Re: CALayers - printing and flippedness
Re: CALayers - printing and flippedness
- Subject: Re: CALayers - printing and flippedness
- From: Gideon King <email@hidden>
- Date: Wed, 15 Sep 2010 08:15:25 +1000
Absolutely brilliant, thanks Kyle - downloading it now...
Gideon
On 15/09/2010, at 4:08 AM, Kyle Sluder wrote:
> On Tue, Sep 14, 2010 at 10:12 AM, Gideon King <email@hidden> wrote:
>> I have done some performance testing and it appears that I'll need to go the route of pure layers for most of it (the animation got a bit jerky with 1,000 layer backed views), but I guess I'll be able to factor out the drawing code and then when I want to print, just create an offscreen view and draw into it and print it. A bit more work, but probably worth it in order to access the power of Core Animation.
>
> We have an addition to Core Animation that mimics the Core Animation
> rendering process, walking the layer tree and setting up the correct
> CTM so that the same code can be used to render into both the layer's
> context or a PDF context for printing. We obviously don't support a
> lot of the stuff that Core Animation does, but we support enough to
> get a reasonable facsimile that doesn't involve creating a 300-dpi
> bitmap using CARenderer.
>
> The relevant method is -[CALayer(OQExtensions)
> renderInContextIgnoringHiddenIgnoringCache:useAnimatedValues:] and is
> found in our public OmniQuartz framework on github:
> http://github.com/omnigroup/OmniGroup/blob/master/Frameworks/OmniQuartz/CALayer-OQExtensions.m#L489
>
> --Kyle Sluder
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