% Copyright (C) 1994, 2000 Aladdin Enterprises. 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. % % For more information about licensing, please refer to % http://www.ghostscript.com/licensing/. For information on % commercial licensing, go to http://www.artifex.com/licensing/ or % contact Artifex Software, Inc., 101 Lucas Valley Road #110, % San Rafael, CA 94903, U.S.A., +1(415)492-9861. % $Id: pdf_draw.ps,v 1.98 2005/10/05 14:37:59 ray Exp $ % pdf_draw.ps % PDF drawing operations (graphics, text, and images). /.setlanguagelevel where { pop 2 .setlanguagelevel } if .currentglobal true .setglobal /pdfdict where { pop } { /pdfdict 100 dict def } ifelse GS_PDF_ProcSet begin pdfdict begin % For simplicity, we use a single interpretation dictionary for all % PDF graphics operations, even though this is too liberal. /drawopdict 100 dict def % ================================ Graphics ================================ % % ---------------- Functions ---------------- % % Note that resolvefunction converts a PDF Function to a PostScript Function; % resolve*fnproc converts a PDF function to a PostScript procedure. % We need to process all required and optional parameters to resolve any % use of indirect references. /fnrdict mark 0 { .resolvefn0 } 2 { .resolvefn2 } 3 { .resolvefn3 } 4 { .resolvefn4 } .dicttomark readonly def /.resolvefn0 { dup length 1 add dict .copydict % make room for DataSource % now resolve any indirect references dup /Size 2 copy knownoget { put } { pop pop } ifelse dup /BitsPerSample 2 copy knownoget { put } { pop pop } ifelse dup /Order 2 copy knownoget { put } { pop pop } ifelse dup /Encode 2 copy knownoget { put } { pop pop } ifelse dup /Decode 2 copy knownoget { put } { pop pop } ifelse % Don't lose our place in PDFfile. PDFfile fileposition exch dup true resolvestream % The stream isn't positionable, so read all the data now. % Stack: filepos fndict stream 1 index /Range get length 2 idiv 2 index /BitsPerSample get mul 2 index /Size get { mul } forall 7 add 8 idiv string 1 index exch readstring pop exch closefile % Stack: filepos fndict data exch dup /DataSource 4 -1 roll put exch PDFfile exch setfileposition } bdef /.resolvefn2 { dup length dict .copydict dup /C0 2 copy knownoget { put } { pop pop } ifelse dup /C1 2 copy knownoget { put } { pop pop } ifelse dup /N 2 copy knownoget { put } { pop pop } ifelse } bdef /.resolvefn3 { dup length dict .copydict dup /Bounds 2 copy knownoget { put } { pop pop } ifelse dup /Encode 2 copy knownoget { put } { pop pop } ifelse dup /Functions 2 copy oget mark exch dup { oforce .resolvefn } forall counttomark -1 roll astore exch pop put } bdef /.resolvefn4 { PDFfile fileposition exch % filepos fndict dup true resolvestream % filepos fndict stream exch dup length dict copy % filepos stream fndict2 dup /Function undef % filepos stream fndict2 exch dup token not { () /rangecheck cvx signalerror } if exch token { /rangecheck cvx signalerror } if % Use .bind to avoid idiom recognition. .bind 1 index /Function 3 -1 roll put exch PDFfile exch setfileposition } bdef /.resolvefn { % .resolvefn dup length dict .copydict dup /Domain 2 copy knownoget { put } { pop pop } ifelse dup /Range 2 copy knownoget { put } { pop pop } ifelse dup /FunctionType oget //fnrdict exch get exec } bdef /resolvefunction { % resolvefunction .resolvefn PDFDEBUG { pdfdict /PDFSTEPcount .knownget { 1 le } { true } ifelse { (%Function: ) print dup === flush } if } if } bdef /resolvefnproc { % resolvefnproc resolvefunction .buildfunction } bdef /resolveidfnproc { % resolveidfnproc dup /Identity eq { pop { } } { resolvefnproc } ifelse } bdef /resolvedefaultfnproc { % resolved'fnproc 1 index /Default eq { exch pop } { pop resolveidfnproc } ifelse } bdef % ---------------- Shadings ---------------- % /shrdict mark /ColorSpace { resolvecolorspace } /Function { dup type /dicttype eq { resolvefunction } { [ exch { oforce resolvefunction } forall ] } ifelse } .dicttomark readonly def /resolveshading { % resolveshading PDFfile fileposition exch mark exch { oforce //shrdict 2 index .knownget { exec } if } forall .dicttomark dup /ShadingType get 4 ge { dup dup true resolvestream % Make a reusable stream so that the shading doesn't % reposition PDFfile at unexpected times. /ReusableStreamDecode filter /DataSource exch put } if exch PDFfile exch setfileposition } bdef /resolvesh { % resolveshading Page /Shading rget { resolveshading } { null }ifelse } bdef % ---------------- Halftones ---------------- % /spotfunctions mark /Round { abs exch abs 2 copy add 1 le { dup mul exch dup mul add 1 exch sub } { 1 sub dup mul exch 1 sub dup mul add 1 sub } ifelse } /Diamond { abs exch abs 2 copy add .75 le { dup mul exch dup mul add 1 exch sub } { 2 copy add 1.23 le { .85 mul add 1 exch sub } { 1 sub dup mul exch 1 sub dup mul add 1 sub } ifelse } ifelse } /Ellipse { abs exch abs 2 copy 3 mul exch 4 mul add 3 sub dup 0 lt { pop dup mul exch .75 div dup mul add 4 div 1 exch sub } { dup 1 gt { pop 1 exch sub dup mul exch 1 exch sub .75 div dup mul add 4 div 1 sub } { .5 exch sub exch pop exch pop } ifelse } ifelse } /EllipseA { dup mul .9 mul exch dup mul add 1 exch sub } /InvertedEllipseA { dup mul .9 mul exch dup mul add 1 sub } /EllipseB { dup 5 mul 8 div mul exch dup mul exch add sqrt 1 exch sub } /EllipseC { dup mul .9 mul exch dup mul add 1 exch sub } /InvertedEllipseC { dup mul .9 mul exch dup mul add 1 sub } /Line { exch pop abs neg } /LineX { pop } /LineY { exch pop } /Square { abs exch abs 2 copy lt { exch } if pop neg } /Cross { abs exch abs 2 copy gt { exch } if pop neg } /Rhomboid { abs exch abs 0.9 mul add 2 div } /DoubleDot { 2 {360 mul sin 2 div exch } repeat add } /InvertedDoubleDot { 2 {360 mul sin 2 div exch } repeat add neg } /SimpleDot { dup mul exch dup mul add 1 exch sub } /InvertedSimpleDot { dup mul exch dup mul add 1 sub } /CosineDot { 180 mul cos exch 180 mul cos add 2 div } /Double { exch 2 div exch 2 { 360 mul sin 2 div exch } repeat add } /InvertedDouble { exch 2 div exch 2 { 360 mul sin 2 div exch } repeat add neg } .dicttomark readonly def /htrdict mark 1 { .resolveht1 } 5 { .resolveht5 } % We don't support types 6, 10, or 16 yet. .dicttomark readonly def /.resolveht1 { mark exch { oforce 1 index /SpotFunction eq { dup type /nametype eq { //spotfunctions exch get } { resolvefnproc } ifelse } { 1 index /TransferFunction eq { resolveidfnproc } if } ifelse } forall .dicttomark } bdef /.resolveht5 { mark exch { oforce dup type /dicttype eq { resolvehalftone } if } forall .dicttomark } bdef /resolvehalftone { % resolvehalftone dup /HalftoneType get dup //htrdict exch .knownget { exch pop exec } { (\n\n **** Unsupported HalftoneType ) pdfformaterror =string cvs pdfformaterror (. ***\n\n) pdfformaterror /resolvehalftone cvx /unregistered signalerror } ifelse } bdef % ---------------- Graphics state management ---------------- % /cmmatrix matrix def drawopdict begin % Graphics state stack /q { q } def /Q { Q } def % Graphics state setting /cm { { //false upath } stopped { pop % discard 'false' (upath failed, probably no currentpoint). //cmmatrix astore concat } { % update the CTM, then uappend. 7 1 roll //cmmatrix astore concat newpath { mark exch uappend } stopped cleartomark } ifelse } def /i { 1 .min setflat } def /J /setlinecap load def /d /setdash load def /j /setlinejoin load def /w /setlinewidth load def /M { 1 .max setmiterlimit } bdef /gs { gs } def end % Each entry in this dictionary is % -proc- /gsbg { /BGDefault load resolvedefaultfnproc setblackgeneration } bdef /gsucr { /UCRDefault load resolvedefaultfnproc setundercolorremoval } bdef /gstr { dup type /arraytype eq { { oforce /TRDefault load resolvedefaultfnproc } forall setcolortransfer } { /TRDefault load resolvedefaultfnproc settransfer } ifelse } bdef /gsparamdict mark /SA { setstrokeadjust } /OP { 1 index /op known not { dup op } if OP } % The PDF 1.3 specification says that the name /Default is only % recognized for {BG,UCR,TR}2. However, PDF 1.3 files produced % by Adobe Acrobat Distiller 4.0 for Windows use the name /Default % with the older keys, so we have to implement this. /BG { 1 index /BG2 known { pop } { gsbg } ifelse } /UCR { 1 index /UCR2 known { pop } { gsucr } ifelse } /TR { 1 index /TR2 known { pop } { gstr } ifelse } /HT { dup /Default eq { pop .setdefaulthalftone } { %****** DOESN'T IMPLEMENT THE STREAM CASE YET ****** resolvehalftone sethalftone } ifelse % the transfer function may dependent on the halftone, so make sure % it is set if included in the graphic state (otherwise this is % subject to order of a dictionary forall, which is unpredictable) dup /TR2 .knownget { dup /Default eq { oforce gsparamdict /TR2 get exec } { pop } ifelse } { dup /TR .knownget { /dup /Default eq { oforce gsparamdict /TR get exec } { pop } ifelse } if } ifelse } /HTP { % HTP may be present even if this isn't a DPS interpreter. /sethalftonephase where { pop aload pop sethalftonephase } { pop } ifelse } % PDF 1.3 /Font { aload pop Tf } /LW { setlinewidth } /LC { setlinecap } /LJ { setlinejoin } /ML { 1 .max setmiterlimit } /D { aload pop setdash } /RI { ri } /op { op } /OPM { OPM } /BG2 { gsbg } /UCR2 { gsucr } /TR2 { gstr } /FL { 1 .min setflat } /SM { % SM may be present even if this is only a Level 2 interpreter. /setsmoothness where { pop setsmoothness } { pop } ifelse } % PDF 1.4 % All of these require the "transparency" feature in the interpreter. /ca { ca } /CA { CA } /SMask { gssmask } /AIS { AIS } /BM { BM } /TK { TK } .dicttomark readonly def /gs { % gs - Page /ExtGState rget { % We keep the dictionary on the stack during the forall so that % keys that interact with each other have access to it. dup { oforce exch gsparamdict exch .knownget { exec } { pop } ifelse } forall pop } if } bdef % ------ Transparency support ------ % /gssmask { dup /None eq PDFusingtransparency not or { pop null } { % Preprocess the SMask value into a parameter dictionary for % .begintransparencymaskgroup, with added /BBox and /Draw keys. mark exch % Stack: mark smaskdict dup /S oget /Subtype exch 3 2 roll % Stack: mark ... smaskdict dup /BC knownoget { dup /Background exch 4 2 roll gsave 1 index /G oget /Group oget /CS knownoget { csresolve dup setgcolorspace csput } if aload pop setcolor [ currentgray ] grestore /GrayBackground exch 3 2 roll } if dup /TR knownoget { resolveidfnproc /TransferFunction exch 3 2 roll } if dup /G oget dup /BBox oget /BBox exch 4 2 roll /.execmaskgroup cvx 2 packedarray cvx /Draw exch 3 2 roll pop .dicttomark } ifelse SMask } bdef % This procedure is called to actually render the soft mask. /.execmaskgroup { % .execmaskgroup - % Save our place in PDFfile, and do a gsave to avoid resetting % the color space. currentcolorspace 4 1 roll PDFfile fileposition 4 1 roll % We have to select the group's color space so that the % background color will be interpreted correctly. dup /Group oget /CS knownoget { csresolve dup setgcolorspace csput } if exch dup /BBox get aload pop .begintransparencymaskgroup { dup /Resources knownoget { oforce } { 0 dict } ifelse exch false resolvestream .execgroup .endtransparencymask } stopped { .discardtransparencymask stop } if PDFfile exch setfileposition setcolorspace } bdef % Paint a Form+Group XObject, either for a transparency mask or for a Do. /.execgroup { % .execgroup - gsave //nodict begin null SMask 1 .setopacityalpha 1 .setshapealpha 0 .inittransparencymask 1 .inittransparencymask /Compatible .setblendmode % Execute the body of the Form, similar to DoForm. pdfopdict .pdfruncontext end grestore } bdef /.beginformgroup { % groupdict bbox .beginformgroup - exch mark exch % bbox mark groupdict dup /CS knownoget { csresolve setgcolorspace } if dup /I knownoget { /Isolated exch 3 2 roll } if dup /K knownoget { /Knockout exch 3 2 roll } if pop .dicttomark % Stack: bbox paramdict exch aload pop .begintransparencygroup } bdef % .paintgroupform implements the Form PaintProc in the case where the % Form XObject dictionary includes a Group key. See .paintform below. /.paintgroupform { % .paintgroupform - dup /Group oget exch /BBox oget % Stack: resdict stream groupdict bbox .beginformgroup { .execgroup } stopped { .discardtransparencygroup stop } if .endtransparencygroup } bdef % Make an ImageType 103 (soft-masked) image. /makesoftmaskimage { % makesoftmaskimage % , updates currentdict = % imagedict % See the ImageType 3 case of makemaskimage below. % SMask is a stream, another Image XObject. % Stack: datasource imagemask(false) smaskstreamdict PDFfile fileposition exch dup /Matte knownoget { /Matte exch def } if dup length dict makeimagedict pop % In order to prevent the two data sources from being % aliased, we need to make at least one a reusable stream. % We pick the mask, since it's smaller (in case we need to % read all its data now). % Stack: datasource imagemask(false) savedpos % maskdict is currentdict /DataSource DataSource mark /Intent 1 /AsyncRead true .dicttomark .reusablestreamdecode def PDFfile exch setfileposition currentdict end currentdict end 5 dict begin /ImageType 103 def /DataDict exch def dup /InterleaveType 3 put DataDict /Matte knownoget { /Matte exch def } if AlphaIsShape { /ShapeMaskDict } { /OpacityMaskDict } ifelse exch def /ColorSpace DataDict /ColorSpace get def } bdef % ---------------- Color setting ---------------- % /01_1 [0 1] readonly def /01_3 [0 1 0 1 0 1] readonly def /01_4 [0 1 0 1 0 1 0 1] readonly def % The keys here are resolved (PostScript, not PDF) color space names. /csncompdict mark /DeviceGray { pop 1 } /DeviceRGB { pop 3 } /DeviceCMYK { pop 4 } /CIEBasedA { pop 1 } /CIEBasedABC { pop 3 } /ICCBased { 1 oget /N oget } /Separation { pop 1 } /DeviceN { 1 oget length } .dicttomark readonly def /csrdict mark /DeviceGray { } /DeviceRGB { } /DeviceCMYK { } /CalGray { 1 oget 6 dict begin dup /Gamma knownoget { /exp load 2 packedarray cvx /DecodeA exch def } if dup /BlackPoint knownoget { /BlackPoint exch def } if dup /WhitePoint knownoget { dup /WhitePoint exch def dup /MatrixA exch def /RangeLMN [ 3 2 roll { 0 exch } forall ] def } if /PDFColorSpace exch def [ /CIEBasedA currentdict end ] } /CalRGB { 1 oget 6 dict begin dup /Gamma knownoget { [ exch { /exp load 2 packedarray cvx } forall ] /DecodeABC exch def } if dup /Matrix knownoget { /MatrixABC exch def } if dup /BlackPoint knownoget { /BlackPoint exch def } if dup /WhitePoint knownoget { /WhitePoint exch def } if /PDFColorSpace exch def [ /CIEBasedABC currentdict end ] } /CalCMYK { pop /DeviceCMYK % not defined by Adobe } /Lab { 1 oget 6 dict begin dup /Range knownoget not { [-100 100 -100 100] } if [0 100 null null null null] dup 2 4 -1 roll putinterval /RangeABC exch def /DecodeABC [{16 add 116 div} bind {500 div} bind {200 div} bind] def /MatrixABC [1 1 1 1 0 0 0 0 -1] def dup /BlackPoint knownoget { /BlackPoint exch def } if dup /WhitePoint knownoget { /WhitePoint exch def } { ( **** Warning: Lab colorspace is missing WhitePoint.\n) pdfformaterror /WhitePoint [0.9505 1 1.089] def } ifelse % scaling function g() for DecodeLMN construction { dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse } /DecodeLMN [ % Store white point implicitly inside procedures. [ 3 index aload pop WhitePoint 0 get /mul .systemvar ] cvx bind [ 4 index aload pop WhitePoint 1 get /mul .systemvar ] cvx bind [ 5 index aload pop WhitePoint 2 get /mul .systemvar ] cvx bind ] def pop /PDFColorSpace exch def [ /CIEBasedABC currentdict end ] } /ICCBased { dup 1 get type /dicttype ne { % don't resolve more than once PDFfile fileposition exch dup dup 1 oget mark exch { oforce } forall .dicttomark dup dup true resolvestream /ReusableStreamDecode filter /DataSource exch put 1 exch put exch PDFfile exch setfileposition % Resolve alternate color space dup 1 get % Get colorspace dictionary dup /Alternate .knownget % Check for alternate color space { oforce resolvecolorspace /Alternate exch put } % resolve and replace { pop } % remove colorspace dictionary ifelse } if } bind /Separation { aload pop exch oforce resolvecolorspace % Contrary to PDF manuals up to v.1.5, Acrobat Distiller 3.01 % can use /Identity name here instead of a function. exch oforce resolveidfnproc 4 array astore } /DeviceN { 0 4 getinterval % ignore attributes aload pop 3 -1 roll oforce % resolve names array [ exch { oforce } forall ] % resolve each of the names 3 -1 roll oforce resolvecolorspace 3 -1 roll oforce resolvefnproc 4 array astore } /Indexed { aload pop 3 -1 roll oforce resolvecolorspace % Stack: /Indexed hival lookup basespace % If the underlying space is a Lab space, we must scale % the output of the lookup table as part of DecodeABC. dup dup type /arraytype eq { 0 get } if /CIEBasedABC eq { dup 1 get /DecodeLMN known { 1 get dup length dict copy begin /DecodeABC [ 0 2 4 { RangeABC 1 index 1 add get RangeABC 2 index get sub /mul load RangeABC 3 index get /add load DecodeABC 6 -1 roll 2 idiv get [ 6 1 roll aload pop ] cvx } for ] def /RangeABC //01_3 def currentdict end /CIEBasedABC exch 2 array astore } if } if 3 1 roll oforce dup type /stringtype ne { % The color lookup table is a stream. % Get its contents. Don't lose our place in PDFfile. % Stack: /Indexed basespace hival lookup PDFfile fileposition 5 1 roll true resolvestream % Stack: filepos /Indexed basespace hival lookupstream 1 index 1 add % Stack: filepos /Indexed basespace hival lookupstream len 3 index dup dup type /arraytype eq { 0 get } if //csncompdict exch get exec mul string readstring pop % Stack: filepos /Indexed basespace hival table 5 -1 roll PDFfile exch setfileposition } if 4 array astore % Replace the PDFColorSpace with the Indexed space if needed. dup 1 get dup type /arraytype eq { dup length 2 ge { dup 1 get type /dicttype eq { dup 1 get /PDFColorSpace known { dup 1 get /PDFColorSpace 3 index put } if } if } if } if pop } /Pattern { dup type /nametype ne { dup length 1 gt { 1 oget resolvecolorspace /Pattern exch 2 array astore } if } if } .dicttomark readonly def /cssubst { % cssubst true % cssubst false dup resolvecolorspace dup 1 index ne { exch pop true } { pop pop false } ifelse } bdef /csnames mark /DeviceGray dup /DeviceRGB dup /DeviceCMYK dup /Pattern dup .dicttomark readonly def /csresolve { % csresolve dup type /nametype ne { (\n **** Warning: CS/cs (setcolorspace) operand not a name: ) pdfformaterror dup stderrfile dup 3 -1 roll write==only flushfile ( ****\n) pdfformaterror dup type /arraytype eq { % Adobe InDesign + PDF Library has array resolvecolorspace } if } { dup Page /ColorSpace rget { exch pop resolvecolorspace } { //csnames 1 index known not { /undefined cvx signalerror } if } ifelse } ifelse } bdef /resolvecolorspace { % resolvecolorspace dup dup type /arraytype eq { 0 get } if //csrdict exch .knownget { exec dup type /nametype ne { dup length 1 eq { 0 get } if } if } { dup type /nametype eq { csresolve } { csset exch pop } ifelse } ifelse } bdef /scresolve { % ... scresolve % We can't really make sc[n] and SC[N] work, because % the color space information isn't available at % conversion time; so we hack it by assuming that % all the operands on the stack are used, and that % if the top operand is a name, it's a Pattern resource. dup type /nametype eq { Page /Pattern rget { resolvepattern } { null } ifelse } if dup type /dicttype eq { % Check the PaintType, if any (shading patterns don't % have one). dup /PaintType knownoget { 2 eq } { false } ifelse } { .pdfcount 1 gt } ifelse } bdef /.pdfpaintproc { % .pdfpaintproc - PDFDEBUG { pdfdict /PDFSTEPcount .knownget { 1 le } { true } ifelse { (%Begin PaintProc) print dup === flush } if } if % For uncolored patterns, we have to unbind the current % color and color space before running the PaintProc. % There's no harm in doing this for colored patterns, % so for simplicity, we always do it. PDFfile fileposition 3 1 roll q null sc1 null SC1 % save old value of pdfemptycount on opstack, set to new value pdfemptycount /pdfemptycount count 3 sub def 3 1 roll exch false resolvestream pdfopdict .pdfruncontext % restore pdfemptycount /pdfemptycount exch def Q PDFDEBUG { pdfdict /PDFSTEPcount .knownget { 1 le } { true } ifelse { (%End PaintProc) print dup === flush } if } if PDFfile exch setfileposition } bdef /resolvepattern { % resolvepattern % Don't do the resolvestream now: just capture the data % from the file if necessary. dup length dict copy dup /FilePosition .knownget { 1 index /File get dup fileposition 3 1 roll % Stack: dict savepos pos file dup 3 -1 roll setfileposition dup 3 index /Length oget dup 65535 le { string readstring pop } { () /SubFileDecode filter /ReusableStreamDecode filter } ifelse % Stack: dict savepos file string 3 1 roll exch setfileposition 1 index /File 3 -1 roll put dup /FilePosition undef } if dup /Shading knownoget { resolveshading 1 index /Shading 3 -1 roll put } if dup /PaintProc [ % Bind the resource dictionary into the PaintProc. 2 index /Resources knownoget { oforce } { 0 dict } ifelse /.pdfpaintproc cvx ] cvx put PDFDEBUG { pdfdict /PDFSTEPcount .knownget { 1 le } { true } ifelse { (%Pattern: ) print dup === flush } if } if } bdef drawopdict begin /g { /DeviceGray cssubst { cs sc1 } { g } ifelse } bdef /rg { /DeviceRGB cssubst { cs sc* } { rg } ifelse } bdef /k { k } bdef /cs { csresolve cs } bdef /sc { scresolve { sc* } { sc1 } ifelse } bdef /scn /sc load def /G { /DeviceGray cssubst { CS SC1 } { G } ifelse } bdef /RG { /DeviceRGB cssubst { CS SC* } { RG } ifelse } bdef /K { K } bdef /CS { csresolve CS } bdef /ri { ri } bdef /SC { scresolve { SC* } { SC1 } ifelse } bdef /SCN /SC load def end % ---------------- Paths ---------------- % drawopdict begin % Path construction /m /moveto load def /l /lineto load def /c /curveto load def /v { currentpoint 6 2 roll curveto } def /y { 2 copy curveto } def /re { 4 2 roll moveto exch dup 0 rlineto 0 3 -1 roll rlineto neg 0 rlineto closepath } def /h /closepath load def % Path painting and clipping /n { n } def /S { S } def /s { s } def /f { f } def /f* { f* } def /B { B } def /b { b } def /B* { B* } def /b* { b* } def /W { W } def /W* { W* } def /sh { setfillstate resolvesh shfill } def end % ---------------- XObjects ---------------- % /xobjectprocs mark % -proc- - /Image { DoImage } /Form { DoForm } /PS { DoPS } .dicttomark readonly def % Note that the keys in defaultdecodedict are resolved (PostScript, not PDF) % color space names. /defaultdecodedict mark /DeviceGray { pop //01_1 } bind /DeviceRGB { pop //01_3 } bind /DeviceCMYK { pop //01_4 } bind /CIEBasedA { 1 get /RangeA knownoget not { //01_1 } if } bind /CIEBasedABC { 1 get /RangeABC knownoget not { //01_3 } if } bind /ICCBased { 1 oget dup /Range knownoget { exch pop }{ /N get [ exch {0 1} repeat ] readonly } ifelse } bind /Separation { pop //01_1 } bind /DeviceN { 1 oget length [ exch {0 1} repeat ] readonly } bind /Indexed { pop [ 0 1 BitsPerComponent bitshift 1 sub ] } bind .dicttomark readonly def /checkaltimage { % checkaltimage Printed { dup /Alternates knownoget { { dup /DefaultForPrinting knownoget { { /Image oget exch pop exit } { pop } ifelse } { pop } ifelse } forall } if } if } bdef /makeimagedict { % makeimagedict % On return, newdict' is currentdict begin /Width 2 copy oget def /Height 2 copy oget def % Handle missing BitsPerComponent later. /BitsPerComponent 2 copy knownoget { def } { pop } ifelse /Interpolate 2 copy knownoget { def } { pop } ifelse makeimagekeys } bdef /makeimagekeys { % makeimagekeys % newdict is currentdict % Assumes Width, Height, BPC, Interpolate already copied. /ImageType 1 def /ImageMatrix Width 0 0 % Handle 0-height images specially. Height dup 0 eq { pop 1 } if neg 0 1 index neg 6 array astore def dup /ImageMask knownoget dup { and } if { % Image mask % Decode is required for the PostScript image operators. % AI8 writes bogus decode array [0 1 0 0 0 0 0 0] /Decode 2 copy knownoget { 0 2 getinterval } { //01_1 } ifelse def % BitsPerComponent is optional for masks. /BitsPerComponent 2 copy known { pop } { 1 def } ifelse true } { % Opaque image dup /ColorSpace oget resolvecolorspace /ColorSpace exch def % Decode is required for the PostScript image operators. /Decode 2 copy knownoget not { ColorSpace //defaultdecodedict ColorSpace dup type /arraytype eq { 0 get } if get exec } if def false } ifelse % Even though we're going to read data, % pass false to resolvestream so that % it doesn't try to use Length (which may not be present). exch false resolvestream /DataSource exch def } bdef /DoImage { checkaltimage dup length 6 add dict 1 index /SMask knownoget { 1 index exch /SMask exch put } if 1 index /Mask knownoget { 1 index exch /Mask exch put } if makeimagedict doimagesmask } bdef /makemaskimage { % makemaskimage % , updates currentdict = % imagedict dup type /arraytype eq { /ImageType 4 def % Check that every element of the Mask is an integer. //false 1 index { type /integertype ne or } forall { (\n **** Warning: Some elements of Mask array are not integers.\n) pdfformaterror [ exch { 0.5 add cvi } forall ] % following AR4, 5, 6 implementation } if % Check elements of array are within 0::(2**BitsPerComponent)-1 % This is a PostScript error, but AR ignores Mask in that case 2 BitsPerComponent exp cvi 1 sub //false 2 index { % stack: max_value result_bool value dup 0 lt exch 3 index gt or or } forall exch pop { (\n **** Warning: Some elements of Mask array are out of range.\n) pdfformaterror pop /ImageType 1 def % revert to non-masked image } { /MaskColor exch def } ifelse } { % Mask is a stream, another Image XObject. % Stack: datasource imagemask(false) maskstreamdict PDFfile fileposition exch dup length dict makeimagedict pop % In order to prevent the two data sources from being % aliased, we need to make at least one a reusable stream. % We pick the mask, since it's smaller (in case we need to % read all its data now). % Stack: datasource imagemask(false) savedpos % maskdict is currentdict /DataSource DataSource mark /Intent 1 /AsyncRead true .dicttomark .reusablestreamdecode def PDFfile exch setfileposition currentdict end currentdict end 5 dict begin /ImageType 3 def /InterleaveType 3 def /DataDict exch def /MaskDict exch def /ColorSpace DataDict /ColorSpace get def } ifelse } bdef /doimagesmask { % doimagesmask - PDFusingtransparency { currentdict /SMask knownoget } { false } ifelse { .begintransparencymaskimage PDFfile fileposition exch gsave //nodict begin null /SoftMask gput 1 .setopacityalpha 1 .setshapealpha 0 .inittransparencymask 1 .inittransparencymask /Compatible .setblendmode DoImage end grestore PDFfile exch setfileposition 0 .endtransparencymask << /Subtype /Group /Isolated true >> 0 0 1 1 .begintransparencygroup doimage .endtransparencygroup } { doimage } ifelse } bdef /doimage { % doimage - % imagedict is currentdict, gets popped from dstack DataSource exch PDFusingtransparency { currentdict /SMask knownoget } { false } ifelse { makesoftmaskimage } { currentdict /Mask knownoget { makemaskimage } if } ifelse % Stack: datasource imagemask % image and imagemask can be redefined in gs_init.ps to tweak interpolation % after device-specific files are run. Don't bind them here. { currentdict end setfillstate /imagemask } { ColorSpace setgcolorspace currentdict end setfillblend /image } ifelse .systemvar stopped { pop $error /errorname get dup /ioerror eq { pop (\n **** Warning: File has insufficient data for an image.\n) pdfformaterror } { (\n **** Warning: File encountered ') exch 40 string cvs concatstrings (' error while processing an image.\n) concatstrings pdfformaterror } ifelse } if % Close the input stream, unless it is PDFfile or % PDFsource. dup dup PDFfile eq exch PDFsource eq or { pop } { closefile } ifelse } bdef /.paintform { % .paintform - 3 -1 roll dup /Group known PDFusingtransparency and { .paintgroupform } { pop pdfopdict .pdfruncontext } ifelse } bdef /DoForm { % Adobe 2nd edition of the PDF 1.3 spec makes /FormType % and /Matrix keys optional. Cope with the missing keys. begin << currentdict /FormType known not { /FormType 1 } if currentdict /Matrix known not { /Matrix { 1 0 0 1 0 0 } cvlit } if currentdict end { oforce } forall >> dup [ 2 index /Resources knownoget { oforce } { 0 dict } ifelse 3 index false /resolvestream cvx /.paintform cvx ] cvx /PaintProc exch put % Adjust pdfemptycount since we have an extra dictionary on the stack pdfemptycount exch /pdfemptycount where pop count 2 sub /pdfemptycount exch put q execform Q % gsave / grestore around the Form % Restore pdfemptycount /pdfemptycount where pop exch /pdfemptycount exch put } bdef /_dops_save 1 array def /DoPS { DOPS { //_dops_save 0 save put true resolvestream cvx exec //_dops_save 0 get restore } { pop } ifelse } bdef currentdict /_dops_save undef drawopdict begin /Do { setfillblend PDFfile fileposition exch dup Page /XObject rget { exch pop dup /Subtype get xobjectprocs exch get % Don't leave extra objects on the stack while executing % the definition of the form. 3 -1 roll 2 .execn } { % This should cause an error, but Acrobat Reader can % continue, so we do too. ( **** Undefined XObject resource: ) exch =string cvs concatstrings (\n) concatstrings pdfformaterror } ifelse PDFfile exch setfileposition } bdef end % ---------------- In-line images ---------------- % % Undo the abbreviations in an in-line image dictionary. % Note that we must look inside array values. % /I is context-dependent. /unabbrevkeydict mark /BPC /BitsPerComponent /CS /ColorSpace /D /Decode /DP /DecodeParms /F /Filter /H /Height /I /Interpolate /IM /ImageMask /W /Width .dicttomark readonly def /unabbrevvaluedict mark /AHx /ASCIIHexDecode /A85 /ASCII85Decode /CC /CalCMYK /CCF /CCITTFaxDecode /CG /CalGray /CR /CalRGB /DCT /DCTDecode /CMYK /DeviceCMYK /Fl /FlateDecode /G /DeviceGray /RGB /DeviceRGB /I /Indexed /LZW /LZWDecode /RL /RunLengthDecode .dicttomark readonly def /unabbrevtypedict mark /nametype { //unabbrevvaluedict 1 index .knownget { exch pop } if } /arraytype { dup 0 1 2 index length 1 sub { 2 copy get unabbrevvalue put dup } for pop } .dicttomark readonly def /unabbrevvalue { % unabbrevvalue oforce //unabbrevtypedict 1 index type .knownget { exec } if } bdef drawopdict begin /BI { mark } bdef /ID { counttomark 2 idiv dup 7 add dict begin { exch //unabbrevkeydict 1 index .knownget { exch pop } if exch unabbrevvalue def } repeat pop /IDFlag true def % flag for stream processing. /File PDFsource def currentdict makeimagekeys doimage % The Adobe documentation says that the data following ID % consists of "lines", and some PDF files (specifically, some files % produced by PCL2PDF from Visual Software) contain garbage bytes % between the last byte of valid data and an EOL. % Some files (PDFOUT v3.8d by GenText) have EI immediately following % the stream. Some have no EOL and garbage bytes. % Therefore, we skip all bytes before EI or EOL 0 { PDFsource read not { //true exit } if dup 10 eq 1 index 13 eq or { pop PDFsource token pop /EI ne exit } if exch 69 eq 1 index 73 eq and { //false exit } if % 'EI' } loop exch pop { /ID cvx /syntaxerror signalerror } if } bdef end % ================================ Text ================================ % drawopdict begin % Text control /BT { BT } def /ET { ET } def /Tc { Tc } def /TL { TL } def /Tr { Tr } def /Ts { Ts } def /Tw { Tw } def /Tz { Tz } def % Text positioning /Td { Td } def /TD { TD } def /Tm { Tm } def /T* { T* } def % Text painting /Tj { Tj } def /' { ' } def /" { " } def /TJ { TJ } def end % ============================== Annotations ============================== % % Get and normalize an annotation's rectangle. /annotrect { % annotrect /Rect get aload pop exch 3 index sub dup 0 lt { dup 5 -1 roll add 4 1 roll neg } if exch 2 index sub dup 0 lt { dup 4 -1 roll add 3 1 roll neg } if } bdef % Set an annotation color. /annotsetcolor { % annotsetcolor - /C knownoget { aload pop setrgbcolor } { 0 setgray } ifelse } bdef % Draw the border. Currently, we ignore requests for beveling, and we % don't round the corners of rectangles. /strokeborder { % strokeborder - 1 index 0 ne { % do not draw if border width is 0 gsave 2 index annotsetcolor 0 setdash dup setlinewidth exch annotrect 2 { 4 index sub 4 1 roll } repeat 2 { 4 index 0.5 mul add 4 1 roll } repeat rectstroke pop grestore } { pop pop pop } ifelse } bdef % Draw an annotation border. /drawborder { % drawborder - gsave dup /BS knownoget { dup /W knownoget not { 1 } if [] 2 index /S knownoget { /D eq { 2 index /D knownoget not { [3] } if exch pop } if } if 3 -1 roll pop strokeborder } { dup /Border knownoget { dup 2 get exch dup length 3 gt { 3 get } { pop [] } ifelse strokeborder } { 1 [] strokeborder } ifelse } ifelse grestore } bdef % % The PDF annotation F (flags) integer is bit encoded. % Bit 1 (LSB) Invisible: 1 --> Do not display if no handler. % Note: We have no handlers but we ignore this bit. % Bit 2 Hidden: 1 --> Do not display. We will not display if this bit is set. % Bit 3 Print: 1 --> Display if printing. We will display if this bit set % (and not hidden) and Printed is true % Bit 4 NoZoom: 1 --> Do not zoom annotation even if image is zoomed. % Bit 5 NoRotate: 1 --> Do not rotate annotation even if image is rotated. % Bit 6 NoView: 0 --> Display if this is a 'viewer'. We will display % if this bit is not set (and not hidden) and Printed is false % Bit 7 Read Only - 1 --> No interaction. We ignore this bit % /annotvisible { % annotvisible /F knownoget not { 0 } if % Get flag value dup 2 and 0 eq % Check hidden flag exch dup 4 and 0 ne Printed and % Check print flag exch 32 and 0 eq Printed not and % Check noview flag or % Combine print and view and % Combine with 'hidden' flag test } bdef /drawwidget { % drawwidget - dup /AP knownoget { false [/N /R /D] { % stack: scale annot appearance false key dup 3 index exch known { exch pop true exit } if pop } forall % stack: scale annot appearance key true % stack: scale annot appearance false dup { pop oget % Acrobat Distiller produces files in which this Form % XObject lacks Type and Subtype keys. This is illegal, % but Acrobat Reader accepts it. The only way we can % tell whether this is a Form or a set of sub-appearances % is by testing for the stream Length key. dup /Length known { % If this is a form then simply use it true } { 1 index /AS knownoget not { % If we do not have AS then use any appearance { exch pop oforce exit } forall true } { % Stack: annot Ndict AS % Get the specified appearance. If no appearance, then % display nothing - set stack = false. knownoget } ifelse } ifelse } { exch pop % discard useless AP dictionary } ifelse % Stack: scale annot appearance true % Stack: scale annot false { % Draw appearance % Initialize graphic following "7.4.4 Appearance Streams" q graphicsbeginpage textbeginpage 1 index annotrect pop pop translate 2 index dup scale % Apply scale factor DoForm Q } if } if pop pop } bdef % For stamp object we have to determine the size of the output rectangle % and the size of the BBox for the stamp image. From these we calculate % a scale factor for drawing the stamp. /calcstampscale { % calcstampscale scale dup /Rect known { dup annotrect 4 -2 roll pop pop % get width height size in user space 3 -1 roll /AP knownoget { /N knownoget { dup /Matrix knownoget { % transform /Annot /Rect xwidth to Form space 4 -2 roll 3 -1 roll dtransform 3 -1 roll } if /BBox knownoget { exch pop % discard y height aload pop pop exch pop sub % BBox width dup 0 eq { ( **** Warning: /BBox has zero width which is not allowed.\n) pdfformaterror pop pop 1 1 % 0 width -- revert to unity scaling } if div % scale x widths dup 0 lt { neg } if % get magnitude } { pop pop 1 % default to unity scaling } ifelse % if we have /BBox } { pop pop 1 } ifelse % if we have /N } { pop pop 1 } ifelse % if we have /AP } { ( **** Warning: /Annot dict is missing required /Rect entry.\n) pdfformaterror pop 1 } ifelse } bdef /drawlink { % drawlink - dup drawborder dup calcstampscale exch drawwidget } bdef % Draw an annotation. /drawannottypes mark /Link { drawlink } bind .dicttomark readonly def /drawannot { % drawannot - dup annotvisible { gsave dup dup /Subtype get //drawannottypes exch .knownget { exec } { dup calcstampscale exch drawwidget % Use drawwidget for everything else } ifelse % type known grestore } if pop % annotvisible } bdef currentdict /drawannottypes undef end % pdfdict end % GS_PDF_ProcSet .setglobal