Tech Source Raptor X Servers for Tru64 UNIX - Manual (Page 35)

Chapter 5 – Advanced Features
5-3
ideal for use with double buffering to clear the entire back buffer or to
clear select planes from the back buffer.
Flash Erase is available transparently through the
XFillRectangle
function. It is available to use for any rectangle
whose width spans the entire screen since the area to be cleared is
defined by scan lines. It is also available through the Multi-buffer and
Double-buffering Extensions when the back buffer is a cached
pixmap and the rectangular area to be cleared has a width equal to
the display width.
5.6 The 8+24 Simultaneous Visuals
The 8+24 mode supports 8-bit and 24-bit visuals simultaneously.
This mode is available on the Raptor 2500T-DL, Raptor 2100T, Raptor
1100T and Raptor GFX-8PD cards. By supporting the TrueColor (24-
bit) and PseudoColor (8-bit) visuals simultaneously, we can support
just about any kind of X client application. Besides, with 16 million
colors available, colormap flashing can be avoided. This mode also
allows you to implement a pseudo overlay where the 8-bit visual
overlays the 24-bit visual.
The default visual for this mode is PseudoColor. Please see Section
4.3.2 and 4.3.3 for a description on how to enable the 8+24 mode on
the Raptor cards.