Meme Generator using ImageMagick

meme.sh

#!/bin/bash

# meme.sh
# https://gist.github.com/joshuaflanagan/77f31411d137aec9b9c1b79b42d339f8

# Meme generator with ImageMagick
# https://www.it-cooking.com/technology/digital-image/image-processing/meme-generator-imagemagick/

usage() {
  echo "Usage: $0 [ -t TOP_MSG ] [ -b BOTTOM_MSG ] [ -s FONTSIZE=80] [ -a TOP_FONTSIZE=80 ] [ -z BOTTOM_FONTSIZE=80 ] SRC DST"
}
failure() {
  usage
  exit 1
}

bottom_msg=""
top_msg=""
tmsg_size=80
bmsg_size=80

while getopts "hb:t:s:a:z:" opt; do
  case ${opt} in
    b )
      bottom_msg=$OPTARG
      ;;
    t )
      top_msg=$OPTARG
      ;;
    s )
      tmsg_size=$OPTARG
      bmsg_size=$OPTARG
      ;;
    a )
      tmsg_size=$OPTARG
      ;;
    z )
      bmsg_size=$OPTARG
      ;;
    h )
      usage
      exit 0
      ;;
    : )
      exit_abnormal
      ;;
    * )
      exit_abnormal
      ;;
  esac
done
shift $((OPTIND -1))

SIZE=$(identify -format "%[fx:w]x%[fx:h]" $1)
convert $1  \
   -gravity North \
   \( -size $SIZE xc:none -font Impact -pointsize ${tmsg_size} -stroke black -strokewidth 7 -annotate 0 "${top_msg}" -blur 0x1 \) -composite \
   -size $SIZE -font Impact -fill white -pointsize ${tmsg_size} -stroke none -annotate 0 "${top_msg}" \
   -gravity South \
   \( -size $SIZE xc:none -font Impact -pointsize ${bmsg_size} -stroke black -strokewidth 7 -annotate 0 "${bottom_msg}" -blur 0x1 \)\
   -size $SIZE -font Impact -fill white -pointsize ${bmsg_size} -stroke none -annotate 0 "${bottom_msg}" -composite\
   $2