.TH FBI 1 "(c) 1999-2004 Gerd Knorr" "FBI 2.07" "Linux framebuffer imageviewer"
\#
\#
.SH NAME
fbi - Linux framebuffer imageviewer
\#
\#
.SH SYNOPSIS
\fBfbi\fP [\fIoptions\fP] \fIfile ...\fP
\#
\#
.SH DESCRIPTION
.BR fbi
displays the specified file(s) on the linux console using the
framebuffer device.
\fIPhotoCD\fP, \fIjpeg\fP, \fIppm\fP, \fIgif\fP, \fItiff\fP, \fIxwd\fP,
\fIbmp\fP, \fIpng\fP and \fIwebp\fP are supported directly.
For other formats
.BR fbi
tries to use
.BR ImageMagick (1)
\'s
.BR convert (1).
\#
\#
.SH OPTIONS
.TP
.B -h, --help
Print usage info.
.TP
.B -V, --version
Print \fBfbi\fP version number.
.TP
.B --store
Write command line arguments to config file.
.TP
.BI "-l" "\ file" ", --list" "\ file"
Read image filelist from \fIfile\fP.
.TP
.B -P, --text
Enable textreading mode.
This has the effect that
.BR fbi
will display large images without vertical offset (default is to center
the images).
Space 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 text pages, all you have to do to
get the next piece of text is to press space...
.TP
.B -a, --autozoom
Enable autozoom.
.BR Fbi
will automagically pick a reasonable zoom factor when loading a new
image.
.TP
.B --(no)autoup
Like autozoom, but scale up only.
.TP
.B --(no)autodown
Like autozoom, but scale down only.
.TP
.B --(no)fitwidth
Use width only for autoscaling.
.TP
.B -v, --(no)verbose
Be verbose: enable status line on the bottom of the screen.
.TP
.B -u, --(no)random
Randomize the order of the filenames.
.TP
.B --(no)comments
Display comment tags (if present) instead of the filename.
Probably only useful if you added reasonable comments yourself (using
.BR wrjpgcom (1)
for example), otherwise you likely just find texts pointing to the
software which created the image.
.TP
.B -e, --(no)edit
Enable editing commands.
.TP
.B --(no)backup
Create backup files (when editing images).
.TP
.B -p, --(no)preserve
Preserve timestamps (when editing images).
.TP
.B --(no)readahead
Read ahead images into cache.
.TP
.BI "--cachemem" "\ size"
Image cache \fIsize\fP in megabytes (MB).
.TP
.BI "--blend" "\ time"
Image blend \fItime\fP in miliseconds.
.TP
.BI "-T" "\ <arg>" ", --vt" "\ <arg>
Start on virtual console \fI<arg>\fP.
.TP
.BI "-s" "\ steps" ", --scroll" "\ steps"
Set scroll \fIsteps\fP in pixels (default is 50).
.TP
.BI "-t" "\ sec" ", --timeout" "\ sec"
Load next image after \fIsec\fP seconds without any keypress (i.e. slideshow).
.TP
.B -1, --(no)once
Don't loop (only use with \fB-t\fP).
.TP
.BI "-r" "\ n" ", --resolution" "\ n"
Select resolution, \fIn = 1..5\fP (only \fIPhotoCD\fP).
.TP
.BI "-g" "\ n" ", --gamma" "\ n"
Gamma correction. Default is 1.0. Requires \fIPseudocolor\fP or
\fIDirectcolor\fP visual, doesn't work for \fITruecolor\fP.
.TP
.BI "-f" "\ <arg>" ", --font" "\ <arg>"
Set font. This can be anything fontconfig accepts (see
.BR fonts-conf (5)
). Try
.BR 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.
.TP
.BI "-d" "\ fbdevice" ", --device" "\ fbdevice"
Use \fIfbdevice\fP framebuffer.
Default is the one your vc is mapped to.
.TP
.BI "-m" "\ videomode" ", --mode" "\ videomode"
Name of the video mode to use (video mode must be listed in
\fI/etc/fb.modes\fP).
Default is not to change the video mode.
\#
\#
.SH ENVIRONMENT
.BR Fbi
uses the following environment variables:
.TP
.BR FBGAMMA
This variable may be used to specify a default gamma correction.
\#
\#
.SH "COMMAND USAGE"
The commands take effect immediately; it is not necessary to type a
carriage return.
.PP
In the following commands, \fIi\fP is a numerical argument.
.SS Scrolling
.TP
\fBLEFT_ARROW\fP, \fBRIGHT_ARROW\fP, \fBUP_ARROW\fP, \fBDOWN_ARROW\fP
Scroll large images.
.TP
\fBPREV_SCREEN\fP
Previous image.
.TP
\fBNEXT_SCREEN\fP, \fBSPACE\fP
Next image.
.TP
\fBRETURN\fP
Write the filename of the current image to
.BR stdout (3)
, then go to the next image.
.TP
\fIi\fP\fBg\fP
Jump to image #\fIi\fP.
.TP
\fBp\fP
Pause the slideshow (if started with \fB-t\fP, toggle).
.P
The \fBRETURN\fP vs. \fBSPACE\fP key thing can be used to create a file
list while reviewing the images and use the list for batch processing
later on:
.P
.in +4n
\fIfbi\ file1.gif\ file2.jpg\ file3.jpg >\ fileimagelist.lst\fP
.in
.P
.in +4n
some \fBRETURN\fP and \fBSPACE\fP...
.P
.in +4n
\fIfbi\ -l\ fileimagelist.lst\fP
.in
.SS Zoom
.TP
\fB+\fP
In.
.TP
\fB-\fP
Out.
.TP
\fIi\fP\fBs\fP
Set zoom to \fIi\fP%.
.SS Other
.TP
\fBESQ\fP, \fBq\fP
Quit.
.TP
\fBv\fP
Toggle status line.
.TP
\fBh\fP
Display textbox with brief help.
.TP
\fBi\fP
Display textbox with some EXIF \fIEXIF\fP info.
.SS Edit mode
.BR Fbi
also provides some very basic image editing facilities.
You have to start
.BR fbi
with the \fI-e\fP switch to use them.
.TP
\fBD\fP
Delete image.
.TP
\fBr\fP
Rotate 90 degrees clockwise.
.TP
\fBl\fP
Rotate 90 degrees counter-clock wise.
.P
The delete function actually wants a capital letter 'D', thus you have
to type \fBShift+d\fP.
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.
.P
The rotate function actually works for \fIJPEG\fP images only.
It does a lossless transformation of the image.
\#
\#
.SH BUGS
.BR fbi
needs rw access to the framebuffer devices (\fI/dev/fbN\fP), i.e you (our
your admin) have to make sure
.BR fbi
can open the devices in rw mode.
The IMHO most elegant way is to use
.BR 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.
.P
.BR Fbi
also needs access to the linux console (\fI/dev/ttyN\fP) for sane
console switch handling.
That is obviously no problem for console logins, but any kind of a
pseudo tty (xterm, ssh, screen, ...) will \fBnot\fP work.
\#
\#
.SH AUTHOR
Gerd Knorr
.BR <kraxel@bytesex.org>
\#
\#
.SH "SEE ALSO"
.BR convert (1),
.BR fbset (1),
.BR fc-list (1),
.BR imagemagick (1),
.BR wrjpgcom (1),
.BR fonts-conf (5),
.BR PAM (7)
\#
\#
.SH COPYRIGHT
Copyright (c) 1999-2004 Gerd Knorr <kraxel@bytesex.org>
.P
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.
.P
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.
.P
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.