Tech Source GFX 400 Series - Manual (Page 33)

5-1
Chapter 5
ADVANCED FEATURES
5.1 Overview
The GFX 400 card has several advanced features available
through the X Server. They are:
•
8+24-bit simultaneous visuals
•
Off-screen pixmap caching
•
OpenGL support via Sun’s DPA extension
5.2 8+24 Simultaneous Visuals
The 8+24 mode simultaneously supports 8 and 24-bit visuals.
This addresses the classic colormap flashing issue with a 24-bit
visual while providing the 8-bit visual that is required by some
legacy applications, such as SoftWindows.
The available visuals are PseudoColor and TrueColor.
PseudoColor is the default visual.
5.3 Cached Pixmaps
All GFX 400 Series cards support off-screen pixmap caching.
Cached pixmaps are those that are stored in the off-screen
memory. These off-screen pixmaps allow faster transfer rates to
and from on-screen windows.
The available off-screen memory depends on the amount of
video memory, the current resolution, and depth settings. For
example, consider the GFX 450 card, which has 32MB of video
memory.