[HarfBuzz] [PATCH] Added an Indic shaper

[Tom Hacohen]

Dear all,

Thanks to Olivier Berten who let me know that all I need is to tell hb
which opentype features I want to use in order for Indic to work, I got
Indic scripts to work.

As said before, I can't read these languages, but from what I have seen,
it works like a charm. I just took the list of features used in
Harfbuzz.old and hacked together an Indic shaper.

Attached is a patch implementing that shaper.

I don't know if adding those features is really enough, nor am I sure
they need to be applied on all the scripts I applied them all, but this
patch gets the job done. It's now roughly the same as the Arabic shaper.

Let me know if you have any comments.

Thanks,
Tom.

P.S
Why don't we use the "init" feature by default?
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