Re: Non-Sub-Pixel Rendering Font Rendering Differences when using Core Animation
Re: Non-Sub-Pixel Rendering Font Rendering Differences when using Core Animation
- Subject: Re: Non-Sub-Pixel Rendering Font Rendering Differences when using Core Animation
- From: Kyle Sluder <email@hidden>
- Date: Wed, 27 Apr 2011 10:11:16 -0700
- Delivered-to: email@hidden
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On Tue, Apr 26, 2011 at 9:45 PM, Simone Manganelli <email@hidden> wrote:
> I'm aware of the fact that Core Animation disables sub-pixel rendering for text when drawing to transparent backgrounds, so I've intentionally designed my CALayers so that they have opaque backgrounds. Sub-pixel rendering is definitely active now that I've drawn an opaque color to the layer. This doesn't seem to be the issue, especially because the Core Animation text appears *heavier* than the normal Quartz text, whereas it usually appears more wispy when sub-pixel rendering is off.
Subpixel AA will not be enabled unless you create your own
CGBitmapContext with
kCGImageAlphaPremultipliedFirst|kCGBitmapByteOrder32Host, draw your
layer contents into that, and set the resultant CGImage as the content
of your layer. http://lists.apple.com/archives/Cocoa-dev/2011/Jan/msg00149.html
--Kyle Sluder
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