[ddraw] asynchronous screen updates

[Ove Kaaven]

ons, 04.02.2004 kl. 23.31 skrev Lionel Ulmer:
> > Then I would be drawing rectangles which are not ready for a redraw yet. Does 
> > UnLock release only last lock or all locks on these old DX versions?
> 
> Well, you need to store the rectangle at Lock time but only draw it at
> Unlock time. And I have no idea if any game ever does concurrent locks (so I
> have no idea how concurrent lock work).

If you want to see concurrent locks, grab Command & Conquer Tiberian
Sun. It doesn't use those old APIs you're talking about, but if you
wanted to know...