Question about CoreImage and CISampler
Question about CoreImage and CISampler
- Subject: Question about CoreImage and CISampler
- From: Jaonary Rabarisoa <email@hidden>
- Date: Fri, 30 Dec 2005 22:52:00 +0100
Hi all,
I have some question about CoreImage usage and I hope it is the best
place to do that. I'd like to understand more how CoreImage works
inside. More precisely, How the class CISampler works. The
documentation, I think, gives all the necessary to use correctly this
class but I'd like to do something less usual: find a way to
retreive the value of the AffineMatrix associate with a CISampler
object.
To construct an instance of CISampler one can specify the affine
matrix by using the key 'kCISamplerAffineMatrix'. Now given an
instance of CISampler, how can we retreive the affine matrix ? I
tried something like this, but it doesn't work :
CISampler *my_sampler = ... ;
NSArray *affine_matrix = [my_sampler
valueForKey:kCISamplerAffineMatrix];
Thank you for your help.
Cheers,
Jaonary
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