On 02/05/2015 09:47 AM, Tapani Pälli wrote:
On 02/03/2015 10:07 PM, Chad Versace wrote:
It seems that two solutions are available:
S1. Provide waffle_set_swap_buffers_callback().
S2. On Waffle's NaCl backend, implement waffle_swap_buffers() to
block
until the back buffer has been composited onto the web page.
(I believe
this is possible to implement without a worker thread).
I guess it is possible but not without introducing extra
latency/slowness for the application thread which I was trying to
avoid. Ideally app could continue doing something else while swap goes
on.
Having experimented this for some time with this I don't think this is
possible to implement. Problem is that I can't wait in the main thread
for the callback to be called (blocking somewhere within
waffle_swap_buffers), the event dispatcher never gets run and there is
no API to 'flush event queue' or 'run single iteration of event
dispatcher'. There is way to get pp::MessageLoop of the main thread but
you can just post more work to it. I vote for the thread, I don't find
problems with it :)
// Tapani
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