Re: iOS: antialiasing text
Re: iOS: antialiasing text
- Subject: Re: iOS: antialiasing text
- From: David Duncan <email@hidden>
- Date: Fri, 10 Jun 2011 09:25:42 -0700
On Jun 9, 2011, at 7:10 PM, Graham Cox wrote:
> On further investigation, it seems as if the problem is not in the rendering of the text into the offscreen bitmap context, but the later scaling down of that image in a CALayer.
>
> On the Mac, when I set the layer's minificationFilter property to trilinear, that produces nice results, but on iOS, this filter *seems* not to be implemented, which may make sense. Is there a supported way to get smooth downsampling on iOS? If not I may be able to create the image such that no downsampling is needed, but that will be a lot more complicated than letting the layer handle it, so if possible, I want to avoid that.
This is a possibility, although to some degree this is likely due to differences in the GPU (that is, I would expect that Core Animation is still setting the proper flags, but the mobile GPU doesn't do as nice a job as the one on your desktop machine).
It may make more sense to take this from a different angle, for example why do you need a bitmap context in the first place and why does it need to be larger? There may be better ways of handling this case.
--
David Duncan
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