ref: 290c921d1d01119b7d4550770da06c491508508f
dir: /sys/src/cmd/gs/lib/addxchar.ps/
% Copyright (C) 1999 Aladdin Enterprises. 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.
%
% For more information about licensing, please refer to
% http://www.ghostscript.com/licensing/. For information on
% commercial licensing, go to http://www.artifex.com/licensing/ or
% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
% $Id: addxchar.ps,v 1.4 2002/02/21 21:49:28 giles Exp $
% Add the Central European and other Adobe extended Latin characters to a
% Type 1 font.
% Requires -dWRITESYSTEMDICT to disable access protection.
(type1ops.ps) runlibfile
% ---------------- Utilities ---------------- %
/addce_dict 50 dict def
addce_dict begin
% Define the added copyright notice.
/addednotice (. Portions Copyright (C) 1999 Aladdin Enterprises.) def
% Open a font for modification by removing the FID and changing the
% FontName. Removing UniqueID and XUID is not necessary, since we
% will only be adding characters.
/openfont { % <name> <font> openfont <name> <font'>
dup length dict copy
dup /FID undef
dup /FontName 3 index put
} def
% Do the equivalent of false charpath for a glyph.
% This should really be an operator!
/glyphpath { % <glyph> glyphpath -
currentfont /Encoding get 0 3 -1 roll put
<00> false charpath
} def
% Do the equivalent of charpath + pathbbox for a glyph.
/glyphbbox { % <glyph> glyphbbox <llx> <lly> <urx> <ury>
% We cache this value, because it's expensive to compute.
BBoxes 1 index .knownget {
exch pop
} {
gsave newpath 0 0 moveto dup glyphpath [pathbbox] grestore
BBoxes 3 -1 roll 2 index put
} ifelse aload pop
} def
% Get the side bearing and width for a glyph.
/glyphsbw { % <glyph> glyphsbw <lsbx> <wx>
% We cache this value, because it's expensive to compute.
SBW 1 index .knownget {
exch pop
} {
dup glyphcs { dup /hsbw eq { pop exit } if } forall
2 array astore
SBW 3 -1 roll 2 index put
} ifelse aload pop
} def
% Get the CharString for a glyph, as an array.
/glyphcs { % <glyph> glyphcs <array>
CharStrings exch get
4330 exch dup length string .type1decrypt exch pop
dup length lenIV sub lenIV exch getinterval
0 () /SubFileDecode filter [ exch charstack_read ]
} def
% Find an occurrence of a value in an array.
/asearch { % <array> <value> asearch <index> true
% <array> <value> asearch false
false 0 4 2 roll exch {
% Stack: false index value element
2 copy eq { pop pop exch not exch dup exit } if
exch 1 add exch
} forall pop pop
} def
% Convert an array back to a CharString.
/csdef { % <glyph> <array> csdef -
charproc_string
4330 exch dup .type1encrypt exch pop readonly
CharStrings 3 1 roll put
} def
% Split an accented character name.
/splitaccented { % <Baccent> splitaccented <Baccent> <B> <accent>
dup =string cvs
dup 0 1 getinterval cvn
exch dup length 1 sub 1 exch getinterval cvn
} def
% Begin the definition of a 'seac' character.
% Defines accent, base, abox, bbox.
% The initial dx lines up the origins of the base and the accent.
/beginseac { % <bchar> <achar> beginseac
% -mark- <lsbx> <wx> /hsbw <asb> <dx>
/accent exch def /base exch def
/abox [accent glyphbbox] def
/bbox [base glyphbbox] def
[ base glyphsbw /hsbw accent glyphsbw pop
dup 4 index sub
} def
% Center the accent over the base of a 'seac' character.
/centeraccent { % <dx> centeraccent <adx>
bbox 2 get bbox 0 get add 2 div
abox 2 get abox 0 get add 2 div
sub add
} def
% Finish the definition of a 'seac' character.
/finishseac { % <charname> -mark- ... <adx> <ady> finishseac -
exch cvi exch cvi
charindex base get charindex accent get /seac ] csdef
} def
% ---------------- Main program ---------------- %
% Define accented characters that can be made with seac,
% with the accent centered over the character.
/seacchars [
/Abreve /Amacron
/Cacute /Ccaron /Dcaron
/Ecaron /Edotaccent /Emacron
/Gbreve
/Idotaccent /Imacron
/Lacute
/Nacute /Ncaron
/Ohungarumlaut /Omacron
/Racute /Rcaron
/Sacute /Scedilla
/Tcaron
/Uhungarumlaut /Umacron /Uogonek /Uring
/Zacute /Zdotaccent
/abreve /amacron
/cacute /ccaron
/ecaron /edotaccent /emacron
/gbreve
/lacute
/nacute /ncaron
/ohungarumlaut /omacron
/racute /rcaron
/sacute /scedilla
/uhungarumlaut /umacron /uring
/zacute /zdotaccent
] def
% Define seac characters where the accent lines up with the right
% edge of the character.
/seacrightchars [
/Aogonek /Eogonek /Iogonek /aogonek /eogonek /iogonek /uogonek
] def
% Define seac characters where the caron becomes an appended quoteright.
/seaccaronchars [
/dcaron /lcaron /tcaron
] def
% Define seac characters using commaaccent.
/seaccommachars [
/Gcommaaccent /Kcommaaccent /Lcommaaccent /Ncommaaccent /Rcommaaccent
/Scommaaccent /Tcommaaccent
/gcommaaccent /kcommaaccent /lcommaaccent /ncommaaccent /rcommaaccent
/scommaaccent /tcommaaccent
] def
% Define the characters copied from the Symbol font.
/symbolchars [
/Delta /greaterequal /lessequal /lozenge /notequal /partialdiff
/summation
] def
% Define the procedures for editing the commaaccent character.
% Delete all the hints, since it's too hard to adjust them.
/caedit mark
/rmoveto { exch commatop sub cvi exch }
/hstem { pop pop pop }
/vstem 1 index
/callothersubr {
dup 3 eq { 4 { pop } repeat /skip true def } if
}
/pop { skip { pop /skip false def } if }
.dicttomark def
/addce { % <name> <font> addce <font'>
20 dict begin
/origfont 1 index def
openfont
dup /CharStrings 2 copy get dup length dict copy put
dup /Encoding 2 copy get dup length array copy put
dup /FontInfo 2 copy get dup length dict copy put
definefont /font exch def
currentdict font end begin begin
font 1000 scalefont setfont
/symbolfont /Symbol findfont def
/BBoxes CharStrings length dict def
/SBW CharStrings length dict def
/italfactor FontInfo /ItalicAngle .knownget {
neg dup sin exch cos div
} {
0
} ifelse def
% Invert the Encoding (needed for seac).
/charindex 256 dict def
0 1 255 {
charindex exch Encoding 1 index get exch put
} for
% Add the commaaccent character, by moving the comma downward.
/comma glyphbbox /commatop exch def pop pop pop
/comma glyphcs
/skip false def
[ exch { caedit 1 index .knownget { exec } if } forall ]
/commaaccent exch csdef
% Add the accented characters that can be made with seac.
seacchars {
splitaccented beginseac
centeraccent
% If the accent would collide with the base character,
% raise it a little.
abox 1 get bbox 3 get sub dup 0 le {
% ... but not if the accent is in the low position.
abox 1 get 0 gt {
neg 60 add
% Adjust the X position if italic.
dup italfactor mul 3 -1 roll add exch
} {
pop 0
} ifelse
} {
pop 0
} ifelse
finishseac
} forall
seacrightchars {
splitaccented beginseac
bbox 2 get abox 2 get sub add % line up right edges
0 finishseac
} forall
/dcroat /d /hyphen beginseac
bbox 2 get abox 2 get sub add % line up right edges
0 finishseac
/imacron /dotlessi /macron beginseac
centeraccent
0 finishseac
/Lcaron /L /quoteright beginseac
bbox 2 get abox 2 get sub add % line up right edges
0 finishseac
seaccaronchars {
dup =string cvs 0 1 getinterval cvn /quoteright beginseac
% Move the quote to the right of the character.
bbox 2 get abox 0 get sub 50 add add
% Adjust the character width as well.
4 -1 roll abox 2 get abox 0 get sub 50 add add cvi 4 1 roll
0 finishseac
} forall
seaccommachars {
dup =string cvs 0 1 getinterval cvn /comma beginseac
centeraccent
commatop neg
% Lower the accent if the character extends below
% the baseline
bbox 1 get 0 .min add
finishseac
} forall
% Add the characters from the Symbol font.
% We should scale them to match the FontBBox, but we don't.
symbolchars {
symbolfont /CharStrings get 1 index get
CharStrings 3 1 roll put
} forall
% Add the one remaining character.
CharStrings /Dcroat CharStrings /Eth get put
% Recompute the FontBBox, since some of the accented characters
% may have enlarged it.
/llx 1000 def /lly 1000 def /urx 0 def /ury 0 def
CharStrings {
pop glyphbbox
ury .max /ury exch def urx .max /urx exch def
lly .min /lly exch def llx .min /llx exch def
} forall
/FontBBox llx cvi lly cvi urx ceiling cvi ury ceiling cvi 4 packedarray def
% Restore the Encoding and wrap up.
[/Copyright /Notice] {
FontInfo 1 index .knownget {
addednotice concatstrings FontInfo 3 1 roll put
} {
pop
} ifelse
} forall
FontName font openfont
dup /Encoding origfont /Encoding get put
definefont
end end
} def
currentdict end readonly pop % addce_dict
/addce { addce_dict begin addce end } def
% ---------------- Integration ---------------- %
% We would like to patch the font loader so that it adds the extended
% Latin characters automatically. We haven't done this yet.
% ---------------- Test program ---------------- %
/TEST where { pop TEST } { false } ifelse {
/FONT where { pop } { /FONT /Palatino-Italic def } ifelse
(unprot.ps) runlibfile
unprot
(wrfont.ps) runlibfile
wrfont_dict begin
/eexec_encrypt true def
/binary_CharStrings true def
end
save
FONT findfont
/Latin-CE exch addce setfont
(t.ce.pfb) (w) file dup writefont closefile
restore
(prfont.ps) runlibfile
(t.ce.pfb) (r) file .loadfont
/Latin-CE DoFont
quit
} if