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From: mrh@Shasta.UUCP
Newsgroups: comp.sys.mac
Subject: Re: Laserwriter, PostScript, and Patterns
Message-ID: <1436@Shasta.STANFORD.EDU>
Date: Wed, 25-Mar-87 12:12:23 EST
Article-I.D.: Shasta.1436
Posted: Wed Mar 25 12:12:23 1987
Date-Received: Fri, 27-Mar-87 05:18:49 EST
References: <2302@cec2.UUCP> <345@gssc.UUCP> <465@batcomputer.tn.cornell.edu>
Organization: Stanford University
Lines: 23
Summary: device independence

In article <465@batcomputer.tn.cornell.edu>, eric@batcomputer.tn.cornell.edu (Eric Fielding) writes:
> In article <345@gssc.UUCP> jdm@gssc.UUCP (John D. Miller) writes:
> >From my dealings with PostScript, I have not found any indication of the
> >ability to fill with a pattern, which is a real shame.  "Color" fills only,
> >which means you can greyscale.

> I don't know what the mac does to download it's patterns, but one of 
> us has written a PostScript driver that creates its own pattern fills.
> One has to figure out the bit map for the pattern and send it to PostScript
> in hex.  To get a fine-scale pattern you need a lot of bits, coarser
> patterns (fewer bits) can be enlarged but look cruder.
> 					++Eric Fielding
 
   It seems to me that this violates the idea of device independence with 
postscript. The bitmap of the pattern you download would be different sizes
depending on what your printer resolution is. There may be no practical way
around this but I just wanted to point that out.
David Gelphman                  BITNET address: DAVEG@SLACVM
Bin #88 SLAC                    ARPANET address:  DAVEG@SLACVM.BITNET
Stanford, Calif. 94305          UUCP address: ...psuvax1!daveg%slacvm.bitnet
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