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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 /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 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 <<font>> -- {self} ?horz ?nonhv 2 copy //?FontMatrixNonHV exec { % check the font's own FontMatrix pop pop //true } { % look for descendents/ components pop % {self} ?horz <<font>> 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 { % <font> <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 % <font> <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 { % <font> <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 { % <font> <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 { % <font> <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 { % <font> <Encoding|null> <Metrics|null> <GlyphMap|null> % .updatefont <font'> <copied> 4 2 roll % <Metrics|null> <GlyphMap> <font> <Encoding|null> .updatefontencoding % <Metrics|null> <GlyphMap> <font> bool 4 1 roll exch % bool <Metrics|null> <font> <GlyphMap> .update_charstring % bool <Metrics|null> <font> bool 3 1 roll exch % bool bool <font> <Metrics|null> .updatefontmetrics % bool bool <font> bool 4 2 roll or or % <font> 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 .setglobal
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