From:	Darren Johns <djohns AT csd DOT abdn DOT ac DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: scrolling with allegro
Date:	02 Jul 1998 16:58:51 +0100
Organization:	University of Aberdeen, Scotland
Message-ID:	<o2k95wmeh0.fsf@csd.abdn.ac.uk>
References:	<001a01bda51b$07837e40$624d08c3 AT arthur>
NNTP-Posting-Host:	trogon.csd.abdn.ac.uk
Lines:	23
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>>> One scheme is to create a very large bitmap object that is your level,
>>> and then blit the appropriate piece onto the screen.
>>> --
>>
>>Well that is not memory efficient, but the easiest approach.
>
>
>Not memory efficient. Hmm. Let me see: for a 1600x1600 map (for instance) in
>256 colours - that's 625Mb of ram. (!)

Hmm. interesting maths, I make 1600*1600*1 = 2.44Mb. 
You seem to have 1600*1600*256 = 625Mb, thats a colour 
depth of 2^2048 (2 to the power 2048), that's an 
awfully high number of colours! (I make 2^256 > 1.15*10^77).
Of course if you meant 625M_bits_ of RAM I'll shut up, 
otherwise you were out by two orders of magnitude.

/Mark.
-- 
| To take no action is in itself taking an action, and to have no opinion is |
|/-\| to have an opinion, so are we helpless in what goes on around us?? |/-\|
|\-/|\-/|\-/|\-  D Mark Johns.   mailto:djohns AT csd DOT abdn DOT ac DOT uk  -/|\-/|\-/|\-/|
|_____________________ http://www.csd.abdn.ac.uk/~djohns ____________________|

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