From: "Johan Venter" <jventer AT writeme DOT com>
Newsgroups: comp.os.msdos.djgpp
References: <Pine DOT SUN DOT 3 DOT 91 DOT 991021170208 DOT 4001C-100000 AT is> <380EF520 DOT C2FAE759 AT connect DOT ab DOT ca> <HFWP3.1237$we DOT 1842 AT newsfeeds DOT bigpond DOT com> <3811084C DOT 7874BA49 AT connect DOT ab DOT ca>
Subject: Re: Plague of the slow 'blit' routine :)
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Date: Sun, 24 Oct 1999 14:40:55 +1000
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Tom Fjellstrom <tomcf AT connect DOT ab DOT ca> wrote in message
news:3811084C DOT 7874BA49 AT connect DOT ab DOT ca...
>
>     if ((dest->dat >= screen->dat) && (dest->dat <= endofvideomem)) {
>         /* DO A FAR POINTER BLIT TO SCREEN */
>     } else {  /* memcpy */  }
>
> If I'm wrong then let me know, and if I'm not then I should have thought of
this
> sooner.

That looks like the way to do it. Calculate end of video memory as
width*height*bpp+base (although I'm sure you've already figured that out).

--
Johan Venter
ICQ 3643877 - jventer AT writeme DOT com
The TPU DJGPP Interest Group - http://surf.to/djgppig
The RSXNTDJ 1.5 HOWTO - http://surf.to/rsxntdj