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.help gdevices Apr92 plot
.ih
NAME
gdevices -- list available imaging or other graphics devices
.ih
USAGE
gdevices
.ih
PARAMETERS
.ls devices = "^imt"
A list of patterns identifying the class of devices for which information
is to be output. If multiple patterns are given they should be separated
by commas. The default pattern matches all stdimage (e.g. IMTOOL) devices.
.le
.ls graphcap = "graphcap"
The graphcap file to be scanned (any termcap format file will do). By default
the graphcap file specified by the graphcap environment variable, usually
"dev$graphcap", is scanned.
.le
.ih
DESCRIPTION
\fBgdevices\fR prints a table of the available devices in a given class of
devices, giving for each device a list of the aliases by which the device
is known, the imaging resolution in X and Y, and a short description of the
device (if present in the graphcap file entry).
By default \fIgdevices\fR lists the available stdimage devices as defined in
the active graphcap file, however, by manipulating the \fIdevices\fR and
\fIgraphcap\fR parameters any class of devices in any file can be listed.
.ih
EXAMPLES
1. List the available stdimage (e.g. IMTOOL or SAOIMAGE) devices.
.nf
cl> gdev
# ALIASES NX NY DESCRIPTION
imtx 512 512 Imtool display server
imt1 imt512 imtool 512 512 Imtool display server
imt2 imt800 800 800
imt3 imt1024 1024 1024
imt4 imt1600 1600 1600
imt5 imt2048 2048 2048
imt6 imt4096 4096 4096
(etc.)
.fi
2. List the available IMDKERN devices.
.nf
cl> gdev dev=imd
# ALIASES NX NY DESCRIPTION
imdblack imdbla imdB imdbl 2048 2048
imdwhite imdwhi imdW imdw 2048 2048
(etc.)
.fi
3. List the VMS graphics devices.
.nf
cl> gdev dev=VMS
# ALIASES NX NY DESCRIPTION
iism70v 512 512 NOAO Vela hosted IIS model
iism75 512 512 IIS model 75 image display
ui300 3130 2370 UNIX interface to the NOAO
vver 2112 1636 VMS generic interface to th
(etc.)
.fi
.ih
BUGS
The method used to extract device entries involves multiple scans of the
graphcap file hence is not very efficient.
.ih
SEE ALSO
system.devices, dev$graphcap
.endhelp
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