path: root/lib/pdf_info.ps

%!PS
% Copyright (C) 2001-2021 Artifex Software, Inc.
% All Rights Reserved.
%
% This software is provided AS-IS with no warranty, either express or
% implied.
%
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
% CA 94945, U.S.A., +1(415)492-9861, for further information.
%
%
% $Id: pdf_info.ps 6300 2005-12-28 19:56:24Z alexcher $

% Dump some info from a PDF file

% usage: gs -dNODISPLAY -q -sFile=____.pdf [-dDumpMediaSizes=false] [-dDumpFontsNeeded=false] [-dDumpXML]
%                                          [-dDumpFontsUsed [-dShowEmbeddedFonts] ] lib/pdf_info.ps

128 dict begin

/QUIET true def		% in case they forgot

/showoptions {
  (           where "options" are:) =
  (           -dDumpMediaSizes=false    (default true) MediaBox and CropBox for each page) =
  (           -dDumpFontsNeeded=false   (default true)Fonts used, but not embedded) =
  (           -dDumpXML                 print the XML Metadata from the PDF, if present) =
  (           -dDumpFontsUsed           List all fonts used) =
  (           -dShowEmbeddedFonts       only meaningful with -dDumpFontsUsed) =
  (\n          If no options are given, the default is -dDumpMediaSizes -dDumpFontsNeeded) =
  () =
  flush
} bind def

/DumpMediaSizes where { pop } { /DumpMediaSizes true def } ifelse
/DumpFontsNeeded where { pop } { /DumpFontsNeeded true def } ifelse

[ {.shellarguments} stopped not
  {
    { counttomark 1 eq {
        dup 0 get (-) 0 get ne {
          % File specified on the command line using:  -- lib/pdf_info.ps infile.pdf
          /File exch def
          false   % don't show usage
        } {
          true    % show usage and quit
        } ifelse
      } { true } ifelse
      {
        (\n*** Usage: gs [options] -- lib/pdf_info.ps infile.pdf  ***\n\n) print
        showoptions
        quit
      } if
    } if
  } if
/File where not {
  (\n   *** Missing input file name \(use -sFile=____.pdf\)\n) =
  (    usage: gs -dNODISPLAY -q -sFile=____.pdf [ options ] lib/pdf_info.ps\n) =
  showoptions
  quit
} if
cleartomark		% discard the dict from --where--

% ---- No more executable code on the top level after this line -----
% ---- except 2 lines at the very end                           -----

% Write a character to the standard output.
/putchar [ % int -> -
  (%stdout) (w) file
  /exch cvx /write cvx
] cvx bind def

% Write U+xxxx to the standard output as UTF-8.
/put-ucode { % int -> -
  dup 16#80 ge {
    dup 16#800 ge {
      dup 16#10000 ge {
        dup -18 bitshift 16#f0 or putchar
        dup -12 bitshift 16#3f and 16#80 or putchar
      } {
        dup -12 bitshift 16#e0 or putchar
      } ifelse
      dup -6  bitshift 16#3f and 16#80 or putchar
    } {
      dup -6 bitshift 16#C0 or putchar
    } ifelse
    16#3f and 16#80 or
  } if
  putchar
} bind def

% PDFDocEncoding to U+xxxx decoding table.
/doc-to-ucode [
  0 1 23 {} for
  16#2d8 16#2c7 16#2c6 16#2d9 16#2dd 16#2db 16#2da 16#2dc
  32 1 127 {} for
  16#2022 16#2020 16#2021 16#2026 16#2014 16#2013 16#192
  16#2044 16#2039 16#203a 16#2212 16#2030 16#201e 16#201c 
  16#201d 16#2018 16#2019 16#201a 16#2122 16#fb01 16#fb02
  16#141 16#152 16#160 16#178 16#17d 16#131 16#142 16#153
  16#161 16#17e 0 16#20ac
  161 1 255 {} for
] readonly def

% Convert a doc string from PDFDocEncoding or UTF-16BE to UTF-8
% and write it to standard output. 
/write-doc-string { % (string) -> -
  1024 string cvs <feff> anchorsearch {
    pop
    0 exch                 % hi16 (str) 
    0 2 2 index length 2 sub {
      2 copy 2 copy        % hi16 (str) i (str) i (str) i
      get 256 mul 3 1 roll % hi16 (str) i hi*256 (str) i
      1 add get add        % hi16 (str) i 256*hi+lo
      dup 16#fc00 and dup  % hi16 (str) i 256*hi+lo tag tag
      16#d800 eq { % High surrogate
        pop
        16#3ff and
        10 bitshift
        16#10000 add       % hi16  (str) i hi16'
        4 1 roll           % hi16' hi16 (str) i
        pop exch pop       % hi16' (str)
      } {
        16#dc00 eq { % Low surrogate
          16#3ff and       % hi16 (str) i (256*hi+lo)&0x3ff
          4 -1 roll add    % (str) i (256*hi+lo)&0x3ff+hi16
          put-ucode        % (str) i
          pop 0 exch       % 0 (str)
        } { % BMP plane
          put-ucode        % hi16 (str) i
          pop              % hi16 (str)
        } ifelse
      } ifelse
    } for
    pop pop                % -
  } {
    { //doc-to-ucode exch get put-ucode 
    } forall
  } ifelse
} bind def

%% When checking Resources for Font objects, we must ensure that we don't end
%% up following a circular reference. Circular references in Resources should
%% not, of course, be present but we've seen a number of cases. If we do detect
%% a circular reference, then stop checking that chain.

/oforce_no_circular {
  dup type /packedarraytype eq {
    dup 0 get
    currentdict /ProcessedResources known {
      dup ProcessedResources exch known {
        pop pop //null
      } {
        dup ProcessedResources 3 1 roll put
        oforce
      } ifelse
    } {
      oforce
    } ifelse
  } {
    oforce
  } ifelse
} bind def

/dump-pdf-info {    % (fname) -> -
  () = (        ) print print ( has ) print
  PDFPageCount dup =print 10 mod 1 eq { ( page.\n) } { ( pages\n) } ifelse = flush

  Trailer /Root oget /AcroForm knownoget {
    /XFA knownoget {
      (File uses XFA forms.\n\n) print
      pop
    } if
  } if

  /DumpXML where {
    pop
    Trailer /Root oget /Metadata knownoget {
      //false resolvestream
      { dup 256 string readstring exch print not { exit } if } loop
      pop		% done with the stream
      (\n_____________________________________________________________) =
      flush
    } if
  } if

  % Print out the "Info" dictionary if present
  Trailer /Info knownoget {
     dup /Title knownoget { (Title: ) print write-doc-string () = flush } if
     dup /Author knownoget { (Author: ) print write-doc-string () = flush } if
     dup /Subject knownoget { (Subject: ) print write-doc-string () = flush } if
     dup /Keywords knownoget { (Keywords: ) print write-doc-string () = flush } if
     dup /Creator knownoget { (Creator: ) print write-doc-string () = flush } if
     dup /Producer knownoget { (Producer: ) print write-doc-string () = flush } if
     dup /CreationDate knownoget { (CreationDate: ) print write-doc-string () = flush } if
     dup /ModDate knownoget { (ModDate: ) print write-doc-string () = flush } if
     dup /Trapped knownoget { (Trapped: ) print write-doc-string () = flush } if
     pop
  } if

} bind def

% <page index> <page dict> dump-media-sizes -
/dump-media-sizes {
  DumpMediaSizes {
    () =
    % Print out the Page Size info for each page.
    (Page ) print =print
    dup /UserUnit pget {
      ( UserUnit: ) print =print
    } if
    dup /MediaBox pget {
      ( MediaBox: ) print oforce_array ==only
    } if
    dup /CropBox pget {
      ( CropBox: ) print oforce_array ==only
    } if
    dup /BleedBox pget {
      ( BleedBox: ) print oforce_array ==only
    } if
    dup /TrimBox pget {
      ( TrimBox: ) print oforce_array ==only
    } if
    dup /ArtBox pget {
      ( ArtBox: ) print oforce_array ==only
    } if
    dup /Rotate pget {
       (    Rotate = ) print =print
    } if
    dup /Annots pget {
       pop
        (     Page contains Annotations) print
    } if
    dup pageusestransparency {
        (     Page uses transparency features) print
    } if
    dup pagespotcolors
    dup length 0 gt {
      (\n    Page Spot colors: ) =
      << /Black 0 /Cyan 0 /Magenta 0 /Yellow 0 >> exch
      {
        pop	% discard the value
        1 index 1 index known not {	% check if colorant is a standard one
          (        ) print
          (') print =print (') =
        } {
          pop	% ignore this standard colorant
        } ifelse
      } forall
      pop	% discard dict of standard colorants
    } {
      pop
    } ifelse
    pop		% done with pagedict
    () = flush
  }
  {
    pop pop
  } ifelse
} bind def

% List of standard font names for use when we are showing the FontsNeeded
/StdFontNames [
 /Times-Roman /Helvetica /Courier /Symbol
 /Times-Bold /Helvetica-Bold /Courier-Bold /ZapfDingbats
 /Times-Italic /Helvetica-Oblique /Courier-Oblique
 /Times-BoldItalic /Helvetica-BoldOblique /Courier-BoldOblique
] def

/res-type-dict 10 dict begin

  /Font {
    {
      exch pop oforce_no_circular
      dup //null ne {
        dup /DescendantFonts knownoget {
           exch pop 0 get oforce_no_circular
           %% Check to see if a potentail circular reference was detected. This could be a
           %% false positive caused by other fonts using the same DescendantFont(s), but if
           %% so then we've already cehcked them anyway.
           dup //null eq { pop << >>} if
        } if
        dup /FontDescriptor knownoget {
          dup /FontFile known 1 index /FontFile2 known or exch /FontFile3 known or
          /ShowEmbeddedFonts where { pop pop //false } if {
            pop			% skip embedded fonts
          } {
            /BaseFont knownoget { %  not embedded
              2 index exch //null put
            } if
          } ifelse
        } {
          /BaseFont knownoget { % no FontDescriptor, not embedded
            2 index exch //null put
          } if
        } ifelse
      } {
        pop
      } ifelse
    } forall	% traverse the dictionary
  } bind def

  /XObject {
    {
      exch pop oforce_no_circular
      dup //null ne {
        dup /Subtype knownoget {
          /Form eq {
            /Resources knownoget {
              get-fonts-from-res
            } if
          } {
            pop
          } ifelse
        } {
          pop
        } ifelse
      } {
        pop
      } ifelse
    } forall
  } bind def

  /Pattern {
    {
      exch pop oforce_no_circular
      dup //null ne {
        /Resources knownoget {
          get-fonts-from-res
        } if
      } {
        pop
      } ifelse
    } forall
  } bind def
currentdict end readonly def

% <dict for fonts> <<res-dict>> get-fonts-from-res -
/get-fonts-from-res {
  oforce_no_circular
  dup //null ne {
    {
      oforce_no_circular
      dup //null ne {
        //res-type-dict 3 -1 roll
        .knownget {
          exec
        } {
          pop
        } ifelse
      } {
        pop pop
      } ifelse
    } forall
  } {
    pop
  } ifelse
} bind def

currentdict /res-type-dict undef

/getPDFfonts {	%	<dict for fonts> <page dict> getPDFfonts -
  /ProcessedResources 10 dict def
  dup /Resources pget { get-fonts-from-res } if
  /Annots knownoget {
    { oforce_no_circular
      dup //null ne {
        /AP knownoget {
          { exch pop oforce_no_circular
            dup //null ne {
              dup /Resources knownoget {
                get-fonts-from-res
              } if
              { exch pop oforce_no_circular
                dup type /dicttype eq {
                  /Resources knownoget {
                    get-fonts-from-res
                  } if
                } {
                  pop
                } ifelse
              } forall
            } {
              pop
            } ifelse
          } forall
        } if
      } {
        pop
      } ifelse
    } forall
  } if
  pop
  currentdict /ProcessedResources undef
} bind def

% If running with -dSAFER, .sort may not be present. Define a (slower) PS alternative
systemdict /.sort known not {
% <array> <lt-proc> .sort <array>
 /.sort
   { 1 index length 1 sub -1 1
       { 2 index exch 2 copy get 3 copy % arr proc arr i arr[i] arr i arr[i]
         0 1 3 index 1 sub
           { 3 index 1 index get        % arr proc arr i arr[i] arr imax amax j arr[j]
             2 index 1 index 10 index exec
               {                        % ... amax < arr[j]
                 4 2 roll
               }
             if pop pop
           }
         for                            % arr proc arr i arr[i] arr imax amax
         4 -1 roll exch 4 1 roll put put
       }
     for
     pop
   } bind def
} if

/dump-fonts-used { % <dict for fonts> dump-fonts-used -
  % If DumpFontsUsed is not true, then remove the 'standard' fonts from the list
  systemdict /DumpFontsUsed known not {
    StdFontNames {
      1 index 1 index known { 1 index 1 index undef } if
      pop
    } forall
  } if

  % Now dump the FontsUsed dict into an array so we can sort it.
  [ 1 index { pop } forall ]
  { 100 string cvs exch 100 string cvs exch lt } .sort

  systemdict /DumpFontsUsed known
  {
    (\nFont or CIDFont resources used (plain name and ASCIIHEX string representation):) =
    { 128 string cvs dup print (    ) print (<) print 128 string cvs {16 8 string cvrs print} forall (>) print (\n) print} forall
  } {
    DumpFontsNeeded {
      dup length 0 gt {
        (\nFonts Needed that are not embedded \(system fonts required\):) =
        { (    ) print 128 string cvs dup print (    ) print (<) print {16 8 string cvrs print} forall (>) print (\n) print} forall
      } {
        pop
        (\nNo system fonts are needed.) =
      } ifelse
    } {
      pop
    } ifelse
  } ifelse
  pop
} bind def

% Copy selected subfiles to temporary files and return the file names
% as a PostScript names to protect them from restore.
% Currently, all PDF files in the Portfolio are extracted and returned.
%
% - pdf_collection_files [ /temp_file_name ... /temp_file_name
/pdf_collection_files {
  mark
  Trailer /Root oget
  dup /Collection oknown {
    /Names knownoget {
      /EmbeddedFiles knownoget {
        pdf_collection_names
      } if
    } if
  } {
    pop
  } ifelse
} bind def

% Output all the info about the file
/dump {  % (title) -> -
  /PDFPageCount pdfpagecount def
  dump-pdf-info
  % dict will be populated with fonts through a call to 'getPDFfonts'
  % per page, then the contents dumped out in 'dump-fonts-used'
  1000 dict

  1 1 PDFPageCount
  {
    dup pdfgetpage dup 3 -1 roll
    dump-media-sizes
    1 index exch getPDFfonts
  } for

  dump-fonts-used

} bind def

% Choose between collection vs plain file.
% Enumerate collections and apply the dump procedure.
/enum-pdfs {		% - -> -
  File (r) file runpdfbegin
  pdf_collection_files
  dup mark eq {
    pop
    File dump
    runpdfend
  } {
    runpdfend
    ] 0 1 2 index length 1 sub {
        2 copy get exch           %  [file ... ] file i
        1 add (0123456789) cvs    %  [file ... ] file (i+1)
        File exch ( part ) exch concatstrings concatstrings
        exch                      %  [file ... ] (fname part i+1) file
        dup type /filetype eq {
          runpdfbegin
          dump
          runpdfend
          closefile
        } {
          1024 string cvs % .namestring is deprecated
%          .namestring
          dup (r) file
          runpdfbegin
          exch dump
          runpdfend
          deletefile
        } ifelse
    } for
    pop
  } ifelse
} bind def

enum-pdfs
end
quit