[HarfBuzz] Overlap of vocal with thai text

[Konstantin Ritt]

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.


> 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 trace harfbuzz-thai.c function calls for eg
> thaiWordBreaks.
>

I don't think so. You could build Qt with debug symbols and try to debug
harfbuzz-thai.c, though I'd better inspect the problematic font prior to
digging so deep.


Konstantin
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