On Jun 15, 2011, at 11:30 AM, Stephen Blinkhorn wrote: > 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.
CGContextSetAlpha(). -- David Duncan _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
