[HarfBuzz] Thai below-base normalization

[Theppitak Karoonboonyanan]

On Thu, Jan 23, 2014 at 9:41 PM, Jonathan Kew <jfkthame at googlemail.com> wrote:
> On 21/1/14 03:56, Theppitak Karoonboonyanan wrote:
>>
>> I'm trying to typeset Patani Malay text using Thai script as guided by
>> the Royal Institute, and I have some problems with Phinthu-
>> modified consonants with below-base vowel combined.
>>
>> See the sample text captured from the book here:
>>
>> http://linux.thai.net/~thep/shots/20140121-patani-sample-marked.jpg
>
> Interesting. Are there any cases (in Thai or other languages) where the
> Phinthu *is* written below the Sara-U or Sara-UU vowel?

AFAIK, no. But my knowledge is limited in this area.

> The comment in hb-unicode-private.hh suggests that Uniscribe behaves the
> same as (current) harfbuzz here. There appear to be only two examples of
> this in our thai-wikipedia word list, but I just checked, and Uniscribe does
> indeed render the Phinthu dot *below* the vowel in both cases:
>   <U+0E1B,U+0E3A,U+0E38,U+0E04,U+0E04,U+0E42,U+0E25>

This is a misspelt Pali word. Correction:

 <U+0E1B,U+0E38,U+0E04,U+0E3A,U+0E04,U+0E42,U+0E25>

>   <U+0E28,U+0E23,U+0E32,U+0E27,U+0E3A,U+0E38,U+0E12,U+0E34>

This is also a Sanskrit typo. U+0E3A should be removed to correct it.


Regards,
-- 
Theppitak Karoonboonyanan
http://linux.thai.net/~thep/