🚀 go-pugleaf

In article <4772@optilink.UUCP> cramer@optilink.UUCP (Clayton Cramer) writes:
   Unless you are capable of interpreting PostScript, you can't write
   a PostScript page reverse which is generally useful -- you end up
   building one for a particular application.

If the PS document is conformant enough with Appendix C of the Red
Book, then it is page-reversible.  If an application produces a PS
program that is so non-conformant as not to be page-reversible, then
that application can be considered broken.

   Building one for a particular application is enough work that no
   one does it for free -- and no one is going to build a program that
   works for any arbitrary PostScript program and give it away.

I have been generously provided with several PS page reversers (thanks
to all for the pointers!) that work with conformant documents.  If an
application produces non-conformant PS documents, then its author has
the choice of either fixing the application or writing a custom
reverser and all the other necessary PS handling tools.  If the author
fixes the application, then {s}he won't have to write a custom
reverser and decide whether to give it away.