update packages

[CreaPhase.git] / octave_packages / m / plot / saveas.m

diff --git a/octave_packages/m/plot/saveas.m b/octave_packages/m/plot/saveas.m
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+## Copyright (C) 2010-2012 Kai Habel
+##
+## 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} {} saveas (@var{h}, @var{filename})
+## @deftypefnx {Function File} {} saveas (@var{h}, @var{filename}, @var{fmt})
+## Save graphic object @var{h} to the file @var{filename} in graphic
+## format @var{fmt}.
+##
+## @var{fmt} should be one of the following formats:
+##
+## @table @code
+##   @item ps
+##     Postscript
+##
+##   @item eps
+##     Encapsulated Postscript
+##
+##   @item jpg
+##     JPEG Image
+##
+##   @item png
+##     PNG Image
+##
+##   @item emf
+##     Enhanced Meta File
+##
+##   @item pdf
+##     Portable Document Format
+## @end table
+##
+## All device formats specified in @code{print} may also be used.  If
+## @var{fmt} is omitted it is extracted from the extension of @var{filename}.
+## The default format is @code{"pdf"}.
+##
+## @example
+## @group
+## clf ();
+## surf (peaks);
+## saveas (1, "figure1.png");
+## @end group
+## @end example
+##
+## @seealso{print}
+## @end deftypefn
+
+## Author: Kai Habel
+
+function  saveas (h, filename, fmt = "pdf")
+
+  if ((nargin != 2) && (nargin != 3))
+    print_usage ();
+  endif
+
+  if (ishandle (h))
+    if (isfigure (h))
+      fig = h;
+    else
+      fig = ancestor (h, "figure");
+    endif
+  else
+    error ("saveas: first argument H must be a graphics handle");
+  endif
+
+  if (!ischar (filename))
+    error ("saveas: FILENAME must be a string");
+  endif
+
+  if (nargin == 2)
+    [~, ~, ext] = fileparts (filename);
+    if (!isempty (ext))
+      fmt = ext(2:end);
+    endif
+  endif
+
+  if (nargin == 3)
+    if (!ischar (filename))
+      error ("saveas: EXT must be a string");
+    endif
+
+    [~, ~, ext] = fileparts (filename);
+
+    if (isempty (ext))
+      filename = strcat (filename, ".", fmt);
+    endif
+  endif
+
+  prt_opt = strcat ("-d", tolower (fmt));
+
+  print (filename, prt_opt);
+
+endfunction