#!/bin/bash

######################################################################

#

#   tcar - The CentOS Artwork Repository automation tool.

#   Copyright © 2014 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.

#

#   Alain Reguera Delgado <al@centos.org.cu>

#   39 Street No. 4426 Cienfuegos, Cuba.

#

######################################################################

# Take one palette produced by Gimp (e.g., syslinux.gpl) as input and

# outputs one PPM file based on it (e.g., syslinux.ppm).

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}"

}