FBZOOM(1)

NAME
fbzoom - modify zoom and window parameters of a frame buffer

SYNOPSIS

fbzoom [-T] [-F frame_buffer] [-s|S image_sqrsize] [-w|W image_width] [-n|N image_height]

DESCRIPTION

Using vi(1) and/or emacs(1) -like keystrokes, fbzoom allows interactive zooming and panning of a frame buffer. Using the optional command line arguments,

-T
    toggles the sense of the pan commands.

-F frame_buffer
    explicitly specifies the frame buffer. Otherwise, the environment variable FB_FILE specifies the current framebuffer; see brlcad(1).

-s (or -S) image_sqrsize
    displays the image file as a square, image_sqrsize pixels per side (default is 512x512).

-w (or -W) image_width
    displays the image image_width pixels wide (default is 512).

-n (or -N) image_height
    displays the image image_height pixels high (default is 512).

fbzoom will display the image currently in the frame buffer and then act on commands entered by the user. Available commands are:

b ^V
    zoom Bigger (*2)

s
    zoom Smaller (*0.5)

+
    zoom Bigger (+1)

-
    zoom Smaller (-1)

h B
    pan Left (1)

j N
    pan Down (1)

k P
    pan Up (1)

l F
    pan Right (1)

H ^B
    pan Left (many)

J ^N
    pan Down (many)

K ^P
    pan Up (many)

L ^F
    pan Right (many)

T
    toggle sense of pan commands

c
    goto Center

z
    zoom 1 1

r
    Reset to normal

q
    Exit

RETURN
    Exit

Note that these commands change the way the frame buffer is viewed but not the image in the frame buffer.

SEE ALSO

bw-fb(1), gif-fb(1), pix-fb(1), plot3-fb(1), rle-fb(1)

AUTHOR

BRL-CAD Team

COPYRIGHT

This software is Copyright (c) 1986-2021 by the United States Government as represented by U.S. Army Research Laboratory.

BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org