https://bugs.documentfoundation.org/show_bug.cgi?id=114160
Volga <shanshandehongx...@outlook.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |103729
--- Comment #15 from Volga <shanshandehongx...@outlook.com> ---
(In reply to Eyal Rozenberg from comment #13)
> Even though I haven't managed to get the Sample ODT to display the intended
> glyphs, this bug still manifests - assuming that the gray lines between
> characters are ZWJ's. Tested with:
>
> Version: 6.1.1.2
> Build ID: 5d19a1bfa650b796764388cd8b33a5af1f5baa1b
> CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk2;
> Locale: en-GB (en_GB.UTF-8); Calc: group threaded
This file is using Abkai Xanyan fonts to render the text, you can get the fonts
from here before you reproduce with sample ODT:
http://abkai.net/core/en/manchu/manchu-fonts/
(In reply to ssmithg1 from comment #14)
> In response to Comment 11, this worked fine in LO 5.2.7.2 but is broken in
> 5.3.2.2, so the culprit is somewhere between those two versions, in case
> that helps.
>
> I should say that this is a serious issue for Indic scripts (eg, Devanagari
> etc). In these scripts, ZWJ is used following a halant (virama) between two
> consonants, to block the formation of a conjunct form. In Devanagari this
> generally results in a half-form of the 1st consonant. [See the section
> "Explicit Half-Consonants" in chapter 12 of the Unicode Standard.] Breaking
> the line there leaves a half-character at the end of the line, which is
> invalid. So until this is fixed we have to revert to LO 5.2.7.2 or use
> another editor.
So it seems to me that LibreOffice have something missing, or some specific
Unicode properties doesn’t properly handled after new text layout backend is
introduced in 5.3.
Referenced Bugs:
https://bugs.documentfoundation.org/show_bug.cgi?id=103729
[Bug 103729] [META] HarfBuzz-based common text layout regressions
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