RFR: 8257719: JFXPanel scene fails to render correctly on HiDPI after fix for JDK-8199592

[Kevin Rushforth]

On Tue, 8 Dec 2020 16:29:52 GMT, Jose Pereda <jpereda at openjdk.org> wrote:

> This PR fixes a regression introduced in [JDK-8199592](https://bugs.openjdk.java.net/browse/JDK-8199592), where scene initialization was moved after updating output scales. However, in case of embedded windows (used by `JFXPanel` or `FXCanvas`), the scene has to be initialized before.
> 
> A test has been included. Before applying the fix, the JFXPanel is rendered with a garbled image, and after the fix, the rendering is correct.

Looks good with one minor comment.

tests/system/src/test/java/test/robot/javafx/embed/swing/JFXPanelHiDPITest.java line 166:

> 164:     }
> 165: 
> 166: }

Minor: missing newline at end of file

-------------

Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.java.net/jfx/pull/364