142 lines
4.5 KiB
PostScript
142 lines
4.5 KiB
PostScript
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% Copyright (C) 1997, 1999 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_dps1.ps,v 1.4 2002/02/21 21:49:28 giles Exp $
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% Initialization file for most of the Display PostScript functions
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% that are also included in Level 2.
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level2dict begin
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% ------ Virtual memory ------ %
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/currentshared /.currentglobal load def
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/scheck /.gcheck load def
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%****** FOLLOWING IS WRONG ******
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/shareddict currentdict /globaldict .knownget not { 20 dict } if def
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% Global and LocalFontDirectory must remain in systemdict
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% even if we temporarily exit Level 2 mode.
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end % level2dict
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systemdict begin
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/SharedFontDirectory .FontDirectory .gcheck
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{ .currentglobal false .setglobal
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/LocalFontDirectory .FontDirectory dup maxlength dict copy
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.forcedef % LocalFontDirectory is local, systemdict is global
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.setglobal .FontDirectory
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}
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{ /LocalFontDirectory .FontDirectory
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.forcedef % LocalFontDirectory is local, systemdict is global
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50 dict
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}
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ifelse def
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end % systemdict
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level2dict begin
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% setshared must rebind FontDirectory to the appropriate one of
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% Local or SharedFontDirectory.
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/.setglobal % <bool> .setglobal -
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{ dup .setglobal
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//systemdict /FontDirectory .currentglobal
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{ //SharedFontDirectory }
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{ /LocalFontDirectory .systemvar } % can't embed ref to local VM
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ifelse .forceput pop % LocalFontDirectory is local, systemdict is global
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} .bind odef % must bind .forceput and .setglobal
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% even if NOBIND in effect
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% Don't just copy (load) the definition of .setglobal:
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% it gets redefined for LL3.
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/setshared { /.setglobal .systemvar exec } odef
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.currentglobal setshared
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% See below for changes in save and restore.
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% ------ Fonts ------ %
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/selectfont % <fontname> <size> selectfont -
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{ 1 index findfont
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1 index dup type /arraytype eq { makefont } { scalefont } ifelse
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setfont pop pop
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} odef
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% undefinefont has to take local/global VM into account.
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/undefinefont % <fontname> undefinefont -
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{ .FontDirectory 1 index .undef
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.currentglobal
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{ % Current mode is global; delete from local directory too.
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//systemdict /LocalFontDirectory .knownget
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{ 1 index .undef }
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if
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}
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{ % Current mode is local; if there was a shadowed global
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% definition, copy it into the local directory.
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//systemdict /SharedFontDirectory .knownget
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{ 1 index .knownget
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{ .FontDirectory 2 index 3 -1 roll put }
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if
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}
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if
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}
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ifelse pop
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} odef
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% If we load a font into global VM within an inner save, the restore
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% will delete it from FontDirectory but not from SharedFontDirectory.
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% We have to handle this by making restore copy missing entries from
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% SharedFontDirectory to FontDirectory. Since this could slow down restore
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% considerably, we define a new operator .dictcopynew for this purpose.
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% Furthermore, if FAKEFONTS is in effect, we want global real fonts to
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% override fake local ones. We handle this by brute force.
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/restore % <save> restore -
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{ dup //restore % bind even if NOBIND
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/LocalFontDirectory .systemvar
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FAKEFONTS
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{ mark
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% We want to delete a fake font from the local directory
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% iff the global directory now has no definition for it,
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% or a non-fake definition.
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1 index dup
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{ % Stack: lfd mark lfd key ... lfd key value
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length 1 gt
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{ % This is a real local definition; don't do anything.
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pop
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}
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{ % This is a fake local definition, check for global.
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//SharedFontDirectory 1 index .knownget
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{ % A global definition exists, check for fake.
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length 1 eq { pop } { 1 index } ifelse
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}
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{ % No global definition, delete the local one.
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1 index
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}
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ifelse
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}
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ifelse
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} forall
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pop counttomark 2 idiv { .undef } repeat pop
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}
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if
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//SharedFontDirectory exch .dictcopynew pop
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.currentglobal .setglobal % Rebind FontDirectory according to current VM.
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pop
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} bind odef
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% ------ Miscellaneous ------ %
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/undef /.undef load def
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end % level2dict
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