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Mail Archives: djgpp/1997/03/11/21:00:54

From: fighteer AT cs DOT com (John M. Aldrich)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Graphics Question (switching pages)
Date: Wed, 12 Mar 1997 04:07:26 GMT
Organization: Two pounds of chaos and a pinch of salt.
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Message-ID: <33262aba.6383932@news.alterdial.uu.net>
References: <Pine DOT LNX DOT 3 DOT 95 DOT 970310111804 DOT 29122A-100000 AT carhart DOT com>
Reply-To: fighteer AT cs DOT com
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

On Mon, 10 Mar 1997 11:20:11 -0800, Allan Carhart <allan AT carhart DOT com>
wrote:

> If you can give me any information, I'd really appreciate it.
> Specifically:
> 1) references where I can read about this in books or on the web

Try <http://www.rt66.com/~brennan/djgpp/>, and look at some of the
graphics references.

> 3) information about how to write to video memory

FAQ, chapter 10 (and also 17 and 18).

> 4) background on what's going on with setvisualpage() and
> setactivepage() (and why the don't seem to work with gcc?)

GRX 2.0 is still a beta graphics library, and has not been actively
supported for a long time (nearly a year now).  It may well have
problems in speed and/or low-level routines like page flipping, but I'm
the wrong person to ask.

> 5) success stories with DJGPP (gcc for DOS) graphics programming.

Took you long enough to get here.  :)  It seems that the vast majority
of DJGPP success stories come from folks who've used the Allegro
graphics/game programming library.  It's available from SimTel in the
'v2tk' directory, and has been shown to be a hundred percent faster and
more reliable than GRX.  The only problem is converting your code to a
different interface.

Don't get me wrong - there are also quite a few GRX success stories out
there, so I'm sure that somebody here will be able to help you.  :)

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