[HarfBuzz] Hangul Shaper (was Re: an issue regarding discrepancy between Korean and Unicode standards

[Behdad Esfahbod]

Ok, given how confusing this thread has become, please create a Google Doc,
and write down what you think the HarfBuzz Hangul shaper should do.  Modify it
as much as you want, but keep it as short as possible.  Please make the doc
commentable by the public, and send the link here.

Thanks,
behdad

On 13-04-16 10:10 AM, Dohyun Kim wrote:
> 2013/4/16 Dohyun Kim <nomosnomos at gmail.com>:
>> 2013/4/15 Dohyun Kim <nomosnomos at gmail.com>:
>>>
>>> The behavior of new Uniscribe is quote confusing and seems to be
>>> inconsistant on some points.  I cannot describe concisely what it
>>> does.  But it is evident that it renders correctly only those input
>>> sequence which is compliant to KS X 1026-1.
>>>
>>
>> OK.  My guess about the behavior of new Uniscribe:
>>
>> 1.  demarcate syllable blocks according to KS X 1026-1
>>
>>    - between L and L, V and V, T and T, or L and T (these are illegal string)
>>    - between V and L, T and L, or M and L (these are legal break point)
>>    - between Jamo and non-Jamo character including Hangul syllables
>>    - but not between L and V, V and T, T and M, V and M, LVT and M, LV and M.
> 
> Oh, I have left out one stunning thing.  I really dislike this sort of behavior:
> 
>    - The Jamo sequence of <L V T> is divided into <L | V | T>, if
> equivalent <LVT> syllable exists.
>    - Likewise, <L V> sequence is divided into <L | V>, if it is not
> followed by T and equivalent <LV> syllable exists.
> 
>>
>> where LVT and LV are Hangul syllables; L, V, and T are Jamos; M means
>> Hangul tone marks (U+302E or U+302F)
>>
>> 2.  reorder Hangul tone marks
>>
>>     - if syllable block is well-formed, move M from the last to the
>> first of the cluster.
>>     - if syllable is not well-formed, Uniscribe does not move M.
>> Instead, U+25CC is inserted after M.
>>
>> where "well-formed" means <LVT>, <LV>, <L V T>, or <L V>.
>>
> 
> --
> Dohyun Kim
> College of Law, Dongguk University
> Seoul, Republic of Korea
> 

-- 
behdad
http://behdad.org/