From: Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: GRX VESA driver
Organization: Pin Eight Software  http://pineight.8m.com/
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NNTP-Posting-Date: Wed, 17 Jan 2001 04:17:29 GMT
Distribution: world
Date: Wed, 17 Jan 2001 04:17:32 GMT
To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

On Mon, 15 Jan 2001 11:06:01 +0100, Waldemar Schultz
<schultz AT ma DOT tum DOT de> wrote:

>Hans-Bernhard Broeker schrieb:
>> 
>> That's not a bug in GRX, it's a bug in your graphics card's VESA
>> implementation and/or Windows driver. Sadly, this bug is so common in
>> today's cards that it's easy to forget that any card's drivers indeed
>> do get it right.
>> 
>> If GRX is to blame for anything, then for not using a workaround for
>> that common bug.
>most probably you are right, as I could not reproduce the behaviour
>om my old home computer with W95. But I still wonder how Allegro
>programmers did it to get around.

Surprisingly, the workaround is palette animation.  If I were to
encounter such a problem in my Allegro applications, I'd just
set_palette() once a second.  (I don't use GRX; consult the GRX docs
for an equivalent function.)