#!/bin/bash
######################################################################
#
#   palette_convertGplToPpm.sh -- This function takes one palette
#   produced by Gimp (e.g., syslinux.gpl) as input and outputs one PPM
#   file based on it (e.g., syslinux.ppm).
#
#   Written by:
#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013
#
# Copyright (C) 2009-2013 The CentOS Artwork SIG
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
######################################################################

function palette_convertGplToPpm {

    local -a FILES
    local COUNT=0

    # Create temporal images (of 1x1 pixel each) to store each color
    # retrieved from Gimp's palette.
    for COLOR in ${PALETTE_GPL_COLORS};do
        FILES[${COUNT}]=$(tcar_getTemporalFile ${COUNT}.ppm)
        ppmmake ${COLOR} 1 1 > ${FILES[${COUNT}]}
        COUNT=$((${COUNT} + 1))
    done

    # Concatenate each temporal image from left to right to create the
    # PPM file.
    pnmcat -lr ${FILES[*]} > ${PALETTE_PPM}

    # Remove temporal images used to build the PPM palette file.
    rm ${FILES[*]}

    # Verify PPM palette existence.
    tcar_checkFiles -ef "${PALETTE_PPM}"

}