Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!ut-emx!ccwf.cc.utexas.edu
From: ifar355@ccwf.cc.utexas.edu (David H. Huang)
Newsgroups: comp.sys.apple2
Subject: Re: More extended graphics on the IIgs
Message-ID: <43116@ut-emx.uucp>
Date: 25 Jan 91 01:35:05 GMT
References: <1991Jan21.235524.1@gacvx1.gac.edu> <14955@smoke.brl.mil>
Sender: news@ut-emx.uucp
Reply-To: ifar355@ccwf.cc.utexas.edu (David H. Huang)
Organization: The University of Texas at Austin
Lines: 22

In article <14955@smoke.brl.mil> gwyn@smoke.brl.mil (Doug Gwyn) writes:
>In article <1991Jan21.235524.1@gacvx1.gac.edu> youngdahl@gacvx1.gac.edu writes:
>
>I don't quite understand why you ask this.  The 3200-color demos manage to
>keep the SCBs updated (barely) faster than the scanning rate.  "Flicker"
>as you call it (usually called "tearing") would occur only if you couldn't
>update the SCBs fast enough.  Obviously if you set up a backing array for
>the SCB data, it could be rolled into the actual SCBs at a sufficient rate
>to keep up with display scanning.

But, 3200 color pictures are switching the same palettes in for a certain
scan-line. What he was asking was having two different palettes on a scan
line so they would blend into an intermediate color.

The flicker is slightly worse than an Amiga in interlace mode, but it might
not be as noticable if the colors that you are blending are close to each
other (in color)
-- 
David Huang                                 |
Internet: ifar355@ccwf.cc.utexas.edu        |     "My ganglion is stuck in
UUCP: ...!ut-emx!ccwf.cc.utexas.edu!ifar355 |      a piece of chewing gum!"
America Online: DrWho29                     |