#!/bin/sh
#******************************************************************************
#FILE:				pic-merge-diff3
#LANGUAGE:			sh
#SYSTEM:			UNIX
#USER-INTERFACE:	None
#DESCRIPTION
#	This script is a driver for the GIMP scheme script pic-mere-diff3.scm.
#USAGE
#	pic-merge-diff3 [-h|--help] [-] original edit1 edit2 merge
#
#AUTHORS
#	<PJB> Pascal J. Bourguignon
#MODIFICATIONS
#	2001-07-13 <PJB> Creation.
#BUGS
#LEGAL
#    LGPL
#    Copyright Pascal J. Bourguignon 2001 - 2001
#
#    This  library is  free software;  you can  redistribute  it and/or
#    modify  it under  the  terms  of the  GNU  Library General  Public
#    License  as  published by  the  Free  Software Foundation;  either
#    version 2 of the License, or (at your option) any later version.
#
#    This library  is distributed in the  hope that it  will be useful,
#    but  WITHOUT ANY WARRANTY;  without even  the implied  warranty of
#    MERCHANTABILITY or FITNESS FOR  A PARTICULAR PURPOSE.  See the GNU
#    Library General Public License for more details.
#
#    You should have received a  copy of the GNU Library General Public
#    License  along with this  library; see  the file  COPYING.LIB.  If
#    not,  write to  the Free  Software Foundation,  59 Temple  Place -
#    Suite 330, Boston, MA 02111-1307, USA.
#******************************************************************************
pname=`basename $0`

files=0
pic1=
pic2=
pic3=
merge=

function usage () {
    echo "${pname} usage:"
    echo "     ${pname} [-h|--help] [-] picture1 picture2 picture3 merge"
}


function addfile () {
    if [ "$pic1" = "" ] ; then
        pic1="$1"
    elif [ "$pic2" = "" ] ; then
        pic2="$1"
    elif [ "$pic3" = "" ] ; then
        pic3="$1"
    elif [ "$merge" = "" ] ; then
        merge="$1"
    else
        echo "${pname}: Too many parameter '${arg}'."
        usage
        exit 2
    fi
}


for arg ; do

    case "$arg" in
    -h|--help)
        usage
        exit 0
        ;;
    -)
        files=1
        ;;
    -*)
        if [ $files -eq 0 ] ; then
           echo "${pname}: Invalid option '${arg}'."
           usage
           exit 1
        fi
        addfile "${arg}"
        ;;
    *)
        addfile "${arg}"
        ;;
    esac

done


if [ "$merge" = "" ] ; then
    echo "${pname}: Missing parameter."
    usage
    exit 3
fi



# (gimp-message-set-handler [012]) does not seem effective.

gimp  --no-data  --console-messages  --no-interface  --batch \
    "(gimp-message-set-handler 1)" \
    "(pic-merge-diff3-internal RUN-NONINTERACTIVE \"$pic1\" \"$pic2\" \"$pic3\" \"$merge\")" \
    "(gimp-quit 0)"

#
#END#