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% Copyright (C) 2001-2019 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.
%

% PDF font operations.

% Since PDF font are not unique and can collide with external font resources
% or each other, use font dictionaries obtained from PDF directly, never
% register them as resources or look them up by name. Use findfont oparator
% for non-embedded fonts only. CIDFont resources still use the old logic
% described below.

% Finding a font by name can't give a proper result when PDF font names aren't unique.
% But it is only the way to obtain a font in Postscript after a font file is executed.
% Therefore using a FontName (and findfont) is allowed only
% immediately after a font file is executed.
% In all other cases the font to be found by a pointer through PDF structures.
%
% This ideal logics can't work for documents,
% which define a font resource with an embedded font,
% and another font resource with same BaseFont but with no embedded font
% (and possibly with no font descriptor).
% Our testbase does contain such examples.
% In this case we do find font by FontName (with findfont),
% since there is no other way to get a reasonable result.

/.setlanguagelevel where { pop 2 .setlanguagelevel } if
.currentglobal //true .setglobal
/GS_PDF_ProcSet load begin	% from userdict at this point
pdfdict begin

% We cache the PostScript font in an additional element of the
% font resource dictionary, called PSFont.

% ---------------- Encodings ---------------- %

/.notdefEncoding 256 { /.notdef } repeat 256 packedarray def

% Apply a list of differences to an Encoding.
% Note that the differences may cause the array to grow.
/updateencoding {	% <encoding|null> <differences> updateencoding <enc'>
        % Calculate the length of the result.
  % in case the incoming Encoding is null, use .notdefEncoding
  exch dup //null eq { pop .notdefEncoding } if
  0 0 3 index {
    dup type /nametype ne { exch pop oforce } { pop 1 add } ifelse
    % Differences list may not be in order, update the largest_index
    % stack: <Differences> <encoding> <largest_index> <at_index>
    2 copy lt { exch pop dup } if	% at_index is new largest
  } forall
  pop 1 index length .max array dup 0 4 -1 roll putinterval
  exch 0 exch {
                % Stack: enc' code element
    dup type /nametype ne
      { exch pop oforce }
      { 3 copy put pop 1 add }
    ifelse
  } forall pop
} bind executeonly def

/good_encoding_names <<
  /MacRomanEncoding 0 /MacExpertEncoding 0 /WinAnsiEncoding 0
>> readonly def

/known_symbolic_fonts <<
  /Wingdings2 0
  /ZapfDingbats 0
>> readonly def

% Get the Encoding for a font.
/getencoding		% <base-encoding> <font-resource> getencoding <enc>
 { dup /Encoding knownoget
    { dup type /nametype eq
       {
         % The published PDF specification says the Encoding name
         % "must be" one of the 3 predefined Encodings, implying
         % that an error should occur if it isn't.  However, Acrobat
         % Reader simply ignores unknown names, and since there are
         % some buggy applications that rely on this, we do the same.

         //good_encoding_names 1 index known {
           exch /BaseFont knownoget not { 0 } if
           % Ignore named encodings for known symbolic fonts. See bug 690135.
           //known_symbolic_fonts exch known {
             pop
           } {
             exch pop findencoding
           } ifelse
         } {
           pop pop
         } ifelse
       }
       { exch pop
         dup type /arraytype eq
         { exch pop
           (   **** Warning: Encoding is an array, not name or dictionary.\n)  pdfformatwarning
         }
         { dup /BaseEncoding knownoget
             {
               %% Originally we ignored the specific invalid name '/' here from Bug #687786, however
               %% Bug #696942 contains an invalid BaseEncoding '/utf-8', so now we check all BaseEncoding
               %% against the permitted names, just as we do for Encodings.
               //good_encoding_names 1 index known{
                 findencoding 3 -1 roll pop exch
               }{
                 (   **** Error: Invalid BaseEncoding name ") print 256 string cvs print (" ignoring BaseEncoding.\n)  pdfformaterror
                 (               Output may be incorrect.\n) pdfformaterror
               }ifelse
             } if
           /Differences knownoget { updateencoding } if
         }
         ifelse
       }
       ifelse
     } {
       pop
       (   **** Error: Encoding not present.\n)  pdfformaterror
       (                 Output may be incorrect.\n) pdfformaterror
     }
     ifelse
 } bind executeonly def

currentdict /good_encoding_names undef
currentdict /known_symbolic_fonts undef

/checkGlyphNames2Unicode % <dict> checkGlyphNames2Unicode -
{
  PDFDEBUG {
    dup /FontInfo .knownget {
      /GlyphNames2Unicode .knownget {
        (Has GlyphNames2Unicode) =
        pop % { exch //== exec //== exec} forall
      } if
    } if
  } if
  pop
} bind executeonly def

% Define a font using it's FontName as the key.
% Adjust a font according to the Encoding and Widths in the font resource.
/adjustfont {		% <font-resource> <font> adjustfont <font'>
  getfontencoding
  3 copy .processToUnicode
  getfontmetrics 5 -1 roll pop .updatefont {
    %% Bug #696306 has a broken type 1 font where the eexec encrypted portion simply ends
    %% leaving a partial glyph description and, more importantly, the Private dictionary
    %% on the operand stack. Ths means the font dictonary does not contain a Private
    %% dictionary which causes .buildfont1 to throw an error. .completefont calls .buildfont1
    %% (which is obscured by a definition in gs_type1.ps) so we need to check the reault
    %% of .completefont. If it fails we must discard the font dictionary and use a fallback.
    {.completefont} stopped {
      (\n *** ERROR: The font ) print /FontName get 256 string cvs print ( is damaged and cannot be used. Switching to a\n) pdfformaterror
      (            last-ditch fallback, text may not render correctly, or at all.\n\n) pdfformaterror
      /Helvetica findfont
    }if
  } if
} bind executeonly def

% Get the (possibly modified) encoding of a font.
/getfontencoding {	% <font-resource> <font> getfontencoding
                        %   <font-resource> <font> <Encoding|null>
  % Ignore encoding when TrueType is requested
  % and loaded from an embedded stream.
  % All other cases are left unchanged.
  dup /FontType get 42 eq 1 index /PathLoad known not and
  2 index /Subtype get /TrueType eq and {
    //null
  } {
    % Acrobat appears to be always using StandardEcoding as the
    % default encoding for some non-symbolic fonts (rather than,
    % as the spec states, the encoding specified by the font).
    % As this is contrary to spec, and we only have a CFF
    % example, I've restricted this to fonts with Subtype Type1C
    % *and* that result in a Type 2 PS font.
    1 index /FontDescriptor knownoget
    {
      dup
      % Unfortunately, Acrobat doesn't enforce the meaning of
      % FontFile[23] so whilst, in theory, Type1C should only
      % occur in FontFile3, we can't rely on that.
      dup /FontFile knownoget not
      {
        dup /FontFile2 knownoget not
        {
          dup /FontFile3 knownoget not {1 dict} if
        } if
      } if
      exch pop /Subtype knownoget {/Type1C eq}{//false} ifelse
      exch /Flags knownoget {4 and 4 eq not}{//false}ifelse and
    } {//false} ifelse

    1 index /FontType get 2 eq and
    {
        2 index /Encoding knownoget {pop StandardEncoding 2 index getencoding} { //null } ifelse
    }
    {
      2 index /Encoding known {
        dup /Encoding knownoget { 2 index getencoding } { //null } ifelse
      } {
        //null
      } ifelse
    } ifelse
  } ifelse
} bind executeonly def

% Returns true if the current glyph is in the Differences array at
% the specified index value. This is needed because the Widths
% array may map to the same glyph at different positions from the
% Encoding. We want to use the Width that was associated with the
% one specified in the Encoding::Differences list.
/match_in_diff     % <Differences> <index> <glyphname> match_in_diff <bool>
{ //false 4 1 roll 0 4 -1 roll	% stack: false index glyphname at_index==0 Differences
  { exch 1 index type /nametype ne {
      % stack: false index glyphname Diff_element at_index
      pop	% Diff_element is new at_index
    } {
      % stack: false index glyphname Diff_element at_index
      exch 2 index eq {
        % stack: false index glyphname at_index
        dup 3 index eq {
          //true 5 1 roll % stack: true false index glyphname at_index
          pop exit
        } if
      } if
      1 add		% at_index++ stack: false index glyphname at_index'
    } ifelse
  } forall
  % stack: true  false index     glyphname
  %  or  : false index glyphname at_index
  pop pop pop
} bind executeonly def

/unique_name {  % <dict> </root> unique_name </unique>
  %
  %  Note : this function interacts with pdf_write_encoding in src/gdevpdtw.c
  %  and with copied_drop_extension_glyphs in src\gxfcopy.c
  %  by adding a reserved substring (~GS~).
  %
  .namestring       % <<>> (root)
  0 1 65535 {
    5 string cvs    % <<>> (root) (0)
    (~GS~) exch concatstrings
    1 index exch    % <<>> (root) (root) (~GS~0)
    concatstrings   % <<>> (root) (root~GS~0)
    dup             % <<>> (root) (root~GS~0) (root~GS~0)
    3 index exch    % <<>> (root) (root~GS~0) <<>> (root~GS~0)
    known not {
      exch pop exit % <<>> (root~GS~0)
    } if
    pop
  } for
  exch pop cvn      % /root0
} bind executeonly def

% Get the metrics of a font, if specified.
/getfontmetrics {       % <font-resource> <font> <Encoding|null> getfontmetrics
                        %   <font-resource> <font> <Encoding|null>
                        %   <Metrics|null> <GlyphMap|null>
  2 index /Widths oknown {
    dup //null eq { pop dup /Encoding get } if
    7 dict begin
      dup length dict
      /Metrics exch def
      /Encoding exch def
      /GlyphMap //null def
      exch
      dup /Widths oget /Widths exch def
                % Stack: font font-res
                % Note that widths are always based on a 1000-unit
                % character space, but the FontMatrix may specify
                % some other scale factor.  Compensate for this here,
                % by scaling the Widths if necessary.
      0.001 2 index /FontMatrix get 0 get
      dup 0 eq {
                % FontMatrix.xx == 0, so we cannot scale down by xx.
                % - FontMatrix[0] == 0 implies either FontMatrix[1] <> 0 or
                %   FontMatrix cannot be inverted. In the 1st case we have
                %   FontMatrixNonHV == true and will render text with cshow + xshow.
                %   In the 2nd case, metrics in the PDF Font object cannot be enforced
                %   [by altering metrics in PS glyph space].
                % HACK:
                % - we scale down by FontMatrix[1];
                % - given the format of Metrics entries we use, wy = 0 in glyph space;
                % - as a result, the cshow procedure receives as wy the value we
                %   need for wx (all of this in PS user space).
        pop
        2 index /FontMatrix get 1 get
        dup 0 eq { pop 1 } if % sorry, no way to enforce PDF metrics by altering the font
      } if
      div
                % Stack: font font-res mscale
      /FirstChar 2 index /FirstChar knownoget not {
        (   **** Warning: /FirstChar attribute is missing, assuming 0.\n) pdfformatwarning
        0
      } if def
      /LastChar  2 index /LastChar  knownoget not {
        (   **** Warning: /LastChar attribute is missing, assuming 255.\n) pdfformatwarning
        255
      } if def

      Encoding length LastChar le {
         (   **** Warning: Font Encoding array size is smaller than character range.\n)
         pdfformatwarning
      } if

      1 index /FontDescriptor knownoget {
           /MissingWidth knownoget not { 0 } if
        }
        { 1000
        }
      ifelse /MissingWidth exch def

      Widths length LastChar FirstChar sub le {
         (   **** Warning: Font Widths array size is smaller than character range.\n)
         pdfformatwarning
         /Widths [Widths aload length LastChar FirstChar sub exch sub MissingWidth exch {dup} repeat] def
      } if
      FirstChar

      0 Encoding
       {        % Stack: font font-res mscale first-char index charname

         1 index FirstChar lt { MissingWidth } {
           1 index LastChar gt { MissingWidth } { Widths 2 index FirstChar sub get } ifelse
         } ifelse
         oforce

                % Stack: font font-res mscale first-char index charname width
         4 index mul
                % The following 'loop' is only context for 'exit'.
         {
                % Work around a bug in pdfTeX, which can generate Encoding
                % vectors containing nulls :
           1 index //null eq { exit } if
           Metrics 2 index .knownget {
             1 index ne
           } {
             //false
           } ifelse {
             % Two or more Encoding elements refer same glyph name,
             % and Widths specify different wihts for it.
             % Since a Postscript font can't have different
             % Metrics for same glyph name,
             % we generate an unique name, and create a new
             % Charstrings entry with same glyph value.
             GlyphMap //null eq {
               /Encoding Encoding dup length array copy def
               /GlyphMap 4 dict def
             } if
             % To prevent too many new names, check whether
             % we can use one already created for same glyph.
             //true
             GlyphMap {                           % f r s c i n w b n1 n2
               4 index eq {                       % f r s c i n w b n1
                 dup Metrics exch get             % f r s c i n w b n1 w1
                 3 index eq {                     % f r s c i n w b n1
                   4 3 roll pop                   % f r s c i w b n1
                   3 1 roll pop                   % f r s c i n1 w
                   Encoding 3 index 3 index put
                   //false                        % f r s c i n1 w b
                   exit
                 } {
                   pop
                 } ifelse
               } {                                % f r s c i n w b n1
                 pop
               } ifelse
             } forall                             % f r s c i n w b
             { % Do create a new name.
               Metrics 2 index //unique_name exec % f r s c i n w nn
               Encoding 4 index 2 index put
               GlyphMap 1 index 5 -1 roll put     % f r s c i w nn
               exch
                  % Stack: font font-res mscale first-char index new_name width
             } if
           } if
           2 copy Metrics 3 1 roll put
           exit
         } loop
         pop pop
         1 add
       }
     forall pop pop pop
     exch Encoding Metrics GlyphMap end
  } {
    //null //null
  } ifelse
} bind executeonly def

currentdict /unique_name undef
currentdict /match_in_diff undef

/ToUnicodeCMapReader 4 dict begin
  /defineresource % <name> <dict> <cat-name> defineresource <dict>
  {
    pop
    dup userdict exch /.lastToUnicode exch put
    exch pop
  } bind executeonly def

  /CIDSystemInfo
  {
    (   **** Warning: ToUnicode CMap has invalid syntax near CIDSystemInfo.\n)  pdfformatwarning
    /CIDSystemInfo
  } bind executeonly def % A work around a bug in Altona.Page_3.2002-09-27.pdf - a slash is missed.

  /CMapName
  {
    (   **** Warning: ToUnicode CMap has no CMapName.\n\
        See the comment to revision 6201 in gs/doc/ps2pdf.htm#Problems .\n) pdfformatwarning
    /CMap1   % arbitrary, PDF defineresource tolerates non-unique names
  } bind executeonly def % A work around incorrect ToUnicode CMap generated by GS before rev. 6201.

  % Split large ranges into smaller chunks to stay withing the limits
  % of various PS% objects and speed up operand stack manipulation,
  %  esp. "counttomatk -3 roll". Bug 691908.
  /beginbfrange {
    { pop
      mark
       256 {
        currentfile token not { /endbfrange exit } if
        dup /endbfrange eq { exit } if
        currentfile token not { pop /endbfrange } if
        currentfile token not { pop pop /endbfrange } if
        dup ([) eq {
          pop [
          { currentfile token not { exit } if
            dup (]) eq { pop exit } if
          } loop ]
        } if
      } repeat
      dup /endbfrange eq {
        pop endbfrange exit
      } {
        endbfrange
        mark
      } ifelse
    } loop
  } bind executeonly def
currentdict end readonly def

/string2number     % <string> string2number <number>
{ 0 exch dup 0 exch 1 exch length 1 sub {     % n () i
    1 index exch get                          % n () v
    3 2 roll 256 mul add exch                 % v+n*256 ()
  } for
  pop                                         % N
} bind executeonly def

/copy&def    % <key> <value> <bool> copy&def -
{
  { //true
  } {
    currentdict gcheck {
      dup gcheck not
    } {
      //false
    } ifelse
  } ifelse
  { currentglobal currentdict gcheck setglobal
    exch dup length string copy exch
    setglobal
  } if
  def
} bind executeonly def

/.convert_ToUnicode-into-g2u % <GlyphNames2Unicode> <Encoding|null> <CMap> .convert_ToUnicode-into-g2u -
{
  CMAPDEBUG {
    (.convert_ToUnicode-into-g2u beg) =
  } if
  3 2 roll begin
  /.CodeMapData get % About the data format see gs_cmap.ps, the comment after "CMap operators".
  1 get % code maps
  {
    CMAPDEBUG {
      dup //== exec
    } if
    dup length 1 sub 0 exch 5 exch {           % e [] i
      2 copy get                               % e [] i (prefix)
      string2number                            % e [] i prefix
      2 index 2 index 1 add get                % e [] i prefix (key_size,?is_range,value_type,value_size)
      dup 0 get 8 mul                          % e [] i prefix (key_size,?is_range,value_type,value_size) key_size*8
      3 2 roll exch bitshift exch              % e [] i prefix<<key_size*8 (key_size,?is_range,value_type,value_size)
      dup 0 get exch 3 get                     % e [] i offset key_size value_size
      4 index 4 index 2 add get                % e [] i offset key_size value_size (keys)
      5 index 5 index 3 add get                % e [] i offset key_size value_size (keys) (values)
      CMAPDEBUG {
        ( offset=) print 4 index =string cvs print
        ( key_size=) print 3 index =string cvs print
        ( value_size=) print 2 index =
        ( keys=)   print 1 index //== exec
        ( values=) print dup //== exec
      } if
      1 index length 0 eq {
        % A single pair.
        exch pop exch pop exch pop exch        % e [] i (values) offset
        4 index //null ne {
          4 index length 1 index gt {
            4 index exch get
          } if
        } if                                   % e [] i (values) cid|name
        exch
        CMAPDEBUG {
          ( defined single: ) print 1 index =string cvs print ( ) print dup //== exec
        } if
        //false copy&def                       % e [] i
        pop                                    % e []
      } {
        % A range.                             % e [] i offset key_size value_size (keys) (values)
        dup length string copy % protect the original string from modifications below.
        0 4 index 2 mul 3 index length 1 sub { % e [] i offset key_size value_size (keys) (values) j
          2 index 1 index 6 index getinterval
          string2number                        % e [] i offset key_size value_size (keys) (values) j keyL
          CMAPDEBUG {
              ( keyL=) print dup =string cvs print
          } if
          3 index 2 index 7 index add 7 index getinterval
          string2number                        % e [] i offset key_size value_size (keys) (values) j keyL keyH
          CMAPDEBUG {
              ( keyH=) print dup =
          } if
          3 2 roll 6 index idiv 5 index mul    % e [] i offset key_size value_size (keys) (values) keyL keyH J
          3 index exch 6 index getinterval     % e [] i offset key_size value_size (keys) (values) keyL keyH (valueL)
          3 1 roll 1 exch {                    % e [] i offset key_size value_size (keys) (values) (value) k
            9 index //null ne {
              9 index exch get                 % e [] i offset key_size value_size (keys) (values) (value) name
            } if                               % e [] i offset key_size value_size (keys) (values) (value) cid|name
            1 index                            % e [] i offset key_size value_size (keys) (values) (value) cid|name (value)
            CMAPDEBUG {
              ( defined from range: ) print 1 index =string cvs print ( ) print dup //== exec
            } if
            //true copy&def                    % e [] i offset key_size value_size (keys) (values) (value)

            %% Calculate the value from the last string
            dup dup length 1 sub 0 exch 0 1 3 -1 roll
            {
              % (string) value index
              exch 256 mul exch
              2 index exch get add
            } for

            %% and increment the value for the next string
            1 add

            %% Now convert the value into a string of bytes.
            1 index length 1 sub 1 exch 0 1 3 -1 roll
            {
              % (string) value divisor index
              2 index 2 index idiv 255 and % (string) value divisor index byte
              exch 4 index length 1 sub exch sub % (string) value divisor byte string_position
              5 index                      % (string) value divisor byte string_position (string)
              exch 3 -1 roll put           % (string) value divisor
              256 mul
            } for
            pop pop pop
          } for                                % e [] i offset key_size value_size (keys) (values) (value)
        } for
        pop pop pop pop pop pop pop            % e []
      } ifelse
    } for
    pop                                        % e
  } forall
  end
  pop                                          %
  CMAPDEBUG {
    (.convert_ToUnicode-into-g2u end) =
  } if
} bind executeonly def

/.DoToUnicode?
{
  /IgnoreToUnicode where
  {/IgnoreToUnicode get not}
  {//true} ifelse
} bind executeonly def

/.processToUnicode   % <font-resource> <font-dict> <encoding|null> .processToUnicode -
{
  //.DoToUnicode? exec
  {
    currentdict count 1 sub /.stackdepth exch .forceput
    currentdict countdictstack /.dstackdepth exch .forceput
    {
      1 index /FontType get 0 eq
      {
        1 index /FDepVector get 0 get
        dup /FontType .knownget not
        {
          dup /CIDFontType .knownget
          { dup 2 eq {pop 11} if }
          {-1} % just some value that's not a valid font type
          ifelse
        }if
        11 eq
        { /Path known}
       {pop //false}
        ifelse
      }
      {//false} ifelse
      % Currently pdfwrite is only device which can handle GlyphNames2Unicoide to
      % generate a ToUnicode CMaps. So don't bother with other devices.
      /WantsToUnicode /GetDeviceParam .special_op {
        exch pop
      }{
        //false
      }ifelse
      or
      {
        PDFDEBUG {
          (.processToUnicode beg) =
        } if
        2 index /ToUnicode knownoget {
          dup type /dicttype eq { dup /File known not } { //true } ifelse {
            % We undefine wrong /Length and define /File in stream dictionaries.
            % Bug687351.pdf defines /ToUnicode /Identity-H, what is incorrect.
            (   **** Warning: Ignoring bad ToUnicode CMap.\n)  pdfformatwarning
            pop
          } {
            /PDFScanRules .getuserparam dup //null eq {
              pop //PDFScanRules_null
            } {
              1 dict dup /PDFScanRules 4 -1 roll put
            } ifelse
            //PDFScanRules_true setuserparams
            PDFfile fileposition
            3 -1 roll
            count 1 sub
            countdictstack
            { //false resolvestream
              % Following Acrobat we ignore everything outside
              %   begincodespacerange .. endcmap.
              dup 0 (begincodespacerange) /SubFileDecode filter flushfile
              /CIDInit /ProcSet findresource begin
              //ToUnicodeCMapReader begin
              12 dict begin
              /CMapType 2 def
              mark exch % emulate 'begincodespacerange'
              0 (endcmap) /SubFileDecode filter cvx /begincmap cvx exch 2 .execn
              endcmap
              userdict /.lastToUnicode currentdict put
              end end end
            }

            PDFSTOPONERROR {
              { exec } 0 get
              //false
              5 -2 roll
              5
            } {
              { stopped } 0 get
              4 2 roll
              4
            } ifelse
            array astore cvx exec

            countdictstack exch sub 0 .max { end } repeat
            count exch sub 2 sub 0 .max { exch pop } repeat
            3 1 roll                     % Stach the stop flag.
            PDFfile exch setfileposition
            setuserparams
            {
              (   **** Warning: Failed to read ToUnicode CMap.\n)  pdfformatwarning
            } {
              1 index /FontInfo .knownget not {
                currentglobal 2 index dup gcheck setglobal
                /FontInfo 5 dict dup 5 1 roll .forceput
                setglobal
              } executeonly if
              dup /GlyphNames2Unicode .knownget not {
                //true                        % No existing G2U, make one
              } {
                dup wcheck {
                  //false                     % Existing, writeable G2U, don't make new one
                } {
                  pop //true                          % Existing read only G2U, make new one
                } ifelse
              } ifelse
              {
                currentglobal exch dup gcheck setglobal
                dup /GlyphNames2Unicode 100 dict dup 4 1 roll .forceput
                3 2 roll setglobal
              } if                                 % font-res font-dict encoding|null font-info g2u
              exch pop exch                        % font-res font-dict g2u encoding|null
              userdict /.lastToUnicode get         % font-res font-dict g2u Encoding|null CMap
              .convert_ToUnicode-into-g2u          % font-res font-dict
              //null                               % font-res font-dict //null
            } ifelse
          } ifelse
        } if
        PDFDEBUG {
          (.processToUnicode end) =
        } executeonly if
      } executeonly if
    } executeonly stopped
    {
      .dstackdepth 1 countdictstack 1 sub
      {pop end} for
      .stackdepth 1 count 3 sub
      {pop pop} for
    } if
    pop pop pop
    currentdict /.stackdepth .forceundef
    currentdict /.dstackdepth .forceundef
  } executeonly
  {pop pop pop}
  ifelse

} bind executeonly odef

currentdict /.DoToUnicode? .forceundef

% ---------------- Descriptors ---------------- %

% Partial descriptors for the 14 built-in fonts.  Note that
% from PDF 1.1 to PDF 1.2, the meaning of the Flag 6 in the FontDescriptor
% object has undergone a subtle change in its meaning which has serious
% consequences for searching with Acrobat:
% In PDF 1.1, the flag meant: Font has StandardEncoding
% In PDF 1.2, the flag means: Font has (subset of) StandardRomanCharacterSet
/standardfontdescriptors mark
  /Courier mark /Flags 16#23 .dicttomark
  /Courier-Oblique 1 index
  /Courier-Bold 1 index
  /Courier-BoldOblique 1 index
  /Helvetica mark /Flags 16#20 .dicttomark
  /Helvetica-Oblique 1 index
  /Helvetica-Bold 1 index
  /Helvetica-BoldOblique 1 index
  /Times-Roman mark /Flags 16#22 .dicttomark
  /Times-Bold 1 index
  /Times-Italic mark /Flags 16#62 .dicttomark
  /Times-BoldItalic 1 index
  /Symbol mark /Flags 16#4 .dicttomark
  /ZapfDingbats 1 index
.dicttomark readonly def

% ---------------- Utilities ---------------- %

/.pdforigfontcache_g 20 dict def
currentglobal //false setglobal
systemdict /.pdforigfontcache_l 20 dict .forceput
setglobal

% Find an original font, using cache to prevent adjustfont to accumulate changes.
/pdffindcachedfont {   % <font_name> pdffindcachedfont <font>
  dup //.pdforigfontcache_g exch .knownget {
    exch pop
  } {
    dup .pdforigfontcache_l exch .knownget {
      exch pop
    } {
      dup findfont dup
      dup gcheck { //.pdforigfontcache_g } { .pdforigfontcache_l } ifelse
                     % Stack : font_name font font cache
      4 2 roll .growput
    } ifelse
  } ifelse
} bind executeonly def

% Add original font to cache to prevent adjustfont to accumulate changes.
/pdfaddcachedfont {   % <font_name> pdfaddcachedfont <font>
  dup findfont dup                   % name font font
  dup gcheck { //.pdforigfontcache_g } {.pdforigfontcache_l} ifelse
  4 2 roll                           % font d name font
  put                                % font
} bind executeonly def

/.remove_font_name_prefix {  % <name>  .remove_font_name_prefix <name>
  dup .namestring (+) search {
    //true exch
    { dup 65 lt exch 90 gt or {
        pop //false exit
      } if
    } forall
    { pop exch pop cvn
    } {
      pop pop
    } ifelse
  } {
    pop
  } ifelse
} bind executeonly def

% Find a font (except for embedded ones), and adjust its encoding if necessary.
/.pdfdfndict mark
  /defaultfontname /Helvetica
.dicttomark readonly def
/pdffindfont {		% <font-resource> <fontname> pdffindfont <font>
                % If the font isn't available, synthesize one based on
                % its descriptor.
  dup /Font resourcestatus {
    pop pop pdffindcachedfont
  } {
    1 index /FontDescriptor knownoget {
                % Stack: font-res fontname fontdesc
      dup /Flags oget
      dup 16#40 and -6 bitshift		% 1, oblique/italic
      1 index 16#40000 and -17 bitshift add	% 2, bold
      exch 16#2 and 2 bitshift add	% 8, serif
                % We should look at the fixed flag, too.
                % Stack: font-res fontname fontdesc properties

                % Even though /FontName is a required key in FontDescriptor dict
                % (As of the PDF 1.4 Reference Manual), In the case of missing
                % /FontName key, we substitue /BaseFont for the value of /FontName.
                % Yet another case of broken PDF's that Adobe Reader accepts.
      1 index dup /FontName known {
        /FontName oget
        dup type /nametype ne {
          (   **** Error: /FontName in FontDescriptor is not a name.\n)
          pdfformaterror
          (               Output may be incorrect.\n) pdfformaterror
          cvn
        } if
      } {
        (   **** Error: FontDescriptor missing required /FontName key. BaseFont name used.\n)
        pdfformaterror
        (               Output may be incorrect.\n) pdfformaterror
        pop 2 index		% grab the BaseFont from the stack.
      } ifelse
      .remove_font_name_prefix
      exch
                % Analyzes font name and extract "Bold" and "Narrow" properties
                % which are not described by the FontDescriptor Flags.
                % We also allow the font name analysis to override the Flags setting
                % for Italic/Oblique as this gives us results more consistent with
                % Acrobat.
      0 2 index //.fontnameproperties exec 7 and or
                % Rebind the default font name to Helvetica so that
                % fonts with no properties are handled correctly.
      //.pdfdfndict begin .substitutefontname end
                % Stack: font-res fontname fontdesc substname|null
      Fontmap 1 index known
      {//false}
      { .buildnativefontmap pop NativeFontmap 1 index known not} ifelse

      {
                % No available good substitution, use the standard one.
        pop 1 index .substitutefont
      } if
      dup 3 index ne QUIET not and {
        (Substituting font ) print dup =only
        ( for ) print 2 index =only (.) = flush
      } if
      pdffindcachedfont
                % Stack: font-res fontname fontdesc font

      % Some non-compliant files are missing FirstChar/LastChar,
      % despite referencing a non-base14 font
      3 index /FirstChar knownoget
      {
        0                                       % push an initial value for accumating the Widths
        0 string                                % and an empty string to interrogate the font
        7 index /Widths knownoget
        {
          0 1 2 index length 1 sub
          {
            dup 2 index exch get
            dup type /packedarraytype eq {exec} if % Handle entries which are indirect references (seriously ? !!)
            dup 0 gt                              % We ignore entries of zero in the widths array
            {
              exch 5 index add                    % add FirstChar to the idx to get a char code
              dup 64 gt 1 index 91 lt and         % we only want to consider A~Z and....
              1 index 96 gt 2 index 123 lt and or % ... a~z
              {
                exch
                5 -1 roll add 4 1 roll            % add the width to the accumulator on the stack
                1 string dup 0 4 -1 roll put
                3 -1 roll concatstrings exch      % add the char code to the string
              }
              {
                pop pop
              } ifelse
            }
            {
               pop pop
            } ifelse
          } for
          pop           % get rid of the Widths array
          3 -1 roll pop % get rid of the FirstChar value
          dup length dup 0 gt
          {
            3 -1 roll exch div % calculate an average width from the Widths array

            gsave
            2 index 10 scalefont setfont
            exch dup length exch stringwidth
            grestore
            pop 100 mul exch div div
            % Only make the font smaller/narrower, not larger/wider
            dup 1.0 lt
            {
              0 0 2 index 0 0 6 array astore
              exch //true .copyfontdict
              dup /FontMatrix get 3 -1 roll matrix concatmatrix
              exch dup 3 -1 roll /FontMatrix exch put
              % we don't need to definfont here, we can leave that to .completefont below
            }
            {
              pop
            } ifelse
          }
          {
            % no suitable Widths entries - carry on and hope for the best......
            pop pop pop
          } ifelse
        }
        {
          % Broken file: no Widths array for non-base14 font - carry on and hope for the best......
          (   **** Warning: Widths array missing in FontDescriptor for non-base14 font\n)
          pdfformatwarning
          pop pop pop
        } ifelse
      }
      {
        (   **** Warning: FirstChar value missing in FontDescriptor for non-base14 font\n)
        pdfformatwarning
      } ifelse
                % Stack: font-res fontname fontdesc font
                % If this is a small-caps font, replace the CharString
                % entries for a..z.

      exch /Flags oget 16#20000 and 0 ne {
        //true .copyfontdict
        dup /CharStrings 2 copy get dup length dict .copydict
        % stack: font-res fontname font font /CharStrings CharStringsdict
        5 index /FirstChar get 97 .max
        6 index /LastChar get 122 .min 1 exch {
                % Stack: font-res fontname font' font' /CharStrings charstrings code
                % Note that this only remaps a-z, not accented characters.
          6 index /Widths oget 1 index 8 index /FirstChar get sub oget
          1 string dup 0 5 -1 roll put
                % Stack: font-res font' font' /CharStrings charstrings code
                %   width (x)
          2 index exch dup cvn exch
          dup 0 2 copy get 32 sub put 4 -1 roll {
                        % Stack: operand (X) width
            0 setcharwidth exch pop
            currentfont /FontMatrix get matrix invertmatrix concat
            0.7 dup scale 0 0 moveto show
          } /exec cvx 4 packedarray cvx put
        } for put
      } if
      dup /FontName get 2 index ne {
        //true .copyfontdict
        2 copy exch /FontName exch put
      } if
      exch pop .completefont
    } {
                % No descriptor available, use the default algorithm.
      pdffindcachedfont
    } ifelse
  } ifelse
  exch pop
} bind executeonly def

% ---------------- Type 1 fonts ---------------- %

/buildType1		% <Type1-font-resource> buildType1 <font>
 { dup /BaseFont get pdffindfont
 } bind executeonly def

% Read an embedded Type 1 font.
/readfontfilter {	% <proc> readfontfilter <filter>
  0 () /SubFileDecode filter
} bind executeonly def

% Adobe Acrobat doesn't skip space characters after eexec
/eexec_pdf_param_dict mark
  .eexec_param_dict {} forall
  /keep_spaces //true
.dicttomark readonly def

% When Type 1 font reading procedure is executing, a copy of this dictionary is current.
% topFontDict allows us to *attempt* to handle the case where a Type 1 font definition
% does not start by creating it's own dictionary (i.e. a number of the keys end up in
% the currentdict rather than the font dictionary).
% The whole type1 stream can be executed directly. There's no need to process
% Length1, 2, 3 keys.

/readtype1dict 10 dict dup begin
  /prev_definefont /definefont load def

  /definefont {
    % if a font defines any keys outside it's own dictionary,
    % this attempts to cope by copying them into the font dictionary
    [
      /FontType    % in PLRM order
      /FontMatrix
      /FontName
      /FontInfo
      /WMode
      /Encoding
      /FontBBox
      /UniqueID
      /XUID
      /PaintType
      /StrokeWidth
      /Metrics
      /Metrics2
      /CDevProc
      /CharStrings
      /Private
      /WeightVector
    ]
    {
      2 copy known
      {pop}
      {
        dup where
        {
          1 index get
          2 index
          3 1 roll put
          dup /MisplacedKey 0 put
        }
        {pop} ifelse
      } ifelse
    } forall
    dup /MisplacedKey known {
      (   **** Warning: Type 1 font defines some required keys outside the font dictionary.\n)
      pdfformatwarning
    } if

    dup /CharStrings get /.notdef known not {
      dup /CharStrings get
        /.notdef <9E35CED7FFD3622F09> put
        (   **** Warning: Type 1 font has no /.notdef entry in /CharString dictionary.\n)
        pdfformatwarning
    } if
    dup /UniqueID .knownget {
      dup dup 0 lt exch 16#ffffff gt or {
        (   **** Warning: Ignoring invalid /UniqueID = ) exch =string cvs
        concatstrings (\n) concatstrings pdfformatwarning
        dup /UniqueID undef
      } {
        pop
      } ifelse
    } if
    prev_definefont
  } bind executeonly def

  /undef_proc_warning {
    /Repaired //true store     % flag that we have warnings
    UndefProcList exch 2 copy .knownget { 1 add } { 1 } ifelse put
  } bind executeonly def

  /missing-type1-procs 6 dict begin
    /-| { string currentfile exch readstring pop /-| //undef_proc_warning exec } executeonly bdef
    /RD { string currentfile exch readstring pop /RD //undef_proc_warning exec } executeonly bdef
    /|- { noaccess def /|- //undef_proc_warning exec } executeonly bdef
    /ND { noaccess def /ND //undef_proc_warning exec } executeonly bdef
    /|  { noaccess put /|  //undef_proc_warning exec } executeonly bdef
    /NP { noaccess put /NP //undef_proc_warning exec } executeonly bdef
  currentdict end readonly def

  /eexec {
        % Assume the font dictionary is directly below the file on the stack
    count 0 gt { /topFontDict 2 index cvlit store } if
    //eexec_pdf_param_dict /eexecDecode filter

    //missing-type1-procs begin
    /userdict .systemvar begin
    //systemdict begin
    readtype1dictcopy begin cvx stopped

    currentfile flushfile % Skip the trailer after return from eexec, bug 690701.
    { currentdict end //missing-type1-procs eq { exit } if } loop
    { stop } if
  } bind executeonly def

  /readonly-op-dict <<
    /stringtype 0
    /arraytype 0
    /packedarraytype 0
    /dicttype 0
  >> readonly def

  /readonly { % bug 689617
    dup type //readonly-op-dict exch known not {
      (   **** Warning: Type 1 font applies operator readonly to an invalid object type.\n)
      pdfformatwarning
    } if
  } bind executeonly def

  /prev_get /get load def

  /get {
    dup /FontName eq {
      % No warning, probably FontName is defined elsewhere; see definefont above.
      .knownget not { /Missing } if
    } {
      dup /UniqueID eq {
        % We don't want fonts to check /UniqueID and do 'restore'.
        pop pop 16#FEDCBA98  % Arbitrary and invalid value
      } {
        prev_get
      } ifelse
    } ifelse
  } bind executeonly def

  /prev_begin /begin load def

  /begin {
    dup //systemdict eq { pop 0 dict } if
    prev_begin
  } bind executeonly def

  { /undef_proc_warning /missing-type1-procs /readonly-op-dict }
  { currentdict exch undef } forall

end readonly def

currentdict /eexec_pdf_param_dict .undef

/readtype1 {		% <font-resource> <stream-dict> readtype1 <font|null>
   PDFfile fileposition 3 1 roll      % pos res stream
   dup /PFB known exch                % pos res pfb? stream
   //true resolvestream               % pos res pfb? file
   exch {
     //false /PFBDecode filter        % pos res file'
   } if
                % Some buggy embedded fonts leave extra junk on the stack,
                % so we have to make a closure that records the stack depth
                % in a fail-safe way. This code also removes the mark when
                % the implied cleartomark is not executed, i.e. Length3 == 0.
                % Also restore dictstack depth.
                %
   //systemdict begin
   //readtype1dict dup length 5 add dict copy begin % pos res file'
   /file-position 4 -1 roll def       % res file'
   /stack-count count 3 sub def
   1 index /BaseFont oget /savedFontName exch def
   /topFontDict //null def
   /readtype1dictcopy currentdict def
   cvx stopped
   { currentdict /topFontDict known not { end } { exit } ifelse } loop
   { /topFontDict //null def } if
   PDFfile file-position setfileposition
   count stack-count sub { pop } repeat
   topFontDict end end
 } bind executeonly def

% ---------------- Type 3 fonts ---------------- %

/buildType3 {		% <Type3-font-resource> buildType3 <font>
  8 dict begin
    /FontType 3 def
                % If the font does not contain a Resources entry, then we use
                % the resources from our current context.  Page 391 of the PDF
                % 1.6 spec says that the Resources dict is optional and if not
                % present then we should use the Resources for the page.
                % However we have a test file (687989) which uses a Type3 font
                % inside a form XObject and the desired Resources are in the
                % XObject dict and not in the Page dict.  So we are going to
                % the parent object to find resources instead of only going to
                % the page dict when a font does not specify its required
                % resources.
    /Resources 1 index /Resources knownoget {
       oforce
    } {
       LocalResources
    } ifelse def
    /FontBBox 1 index /FontBBox get cvx def
    /FontMatrix 1 index /FontMatrix oget def
    /CharProcs 1 index /CharProcs oget def
    1 index /Widths knownoget {
      /Widths exch def
      1 index /FirstChar known 2 index /LastChar known and {
        /FirstChar 1 index /FirstChar oget def
        /LastChar 1 index /LastChar oget def
      } {
       (   **** Error: Requireed entry FirstChar or LastChar is missing from Font.\n)
       pdfformaterror
       (               Output may be incorrect.\n) pdfformaterror
        /FirstChar 0 def
        /LastChar Widths length def
      }ifelse
    } if
    /FontName 1 index /Name knownoget not { /PDFType3Untitled } if def
    /Encoding .notdefEncoding 2 index getencoding def
                % We have to define BuildChar rather than BuildGlyph:
                % there is no PDF equivalent of glyphshow, and we need
                % the character code to access the Widths.
    /BuildChar {
                % Stack: font charcode
      1 index begin 4 dict begin
      /Font 3 -1 roll def /CharCode 1 index def
      Encoding exch get CharProcs exch knownoget {
        dup /Length get 0 eq {
          pop
          %% Detect a 0 length stream. If this occurs
          %% then we won't execute d0 or d1, and so won't adjust the
          %% character width. So, pretend we got a
          %% null d1, just so that we can adjust using the /Widths
          %% (Bug 697805)
          0 0 0 0 0 0
          pdfopdict /d1 get exec
        }{
          { //false resolvestream
                % Stack: filepos stream
                % Don't let setgcolor set the color inside the BuildGlyph
                % procedure, because this causes an /undefined error.
            q
            %% This is (currently) needed to make sure that the current dictionary, which is
            %% 'nodict' because we did a gsave, is writeable. If we don't execute gput
            %% to make a writeable copy then it is a no access dicitonary and the 'def'
            %% below will fail. It would be nice to fix the cases of this someday, but
            %% we use 'nodict'[ to store other PDF state stuff that isn't gstate, and we
            %% probably always will, so it may well be more trouble than its worth.
            /Dummy //false gput
            Font /Resources get exch pdfopdict
            /BuildCharDictDepth countdictstack def
            .pdfruncontext
            countdictstack BuildCharDictDepth sub
            {
              //pdfdict /.Qqwarning_issued .knownget {not}{//true} ifelse
              {
                (\n   **** Warning: Type 3 glyph has unbalanced q/Q operators \(too many q's\)\n               Output may be incorrect.\n)
                pdfformatwarning
                //pdfdict /.Qqwarning_issued //true .forceput
              } executeonly if
              Q
            } executeonly repeat
            Q
          } executeonly PDFfile fileposition 2 .execn % Keep pdfcount valid.
          PDFfile exch setfileposition
        } executeonly ifelse
      } executeonly
      {
        % PDF Type 3 fonts don't use .notdef
        % d1 implementation adjusts the width as needed
        0 0 0 0 0 0
        pdfopdict /d1 get exec
      } ifelse
      end end
    } executeonly bdef
    dup currentdict Encoding .processToUnicode
    currentdict end .completefont exch pop
} bind executeonly odef
/.adjustcharwidth {	% <wx> <wy> .adjustcharwidth <wx'> <wy'>
  % Enforce the metrics, in glyph space, to the values found in the PDF Font object
  % - force wy == 0 (assumed, and not stored in the PDF font)
  %   Even though PDF1.3-1.7 specifications state that this must be 0,
  %   Distiller sometimes creates Type3 fonts with non-zero wy. We set
  %   it to 0 since this is apparently what Acrobat Reader 4 and 5 do.
  %   PDF1.2 does not mention this restriction, it only says
  %   "see setcharwidth/ setcachedevice in the PostScript Reference".
  % - get wx from the Widths array (do nothing if not present)
  pop 0
  /Widths where {
    begin
    CharCode FirstChar ge CharCode LastChar le and {
      exch pop Widths CharCode FirstChar sub get exch
    } if end
  } if
} bind executeonly def

% ---------------- TrueType fonts ---------------- %

/TTfonts mark
  /Arial /Helvetica
  /Arial,Italic /Helvetica-Oblique
  /Arial,Bold /Helvetica-Bold
  /Arial,BoldItalic /Helvetica-BoldOblique
  /CourierNew /Courier
  /CourierNew,Bold /Courier-Bold
  /TimesNewRoman /Times-Roman
  /TimesNewRoman,Italic /Times-Italic
  /TimesNewRoman,Bold /Times-Bold
  /TimesNewRoman,BoldItalic /Times-BoldItalic
.dicttomark readonly def

/buildTrueType {	% <TrueType-font-resource> buildTrueType <font>
  dup /BaseFont oget
  dup /font_name gput

  1 index /FontDescriptor knownoget
  {
    /Flags knownoget
    {
      4 and 0 ne
      { //true } %  symbolic
      { 1 index /Encoding oknown not}  % no encoding => symbolic
      ifelse
    }
    {//false}
    ifelse
  }
  {//false}
  ifelse

  /is_symbolic gput
  1 index /Encoding oknown {
    StandardEncoding
    3 index getencoding
  } {
    //null
  } ifelse
  /prebuilt_encoding gput
  //false /.render_notdef gput % set the default

  dup /Font resourcestatus dup { exch pop exch pop } if not
  TTfonts 2 index known and {
    dup TTfonts exch get
    QUIET not {
      (Substituting font ) print dup =only
      ( for ) print 1 index =only (.) = flush
    } if
    exch 3 1 roll pdffindfont
    //true .copyfontdict
    2 copy exch /FontName exch put
    exch pop .completefont
  } {
    pdffindfont
  } ifelse
} bind executeonly def

% Read an embedded TrueType font.
/readtruetype {		% <font-resource> <stream-dict> readtruetype <font>
  1 index exch
  PDFfile fileposition 3 1 roll
  //true resolvestream readfontfilter
                % Stack: filepos fontres stream
  1 index /CIDSystemInfo oknown {
    1 index /CIDSystemInfo get dup type /packedarraytype eq {exec}if
    dup /Registry known not {
      (   **** Warning: a CIDFont's CIDSystemInfo is missing the required Registry entry\n) pdfformatwarning
      dup /Registry (Adobe) put
    } if
    dup /Ordering known not {
      (   **** Warning: a CIDFont's CIDSystemInfo is missing the required Ordering entry\n) pdfformatwarning
      dup /Ordering (Identity) put
    } if
    dup /Supplement known not {
      (   **** Warning: a CIDFont's CIDSystemInfo is missing the required Supplement entry\n) pdfformatwarning
      dup /Supplement 0 put
    } if
    3 1 roll
    1 index /Subtype knownoget {
      /CIDFontType2 ne {
        (   **** Error: Subtype of a TT CID font is not /CIDFontType2\n) pdfformaterror
        1 index /Subtype /CIDFontType2 put
        (               Output may be incorrect.\n) pdfformaterror
      } if
    } {
      (   **** Error: Subtype of a TT CID font is missing.\n) pdfformaterror
      1 index /Subtype /CIDFontType2 put
      (               Output may be incorrect.\n) pdfformaterror
    } ifelse

    1 index /BaseFont get                 % Use the BaseFont name for the font. Otherwise we
                                          % would use the name table, or a manufactured name.
    .loadttcidfont
                                          % Stack: filepos fontres cidfont
  } {
                                          % filepos fontres stream
    1 index /FontDescriptor oget
    /Flags oget 4 and 0 ne {
       //true  %  symbolic
    } {
       1 index /Encoding oknown not  % no encoding => symbolic
    } ifelse

    2 index /Encoding oknown {
      StandardEncoding
      3 index getencoding
    } {
      //null
    } ifelse

    dup 4 index exch                      % filepos fontres stream is_symbolic Encoding fontres Encoding
    /prebuilt_encoding exch put           % filepos fontres stream is_symbolic Encoding
    5 index /BaseFont get                 % Use the BaseFont name for the font. Otherwise we
                                          % would use the name table, or a manufactured name.
    .loadpdfttfont
  } ifelse
  exch pop
  PDFfile 3 -1 roll setfileposition
                % Ignore both the Encoding and the Widths.
  exch pop
} bind executeonly def

% ---------------- Type 0 fonts ---------------- %

% Predefine the known CMaps, but only create them on demand.
/knownCMaps mark
  /Identity-H { /Identity-H 0 makeIdentityCMap }
  /Identity-V { /Identity-V 1 makeIdentityCMap }
.dicttomark def

/makeIdentityCMap {		% <cmapname> <wmode> .makeIdentityCMap -
  .currentglobal //true .setglobal 3 1 roll
  /CIDInit /ProcSet findresource begin
  12 dict begin
    begincmap
    /WMode exch def
    /CMapName exch def
    /CIDSystemInfo 3 dict dup begin
      /Registry (Adobe) def
      /Ordering (Identity) def
      /Supplement 0 def
    end def
    %/CMapName (see above)
    /CMapVersion 1 def
    /CMapType 1 def
    %WMode (see above)
        % The PDF documentation says that these CMaps map CIDs
        % "1 to 65,536".  This is a misprint for 0 to 65,535.
    1 begincodespacerange
        % <0001> <00ff>  <0100> <ffff>
      <0000> <ffff>
    endcodespacerange
    1 begincidrange
        % <0001> <00ff> 1   <0100> <ffff> 256
      <0000> <ffff> 0
    endcidrange
    endcmap
    CMapName currentdict /CMap defineresource
    knownCMaps CMapName 2 index put
  end		% CMap
  end		% CIDInit ProcSet
  exch .setglobal
} bind executeonly def

/CMap_read_dict 3 dict begin
  /defineresource % <name> <dict> <cat-name> defineresource <dict>
  {
    pop
    /.last_CMap_def 1 index store
    exch pop
  } bind executeonly def
  /CIDSystemInfo
  {
    (   **** Error: CMap has invalid syntax near CIDSystemInfo.\n)  pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    /CIDSystemInfo
  } bind executeonly def % A work around a bug in Altona.Page_3.2002-09-27.pdf - a slash is missed.
  /CMapName
  {
    (   **** Error: CMap has no CMapName.\n\
        See the comment to revision 6201 in gs/doc/ps2pdf.htm#Problems .\n) pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    /CMap1   % arbitrary, PDF defineresource tolerates non-unique names
  } bind executeonly def % A work around incorrect ToUnicode CMap generated by GS before rev. 6201.
currentdict end readonly def

% Read an embedded stream that we *hope* is a PostScript CMap. According
% to the spec, ths isn't legal, but 'Acrobat opens it'....
%
/read_CMap {
  dup mark exch 0 (begincodespacerange) /SubFileDecode filter cvx exec
  cleartomark
  {currentdict dup /CMapType known not {end}{pop exit} ifelse} loop
  /CMapType 1 def
  mark exch % emulate 'begincodespacerange'
  0 (endcmap) /SubFileDecode filter cvx /begincmap cvx exch 2 .execn
  endcmap
  currentdict end
  dup /CMapName get exch
  /CMap defineresource end
} bind executeonly def

% Read embedded CMap stream.
% if the <wmode> parameter is null, it indicates there is no WMode, and we
% should not add one.
% Following Acrobat we ignore everything outside
% begincodespacerange .. endcmap.
/read_CMap_stream {  % <info> <wmode> <name> <stream> read_CMap <CMap>
  dup 0 (begincodespacerange) /SubFileDecode filter flushfile
  //CMap_read_dict begin
  /CIDInit /ProcSet findresource begin
  12 dict begin
  /o.endmapvalue /.endmapvalue load def
  /.endmapvalue
  {
    dup 65535 gt
    {
      (   **** Warning: CMap: CID out of valid range (0-65535).\n)  pdfformatwarning
      pop 65535
    } if
    o.endmapvalue
  } bind def
  4 2 roll
  dup //null eq { pop } { /WMode exch def } ifelse
  dup //null eq { pop } { /CIDSystemInfo exch def } ifelse
  /CMapType 1 def
  /.last_CMap_def currentdict def % establish binding
  mark exch % emulate 'begincodespacerange'
  0 (endcmap) /SubFileDecode filter cvx /begincmap cvx exch 2 .execn
  currentdict /o.endmapvalue undef
  endcmap
  /.last_CMap_def load
  { currentdict end //CMap_read_dict eq { exit } if } loop
  dup /.last_CMap_def undef
  /CMap defineresource
} bind executeonly def

currentdict /CMap_read_dict undef

/buildType0 {		% <Type0-font-resource> buildType0 <font>
  dup /BaseFont get	% FontName
  1 index /Encoding oget
  dup type /nametype eq {
    dup /CMap resourcestatus {
        pop pop /CMap findresource
    } {
        knownCMaps 1 index .knownget
          { exch pop exec } { /undefined signalerror } ifelse
    } ifelse
  } {
    %% Bug #696449 Acrobat will read an embedded PostScript
    %% CMap, whcih according to the spec is not valid, it needs
    %% to be a PDF CMap stream. Here we check and see if it looks like a CMap
    %% dictionary. If it is we proceed, if its some other kind of dictionary,
    %% throw an error, if its neither, treat it as a stream and hope for the best.
    dup /Type known {
      dup /Type get /CMap eq {
      PDFfile fileposition exch
      dup /CIDSystemInfo knownoget {
        << exch { oforce } forall >>
      } {
        //null
      } ifelse exch
      dup /WMode knownoget not {//null} if exch
      dup /CMapName knownoget not {/null} if exch
      //true resolvestream
      read_CMap_stream
      exch PDFfile exch setfileposition
      } {
        PDFSTOPONERROR {
          /buildType0 cvx /syntaxerror signalerror
        } if
      } ifelse
    }{
      PDFfile fileposition exch
      //true resolvestream
      read_CMap
      exch PDFfile exch setfileposition
    } ifelse
  } ifelse		% CMap
  [
    3 index /DescendantFonts oget { exec resourcefont } forall
  ]			% subfonts
  .composefontdict  % composefont must insert FontInfo dictionary - see gs_cmap.ps .
                    % Stack: fontres name font
  3 copy exch pop //null .processToUnicode
  exch pop .completefont % Stack: fontres font

  1 index /FontMatrix knownoget {
    dup aload pop //true {0 0 1 0 0 1} {3 -1 roll eq and} forall {
      1 index exch makefont exch /FontName get exch
      exch pop .completefont
    } {
      pop
    } ifelse
  } if exch pop
} bind executeonly def

% ---------------- CIDFontType0/2 fonts ---------------- %

% Insert metrics into a CIDFont, by saving the PDF W, W2, DW, and DW2
% arrays and using a (currently very inefficient) CDevProc.
% For detail, refer "PDF Reference" 2nd ed., p314 "5.6.3 CIDFonts".
% It notes default DW is 0, but Acrobat Reader uses 1000 as default.
% If DW is 0, currentpoint does not move by default in rendering text
% horizontally, the result is unreadable. You can check it by Acrobat.

/.pdfDefaultDW  1000 def
/.pdfDefaultDW2 [ 880 -1000 ] def

/addCIDmetrics {	% <CIDFont-resource> <CIDFont> addCIDmetrics <fontdict>
  dup length 5 add dict .copydict
  dup /FID undef
  dup /UniqueID undef
  dup /XUID undef
        % Insert the widths into the font.

        % Stack: pdfresource newfont

  1 index /DW knownoget {
    1 index /DW 3 -1 roll put
  } {
    dup /DW .pdfDefaultDW put
  } ifelse

  1 index /W knownoget {
    //false 1 index { xcheck or } forall {
      oforce_array
    } if
    dup 2 index /W 3 -1 roll put
    .pdfMakeInternalW 1 index /.internalW 3 -1 roll put
  } if

  1 index /DW2 knownoget {
    1 index /DW2 3 -1 roll put
  } {
    dup /DW2 .pdfDefaultDW2 put
  } ifelse

  1 index /W2 knownoget {
    //false 1 index { xcheck or } forall {
      oforce_array
    } if
    dup 2 index /W2 3 -1 roll put
    .pdfMakeInternalW2 1 index /.internalW2 3 -1 roll put
  } if

  dup /CDevProc 1 index /CIDWProc load /exec load 3 packedarray cvx put
  exch pop
} bind executeonly def

/.pdfMakeInternalMTXArray { % <mtx_array> <item_size> .pdfConvertInternalW <mtx_array'>
  % convert /W or /W2 to internal expression
  %
  %   mtx_array: original /W or /W2 array
  %   item_size: number of metrics values per CID
  %
  %   for detail of the metrics list format in PDF,
  %   refer PDF Ref. p.317 "Glyph Metrics in CIDFonts".
  %
  %   format of single entry in internal expression
  %
  %     [
  %       [cid_begin cid_end]
  %       value_is_varied (bool)
  %       [ [values for cid_begin...]
  %         [values for cid_begin + 1]
  %         ... ]
  %     ]
  %

  7 dict
  begin
    /itemSize exch def
    /M exch def			% original /W or /W2
    /Msize M length def
    /Mi { M i get } def		% W[i]
    /Mi1 { M i 1 add get } def	% W[i + 1]
    /putMTXEntry <<
      /arraytype   {
         [
           [Mi Mi Mi1 length itemSize idiv add 1 sub]
           //true
           [
             0 itemSize Mi1 length 1 sub {
               [ exch 1 1 index itemSize add 1 sub { Mi1 exch get } for ]
             } for
           ]
         ]
         /i i 2 add def
      }
      /integertype {
         [
           [Mi Mi1]
           //false
           [[ i 2 add 1 i 1 add itemSize add { M exch get } for ]]
         ]
         /i i 2 add itemSize add def
      }
    >> def

    /i 0 def

    [ { putMTXEntry Mi1 type get exec i Msize ge { exit } if } loop ]
  end
} executeonly def

/.pdfMakeInternalW  { dup length 0 gt { oforce_recursive 1 .pdfMakeInternalMTXArray } if } executeonly def
/.pdfMakeInternalW2 { dup length 0 gt { oforce_recursive 3 .pdfMakeInternalMTXArray } if } executeonly def

/.pdfGetMTXByCID { % <internalMTXArray> <cid>
                   %     .pdfGetMTXByCID
                   %         { <MTXEntry> true | false }

  % get values for given CID from internal format of /W or /W2

  exch
  {
    {
      dup 0 get {} forall      % Stack: <cid> <entry> <cid_0> <cid_1>
      3 index lt { pop pop //false exit } if
      2 index exch sub dup 0 lt { pop pop //false exit } if
      1 index 1 get not { pop 0 } if
      exch 2 get exch get //true exit
    } loop
    { exit } if
  } forall
  dup type /arraytype eq { exch pop //true } { pop //false } ifelse
} executeonly def

% Apply the [D]W[2] metrics to a character before displaying.
/CIDWProc {		% <w0x> <w0y> <llx> <lly> <urx> <ury>
                        %   <w1x> <w1y> <vx> <vy> <cid> <font> CIDWproc
                        %   <w0x'> ... <vy'>
  begin % push <font> to currentdict
    % <w1x> <w1y> <vx> <vy> won't be used and replaced, discard now
    5 1 roll pop pop pop pop

    % get FontMatrix that applies to this CID
    % (needs to convert [D]W[2] values to glyph space)
    currentdict /FontMatrix get
    % if the currentfont is a CIDFontType 0 CIDFont,
    % we need FDArray font's FontMatrix too
    FontType 9 eq {
        currentdict 2 index .type9mapcid
        % <w0x> <w0y> <llx> <lly> <urx> <ury> <cid> <FontMatrix> (charstring) <FDArray#>
        exch pop currentdict /FDArray get exch get /FontMatrix get
        % <w0x> <w0y> <llx> <lly> <urx> <ury> <cid> <FontMatrix> <FontMatrix2>
        matrix concatmatrix
    } if
    % preserve this FontMatrix at bottom of the stack
    8 1 roll
    % Stack: <FontMatrix> <w0x> <w0y> <llx> <lly> <urx> <ury> <cid>

    {
      currentdict /DW .knownget not {   % no DW
        .pdfDefaultDW exit              % replace <w0x> by defaultDW
      } if

      currentdict /.internalW .knownget not {    % no W
        exit                            % use already-stacked DW
      } if

      dup length 0 eq {                 % W is null array
        pop                             % discard unusable W
        exit                            % use already-stacked DW
      } if

      % W is finite array, try to get W_cid
      2 index .pdfGetMTXByCID {           % got W, discard DW
        exch pop {} forall
        exit
      } if

      exit
    } loop
    0                           % <w0y'>

    % Stack: <FontMatrix> <w0x> <w0y> <llx> <lly> <urx> <ury> <cid> <w0x'> <w0y'>
    9 -2 roll pop pop           % discard <w0x> <w0y>
    7  2 roll                   % put <w0x'> <w0y'>

    % Stack: <FontMatrix> <w0x'> <w0y'> <llx> <lly> <urx> <ury> <cid>
    0                           % <w1x'>
    exch                        % put <w1x'>

    % Stack: <FontMatrix> <w0x'> <w0y'> <llx> <lly> <urx> <ury> <w1x'> <cid>
    {
      currentdict /DW2 .knownget not {  % no DW2, use defaultDW2
        .pdfDefaultDW2 exit
      } if

      currentdict /.internalW2 .knownget not {   % has DW2, no W2
        exit                            % use already-stacked DW2
      } if

      dup length 0 eq {                 % W2 is null array
        pop                             % discard unusable W2
        exit                            % use already-stacked DW2
      } if

      2 index .pdfGetMTXByCID {		% got W2_cid, discard DW2
        exch pop
        exit
      } if

      % could not get W2_cid
      exit

    } loop

    exch pop                            % discard <cid>

    % Stack: <FontMatrix> <w0x'> <w0y'> <llx> <lly> <urx> <ury>
    %                           <w1x'> { [<vy'> <w1y'>] | [<w1y'> <vx'> <vy'>] }
    dup length 2 eq {                   % this is DW2
      aload pop
      exch 8 index 2 div                % <vx'> = <w0x'> / 2
      exch
    } {                                 % assume W2
      aload pop
    } ifelse
    % Stack: <FontMatrix> <w0x'> <w0y'> <llx> <lly> <urx> <ury> <w1x'> <w1y'> <vx'> <vy'>

    % now, convert each metrics valude (1000th of text space) to glyph space
    10 -2 roll
    % Stack: <FontMatrix> <llx> <lly> <urx> <ury> <w1x'> <w1y'> <vx'> <vy'> <w0x'> <w0y'>
    3 {
        10 index idtransform exch 1000 div exch 1000 div
        6 2 roll
    } repeat
    10 2 roll
    % Stack: <FontMatrix> <w0x'> <w0y'> <llx> <lly> <urx> <ury> <w1x'> <w1y'> <vx'> <vy'>
    11 -1 roll pop
    % Stack: <w0x'> <w0y'> <llx> <lly> <urx> <ury> <w1x'> <w1y'> <vx'> <vy'>
  end                                   % recover currentdict
} bind executeonly def

% <string> <match> tailmatch ==> <pre> true
%                            ==> <string> false
/tailmatch {
  2 copy length 1 index length .min
  dup 2 index length exch sub exch getinterval
  1 index eq {
    length 1 index length exch sub
    0 exch getinterval //true
  } {
    pop //false
  } ifelse
} bind executeonly def

/makeboldfont {
  16 dict begin
    /strokewidth exch def
    /basecidfont exch def
    /FontMatrix [ 1 0 0 1 0 0 ] def

    /CIDFontName /.boldfont def
    /CIDFontType 1 def

    /basefont-H /.basefont-H /Identity-H [ basecidfont ] composefont def
    /basefont-V /.basefont-V /Identity-V [ basecidfont ] composefont def

    /CIDSystemInfo dup basecidfont exch get def
    /FontBBox [ basecidfont /FontBBox get cvx exec
      4 2 roll basecidfont /FontMatrix get transform
      4 2 roll basecidfont /FontMatrix get transform
    ] def

    /tmpstr 2 string def
    /BuildGlyph {
      gsave
      exch begin
        dup 256 idiv tmpstr exch 0 exch put
        256 mod tmpstr exch 1 exch put
        rootfont /WMode known { rootfont /WMode get 1 eq } { //false } ifelse
        { basefont-V } { basefont-H } ifelse setfont
        strokewidth setlinewidth
        1 setlinejoin
        newpath
        0 0 moveto tmpstr //false charpath stroke
        0 0 moveto tmpstr show
        currentpoint setcharwidth
      end
      grestore
    } bind def

   currentdict
  end
  dup /CIDFontName get exch /CIDFont defineresource
} bind executeonly def

% <CIDFont-resource> <CIDFontName> findCIDFont <CIDFont-resource> <font>
%   CIDFont-resource is not modified.
/findCIDFont {
  {
    dup /CIDFont resourcestatus {
      pop pop dup /CIDFont findresource
      dup /Path known
      1 index /ResourcePath known or
      { exch pop exit }
      { pop dup /CIDFont undefineresource }
      ifelse
    } if
    .remove_font_name_prefix
    dup dup length string cvs

    (,Bold) tailmatch {
      exch pop
      % If we're substituting a standard weight font for a
      % "Light,Bold" font, don't artificially bolden further
      dup (Light) tailmatch
      {
        pop cvn findCIDFont dup /FontName .knownget
        {
          (Light) tailmatch exch pop
        }
        {
          //true
        } ifelse

        {
          0.03 makeboldfont
        } if
      }
      {
        pop
        cvn findCIDFont 0.03 makeboldfont
      } ifelse
      exit
    } if
    (,Italic) tailmatch {
      exch pop
      cvn findCIDFont
      [ 1 0 0.3 1 0 0 ] makefont
      exit
    } if
    (,BoldItalic) tailmatch {
      exch pop
      % see above
      dup (Light) tailmatch
      {
        pop cvn findCIDFont dup /FontName .knownget
        {
          (Light) tailmatch exch pop
        }
        {
          //true
        } ifelse

        {
          0.03 makeboldfont
        } if
      }
      {
        pop
        cvn findCIDFont 0.03 makeboldfont
      } ifelse
      [ 1 0 0.3 1 0 0 ] makefont
      exit
    } if
    QUIET not {
      (Can't find CID font ") print dup =string cvs print (".) = flush
    } if
    pop

    1 index /CIDSystemInfo oget begin Registry (-) Ordering end
    concatstrings concatstrings
    cvn
    QUIET not {
      (Attempting to substitute CID font ) print dup ==only
      ( for ) print 1 index ==only (, see doc/Use.htm#CIDFontSubstitution.) = flush
    } if
    exch pop
    dup /CIDFont resourcestatus {
      pop pop /CIDFont { findresource } stopped
      {pop}{exit} ifelse
    } if
    QUIET not {
      (The substitute CID font ") print dup =string cvs print
      (" is not provided either. ) print
    } if

    PDFNOCIDFALLBACK {
      PDFSTOPONERROR {
        (Will exit with error.) = flush
      }
      {
        (Will attempt to continue, but content may be missing.) = flush
      } ifelse
      exit
    } if

    QUIET not {
      (attempting to use fallback CIDFont.) print
      (See doc/Use.htm#CIDFontSubstitution.) = flush
    } if

    PDFNOCIDFALLBACK not {
      % This previously worked by loading the substitute font, and using that
      % as a "template" to create a new CIDFont dictionary with the CIDSystemInfo
      % dict appropriate for the requested font.
      % This, however, caused problems with the CIDMap and thus broke pdfwrite.
      % Hence, we now modify the CIDFont resource .map dictionary on the fly
      % so it includes an appropriate mapping, so the subsitute font is loaded
      % from the beginning with the correct ordering and supplement settings.
      /CIDFont /Category findresource /.map get dup /CIDFallBack .knownget {
        dup type /dicttype eq {
          dup /FileType get /TrueType eq {
            currentglobal
            4 1 roll
            dup gcheck setglobal
            dup length dict copy dup
            6 index /CIDSystemInfo oget dup /Ordering oget exch /Supplement get
            % we have to copy the string, for VM correctness
            exch dup length string copy exch 2 array astore
            /CSI exch put 2 index exch .forceput
            exch setglobal
            {
              % This *should* not execute arbitrary Postscript, so we ought to
              % be safe running in a stopped context, in knowledge we know how
              % to clean up afterwards - this would not be safe if CIDFallBack
              % were a "real" CIDFont.
              /CIDFont findresource
            }
            % if the above fails, try just using the CIDFallBack font directly
            stopped
            {
              pop
              % First, since it didn't work, remove the entry from the CIDFont category
              % .map dictionary.
              currentglobal exch
              /CIDFont /Category findresource /.map get
              dup gcheck setglobal
              exch undef
              setglobal

              (Warning: falling back to Identity ordering\n) print flush
              /CIDFallBack /CIDFont findresource
            } if
            exit
          } executeonly if
        } if
      } if

      pop pop pop
      /CIDFallBack

      QUIET not {
        (The fallback CID font ") print dup =string cvs print
        (" is not provided. ) print
        ( Finally attempting to use ArtifexBullet.\n) print flush
      }if

      % We'll just use Identity for this, we have only one glyph anyway.
      /ArtifexBullet /CIDFont resourcestatus {
        pop pop pop
        /ArtifexBullet /CIDFont findresource
        exit
      }
      {
        pop /ArtifexBullet
      } ifelse

      QUIET not {
        (The CID font ") print dup =string cvs print
        (" is not provided. ) print
        PDFSTOPONERROR
        {
          (Will exit with error.) = flush
        }
        {
          (Will continue, but content may be missing.) = flush
        } ifelse
      } if
    } executeonly if
    /findresource cvx /undefined signalerror
  } executeonly loop
} bind executeonly odef

/buildCIDType0 {	% <CIDFontType0-font-resource> buildCIDType0 <font>
  dup /BaseFont get findCIDFont exch pop
} bind executeonly def

/buildCIDType2 {	% <CIDFontType2-font-resource> buildCIDType2 <font>
  dup /BaseFont get findCIDFont exch pop
} bind executeonly def

/processCIDToGIDMap { % <fontres> <cidfont> processCIDToGIDMap <fontres> <cidfont>
  1 index /CIDToGIDMap knownoget {
    PDFfile fileposition 4 1 roll
    dup /Identity eq {
      pop
    } {
      //true resolvestream
                % Stack: filepos fontres font mapstream
      [
      { counttomark 1 add index 32768 string readstring not {
          counttomark 1 eq {
            exch pop dup length
          } {
            ] dup 0 exch { length add } forall
          } ifelse
          exit
        } if
      } loop
      2 idiv
        % Stack: filepos fontres font mapstream array/string CIDCount
      dup 0 ne {
        3 index exch /CIDCount exch put
        exch closefile exch
        dup /CIDMap 4 -1 roll put
      }{
        % If CIDCount is zero, ignore it
        pop pop closefile
      }ifelse
    } ifelse
    3 2 roll PDFfile exch setfileposition
  } if
} bind executeonly def

% Adjust a CIDFontType0 DW[2] in the font resource.
/adjustCIDType0 {		% <font-resource> <font> adjustfont <font'>
  dup /FontType get 1 eq {
    (   **** Error: Font resource has a wrong /Subtype.\n)  pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    adjustfont
  } {
    addCIDmetrics
    dup /CIDFontName get exch /CIDFont defineresource
  } ifelse
} bind executeonly def

% Adjust a CIDFontType2 DW[2] and CIDToGIDMap in the font resource.
/adjustCIDType2 {		% <font-resource> <font> adjustfont <font'>
  dup /FontType get 1 eq {
    (   **** Error: Font resource has a wrong /Subtype.\n)  pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    adjustfont
  } {
    addCIDmetrics
    dup /CIDFontType get 2 eq {   % OpenType CFF font converts to CIDFontType 0
      processCIDToGIDMap          %  that ignores CIDMap.
    } if
    dup /CIDFontName get exch /CIDFont defineresource
  } ifelse
} bind executeonly def

% ---------------- Other embedded fonts ---------------- %

% Read an embedded compressed font.
/readType1C {		% <font-resource> <stream-dict> readType1C <font>
  1 index exch
  PDFfile fileposition 3 1 roll
  dup //true resolvestream dup readfontfilter
                % Stack: pos resource streamdict stream filter
  3 index /FontDescriptor oget /FontName oget
  1 index
  /FontSetInit /ProcSet findresource begin //true //false ReadData
  %% We need to be careful not to corrupt the stack if something went wrong.
  %% Previously, if the dict was length 0 (an error occured) we would end up
  %% unable to recover the stack in the calling procedure.
  %% Bug #695819.
  dup length 0 ne {
    { exch pop exit } forall
    7 1 roll
  }{
    /invalidfont signalerror
  } ifelse
  closefile closefile pop
  PDFfile 3 -1 roll setfileposition
  pop pop
} bind executeonly def

% Read an embedded CFF CIDFont.
/readCIDFontType0C {  % <font-resource> <stream-dict> readCIDFontType0C <font>
  PDFfile fileposition 3 1 roll
  dup //true resolvestream dup readfontfilter
                % Stack: pos resource streamdict stream filter
  3 index /FontDescriptor oget /FontName oget
  1 index
  /FontSetInit /ProcSet findresource begin //true //true ReadData pop
  closefile closefile pop
  PDFfile 3 -1 roll setfileposition
                % Some broken Adobe software produces PDF files in which
                % the FontName of the CFF font and the FontName in the
                % FontDescriptor don't match the BaseFont in the font.
                % Use the FontName, rather than the BaseFont, here.
  dup /FontDescriptor oget /FontName oget /CIDFont findresource
  addCIDmetrics dup /CIDFontName get exch /CIDFont defineresource
} bind executeonly def

% Read an embedded OpenType font.
/readOTTOfont {		% <font-resource> <stream-dict> readOTTOfont <font>
  1 index exch                    % res res strdict
  PDFfile fileposition 3 1 roll   % res pos res strdict
  dup //true resolvestream        % res pos res strdict stream
  dup readfontfilter              % res pos res strdict stream filter
  3 index /FontDescriptor oget
  /FontName oget                  % res pos res strdict stream filter /name
  1 index .init_otto_font_file    % res pos res strdict stream filter /name filter'
  //true
  6 index /CIDSystemInfo known    % res pos res strdict stream filter /name filter' bool bool
  ReadData                        % res pos res strdict stream filter fontset
  { exch pop exit } forall        % res pos res strdict stream filter font
  dup /FontType get 9 eq  {
    % OpenType may contain simple CFF font, which is accesed as a CIDFont by PDF.
    % The font is converted to Type 9 CIDFont resource, which ignores CIDMap attribute.
    % The following code just shuffles GlyphDirectory to the same effect.
    4 index /CIDToGIDMap knownoget {
      dup type /dicttype eq {
        1 index /GlyphDirectory get exch       % res pos res strdict stream filter font dir c2g
        //true resolvestream                   % res pos res strdict stream filter font dir c2g_file
        256 dict begin
        0 2 index 0 get def  % copy .notdef
        0 1 16#7fffffff {
          1 index read not { pop exit } if     % res pos res strdict stream filter font dir c2g_file cid hi
          256 mul                              % res pos res strdict stream filter font dir c2g_file cid hi
          2 index read not { pop pop exit } if % res pos res strdict stream filter font dir c2g_file cid hi lo
          add                                  % res pos res strdict stream filter font dir c2g_file cid gid
          dup 0 ne {
            dup 4 index length lt {
              3 index exch get                 % res pos res strdict stream filter font dir c2g_file cid charstr
              def                              % res pos res strdict stream filter font dir c2g_file
            } {
              pop pop
            } ifelse
          } {
            pop pop
          } ifelse
        } for
        closefile pop                          % res pos res strdict stream filter font
        dup length dict copy                   % res pos res strdict stream filter font'
        dup /GlyphDirectory currentdict put    % res pos res strdict stream filter font'
        end
        dup /GlyphDirectory get 0 exch {
          pop .max
        } forall
        1 index exch /CIDCount exch 1 add put
      } {
      pop
      } ifelse
    } if
  } if
  7 1 roll                        % font res pos res strdict stream filter
  closefile closefile pop pop     % font res pos
  PDFfile exch setfileposition    % font res
  pop                             % font
} bind executeonly def

% ---------------- Font lookup ---------------- %

% Some PDF files mis-identify font type of the embedded font streams or
% include raw PFB font streams. Length1, Length2, Length3 may be wrong or
% missing. Adobe Acrobat corrects these errors transparently to the user.
%
% We ignore the font type keys and recognize the font type by the 1st 4 bytes
% of the font stream. The PFB stream is recognized by the 1st 2 bytes.

/fonttypeprocs mark		% <font-resource> -proc- <font>
  /Type0 //buildType0
  /Type1 //buildType1
  /MMType1 //buildType1
  /Type3 /buildType3 load
  /TrueType //buildTrueType
  /CIDFontType0 //buildCIDType0
  /CIDFontType2 //buildCIDType2
.dicttomark readonly def

/adjustfonttypes mark
  /Type1 //adjustfont
  /MMType1 //adjustfont
  /TrueType //adjustfont
  /CIDFontType0 //adjustCIDType0
  /CIDFontType2 //adjustCIDType2
.dicttomark readonly def

% Bind a proc and define n names
% /name ... /name {proc} n bndef -
/bndef
  { exch bind executeonly exch
    { dup 3 1 roll def } repeat
    pop
  } bind executeonly def

% <res> run-fonttypeproc <font>
/run-fonttypeproc {
  dup /Subtype knownoget not { 0 } if % res /subtype
  //fonttypeprocs 1 index known not {
    (   **** Error: Font /Subtype attribute is wrong or missing, /Type1 assumed.\n)
    pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    pop /Type1
    2 copy /Subtype exch put
  } if
  //fonttypeprocs exch get exec
} bind executeonly def

% Prototype for all procedures: <res> <desc> <stream> foo <font>
/font_tag_dict 13 dict begin

  % When the font stream is absent or cannot be read we load the font by the name.
  /no_stream
    { pop pop
      run-fonttypeproc
    } bind executeonly def

  /bad_stream
    { (   **** Error: Error reading font stream, attempting to load the font using its name\n)
      pdfformaterror
      (               Output may be incorrect.\n) pdfformaterror
      //no_stream exec
    } bind executeonly def

  <8001>          % PFB
    { dup /PFB //true put
      exch pop readtype1
    } bind executeonly def

  (%!PS) (%!Fo)   % Type1
    { exch pop readtype1
    } 2 bndef

  <01000401> <01000402> <01000403> <01000404> % Type 1C
  <01000C02> <01000C03>
    { exch pop
      1 index /Subtype knownoget dup { pop /CIDFontType0 eq } if {
        readCIDFontType0C
      } {
        readType1C
      } ifelse
    } 6 bndef

  <00010000> (true) (typ1) (ttcf)  % TrueType OpenType
    { exch pop readtruetype
    } 4 bndef

  (OTTO)
    { exch pop
      readOTTOfont
    } bind executeonly def

currentdict end readonly def
currentdict /bndef undef

% Used to create a hash for the XUID, ths combines the input PDF file name and the
% object number (currently the object number of the FontDescriptor). NB we *must*
% use an object number, as otherwise all fonts will have the same
% XUID and Ghostscript will think they are the same font. Ths routine must not
% be used unless we have an object number which is believed to be uniqe to
% a particular font instance.
/.CRCHashFilenameAndObject % object_number (filename) CRCHasFilename integer
{
    dup                     % object_number (filename) (filename)
    length                  % object_number (filename) length
    0 exch                  % object_number (filename) hash length
    1 sub                   % object_number (filename) hash length-1
    0 1 3 -1 roll           % object_number (filename) hash 0 1 length-1
    {                       % object_number (filename) hash index
      2 index exch get      % object_number (filename) hash char
      exch                  % object_number (filename) char hash
      dup 16#F8000000 and   % object_number (filename) char hash top5bits
      -27 bitshift          % object_number (filename) char hash top5>>27
      exch 5 bitshift       % object_number (filename) char top5>>27 hash<<5
      16#7FFFFFFF and
      xor                   % object_number (filename) char CRC<hash>
      xor                   % object_number (filename) newhash
    } for
    exch pop              % object_number newhash
    dup 16#F8000000 and   % object_number newhash top5bits
    -27 bitshift          % object_number newhash top5>>27
    exch 5 bitshift       % object_number top5>>27 newhash<<5
    16#7FFFFFFF and
    xor                   % object_number CRC<newhash>
    xor                   % final hashed value
}bind executeonly def

% Either patch or create a new XUID based on the existing
% XUID or UniqueID and incorporating the PDF object number
% so we get an XUID we can use to improve cache efficiency
% in multipage documents.
/patch_font_XUID     % <font dict> <patch> patch_font_XUID <font dict'>
{
  dup //null eq
  {pop}
  {
    //pdfdict /InputPDFFileName .knownget {.CRCHashFilenameAndObject} if
    exch dup /.OrigUniqueIDXUID .knownget not
    {
      dup /XUID .knownget not
      {
        dup /UniqueID .knownget
        {1 array astore}{ [] } ifelse
      } if
    } if

    dup //null eq
    {
          pop exch pop
    }
    {
      [ 1000000 3 -1 roll 4 index exch {exch} forall ]
      exch //true .copyfontdict
      dup 3 -1 roll /XUID exch put
      exch pop
      .completefont
    } ifelse
  } ifelse
} bind executeonly def

/resourcefont                   % <font-resource> resourcefont <font>
{
  dup /PSFont .knownget dup {
    pop /FID knownoget dup { pop type /fonttype eq } if
  } if {
    /PSFont get
  } {

    dup /Subtype get /Type0 eq {
      % if the font was defined in-line, we won't have a object number
      dup /.gs.pdfobj# .knownget not { //null } if
    } {
        dup /FontDescriptor knownoget {
          % if the font was defined in-line, we won't have a object number
          dup /.gs.pdfobj# .knownget not { //null }if
          dup //null eq {
            exch pop
          }{
            exch dup /FontFile knownoget not {
             dup /FontFile2 knownoget not {
                dup /FontFile3 knownoget not {
                  pop pop //null
                } {pop pop}ifelse
              } {pop pop}ifelse
            }{pop pop}ifelse
          }ifelse
        }{
          //null
        } ifelse
    } ifelse
    3 1 roll

    % In the event we have a Type 0 dictionary with a spurious
    % FontDescriptor object, remove it here to prevent confusion
    % later on.
    % Bug 691589
    dup /Subtype get /Type0 eq 1 index /FontDescriptor known and
    {
        dup /FontDescriptor undef
    }if
    dup /CIDSystemInfo .knownget
    {
      oforce_recursive
      1 index exch /CIDSystemInfo exch put
    } if

    dup dup /FontDescriptor knownoget {
                                          % font-res font-res font-desc
      % The same font descriptor can be reused in a CID and non-CID contexts.
      % Store CID and non-CID fonts under different keys. Bug 689301
      1 index /Subtype knownoget dup {
        pop dup /CIDFontType0 eq exch /CIDFontType2 eq or
      } if { /CIDFontObject } { /FontObject } ifelse
                                          % font-res font-res font-desc /key
      2 index 1 index .knownget {
        4 1 roll pop pop pop              % font-res obj
      } {
        4 1 roll                          % /key font-res font-res font-desc

        dup /FontFile knownoget not {
          dup /FontFile2 knownoget not {
            dup /FontFile3 knownoget not {
              //null
            } if
          } if
        } if
                                          % /key res res desc stream
        dup //null ne {
          PDFfile fileposition
          mark {
            2 index //true resolvestream dup
            4 string readstring pop
            exch closefile
          } stopped {
            cleartomark /bad_stream
          } {
            exch pop
          } ifelse
          PDFfile 3 -1 roll setfileposition
          dup length 4 lt { pop /bad_stream } if
        } {
          /no_stream
        } ifelse
                                          % /key res res desc stream tag

        //font_tag_dict 1 index known not {
          dup 0 2 getinterval <8001> eq {
            0 2 getinterval               % /key res res desc stream pfb_tag
          } {
            (12345678>\n) dup /ASCIIHexEncode filter dup 4 -1 roll writestring closefile
            (   **** Error: unrecognized font file starts with <) exch concatstrings
            pdfformaterror
            (               Output may be incorrect.\n) pdfformaterror
            /no_stream                    % /key res res desc stream unknown_tag
          } ifelse
        } if
        //font_tag_dict exch get          % /key res res desc stream {proc}
        { stopped } 0 get                 % /key res res desc stream {proc} --stopped--
        count                             % /key res res desc stream {proc} --stopped-- #
        countdictstack                    % /key res res desc stream {proc} --stopped-- # ##
        PDFfile fileposition              % /key res res desc stream {proc} --stopped-- # ## ###
        5 array astore cvx                % /key res res desc stream {{proc} --stopped-- # ## ###}
        exec
        4 -1 roll {
          PDFSTOPONERROR not {
            PDFfile exch setfileposition
            countdictstack exch sub 0 .max { end } repeat
            count 4 add exch sub 0 .max { pop } repeat
            //null
          } {
            /resourcefont cvx /undefinederror signalerror
          } ifelse
        } {
          PDFfile exch setfileposition
          countdictstack exch sub 0 .max { end } repeat
          count 3 sub exch sub 0 .max { pop } repeat
        } ifelse
        dup //null eq {
          PDFSTOPONERROR not {
            pop
            (   **** Error: can't process embedded font stream,\n        attempting to load the font using its name.\n)
            pdfformaterror
            (               Output may be incorrect.\n) pdfformaterror
            dup run-fonttypeproc            % /key res font
          } {
            /resourcefont cvx /undefinederror signalerror
          } ifelse
        } if
        1 index                           % /key res font res
        4 -1 roll 2 index                 % res font desc /key font
        put  % Save pointer to the font.
      } ifelse
    } {
      run-fonttypeproc
    } ifelse
        % Stack: font-res font
    1 index exch
    1 index /Subtype get
    //adjustfonttypes exch .knownget { exec } { exch pop } ifelse
    4 -1 roll patch_font_XUID
    dup 3 1 roll /PSFont exch put
  } ifelse
  dup checkGlyphNames2Unicode
} bind executeonly def

currentdict /font_tag_dict .undef
currentdict /fonttypeprocs .undef
currentdict /adjustfonttypes .undef

drawopdict begin
  /d0 {
    currentcolor currentcolorspace .swapcolors setcolorspace setcolor .swapcolors
    .adjustcharwidth setcharwidth
  } bind executeonly def
  /d1 {
    2 copy                           % ... llx lly urx ury | urx ury
    0 ne exch 0 ne                   % ... llx lly urx ury | ury!=0 urx!=0
    3 index 6 index eq and           % ... llx lly urx ury | ury!=0 (urx!=0 && llx==urx)
    exch 2 index 5 index eq and or { % ... llx lly urx ury | (urx!=0 && llx==urx) || (ury!=0 && lly==ury)
      % The bounding box is empty and likely incorrect. Don't cache.
      pop pop pop pop
      //d0 exec
    } {
      currentcolor currentcolorspace .swapcolors setcolorspace setcolor .swapcolors
      6 -2 roll .adjustcharwidth 6 2 roll setcachedevice
    } ifelse
  } bind executeonly def
  /Tf {
    1 index Page /Font rget {
      dup type /dicttype eq {
        resourcefont exch
        Tf pop
      }
      {
        PDFSTOPONERROR
        {
          /typecheck cvx signalerror
        }
        {
          % Bug 689450
          type
          (   **** Error: Tf refers to a resource key with an invalid value type: ) pdfformaterror
          .namestring pdfformaterror
          (. Assuming resource key: ) pdfformaterror
          1 index .namestring pdfformaterror
          ( is a font name.\n) pdfformaterror
          (               Output may be incorrect.\n) pdfformaterror
         Tf
        } ifelse
      }ifelse
    }
    {
      PDFSTOPONERROR
      {
          pop /undefined cvx signalerror
      }
      {
        % Bug 689037
        (   **** Error: Tf refers to an unknown resource name: ) pdfformaterror
        1 index .namestring pdfformaterror
        ( Assuming it's a font name.\n) pdfformaterror
        (               Output may be incorrect.\n) pdfformaterror
        Tf
      } ifelse
    } ifelse
  } bind executeonly def
end

end			% pdfdict
end			% GS_PDF_ProcSet
.setglobal