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From: mxmora@unix.SRI.COM (Matt Mora)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Need XCMD to dim screen (like a screen saver)
Message-ID: <23854@unix.SRI.COM>
Date: 2 May 91 20:11:53 GMT
References: <3848@ux.acs.umn.edu>
Reply-To: mxmora@unix.sri.com (Matt Mora)
Organization: SRI International, Menlo Park, CA
Lines: 29

In article <3848@ux.acs.umn.edu> hughes@ux.acs.umn.edu (Steve Hughes) writes:


>Can this be done? I think so, screen savers do it all the time. 
>I've got AfterDark set to the "Face Away" module with 0 second dim 
>time and 0% intensity. "Blip!" screen off. "Blip!" screen on. 
>Pictures (and, of course, everything else) appear and disappear 
>INSTANTLY. just like I want them to. Different settings make it 
>fade slower or to a less dark final brightness. So it looks like I 
>CAN turn the screen off and on, instantly and with out flicker.

Hmmm. I think the dimming is done with gamma color tables
 (or whatever they are called) and will only work on
color machines. I guess that is not a problem for you 
since you are trying to display grayscale pictures. I seem to
recall someone mentioning that the gamma stuff is a bitch. I look it
up and let you know my findings.

matt





-- 
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Matthew Mora                |   my Mac  Matt_Mora@sri.com
SRI International           |  my unix  mxmora@unix.sri.com
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