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rasview(1NCARG)


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.



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