RFR: JDK-8210547 synchronise with OpenGL after the last window is presented [v2]

[notzed]

On Tue, 25 Nov 2025 00:33:41 GMT, notzed <duke at openjdk.org> wrote:

>> As discussed on the mailing list.
>> 
>> OpenGL requires an explicit glFinish() to synchronise with the video refresh.  The current usage is incorrect and against the specification.  This patch calls glFinish() after all windows have been drawn following a pulse.
>
> notzed has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   JDK-8210547 synchronise with OpenGL after the last window is presented

Sorry I made a mistake with the push, Kevin directed me to send an "empty commit" to trigger automation and I couldn't work out how to do that otherwise at the time - until just after I'd done it and it was too late then.

I'll look at merging in bits of 1929, sans the visual stuff which seems unrelated.

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PR Comment: https://git.openjdk.org/jfx/pull/1981#issuecomment-3602079425