Planar Dome Md2/PCI, Руководство по установке

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Using Visual Classes | 83
Using Visual Classes
A visual class (or visual) is the X Window System™ terminology
to describe the characteristics of a display. X defines the visual
classes listed in this table.
Static classes do not support the use of a modifiable
colormap, but the corresponding dynamic classes do.
PseudoColor
is the most common display type. Some
applications run only on displays with a
PseudoColor
default visual class. When the Md2/PCI board is connected
to a grayscale monitor, you can configure it to emulate
PseudoColor
for applications by invoking the X Window
System with
PseudoColor
as the default visual class.
Emulating a PseudoColor visual class
To start the X server using
PseudoColor
as the default visual
class, add
defclass PseudoColor
to the
openwin
command
and to the
Xservers
file.
For example, for a one-headed system using the Md2/PCI
board, type:
openwin -dev /dev/md2pci0.0 defclass PseudoColor
For a two-headed system using the Md2/PCI board, type:
openwin -dev /dev/md2pci0.0 defclass PseudoColor \
-dev /dev/md2pci0.1 defclass PseudoColor
Static Class Dynamic Class
• StaticGray • GrayScale
• StaticColor • PseudoColor
• TrueColor • DirectColor
When connected to a grayscale monitor, the Md2/PCI
board has a default visual class of
GrayScale
.