[HarfBuzz] Overlap of vocal with thai text

[Konstantin Ritt]

2015-06-30 12:45 GMT+03:00 Vignesh Raman <rvignesh.raman at gmail.com>:

> Hi Konstantin,
>
> Sorry to open this topic again.
>
> On Mon, Mar 2, 2015 at 7:19 PM, Konstantin Ritt <ritt.ks at gmail.com> wrote:
> > 2015-03-02 21:52 GMT+04:00 Vignesh Raman <rvignesh.raman at gmail.com>:
> >>
> >> I checked this thai font issue on a board with Qt 4.7.4 libs and this
> >> happens with one particular font DejaVuSans.ttf.
> >> When I tried DejaVuSansCondensed.ttf font the issue is not seen. I
> >> wonder any of the harfbuzz-thai calls are not invoked for DejaVuSans
> >> font?
> >
> >
> > Might be a font issue. I already seen bugs related to an incorrect
> metrics
> > in DejaVu fonts.
>
> How to check if the font has incorrect metrics?
>

Not with Qt itself. Try i.e. FontForge.


> >
> >>
> >> Does font make a difference in harfbuzz bundled code
> >> (src/3rdpart/hafbuzz) in Qt.
> >
> >
> > Sure it does. Try inspecting the font's tables and metrics.
>
> Is there a way to tell that the font ascent, descent values are incorrect?
> Is there a ratio between ascent and descent that Qt expects to render
> font correctly?
>

Nope.


Regards,
Konstantin
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