Error in attaching canvas to a Frame

OpenGL Development JOGL Development
#1

I have just started learning jogl and need some help.

Here is my code:


public class Test {
      
      static GLCapabilities gl_Capabilities = new GLCapabilities();
      
      public static void main(String[] args){
            
//            gl_Capabilities.setRedBits(8); 
//            gl_Capabilities.setBlueBits(8); 
//            gl_Capabilities.setGreenBits(8); 
//            gl_Capabilities.setAlphaBits(8); 


            GLCanvas gl_canvas = GLDrawableFactory.getFactory().createGLCanvas(gl_Capabilities);
            
            GLJPanel gl_panel = GLDrawableFactory.getFactory().createGLJPanel(gl_Capabilities,gl_canvas);
            
            Frame frame = new Frame();
            frame.add(gl_panel);
            
            frame.setVisible(true);
            frame.setSize(400,400);
            
      }

}

And whenever this is ran, i get this error:


net.java.games.jogl.GLException: Error creating offscreen bitmap
      at net.java.games.jogl.impl.windows.WindowsOffscreenGLContext.create(WindowsOffscreenGLContext.java:147)
      at net.java.games.jogl.impl.windows.WindowsGLContext.makeCurrent(WindowsGLContext.java:117)
      at net.java.games.jogl.impl.windows.WindowsOffscreenGLContext.makeCurrent(WindowsOffscreenGLContext.java:116)
      at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)
      at net.java.games.jogl.GLJPanel.reshape(GLJPanel.java:131)
      at java.awt.Component.setBounds(Unknown Source)
      at java.awt.BorderLayout.layoutContainer(Unknown Source)
      at java.awt.Container.layout(Unknown Source)
      at java.awt.Container.doLayout(Unknown Source)
      at java.awt.Container.validateTree(Unknown Source)
      at java.awt.Container.validate(Unknown Source)
      at java.awt.Window.show(Unknown Source)
      at java.awt.Component.show(Unknown Source)
      at java.awt.Component.setVisible(Unknown Source)
      at Test.main(JoglFrame.java:45)

Line 45: frame.add(gl_panel);

Can someone tell me what is occurring?

Thanks,

Zak

#2

Some quick question so that the pro’s ;D can help you better:

1, Do you have a 3d card? :wink:
2, Do you use windows xp with default drivers? (if so, update as windows don’t provide opengl support)
3, Do you use linux without native (nvidia,ati etc) drivers?

These above are maybe not your problem - but easier to get them answered directly, so that it’s easier to solve the real problem later :slight_smile:

#3

[quote]1, Do you have a 3d card?
[/quote]
Yes, I am using a Nvidia Quadro4 900 XGL video card.

[quote]2, Do you use windows xp with default drivers? (if so, update as windows don’t provide opengl support)
[/quote]
I am running Windows XP with the Nvidia latest drivers.

[quote]3, Do you use linux without native (nvidia,ati etc) drivers?
[/quote]
I am currently not using Linux as my OS.

Thanks

Zak

#4

Zak,

I can’t get your code fragment to compile. I suggest taking a look at the gears demo and start with it as your framework.

#5

If I add your gl_Canvas to the Frame directly and kick the GlJPanel, it works.
I didn’t know it’s cool to add a JPanel to an AWT Canvas anyway. :slight_smile:

Maybe the mixing of OpenGL AWT and Swing components ist the problem here (not the general mixing of AWT and Swing, but with OpenGL ) ?
I once encountered problems when I tried to use an AWT GlCanvas inside a Swing JFrame… however adding Swing components next to my GlCanvas inside an AWT Frame works fine.

http://jogl.dev.java.net/unbranded-source/browse/checkout/jogl/doc/userguide/index.html?rev=1.2
“(…) Jogl provides two basic widgets into which OpenGL rendering can be performed. The GLCanvas is a heavyweight AWT widget which supports hardware acceleration and which is intended to be the primary widget used by applications. The GLJPanel is a fully Swing-compatible lightweight widget which currently does not support hardware acceleration but which is intended to provide 100% correct Swing integration in the rare circumstances where a GLCanvas can not be used. See this article on The Swing Connection for more information about mixing lightweight and heavyweight widgets. (…)”

If you can live with “just” the GlCanvas I’d stick with this. Works great here (inside an AWT Frame).

#6

The intention of GLJPanel is to be used in Swing. Try creating a GLCanvas or putting your GLJPanel into a JFrame and see if that helps.