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From: | ludvig <ludvig AT club-internet DOT fr> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Allegro - PALLETE and BITMAP |
Date: | Mon, 15 Sep 1997 00:28:38 +0200 |
Organization: | Grolier Interactive Europe |
Lines: | 25 |
Message-ID: | <341C6515.34F7@club-internet.fr> |
References: | <QVfuBCAC0XC0EwLe AT mcoolie DOT demon DOT co DOT uk> |
Reply-To: | ludvig AT club-internet DOT fr |
NNTP-Posting-Host: | ppp-108-144.villette.club-internet.fr |
Mime-Version: | 1.0 |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Mike Coulson wrote: > > At the start of the Allegro example program number 18, the > following lines appear: > > PALLETE my_pallete; > BITMAP *scr_buffer; > > Can someone tell me why the BITMAP has to be a pointer to the buffer > scr_buffer, whereas my_pallete is not a pointer? > > Yes. > I am a beginner. > > Thanks, > -- > Mike Coulson I just guess that PALLETE is a struct with a special size(3*256bytes) where a ordinary bitmap might be as big or small as you wish(if you got enough memory ofcourse:) therefore a pointer is nessecary to the bitmap as it's size might be decided at runtime=compiler can't make room for something with the size "unknown". Ludvig
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