Commit 2549b294 authored by Committed by David Partyka
BUG:10621 Workaround for an nVidia bug in X11 indirect rendering mode.
The version reported by the driver in X11 indirect rendering mode is above what the driver can do (for example it tells it supports 2.1 (Xserver on GeForce 6800) or even 3.2 (Xserver on Quadro FX 3600M)) when it cannot actually support PBO (pixel buffer objects) which is core in 2.1. It does not advertise PBO as an extension. The workaround makes vtkOpenGLExtensionManager returns false in indirect mode for any requested OpenGL version, which let the algorithms to only tests against advertised extensions. It has been tested with nVidia driver 195.36.15 (shipped with Ubuntu 10.04).
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