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#!/bin/sh -e
# Display images directly in terminal.
# Tested with xterm v361. Depends on imagemagick convert(1).
[ "$LC_TERMINAL" = iTerm2 ] && [ -x "$HOME/.iterm2/imgcat" ] && exec "$HOME/.iterm2/imgcat" "$@"
# maxsize prints the geomtry size of terminal window, with
# a maximum value of 1000 pixels for width and height, or
# 640x480 if terminal size can not be probed.
maxsize() {
[ "$WINDOWID" ] || { echo "640x480>"; return; }
xwininfo -id "$WINDOWID" | {
w=1000 h=1000
while read -r a b; do
case $a in
(Width:) [ $((b < w)) = 1 ] && w=$b ;;
(Height:) [ $((b < h)) = 1 ] && h=$b ;;
esac
done
echo "${w}x$h"
}
}
clearline() { printf "\r \r"; }
ms=$(maxsize)
# Use convert(1) from imagemagick to output sixel format.
# -flatten uses the terminal background color as transparent layer
# -resize use the terminal size as bounding box, with a limit of 1000 pixels
# image is not resized if smaller than limit
#exec convert -resize "$(maxsize)>" -transparent-color white -flatten -- ${1:--} sixel:-
# color #rrrrggggbbbb
#exec convert -resize "$(maxsize)>" -- ${1:--} sixel:${2:--}
put=:
while getopts :cpv opt; do
case $opt in
(c) clear=1 ;;
(p) pause=1 put=printf ;;
(v) put=printf ;;
(*) echo "Usage: icat [-cpv] [image_file ...]"; exit 1 ;;
esac
done
shift $((OPTIND - 1))
[ "$#" = 0 -o "$#" = 1 -a "$1" = - ] && {
convert -resize "$ms>" - sixel:-
exit
}
for f; do
$put "Next: %s" "$f"
[ "$pause" ] && {
read -sr
[ "$REPLY" = s ] && clearline && continue
}
[ "$clear" ] && clear
clearline
$put "%s\n" "$f"
convert -resize "$ms>" -- "$f" sixel:-
done
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