Add method to save a JavaFX image to file without the use of SwingFXUtils?

[Frank Delporte]

Hello

My first contribution to this mailing list... ;-)

During an experiment with FXGL on the Raspberry Pi + Gluon JavaFX 17-ea, it turned out there was a missing dependency to javafx.swing.
(also mentioned here <https://stackoverflow.com/questions/50900945/swingfxutils-alternative-for-image-serialization-javafx-swing-raspberry-pi>)

Turns out SwingFXUtils was used in the FXGL library only to be able to save a screenshot of the application to a file and we were able to rework it as you can see here: <https://github.com/AlmasB/FXGL/commit/737c2ba44b9c3e89ed29137ebe7f978b10ac782b>

I researched this topic for a few hours, but didn't manage to find a good approach to save a JavaFX Image. Maybe I missed something? Or wouldn't it be a good idea to extend the JavaFX Image or BufferedImage with e.g. writeToFile(ImageFormat.PNG), writeToFile(ImageFormat.JPG)?

Best regards
Frank Delporte

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