Bug ID: JDK-8102122 HiDPI support will always create high resolution back buffers even when a window is moved to a normal DPI screen

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JDK 8
8Fixed

Technically, if we follow Apple's guidelines on retina display support, we should be dynamically choosing a pixel scale based on where the majority of a window is currently being displayed.  The first implementation of HiDPI for RT-24009, though, locks in the choice of pixel scaling for the Screen on which a View is currently displayed.  That choice will need to be made more dynamic for full support for Mac Retina systems.

With the fix for RT-32104, we now dynamically determine whether to render a scene at HiDPI or regular DPI depending on where it resides and the determination is made dynamically as the window is moved from display to display or as the resolutions are changed on a given display.
23-08-2013
Here is a video showing the effect: http://www.youtube.com/watch?v=lZkejeSz32U
29-03-2013
I've just pushed a fix for RT-27976 which updates the scale factor for the underlying layer automatically when it is changed in the native system (either the window is moved to another screen, or the screen's scale factor is changed). The view.getWindow().getScreen().getScale() should now always reflect the current scale factor for the view. In case Prism needs to perform some actions upon such a change, it can implement the Window.EventHandler.handleScreenChangedEvent() event handler in GlassWindowEventHandler.java. See Window.java in Glass for the specification for this event.
04-02-2013
I have filed RT-27976 to implement the necessary support for this feature on Glass side.
28-01-2013

Blocks :	JDK-8118342 - JVM crashes after display mode is changed from LoDPI to HiDPI (FX app with ImageView)
Blocks :	JDK-8101728 - Mac: handle moving windows to other screens
Blocks :	JDK-8101788 - Support for Hi-DPI displays
Relates :	JDK-8124960 - Oversized and incomplete components shown on osx 10.8.3 using jdk 1.8.0
Relates :	JDK-8123550 - Severe drawing issues when changing displays