catimg plugin

allow to print an image to the stdout using convert

plugins/catimg/catimg.plugin.zsh

+################################################################################
+# catimg script by Eduardo San Martin Morote aka Posva                         #
+# http://posva.net                                                             #
+#                                                                              #
+# Ouput the content of an image to the stdout using the 256 colors of the      #
+# terminal.                                                                    #
+# Github: https://github.com/posva/catimg                                      #
+################################################################################
+
+if [[ -x  `which convert` ]]; then
+  function catimg() {
+    source $(dirname $0)/catimg.sh $@
+  }
+else
+  echo "catimg need convert (ImageMagick) to work)"
+fi

plugins/catimg/catimg.sh

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