[haiku-appserver] Re: 2D engine
- From: Stefano Ceccherini <burton666@xxxxxxxxxxx>
- To: haiku-appserver@xxxxxxxxxxxxx
- Date: 27 Oct 2004 11:13:58 -0000
I'm not Rudolf but I hope you'll pardon me if I reply :)
> What is/means engine synchronization?
My take is that it's a means to lock the driver/hardware, to be able to
serialize the access to it. It's like any other form of locking, just that it's
the driver/accelerant which implements it.
That way you don't have to implement your own locking in the displaydriver
class, you just call acquire_engine_global() before calling any accelerant
function, then release_engine_global() when you're finished.
Look at the blit() function here:
http://cvs.sourceforge.net/viewcvs.py/open-beos/current/src/kits/game/WindowScreen.cpp?rev=1.6&view=markup
for an example.
Stefano Ceccherini aka Jack Burton
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