From bd5b8233bb669a3a88b59289221825f2d48f71be Mon Sep 17 00:00:00 2001
From: Alain Reguera Delgado <alain.reguera@gmail.com>
Date: Mar 21 2011 21:17:57 +0000
Subject: Add render_convertGplToHex.sh.


---

diff --git a/Scripts/Bash/Cli/Functions/Render/render_convertGplToHex.sh b/Scripts/Bash/Cli/Functions/Render/render_convertGplToHex.sh
new file mode 100755
index 0000000..6715ad0
--- /dev/null
+++ b/Scripts/Bash/Cli/Functions/Render/render_convertGplToHex.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+#
+# render_convertGplToHex.sh -- This function takes one palette
+# produced by Gimp (e.g., syslinux.gpl) as input and outputs the list
+# of hexadecimal colors and their respective index position the
+# `pnmtolss16' program needs (e.g., #RRGGBB=0 #RRGGBB=1 ... [all
+# values in the same line]).
+#
+# Copyright 2009-2011 Alain Reguera Delgado
+#
+# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+# USA.
+# 
+# ----------------------------------------------------------------------
+# $Id$
+# ----------------------------------------------------------------------
+
+function render_convertGplToHex {
+
+    local COLOR=''
+    local COUNT=0
+    local -a FILES
+
+    # Define path to GPL palette. This is the .gpl file we use to
+    # retrive color information from.
+    local PALETTE_GPL="$1"
+
+    # Define path to HEX palette. This is the palette used to stored
+    # the color information the `ppmtolss16' program needs.
+    local PALETTE_HEX="$2"
+
+    # Define the number of colors this function should return.
+    local COLOR_NUMBER="$3"
+
+    # Verify the number of colors this function should return. As
+    # convenction, we are producing images in 14 and 16 colors only to
+    # cover Grub and Syslinux images need respectively.
+    if [[ ! $COLOR_NUMBER =~ '^(14|16)$' ]];then
+        cli_printMessage "`eval_gettext "Reducing image to \\\`\\\$COLOR_NUMBER' colors is not supported."`" 'AsErrorLine'
+        cli_printMessage "$(caller)" 'AsToKnowMoreLine'
+    fi
+
+    # Define list of colors from GPL palette.
+    local COLORS=$(render_getColors "$PALETTE_GPL")
+
+    # Verify number of colors returned in the list.
+    if [[ ! $(echo "$COLORS" |  wc -l) =~ $COLOR_NUMBER ]];then
+        cli_printMessage "`gettext "The palette doesn't have the correct number of colors."`" 'AsErrorLine'
+        cli_printMessage "$(caller)" 'AsToKnowMoreLine'
+    fi
+
+    # Verify format of colors inside the list.
+    for COLOR in $COLORS;do
+        if [[ ! $COLOR =~ '^[0-9a-f]{6}$' ]];then
+            cli_printMessage "`eval_gettext "The \\\`\\\$COLOR' string isn't a valid color code."`" 'AsErrorLine'
+            cli_printMessage "$(caller)" 'AsToKnowMoreLine'
+        fi
+    done
+
+    # Create list of colors to be process by pnmtolss16 
+    echo "$COLORS" | nl | awk '{ printf "#%s=%d ", $2, $1 - 1 }' \
+        > $PALETTE_HEX
+
+    # Verify HEX palette existence.
+    cli_checkFiles "$PALETTE_PPM" 'f'
+
+}