[Development] Any plans on updating harfbuzz?

[Konstantin Ritt]

See https://bugreports.qt-project.org/browse/QTBUG-18980

The work is in progress and would probably be targetted to 5.1 or 5.2.

Konstantin


2012/9/22 Mark <markg85 at gmail.com>:
> On Sat, Sep 22, 2012 at 3:03 PM, Mark <markg85 at gmail.com> wrote:
>> Hi,
>>
>> I actually came across this one by accident. I was playing with
>> qtperf4 [1] and was profiling the "QTextEdit - add text" since that
>> seems a bit slow and equally slow on raster and native. So, after
>> profiling it turns out that the vast majority of that benchmark is
>> spending it's time in qShapeItem which in turn ends up (after a bunch
>> of calls) in HB_GPOS_Apply_String and HB_GSUB_Apply_String. About
>> 4/5th of the benchmark time is spend there.
>>
>> So i was wondering if Qt was using the latest harfbuzz which
>> apparently isn't the case. It's not even visible which version Qt
>> ships by default, but it is visible that the current harfbuzz
>> development is a lot further [2].
>>
>> Note: the above mentioned profiling was on Qt 4.8.3, not 5.0 beta,
>>
>> Cheers,
>> Mark
>>
>> [1] http://code.google.com/p/qtperf/
>> [2] http://cgit.freedesktop.org/harfbuzz/
>
> For reference, the 0.9.2 release
> https://mail.gnome.org/archives/gnome-announce-list/2012-August/msg00024.html
> which also notes: "I can finally claim that new HarfBuzz is in par
> with or better than both Pango and old.HarfBuzz / Qt."
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