X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fm%2Fplot%2Fprivate%2F__print_parse_opts__.m;fp=octave_packages%2Fm%2Fplot%2Fprivate%2F__print_parse_opts__.m;h=166f62bc368c20a645b0f5bf040ecb5502b8e184;hp=0000000000000000000000000000000000000000;hb=1c0469ada9531828709108a4882a751d2816994a;hpb=63de9f36673d49121015e3695f2c336ea92bc278

diff --git a/octave_packages/m/plot/private/__print_parse_opts__.m b/octave_packages/m/plot/private/__print_parse_opts__.m
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+++ b/octave_packages/m/plot/private/__print_parse_opts__.m
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+## Copyright (C) 2010-2012 Shai Ayal
+##
+## 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{args} =} __print_parse_opts__ (@var{propname}, @var{propvalue})
+## @deftypefnx {Function File} {@var{args} =} __print_parse_opts__ (@var{struct})
+## Undocumented internal function.
+## @end deftypefn
+
+function arg_st = __print_parse_opts__ (varargin)
+
+  persistent warn_on_missing_binary = true
+
+  arg_st.append_to_file = false;
+  arg_st.canvas_size = [];
+  arg_st.debug = false;
+  arg_st.debug_file = "octave-print-commands.log";
+  arg_st.devopt = "";
+  arg_st.epstool_binary = __quote_path__ (__find_binary__ ("epstool"));
+  arg_st.figure = get (0, "currentfigure");
+  arg_st.fig2dev_binary = __quote_path__ (__find_binary__ ("fig2dev"));
+  arg_st.fontsize = "";
+  arg_st.font = "";
+  arg_st.force_solid = 0; # 0=default, -1=dashed, +1=solid
+  arg_st.formatted_for_printing = false;
+  arg_st.ghostscript.binary = __quote_path__ (__ghostscript_binary__ ());
+  arg_st.ghostscript.debug = false;
+  arg_st.ghostscript.device = "";
+  arg_st.ghostscript.epscrop = true;
+  arg_st.ghostscript.level = [];
+  arg_st.ghostscript.output = "";
+  arg_st.ghostscript.papersize = "";
+  arg_st.ghostscript.pageoffset = [];
+  arg_st.ghostscript.resolution = 150;
+  arg_st.ghostscript.antialiasing = false;
+  arg_st.loose = false;
+  arg_st.lpr_binary = __quote_path__ (__find_binary__ ("lpr"));
+  arg_st.name = "";
+  arg_st.orientation = "";
+  arg_st.pstoedit_binary = __quote_path__ (__find_binary__ ("pstoedit"));
+  arg_st.preview = "";
+  arg_st.printer = "";
+  arg_st.send_to_printer = false;
+  arg_st.special_flag = "textnormal";
+  arg_st.tight_flag = false;
+  arg_st.use_color = 0; # 0=default, -1=mono, +1=color
+
+  if (isunix ())
+    arg_st.lpr_options = "-l";
+  elseif (ispc ())
+    arg_st.lpr_options = "-o l";
+  else
+    arg_st.lpr_options = "";
+  endif
+  arg_st.unlink = {};
+
+  if (nargin > 0 && isfigure (varargin{1}))
+    arg_st.figure = varargin{1};
+    varargin(1) = [];
+  endif
+
+  for i = 1:numel(varargin)
+    arg = strtrim (varargin{i});
+    if (ischar (arg))
+      if (strcmp (arg, "-color"))
+        arg_st.use_color = 1;
+      elseif (strcmp (arg, "-append"))
+        arg_st.append_to_file = true;
+      elseif (strcmp (arg, "-mono"))
+        arg_st.use_color = -1;
+      elseif (strcmp (arg, "-solid"))
+        arg_st.force_solid = 1;
+      elseif (strcmp (arg, "-dashed"))
+        arg_st.force_solid = -1;
+      elseif (strncmp (arg, "-portrait", numel (arg)))
+        arg_st.orientation = "portrait";
+      elseif (strncmp (arg, "-landscape", numel (arg)))
+        arg_st.orientation = "landscape";
+      elseif (strcmp (arg, "-loose"))
+        arg_st.loose = true;
+        arg_st.tight_flag = false;
+      elseif (strcmp (arg, "-tight"))
+        arg_st.loose = false;
+        arg_st.tight_flag = true;
+      elseif (strcmp (arg, "-textspecial"))
+        arg_st.special_flag = "textspecial";
+      elseif (any (strcmp (arg, {"-interchange", "-metafile", "-pict", "-tiff"})))
+        arg_st.preview = arg(2:end);
+      elseif (strncmp (arg, "-debug", 6))
+        arg_st.debug = true;
+        arg_st.ghostscript.debug = true;
+        if (length (arg) > 7)
+          arg_st.debug_file = arg(8:end);
+        endif
+      elseif (length (arg) > 2 && arg(1:2) == "-d")
+        arg_st.devopt = tolower (arg(3:end));
+      elseif (length (arg) > 2 && arg(1:2) == "-P")
+        arg_st.printer = arg;
+      elseif (strncmp (arg, "-EPSTOOL:", 9))
+        arg_st.epstool_binary = arg{10:end};
+      elseif (strncmp (arg, "-FIG2DEV:", 9))
+        arg_st.fig2dev_binary = arg{10:end};
+      elseif (strncmp (arg, "-PSTOEDIT:", 9))
+        arg_st.pstoedit_binary = arg{10:end};
+      elseif ((length (arg) > 2) && arg(1:2) == "-G")
+        arg_st.ghostscript.binary = file_in_path (getenv ("PATH"), arg(3:end));
+        if (isempty (arg_st.ghostscript.binary))
+          error ("print: Ghostscript binary ""%s"" could not be located",
+                 arg(3:end));
+        else
+          arg_st.ghostscript_binary = __quote_path__ (arg_st.ghostscript_binary);
+        endif
+      elseif (length (arg) > 2 && arg(1:2) == "-F")
+        idx = rindex (arg, ":");
+        if (idx)
+          arg_st.font = arg(3:idx-1);
+          arg_st.fontsize = str2num (arg(idx+1:end));
+        else
+          arg_st.font = arg(3:end);
+        endif
+      elseif (length (arg) > 2 && arg(1:2) == "-S")
+        arg_st.canvas_size = str2num (arg(3:end));
+      elseif (length (arg) > 2 && arg(1:2) == "-r")
+        arg_st.ghostscript.resolution = str2double (arg(3:end));
+      elseif (length (arg) > 2 && arg(1:2) == "-f")
+        arg_st.figure = str2num (arg(3:end));
+      elseif (length (arg) >= 1 && arg(1) == "-")
+        error ("print: unknown option `%s'", arg);
+      elseif (length (arg) > 0)
+        arg_st.name = arg;
+      endif
+    elseif (isfigure (arg))
+      arg_st.figure = arg;
+    else
+      error ("print: expecting inputs to be character string options or a figure handle");
+    endif
+  endfor
+
+  if (arg_st.ghostscript.resolution == 0)
+    ## Do as Matlab does.
+    arg_st.ghostscript.resolution = get (0, "screenpixelsperinch");
+  endif
+
+  if (isempty (arg_st.orientation))
+    if (isfigure (arg_st.figure))
+      arg_st.orientation = get (arg_st.figure, "paperorientation");
+    else
+      ## Allows tests to be run without error.
+      arg_st.orientation = "portrait";
+    endif
+  endif
+
+  if (isempty (arg_st.ghostscript.binary))
+    arg_st.ghostscript.binary = __ghostscript_binary__ ();
+  endif
+
+  dot = rindex (arg_st.name, ".");
+  if (isempty (arg_st.devopt))
+    if (dot == 0)
+      arg_st.devopt = "psc";
+    else
+      arg_st.devopt = tolower (arg_st.name(dot+1:end));
+    endif
+  endif
+
+  if (arg_st.use_color == 0)
+    if (any (strcmp ({"ps", "ps2", "eps", "eps2"}, arg_st.devopt)))
+      arg_st.use_color = -1;
+    else
+      arg_st.use_color = 1;
+    endif
+  endif
+
+  if (strcmp (arg_st.devopt, "tex"))
+    arg_st.devopt = "epslatex";
+  elseif (strcmp (arg_st.devopt, "ill"))
+    arg_st.devopt = "aifm";
+  elseif (strcmp (arg_st.devopt, "cdr"))
+    arg_st.devopt = "corel";
+  elseif (strcmp (arg_st.devopt, "meta"))
+    arg_st.devopt = "emf";
+  elseif (strcmp (arg_st.devopt, "jpg"))
+    arg_st.devopt = "jpeg";
+  endif
+
+  dev_list = {"aifm", "corel", "fig", "png", "jpeg", ...
+              "gif", "pbm", "pbmraw", "dxf", "mf", ...
+              "svg", "hpgl", "ps", "ps2", "psc", ...
+              "psc2", "eps", "eps2", "epsc", "epsc2", ...
+              "emf", "pdf", "pslatex", "epslatex", "epslatexstandalone", ...
+              "pslatexstandalone", "pdflatexstandalone", ...
+              "pstex", "tiff", "tiffn" "tikz", "pcxmono", ...
+              "pcx24b", "pcx256", "pcx16", "pgm", "pgmraw", ...
+              "ppm", "ppmraw", "pdflatex", "texdraw", ...
+              "pdfcairo", "pngcairo", "pstricks", ...
+              "epswrite", "pswrite", "ps2write", "pdfwrite"};
+
+  suffixes = {"ai", "cdr", "fig", "png", "jpg", ...
+              "gif", "pbm", "pbm", "dxf", "mf", ...
+              "svg", "hpgl", "ps", "ps", "ps", ...
+              "ps", "eps", "eps", "eps", "eps", ...
+              "emf", "pdf", "tex", "tex", "tex", ...
+              "tex", "tex", ...
+              "ps", "tiff", "tiff", "tikz", "pcx", ...
+              "pcx", "pcx", "pcx", "pgm", "pgm", ...
+              "ppm", "ppm", "tex", "tex", ...
+              "pdf", "png", "tex", ...
+              "eps", "ps", "ps", "pdf"};
+
+  if (isfigure (arg_st.figure))
+    __graphics_toolkit__ = get (arg_st.figure, "__graphics_toolkit__");
+  else
+    ## Allow tests when no figures are present.
+    __graphics_toolkit__ = get (0, "defaultfigure__graphics_toolkit__");
+  endif
+
+  if (strcmp (__graphics_toolkit__, "gnuplot")
+      && __gnuplot_has_feature__ ("epslatex_implies_eps_filesuffix"))
+    suffixes(strncmp (dev_list, "epslatex", 8)) = {"eps"};
+  endif
+
+  match = strcmpi (dev_list, arg_st.devopt);
+  if (any (match))
+    default_suffix = suffixes {match};
+  else
+    default_suffix = arg_st.devopt;
+  endif
+
+  if (dot == 0 && ! isempty (arg_st.name))
+    arg_st.name = strcat (arg_st.name, ".", default_suffix);
+  endif
+
+  if (arg_st.append_to_file)
+    if (isempty (arg_st.name))
+      arg_st.append_to_file = false;
+    elseif (any (strcmpi (arg_st.devopt, {"eps", "eps2", "epsc", "epsc2", ...
+                                          "ps", "ps2", "psc", "psc2", "pdf"})))
+      have_ghostscript = ! isempty (__ghostscript_binary__ ());
+      if (have_ghostscript)
+        file_exists = ((numel (dir (arg_st.name)) == 1)
+                       && (! isdir (arg_st.name)));
+        if (! file_exists)
+          arg_st.append_to_file = false;
+        endif
+      else
+        arg_st.append_to_file = false;
+        warning ("print.m: appended output requires ghostscript to be installed");
+      endif
+    else
+      warning ("print.m: appended output is not supported for device '%s'",
+               arg_st.devopt);
+      arg_st.append_to_file = false;
+    endif
+  endif
+
+  if (! isempty (arg_st.printer) || isempty (arg_st.name))
+    arg_st.send_to_printer = true;
+  endif
+
+  if (any (strcmp (arg_st.devopt, {"ps", "ps2", "psc", "psc2", "pdf"})))
+    arg_st.formatted_for_printing = true;
+  endif
+
+  aliases = gs_aliases ();
+  if (any (strcmp (arg_st.devopt, fieldnames (aliases))))
+    arg_st.devopt = aliases.(arg_st.devopt);
+  endif
+
+  ## FIXME - eps2 & epsc2 needs to be handled
+  if (strcmp (arg_st.devopt, "pswrite"))
+    arg_st.ghostscript.level = 1;
+  elseif (strcmp (arg_st.devopt, "ps2write"))
+    arg_st.ghostscript.level = 2;
+  endif
+
+  if ((any (strcmp (arg_st.devopt, gs_device_list))
+       && ! arg_st.formatted_for_printing)
+      || any (strcmp (arg_st.devopt, {"pswrite", "ps2write", "pdfwrite"})))
+    ## Use ghostscript for graphic formats
+    arg_st.ghostscript.device = arg_st.devopt;
+    arg_st.ghostscript.output = arg_st.name;
+    arg_st.ghostscript.antialiasing = true;
+    if (arg_st.formatted_for_printing)
+      arg_st.ghostscript.epscrop = ! arg_st.loose;
+    else
+      ## pstoedit throws errors if the EPS file isn't cropped
+      arg_st.ghostscript.epscrop = true;
+    endif
+  elseif (all (! strcmp (arg_st.devopt, dev_list)))
+    ## Assume we are formating output for a printer
+    arg_st.formatted_for_printing = true;
+    arg_st.ghostscript.device = arg_st.devopt;
+    arg_st.ghostscript.output = arg_st.name;
+    arg_st.ghostscript.antialiasing = false;
+    arg_st.ghostscript.epscrop = ! arg_st.loose;
+  endif
+
+  if (isempty (arg_st.canvas_size))
+    if (isfigure (arg_st.figure))
+      [arg_st.ghostscript.papersize, paperposition] = ...
+                           gs_papersize (arg_st.figure, arg_st.orientation);
+    else
+      ## allows tests to be run
+      arg_st.ghostscript.papersize = "letter";
+      paperposition = [0.25, 2.50, 8.00, 6.00] * 72;
+    endif
+    arg_st.canvas_size = paperposition(3:4);
+    if (strcmp (__graphics_toolkit__, "gnuplot") && ! arg_st.ghostscript.epscrop)
+      arg_st.ghostscript.pageoffset = paperposition(1:2) - 50;
+    else
+      arg_st.ghostscript.pageoffset = paperposition(1:2);
+    endif
+  else
+    ## Convert canvas size to points from pixles.
+    arg_st.canvas_size = arg_st.canvas_size * 72 / arg_st.ghostscript.resolution;
+    arg_st.ghostscript.papersize = arg_st.canvas_size;
+    arg_st.ghostscript.epscrop = true;
+    arg_st.ghostscript.pageoffset = [0, 0];
+  endif
+
+  if (arg_st.formatted_for_printing)
+    arg_st.ghostscript.resolution = [];
+  else
+    arg_st.ghostscript.papersize = "";
+    arg_st.ghostscript.pageoffset = [0, 0];
+  endif
+
+  if (warn_on_missing_binary)
+    if (isempty (arg_st.ghostscript.binary))
+      warning ("print:missing_gs", "print.m: Ghostscript binary is not available.\nOnly eps output is available.");
+    else
+      if (isempty (arg_st.epstool_binary))
+        warning ("print:missing_epstool", "print.m: epstool binary is not available.\nSome output formats are not available.");
+      endif
+      if (isempty (arg_st.fig2dev_binary))
+        warning ("print:missing_fig2dev", "print.m: fig2dev binary is not available.\nSome output formats are not available.");
+      endif
+      if (isempty (arg_st.pstoedit_binary))
+        warning ("print:missing_pstoedit", "print.m: pstoedit binary is not available.\nSome output formats are not available.");
+      endif
+    endif
+    warn_on_missing_binary = false;
+  endif
+
+endfunction
+
+## Test blocks are not allowed (and not needed) for private functions
+#%!test
+%! opts = __print_parse_opts__ ();
+%! assert (opts.devopt, "pswrite");
+%! assert (opts.use_color, 1);
+%! assert (opts.send_to_printer, true);
+%! assert (opts.canvas_size, [576, 432]);
+%! assert (opts.ghostscript.device, "pswrite")
+
+#%!test
+%! opts = __print_parse_opts__ ("test.pdf", "-S640,480");
+%! assert (opts.canvas_size, [307.2, 230.4], 0.1);
+
+#%!test
+%! opts = __print_parse_opts__ ("-dpsc", "-append", "-loose");
+%! assert (opts.devopt, "pswrite");
+%! assert (opts.send_to_printer, true);
+%! assert (opts.use_color, 1);
+%! assert (opts.append_to_file, false);
+%! assert (opts.ghostscript.device, "pswrite")
+%! assert (opts.ghostscript.epscrop, false);
+
+#%!test
+%! opts = __print_parse_opts__ ("-deps", "-tight");
+%! assert (opts.tight_flag, true);
+%! assert (opts.send_to_printer, true);
+%! assert (opts.use_color, -1);
+%! assert (opts.ghostscript.device, "")
+
+#%!test
+%! opts = __print_parse_opts__ ("-djpg", "foobar", "-mono", "-loose");
+%! assert (opts.devopt, "jpeg")
+%! assert (opts.name, "foobar.jpg")
+%! assert (opts.ghostscript.device, "jpeg")
+%! assert (opts.ghostscript.epscrop, true);
+%! assert (opts.ghostscript.papersize, "");
+%! assert (opts.ghostscript.pageoffset, [0, 0]);
+%! assert (opts.send_to_printer, false);
+%! assert (opts.printer, "");
+%! assert (opts.use_color, -1);
+
+#%!test
+%! opts = __print_parse_opts__ ("-ddeskjet", "foobar", "-mono", "-Pmyprinter");
+%! assert (opts.ghostscript.output, "foobar.deskjet")
+%! assert (opts.ghostscript.device, "deskjet")
+%! assert (opts.devopt, "deskjet")
+%! assert (opts.send_to_printer, true);
+%! assert (opts.printer, "-Pmyprinter");
+%! assert (opts.use_color, -1);
+
+#%!test
+%! opts = __print_parse_opts__ ("-f5", "-dljet3");
+%! assert (opts.ghostscript.device, "ljet3")
+%! assert (strfind (opts.ghostscript.output, ".ljet3"))
+%! assert (opts.devopt, "ljet3")
+%! assert (opts.send_to_printer, true);
+%! assert (opts.figure, 5)
+
+function cmd = __quote_path__ (cmd)
+  if (any (cmd == " ") && ! (cmd(1) == """" && cmd(end) == """"))
+    cmd = strcat ("""", strrep (cmd, """", """"""), """");
+  endif
+endfunction
+
+function gs = __ghostscript_binary__ ()
+
+  persistent ghostscript_binary = ""
+  persistent warn_on_no_ghostscript = true
+  persistent warn_on_bad_gsc = true
+
+  if (isempty (ghostscript_binary))
+    GSC = getenv ("GSC");
+    if (exist (GSC, "file")
+        || (! isempty (GSC) && file_in_path (getenv ("PATH"), GSC)))
+      gs_binaries = {GSC};
+    elseif (! isempty (GSC) && warn_on_bad_gsc)
+      warning ("print:badgscenv",
+               "print.m: GSC environment variable not set properly");
+      warn_on_bad_gsc = false;
+      gs_binaries = {};
+    else
+      gs_binaries = {};
+    endif
+    if (isunix ())
+      ## Unix - Includes Mac OSX and Cygwin.
+      gs_binaries = horzcat (gs_binaries, {"gs", "gs.exe"});
+    else
+      ## pc - Includes Win32 and mingw.
+      gs_binaries = horzcat (gs_binaries, {"gs.exe", "gswin32c.exe", "mgs.exe"});
+    endif
+    n = 0;
+    while (n < numel (gs_binaries) && isempty (ghostscript_binary))
+      n = n + 1;
+      ghostscript_binary = file_in_path (getenv ("PATH"), gs_binaries{n});
+    endwhile
+    if (warn_on_no_ghostscript && isempty (ghostscript_binary))
+      warning ("print:noghostscript",
+               "print.m: ghostscript not found in PATH");
+      warn_on_no_ghostscript = false;
+    endif
+  endif
+
+  gs = ghostscript_binary;
+
+endfunction
+
+function bin = __find_binary__ (binary)
+
+  persistent data = struct ()
+
+  if (! isfield (data, binary))
+    ## Reinitialize when `user_binaries' is present.
+    data.(binary).bin = "";
+    data.(binary).warn_on_absence = false;
+  endif
+
+  if (isempty (data.(binary).bin))
+    if (isunix ())
+      ## Unix - Includes Mac OSX and Cygwin.
+      binaries = strcat (binary, {"", ".exe"});
+    else
+      ## pc - Includes Win32 and mingw.
+      binaries = strcat (binary, {".exe"});
+    endif
+    n = 0;
+    while (n < numel (binaries) && isempty (data.(binary).bin))
+      n = n + 1;
+      data.(binary).bin = file_in_path (getenv ("PATH"), binaries{n});
+    endwhile
+    if (isempty (data.(binary).bin) && data.(binary).warn_on_absence)
+      warning (sprintf ("print:no%s", binary),
+               "print.m: '%s' not found in PATH", binary);
+      data.(binary).warn_on_absence = false;
+    endif
+  endif
+
+  bin = data.(binary).bin;
+
+endfunction
+
+function [papersize, paperposition] = gs_papersize (hfig, paperorientation)
+  persistent papertypes papersizes
+
+  if (isempty (papertypes))
+    papertypes = {"usletter", "uslegal",     "a0",     "a1", ...
+                        "a2",      "a3",     "a4",     "a5", ...
+                        "b0",      "b1",     "b2",     "b3", ...
+                        "b4",      "b5", "arch-a", "arch-b", ...
+                    "arch-c",  "arch-d", "arch-e",      "a", ...
+                         "b",       "c",      "d",      "e", ...
+                   "tabloid"};
+    papersizes = [ 8.5, 11.0;  8.5, 14.0; 33.1, 46.8; 23.4, 33.1;
+                  16.5, 23.4; 11.7, 16.5;  8.3, 11.7;  5.8,  8.3;
+                  39.4, 55.7; 27.8, 39.4; 19.7, 27.8; 13.9, 19.7;
+                   9.8, 13.9;  6.9,  9.8;  9.0, 12.0; 12.0, 18.0;
+                  18.0, 24.0; 24.0, 36.0; 36.0, 48.0;  8.5, 11.0;
+                  11.0, 17.0; 18.0, 24.0; 24.0, 36.0; 36.0, 48.0;
+                  11.0, 17.0] * 72;
+  endif
+
+  papertype = get (hfig, "papertype");
+  paperunits = get (hfig, "paperunits");
+  paperposition = get (hfig, "paperposition");
+  if (strcmp (papertype, "<custom>"))
+    papersize = get (hfig, "papersize");
+    papersize = convert2points (papersize , paperunits);
+  else
+    papersize = papersizes (strcmp (papertypes, papertype), :);
+  endif
+
+  if (strcmp (paperunits, "normalized"))
+    paperposition = paperposition .* papersize([1,2,1,2]);
+  else
+    paperposition = convert2points (paperposition, paperunits);
+  endif
+
+  ## FIXME - This will be obsoleted by listeners for paper properties.
+  ##         Papersize is tall when portrait,and wide when landscape.
+  if ((papersize(1) > papersize(2) && strcmpi (paperorientation, "portrait"))
+      || (papersize(1) < papersize(2) && strcmpi (paperorientation, "landscape")))
+    papersize = papersize ([2,1]);
+    paperposition = paperposition([2,1,4,3]);
+  endif
+
+  if ((! strcmp (papertype, "<custom>")) && (strcmp (paperorientation, "portrait")))
+    ## For portrait use the ghostscript name
+    papersize = papertype;
+    papersize(papersize=="-") = "";
+    papersize = strrep (papersize, "us", "");
+    switch (papersize)
+    case "a"
+      papersize = "letter";
+    case {"b", "tabloid"}
+      papersize = "11x17";
+    case {"c", "d", "e"}
+      papersize = strcat ("arch", papersize);
+    endswitch
+    if (strncmp (papersize, "arch", 4))
+      papersize(end) = upper (papersize(end));
+    endif
+  endif
+
+endfunction
+
+function value = convert2points (value, units)
+    switch (units)
+    case "inches"
+      value = value * 72;
+    case "centimeters"
+      value = value * 72 / 2.54;
+    case "normalized"
+      error ("print:customnormalized",
+             "print.m: papersize=='<custom>' and paperunits='normalized' may not be combined");
+    endswitch
+endfunction
+
+function device_list = gs_device_list ();
+  ## Graphics formats/languages, not priners.
+  device_list = {"bmp16"; "bmp16m"; "bmp256"; "bmp32b"; "bmpgray"; ...
+                 "epswrite"; "jpeg"; "jpegcymk"; "jpeggray"; "pbm"; ...
+                 "pbmraw"; "pcx16"; "pcx24b"; "pcx256"; "pcx2up"; ...
+                 "pcxcmyk"; "pcxgray"; "pcxmono"; "pdfwrite"; "pgm"; ...
+                 "pgmraw"; "pgnm"; "pgnmraw"; "png16"; "png16m"; ...
+                 "png256"; "png48"; "pngalpha"; "pnggray"; "pngmono"; ...
+                 "pnm"; "pnmraw"; "ppm"; "ppmraw"; "ps2write"; ...
+                 "pswrite"; "tiff12nc"; "tiff24nc"; "tiff32nc"; ...
+                 "tiffcrle"; "tiffg3"; "tiffg32d"; "tiffg4"; ...
+                 "tiffgray"; "tifflzw"; "tiffpack"; "tiffsep"};
+endfunction
+
+function aliases = gs_aliases ();
+  ## Aliases for other devices: "bmp", "png", "tiff", "tiffn", "pdf",
+  ##                            "ps", "ps2", "psc", "psc2"
+  ##
+  ## eps, epsc, eps2, epsc2 are not included here because those are
+  ## are generated by the graphics toolkit.
+  aliases.bmp = "bmp32b";
+  aliases.pdf = "pdfwrite";
+  aliases.png = "png16m";
+  aliases.ps = "pswrite";
+  aliases.ps2 = "ps2write";
+  aliases.psc = "pswrite";
+  aliases.psc2 = "ps2write";
+  aliases.tiff = "tiff24nc";
+  aliases.tiffn = "tiff24nc";
+endfunction
+