CRX-48Z Device-Dependent Information

Supported Visuals

The following visuals are supported:

Class PseudoColor Depth 8 Layer Image - supports DBE and MBX hardware double-buffering
Class PseudoColor Depth 8 Layer Overlay - supports DBE and MBX software double-buffering
Class DirectColor Depth 24 Layer Image - supports DBE and MBX hardware double-buffering
Class TrueColor Depth 24 Layer Image - supports DBE and MBX hardware double-buffering

Supported Screen Options

The following Screen Options are supported:

CountTransparentInOverlayVisual
SwapBuffersOnVBlank
ImageTextViaBitMap
EnableIncludeInferiorsFix

CRX-48Z Transparent Overlay Visuals

The default number of colormap entries in the overlay visual for the CRX-48Z is 255. Entry 255 is excluded because its value is hard-coded to transparent (that is, show the image planes).

This may have the following two consequences for X11 applications running in the overlay planes (the default visual):

Clients attempting to allocate 256 entries do not have their request granted.
Clients requesting (via XAllocNamedColor) the rgb.txt value of Transparent are not returned entry 255.

This default behavior can be changed by setting the CountTransparentInOverlayVisual screen option.

When this option is enabled, the X server does the following:

Specifies that the overlay visual has 256 entries.
Creates the default colormap with entry 255 pre-allocated to Transparent. A client calling XAllocNamedColor for entry Transparent in the default colormap will be returned entry 255.
For all other colormaps, returns all 256 entries as allocable, but issues a warning message:
Warning: XCreateColormap is creating 256 entry cmaps in overlay visual. Though allocable, entry 255 is hard-coded to transparency.
This warning is issued once per server execution.

CRX-48Z Device-Dependent Information

Technical documentation

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Supported Visuals

Supported Screen Options

CRX-48Z Transparent Overlay Visuals