Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site harvard.ARPA
Path: utzoo!linus!gatech!seismo!harvard!greg
From: greg@harvard.ARPA (Greg)
Newsgroups: net.graphics
Subject: Re: XOR cursors
Message-ID: <504@harvard.ARPA>
Date: Fri, 15-Nov-85 17:30:17 EST
Article-I.D.: harvard.504
Posted: Fri Nov 15 17:30:17 1985
Date-Received: Sat, 16-Nov-85 07:27:23 EST
References: <1858@saber.UUCP>
Reply-To: greg@harvard.UUCP (Greg)
Distribution: net
Organization: Harvard
Lines: 21

In article <1858@saber.UUCP> skinner@saber.UUCP (Robert Skinner) writes:
>The company is CADTRAK of Sunnyvale, CA....
...
>Here is a brief list of the items covered under patent #4197590, granted
>in 1980, and an addendum #31200, granted in 1983.  The descriptions
>given to me was terse, I'll expand a little on some that may not be
>obvious.  
>
>*  Use of hardware to XOR cursors non-destructively
>*  Hardware for generation of the shape and location of a cursor.
>*  Hardware image zoom by pixel replication 
>*  Pixel replication zoom by a scale factor
>*  Hardware for smooth panning (for apparent animation)
>*  Hardware grid patterns mixed with the video
...

These jokers might as well have patented the wheel.  XOR'ing a cursor is
neither a crime nor an innovation.  Nor is panning-by-hardware, for that
matter...
-- 
gregregreg