[cairo] Notification when a surface gets dirtied

[Mike Emmel]

It would be nice if cairo exported the function since then all the
backends could implement it.
In particular glitz and DirectFB.  Btw what is the use case for this ?

On 11/18/05, Alexander Larsson <alexl at redhat.com> wrote:
> On Thu, 2005-11-17 at 12:45 -0600, Federico Mena Quintero wrote:
> > Hi,
> >
> > Short story:  I'd like to have a way to get notified when a surface gets
> > written to.  For example,
> >
> >   typedef (* SurfaceModifiedFunc) (cairo_surface_t *surface,
> >                                    Rectangle        dirty_rect,
> >                                    void            *user_data);
> >
> >   void cairo_surface_set_dirty_notify_func (cairo_surface_t    *surface,
> >                                             SurfaceModifiedFunc callback,
> >                                             void               *user_data);
> >
> > Does that make sense?  It's similar in spirit to XDAMAGE, but for Cairo surfaces.
>
> Can you not just draw into a pixmap and actually use XDAMAGE?
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>  Alexander Larsson                                            Red Hat, Inc
>                    alexl at redhat.com    alla at lysator.liu.se
> He's a suave Jewish jungle king fleeing from a secret government programme.
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