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

From: Kuisma Salonen kuisma.salonen at maemo.org
Date: Mon May 29 14:42:32 EEST 2006
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

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