#!/bin/sh
# Author : Mathieu Vilaplana <mathieu@creationgif.com>
# Date : 09/03/2005
#depends: imagemagick, zenity
# thanks to coffe
#version 0.4
#	- check mime type
#since v 0.4, solve bug with filename spaces
#version 0.6
#	- correct bug in filename with spaces
#     - create a subdirectory to create images

#test if a file has been selected
if [ $# -eq 0 ]; then
	zenity --error --title="error" --text="You must select at least 1 file to process"
	exit 1
fi

#=========================
#       SELECT SIZE DIALOG
title="Choose which sizes to scale to"
imgsize=`zenity --title "$title"  --list --separator=" " --column="size" "160x120" "320x240" "640x480" "800x600" "800x600" "1024x768" `

#if $? != 0, user click on cancel button, so exit
if [ "$?" != 0 ] ; then
	exit
fi

#user must select a target size
imgsize=`echo $imgsize | sed 's/ max//g'`
if [ ! "$imgsize" ]; then
	zenity --error --title="error" --text="select a target size"
	exit
fi

#transform 640x480 en 640x640 for convert to respect proportions
himgsize=$imgsize
val1=`echo "$imgsize" | awk -F'x' '{ print $1  }'`
imgsize="${val1}x${val1}"

#       END SELECT SIZE DIALOG
#=========================


#Select only images
nb_images=0;
selection="";
while [ $# -gt 0 ]; do
	isimage=`file -bi "$1" | grep image | wc -l` 
	if [ $isimage -eq 1 ]; then
		selection[$nb_images]=$1
		let "nb_images++"
	fi
	shift
done

#create directory if not exist and at least one image to process
if [ ! -d $himgsize  ] && [ "$nb_images" -gt "0" ];then
		mkdir $himgsize
fi

n=$nb_images
let "n=n-1"
(for i in `seq 0 $n`;do
	picture=${selection[$i]}
	let "compteur += 1"
	echo "# Processing image $compteur / $nb_images $picture ..."
	convert -quality 80 -resize $imgsize "$picture" $himgsize/"$picture"
	let "progress = compteur*100/nb_images"
	echo $progress
done
) |
        zenity --progress --auto-close --title="Scaling images"  --text="Processing images ..."  --percentage=0