On Thu, Nov 08, 2018 at 08:28:03AM -0800, Aaron Jensen wrote:
> On November 8, 2018 at 8:17:21 AM, Alan Third
> (alan@idiocy.org(mailto:alan@idiocy.org)) wrote:
> 
> > If I could suppress the clearing action that would solve the problem.
> >
> > If expose_frame could draw the rectangle as it was before the
> > frame/window was marked garbaged, that would also solve the problem.
> >
> > I don’t believe the former is possible, and I don’t know if the latter
> > is possible.
> 
> I’m only partially following this now, so I’m sorry if this idea
> doesn’t make sense—but if there’s a spot where the repaint actually
> happens, could you dirty the rects right before the repaint. In other
> words, queue into a queue the rect dirtying in all the places it
> happens and only actually process the dirty queue once you know you
> can paint.

Yes, and I hadn’t thought of that option. It makes a lot more sense
than queueing the clears. I’ve got another patch for you to try first,
though. This one requires the previous one (i.e. you should be able to
just apply it without the removing anything).
-- 
Alan Third