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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.
%

% Initialization file for Type 32 fonts.

% ------ Type 32 fonts ------ %

% We need LanguageLevel 2 or higher in order to have defineresource.
languagelevel dup 2 .max .setlanguagelevel

/BitmapFontInit mark

/.makeglyph32 systemdict /.makeglyph32 get
systemdict /.makeglyph32 .undef

/addglyph {	% ([wx wy llx lly urx ury] |
                %     [w0x w0y llx lly urx ury w1x w1y vx vy])
                %   <bitmap> <cid> <type32font> addglyph -
  1 index dup 2 index .removeglyphs
  22 string .makeglyph32
                % Stack: metrics bitmap cid font metstr
  3 index () ne {
                % Use G4 encoding to compress the bitmap.
                % Define a string large enough to hold the metrics,
                % an uncompressed bitmap (worst case = 5x expansion),
                % and the 2 RTC codes (3 bytes).
    dup length 4 index length 5 mul add 10 add
    65535 .min string
                % Stack: metrics bitmap cid font metstr buffer
    dup 0 3 index putinterval
    dup 2 index length 1 index length 1 index sub getinterval
                % Stack: metrics bitmap cid font metstr buffer bitbuf
    mark /Columns 8 index dup 4 get exch 2 get sub
      /Rows 10 index dup 5 get exch 3 get sub
      /K -1 /EndOfBlock //true /BlackIs1 //true
    .dicttomark /CCITTFaxEncode filter
                % Stack: metrics bitmap cid font metstr buffer filter
    dup 6 index writestring closefile
                % Find the end of the data by scanning backwards for the RTC.
                % There are 2 RTCs x 12 bits = 3 bytes to remove.
    {
      dup dup length 1 sub get 0 ne { exit } if
      0 1 index length 1 sub getinterval
    } loop
    0 1 index length 3 sub getinterval
    exch pop	% metstr
  } if
  1 index /CharStrings get 3 index 3 -1 roll put
  pop pop pop pop
} obind

/removeall {		% <type32font> removeall -
  0 65535 2 index removeglyphs pop
} obind

/.removeglyphs systemdict /.removeglyphs get
systemdict /.removeglyphs .undef

/removeglyphs {		% <cid_min> <cid_max> <type32font> .removeglyphs -
  3 copy .removeglyphs
  dup /CharStrings get dup {
                % Stack: cidmin cidmax font CharStrings cid bitmap
    pop dup 5 index ge { dup 4 index le { 2 copy undef } if } if pop
  } forall pop pop pop pop
} obind

.dicttomark /ProcSet defineresource pop

/.cidfonttypes where { pop } { /.cidfonttypes 6 dict def } ifelse
/CIDFontType4
{
  dup /FontType 32 .forceput
  dup /CharStrings 20 dict .forceput
  1 index exch .buildfont32 exch pop
} .bind executeonly odef
.cidfonttypes begin

4 /CIDFontType4 load def % CIDFontType 4 = FontType 32

end		% .cidfonttypes
currentdict /CIDFontType4 .forceundef

% Define the BuildGlyph procedure.
% Since Type 32 fonts are indexed by CID, there is no BuildChar procedure.
% The name %Type32BuildGlyph is known to the interpreter.
(%Type32BuildGlyph) cvn {	% <font> <cid> %Type32BuildGlyph -
  1 index /CharStrings get
                % Stack: font cid CharStrings
  dup 2 index .knownget {
    exch pop
  } {
    0 .knownget not {
      exch pop  % Stack: cid
      .getshowoperator /invalidfont signalerror
    } if
  } ifelse
                % Stack: font cid cstr
  dup //.getmetrics32	% use // because of .undef below
  dup 14 gt {
    8 index 8 index 13 3 roll setcachedevice2
  } {
    4 index 4 index 9 3 roll setcachedevice
  } ifelse
                % Stack: font cid cstr w h nmetrics llx lly
  6 -1 roll 4 -1 roll 1 index length 1 index sub getinterval
                % Stack: font cid w h llx lly bitstr
  dup () eq {
    pop pop pop
  } {
    mark /Columns 6 index /Rows 7 index /K -1 /EndOfBlock //false /BlackIs1 //true
    .dicttomark /CCITTFaxDecode filter 4 index 4 index //true
                % Stack: font cid w h llx lly filter w h //true
    [ 1 0 0 1 11 -2 roll exch neg exch neg ] 5 -1 roll imagemask
  } ifelse
  pop pop pop pop
} .bind def

systemdict /.getmetrics32 .undef

buildfontdict 32 /.buildfont32 cvx put

32 dup /FontType defineresource pop

.setlanguagelevel

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