Many thanks for the information Kimmo. At least I know which way to go now - this seems to be similar to how iPhone apps behave and I guess this will allow me to port to other OpenGL devices quite easily.
----- Original message ----- > On Tue, 2009-12-29 at 16:17 +0100, Tamminen Eero (Nokia-D/Helsinki) > wrote: > > Hi, > > > > ext Mark Clarkson wrote: > > > I have made a simple animation using a clutter timeline with > > > clutter-gtk-0.10 and clutter-1.0 but there is excessive tearing when the > > > animation plays making the animation look terrible. > > > > > > I have tried none, dri and glx values for the CLUTTER_VBLANK environment > > > variable but this seems to have no effect at all. > > > > > > Is there a way to fix this? > > > > Screen update isn't yet synched to LCD refresh. Please file a bug about > > it to bugs.maemo.org (it needs support from kernel display driver, X > > server, SGX driver, Clutter and hildon-desktop compositor, but I guess > > you could file it against Official platform -> Core -> X). > > Don't hold your breath with this one. At the moment it seems a proper > vsync support is not going to be implemented in Maemo 5. There is a > possibility to use a vsync even now, but the implementation is not good > enough: if you enable the current vsync, the OpenGL application is > blocked on glSwapBuffers until vsync comes, which prevents the > application to prepare the next frame (and drops FPS too low). > > I think doing like Bounce does is the best you can do: use fullscreen > window and disable the compositor (in hildon-desktop). Recent > hildon-desktop versions disable compositing automatically for fullscreen > windows, unless you use HildonStackableWindow (which requires the > sliding animation). > > -Kimmo > >
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