print this document, although it jogs 
> correctly, each line on the page with "jog" commands embedded comes out 
> reversed. (i.e. text printed right to left - and in the wrong orientation - 
> this was a landscape A4 document.)

Here's the definition of BP in the groff's prologue.ps:

      /BP {
        /level0 save def
        1 setlinecap
        1 setlinejoin
        DEFS /BPhook known { DEFS begin BPhook end } if
        72 RES div dup scale
        LS {
          90 rotate
        } {
          0 PL translate
        } ifelse
        1 -1 scale
      } bind def

Note the final `1 -1 scale'.  Since I'm not a PS expert I can't tell
you where the problem is.  It looks like a bug in the print bureau's
PS implementation, but I can't tell you for sure.

As a workaround, I suggest that you use the `pstops' program (which is
part of the psutils package) to mirror the affected pages before
sending it to the printing shop.

  http://www.tardis.ed.ac.uk/~ajcd/psutils/index.html


    Werner