PixMap Device Drivers

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#493

From: Kobi O. Eshun
Date: Thu, 12 Nov 1992 01:18

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I have compiled ghostscript 2.5 on an HP9000/822 running HP/UX 7.0.  My
installation includes the "ppm" and "ppmraw" drivers, whose output I have
successfully piped into a formatting utility for a 24-bit color CIRRUS
laser plotter.  Two issues I could use help with:

1 - When rendering extremely large rastas (7Kx8K), the green component of
		the pixmap is "clipped" into the lower four of the eight bits.  The
		problem does not occur for smaller rastas (1Kx1K, for example), but
		I haven't determined empirically where the break point is.

		Any suggestions?

2 - Where are the "ppm" and "ppmraw" formats documented?  How do they
		differ from each other?


I can be reached as

				jkoes@chevron.com

Thanks,

Kobi.

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arc1-ca.pugleaf.net!sparky!uunet!convex!darwin.sura.net!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!lhdsy1.lahabra.CHevron.COM!jkoes

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Newsgroups: gnu.ghostscript.bug
Path: arc1-ca.pugleaf.net!sparky!uunet!convex!darwin.sura.net!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!lhdsy1.lahabra.CHevron.COM!jkoes
From: jkoes@lhdsy1.lahabra.CHevron.COM (Kobi O. Eshun)
Subject: PixMap Device Drivers
Message-ID: <8234@lhdsy1.lahabra.chevron.com>
Keywords: ppm, ppmraw, 24-bit-color
Sender: gnulists@ai.mit.edu
Organization: GNUs Not Usenet
Distribution: gnu
Date: Thu, 12 Nov 1992 01:18:28 GMT
Approved: bug-ghostscript@prep.ai.mit.edu
Lines: 24