rendering stops after first frame

[GKW]

For anyone who is interested the problem is at the start of invokeGL in the following code:

if (!isRealized() ||
   willSetRenderingThread ||
   (renderingThread != null &&
    renderingThread != currentThread)) {

On my nvidia machine where the ATI workaround works the following is happening:

!isRealized: false
willSetRenderingThread: false
renderingThread != null: false
renderingThread != currentThread: true


On my ATI machine where the workaround does not work looks like this:

!isRealized: false
willSetRenderingThread: false
renderingThread != null: true
renderingThread != currentThread: true


This means that invokeGL is returning before any rendering can occure.

[Ken Russell]

I just emailed GKW privately about this issue but I think there is probably a race condition in the auto-detection of the ATI_WORKAROUND flag. If you specify -DATI_WORKAROUND=true or -DATI_WORKAROUND=false, it should have different behavior than leaving the system property unspecified. The issue is that the component's rendering thread is being specified before it is detected that the single-threaded workaround should take effect, so when the workaround kicks in the context is already current on another thread. I'll need to think about this some more. Hopefully GKW's fix for the other bug (needing to manually create a dummy OpenGL context) can be used to fix this as well, by finding the GL_VENDOR of the dummy context.

[turquoise3232]

I just emailed GKW privately about this issue but I think there is probably a race condition in the auto-detection of the ATI_WORKAROUND flag. If you specify -DATI_WORKAROUND=true or -DATI_WORKAROUND=false, it should have different behavior than leaving the system property unspecified.

I've just upgraded to jogl1.1b04 and my ATI 9700 really prefer me to put a -DATI_WORKAROUND=true rather than leaving it unspecified! So Ken you may be right!

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[GKW]

We think we found the problem.  Hopefully the next release will be rock solid for everyone.