--- /dev/null
+## Copyright (C) 2010-2012 David Bateman
+##
+## This file is part of Octave.
+##
+## Octave 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 3 of the License, or (at
+## your option) any later version.
+##
+## Octave 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 Octave; see the file COPYING. If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {@var{rgb} =} __color_str_rgb__ (@var{str})
+## Undocumented internal function.
+## @end deftypefn
+
+function rgb = __color_str_rgb__ (str)
+
+ if (ischar (str))
+ if (strncmpi (str, "black", 5))
+ rgb = [0, 0, 0];
+ elseif (strncmpi (str, "red", 3))
+ rgb = [1, 0, 0];
+ elseif (strncmpi (str, "green", 5))
+ rgb = [0, 1, 0];
+ elseif (strncmpi (str, "blue", 4))
+ rgb = [0, 0, 1];
+
+ elseif (strncmpi (str, "yellow", 6))
+ rgb = [1, 1, 0];
+ elseif (strncmpi (str, "magenta", 7))
+ rgb = [1, 0, 1];
+ elseif (strncmpi (str, "cyan", 4))
+ rgb = [0, 1, 1];
+ elseif (strncmpi (str, "white", 5))
+ rgb = [1, 1, 1];
+ else
+ rgb = [0, 0, 0];
+ endif
+ else
+ error ("__color_str_rgb__: expecting a string argument");
+ endif
+endfunction