#!/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}"

}