使用Java 7的Linux上的立体声问题-将组件添加到父组件后如何更改其GC

Question

I have an AWT canvas contained within a JPanel and displayed on screen. I currently use Java 7 update 45 and run on Red Hat 6.

When the user requests an openGL stereo capable canvas, i remove the existing canvas, create a new canvas that chooses a stereo visual and sets the appropriate GraphicsConfiguration on the canvas. The problem is, with new changes made in Java 7, when this canvas is added back to the JPanel, the GraphicsConfiguration(GC) of the Jpanel overwrites the GraphicsConfiguration of the Canvas.

This happens in java.awt.Container.addImpl() where it calls the package scoped method Component.setGraphicsConfiguration() .

I am currently using Reflection on this package scoped method to call the method from my code and change the GC on the canvas.

Is there any better solution than this ? In other words, how to change the GC of a component after it has been added to a parent ?

Answer 1

I suggest you do not change the GC at all. Instead just try to create a stereo capable GC and allow fallback to non-stereoscopic GC. If that succeeds enable the stereoscopic rendering path and menu entries.

Answer 2

The Stereoscopic regression caused by the JDK 7 AWT changes is reported in and worked on in the following bugreport: https://bugs.openjdk.java.net/browse/JDK-8036875 - Component.setGraphicsConfiguration() breaks some 3D applications

A workaround made by "babor" for Java3D Canvas3D users is to override the Canvas3D hierarchyChanged method and update the topmost component using reflection to use the stereoscopic graphics configuration. http://forum.jogamp.org/Java3D-stereo-tp4029914p4031792.html