Graphics Administration Guide (October 2009)

Shared memory XImages are essentially a version of the XImage interface where the actual image
data is stored in a shared memory segment, and thus need not be moved through the Xlib
interprocess communication channel. For large images, use of this facility can result in increased
performance.
Shared memory pixmaps are a similar concept implemented for the pixmap interface. Shared
memory pixmaps are two-dimensional arrays of pixels in a format specified by the X Server,
where the pixmap data is stored in the shared memory segment. In all other respects, shared
memory pixmaps behave the same as ordinary pixmaps and can be modified by the usual Xlib
routines. In addition, it is possible to change the contents of these pixmaps directly without the
use of Xlib routines merely by modifying the pixmap data.
hp Visualize-FXE device-dependent information
This section includes information on the HP VISUALIZE-FXE graphics devices.
The HP VISUALIZE-FXE has 8 overlay planes, 48 image planes a 24-bit z buffer and 4 hardware
colormaps.
HP VISUALIZE-FXE graphics devices contain 2D hardware acceleration as well as 3D acceleration
for lighting, shading and texture mapping.
supported visuals
HP VISUALIZE-FXE graphics devices support all of the following visuals:
• Class PseudoColor Depth 8 Layer Image
• Class PseudoColor Depth 8 Layer Overlay
• Class PseudoColor Depth8 Layer Overlay Transparent
• Class DirectColor Depth 24 Layer Image
• Class TrueColor Depth 24 Layer Image
The following visuals are enabled by default on the HP VISUALIZE-FXE:
• Class PseudoColor Depth 8 Layer Image
supports DBE hardware double-buffering
• Class PseudoColor Depth 8 Layer Overlay
supports DBE software double-buffering
• Class PseudoColor Depth 8 Layer Overlay Transparent supports DBE software
double-buffering
• Class DirectColor Depth 24 Layer Image
does not support DBE hardware or software double-buffering
• Class TrueColor Depth 24 Layer Image
does not support DBE hardware or software double-buffering
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
hp Visualize-FXE device-dependent information 37