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From: thant@horus.sgi.com (Thant Tessman)
Newsgroups: comp.sys.sgi
Subject: Re: REDRAW question
Message-ID: <1628@odin.SGI.COM>
Date: 27 Nov 89 17:46:36 GMT
References: <21289@uflorida.cis.ufl.EDU>
Sender: news@odin.SGI.COM
Reply-To: thant@horus.sgi.com (Thant Tessman)
Distribution: usa
Organization: Silicon Graphics, Inc.
Lines: 20

In article <21289@uflorida.cis.ufl.EDU>, pff@beach.cis.ufl.edu (Pablo
Fernicola) writes:
> In a program that I am working on, whenever the window gets redrawn the
> ghosts of the previous border stays inside the window.
> 
> In that window I make use of writemask, but I thought that using it wouldn't
> have any effects on a clear() instruction.  Am I right?

'clear()' uses the current writemask.  Try:

	case REDRAW:
		tmp = getwritemask();
		writemask(0xfff)  /* or RGBwritemask(0xffffffff) */
		color(whatever); clear();
		writemask(tmp);
		...

Have fun,

thant