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From: blanford@spf.trw.com (Ronald P. Blanford)
Newsgroups: comp.sys.next
Subject: Re: How do you draw lines into the current view for Rubberbanding
Message-ID: <28467CDF.5148@deneva.sdd.trw.com>
Date: 31 May 91 16:42:06 GMT
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In article <4043@ssc-bee.ssc-vax.UUCP> dmg@ssc-vax (David M Geary) writes:
>   If all you want to do is rubber-banding without the flicker, 
> why allocate an off-screen buffer for the *entire* window?  
> Instead, why not allocate 4 buffers,each of which is one pixel 
> wide by screen width (or height) long:

I didn't want to jump in earlier since I didn't do the work and am not
familiar with the code, but one of our applications implements a Rubberband
class using just this technique.  Besides reducing flicker, it improved
performance by an order of magnitude.