FreeLists / haiku-appserver / [haiku-appserver] Re: 2D engine

[Stefano Ceccherini <burton666@xxxxxxxxxxx>]

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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