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%!
%%Creator: Eric Gisin <egisin@waterloo.csnet>
%%Title: Print font catalog
% Copyright (C) 2001-2018 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.
%
% Copyright (c) 1986 Eric Gisin
% Copyright (C) 1992 Aladdin Enterprises, Menlo Park, CA
%   Modified to print all 256 encoded characters.
% Copyright (C) 1993 Aladdin Enterprises, Menlo Park, CA
%   Modified to print unencoded characters.
% Copyright (C) 1994 Aladdin Enterprises, Menlo Park, CA
%   Modified to always create 256-element Encoding vectors.
% Copyright (C) 1995 Aladdin Enterprises, Menlo Park, CA
%   Modified to print more than 128 unencoded characters.
% Copyright (C) 1996 Aladdin Enterprises, Menlo Park, CA
%   Modified to leave a slightly wider left margin, because many H-P
%     printers can't print in the leftmost 1/4" of the page.
%   Modified to print unencoded characters in any font that has CharStrings.
% Copyright (C) 1999 Aladdin Enterprises, Menlo Park, CA
%   Modified to sort unencoded characters.
% Copyright (C) 2000 Aladdin Enterprises, Menlo Park, CA
%   Modified to print CIDFonts as well as fonts.
%   O(N^2) sorting replaced with O(N log N).
% Copyright transferred 2000/09/15 to Artifex Software, Inc.  Send any questions to
%   bug-gs@ghostscript.com.


% Example usages at bottom of file

/#copies 1 def
/min { 2 copy gt { exch } if pop } bind def

/T6 /Times-Roman findfont 6 scalefont def
/Temp 64 string def
/Inch {72 mul} def
/Base 16 def	% char code output base
/TempEncoding [ 256 { /.notdef } repeat ] def

% Sort an array.  Code used by permission of the author, Aladdin Enterprises.
/sort {			% <array> <lt-proc> sort <array>
        % Heapsort (algorithm 5.2.3H, Knuth vol. 2, p. 146),
        % modified for 0-origin indexing. */
  10 dict begin
  /LT exch def
  /recs exch def
  /N recs length def
  N 1 gt {
    /l N 2 idiv def
    /r N 1 sub def {
      l 0 gt {
        /l l 1 sub def
        /R recs l get def
      } {
        /R recs r get def
        recs r recs 0 get put
        /r r 1 sub def
        r 0 eq { recs 0 R put exit } if
      } ifelse
      /j l def {
        /i j def
        /j j dup add 1 add def
        j r lt {
          recs j get recs j 1 add get LT { /j j 1 add def } if
        } if
        j r gt { recs i R put exit } if
        R recs j get LT not { recs i R put exit } if
        recs i recs j get put
      } loop
    } loop
  } if recs end
} def

% do single character of page
% output to rectangle ll=(0,-24) ur=(36,24)
/DoGlyph {	% C, N, W set

  % print code name, width and char name
  T6 setfont
  N /.notdef ne {0 -20 moveto N Temp cvs show} if
  0 -12 moveto C Base Temp cvrs show (  ) show
  W 0.0005 add Temp cvs 0 5 getinterval show

  % print char with reference lines
  N /.notdef ne {
    3 0 translate
    0 0 moveto F24 setfont N glyphshow
    /W W 24 mul def
    0 -6 moveto 0 24 lineto
    W -6 moveto W 24 lineto
    -3 0 moveto W 3 add 0 lineto
    0 setlinewidth stroke
  } if
} def
/DoChar {
  /C exch def
  /N F /Encoding get C get def
  /S (_) dup 0 C put def
  /W F setfont S stringwidth pop def
  DoGlyph
} def
/CIDTemp 20 string def
/DoCID {
  /N exch def
  /C N def
  /W F setfont gsave
    matrix currentmatrix nulldevice setmatrix
    0 0 moveto N glyphshow currentpoint pop
  grestore def
  DoGlyph
} def

% print page title
/DoTitle {
  /Times-Roman findfont 18 scalefont setfont
  36 10.5 Inch moveto FName Temp cvs show ( ) show ((24 point)) show
} def

% print one block of characters
/DoBlock {	% firstcode lastcode
  /FirstCode 2 index def
  1 exch {
    /I exch def
    /Xn I FirstCode sub 16 mod def /Yn I FirstCode sub 16 idiv def
    gsave
    Xn 35 mul 24 add Yn -56 mul 9.5 Inch add translate
    I DoCode
    grestore
  } for
} def

% print a line of character
/DoCharLine {	% firstcode lastcode
  1 exch { (_) dup 0 3 index put show pop } for
} def
/DoCIDLine {	% firstcode lastcode
  1 exch { glyphshow } for
} def

% initialize variables
/InitDoFont {	% fontname font
  /F exch def		% font
  /FName exch def	% font name
  /F24 F 24 scalefont def
  /Line0 96 string def
  /Line1 96 string def
  /Namestring1 128 string def
  /Namestring2 128 string def
} def

% print pages of unencoded characters
/DoUnencoded {	% glyphs
  /Unencoded exch def
  /Count Unencoded length def

                % Print the unencoded characters in blocks of 128.

  0 128 Unencoded length 1 sub
   { /BlockStart 1 index def
     dup 128 add Unencoded length min 1 index sub
     Unencoded 3 1 roll getinterval TempEncoding copy
     /BlockEncoding exch def
     /BlockCount BlockEncoding length def
     save
     F /Encoding known {
       F length dict F
        { 1 index /FID eq { pop pop } { 2 index 3 1 roll put } ifelse }
       forall dup /Encoding TempEncoding put
       /* exch definefont
       /F exch def
       /F24 F 24 scalefont def
       /BlockStart 0 def
     } if

     DoTitle (, unencoded characters) show
     BlockStart dup BlockCount 1 sub add DoBlock
     F 10 scalefont setfont
     36 2.4 Inch moveto
    0 32 BlockCount 1 sub {
      0 -0.4 Inch rmoveto gsave
      dup 31 add BlockCount 1 sub min
      exch BlockStart add exch BlockStart add DoLine
      grestore
    } for
     showpage
     restore
   } for

} def

% print font sample pages
/DoFont {
  dup findfont InitDoFont
  /DoCode {DoChar} def
  /DoLine {DoCharLine} def

        % Display the first 128 encoded characters.

  DoTitle (, characters 0-127) show
  0 127 DoBlock
  F 10 scalefont setfont
  36 2.0 Inch moveto   0  31 DoLine
  36 1.6 Inch moveto  32  63 DoLine
  36 1.2 Inch moveto  64  95 DoLine
  36 0.8 Inch moveto  96 127 DoLine
  showpage

        % Display the second 128 encoded characters.

  DoTitle (, characters 128-255) show
  128 255 DoBlock
  F 10 scalefont setfont
  36 2.0 Inch moveto 128 159 DoLine
  36 1.6 Inch moveto 160 191 DoLine
  36 1.2 Inch moveto 192 223 DoLine
  36 0.8 Inch moveto 224 255 DoLine
  showpage

  F /CharStrings known
   {
                % Find and display the unencoded characters.

        /Encoded F /Encoding get length dict def
        F /Encoding get { true Encoded 3 1 roll put } forall
        [ F /CharStrings get
         { pop dup Encoded exch known { pop } if }
        forall ] {
          exch Namestring1 cvs exch Namestring2 cvs lt
        } sort DoUnencoded

   }
  if

} def

% print CIDFont sample pages
/DoCIDFont {
  dup /CIDFont findresource InitDoFont
  /DoCode {DoCID} def
  /DoLine {DoCIDLine} def

  [ 0 1 F /CIDCount get 1 sub { } for ] DoUnencoded
} def

% Do font samples
% /Times-Roman DoFont			% Test (less than a minute)
% /Hershey-Gothic-English DoFont	% Test (8 minutes)

% Do a complete catalog
% FontDirectory {pop DoFont} forall	% All fonts (quite a long time)
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