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

From: Gustavo Sverzut Barbieri Gustavo.Barbieri at indt.org.br
Date: Mon May 29 12:28:17 EEST 2006
On Monday 29 May 2006 08:42, ext Kuisma Salonen wrote:
> 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.


This is a good resource to look at. This guy (http://scanline.ca) is extremely 
good in computer graphics, you may read his code and if it still doesn't 
work, mail him.

Gustavo Sverzut Barbieri
INdT, Recife, Brazil

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