[HarfBuzz] Thai text render issue in Android L

[Jungshik SHIN (신정식)]

IIRC, what's suggested by Ed was one of options we presented to our Thai
speaking reviewers along with what we currently have in Noto Sans Thai UI
[1].  Our reviewers preferred the current way of dealing with a vertical
metric constraint to what Ed suggested (squishing glyphs).

We'll double check our record.

Jungshik


[1] note that 'Noto Sans Thai' (for body/document) does not have this
issue. It's only 'Noto Sans Thai UI' that had to come up with a "novel"
solution

On Tue, Nov 11, 2014 at 11:00 AM, Roozbeh Pournader <roozbeh at google.com>
wrote:

> With the latest HarfBuzz and Noto Sans Thai, I'm seeing the result I'm
> attaching, which appears correct to me (and the same as Android Kitkat
> result you've attached).
>
> But I see the same as what you are seeing on Android Lollipop. So this
> appears to be a bug somewhere in Android rather than HarfBuzz or Noto Sans.
>
> Please file a bug at https://source.android.com/source/report-bugs.html
> and send us a link to it. Thanks.
>
> On Tue, Nov 11, 2014 at 8:59 AM, Ed Trager <ed.trager at gmail.com> wrote:
>
>> Hi,
>>
>> To the best of my knowledge, it seems extremely unlikely that U+0E0E THAI
>> CHARACTER DO CHADA would have U+0E39 THAI CHARACTER SARA UU ( or U+0E38
>> THAI CHARACTER SARA U for that matter ) appear below it.
>>
>> I can't think of any Central Thai words that would have that kind of
>> spelling; and it seems even more unlikely that any of the minority
>> languages would use DO CHADA at all.
>>
>> Therefore, it seems very likely that the font designers did not specify
>> an anchoring position point for SARA U or SARA UU appearing below
>> consonants such as DO CHADA or U+0E0F THAI CHARACTER TO PATAK.
>>
>> - Ed
>>
>>
>> On Mon, Nov 10, 2014 at 10:16 PM, Nguyễn Đức An <annd1985 at gmail.com>
>> wrote:
>>
>>> Dear Harfbuzz developers,
>>> We have an issue with Thai text render in Android L. When input U+0E0E
>>> and U+0E39, it displays wrong (please see the attach screen).
>>> I checked Thai Noto font (Google font) and Samsung Thai (Samsung font),
>>> issue happens with both of them.
>>> As i read the source of Harfbuzz, Thai reshaping only does separate SARA
>>> AM to NIKHAHIT & SARAA. So maybe the problem is not came from Harfbuzz.
>>> Any help is welcome.
>>> Thank you.
>>>
>>> _______________________________________________
>>> HarfBuzz mailing list
>>> HarfBuzz at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/harfbuzz
>>>
>>>
>>
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>>
>>
>
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