#!/bin/bash
# Add colorized mask
#set -x

DARKER ()
{
	CLR=`echo "$CLR * 0.${NUM}"|bc -l|awk -F. '{print $1}'`
}  
LIGHTER ()
{
        CLR=`echo "(((255-$CLR)*(0.${NUM}*2)+($CLR*2))/2)"|bc -l|awk -F. '{print $1}'`
} 

RANDOMIZE ()
{
	NUM=$RANDOM
	let "NUM %= 100"

	COIN=$RANDOM
	let "COIN %= 2"
	if [ "$COIN" = "1" ]
	then
		        SKIN=DARKER
#	else
#	        let "NUM = $NUM /2"
	fi

	CLR=$CLR1 ; $SKIN ; CLR1=$CLR
	CLR=$CLR2 ; $SKIN ; CLR2=$CLR
	CLR=$CLR3 ; $SKIN ; CLR3=$CLR
}



for FILE in *.jpg
do
REALNAME=`jhead $FILE|grep ^Comment|awk -F': ' '{print $NF}'`
SKIN=LIGHTER
COLOUR=`convert $FILE -filter Box -resize 1x1 -depth 8 txt:-| tail -n 1 | \
awk -F\) '{print $1}'|awk -F\( '{print $NF}'`

CLR1=`echo ${COLOUR}|awk -F, '{print $1}'| sed 's/ //g'`
CLR2=`echo ${COLOUR}|awk -F, '{print $2}'| sed 's/ //g'`
CLR3=`echo ${COLOUR}|awk -F, '{print $3}'| sed 's/ //g'`

RANDOMIZE #Remove if you so desire
COLOUR="rgb($CLR1,$CLR2,$CLR3)"

convert -size 1920x1200 xc:${COLOUR} overlay.jpg

NUM2=$RANDOM
let "NUM2 %= 10"
let "NUM2 = $NUM2 + 1 "
let "NUM2 = $NUM2 * 5 "
let "NUM2 = $NUM2 + 30 "

composite -blend ${NUM2}% $FILE overlay.jpg file2.jpg

mv file2.jpg $FILE
printf "$SKIN $NUM $NUM2 : " ; jhead -cl "$REALNAME" $FILE
rm overlay.jpg
sleep 2
done