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Re: setWantsLayer: YES causing font render problem?

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Re: setWantsLayer: YES causing font render problem?

Subject: Re: setWantsLayer: YES causing font render problem?
From: Chris Ryland <email@hidden>
Date: Wed, 20 Feb 2008 10:21:38 -0500

Adhamh--

<http://earthlingsoft.net/ssp/blog/2007/11/subpixel_antialiasing_followup > is a very thorough investigation of this topic.

Bottom line is that CA text rendering doesn't do the fancy sub-pixel font antialiasing.

On Feb 20, 2008, at 10:00 AM, Adhamh Findlay wrote:

Hello,
I've started to use Core Animation for window/sheet resizing. I noticed that when I enabled setWantsLayer: YES in my awakeFromNib method that the font in my labels become pixelated. If I don't call setWantsLayer: the animations appear to still work correctly and the font goes back to normal.

While investigating this I found that the BasicCocoaAnimations sample project has the same problem because it calls setWantsLayer: YES in the main window controller's awakeFromNib method. (Which leads me to believe that I should call this method too.)
http://developer.apple.com/samplecode/BasicCocoaAnimations/index.html
Screen shots from BasicCococaAnimations.app
Zoomed in
<pastedGraphic.png>
Normal size
<pastedGraphic.png>
I've found CAEdgeAntialiasingMask, but that doesn't seem seem to be related to font antialiasing.
Is this an antialiasing issue?  Is there a way to correct it?
I'm running 10.5.2.
Thanks,
Adhamh
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Cheers!
--Chris Ryland / Em Software, Inc. / www.emsoftware.com

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References:  
  >setWantsLayer: YES causing font render problem? (From: Adhamh Findlay <email@hidden>)




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