On 14 Jun 2011, at 16:07, Quincey Morris wrote:
On Jun 14, 2011, at 14:56, Stephen Blinkhorn wrote:
I'm looking to fill a large custom view with noise. The solution I
have arrived at so far is taking much too long to draw for it to be
useable. Does anyone know any better ways of achieving this in
Cocoa? The basic idea is to add an amount of noise to a base color
pixel by pixel, for example:
Have you looked into using Core Image, e.g. the CIRandomGenerator
filter composited onto an image filled with the base color?
I've got the random noise part working and it easily fast enough. Its
a shame there isn't a way to specify the opacity when drawing
CGLayers. I'd find that useful but I imagine there is a reason for it.
Stephen
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