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From: axel@coma.UUCP
Newsgroups: comp.text
Subject: Re: looking for dwb 2.0 source - (nf)
Message-ID: <11900003@coma.UUCP>
Date: Mon, 6-Jul-87 08:46:00 EDT
Article-I.D.: coma.11900003
Posted: Mon Jul  6 08:46:00 1987
Date-Received: Sat, 11-Jul-87 16:54:16 EDT
References: <35@blipyram.UUCP>
Lines: 21
Nf-ID: #R:blipyram:-3500:coma:11900003:000:1094
Nf-From: coma!axel    Jul  6 13:46:00 1987

I think it might be worth mentioning, that there exists a 'freeware'
di-troff postprocessor which produces PostScript output. It was
originally written by Stephen Frede, who now works for some australian
company. We use a customized version of his 'tpscript'-package. Our
customizations include some improvements concerning the generated
PostScript and an extended '\!'-interface. Namely, we added an
execution-directive, that allows to 'invoke' any UNIX(1) command and
insert it's (standard-)output into the stream of PostScript generated
by the postprocessor. This - of course - makes only sense with
unix-commands which produce PostScript on standard-out themselves. We 
use this feature with a program that converts GEM-Metafiles to PostScript.

The described approach is not limited to the Metafile-converter, but
can be applied to any PostScript-graphic for which bounding-box
information is obtainable. We have one single troff-macro that
interfaces very conveniently to this mechanism.

Axel Mahler, Tech.Univ. Berlin

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