[Fontconfig] some bitmap fonts are discovered by fc-cache, some are not

[Akira TAGOH]

Those fonts aren't supported in fontconfig because can't detect any
charset from them. use non-transcoded version.
On Sat, Oct 13, 2018 at 6:55 PM Weiwu Zhang <a at colourful.land> wrote:
>
> I've installed all XFree86-ISO8859-2-1 fonts
>
> # ls /usr/share/fonts/X11/100dpi/lutRS18*
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-10.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-13.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-14.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-15.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-2.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-3.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-4.pcf.gz
> /usr/share/fonts/X11/100dpi/lutRS18-ISO8859-9.pcf.gz
>
> But 0 fonts are found with fc-cache
>
> # fc-cache -f -v /usr/share/fonts/X11/100dpi
> /usr/share/fonts/X11/100dpi: caching, new cache contents: 0 fonts, 0 dirs
>
> To experiment, I copied a font over to the same directory:
>
> # cd /usr/share/fonts/X11/100dpi
> # wget https://github.com/ifax/HylaFAX/raw/master/etc/lutRS18.pcf
> # fc-cache -f -v /usr/share/fonts/X11/100dpi
> /usr/share/fonts/X11/100dpi: caching, new cache contents: 1 fonts, 0 dirs
>
> In order to be sure the single newly found font is the one I just downloaded:
>
> # fc-list | grep 100dpi
> /usr/share/fonts/X11/100dpi/lutRS18.pcf: LucidaTypewriter:style=Sans
>
> Yes, it is.
>
> The question is of course why the fonts I installed is not recongised
> but the one I downloaded is.
>
> I installed it on Ubuntu 18.04 through:
>
> # apt-get install xfonts-100dpi-transcoded
>
> whose content is here:
> https://packages.ubuntu.com/bionic/all/xfonts-100dpi-transcoded/filelist
>
> Thanks!
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-- 
Akira TAGOH