Blame Scripts/Bash/Functions/Render/render_doIdentityImageGrub.sh

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#!/bin/bash
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#
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# render_doIdentityImageGrub.sh -- This function provides
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# post-rendering action used to produce GRUB images.
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#
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# Copyright (C) 2009, 2010 Alain Reguera Delgado
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# 
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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# 
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA.
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# 
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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function render_doIdentityImageGrub {
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    local FILE=$1
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    local ACTION="$2"
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    local OPTIONS=''
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    # Define 16 colors images default file name prefix.
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    local PREFIX='-14c'
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    # Define options using those passed to actions from pre-rendering
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    # configuration script. These options are applied to pnmremap when
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    # doing color reduction, so any option available for pnmremap
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    # command can be passed to renderSyslinux functionality.
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    OPTIONS=$(render_getConfOption "$ACTION" '2-')
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    # Re-define 16 colors images default file name prefix using
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    # options as reference. This is useful to differenciate final
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    # files produced using Floyd-Steinberg dithering and files which
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    # do not.
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    if [[ "$OPTIONS" =~ '-floyd' ]];then
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        PREFIX="${PREFIX}-floyd"
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    fi
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    # Check options passed to action. This is required in order to
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    # aviod using options used already in this script. For example
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    # -verbose and -mapfile options.
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    for OPTION in $OPTIONS;do
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        # Remove anything after equal sign inside option.
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        OPTION=$(echo -n $OPTION | cut -d'=' -f1)
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        if [[ "$OPTION" =~ "-(mapfile|verbose)" ]];then
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            cli_printMessage "`eval_gettext "The \\\$OPTION option is already used."`"
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            cli_printMessage "$(caller)" "AsToKnowMoreLine"
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        fi
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    done
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    # Define motif's palette location.
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    local PALETTES=$(cli_getRepoTopLevelPath)/Identity/Themes/Motifs/$(cli_getThemeName)/Colors
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    # Define the Netpbm color palettes used when reducing colors.
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    # These palettes should be 14 colors based. For more information
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    # on this see the GRUB's documentation.
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    local PALETTE_PPM=$PALETTES/grub.ppm
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    # Print which palette of colors centos-art.sh script is using to
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    # produce grub content. This is relevant in order to know if we
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    # are using wether trunk or branches palette of colors.
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    cli_printMessage "$PALETTE_PPM" 'AsPaletteLine'
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    # Check GRUB's palettes existence:  If there is no palette assume
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    # that this is the first time you are rendering GRUB images. If
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    # that is the case the script will provide you with the PNG format
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    # which should be used as base to produce (using GIMP) the .gpl
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    # palette.  The .gpl palette information is used to produced
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    # (using GIMP) the colormap (.ppm) which is used to automate the
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    # GRUB's 14 colors image (splash.png) rendering.  If there is no
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    # palette available, do not apply color reduction, show a message,
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    # and continue.
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    cli_checkFiles $PALETTE_PPM
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    # Create Netpbm superformat (PNM). PNM file is created from the
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    # PNG image rendered previously. PNM is a common point for image
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    # manipulation using Netpbm tools.
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    cli_printMessage "$FILE.pnm" "AsSavedAsLine"
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    pngtopnm -verbose \
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        < $FILE.png \
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        2>$FILE.log \
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        > $FILE.pnm
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    # Reduce colors as specified in ppm palette of colors.
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    cli_printMessage "${FILE}${PREFIX}.ppm" "AsSavedAsLine"
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    pnmremap -verbose -mapfile=$PALETTE_PPM $OPTIONS \
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        < $FILE.pnm \
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        2>>$FILE.log \
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        > ${FILE}${PREFIX}.ppm
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    # Create the 14 colors xpm.gz file.
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    cli_printMessage "${FILE}${PREFIX}.xpm.gz" "AsSavedAsLine"
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    ppmtoxpm \
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        < ${FILE}${PREFIX}.ppm \
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        2>>$FILE.log \
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        > $FILE.xpm \
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        && gzip --force $FILE.xpm \
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        && mv $FILE.xpm.gz ${FILE}${PREFIX}.xpm.gz
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}