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

[Lukasz Kostyra]

On Tue, 2 Dec 2025 03:49:47 GMT, notzed <duke at openjdk.org> wrote:

> I suppose I could see if using glXSwapIntervalEXT() makes a difference here.

It might be better to switch to `glXSwapIntervalEXT()` then. It seems to be more consistent across all platforms (ie. works on Intel where the others don't for some reason). I'll be waiting for your updates, and I think we can close #1929 then. Thanks for attaching the test program too, it'll come in handy.

Even though these changes are simple, they do go quite deep so we'll need to spend some extra time reviewing and testing them.

A couple of formalities as well:
- PR title must begin with issue number without `JDK-` and followed by a colon
- Text following the issue number must be the same as the JBS issue counterpart

So in this case, PR should be named exactly like #1929 for Skara to properly connect it.

Last but not least, when you update this branch please don't use `git rebase` and force pushes, as it breaks the review tool and makes it harder for us to iteratively review your changes. If you ever need to catch up to master or to resolve any conflicts, use `git merge` instead.

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PR Comment: https://git.openjdk.org/jfx/pull/1981#issuecomment-3601619573