fbi.man

linux下开源图片codec

.TH fbi 1 "(c) 1999-2002 Gerd Knorr"
.SH NAME
fbi - linux \fBf\fPrame\fBb\fPuffer \fBi\fPmageviewer
.SH SYNOPSIS
.B fbi [ options ] file ...
.SH DESCRIPTION
.B fbi
displays the specified file(s) on the linux console using the
framebuffer device.  PhotoCD, jpeg, ppm, gif, tiff, xwd, bmp and png
are supported directly.  For other formats fbi tries to use
ImageMagick's convert.
.SH OPTIONS
.TP
.B -h
print usage info
.TP
.B -d device
framebuffer device to use.  Default is the one your vc is
mapped to.
.TP
.B -m mode
name of the video mode to use video mode (must be listed in
/etc/fb.modes).  Default is not to change the video mode.
.TP
.B -q
be quiet: don't print anything.
.TP
.B -v
be verbose: allways print filenames.
.TP
.B -P
Enable textreading mode.  This has the effect that 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 -t sec
timeout: load next image after >sec< seconds without any
keypress
.TP
.B -g gamma
gamma correction.  Can also be put into the FBGAMMA environment
variable.  Default is 1.0.  Requires Pseudocolor or Directcolor
visual, doesn't work for Truecolor.
.TP
.B -r n
select resolution.  PhotoCD only, n = 1..5.
.TP
.B -s n
set scroll steps in pixels (default is 50).
.TP
.B -f font
Set font.  This can be either a pcf console font file or a X11 font
spec.  Using X11 fonts requires a font server (The one specified in
the environment variable FONTSERVER or on localhost).  The FBFONT
environment variable is used as default.  If unset, fbi will
fallback to 10x20 (X11) / lat1u-16.psf (console).
.TP
.B -a
Enable autozoom.  fbi will automagically pick a reasonable zoom factor
when loading a new image.
.TP
.B --autoup
Like autozoom, but scale up only.
.TP
.B --autodown
Like autozoom, but scale down only.
.TP
.B -u
Randomize the order of the filenames.
.TP
.B -e
Enable editing commands.
.TP
.B -b
create backup files (when editing images).
.TP
.B -p
preserve timestamps (when editing images).
.TP
.B --comments
Display comment tags (if present) instead of the filename.  Probaby
only useful if you added reasonable comments yourself (using wrjpgcom
for example), otherwise you likely just find texts pointing to the
software which created the image.
.SH KEYS
.nf
cursor keys     scroll large images
+, -            zoom in/out
ESQ, Q          quit
PgUp            previous image
PgDn, Space     next image
Return          next image, write the filename of the current
                image to stdout.
P               pause the slideshow (if started with -t, toggle)
<number>g       jump to image #<number>
.fi
.P
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.
.SH EDIT IMAGE
fbi also provides some very basic image editing facilities.  You have
to start fbi with the -e switch to use them.
.P
.nf
Shift+D         delete image
R               rotate 90