HP c3700 - Workstation Administration Manual page 76

Graphics administration guide

Hide thumbs Also See for c3700 - Workstation:

Table of Contents

configuring X Windows on HP-UX (other graphics cards)

hp Fire GL-UX configuration hints

This may cause problems with some applications. Setting "CountTransI-

nOvlyVis" causes the server to reserve the transparent pixel index. In

this case, the server reports that 255 colormap entries are available for

allocation in the PseudoColor visual. This option may be useful to appli-

cations that depend on having 256 colormap entries available in depth 8

PseudoColor visuals. The transparent index value is configurable

through the "TransparentIndex0" device option. Setting this option will

change the transparent pixel value to 0 from the default of 255. This

option may be useful to applications that depend on the transparent

pixel value being 0.

HP Fire GL-UX Colormaps Hints

HP Fire GL-UX devices have a total of 5 hardware colormaps. One color-

map is reserved for gamma correction and is not directly available to X

clients. The remaining colormaps are available for clients to use. When

the default visual is in the overlay planes, one of the four available hard-

ware colormaps is reserved for the default colormap. This ensures that

clients using the default colormap never encounter technicolor.

The HP Fire GL-UX driver reports on the installation status of a total of

5 colormaps via the XListInstalledColormaps() API. Four of these corre-

spond to the actual state of the hardware color tables used with Pseudo-

Color visuals. Colormaps are installed in these hardware LUTs in

first-in, first-out order. The driver also keeps track of the last TrueColor

colormap installed via XInstallColormap() and includes this information

whenever queried. By definition, all TrueColor colormaps are always

installed.

Chapter 3

Table of Contents