Some scripts for Doom sprite manipulation. They may or may not work correctly, only tested with Cygwin+Imagemagick

rename_tiles.sh

# renames tiles given in dir $1 as frames given as list file $2
tilelist=$(ls $1)
framelist=$(cat $2)
tiles=($tilelist)
frames=($framelist)

count=${#frames[@]}
for i in `seq 1 $count`
do
	echo "copying $1/${tiles[$i-1]} ${frames[$i-1]}" 
    cp $1\/${tiles[$i-1]} ${frames[$i-1]}
done

sprite_offsets.h

#!/usr/bin/sh
# generates ZDoom TEXTURES file with the given offset and size
#
# USAGE:
# ./sprite_offsets.sh "128, 128" "64, 64" sprite_name_list.txt > TEXTURES.something

size=$1 # of form "x, y"
offset=$2 # of form "x, y"

while read sprite; do
base=`basename "$sprite" .png`
read -r -d '' def <<EOF

sprite $base, $size
{
        Offset $offset
        Patch $base, 0, 0
        {
        }
}
EOF
echo "$def"
done < $3

tile2sprite.sh

#
# Sprite Doom filenames should be in parameter 8, e.g. "spiderframes.txt"
# 
# Example:
# $ ./tile2sprite.sh spiderspace_noface.png 128 100 64 70 out babyspiderframes.txt ../TEXTURES.spiderframe
#
#
# filename width height ofs_x ofs_y tempspritedir tempfile TEXTURES-file
#echo $1 "$2"x"$3" "$4","$5" "$6"/sprite_%03d.png tempfile: $7 $8
tiles="$1"
width="$2"
height="$3"
ofs_x="$4"
ofs_y="$5"
spritedir="$6"
framenames="$7"
output="$8"

echo Splitting "$tiles" to separate frames
echo Size: "$width"x"$height"
echo Offset: "$ofs_x", "$ofs_y"
echo Temp sprite dir: "$spritedir"

echo Framenames: "$framenames"
echo Output: "$output"

basedir=$(pwd)
namedir="$spritedir"/named
tiledir="$spritedir"/tiles

mkdir "$spritedir"
mkdir "$namedir"
mkdir "$tiledir"

pushd "$spritedir"
rm *.png
rm *.txt
popd

convert $1 -crop "$width"x"$height" "$tiledir"/sprite_%03d.png
pushd "$namedir"
rm *.text 	
rm *.png # remove old images
echo Restoring frame names
"$basedir"/rename_tiles.sh "$basedir"/"$tiledir" "$basedir"/"$framenames" 
popd

echo Creating TEXTURES file to "$output"
ls -1 "$namedir" | grep .png > "$spritedir"/names.txt
./sprite_offsets.sh "$width, $height" "$ofs_x, $ofs_y" "$spritedir"/names.txt > "$output"
echo Sprites can be found at "$namedir"

tiletys.sh

# joins multiple sprites into a big tilesheet
# tiletys.sh spritedir size(e.g 100x100) outputfile
montage `ls $1 -1 | grep png | tr "\\n" " "` -tile 8x8 -geometry "$2"\>+0+0 -background none "$3"

# splitting back to tiles
# convert tileset.png -crop 66x66 out/sprite_%03d.png

# then rename the tiles back to zdoom matching names with rename_tiles.sh