On 25 Aug 2008, at 21:51, Seth Willits wrote:
On Aug 25, 2008, at 1:33 PM, Ricky Sharp wrote:There isn't a particularly fast way to do this, although I have experimented with it a bit in the past. You can use the CGWindow API to read the contents under your window and apply a blur to them using Core Image directly or indirectly via Core Animation, but in either case you'll see the Window Server spending considerably more CPU time as it has to re-render the contents under your window. You could fake it by updating the image rarely but there isn't a particularly good way to completely mitigate the CPU usage.Hmm... it's very hard to tell, but I believe there must be a fast way that already exists.I'm sure he meant a fast *public* way to do it. Using the private APIs / the method that Rob showed is perfectly fast.
I'd really like this made easier too, so I filed an enhancement request rdar://6174287
Jonathan http://espresso-served-here.com
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