Re: How to determine if a font is a fallback font?

[Thomas Morley]

2015-04-28 10:12 GMT+02:00 Urs Liska <address@hidden>:
>
>
> Am 28.04.2015 um 10:07 schrieb Thomas Morley:
>>
>> 2015-04-28 9:23 GMT+02:00 Urs Liska <address@hidden>:
>>>
>>> Hi all,
>>>
>>> #(ly:font-config-get-font-file "Emmentaler-13")
>>>
>>> gives me the full path to the font file used by the "Emmentaler-13" font.
>>> If
>>> I use a non-existent font name, say
>>> #(ly:font-config-get-font-file "SomeFont")
>>> I get a reference to emmentaler-11.otf, which is obviously used as
>>> fallback
>>> font by fontconfig.
>>> However, a Windows user reported that the same references "marlett.ttf"
>>> on
>>> his system.
>>
>> On my very old and outdated Ubuntu-system
>> #(display (ly:font-config-get-font-file "emmentaler-13.otf"))
>> in a lily-file returns:
>> /home/harm/.fonts/wds052801.ttf
>> which is surely not what I'd expect.
>
>
> And what about
>
> #(display (ly:font-config-get-font-file "Emmentaler-13"))

->
/home/harm/.fonts/wds052801.ttf

>
> ?
> (it expects the font name and not the file name (actually that's the point
> of the function))
>
> But it shows that my assumption was correct that the approach isn't reliably
> enough.
>
> What's the output of
>
> #(display (ly:ttf-ps-name (ly:font-config-get-font-file "Emmentaler-13")))

->
WaltDisneyScript

Should I type rofl or :(((

Cheers,
  Harm

> ?
>
> Urs
>
>>
>> Cheers,
>>    Harm
>>
>> Btw, none of the fallbacks in the file you sent privately works for me.
>
>
> Which is clear from the above.
>
>
>>> I wanted to use this approach to determine if a requested font exists on
>>> the
>>> user's system, but now I'm not sure anymore if that's a reliable
>>> approach.
>>> Of course I can simply add the check for marlett.ttf, but I have the
>>> impression that the returned fallback font isn't hard-coded but can vary
>>> with the user's installation or font availability.
>>>
>>> So:
>>> 1)
>>> Does anyone know of another approach to determine if a given font is
>>> visible
>>> to fontconfig?
>>> (I can't check for the file name because this doesn't necessarily match
>>> the
>>> font name)
>>>
>>> or
>>> 2)
>>> Is there a function to retrieve the "font name" from a given file name?
>>> It would be a viable approach if I could compare the result of that
>>> request
>>> with the original font name.
>>>
>>> TIA
>>> Urs
>>>
>>> _______________________________________________
>>> lilypond-user mailing list
>>> address@hidden
>>> https://lists.gnu.org/mailman/listinfo/lilypond-user
>
>