[jfx25u] RFR: 8271024: Implement macOS Metal Rendering Pipeline

[Kevin Rushforth]

On Tue, 4 Nov 2025 12:01:26 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

> Backport metal implementation to jfx25u.
> The backport is nearly clean with only one conflict that: The file `modules/javafx.graphics/src/main/java/com/sun/glass/ui/headless/HeadlessView.java` is not present in jfx25u.
> No issues observed with build and test.

Yes. I expect metal will be off by default for the lifetime of 25u, but will be there if Apple ends up removing OpenGL sooner than expected.

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PR Comment: https://git.openjdk.org/jfx25u/pull/30#issuecomment-3486159264