NAME¶
rasview - Raster file previewer for the X Window System.
SYNOPSIS¶
rasview [
-toolkitoption ... ] [
-ifmt format
] [
-movie ] [
-pal palette_file ] [
-quiet ] [
-Version ] [
file.ext |
- ]
DESCRIPTION¶
rasview displays raster imagery from a file into an X window. By default
rasview determines the format of an image file by looking at its file name
extension. For example, an xwd (X11 Window Dump) file might be named
foo.xwd.
Raster image file formats come in a variety of flavors.
rasview attempts
to support 8-bit-indexed, and 24-bit-direct encodings of the image formats
listed below. Similarly, only output devices with 8-bit or 24-bit depth are
supported.
rasview attempts to select an X11 Visual which best matches
the encoding of the image file. A PseudoColor visual class is preferred for
8-bit-indexed imagery, while a DirectColor visual class is preferred for
24-bit-direct encoded imagery. In the case of 24-bit-direct encodings, if the
output device only has 8-bit color the imagery is color-quantized down to 8
bits.
In general raster files contain only a single image.
rasview is able to
display multiple-image raster files if they were created by the concatenation
of single-image files with the
rascat(1NCARG) utility or if they were
generated by
ctrans(1NCARG). Multi-frame image files generated by other
means are not guaranteed to be displayable by
rasview.
See
ras_formats(5NCARG) for a list of supported image formats.
OPTIONS¶
rasview accepts all of the standard X Toolkit command line options (see
X11(7)).
rasview also accepts the following options:
- -ifmt format
- Specify the input file format. format is one of the aforementioned
file name extensions (without the ".", e.g. xwd). When
this option is specified file name extensions are not necessary and are
ignored if present. All input files must have the same format.
- -movie
- Normally when processing multi-image raster files, rasview waits
for a mouse click before proceeding to the next frame. When this option is
used rasview immediately advances the frame after rasview
has completed drawing it.
- -pal palette_file
- Use the color palette contained in the file palette_file. for
displaying images. This palette will override the color palette stored
with the image.
- See ras_palette(5NCARG) for a description of palette file
forats.
- -quiet
- Operate in quiet mode.
- -Version
- Print the version number and then exit.
- -
- Read rasterfile from standard input (-ifmt option required).
SEE ALSO¶
ctrans(1NCARG),
rascat(1NCARG),
ras_formats(5NCARG),
ras_palette(5NCARG),
xwd(1),
xwud(1) X11(7)
Hardcopy: NCAR Graphics Fundamentals, UNIX Version
BUGS/CAVEATS¶
rasview does not respond to redraw events.
COPYRIGHT¶
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.