watermark a bunch of image files in a dir

watermark.sh

#!/bin/bash

if [ "$#" -lt 2 ]; then
	echo "Usage: $0 dir text" >&2
	exit 1
fi

# 1275x1650 - the size of the A4 images
dir=$1
text=$2

#create the directory for the watermarked images
if [ -d "$text/$dir" ]; then
	echo "directory $text/$dir already exists"
	exit
fi
mkdir -p "$text/$dir"

#create the watermak image
convert -rotate 75 -background "none" -pointsize "180" -stroke "#00000099" -strokewidth "1" -fill "#FFFFFF09" -font 'arialbd.ttf' "label:$text" "$text/watermark.png"

for page in $dir/page-*.jpg; do
	b="$(basename $page)"
	echo $b
	composite -geometry "+0-10" -gravity "center" "$text/watermark.png" "$page" "$text/$dir/$b"
	echo $page
done
echo "done"