From: "Edmund Horner" <ejrh AT paradise DOT net DOT nz>
Newsgroups: comp.os.msdos.djgpp
References: <Pine DOT LNX DOT 4 DOT 05 DOT 10010200745020 DOT 3194-100000 AT mapef DOT pefri DOT hr>
Subject: Re: Allegro question
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Date: Fri, 20 Oct 2000 22:33:03 +1300
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

> 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.