Re: Cullng drawing depending on visibility events

[Soeren Sandmann <sandmann daimi au dk>]

Sven Neumann <sven gimp org> writes:

> Hi,
> 
> Federico Mena Quintero <federico ximian com> writes:
> 
> > So I wrote a quick patch to make the drawing functions not do anything
> > if windows are fully obscured.
> 
> shouldn't windows who are fully obscured not get any expose events at
> all? Any sane application that only redraws itself in response of an
> expose event shouldn't have this problem anyway. For generated expose
> events (from timers etc.), it might make sense to delay the event
> until the window becomes visible again. Doing this in the drawing
> functions seems to be the wrong place, or did I miss something ?

Yeah, that is simpler than the patch I just sent. Simply doing 

        if (window->fully_obscured)
          {
            throw_invalid_region_away();
            return;
          }

before emitting the expose event, should work just as well.


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