Message-Id:	<199606102338.TAA01522@delorie.com>
Comments:	Authenticated sender is <lb8412 AT mailhost DOT dnet DOT co DOT uk>
From:	"Lee Braiden" <lee_b AT celestia DOT dnet DOT co DOT uk>
Organization:	Celestia
To:	djgpp AT delorie DOT com
Date:	Tue, 11 Jun 1996 00:35:08 +0
MIME-Version:	1.0
Subject:	Re: Allegro Compatibility
Reply-to:	lee_b AT celestia DOT dnet DOT co DOT uk

> On Fri, 7 Jun 1996, Lee Braiden wrote:
>
> I know people have used it successfully under win95 and OS/2. It crashes 
> spectacularly under win 3.1 (but then what doesn't? :-) and I have no idea 
> about NT...

Is there a list of config settings that OS/2 needs ?  I'd like to be 
able to give instructions (or an installation script) for different 
setups if poss.

> > What's the fastest graphics library available for DJGPP by the way ? 
> > (For raw speed, in games, etc.)
> It depends what you are doing. I would guess probably not libgrx (but 
> then it can do much more than the other libs). Allegro, JLib, and 
> XLib all have their good points and bad points...

Well, I'm using a basic (well, almost - SVGA, but 256K, and no 
blitter, etc) VGA card at the minute, although it's an Oak OTI-37C, 
so I've got the UniVBE program running, meaning I can forget 
supporting non-VBE cards if I have to, but how many cards are there 
that have bad or no VBE support still ?

Basically, I want to know that the graphics will be as fast as 
possible on a basic card like mine, and a top of the range VESA card  
(at least, as much as possible without separate drivers for every 
card).

There are a lot of details in the way though, like whether I 
should use Mode-X with two pages (under the assumption that the VRAM 
access on a good card will be fast enough), so that the card's 
blitter can blit straight into the hidden page, or whether to use the 
standard "chunky" (non-planar) mode, giving the processor all the work 
except the final transfer to the display.  I guess you can't use the 
blitter for system RAM to system RAM copies can you ?

Hope someone can help...
- Lee.

--
Lee Braiden  (lee_b AT celestia DOT dnet DOT co DOT uk)
<Celestia>

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