Support for Ligatures

[Philip Race]

FX does (of course) support required ligatures, meaning those without 
which some script (eg Arabic)
can't even be rendered.

But that is implementation, no API.

So this is about adding an API to request optional ligatures - and other 
OpenType features.
For example I think we'd want to support things like small caps etc.

Of course we'd need to make sure all the measuring code is up to that .. 
and BTW
the APIs to do measurement probably should be in the queue ahead of this ..

And I am not sure about just an API to request ligatures without an API 
to query
if ligatures are available for a font. However that may turn out to be 
tricky for a
few reasons, but we should at least study it.

And to try to answer the "when" question .. it is on a "desired" list in 
my head and maybe
even on a wiki somewhere .. but no concrete timetable exists.

But it is good to get feedback like this so we know it is interesting to 
developers.

-phil.

On 10/24/22 12:07 PM, Scott Palmer wrote:
> Something I noticed while experimenting with RichTextFX, when I set it 
> to use Fira Code for the font, like I do in NetBeans, I see that 
> JavaFX doesn't support ligatures.  I found this issue that's been 
> around for quite some time:
> [JDK-8091616] Prism: font: ligature and kerning support - Java Bug 
> System <https://bugs.openjdk.org/browse/JDK-8091616>
> bugs.openjdk.org <https://bugs.openjdk.org/browse/JDK-8091616>
> 	jira-favicon-hires.png <https://bugs.openjdk.org/browse/JDK-8091616>
>
> <https://bugs.openjdk.org/browse/JDK-8091616>
>
> Is there any drive to get this implemented within the next few 
> releases?  I would help, but unfortunately I suspect it will take more 
> time than I can commit to it.
> I’m hoping that eliminating some of the remaining gaps between what 
> JavaFX supports and Swing supports would be a priority, as it removes 
> some barriers to JavaFX adoption... but maybe not?
>
> Regards,
>
> Scott
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