#!/bin/bash
# Write a exif-comment to all JPEG-Files from this directory and all subdirectorys
#
# (c) LUG-VS (GPL)
VERSION="write-exif-comment.sh Version 0.0.1 from 16.06.2019"
#
# Input:	InImage [OutImage]
# Output:	changed files
#
# Changes:
#	0.0.1:		generation
#
test -e $1 || exit -1
FilenameFull="$1"
if [ $# -gt 1 ] ; then
    FilenameSik="$2"
else
    Extension="${FilenameFull##*.}"
    FilenameBase="${FilenameFull%.*}"
    FilenameSik="${FilenameBase}New.${Extension}"
fi
CommentsText="$(convert ${FilenameFull} -format "%c\n" info:)"
Width=$(identify -format %w ${FilenameFull})
High=$(( $(identify -format %h ${FilenameFull}) / 10))
echo "EXIF-Kommentar= <${CommentsText}> of <${FilenameFull}> (${Width}x${High} ${FilenameSik})"
convert -background '#0008' -fill white -gravity center -size ${Width}x${High} caption:"${CommentsText}" \
          ${FilenameFull} +swap -gravity south -composite  ${FilenameSik}