bug#40047: 26.2; Images in tooltip-mode tooltips broken on Linux and OSX

[Eli Zaretskii]

> Date: Sat, 14 Mar 2020 00:17:25 +0100 (CET)
> From: Alan Third <alan@idiocy.org>
> Cc: 40047@debbugs.gnu.org, dlacewell@gmail.com
> 
> On Fri, Mar 13, 2020 at 05:57:30PM +0200, Eli Zaretskii wrote:
> > > Date: Fri, 13 Mar 2020 16:17:25 +0100 (CET)
> > > From: Alan Third <alan@idiocy.org>
> > > Cc: 40047@debbugs.gnu.org
> > > 
> > > On macOS the tooltips are extremely basic and don’t support anything
> > > other than a few colour options and possibly a change of font.
> > 
> > Can Emacs on macOS use its own tooltip code?  If so, perhaps we should
> > make that the default on macOS?
> 
> You mean the basic toolkit tooltips?

Not sure what you mean by that.  I meant the tooltips w implement in
Emacs's own code, whereby a tooltip is a special kind of frame.

> It should be able to. I get the impression custom tooltips were
> originally only implemented so they could have a yellow background
> like on other terms.

The tooltips implemented in Emacs's own code also have a yellow
background.  And it's a frame, so the faces we use there can be
customized, see tooltip-frame-parameters.