Folks,
OpenEV depends on OpenGL and we have had a mixture of experiences with the
quality of OpenGL drivers for different cards on the the various supported
platforms, including Windows.
While we have been able to "fallback" to using the Mesa software OpenGL
implementation on unix platforms for some time, we have till now been
dependent on the quality of the card vendors OpenGL implementation on
Windows NT.
Many drivers give the option to not use acceleration, falling back to the
Microsoft provided software mode. This is useful on systems where the
card drivers cause OpenEV to crash. However, some drivers, such as my own
ATI Xpert2000 under Windows NT, do not include any such option, and so till
now we have had no way of forcing software mode.
However, I have now compiled the Mesa3D library for Windows. If the resulting
OpenGL3D.dll file is placed ahead of the Windows NT provided OpenGL32.dll in
the path, it is possible to use mesa as a safe software mode. In the 1.0.0
OpenEV configuration this can generally be achieved by placing the mesa
OpenGL32.dll in the ...\OpenEV\bin directory. The DLL can be downloaded from:
ftp://openev.sourceforge.net/pub/OpenEV/mesa34_opengl.zip
In future releases I hope to automate this procedure.
Best regards,
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I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@...
light and sound - activate the windows | http://pobox.com/~warmerda
and watch the world go round - Rush | Geospatial Programmer for Rent
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