Screen gamma and PNG files

[Richard Gaskin]

Chipp Walters wrote:
> I've a stack called Screen Gamma at:
> http://www.altuit.com/webs/altuit2/runrev/tutorials.htm
> 
> It's a collection of some studies I did awhile ago on this very subject. 

Great work on that gamma stack, Chipp.

Oddly enough though, I keep my Mac at PC gamma (2.2) but the engine 
reports my screengamma as "1.7" -- any clue as to why the engine would 
differ from what my OS X Display settings tell me?

And for those of us who might see the gamma difference as yet another 
substantiation for the old light bulb joke*, why is the Mac gamma 
different from all other OSes?


* Q: How many Apple employees does it take to change a lightbulb?

   A: Three:  one engineer to build a better but slightly
      non-standard light bulb, a second engineer to build a
      better but slightly non-standard socket for it, and
      a marketing exec to kill the program when it fails to
      meet sales projections.

--
  Richard Gaskin
  Fourth World Media Corporation
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  Rev tools and more: http://www.fourthworld.com/rev