[maemo-developers] [maemo-developers] SDL vertical blank (vbl) sync.

[From: Kuisma Salonen]

Visti Andresen wrote:
> Hi I was wondering if anyone knows how to sync. the SDL_Flip to the vertical blanking of the display.
>
> While it is nice to get 47+ FPS while memset'ing the display, I would rather be synced to the display and avoid the tearing at the cost of FPS.
>   
This is actually generic issue, not just SDL one. When you call 
SDL_Flip() (or SDL_UpdateRects() etc) it "draws" local data to the 
display HW, and this goes through X. Having synchronization in the 
display driver would solve this. Anyway I am not the person to say more 
about this as I am not enough aware of display HW internals to tell how 
hard implementing this would be and whether it would even be possible.

-- Kuisma