Re: Drawing UI elements behind text

[Cecilio Pardo]

On 28/11/2024 12:56, Eli Zaretskii wrote:

> > This is working only if emacs is using a double buffered configuration.
> > Redisplay works on the back buffer, where we don't draw anything. When
> > the back buffer goes to the screen, we add the segments to the screen.
> > scroll_run_hook works on the back buffer.
>
> I see.  So the display code basically knows nothing about these
> segments?  And you need to redraw them in their entirety each
> redisplay cycle?

Yes, it knows nothing.

I still don't have the final form of the drawing, but probably yes, 
redraw on each redisplay.