RFR: 8361381: GlyphLayout behavior differs on JDK 11+ compared to JDK 8 [v3]

[Phil Race]

On Fri, 22 Aug 2025 18:21:18 GMT, Volker Simonis <simonis at openjdk.org> wrote:

> > I already ran all our automated tests, and I'm not too surprised they pass, since they probably don't cover this as well as they should.
> 
> Thanks!
> 
> > I think it would be possible and a good idea to add a test. All you need to do is find a font that definitely supports Khmer.
> 
> I can use [`hb-subset`](https://man.archlinux.org/man/extra/harfbuzz-utils/hb-subset.1.en) to create a subset of the [KhmerOS](https://www.cambodia.org/fonts/) open source font (licensed under LGPL 2.1 or later) which will be just enough for the test and check that in along with the test. The subsetted font file will be 28kb. Would that be acceptable

No. That won't be allowed. You aren't using your own IP.
I meant just use Font.canDisplayUpTo(String) on the physical fonts on the system until you find one that can that can render the entire string. This will work on Windows + Linux. Mac, unfortunately it will be less useful since all fonts will report they support Khmer. I would skip the test on Mac.

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PR Comment: https://git.openjdk.org/jdk/pull/26825#issuecomment-3215420938