From: aho450s AT nic DOT smsu DOT edu (Tony O'Bryan)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Quick question re: Allegro BITMAPs
Date: Thu, 22 May 1997 08:55:50 GMT
Organization: Southwest Missouri State University
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On Thu, 22 May 1997 08:44:33 GMT, aho450s AT nic DOT smsu DOT edu (Tony O'Bryan) wrote:

>You are correct that "void *dat" is the key.  Assuming  unsigned char *Buffer:
>
>Buffer = (unsigned char *)MyBitmap -> dat;

I should also point out that the bitmap structure contains pointers to the
beginning of each bitmap line.  You could use the Y coordinate as an index into
BITMAP -> line[Y], and use the X coordinate as the offset from the start of that
line.