ref: 678be8399090b9eb90f983b1b4105495893f57f1
dir: /sys/src/cmd/gs/lib/gs_lev2.ps/
% Copyright (C) 1990, 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: gs_lev2.ps,v 1.38 2005/10/04 17:51:52 ray Exp $
% 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 index {
% 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 % not odef, shouldn't reset stacks
% 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 def
% 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 index 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 cvx 2 packedarray cvx put
userparams 3 1 roll put
} .bind def
end
/currentuserparams { % - currentuserparams <dict>
/userparams .systemvar dup length dict .copydict
} odef
/setuserparams { % <dict> setuserparams -
% Check that we will be able to set the PostScript-level
% user parameters.
/setuserparams /psuserparams .systemvar .checksetparams
% 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
} {
pop pop
} ifelse
} 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 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 index .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.
/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 cvx 2 packedarray cvx
} forall .dicttomark .checksetparams
% 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
}
{ pop pop
}
ifelse
}
forall pop
} .bind 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 index .dicttomark setuserparams pop
} .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
} .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 5000 .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
/CurOutlineCache 0 .forcedef
/CurPatternCache 0 .forcedef
/CurUPathCache 0 .forcedef
/CurScreenStorage 0 .forcedef
/CurSourceList 0 .forcedef
/DoPrintErrors false .forcedef
/MaxDisplayList 140000 .forcedef
/MaxFormCache 100000 .forcedef
/MaxOutlineCache 65000 .forcedef
/MaxPatternCache 100000 .forcedef
/MaxUPathCache 300000 .forcedef
/MaxScreenStorage 84000 .forcedef
/MaxSourceList 25000 .forcedef
/RamSize 4194304 .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} put
(%ProcessComment) cvn {
/ProcessComment getuserparam
dup null eq { pop pop pop } { exec } ifelse
} bind def
/ProcessDSCComment null .definepsuserparam
psuserparams /ProcessDSCComment {.checkprocesscomment} 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
(>>) cvn % -mark- <key1> <value1> ... >> <dict>
/.dicttomark load def
/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 index .dicttomark setuserparams pop
} odef
/vmreclaim { % <int> vmreclaim -
dup 0 gt {
.vmreclaim
} {
mark /VMReclaim 2 index .dicttomark setuserparams pop
} ifelse
} odef
-1 setvmthreshold
% ------ IODevices ------ %
/.getdevparams where {
pop /currentdevparams { % <iodevice> currentdevparams <dict>
.getdevparams .dicttomark
} odef
} if
/.putdevparams where {
pop /setdevparams { % <iodevice> <dict> setdevparams -
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
% The Adobe documentation doesn't say what happens to the
% graphics state stack in this case, but an experiment
% produced results suggesting that a grestoreall occurs.
grestoreall
} {
% Encapsulated job
pop
serverdict /.jobsave save put
serverdict /.jobsavelevel 1 put
.userdict /quit /stop load put
} ifelse
% Reset the interpreter state.
clear cleardictstack
initgraphics
false setglobal
2 vmreclaim % Make sure GC'ed memory is reclaimed and freed.
} bind def
/.startjob { % <exit_bool> <password> <finish_proc>
% .startjob <ok_bool>
vmstatus pop pop serverdict /.jobsavelevel get eq
2 index .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.
{ .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 load /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.
/.dict1 { 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 .dict1 setsystemparams } bind def
} if
dup /StartupMode known
{ /dosysstart { /StartupMode getsystemparam 0 ne } bind def
/setdosysstart { { 1 } { 0 } ifelse /StartupMode .dict1 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 .dict1 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 array astore /PageSize .dict1 setpagedevice } bind def
/setduplexmode { /Duplex .dict1 setpagedevice } bind def
/setmargins
{ exch 2 array astore /Margins .dict1 setpagedevice
} bind def
/setpagemargin { 0 2 array astore /PageOffset .dict1 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
{ dup 2 array astore /HWResolution .dict1 setpagedevice
} bind def
%END PAGEDEVICE
% The following are not implemented yet.
%manualfeed
%manualfeedtimeout
%pagecount
%pagestackorder
%setpagestackorder
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 ------ %
% Move setcolorsapce, setcolor, and colorspacedict to level2dict
level2dict /setcolorspace .cspace_util 1 index get put
level2dict /setcolor .cspace_util 1 index get put
level2dict /colorspacedict .cspace_util 1 index get put
% Add the level 2 color spaces
% DevicePixel is actually a LanguageLevel 3 feature; it is here for
% historical reasons.
%% Replace 1 (gs_devpxl.ps)
(gs_devpxl.ps) runlibfile
%% Replace 1 (gs_ciecs2.ps)
(gs_ciecs2.ps) runlibfile
%% Replace 1 (gs_indxd.ps)
(gs_indxd.ps) runlibfile
%% Replace 1 (gs_sepr.ps)
(gs_sepr.ps) runlibfile
%% Replace 1 (gs_patrn.ps)
(gs_patrn.ps) runlibfile
% ------ CIE color rendering ------ %
% Define findcolorrendering and a default ColorRendering ProcSet.
/findcolorrendering { % <intentname> findcolorrendering
% <crdname> <found>
/ColorRendering /ProcSet findresource
1 index .namestring (.) concatstrings
1 index /GetPageDeviceName get exec .namestring (.) concatstrings
2 index /GetHalftoneName get exec .namestring
concatstrings concatstrings
dup /ColorRendering resourcestatus {
pop pop exch pop exch pop true
} {
pop /GetSubstituteCRD get exec false
} ifelse
} 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 //.colorrenderingtypes exch get exec
} odef
/.setcolorrendering1 where { pop } { (%END CRD) .skipeof } ifelse
.colorrenderingtypes 1 {
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
% ------ Painting ------ %
% 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.
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
} if
exec
} .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>
//.patterntypes 2 index /PatternType get get
.currentglobal false .setglobal exch
% Stack: proto matrix global buildproc
3 index dup length 1 add dict .copydict
3 index 3 -1 roll exec 3 -1 roll .setglobal
1 index /Implementation 3 -1 roll put
readonly exch pop exch pop
} odef
/setpattern { % [<comp1> ...] <pattern> setpattern -
currentcolorspace 0 get /Pattern ne {
[ /Pattern currentcolorspace ] setcolorspace
} if setcolor
} 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.
% 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 def
% Build a tint transform function for use by setcustomcolor. This function
% is for a Separation color space which has a DeviceCMYK base color space
% (i.e. 1 input and 4 outputs). The input to buildcustomtinttransform is the
% array created by findcmykcustomcolor. The resulting function 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.
/buildcustomtinttransform % <array> buildcustomtinttransform <function>
{ [ /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
] cvx bind
exch pop % Remove the input array
} bind 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 ne {
% Start building Separation colorspace
[ /Separation 3 index 4 get % Get separation name from array's key
/DeviceCMYK
5 index buildcustomtinttransform ] % build the tint transform function
setcolorspace % Set the Separation color space as current
setcolor % Set the tint as the current color
pop % Remove the input array
}
{ pop } % 'null' as the tint is ignored
ifelse
} bind 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
%END TN 5044 psuedo-ops
end % level2dict