104 lines
3 KiB
PostScript
104 lines
3 KiB
PostScript
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% Copyright (C) 1999, 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_trap.ps,v 1.6 2002/06/02 12:03:28 mpsuzuki Exp $
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% PostScript LanguageLevel 3 in-RIP trapping support.
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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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% ------ Trapping ------ %
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% The PostScript-level trapping parameters are maintained in userdict,
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% and explicitly reinstalled upon restore.
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/Trapping mark
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/settrapparams dup { % <paramdict> settrapparams -
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/.trapparams .uservar dup length dict .copydict
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dup 2 index {
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% Stack: paramdict olddict olddict key value
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2 index 2 index known { put dup } { pop pop } ifelse
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} forall pop
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dup .settrapparams % Let the operator check parameter validity.
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.userdict /.trapparams 3 -1 roll put pop
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} bind .makeoperator
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/.copyparams { % <obj> .copyparams <obj'>
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dup type /dicttype eq {
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dup length dict .copydict
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dup {
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.copyparams 3 copy put pop pop
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} forall
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} {
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dup type /arraytype eq {
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[ exch { .copyparams } forall ]
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} if
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} ifelse
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} odef
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/currenttrapparams dup { % - currenttrapparams <paramdict>
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/.trapparams .uservar .copyparams
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} bind .makeoperator
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/settrapzone dup { % - settrapzone -
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% ****** DUMMY ******
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newpath
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} bind .makeoperator
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% Define initial (dummy) trapping parameters.
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% These values are mostly complete guesses.
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userdict /.trapparams mark
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/BlackColorLimit 1.0
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/BlackDensityLimit 1.0
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/BlackWidth 1.0
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/ColorantZoneDetails 0 dict
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/Enabled true
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/HalftoneName null
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/ImageInternalTrapping false
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/ImagemaskTrapping true
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/ImageResolution 1
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/ImageToObjectTrapping true
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/ImageTrapPlacement /Center
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/SlidingTrapLimit 1.0
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/StepLimit 1.0
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/TrapColorScaling 0.0
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/TrapSetName null
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/TrapWidth 1.0
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.dicttomark readonly put
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.dicttomark /ProcSet defineresource pop
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% Define the InkParams and TrapParams resource categories.
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{ /InkParams /TrapParams } {
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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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% Define the TrappingType 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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/TrappingType currentdict end /Category defineresource pop
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{1001} { dup /TrappingType defineresource pop } forall
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.setlanguagelevel
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end % ll3dict
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