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✏️ Editing: pdf_ops.ps

% 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.
%

% Definitions for most of the PDF operators.

.currentglobal //true .setglobal

% Define pdfmark.  Don't allow it to be bound in.
% Also don't define it in systemdict, because this leads some Adobe code
% to think this interpreter is a distiller.
% (If this interpreter really is a distiller, don't do this.)
systemdict /pdfmark known not
 { userdict /pdfmark { cleartomark } bind executeonly put } if

systemdict /pdfdict where { pop } { /pdfdict 325 dict put } ifelse
userdict /GS_PDF_ProcSet 256 dict dup begin

% ---------------- Abbreviations ---------------- %

/bdef { bind def } bind def

% ---------------- Graphics state stack ---------------- %

% PDF adds a number of parameters to the graphics state.
% We implement this by pushing and popping a dictionary
% each time we do a PDF gsave or grestore.
% The keys in this dictionary are as follows:
%	self			% identifies the dictionary as one of ours
%	ClipRect		% (optional)
%	Show
%	TextSaveMatrix		% matrix at time of BT (iff within BT/ET)
% (The following correspond directly to PDF state parameters.)
%	AlphaIsShape
%	FillConstantAlpha
%	FillColor
%	FillColorSpace
%	FillOverprint
%	SoftMask
%	StrokeConstantAlpha
%	StrokeColor
%	StrokeColorSpace
%	StrokeOverprint
%	TextSpacing
%	TextHScaling
%	Leading
%	TextFont
%	TextLineMatrix
%	TextMatrix
%	TextRise
%	TextRenderingMode
%	WordSpacing
% (The following is cached information derived from other graphics state params)
%	FontMatrixNonHV % TextFont.FontMatrix alters horz/vert glyph advance vector direction

/nodict 1 dict def
nodict /self { //nodict } executeonly put % to avoid recursion in dumps
nodict readonly pop

/dictbeginpage {	% <initialdict> dictbeginpage -
 20 dict copy dup begin
 1 packedarray cvx executeonly /self exch def
 graphicsbeginpage textbeginpage
} bind executeonly def
/endpage {	% - endpage -
 showpage end
} bind executeonly def

/graphicsbeginpage {
  initgraphics
  //true .setaccuratecurves
  currentdict /ClipRect knownoget { aload pop rectclip } if
  0 g  0 G //false op //false OP  0 OPM
  1 ca  1 CA //null SMask //false AIS  /Compatible BM //true TK
} bind executeonly def

% We must allow /Show to be set, otherwise a text operation can
% end up in infinite recursion with showfirst calling Show, and
% Show calling showfirst.
/gput_always_allow
1 dict dup begin
  /Show 0 def
end def

/gput		% <value> <key> gput -
 {
 dup //gput_always_allow exch known not currentdict /n known and {
 pop pop
 ( **** Error: Ignoring changes to the graphic state after operator 'W'.\n) pdfformaterror
 ( Output may be incorrect.\n) pdfformaterror
 } {
 exch currentdict //nodict eq { /self dup load end 5 dict begin def } if
 def
 } ifelse
 } bind executeonly def
currentdict /gput_always_allow .undef

/q {
  %% Special case, if we get a 'q' while accumulating clip/eoclip then
  %% we need to make sure we close the current dictionary, and reopen it after
  %% performing the gsave, so that the redefinition of 'n' in particular is correct
  currentdict /n known {
    currentdict            %% copy the dicitonary for the accumulation
    end                    %% and close it (NB *before* the gsave!)
    gsave //nodict begin   %% execute gsave and start 'nodict' just like normal
    begin                  %% reopen the accumulation dictionary.
                           %% when we execute 'n' this will close and we'll go back
                           %% to the regular 'nodict' opened above. This could cause some
                           %% odd interactions with 'Q' for unbalanced files.....
  } {
    %% ugly hackery to work around badly broken PDF file in Bug #695897. The file has nested BT/ET
    %% sections, and delimits them with q/Q. The problem is that our code to deal with nested
    %% text sections looks in the current dictionary for TextSaveMatrix, and a 'q' makes a brand
    %% new empty dictionary, so it defeats it.
    %% I tried copying the TextSaveMatrix from the parent state into this one, but that then causes
    %% other problems because we end up apllying the TextSaveMatrix when we shouold not. Attempting
    %% to clear the TextSaveMatrix from all saved states on ET then caused it not to be defined at
    %% times when we needed it.....
    %% This is all terribly flaky, but defining a new matrix inside gsaves that tells us that we had
    %% were already in a text block allows us to detect and cope with the nested BT's and leaving the
    %% original TextSaveMatrix behind allows the matching ET not to throw an error, as well as coping
    %% with the various other problems listed above. Its not pretty though.
    currentdict /TextSaveMatrix known {
      currentdict /TextSaveMatrix get matrix copy
      gsave //nodict begin
      /qTextSaveMatrix gput
    }{
      gsave //nodict begin
    }ifelse
  } ifelse
  PDFusingtransparency { .pushextendedgstate } if
} bind executeonly def

% Some PDF files have excess Q operators!
/Q {
  //false
  { currentdict /n known { end pop //true } { exit } ifelse
  } loop {
    (   **** Error: Encountered a 'Q' before finishing 'W' mode.\n)
    pdfformaterror
    (               Output may be incorrect..\n) pdfformaterror
  } if
  currentdict /self .knownget {
    exec //nodict eq {
      end
      PDFusingtransparency { .popextendedgstate } if
      % Restore graphics state, but do not modify path. Paths are not part
      % of the PDF graphics state; see 4.4.1 of PDF reference 3rd ed.
      % Collecting the path with one ctm and re-playing it with another ctm
      % transforms the path exactly as PDF needs.
      {.getpath} stopped {
      (   **** Error: unable to preserve current path, probable degenerate CTM, output may be incorrect.\n) pdfformaterror
      grestore newpath
      }{
      grestore newpath { exec } forall
      } ifelse
      //false
    } {
      //true
    } ifelse
  } {
    //true	% formaterror -- not a gsave dict
  } ifelse
  {
    (\n   **** Error: File has unbalanced q/Q operators \(too many Q's\)\n               Output may be incorrect.\n)

//pdfdict /.Qqwarning_issued .knownget
    {
      {
        pop
      }
      {
        currentglobal //pdfdict gcheck .setglobal
        //pdfdict /.Qqwarning_issued //true .forceput
        .setglobal
        pdfformaterror
      } executeonly ifelse
    } executeonly
    {
      currentglobal //pdfdict gcheck .setglobal
      //pdfdict /.Qqwarning_issued //true .forceput
      .setglobal
      pdfformaterror
    } executeonly ifelse
  } executeonly if
} bind executeonly odef

% Save PDF gstate
/qstate { % - qstate <qstate>
 gstate
} bind executeonly def

% Set PDF gstate
/setqstate { % <qstate> setqstate -
 { matrix setmatrix //false upath } stopped {
 pop setgstate newpath
 } {
 % Save the CTM, set identity during the uappend, then set the CTM
 exch setgstate matrix currentmatrix matrix setmatrix
 exch newpath uappend setmatrix
 } ifelse
} bind executeonly def

% ---------------- Color setting ---------------- %

/nullpatternproc { pop } bind executeonly def
/nullpattern mark
   /PatternType 1 /PaintType 1 /TilingType 3 /BBox [0 0 1 1]
   /XStep 1 /YStep 1 /PaintProc //nullpatternproc
.dicttomark readonly def

/PDFsetpattern {
     % Since multiple patterns may share
     % same data stream, we need to ensure
     % that the stream is at 0 position.
     % Making this consistently with resolveshading,
     % which applies ReusableStreamDecode filter
     % to the PS stream, which represents the
     % PDF stream in dynamics.

dup /Shading knownoget {
       dup /ShadingType oget 4 ge {
         /DataSource knownoget {
           dup type /filetype eq {
             0 setfileposition
           } {
             pop
           } ifelse
         } if
       } {
        pop
       } ifelse
     } if

% Associate pattern instance with the default qstate for the context.
     % A single pattren object can be reused in several contexts.
     dup DefaultQstate .knownget {
       exch pop
     } {
       % But don't update read-only initial null pattern.
       dup /PaintProc .knownget { //nullpatternproc ne } { //true } ifelse {
         dup dup /Matrix knownoget not { { 1 0 0 1 0 0 } } if

gsave
         .currentfillconstantalpha
         .currentstrokeconstantalpha
         DefaultQstate setqstate
         .setstrokeconstantalpha
         .setfillconstantalpha
         makepattern
         grestore

dup 3 1 roll
         DefaultQstate exch put
       } if
     } ifelse
} bind executeonly def

/CSdict mark
  /DeviceGray { 0 } bind executeonly
  /DeviceRGB { [0 0 0] cvx } bind executeonly
  /DeviceCMYK { [0 0 0 1] cvx } bind executeonly
  /CIEBasedA { 0 } bind executeonly
  /CIEBasedABC { [0 0 0] cvx } bind executeonly
  /CalGray { pop /DeviceGray 0 } bind executeonly
  /CalRGB { pop /DeviceRGB [0 0 0] cvx } bind executeonly
  /Lab {[0 0 0] cvx } bind executeonly
  /ICCBased { [ 1 index 1 oget /N get { 0 } repeat ] cvx } bind executeonly
  /Separation { 1 } bind executeonly
  /DeviceN {	% What is the correct value??
    [ 1 index 1 get length { 1 } repeat ] cvx
  } bind executeonly
  /Indexed { 0 } bind executeonly
  /Pattern { //nullpattern matrix makepattern } bind executeonly
.dicttomark readonly def

/ri {//.renderingintentdict exch .knownget { .setrenderingintent } if } bind executeonly def
/g  {/DeviceGray .setfillcolorspace .setfillcolor } bind executeonly def
/G  {/DeviceGray .setstrokecolorspace .setstrokecolor} bind executeonly def
/rg {/DeviceRGB .setfillcolorspace .setfillcolor} bind executeonly def
/RG {/DeviceRGB .setstrokecolorspace .setstrokecolor} bind executeonly def
/k  {/DeviceCMYK .setfillcolorspace .setfillcolor} bind executeonly def
/K  {/DeviceCMYK .setstrokecolorspace .setstrokecolor} bind executeonly def
/cs {dup dup type /nametype ne { 0 get } if
  dup /ICCBased eq {
    1 index 1 get /OrigN .knownget not {1 index 1 get /N get} if mark
    4 2 roll
    //CSdict exch get exec exch .setfillcolorspace exec {.setfillcolor} stopped
    {
    (error) == flush
      cleartomark
      [//null /DeviceGray //null /DeviceRGB /DeviceCMYK] exch
      {get} stopped
      {
        (   **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
        /setcolorspace cvx /undefined signalerror
      }
      {
        dup //null eq {
          (   **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
          /setcolorspace cvx /undefined signalerror
        }{
          ICCProfileNError flush not {
            (   **** Warning : Error setting an ICCBased colour space, using /N to set an alternate device space.\n) print
            (                  Output may be incorrect.\n) print
          } if
          setcolorspace
          /ICCProfileNError where {/ICCProfileNError //true put} if
        } ifelse
      }ifelse
    }{
      cleartomark pop
    }
    ifelse
  } {
    //CSdict exch get exec exch .setfillcolorspace exec .setfillcolor
  } ifelse
} bind executeonly def
/CS {dup dup type /nametype ne { 0 get } if
  dup /ICCBased eq {
    1 index 1 get /OrigN .knownget not {1 index 1 get /N get} if mark
    4 2 roll
    //CSdict exch get exec exch .setstrokecolorspace exec {.setstrokecolor} stopped
    {
      cleartomark
      [//null /DeviceGray //null /DeviceRGB /DeviceCMYK] exch
      {get} stopped
      {
        (   **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
        /setcolorspace cvx /undefined signalerror
      }
      {
        dup //null eq {
          (   **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
          /setcolorspace cvx /undefined signalerror
        }{
          ICCProfileNError flush not {
            (   **** Warning : Error setting an ICCBased colour space, using /N to set an alternate device space.\n) print
            (                  Output may be incorrect.\n) print
          } if
          setcolorspace
          /ICCProfileNError where {/ICCProfileNError //true put} if
        } ifelse
      }ifelse
    }{
      cleartomark pop
    }
    ifelse
  } {
    //CSdict exch get exec exch .setstrokecolorspace exec .setstrokecolor
  } ifelse
} bind executeonly def
/sc {.setfillcolor} bind executeonly def
/SC {.setstrokecolor} bind executeonly def
/sc* {.setfillcolor} bind executeonly def
/SC* {.setstrokecolor} bind executeonly def
/sc*_and_set {
  dup type /dicttype eq
  {
    dup /Type known
    {
      dup /Type get /Pattern eq {PDFsetpattern} if
    }
    {
      dup /PatternType known {PDFsetpattern} if
    } ifelse
  } if
  .setfillcolor
} bind executeonly def
/SC*_and_set {
  dup type /dicttype eq
  {
    dup /Type known
    {
      dup /Type get /Pattern eq {PDFsetpattern} if
    }
    {
      dup /PatternType known {PDFsetpattern} if
    } ifelse
  } if
  .setstrokecolor
} bind executeonly def
/sc1 {.setfillcolor} bind executeonly def
/SC1 {.setstrokecolor} bind executeonly def
/sc1_and_set {
  dup type /dicttype eq
  {
    dup /Type known
    {
      dup /Type get /Pattern eq {PDFsetpattern} if
    }
    {
      dup /PatternType known {PDFsetpattern} if
    } ifelse
  } if
  .setfillcolor
} bind executeonly def
/SC1_and_set {
  dup type /dicttype eq
  {
    dup /Type known
    {
      dup /Type get /Pattern eq {PDFsetpattern} if
    }
    {
      dup /PatternType known {PDFsetpattern} if
    } ifelse
  } if
  .setstrokecolor
} bind executeonly def
/csput {dup dup type /nametype ne { 0 get } if //CSdict exch get exec exch 2 copy .setfillcolorspace exec .setfillcolor .setstrokecolorspace exec .setstrokecolor} bind executeonly def
/csset {dup dup type /nametype ne { 0 get } if //CSdict exch get exec exch} bind executeonly def

% ---------------- Color setting ---------------- %

% ---------------- Overprint/transparency setting ---------------- %

/op { .setfilloverprint
} bind executeonly def	% NB pdf_draw:gsparamdict handled /OP with no /op
/OP { .setstrokeoverprint
} bind executeonly def
/OPM {
  /.setoverprintmode where { pop dup .setoverprintmode .swapcolors .setoverprintmode .swapcolors } { pop } ifelse
} bind executeonly def
/ca { .setfillconstantalpha } bind executeonly def
/CA { .setstrokeconstantalpha } bind executeonly def
/SMask {
  dup type /booleantype eq {
    .currentSMask type /dicttype eq {
      .currentSMask /Processed 2 index .forceput
    } executeonly
    {
      .setSMask
    }ifelse
  } executeonly
  {
  .setSMask
  }ifelse

%% This is some craziness to do with annotations and graphics states
  %% the original nodict can't be written to, and we haven't (I think) done
  %% a gsave, so we haven't copied it to /self, if we don't do that here
  %% then transparent annotations cause an invalid access error.
  currentdict //nodict eq {/self dup load end 5 dict begin def} if
} bind executeonly odef
/AIS { .setalphaisshape } bind executeonly def
/BM {
  /.setblendmode where {
    pop [ exch dup type /nametype ne { aload pop } if /Normal ] {
      { .setblendmode } //.internalstopped exec not { exit } if pop
    } forall
  } {
    pop
  } ifelse
} bind executeonly def
/TK {
  /.settextknockout where { pop .settextknockout } { pop } ifelse
} bind executeonly def

/UseBlackPtComp {
  %% Our implementation of black point compensation uses 0 or 1, not a boolean
  /.setblackptcomp where {pop //false eq {0}{1}ifelse .setblackptcomp }{ pop } ifelse
} bind executeonly def

% ---------------- Color installation ---------------- %

% Establish a given color (and color space) as current.
/.settransparencyparams {	% <alpha> <smask> .settransparencyparams -
 PDFusingtransparency {
 .currentalphaisshape
 {
 1 .setopacityalpha exch .setshapealpha 1
 } {
 1 .setshapealpha exch .setopacityalpha 0
 } ifelse
 % Set the soft mask by rendering the XObject. Doing this every time
 % is obviously very inefficient; we'll improve it later.
 .settransparencymask
 } {
 pop pop
 } ifelse
} bind executeonly def
/.settransparencymask {		% <paramdict> <masknum> .settransparencymask -
 exch dup type /dicttype ne {
 PDFusingtransparency {
 pop pop
 } {
 dup /Draw get exec
 } ifelse
 } {
 dup /Processed .knownget {
 {
 pop pop
 } {
 dup /Draw get exec
 }ifelse
 }{
 dup /Draw get exec
 } ifelse
 } ifelse
} bind executeonly def
% (Non-mask) images must execute setfillblend.
/setfillblend {
 .currentfillconstantalpha
 .currentSMask .settransparencyparams
} bind executeonly def
/setfillstate {
 setfillblend
} bind executeonly def
/setstrokestate {
 .currentstrokeconstantalpha
 .currentSMask .settransparencyparams
} bind executeonly def
/Cdict 15 dict dup begin	% <color...> <colorspace> -proc- -
 /DeviceGray { pop setgray } bind executeonly def
 /DeviceRGB { pop setrgbcolor } bind executeonly def
 /DeviceCMYK { pop setcmykcolor } bind executeonly def
 /CIEBasedA { setgcolorspace setcolor } bind executeonly def
 /CIEBasedABC /CIEBasedA load def
 /CIEBasedDEF /CIEBasedA load def
 /CIEBasedDEFG /CIEBasedA load def
 /CalRGB /CIEBasedA load def
 /CalGray /CIEBasedA load def
 /Lab /CIEBasedA load def
 %% This section is to deal with the horrible pair of files in Bug #696690 and Bug #696120
 %% These files have ICCBased spaces where the value of /N and the number of components
 %% in the profile differ. In addition the profile in Bug #696690 is invalid. In the
 %% case of Bug #696690 the /N value is correct, and the profile is wrong, in the case
 %% of Bug #696120 the /N value is incorrect and the profile is correct.
 %% We 'suspect' that Acrobat uses the fact that Bug #696120 is a pure image to detect
 %% that the /N is incorrect, we can't be sure whether it uses the profile or just uses
 %% the /N to decide on a device space. What we now do is; If the /N and device profile
 %% number of components don't match, we assume the device profile is correct and patch
 %% /N to be the same as the profile (see /ICCBased-resolve), but we save the original
 %% value of /N in /OrigN. In setcolor, if the space is a genuine ICCBased space
 %% (not a replacement for a device profile) we call set_dev_color which will actually
 %% exercise the profile. If that fails we return an error. Here we run setcolor in a
 %% stopped context, and if it fails we check to see if there is a /OrigN (ths occurs
 %% only if the /N was different to the number of components in the profile). If there
 %% is a /OrigN then prefer that to the profile, otherwise they agreed, so just use
 %% /N and select a device space. If we can't select a device space with the correct
 %% number of components, give up and throw an error. See also /last-ditch-bpc-csp
 %% in pdf_draw.ps.
 /ICCBased {
 dup 1 get
 dup /OrigN .knownget {exch /N get}{/N get dup} ifelse
 3 add mark exch 2 roll
 setgcolorspace {setcolor} stopped
 {
 cleartomark
 [//null /DeviceGray //null /DeviceRGB /DeviceCMYK] exch
 {get} stopped
 {
 ( **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
 /setcolorspace cvx /undefined signalerror
 }
 {
 dup //null eq {
 ( **** Error: Unable to set an ICCBased colour space, and cannot set an alternate from the number of components.\n) print
 /setcolorspace cvx /undefined signalerror
 }{
 ICCProfileNError flush not {
 ( **** Warning : Error setting an ICCBased colour space, using /N to set an alternate device space.\n) print
 ( Output may be incorrect.\n) print
 } if
 setcolorspace
 /ICCProfileNError //true def
 } ifelse
 }ifelse
 }{
 cleartomark pop
 }
 ifelse
 } bind executeonly def
 /Separation /CIEBasedA load def
 /DeviceN /CIEBasedA load def
 /Indexed /CIEBasedA load def
 /Pattern
 { setgcolorspace

% Since multiple patterns may share
     % same data stream, we need to ensure
     % that the stream is at 0 position.
     % Making this consistently with resolveshading,
     % which applies ReusableStreamDecode filter
     % to the PS stream, which represents the
     % PDF stream in dynamics.

dup 3 1 roll
 DefaultQstate exch put
 } if
 } ifelse
 setcolor
 } bind executeonly def
end def
/setgcolor	% (null | <color...>) <colorspace> setgcolor -
 { 1 index //null eq
 { pop pop }
 { dup 0 get //Cdict exch get exec }
 ifelse
 } bind executeonly def
% Compare the old and new color spaces in an attempt to avoid expensive
% reloads of CIEBased color spaces.
/PCSdict 15 dict dup begin	% <colorspace> -proc- <colorspace|pdfcspace>
 /CIEBasedA { dup 1 get /PDFColorSpace .knownget { exch pop } if } bind executeonly def
 /CIEBasedABC /CIEBasedA load def
 /CIEBasedDEF /CIEBasedA load def
 /CIEBasedDEFG /CIEBasedA load def
 /Indexed {
 dup 1 get dup pdfcolorspace 2 copy ne { 3 1 roll } if pop pop
 } bind executeonly def
end def
/pdfcolorspace {	% <colorspace> pdfcolorspace <colorspace|pdfcspace>
 dup type /arraytype eq {
 //PCSdict 1 index 0 get .knownget { exec } if
 } if
} bind executeonly def
/setgcolorspace {	% <colorspace> setgcolorspace -
 dup pdfcolorspace currentcolorspace pdfcolorspace eq {
 pop
 } {
 setcolorspace
 } ifelse
} bind executeonly def

/OPsavedict 2 dict def		% for saveOP, saveBM

% colorspaces that don't require special overprint transparency handling
/okOPcs mark /DeviceGray 0 /DeviceCMYK 1 /DeviceN 2 /Separation 3 .dicttomark def

/checkOPtrans	% <fillop|strokeop> checkOPtrans <bool>
% return true if OP needs special transparency treatment
% If the colorspace is not one where overprint makes sense, no special handling (return false)
% NB: This will get replaced with a quick "no-op" if the device doesn't support Overprint
{ % Check OP and BM in case we need to push a group
 okOPcs currentcolorspace 0 get dup /Indexed eq {
 pop currentcolorspace 1 get	% use the base space
 } if
 known {
 /stroke ne { .currentfilloverprint
 } { .currentstrokeoverprint
 } ifelse
 .currentblendmode dup /Normal eq exch /Compatible eq or not and
 } {
 pop //false
 } ifelse
} bind executeonly def

/fsexec		% <fillop|strokeop> fsexec -
{
 PDFusingtransparency {
 .currentSMask //null ne {
 mark /Subtype /Group /Isolated //true .dicttomark
 1 index /stroke eq {
 % BBox needs to include line width / line join expansion.
 gsave strokepath pathbbox grestore
 } {
 pathbbox	% fill/eofill cases
 } ifelse
 .begintransparencygroup
 .currentshapealpha .currentopacityalpha 3 -1 roll % avoid double application
 1 .setopacityalpha 1 .setshapealpha
 } if
 dup checkOPtrans exch 1 index {
 % We need to push a non-isolated, non-knockout transparency group and
 % perform the operation in CompatibleOverprint mode, then end the
 % transparency group. Do the begintransparencygroup step here.
 mark /Subtype /Group /Isolated //false .dicttomark pathbbox .begintransparencygroup
 .currentblendmode .currentopacityalpha 4 -2 roll % save current values
 /CompatibleOverprint .setblendmode 1 .setopacityalpha
 } if
 cvx exec
 {
 .endtransparencygroup .setopacityalpha .setblendmode	% end the CompatibleOverprint group
 } if
 .currentSMask //null ne {
 .endtransparencygroup .setopacityalpha .setshapealpha
 } if
 } {
 cvx exec
 } ifelse
} bind executeonly def

% ---------------- Path painting and clipping ---------------- %

%% Bug #696017 In order to get the correct position of paths and other objects which
%% are illegally present inside a text block, we need to use the saved TextSaveMatrix
%% to construct/place them. But we don't want to do lots of lookups on every segment of
%% a path (we feel its OK to do lookups for images). So what we do is redefine the
%% path contruction operators at the beginning of a text block, and put them back afterwards.
%% Here we define the 'normal' and 'inside text' versions of those operators, and routines
%% to switch the definitions back and forth.

/check_and_set_saved_matrix {
  currentdict /TextSaveMatrix known {
    currentdict /TextSaveMatrix get setmatrix
  }
  {
    currentdict /qTextSaveMatrix known {
      currentdict /qTextSaveMatrix get setmatrix
    } if
  } ifelse
} bind executeonly def

/normal_m { { moveto }  stopped { count pdfemptycount sub 2 .min { pop } repeat 0 0 moveto } if } bind executeonly def
/inside_text_m {
  {
    matrix currentmatrix 3 1 roll
    check_and_set_saved_matrix
    moveto
    setmatrix
  }
  stopped { count pdfemptycount sub 2 .min { pop } repeat 0 0 moveto } if
} bind executeonly def

/normal_l { { lineto }  stopped { count pdfemptycount sub 2 .min { pop } repeat } if } bind executeonly def
/inside_text_l {
  {
    matrix currentmatrix 3 1 roll
    check_and_set_saved_matrix
    lineto
    setmatrix
  }
  stopped { count pdfemptycount sub 2 .min { pop } repeat } if
} bind executeonly def

/normal_c { { curveto } stopped { count pdfemptycount sub 6 .min { pop } repeat } if } bind executeonly def
/inside_text_c {
  {
    matrix currentmatrix 7 1 roll
    check_and_set_saved_matrix
    curveto
    setmatrix
  }
  stopped { count pdfemptycount sub 6 .min { pop } repeat } if
} bind executeonly def

/normal_v { count pdfemptycount sub 4 ge {
         { currentpoint 6 2 roll curveto } stopped { count pdfemptycount sub 6 .min { pop } repeat  } if
       } {
         count pdfemptycount sub { pop } repeat
       } ifelse
     } bind executeonly def
/inside_text_v { count pdfemptycount sub 4 ge {
         {
           matrix currentmatrix 5 1 roll
           check_and_set_saved_matrix
           currentpoint 6 2 roll curveto
           setmatrix
         } stopped { count pdfemptycount sub 6 .min { pop } repeat  } if
       } {
         count pdfemptycount sub { pop } repeat
       } ifelse
     } bind executeonly def

/normal_y { { 2 copy curveto } stopped { count pdfemptycount sub 6 .min { pop } repeat } if } bind executeonly def
/inside_text_y {
  {
    matrix currentmatrix 5 1 roll
    check_and_set_saved_matrix
    2 copy curveto
    setmatrix
  }
  stopped { count pdfemptycount sub 6 .min { pop } repeat } if
} bind executeonly def

/normal_re {
   4 2 roll moveto  exch dup 0 rlineto  0 3 -1 roll rlineto  neg 0 rlineto
   closepath
  } bind executeonly def
/inside_text_re {
   matrix currentmatrix 5 1 roll
   check_and_set_saved_matrix
   4 2 roll moveto  exch dup 0 rlineto  0 3 -1 roll rlineto  neg 0 rlineto
   closepath
   setmatrix
  } bind executeonly def

/S {
  OFFlevels length 0 eq {
    setstrokestate .swapcolors /stroke fsexec .swapcolors
  } {
    newpath
  } ifelse
} bind executeonly def

/f {
  OFFlevels length 0 eq {
    setfillstate /fill fsexec
  } {
    newpath
  } ifelse
} bind executeonly def

/f* {
  OFFlevels length 0 eq {
    setfillstate /eofill fsexec
  } {
    newpath
  } ifelse
} bind executeonly def

/n { newpath } bind executeonly def		% don't allow n to get bound in

/s { closepath S } bind executeonly def

/B {
  OFFlevels length 0 eq {
         PDFusingtransparency {
                % knockout trans group around the filled and stroked object
                mark
                /Isolated //true /Knockout //true
                .dicttomark
                % strokepath will return empty path (no currentpoint) if nothing is stroked
                gsave { strokepath pathbbox } stopped grestore not {
            1 .setopacityalpha
                        .begintransparencygroup
                        gsave setfillstate fill grestore
                        setstrokestate .swapcolors /stroke fsexec .swapcolors
                        .endtransparencygroup
                } { newpath pop } ifelse
         } {
                gsave setfillstate fill grestore
                setstrokestate .swapcolors /stroke fsexec .swapcolors
        } ifelse
  } {
    newpath
  } ifelse
} bind executeonly def

/b { closepath B } bind executeonly def

/B* {
  OFFlevels length 0 eq {
         PDFusingtransparency {
                % knockout trans group around the filled and stroked object
                mark
                /Isolated //true /Knockout //true
                .dicttomark
                % strokepath will return empty path (no currentpoint) if nothing is stroked
                gsave { strokepath pathbbox } stopped grestore not {
            1 .setopacityalpha
                        .begintransparencygroup
                        gsave setfillstate eofill grestore
                        setstrokestate .swapcolors /stroke fsexec .swapcolors
                        .endtransparencygroup
                } { newpath pop } ifelse
         } {
                gsave setfillstate eofill grestore
                setstrokestate .swapcolors /stroke fsexec .swapcolors
        } ifelse
  } {
    newpath
  } ifelse
} bind executeonly def

/b* { closepath B* } bind executeonly def

% Clipping:

/Wdict 8 dict dup begin
/S { OFFlevels length 0 eq { gsave setstrokestate .swapcolors stroke .swapcolors grestore } if n } bind executeonly def
/f { OFFlevels length 0 eq { gsave setfillstate fill grestore } if n } bind executeonly def
/f* { OFFlevels length 0 eq { gsave setfillstate eofill grestore } if n } bind executeonly def
/B {
  OFFlevels length 0 eq {
    PDFusingtransparency {
      % knockout trans group around the filled and stroked object
      mark
      /Isolated //true /Knockout //true
      .dicttomark
      % strokepath will return empty path (no currentpoint) if nothing is stroked
      gsave {strokepath pathbbox } stopped grestore not
      {
        1 .setopacityalpha
        .begintransparencygroup
        gsave setfillstate fill grestore
        setstrokestate .swapcolors /stroke fsexec .swapcolors
        .endtransparencygroup
      } {
        newpath pop
      } ifelse
    } {
      gsave setfillstate fill grestore
      setstrokestate .swapcolors /stroke fsexec .swapcolors
    } ifelse
  } if
  n
} bind executeonly def
/b { closepath B } bind executeonly def
/B* {
  OFFlevels length 0 eq {
    PDFusingtransparency {
      % knockout trans group around the filled and stroked object
      mark
      /Isolated //true /Knockout //true
      .dicttomark
      % strokepath will return empty path (no currentpoint) if nothing is stroked
      gsave {strokepath pathbbox} stopped grestore not {
        1 .setopacityalpha
        .begintransparencygroup
        gsave setfillstate eofill grestore
        setstrokestate .swapcolors /stroke fsexec .swapcolors
        .endtransparencygroup
      } { newpath pop } ifelse
    } {
      gsave setfillstate eofill grestore
      setstrokestate .swapcolors /stroke fsexec .swapcolors
    } ifelse
  } if
  n
} bind executeonly def
/b { closepath B* } bind executeonly def
/n { end { currentpoint } stopped not { pop pop clip } if newpath } bind executeonly def
end readonly def
/W { //Wdict begin } bind executeonly def
/W*dict 8 dict dup begin
Wdict { def } forall
/n { end { currentpoint } stopped not { pop pop eoclip } if newpath } bind executeonly def
end readonly def
/W* { //W*dict begin } bind executeonly def
% ---------------- Text control ---------------- %

/textbeginpage
 {
   1.0 .settexthscaling
   /FontMatrixNonHV //false def
   /Show { showfirst } def
   /TextFillStateNeeded //true def
 } bind executeonly def

/TestDegenerateCTM {
  matrix currentmatrix
  dup 0 get
  exch dup 3 get
  exch dup 1 get
  exch 2 get
  mul
  3 1 roll mul
  exch sub
  0 eq {
    //true
  }{
    //false
  } ifelse
} bind executeonly def

% Contrary to the statement in the PDF manual, BT and ET *can* be nested,
% if the CharProc for a Type 3 font does a BT/ET itself.
% Since we always call the CharProc inside a q/Q, we simply ensure that
% the text state is saved and restored like the rest of the extended
% graphics state.

/settextmatrix {
  matrix currentmatrix
  matrix .currenttextmatrix
  concat
  TestDegenerateCTM {
    (\n   **** Error:  Degenerate text matrix detected, ignoring Tm operation\n) pdfformaterror
    (                 Output may be incorrect.\n) pdfformaterror
    setmatrix
  } {
    pop
  } ifelse
  .currenttexthscaling
  1 ne { .currenttexthscaling
  1 scale } if
  .currenttextrise 0 ne { 0 .currenttextrise
   translate } if
} bind executeonly def

/settextstate {
 % The text state can be set even outside BT/ET.
 currentdict /TextSaveMatrix known {
 TextSaveMatrix
 aload pop
 5 index 0 ne 3 index 0 ne and
 5 index 0 ne 5 index 0 ne and or not {
 (\n **** Error: Invalid (0 scaling) text matrix for Tm ****\n)
 pdfformaterror
 ( Output may be incorrect.\n) pdfformaterror
 % handle invalid scale by using a really small value
 2 -6 roll pop pop pop pop
 0.00000001 0 0 0.00000001
 6 -2 roll
 }if
 6 array astore
 setmatrix settextmatrix
 } if
 currentdict /qTextSaveMatrix known {
 qTextSaveMatrix
 aload pop
 5 index 0 ne 3 index 0 ne and
 5 index 0 ne 5 index 0 ne and or not {
 (\n **** Error: Invalid (0 scaling) text matrix for Tm ****\n)
 pdfformaterror
 ( Output may be incorrect.\n) pdfformaterror
 % handle invalid scale by using a really small value
 2 -6 roll pop pop pop pop
 0.00000001 0 0 0.00000001
 6 -2 roll
 }if
 6 array astore
 setmatrix settextmatrix
 } if
} bind executeonly def
/settextposition {
 % Update the TextMatrix translation.
 gsave TextSaveMatrix setmatrix
 {currentpoint} stopped not {
 .currenttextrise
 sub
 matrix .currenttextmatrix
 dup 5 4 -1 roll put
 dup 4 4 -1 roll put
 .settextmatrix
 % We would like to do "grestore currentpoint translate"
 % here, but some PDF files set a singular text matrix
 % (0 0 0 0 <x> <y> Tm), so we can't do this.
 TextTempMatrix identmatrix setmatrix currentpoint
 matrix .currenttextmatrix
 grestore
 .settextmatrix
 TextTempMatrix currentmatrix 4 2 getinterval astore pop
 TextTempMatrix setmatrix
 } {
 ( **** Error: Invalid currentpoint, probable degenerate CTM.\n) pdfformaterror
 ( Ignroing error, output may be incorrect.\n) pdfformaterror
 grestore
 } ifelse
} bind executeonly def

%% Do not make the procedures here executeonly. The /m procedure is
%% tested in /.pdf_paintproc in pdf_draw.ps, we need to be able to
%% read the name of the procedure from here in order to determine
%% whether we are inside a text block. The procedures themselves
%% are already executeonly anyway.

/switch_to_text_marking_ops {
    pdfopdict /m {inside_text_m} bind .forceput
    pdfopdict /l {inside_text_l} bind .forceput
    pdfopdict /c {inside_text_c} bind .forceput
    pdfopdict /v {inside_text_v} bind .forceput
    pdfopdict /y {inside_text_y} bind .forceput
    pdfopdict /re {inside_text_re} bind .forceput
} bind executeonly odef

/switch_to_normal_marking_ops {
    pdfopdict /m {normal_m} bind .forceput
    pdfopdict /l {normal_l} bind .forceput
    pdfopdict /c {normal_c} bind .forceput
    pdfopdict /v {normal_v} bind .forceput
    pdfopdict /y {normal_y} bind .forceput
    pdfopdict /re {normal_re} bind .forceput
} bind executeonly odef

/BT {
  currentdict /TextSaveMatrix known {
    (   **** Error: illegal nested BT operator detected.\n)
    pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    ET_NO_TXT_KO  %% Does not push any compositor actions
  } if

%% Bug #695897 see the explanation in /q defined above.
  currentdict /qTextSaveMatrix known {
    currentdict /qTextSaveMatrix get /TextSaveMatrix gput
    (   **** Error: Illegal nested BT operator (inside a gsave) detected.\n)
    pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    ET_NO_TXT_KO  %% Does not push any compositor actions
  } if
  currentdict /n known {
    currentdict end
    /.W exch def
  } if
  matrix .settextlinematrix
  matrix .settextmatrix

{ showfirst } /Show gput
  currentdict /TextSaveMatrix .knownget not {
    matrix dup /TextSaveMatrix gput
  } if currentmatrix pop settextmatrix
  matrix /TextTempMatrix gput		% see settextposition

%% Set the special version of the path constructoin operators, so that
  %% they will work as expected if they are illgeally present in a text block.
  switch_to_text_marking_ops

%% If needed, let the pdf14 device know we are in a BT condition.  This
  %% distinguishes BT from an Annotation /FreeText show command which also
  %% can come into pdf_text_begin with an opacity not equal to 1.
  PDFusingtransparency .currenttextknockout and {
    .begintransparencytextgroup
  } if

} bind executeonly def

/ET_NO_TXT_KO {
  currentdict /TextSaveMatrix known {
    .currenttextrenderingmode 4 ge { .currentfilladjust2 0 dup .setfilladjust2 clip .setfilladjust2} if
    newpath TextSaveMatrix setmatrix
    currentdict /TextSaveMatrix undef

% if we were in a W/W* context, grab the dict, undefine temp entry for it,
    % and push it back on the dict stack
    currentdict /.W known {
      .W
      currentdict /.W undef
      begin
    } if
  } {
     (   **** Error: Ignoring spurious ET operator.\n)
     pdfformaterror
     (               Output may be incorrect.\n) pdfformaterror
  } ifelse
  %% Only switch back to the regular marking operations if we were not
  %% in a nested text block (inside a gsave).
  currentdict /qTextSaveMatrix known not {
    switch_to_normal_marking_ops
  } if
} bind executeonly def

/ET {
  //ET_NO_TXT_KO exec
  % Group push occurred in pdf14_text_begin.
  PDFusingtransparency .currenttextknockout and {
    .endtransparencytextgroup
  } if
} bind executeonly def

/Tc { .settextspacing { showfirst } /Show gput } bind executeonly def
/TL { .settextleading } bind executeonly def
/Tr { .settextrenderingmode { showfirst } /Show gput } bind executeonly def
/Ts { .settextrise settextstate } bind executeonly def
/Tw { .setwordspacing { showfirst } /Show gput } bind executeonly def
/Tz {
  dup 0 eq {
    (\n   **** Error: Invalid 0.0 horizontal text scaling given for Tz\n)
    (                 Output may be incorrect.\n) pdfformaterror
    pdfformaterror
    pop 0.00000001	% handle invalid scale by using a really small value
  }{
    100 div
  }ifelse .settexthscaling %/TextHScaling gput
  settextstate} bind executeonly def

% ---------------- Font control ---------------- %

% Test if the FontMatrix could transform a horizontal/vertical (depending
% on writing mode) advance vector in glyph space into one with a different
% direction in text space.
% - if FontMatrix = [a b c d tx ty], this condition translates to:
% b != 0 for horizontal writing mode
% c != 0 for vertical writing mode
% - when false, we automatically have wy/x == 0 in text space whenever wy/x == 0
% in glyph space, and can avoid the slow method that is otherwise necessary
% to implement zeroing wy/x cf PDF Ref 5.3.3 "Text space details"
 % Worker procedure for testing a single font matrix
/?FontMatrixNonHV {		 % ?horz <<fontdict>> -- ?horz ?nonhv
 /FontMatrix .knownget {
 1 index { 1 } { 2 } ifelse get 0 ne
 } {
 //false
 } ifelse
} bind executeonly def
 % Worker procedure for recursive checking of font matrices
/?FontMatrixNonHV {		 % {self} ?horz <> -- {self} ?horz ?nonhv
 2 copy //?FontMatrixNonHV exec {	 % check the font's own FontMatrix
 pop pop //true
 } {
 % look for descendents/ components
 pop				 % {self} ?horz <>
 dup /FontType get
 dup 0 eq {			 % Type 0: look into FDepVector
 pop /FDepVector get 2 index	 % {self} ?horz [fonts..] {testproc}
 } {
 9 eq {			 % Type 9 (CIDFontType 0): check FDArray
 /FDArray get //?FontMatrixNonHV
 } {				 % all others: nothing more to check
 pop {} {}
 } ifelse
 } ifelse
 %stack: {self} ?horz [fonts..] {testproc}
 //false 5 2 roll {		 % {testproc} false {self} ?horz <<subfont>>
 4 index exec {
 4 -1 roll pop //true 4 1 roll
 exit
 } if
 } forall
 %stack: {testproc} ?nonhv {self} ?horz
 4 2 roll exch pop
 } ifelse
} bind executeonly def
 % Main procedure
/?FontMatrixNonHV {		% <<rootfont>> -- ?nonhv
 //?FontMatrixNonHV exch
 % determine WMode
 dup /WMode .knownget { 0 eq } { //true } ifelse % {proc} <<rootfont>> ?horz
 exch
 % call the worker procedure
 //?FontMatrixNonHV exec
 exch pop exch pop
} bind executeonly def

/Tf {		% <scale> Tf -
 dup .setPDFfontsize
 dup 0 eq {
 pop 0.00000001	% handle invalid scale by using a really small value
 } if
 1 index type /dicttype ne {
 selectfont currentfont
 } {
 dup 1 eq { pop } { scalefont } ifelse
 }
 ifelse
 dup ?FontMatrixNonHV dup FontMatrixNonHV ne {
 /FontMatrixNonHV gput
 { showfirst } /Show gput
 } {
 pop
 } ifelse
 setfont
} bind executeonly def

% Copy a font, removing its FID. If changed is true, also remove
% the UniqueID and XUID, if any. If the original dictionary doesn't have
% the keys being removed, don't copy it.
/.copyfontdict		% <changed> .copyfontdict <dict>
 {
 1 index /.OrigUniqueIDXUID .knownget
 {//false}
 {
 1 index /XUID .knownget
 {
 //true 1 index {0 gt and} forall
 {//false}{pop //true} ifelse
 }
 {
 //true
 }ifelse
 } ifelse

{
     1 index /UniqueID .knownget
     {[exch]}{//null} ifelse
   } if
   3 1 roll

1 index /FID known
   1 index { 2 index /UniqueID known or 2 index /XUID known or } if
    {		% We add 1 to the length just in case the original
                % didn't have a FID.
      exch dup length 1 add dict exch
       {		% Stack: changed newfont key value
         1 index /FID eq
         not { 3 copy put } if pop pop
       }
      forall exch
    }
   if pop

1 index //null eq
   {exch pop}
   {dup 3 -1 roll /.OrigUniqueIDXUID exch put}
   ifelse

} bind executeonly def

% Insert a new Encoding or Metrics into a font if necessary.
% Return a possibly updated font, and a flag to indicate whether
% the font was actually copied.
/.updatefontmetrics {	% <Metrics|null> .updatefontmetrics
 % <font'> <copied>
 dup //null ne {
 exch //true .copyfontdict dup /Metrics 4 -1 roll put //true
 } {
 pop //false
 } ifelse
} bind executeonly def

/.updatefontencoding {	% <Encoding|null> .updatefontencoding
 % <font'> <copied>
 dup //null ne { dup 2 index /Encoding get ne } { //false } ifelse {
 exch //false .copyfontdict dup /Encoding 4 -1 roll put //true
 } {
 pop //false
 } ifelse
} bind executeonly def

% Duplicate keys in CharString dictionary according to GlyphMap: <</new_glyph /old_glyph>>
% We have to do this because PDF fonts can associate multiple widths with the same glyph
% but Metrics dictionary works by the glyph name.
/.update_charstring {	% <GlyphMap> .update_charstring <font'> <copied>
 dup //null ne {
 exch //true .copyfontdict % map font
 dup dup /CharStrings get % map font font cstr
 dup length % map font font cstr len
 4 index length add % map font font cstr len+map_len
 dict copy dup begin % map font font cstr'
 /CharStrings exch put % map font
 exch { % font /new /old
 currentdict exch .knownget {
 def
 } {
 currentdict /.notdef .knownget {
 def
 } {
 pop
 % The font has no .notdef.
 % Could not resolve the conflict,
 % but either the font is invalid or the glyph name is never used.
 } ifelse
 } ifelse
 } forall
 end //true
 } {
 pop //false
 } ifelse
} bind executeonly def

/.updatefont {	 % <Encoding|null> <Metrics|null> <GlyphMap|null>
 % .updatefont <font'> <copied>
 4 2 roll % <Metrics|null> <GlyphMap> <Encoding|null>
 .updatefontencoding % <Metrics|null> <GlyphMap> bool
 4 1 roll exch % bool <Metrics|null> <GlyphMap>
 .update_charstring % bool <Metrics|null> bool
 3 1 roll exch % bool bool <Metrics|null>
 .updatefontmetrics % bool bool bool
 4 2 roll or or % is_copied
} bind executeonly def

% ---------------- Text positioning ---------------- %

/Td {
  %% Bug #695950 - invalid parameter to 'Td' operator
  %% Technically the parameters to Td are reals and can vary +/- 3.403x10^38
  %% However that would be kind of hard to validate, and in any event these
  %% are somewhat unlikely numbers. We validate against +/- 2^32 instead. If this
  %% should ever be a problem we'll have to modify this check.
  %% Testing reveals that Acrobat clamps these out of range values to 0, it doesn't
  %% simply ignore the error.
  exch dup dup 4294967295 ge exch 4294967295 neg le or {
    (   **** Error: invalid argument to Td, Treating argument as 0.\n) pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    pop 0
  } if
  exch dup dup 4294967295 ge exch 4294967295 neg le or {
    (   **** Error: invalid argument to Td, Treating argument as 0.\n) pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    pop 0
  } if
  matrix .currenttextlinematrix transform
  matrix .currenttextlinematrix
  dup 3 -1 roll 5 exch put
  dup 3 -1 roll 4 exch put
  .settextlinematrix
  matrix .currenttextlinematrix .settextmatrix

settextstate
} bind executeonly def
/TD { dup neg .settextleading Td } bind executeonly def
/T* { 0 .currenttextleading neg Td } bind executeonly def
/Tm {
  5 index 0 ne 3 index 0 ne and
  5 index 0 ne 5 index 0 ne and or not {
    (   **** Error: Invalid (0 scaling) text matrix for Tm ****\n)
    pdfformaterror
    (               Output may be incorrect.\n) pdfformaterror
    % handle invalid scale by using a really small value
    2 -6 roll pop pop pop pop
    0.00000001 0 0 0.00000001
    6 -2 roll
  }if
  matrix .currenttextlinematrix astore .settextlinematrix
  matrix .currenttextlinematrix .settextmatrix
  settextstate
} bind executeonly def

% ---------------- Text painting ---------------- %

/Vexch {
  rootfont /WMode knownoget { 1 eq { exch } if } if
} bind executeonly def

/textrenderingprocs [		% (0 is handled specially)
        % Painting-only modes
   { tf } executeonly { tS } executeonly { tB } executeonly { tn }
        % Clipping modes
   { gsave tf grestore tW } executeonly
   { gsave tS grestore tW } executeonly
   { gsave tB grestore tW } executeonly
   { tW } executeonly
] readonly def

/pdfwrite_textrenderingprocs [
        % Tr 0 - Fill
        { setfillstate show } bind executeonly
        % Tr 1 - Stroke
        { currentlinewidth exch setstrokestate
        % Need to set the stroke width to a value which gives the correct
        % width under pdfwrite. Pdfwrite uses (in text mode) an identity
        % CTM, so we need to calculate the stroke width which would result
        % if the CTM had been unity.
          currentlinewidth dup
          currentdict /qTextSaveMatrix known {
            matrix defaultmatrix idtransform qTextSaveMatrix dtransform
          }{
            matrix defaultmatrix idtransform TextSaveMatrix dtransform
          } ifelse
          abs 2 copy exch abs eq {
            pop
          }{
            % non-square scaling reduces to Text matrix in pdfwrite , so
            % we can ignore it. (wrong answer, but consistent)
            pop pop currentlinewidth
          }ifelse setlinewidth
          show setlinewidth} bind executeonly
        % Tr 2 - Fill then Stroke
        { currentlinewidth exch setstrokestate
        % Need to set the stroke width to a value which gives the correct
        % width under pdfwrite. Pdfwrite uses (in text mode) an identity
        % CTM, so we need to calculate the stroke width which would result
        % if the CTM had been unity.
          currentlinewidth dup
          currentdict /qTextSaveMatrix known {
            matrix defaultmatrix idtransform qTextSaveMatrix dtransform
          }{
            matrix defaultmatrix idtransform TextSaveMatrix dtransform
          } ifelse
          abs 2 copy exch abs eq {
            pop
          }{
            % non-square scaling reduces to Text matrix in pdfwrite , so
            % we can ignore it. (wrong answer, but consistent)
            pop pop currentlinewidth
          }ifelse setlinewidth
          setfillstate show setlinewidth} bind executeonly
        % Tr 3 - Neither fill nor stroke
        { setfillstate show } bind executeonly
        %
        % pdfwrite emits all text inside a gsave/grestore pair. As
        % a result we can't preserve any of the 'clip' modes, as the
        % clip gets undone by the restore. We need to handle the clip
        % separately.
        %
        % Tr 4 - Fill, add to clip
        { gsave 0 .settextrenderingmode
          setfillstate dup show grestore //true charpath } bind executeonly
        % Tr 5 - Stroke, add to clip
        { gsave 1 .settextrenderingmode
          currentlinewidth dup
          matrix defaultmatrix idtransform TextSaveMatrix dtransform
          abs 2 copy exch abs eq {
            pop
          }{
            % non-square scaling reduces to Text matrix in pdfwrite , so
            % we can ignore it. (wrong answer, but consistent)
            pop pop currentlinewidth
          }ifelse setlinewidth
          setstrokestate dup show grestore
          //true charpath} bind executeonly
        % Tr 6 - Fill, stroke, add to clip
        { gsave 2 .settextrenderingmode
          currentlinewidth dup
          currentdict /qTextSaveMatrix known {
            matrix defaultmatrix idtransform qTextSaveMatrix dtransform
          }{
            matrix defaultmatrix idtransform TextSaveMatrix dtransform
          } ifelse
          abs 2 copy exch abs eq {
            pop
          }{
            % non-square scaling reduces to Text matrix in pdfwrite , so
            % we can ignore it. (wrong answer, but consistent)
            pop pop currentlinewidth
          }ifelse setlinewidth
          setstrokestate setfillstate dup show grestore
          //true charpath} bind executeonly
        % Tr 7 - Add to clip
        { //true charpath} bind executeonly
] readonly def

/setstrokeforTrpreservation {
      % Check to see if the current device supports Tr
      /PreserveTrMode /GetDeviceParam .special_op {
          exch pop
      }{
          //false
      }ifelse
      {
        .currenttextrenderingmode 1 eq .currenttextrenderingmode 2 eq or
        .currenttextrenderingmode 5 eq .currenttextrenderingmode 6 eq or or {
          setstrokestate
          % Need to set the stroke width to a value which gives the correct
          % width under pdfwrite. Pdfwrite uses (in text mode) an identity
          % CTM, so we need to calculate the stroke width which would result
          % if the CTM had been unity. NOTE! Only interested in magnitudes,
          % not signs.
          currentlinewidth dup
          matrix defaultmatrix idtransform TextSaveMatrix dtransform
          abs 2 copy exch abs eq {
            pop
          }{
            % non-square scaling reduces to Text matrix in pdfwrite , so
            % we can ignore it. (wrong answer, but consistent)
            pop pop currentlinewidth
          }ifelse
          setlinewidth
      } if
    } if
} bind executeonly def

% conditionally set fillstate to avoid multiple operations during text operators
/settextfillstate {
  TextFillStateNeeded { setfillstate //false /TextFillStateNeeded gput } if
} bind executeonly def

% If current path is not known to be valid, use the clip path
/TextTransSetup {	% showarg path_valid TextTransSetup false showarg
                        % showarg path_valid false TextTransSetup prev_BM prev_opacity true showarg
   % NB: if 'show' is used, then we use the clippath, but a smaller bbox is preferred
   .currentSMask //null ne {
     dup mark /Subtype /Group /Isolated //true .dicttomark exch
     { pathbbox } { gsave clippath pathbbox grestore } ifelse
     .begintransparencygroup
   } if
   //null checkOPtrans {
     % We need to push a non-isolated, non-knockout transparency group and
     % perform the operation in CompatibleOverprint mode, then end the
     % transparency group. Do the begintransparencygroup step here.
     mark /Subtype /Group /Isolated //false .dicttomark exch
     { pathbbox } { gsave clippath pathbbox grestore } ifelse
     .begintransparencygroup
     OPsavedict dup /saveBM .currentblendmode put /saveOA .currentopacityalpha put % save current values
     /CompatibleOverprint .setblendmode 1 .setopacityalpha
   } {
     pop	% discard path_valid boolean
   } ifelse
} bind executeonly def

/TextTransTeardown {	% stack: path_valid
   .currentblendmode /CompatibleOverprint eq {
     % end the CompatibleOverprint group and restore the opacity and BM
     .endtransparencygroup
     OPsavedict dup /saveOA get .setopacityalpha /saveBM get .setblendmode
   } if
   .currentSMask //null ne {
     .endtransparencygroup
   } if
} bind executeonly def

/setshowstate
 {
   .currentwordspacing 0 eq .currenttextspacing
    0 eq and FontMatrixNonHV not and
    {
      % Check to see if the current device supports Tr
      /PreserveTrMode /GetDeviceParam .special_op {
          exch pop
      }{
          //false
      }ifelse
      {
              pdfwrite_textrenderingprocs .currenttextrenderingmode get
      }
      {
              .currenttextrenderingmode 0 eq
              currentfont /FontType get 3 eq .currenttextrenderingmode 3 eq not
              and or
               {
                { settextfillstate //false TextTransSetup show TextTransTeardown }
              } {
                .currenttextrenderingmode 3 eq {
                        % Some PDF files execute 'tm' with a singular matrix,
                        % and then use the text rendering mode 3.
                        % The graphics library currently cannot handle text
                        % operations when the CTM is singular.
                        % Work around this here.
                  {
                    matrix currentmatrix dup dup
                    dup 0 get 0 eq 1 index 1 get 0 eq and {
                      dup dup 2 get 0 eq { 0 }{ 1 } ifelse 1 put
                    } if
                    dup 2 get 0 eq 1 index 3 get 0 eq and {
                      dup dup 1 get 0 eq { 3 }{ 2 } ifelse 1 put
                    } if
                    setmatrix
                    currentpoint
                    % don't worry about transparency for invisible text
                    4 index settextfillstate show % Tr was set to graphic state.
                    moveto
                    setmatrix
                    % now set the currentpoint using the original matrix
                    gsave
                    setmatrix
                    //false charpath currentpoint newpath
                    grestore
                    moveto
                  }
                } {
                  { //false charpath textrenderingprocs .currenttextrenderingmode  get exec }
                } ifelse
              } ifelse
       } ifelse
    }
    {
      % If we are doing a plain old fill, or no text at all, *or* we are going to
      % a device supporting text rendering modes, then go through this route.
      %
      .currenttextrenderingmode 0 eq .currenttextrenderingmode 3 eq or
      currentfont /FontType get 3 eq or

/PreserveTrMode /GetDeviceParam .special_op {
          exch pop
      }{
          //false
      }ifelse
      % pdfwrite can't handle rendering modes which involve clipping
      .currenttextrenderingmode 4 lt and or
      % Tr was set to graphic state.
      {
        FontMatrixNonHV {
           {
             % preserve current line width around possible stroke setup
             currentlinewidth exch
             setstrokeforTrpreservation
             settextfillstate //false TextTransSetup
             [ .currenttextspacing .currentwordspacing 3 index
               {					    % str [... weach wword c undef|ythis xthis|undef
                 exch % will be removed, unless FontMatrix.xx/yy == 0 (FontMatrixNonHV already true)
                 Vexch pop                                  % str [... weach wword c wthis
                 3 index add exch 32 eq {1 index add} if    % str [... weach wword w
                 3 1 roll                                   % str [... w weach wword
               }
               % for the "exch" removed or not below, see comment in pdf_font.ps::getfontmetrics
               currentfont /FontMatrix get 0 3 Vexch pop get 0 ne {
                 1 1 index length 1 sub getinterval cvx
               } if
               cshow pop pop ]
             { xshow } { yshow } Vexch pop exec
             setlinewidth TextTransTeardown
           }
         } {
           .currentwordspacing
           0 eq {
             {
               { setstrokeforTrpreservation
                 settextfillstate //false TextTransSetup .currenttextspacing
                 0 Vexch 3 -1 roll ashow TextTransTeardown
               }
               currentlinewidth
               { setlinewidth }
               3 .execn
             }
           } {
              .currenttextspacing 0 eq {
                { % preserve current line width around possible stroke setup
                  { setstrokeforTrpreservation
                    settextfillstate //false TextTransSetup .currentwordspacing
                    0 Vexch 32 4 -1 roll .pdfwidthshow
                    TextTransTeardown
                  }
                  currentlinewidth
                  { setlinewidth }
                  3 .execn
                }
              } {
                { % preserve current line width around possible stroke setup
                  { setstrokeforTrpreservation
                    settextfillstate //false TextTransSetup .currentwordspacing
                    0 Vexch 32
                    .currenttextspacing 0 Vexch 6 -1 roll .pdfawidthshow TextTransTeardown
                  }
                  currentlinewidth
                  { setlinewidth }
                  3 .execn
                }
              } ifelse
           } ifelse
         } ifelse
       }
       {
         { currentlinewidth exch
           .currentwordspacing
           .currenttextspacing
                        % Implement the combination of t3 and false charpath.
                        % Note that we must use cshow for this, because we
                        % can't parse multi-byte strings any other way.
                        % Stack: string wword wchar
            {
             exch % will be removed, unless FontMatrixNonHV && FontMatrix.xx/yy == 0
                        % Stack: str wword wchar ccode xthis ythis
             Vexch pop currentpoint 6 3 roll
                        % Stack: str wthis xorig yorig wword wchar ccode
             (x) dup 0 3 index put
             %
             % for devices which can handle the text rendering mode we don't want
             % to decompose into paths, we want to do a 'show'. However pdfwrite
             % can't handle clipping text, so we *do* want to do the clip path
             % as a 'true charpath'.
             %
              /PreserveTrMode /GetDeviceParam .special_op {
                  exch pop
              }{
                  //false
              }ifelse {
               % NB we must have Tr at least 4 or the test above would have
               % taken a different path, so we *know* the Tr involves clipping
               % or we wouldn't be here. Subtract 4 from the Tr and preserve
               % that mode, then do a charpath so the clip path gets set up
               % correctly.
               gsave .currenttextrenderingmode 4 sub .settextrenderingmode
               setstrokeforTrpreservation
               setstrokestate settextfillstate //false TextTransSetup dup show grestore TextTransTeardown } if
             //false charpath
             3 copy 32 eq { add } { exch pop } ifelse
                        % Stack: str wthis xorig yorig wword wchar ccode wextra
             7 -3 roll moveto add
             0 Vexch rmoveto pop
            }
            % for the "exch" removed or not below, see comment in pdf_font.ps::getfontmetrics
            FontMatrixNonHV dup not exch {
              currentfont /FontMatrix get 0 3 Vexch pop get 0 ne
            } if {
              1 1 index length 1 sub getinterval cvx
            } if
           4 -1 roll cshow pop pop
           %
           % If the device doesn't handle text rendering modes then we now have a suitable
           % path, so call the correct routine to stroke/fill it (clip is handled when we
           % get ET).
           %
             /PreserveTrMode /GetDeviceParam .special_op {
                 exch pop not
             }{
                 //true
             }ifelse {
             textrenderingprocs .currenttextrenderingmode get exec
           } if
           setlinewidth
         }
       }
      ifelse
    }
   ifelse /Show gput
 } bind executeonly def
/showfirst { setshowstate Show } executeonly def

/Tj {
  {
    //true /TextFillStateNeeded gput
    0 0 moveto Show settextposition
  }
  OFFlevels length 0 eq {
    exec
  } {
    gsave nulldevice exec grestore
  } ifelse
  //true /TextFillStateNeeded gput
} bind executeonly def
/' { T* Tj } bind executeonly def
/" { exch Tc exch Tw T* Tj } bind executeonly def
/TJ {
  { 0 0 moveto {
      dup type /stringtype eq {
        Show
      } { -1000 div
        currentfont /ScaleMatrix .knownget { 0 get mul } if
        0 Vexch rmoveto
      } ifelse
    } forall settextposition
  //true /TextFillStateNeeded gput
  }
  OFFlevels length 0 eq {
    exec
  } {
    gsave nulldevice exec grestore
  } ifelse
  //true /TextFillStateNeeded gput
} bind executeonly def

% NB: We don't need clippath when filling or stroking
/tf {
  .currentPDFfontsize 0 eq not {
      //true /TextFillStateNeeded gput
      settextfillstate //true TextTransSetup currentpoint fill TextTransTeardown moveto
  } if
} bind executeonly def
/tn { currentpoint newpath moveto } bdef % Obsolete, never used.
% For stroking characters, temporarily restore the graphics CTM so that
% the line width will be transformed properly.
/Tmatrix matrix def
/tS
 {
   currentfont /FontType get 3 eq
   {
     settextfillstate //true TextTransSetup currentpoint fill TextTransTeardown moveto
   }
   {
    .currentPDFfontsize 0 eq not {
       setstrokestate //true TextTransSetup
       currentpoint //Tmatrix currentmatrix TextSaveMatrix setmatrix
       currentdict /qTextSaveMatrix known {qTextSaveMatrix setmatrix} if
       .swapcolors stroke TextTransTeardown .swapcolors
       setmatrix moveto
    } if
   } ifelse
   //true /TextFillStateNeeded gput
 } bind executeonly def

% Handle transparency the same as /B operator
/tB {
       PDFusingtransparency {
          % knockout trans group around the filled and stroked object
          mark
          /Isolated //true /Knockout //true
          .dicttomark
          1 .setopacityalpha
          % While text will always have a currentpoint, strokepath seems to mess with it.
          % we get the currentpoint, then use moveto to restore it for pathbbox
          gsave currentpoint strokepath moveto pathbbox grestore
          .begintransparencygroup
          gsave tf grestore tS
          .endtransparencygroup
        } {
          gsave tf grestore tS
        } ifelse
   //true /TextFillStateNeeded gput
} bind executeonly def

% This does the wrong thing if there have been multiple text operations
% within a single BT/ET pair, but it's a start.
/tW { } bind executeonly def

%% split a string containing \r or \n into multiple strings)
%% \r\n is also handled.
%% (string) .splitstring (string1) (string2) .....
/.splitstring {
  0 exch                       %% start_index string
  dup length 1 sub             %% start_index string (string length - 1)
  0 1 3 -1 roll                %% start_index string 0 1 (string_length -1)
  {                            %% start_index string loop_index
    dup                        %% start_index string loop_index loop_index
    2 index exch get           %% start_index string loop_index character
    dup 10 eq exch 13 eq or {  %% start_index string loop_index
      dup 3 index              %% start_index string loop_index loop_index start_index
      sub                      %% start_index string loop_index (loop_index - start_index)
      dup 0 gt {               %% \r\n will give us a 0 length string so ignore it
        3 index exch           %% start_index string loop_index start_index (loop_index - start_index)
        3 index 3 1 roll       %% start_index string loop_index string start_index (loop_index - start_index)
        getinterval            %% start_index string loop_index sub_string
        4 1 roll               %% sub_string start_index string loop_index
        1 add
        3 -1 roll              %% sub_string string loop_index start_index
        pop exch               %% sub_string loop_index string %% loop_index becomes new start_index
      }{
        pop                    %% start_index string loop_index
        1 add 3 1 roll exch    %% loop_index string start_index
        pop                    %% loop_index string %% loop_index becomes new start index
      } ifelse
    }{
      pop                      %% start_index string
    } ifelse
  } for
                               %% start_index string
  dup length 2 index sub dup   %% start_index string (length - start_index) (length - start_index)
  0 gt {                       %% we have characters left %% start_index string (length - start_index)
    3 -1 roll exch             %% string start_index (length - start_index)
    getinterval                %% sub_string
  } {
    pop pop pop
  } ifelse
} bind executeonly def

% Text formatting and painting for the AcroForm field without appearance streams.
/Tform { % <MaxLen> (V) <Ff> <Q> Tform -
 clippath pathbbox 4 2 roll pop pop % MaxLen (V) Ff Q dx dy
 currentfont /ScaleMatrix .knownget { 3 get } { 1 } ifelse % MaxLen (V) Ff Q dx dy yy

currentfont /FontBBox .knownget
  not
  {
    currentfont dup /FontType get
    0 eq
    {
     /FDepVector get 0 get /FontBBox get}
    {
      pop //null % force an error
    } ifelse
  }if
  dup 1 get neg exch 3 get        % MaxLen (V) Ff Q dx dy yy desc asc

dup 0 ne { div } { pop pop 0 } ifelse                     % MaxLen (V) Ff Q dx dy yy desc/asc
  1 index mul                                               % MaxLen (V) Ff Q dx dy yy desc/asc*yy

%% Check if this is declared as a multiine text widget, and if it is
 %% check that the string has at least 2 characters, so we can split it
 %% into at least two strings....
 %% Bug #687498.pdf has a multiline text widget with an empty string (amongst
 %% many other problems with this file).
 5 index 16#1000 and 0 ne 7 index length 1 gt and{ % multiline
 %% First lets see how many lines we have, make a copy of the string
 6 index mark exch .splitstring % MaxLen (V) Ff Q dx dy yy desc/asc*yy [ () () ...
 counttomark 1 add 4 add index % MaxLen (V) Ff Q dx dy yy desc/asc*yy [ () () ... count Q
 dup 0 eq {
 pop % remove extra copy of Q
 counttomark dup 2 add 2 add index exch div % MaxLen (V) Ff Q dx dy yy desc/asc*yy [ () () ... line_height
 counttomark 1 add 1 roll % MaxLen (V) Ff Q dx dy yy desc/asc*yy line_height [ () () ...
 2 0 moveto % start at bottom left of rect
 counttomark 1 1 3 -1 roll { % for every string
 pop gsave
 <EFBBBF> anchorsearch {
 pop
 } {
 <FEFF> anchorsearch {
 pop
 } if
 } ifelse
 Show grestore % pop loop counter, show string (saving current point)
 counttomark 1 add index 0 exch rmoveto % get line height, move that amount vertically.
 } for
 pop pop
 }{
 1 eq {
 counttomark dup 2 add 2 add index exch div % MaxLen (V) Ff Q dx dy yy desc/asc*yy [ () () ... line_height
 counttomark 1 add 1 roll % MaxLen (V) Ff Q dx dy yy desc/asc*yy line_height [ () () ...
 2 0 moveto % start at bottom left of rect
 counttomark 1 1 3 -1 roll { % for every string
 pop gsave % pop loop counter
 <EFBBBF> anchorsearch {
 pop
 } {
 <FEFF> anchorsearch {
 pop
 } if
 } ifelse
 dup stringwidth pop counttomark 5 add index % get rectangle width
 exch sub 2 div 0 rmoveto % subtract width of string, divide by 2 move that amount
 Show grestore % show string
 counttomark 1 add index 0 exch rmoveto % get line height, move that amount vertically.
 } for
 pop pop
 }{
 counttomark dup 2 add 2 add index exch div % MaxLen (V) Ff Q dx dy yy desc/asc*yy [ () () ... line_height
 counttomark 1 add 1 roll % MaxLen (V) Ff Q dx dy yy desc/asc*yy line_height [ () () ...
 2 0 moveto % start at bottom left of rect
 counttomark 1 1 3 -1 roll { % for every string
 pop gsave % pop loop counter
 <EFBBBF> anchorsearch {
 pop
 } {
 <FEFF> anchorsearch {
 pop
 } if
 } ifelse
 dup stringwidth pop counttomark 5 add index % get rectangle width
 exch sub 2 sub 0 rmoveto % subtract width of string,move that amount
 Show grestore % show string
 counttomark 1 add index 0 exch rmoveto % get line height, move that amount vertically.
 } for
 pop pop
 }ifelse
 }ifelse
 8 { pop } repeat
 } {
 5 index 16#1000000 and 0 ne { % comb
 8 { pop } repeat (Combed form fields are not yet implemented.) =
 } { % plain text
 3 1 roll sub add 2 div % MaxLen (V) Ff Q dx (dy-yy+desc)/2
 0 exch moveto % MaxLen (V) Ff Q dx
 1 index 0 ne {
 3 index
 <EFBBBF> anchorsearch {
 pop
 } {
 <FEFF> anchorsearch {
 pop
 } if
 } ifelse
 stringwidth pop % MaxLen (V) Ff Q dx w
 sub exch 1 eq { 2 div } { 2 sub } ifelse % MaxLen (V) Ff (dx-w)/2
 0 rmoveto % MaxLen (V) Ff
 pop % MaxLen (V)
 } {
 pop pop pop % MaxLen (V)
 2 0 rmoveto
 } ifelse
 exch pop
 <EFBBBF> anchorsearch {
 pop
 } {
 <FEFF> anchorsearch {
 pop
 } if
 } ifelse
 Show % -
 } ifelse
 } ifelse
} bind executeonly def

end readonly put		% GS_PDF_ProcSet

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