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% 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 PostScript LanguageLevel 3 functions.
% This file must be loaded after gs_lev2.ps and gs_res.ps.
% These definitions go into ll3dict or various ProcSets.
% NOTE: the interpreter creates ll3dict.
ll3dict begin
% We need LanguageLevel 2 or higher in order to have setuserparams and
% defineresource.
languagelevel dup 2 .max .setlanguagelevel
% ------ Idiom recognition ------ %
/IdiomRecognition //false .definepsuserparam
% Modify `bind' to apply idiom recognition afterwards.
/.bindscratch 128 string def
% Note that since this definition of `bind' may get bound in,
% it has to function properly even at lower language levels,
% where IdiomRecognition may not be defined.
/.bind_ { % <proc> .bind <proc'>
//.bind currentuserparams /IdiomRecognition
.knownget not { //false } if
{
//false
/IdiomSet .findcategory .Instances
{
exch pop % pop the IdiomSet identifying key. Stack /proc /false [-dict- status size]
0 get % get resource instance, a dictionary. Stack : /proc false -dict-
{
exch pop % pop the instance identifying key
% Stack: proc //false [template substitute]
dup 1 get exch 0 get % Stack: proc //false substitute template
3 index .eqproc {
% Stack: proc //false substitute
3 -1 roll pop exch not % Stack: substitute true
} {
pop % Stack: proc //false
} ifelse
} forall
dup {exit} if % Stack proc <bool>
} forall
not % Not matched in global resources
currentglobal not and % must not match local resources if currentglobal is true
{
//false
.LocalInstances
{
exch pop % pop IdiomSet identifying key. Stack /proc /false [-dict- status size]
0 get % get resource instance, a dictionary Stack : /proc false -dict-
{
exch pop % pop instance identifier key
% Stack: proc //false [template substitute]
dup 1 get exch 0 get % Stack: proc //false substitute template
3 index .eqproc {
% Stack: proc //false substitute
2 index gcheck % Stack: proc //false substitute _global?_
1 index gcheck not and % Stack: proc //false substitute _global?_ _global?_
{ % must not match if candidate in global VM and substitute in local
pop % Stack: proc //false
} {
% Stack: proc //false substitute
3 -1 roll pop exch not % Stack: substitute true
}ifelse
} {
pop % Stack: proc //false
} ifelse
} forall
dup {exit} if
} forall
pop % Stack: proc/substitute
} if
end % .findcategory makes the category dictionary the current dict, so we must pop it from dict stack
} if
} def
/.bind /.bind_ load odef % note that .bind_ will get bound
currentdict /.bindscratch .undef
DELAYBIND not {
% We can't just do
% /bind /.bind load def
% because then /bind load == prints --.bind-- .
/bind {//.bind_ exec} odef
} if
currentdict /.bind_ undef
% ------ HalftoneTypes 6, 10, 16 and HalftoneMode ------ %
% This code depends on an internal HalftoneType 7 with the following keys:
% Width, Height, Width2, Height2, TransferFunction:
% as for HalftoneType 16.
% Thresholds: a string or bytestring holding the thresholds,
% (Width x Height + Width2 x Height2) x BitsPerSample / 8 bytes,
% as for HalftoneType 16 except that the samples may be either
% 8 or 16 bits wide.
% BitsPerSample: 8 or 16.
% Note that this HalftoneType never appears in halftone dictionaries given
% to sethalftone, only as a component in those given to .sethalftone5,
% so its numeric value can be chosen ad lib as long as it differs from the
% other values that are legal in component dictionaries for .sethalftone5
% (currently only 1 and 3).
/.makehalftone7 { % <dict> <dict> <source> <Width> <Height>
% (<Width2> <Height2> | null) <BPS> .makehalftone7
% <setdict> <dict5> { .sethalftone5 }
8 dict begin
/HalftoneType 7 def
/BitsPerSample exch def
dup //null eq {
pop 0
} {
/Height2 1 index def /Width2 2 index def mul
} ifelse 3 1 roll
/Height 1 index def
/Width 2 index def
mul add BitsPerSample 8 idiv mul .bigstring
% Stack: dict dict source str
dup type /stringtype eq { readstring } { .readbytestring } ifelse
not { /sethalftone .systemvar /rangecheck signalerror exit } if
readonly /Thresholds exch def
/TransferFunction .knownget { /TransferFunction exch def } if
% If the original Thresholds was a file, replace it with
% a new one.
dup /Thresholds get type /filetype eq {
dup /Thresholds [ Thresholds ] cvx 0 () .subfiledecode put
} if
mark /HalftoneType 5 /Default currentdict end .dicttomark
{ .sethalftone5 }
} bind def
/.bigstring { % <size> .bigstring <string|bytestring>
dup 65400 gt { .bytestring } { string } ifelse
} bind def
/.readbytestring { % <source> <bytestring> .readbytestring
% <bytestring> <filled>
% Note that since bytestrings don't implement getinterval,
% if filled is false, there is no way to tell how much
% was read.
//true exch 0 1 2 index length 1 sub {
% Stack: source true str index
3 index read not { pop exch not exch exit } if
3 copy put pop pop
} for 3 -1 roll pop exch
} bind def
/.sethalftone6 { % <dict> <dict> .sethalftone6 <setdict> <dict5>
% { .sethalftone5 }
% Keys: Width, Height, Thresholds, T'Function
dup /Thresholds get
1 index /Width get 2 index /Height get
//null 8 .makehalftone7
} bind def
/.sethalftone10 { % <dict> <dict> .sethalftone10 <setdict> <dict5>
% { .sethalftone5 }
% Keys: Xsquare, Ysquare, Thresholds, T'Function
% Note that this is the only one of these three HalftoneTypes
% that allows either a file or a string for Thresholds.
dup /Thresholds get dup type /stringtype eq { 0 () .subfiledecode } if
1 index /Xsquare get dup 3 index /Ysquare get dup
8 .makehalftone7
} bind def
/.sethalftone16 { % <dict> <dict> .sethalftone16 <setdict> <dict5>
% { .sethalftone5 }
% Keys: Width, Height, Width2, Height2,
% Thresholds, T'Function
dup /Thresholds get
1 index /Width get 2 index /Height get
3 index /Width2 .knownget { % 2-rectangle case
4 index /Height2 get
} { % 1-rectangle case
//null
} ifelse 16 .makehalftone7
} bind def
.halftonetypes begin
6 /.sethalftone6 load def
10 /.sethalftone10 load def
16 /.sethalftone16 load def
end
% Redefine the halftone-setting operators to honor HalftoneMode.
/setcolorscreen {
/HalftoneMode getuserparam 0 eq {
//setcolorscreen
} {
12 { pop } repeat .getdefaulthalftone
{ //sethalftone }
{ .setdefaulthalftone }
ifelse
} ifelse
} odef
/setscreen {
/HalftoneMode getuserparam 0 eq {
//setscreen
} {
pop pop pop .getdefaulthalftone
{ //sethalftone }
{ .setdefaulthalftone }
ifelse
} ifelse
} odef
/sethalftone {
/HalftoneMode getuserparam 0 eq {
//sethalftone
} {
gsave //sethalftone grestore
.getdefaulthalftone
{ //sethalftone }
{ .setdefaulthalftone }
ifelse
} ifelse
} odef
% ------ ImageTypes 3 and 4 (masked images) ------ %
% Put the new data source in the requested dictionary.
% Copy the updated dictionary because it nay be used elsewhere.
% <dict> <data> <name> update_image3 <dict'>
/update_image3 {
3 -1 roll dup length dict copy dup % [data] /name <<image>> <<image>>
2 index get % [data] /name <<image>> <<sub-image>>
dup length dict copy dup % [data] /name <<image>> <<sub-image>> <<sub-image>>
/DataSource 6 -1 roll put % /name <<image>> <<sub-image>>
exch dup % /name <<sub-image>> <<image>> <<image>>
4 2 roll % <<image>> <<image>> /name <<sub-image>>
put % <<image>>
} bind def
% Copy mask data source to a reusable stream
% <dict> <source> buffer_mask <dict> <file>
/buffer_mask {
1 index /MaskDict get
dup /Width get
1 index /BitsPerComponent get mul 7 add 8 idiv
exch /Height get mul () /SubFileDecode filter
/ReusableStreamDecode filter
} bind def
% Data type vs. mask type decission table.
% All procedures have the signature:
% <image dict> <data DataSource> <mask DataSource> proc <image dict'>
/data_mask_dict mark
/stringtype mark % data is a string
/stringtype { pop pop } bind
/arraytype { % convert data to proc, don't buffer mask
pop
dup type dup /arraytype eq exch /packedarraytype eq or {
[ exch { 1 array astore cvx } forall ]
} {
1 array astore cvx
} ifelse
/DataDict //update_image3 exec
} bind
/packedarraytype 1 index
/filetype { % convert data to file, don't buffer mask
pop
dup type dup /arraytype eq exch /packedarraytype eq or {
[ exch { 1 array astore cvx 0 () /SubFileDecode filter } forall ]
} {
1 array astore cvx 0 () /SubFileDecode filter
} ifelse
/DataDict //update_image3 exec
} bind
.dicttomark readonly
/arraytype mark % data is a proc
/stringtype { % convert mask to proc
exch pop
1 array astore cvx
/MaskDict //update_image3 exec
} bind
/arraytype { % buffer mask in reusable stream and convert back to proc
exch pop
//buffer_mask exec
500 string
{ readstring pop } aload pop
4 packedarray cvx
/MaskDict //update_image3 exec
} bind
/packedarraytype 1 index
/filetype 1 index
.dicttomark readonly
/packedarraytype 1 index
/filetype mark % data is a file
/stringtype { % convert mask to file
exch pop
1 array astore cvx 0 () /SubFileDecode filter
/MaskDict //update_image3 exec
} bind
/arraytype { % buffer the mask and convert to file
exch pop
//buffer_mask exec
/MaskDict //update_image3 exec
} bind
/packedarraytype 1 index
/filetype {
//systemdict /userdict get /PDFTopSave known {
pop pop % mask is already buffered by PDF interpreter
} {
exch pop % buffer the mask
//buffer_mask exec
/MaskDict //update_image3 exec
} ifelse
} bind
.dicttomark readonly
.dicttomark readonly def
.imagetypes
dup 3 {
dup /InterleaveType get 3 eq {
% .image3 requires data sources of the image and mask to be of the
% same type. Work around this restriction here.
dup /DataDict get /DataSource get
1 index /MaskDict get /DataSource get % <<>> data mask
dup type % <<>> data mask mask_type
2 index
4 index /DataDict get /MultipleDataSources .knownget {
{ 0 get } if
} if
type % <<>> data mask mask_type data_type
//data_mask_dict exch .knownget {
exch .knownget {
exec
} {
pop pop % pass wrong type as is to .image3
} ifelse
} {
pop pop pop % pass wrong type as is to .image3
} ifelse
} if
.image3
} bind put
dup 4 /.image4 load put
% We also detect ImageType 103 here: it isn't worth making a separate file
% just for this.
/.image3x where { pop dup 103 /.image3x load put } if
pop
currentdict /data_mask_dict undef
currentdict /update_image3 undef
currentdict /buffer_mask undef
% ------ Functions ------ %
% Define the FunctionType resource category.
/Generic /Category findresource dup maxlength 3 add dict .copydict begin
/InstanceType /integertype def
/FunctionType currentdict end /Category defineresource pop
{0 2 3} { dup /FunctionType defineresource pop } forall
% ------ Smooth shading ------ %
% Define the ShadingType resource category.
/Generic /Category findresource dup maxlength 3 add dict .copydict begin
/InstanceType /integertype def
/ShadingType currentdict end /Category defineresource pop
systemdict /.shadingtypes mark % not ll3dict
1 /.buildshading1 load
2 /.buildshading2 load
3 /.buildshading3 load
4 /.buildshading4 load
5 /.buildshading5 load
6 /.buildshading6 load
7 /.buildshading7 load
.dicttomark put
systemdict /.reuseparamdict mark
/Intent 2
/AsyncRead //false
/CloseSource //true
.dicttomark readonly put
/.buildshading { % <shadingdict> .buildshading <shading>
dup rcheck not {
% Adobe seems to access ColorSpace first and CET 12-14c checks this.
/$error .systemvar /errorinfo [ /ColorSpace //null ] put
/shfill .systemvar /invalidaccess signalerror
} if
% Unfortunately, we always need to make the DataSource reusable,
% because if clipping is involved, even shfill may need to read
% the source data multiple times. If it weren't for this,
% we would only need to create a reusable stream if the ultimate
% source of the data is a procedure (since the library can't
% suspend shading to do a procedure callout).
dup /DataSource .knownget {
dup type /filetype eq {
//.reuseparamdict /ReusableStreamDecode filter
% Copy the dictionary to replace the DataSource, but make sure the
% copy is in the same VM as the original.
.currentglobal 2 index gcheck .setglobal
% Stack: shdict rsdfile saveglobal
2 index dup length dict copy exch .setglobal
dup /DataSource 4 -1 roll put exch pop
} {
pop
} ifelse
} if
% The .buildshading operators use the current color space
% for ColorSpace.
dup /ShadingType .knownget not { % error handling for CET 12-14b conformance
/$error .systemvar /errorinfo [ /ShadingType //null ] put
/shfill .systemvar /undefined signalerror
} if
dup type /integertype ne {
/$error .systemvar /errorinfo [ /ShadingType 4 index ] put
/shfill .systemvar /typecheck signalerror
} if
//.shadingtypes 1 index .knownget not {
/$error .systemvar /errorinfo [ /ShadingType 4 index ] put
/shfill .systemvar /rangecheck signalerror
} if
exch pop 1 index /ColorSpace .knownget {
{ setcolorspace } stopped {
/$error .systemvar /errorinfo [ /ColorSpace 4 index ] put
/shfill .systemvar /$error .systemvar /errorname get signalerror
} if
exec
} {
/$error .systemvar /errorinfo [ /ColorSpace //null ] put
/shfill .systemvar /undefined signalerror
} ifelse
} bind def
/.buildshading_and_shfill {
.buildshading .shfill
} bind def
systemdict /.reuseparamdict undef
/.buildpattern2 { % <template> <matrix> .buildpattern2
% <template> <pattern>
% We want to build the pattern without doing gsave/grestore,
% since we want it to load the CIE caches.
1 index /Shading get
mark currentcolor currentcolorspace
counttomark 4 add -3 roll mark 4 1 roll
% Stack: -mark- ..color.. cspace -mark- template matrix shadingdict
{ .buildshading } stopped {
cleartomark setcolorspace setcolor pop stop
} if
.buildshadingpattern
3 -1 roll pop counttomark 1 add 2 roll setcolorspace setcolor pop
} bind def
.patterntypes
2 /.buildpattern2 load put
/shfill { % <shadingdict> shfill -
% Currently, .shfill requires that the color space
% in the pattern be the current color space.
% Disable overprintmode for shfill
{ dup gsave 0 .setoverprintmode .buildshading_and_shfill } stopped
grestore {
/$error .systemvar /errorinfo 2 copy known {
pop pop
} {
//null put % CET 12-14c
} ifelse
stop
} if
pop
} odef
% Establish an initial smoothness value that matches Adobe RIPs.
0.02 setsmoothness
% ------ DeviceN color space ------ %
% 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
/CIEBasedDEF [] def
/CIEBasedDEFG [] def
/DeviceN [] def
end
% ------ Miscellaneous ------ %
% Make the setoverprintmode and currentoverprintmode operators visible (3015)
% Because of the requirements of PDF, the .currentoverprintmode and
% .setoverprintmode operators have integer parameters. Thus we need to
% convert the Postscript bool parameters to integers.
%
/setoverprintmode % bool setoverprint -
{
{ 1 } { 0 } ifelse % convert bool to integer
//.setoverprintmode
} odef
/currentoverprintmode % - currentoverprintmode bool
{
//.currentoverprintmode
0 ne % convert integers to bool
} odef
% Define additional user and system parameters.
/HalftoneMode 0 .definepsuserparam
/MaxSuperScreen 1016 .definepsuserparam
pssystemparams begin % read-only, so use .forcedef
/MaxDisplayAndSourceList 160000 .forcedef
end
% Define the IdiomSet resource category.
{ /IdiomSet } {
/Generic /Category findresource dup maxlength 3 add dict .copydict begin
/InstanceType /dicttype def
currentdict end /Category defineresource pop
} forall
(*) {
dup type /nametype eq not {
cvn
} if
/IdiomSet findresource pop
} 256 string /IdiomSet resourceforall
/languagelevel 3 def
% When running in LanguageLevel 3 mode, this interpreter is supposed to be
% compatible with Adobe version 3010.
/version (3010) readonly def
.setlanguagelevel
end % ll3dict
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