[HarfBuzz] Cluster question (Was Cluster soap box time)

[Behdad Esfahbod]

On Tue, Nov 27, 2018 at 8:34 PM Ansel Sermersheim <ansel at copperspice.com>
wrote:

> On 11/19/2018 07:16 PM, Behdad Esfahbod wrote:
>
> Hi Ansel,
>
> On Mon, Nov 19, 2018 at 7:44 PM Ansel Sermersheim <ansel at copperspice.com>
> wrote:
>
>> ...We have tried cluster
>> levels 0 and 1, and neither one worked as we expected. In every case,
>> combining accents are marked as being in a separate cluster to the base
>> codepoint. For example, U+0061 Latin Small Letter A followed by U+0308
>> Combining Diaeresis are being placed in adjacent clusters rather than
>> the same cluster.
>
>
> That doesn't sound right.  Are you setting any custom unicode-funcs on the
> buffer?  Only thing I can think of that can do this is faulty / missing
> Unicode funcs.
>
>
> We had a feeling something was missing. No, we are not supplying any
> unicode funcs. Do you have a sample or documentation reference for what we
> need to supply?
>

Not supplying anything is good.  Was just ruling out that as a cause.


> I have looked at the online documentation without seeing a clear list of
> what is required. We are specifically looking to use harfbuzz to decipher
> special case grapheme breaks.
>

Can you check with hb-shape command-line tool, to make sure what you expect
is what HarfBuzz produces there?

-- 
behdad
http://behdad.org/
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