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% Copyright (C) 1997, 2000 Aladdin Enterprises. 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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% For more information about licensing, please refer to
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% http://www.ghostscript.com/licensing/. For information on
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% commercial licensing, go to http://www.artifex.com/licensing/ or
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% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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% $Id: gs_ll3.ps,v 1.20 2003/10/22 11:22:29 alexcher Exp $
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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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/IdiomSet findresource
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false exch {
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% Stack: proc false dummykey [template substitute]
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exch pop dup 1 get exch 0 get
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% Stack: proc false substitute template
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3 index .eqproc {
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2 index gcheck 1 index gcheck not and {
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pop
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} {
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3 -1 roll pop exch not exit
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} ifelse
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} {
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pop
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} ifelse
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} forall { exit } if
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} //.bindscratch /IdiomSet resourceforall
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} if
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} odef
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currentdict /.bindscratch .undef
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DELAYBIND NOBIND or not {
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/bind /.bind load def
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} if
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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
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% Stack: dict dict source str
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dup type /stringtype eq { readstring } { .readbytestring } ifelse
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not { /sethalftone load /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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} bind def
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/.bigstring { % <size> .bigstring <string|bytestring>
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dup 65400 gt { .bytestring } { string } ifelse
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} bind def
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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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} bind 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
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} bind 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
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} bind 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
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} bind def
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.halftonetypes begin
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6 /.sethalftone6 load def
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10 /.sethalftone10 load def
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16 /.sethalftone16 load 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
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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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
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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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 .getdefaulthalftone
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{ //sethalftone }
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{ .setdefaulthalftone }
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ifelse
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} ifelse
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} odef
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% ------ ImageTypes 3 and 4 (masked images) ------ %
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.imagetypes
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dup 3 /.image3 load 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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% ------ 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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% 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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.currentglobal 1 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 get //.shadingtypes exch get
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1 index /ColorSpace get setcolorspace exec
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} bind def
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systemdict /.reuseparamdict undef
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/.buildpattern2 { % <template> <matrix> .buildpattern2
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% <template> <pattern>
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% We want to build the pattern without doing gsave/grestore,
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% since we want it to load the CIE caches.
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1 index /Shading get
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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
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{ .buildshading } 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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} bind def
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.patterntypes
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2 /.buildpattern2 load put
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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.
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% Disable overprintmode for shfill
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dup gsave
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grestore { stop } if
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pop
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} odef
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% Establish an initial smoothness value that matches Adobe RIPs.
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0.02 setsmoothness
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% ------ DeviceN color space ------ %
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%% Replace 1 (gs_ciecs3.ps)
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(gs_ciecs3.ps) runlibfile
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%% Replace 1 (gs_devn.ps)
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(gs_devn.ps) runlibfile
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% ------ Miscellaneous ------ %
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% Make the setoverprintmode and currentoverprintmode operators visible (3015)
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% Because of the requirements of PDF, the .currentoverprintmode and
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% .setoverprintmode operators have integer parameters. Thus wee need to
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% convert the Postscript bool parameters to integers.
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%
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/setoverprintmode % bool setoverprint -
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{
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{ 1 } { 0 } ifelse % convert bool to integer
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//.setoverprintmode
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} odef
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/currentoverprintmode % - currentoverprintmode bool
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{
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//.currentoverprintmode
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} odef
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% Define additional user and system parameters.
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/HalftoneMode 0 .definepsuserparam
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/MaxSuperScreen 1016 .definepsuserparam
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pssystemparams begin % read-only, so use .forcedef
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/MaxDisplayAndSourceList 160000 .forcedef
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end
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% Define the IdiomSet resource category.
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{ /IdiomSet } {
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/Generic /Category findresource dup maxlength 3 add dict .copydict begin
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/InstanceType /dicttype def
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currentdict end /Category defineresource pop
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} forall
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/languagelevel 3 def
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% When running in LanguageLevel 3 mode, this interpreter is supposed to be
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% compatible with Adobe version 3010.
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/version (3010) readonly def
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.setlanguagelevel
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end % ll3dict
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