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Diffstat (limited to 'doc/userguide')
| -rw-r--r-- | doc/userguide/index.html | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/doc/userguide/index.html b/doc/userguide/index.html index 9bfe0caa4..a76b36b5c 100644 --- a/doc/userguide/index.html +++ b/doc/userguide/index.html @@ -846,7 +846,27 @@ hardware. <P> -No outstanding issues at this time. +Support has been added to the JOGL library for allowing multiple +threads to each have an OpenGL context current simultaneously, for +example to implement multi-head CAVE-like environments. Normally a +global AWT lock is held between calls to GLContext.makeCurrent() / +release() for on-screen heavyweight contexts (for example, those +associated with a Canvas or GLCanvas). We have found this to be +necessary for stability purposes on all supported X11 platforms, even +with relatively robust drivers such as those from NVidia. + +</P> +<P> + +To enable multiple GLContexts to be made current simultaneously on X11 +platforms, specify the command line argument +<CODE>-Djogl.GLContext.optimize</CODE> when starting the JVM. Note +that this may incur robustness problems, in particular when resizing +or moving windows. We have also found that ATI's proprietary drivers +do not work at all with this flag, apparently because they cause GLX +tokens to be sent to the X server for various GL calls even for direct +contexts. For this reason if the GLX vendor is ATI then this flag +currently has no effect. </P> |