Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!decwrl!labrea!polya!kaufman
From: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Color Printing with Color QuickDraw
Message-ID: <4427@polya.Stanford.EDU>
Date: 13 Oct 88 00:18:50 GMT
References: <6610@ut-emx.UUCP> <1234600013@uxf.cso.uiuc.edu> <105@internal.Apple.COM>
Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Organization: Stanford University
Lines: 24

In article <105@internal.Apple.COM> casseres@Apple.COM (David Casseres) writes:
>In article <1234600013@uxf.cso.uiuc.edu> emb1354@uxf.cso.uiuc.edu writes:

->...  After opening a printer GrafPort, which BTW was a
->real CGrafPort, and trying to use palettes, all I could get was black.

>Unless I am misreading this, there is still some confusion about printer
>grafPorts.  The port is ALWAYS opened by the printer driver, and all
>current Apple printer drivers initialize it to a black/white grafPort, not
>a CGrafport.  This is true even if you pass in a pointer to a port that
>you have allocated yourself...

>If you open a color grafport and pass its pointer in when you call PrOpenDoc,
>it just gets re-opened as a b/w grafPort (with current Apple drivers).

Of course, Dave, SOME drivers open CGrafPorts (but not Apple's... at least not
until Apple discovers color printing) ;-)

In particular, the Mirus FilmPrinter and Tektronix printer both open CGrafPorts
for their printing.  In this case, even if you attempt to give them B/W
GrafPorts, a Color port will be opened and returned.  In the Mirus case, at
least, there is every evidence that palettes work properly.

Marc Kaufman (kaufman@polya.stanford.edu)