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Edit File: pdf_main.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. % % pdf_main.ps % PDF file- and page-level operations. /.setlanguagelevel where { pop 2 .setlanguagelevel } if .currentglobal //true .setglobal pdfdict begin /GS_PDF_ProcSet dup load def % keep in pdfdict to hide it userdict /GS_PDF_ProcSet undef % Patch in an obsolete variable used by some third-party software. /#? //false def % Test whether the current output device handles pdfmark. /.writepdfmarkdict 1 dict dup /pdfmark //null put readonly def /.writepdfmarks { % - .writepdfmarks <bool> currentdevice //.writepdfmarkdict .getdeviceparams mark eq { //false } { pop pop //true } ifelse systemdict /DOPDFMARKS known or } bind executeonly def % For simplicity, we use a single interpretation dictionary for all % PDF graphics execution, even though this is too liberal. /pdfopdict mark objopdict { } forall drawopdict { } forall /endstream { exit } bind executeonly (%%EOF) cvn { exit } bind executeonly % for filters /obj { ( **** Error: Content stream is not terminated by 'endstream'.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } bind executeonly % PDF 1.1 operators /BX { /BXlevel BXlevel 1 add store } bind executeonly /EX { /BXlevel BXlevel 1 sub store } bind executeonly /PS { cvx exec } bind executeonly % PDF 1.2 operators /BMC { /BMClevel BMClevel 1 add store pop } bind executeonly /BDC { /BMClevel BMClevel 1 add store exch /OC eq { dup type /nametype eq { PDFfile fileposition exch % pos /Name Page /Properties rget { ocg-is-visible not { OFFlevels BMClevel dup put } if } if PDFfile exch setfileposition } { pop } ifelse } { pop } ifelse } bind executeonly /EMC { OFFlevels BMClevel 2 copy known { 2 copy undef } if 1 sub /BMClevel exch store pop } bind executeonly /MP { pop } bind /DP { pop pop } bind /- { 0 % Bug 690016 ( **** Error: Invalid operator '-' is assumed to be the number 0.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } bind executeonly /Recursive_XObject_D 1 dict def .dicttomark readonly def % This dictionaty encapsulates all that is needed to generate pagelabel pdfmarks. % % This is provided by Leon Bottou for the benefit of the djvudigital device % which is a device developed and maintained outside of Artifex, and which is % not a contributed device. % % This device does not cope with the method used by pdfwrite to pass the pagelabels % number tree as a 'blob' of data, but requires that the page labels be passed using % a PAGELABEL pdfmark. % % We don't want to do that with pdfwrite because there is no mechanism in pdfmark syntax % to pass a tree, which means we'd have to laboriously disassemble the pdfmarks for the % page labels and rebuild a number tree for it. This would mean pattern matching each % string passed via PAGELABEL to see if it could be defined as a continuation % of the preceding string, uing prefixes. Its much easier for us just to pass the tree. % % Note that this code simply translates the PageLabels Number tree into a number of % individual PAGELABEL pdfmarks, if used for pdfwrite this would result in a number % tree which consists solely of leaf nodes, where each node has a string for its label. % This can be considerably more verbose than the shorthand possible with a Page Label % dictionary. % /pagelabeldict mark % (TEXT) .toLower (text) /.toLower { dup length 1 sub -1 0 { 1 index exch 2 copy get 2#00100000 or put } for } bind executeonly % int .cvAlpha (int in alphabetic base 26) /.cvAlpha { [ exch % construct an array of ASCII values, in reverse { % the remainder stays on the top of stack dup 0 eq { pop exit } if % quit if the value is zero dup 26 mod dup 0 eq { 26 add } if % so that the division is correct dup 64 add 3 1 roll sub 26 idiv % save the ASCII value and iterate } loop ] dup length dup string 3 1 roll dup -1 1 { % put the letters in a string 4 copy sub exch 4 -1 roll 1 sub get put } for pop pop } bind executeonly % int .cvRoman (int in capital Roman numerals) % convert a positive integer to capital Roman numerals % return a decimal string if >= 4000 /.cvRoman { dup 255 string cvs % start with the decimal representation exch 4000 lt { % convert only if Roman numerals can represent this dup length [ [ () (I) (II) (III) (IV) (V) (VI) (VII) (VIII) (IX) ] [ () (X) (XX) (XXX) (XL) (L) (LX) (LXX) (LXXX) (XC) ] [ () (C) (CC) (CCC) (CD) (D) (DC) (DCC) (DCCC) (CM) ] [ () (M) (MM) (MMM) ] ] % Roman equivalents () % append the Roman equivalent of each decimal digit to this string 2 index -1 1 { 2 index 1 index 1 sub get 5 index 5 index 4 -1 roll sub get 48 sub get concatstrings } for 4 1 roll pop pop pop } if } bind executeonly % style printers /PageStyle << /D { 255 string cvs } bind executeonly /R { .cvRoman } executeonly /r { .cvRoman .toLower } executeonly /A { .cvAlpha } executeonly /a { .cvAlpha .toLower } executeonly >> % check whether we want to generate pdfmarks /wantpagelabelmarks { % WantsPageLabels means that pagelabels will be passed % using .pdfpagelabels and not using pdfmarks /WantsPageLabels /GetDeviceParam .special_op {pop pop //false}{//true} ifelse %% This is truly ugly..... %% GSView 5 redefines pdfmark and processes it itself. However if it gets %% a pdfmark it cannot cope with, it simply fails. Its not prepared to cope %% with PAGELABEL pdfmarks, so we don't want to send it to them. There's no %% way for us to fix GSView 5, its long out of any kind of support, but we do %% try not to break it. We happen to know that GSView 5 installs a GSview %% dictionary in userdict, so this test simply ensures we don't emit PAGELABEL %% pdfmarks if that dictioanry is present. userdict /GSview known {pop //false} if } bind executeonly % generate pagelabel pdfmark /dopagelabel { % -- dopagelabel -- << /S //null /P () /O 0 >> begin wantpagelabelmarks { Trailer /Root knownoget { oforce /PageLabels knownoget { oforce Page# 1 sub numogetle { oforce dup /S knownoget not { //false } if /S exch def dup /P knownoget not { 0 string } if /P exch def /St knownoget not { 1 } if exch sub /O exch def } if P Page# 1 sub O add PageStyle S knownoget { exec concatstrings } if mark /Label 3 -1 roll /PAGELABEL pdfmark } if } if } if end } bind executeonly .dicttomark readonly def % ======================== Main program ======================== % end % pdfdict userdict begin /defaultfontname /Times-Roman def % Make sure the registered encodings are loaded, so we don't run the risk % that some of the indices for their names will overflow the packed % representation. (Yes, this is a hack.) SymbolEncoding pop DingbatsEncoding pop % Redefine 'run' so it recognizes PDF files. systemdict begin /.runps /run load def /run { dup type /filetype ne { (r) file } if % skip leading whitespace characters (actually anything less than or equal to <sp>) { dup ( ) .peekstring not { //false exit } if dup 0 get 32 le { pop dup read pop pop } { //true exit } ifelse } loop exch pop { % Appletalk PAP sends short strings with %! header expecting a response. % 'gv' swallows the %!PS line, then sends DSC comments beginning with %% % and also waits for a response. The following avoids those hangs. dup 2 string .peekstring pop dup (%!) eq exch (%%) eq or { cvx .runps } { dup 1023 string .peekstring pop % "1024 string" exceeds current %stdin buffer % Valid PDF file cannot be smaller than 400 bytes. (%PDF-) search { 3 1 roll pop pop dup (%!PS) search not { length 0 ne { 1 index exch readstring pop pop (%stderr) (w) file dup ( **** Warning: File has some garbage before %PDF- .\n) writestring flushfile } { pop } ifelse dup (%stdin) (r) file eq { % Copy PDF from stdin to temporary file then run it. //null (w+) /.tempfile .systemvar exec exch 3 1 roll % stack: tempname stdin tempfile 64000 string { % stack: tempname stdin tempfile string 2 index 1 index readstring exch 3 index exch writestring not { exit } if } loop pop exch closefile % stack: tempname tempfile dup 0 setfileposition dup runpdf closefile deletefile } { runpdf } ifelse } { pop pop pop pop cvx .runps % (%!PS) found first } ifelse } { pop cvx .runps % (%PDF-) not found } ifelse } ifelse } { closefile % file was empty } ifelse } bind odef currentdict /runpdfstring .undef /runpdfbegin { % <file> runpdfbegin - userdict begin % It turns out that the PDF interpreter uses memory more % effectively if it is run under at least one level of save. % This is counter-intuitive, and we don't understand why it happens, % but the improvement is significant. /PDFTopSave save def <</ProcessDSCComment //null>> setuserparams <</ProcessComment //null>> setuserparams %% Bug #696487, allow dict stack to grow without limit, as these PDF %% files have stupidly deep gsave nesting and we need a dictionary per gsave %% at the moment. %% Remove ths if bug #696511 is ever completed (move ExtGstate parameters into gstate) <</MaxDictStack -1>> setuserparams %% Bug #696567, same customer as above. Ths time they have a file with a page whch has %% 447000 ExtGState references (all of hwch contain no gstate!) Because we allocate %% these on the stack, allow the stack to grow indefinitely in order to accomodate %% such stupid files. Also move these lines from the end of the routine, so that %% the increases are in place before we call odfopen, which will build the %% resources and needs this definition in place. <</MaxOpStack -1>> setuserparams 0 setobjectformat /Page# //null def /Page //null def /DSCPageCount 0 def /PDFSave //null def //pdfdict /GS_PDF_ProcSet get begin //pdfdict begin pdfopen begin /CumulativePageCount currentpagedevice /PageCount get def } bind executeonly def /runpdfpagerange { % - runpdfpagerange <firstpage#> <lastpage#> <</DisablePageHandler //true>> setpagedevice /PortfolioPage where { pop PortfolioPage cvi dup pdfpagecount add % a b+1 /PortfolioPage dup load % a b+1 /P () ( ) 1 index copy pop dup 3 index exch cvs pop % a b+1 /P (b+1) store 1 sub % a b /FirstPage where { pop FirstPage <</DisablePageHandler //true>> setpagedevice} { 1 } ifelse /LastPage where { pop LastPage <</DisablePageHandler //true>> setpagedevice} {2000000000} ifelse % a b fp lp 2 index 2 index lt { % b < fp 1e10 } { 3 index 2 index gt { % a > fp 1 } { 1 index 4 index sub 1 add } ifelse } ifelse % a b fp lp f 3 index 2 index lt { % b < bp 3 index 5 index sub 1 add % b-a+1=count } { 4 index 2 index gt { 0 } { 1 index 5 index sub 1 add } ifelse } ifelse % a b fp lp f l 6 2 roll pop pop pop pop QUIET not { 1 index 1 index gt { (Skipping the subfile.) = flush } { (Processing pages ) print 1 index =only ( through ) print dup =only (.) = flush } ifelse } if } { /PageList where { pop PageList (even) anchorsearch { pop length 0 gt { /runpdfpagerange /syntaxerror cvx signalerror } if /PDFPageList pdfpagecount 1 add array def 2 2 pdfpagecount { PDFPageList exch 1 put } for 1 pdfpagecount QUIET not { (Processing even-numbered pages\n) print (.) = flush } if } { (odd) anchorsearch { pop length 0 gt { /runpdfpagerange /syntaxerror cvx signalerror } if /PDFPageList pdfpagecount 1 add array def 1 2 pdfpagecount { PDFPageList exch 1 put } for 1 pdfpagecount QUIET not { (Processing odd-numbered pages\n) print 1 index =only ( through ) print dup =only (.) = flush } if } { %% validate string contents, check for digit comma or minus dup { dup 44 eq not { dup 45 eq not { dup 48 lt 1 index 57 gt or { /runpdfpagerange /syntaxerror cvx signalerror } if } if } if pop } forall <</DisablePageHandler //true>> setpagedevice /PDFPageList pdfpagecount 1 add array def { (,) search { %% We now have (post) (,) (pre) exch pop %% get rid of the (,), leave the (post) as the string for the next iteration, deal with the section up to the comma (-) search { %% Now we have (end) (-) (start) exch pop %% get rid of the minus (end) (start) 0 exch {48 sub exch 10 mul add} forall %% Make sure the start of the range is inside the number of available pages dup pdfpagecount le { exch %% deal with a trailing '-' by replacing it with the number of pages in the file dup length 0 eq { pop pdfpagecount }{ 0 exch {48 sub exch 10 mul add} forall } ifelse 1 exch %% start 1 end %% Make sure the end of the range is inside the number of available pages dup pdfpagecount gt {pop pdfpagecount} if {PDFPageList exch 1 put} for } { %% start of range invalid, drop this range. pop pop }ifelse }{ %% no minus signs, must be a simple page number 0 exch {48 sub exch 10 mul add} forall %% ensure its in the valid range of pages dup pdfpagecount le { PDFPageList exch 1 put } { pop } ifelse } ifelse }{ %% no commas separating pages, just the original string (), deal with its as a section, then exit the loop (-) search { %% Now we have (end) (-) (start) exch pop %% get rid of the minus (end) (start) 0 exch {48 sub exch 10 mul add} forall %% Make sure the start of the range is inside the number of available pages dup pdfpagecount le { exch %% deal with a trailing '-' by replacing it with the number of pages in the file dup length 0 eq { pop pdfpagecount }{ 0 exch {48 sub exch 10 mul add} forall } ifelse 1 exch %% start 1 end %% Make sure the end of the range is inside the number of available pages dup pdfpagecount gt {pop pdfpagecount} if {PDFPageList exch 1 put} for } { %% start of range invalid, drop this range. pop pop }ifelse }{ %% no minus signs, must be a simple page number 0 exch {48 sub exch 10 mul add} forall %% ensure its in the valid range of pages dup pdfpagecount le { PDFPageList exch 1 put } { pop } ifelse } ifelse exit %% done all the sections. } ifelse } loop QUIET not { (Processing pages ) print PageList =only (.) = flush } if } ifelse } ifelse 1 pdfpagecount }{ /FirstPage where { <</DisablePageHandler //true>> setpagedevice pop FirstPage dup pdfpagecount gt { (\nRequested FirstPage is greater than the number of pages in the file: ) print pdfpagecount = flush } if } { 1 } ifelse /LastPage where {<</DisablePageHandler //true>> setpagedevice pop LastPage pdfpagecount .min } { pdfpagecount } ifelse 1 index 1 index gt { ( No pages will be processed \(FirstPage > LastPage\).) = flush } { QUIET not { (Processing pages ) print 1 index =only ( through ) print dup =only (.) = flush } if } ifelse } ifelse }ifelse } bind executeonly def /dopdfpages { % firstpage# lastpage# dopdfpages - << /PDFScanRules //true >> setuserparams % set scanning rules for PDF vs. PS << /RenderTTNotdef systemdict /RENDERTTNOTDEF get >> setuserparams % Should we render TT /.notdef 1 exch { %% If we have a array of pages to render, use it. /PDFPageList where { pop dup PDFPageList exch get 1 eq } {//true} ifelse { dup /Page# exch store QUIET not { (Page ) print dup //== exec flush } if pdfgetpage pdfshowpage }{ pop }ifelse } for % Indicate that the number of spot colors is unknown in case the next page % imaged is a PS file. currentpagedevice /PageSpotColors known { << /PageSpotColors -1 >> setpagedevice } if << /PDFScanRules //null >> setuserparams % restore scanning rules for PS } bind executeonly def /runpdfend { RepairedAnError { printrepairederror } { Repaired { printrepaired } if } ifelse currentdict pdfclose end % temporary dict end % pdfdict end % GS_PDF_ProcSet PDFTopSave restore end % userdict 2 vmreclaim % couldn't hurt } bind executeonly def % Copy stream to an external temporary file and % return the file name as PS name. /copy_embedded_file { //true resolvestream % strm dup 1023 string .peekstring pop % "1024 string" exceeds current %stdin buffer dup length 400 ge { % Valid PDF file cannot be smaller than 400 bytes. (%PDF-) search { pop pop pop //true } { pop //false } ifelse } { pop //false } ifelse { //null (w) /.tempfile % strm (name) null (w) /.tempfile .systemvar exec % strm (name) file 3 -1 roll % (name) file strm 32768 string % (name) file strm (buf) { 3 copy readstring % (name) file strm (buf) file (data) bool 3 1 roll % (name) file strm (buf) bool file (data) writestring % (name) file strm (buf) bool not { exit } if } loop pop closefile % (name) file closefile % (name) cvn % /name } { closefile } ifelse } bind executeonly def % Recursively enumerate /Names entries % <node> pdf_collection_names /temp_file_name ... /pdf_collection_names { dup /Names knownoget { exch pop { oforce dup type /dicttype eq { /EF knownoget { /F knownoget { copy_embedded_file } if } if } { pop } ifelse } forall } { /Kids knownoget { { oforce dup //null ne { pdf_collection_names } { pop } ifelse } forall } if } ifelse } bind executeonly def % Copy selected subfiles to temporary files and return the file names % as a PostScript names to protect them from restore. % Currently, all PDF files in the Portfolio are extracted and returned. % % - pdf_collection_files [ /temp_file_name ... /temp_file_name /pdf_collection_files { mark Trailer /Root knownoget { dup /Collection oknown { /Names knownoget { /EmbeddedFiles knownoget { pdf_collection_names } if } if } { pop } ifelse } if } bind executeonly def /runpdf { % <file> runpdf - %% Get the PDF filename (it *must* be a file even if it came from stdin it gets %% copied to a temporary file) and store it in pdfdict. We will use this for %% hashing fonts to detect if fonts with the same name are from different files. %% dup currentglobal exch //true setglobal .getfilename exch setglobal /InputPDFFileName exch //pdfdict 3 1 roll .forceput //runpdfbegin exec //pdf_collection_files exec dup mark eq { pop process_trailer_attrs //runpdfpagerange exec //dopdfpages exec //runpdfend exec } { //runpdfend exec ] (1 ) 10 string copy exch { dup type /filetype eq { //runpdfbegin exec dup /PortfolioPage exch def process_trailer_attrs //runpdfpagerange exec //dopdfpages exec //runpdfend exec closefile } { .namestring dup (r) file //runpdfbegin exec /PortfolioPage 2 index def process_trailer_attrs //runpdfpagerange exec //dopdfpages exec //runpdfend exec deletefile } ifelse } forall pop } ifelse } bind executeonly odef currentdict /pdf_collection_files .undef end % systemdict % Redefine the procedure that the C code uses for running piped input. % It is OK to use { (%stdin) run } here, because a startjob cannot occur. /.runstdin { { (%stdin) run } execute0 } bind executeonly def end % userdict pdfdict begin % ======================== File parsing ======================== % % Read the cross-reference and trailer sections. % I believe the definitions here are only used when parsing the trailer % dictionary and cross-reference table. So, following on from bug 697351 % we will validate the operands to /R here, because the trailer and xref % are comparatively small. Note that the bug does not expose a problem % here, but we probably ought to validate the operands. Of course, if % they are invalid, the PDF file is probably unreadable anyway. /traileropdict mark (<<) cvn { /dictlevelcount dictlevelcount 1 add store mark } bind executeonly (>>) cvn { { .dicttomark } stopped { ( **** Warning: File has unbalanced >> in trailer.\n) pdfformatwarning } if /dictlevelcount dictlevelcount 1 sub def dictlevelcount 0 eq { exit } if } bind executeonly ([) cvn { mark } bind executeonly % ditto (]) cvn dup load % /true true % see .pdfexectoken in pdf_base.ps % /false false % ibid. % /null null % ibid. /R { 1 index type /integertype eq 1 index type /integertype eq and { /resolveR cvx 3 packedarray cvx } { ( **** Error: indirect object reference \(R\) encountered with invalid arguments.) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } ifelse } bind executeonly % see Objects below .dicttomark readonly def % After reading entry count: skip whitespace, exit on a digit % (presumably the object offset, otherwise throw /syntaxerror /xref-char-dict << 0 {} % \000 9 1 index % \t 10 1 index % \r 12 1 index % \f 13 1 index % \n 32 1 index % ' ' 48 { exit } bind % '0' 49 1 index % '1' 50 1 index % '2' 51 1 index % '3' 52 1 index % '4' 53 1 index % '5' 54 1 index % '6' 55 1 index % '7' 56 1 index % '8' 57 1 index % '9' 116 { % 't'railer PDFfile 7 string .peekstring not { () } if dup /trailer eq { % Empty xref section pop exit } { ( **** Warning: Invalid string \() exch concatstrings (\) follows xref section header.\n) concatstrings pdfformatwarning /setxrefentry cvx /syntaxerror signalerror } ifelse } bind >> readonly def % Read original version (pre PDF 1.5) of the xref table. % Note: The position is the location of 'xref'. The current PDFfile % position is just after the 'XREF'. /readorigxref % <pos> readorigxref <trailerdict> { pop % We do not need the position. % First we search this (and any Previous) trailers, looking for % the /Size of the xref. We use ths to initialise our storage % of xref and similar objects. This avoids us havign to continually % resize these objescts which is very wasteful, and leads to us % spending much time in memory amanagement. % Bug #696454 PDFfile fileposition /dictlevelcount 0 def /TrailerSizeError //false def /TrailerSize 0 def { % Throw away the 'xref' data up to the trailer dictionary PDFfile 0 (trailer) /SubFileDecode filter flushfile % Now read the trailer dictionary PDFfile traileropdict .pdfrun dup /Size known { % If we have a /Size then use it and exit this loop /Size get /TrailerSize exch def exit }{ dup /Prev known { % We don't have a Size, but we have a Previous, set up to read it. /Prev get PDFfile exch setfileposition }{ % No size and no Prev with a Size. Fall back to resizing the xref as we go. pop (*** Warning: No trailer dictionary with a Size detected, xref processing will be dynamic and slower) pdfformatwarning /TrailerDict 0 def exit } ifelse }ifelse }loop % Initialise the objects with the detected Size. TrailerSize growPDFobjects PDFfile exch setfileposition 0 % Initialize xref table error counter //false % Have we seen at least one section entry in this xref ? Bug #694342 { PDFfile token pop % first object # or trailer dup /trailer eq { %% check to see if we have seen at least an empty section for this xref pop {exit} { %% we have not seen any section entries in an xref, not even an empty section (xref 0 0) %% Bug 694342, treat this as an error and rebuild the xref. /setxrefentry cvx /syntaxerror signalerror } ifelse } { %% remove the boolean telling us if we have a section or not, leaving the first object number exch pop } ifelse PDFfile token pop % entry count % remaining must be whitespace only (otherwise this xref Size was invalid. { PDFfile (0) .peekstring not { pop exit } if 0 get //xref-char-dict exch .knownget { exec } { ( **** Warning: xref subsection header has extra characters.\n) pdfformatwarning /setxrefentry cvx /syntaxerror signalerror } ifelse PDFfile read { pop } { exit } ifelse } loop % This section might be adding new objects: % ensure that Objects and Generations are big enough. % stack: <err count> <first obj> <entry count> 2 copy add TrailerSize gt { TrailerSizeError not { /TrailerSizeError //true def PDFSTOPONERROR not { (**** Warning: Discovered more entries in xref than declared in trailer /Size\n) pdfformatwarning } { /readorigxref cvx /rangecheckerror signalerror } ifelse } if % We now know that the /Size was wrong. We could read the whole table % resizing on every section, but if there are a lot of sections we % end up spending lots of time in memory management (Bug #696454) so % instead add 64k to the first object number in the section. This will % waste some memory, but is faster in ths case. 1 index 65534 add dup /TrailerSize exch def growPDFobjects } if { % stack: <err count> <obj num> % Read xref line PDFfile 20 string readstring pop % always read 20 chars. token pop % object position exch token pop % generation # exch token pop % n or f exch % stack: <err count> <obj#> <loc> <gen#> <tag> <remainder of line> % check to make sure trailing garbage is just white space //false 1 index { 32 gt or } forall { 6 -1 roll 1 add 6 1 roll % bump error count on garbage dup (\n) search { exch pop exch pop } { (\r) search { exch pop exch pop } if } ifelse length PDFfile fileposition exch sub PDFfile exch setfileposition } if pop % Stack: <err count> <obj#> <loc> <gen#> <tag> dup /n eq { % xref line tag is /n pop % pop dup of line tag 1 index 0 eq { ( **** Warning: considering '0000000000 XXXXX n' as a free entry.\n) pdfformatwarning } { 0 3 1 roll % Set ObjectStream object number = 0 //false setxrefentry % Save xref entry, don't change existing entries 3 -1 roll pop % Remove ObjectStream object onumber } ifelse } { % xref line tag was not /n /f ne % verify that the tag was /f { /setxrefentry cvx /syntaxerror signalerror } if } ifelse pop pop % pop <obj location> and <gen num> % stack: <err count> <obj num> 1 add % increment object number } repeat pop % pop <obj #> //true % We have seen at least one entry in an xref section Bug #694342 } loop 0 ne { ( **** Warning: length of some xref entries is not equal to 20 bytes.\n) pdfformatwarning } if PDFfile traileropdict .pdfrun } bind executeonly def currentdict /xref-char-dict undef % This dicitonary is used to read the xref dictionary. It should work for % reading any dictionary. dictlevelcount must contain 0. /xrefopdict mark (<<) cvn { /dictlevelcount dictlevelcount 1 add def mark } bind executeonly (>>) cvn { .dicttomark /dictlevelcount dictlevelcount 1 sub def dictlevelcount 0 eq { exit} if } bind executeonly ([) cvn { mark } bind executeonly % ditto (]) cvn dup load % /true true % see .pdfexectoken in pdf_base.ps % /false false % ibid. % /null null % ibid. /R { /resolveR cvx 3 packedarray cvx } bind executeonly % see Objects below .dicttomark readonly def % Get a variable length positive integer value from a stream. A value % of zero is returned if the count is zero. /getintn { % <stream> <count> getintn int 0 exch { 256 mul 1 index read pop add } repeat exch pop % Discard stream } bind executeonly def % This array contains handlers for processing the different types of % entries in the XRef stream. % Stack: <Xrefdict> <xref stream> <Index array> <pair loc> <obj num> % <field 2> <field 3> % The handlers leave the stack unchanged. /xref15entryhandlers [ { % XRef entry type 0 - free or f type xref entry % (free ) print % (obj num: ) print 2 index pdfstring cvs print ( ) print % (loc: ) print 1 index pdfstring cvs print ( ) print % (gen: ) print dup === flush } bind executeonly % Do nothing for free xref entries % XRef entry type 1 - normal or n type xref entry { % field 2 = obj loc, field 3 = gen num % (normal ) print % (obj num: ) print 2 index pdfstring cvs print ( ) print % (loc: ) print 1 index pdfstring cvs print ( ) print % (gen: ) print dup === flush 0 3 1 roll % set stream number = 0 //false setxrefentry 3 -1 roll pop % remove stream number } bind executeonly % XRef entry type 2 - compressed object type xref entry { % field 2 = object stream num, field 3 = index into object stream % (Compressed objects: ) print % (obj num: ) print 2 index pdfstring cvs print ( ) print % (field 2: ) print 1 index pdfstring cvs print ( ) print % (field 3: ) print dup === flush 0 //false setxrefentry pop % set generation number = 0 } bind executeonly ] def % Read the PDF 1.5 version of the xref table. % Note: The position is the location of the start of the dictionary object % In PDF 1.5, the XRef dictionary also serves as the trailer dictionary /readpdf15xref % <pos> readpdf15xref <trailerdict> { /Classic-xref //false store PDFfile exch setfileposition % move to start of object % Get object number, revision, and 'obj' and discard //false PDFfile token { type /integertype eq { PDFfile token { type /integertype eq { PDFfile token { /obj eq or } if } if } if } if } if not { /readpdf15xref cvx /syntaxerror signalerror } if % Get the XRef dicitionary /dictlevelcount 0 def PDFfile xrefopdict .pdfrun % Verify that we have an XRef dictionary dup /Type get /XRef ne { /readpdf15xref cvx /syntaxerror signalerror } if % Ensure that we we have room in the objects array, etc. dup /Size get 1 index /Index .knownget { %% if we have a /Index, remember to add the starting index on to the size dup 0 get 3 -1 roll add exch %% Get the staring index and number of entries from the Index array %% add them, and see if the result is larger than the starting index plus %% Size entry (yes they are *supposed* to be consistent.....) %% Bug #696365 dup 0 get exch 1 get add 2 copy gt { pop }{ exch pop } ifelse } if growPDFobjects % Create a stream for the XRef data PDFfile token pop pop % Skip over 'stream' dup stream //false resolvestream % Stack: <XRefdict> <xref stream> % The Index array defines the ranges of object numbers in the % XRef stream. Each value pair is consists of starting object % number and the count of consecutive objects. % Get the Index array, if present 1 index /Index .knownget not { % If no Index array ... [ 0 3 index /Size get ] % Default = [ 0 Size ] } if % Loop through the Index array 0 2 2 index length 1 sub { % Get start and end of object range 2 copy get % Start of the range dup 3 index 3 index 1 add get % Number of entries in range % Loop through the range of object numbers add 1 sub 1 exch { % Form end of range, set increment = 1 % Stack: <Xrefdict> <xref stream> <Index array> <pair loc> <obj num> % Get xref parameters. Note: The number of bytes for each parameter % is defined by the entries in the W array. 4 index /W get aload pop % Get W array values % The first field indicates type of entry. Get first field value. % If the num. of bytes for field 1 is 0 then default field value is 1 3 -1 roll dup 0 eq { pop 1 } { 6 index exch getintn } ifelse % Get the handler for the xref entry type. We will execute the % handler after we get the other two field values. xref15entryhandlers exch get 3 -1 roll 6 index exch getintn % Get second field 3 -1 roll 6 index exch getintn % Get third field 3 -1 roll exec % Execute Xref entry handler pop pop pop % Remove field values and obj num } for % Loop through Xref entries pop % Remove Index array pair loc } for % Loop through Index array entries pop pop % Remove Index array and xref stream } bind executeonly def % Read the cross-reference table. % <pos> is the position either from the startxref statement or the /Prev % entry in the prior trailer dictionary. /readxref % <pos> readxref <trailerdict> { PDFoffset add PDFfile exch % Check that the given location is within the file. dup PDFfilelen gt { ( **** Warning: Specified xref location is beyond end of file.\n) pdfformatwarning /readxref cvx /invalidaccess signalerror } if setfileposition % In some PDF files, this position actually points to % white space before the xref line. Skip over this here. { PDFfile fileposition PDFfile read pop 32 gt { exit } if pop } loop dup % Make copy of the file position (before last char was read). PDFfile exch setfileposition % The PDF specification says that the 'xref' must be on a line % by itself. The code here formerly used readline and linene to % check this. However, Acrobat Reader only requires the line to % begin with 'xref', and there are enough applications producing % non-compliant PDF files that we have to do this too. PDFfile pdfstring 0 4 getinterval readstring pop (xref) eq { readorigxref % 'xref' -> original xref table % if hybrid-reference PDF, also fetch the entries % found in the XRef stream pointed by /XRefStm dup /XRefStm knownoget { %% Bug #695883 the test file has an XRefStm which points beyond the end of the file. %% We check that here and simply fall back to thje classic xref if this error occurs. dup PDFfilelen lt{ PDFSTOPONERROR not { mark exch {readpdf15xref pop} stopped { ( **** Error: This hybrid file's XRefStm does not point to a valid stream.\n Ignoring error, output may be incorrect.\n) pdfformaterror } if cleartomark } { readpdf15xref pop } ifelse } { ( **** Error: This hybrid file's XRefStm points beyond the end of file.\n Ignoring error, output may be incorrect.\n) pdfformaterror pop }ifelse } if } { readpdf15xref } % otherwise assume PDF 1.5 xref stream ifelse } bind executeonly def % Open a PDF file and read the header, trailer, and cross-reference. /pdfopen { % <file> pdfopen <dict> % Color space substitution in PDF is handled somewhat differently % than in PostScript. A given device color space will be substituted % if the corresponding "Default..." entry exists in the Page's % Resource dictionary (which might be inhereted); there is no % UseCIEColor to enable/disable color mapping. % % This behavior is achieved by always setting UseCIEColor to true % in the page device dictionary. If the value of this parameter was % originally false (i.e.: the output device does not perform color % space substitution by default), the instances DefaultGray, % DefaultRGB, and DefaultCMYK of the (local) ColorSpace category % are redefined to be DeviceGray, DeviceRGB, and DeviceCMYK, % respectively. This is not done if UseCIEColor is true by default, % as in that case color substitution is presumably desired even % if the file does not request it. currentpagedevice /UseCIEColor .knownget dup { pop } if not { .currentglobal //false .setglobal /DefaultGray { /DeviceGray } cvlit /ColorSpace defineresource pop /DefaultRGB { /DeviceRGB } cvlit /ColorSpace defineresource pop /DefaultCMYK { /DeviceCMYK } cvlit /ColorSpace defineresource pop .setglobal } if pdfopenfile begin pdfopencache currentdict end } bind executeonly def /process_trailer_attrs { % - process_trailer_attrs - writeoutputintents .writepdfmarks { % Copy bookmarks (outline) to the output. Trailer /Root knownoget { /Outlines knownoget { /NO_PDFMARK_OUTLINES where {pop NO_PDFMARK_OUTLINES not}{//true}ifelse { dup /First known { 100 dict exch %% dictionary for detecting circular references /First get dup type /packedarraytype eq { %% << >> {} or << >> dup 0 get dup %% << >> {} object_num object_num 3 index 3 1 roll %% << >> {} << >> object_num object_num put oforce } if dup type /dicttype eq { { dup /Next known { dup /Next get %% << >> <</Next...>> {} or << >> dup type /packedarraytype eq { dup 0 get %% << >> <</Next....>> {} object_num dup 4 index exch known { (\n **** ERROR: Circular reference detected in Outlines,\n) pdfformaterror ( terminating Outline processing.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror %% << >> <</Next....>> {} object_num pop pop dup /Next undef %% << >> <<.....>> writeoutline exit } if %% << >> <</Next....>> {} object_num dup 3 index 3 1 roll put %% << >> <</Next....>> {} oforce } if exch writeoutline %% << >> </Next object> dup type /dicttype eq not {pop exit} if } { writeoutline exit }ifelse } loop pop } {pop pop} ifelse }{ pop }ifelse } { pop }ifelse } if } if count /pdfemptycount exch def Trailer /Info {knownoget} stopped { ( **** Error: Unable to read Info dictionary from Trailer, Info will not be preserved.\n) pdfformaterror count pdfemptycount sub {pop} repeat /emitProducer where {/emitProducer //false put} if } { { % % Bug #700820, if the Info dictionary isn't a dictionary, then don't try to use it.... % dup type /dicttype eq { mark exch { /Author /Creator /Title /Subject /Keywords % /Producer is Ghostscript; /CreationDate is now; /ModDate is also now. } { 2 copy knownoget { 3 -1 roll } { pop } ifelse } forall pop dup mark ne { {/DOCINFO pdfmark} stopped {cleartomark} if } { pop } ifelse }{ pop ( **** Error: The Info dictionary is not a dictionary, Info will not be preserved.\n) pdfformaterror count pdfemptycount sub {pop} repeat /emitProducer where {/emitProducer //false put} if } ifelse } if } ifelse } if % Initialize OC groups Trailer /Root knownoget { /OCProperties knownoget { % By default, OCGs are 'on'; mark only 'off' OCGs. % If, contrary to the spec, BaseState is OFF, mark all OCGs % and unmark ON ones. Bug 691491. dup /OCGs knownoget not { {} } if exch /D knownoget { dup /BaseState knownoget { /OFF eq } { //false } ifelse { ( **** Warning: Default viewing OC config dictionary has /BaseState /OFF\n) pdfformatwarning 1 index { oforce dup type /dicttype eq { /OFF 0 put } { pop } ifelse } forall /ON knownoget { { oforce dup type /dicttype eq { /OFF undef } { pop } ifelse } forall } if } { /OFF knownoget { { oforce dup type /dicttype eq { /OFF 0 put } { pop } ifelse } forall } if } ifelse } if pop } if } if % Enumerate all AcroForm fields and link all separate widgets % to the parent field. Trailer /Root knownoget { /AcroForm knownoget { %% If we don't have a NeedAppearances entry, treat as if true. %% We know Acrobat always regenerates all annotait dup /NeedAppearances knownoget not { //true } if { /NeedAppearances //true def dup /Fields knownoget { { oforce %% Make sure the entry from the Fields array is a dictionary %% Bug #692447.pdf has an array of nulls. dup type /dicttype eq { link_widget_annots }if pop } forall } if pop } { pop } ifelse } if } if % Use OutputIntent ICC profile systemdict /UsePDFX3Profile .knownget { dup //false eq { pop } { dup //true eq { pop 0 } if dup type /integertype eq { Trailer /Root oget /OutputIntents knownoget { dup length 2 index le % i [] bool 2 index 0 lt or { pop pop (Source file has no OutputIntent with this number.\n) } { exch oget dup type /dicttype ne { pop << >> } if /DestOutputProfile knownoget { [ /ICCBased 3 -1 roll ] ICCBased-resolve 1 get .set_outputintent () } { (This OutputputIntents dictionary has no profile.\n) } ifelse } ifelse } { pop (File has no /OutputIntents attribute\n) } ifelse } { pop (UsePDFX3Profile must be a boolean or an integer.\n) } ifelse dup () eq { pop } { ( **** ) stderrprint stderrprint } ifelse } ifelse } { % If the user told us to use a named OutputIntent systemdict /UseOutputIntent .knownget { cvn Trailer /Root oget /OutputIntents knownoget { { dup /OutputConditionIdentifier get cvn dup /Custom eq { pop dup /Info get cvn }if 2 index eq { %% Found the required OutputIntent /DestOutputProfile knownoget { [ /ICCBased 3 -1 roll ] ICCBased-resolve 1 get .set_outputintent () } if pop exit }{ pop } ifelse } forall pop }{ pop }ifelse } if }ifelse Trailer /Root knownoget { /PageLabels knownoget { %% Currenlty only the pdfwrite device can handle PageLabels %% because we deal with these using putparams, not pdfmarks %% This is because the pdfmark syntax can't handle all the %% possible page label formats in a PDF file! /WantsPageLabels /GetDeviceParam .special_op { pop pop .pdfpagelabels } { pop } ifelse } if } if } bind executeonly def % Verify that each entry in the xref table is pointing at an object with % the correct object number and generation number. /verify_xref % - verify_xref - { PDFfilelen 1 1 Objects length 1 sub % stack: filesize 1 1 <number of objects - 1> { % Check if the object is free (i.e. not used). The values in % Generations is the generation number plus 1. If the value in % Generations is zero then the object is free. % Stack: <filesize> <obj num> Generations 1 index get % Get the genration number 0 ne { % Skip if object number is free ObjectStream 1 index get % Check if object is in objectstream 0 eq { % We only check objects not in an objectstream { % Use stop context since we may get an error if object is invalid dup Objects exch get % Get the object location PDFoffset add dup 3 index ge % Compare object location to file size { pop //true } % Rebuild if location not in file { PDFfile exch setfileposition % Go to the object location //true % Stack: <filesize> <obj num> <true> PDFfile token pop % Read object number from file 2 index eq { % Verify object number PDFfile token pop % Read generation number from file Generations 3 index % Get specified generaton number get 1 sub % Gen numbs are stored with 1 added. eq { % Verify generation number PDFfile token pop /obj eq { % Verify 'obj' text pop //false % We have valid object, do not rebuild } if } if } if } ifelse } //.internalstopped exec { //true } if % If we stop then we need to rebuild % Stack: <filesize> <obj num> <need rebuild flag> { ( **** Warning: File has an invalid xref entry: ) pdfformatwarning pdfstring cvs pdfformatwarning (. Rebuilding xref table.\n) pdfformatwarning search_objects exit } if % If the entry is invalid } { % The object is in an object stream. We currently do not rebuild % objects in an object stream. So If we find one, then abort the % verification of the xref table entries. pop exit % Pop object number and then exit loop } ifelse % If not in an object stream } if % If object entry is not free pop % Remove object number } for pop % Remove the size of the file } bind odef /pdfopencache { % - pdfopencache - % Create and initialize some caches. /PageCount pdfpagecount def /PageNumbers PageCount 65534 .min dict def /PageIndex PageCount 65534 .min array def } bind executeonly def /pdfopenfile { % <file> pdfopenfile <dict> //pdfdict readonly pop % can't do it any earlier than this 32 dict begin /LocalResources 0 dict def /DefaultQstate //null def % establish binding /Printed where { pop } { % Guess whether the output device is a printer. /Printed currentpagedevice /OutputFile known def } ifelse currentpagedevice /OutputFile known { currentpagedevice /OutputFile get (%d) search { pop pop pop /NO_PDFMARK_OUTLINES //true def /NO_PDFMARK_DESTS //true def } { pop }ifelse } if /PSLevel1 where { pop } { /PSLevel1 //false def } ifelse % NB: PDFfile is used outside of the PDF code to determine that a % PDF job is being processed; to not change or hide this key. cvlit /PDFfile exch def /PDFsource PDFfile def /Repaired //false def /emitProducer //true def /RepairedAnError //false def /StreamRunAborted //false def /NeedAppearances //false def /ICCProfileNError //false def currentglobal //true .setglobal globaldict begin /UndefProcList 0 dict def end .setglobal PDFfile dup 0 setfileposition 0 () /SubFileDecode filter % to avoid file closure pdfstring readstring pop (%PDF-) search not {/pdfopen cvx /syntaxerror signalerror} if length /PDFoffset exch def pop % some badly formed PDF's (Visioneer) have something other than EOL % after the version number. If we get an error, shorten the string % and try again. //false exch % error encountered { { cvr } stopped { exch pop //true exch 0 1 index length 1 sub dup 0 eq { pop 0 exit } if % exit if string now empty getinterval % trim character from right end and retry } { exch { ( **** Warning: PDF version number not followed by EOL.\n) pdfformatwarning } if exit } ifelse } loop /Classic-xref //true def /PDFversion exch def % Read the last cross-reference table. count /pdfemptycount exch def /Trailer << >> def % Initialize to an emptry dict. {initPDFobjects findxref readxref} PDFSTOPONERROR not { //.internalstopped exec { recover_xref_data % Read failed. Attempt to recover xref data. search_trailer % Search for the primary trailer //false % search_trailer sets up /Trailer, so don't run the code to do that... } { //true } ifelse } { exec //true } ifelse { /Trailer exch def % Save trailer dict after first xref table % Read any previous cross-reference tables. When we are done, % verify that the entries in the xref tables are valid if NoVerifyXref % is not defined. /PrevArray [] def % Empty array, we use this to detect circular /Prev entries in xref (see below) % For some reqason, leaving this on the stack messes up seom files. Trailer { /Prev knownoget not { % If no previous xref table then ... Classic-xref { /NoVerifyXref where { pop } { verify_xref } ifelse } if exit } if %% This code is used to detect circular references in xref tables. Every time %% we detect a /Prev in the xref, we check the given offset of the /Prev xref %% against a list of all previously encountered /Prev offsets. If we find that %% we have previously seen this one, we raise an error, stop processing the xref %% but carry on with the PDF file (unless PDFSTOPONERROR is true). //false exch PrevArray %% Used to determine if the looop found a circular ref { %% //false offset 'array entry' 1 index eq { exch pop //true exch %% We've seen this offset before, pop the false and replace with true exit %% //true offset } if } forall exch %% [...] offset bool { (\n **** Error: Circular /Prev entry while reading xref.\n Aborting xref read, output may be incorrect.\n) pdfformaterror PDFSTOPONERROR { /readxref /syntaxerror cvx signalerror } if pop exit %% [...] and then exit this loop } if PrevArray dup %% offset [...] [...] length 1 add array %% offset [...] [ ] dup 3 1 roll %% offset [ ] [...] [ ] copy pop %% offset [... ] dup dup length 1 sub %% offset [... ] [... ] index 3 index %% offset [... ] [... ] index offset put /PrevArray exch def { readxref } PDFSTOPONERROR not { //.internalstopped exec { recover_xref_data % Read failed. Attempt to recover xref data. /PrevArray where {/PrevArray undef} if %% remove the array we were using to detect circular references exit % Exit loop since recover gets all obj data. } if % If readxref stopped } { exec } ifelse % The PDF spec. says that each trailer dict should contain the required % entries. However we have seen a PDF file that only has a Prev entry in % the initial trailer dict. Acrobat complains but it accepts these files. % To work with these files, we are copying any entries which we find in % a previous trailer dict which are not present in the initial dict. dup { Trailer 2 index known { pop pop % discard if key already present } { Trailer 3 1 roll put % add key if not present } ifelse } forall } loop % Loop to previous trailer /PrevArray where {/PrevArray undef} if %% remove the array we were using to detect circular references } if /NumObjects Objects length def % To check that obj# < NumObjects % Scan numbers in the range 2147483648..4294967295 in Encrypt dictionary % as unsigned integers for compatibility with Acrobat Reader. Bug 689010. << /PDFScanUnsigned //true >> setuserparams { Trailer /Encrypt knownoget { pop pdf_process_Encrypt % signal error } if } stopped << /PDFScanUnsigned //false >> setuserparams { stop } if % Check for recursion in the page tree. Bug 689954, MOAB-06-01-2007 verify_page_tree currentdict end } bind executeonly def %% Executing token on a file will close the file if we reach EOF while %% processing. When repairing broken files (or searching for startxref %% and the xref offset) we do *NOT* want this to happen, because that %% will close PDFfile and we don't have the filename to reopen it. /token_no_close { %% -file- token_no_close <any> true | false dup type /filetype eq { << /EODCount 2 index bytesavailable %% fix data length at underlying bytes /EODString () %% make sure filter passes that many bytes, no EOD /CloseSource //false %% Be sure, tell the filter not to close the source file >> /SubFileDecode filter dup %% -filter- -filter- token { %% -filter- <any> true | false %% token returned a value exch %% <any> filter closefile %% <any> //true %% <any> true }{ %% token didn't find a value closefile %% - //false %% false } ifelse } { token } ifelse } bind executeonly def % Look for the last (startxref) from the current position % of the file. Return the position after (startxref) if found or -1 . /find-startxref { % <file> find_eof <file> <position> -1 { 1 index dup 0 (startxref) /SubFileDecode filter flushfile bytesavailable 9 lt { exit } if pop dup fileposition } loop } bind executeonly def % Search for the last 'startxfer' and read a following token, which % must be a number. Don't pay any attention to %%EOF because it's % often mangled. % There seems to be no limit on the amount of garbage that can be % appended to the PDF file. Current record (60K) belongs to % PDF-Out (v 2.0 - 35). We start the search from the last 1024 % bytes and continue from the beginning of the file. /findxref { % - findxref <xrefpos> PDFfile dup dup dup 0 setfileposition bytesavailable dup /PDFfilelen exch def % Find the last %%EOF string (within 1024 bytes) 1024 sub PDFoffset .max setfileposition find-startxref % file pos|-1 % search the last 1024 bytes dup 0 le { pop dup PDFoffset setfileposition find-startxref % search from the beginnibg dup 0 le { ( **** Error: Cannot find a 'startxref' anywhere in the file.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror /findxref cvx /syntaxerror signalerror } if } if 2 copy setfileposition pop token_no_close not { //null } if dup type /integertype ne { ( **** Error: invalid token after startxref.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror /findxref cvx /syntaxerror signalerror } if } bind executeonly def /stderrfile (%stderr) (w) file def /stdoutfile (%stdout) (w) file def /stderrprint { % <string> stderrprint - //stderrfile dup 3 -1 roll writestring flushfile } bind executeonly def /stdoutprint { % <string> stderrprint - //stdoutfile dup 3 -1 roll writestring flushfile } bind executeonly def /pdfformaterror { % <string> pdfformaterror - stdoutprint /Repaired //true store /RepairedAnError //true store } bind executeonly def /pdfformatwarning { % <string> pdfformaterror - QUIET not {stdoutprint}{pop}ifelse /Repaired //true store PDFSTOPONWARNING {/warning cvx /undefined signalerror} if } bind executeonly def /knownoget_safe { 2 copy knownoget { 3 1 roll pop pop //true } { pop pop //false } ifelse } odef /printProducer { Trailer /Info { knownoget_safe } stopped { pop pop //false } if { /emitProducer where {/emitProducer get}{//true} ifelse { /Producer knownoget not { //null } if }{ pop //null } ifelse } { //null } ifelse dup //null eq { pop } { ( **** The file was produced by: \n **** >>>> ) stderrprint % Handle a Unicode Producer. (\376\377) anchorsearch { pop dup length 2 idiv string 0 1 2 index length 1 sub { % Stack: origstr newstr i 1 index exch 3 index 1 index 2 mul 1 add get put } for exch pop } if stderrprint ( <<<<\n) stderrprint } ifelse } bind executeonly def % The UndefProcList collects noisy warnings. % This gets rid of many multiple warnings from pdf_font.ps /printCollectedWarnings { UndefProcList length 0 gt { (\n **** Embedded font uses undefined procedure\(s\): ) stderrprint UndefProcList { exch .namestring stderrprint ( ) stderrprint =string cvs stderrprint ( times, ) stderrprint } forall (\n) stderrprint } if } bind executeonly def /printrepaired { QUIET not { printCollectedWarnings (\n **** This file had errors that were repaired or ignored.\n) stdoutprint printProducer ( **** Please notify the author of the software that produced this\n) stdoutprint ( **** file that it does not conform to Adobe's published PDF\n) stdoutprint ( **** specification.\n\n) stdoutprint } if } bind executeonly def /printrepairederror { QUIET not { printrepaired ( **** The rendered output from this file may be incorrect.\n) stdoutprint } if } bind executeonly def % Write the outline structure for a file. Uses linkdest (below). % omit links to pages that don't exist. /writeoutline % <outlinedict> writeoutline - { mark 0 2 index /First knownoget { { exch 1 add exch /Next knownoget not { exit } if } loop } if % stack: dict mark count dup 0 eq { pop 1 index } { 2 index /Count knownoget { 0 lt { neg } if } if /Count exch 3 index } ifelse { dup /A knownoget { dup /URI known { /A mark 3 2 roll % <<>> /A [ <<action>> { oforce } forall .dicttomark 3 2 roll } { dup /S knownoget { %% Because we process GoTo Destinations into absolute references in the PDF file %% we need to resolve the /D or /Dest. However, we must *not* do this for %% GoToR Destinations because (obviously) those are in a different file and %% we cannot resolve them into absolute references. We don't need to anyway %% because that file must already have a named destination. dup /GoTo eq { pop dup /D knownoget { exch pop exch dup length dict copy dup /Dest 4 -1 roll put } if }{ dup /GoToR eq { pop /A mark % <<..action dict..>> /A [ 3 2 roll % /A [ <<..action dict..>> { oforce } forall .dicttomark 3 2 roll }{ dup /Launch eq { pop /A mark % <<..action dict..>> /A [ 3 2 roll % /A [ <<..action dict..>> { oforce } forall .dicttomark 3 2 roll }{ /Named eq { /N knownoget { % Assume /S /Named namedactions exch .knownget { exec } if } if } if } ifelse } ifelse } ifelse } if } ifelse } if linkdest } stopped { cleartomark % ignore this link ( **** Warning: Outline has invalid link that was discarded.\n) pdfformatwarning } { /Title knownoget { {/Title exch /OUT pdfmark} stopped {cleartomark} if } { cleartomark ( **** Warning: Outline without /Title attribute was discarded.\n) pdfformatwarning } ifelse } ifelse /First knownoget { { dup writeoutline /Next knownoget not { exit } if } loop } if } bind executeonly def % Close a PDF file. /pdfclose % <dict> pdfclose - { begin PDFfile closefile end } bind executeonly def % ======================== Page accessing ======================== % % Get a (possibly inherited) attribute of a page. /pget % <pagedict> <key> pget <value> -true- % <pagedict> <key> pget -false- { 2 copy knownoget { exch pop exch pop //true } { %% Check to see if there's a Parent 1 index 3 1 roll exch /Parent knownoget { %% If there is a Parent, check to see if this dictionary has a stored object number 3 -1 roll /.gs.pdfobj# .knownget { %% if it does, check the Parent as wwell 1 index /.gs.pdfobj# .knownget { %% Both have object numbers, are they the same (ie its self-referencing) eq { pop pop //false }{ exch pget }ifelse }{ pop exch pget }ifelse } { exch pget }ifelse } % finally see if the key is (misplaced) in the Root Catalog dict { exch pop dup Trailer /Root oget exch knownoget dup { 3 -1 roll ( **** Error: The /) pdfformaterror 50 string cvs pdfformaterror ( key is missing from the Page tree.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } { exch pop } ifelse } ifelse } ifelse } bind executeonly def /parent_obj_get { % /ResourceName pagedict /ObjType LocalResourceDir /ParentResources .knownget { dup 2 index .knownget { % Found ObjType directory 4 index .knownget { 0 get 5 1 roll pop pop pop pop } { parent_obj_get % not found -- check it's parent. } ifelse } { parent_obj_get % not found -- check it's parent. } ifelse } { pop pop pop 0 } ifelse } bind executeonly def /obj_get { % /ResourceName pagedict /ObjType obj_get % success: /ResourceName objnumber % fail: /ResourceName /ResourceName 0 LocalResources 1 index knownoget { dup 4 index .knownget { 0 get 5 1 roll pop pop pop pop } { pop pop pop 0 } ifelse } { % Not in LocalResources. Try Page Resources. 1 index /Resources pget { 1 index knownoget { dup 4 index known { 3 index get 0 get 4 1 roll pop pop pop }{ % Not in Page Resources, recursively try ParentResources as a last resort pop % page Resources LocalResources parent_obj_get }ifelse }{ % No Page Resources, recursively try ParentResources as a last resort pop % page Resources LocalResources parent_obj_get } ifelse } { % No Page Resources, recursively try ParentResources as a last resort pop pop pop 0 }ifelse }ifelse }bind executeonly def % Get the value of a resource on a given page. /rget { % <resname> <pagedict> <restype> rget <value> -true- % <resname> <pagedict> <restype> rget -false- LocalResources 1 index knownoget { 3 index knownoget } { //false } ifelse { exch pop exch pop exch pop //true } { 1 index /Resources pget { 1 index knownoget { 3 index knownoget } { //false } ifelse } { //false } ifelse { 4 1 roll pop pop pop //true } { countdictstack array dictstack //false 5 1 roll dup length 1 sub -1 4 { % false /Name <<>> /Type [<<gstate>>] i 1 index exch get % false /Name <<>> /Type [] <<gstate>> /FormResDict .knownget { % false /Name <<>> /Type [] <<res>> 2 index knownoget { % false /Name <<>> /Type [] <<type_dict>> 4 index knownoget { % false /Name <<>> /type [] <<res_dict>> ( **** Warning: resource was found only in an external (parent) context.\n) pdfformatwarning //true 7 2 roll % <<res_dict>> true false /Name <<>> /Type [] pop exit } if } if } if } for pop pop pop pop } ifelse } ifelse } bind executeonly def % Get the total number of pages in the document. /pdfpagecount % - pdfpagecount <int> { Trailer /Root knownoget { /Pages knownoget { dup /Count knownoget { dup type /integertype eq { dup 0 le } { //true } ifelse { pop dup /Kids knownoget { pop ( **** Warning: Invalid Page count.\n) pdfformatwarning % find the last page and use that as the Count 1 1 999999999 { dup pdffindpage? exch pop //null eq { exit } { pop } ifelse } for 1 sub % decrement to last page that we were able to find 2 copy /Count exch put } { 0 % return 0 and keep 0 page count. ( **** Warning: PDF document has no pages.\n) pdfformatwarning } ifelse } if exch pop } { dup /Type oget /Page eq { << exch 1 array astore /Kids exch /Count 1 /Type /Pages >> Trailer /Root oget /Pages 3 -1 roll put 1 ( **** Warning: No /Pages node. The document /Root points directly to a page.\n) pdfformatwarning } { ( **** Warning: Page count not found; assuming 1.\n) pdfformatwarning pop 1 } ifelse } ifelse } { 0 }ifelse }{ 0 } ifelse } bind executeonly def % Check for loops in the 'page tree' but accept an acyclic graph. % - verify_page_tree - /verify_page_tree { Trailer /Root knownoget { /Pages knownoget { 10 dict begin /Count pdfpagecount def /verify_page_tree_recursive { Count 0 gt { dup 1 def dup /Kids knownoget { { oforce dup //null ne { currentdict 1 index known { ( **** Error: there's a loop in the Pages tree. Giving up.\n) pdfformaterror /verify_page_tree cvx /syntaxerror signalerror } if verify_page_tree_recursive } { pop } ifelse } forall } { /Count Count 1 sub def }ifelse currentdict exch undef } { pop ( **** Error: Too many pages in Page tree.\n) pdfformaterror } ifelse } def verify_page_tree_recursive end } if } if } bind executeonly def /pdffindpage? { % <int> pdffindpage? 1 null (page not found) % <int> pdffindpage? 1 noderef (page found) % <int> pdffindpage? 0 null (Error: page not found) Trailer /Root oget /Pages get { % We should be able to tell when we reach a leaf % by finding a Type unequal to /Pages. Unfortunately, % some files distributed by Adobe lack the Type key % in some of the Pages nodes! Instead, we check for Kids. dup oforce /Kids knownoget not { exit } if exch pop //null 0 1 3 index length 1 sub { 2 index exch get dup oforce dup /Kids known { /Count oget } { pop 1 } ifelse % Stack: index kids null noderef count dup 5 index ge { pop exch pop exit } if 5 -1 roll exch sub 4 1 roll pop } for exch pop % Stack: index null|noderef dup //null eq { pop pop 1 //null exit } if } loop } bind executeonly def % Find the N'th page of the document by iterating through the Pages tree. % The first page is numbered 1. /pdffindpageref { % <int> pdffindpage <objref> dup pdffindpage? % Stack: index countleft noderef 1 index 1 ne { pop pop /pdffindpage cvx /rangecheck signalerror } if exch pop PageIndex 2 index 1 sub 65533 .min 2 index oforce put PageNumbers 1 index oforce 3 index dup 65534 le { put } { pop pop pop } % don't store more than 65534 pagenumbers ifelse exch pop } bind executeonly def /pdffindpage { % <int> pdffindpage <pagedict> pdffindpageref oforce } bind executeonly def % Find the N'th page of the document. % The first page is numbered 1. /pdfgetpage % <int> pdfgetpage <pagedict> { PageIndex 1 index 1 sub dup 65533 lt { get } { pop pop //null } ifelse dup //null ne { exch pop oforce } { pop pdffindpage } ifelse } bind executeonly def % Find the page number of a page object (inverse of pdfgetpage). /pdfpagenumber % <pagedict> pdfpagenumber <int> { % We use the simplest and stupidest of all possible algorithms.... PageNumbers 1 index .knownget { exch pop } { 1 1 PageCount 1 add % will give a rangecheck if not found { dup pdfgetpage oforce 2 index eq { exit } if pop } for exch pop } ifelse } bind executeonly def % Arrange the four elements that define a rectangle into a 'normal' order. /normrect_elems % <x1> <y1> <x2> <y2> normrect_elems <llx> <lly> <urx> <ury> { 4 { % Bug 693919 dup type dup /integertype ne exch /realtype ne and { ( **** Error: replacing malformed number ') pdfformaterror pdfstring cvs pdfformaterror (' with 0.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror 0 } if 4 1 roll } repeat exch 4 1 roll % <x2> <x1> <y1> <y2> 2 copy gt { exch } if % <x2> <x1> <lly> <ury> 4 2 roll 2 copy lt { exch } if % <lly> <ury> <urx> <llx> 4 1 roll exch % <llx> <lly> <urx> <ury> } bind executeonly def % Arrange a rectangle into a 'normal' order. I.e the lower left corner % followed by the upper right corner. /normrect % <rect> normrect <rect> { aload pop normrect_elems 4 array astore } bind executeonly def /fix_empty_rect_elems % </Name> <x1> <y1> <x2> <y2> fix_empty_rect_elems <x1> <y1> <x2'> <y2'> { dup 3 index eq { //true } { 1 index 4 index eq } ifelse { pop pop pop pop ( **** Warning: File has an empty ) pdfformaterror pdfstring cvs pdfformaterror (. Using the current page size instead.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror 0 0 currentpagedevice /PageSize get aload pop } { 5 -1 roll pop } ifelse } bind executeonly def /boxrect % <llx> <lly> <urx> <ury> boxrect <x> <y> <w> <h> { exch 3 index sub exch 2 index sub } bind executeonly def /resolvedest { % <name|string|other> resolvedest <other|null> dup type /nametype eq { Trailer /Root oget /Dests knownoget { exch knownoget not { //null } if } { pop //null } ifelse } { dup type /stringtype eq { Trailer /Root oget /Names knownoget { /Dests knownoget { exch nameoget } { pop //null } ifelse } { pop //null } ifelse } if } ifelse } bind executeonly def % Procedures to do the necessary transformations of view destinations % <PDF2PS_matrix> <rot> <view> -- <view'> /viewdestprocs 8 dict dup begin /Fit { exch pop exch pop } bind executeonly def /FitH { aload length 2 lt { 1 array astore 3 1 roll pop pop }{ 0 4 -1 roll 1 and 0 eq { exch } if 4 -1 roll transform exch pop 2 array astore } ifelse } bind executeonly def /FitV { aload length 2 lt { 1 array astore 3 1 roll pop pop }{ 0 4 -1 roll 1 and 0 ne { exch } if 4 -1 roll transform pop 2 array astore } ifelse } bind executeonly def /FitB /Fit load def /FitBH /FitH load def /FitBV /FitV load def /XYZ { dup length dup 4 gt { pop /viewdestprocs cvx /rangecheck signalerror }{ dup 4 eq { pop aload pop } { dup 3 eq { pop aload pop //null } { dup 2 eq { pop aload pop //null //null } { dup 1 eq { pop aload pop //null //null //null } { pop /viewdestprocs cvx /rangecheck signalerror } ifelse } ifelse } ifelse } ifelse } ifelse 3 1 roll 2 copy 7 -1 roll 1 and 0 ne { exch } if 4 2 roll % odd rotation switches x<->y 2 { dup //null eq { pop 0 } if exch } repeat % replace nulls with 0 7 -1 roll transform % transform coordinates 2 { 3 -1 roll //null eq { pop //null } if exch } repeat % put the nulls back 3 -1 roll 4 array astore } bind executeonly def /FitR { exch pop aload pop 2 { 5 index transform 4 2 roll } repeat normrect_elems 5 array astore exch pop } bind executeonly def end readonly def /linkdest { % <link|outline> linkdest % ([/Page <n>] /View <view> | ) <link|outline> dup /NewWindow knownoget { /NewWindow exch 3 -1 roll } if dup /F knownoget { /File exch 3 -1 roll } if dup /Dest knownoget { resolvedest dup type /dicttype eq { /D knownoget not { //null } if } if dup //null eq { pop } { dup 0 oget //false % don't have a page# and transformation matrix (yet) 1 index type /dicttype eq { 1 index /Type knownoget { /Page eq { pop % the "false" flag dup pdf_cached_PDF2PS_matrix exch dup /Rotate pget not { 0 } if cvi 90 idiv exch pdfpagenumber /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add //true % now we have a page# and a transformation matrix } if } if } if % stack: <link|outline> <dest> ( <PDF2PS_matrix> <rot> <page#> true | <page> false ) { /Page exch 6 2 roll % stack: [/Page <page#>] <link|outline> <dest> <PDF2PS_matrix> <rot> 3 -1 roll dup length 1 sub 1 exch getinterval /View 4 1 roll % stack: [/Page <page#>] <link|outline> /View <PDF2PS_matrix> <rot> <view> //viewdestprocs 1 index 0 get get exec 3 -1 roll } { dup type /integertype eq { /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add /Page exch 1 add 4 2 roll } { pop } ifelse dup length 1 sub 1 exch getinterval /View exch 3 -1 roll } ifelse } ifelse } if } bind executeonly def %% Used to recursively check dictionaries for any /.gs.pdfobj# keys %% and remove them if so %% -any- /Removepdfobj# -any- /Removepdfobj# { dup type /dicttype eq { dup /.gs.pdfobj# known { dup /.gs.pdfobj# undef } if dup {Removepdfobj# 2 index 3 1 roll put} forall } if }bind executeonly def % <pagedict> mark ... -proc- <page#> <error> /namedactions 8 dict dup begin /FirstPage { 1 /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add //false } bind executeonly def /LastPage { pdfpagecount /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add //false } bind executeonly def /NextPage { counttomark 2 add index pdfpagenumber 1 add dup pdfpagecount gt exch /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add exch} bind executeonly def /PrevPage { counttomark 2 add index pdfpagenumber 1 sub dup 1 lt exch /CumulativePageCount where {pop CumulativePageCount}{0}ifelse add exch} bind executeonly def end readonly def % <pagedict> <annotdict> -proc- - % **** The following procedure should not be changed to allow clients % **** to directly interface with the constituent procedures. GSview % **** and some Artifex customers rely on the pdfshowpage_init, % **** pdfshowpage_setpage, pdfshowpage_finish so all logic should be % **** implemented in one of those three procedures. /pdfshowpage % <pagedict> pdfshowpage - { dup /Page exch store pdfshowpage_init % <pagedict> pdfshowpage_setpage % <pagedict> pdfshowpage_finish % - } bind executeonly def /pdfpagecontents % <pagedict> pdfpagecontents <contents> { } bind executeonly def /pdfshowpage_init % <pagedict> pdfshowpage_init <pagedict> { /DSCPageCount DSCPageCount 1 add store } bind executeonly def /get_media_box { % <pagedict> get_media_box <box> <bool> /MediaBox pget { oforce_array //true } { ( **** Error: Page has no /MediaBox attribute. Using the current page size.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror [ 0 0 currentpagedevice /PageSize get aload pop ] //false } ifelse } bind executeonly def /get_any_box { % <pagedict> get_any_box <box name> <box> //systemdict /UseBleedBox .knownget dup { and } if { dup /BleedBox pget { /BleedBox exch } if } if //systemdict /UseTrimBox .knownget dup { and } if { dup /TrimBox pget { /TrimBox exch } if } if dup type /arraytype ne { //systemdict /UseArtBox .knownget dup { and } if { dup /ArtBox pget { /ArtBox exch } if } if } if dup type /arraytype ne { //systemdict /UseCropBox .knownget dup { and } if { dup /CropBox pget { /CropBox exch } if } if } if dup type /arraytype ne { /MediaBox exch get_media_box pop } { oforce_elems % <<pdict>> /SomeBox x0 y0 x1 y1 %% Complicated stuff. We need to use the 'Box' we identified (if any), but we %% need to clamp the boundaries of the 'Box' to the MediaBox. This appears to %% be what Acrobat does. The complication arises because the Box values don't %% have to be sensibly positive, its permissible to have the MediaBox set up %% so that it extends down and left instead of up and right. We take care of the %% content when we st up the CTM, but we do need to make sure that we clamp %% the BoundingBox, and that means we need to take direcitonality into account... 6 -1 roll get_media_box { % /SomeBox x0 y0 x1 y1 [MediaBox] aload pop % /SomeBox x0 y0 x1 y1 X0 Y0 X1 Y1 %% Start with the width, get the X0 and X1 values of the MediaBox 3 index % /SomeBox x0 y0 x1 y1 X0 Y0 X1 Y1 X0 2 index % /SomeBox x0 y0 x1 y1 X0 Y0 X1 Y1 X0 X1 gt { %% Media extends to left 4 -1 roll % /SomeBox x0 y0 x1 y1 Y0 X1 Y1 X0 8 -1 roll % /SomeBox y0 x1 y1 Y0 X1 Y1 X0 x0 .min % /SomeBox y0 x1 y1 Y0 X1 Y1 mX0 7 1 roll % /SomeBox mX0 y0 x1 y1 Y0 X1 Y1 exch % /SomeBox mX0 y0 x1 y1 Y0 Y1 X1 5 -1 roll % /SomeBox mX0 y0 y1 Y0 Y1 X1 x1 .max % /SomeBox mX0 y0 y1 Y0 Y1 mX1 5 1 roll % /SomeBox mX0 mX1 y0 y1 Y0 Y1 }{ %% Media extends to right 4 -1 roll % /SomeBox x0 y0 x1 y1 Y0 X1 Y1 X0 8 -1 roll % /SomeBox y0 x1 y1 Y0 X1 Y1 X0 x0 .max % /SomeBox y0 x1 y1 Y0 X1 Y1 mX0 7 1 roll % /SomeBox mX0 y0 x1 y1 Y0 X1 Y1 exch % /SomeBox mX0 y0 x1 y1 Y0 Y1 X1 5 -1 roll % /SomeBox mX0 y0 y1 Y0 Y1 X1 x1 .min % /SomeBox mX0 y0 y1 Y0 Y1 mX1 5 1 roll % /SomeBox mX0 mX1 y0 y1 Y0 Y1 } ifelse %% Now deal with the height 2 copy % /SomeBox mX0 mX1 y0 y1 Y0 Y1 Y0 Y1 gt { %% Media extends down exch % /SomeBox mX0 mX1 y0 y1 Y1 Y0 4 -1 roll % /SomeBox mX0 mX1 y1 Y1 Y0 y0 .min % /SomeBox mX0 mX1 y1 Y1 mY0 3 1 roll % /SomeBox mX0 mX1 mY0 y1 Y1 .max % /SomeBox mX0 mX1 mY0 mY1 }{ %% Media extends up exch % /SomeBox mX0 mX1 y0 y1 Y1 Y0 4 -1 roll % /SomeBox mX0 mX1 y1 Y1 Y0 y0 .max % /SomeBox mX0 mX1 y1 Y1 mY0 3 1 roll % /SomeBox mX0 mX1 mY0 y1 Y1 .min % /SomeBox mX0 mX1 mY0 mY1 } ifelse exch % /SomeBox mX0 mX1 mY1 mY0 3 1 roll % /SomeBox mX0 mY0 mX1 mY1 } { pop } ifelse 4 array astore % /SomeBox [mX0 mY0 mX1 mY1] } ifelse } bind executeonly def % Compute the matrix that transforms the PDF->PS "default" user space /pdf_PDF2PS_matrix { % <pdfpagedict> -- matrix matrix currentmatrix matrix setmatrix exch % stack: savedCTM <pdfpagedict> dup get_any_box % stack: savedCTM <pdfpagedict> /Trim|Crop|Art|MediaBox <Trim|Crop|Art|Media Box> oforce_elems normrect_elems fix_empty_rect_elems 4 array astore //systemdict /PDFFitPage known { PDFDEBUG { (Fiting PDF to imageable area of the page.) = flush } if currentpagedevice /.HWMargins get aload pop currentpagedevice /PageSize get aload pop % Adjust PageSize and .HWMargins for the page portrait/landscape orientation 2 copy gt % PageSize_is_landscape 7 index aload pop 3 -1 roll sub 3 1 roll exch sub exch 10 index /Rotate pget not { 0 } if cvi 90 idiv 1 and 0 ne { exch } if gt % Box_is_landscape xor % PageSize_is_landscape(or square) xor'ed with Box_is_lanscape suggests rotate 2 index 2 index eq not and { % don't rotate if Page is square 1 index 0 translate 90 rotate % add in a rotation PDFDEBUG { ( Rotating the page for best fit) = flush } if 2 copy ne { % rotate the .HWMargins 2 copy lt { 6 2 roll 4 -1 roll 6 -2 roll } { 6 2 roll 4 1 roll 6 -2 roll } ifelse % rotate the page dimensions exch } if } if 3 -1 roll sub 3 1 roll exch sub exch % stack: savedCTM <pdfpagedict> <Crop|Media Box> Xmin Ymin Xmax Ymax PDFDEBUG { ( Translate up by [ ) print 3 index =print (, ) print 2 index =print ( ]) = flush } if 3 index 3 index translate % move origin up to imageable area 2 index sub exch 3 index sub exch 4 2 roll pop pop % stack: savedCTM <pdfpagedict> [Box] XImageable YImageable 2 index aload pop 2 index sub exch 3 index sub exch 4 2 roll pop pop 5 index /Rotate pget not { 0 } if 90 cvi idiv 1 and 0 ne { exch } if % stack: savedCTM <pdfpagedict> [Box] XImageable YImageable XBox YBox 4 copy 3 -1 roll exch div 3 1 roll div .min % stack: savedCTM <pdfpagedict> [Box] XImageable YImageable XBox YBox scale PDFDEBUG { ( Scale by ) print dup = flush } if 5 -4 roll % stack: savedCTM <pdfpagedict> [Box] scale XImageable YImageable XBox YBox 3 index 2 index 6 index mul sub 2 div 3 index 2 index 7 index mul sub 2 div PDFDEBUG { ( Centering translate by [ ) print 1 index =print (, ) print dup =print ( ]) = flush } if translate pop pop pop pop } { //systemdict /NoUserUnit .knownget not { //false } if { 1 } { 1 index /UserUnit knownoget { PDFDEBUG { (Scaling due to UserUnit by ) print dup = flush } if } { 1 } ifelse } ifelse } ifelse % stack: savedCTM <pdfpagedict> [Box] scale dup scale % Rotate according to /Rotate aload pop boxrect { { pop pop } { -90 rotate pop neg 0 translate } { 180 rotate neg exch neg exch translate } { 90 rotate neg 0 exch translate pop } } 5 index /Rotate pget not { 0 } if cvi PDFDEBUG { dup 0 ne { (Rotating by ) print dup =print ( degrees.) = flush } if } if 90 idiv 3 and get exec % Now translate to the origin given in the Crop|Media Box exch neg exch neg translate % stack: savedCTM <pdfpagedict> pop matrix currentmatrix exch setmatrix } bind executeonly def % Cache the matrix that transforms the PDF->PS "default" user space % into <pdfpagedict> under the key //PDF2PS_matrix_key, then return it /PDF2PS_matrix_key (PDF->PS matrix) cvn def /pdf_cached_PDF2PS_matrix { % <pdfpagedict> -- <PDF2PS_matrix> dup //PDF2PS_matrix_key .knownget { exch pop } { dup dup pdf_PDF2PS_matrix //PDF2PS_matrix_key exch put //PDF2PS_matrix_key get } ifelse } bind executeonly def currentdict /PDF2PS_matrix_key undef /.pdfshowpage_Install { % <pagedict> [<prevproc>] .pdfshowpage_Install - 0 get exec pdf_cached_PDF2PS_matrix concat } bind executeonly def /pdfshowpage_setpage { % <pagedict> pdfshowpage_setpage <pagedict> 6 dict begin % for setpagedevice % Stack: pdfpagedict % This comment is no longer true, and is maintained here for history only: % % UseCIEColor is always true for PDF; see the comment in runpdf above % % We now test the page to see if it defines any Default* colour spaces and % only set UseCIEColor if it does. This prevents a spurious warning from % pdfwrite about not using UseCIEColor with pdfwrite. % pdfshowpage_detect_cspacesub { /UseCIEColor //true def } if % Only lock in Orientation if we need to for pdfmarks .writepdfmarks { /Orientation 0 def } if currentpagedevice % Stack: pdfpagedict currentpagedevicedict 1 index get_any_box % Stack: pdfpagedict currentpagedevicedict /BoxName [box] oforce_elems normrect_elems fix_empty_rect_elems boxrect 4 2 roll pop pop 3 index /Rotate pget not { 0 } if cvi 90 idiv 1 and 0 ne { exch } if % stack: pdfpagedict currentpagedevicedict boxwidth boxheight //systemdict /PDFFitPage known { % Preserve page size, % but choose portrait/landscape depending on box width:height ratio % (if box width == height, select portrait orientation) gt 1 index /PageSize get aload pop 2 copy gt 4 -1 roll ne { exch } if } { % Set the page size. //systemdict /NoUserUnit .knownget not { //false } if not { 3 index /UserUnit knownoget { dup 4 -1 roll mul 3 1 roll mul } if } if } ifelse 2 array astore /PageSize exch def % Determine the number of spot colors used on the page. Note: This searches % the pages resources. It may be high if a spot color is in a resource but % is not actually used on the page. currentpagedevice /PageSpotColors known { /PageSpotColors 2 index countspotcolors def } if % If the user told us to use a named OutputIntent systemdict /UseOutputIntent .knownget { cvn % Check to see if this page has such an OutputIntent 2 index /OutputIntents knownoget { { dup /OutputConditionIdentifier get cvn dup /Custom eq { pop dup /Info get cvn }if 2 index eq { %% Found the required OutputIntent /DestOutputProfile knownoget { [ /ICCBased 3 -1 roll ] ICCBased-resolve 1 get .set_outputintent () } if pop exit }{ pop } ifelse } forall pop }{ pop }ifelse } if % Let the device know if we will be using PDF 1.4 transparency. % The clist logic may need to adjust the size of bands. 1 index pageusestransparency /PageUsesTransparency exch def dup /Install .knownget { % Don't let the Install procedure get more deeply % nested after every page. dup type dup /arraytype eq exch /packedarraytype eq or { dup length 4 eq { dup 2 get /.pdfshowpage_Install load eq { 1 get 0 get % previous procedure } if } if } if } { { } } ifelse 1 array astore 2 index exch /.pdfshowpage_Install load /exec load 4 packedarray cvx % Stack: pagedict currentpagedict installproc /Install exch def % Stack: pagedict currentpagedict pop currentdict end setpagedevice } bind executeonly def /.free_page_resources { % - .free_page_resources - Page /Resources pget { /Shading knownoget { { dup type /dicttype eq { dup /.shading_dict known { dup /.shading_dict undef } if } if pop pop } forall } if } if } bind executeonly def /pdfshowpage_finish { % <pagedict> pdfshowpage_finish - save /PDFSave exch store /PDFdictstackcount countdictstack store /PDFexecstackcount count 2 sub store (before exec) VMDEBUG % set up color space substitution (this must be inside the page save) pdfshowpage_setcspacesub .writepdfmarks { % Pagelabel pagelabeldict begin dopagelabel end % Copy the boxes. % Copy the boxes. { /CropBox /BleedBox /TrimBox /ArtBox } { 2 copy pget { % .pdfshowpage_Install transforms the user space do same here with the boxes oforce_elems 2 { Page pdf_cached_PDF2PS_matrix transform 4 2 roll } repeat normrect_elems 4 index 5 1 roll fix_empty_rect_elems 4 array astore mark 3 1 roll {/PAGE pdfmark} stopped {cleartomark} if } { pop } ifelse } forall } if % end .writepdfmarks % Display the actual page contents. 9 dict begin /BXlevel 0 def /BMClevel 0 def /OFFlevels 0 dict def /BGDefault currentblackgeneration def /UCRDefault currentundercolorremoval def %****** DOESN'T HANDLE COLOR TRANSFER YET ****** /TRDefault currenttransfer def matrix currentmatrix 2 dict 2 index /CropBox pget { oforce_elems normrect_elems boxrect 4 array astore 1 index /ClipRect 3 -1 roll put } if dictbeginpage setmatrix /DefaultQstate qstate store count 1 sub /pdfemptycount exch store % If the page uses any transparency features, show it within % a transparency group. The scan was performed during pdfshowpage_setpage % and the result was set in the pagedevice dictionary. Use it rather than % scanning again IF it is present. If the pdfshowpage_setup was not called % (eg GSView 5) then it will not be present, so we must rescan. currentpagedevice /PageUsesTransparency .knownget not {dup pageusestransparency} if dup /PDFusingtransparency exch def { % If the current device isn't CMYK, or if it is a HighLevelDevice (pdfwrite) we % don't need the special handling of Overprint transparency, so disable the checking. currentpagedevice dup /Colors get 4 lt exch /HighLevelDevice known or { /checkOPtrans { pop //false } def % NB: original will be restored from PDFsave } if % Show the page within a PDF 1.4 device filter. 0 .pushpdf14devicefilter { /DefaultQstate qstate store % device has changed -- reset DefaultQstate % If the page has a Group, enclose contents in transparency group. % (Adobe Tech Note 5407, sec 9.2) dup /Group knownoget { 1 index /CropBox pget { /CropBox exch } { 1 index get_media_box pop /MediaBox exch } ifelse oforce_elems normrect_elems fix_empty_rect_elems 4 array astore .beginpagegroup showpagecontents .endtransparencygroup } { showpagecontents } ifelse } stopped { % abort the transparency device .abortpdf14devicefilter /DefaultQstate qstate store % device has changed -- reset DefaultQstate stop } if { } settransfer % identity transfer during popdevice (put_image) .poppdf14devicefilter % NB: reset to DefaultQstate will also restore transfer function /DefaultQstate qstate store % device has changed -- reset DefaultQstate } { /checkOPtrans { pop //false } def % no-op the check if the page doesn't use transparency % NB: original will be restored from PDFsave showpagecontents } ifelse .free_page_resources % todo: mixing drawing ops outside the device filter could cause % problems, for example with the pnga device. endpage end % scratch dict % Some PDF files don't have matching q/Q (gsave/grestore) so we need % to clean up any left over dicts from the dictstack PDFdictstackcount //false { countdictstack 2 index le { exit } if currentdict /n known not or end } loop { StreamRunAborted not { (\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 } executeonly if pop count PDFexecstackcount sub { pop } repeat (after exec) VMDEBUG Repaired % pass Repaired state around the restore RepairedAnError PDFSave restore currentglobal //pdfdict gcheck .setglobal //pdfdict /.Qqwarning_issued //false .forceput .setglobal /RepairedAnError exch def /Repaired exch def } bind executeonly odef % Display the contents of a page (including annotations). /showpagecontents { % <pagedict> showpagecontents - dup % Save the pagedict for the Annotations % We do a 'save' here in order to allow us to restore at the end of the page, before % we run the annotations. There are two reasons for this; firstly so that the graphics state % at the time we run the annotations is the same as when we ran the page, secondly in order % to empty the font cache before we run the annotations. % % Bug #700096 an annotation uses Helvetica but doesn't embed it, however the page *does* % use an embedded Helvetica, which is subset and not prefixed as such. For this file to % render correctly we must not use the font from the page, but must find a replacement. % However the file for Bug #695897 has a page which uses two versions of the same font, % one embedded, one not. In order for *that* file to render correctly we *must* use the % embedded font as a substitute for the missing font. So we divorce the fonts used % for the page from the fonts used for Annotations, this allows both files to work as % expected. % % We also need a countdictstack, so that we can check the dictionaries on the dictioanry % stack after we run the page contents, and 'end' an extra ones before we try to restore % otherwise we might try to restore back to a point before one of those dictionaries existed. % save countdictstack 3 -1 roll count 1 sub /pdfemptycount exch store /Contents knownoget not { 0 array } if dup type /arraytype ne { 1 array astore } if { oforce dup type /dicttype eq { //false resolvestream pdfopdict .pdfrun } { (**** Error: The Page /Contents array contains an element which is not a stream\n This page will not display correctly\n\n) pdfformaterror pop exit }ifelse } forall % check for extra garbage on the ostack and clean it up count pdfemptycount sub dup 0 ne { ( **** Error: File did not complete the page properly and may be damaged.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror { pop } repeat } { pop } ifelse % Top of the stack should ow be the count of dictionaries on the stack at the time % we did a save. If there are more than there were then, end dictionaries until % we get back to the sme number. { countdictstack 1 index le {exit}if end } loop % discard the count of dictionaries pop % and restore the state. This will take us back to a point before any fonts % used on the page were defined, so the annotations won't inherit any of % them. restore % Draw the annotations //systemdict /ShowAnnots .knownget not { //true } if { /Annots knownoget { { oforce dup //null ne { .writepdfmarks %% %% We don't want to preserve annotations with ps2write, because we don't convert them %% back into pdfmarks on output. %% /ForOPDFRead /GetDeviceParam .special_op { exch pop }{ //false }ifelse not and //systemdict /PreserveAnnots .knownget not {//true} if and { mark exch {preserveannot} PDFSTOPONERROR {exec}{stopped {(Error: Ignoring invalid annotation, output may be incorrect.\n) pdfformaterror} if} ifelse cleartomark }{ mark exch {drawannot} PDFSTOPONERROR {exec}{stopped {(Error: Ignoring invalid annotation, output may be incorrect.\n) pdfformaterror} if} ifelse cleartomark } ifelse } { pop } ifelse } forall } if } if //systemdict /ShowAcroForm .knownget { //true eq } { //false } ifelse { Trailer /Root oget /AcroForm knownoget { draw_acro_form } if } if } bind executeonly def /processcolorspace { % - processcolorspace <colorspace> % The following is per the PLRM3. currentdevice 1 dict dup /ProcessColorModel dup put .getdeviceparams exch pop exch pop dup type /nametype ne { cvn } if dup { setcolorspace } //.internalstopped exec { pop /DeviceRGB } if } bind executeonly def % ------ Transparency support ------ % % Determine whether a page might invoke any transparency features: % - Non-default BM, ca, CA, or SMask in an ExtGState % - Image XObject with SMask % Note: we deliberately don't check to see whether a Group is defined, % because Adobe Illustrator 10 (and possibly other applications) define % a page-level group whether transparency is actually used or not. % Ignoring the presence of Group is justified because, in the absence % of any other transparency features, they have no effect. % % Transparency is a 1.4 feature however we have seen files that claimed % to be PDF 1.1 with transparency features. Bugs 689288, 691273. /pageusestransparency { % <pagedict> pageusestransparency <bool> NOTRANSPARENCY { pop //false } { dup //false exch { 4 dict 1 index resourceusestransparency { pop not exit } if %% Check the current dictionary and its Parent (if any) to see %% if they both have stored object numbers. If they do then %% check the numbers, don't allow self-references. dup /Parent knownoget not { pop exit } { exch /.gs.pdfobj# .knownget { 1 index /.gs.pdfobj# .knownget { eq { pop exit }if }{ pop }ifelse }if } ifelse } loop % Also check for transparency in the annotation (if not in resources). { pop //true } { annotsusetransparency } ifelse } ifelse } bind executeonly def % Check if transparency is specified in an ExtGState dict /extgstateusestransparency { % <gstate dict> extgstateusestransparency <bool> //false exch % Assume no transparency dup //null eq { pop % bug 692050 } { { % establish loop context dup /BM knownoget { dup /Normal ne exch /Compatible ne and { pop not exit } if } if dup /ca knownoget { 1 ne { pop not exit } if } if dup /CA knownoget { 1 ne { pop not exit } if } if dup /SMask knownoget { /None ne { pop not exit } if } if pop exit } loop } ifelse } bind executeonly def % Check if transparency is used in a Pattern /patternusestransparency { % <Pattern dict> patternusestransparency <bool> dup //null eq NOTRANSPARENCY or { pop //false } { //false exch % Assume no transparency { 4 dict 1 index resourceusestransparency { pop not exit } if dup /ExtGState knownoget { extgstateusestransparency { pop not exit } if } if pop exit } loop } ifelse } bind executeonly def % Check the Resources of a page or Form. Check for loops in the resource chain. /resourceusestransparency { % <dict> <dict> resourceusestransparency <bool> { % Use loop to provide an exitable context. /Resources knownoget not { 0 dict } if 2 copy .knownget { { % Some circular references may be missed because scanning stops % when the 1st transparency is found. ( **** Warning: Found circular references in resource dictionaries while checking for transparency.\n) pdfformatwarning } if pop //false exit } if 2 copy //true put % In the current chain. dup /ExtGState knownoget { //false exch { exch pop oforce extgstateusestransparency { pop //true exit } if } forall { pop //true exit } if } if dup /Pattern knownoget { //false exch { exch pop oforce patternusestransparency { pop //true exit } if } forall { pop //true exit } if } if dup /XObject knownoget { dup type /dicttype eq { //false exch { exch pop oforce dup //null ne { dup type /dicttype eq { dup /Subtype get dup /Image eq { 1 index /SMask oknown { pop pop not exit } if 1 index /SMaskInData knownoget { 0 ne { pop pop not exit } if } if } if /Form eq { dup /Group known {pop pop //true exit}{ 3 index exch resourceusestransparency { not exit } if } ifelse } { pop } ifelse } { pop ( **** Warning: Ignoring non-dictionary /XObject attribute while checking for transparency.\n) pdfformatwarning } ifelse } { pop } ifelse } forall { pop //true exit } if } { ( **** Warning: Ignoring non-dictionary /XObject while checking for transparency.\n) pdfformatwarning pop } ifelse } if dup /Font knownoget { //false exch { exch pop oforce dup type /dicttype eq { dup /Subtype knownoget { /Type3 eq { 3 index exch resourceusestransparency { pop //true exit } if } {pop} ifelse } { pop }ifelse } { % probably a name object pop }ifelse } forall { pop //true exit } if } if 2 copy //false put % Visited but not in the current chain. pop //false exit } loop exch pop } bind executeonly def % Check if the annotations on a page use transparency /annotsusetransparency { % <page dict> annotsusetransparency <bool> //false exch % Assume no transparency /Annots knownoget { % Get Annots array { oforce dup //null ne { dup /Subtype knownoget { /Highlight eq { % Highlight annotation is always implemented pop pop //true exit % as transparency. } if } if dup /AP knownoget { % Get appearance dict for the annoation /N knownogetdict { % Get the /N (i.e. normal) appearance stream 4 dict exch resourceusestransparency { pop pop //true exit } if } if } if % If AP dict known dup /BM knownoget { //true exit } if dup /CA knownoget { 1 le { pop pop //true exit } if } if /ca knownoget { 1 le { pop //true exit } if } if } { pop } ifelse } forall % For all annots on the page } if } bind executeonly def % Add a color name to our spot color list. Ignore /All and /None /putspotcolor { % <name> <spotcolordict> putspotcolor - % The 'name' could be a string. If so then convert to a name. exch dup type /stringtype eq { cvn } if dup dup /None eq exch /All eq or { pop pop } { 0 put } ifelse } bind executeonly def % Determine which spot colors are used within a color space Note: This % dict will include all colors used in Separation or DeviceN color spaces. % Thus it may include Cyan, Magenta, Yellow, and Black. % <colorspace> <spotcolordict> colorspacespotcolors - /colorspacespotcolors { exch dup type /arraytype eq { % If we have an Indexed color space then get the base space. dup 0 oget % <<>> [csp] /Type dup /Indexed eq { pop 1 oget % <<>> [base] 2 copy exch colorspacespotcolors } { % Stack: <spotcolordict> <colorspace> <colorspacetype> dup /Separation eq exch /DeviceN eq or { dup 1 oget dup type /arraytype eq { { oforce 2 index putspotcolor } forall } { 2 index putspotcolor } ifelse } if } ifelse } if pop pop } bind executeonly def % Check the Resources of a page, form, or annotation. Determine which spot % colors are used within the resource Note: The spot color dict will include % all colors used in Separation or DeviceN color spaces. Thus it may include % Cyan, Magenta, Yellow, and Black. We also pass a dict that is used to check % for loops in the resource list. % <spotcolordict> <loopdict> <page/form/annot dict> % resourcespotcolors <spotcolordict> <loopdict> /resourcespotcolors { { % Use loop to provide an exitable context. % Exit if no Resources entry /Resources knownoget not { exit } if % Exit if we have already seen this dict 2 copy known { pop exit } if % Save the Resources dict into our loop checking dict. 2 copy 0 put % Scan resources that might contain a color space. dup /ColorSpace knownoget { { exch pop oforce 3 index colorspacespotcolors } forall } if dup /Pattern knownoget { { exch pop oforce dup /Shading knownoget { exch pop /ColorSpace oget 3 index colorspacespotcolors } { 4 copy exch pop resourcespotcolors pop pop pop } ifelse } forall } if dup /Shading knownoget { { exch pop oforce /ColorSpace { oget } stopped { pop pop ( **** Error: invalid color space in shading, output may be incorrect.\n) pdfformaterror } { 3 index colorspacespotcolors} ifelse } forall } if /XObject knownoget { dup type /dicttype eq { { exch pop oforce dup type /dicttype eq { dup //null ne { dup /Subtype oget dup /Form eq { pop resourcespotcolors } { /Image eq { /ColorSpace knownoget { 2 index colorspacespotcolors } if } { pop } ifelse } ifelse } { pop } ifelse } { pop } ifelse } forall } { pop % Just ignore here, already reported by resourceusestransparency. } ifelse } if exit } loop } bind executeonly def % Determine which spot colors are used within the annotations. Note: This % dict will include all colors used in Separation or DeviceN color spaces. % Thus it may include Cyan, Magenta, Yellow, and Black. % <spotcolordict> <loopdict> <annotsarray> % annotsspotcolors <spotcolordict> <loopdict> /annotsspotcolors { { oforce dup //null ne { /AP knownoget { % Get appearance dict for the annoation /N knownogetdict { % Get the /N (i.e. normal) appearance stream resourcespotcolors } if % If normal appearance streamknown } if % If AP dict known } { pop } ifelse } forall } bind executeonly def % Determine spot colors are used within a page. We are creating a dict to % hold the spot color names as keys. Using a dict avoids having to worry % about duplicate entries. The keys in the dict contain the spot color % names. However the values have no meaning. Note: This dict will include % all colors used in Separation or DeviceN color spaces specified in the % page's resources. Thus it may include Cyan, Magenta, Yellow, and Black. % There is no attempt to verify that these color spaces are actually used % within the object streams for the page. /pagespotcolors { % <pagedict> pagespotcolors <spotcolordict> dup % Create a dict to hold spot color names. 0 dict exch % Create a dict to be used to check for reference loops. 4 dict exch % Check for color spaces in the Resources resourcespotcolors % now check upwards in the object hierarchy in case of inherited resources 2 index { /Parent knownoget { dup 4 1 roll resourcespotcolors 3 -1 roll } { exit } ifelse } loop % Also check for color spaces in the annotations. 3 -1 roll /Annots knownoget { annotsspotcolors } if pop % Discard reference loop dict } bind executeonly def % Determine how many (if any) spot colors are used by a page. % Note: This count does not include Cyan, Magenta, Yellow, or Black /countspotcolors { % <pagedict> countspotcolors <count> pagespotcolors % Get dict with all spot colors dup length % spot color dict length % Remove CMYK from the spot color count. [ /Cyan /Magenta /Yellow /Black ] { 2 index exch known { 1 sub } if } forall exch pop % Remove spot color dict } bind executeonly def % ------ ColorSpace substitution support ------ % %% %% <pagedict> pdf_colorspace_detect_cspacesub <boolean> %% /pdf_colorspace_detect_cspacesub { //false exch /Resources knownoget { /ColorSpace knownoget { dup /DefaultGray knownoget { resolvecolorspace csncomp 1 eq { pop pop //true } if } { dup /DefaultRGB knownoget { resolvecolorspace csncomp 3 eq { pop pop //true } if } { /DefaultCMYK knownoget { resolvecolorspace csncomp 4 eq { pop //true } if } if } ifelse } ifelse } if } if } bind executeonly def %% <loopdict> <Objectdict> <calling obj_num> pdfform_detect_cspacesub <boolean> %% /pdf_object_detect_cspacesub { %% use loop operator for an exitable context %% we need this to detect recursion/looping { exch %% <loopdict> <calling obj_num> <Objectdict> dup pdf_colorspace_detect_cspacesub { pop pop //true exit }{ %% <loopdict> <calling obj_num> <Objectdict> /Resources knownoget { %% <loopdict> <calling obj_num> <Resourcesdict> 2 index 1 index known { %% We've already seen this object, ignore it and exit pop pop //false exit }{ 2 index 1 index //null put } ifelse /XObject knownoget { %% <loopdict> <calling obj_num> <XObjectdict> //false exch %% <loopdict> <calling obj_num> <XObjectdict> false %% We have files where the XObject Resource is not a dictionary dup type /dicttype eq { %% <loopdict> <calling obj_num> <XObjectdict> false %% check each Xobject entry in the dictionary, %% forall purs a key/value pair on the stack for us. %% { %% <loopdict> <calling obj_num> <XObjectdict> false key value exch pop %% <loopdict> <calling obj_num> <XObjectdict> false value %% If this is an indirect reference, check if its the smae object %% as the current one. If its not indirect, make the object number 0 %% for comparison purposes. dup type /packedarraytype eq { dup 0 get dup 4 index eq } { 0 //false }ifelse %% <calling obj_num> <XObjectdict> false value <form object or 0 if not indirect> <boolean> not { %% swap object number and value, and dereference value exch oforce %% Apparently we have files where the content of the XObject Resource dictionary is null dup //null ne { %% and files where the indivudal XObjects are not dictionaries dup type /dicttype eq { dup /Subtype get /Form eq { exch 4 index 3 1 roll pdf_object_detect_cspacesub { pop //true exit } if } { pop pop }ifelse }{ pop pop } ifelse }{ pop pop } ifelse }{ pop pop } ifelse } forall }{ pop }ifelse } { %% No forms, so can't be any Default* spaces //false }ifelse } { //false } ifelse } ifelse %% Remove the calling object ID, return our boolean exch pop exit } loop %% remove and discard the loopdict exch pop } bind executeonly def % % <pagedict> pdfshowpage_detect_cspacesub <pagedict> <boolean> % % this is used simply to detect whether the current page has any % Default* color spaces defined. If it does then we want pdfshowpage_setpage % to set UseCIEColor to true so that the Default* space is used. If the % page doesn't use any Default* spaces, then we *don't* want to set % UseCIEColor as that will confuse a warning in pdfwrite about % not using UseCIEColor with pdfwrite. % /pdfshowpage_detect_cspacesub { dup 0 1 dict 3 1 roll pdf_object_detect_cspacesub /HighLevelDevice /GetDeviceParam .special_op { exch pop not exch pop }if } bind executeonly def % % <pagedict> pdfshowpage_setcspacesub <pagedict> % % Set up color space substitution for a page. Invocations of this procedure % must be bracketed by the save/restore operation for the page, to avoid % unintended effects on other pages. % % If any color space substitution is used, and the current color space is a % device dependent color space, make sure the current color space is updated. % There is an optimization in the setcolorspace operator that does % nothing if both the current and operand color spaces are the same. For % PostScript this optimization is disabled if the UseCIEColor page device % parameter is true. This is not the case for PDF, as performance suffers % significantly on some PDF files if color spaces are set repeatedly. Hence, % if color space substitution is to be used, and the current color space % is a device dependent color space, we must make sure to "transition" the % current color space. % /pdfshowpage_setcspacesub { //false /DefaultGray 2 index /ColorSpace //rget exec { resolvecolorspace dup csncomp 1 eq { dup type /nametype eq { 1 array astore } if /DefaultGray exch /ColorSpace defineresource pop pop //true } { pop ( **** Error: ignoring invalid /DefaultGray color space.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } ifelse } if /DefaultRGB 2 index /ColorSpace //rget exec { resolvecolorspace dup csncomp 3 eq { dup type /nametype eq { 1 array astore } if /DefaultRGB exch /ColorSpace defineresource pop pop //true } { pop ( **** Error: ignoring invalid /DefaultRGB color space.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } ifelse } if /DefaultCMYK 2 index /ColorSpace //rget exec { resolvecolorspace dup csncomp 4 eq { dup type /nametype eq { 1 array astore } if /DefaultCMYK exch /ColorSpace defineresource pop pop //true } { pop ( **** Error: ignoring invalid /DefaultCMYK color space.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } ifelse } if { % if using color space substitution, "transition" the current color space currentcolorspace dup length 1 eq { % always an array 0 get dup /DeviceGray eq 1 index /DeviceRGB eq or 1 index /DeviceCMYK eq or { /Pattern setcolorspace setcolorspace } { pop } ifelse } { pop } ifelse } if } bind executeonly def % Write OutputIntents to device if the device handles it /writeoutputintents { currentdevice 1 dict dup /OutputIntent //null put readonly .getdeviceparams mark ne { pop pop % device supports OutputIntent parameter % Make sure we don't have a badly broken PDF file! Trailer /Root knownoget { /OutputIntents knownoget { dup type /arraytype eq { { % process all output profiles present oforce dup length dict .copydict dup /DestOutputProfile knownoget { PDFfile fileposition exch mark exch { oforce } forall .dicttomark //true resolvestream [ { counttomark 1 add index 64000 string readstring not { exit } if } loop ] exch closefile 0 1 index { length add } forall .bytestring 0 3 2 roll { 3 copy putinterval length add } forall pop exch PDFfile exch setfileposition 1 index /DestOutputProfile 3 2 roll put } if % Convert to string array because it's easier for the device [ 1 index /OutputCondition knownoget not { () } if 2 index /OutputConditionIdentifier knownoget not { () } if 3 index /RegistryName knownoget not { () } if 4 index /Info knownoget not { () } if 5 index /DestOutputProfile knownoget not { () } if ] [ /OutputIntent 3 2 roll /.pdfputparams where { pop .pdfputparams } { currentdevice //null //false counttomark 1 add 3 roll .putdeviceparamsonly } ifelse pop pop pop % done with this OutputIntent dictionary } forall } { pop ( **** Error: /OutputIntent is of an incorrect type, ignoring OutputIntent.\n) pdfformaterror ( Output may be incorrect.\n) pdfformaterror } ifelse } if % OutputIntents known % tell device there are no more OutputIntents [ /OutputIntent [ ] /.pdfputparams where { pop .pdfputparams } { currentdevice //null //false counttomark 1 add 3 roll .putdeviceparamsonly } ifelse pop pop } if } if } bind executeonly def end % pdfdict .setglobal %% This list of operators are used internally by various parts of the Ghostscript PDF interpreter. %% Since each operator is a potential security vulnerability, and any operator listed here %% is not required once the initislisation is complete and functions are bound, we undefine %% the ones that aren't needed at runtime. /.PDF_UNDEF_OPLIST [ /.pdfawidthshow /.pdfwidthshow /.currentblackptcomp /.setblackptcomp /.setfillcolor /.setfillcolorspace /.setstrokecolor /.setstrokecolorspace /.currentrenderingintent /.setrenderingintent /.currenttextrenderingmode /.settextspacing /.currenttextspacing /.settextleading /.currenttextleading /.settextrise /.currenttextrise /.setwordspacing /.currentwordspacing /.settexthscaling /.currenttexthscaling /.settextlinematrix /.currenttextlinematrix /.currenttextmatrix /.settextmatrix /.currentblendmode /.currentopacityalpha /.currentshapealpha /.currenttextknockout /.pushextendedgstate /.popextendedgstate /.begintransparencytextgroup /.endtransparencytextgroup /.begintransparencymaskgroup /.begintransparencymaskimage /.endtransparencymask /.image3x /.abortpdf14devicefilter /.pdfinkpath /.pdfFormName /.setstrokeconstantalpha /.setfillconstantalpha /.setalphaisshape /.currentalphaisshape /.settextspacing /.currenttextspacing /.settextleading /.currenttextleading /.settextrise /.currenttextrise /.setwordspacing /.currentwordspacing /.settexthscaling /.currenttexthscaling /.setPDFfontsize /.currentPDFfontsize /.setdistillerparams % Used by our own test suite files %/.pushpdf14devicefilter % transparency-example.ps %/.poppdf14devicefilter % transparency-example.ps %/.setopacityalpha % transparency-example.ps %/.setshapealpha % transparency-example.ps %/.endtransparencygroup % transparency-example.ps % undefining these causes errors/incorrect output %/.settextrenderingmode /.setblendmode /.begintransparencygroup /.settextknockout /.setstrokeoverprint /.setfilloverprint %/.currentstrokeoverprint /.currentfilloverprint /.currentfillconstantalpha /.currentstrokeconstantalpha ] def DELAYBIND not { .PDF_UNDEF_OPLIST {systemdict exch .undef} forall systemdict /.PDF_UNDEF_OPLIST .undef } if