Re: [Fontconfig] Application fonts with Pango+fontconfig

[Behdad Esfahbod <behdad behdad org>]

On 15-05-12 01:17 PM, Behdad Esfahbod wrote:
> On 15-05-10 12:10 PM, Khaled Hosny wrote:
> > On Fri, May 01, 2015 at 07:19:11PM -0400, Behdad Esfahbod wrote:
> > > Hi all,
> > >
> > > I am at the Libre Graphics Meeting in Toronto this week, which meant that I
> > > got to talk to GIMP and Inkscape developers after many years, and was reminded
> > > that Pango still doesn't make it easy to use custom (aka application fonts),
> > > and it still does not allow one to turn OpenType features on or off.  So I
> > > ended up doing a complete review of the stack, fixed small stuff, filed many
> > > bugs, and documented it all.  Details here:
> > >
> > > http://mces.blogspot.ca/2015/05/how-to-use-custom-application-fonts.html
> > >
> > > Hopefully we can make the next release of the stack much better, and work with
> > > app developers to integrate these.
> >
> > I gave it a try[1] and it seems to work for my use case (I don’t even
> > need to select a Pango font, since might is the only one Pango seems to
> > just pick it), with one glitch: If the font gets changed while the
> > viewer is open (e.g. adding or removing glyphs), Pango will start
> > drawing garbage glyphs (seems to be using the old glyph indices) even
> > though I recreate the config, fontmap, layout and everything. This is
> > specially important for this application as I use it to test fonts while
> > I’m working on them, not sure if it is that relevant for common use
> > cases.
>
> That's so weird.  How do you test this?
>
> I just ran it, and if I copy a new font on top of the filename, the app
> instantly picks it up (I'm not sure how!), but there doesn't seem to any issue
> with glyph numbers.  I tested copying NotoNastaliq and IranNastaliq on top of
> each other and it works just fine.

Ignore that.  I was testing with an old binary apparently.  Let me fix this.



> > This seems to be a general Pango issue, if I modify a font while
> > an application is using it, I get similar issues. 
> >
> > Regards,
> > Khaled
> >
> > 1. https://github.com/khaledhosny/fontview/commit/0353750

-- 
behdad
http://behdad.org/