From:	Allens <allen DOT asjp AT cableol DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro and blitting to screen
Date:	Sun, 19 Jul 1998 18:17:45 +0100
Organization:	Cable Online
Lines:	27
Message-ID:	<35B22A39.2BA7@cableol.co.uk>
References:	<6onnuh$12p$2 AT oravannahka DOT Helsinki DOT FI> <MPG DOT 101ad9bbc1569c84989988 AT news DOT virgin DOT net>
NNTP-Posting-Host:	194.168.181.53
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Andrew R. Gillett wrote:
> 
> In comp.os.msdos.djgpp, article <6onnuh$12p$2 AT oravannahka DOT Helsinki DOT FI>,
> Tuomo A Turunen (tuturune AT cc DOT helsinki DOT fi) wrote:
> > HELP !!??
> > I'm programming a very nice game with DJGPP and allegro. I use SVGA
> > 640*480*256 colors, so graphic looks good. But the problem is the
> > double buffering. It's just too slow.
> 
> I've never understood the point of double-buffering. Are there any
> advantages over page flipping?
> 
> I've only once used double-buffering myself, but I thought it was only
> suitable for small screen sizes like 320x200. Blitting an entire 640x480
> screen is guaranteed to be slow. Use page flipping and it will run much
> faster.
> 
> --
> Andrew Gillett
> http://argnet.fatal-design.com/
> ICQ: 12142937

The advantage of double buffering is that a lot of people don't have 
enough video memory for page flipping, especially with big reseloutions 
like 800x600x24, or 1024x768x16.

		Peter Allen

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