bug#19117: 25.0.50; emacs on x11 chooses different fonts for the same face sometimes

[Stefan Monnier]

>  $ xlsfonts -fn "-urw-nimbus mono l-regular-o-normal--11-*-*-*-p-70-iso8859-1"
>  -urw-nimbus mono l-regular-o-normal--11-79-100-100-p-70-iso8859-1
> However, when I use a wildcard for the font size, (so * instead of 11),
> it reports that the 11-px font does NOT exist, but a 17-px one does:
>  $ xlsfonts -fn "-urw-nimbus mono l-regular-o-normal--*-*-*-*-p-70-iso8859-1"
>  -urw-nimbus mono l-regular-o-normal--17-120-100-100-p-70-iso8859-1

That's indeed the expected behavior for server-side scaled bitmap fonts.

> What if Emacs treated scalable fonts by looking at the actual px-sizes
> that were available (17 in this case) and only evaluating those?

IIUC if `scalable-fonts-allowed' is set to nil, that's what should happen.


        Stefan