[Native] Scaling issue on Windows 10 with HiDPI and Java 10

[jzy3d]

Chart is not scaled properly under Windows 10 with HiDPI monitors & Java 10-11 : chart get displayed half size on a corner for HiDPI windows stations on native charts (EmulGL is a very good portability workaround).

Cases

All rendering glitches under Windows 10 with an HiDPI monitor are below with a demo programs reference from jzy3d-tutorials.

Case 1 : half chart on screen

Happens for the following IPainterFactory

• AWT (SurfaceDemoAWT)
• AWTNewt (SurfaceDemoAWTNewt)
• SWTBridge (SurfaceDemoSWTBridge)

Case 2 : chart full screen but not using HiDPI capabilities

Chart are displayed on complete canvases but do not make use of HiDPI capabilities which makes the chart ugly relative to other applications displayed on the same monitor.

• Swing (SurfaceDemoSwing)

Case 3 : properly working

• SWT (SurfaceDemoSWT)

Workaround : use EmulGL

• AWT (SurfaceDemoEmulGL)

It turns out to be a known problem with the way the JVM supports HiDPI, which is discussed in JOGL forum.

Workarounds are proposed here.

[jzy3d]

I digged in the solutions and indeed noticed that the JVM flag does not fix the issue.

I have been however able to fix rendering by editing bundled_jre/bin/java.exe properties by mouse clicks. The configuration differed from the stackoverflow advice so I printed my screen for you to reproduce the steps. My screen are in french, but basically

1. Right click java.exe > Properties
2. Compatibilité / Compatibility
3. Modifier les paramètres PPP élevé (HiDPI setting) / Edit HiDPI settings
4. Remplacer le comportement de mise à l'échelle PPP élevée. Mise à l'échelle effectuée par : / Replace HiDPI settings. Scale with
   Choose : System or System (amélioré)
   On my computer default setting is "Application" and does not work.

[jzy3d]

Somebody suggested that fix by overriding the Camera object (interesting code is commented but highlighted in yellow)

[jzy3d]

You may use EmulGL instead of JOGL for rendering with Jzy3D. EmulGL is made to enhance charts portability across computers.

See links to examples in the readme.

[jzy3d]

Fix in progress here #235

[jzy3d]

Available in Maven repo under 2.0.1-SNAPSHOT version. Source code on master branch