[HarfBuzz] Passing full text to HarfBuzz

[ext-naja.naja at nokia.com]

Hi Guys,

I have noticed that HB_ShaperItem (or HB_ShaperItem_) has an object HB_ScriptItem contains position and length field. My understanding this would allow the HarfBuzz adaptation layer to specify only a subset of the of string (passed to the shaper) to be actually shaped.

Why is this feature implemented ? is there any situation\language where HarfBuzz needs to know the broader context of the string to be shaped (e.g. look at the characters before or after the string) ?


Regards,
Jamil
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