Re: Format of -dshow-available-fonts output

[Aaron Hill]

On 2018-07-17 12:52, Urs Liska wrote:
> Of course I can use the fontconfig commands to investigate the matter,
> but in the end I'll have to take what LilyPond reports. I'm a little
> bit disappointed that it doesn't tell me the filenames.

That is something we could file a bug against.  The code, as I 
mentioned, *would* show the filename if FC_FILE had been included.  To 
match the default behavior of fc-list, LilyPond should probably be 
outputting file+family+style at a minimum.

> Further tests have shown that my initial impression of reversed
> style/fontname matches was wrong. The number of items left and right
> of the colon vary wildly, and my current conclusion is:
>
>  * Each entry covers exactly one font face (= font file)
>  * One or more names (left side) are synonymous
>  * One or more styles (right side) are synonymous as well

That would seem to make sense to me.

> Take this example (the formatting is already the result of parsing
> into Python objects:
>
> EB Garamond
> ['EB Garamond', 'EB Garamond 08']
> ['08 Italic', 'Cursiva', 'kurzíva', 'kursiv', 'Πλάγια', 'Italic',
> 'Kursivoitu', 'Italique', 'Dőlt', 'Corsivo', 'Cursief', 'Kursywa',
> 'Itálico', 'Курсив', 'İtalik', 'Poševno', 'Etzana']
> EB Garamond
> ['EB Garamond', 'EB Garamond 08']
> ['Standard', '08 Regular', 'Normal', 'obyčejné', 'Κανονικά',
> 'Regular', 'Normaali', 'Normál', 'Normale', 'Standaard', 'Normalny',
> 'Обычный', 'Normálne', 'Navadno', 'Arrunta']
> EB Garamond SC
> ['EB Garamond SC', 'EB Garamond SC 08']
> ['Standard', '08 Regular', 'Normal', 'obyčejné', 'Κανονικά',
> 'Regular', 'Normaali', 'Normál', 'Normale', 'Standaard', 'Normalny',
> 'Обычный', 'Normálne', 'Navadno', 'Arrunta']
>
> The plain string is the "font family".
> The first Python list is the comma-separated first part of the entry,
> the second list the comma-separated list following ":style="
>
> I would read this as having two independent variants "EB Garamond" and
> "EB Garamond SC" where both can be addressed with an alias "... 08".
> EB Garamond is available in two styles: Italic and Regular, with both
> styles having numerous aliases. The SC variant is only available as
> Regular with numerous aliases.
>
> Does this sound reasonable?

That would also make sense.

-- Aaron Hill