Visuals Suppression - HP c3700 - Workstation Administration Manual

configuring X Windows on HP-UX (other graphics cards)
features
60
Option ìSuppressGlxVisualsî
. . .
EndSection
The user can also selectively "hide" classes of visuals. For example to
suppress all visuals that don't have an Alpha buffer and don't have Sten-
cil planes do:
Option ìSuppressGlxVisualsî
The options can be white space, ampersand (&), or comma (,) delimited,
and must be enclosed with a single pair of double quotes.
The following is a complete list of Glx visuals that may be suppressed
IsRgba – Suppress all visuals that are RGB (True Color).
IsCi – Suppress all visuals that are Color Indexed (Pseudo Color).
Alpha – Suppress all visuals that have Alpha planes.
NoAlpha – Suppress all visuals that don't have Alpha planes.
Back – Suppress all visuals that have a double buffer.
NoBack – Suppress all visuals that don't have a double buffer.
Accum - Suppress all visuals that have an accumulator.
NoAccum - Suppress all visuals that don't have an accumulator.
Depth - Suppress all visuals that have a Z (depth) buffer.
NoDepth - Suppress all visuals that don't have a Z (depth) buffer.
Stencil - Suppress all visuals that have Stencil planes.
NoStencil - Suppress all visuals that don't have Stencil planes.
Stereo - Suppress all visuals that have Stereo buffers.
NoStereo - Suppress all visuals that don't have Stereo buffers.
If an opposing pair of options is selected (for example, Stereo and
NoStereo) the suppress options will be ignored since selecting an
opposing pair would suppress all the visuals.

visuals suppression

This option can be used to hide whole classes of visuals. These can be
selected via the SuppressVisuals option in Screen section of the
XF86Config file. The visuals that can be suppressed are: PseudoColor
and TrueColor. If all visuals are suppressed and no default visual has
been selected, the X Server will exit with a fatal error. Also if a default
visual is defined, it overrides the suppression request. The example
below suppresses the PseudoColor visual. The options can be delimited
by white space, |, or ",".
Section ìScreenî
ìHideDuplicateGlxVisualsî
ìNoAlpha & NoStencilî
Chapter 3