TWINE: Game is slow when VSYNC is ON

[vanfanel]

Hi,

With the VSYNC option ON, the TWINE engine runs slowly because the game is doing internal video waits AND there's the VSYNC wait.

So, with VSYNC ON, the internal video refresh waits of the TWINE engine should be disabled, so game syncs with the VSYNC frequency instead.

Thanks!

[mgerhardy]

Weird - vsync should block the g_system->updateScreen() call. And in that case the delayMillis(x) call should take that into account.

[mgerhardy]

There is also this issue: https://bugs.scummvm.org/ticket/12843 - maybe it's more the renderer, and not vsync?

[mgerhardy]

The issue should be fixed in master and branch-2-5-0. I've compared the game speed with a few youtube videos - I'm still not 100% sure about the speed. But the code implies that the game was running the main loop at 66hz - with a weird sleep of 2ms at each loop. I've tried to do the same and hope this feels better now.