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########################################################################
##
## Copyright (C) 2010-2022 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 {} {} __ghostscript__ (@var{@dots{}})
## Undocumented internal function.
## @end deftypefn
function [gs_cmd, cleanup_cmd] = __ghostscript__ (varargin)
dos_shell = (ispc () && ! isunix ());
opts.binary = "";
opts.source = "-";
opts.output = "-";
opts.device = "";
opts.epscrop = false;
opts.antialiasing = false;
opts.antialiasing_textalphabits = 4;
opts.antialiasing_graphicsalphabits = 1;
opts.resolution = 150;
opts.papersize = "";
opts.pageoffset = [0 0];
opts.debug = false;
opts.level = [];
opts.prepend = "";
offsetfile = "";
offset_ps = {};
cleanup_cmd = "";
args = varargin;
n = find (cellfun ("isclass", args, "struct"));
if (! isempty (n))
f = fieldnames (args{n});
for m = 1:numel (f)
opts.(f{m}) = args{n}.(f{m});
endfor
args(n) = [];
endif
for n = 1:2:numel (args)
opts.(args{n}) = args{n+1};
endfor
if (isempty (opts.binary))
error ("Octave:print:nogs", "__ghostscript__: 'gs' (Ghostscript) binary is required for specified output format, but binary is not available in PATH");
endif
if (isempty (opts.papersize))
format_for_printer = false;
else
format_for_printer = true;
endif
gs_opts = ["-dQUIET -dNOPAUSE -dBATCH -dSAFER -dAutoRotatePages=/None -sDEVICE=" opts.device];
if (! isempty (opts.level) && ismember (opts.level, [1, 2, 3]))
gs_opts = sprintf ("%s -dLanguageLevel=%d", gs_opts, opts.level);
endif
if (strfind (opts.device, "tiffscaled"))
gs_opts = [gs_opts " -sCompression=lzw"];
endif
if (opts.antialiasing && isempty (strfind (opts.device, "write")))
## Apply anti-aliasing to all bitmap formats/devices
gs_opts = sprintf ("%s -dTextAlphaBits=%d -dGraphicsAlphaBits=%d",
gs_opts, fix (opts.antialiasing_textalphabits),
fix (opts.antialiasing_graphicsalphabits));
gs_opts = sprintf ("%s -r%dx%d", gs_opts, fix ([1, 1] * opts.resolution));
elseif (any (strcmp (opts.device, {"pswrite", "ps2write", "pdfwrite"})))
gs_opts = sprintf ("%s -dEmbedAllFonts=true", gs_opts);
if (strcmp (opts.device, "pdfwrite"))
## Optimize for loading
gs_opts = sprintf ("%s -dOptimize=true", gs_opts);
endif
endif
if (opts.epscrop)
## papersize is specified by the eps bbox
gs_opts = sprintf ("%s -dEPSCrop", gs_opts);
endif
if (format_for_printer)
if (ischar (opts.papersize))
gs_opts = sprintf ("%s -sPAPERSIZE=%s", gs_opts, opts.papersize);
elseif (isnumeric (opts.papersize) && numel (opts.papersize) == 2)
gs_opts = sprintf ("%s -dDEVICEWIDTHPOINTS=%d -dDEVICEHEIGHTPOINTS=%d",
gs_opts, fix (opts.papersize));
if (opts.papersize(1) > opts.papersize(2))
## Lanscape mode: This option will result in automatic rotation of the
## document page if the requested page size matches one
## of the default page sizes
gs_opts = sprintf ("%s -dNORANGEPAGESIZE", gs_opts);
endif
else
error ("Octave:print:badpapersize", "__ghostscript__.m: invalid 'papersize'");
endif
gs_opts = sprintf ("%s -dFIXEDMEDIA", gs_opts);
## "pageoffset" is relative to the coordinates, not the BBox LLHC.
str = sprintf ("%s [%d %d] %s", "<< /Margins [0 0] /.HWMargins [0 0 0 0] /PageOffset",
fix (opts.pageoffset), ">> setpagedevice");
offset_ps = {"%!PS-Adobe-3.0", str, "%%EOF"};
if (isfield (opts, "offsetfile"))
offsetfile = opts.offsetfile;
cleanup_cmd = "";
else
offsetfile = [tempname() ".ps"];
if (dos_shell)
cleanup_cmd = sprintf ('del "%s"', strrep (offsetfile, '/', '\'));
else
cleanup_cmd = sprintf ('rm "%s"', offsetfile);
endif
endif
unwind_protect
fid = fopen (offsetfile, "w");
if (fid == -1)
error ("Octave:print:fopenfailed", "__ghostscript__.m: fopen () failed");
endif
fprintf (fid, "%s\n", offset_ps{:});
unwind_protect_cleanup
status = fclose (fid);
if (status == -1)
error ("Octave:print:fclosefailed", "__ghostscript__.m: fclose () failed");
endif
end_unwind_protect
if (opts.debug)
fprintf ("---- begin %s ----\n", offsetfile);
fprintf ("%s\n", offset_ps{:});
fprintf ("----- end %s -----\n", offsetfile);
endif
endif
if (isempty (opts.output))
cmd = sprintf ("%s %s", opts.binary, gs_opts);
else
cmd = sprintf ('%s %s -sOutputFile="%s"',
opts.binary, gs_opts, opts.output);
endif
if (! isempty (opts.prepend)
&& any (strcmpi (opts.device, {"pswrite", "ps2write", "pdfwrite"})))
## FIXME: Fonts get may be mangled when appending ps/ps2.
## See "How to concatenate several PS files" at the link,
## http://en.wikibooks.org/wiki/PostScript_FAQ
cmd = sprintf ("%s %s", cmd, opts.prepend);
if (isempty (cleanup_cmd))
if (dos_shell)
cleanup_cmd = ["del " strrep(opts.prepend, '/', '\')];
else
cleanup_cmd = ["rm " opts.prepend];
endif
else
if (dos_shell)
cleanup_cmd = sprintf ("%s & del %s", cleanup_cmd,
strrep (opts.prepend, '/', '\'));
else
cleanup_cmd = sprintf ("%s ; rm %s", cleanup_cmd, opts.prepend);
endif
endif
endif
if (! isempty (offsetfile) && format_for_printer)
cmd = sprintf ('%s "%s"', cmd, offsetfile);
endif
if (! isempty (opts.source))
cmd = sprintf ("%s %s", cmd, opts.source);
endif
if (opts.debug)
fprintf ("Ghostscript command: '%s'\n", cmd);
endif
gs_cmd = cmd;
endfunction
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