DRM page-flip with damage for weston

[Deepak Singh Rawat]

> 
> The damage region received during output repaint is in Weston's global
> co-ordinate space. To shift to CRTC co-ordinates, you need to
> translate the damage region by (-output->x, -output->y). When we are
> using the renderer, there is no scaling, so CRTC co-ordinates and
> framebuffer co-ordinates are guaranteed to be equal. This only
> accounts for the primary plane; damage to views on other planes is
> considered separately.
> 
> Also, if you are not already working from git master, I recommend you
> do so, as the DRM backend has changed hugely since 4.0.0.

Thanks Daniel for help and it the change suggested by you are working with
my drm code. Another question regarding Weston, does each output in
Weston create separate scan-out framebuffer always ?

Thanks,
Deepak


> 
> Cheers,
> Daniel