https://bugs.documentfoundation.org/show_bug.cgi?id=111967
--- Comment #15 from Mark Hung <[email protected]> ---
>
> Yes, I remember now. I was actually setting next to Behdad when he was
> hacking this code for that release and I remember wondering if these changes
> are going to affect the brittle way we (I) position vertical glyphs.
> Unfortunately all the details escape me know and I need to dig both the
> HarfBuzz changes and the related LibreOffice code to have anything
> meaningful :( Actually I think that is why I didn’t update our bundled
> HarfBuzz all that time.
Hi Khaled,
I checked more detail today.
Inside hb-font-private.hh, fallback version of get_glyph_h_origin() and
get_glyph_v_origin() were introduced in 1.3.4. It worked if I replace those
back to non-fallback version in subtract_glyph_h_origin() ,
subtract_glyph_v_origin(), get_glyph_h_origin_with_fallback(),
get_glyph_v_origin_with_fallback().
The test might be naive, but guess_v_origin_minus_h_origin() looks suspicious
from my point of view. I don't know how it might related to "how you position
vertical glyphs". I'll try to check that if you have some code pointers.
BTW, 1.5.0 and 1.5.1 don't work too.
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