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 darkness, 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)