Re: Emacs Mac port

[Stefan Monnier]

> That shows a typical reason why recent toolkits treat the "expose"
> handler as the primary drawing method.  By freshly redrawing
> invalidated area in a rear-to-front way, it can provide some fancy
> appearances such as overlapped/translucent widgets in a correct way.

So IIUC, the "new normal" way you describe goes something like:
- redisplay builds glyph matrices from Lisp data and invalidates the
  parts of the display that might need to be redrawn but does not draw.
- expose handlers use the glyph matrices to draw on the screen
  when/where needed.
That makes a lot of sense.


        Stefan