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From:	eheft AT sisko DOT dnaco DOT net (Eric Heft)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Q: Virtual Screens/Pages.
Date:	22 Dec 1995 01:17:31 GMT
Organization:	The Dayton Network Access Company (DNACo)
Lines:	17
Message-ID:	<4bd0vb$pjo@sisko.dnaco.net>
NNTP-Posting-Host:	eheft AT kirk DOT dnaco DOT net
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi I'd like to smooth out a "mapping" program. Currently 
I've got a list of data items that range in x and y from 
0 - 2000. To draw the map I calculate the min, max x&y that
will currently fit, Then loop though the data items looking
for hits. 

What I'd like to do is draw the 'update' on a virtual screen 
and when finished move the update to the screen. So far I'm
using the grx / grx2.0 library to do the grx and haven't seen
anything that fits the bill.

Anyone have any points to libs/examples that can write stuff to
virtual pages. I'd like to run 640x480 by 256 colors. 

Thanks in advance. Eric

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