GLJPanel resizing stack trace problem with current version of JOGL

OpenGL Development JOGL Development
#1

Does anyone have a fix for resizing the GLJPanel? A GLException occurs when the PBuffer needs to be resized.

This can be reproduced by running the JGears from jogamp.org source code samples.

Exception in thread “AWT-EventQueue-0” javax.media.opengl.GLException: GLEventListener Gears@ed42d08 already initialized
: AWT-GLJPanel[ com.jogamp.opengl.impl.GLPbufferImpl, GLEventListeners num 1 [Gears@ed42d08[init true], ]]
at com.jogamp.opengl.impl.GLDrawableHelper.init(GLDrawableHelper.java:125)
at javax.media.opengl.awt.GLJPanel$Updater.init(GLJPanel.java:582)
at com.jogamp.opengl.impl.GLDrawableHelper.init(GLDrawableHelper.java:111)
at com.jogamp.opengl.impl.GLDrawableHelper.init(GLDrawableHelper.java:124)
at com.jogamp.opengl.impl.GLPbufferImpl$InitAction.run(GLPbufferImpl.java:303)
at com.jogamp.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:273)
at com.jogamp.opengl.impl.GLPbufferImpl.maybeDoSingleThreadedWorkaround(GLPbufferImpl.java:296)
at com.jogamp.opengl.impl.GLPbufferImpl.display(GLPbufferImpl.java:120)
at javax.media.opengl.awt.GLJPanel$PbufferBackend.doPaintComponentImpl(GLJPanel.java:1143)
at javax.media.opengl.awt.GLJPanel$AbstractReadbackBackend.doPaintComponent(GLJPanel.java:914)
at javax.media.opengl.awt.GLJPanel.paintComponent(GLJPanel.java:306)
at JGears.paintComponent(JGears.java:58)
at javax.swing.JComponent.paint(JComponent.java:1027)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
…

The code is using GLCanvas for now, but the GLJPanel is attractive because it gets rid of a disorienting flashing behavior when switching between tabs in a JTabbedPane.

#2

Hi

I don’t reproduce this bug on machines supporting PBuffers. I’ll try again tomorrow.

#3

Hi!

I don’t reproduce your bug but I have a lot of other problems with GLJPanel now with JOGL 2 :frowning:

#4

To reproduce this error, the JFrame used in JGears.java was dragged to a size double the original.

Based on your reported results, it seems that using the GLJPanel in code should be avoided until a stable, well tested release is made.

#5

JOGL is well tested but some things are temporarily broken. GLJPanel works in some demos but not in my simple test case.