From: Treepy <gvidas2 AT mapef DOT pefri DOT hr>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Allegro question
Date: Mon, 23 Oct 2000 11:23:16 +0200
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One more quest,
is it possible that system bitmaps to all computers are linear, and can be
accessed by not using memory banked mode

On Fri, 20 Oct 2000, Edmund Horner wrote:

> > Can someone explain me what does is_linear instruction mean
> 
> I assume you mean, is_linear_bitmap().
> 
> The is_linear_bitmap() function is used to test whether a BITMAP is linear,
> i.e. that it's image data is stored in the "obvious" way (you can access
> pixels simply by their (x+y*width) offset).  Memory bitmaps and Mode 13
> screen bitmaps are linear.
> 
> I can't imagine you'd be interested in this function without already knowing
> about it, so I am a little curious as to why you're asking.  Why don't you
> refer to the Allegro documentation for some real information?
> 
> Edmund.
> 
> 
> 
>