On Fri, Mar 12, 2021 at 08:44:55PM -0600, Stefan Kangas wrote:
> Alan Third <alan@idiocy.org> writes:
> 
> > On Thu, Mar 11, 2021 at 10:01:11PM +0200, Eli Zaretskii wrote:
> >> >
> >> > I think SVG is obviously much preferable to XPM, but there is still the
> >> > problem that the images don't scale with the text.  Do we have a general
> >> > solution to that?  If not, should we have one?
> >>
> >> With SVG, I believe we could.  (We can scale other kinds of images as
> >> well, but they don't look well when enlarged, AFAIK.)
> >
> > I've been thinking about this, and assuming we can extract the font
> > name and size from the face in C then we can create a default CSS
> > stylesheet that should make 1em in an SVG equivalent to the actual
> > Emacs font height.
> 
> I took a stab at adding SVG icons, as found in the GNOME Adwaita Icon
> Theme.  I had to scrub some color details from the SVG files by hand,
> but they now seem to automagically adapt to the :foreground and
> :background of the current face (but I could be wrong about that as I
> don't understand how this is supposed to work).
> 
> How would a patch like the attached relate to the changes you propose,
> Alan?

I've attached a proof of concept patch for what I'm talking about.
Stefan's patch must be applied first and it requires at least librsvg
2.48 and might foul up if create-image starts automatically changing
scale (it's fine here).

Does this look like the sort of behaviour you were thinking of, in
terms of icon sizing?
-- 
Alan Third