[HarfBuzz] Change in HarfBuzz after version 0.90 ?

[Behdad Esfahbod]

Yes, I pushed an equivalent patch, if not the exact same.

On 14-01-03 04:41 AM, Ed Trager wrote:
> Oh, wait, you did push Jonathan's patch, thanks so much!  Sorry I missed that
> first time around!
> 
> 
> On Thu, Jan 2, 2014 at 3:38 PM, Ed Trager <ed.trager at gmail.com
> <mailto:ed.trager at gmail.com>> wrote:
> 
>     Happy New Year, Behdad!
> 
>     Hey just wondering what do you think about Jonathan's patch (attached below)?
> 
>     Best - Ed
> 
> 
>     ---------- Forwarded message ----------
>     From: *Jonathan Kew* <jfkthame at googlemail.com
>     <mailto:jfkthame at googlemail.com>>
>     Date: Fri, Dec 27, 2013 at 12:09 PM
>     Subject: Re: [HarfBuzz] Change in HarfBuzz after version 0.90 ?
>     To: Ed Trager <ed.trager at gmail.com <mailto:ed.trager at gmail.com>>, Danh
>     Hong <danhhong at gmail.com <mailto:danhhong at gmail.com>>, Behdad Esfahbod
>     <behdad at behdad.org <mailto:behdad at behdad.org>>
>     Cc: Martin Hosken <mhosken at gmail.com <mailto:mhosken at gmail.com>>, Richard
>     Wordingham <richard.wordingham at ntlworld.com
>     <mailto:richard.wordingham at ntlworld.com>>, Theppitak Karoonboonyanan
>     <theppitak at gmail.com <mailto:theppitak at gmail.com>>, Harfbuzz
>     <harfbuzz at lists.freedesktop.org <mailto:harfbuzz at lists.freedesktop.org>>
> 
> 
>     On 27/12/13 16:21, Ed Trager wrote:
> 
> 
>         Hi, Martin, Richard, and Danh Hong,
> 
>         With regard to forcing the re-ordering of the
>         UCD-enforced-but-totally-__broken normalisation of TAI THAM TONE MARK plus
>         U+1A60, does the following approach in the OpenType feature file make
>         sense as the quickest and cleanest way to do it or not?:
> 
>         Basically the idea is to compose the out-of-order pair of characters
>         into a ligature; and then take that ligature and decompose it back to a
>         pair of characters that are in the correct order:
> 
>         If there is a better way to do this in OpenType, please enlighten me!
>         :-)  I was trying to get this to work last night, so far without success:
> 
> 
>     The trouble with this idea (or at least one trouble with it!) is that by
>     the time your lookups have a chance to do anything, harfbuzz has already
>     inserted dotted-circle glyphs because it treated the (normalized) sequence
>     as being a "broken" cluster. The pattern for a "consonant syllable" in the
>     SEAsian shaper allows for a <sakot, consonant> pair (i.e. a subjoined
>     consonant) among the various possible syllable-tail items, but it does not
>     allow for the <sakot> and <cons> to be separated by other marks, which is
>     what the normalization does.
> 
>     You -might- be able to work around this by explicitly including the dotted
>     circles in your ligature-composition rules, though that will make them all
>     more cumbersome. The better way forward is for us to fix harfbuzz, as
>     previously suggested.
> 
>     Possible patch attached; Behdad, wdyt?
> 
> 
> 
> 
> 
> 
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-- 
behdad
http://behdad.org/