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569 lines
19 KiB
569 lines
19 KiB
% Copyright (C) 2001-2024 Artifex Software, Inc.
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% All Rights Reserved.
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%
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% This software is provided AS-IS with no warranty, either express or
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% implied.
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%
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% This software is distributed under license and may not be copied,
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% modified or distributed except as expressly authorized under the terms
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% of the license contained in the file LICENSE in this distribution.
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%
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% Refer to licensing information at http://www.artifex.com or contact
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% Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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% CA 94129, USA, for further information.
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%
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% Initialization file for PostScript LanguageLevel 3 functions.
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% This file must be loaded after gs_lev2.ps and gs_res.ps.
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% These definitions go into ll3dict or various ProcSets.
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% NOTE: the interpreter creates ll3dict.
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ll3dict begin
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% We need LanguageLevel 2 or higher in order to have setuserparams and
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% defineresource.
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languagelevel dup 2 .max .setlanguagelevel
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% ------ Idiom recognition ------ %
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/IdiomRecognition //false .definepsuserparam
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% Modify `bind' to apply idiom recognition afterwards.
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/.bindscratch 128 string def
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% Note that since this definition of `bind' may get bound in,
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% it has to function properly even at lower language levels,
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% where IdiomRecognition may not be defined.
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/.bind_ { % <proc> .bind <proc'>
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//.bind currentuserparams /IdiomRecognition
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.knownget not { //false } if
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{
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//false
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/IdiomSet //.findcategory exec .Instances
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{
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exch pop % pop the IdiomSet identifying key. Stack /proc /false [-dict- status size]
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0 get % get resource instance, a dictionary. Stack : /proc false -dict-
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{
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exch pop % pop the instance identifying key
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% Stack: proc //false [template substitute]
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dup 1 get exch 0 get % Stack: proc //false substitute template
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3 index .eqproc {
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% Stack: proc //false substitute
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3 -1 roll pop exch not % Stack: substitute true
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} {
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pop % Stack: proc //false
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} ifelse
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} forall
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dup {exit} if % Stack proc <bool>
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} forall
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not % Not matched in global resources
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currentglobal not and % must not match local resources if currentglobal is true
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{
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//false
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.LocalInstances
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{
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exch pop % pop IdiomSet identifying key. Stack /proc /false [-dict- status size]
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0 get % get resource instance, a dictionary Stack : /proc false -dict-
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{
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exch pop % pop instance identifier key
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% Stack: proc //false [template substitute]
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dup 1 get exch 0 get % Stack: proc //false substitute template
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3 index .eqproc {
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% Stack: proc //false substitute
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2 index gcheck % Stack: proc //false substitute _global?_
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1 index gcheck not and % Stack: proc //false substitute _global?_ _global?_
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{ % must not match if candidate in global VM and substitute in local
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pop % Stack: proc //false
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} {
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% Stack: proc //false substitute
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3 -1 roll pop exch not % Stack: substitute true
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}ifelse
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} {
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pop % Stack: proc //false
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} ifelse
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} forall
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dup {exit} if
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} forall
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pop % Stack: proc/substitute
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} if
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end % .findcategory makes the category dictionary the current dict, so we must pop it from dict stack
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} if
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} def
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/.bind /.bind_ load odef % note that .bind_ will get bound
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currentdict /.bindscratch .undef
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DELAYBIND not {
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% We can't just do
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% /bind /.bind load def
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% because then /bind load == prints --.bind-- .
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/bind {//.bind_ exec} odef
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} if
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currentdict /.bind_ undef
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/.readbytestring { % <source> <bytestring> .readbytestring
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% <bytestring> <filled>
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% Note that since bytestrings don't implement getinterval,
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% if filled is false, there is no way to tell how much
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% was read.
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//true exch 0 1 2 index length 1 sub {
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% Stack: source true str index
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3 index read not { pop exch not exch exit } if
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3 copy put pop pop
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} for 3 -1 roll pop exch
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} .internalbind def
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/.bigstring { % <size> .bigstring <string|bytestring>
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count 1 lt { /.bigstring cvx /stackunderflow signalerror } if
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dup type /integertype ne {
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/.bigstring cvx /typecheck signalerror
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} if
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dup 65400 gt { .bytestring } { string } ifelse
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} .internalbind def
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% ------ HalftoneTypes 6, 10, 16 and HalftoneMode ------ %
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% This code depends on an internal HalftoneType 7 with the following keys:
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% Width, Height, Width2, Height2, TransferFunction:
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% as for HalftoneType 16.
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% Thresholds: a string or bytestring holding the thresholds,
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% (Width x Height + Width2 x Height2) x BitsPerSample / 8 bytes,
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% as for HalftoneType 16 except that the samples may be either
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% 8 or 16 bits wide.
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% BitsPerSample: 8 or 16.
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% Note that this HalftoneType never appears in halftone dictionaries given
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% to sethalftone, only as a component in those given to .sethalftone5,
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% so its numeric value can be chosen ad lib as long as it differs from the
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% other values that are legal in component dictionaries for .sethalftone5
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% (currently only 1 and 3).
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/.makehalftone7 { % <dict> <dict> <source> <Width> <Height>
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% (<Width2> <Height2> | null) <BPS> .makehalftone7
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% <setdict> <dict5> { .sethalftone5 }
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8 dict begin
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/HalftoneType 7 def
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/BitsPerSample exch def
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dup //null eq {
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pop 0
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} {
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/Height2 1 index def /Width2 2 index def mul
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} ifelse 3 1 roll
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/Height 1 index def
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/Width 2 index def
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mul add BitsPerSample 8 idiv mul //.bigstring exec
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% Stack: dict dict source str
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dup type /stringtype eq { readstring } { //.readbytestring exec} ifelse
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not { /sethalftone .systemvar /rangecheck signalerror exit } if
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readonly /Thresholds exch def
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/TransferFunction .knownget { /TransferFunction exch def } if
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% If the original Thresholds was a file, replace it with
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% a new one.
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dup /Thresholds get type /filetype eq {
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dup /Thresholds [ Thresholds ] cvx 0 () .subfiledecode put
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} if
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mark /HalftoneType 5 /Default currentdict end .dicttomark
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{ .sethalftone5 }
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} .internalbind def
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/.sethalftone6 { % <dict> <dict> .sethalftone6 <setdict> <dict5>
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% { .sethalftone5 }
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% Keys: Width, Height, Thresholds, T'Function
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dup /Thresholds get
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1 index /Width get 2 index /Height get
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//null 8 //.makehalftone7 exec
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} .internalbind def
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/.sethalftone10 { % <dict> <dict> .sethalftone10 <setdict> <dict5>
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% { .sethalftone5 }
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% Keys: Xsquare, Ysquare, Thresholds, T'Function
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% Note that this is the only one of these three HalftoneTypes
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% that allows either a file or a string for Thresholds.
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dup /Thresholds get dup type /stringtype eq { 0 () .subfiledecode } if
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1 index /Xsquare get dup 3 index /Ysquare get dup
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8 //.makehalftone7 exec
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} .internalbind def
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/.sethalftone16 { % <dict> <dict> .sethalftone16 <setdict> <dict5>
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% { .sethalftone5 }
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% Keys: Width, Height, Width2, Height2,
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% Thresholds, T'Function
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dup /Thresholds get
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1 index /Width get 2 index /Height get
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3 index /Width2 .knownget { % 2-rectangle case
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4 index /Height2 get
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} { % 1-rectangle case
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//null
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} ifelse 16 //.makehalftone7 exec
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} .internalbind def
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.halftonetypes begin
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6 //.sethalftone6 def
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10 //.sethalftone10 def
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16 //.sethalftone16 def
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end
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% Redefine the halftone-setting operators to honor HalftoneMode.
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/setcolorscreen {
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/HalftoneMode getuserparam 0 eq {
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//setcolorscreen
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} {
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12 { pop } repeat //.getdefaulthalftone exec
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currentglobal
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true setglobal
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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setglobal
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} ifelse
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} odef
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/setscreen {
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/HalftoneMode getuserparam 0 eq {
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//setscreen
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} {
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pop pop pop //.getdefaulthalftone exec
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currentglobal
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true setglobal
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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setglobal
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} ifelse
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} odef
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/sethalftone {
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/HalftoneMode getuserparam 0 eq {
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//sethalftone
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} {
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pop
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currentglobal
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true setglobal
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//.getdefaulthalftone exec
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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setglobal
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} ifelse
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} odef
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% ------ ImageTypes 3 and 4 (masked images) ------ %
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% Put the new data source in the requested dictionary.
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% Copy the updated dictionary because it nay be used elsewhere.
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% <dict> <data> <name> update_image3 <dict'>
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/update_image3 {
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3 -1 roll dup length dict copy dup % [data] /name <<image>> <<image>>
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2 index get % [data] /name <<image>> <<sub-image>>
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dup length dict copy dup % [data] /name <<image>> <<sub-image>> <<sub-image>>
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/DataSource 6 -1 roll put % /name <<image>> <<sub-image>>
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exch dup % /name <<sub-image>> <<image>> <<image>>
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4 2 roll % <<image>> <<image>> /name <<sub-image>>
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put % <<image>>
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} .internalbind def
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% Copy mask data source to a reusable stream
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% <dict> <source> buffer_mask <dict> <file>
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/buffer_mask {
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1 index /MaskDict get
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dup /Width get
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1 index /BitsPerComponent get mul 7 add 8 idiv
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exch /Height get mul () /SubFileDecode filter
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/ReusableStreamDecode filter
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} .internalbind def
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% Data type vs. mask type decission table.
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% All procedures have the signature:
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% <image dict> <data DataSource> <mask DataSource> proc <image dict'>
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/data_mask_dict mark
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/stringtype mark % data is a string
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/stringtype { pop pop } bind
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/arraytype { % convert data to proc, don't buffer mask
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pop
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dup type dup /arraytype eq exch /packedarraytype eq or {
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[ exch { 1 array astore cvx } forall ]
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} {
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1 array astore cvx
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} ifelse
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/DataDict //update_image3 exec
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} bind
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/packedarraytype 1 index
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/filetype { % convert data to file, don't buffer mask
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pop
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dup type dup /arraytype eq exch /packedarraytype eq or {
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[ exch { 1 array astore cvx 0 () /SubFileDecode filter } forall ]
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} {
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1 array astore cvx 0 () /SubFileDecode filter
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} ifelse
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/DataDict //update_image3 exec
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} .internalbind
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.dicttomark readonly
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/arraytype mark % data is a proc
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/stringtype { % convert mask to proc
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exch pop
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1 array astore cvx
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/MaskDict //update_image3 exec
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} .internalbind
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/arraytype { % buffer mask in reusable stream and convert back to proc
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exch pop
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//buffer_mask exec
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500 string
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{ readstring pop } aload pop
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4 packedarray cvx
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/MaskDict //update_image3 exec
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} .internalbind
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/packedarraytype 1 index
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/filetype 1 index
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.dicttomark readonly
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/packedarraytype 1 index
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/filetype mark % data is a file
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/stringtype { % convert mask to file
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exch pop
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1 array astore cvx 0 () /SubFileDecode filter
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/MaskDict //update_image3 exec
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} .internalbind
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/arraytype { % buffer the mask and convert to file
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exch pop
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//buffer_mask exec
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/MaskDict //update_image3 exec
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} .internalbind
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/packedarraytype 1 index
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/filetype {
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//systemdict /userdict get /PDFTopSave known {
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pop pop % mask is already buffered by PDF interpreter
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} {
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exch pop % buffer the mask
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//buffer_mask exec
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/MaskDict //update_image3 exec
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} ifelse
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} .internalbind
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.dicttomark readonly
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.dicttomark readonly def
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.imagetypes
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dup 3 {
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dup /InterleaveType get 3 eq {
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% .image3 requires data sources of the image and mask to be of the
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% same type. Work around this restriction here.
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dup /DataDict get /DataSource get
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1 index /MaskDict get /DataSource get % <<>> data mask
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dup type % <<>> data mask mask_type
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2 index
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4 index /DataDict get /MultipleDataSources .knownget {
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{ 0 get } if
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} if
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type % <<>> data mask mask_type data_type
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//data_mask_dict exch .knownget {
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exch .knownget {
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exec
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} {
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pop pop % pass wrong type as is to .image3
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} ifelse
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} {
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pop pop pop % pass wrong type as is to .image3
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} ifelse
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} if
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.image3
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} .internalbind put
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dup 4 /.image4 load put
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% We also detect ImageType 103 here: it isn't worth making a separate file
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% just for this.
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/.image3x where { pop dup 103 /.image3x load put } if
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pop
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currentdict /data_mask_dict undef
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currentdict /update_image3 undef
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currentdict /buffer_mask undef
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% ------ Functions ------ %
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% Define the FunctionType resource category.
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/Generic /Category findresource dup maxlength 3 add dict .copydict begin
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/InstanceType /integertype def
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/FunctionType currentdict end /Category defineresource pop
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{0 2 3} { dup /FunctionType defineresource pop } forall
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% ------ Smooth shading ------ %
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% Define the ShadingType resource category.
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/Generic /Category findresource dup maxlength 3 add dict .copydict begin
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/InstanceType /integertype def
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/ShadingType currentdict end /Category defineresource pop
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systemdict /.shadingtypes mark % not ll3dict
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1 /.buildshading1 load
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2 /.buildshading2 load
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3 /.buildshading3 load
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4 /.buildshading4 load
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5 /.buildshading5 load
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6 /.buildshading6 load
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7 /.buildshading7 load
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.dicttomark put
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systemdict /.reuseparamdict mark
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/Intent 2
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/AsyncRead //false
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/CloseSource //true
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.dicttomark readonly put
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/.buildshading { % <shadingdict> .buildshading <shading>
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dup rcheck not {
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% Adobe seems to access ColorSpace first and CET 12-14c checks this.
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/$error .systemvar /errorinfo [ /ColorSpace //null ] put
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/shfill .systemvar /invalidaccess signalerror
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} if
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% Unfortunately, we always need to make the DataSource reusable,
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% because if clipping is involved, even shfill may need to read
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% the source data multiple times. If it weren't for this,
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% we would only need to create a reusable stream if the ultimate
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% source of the data is a procedure (since the library can't
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% suspend shading to do a procedure callout).
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dup /DataSource .knownget {
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dup type /filetype eq {
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|
//.reuseparamdict /ReusableStreamDecode filter
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|
% Copy the dictionary to replace the DataSource, but make sure the
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% copy is in the same VM as the original.
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.currentglobal 2 index gcheck .setglobal
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% Stack: shdict rsdfile saveglobal
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|
2 index dup length dict copy exch .setglobal
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|
dup /DataSource 4 -1 roll put exch pop
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|
} {
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pop
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|
} ifelse
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} if
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|
% The .buildshading operators use the current color space
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|
% for ColorSpace.
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|
dup /ShadingType .knownget not { % error handling for CET 12-14b conformance
|
|
/$error .systemvar /errorinfo [ /ShadingType //null ] put
|
|
/shfill .systemvar /undefined signalerror
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|
} if
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|
dup type /integertype ne {
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|
/$error .systemvar /errorinfo [ /ShadingType 4 index ] put
|
|
/shfill .systemvar /typecheck signalerror
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|
} if
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|
//.shadingtypes 1 index .knownget not {
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/$error .systemvar /errorinfo [ /ShadingType 4 index ] put
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|
/shfill .systemvar /rangecheck signalerror
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|
} if
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|
exch pop 1 index /ColorSpace .knownget {
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|
{ setcolorspace } stopped {
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|
/$error .systemvar /errorinfo [ /ColorSpace 4 index ] put
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|
/shfill .systemvar /$error .systemvar /errorname get signalerror
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|
} if
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exec
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} {
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|
/$error .systemvar /errorinfo [ /ColorSpace //null ] put
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|
/shfill .systemvar /undefined signalerror
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|
} ifelse
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|
} .internalbind def
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|
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/.buildshading_and_shfill {
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|
//.buildshading exec .shfill
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|
} bind def
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|
|
|
systemdict /.reuseparamdict undef
|
|
|
|
/.buildpattern2 { % <template> <matrix> .buildpattern2
|
|
% <template> <pattern>
|
|
% We want to build the pattern without doing gsave/grestore,
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|
% since we want it to load the CIE caches.
|
|
1 index /Shading get
|
|
mark currentcolor currentcolorspace
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|
counttomark 4 add -3 roll mark 4 1 roll
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|
% Stack: -mark- ..color.. cspace -mark- template matrix shadingdict
|
|
{ //.buildshading exec} stopped {
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|
cleartomark setcolorspace setcolor pop stop
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|
} if
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|
.buildshadingpattern
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|
3 -1 roll pop counttomark 1 add 2 roll setcolorspace setcolor pop
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} .internalbind def
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|
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|
.patterntypes
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|
2 //.buildpattern2 put
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|
|
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/shfill { % <shadingdict> shfill -
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|
% Currently, .shfill requires that the color space
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% in the pattern be the current color space.
|
|
% Disable overprintmode for shfill
|
|
{ dup gsave 0 .setoverprintmode .buildshading_and_shfill } stopped
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|
grestore {
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|
/$error .systemvar /errorinfo 2 copy known {
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|
pop pop
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|
} {
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|
//null put % CET 12-14c
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} ifelse
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|
stop
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|
} if
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|
pop
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|
} odef
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|
|
|
% Establish an initial smoothness value that matches Adobe RIPs.
|
|
0.02 setsmoothness
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|
|
|
% ------ DeviceN color space ------ %
|
|
% gs_res.ps uses these entries in colorspacedict
|
|
% to populate the ColorSpaceFamily resource, so we need
|
|
% to add the supported spaces.
|
|
%
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|
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
|
|
% read-only, so use .forceput
|
|
pssystemparams /MaxDisplayAndSourceList 160000 .forceput
|
|
|
|
% 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
|
|
|
|
% undefine things defined (or used) in this file and not referenced elsewhere
|
|
[
|
|
/.buildpattern2
|
|
/.buildshading
|
|
/.buildshading1 /.buildshading2 /.buildshading3 /.buildshading4
|
|
/.buildshading5 /.buildshading6 /.buildshading7 /.buildshadingpattern
|
|
/.makehalftone7 /.sethalftone6 /.sethalftone10 /.sethalftone16
|
|
/.readbytestring /.bigstring
|
|
]
|
|
dup currentdict .undefinternalnames
|
|
systemdict .undefinternalnames
|
|
|
|
end % ll3dict
|