Blame Scripts/Functions/Render/render_svg_convertGplToHex.sh

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#!/bin/bash
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#
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# render_svg_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, 2010, 2011 The CentOS Artwork SIG
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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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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function render_svg_convertGplToHex {
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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 NUMBER="$3"
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    # Define list of colors from GPL palette.
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    local COLORS=$(render_svg_getColors $PALETTE_GPL --head=$NUMBER --tail=$NUMBER)
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    # Verify number of colors returned in the list. They must match
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    # exactly the amount specified, no more no less. Sometimes, the
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    # list of colors may have less colors than it should have, so we
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    # need to prevent such palettes from being used.
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    render_svg_checkColorAmount "$COLORS" "$NUMBER"
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    # Verify format of colors.
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    render_svg_checkColorFormats "$COLORS" --format='rrggbb'
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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_HEX
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}