#!/bin/sh
#
# anytopnm - attempt to convert an unknown type of image file to a P?M file.
#
# Copyright (C) 1991 by Jef Poskanzer.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
# that the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation. This software is provided "as is" without express or
# implied warranty.
putInputIntoTempfile() {
# $1 is the input file specification
# $2 is the temporary file name
rm -f "$2"
if [ "$1" = "-" ] ; then
cat > "$2"
else
# We'd like to do a -e here to test the existence of the filesystem
# object per se, and thus give a more specific error message. But
# some systems don't have -e.
if [ ! -f "$1" ] ; then
echo "$progname: '$1' does not exist or is not a file" 1>&2
exit 1
fi
if [ ! -r "$1" ] ; then
echo "$progname: '$1' is not readable" 1>&2
exit 1
fi
if [ -z "$1" ] ; then
echo "$progname: '$1' is empty" 1>&2
exit 1
fi
cat < "$1" > "$2"
fi
}
setMimeType() {
#------------------------------------------------------------------------------
# Set variable 'mimeType' to the mime type string (e.g. "application/binary")
#
# If we can't tell, set it to "unknown".
#------------------------------------------------------------------------------
# $1 is the file name
# Old versions of 'file' cannot tell us the mime type; they lack any option
# to do so.
#
# Newer ones have a --mime option for that.
#
# Still newer ones (ca 2008) have a --mime option, but it does something
# different - it prints the mime type plus the mime encoding. And they
# have --mime-type to print just the mime type.
file --mime-type /dev/null >/dev/null 2>/dev/null
if [ $? -eq 0 ]; then
# Now that we know the --mime-type option exists, use it.
mimeType=`file --mime-type "$1" | cut -d: -f2- | cut -c2-`
else
# file --mime-type failed; we don't know why, but we assume it's
# because it is an older 'file' program that doesn't have a --mime-type
# option.
file --mime /dev/null >/dev/null 2>/dev/null
if [ $? -eq 0 ]; then
# Now that we know the --mime option exists, use it.
mimeType=`file --mime "$1" | cut -d: -f2- | cut -c2-`
else
# file --mime failed; we don't know why, but we assume it's because
# it is an older 'file' program that doesn't have a --mime option.
mimeType="unknown"
fi
fi
}
computeTypeFromMimeType () {
# $1 is the mime type string
case "$1" in
image/jpeg )
filetype="jfif"
;;
image/gif )
filetype="gif"
;;
image/tiff )
filetype="tiff"
;;
image/bmp )
filetype="bmp"
;;
image/x-ms-bmp )
filetype="bmp"
;;
image/png )
filetype="png"
;;
image/x-portable-bitmap | image/x-portable-pixmap | \
image/x-portable-greymap)
filetype="pnm"
;;
image/x-xpm )
filetype="xpm"
;;
* )
filetype=unknown
;;
esac
}
computeTypeFromTypeDescription () {
# $1 is the full description from 'file' of the file type
case "$1" in
*PBM* | *PGM* | *PPM* | *Netpbm*PAM*)
filetype=pnm
;;
*JPEG* | *JFIF* )
filetype=jfif
;;
*PNG* )
filetype=png
;;
*GIF* )
filetype=gif
;;
*TIFF* )
filetype=tiff
;;
# We have seen "PC bitmap" and "PC bitmap data"
*PC*bitmap* )
filetype=bmp
;;
*uuencoded* )
filetype=uuencoded
;;
*bzip2*compressed*data* )
filetype=bzip2
;;
*bzip*compressed*data* )
filetype=bzip
;;
*gzip*compressed*data* )
filetype=gzip
;;
*XWD*X*Window*Dump* )
filetype=xwd
;;
*compress* )
filetype=compress
;;
*btoa* )
filetype=btoa
;;
*Sun* | *rasterfile* )
filetype=rast
;;
*IFF*ILBM* )
filetype=ilbm
;;
*Lisp* )
filetype=lispm
;;
*PC*Paintbrush* )
filetype=pcx
;;
*Bennet* )
filetype=ybm
;;
*pixmap*image*text* )
filetype=xpm
;;
# This has to come after all other 'text' files, or you may be
# disappointed.
*text* )
filetype=text
;;
*MicroDesign* )
filetype=mda
;;
* )
filetype=unknown
;;
esac
}
computeTypeFromFilenameExtension () {
# $1 is the filename extension (".gif", etc.)
case "$1" in
*.pbm | *.pbm.* | *.pgm | *.pgm.* | *.ppm | *.ppm.* )
filetype=pnm
;;
*.JPEG | *.jpeg | *.jpg | *.JPG )
filetype=jfif
;;
*.gif | *.gif.* )
filetype=gif
;;
*.png | *.PNG )
filetype=png
;;
*.tif | *.tif.* | *.tiff | *.tiff.* )
filetype=tiff
;;
*.bmp )
filetype=bmp
;;
*.x | *.x.* | *.xbm | *.xbm.* | *.x10bm | *.x10bm.* | \
*.x11bm | *.x11bm.* | *.bitmap | *.bitmap.* )
filetype=xbm
;;
*.r | *.r.* | *.rast | *.rast.* )
filetype=rast
;;
*.mac | *.mac.* | *.macp | *.macp.* )
filetype=macp
;;
*.g3 | *.g3.* | *.fax | *.fax.* )
filetype=g3
;;
*.xwd | *.xwd.* | *.x10wd | *.x10wd.* \
| *.x11wd | *.x11wd.* )
filetype=xwd
;;
*.brush | *.brush.* )
filetype=brush
;;
*.img | *.img.* )
filetype=gem
;;
*.pcx | *.pcx.* )
filetype=pcx
;;
*.pic | *.pic.* | *.pict | *.pict.* | *.pict2 | *.pict2.* )
filetype=pict
;;
*.fs | *.fs.* | *.face | *.face.* )
filetype=fs
;;
*.hips | *.hips.* )
filetype=hips
;;
*.fits | *.fits.* )
filetype=fits
;;
*.iff | *.iff.* | *.ilbm | *.ilbm.* )
filetype=ilbm
;;
*.lispm | *.lispm.* )
filetype=lispm
;;
*.mtv | *.mtv.* )
filetype=mtv
;;
*.qrt | *.qrt.* )
filetype=qrt
;;
*.tga | *.tga.* | *.targa | *.targa.* )
filetype=tga
;;
*.xim | *.xim.* )
filetype=xim
;;
*.xpm | *.xpm.* | *.xpm2 | *.xpm2.* )
filetype=xpm
;;
*.pi1 | *.pi1.* )
filetype=pi1
;;
*.pi3 | *.pi3.* )
filetype=pi3
;;
*.spu | *.spu.* )
filetype=spu
;;
*.spc | *.spc.* )
filetype=spc
;;
*.ybm | *.ybm.* | *.face | *.face.* )
filetype=ybm
;;
*.mda | *.mdp )
filetype=mda
;;
* )
filetype=unknown
;;
esac
}
determineType () {
# $1 is the name of the file that contains the subject file's contents
# $2 is the mime type or "unknown"
# $3 is the type description from 'file'
if [ "$2" = "unknown" ]; then
filetype="unknown"
else
computeTypeFromMimeType "$2"
fi
if [ "$filetype" = "unknown" ]; then
computeTypeFromTypeDescription "$3"
fi
if [ "$filetype" = "unknown" ]; then
computeTypeFromFilenameExtension "$4"
fi
}
convertIt () {
# Based on the file type computed, do the conversion
# $1 is the input file name
# $2 is our file type code
case "$2" in
pnm )
cat "$file"
;;
uuencoded )
newfile="$tempdir/atn.decode.$$"
rm -f "$newfile"
(echo begin 600 $newfile; sed 1d < "$file") | uudecode
anytopnm "$newfile"
;;
bzip2 )
bzip2 -dk < "$file" | anytopnm -
;;
bzip )
bzip -dk < "$file" | anytopnm -
;;
gzip )
gzip --decompress --to-stdout < "$file" | anytopnm -
;;
compress )
uncompress -c < "$file" | anytopnm -
;;
btoa )
atob < "$file" | anytopnm -
;;
rast )
rasttopnm "$file"
;;
gif )
giftopnm -image=all "$file"
;;
tiff )
tifftopnm "$file"
;;
ilbm )
ilbmtoppm "$file"
;;
lispm )
lispmtopgm "$file"
;;
pcx )
pcxtoppm "$file"
;;
ybm )
ybmtopbm "$file"
;;
xpm )
xpmtoppm < "$file"
;;
# This has to come after all other 'text' files, or you may be
# disappointed.
text )
pbmtext -builtin fixed < "$file"
;;
jfif )
jpegtopnm "$file"
;;
png )
pngtopam "$file"
;;
mda )
mdatopbm -d -- "$file"
;;
bmp )
bmptoppm "$file"
;;
xbm )
xbmtopbm "$file"
;;
macp )
macptopbm "$file"
;;
g3 )
g3topbm "$file"
;;
xwd )
xwdtopnm "$file"
;;
brush )
brushtopbm "$file"
;;
img )
gemtopbm "$file"
;;
pcx )
pcxtoppm "$file"
;;
pict )
picttoppm "$file"
;;
fs )
fstopgm "$file"
;;
hips )
hipstopgm "$file"
;;
fits )
fitstopnm "$file"
;;
mtv )
mtvtoppm "$file"
;;
qrt )
qrttoppm "$file"
;;
tga )
tgatoppm "$file"
;;
xim )
ximtoppm "$file"
;;
pi1 )
pi1toppm "$file"
;;
pi3 )
pi3topbm "$file"
;;
spu )
sputoppm "$file"
;;
spc )
spctoppm "$file"
;;
* )
echo "$progname: INTERNAL ERROR. Illegal value of filetype variable"
exit 1
;;
esac
}
###############################################################################
# MAINLINE
###############################################################################
progname=$0
if [ $# -gt 1 ] ; then
echo "Too many arguments: $#. The only valid argument is the" \
"input file name." 1>&2
exit 1
elif [ $# -eq 1 ] ; then
if [ $1 = "--version" -o $1 = "-version" ] ; then
pamtopnm --version ; exit $?
else
inputFile="$1"
fi
else
inputFile="-"
fi
tempdir=$(mktemp -d -t anytopnm.XXXXXXXX) ||
( echo "Could not create temporary file. Exiting." 1>&2; exit 1; )
# Take out all spaces
# Find the filename extension for last-ditch efforts later
# We used to do this, but it doesn't work with all Awks. The sed below
# is universal. 2005.11.02.
#fileExtension=`echo "$inputFile" | \
# $AWK '{gsub(" ","");gsub(".*\\\\.",".");print}'`
fileExtension=`echo "$inputFile" | sed 's/ //;s/.*\././g'`
file="$tempdir/atn.stdin.$$"
putInputIntoTempfile "$inputFile" "$file"
setMimeType "$file"
typeDescription=`file "$file" | cut -d: -f2- | cut -c2-`
determineType "$file" "$mimeType" "$typeDescription" "$fileExtension"
if [ "$filetype" = "unknown" ]; then
echo "$progname: unknown file type. " \
"'file' says mime type is '$mimeType', " 1>&2
echo "type description is '$typeDescription'" 1>&2
if [ -d "$tempdir" ] ; then
rm -rf "$tempdir"
fi
exit 1
fi
convertIt $file $filetype
if [ -d "$tempdir" ] ; then
rm -rf "$tempdir"
fi
exit 0