Graphics Administration Guide (July 2008)

NOTE: When running xdpyinfo or calling the XGetVisualInfo() Xlib function,
some extra duplicate visuals may appear in the visual list. These extra visuals are
created on behalf of the OpenGL extension to X (GLX). If necessary, the extra
visuals can be disabled using the DisableGLxVisuals screen option. See the
“Disabling the GLX Visuals” section for more information.
supported screen options
The following screen options are supported:
• CountTransparentInOverlayVisual
• ImageTextViaBitMap
• EnableIncludeInferiorsFix
• DisableGlxVisuals
hp VISUALIZE-FXE configuration hints
overlay visuals and overlay transparency
HP VISUALIZE-FXE devices have two visuals in the overlay planes, both depth-8
PseudoColor. The first (default) overlay visual has 256 entries per colormap and no
transparency. The second overlay visual has 255 entries per colormap and supports
transparency.
To allow applications to determine which visuals are in the overlay planes, both overlay
visuals are listed in the SERVER_OVERLAY_VISUALS property attached to the root
window. The default overlay visual has a transparent type of “0” (None), while the
transparent overlay visual has a transparent type of “1” (TransparentPixel).
If you need an overlay colormap that supports transparency, create the colormap using
the visual that has transparency in its SERVER_OVERLAY_VISUALS property.
disabling the GLX visuals
The HP VISUALIZE-FXE products support the OpenGL extension to X (GLX). If HP
OpenGL is installed on an HP VISUALIZE-FXE system, then the GLX extension offers
new entry points for obtaining more information about X visuals. As part of offering
extended visual information, some extra X visuals appear in the X visual list. The extra
visuals are simply duplicates of visuals that would normally appear in the X visual
list. In case that the extra visuals cause problems with applications, a screen option can
be used to disable them.
To disable the GLX visuals, add the DisableGlxVisualsScreen Option to the X*screens
file.For example:
Screen /dev/crt/
ScreenOption
DisableGlxVisuals
46 configuring X server on HP-UX (HP Visualize-FXE)