Re: drawing in a separate thread

FROM : Jens Alfke
DATE : Fri May 02 17:27:17 2008

On 2 May '08, at 4:20 AM, Jean-Daniel Dupas wrote:

> You can have a look at DistributedObject. I think you can publish a 
> drawer object in your drawing thread and then, just call draw fro 
> your main thread.


DO might be overkill for this scenario. The background thread really 
just needs to run a while() loop that waits on a condition-lock, then 
draws. The main thread's -drawRect: method just sets the condition on 
the lock to trigger the background thread.

If more information needs to be passed to the thread, you can use a 
producer/consumer queue, but unfortunately Foundation doesn't come 
with one of those built-in; there must be source code for one lying 
around, though.

—Jens