#!/bin/bash

##########################################
# Image watermark application script 1.0 #
# by Fredrik Boström                     #
# fredrik@fredrikbostrom.net             #
##########################################
#             CONFIGURATION              #
##########################################
#                                        #
# Path to watermark image (should have   #
# transparent background)                #

WATERMARK="/home/fredde/Pictures/watermark_gallery.png"

#               END CONFIG               #
##########################################

usage()
cat <<EOF
Usage: `basename $0` INPUTDIR

Applies the watermark image to all images in the direcory. The watermark is applied to the bottom left corner of the image. For best result, the watermark should have a transparent background and semi-transparent text. 

INPUTDIR is the directory with images to watermark.

EOF

if [ $# -lt 1 ]; then
    usage
    exit 1
fi

if [ -d "$1" -a -r "$1" -a -w "$1" ]; then
    INDIR="$1"
    echo $INDIR
else
    echo $1 is not a readable and/or writeable directory
    exit 1
fi


echo "Using watermark: $WATERMARK"
echo ""
echo ""

IMGNO=1;
IMGTOT=`ls -l $INDIR|wc -l`
IMGTOT=`expr $IMGTOT - 1`

for img in `find "$INDIR" -iname \*.jpg`; do
    echo "IMG ${IMGNO}/${IMGTOT}: $img"
    if [ ! -z $WATERMARK ]; then
	echo "Watermarking"
#	echo "composite -gravity southeast $WATERMARK "$INDIR"/`basename $img` "$INDIR"/`basename $img`"
	composite -gravity southeast $WATERMARK "$INDIR"/`basename $img` "$INDIR"/`basename $img`
    fi
    IMGNO=`expr $IMGNO + 1`;
done

echo "Setting permissions to 644..."
chmod 644 $INDIR/*

echo "Done."