From:	Mike Roosa <mroosa AT gate DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Allegro Help: Double Buffer
Date:	Mon, 02 Feb 1998 08:28:50 -0500
Organization:	CyberGate, Inc.
Lines:	14
Message-ID:	<34D5CA12.F4B6F2B4@gate.net>
NNTP-Posting-Host:	tpafl3-14.gate.net
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I'm new to DJGPP and Allegro, and I have a question on Double
Buffering.  I wrote a program to read in a sprite, draw to a buffer,
blit the buffer to the screen.  This is all enclosed in a loop that
moves the sprite based on which arrow key is pressed.  It works fine,
but I am having a problem.  If I increment the X or Y coordinate by 1
pixel everything moves smooth but takes a very long time.  If I
increment the X or Y coordinate by 8-10 pixels, it moves at a much
better speed but becomes kind of blurry.  I'm using the AUTODETECT (640
X 480).  Should I use Mode-X with page flipping or triple buffering?
Will this run on most of today's machines as long as it's run in a DOS
Window?

Please help.

- Raw text -