Re: LWJGL and gcj

[Anders Dahlberg <dahlberg at lysator dot liu dot se>]

Hello
onsdag 25 maj 2005 08.25 skrev Anthony Green:
> LWJGL provides another OpenGL binding for java among other things (see
> lwjgl.org).  I was able to build it after a little jawt fixing (patch
> coming soon).
>
> Unfortunately it doesn't run.  They use a really nasty kludge that
> doesn't work with gcj.  For some reason,they require access to low-level
> graphics info in their java code.   The info they need isn't provided by
> the high-level interfaces available to normal programs (like in
> GraphicsDevice), so they use this trick to call methods on Sun's private
> subclasses.
>
> static int getScreenFromDevice(GraphicsDevice device) throws LWJGLException
> { try {
>     Method getScreen_method = device.getClass().getMethod("getScreen",
> null); Integer screen = (Integer)getScreen_method.invoke(device, null);
> return screen.intValue();
>  etc
>  etc
>
> They use this same trick to get a visualID from Sun's private
> GraphicsConfiguration subclass.
>
> We will either have to implement similar secret interfaces, or ask the
> LWJGL folks to change their ways (if that's even possible), or both.
>
> I don't plan on doing anything more with this right now.  This was just
> an FYI.

Is it ok if I repost this at the lwjgl.org forums? (Or maybe you could just 
post it there yourself? :)

> AG
/Anders

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