#!/bin/bash

#

# svg_convertPngToBranded.sh -- This function standardizes image

# branding. Once the base PNG image is rendered and the

# `--with-brands' option is provided, this function composites a new

# branded image using the preferences set in the related

# `branding.conf' file.  The `branding.conf' file must be stored

# inside the related design model component used as reference to

# produce the base PNG image.

#

# Copyright (C) 2009, 2010, 2011 The CentOS Project

#

# 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.

#

# ----------------------------------------------------------------------

# $Id$

# ----------------------------------------------------------------------

function svg_convertPngToBranded {

    # Verify whether the option `--with-brands' was provided or not to

    # `centos-art.sh' script command-line.

    if [[ $FLAG_WITH_BRANDS == 'false' ]];then

        return

    fi

    local BRANDING_CONF_FILE=''

    local BRANDING_CONF_SECTION=''

    local BRANDING_CONF_VALUES=''

    local BRANDING_CONF_VALUE=''

    local BRANDFILE=''

    local POSITION=''

    local POSITIONS=''

    # Define absolute path to branding configuration file.

    BRANDING_CONF_FILE="$(dirname ${TEMPLATE})/branding.conf"

    # Verify absolute path to branding configuration file. This is

    # required in order to avoid trying to rendered branded content

    # which doesn't have an associated `branding.conf' file.

    cli_checkFiles "$BRANDING_CONF_FILE"

    # Define regular expression matching the variable name (i.e., the

    # left column), inside the configuration line, you want to match

    # on.

    BRANDING_CONF_VARNAME=$(basename ${TEMPLATE})

    # Define list of configuration lines related to current design

    # model. This are the lines that tell us how and where to apply

    # branding information on base PNG image. Be sure that only

    # configuration lines from supported section names (e.g.,

    # `symbol', `type', `logo') be read, no need to waste resources

    # with others.

    BRANDING_CONF_VALUES=$(\

        for BRANDING_CONF_SECTION in $(echo "types symbols logos");do

            cli_getConfigValue "${BRANDING_CONF_FILE}" "${BRANDING_CONF_SECTION}" "${BRANDING_CONF_VARNAME}"

        done)

    for BRANDING_CONF_VALUE in $BRANDING_CONF_VALUES;do

        # Define absolute path to image file used as brand. This is

        # the image put over the PNG image produced as result of

        # design models base rendition.

        BRANDFILE=$(cli_getRepoTLDir)/Identity/Images/Brands/$(echo $BRANDING_CONF_VALUE \

            | gawk 'BEGIN{ FS=":" } { print $1 }' \

            | sed -r "s/=BRAND=/${BRAND}/g")

        # Verify absolute path to image file used as brand. Assuming

        # no brand image file is found, continue with the next

        # configuration line.

        if [[ ! -f $BRANDFILE ]];then

            continue

        fi

        # Define list of positions using the format of ImageMagick

        # `-geometry' option argument. 

        POSITIONS=$(echo "$BRANDING_CONF_VALUE" | cut -d: -f2- | tr ':' ' ')

        # Loop through list of brand image positions and use the

        # composite command from ImageMagick, to overlap the unbranded

        # image just rendered with the branded version of itself.

        for POSITION in $POSITIONS;do

            composite -geometry ${POSITION} ${BRANDFILE} ${FILE}.png ${FILE}.png

        done

    done

}