Ivan, On Saturday, November 22, 2014, Ivan Vučica <[email protected]> wrote:
> All of what David said -- and it gets more fun as, under OS X, some > (most?) layers may actually get sent over to WindowServer for rendering. > > I remember running into that factoid somewhere while researching CA, but I > didn't bother confirming. So take that with a grain of salt. > > Also, to add, as far as I understand, NSViews don't have a CALayer unless > they have wantsLayer set, or are children of a view that wantsLayer. But I > would not be surprised to find out that, if a view is animated in a way > that would make having CALayer simplify things, the view suddenly gets a > CALayer no matter if the app has set wantsLayer to YES or not. > > sent from phone So does it make sense for us to change our rendering model so that it incorporates CoreAnimation? > > On Sat, Nov 22, 2014, 18:40 David Chisnall <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> On 22 Nov 2014, at 00:37, Ivan Vučica <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >> >> > I'd guess that under OS X this is done with Core Animation, as many >> animations don't stop even if the UI thread is blocked. But -- we don't >> have that, so ... >> >> CoreAnimation is part of the story, multithreaded rendering is another. >> On OS X, each view (or, at least, most views) have a CA layer attached and >> so can independently render into that layer. A renderer thread can >> composite the result. Views marked as not supporting threaded drawing are >> all rendered in the same thread (typically because they P > > > interact with controllers that are not thread-safe), but this isn't >> necessarily the same thread as the thread that composites all of the >> results together. >> >> We can't do that with the current drawing model in GNUstep, because every >> view renders directly into the target window. >> >> David >> >> -- Sent from my STANTEC-ZEBRA >> >> Greg -- Gregory Casamento Open Logic Corporation, Principal Consultant (240)274-9630 (Cell) http://www.gnustep.org http://heronsperch.blogspot.com
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