[fedora-java] Java OpenGL on FC4

[Anthony Green]

On Mon, 2005-08-15 at 19:00 -0700, John M. Gabriele wrote:
> [john at localhost ~/dev/java/JOGL_Example]$ ./MyTest
> Exception in thread "main" java.lang.LinkageError: unexpected exception during
> linking: net.java.games.jogl.GLCapabilities

Rebuild your code with -findirect-dispatch and it will work.  I guess we
always need to use -findirect-dispatch, perhaps because we're
implementing an interface that was built using that option. 

> [john at localhost ~/dev/java/JOGL_Example]$ echo $LD_LIBRARY_PATH
> /usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre/lib/i386
> 
> and running it actually brings up a window and draws something
> which is red and flickers a bit, but doesn't look like a triangle.

It's a triangle, although the flickering is really making it
unrecognizable.  If your test code used double buffering then all would
be good.

I don't know why the triangle is constantly being rerendered. Perhaps
this is normal behaviour.

> Here's the nasty-looking messages that come up in my terminal
> window:
> 
> [john at localhost ~/dev/java/JOGL_Example]$ gij -cp /usr/share/java/jogl.jar Test
> Init GL is net.java.games.jogl.impl.x11.X11GLImpl
> 
> (.:3155): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in
> cast to `GtkWidget'
> 
> (.:3155): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
> `GtkObject'
> 
> (.:3155): Gtk-CRITICAL **: gtk_widget_get_display: assertion `GTK_IS_WIDGET
> (widget)' failed
> Aborted

I don't get any of these messages.  Is your FC4 system up to date?

AG