Posted by Matt.M on Apr 28, 2017; 8:19pm
URL: https://forum.jogamp.org/DefaultGraphicsConfiguration-cannot-be-cast-to-AWTGraphicsConfiguration-and-null-GLContext-tp4037906.html

Hey guys,

I'm having an issue with getting jogl to render inside of an add-on module for a Java WebStart based program. When I compile the program and run it as a standalone, everything works great, however when I try to add it to my project it doesn't seem to want to work properly.

There are 2 places I'm trying to render to, and each is giving me a separate issue. The first one is inside a web launched client it is giving me this error:

java.lang.ClassCastException: com.jogamp.nativewindow.DefaultGraphicsConfiguration cannot be cast to com.jogamp.nativewindow.awt.AWTGraphicsConfiguration
        at com.jogamp.opengl.awt.GLCanvas.chooseGraphicsConfiguration(GLCanvas.java:1560)
        at com.jogamp.opengl.awt.GLCanvas.addNotify(GLCanvas.java:611)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at com.jogamp.opengl.awt.GLJPanel.addNotify(GLJPanel.java:666)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at javax.swing.JRootPane.addNotify(Unknown Source)
        at java.awt.Container.addNotify(Unknown Source)
        at javax.swing.JComponent.addNotify(Unknown Source)
        at java.awt.Container.addImpl(Unknown Source)
        at javax.swing.JLayeredPane.addImpl(Unknown Source)
        at javax.swing.JDesktopPane.addImpl(Unknown Source)
        at com.inductiveautomation.factorypmi.application.VisionDesktop.addImpl(VisionDesktop.java:345)
        at java.awt.Container.add(Unknown Source)
        at com.inductiveautomation.factorypmi.application.VisionDesktop$RuntimeWindowOpener.openWindow(VisionDesktop.java:510)
        at com.inductiveautomation.factorypmi.application.VisionDesktop.openWindow(VisionDesktop.java:193)
        at com.inductiveautomation.factorypmi.application.VisionDesktop.openWindow(VisionDesktop.java:185)
        at com.inductiveautomation.factorypmi.application.script.builtin.NavUtilities$1.run(NavUtilities.java:210)
        at com.inductiveautomation.factorypmi.application.script.builtin.WindowUtilities.doGUIAction(WindowUtilities.java:815)
        at com.inductiveautomation.factorypmi.application.script.builtin.NavUtilities.swapWindow(NavUtilities.java:208)
        at com.inductiveautomation.factorypmi.application.script.builtin.NavUtilities.swapTo(NavUtilities.java:117)
        at com.inductiveautomation.factorypmi.application.script.builtin.NavUtilities.swapTo(NavUtilities.java:104)
        at com.inductiveautomation.factorypmi.application.components.tabstrip.PMITabStrip.setSelectedTab(PMITabStrip.java:491)
        at com.inductiveautomation.factorypmi.application.components.tabstrip.TabHolderPanel.mousePressed(TabHolderPanel.java:213)
        at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue$4.run(Unknown Source)
        at java.awt.EventQueue$4.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

I have found similar issues with this same exception, but none of the solutions are applicable or viable for my scenario. Most of them are about raspberry pi and Newt, or call for using Java 6, which I can't do in this case.

The second issue is in the designer, it doesn't even throw an exception, but after some digging I found out that the GLContext is not initializing. I can see the component, it shows up as a black rectangle that says its canvas instance name (canvas0, canvas1, etc) but my GLContext is null.

I have tried to have the program create a new GLContext with AutoDrawables generated by events at runtime, giving the application its own external window, putting it on its own thread and then doing both of the above to create a GLContext on that thread for that window and set it as current. No matter what I do, the GLContext is coming back null. Any suggestions?