[Rd] Plotmath on Fedora 31 broken with with pango >= 1.44 - workarounds?

[Gavin Simpson]

Thanks Iñaki, that worked a treat.

Gavin

On Wed, 25 Mar 2020 at 04:28, Iñaki Ucar <iucar using fedoraproject.org> wrote:
>
> On Wed, 25 Mar 2020 at 01:14, Gavin Simpson <ucfagls using gmail.com> wrote:
> >
> > Dear list
> >
> > On Fedora 31 the pango library has recently updated to version >= 1.44
> > and in doing so has switched to using the HarfBuzz library (from
> > FreeType) and dropped Adobe Type 1 font support. This causes problems
> > with plotmath as all bar one of the glyphs doesn't render (see
> > attached PNG image if it makes it through the list filters - if not I
> > have shared a copy via my google drive:
> > https://drive.google.com/file/d/1llFqKHD7LFKzQbVuq6sibY1UizRn7xxS/view?usp=sharing
> > )
> >
> > I'm not the only person who has come across this, e.g.
> > https://stackoverflow.com/q/60656445/429846 and the resulting reported
> > bug on the RedHat Bugzilla:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1815128
> >
> > Beyond switching to  `type = 'Xlib'`, has anyone worked around this
> > issue on a Fedora 31 or later system?
>
> Adding devel using lists.fp.o to CC. A workaround is to avoid using PS fonts
> for symbols. If you run the following, you'll see
>
> $ fc-match Symbol
> StandardSymbolsPS.t1: "Standard Symbols PS" "Regular"
>
> So let's change this. Install a TTF symbol font, such as Symbola:
>
> $ sudo dnf install gdouros-symbola-fonts
>
> Then add the following to /etc/fonts/local.conf (system-wide) or
> ~/.fonts.conf (just for your user):
>
> <fontconfig>
> <match target="pattern">
>  <test name="family"><string>Symbol</string></test>
>  <edit name="family" mode="prepend" binding="same">
>    <string>Symbola</string>
>  </edit>
> </match>
> </fontconfig>
>
> Now you should see this:
>
> $ fc-match Symbol
> Symbola.ttf: "Symbola" "Regular"
>
> and symbols should render correctly.
>
> Iñaki



-- 
Gavin Simpson, PhD