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Article #5866

PPD file omissions and strangeness

#5866
From: Pond Scum
Date: Thu, 31 Dec 1992 07:53
38 lines
2271 bytes
I'm working on a program which uses PPD files and to test it I grabbed
a bunch of PPDs off the Adobe file server.  I have run into some weird
things in PPD files and was wondering if anyone else had run into similar
problems and what you decided to do about them:

1) Why do the Lino PPDs for PostScript versions < 52.3 have entries
   for *SetResolution, but versions > 52.3 do not have entries for
   *SetResolution?  We have a RIP 30 with 52.3 and I'm pretty sure
   you can change the resolution if you do an exitserver first.

2) The entries under *ScreenProc seem pretty useless, especially if
   the device has a screen filter installed.  There is a special PPD for
   an AGFA SelectSet 5000 with the screen filter active, but RoundAGFASpot
   and EllipticalAGFASpot (or whatever they are called) not listed under
   ScreenProc.  It would be very useful if they were.

3) According to the PPD spec, the value following *MaxMediaWidth is an
   integer inside double quotes.  I got L3330523.PPD and L530_523.PPD
   off the Adobe file server and the numbers after *MaxMediaWidth were 
   not inside double quotes.

4) None of the PPDs for the Varityper imagesetters have a *CustomPageSize
   entry.  From looking at the file it seems you could use the setpage
   operator almost the same way as setpageparams on most other RIPs?
   I could swear that I used a Varityper imagesetter once and it supported
   the setpageparams operator.

5) One of the Varityper PPDs has the wrong invocations to set the
   resolution to 1270.  It actually tries to do "270 setresolution".
   Of course, there could be some really weird bug where you have to
   say "270" instead of "1270", but I doubt it.


Actually, if you've ever done anything at all with PPD files I'm interested
in hearing about it.

Jonathan Hue		hue@island.COM
Technical Details
Message-ID: <1992Dec31.075301.8845@island.COM>
Path: arc1-ca.pugleaf.net!sparky!uunet!island!hue

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Newsgroups: comp.lang.postscript,comp.periphs.printers
Path: arc1-ca.pugleaf.net!sparky!uunet!island!hue
From: hue@coney.island.COM (Pond Scum)
Subject: PPD file omissions and strangeness
Message-ID: <1992Dec31.075301.8845@island.COM>
Originator: hue@coney
Sender: usenet@island.COM (The Usenet mail target)
Organization: Island Graphics and Hot Tub Repair of Marin County
Date: Thu, 31 Dec 1992 07:53:01 GMT
Lines: 38