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From: herbw@midas.TEK.COM (Herb Weiner)
Newsgroups: comp.laser-printers
Subject: Re: Adobe PostScript with Color??
Message-ID: <1996@midas.TEK.COM>
Date: Mon, 5-Oct-87 15:16:09 EDT
Article-I.D.: midas.1996
Posted: Mon Oct  5 15:16:09 1987
Date-Received: Sat, 10-Oct-87 06:27:01 EDT
References: <172@tahoma.ARPA> <8710022114.AA18492@brillig.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: mimsy!uunet!wyse!weitek!sci!sono!midas!herbw@brillig.umd.edu (Herb Weiner)
Distribution: world
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 22
Keywords: PostScript, color, Adobe
Approved: laser-lovers@brillig.umd.edu
Summary: The PostScript Language does *not* fully support color

--------

In article <8710022114.AA18492@brillig.umd.edu> zwicky@tut.cis.ohio-state.EDU (Elizabeth Zwicky) writes:
> In article <172@tahoma.ARPA> bakken@tahoma.ARPA (Dave Bakken) writes:
> >Is Adobe modifying the Postscript standard to include color?
> The PostScript standard has always included color. The primitives
> sethsbcolor, currenthsbcolor, setrgbcolor, and currentrgbcolor are
> original to PostScript, not added by NeWS. They aren't of much use
> on a LaserWriter, but they're there. The only addition made by NeWS
> was to make color objects.
>         Elizabeth Zwicky

The above is only *partially* true.  sethsbcolor, currenthsbcolor, setrgbcolor,
and currentrgbcolor are the color equivalents of setgray and currentgray.  What
is missing from the PostScript Language Specification are the color equivalents
of image, settransfer, currenttransfer, setscreen, and currentscreen.

If Adobe has extended the PostScript Language Specification to include new
primitives for handling color images, perhaps they could post this information
to the net.

                                 Herb Weiner (...!tektronix!midas!herbw)