% Copyright (C) 1994, 2000 Aladdin Enterprises. All rights reserved. % % This program is free software; you can redistribute it and/or modify it % under the terms of the GNU General Public License as published by the % Free Software Foundation; either version 2 of the License, or (at your % option) any later version. % % This program is distributed in the hope that it will be useful, but % WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General % Public License for more details. % % You should have received a copy of the GNU General Public License along % with this program; if not, write to the Free Software Foundation, Inc., % 59 Temple Place, Suite 330, Boston, MA, 02111-1307. % $Id: pdf_draw.ps,v 1.36.2.2.2.1 2003/04/12 14:02:39 giles 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. /fnrdict mark 0 { .resolvefn0 } 2 { } 3 { .resolvefn3 } 4 { .resolvefn4 } .dicttomark readonly def /.resolvefn0 { % 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 oget length 2 idiv 2 index /BitsPerSample oget mul 2 index /Size oget { mul } forall 7 add 8 idiv string 1 index exch readstring pop exch closefile % Stack: filepos fndict data exch dup length 1 add dict .copydict dup /DataSource 4 -1 roll put exch PDFfile exch setfileposition } 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 currentdict /tfopdict undef /.resolvefn { % .resolvefn dup /FunctionType oget //fnrdict exch get exec } bdef /resolvefunction { % resolvefunction .resolvefn DEBUG { (%Function: ) print dup === flush } 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 //htrdict exch get exec } bdef % ---------------- Graphics state management ---------------- % /cmmatrix matrix def drawopdict begin % Graphics state stack /q { q } def /Q { Q } def % Graphics state setting /cm { //cmmatrix astore concat } def /i /setflat load def /J /setlinecap load def /d /setdash load def /j /setlinejoin load def /w /setlinewidth load def /M /setmiterlimit load def /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 .setdefaultscreen } { %****** DOESN'T IMPLEMENT THE STREAM CASE YET ****** resolvehalftone sethalftone } 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 { setmiterlimit } /D { aload pop setdash } /RI { ri } /op { op } /OPM { OPM } /BG2 { gsbg } /UCR2 { gsucr } /TR2 { gstr } /FL { 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 { pop null } { % Preprocess the SMask value into a parameter dictionary for % .begintransparencymask, 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 { /Background 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. gsave 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 setcolorspace } if exch dup /BBox get aload pop .begintransparencymask { dup /Resources knownoget { oforce } { 0 dict } ifelse exch false resolvestream .execgroup .endtransparencymask } .internalstopped { .discardtransparencymask stop } if PDFfile exch setfileposition grestore } bdef % Paint a Form+Group XObject, either for a transparency mask or for a Do. /.execgroup { % .execgroup - gsave 1 .setopacityalpha 1 .setshapealpha 0 .inittransparencymask 1 .inittransparencymask /Compatible .setblendmode % Execute the body of the Form, similar to DoForm. pdfopdict .pdfruncontext grestore } bdef /.beginformgroup { % groupdict bbox .beginformgroup - exch mark exch % bbox mark groupdict dup /CS knownoget { csresolve setcolorspace } 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 } .internalstopped { .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 .knownget { /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 % Perhaps some of the values in the following need to be modified % depending on the WhitePoint value.... /cslabinit mark /DecodeABC [{16 add 116 div} bind {500 div} bind {200 div} bind] /MatrixABC [1 1 1 1 0 0 0 0 -1] /DecodeLMN [ {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 0.9505 mul} bind {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse } bind {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 1.0890 mul} bind ] .dicttomark readonly def /csrdict mark /DeviceGray { /DefaultGray Page /ColorSpace rget { exch pop resolvecolorspace } if } /DeviceRGB { /DefaultRGB Page /ColorSpace rget { exch pop resolvecolorspace } if } /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 { /WhitePoint exch def } if pop [ /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 pop [ /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 //cslabinit { def } forall dup /BlackPoint knownoget { /BlackPoint exch def } if dup /WhitePoint knownoget { /WhitePoint exch def } if pop [ /CIEBasedABC currentdict end ] } /ICCBased { 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 } bind /Separation { aload pop exch oforce resolvecolorspace exch oforce resolvefnproc 4 array astore } /DeviceN { 0 4 getinterval % ignore attributes aload pop 3 -1 roll oforce 3 -1 roll oforce resolvecolorspace 3 -1 roll oforce resolvefnproc 4 array astore } /Indexed { aload pop 3 -1 roll oforce resolvecolorspace % 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 } /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 Page /ColorSpace rget { exch pop resolvecolorspace } { //csnames 1 index known not { /undefined cvx signalerror } if } 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 } { csresolve } 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 .knownget { 2 eq } { false } ifelse } { .pdfcount 1 gt } ifelse } bdef /.pdfpaintproc { % .pdfpaintproc - DEBUG { (%Begin PaintProc) = flush } 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 exch false resolvestream pdfopdict .pdfruncontext Q DEBUG { (%End PaintProc) = flush } 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 string readstring pop % 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 DEBUG { (%Pattern: ) print dup === flush } 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 { 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 .knownget not { //01_1 } if } bind /CIEBasedABC { 1 get /RangeABC .knownget not { //01_3 } if } bind /ICCBased { 1 oget dup /Range .knownget { 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 /BitsPerComponent 2 copy oget def /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 may be missing for masks. % The spec requires it, but some producers omit it, and % Acrobat Reader doesn't care. /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 doimage } bdef /makemaskimage { % makemaskimage % , updates currentdict = % imagedict dup type /arraytype eq { /ImageType 4 def /MaskColor exch def } { % 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 /doimage { % doimage - % imagedict is currentdict, gets popped from dstack DataSource exch PDFversion 1.4 ge { 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 setcolorspace currentdict end setfillblend /image } ifelse .systemvar exec % 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 { .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. dup length 1 index /Matrix known { dict } { 1 add dict dup /Matrix { 1 0 0 1 0 0 } cvlit put } ifelse copy dup /FormType known not { dup length 1 add dict copy dup /FormType 1 put } if dup [ 2 index /Resources knownoget { oforce } { 0 dict } ifelse 3 index false /resolvestream cvx /.paintform cvx ] cvx /PaintProc exch put execform } bdef /DoPS { true resolvestream cvx exec } bdef 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. (%stderr) (w) file dup (****************Undefined XObject resource: ) writestring dup 3 -1 roll write=== flushfile } 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 6 add dict begin { exch //unabbrevkeydict 1 index .knownget { exch pop } if exch unabbrevvalue def } repeat pop /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 64 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 { % Always use the Normal appearance. /N 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 % Stack: scale annot appearance true % Stack: scale annot false { % Draw appearance 1 index annotrect pop pop translate 2 index dup scale % Apply scale factor DoForm } 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 annotrect 4 -2 roll pop pop pop % get x width dup 0 lt { neg } if % get magnitude exch /AP knownoget { /N knownoget { /BBox knownoget { aload pop 4 -2 roll pop pop pop div } { pop 1 % default to unity scaling } ifelse % if we have /BBox } { pop 1 } ifelse % if we have /N } { pop 1 } ifelse % if we have /AP } bdef /drawlink { % drawlink - dup drawborder 1 exch drawwidget } bdef % Draw an annotation. /drawannottypes mark /Link { drawlink } bind /Stamp { dup calcstampscale exch drawwidget } bind .dicttomark readonly def /drawannot { % drawannot - dup annotvisible { gsave dup dup /Subtype get //drawannottypes exch .knownget { exec } { 1 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