#!/bin/sh

# Convert a set of image files to new file format
#
# usage:
#
#       example% batch_image_convert <new image type> image1 image2 etc
#
# writes output images image1.* and image2.* where * is the new file type.

# default prefix
VIPSHOME=${VIPSHOME-/usr/local}

name=`basename $0`

# check args
if [ $# -lt 2 ]; then
	echo "usage: $name <new image type> image1 image2 ..."
	echo 
	echo "$name uses VIPS to convert a group of image files of"
	echo "any image format into a new group of images all of the same"
	echo "image format. VIPS can read almost any standard image format"
	echo "but it can only write VIPS, JPEG, TIFF, PPM/PBM/PGM or PNG."

	exit 1
fi

type=$1
shift

# convert each argument
for i in $*; do
	# drop the suffix on the filename
	base=${i%*.*}
	echo "Converting $i to $base.$type ..." 

        if [ -f $base.$type ]; then
                echo "$base.$type already exists skiping $i"
        else
                $VIPSHOME/bin/vips im_copy $i $base.$type
        fi
done


