Re: Redisplay problems?

[Eli Zaretskii]

> From: Stefan <address@hidden>
> Cc: address@hidden,  address@hidden,  address@hidden,  address@hidden,  
> address@hidden
> Date: Sat, 22 Mar 2014 11:42:07 -0400
> 
> >> > This is for visible frames, while we were discussing frames that are
> >> > iconified.
> >> AFAIK iconified frames don't get expose events.
> > Do frames get them when they are deiconified?
> 
> If and when needed, they should, yes.  E.g. not if they're deiconified
> but obscured by some other window.  And not if they're deiconified and
> redrawn directly by the window-system based on a backup of the previous
> window's content.  Otherwise, yes.

When frames that were iconified get the expose event, and the frame's
garbaged flag is not set, we will redraw them using outdated matrices,
because expose_frame uses the current glyph matrices without
recomputing them.