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Article #1545Re: xlib04 & scrolling
From: Kludge
Date: Thu, 24 Dec 1992 01:00
Date: Thu, 24 Dec 1992 01:00
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1179 bytes
In article <1h8k64INN271@ub.d.umn.edu> cbusch@ub.d.umn.edu (Chris) writes: > > Is "real" scrolling available thru xlib04 graphics library. My >question boils down to this: is there 4 different VRAM move routines, >one for each direction? Instead of just a showpage(int) routine that >respositions the virtual screen. > >-cbusch@ub.d.umn.edu No - it's not necessary. There's a couple of routines that can do what you want: x_cp_vid_rect() and x_shift_rect(). Use the second one for scrolling, since it won't overwrite what it hasn't written yet. NOTE: It will *not* do smooth x-coord. scrolling - the x coordinates you give it are rounded to the nearest 4 pixels. --Kludge
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Newsgroups: rec.games.programmer Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!destroyer!cs.ubc.ca!uw-beaver!news.u.washington.edu!hardy.u.washington.edu!kludge From: kludge@hardy.u.washington.edu (Kludge) Subject: Re: xlib04 & scrolling Message-ID: <1992Dec24.010024.2497@u.washington.edu> Sender: news@u.washington.edu (USENET News System) Organization: University of Washington, Seattle References: <1h8k64INN271@ub.d.umn.edu> Date: Thu, 24 Dec 1992 01:00:24 GMT Lines: 17