Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!mstar!mstar.morningstar.com!bob From: bob@MorningStar.Com (Bob Sutterfield) Newsgroups: comp.lang.postscript Subject: Re: PostScript page reverser? Message-ID: Date: 1 Nov 90 18:23:18 GMT References: <4772@optilink.UUCP> Sender: usenet@MorningStar.COM (USENET Administrator) Reply-To: bob@MorningStar.Com (Bob Sutterfield) Organization: Morning Star Technologies Lines: 21 In-Reply-To: cramer@optilink.UUCP's message of 31 Oct 90 22:56:24 GMT 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.