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########################################################################
##
## Copyright (C) 2010-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## 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
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {} saveas (@var{h}, @var{filename})
## @deftypefnx {} {} saveas (@var{h}, @var{filename}, @var{fmt})
## Save graphics object @var{h} to the file @var{filename} in graphics format
## @var{fmt}.
##
## If @var{h} is the handle to a figure object, that figure object is saved.
## If @var{h} is the handle to a different graphics object, the figure
## containing that graphics object is saved.
##
## All device formats accepted by @code{print} may be used. Common formats
## are:
##
## @table @code
##
## @item ofig
## Octave figure file format (default)
##
## @item mfig
## Two files: Octave m-file @file{filename.m} containing code
## to open Octave figure file @file{filename.ofig}
##
## @item ps
## PostScript
##
## @item eps
## Encapsulated PostScript
##
## @item pdf
## Portable Document Format
##
## @item jpg
## JPEG Image
##
## @item png
## Portable Network Graphics image
##
## @item emf
## Enhanced MetaFile
##
## @item tif
## TIFF Image, compressed
##
## @end table
##
## If @var{fmt} is omitted it is extracted from the extension of
## @var{filename}. The default format when there is no extension is
## @qcode{"ofig"}.
##
## @example
## @group
## clf ();
## surf (peaks);
## saveas (1, "figure1.png");
## @end group
## @end example
##
## @seealso{print, savefig, hgsave, orient}
## @end deftypefn
function saveas (h, filename, fmt)
if (nargin < 2)
print_usage ();
endif
if (! ishghandle (h))
error ("saveas: H must be a graphics handle");
endif
if (! ischar (filename))
error ("saveas: FILENAME must be a string");
endif
if (isfigure (h))
fig = h;
else
fig = ancestor (h, "figure");
endif
default_fmt = "ofig";
if (nargin == 2)
## Attempt to infer format from filename
[~, ~, ext] = fileparts (filename);
if (isempty (ext))
ext = ["." default_fmt];
filename = [filename ext];
endif
fmt = ext(2:end);
endif
if (nargin == 3)
if (! ischar (fmt))
error ("saveas: FMT must be a string");
elseif (isempty (fmt))
fmt = default_fmt;
endif
[~, ~, ext] = fileparts (filename);
if (isempty (ext))
ext = ["." fmt];
filename = [filename ext];
endif
endif
fmt = lower (fmt);
if (any (strcmp (fmt, {"ofig", "fig"})))
savefig (fig, filename);
elseif (any (strcmp (fmt, {"m", "mfig"})))
[d, n] = fileparts (filename);
mfilename = fullfile (d, [n ".m"]);
figfilename = fullfile (d, [n ".ofig"]);
savefig (fig, figfilename);
fid = fopen (mfilename, "wt");
if (fid < 0)
error ("saveas: could not open '%s' for writing", mfilename);
endif
fprintf (fid, ['h = openfig ("' figfilename '");' "\n"]);
fclose (fid);
else
prt_opt = ["-d" fmt];
print (fig, filename, prt_opt);
endif
endfunction
## Test input validation
%!error <Invalid call> saveas ()
%!error <Invalid call> saveas (1)
%!error <H must be a graphics handle> saveas (Inf, "tst.pdf")
%!error <FILENAME must be a string> saveas (0, 1)
%!error <FMT must be a string> saveas (0, "tst.pdf", 1)
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