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SHOWIMAGE(7)           Miscellaneous Information Manual           SHOWIMAGE(7)



NAME
       showimage - bitmap displayer, colormap changer

SYNOPSIS
       showimage [ option ] [ file ...  ]

DESCRIPTION
       Showimage  displays the bitmap contained in file in the top left corner
       of the current window.  It goes to the next file when any character  is
       typed, exiting when there are no more files.  The options, all of which
       require no file, are:

       -c     Load the standard Plan 9 colormap, if this is an 8-bit  display.
              The  standard  colormap takes the value of a pixel byte and uses
              the top 3 bits for red darkness, the next 3 bits for green dark-
              ness,  and the final 2 for blue darkness.  So 0 is white and 255
              is black.  Exceptions: pixels 85 and 170 are  intermediate  grey
              values, so that 2-bit-per-pixel grey scale images look right.

       -g     Load  the  colormap  with a linear grey scale, from 0 (white) to
              max (black).

       -r     Load the colormap with a  reverse  linear  grey  scale,  from  0
              (black) to max (white).

       -mmapfile
              Load  the colormap from the file mapfile.  See rgbpix(2) for the
              format.

       -d     Dump the current colormap to standard output in  the  format  of
              rgbpix(2).

FILES
       /lib/image
              Some sample pictures.

SOURCE
       /sys/src/cmd/showimage.c

SEE ALSO
       graphics(2), rgbpix(2), intro(9), getmap(9.1)



                                                                  SHOWIMAGE(7)