Rev + PNG Display on OS X 10.6

[Thomas McGrath III]

Good catch Scott. I have been reading through the snow leopard changes  
and have not come across this yet. Am looking for it now.

Thanks

Tom McGrath III
Lazy River Software
3mcgrath at comcast.net

iTunes Library Suite - libITS
Information and download can be found on this page:
http://www.lazyriversoftware.com/RevOne.html






On Jan 14, 2010, at 1:27 PM, Scott Rossi wrote:

> This might be useful for folks delivering image-heavy apps on Mac OS  
> X 10.6
> and later...
>
> Apparently with Snow Leopard, Apple has changed the default gamma of  
> the
> system to 2.2 (used to be 1.8).
>
> <http://blogs.adobe.com/jnack/2009/09/why_your_web_content_will_look_darker 
> .
> html>
>
> I was recently throwing some PNG images on a card on Rev that looked
> significantly darker than where they were created (in Photoshop),  
> and for
> the life of me could not figure out why.  I'm still searching for a  
> reliable
> way to strip the gamma information from PNG images, but after  
> finding the
> above article, I tried changing the screenGamma in Rev to 2.2 and  
> amazingly
> (or maybe expectedly) the image seems to display properly.
>
> set the screenGamma to 2.2
>
> I need to do some more testing, but it appears that when delivering  
> apps on
> Snow Leopard that make heavy use of PNGs, one will need to do  
> something to
> the effect of:
>
> if "mac" is in platform() and systemVersion() > 10.5 then ...
>
> Also used the following method to force refresh the display of the  
> image:
>
> set text of img 1 to text of img 1
>
> Hope this saves some head banging for other folks using images.
>
> Regards,
>
> Scott Rossi
> Creative Director
> Tactile Media, UX Design
>
>
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