fbi - Linux framebuffer imageviewer

       Gerd Hoffmann <gerd@kraxel.org>

Fbi needs rw access to the framebuffer devices (/dev/fbN), i.e you (our your admin) have to make sure fbi
       can  open  the devices in rw mode. The IMHO most elegant way is to use PAM(7) to chown the devices to the
       user logged in on the console. Another way is to create some group, chown the special files to that group
       and put the users which are allowed to use the framebuffer device into the group. You can also  make  the
       special  files  world  writable,  but be aware of the security implications this has. On a private box it
       might be fine to handle it this way though.

       Fbi also needs access to the linux  console  (/dev/ttyN)  for  sane  console  switch  handling.  That  is
       obviously  no problem for console logins, but any kind of a pseudo tty (xterm, ssh, screen, ...) will not
       work.

       The commands take effect immediately; it is not necessary to type a carriage return.

       In the following commands, i is a numerical argument.

   ScrollingLEFT_ARROW, RIGHT_ARROW, UP_ARROW, DOWN_ARROW
              Scroll large images.

       PREV_SCREEN, k
              Previous image.

       NEXT_SCREEN, SPACE, j
              Next image.

       ig     Jump to image #i.

       RETURN Write the filename of the current image to stdout(3), then go to the next image.

       The  RETURN  vs. SPACE key thing can be used to create a file list while reviewing the images and use the
       list for batch processing later on:

           fbifile1.giffile2.jpgfile3.jpg>fileimagelist.lst

           some RETURN and SPACE...

           fbi-lfileimagelist.lstZooma      Autozoom.

       +      In.

       -      Out.

       is     Set zoom to i%.

   OtherESQ, q Quit.

       v      Toggle status line.

       h      Display textbox with brief help.

       i      Display textbox with some EXIF info.

       p      Pause the slideshow (if started with -t, toggle).

   EditmodeFbi also provides some very basic image editing facilities. You have to start fbi with the -e  switch  to
       use them.

       D, Shift+d
              Delete image.

       r      Rotate 90 degrees clockwise.

       l      Rotate 90 degrees counter-clock wise.

       x      Mirror image vertically (top / bottom).

       y      Mirror image horizontally (left to right).

       The  delete  function  actually  wants a capital letter D, thus you have to type Shift+d. This is done to
       avoid deleting images by mistake because there are no safety bells: If you ask fbi to delete  the  image,
       it will be deleted without questions asked.

       The rotate function actually works for JPEG images only. It does a lossless transformation of the image.

       Copyright (c) 1999-2012 Gerd Hoffmann <gerd@kraxel.org>

       This program is free software; you can redistribute it and/or modify  it  under  the  terms  of  the  GNU
       General  Public License as published by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY  WARRANTY;  without  even
       the  implied  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
       License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not,  write
       to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

FBI 2.09                                   (c) 1998-2012 Gerd Hoffmann                                    FBI(1)

Fbi displays the specified file(s) on the linux console using the framebuffer device. PhotoCD, jpeg, ppm,
       gif,  tiff,  xpm,  xwd,  bmp,  png  and  webp  formats are supported natively. For other fbi tries to use
       ImageMagick(1)´s convert(1).

Fbi uses the following environment variables:

       FBGAMMA
              This variable may be used to specify a default gamma correction.

       fbi - Linux framebuffer imageviewer

-h,--help
              Print usage info.

       -V,--version
              Print fbi version number.

       --store
              Write command line arguments to config file ~/.fbirc.

       -lfile,--listfile
              Read image filelist from file.

       -P,--text
              Enable textreading mode. In this mode fbi  will  display  large  images  without  vertical  offset
              (default  is  to center the images). The SPACE command will first try to scroll down and go to the
              next image only if it is already on the bottom of the page. Useful if the images you are  watching
              are text pages, all you have to do to get the next piece of text is to press space...

       -a,--autozoom
              Enable autozoom.  Fbi will automagically pick a reasonable zoom factor when loading a new image.

       --(no)autoup
              Like autozoom, but scale up only.

       --(no)autodown
              Like autozoom, but scale down only.

       --(no)fitwidth
              Use width only for autoscaling.

       -v,--(no)verbose
              Be verbose: enable status line on the bottom of the screen (enabled by default).

       -u,--(no)random
              Randomize the order of the filenames.

       --(no)comments
              Display  comment  tags  (if  present)  instead  of the filename. Probably only useful if you added
              reasonable comments yourself (using wrjpgcom(1) for example), otherwise you likely just find texts
              pointing to the software which created the image.

       -e,--(no)edit
              Enable editing commands.

       --(no)backup
              Create backup files (when editing images).

       -p,--(no)preserve
              Preserve timestamps (when editing images).

       --(no)readahead
              Read ahead images into cache.

       --cachememsize
              Image cache size in megabytes (default is 256).

       --blendtime
              Image blend time in miliseconds.

       -Tn,--vtn
              Start on virtual console n.

       -ssteps,--scrollsteps
              Set scroll steps in pixels (default is 50).

       -tsec,--timeoutsec
              Start a continuous slideshow where each image is  loaded  at  sec  second  intervals  without  any
              keypress.

       -1,--(no)once
              Don't loop (only use with -t).

       -rn,--resolutionn
              Select resolution, n=1..5 (default is 3, only PhotoCD).

       -gn,--gamman
              Gamma  correction. Requires Pseudocolor or Directcolor visual, doesn't work for Truecolor (default
              is 1).

       -f<arg>,--font<arg>
              Set font. This <arg> can be anything fontconfig accepts (see fonts-conf(5)).  Try fc-list(1) for a
              list of known fonts on your system. The fontconfig config  file  is  evaluated  as  well,  so  any
              generic  stuff  defined  there  (such  as  mono, sans) will work as well. It is recommended to use
              monospaced fonts, the textboxes (help text, exif info) look better then.

       -d/dev/fbN,--device/dev/fbN
              Use /dev/fbN device framebuffer. Default is the one your virtual console is mapped to.

       -mvideomode,--modevideomode
              Name of the video mode to use (video mode must be listed in  /etc/fb.modes).  Default  is  not  to
              change the video mode.

convert(1), fbset(1), fc-list(1), imagemagick(1), wrjpgcom(1), fonts-conf(5), PAM(7)

fbi [options] file...