Edit File: gs_lev2.ps
% Copyright (C) 2001-2018 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. % % Initialization file for Level 2 functions. % When this is run, systemdict is still writable, % but (almost) everything defined here goes into level2dict. level2dict begin % ------ System and user parameters ------ % % User parameters must obey save/restore, and must also be maintained % per-context. We implement the former, and some of the latter, here % with PostScript code. NOTE: our implementation assumes that user % parameters change only as a result of setuserparams -- that there are % no user parameters that are ever changed dynamically by the interpreter % (although the interpreter may adjust the value presented to setuserparams) % % There are two types of user parameters: those which are actually % maintained in the interpreter, and those which exist only at the % PostScript level. We maintain the current state of both types in % a read-only local dictionary named userparams, defined in systemdict. % In a multi-context system, each context has its own copy of this % dictionary. In addition, there is a constant dictionary named % psuserparams where each key is the name of a user parameter that exists % only in PostScript and the value is a procedure to check that the value % is legal: setuserparams uses this for checking the values. % setuserparams updates userparams explicitly, in addition to setting % any user parameters in the interpreter; thus we can use userparams % to reset those parameters after a restore or a context switch. % NOTE: the name userparams is known to the interpreter, and in fact % the interpreter creates the userparams dictionary. % Check parameters that are managed at the PostScript level. /.checkparamtype { % <newvalue> <type> .checkparamtype <bool> exch type eq } .bind def /.checksetparams { % <newdict> <opname> <checkdict> % .checksetparams <newdict> 2 .argindex { % Stack: newdict opname checkdict key newvalue 3 copy 3 1 roll .knownget { exec not { pop pop pop load /typecheck signalerror } if dup type /stringtype eq { dup rcheck not { pop pop pop load /invalidaccess signalerror } if } if } { pop } ifelse pop pop } forall pop pop } .bind def % currentuser/systemparams creates and returns a dictionary in the % current VM. The easiest way to make this work is to copy any composite % PostScript-level parameters to global VM. Currently we have strings % as well as arrays. For arrays, we also need to copy any contents that % are in VM. Also copying string parameters insures the contents won't % be changed. Also be careful to preserve 'executable' state. /.copyparam { % <value> .copyparam <value'> dup type /arraytype eq { .currentglobal //true .setglobal exch dup wcheck exch dup xcheck exch % original attributes dup length array exch dup { % stack: destination_array original_array original_array dup type /arraytype eq { dup 2 index ne { % avoid recursion .copyparam % recurse to handle composite array elements } { % this array self referenced, do it again (yuk!) pop 1 index % get copy of destination array } ifelse } { dup type /stringtype eq { .copyparam } if } ifelse 3 1 roll % keep arrays on top } forall pop astore exch { cvx } if % set executable state exch not { readonly } if % set readonly attribute as original exch .setglobal } if dup type /stringtype eq { dup wcheck exch % save attr for setting readonly .currentglobal //true .setglobal 1 index length string exch .setglobal copy exch not { readonly } if } if } .bind odef % Some user parameters are managed entirely at the PostScript level. % We take care of that here. systemdict begin /psuserparams 48 dict def /getuserparam { % <name> getuserparam <value> /userparams .systemvar 1 .argindex get exch pop } odef % Fill in userparams (created by the interpreter) with current values. mark .currentuserparams counttomark 2 idiv { userparams 3 1 roll put } repeat pop /.definepsuserparam { % <name> <value> .definepsuserparam - psuserparams 3 copy pop type cvlit //.checkparamtype /exec load 3 packedarray cvx put userparams 3 1 roll put } .bind def end /currentuserparams { % - currentuserparams <dict> /userparams .systemvar dup length dict .copydict } odef % We break out setuserparams into a separate procedure so that setvmxxx % can use it without affecting the command in case of an error. /.setuserparams2 { % Check that we will be able to set the PostScript-level % user parameters. /setuserparams /psuserparams .systemvar //.checksetparams exec % Set the C-level user params. If this succeeds, we know that % the password check succeeded. dup .setuserparams % Now set the PostScript-level params. % The interpreter may have adjusted the values of some of the % parameters, so we have to read them back. dup { /userparams .systemvar 2 index known { psuserparams 2 index known not { pop dup .getuserparam } if .copyparam % special protection for the security related parameters [ /PermitFileReading /PermitFileWriting /PermitFileControl ] { 2 index eq { % force all strings to readonly but make sure the % array is in the correct VM space (local/global). currentglobal exch dup gcheck setglobal dup length array exch { readonly exch } forall astore exch setglobal } if } forall % protect top level of parameters that we copied dup type dup /arraytype eq exch /stringtype eq or { readonly } if /userparams .systemvar 3 1 roll .forceput % userparams is read-only } executeonly { pop pop } ifelse } executeonly forall % A context switch might have occurred during the above loop, % causing the interpreter-level parameters to be reset. % Set them again to the new values. From here on, we are safe, % since a context switch will consult userparams. .setuserparams } .bind executeonly odef % must be bound and hidden for .forceput /setuserparams { % <dict> setuserparams - {.setuserparams2} stopped {/setuserparams load $error /errorname get signalerror} if } .bind odef % Initialize user parameters managed here. /JobName () .definepsuserparam % Restore must restore the user parameters. % (Since userparams is in local VM, save takes care of saving them.) /restore { % <save> restore - //restore /userparams .systemvar .setuserparams } .bind odef % The pssystemparams dictionary holds some system parameters that % are managed entirely at the PostScript level. systemdict begin currentdict /pssystemparams known not { /pssystemparams 40 dict readonly def } if /getsystemparam { % <name> getsystemparam <value> //pssystemparams 1 .argindex .knownget { exch pop } { .getsystemparam } ifelse } odef end /currentsystemparams { % - currentsystemparams <dict> mark .currentsystemparams //pssystemparams { } forall .dicttomark } odef /setsystemparams { % <dict> setsystemparams - % Check that we will be able to set the PostScript-level % system parameters. dup pop % check # of args /SAFETY .systemvar /safe get { % SAFER mode disallows some changes [ /GenericResourceDir /FontResourceDir /GenericResourcePathSep ] { 2 copy .knownget { exch //pssystemparams exch .knownget { ne { /setsystemparams /invalidaccess signalerror } if } { pop } ifelse } { pop } ifelse } forall } if /setsystemparams //pssystemparams mark exch { type cvlit //.checkparamtype /exec load 3 packedarray cvx } forall .dicttomark //.checksetparams exec % Set the C-level system params. If this succeeds, we know that % the password check succeeded. dup .setsystemparams % Now set the PostScript-level params. We must copy local strings % into global VM. dup { //pssystemparams 2 index known { % Stack: key newvalue .copyparam % protect top level parameters that we copied dup type dup /arraytype eq exch /stringtype eq or { readonly } if //pssystemparams 3 1 roll .forceput % pssystemparams is read-only } executeonly { pop pop } ifelse } executeonly forall pop } .bind executeonly odef % Initialize the passwords. % NOTE: the names StartJobPassword and SystemParamsPassword are known to % the interpreter, and must be bound to noaccess strings. % The length of these strings must be max_password (iutil2.h) + 1. /StartJobPassword 65 string noaccess def /SystemParamsPassword 65 string noaccess def % Redefine cache parameter setting to interact properly with userparams. /setcachelimit { { mark /MaxFontItem 2 .argindex .dicttomark setuserparams pop } stopped { /setcachelimit .systemvar $error /errorname get signalerror } if } .bind odef /setcacheparams { % The MaxFontCache parameter is a system parameter, which we might % not be able to set. Fortunately, this doesn't matter, because % system parameters don't have to be synchronized between this code % and the VM. counttomark 1 add copy setcacheparams currentcacheparams % mark size lower upper 3 -1 roll pop /MinFontCompress 3 1 roll /MaxFontItem exch .dicttomark { setuserparams cleartomark } stopped { /setcacheparams .systemvar $error /errorname get signalerror } if } .bind odef % Add bogus user and system parameters to satisfy badly written PostScript % programs that incorrectly assume the existence of all the parameters % listed in Appendix C of the Red Book. Note that some of these may become % real parameters later: code near the end of gs_init.ps takes care of % removing any such parameters from ps{user,system}params. % psuserparams /MaxFormItem 100000 .definepsuserparam /MaxPatternItem 20000 .definepsuserparam /MaxScreenItem 48000 .definepsuserparam /MaxUPathItem 0 .definepsuserparam % File Access Permission parameters .currentglobal //true .setglobal /.checkFilePermitparams { type /arraytype eq { currentuserparams /LockFilePermissions get { 5 { pop } repeat /setuserparams /invalidaccess signalerror }{ % in addition to validating the value, ensure the value is read/only dup { readonly exch } forall .currentglobal exch dup gcheck .setglobal length array exch .setglobal astore readonly } ifelse } { 5 { pop } repeat /setuserparams /typecheck signalerror } ifelse //true } .bind def % Initialize the File Permission access control to wide open % These will only be accessed via current/set userparams. % Values are a string containing multiple nul terminated path strings /PermitFileReading dup [ (*) ] .definepsuserparam psuserparams exch /.checkFilePermitparams load put /PermitFileWriting dup [ (*) ] .definepsuserparam psuserparams exch /.checkFilePermitparams load put /PermitFileControl dup [ (*) ] .definepsuserparam psuserparams exch /.checkFilePermitparams load put .setglobal pssystemparams begin /CurDisplayList 0 .forcedef /CurFormCache 0 .forcedef /CurInputDevice () .forcedef /CurOutlineCache 0 .forcedef /CurOutputDevice () .forcedef /CurPatternCache 0 .forcedef /CurUPathCache 0 .forcedef /CurScreenStorage 0 .forcedef /CurSourceList 0 .forcedef /DoPrintErrors //false .forcedef /JobTimeout 0 .forcedef /LicenseID (LN-001) .forcedef % bogus /MaxDisplayList 140000 .forcedef /MaxFormCache 100000 .forcedef /MaxImageBuffer 524288 .forcedef /MaxOutlineCache 65000 .forcedef /MaxPatternCache 100000 .forcedef /MaxUPathCache 300000 .forcedef /MaxScreenStorage 84000 .forcedef /MaxSourceList 25000 .forcedef /PrinterName product .forcedef /RamSize 4194304 .forcedef /WaitTimeout 40 .forcedef end % Define the procedures for handling comment scanning. The names % %ProcessComment and %ProcessDSCComment are known to the interpreter. % These procedures take the file and comment string and file as operands. /.checkprocesscomment { dup //null eq { pop //true } { dup xcheck { type dup /arraytype eq exch /packedarraytype eq or } { pop //false } ifelse } ifelse } .bind def /ProcessComment //null .definepsuserparam psuserparams /ProcessComment {//.checkprocesscomment exec} put (%ProcessComment) cvn { /ProcessComment getuserparam dup //null eq { pop pop pop } { exec } ifelse } bind def /ProcessDSCComment //null .definepsuserparam psuserparams /ProcessDSCComment {//.checkprocesscomment exec} put /.loadingfont //false def (%ProcessDSCComment) cvn { /ProcessDSCComment getuserparam dup //null eq .loadingfont or { pop pop pop } { exec } ifelse } bind def % ------ Miscellaneous ------ % (<<) cvn % - << -mark- /mark load def % (>> is defined primitively.) /languagelevel 2 def % When running in Level 2 mode, this interpreter is supposed to be % compatible with Adobe version 2017. /version (2017) readonly def % If binary tokens are supported by this interpreter, % set an appropriate default binary object format. /setobjectformat where { pop /RealFormat getsystemparam (IEEE) eq { 1 } { 3 } ifelse /ByteOrder getsystemparam { 1 add } if setobjectformat } if % Aldus Freehand versions 2.x check for the presence of the % setcolor operator, and if it is missing, substitute a procedure. % Unfortunately, the procedure takes different parameters from % the operator. As a result, files produced by this application % cause an error if the setcolor operator is actually defined % and 'bind' is ever used. Aldus fixed this bug in Freehand 3.0, % but there are a lot of files created by the older versions % still floating around. Therefore, at Adobe's suggestion, % we implement the following dreadful hack in the 'where' operator: % If the key is /setcolor, and % there is a dictionary named FreeHandDict, and % currentdict is that dictionary, % then "where" consults only that dictionary and not any other % dictionaries on the dictionary stack. .wheredict /setcolor { /FreeHandDict .where { /FreeHandDict get currentdict eq { pop currentdict /setcolor known { currentdict //true } { //false } ifelse } { .where } ifelse } { .where } ifelse } bind put % ------ Virtual memory ------ % /currentglobal % - currentglobal <bool> /currentshared load def /gcheck % <obj> gcheck <bool> /scheck load def /setglobal % <bool> setglobal - /setshared load def % We can make the global dictionaries very small, because they auto-expand. /globaldict currentdict /shareddict .knownget not { 4 dict } if def /GlobalFontDirectory SharedFontDirectory def % VMReclaim and VMThreshold are user parameters. /setvmthreshold { % <int> setvmthreshold - mark /VMThreshold 2 .argindex .dicttomark {.setuserparams2} stopped {pop /setvmthreshold load $error /errorname get signalerror} {pop} ifelse } odef /vmreclaim { % <int> vmreclaim - dup 0 gt { dup 2 le 1 index type /integertype eq and { pop % ignore user requests for vmreclaim % (reclaim will still happen controlled by vmthreshold) } { .vmreclaim } % let internal operator handle error conditions ifelse } { % VMReclaim userparam controls enable/disable GC mark /VMReclaim 2 index .dicttomark {.setuserparams2} stopped {pop /vmreclaim load $error /errorname get signalerror} {pop} ifelse } ifelse } odef -1 setvmthreshold % ------ IODevices ------ % /.getdevparams where { pop /currentdevparams { % <iodevice> currentdevparams <dict> .getdevparams .dicttomark } odef } if /.putdevparams where { pop /setdevparams { % <iodevice> <dict> setdevparams - dup type /dicttype ne { /setdevparams .systemvar /typecheck signalerror } if mark 1 index { } forall counttomark 2 add index .putdevparams pop pop } odef } if % ------ Job control ------ % serverdict begin % We could protect the job information better, but we aren't attempting % (currently) to protect ourselves against maliciousness. /.jobsave //null def % top-level save object /.jobsavelevel 0 def % save depth of job (0 if .jobsave is null, % 1 otherwise) /.adminjob //true def % status of current unencapsulated job end % serverdict % Because there may be objects on the e-stack created since the job save, % we have to clear the e-stack before doing the end-of-job restore. % We do this by executing a 2 .stop, which is caught by the 2 .stopped % in .runexec; we leave on the o-stack a procedure to execute aftewards. % %**************** The definition of startjob is not complete yet, since % it doesn't reset stdin/stdout. /.startnewjob { % <exit_bool> <password_level> % .startnewjob - serverdict /.jobsave get dup //null eq { pop } { restore } ifelse exch { % Unencapsulated job serverdict /.jobsave //null put serverdict /.jobsavelevel 0 put serverdict /.adminjob 3 -1 roll 1 gt put } { % Encapsulated job pop serverdict /.jobsave save put serverdict /.jobsavelevel 1 put .userdict /quit { stop } .bind put % CET 28-10 requires a procedure } ifelse % Reset the interpreter state. clear cleardictstack initgraphics //false setglobal } bind def /.startjob { % <exit_bool> <password> <finish_proc> % .startjob <ok_bool> vmstatus pop pop serverdict /.jobsavelevel get eq 2 .argindex .checkpassword 0 gt and { exch .checkpassword exch count 3 roll count 3 sub { pop } repeat cleardictstack % Reset the e-stack back to the 2 .stopped in .runexec, % passing the finish_proc to be executed afterwards. 2 .stop } { % Password check failed pop pop pop //false } ifelse } odef /startjob { % <exit_bool> <password> startjob <ok_bool> % This is a hack. We really need some way to indicate explicitly % to the interpreter that we are under control of a job server. 1 .argindex type /booleantype ne { /startjob .systemvar /typecheck signalerror } if { .startnewjob //true } .startjob } odef % The procedure to undo the job encapsulation /.endjob { clear cleardictstack serverdict /.jobsave get dup //null eq { pop } { restore } ifelse serverdict /.jobsave //null put 2 .vmreclaim % recover local and global VM } odef systemdict begin /quit { % - quit - //systemdict begin serverdict /.jobsave get //null eq { end //quit } { /quit .systemvar /invalidaccess /signalerror load end exec } ifelse } bind odef end % We would like to define exitserver as a procedure, using the code % that the Red Book says is equivalent to it. However, since startjob % resets the exec stack, we can't do this, because control would never % proceed past the call on startjob if the exitserver is successful. % Instead, we need to construct exitserver out of pieces of startjob. serverdict begin /exitserver { % <password> exitserver - //true exch { .startnewjob } .startjob not { /exitserver /invalidaccess signalerror } if } bind def end % serverdict % ------ Compatibility ------ % % In Level 2 mode, the following replace the definitions that gs_statd.ps % installs in statusdict and serverdict. % Note that statusdict must be allocated in local VM. % We don't bother with many of these yet. % convenience function to make a dictionary from an object and a key /.pair2dict { exch mark 3 1 roll .dicttomark } bind def currentglobal //false setglobal 25 dict exch setglobal begin currentsystemparams % The following do not depend on the presence of setpagedevice. /buildtime 1 index /BuildTime get def % Also define /buildtime in systemdict because Adobe does so and some fonts use it as ID systemdict /buildtime dup load put /byteorder 1 index /ByteOrder get def /checkpassword { .checkpassword 0 gt } bind def dup /DoStartPage known { /dostartpage { /DoStartPage getsystemparam } bind def /setdostartpage { /DoStartPage //.pair2dict exec setsystemparams } bind def } if dup /StartupMode known { /dosysstart { /StartupMode getsystemparam 0 ne } bind def /setdosysstart { { 1 } { 0 } ifelse /StartupMode //.pair2dict exec setsystemparams } bind def } if %****** Setting jobname is supposed to set userparams.JobName, too. /jobname { /JobName getuserparam } bind def /jobtimeout { /JobTimeout getuserparam } bind def /ramsize { /RamSize getsystemparam } bind def /realformat 1 index /RealFormat get def dup /PrinterName known { /setprintername { /PrinterName //.pair2dict exec setsystemparams } bind def } if /printername { currentsystemparams /PrinterName .knownget not { () } if exch copy } bind def currentuserparams /WaitTimeout known { /waittimeout { /WaitTimeout getuserparam } bind def } if % The following do require setpagedevice. /.setpagedevice where { pop } { (%END PAGEDEVICE) .skipeof } ifelse /defaulttimeouts { currentsystemparams dup /JobTimeout .knownget not { 0 } if exch /WaitTimeout .knownget not { 0 } if currentpagedevice /ManualFeedTimeout .knownget not { 0 } if } bind def /margins { currentpagedevice /Margins .knownget { exch } { [0 0] } ifelse } bind def /pagemargin { currentpagedevice /PageOffset .knownget { 0 get } { 0 } ifelse } bind def /pageparams { currentpagedevice dup /Orientation .knownget { 1 and ORIENT1 { 1 xor } if } { 0 } ifelse exch dup /PageSize get aload pop 3 index 0 ne { exch } if 3 2 roll /PageOffset .knownget { 0 get } { 0 } ifelse 4 -1 roll } bind def /setdefaulttimeouts { exch mark /ManualFeedTimeout 3 -1 roll /Policies mark /ManualFeedTimeout 1 .dicttomark .dicttomark setpagedevice /WaitTimeout exch mark /JobTimeout 5 2 roll .dicttomark setsystemparams } bind def /.setpagesize { 2 copy 2 array astore /PageSize //.pair2dict exec { setpagedevice } stopped { pop % the setpagedevice dict /setpagesize $error /errorname get signalerror } { pop pop % success -- pop the arguments } ifelse } bind def /setduplexmode { /Duplex //.pair2dict exec setpagedevice } bind def /setmargins { exch 2 array astore /Margins //.pair2dict exec setpagedevice } bind def /setpagemargin { 0 2 array astore /PageOffset //.pair2dict exec setpagedevice } bind def /setpageparams { mark /PageSize 6 -2 roll 4 index 1 and ORIENT1 { 1 } { 0 } ifelse ne { exch } if 2 array astore /Orientation 5 -1 roll ORIENT1 { 1 xor } if /PageOffset counttomark 2 add -1 roll 0 2 array astore .dicttomark setpagedevice } bind def /setresolution { count 1 lt { /setresolution /stackunderflow signalerror } if dup type dup /integertype eq exch /realtype eq or not { /setresolution /typecheck signalerror } if dup 2 array astore /HWResolution //.pair2dict exec { setpagedevice } stopped { pop /setresolution $error /errorname get signalerror } if } bind def %END PAGEDEVICE % The following are not implemented yet. %manualfeed %manualfeedtimeout %pagecount %pagestackorder %setpagestackorder % -------- ICC manager -------- % % All color management is going % through ICC flow. We need % to have the default device % spaces gray, RGB and CMYK % defined by ICC profiles //systemdict /ICCProfilesDir .knownget { % Set the directory sepcified by the command line option mark exch /ICCProfilesDir exch .dicttomark .setuserparams2 } { % First see if the current value is valid so we don't have to guess mark .currentuserparams .dicttomark /ICCProfilesDir get (default_gray.icc) concatstrings {status} .internalstopped {pop //false} if { pop pop pop pop % current value was OK. Just clean up stack } { % Search for valid (iccprofiles) directory as a sibling to (Resource) % and set it as a default if found. LIBPATH { (Resource) search { exch pop exch pop (iccprofiles) concatstrings .file_name_separator concatstrings dup (default_gray.icc) concatstrings status { pop pop pop pop mark exch /ICCProfilesDir exch .dicttomark .setuserparams2 exit } { pop } ifelse } { pop } ifelse } forall } ifelse % if currentuserparams ICCProfilesDir } ifelse % ICCProfilesDir set in systemdict (command line option) mark % collect dict key value pairs for anything set in systemdict (command line options) [ /DefaultRGBProfile /DefaultGrayProfile /DefaultCMYKProfile /DeviceNProfile /NamedProfile /SourceObjectICC /OverrideICC ] { dup //systemdict exch .knownget not { pop % discard keys not in systemdict } if } forall .dicttomark .setuserparams2 pop % currentsystemparams % Flag the current dictionary so it will be swapped when we % change language levels. (See zmisc2.c for more information.) /statusdict currentdict def currentdict end /statusdict exch .forcedef % statusdict is local, systemdict is global % The following compatibility operators are in systemdict. They are % defined here, rather than in gs_init.ps, because they require the % resource machinery. /devforall { % <proc> <scratch> devforall - exch { 1 index currentdevparams /Type .knownget { /FileSystem eq } { //false } ifelse { exec } { pop pop } ifelse } /exec load 3 packedarray cvx exch (*) 3 1 roll /IODevice resourceforall } odef /devstatus { % <(%disk*%)> devstatus <searchable> <writable> % <hasNames> <mounted> <removable> <searchOrder> % <freePages> <size> true % <string> devstatus false dup length 5 ge { dup 0 5 getinterval (%disk) eq { dup /IODevice resourcestatus { pop pop dup currentdevparams dup /Searchable get exch dup /Writeable get exch dup /HasNames get exch dup /Mounted get exch dup /Removable get exch dup /SearchOrder get exch dup /Free get exch /LogicalSize get 9 -1 roll pop //true } { pop //false } ifelse } { pop //false } ifelse } { pop //false } ifelse } odef % ------ Color spaces ------ % % gs_res.ps uses these entries in colorspacedict % to populate the ColorSpaceFamily resource, so we need % to add the supported spaces. % systemdict /colorspacedict get begin /CIEBasedA [] def /CIEBasedABC [] def /DevicePixel [] def /Indexed [] def /Pattern [] def /Separation [] def end % ------ CIE color rendering ------ % % Define findcolorrendering and a default ColorRendering ProcSet. /findcolorrendering { % <intentname> findcolorrendering % <crdname> <found> % Adobe interpreters report /findcolorrendering (literal name), not the % operator itself, if an error occurs in findcolorrendering. /findcolorrendering { /ColorRendering /ProcSet findresource 1 .argindex dup type /nametype eq { .namestring } if (.) concatstrings 1 index /GetPageDeviceName get exec dup type /nametype eq { .namestring } if (.) concatstrings 2 index /GetHalftoneName get exec dup type /nametype eq { .namestring } if concatstrings concatstrings cvn % stack: intentname procset crdname dup /ColorRendering resourcestatus { pop pop exch pop exch pop //true } { pop /GetSubstituteCRD get exec //false } ifelse } .errorexec } odef 5 dict dup begin /GetPageDeviceName { % - GetPageDeviceName <name> currentpagedevice dup /PageDeviceName .knownget { exch pop dup //null eq { pop /none } if } { pop /none } ifelse } bind def /GetHalftoneName { % - GetHalftoneName <name> currenthalftone /HalftoneName .knownget not { /none } if } bind def /GetSubstituteCRD { % <intentname> GetSubstituteCRD <crdname> pop /DefaultColorRendering } bind def end % The resource machinery hasn't been activated, so just save the ProcSet % and let .fixresources finish the installation process. /ColorRendering exch def % Define setcolorrendering. /.colorrenderingtypes 5 dict def /setcolorrendering { % <crd> setcolorrendering - dup /ColorRenderingType get dup type /integertype ne { /setcolorrendering .systemvar /typecheck signalerror } if //.colorrenderingtypes exch .knownget { exec } { /setcolorrendering .systemvar /rangecheck signalerror } ifelse } odef /.setcolorrendering1 where { pop } { (%END CRD) .skipeof } ifelse .colorrenderingtypes 1 { % Adobe ProcSet "Adobe_AGM_Core 2.0 0" places an /Intent key into CRD's dup /Intent .knownget { //.renderingintentdict exch .knownget { .setrenderingintent } if } if dup .buildcolorrendering1 .setcolorrendering1 } .bind put % Note: the value 101 in the next line must be the same as the value of % GX_DEVICE_CRD1_TYPE in gscrdp.h. .colorrenderingtypes 101 { dup .builddevicecolorrendering1 .setdevicecolorrendering1 } .bind put % sRGB output CRD, D65 white point mark /ColorRenderingType 1 /RangePQR [ -0.5 2 -0.5 2 -0.5 2 ] readonly % Bradford Cone Space /MatrixPQR [ 0.8951 -0.7502 0.0389 0.2664 1.7135 -0.0685 -0.1614 0.0367 1.0296] readonly /MatrixLMN [ 3.240449 -0.969265 0.055643 -1.537136 1.876011 -0.204026 -0.498531 0.041556 1.057229 ] readonly % Inverse sRGB gamma transform /EncodeABC [ { dup 0.00304 le { 12.92321 mul } { 1 2.4 div exp 1.055 mul 0.055 sub } ifelse } bind dup dup ] readonly /WhitePoint [ 0.9505 1 1.0890 ] readonly % D65 /BlackPoint [ 0 0 0 ] readonly % VonKries-like transform in Bradford Cone Space /TransformPQR % The implementations have been moved to C for performance. [ { .TransformPQR_scale_WB0 } bind { .TransformPQR_scale_WB1 } bind { .TransformPQR_scale_WB2 } bind ] readonly .dicttomark setcolorrendering %END CRD % Initialize a CIEBased color space for sRGB. /CIEsRGB [ /CIEBasedABC mark /DecodeLMN [ { dup 0.03928 le { 12.92321 div } { 0.055 add 1.055 div 2.4 exp } ifelse } bind dup dup ] readonly /MatrixLMN [ 0.412457 0.212673 0.019334 0.357576 0.715152 0.119192 0.180437 0.072175 0.950301 ] readonly /WhitePoint [0.9505 1.0 1.0890] readonly .dicttomark readonly ] readonly def % Special type to install % sRGB ICC profile color space /CIEsRGBICC [ /ICCBased mark /N 3 /DataSource (srgb) /Alternate [/DeviceRGB] /Name (srgb) .dicttomark ] def % Special type to install % sGray ICC profile color space /CIEsGRAYICC [ /ICCBased mark /N 1 /DataSource (sgray) /Alternate [/DeviceGray] /Name (sgray) .dicttomark ] def % ------ Painting ------ % %% We don't want to do any high level forms stuff if the source %% is PDF because : %% 1) Transparent forms are handled separately and we don't want to ge confused %% 2) PDF forms are too llikely to trip over the limitations in our support %% 3) Its highly unusual to find a PDF file which uses forms sensibly. %% %% So we have a special PDF version of execform which doesn't do high level forms. /.PDFexecform { % This is a separate operator so that the stacks will be restored % properly if an error occurs. dup /Matrix get concat dup /BBox get aload pop exch 3 index sub exch 2 index sub rectclip dup /PaintProc get 1 index /Implementation known not { 1 index dup /Implementation //null .forceput readonly pop } executeonly if exec }.bind odef /PDFexecform { gsave { .PDFexecform } stopped grestore {stop} if } odef % A straightforward definition of execform that doesn't actually % do any caching. /.execform1 { % This is a separate operator so that the stacks will be restored % properly if an error occurs. %% High level forms need the CTM before the Form Matrix is applied /UNROLLFORMS where {/UNROLLFORMS get}{false}ifelse not {matrix currentmatrix exch} if dup /Matrix get concat dup /BBox get aload pop exch 3 index sub exch 2 index sub rectclip dup /PaintProc get 1 index /Implementation known not { 1 index dup /Implementation //null .forceput readonly pop } executeonly if /UNROLLFORMS where {/UNROLLFORMS get}{false}ifelse not %% [CTM] <<Form>> PaintProc .beginform - { %% First,, check to see if we have no /Implementation already defined (see above) 1 index /Implementation get //null eq { %% We don't, so copy the form dictionary 1 index 4 1 roll %% tell devices we're starting a form, run the PaintProc, and then tell the devices we've finished 3 -1 roll 2 index .beginform exec %% This is all horrible code to deal with illegal forms which leave junk on the operand stack %% Starting from 1 (not 0, we don't want to look at the loop count) and going up to the %% number of objects on the stack, check each object to see if its the Form dict (it is %% *supposed* to be the top object after executing the PaintProc). I don't currently check to see if %% the PaintProc ate the dict, but if there are extra objects, remove them and tell %% the user. %% count 1 1 3 -1 roll { dup index dup type /dicttype eq { /Implementation known { 2 sub 0 1 3 -1 roll { QUIET not { (\n WARNING - Form PaintProc left operands on the stack after execution.\n This is technically illegal and these have been removed, \n if output is incorrect run again with -dUNROLLFORMS.\n) = } if pop pop } for exit }if } { pop pop }ifelse } for .endform %% Ask devices if they have cached the form, and what ID to use if so %% returning -1 means 'no ID' .get_form_id dup -1 eq {pop pop} { %% The form is cached with a specific ID. Make a dictionary (which we'll store in the %% Form dictioanry using the /Implementation key). 1 dict dup /FormID 4 -1 roll put 1 index exch /Implementation exch .forceput readonly pop } executeonly ifelse } { %% We have a (non-null) Implementation, get the dictionary and pull the %% FormID key from it, then tell the device to use the stored form with the %% specified key. pop dup /Implementation get /FormID get .repeatform }ifelse } {exec} ifelse } .bind odef % must bind .forceput /.formtypes 5 dict dup 1 /.execform1 load put def /execform { % <form> execform - gsave { dup /FormType get //.formtypes exch get exec } stopped grestore { stop } if } odef /.patterntypes 5 dict dup 1 /.buildpattern1 load put def /makepattern { % <proto_dict> <matrix> makepattern <pattern> dup type /dicttype eq { % "<dict> makepattern" reports /typecheck on Adobe /makepattern .systemvar /typecheck signalerror } if //.patterntypes 2 .argindex /PatternType get .knownget not { /makepattern .systemvar /rangecheck signalerror } if .currentglobal //false .setglobal exch % Stack: proto matrix global buildproc 3 index dup length 1 add dict .copydict % Stack: proto matrix global buildproc newdict 3 index 3 -1 roll exec % Stack: proto matrix global newdict instance % Create an 'Implementation' entry for the pattern dict. The PRLM 3rd says % this about the contents of Implementation: "The type and value of this % entry are implementation-dependent." The CET (page 2 of 18-02f) expects % that this entry be an array and that the second element of the array be a % gstate. We put our pattern instance struct into the first element of the % array. 1 index /Implementation 3 -1 roll .getCPSImode { gstate } { //null } ifelse 2 array astore put % put Implementation into the pattern dict. % Stack: proto matrix global newdict readonly exch .setglobal exch pop exch pop } odef /setpattern { % [<comp1> ...] <pattern> setpattern - { currentcolorspace 0 get /Pattern ne { [ /Pattern currentcolorspace ] setcolorspace } if setcolor } stopped { /setpattern .systemvar $error /errorname get signalerror } if } odef % The following functions emulate the actions of findcmykcustomcolor and % setcustomcolor. These functions are described in Adobe's TN 5044. That % same document also says "The following "operators" are not defined in the % PostScript Language Reference Manual, but should be used as pseudo-operators % in your PostScript language output. Separation applications from Adobe % Systems and other vendors will redefine these convention operators to % separate your documents. Your application should conditionally define % procedures with these special names, as shown later in this document." % % We are providing these functions because we have found files created by % "QuarkXPress: pictwpstops filter 1.0" which produce bad shading dictionaries % if these operators are not defined. % Also we add a findrgbcustomcolor that was discovered in Adobe Illustrator % AI5 (Adobe Illustrator (R) Version 7.0 Full Prolog) ProcSet that allows % us to create Separation colorspace with a /DeviceRGB tint transform. % Conditionally disable the TN 5044 psuedo-ops if NO_TN5044 specified /NO_TN5044 where { pop (%END TN 5044 psuedo-ops) .skipeof } if % TN 5044 does not define the contents of the array. We are simply putting % the values given into an array. This is consistent with what we see when % testing with Adobe Distiller 6.0. % <cyan> <magenta> <yellow> <black> <key> findcmykcustomcolor <array> /findcmykcustomcolor { 5 array astore } bind executeonly def % The following isn't documented by Adobe, but was found in Adobe Illustrator (R) % Version 7.0 Full Prolog /findrgbcustomcolor { 4 array astore } bind executeonly def % Build a tint transform function for use by setcustomcolor. This function % is for a Separation color space which has either a DeviceCMYK base color space % (i.e. 1 input and 4 outputs) or a DeviceRGB colorspace (1 in, 3 out). % The input to buildcustomtinttransform is the array created by findcmykcustomcolor % and the length of the array is used to determine the alternate colorspace. % The resulting function for CMYK is: % { dup cyan mul exch dup magenta mul exch dup yellow mul exch black mul } % Where cyan, magenta, yellow, and black are values from the array. % For RGB, since the resulting function is: % { dup red mul exch dup green mul exch blue mul } /buildcustomtinttransform % <array> buildcustomtinttransform <function> { dup length 5 eq { % CMYK [ /dup load 2 index 0 get /mul load /exch load /dup load 6 index 1 get /mul load /exch load /dup load 10 index 2 get /mul load /exch load 13 index 3 get /mul load ] } { % RGB is assumed [ /dup load 2 index 0 get /mul load /exch load /dup load 6 index 1 get /mul load /exch load 9 index 2 get /mul load ] } ifelse cvx bind exch pop % Make executable and remove the input array } bind executeonly def % Construct the colorspace array to be used by setcolorspace from the array % result of either findcmykcustomcolor or findrgbcustomcolor. /buildcolorspacearray % <array> buildcustomtinttransform <colorspace_array> { % as with buildcustomtinttransform, the length of the array is used to % determine the alternate colorspace dup length 5 eq { % Start building Separation colorspace with CMYK alternate [ /Separation 2 index 4 get % Get separation name from array's key /DeviceCMYK 4 index //buildcustomtinttransform exec % build the tint transform function ] } { [ /Separation 2 index 3 get % Get separation name from array's key /DeviceRGB 4 index //buildcustomtinttransform exec % build the tint transform function ] } ifelse exch pop % remove the input array } bind executeonly def % Set a custom color based upon a tint and array which describes the custom % color. See findcmykcustomcolor. First we create and then set a Separation % colorspace. Then we set the specified color. % Note that older Adobe ProcSets apparently allow for 'null' as the tint % for some reason, so an alternate operational mode is tolerated: % null setcustomcolor - /setcustomcolor % <array> <tint> setcustomcolor - { dup //null eq { pop pop }{ % Check that the tint is a number between 0 and 1 dup type dup /integertype eq exch /realtype eq or not { /setcustomcolor /typecheck cvx signalerror } if dup 1 le not { /setcustomcolor /rangecheck cvx signalerror } if dup 0 ge not { /setcustomcolor /rangecheck cvx signalerror } if % The array is supposed to be the result of fundcmykcustomcolor. Our % implementation just pushes all the arguments into the array and that's % what buildcolorspacearray expects. So check that now. % Starting with the first N-1 elemenst which must be numbers where 0 <= x <= 1 1 index 0 1 2 index length 2 sub { 1 index exch get dup type dup /integertype eq exch /realtype eq or not { /setcustomcolor /typecheck cvx signalerror } if dup 1 le not { /setcustomcolor /rangecheck cvx signalerror } if 0 ge not { /setcustomcolor /rangecheck cvx signalerror } if } for % Finally, check the last element of the array, which must be a string. dup length 1 sub get type /stringtype eq not { /setcustomcolor /typecheck cvx signalerror } if exch //buildcolorspacearray exec setcolorspace % Set the Separation color space as current setcolor % Set the tint as the current color } ifelse } bind executeonly def % This proc is supposed to implement a version of overprinting. TN 5044 says % that this proc is not used by any shipping host-based application. We have % only found it being used in a proc set in files by Canvas from Deneba Systems. % Even their proc set does not actually do any overprinting. However their % files crash if this is not defined. Thus we have a copy of this proc but % we are simply checking for inputs being -1 and if so then we set the value % to 0. /setcmykoverprint { 4 { dup -1 eq { pop 0 } if 4 1 roll } repeat setcmykcolor } bind def /separation_all [/Separation /All /DeviceCMYK { dup dup dup } bind ] readonly def % Collect the arguments into the image dictionary % <width> <height> <bits/sample> <matrix> <proc> args2dict <dict> /args2dict { 10 dict begin {1 0} 1 { /ImageType /Decode /DataSource /ImageMatrix /BitsPerComponent /Height /Width } { exch def } forall currentdict end } bind def % Prints (1-gray) on all separations. % <gray> setseparationgray - /setseparationgray { //separation_all setcolorspace 1 exch sub setcolor } bind def % Renders an image whose sample values specify the amount of the custom color. % <width> <height> <bits/sample> <matrix> <proc> <array> customcolorimage - /customcolorimage { gsave //buildcolorspacearray exec setcolorspace //args2dict exec image grestore } bind def % Renders an image on all process and custom color plates. % <width> <height> <bits/sample> <matrix> <proc> /separationimage { gsave //separation_all setcolorspace //args2dict exec image grestore } bind def { /buildcustomtinttransform /buildcolorspacearray /separation_all /args2dict } { currentdict exch undef } forall %END TN 5044 psuedo-ops end % level2dict % undefine things defined in this file and not referenced elsewhere [ /.checkprocesscomment /.pair2dict /.setcolorrendering1 /.checkparamtype /.checksetparams ] {level2dict exch .forceundef} forall