From:	Damian Yerrick <DONT DOT YOU DOT DAREd_yerrick AT hotmail DOT comSEND DOT SPAM>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: make a faster blit (allegro)
Organization:	Pin Eight Software http://pineight.8m.com/
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References:	<89r0b7$d37$1 AT wanadoo DOT fr>
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Date:	Mon, 06 Mar 2000 01:35:41 GMT
To:	djgpp AT delorie DOT com
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On Sat, 4 Mar 2000 13:39:19 -0000, "Cyberdivad"
<cyberdivad AT caramail DOT com> wrote:

>Hello,
>Allegro is a very good library for programming games, but in
>vga only, because blit is too slow for svga and hicolor.
>Has someone made a faster (but specific for svga) one ?

blit() is only as fast as your bus's bandwidth.
Hicolor (16 bit): multiply twice your screen width by screen height.
Divide this into your bus bandwidth to get maximum frames per second.

Or use a "dirty rectangle" approach: only blit what has changed from
frame to frame.

And there are faster versions:  try using a FreeBE/AF or SciTechSoft
Display Doctor driver; Allegro supports them.  If you are on an
accelerated system, keep your bitmaps in video memory.

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