Blame Scripts/Functions/Render/render_convertGplToHex.sh

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#!/bin/bash
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#
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# render_convertGplToHex.sh -- This function takes one palette
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# produced by Gimp (e.g., syslinux.gpl) as input and outputs the list
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# of hexadecimal colors and their respective index position the
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# `pnmtolss16' program needs (e.g., #RRGGBB=0 #RRGGBB=1 ... [all
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# values in the same line]).
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#
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# Copyright (C) 2009-2011 Alain Reguera Delgado
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at
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# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function render_convertGplToHex {
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    local COLOR=''
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    local COUNT=0
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    local -a FILES
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    # Define path to GPL palette. This is the .gpl file we use to
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    # retrive color information from.
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    local PALETTE_GPL="$1"
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    # Define path to HEX palette. This is the palette used to stored
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    # the color information the `ppmtolss16' program needs.
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    local PALETTE_HEX="$2"
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    # Define the number of colors this function should return.
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    local COLOR_NUMBER="$3"
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    # Verify the number of colors this function should return. As
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    # convenction, we are producing images in 14 and 16 colors only to
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    # cover Grub and Syslinux images need respectively.
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    if [[ ! $COLOR_NUMBER =~ '^(14|16)$' ]];then
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        cli_printMessage "`eval_gettext "Reducing image to \\\`\\\$COLOR_NUMBER' colors is not supported."`" 'AsErrorLine'
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        cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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    fi
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    # Define list of colors from GPL palette.
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    local COLORS=$(render_getColors "$PALETTE_GPL")
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    # Verify number of colors returned in the list.
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    if [[ ! $(echo "$COLORS" |  wc -l) =~ $COLOR_NUMBER ]];then
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        cli_printMessage "`gettext "The palette doesn't have the correct number of colors."`" 'AsErrorLine'
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        cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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    fi
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    # Verify format of colors inside the list.
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    for COLOR in $COLORS;do
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        if [[ ! $COLOR =~ '^[0-9a-f]{6}$' ]];then
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            cli_printMessage "`eval_gettext "The \\\`\\\$COLOR' string isn't a valid color code."`" 'AsErrorLine'
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            cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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        fi
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    done
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    # Create list of colors to be process by pnmtolss16 
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    echo "$COLORS" | nl | awk '{ printf "#%s=%d ", $2, $1 - 1 }' \
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        > $PALETTE_HEX
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    # Verify HEX palette existence.
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    cli_checkFiles "$PALETTE_PPM" 'f'
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}