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92 lines
2.4 KiB
Bash
92 lines
2.4 KiB
Bash
################################################################################
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# catimg script by Eduardo San Martin Morote aka Posva #
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# https://posva.net #
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# #
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# Output the content of an image to the stdout using the 256 colors of the #
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# terminal. #
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# GitHub: https://github.com/posva/catimg #
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################################################################################
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# this should come from outside, either `magick` or `convert`
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# from imagemagick v7 and ahead `convert` is deprecated
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: ${CONVERT_CMD:=convert}
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function help() {
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echo "Usage catimg [-h] [-w width] [-c char] img"
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echo "By default char is \" \" and w is the terminal width"
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}
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# VARIABLES
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COLOR_FILE=$(dirname $0)/colors.png
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CHAR=" "
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WIDTH=""
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IMG=""
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while getopts qw:c:h opt; do
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case "$opt" in
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w) WIDTH="$OPTARG" ;;
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c) CHAR="$OPTARG" ;;
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h) help; exit ;;
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*) help ; exit 1;;
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esac
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done
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while [ "$1" ]; do
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IMG="$1"
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shift
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done
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if [ "$IMG" = "" -o ! -f "$IMG" ]; then
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help
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exit 1
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fi
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if [ ! "$WIDTH" ]; then
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COLS=$(expr $(tput cols) "/" $(echo -n "$CHAR" | wc -c))
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else
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COLS=$(expr $WIDTH "/" $(echo -n "$CHAR" | wc -c))
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fi
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WIDTH=$($CONVERT_CMD "$IMG" -print "%w\n" /dev/null)
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if [ "$WIDTH" -gt "$COLS" ]; then
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WIDTH=$COLS
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fi
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REMAP=""
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if $CONVERT_CMD "$IMG" -resize $COLS\> +dither -remap $COLOR_FILE /dev/null ; then
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REMAP="-remap $COLOR_FILE"
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else
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echo "The version of convert is too old, don't expect good results :(" >&2
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# $CONVERT_CMD "$IMG" -colors 256 PNG8:tmp.png
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# IMG="tmp.png"
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fi
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# Display the image
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I=0
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$CONVERT_CMD "$IMG" -resize $COLS\> +dither `echo $REMAP` txt:- 2>/dev/null |
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sed -e 's/.*none.*/NO NO NO/g' -e '1d;s/^.*(\(.*\)[,)].*$/\1/g;y/,/ /' |
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while read R G B f; do
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if [ ! "$R" = "NO" ]; then
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if [ "$R" -eq "$G" -a "$G" -eq "$B" ]; then
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((
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I++,
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IDX = 232 + R * 23 / 255
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))
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else
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((
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I++,
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IDX = 16
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+ R * 5 / 255 * 36
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+ G * 5 / 255 * 6
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+ B * 5 / 255
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))
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fi
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#echo "$R,$G,$B: $IDX"
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echo -ne "\e[48;5;${IDX}m${CHAR}"
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else
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(( I++ ))
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echo -ne "\e[0m${CHAR}"
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fi
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# New lines
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(( $I % $WIDTH )) || echo -e "\e[0m"
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done
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