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% Copyright (C) 2001-2023 Artifex Software, Inc.
% 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.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
% CA 94129, USA, for further information.
%
% Support code for direct use of TrueType fonts.
% (Not needed for Type 42 fonts.)
% Note that if you want to use this file without including the ttfont.dev
% option when you built Ghostscript, you will need to load the following
% files before this one:
% lib/gs_mgl_e.ps
% lib/gs_mro_e.ps
% lib/gs_wan_e.ps
% Thanks to B. Jackowski and GUST (the Polish TeX Users' Group) for
% the glyf-splitting code.
% ---------------- Font loading machinery ---------------- %
% Augment the FONTPATH machinery so it recognizes TrueType fonts.
/.scanfontheaders where { /.scanfontheaders [ /.scanfontheaders .systemvar aload pop (\000\001\000\000*) (true*) (wOFF*) ] put} if
% ---------------- Automatic Type 42 generation ---------------- %
% Load a TrueType font from a file as a Type 42 PostScript font.
% The thing that makes this really messy is the handling of encodings.
% There are 2 interacting tables that affect the encoding:
% 'cmap' provides multiple maps from character codes to glyph indices
% 'post' maps glyph indices to glyph names (if present)
% What we need to get out of this is:
% Encoding mapping character codes to glyph names
% (the composition of cmap and post)
% CharStrings mapping glyph names to glyph indices
% (the inverse of post)
% If the post table is missing, we have to take a guess based on the cmap
% table.
/.loadttfontdict 50 dict dup begin
/orgXUID AladdinEnterprisesXUID def/maxstring 32764 def % half the maximum length of a PostScript string,
% must be a multiple of 4 (for hmtx / loca / vmtx)
/.invert_encoding % <array> invert_encoding <dict>
{ dup 256 dict exch 0 exch 1 exch length 1 sub { % [] <> i
dup 3 index exch get % [] <> i v
dup /.notdef ne { exch 2 index 2 index .knownget { dup type /arraytype eq { [ exch aload pop counttomark 2 add -1 roll ] } { exch 2 array astore } ifelse } if 2 index 3 1 roll put } { pop pop } ifelse } for exch pop} .forcebind def
% Make /MacRomanEncodingForTrueType including additional
% characters in Mac OS Roman encoding, which is missing
% in /MacRomanEncoding. See PDF spec 1.7, p. 431 or
% "Inside Macintosh: Text" 1-55, Figure 1-36.
% This is useful to exploit the glyphs via Apple Roman
% TrueType cmap subtable, but not appropriate for information
% interchange.
/MacRomanEncodingForTrueType /MacRomanEncoding .findencoding dup length array copy << /notequal 173 /infinity 176 /lessequal 178 /greaterequal 179 /partialdiff 182 /summation 183 /product 184 /pi 185 /integral 186 /Omega 189 /radical 195 /approxequal 197 /Delta 198 /lozenge 215 /Euro 219 /apple 240 >> { TTFDEBUG { (Extend MacRomanEncodingForTrueType for TrueType: ) =only } if
% check /.notdef to avoid overwriting
2 index 1 index get dup /.notdef eq { TTFDEBUG { (insert /) =only 2 index =only ( @ ) =only 1 index //== exec } if pop exch 2 index 3 1 roll put } { TTFDEBUG { (cannot insert /) =only 2 index =only ( @ ) =only 1 index =only ( used for ) =only dup //== exec } if pop pop pop } ifelse } forall aload pop 256 packedarray 5 1 index .registerencoding.defineencoding
% Define the Macintosh standard mapping from characters to glyph indices.
/MacRomanEncoding dup .findencoding def/MacGlyphEncoding dup .findencoding def/MacRomanEncodingForTrueType dup .findencoding def
% Invert the MacRomanEncoding.
/.romanmacdict MacRomanEncodingForTrueType .invert_encoding def/.latin1isodict ISOLatin1Encoding .invert_encoding def
% Define remapping for misnamed glyphs in TrueType 'post' tables.
% There are probably a lot more than this!
/postremap mark /Eoverdot /Edotaccent /eoverdot /edotaccent.dicttomark readonly def
% Array used for fast pre-filling of cmap array
/.array1024z [ 1024 { 0 } repeat ] def
% ---- Utilities ---- %
% Define a serial number for creating unique XUIDs for TrueType fonts.
% We used to use the checkSumAdjustment value from the font, but this is
% not reliable, since some fonts don't set it correctly.
% Note that we must do this in a string to make it immune to save/restore.
% handle 64 bit integer objects
/xuidstring 16#ffffffff 0 gt{ <8000000000000000>}{ <80000000>} ifelse def/curxuid { % - curxuid <int>
//.getCPSImode //false //.setCPSImode 0 xuidstring { exch 8 bitshift exch add } forall % for tbe benefit of pdfwrite/ps2write we want the resulting XUID contents
% to fit into a 32 bit value
16#ffffffff 0 gt { 16#ffffffff idiv } if exch //.setCPSImode} .forcebind def/nextxuid { % - nextxuid -
3 -1 0 { xuidstring 1 index 2 copy get dup 255 ne { 1 add put pop exit } if pop 0 put pop } for} .internalbind def
% <string> <index> getu16 <integer>
/getu16 { 2 copy get 8 bitshift 3 1 roll 1 add get add} .forcebind def
% <string> <index> gets16 <integer>
/gets16 { getu16 16#8000 xor 16#8000 sub} .forcebind def
% <string> <index> getu32 <integer>
/getu32 { 2 copy getu16 16 bitshift 3 1 roll 2 add getu16 add} .forcebind def
% <string> <index> gets32 <integer>
/gets32 { 2 copy gets16 16 bitshift 3 1 roll 2 add getu16 add} .bind def
% <string|array> <index> getu16 <integer>
/getu16a { 2 getinterval_from_stringarray 0 getu16} .forcebind def
% <string|array> <index> gets16 <integer>
/gets16a { 2 getinterval_from_stringarray 0 gets16} .forcebind def
% <string|array> <index> getu32a <integer>
/getu32a { 4 getinterval_from_stringarray 0 getu32} .forcebind def
% <string|array> <index> gets32a <integer>
/gets32a { 4 getinterval_from_stringarray 0 gets32} .bind def
16#ffffffff 0 gt { % 64-bit sign extension
{ /gets32 /gets32a} { mark 1 index load aload pop { 16#80000000 xor 16#80000000 sub } aload pop //.packtomark exec cvx def } .bind forall} if
% <string> <index> <integer> putu16 -
/putu16 { 3 copy -8 bitshift put exch 1 add exch 16#ff and put} .forcebind def
% <string> <index> <integer> putu32 -
/putu32 { 3 copy -16 bitshift putu16 exch 2 add exch 16#ffff and putu16} .forcebind def
% <nametable> <nameid> findname <string> true
% <nametable> <nameid> findname false
/findname { TTFDEBUG { (findname: ) print dup =only } if [ //false 4 2 roll { 0 1 3 index 2 getu16 1 sub { % Stack: false table id index
12 mul 6 add 2 index exch 12 % Check the table is actually long enough to contain the requested index
1 index add 2 index length gt { /pdfformaterror where { ( **** TrueType font has malformed name table.\n) exch /pdfformaterror get exec PDFSTOPONERROR { /.loadpdfttfont cvx /invalidfont signalerror } if } if pop pop exit } if 12 getinterval dup 6 getu16 2 index eq 1 index 8 getu16 0 ne and { % We found the name we want.
exch pop % Stack: false table record
dup 10 getu16 2 index 4 getu16 add 1 index 8 getu16 4 -1 roll 3 1 roll 3 copy add 1 index length le { pop getinterval exch % Stack: false string record
% Check for 8- vs. 16-bit characters.
is2byte { //true } { dup is2byte2 } ifelse { string2to1 } if //true //null 4 -1 roll exit } { pop pop pop pop //false exit } ifelse } if pop } for } stopped { cleartomark //false } { pop pop counttomark 1 add -1 roll pop } ifelse TTFDEBUG { dup { ( = ) print 1 index //== exec } { ( not found) = } ifelse } if} .forcebind def
% <namerecord> is2byte <bool>
/is2byte { dup 0 getu16 { { pop //true } % Apple Unicode
{ pop //false } % Macintosh Script manager
{ 1 getu16 1 eq } % ISO
{ 1 getu16 1 eq } % Microsoft
{ pop //false } % default - *MUST* be last
} % check for a valid Platform ID, if we don't get one, assume single byte encoding
dup length 1 sub 2 index lt {exch pop dup length 1 sub}{exch} ifelse get exec} .forcebind def
% <string> is2byte2 <bool>
/is2byte2 { dup length dup 2 mod 0 ne { pop pop //false } { % s l
//true exch % s b l
1 sub 0 exch 2 exch { 2 index exch get 0 ne { pop //false exit } if } for exch pop } ifelse} .forcebind def
% <string2> string2to1 <string>
/string2to1 { dup length 2 idiv string dup 0 1 3 index length 1 sub { 3 index 1 index 2 mul 1 add get put dup } for pop exch pop} .forcebind def
% Each procedure in this dictionary is called as follows:
% <encodingtable> proc <glyph dictionary>
/cmapformats mark 0 { % Apple standard 1-to-1 mapping.
6 256 getinterval_from_stringarray mark 0 3 -1 roll { 1 index 1 add } forall pop .dicttomark } .forcebind 2 { % Apple 16bit CJK (ShiftJIS etc)
% /sHK_sz subHeaderKey_size % 1 * uint16
% /sH_sz subHeader_size % 4 * uint16
% /sH_len subHeader_length
% /cmapf2_tblen total table length
% /cmapf2_lang language code (not used)
% /sHKs subHeaderKeys
/sHK_sz 2 def /sH_sz 8 def dup 2 getu16a /cmapf2_tblen exch def
dup 4 getu16a /cmapf2_lang exch def
dup 6 256 sHK_sz mul getinterval_from_stringarray /sHKs exch def
0 % initialization value for /sH_len
0 1 255 { sHKs exch 2 mul getu16a 1 index % get current max
1 index % get current subHeaderKey
lt {exch} if pop } for /sH_len exch def
dup 6 256 sHK_sz mul add cmapf2_tblen 1 index sub getinterval_from_stringarray /sH_gIA exch def
/cmapf2_glyph_array 0 dict def
/.cmapf2_putGID { /cmapf2_ch cmapf2_ch_hi 8 bitshift cmapf2_ch_lo add def firstCode cmapf2_ch_lo le cmapf2_ch_lo firstCode entryCount add lt and { % true: j is inside
sH_offset idRangeOffset add % offset to gI
cmapf2_ch_lo firstCode sub 2 mul % rel. pos. in range
add 6 add % offset in sH_gIA
sH_gIA exch getu16a dup 0 gt { %
idDelta add cmapf2_glyph_array exch cmapf2_ch exch put } { pop % cmapf2_glyph_array cmapf2_ch 0 put
} ifelse } { % false: j is outside
% cmapf2_glyph_array cmapf2_ch 0 put
} ifelse } def
16#00 1 16#ff { % hi_byte scan
/cmapf2_ch_hi exch def sHKs cmapf2_ch_hi sHK_sz mul getu16a /sH_offset exch def sH_gIA sH_offset sH_sz getinterval dup 0 getu16a /firstCode exch def dup 2 getu16a /entryCount exch def dup 4 gets16a /idDelta exch def dup 6 getu16a /idRangeOffset exch def pop sH_offset 0 eq { /cmapf2_ch_lo cmapf2_ch_hi def /cmapf2_ch_hi 0 def .cmapf2_putGID } { 16#00 1 16#ff { % lo_byte scan
/cmapf2_ch_lo exch def .cmapf2_putGID } for } ifelse } for pop cmapf2_glyph_array } .forcebind 4 { % Microsoft/Adobe segmented mapping.
/etab exch def /nseg2 etab 6 getu16a def 14 /endc etab 2 index nseg2 getinterval_from_stringarray def % The Apple TrueType documentation omits the 2-byte
% 'reserved pad' that follows the endCount vector!
2 add nseg2 add /startc etab 2 index nseg2 getinterval_from_stringarray def nseg2 add /iddelta etab 2 index nseg2 getinterval_from_stringarray def nseg2 add /idroff etab 2 index nseg2 getinterval_from_stringarray def % The following hack allows us to properly handle
% idiosyncratic fonts that start at 0xf000:
pop /firstcode startc 0 getu16a 16#ff00 and dup 16#f000 ne { pop 0 } if def /putglyph { glyphs code known { glyphs /.cmap_warning_issued known not { (**** Warning: Invalid TTF cmap mapping (overlapping/repeated map)\n) print flush glyphs /.cmap_warning_issued //true put } if pop } {glyphs code 3 -1 roll put}ifelse /code code 1 add def } bind def /glyphs 0 dict def
% neg2 is number of segments x 2. A format 4 cmap, with usable
% mappings cannot (according to the spec) have only 1 segment,
% since format 4 requires a closing segment with start and end
% codes being 0xffff. Unfortunately, we have found badly subsetted
% TTF fonts which have one segment with valid mappings, and no
% closing segment.
% In such a case, force the loop to work as though as we have two
% segments - this works as we don't rely on the terminating segment
% but use the loop counter to spot completion - effrectively, we
% ignore the closing segment when it's present, anyway.
%
% This loop and/or putglyph do not account for out of spec fonts
% that have repeated or overlapping ranges in the segments. As we
% write the code/gid to a PS dictionary, later encounters with a
% given code will overwrite the earlier one(s). As this is outside
% of the spec, it's not clear how other consumers handle this
% condition, so we'll await a suitable example before making changes.
% Two choices are: drop later repeated/overlapping segments entirely,
% or only use codes from later, overlapping segments not already set
% by the earlier segment. (Inspired by Bug 700968).
% Revision: bug 703589 has an (invalid) cmap table with overlapping
% (actually repeating) ranges, and requires the *first* range definition
% to be used in order to render correctly. So /putglyph now refuses to
% overwrite existing keys in the "glyphs" dictionary
0 2 nseg2 dup 4 lt {pop 4}if 3 sub { /i2 exch def /scode startc i2 getu16a def /ecode endc i2 getu16a def % Bug 693538: see above
scode 0 eq ecode 0 eq and not { scode ecode 1 add gt { /ecode scode 1 add def } if % Bug 691326. See above.
/code scode def /delta iddelta i2 gets16a def TTFDEBUG { (scode=) print scode =only ( ecode=) print ecode =only ( delta=) print delta =only ( droff=) print idroff i2 getu16 = } if idroff i2 getu16a dup 0 eq { pop scode delta add 65535 and 1 ecode delta add 65535 and { putglyph } for } { % The +2 is for the 'reserved pad'.
/gloff exch 14 nseg2 3 mul add 2 add i2 add add def 0 1 ecode scode sub { 2 mul gloff add etab exch getu16a dup 0 ne { delta add 65535 and } if putglyph } for } ifelse } if } for % If we've encoutered an invalid table, remove the key before returning
glyphs /.cmap_warning_issued undef glyphs /glyphs //null def % for GC
} .forcebind 6 { % Single interval lookup.
dup 6 getu16a /firstcode exch def dup 8 getu16a /ng exch def ng dict dup % Stack: tab dict dict
% Fill elements firstcode .. firstcode+nvalue-1 with glyph values
0 1 ng 1 sub { dup firstcode add exch 2 mul 10 add 4 index exch getu16a 3 copy put pop pop } for pop exch pop } .forcebind 12 { % Microsoft/Adobe segmented mapping.
/etab exch def /glyphs 0 dict def
0 1 etab 12 getu32a % nGroups
1 sub { /ind exch def /gid etab 12 ind mul 8 add 16 add getu32a def % startGlyphID
etab 12 ind mul 16 add getu32a % startCharCode
1 etab 12 ind mul 4 add 16 add getu32a % endCharCode
{ gid glyphs 3 1 roll put /gid gid 1 add def } for } for glyphs /glyphs //null def % for GC
} .forcebind.dicttomark readonly def % cmapformats
% <cmaptab> cmapdict <glyph dictionary>
/cmapdict { dup 0 getu16a cmapformats exch .knownget { TTFDEBUG { (cmap: format ) print 1 index 0 getu16a = flush } if exec } { (Can't handle format ) print 0 getu16a = flush mark 0 1 255 { dup } for .dicttomark } ifelse TTFDEBUG { (cmap: length=) print dup length = dup === } if} .forcebind def
/get_from_stringarray % <array|string> <offset> get_from_stringarray <int>
{ 1 index type /stringtype eq { get } { exch { % o ()
2 copy length ge { length sub } { exch get exit } ifelse } forall } ifelse} .forcebind def
/getinterval_from_stringarray % <array|string> <offset> <length> getinterval_from_stringarray <string>
{ % May allocate a string in VM.
2 index type /stringtype eq { getinterval } { dup 65535 le { string exch 0 % [] s o p
4 3 roll { % s o p Si
dup length % s o p Si lSi
dup 4 index lt { 3 index exch sub % s o p Si o'
exch pop 3 1 roll exch pop % s o' p
} { % s o p Si lSi
dup 3 1 roll % s o p lSi Si lSi
4 index sub % s o p lSi Si lSi-o
5 index length 4 index sub % s o p lSi Si lSi-o ls-p
2 copy gt { exch } if pop % s o p lSi Si minl
dup 3 1 roll % s o p lSi minl Si minl
5 index exch getinterval % s o p lSi minl from
5 index 4 index 3 index % s o p lSi minl from s p minl
getinterval % s o p lSi minl from to
copy pop % s o p lSi minl
exch pop add exch pop 0 exch % s 0 p'
dup 3 index length ge { exit } if } ifelse } forall pop pop % s
} { [ 4 1 roll { dup 0 eq { pop pop pop exit } if 3 copy dup 65535 ge { pop 65535 } if getinterval_from_stringarray 4 1 roll 3 index length sub exch 3 index length add exch } loop ] } ifelse } ifelse} .forcebind def
/string_array_size % <array|string> string_array_size <int>
{ dup type /stringtype eq { length } { 0 exch { length add } forall } ifelse} .forcebind def
% Each procedure in this dictionary is called as follows:
% posttable <<proc>> glyphencoding
/postformats mark 16#00010000 { % 258 standard Macintosh glyphs.
pop MacGlyphEncoding } 16#00020000 { % Detailed map, required by Microsoft fonts.
dup dup type /arraytype eq { 0 get } if length 36 lt { TTFDEBUG { (post format 2.0 invalid.) = flush } if pop [ ] } { /postglyphs exch def /post_first postglyphs dup type /arraytype eq { 0 get } if def post_first 32 getu16 /numglyphs exch def % Build names array in the order they occur in the 'post' table
/postpos numglyphs 2 mul 34 add def /total_length postglyphs //string_array_size exec def
% the number of names in a post table is not declared up front
% and there are fonts with more names than glyph indices <sigh>
% so we have to pre-process and find the highest index used.
% We start with a base value of numglyphs as it's most common,
% and we can safely have a array that's too large.
% Rather than parse out the indices twice, we store them in an
% array on the stack, which we then reuse, overwriting entries
% as we go later on.
numglyphs array numglyphs postglyphs 0 1 numglyphs 1 sub { dup 2 mul 34 add 2 index exch 2 //getinterval_from_stringarray exec dup 0 get 8 bitshift exch 1 get add dup 5 index exch 4 -1 roll exch put 258 sub dup 3 index gt % if we find a reference to an index higher than the value
% already on the stack, replace the value on the stack
{ 3 -1 roll pop 2 1 roll} {pop} ifelse } for pop 1 add array 0 1 2 index length 1 sub { postpos total_length ge { % Fill the rest with .notdef
1 2 index length 1 sub { 1 index exch /.notdef put } for exit } if % No name available, /postnames will be defined as an empty
% array and the glyph won't get a name attached.
postglyphs postpos //get_from_stringarray exec postglyphs postpos 1 add 2 index 2 copy add total_length gt { TTFDEBUG { (post table ends in the middle of the entry.) print flush } if pop pop pop pop % Fill the rest with .notdef
1 2 index length 1 sub { 1 index exch /.notdef put } for exit } if //getinterval_from_stringarray exec cvn exch postpos add 1 add /postpos exch def 2 index 3 1 roll put } for /postnames exch def % Some TrueType fonts converted by "Windows Type 1 Installer" have
% problematic post table including MacGlyphEncoding entries which
% should be omitted. Such extra entries in the beginning of glyphName
% array make /Encoding broken. If we find populary predefined
% ISOLatin1Encoding glyph name in the post table, empty encoding is
% returned. Some TrueType fonts for Microsoft Windows redefines
% MacGlyphEncoding glyph name out of predefined range). To permit
% such fonts, ISOLatin1Encoding is used to find broken post. Bug 689495.
/.broken_post //false def tabdict /name .knownget { (Windows Type 1 Installer V1.0) search { pop pop pop .latin1isodict postnames { dup /.notdef ne { 2 copy known { TTFDEBUG { (ignore post table that redefines ISOLatin1Encoding glyph name ) print dup //== exec flush } if /.broken_post //true def pop exit } if } if pop } forall pop } { pop } ifelse } if % Loop through the array of name indices we created above.
% This loop replaces name index in the array with the name
% it references.
0 1 2 index length 1 sub { dup 2 index exch get dup 258 lt { MacGlyphEncoding exch get } { 258 sub postnames exch get % At least some of Microsoft's TrueType fonts use incorrect
% (Adobe-incompatible) names for some glyphs.
% Correct for this here.
postremap 1 index .knownget { exch pop } if } ifelse 2 index 3 1 roll put } for
.broken_post { pop [ postnames aload length 1 roll ] } if } ifelse } .forcebind 16#00030000 { % No map.
pop [ ] } .forcebind.dicttomark readonly def % postformats
/call.readtable{ .readtable} .forcebind def/call.readbigtable{ .readbigtable} .forcebind def
% Each procedure in this dictionary is called as follows:
% <file> <length> -proc- <string|array_of_strings>
% Note that each table must have an even length, because of a strange
% Adobe requirement that each sfnts entry have even length.
/readtables mark % Ordinary tables
(head) //call.readtable (hhea) 1 index (maxp) 1 index (name) 1 index (OS/2) 1 index (post) //call.readbigtable (vhea) //call.readtable % Big tables
(cmap) //call.readbigtable (GSUB) //call.readbigtable (glyf) //call.readbigtable (loca) 1 index (hmtx) 1 index (vmtx) 1 index (cvt ) //call.readtable (fpgm) 1 index (prep) 1 index.dicttomark% Normally there would be a 'readonly' here, but the ttf2pf utility wants
% to include the 'kern' table as well, so we leave the readtables dictionary
% writable.
def % readtables
/readtables_stripped readtables dup length dict copydup (loca) { .skiptable } putdup (glyf) { .skiptable } putdef
% Read a table as a single string.
% <file> <length> .skiptable <string>
/.skiptable { pop pop ()} .forcebind def
% Read a table as a single string.
% <file> <length> .readtable <string>
/.readtable { dup dup 1 and add string % Stack: f len str
dup 0 4 -1 roll getinterval % Stack: f str str1
% Because of the absurd PostScript specification that gives an
% error for reading into an empty string, we have to check for
% this explicitly here.
3 -1 roll exch dup () ne { readstring } if pop pop} .forcebind def
% Read a big table (one that may exceed 64K).
% <file> <length> .readbigtable <string[s]>
/.readbigtable { dup 65400 lt { .readtable } { currentuserparams /VMReclaim get -2 vmreclaim [ 4 2 roll { % Stack: mark ... f left
dup maxstring le { exit } if 1 index maxstring string readstring pop 3 1 roll maxstring sub } loop .readtable ] exch vmreclaim } ifelse} .forcebind def
end readonly def % .loadttfontdict
% <tab> .printtab -
/.printtab { dup 0 4 getinterval print ( ) print dup 8 getu32 =only ( ) print 12 getu32 =} .internalbind def
% <file> <bool> <SubfontID> .loadttfonttables -
% Pushes .loadttfontdict & scratch dict on d-stack.
% Defines f, offsets, tables, tabdict, tabs, tthdrlen.
% Skips loca and glyf if <bool> is true.
/.loadttfonttables { //.loadttfontdict begin 40 dict begin /SubfontID exch def /load_stripped exch def /f exch def /offsets f 12 string readstring pop def /tthdrlen offsets length def load_stripped { readtables_stripped } { readtables } ifelse /readtables_ exch def offsets 0 4 getinterval (ttcf) eq { offsets 8 getu32 /num_fonts exch def SubfontID num_fonts ge { QUIET not { (True Type collection contains insufficient fonts.) = } if /.loadttfonttables cvx /invalidfont signalerror } if f SubfontID 4 mul dup 0 ne { () /SubFileDecode filter flushfile } { pop pop } ifelse
f 4 string readstring pop 0 getu32 /ttc_offset exch def
f ttc_offset SubfontID 4 mul sub 16 sub dup 0 ne { () /SubFileDecode filter flushfile } { pop pop } ifelse /offsets f 12 string readstring pop def } { SubfontID 0 gt { QUIET not { (SubfontID > 0 with a True Type file which is not a collection.) = } if /.loadttfonttables cvx /invalidfont signalerror } if /ttc_offset 0 def } ifelse % Peek because table counter may be incorrect.
/tables f offsets 4 getu16 16 mul string .peekstring pop def /tabdict tables length 16 idiv dict def % tabs = tables we want to keep, sorted by file position.
/tabs [ 0 16 tables length 1 sub { tables exch 16 getinterval TTFDEBUG { dup //.printtab exec } if dup 0 4 getinterval readtables_ 1 index known { % put all 0 length tables at 0 to avoid overlap
1 index 12 getu32 0 eq { 1 index 8 0 putu32 } if tabdict exch 2 index put } { pop pop } ifelse } for ] { exch 8 getu32 exch 8 getu32 lt } .sort def % In certain malformed TrueType fonts, tables overlap.
% Truncate tables if necessary.
0 1 tabs length 2 sub { dup tabs exch get exch 1 add tabs exch get 1 index 8 getu32 2 index 12 getu32 add 1 index 8 getu32 gt { (**** Warning: ) print 1 index 0 4 getinterval print ( overlaps ) print dup 0 4 getinterval print (, truncating.) = flush dup 8 getu32 2 index 8 getu32 sub 2 index 12 3 -1 roll putu32 } if pop pop } for} .forcebind def
% <file> <bool> <SubfontID> .loadwofftables -
% Pushes .loadttfontdict & scratch dict on d-stack.
% Defines f, offsets, tables, tabdict, tabs, tthdrlen.
% Skips loca and glyf if <bool> is true.
/.loadwofftables { //.loadttfontdict begin 40 dict begin /SubfontID exch def /load_stripped exch def /f exch def % loading WOFFs "stripped" only works for .findfontvalue - we cannot
% (currently) use a stripped wOFF font
load_stripped { readtables_stripped } { readtables } ifelse /readtables_ exch def /offsets 12 string def /woffhdr f 44 string readstring pop def /tthdrlen woffhdr length def /ttc_offset 0 def woffhdr 0 4 getinterval (wOFF) eq not % allow loading wOFFOTTO fonts "stripped" for .findfontvalue
woffhdr 4 4 getinterval (OTTO) eq load_stripped not and or {/.loadwofftables cvx /invalidfont signalerror} { offsets 0 woffhdr 4 4 getinterval putinterval /tables f woffhdr 12 getu16 20 mul string .peekstring pop def offsets 4 tables length 20 idiv putu16 /tabdict tables length 20 idiv dict def /tabs [ 0 20 tables length 1 sub { tables exch 20 getinterval TTFDEBUG { dup //.printtab exec } if dup 0 4 getinterval readtables_ 1 index known { % put all 0 length tables at 0 to avoid overlap
1 index 12 getu32 0 eq { 1 index 8 0 putu32 } if tabdict exch 2 index put } {pop pop} ifelse }for ] { exch 4 getu32 exch 4 getu32 lt } .sort def } ifelse} .forcebind def
/.file_table_pos_namesmark/glyf 0/loca 0.dicttomark readonly def
% - .readttdata -
% Read data. Updates offsets, tabs; stores data in tabdict.
/.readttdata { /file_table_pos 10 dict def /fpos tthdrlen ttc_offset add def /sfpos offsets length tabs length 16 mul add def offsets 4 tabs length putu16 0 1 tabs length 1 sub { dup tabs exch get dup 0 4 getinterval /tname exch def dup length 20 eq { dup 4 getu32 /tpos exch def dup 8 getu32 /tclen exch def dup 12 getu32 /tlen exch def } { dup 8 getu32 /tpos exch def dup 12 getu32 /tlen exch def /tclen tlen def } ifelse load_stripped //.file_table_pos_names tname known and { pop file_table_pos tname [tpos tlen tclen] put tabdict tname () put pop } { dup length 20 eq { 0 16 getinterval dup 8 sfpos putu32 tabs 3 -2 roll put } {8 sfpos putu32 pop} ifelse % Skip data between the end of the previous table and
% the beginning of this one, if any.
tpos fpos gt { load_stripped { % 'setfileposition' is faster for skipping a big data.
f tpos setfileposition } { f tpos fpos sub () /SubFileDecode filter dup flushfile closefile /fpos tpos def } ifelse } if /ff tlen tclen eq not {f tclen () /SubFileDecode filter /FlateDecode filter} {f tlen () /SubFileDecode filter} ifelse def ff tlen readtables_ tname get exec ff closefile tabdict tname 3 -1 roll put % Round up the table length to an even value.
/sfpos sfpos tlen dup 1 and add add def } ifelse /fpos fpos tclen add def } for} .forcebind def
% Find the string in a list of strings that includes a given index.
% <strings> <index> .findseg <string> <index'>
/.findseg { exch { dup length 2 index gt { exch exit } if length sub } forall} .forcebind def
% - .makesfnts -
% Defines checksum, getloca, head, locatable, numloca, post, sfnts, upem
% Note that the 'loca' table may be out of order.
/.makesfnts { //.readttdata exec /head tabdict /head get def /post tabdict /post .knownget { dup 0 get /post_first_part exch def } { //null } ifelse def load_stripped not { /locatable tabdict /loca get def /numloca locatable dup type /stringtype eq { length } { 0 exch { length add } forall } ifelse % no def yet
locatable type /stringtype eq { /.indexloca {} def } { /.indexloca //.findseg def } ifelse head 50 getu16 0 ne { /getloca { 2 bitshift locatable exch .indexloca getu32 } def 4 idiv 1 sub } { /getloca { dup add locatable exch .indexloca getu16 dup add } def 2 idiv 1 sub } ifelse def % numloca
} { % We did not load loca, take the number of glyphs from maxp.
/numloca tabdict /maxp get 4 getu16 def } ifelse /sfnts [ offsets tabs { concatstrings } forall tabs { 0 4 getinterval tabdict exch get dup type /stringtype ne { aload pop } if } forall ] def} .forcebind odef
/first_post_string % - first_post_string <string>
{ post dup type /arraytype eq { 0 get } if} .internalbind def
% - .getpost -
% Uses post, defines glyphencoding
/.getpost { /glyphencoding post //null eq { TTFDEBUG { (post missing) = flush } if [ ] } { postformats first_post_string 0 getu32 .knownget { TTFDEBUG { (post: format ) print first_post_string dup 0 getu16 =only (,) print 2 getu16 = flush } if post exch exec } { TTFDEBUG { (post: unknown format ) print post 0 getu32 = flush } if [ ] } ifelse } ifelse TTFDEBUG { (post=) print dup //== exec } if def} .forcebind def
% - .ttkeys <key> <value> ...
/.ttkeys { count /ttkeycount exch def /upem head 18 getu16 def /FontMatrix matrix /FontBBox [ 36 2 42 { head exch gets16 upem div } for ] nextxuid tabdict /name .knownget { % Find the names from the 'name' table.
/names exch def /FontName names 6 findname not { names 4 findname not { curxuid 16#ffffffff and 16 32 string cvrs } if } if /fontname 1 index def /FontInfo mark names 0 findname { /Notice exch } if names 1 findname { /FamilyName exch } if names 4 findname { /FullName exch } if names 5 findname { /Version exch } if } { % No name table, fabricate a FontName.
/FontName curxuid 16#ffffffff and 16 32 string cvrs /fontname 1 index def /FontInfo mark } ifelse % Stack: ... /FontInfo mark key1 value1 ...
post //null ne { /ItalicAngle first_post_string 4 gets32 65536.0 div /isFixedPitch first_post_string 12 getu32 0 ne /UnderlinePosition first_post_string 8 gets16 upem div /UnderlineThickness first_post_string 10 gets16 upem div } if counttomark 0 ne { .dicttomark } { pop pop } ifelse /XUID [orgXUID 42 curxuid] TTFDEBUG { tabs { //.printtab exec } forall [ sfnts { length } forall ] //== exec count ttkeycount sub array astore dup { //== exec } forall aload pop } if /sfnts sfnts} .forcebind def
% ---------------- Standard TrueType font loading ---------------- %
% - .pickcmap_with_no_xlatmap -
% Defines cmapsub, cmaptab
/.pickcmap_with_no_xlatmap { tabdict /cmap get % The Apple cmap format is no help in determining the encoding.
% Look for a Microsoft table. If we can't find one,
% just use the first table, whatever it is.
dup 4 8 getinterval_from_stringarray exch % () [] % the default
0 1 2 index 2 getu16a 1 sub { % () [] i
8 mul 4 add 1 index exch 8 getinterval_from_stringarray % () [] ()
TTFDEBUG { (cmap: platform ) print dup 0 getu16 =only ( encoding ) print dup 2 getu16 = flush } if dup 0 getu16 3 eq { exch 3 -1 roll pop exit } if pop } for % Stack: subentry table
/cmapsub 2 index def % () []
exch 4 getu32 1 index string_array_size 1 index sub getinterval_from_stringarray /cmaptab exch def} .forcebind def
% - .pickcmap_with_xlatmap -
% Defines cmapsub, cmaptab
/.pickcmap_with_xlatmap { .xlatmap_dict /TrueType known not { (Emulating a CID font with a True Type file, ) print (the file gs/lib/xlatmap must contain /TrueType key.) = /.pickcmap_with_xlatmap cvx /configurationerror signalerror } if //false .xlatmap_dict /TrueType get dup length 2 sub 0 exch 2 exch { % bool [] i
2 copy get % bool [] i ()
(.) search { % bool [] i post match pre
cvi exch pop exch cvi % bool [] i PlatID SpecID
} { (gs/lib/xlatmap containg a record with an invalid (PlatformID.SpecificID)) = /.pickcmap_with_xlatmap cvx /configurationerror signalerror } ifelse TTFDEBUG { (Seeking a cmap for platform=) print 1 index =only ( encoding=) print dup = } if tabdict /cmap get % bool [] i PlatID SpecID (cmap)
dup /cmaptab exch def % temporary
0 1 2 index 2 getu16a 1 sub { % bool [] i PlatID SpecID (cmap) j
8 mul 4 add 1 index exch 8 getinterval_from_stringarray % bool [] i PlatID SpecID (cmap) (cmapsub)
TTFDEBUG { (cmap: platform ) print dup 0 getu16 =only ( encoding ) print dup 2 getu16 = flush } if dup 0 getu16 4 index eq { dup 2 getu16 3 index eq { % bool [] i PlatID SpecID (cmap) (cmapsub)
TTFDEBUG { (Choosen a cmap for platform=) print 3 index =only ( encoding=) print 2 index = } if /cmapsub 1 index def dup 4 getu32 % bool [] i PlatID SpecID (cmap) (cmapsub) p
cmaptab 1 index getu16a % get cmap format
8 lt { % length for traditional 16bit format 0, 2, 4, 6
cmaptab 1 index 2 add getu16a } { % length for advanced 32bit format 8, 10, 12
cmaptab 1 index 4 add getu32a } ifelse % bool [] i PlatID SpecID (cmap) (cmapsub) p l
cmaptab 3 1 roll getinterval_from_stringarray /cmaptab exch def % bool [] i PlatID SpecID (cmap) (cmapsub)
5 index 5 index 1 add get % bool [] i PlatID SpecID (cmap) (cmapsub) /Decoding
/Decoding exch def % bool [] i PlatID SpecID (cmap) (cmapsub)
7 -1 roll pop //true 7 1 roll % true [] i PlatID SpecID (cmap) (cmapsub)
} if } if pop % true [] i PlatID SpecID (cmap)
5 index { exit } if } for % bool [] i PlatID SpecID (cmap)
pop pop pop pop % bool []
1 index { exit } if } for % bool []
pop % bool
not { QUIET not { (True Type font doesn't contain a charset listed in gs/lib/xlatmap.) = } if /.pickcmap_with_xlatmap cvx /invalidfont signalerror } if %
} .forcebind def
% - .pickcmap -
% Defines cmapsub, cmaptab
/.pickcmap { % Currently we use xlatmap only for emulation CIDFontType 2 with
% a disk True Type font files, and use load_stripped
% to check this regime. We would like to do so
% while emulating a Type 42, but first the old code
% about handling them to be changed
% with adding a handling of a Decoding.
% fixme : A correct way to fix this is to implenent
% the Type 42 emulation with gs_fntem.ps .
% Also note that PDF embedded fonts probably don't need a xlatmap -
% see PDF spec, "Encodings for True Type fonts".
load_stripped { //.pickcmap_with_xlatmap exec } { //.pickcmap_with_no_xlatmap exec } ifelse} .forcebind odefcurrentdict /.pickcmap_with_xlatmap .undefcurrentdict /.pickcmap_with_no_xlatmap .undef
% <glyph> .nname <_name>
/.nname { =string cvs (_) exch concatstrings cvn} .internalbind def
% - .charkeys /CharStrings <charstrings> /Encoding <encoding>
% Resets glyphencoding
/.charkeys { TTFDEBUG { (glyphencoding: length=) print glyphencoding dup length = === flush } if % Hack: if there is no usable post table but the cmap uses
% the Microsoft Unicode encoding, use ISOLatin1Encoding.
% if 'post' presents, .charkeys computes (with dropping minor details) :
% CharStrings = glyphencoding^-1
% Encoding = cmap*glyphencoding
% because 'post' maps glyph indices to glyph names.
% Otherwise .charkeys must compute (with dropping same details) :
% CharStrings = glyphencoding^-1 * cmap
% Encoding = glyphencoding
% because glyphencoding is stubbed with an encoding,
% which maps char codes to glyph names.
glyphencoding length 0 eq { /have_post //false def cmapsub 0 4 getinterval <00030001> eq { TTFDEBUG { (No post but have cmap 3.1, so use ISOLatin1Encoding) = } if /glyphencoding ISOLatin1Encoding dup length array copy def } { TTFDEBUG { (No encoding info, use .GS_extended_SymbolEncoding) = } if /glyphencoding /.GS_extended_SymbolEncoding findencoding dup length array copy def } ifelse } { /have_post //true def } ifelse % If necessary, fabricate additional glyphencoding entries
% to cover all of loca
glyphencoding length numloca lt { /glyphencoding numloca array glyphencoding length dup 1 sub 0 1 3 2 roll { dup glyphencoding exch get 3 index 3 1 roll put } for % /glyphencoding <newarray> <glyphencoding length>
1 numloca 1 sub { 1 index exch dup //.nname exec put } for def } if
/cmapa cmaptab cmapdict def % Some badly designed Chinese fonts have a post table
% in which all glyphs other than 0 are named .null.
% Use CharStrings to keep track of the reverse map from
% names to glyphs, and don't let any name be used for
% more than one glyph.
/CharStrings glyphencoding dup length 1 add dict % +1 for .notdef
0 1 3 index length 1 sub { % Stack: glyphencoding dict index
dup 3 index 1 index get have_post not { exch cmapa exch .knownget not { 0 % a stub for a while. Must skip the entry.
} if exch } if 3 index 1 index known { % The same name maps to more than one glyph. Change the name.
% No special treatment for /.notdef glyph. Bug 689408.
pop //.nname exec 3 index 2 index 2 index put 2 index exch 3 -1 roll put } { 3 index exch 3 -1 roll put % unique name
pop } ifelse } for exch pop % If there is no .notdef entry, map it to glyph 0.
dup /.notdef known not { dup /.notdef 0 put } if
TTFDEBUG { (CharStrings:)= dup { exch =string cvs print ( ) print //== exec } forall } if
% Provide all known aliases for each glyph
cmapsub 0 4 getinterval <00030001> eq % is the cmap table a unicode one?
cmapa //ReverseAdobeGlyphList //AdobeGlyphList { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer)
exch dup 6 index exch .knownget { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) codep(integer) gname(name) gindex(integer)
3 index 3 index .knownget { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) codep(integer) gname(name) gindex(integer) gnames(array)
{ % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) codep(integer) gname(name) gindex(integer) gname(name)
TTFDEBUG { (\n1 setting alias: ) print dup ==only ( to be the same as ) print 2 index //== exec } if
7 index 2 index 3 -1 roll exch put } forall pop pop pop } { pop pop } ifelse } { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer)
exch % Only do this for Unicode cmap table
4 index { dup 4 index exch .knownget { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer) gindex(integer)
exch pop TTFDEBUG { (\n2 setting alias: ) print 1 index ==only ( to use glyph index: ) print dup //== exec } if 5 index 3 1 roll put //false } { //true }ifelse } { //true } ifelse
{ % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer)
16 4 string cvrs dup length neg 7 add (uni0000) dup 4 -2 roll exch putinterval cvn 3 index 1 index .knownget { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer) gindex(integer)
TTFDEBUG { (\3 nsetting alias: ) print 1 index ==only ( to be index: ) print dup //== exec } if exch pop 5 index 3 1 roll put } { pop pop } ifelse } if } ifelse } forall pop pop pop
readonly
/Encoding [ have_post { 0 1 255 { cmapa exch .knownget not { 0 } if glyphencoding dup length 2 index le { pop pop /.notdef } { exch get } ifelse } for } { glyphencoding dup length 256 gt { 0 256 getinterval } if aload pop counttomark 256 exch sub { /.notdef } repeat } ifelse ] TTFDEBUG { (Encoding: ) print dup === flush } if} .forcebind odef
% ---------------- CIDFontType 2 font loading ---------------- %
% Fill a string with sequential CIDs starting from the initial value.
% <string> <value> .fill_identity_cmap <string>
/.fill_identity_cmap { % () v
1 index length 2 sub % () v n-2
0 2 3 2 roll { % () v 0 2 n-1
3 copy exch % () v i () i v
-8 bitshift % () v i () i v>>8
put % () v i
3 copy 1 add % () v i () v i+1
exch 255 and % () v i () i+1 v&255
put % () v i
pop 1 add % () v+1
} for pop} .forcebind def
% <CIDSystemInfo dict> <dict> .definettcidfont <font>
/.definettcidfont { dup begin /CIDFontName fontname def /CIDFontType 2 def /CIDSystemInfo 4 -1 roll def /CharStrings mark /.notdef 0 .dicttomark def % The cmap isn't of any use even if it is present.
% Just construct an identity CIDMap covering all the glyphs.
/CIDCount numloca % Wrong if a CIDFontType2 embedded into PDF with a non-Identity CIDToGIDMap.
def % processCIDToGIDMap may replace.
/CIDMap numloca maxstring le { % Use a single string.
numloca 2 mul string 0 //.fill_identity_cmap exec } { % We must use 2 strings.
maxstring 2 mul string 0 //.fill_identity_cmap exec numloca maxstring sub 2 mul string maxstring //.fill_identity_cmap exec 2 array astore } ifelse def
/GDBytes 2 def end
end end dup /CIDFontName get exch /CIDFont defineresource} .forcebind def
% <CIDSystemInfo dict> <file> <Substite name> .loadttcidfont <cidtype2font>
/.loadttcidfont { exch //false 0 .loadttfonttables .makesfnts % CIDFontType2 fonts don't have a cmap: they are indexed by CID.
mark //.ttkeys exec .dicttomark dup % convert keys to dict and copy dict
3 -1 roll % Bring PDF substitute name to top of stack
dup /fontname exch def /FontName exch put % replace any definition of /FontName
//.definettcidfont exec} .forcebind odef
% <file> <SubfontID> .load_tt_font_stripped <font_data>
% The font_data includes sfnts, NumGlyphs, TT_cmap, file_table_pos, Decoding.
% CIDMap to be created later from TT_cmap.
/.load_tt_font_stripped { //true exch .loadttfonttables .makesfnts .pickcmap mark //.ttkeys exec /NumGlyphs numloca /TT_cmap cmaptab cmapdict /file_table_pos file_table_pos /Decoding Decoding .dicttomark end end} .forcebind def
/.load_woff_for_cid { //false exch //.loadwofftables exec .makesfnts % we have to set load_stripped here so
% .pickcmap will follow the right logic
% for emulating a CIDFont
/load_stripped //true def .pickcmap /load_stripped //false def mark //.ttkeys exec /NumGlyphs numloca /TT_cmap cmaptab cmapdict% /file_table_pos file_table_pos
/Decoding Decoding .dicttomark end end} .forcebind def
% ---------------- PDF TrueType font loading ---------------- %
% Strictly speaking, this code should be loaded only if we have a PDF
% interpreter, but it's so closely tied to the rest of the code in this
% file that we always include it.
% <plat+enc> .findcmap <subtable> true
% <plat+enc> .findcmap false
/.findcmap { //false exch tabdict /cmap get % Some fonts have multiple cmaps with the same platform and
% encoding. Use the first one we find.
0 1 2 index 2 getu16a 1 sub { % Stack: false plat+enc cmap index
8 mul 4 add 1 index exch 8 getinterval_from_stringarray dup 0 4 getinterval 3 index eq { 4 getu32 1 index exch 1 index string_array_size 1 index sub getinterval_from_stringarray 4 -1 roll not 4 2 roll exit } if pop } for % Stack: false plat+enc cmap || subtable true plat+enc cmap
pop pop} .forcebind def
% Build .symbol_list for .pdfcharkeys .
% It is a dictionary containing all SymbolEncoding glyph names
% and random names for filling gaps in the character code range.
/.symbol_list 256 dict def{ =string 0 (x) 0 get put /SymbolEncoding .findencoding 0 1 255 { dup 2 index exch get dup /.notdef eq { pop dup =string 1 3 getinterval cvs length 1 add =string exch 0 exch getinterval cvn } if exch //.symbol_list 3 1 roll put } for pop} .forcebind exec
% Create .GS_extended_SymbolEncoding as inverse of .symbol_list .
{ /.GS_extended_SymbolEncoding 256 array //.symbol_list { exch 2 index 3 1 roll put } forall .defineencoding} .forcebind exec
/.hexdigits (0123456789ABCDEF) def
/.is_hex_digit { % <int> .is_hex_digit <bool>
dup 48 ge exch dup 57 le exch dup 65 ge exch 70 le and 3 1 roll and or} .forcebind def
/.popfex { pop //false exit } .internalbind def/.pop3ex { pop pop pop exit } .internalbind def
/.addglyph { % <dict> <name> <glyph#> .addglyph -
1 index .namestring % d n g s
dup length 7 eq { % Bug688467.ps doesn't work if the uniXXXX mapping is allowed with any cmap.
% Allow it with cmap 3.1 only.
currentdict /.allow_uniXXXX_glyph_names .knownget not { //false } if } { //false } ifelse % d n g s b
{ % An undocumented Adobe feature (not sure) :
% if the name is uniXXXX, obtain Unicode code from it.
% See bug 688946.
TTFDEBUG { (Try uniXXXX:) print dup print } if { dup 0 get 117 ne //.popfex if % u
dup 1 get 110 ne //.popfex if % n
dup 2 get 105 ne //.popfex if % i
dup 3 get //.is_hex_digit exec not //.popfex if dup 4 get //.is_hex_digit exec not //.popfex if dup 5 get //.is_hex_digit exec not //.popfex if dup 6 get //.is_hex_digit exec not //.popfex if dup 3 1 getinterval .hexdigits exch search pop length exch pop exch pop 12 bitshift exch dup 4 1 getinterval .hexdigits exch search pop length exch pop exch pop 8 bitshift exch dup 5 1 getinterval .hexdigits exch search pop length exch pop exch pop 4 bitshift exch dup 6 1 getinterval .hexdigits exch search pop length exch pop exch pop exch pop add add add
cmapencoding exch .knownget not { 0 } if dup 0 eq //.popfex if
TTFDEBUG { ( index=) print dup =string cvs print } if exch pop put //true exit } loop TTFDEBUG { ()= } if } { pop //false } ifelse not { % d n g
{ cmapencoding exch .knownget not { 0 } if dup 0 eq //.pop3ex if 3 copy pop known //.pop3ex if put exit } loop } if} .forcebind def
% <chartoglyphmap> <subcmap> <AGL> .pdfmapchars /CharStrings <charstrings>
/.pdfmapchars { exch cmapdict /cmapencoding exch def % c2g
/CharStrings 0 dict % c2g /CS <<>>
% Add glyphs of <AGL>*<subcmap> :
3 2 roll { % /CS <<>> v
dup type /arraytype eq { % /CS <<>> /name []
{ 3 copy //.addglyph exec pop } forall } { 3 copy //.addglyph exec pop } ifelse pop } forall % Add glyphs of 'post' with lower priority :
0 1 glyphencoding length 1 sub { dup glyphencoding exch get exch dup 0 ne { 3 copy pop known not { 3 copy put } if } if pop pop } for
% Finally, add glyphs from the prebuilt_encoding with lowest priority
% this is a catch-all for poorly matched font/PDF combos
3 2 roll { % /CS <<>> v
dup type /arraytype eq { % /CS <<>> /name []
{ 3 copy //.addglyph exec pop } forall } { 3 copy //.addglyph exec pop } ifelse pop } forall
dup /.notdef 0 put} .forcebind def
% <subtable> .pdfmapsymbolic /Encoding [] /CharStrings <<>>
/.pdfmapsymbolic { //true /.render_notdef gput cmapdict dup length 1 add dict begin [ 64 { /.notdef /.notdef /.notdef /.notdef } repeat ] exch { % [] char glyph
exch dup 255 gt { 255 and 2 index 1 index get /.notdef ne { pop pop //false } { //true } ifelse } { //true } ifelse { dup (01234567) cvs cvn % glyph char /char
3 1 roll % /char glyph char
3 index exch % /char glyph [] char
3 index put % /char glyph
def % -
} if } forall /.notdef 0 def /Encoding exch /CharStrings currentdict end} .forcebind def
% If we're using a 1,0 cmap table, we need to store the table for the heuristic
% to know whether to image or elide GID 0. See zfapi.c ps_get_glyphname_or_cid().
% For other cmap types, we don't. Since this just pushes key/value pairs onto the
% stack for a later dicttomark op, it doesn't matter that different branches can push
% different numbers of objects.
%
% - .pdfcharkeys [/TT_cmap cmapdict] /CharStrings <charstrings> /Encoding <encoding>
/.pdfcharkeys { % The following algorithms are per the PDF 1.7 Reference.
TTFDEBUG { (.pdfcharkeys beg) = } if
% if the flags say symbolic, *and* the font contains a symbol or UCS-2
% cmap table, ignore Encoding if there is one, treat as symbolic.
% If the flags say symbolic, and the font doesn't have a symbol cmap
% and we have an Encoding, treat it as non-symbolic
% if we don't have an Encoding, try the MacRoman cmap table.
% Finally, if none of that works, remove the Encoding, and treat it
% as non-symbolic.
is_symbolic { <00030000> //.findcmap exec { //true } { prebuilt_encoding //null eq { <00030001> //.findcmap exec {//true} {<00010000> //.findcmap exec} ifelse } {//false} ifelse } ifelse
{ //.pdfmapsymbolic exec /prebuilt_encoding //null def //false } { /prebuilt_encoding //null def //true } ifelse } { //true } ifelse { <00030001> //.findcmap exec { prebuilt_encoding //null ne { TTFDEBUG { (Using cmap 3.1 with prebuilt_encoding for non-symbolic.) = } if //true /.render_notdef gput % The character code in /prebuilt_encoding[] is not guaranteed to be
% compatible with the Microsoft UCS2 TrueType cmap subtable.
% If the glyphname is known by AdobeGlyphList, the charcode for the glyph
% is replaced by UCS2 charcode from AdobeGlyphList. Otherwise it is left
% as in /prebuilt_encoding[]. /.pdfmapchars should dredge them.
/.allow_uniXXXX_glyph_names //true def AdobeGlyphList prebuilt_encoding .invert_encoding dup { % <<AGL>> <<pbe>> <glyphname> <pbecode>
pop % <<AGL>> <<pbe>> <glyphname>
TTFDEBUG { (check glypname /) print dup =only flush } if 2 index 1 index .knownget { % <<AGL>> <<pbe>> <glyphname> <AGLcode>
2 index 3 1 roll % <<AGL>> <<pbe>> <<pbe>> <glyphname> <AGLcode>
TTFDEBUG { ( redefine codepoint by AdobeGlyphList, ) print dup //== exec flush } if put % <<AGL>> <<pbe>>
} { % <<AGL>> <<pbe>> <glyphname>
TTFDEBUG { ( unknown glyphname, leave as it is ) = flush } if pop % <<AGL>> <<pbe>>
} ifelse } forall exch pop % <<pbe>>
TTFDEBUG { dup (<<\n) print { exch ( ) print =only (\t) print //== exec } forall (>>\n) print flush } if exch AdobeGlyphList //.pdfmapchars exec /Encoding prebuilt_encoding } { % Likely this branch is now obsolete.
TTFDEBUG { (Using cmap 3.1 for non-symbolic.) = } if 0 dict exch AdobeGlyphList //.pdfmapchars exec /Encoding /WinAnsiEncoding .findencoding % WinAnsiEncoding is just a stub here.
% It will be replaced with one from font resource,
% because PDF spec requires it.
} ifelse } { <00010000> //.findcmap exec { /TT_cmap 1 index cmapdict 3 -1 roll TTFDEBUG { (Using cmap 1.0 for non-symbolic.) = } if prebuilt_encoding //null ne { prebuilt_encoding .invert_encoding exch .romanmacdict //.pdfmapchars exec prebuilt_encoding } { 0 dict exch .romanmacdict //.pdfmapchars exec /MacRomanEncodingForTrueType .findencoding } ifelse /Encoding exch } { % Apply the default algorithm for using the 'post'.
.charkeys % But use PDF encoding when available.
prebuilt_encoding //null ne { pop prebuilt_encoding } if } ifelse } ifelse } if TTFDEBUG { (.pdfcharkeys end) = } if} .forcebind def
% <file> <is_symbolic> <Encoding|null> <FontName> .loadpdfttfont <type42font>
/.loadpdfttfont { TTFDEBUG { (.loadpdfttfont FontName=) print dup == } if /font_name gput TTFDEBUG { (.loadpdfttfont Encoding=) print dup //== exec } if /prebuilt_encoding gput % for .pdfcharkeys
/is_symbolic gput % init key for whether to display the TTF notdef
//false /.render_notdef gput //false 0 .loadttfonttables .makesfnts tabdict /cmap known not { ( **** Warning: Embedded TT font lacks required cmap table. Using identity cmap.\n) pdfformaterror % Unknown (i.e. not 0 ) language ID brings in post table.
% Fields: cmap_version, number_of_subtables,
% plarform_id, encoding_id, offset,
% format, subtable_length, language,
% 256 bytes of identity mapping.
tabdict /cmap < 0000 0001 0001 D00D 0000000c 0000 0106 0000 00 01 02 03 04 05 06 07 08 09 0a 0d 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1d 1c 1d 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2d 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3d 3c 3d 3e 3f 40 41 42 43 44 45 46 47 48 49 4a 4d 4c 4d 4e 4f 50 51 52 53 54 55 56 57 58 59 5a 5d 5c 5d 5e 5f 60 61 62 63 64 65 66 67 68 69 6a 6d 6c 6d 6e 6f 70 71 72 73 74 75 76 77 78 79 7a 7d 7c 7d 7e 7f 80 81 82 83 84 85 86 87 88 89 8a 8d 8c 8d 8e 8f 90 91 92 93 94 95 96 97 98 99 9a 9d 9c 9d 9e 9f a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 aa ad ac ad ae af b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bd bc bd be bf c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cd cc cd ce cf d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 da dd dc dd de df e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea ed ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 fa fd fc fd fe ff > readonly put } if .getpost .pickcmap mark //.pdfcharkeys exec //.ttkeys exec /FontType 42 /PaintType 0 /.render_notdef .render_notdef TTFDEBUG { (numloca=) print numloca = } if .dicttomark dup /FontName font_name put % replace any definition of /FontName
end end .completefont} .forcebind odef
%--------- Define main type42font loading routines, after their dependencies ------------
% <file> .loadttfont <type42font>
/.loadttfont { TTFDEBUG { (.loadttfont) = } if //false % if this came from Fontmap, there may be a dictionary on the dict stack
% with a SubfontID in it. Validate it *is* a Fontmap record by also
% checking for a Path key
/SubfontID where { dup /Path known {/SubfontID get} {pop 0} ifelse } {0} ifelse .loadttfonttables .makesfnts .getpost .pickcmap mark % if we're loading to substitute for TTF in a PDF,
% load the font the "PDF way"
/prebuilt_encoding where {pop //.pdfcharkeys exec} {.charkeys} ifelse //.ttkeys exec /FontType 42 /PaintType 0 TTFDEBUG { (numloca=) print numloca = } if .dicttomark end end dup /FontName get exch definefont} .forcebind def
% <file> .loadwofffont <type42font>
/.loadwofffont{ TTFDEBUG { (.loadwofffont) = } if //false 0 //.loadwofftables exec .makesfnts .getpost .pickcmap mark .charkeys //.ttkeys exec /FontType 42 /PaintType 0 TTFDEBUG { (numloca=) print numloca = } if .dicttomark end end dup /FontName get exch definefont} .forcebind def
% ----- Utilities for loading possible TrueType font ------
% <file> .findttfontname <fname> true
% <file> .findttfontname false
% Closes the file in either case.
/.findttfontname { //true 0 .loadttfonttables tabdict /name .knownget { dup 8 getu32 f exch setfileposition 12 getu32 dup 65535 gt { pop 65535 } if % protect against extremely large name
string f exch readstring pop dup 6 findname not { 4 findname % Try FullName
} { exch pop //true } ifelse } { //false } ifelse f closefile end end} .forcebind def
/.findwoffname { //true 0 //.loadwofftables exec tabdict /name .knownget { dup /clen exch 8 getu32 def dup /olen exch 12 getu32 def 4 getu32 f exch setfileposition olen dup 65535 gt { pop 65535 } if % protect against extremely large name
/fs clen olen ne {f clen () /SubFileDecode filter /FlateDecode filter} {f clen () /SubFileDecode filter} ifelse def string fs exch readstring pop fs closefile dup 6 findname not { 4 findname % Try FullName
} { exch pop //true } ifelse } { //false } ifelse f closefile end end} .forcebind def
/tt_tag_dict << <00010000> 0 (true) 0 (typ1) 0 (ttcf) 0 >> readonly def/ttf_otf_tag_dict << <00010000> 0 (true) 0 (typ1) 0 (ttcf) 0 (OTTO) 0>> readonly def% The wOFF tag is immediately followed by the sfnt "flavour" so for simplicity
% combine them
/woff_tag_dict << (wOFF) 0 <774F464600010000> 0 % (wOFF)<00010000> .concatstrings
(wOFFtrue) 0 (wOFFtyp1) 0>> readonly def
% <file> .is_ttf_or_otf <bool>
/.is_ttf_or_otf { dup 0 setfileposition (1234) .peekstring { //ttf_otf_tag_dict exch known } { //false } ifelse} .forcebind def
/.is_woff { dup 0 setfileposition (1234) .peekstring { //woff_tag_dict exch known } { //false } ifelse} .forcebind def
% <file> <key> .findfontvalue <value> true
% <file> <key> .findfontvalue false
% Closes the file in either case.
/.findnonttfontvalue /.findfontvalue load def/.findfontvalue { 1 index //.is_woff exec { dup /FontType eq { pop closefile 42 //true } { dup /FontName eq { pop //.findwoffname exec} { pop closefile //false } ifelse } ifelse } { 1 index //.is_ttf_or_otf exec { % If this is a font at all, it's a TrueType font.
dup /FontType eq { pop closefile 42 //true } { dup /FontName eq { pop //.findttfontname exec} { pop closefile //false } ifelse } ifelse } { % Not a TrueType font.
.findnonttfontvalue } ifelse } ifelse} .forcebind def
% Load a font file that might be a TrueType font.
% <file> .loadfontfile -
/.loadnonttfontfile /.loadfontfile load def/.loadfontfile { dup (12345678) .peekstring { //woff_tag_dict exch known } { //false } ifelse { //.loadwofffont exec pop } { dup (1234) .peekstring { //tt_tag_dict exch known } { //false } ifelse { % If this is a font at all, it's a TrueType font.
//.loadttfont exec pop } { % Not a TrueType font.
.loadnonttfontfile } ifelse } ifelse} .forcebind def
% Undef the local utility funcs
[ /.findttfontname /.findwoffname /ttf_otf_tag_dict /tt_tag_dict /woff_tag_dict /.is_ttf_or_otf /.is_woff] currentdict .undefinternalnames% ----- END .loadfontfile that supports possible TrueType font ------
% Undef these, not needed outside this file
[ /.addglyph /.definettcidfont /.fill_identity_cmap /.findseg /.loadttfontdict /.is_hex_digit /.pop3ex /.popfex /.ttkeys /.printtab /.readttdata /.nname /.loadttfont /.loadwofffont /.loadwofftables /.findcmap /.pdfmapsymbolic /.pdfcharkeys /.pdfmapchars] systemdict .undefinternalnames
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