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.\" $Header: /var/lib/cvsd/repos/research/researchv9/X11/src/X.V11R1/server/ddx/qdss/Xqdss.man,v 1.1.1.1 2018/04/24 17:22:00 root Exp $
.TH XQDSS 8 "12 September 1987" "X Version 11"
.SH NAME
Xqdss - X window system VAXStation II/GPX
.SH DESCRIPTION
.PP
The QDSS hardware in the VAXStation II/GPX supports 8 plane or 4 plane
displays.
.PP
.SH OPTIONS
.br
\fB-bp\fP \fIpixel-value\fP	set default black-pixel color
.br
\fB-wp\fP \fIpixel-value\fP	set default white-pixel color
.sp
The server also takes all of the standard server options (See X(8)
for a complete list.)
.PP
.SH NOTE
You need to make sure your kernel is configured with DMA_BUFSIZ
set to 10 in sys/data/qd_data.c, or things won't work right.
.PP
.SH BUGS
.PP
Currently only numeric arguments from #000000 to #ffffff are
accepted for default BlackPixel and WhitePixel, and no screen 
number is accepted.
.PP
The GPX hardware contains a polygon edge address generation engine
which does not conform to the polygon edge
model specified in the X11 protocol document.
The effect is that GPX polygon edges extend on average
one-half pixel farther out than they ought.
.PP
Zero-width dashed lines could be made faster by using the qdss hardware.
.PP
Text output uses hardare capabilities only for solid fill and 8-bit
character encodings and so other fill styles and encodings are slow.
.PP
Clipping to a bitmap is implemented by converting the bitmap
to a list of rectangles, which is slow for complex bitmaps.
.PP
Known to dump core on some GetImage requests.
.SH "SEE ALSO"
.PP
.IR X (8)
.IR X (1)
.IR `Xlib - C Language X Interface'
.IR `ddX - Device Dependent X Interface'
.SH AUTHORS
.PP
Donald Mullis and Matt Pappas, Digital Equipment Corporation.
.PP
Thanks to Ram Rao, Vasudev Bhandarkar and Mary Larsen of UEG for their 4-plane
code and numerous bug fixes.
.PP
.br
Copyright (c) 1984, 1985, 1986 by Massachusetts Institute of Technology.
Copyright (c) 1986, 1987 by Digital Equipment Corporation
.br
See X(1) for a complete Copyright notice.

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