On Jan 28, 2010, at 12:48 PM, vincent habchi wrote:
> Of course. But then, admitting I do indeed draw offscreen and then load
> contents in the CALayer, on what object shall I draw? A CGLayer? Something
> else?
There are only 2 types of context you can create (bitmap & pdf) and only one
that c
Le 28 janv. 2010 à 21:37, David Duncan a écrit :
> On Jan 28, 2010, at 12:29 PM, vincent habchi wrote:
>
>> You're right. Up to that point, I'm quite satisfied with generating the
>> contents directly out of the delegate, but, in a sense, your approach is
>> more unified, since the same layer c
On Jan 28, 2010, at 12:29 PM, vincent habchi wrote:
> You're right. Up to that point, I'm quite satisfied with generating the
> contents directly out of the delegate, but, in a sense, your approach is more
> unified, since the same layer could then display either vector (drawn out of
> the data
David,
> You can create the images on a secondary thread, then pass them back to the
> main thread for assignment. The heavy operation is the drawing, not the
> uploading of drawn content. You may also want to consider culling some of
> that data before you draw it.
You're right. Up to that po
On Jan 27, 2010, at 9:52 PM, vincent habchi wrote:
>> But at the same time, you could probably simplify this a lot by creating
>> CGImages with your content and then assign those images as the contents of
>> your layers from the main thread. This is almost certainly likely to be
>> simpler and
David,
Le 28 janv. 2010 à 00:09, David Duncan a écrit :
> Are you calling -drawLayer:inContext: yourself? if you are, don't do that -
> just call -setNeedsDisplay on the layer, it will do the right thing.
Yes, that exactly what I do: I have set up a custom loop event, that I trigger
each time
On Jan 27, 2010, at 7:27 AM, vincent habchi wrote:
> Let's say I have a ScrollLayer with 9 underlying tiles (CALayer). Each tile
> has a delegate to provide contents via DrawLayer:inContext:. At init time,
> these delegates create a linked object that spawns a thread that runs its run
> loop (I
David,
Le 25 janv. 2010 à 21:39, David Duncan a écrit :
> If you want to draw to a layer on a separate thread, you need to run the
> runloop on that thread, as Core Animation is pretty highly dependent on the
> run loop operating. If you call -setNeedsDisplay on a thread where you never
> run
David,
Le 25 janv. 2010 à 21:39, David Duncan a écrit :
> If you want to draw to a layer on a separate thread, you need to run the
> runloop on that thread, as Core Animation is pretty highly dependent on the
> run loop operating. If you call -setNeedsDisplay on a thread where you never
> run
On Jan 25, 2010, at 12:02 PM, vincent habchi wrote:
> the silly question is this: is it possible to redraw a CALayer in background?
>
> More specifically, I've written a delegate method drawLayer:inContext: that
> creates a thread that does the drawing then returns.
If you want to draw to a l
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