EGL_MESA_screen_surface proposal

[Alex Deucher]

On Wed, 16 Mar 2005 14:51:23 -0700, Brian Paul
<brian.paul at tungstengraphics.com> wrote:
> Jon Smirl wrote:
> > On Wed, 16 Mar 2005 13:21:08 -0700, Brian Paul
> > <brian.paul at tungstengraphics.com> wrote:
> >
> >>Suppose I have two screens attached to my system, one with max refresh
> >>of 85Hz and the other with max refresh at 72Hz.  Now suppose I simply
> >>want to drive both screens at the same rate (perhaps so my stereo
> >>goggles work).  I want to select the 72Hz mode on the first screen
> >>whether or not it's the "best" mode.  (and I don't want to have to go
> >>edit my /etc/fb.config file) and restart.
> >
> >
> > That won't work without an external sync generator. With external sync
> > the 85hz mode would disappear.
> 
> OK, suppose I don't have goggles and I'm not doing stereo.  I just
> want the two screens to run at the same refresh rate and I don't care
> if they're synchronized!

What about sync to vrefresh with a multihead 3D or video application. 
you'd want them to have the same refresh.

> 
> I'm trying to provide semi-concrete examples of why I want flexibility
> in the API.  I guess you'll just shoot down everything I come up with.
> 
> -Brian