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With HP's implementation of OpenGL and the Visualize-FX
family of graphics devices, it is now possible to run HP's implementation
of OpenGL "stereo in a window" mode. Unlike previous HP stereo implementations,
"stereo in a window" affects only OpenGL windows that have been
created with "stereo capable" GLX
visuals. The remainder of the X11 screen is rendered in non-stereo
mode without any flickering or color artifacts. Following are the steps required to run HP's implementation
of OpenGL "stereo in a window" mode: Find out if your monitor is currently configured in a mode
that supports stereo. This can be done by running the command: export DISPLAY=myhost:x.y
/opt/graphics/OpenGL/contrib/xglinfo/xglinfo |
The output from xglinfo
lists the OpenGL capabilities of the specified X Display, and includes
all GLX visuals
that are supported. If one or more of the listed GLX
visuals are marked as stereo capable, then you can proceed to step
three. If none of the GLX
visuals support stereo, you will need to re-configure your monitor
to a configuration that supports stereo. Note that you can use the
"Monitor Configuration" component of SAM to re-configure you monitor,
or you can execute the following command: /opt/graphics/common/bin/setmon graphics device |
Note that graphics device is a
name such as "/dev/crt"
that is included on the Screen
line in the /etc/X11/X*screens
file for the X Server that you want to configure for stereo. The
setmon command
is interactive and will present you with the possible monitor configurations
allowable for the specified device. You should select one of the
configurations that is listed by setmon
as stereo capable. If none of the configurations indicate stereo
capability, then your graphics device cannot be used for OpenGL
stereo rendering. After successfully re-configuring your monitor, the X Server
will be restarted, and you can verify the availability of GLX stereo
visuals by running the xglinfo
command again. To select one of the stereo capable GLX
visuals through OpenGL, the GLX_STEREO
enumerated value should be passed to either glXChooseVisual()
or glXGetConfig().
Once a stereo visual has been selected, it can be used to create
a stereo window, and glDrawBuffer()
can then be called to utilize both the right and left buffers for
rendering stereo images.
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