Re: Unicode normalization and text display differences

[Behdad Esfahbod <behdad esfahbod gmail com>]

On 16-01-06 02:55 PM, Benjamin Kiessling wrote:
> On 01/06, Behdad Esfahbod wrote:
> > Hi Ben,
> >
> > You at least need to tell us on what platform you are testing this and with
> > what fonts.
>
> Sorry, I'm running on Debian testing (libpango-1.0 package version
> 1.36.8-3) and using it through GObject introspection from python
> (although that's probably not the issue here). Apart from setting up the
> whole CairoSurface and Layout shebang the code boils down to
> set_font_description/set_text/show_layout.
>
> The font family used is GFS Philostratos, although the issue persists
> only with GFS fonts as I'm realizing just now. Using DejaVu Sans output
> is independent of normalization form. Is this to be expected? The
> documentation is mute about such points (and in general about how it's
> supposed to be used).

It's probably the case that the GFS fonts don't support the combining marks,
and as such Pango picks them from a different font, which then breaks shaping.
 Ideally that would not happen, but that's the way it is currently.

behdad