% Copyright (C) 1995, 2000 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: gs_cidfn.ps,v 1.27 2003/05/23 09:57:34 igor Exp $
% ProcSet for implementing CIDFont and CIDMap resources.
% When this is run, systemdict is still writable.
% ---------------- Defining CIDFont resources ---------------- %
% Define a CIDFont resource. This is the defineresource implementation for
% the CIDFont resource category.
/.checkfonttype { % <cidfont> <fonttype> .checkfonttype <cidfont> <new?>
1 index /FID known {
1 index /FontType get ne {
/definefont cvx /invalidfont signalerror
} if false
} {
1 index /FontType 3 -1 roll put true
} ifelse
} bind def
/.cidfonttypes where { pop } { /.cidfonttypes 6 dict def } ifelse
.cidfonttypes
30 dict begin
% The key in .cidfonttypes is the CIDFontType value;
% the value is a procedure that takes a font name and the CIDFont dictionary
% and replaces the latter with a real font.
% ------ CIDFontType 0 (FontType 9) ------ %
% We add the following entries to the CIDFont dictionary, in addition to
% the ones documented by Adobe:
% SubrCache - dictionary for caching Subr arrays
% For CIDFonts where we read the data from disk incrementally:
% GlyphData is 0 (arbitrary)
% DataSource - a ReusableStreamDecode filter for the data
% We also add a FID entry, and possibly a Subrs entry, to each element of
% FDArray.
dup 0 {
9 .checkfonttype {
/CIDInit /ProcSet findresource begin
.completefont9
end
} if
1 index exch .buildfont9 exch pop
} put % Don't bind it here, because gs_fapi.ps redefines .buildfont9
% Add entries to a new CIDFontType 0 font per documentation (FontMatrix)
% or for .buildfont9 (FDArray.Private.Subrs).
/.completefont9 { % <cidfont0> .completefont9 <cidfont0>
currentglobal 3 1 roll dup gcheck setglobal
dup /FontMatrix known not {
dup /FontMatrix [0.001 0 0 0.001 0 0] put
dup /FDArray get {
currentglobal exch dup gcheck setglobal
dup /FontMatrix get [1000 0 0 1000 0 0] matrix concatmatrix
/FontMatrix exch put
setglobal
} forall
} if
dup /FDArray get {
% Read the Subrs if necessary.
dup /Private get dup /Subrs known not {
dup /SubrCount .knownget {
% Stack: font Private SubrCount
currentglobal 3 1 roll 1 index gcheck setglobal
array 1 index /Subrs 3 -1 roll put
% Stack: font global Private
2 index begin begin .loadsubrs end end
setglobal
} {
pop
} ifelse readonly pop
} {
pop pop
} ifelse
} forall
3 -1 roll setglobal
} bind def
% Read some Subrs for the current Type 1 subfont.
% The subfont's Private dict is currentdict; the CIDFont itself is the
% next dictionary on the stack.
/.readsubrs { % <Subrs> <start> .readsubrs <Subrs>
1 SubrCount 1 sub {
dup SDBytes mul SubrMapOffset add
dup SDBytes .readint exch SDBytes add SDBytes .readint
1 index sub string ReadString 2 index 3 1 roll put
} for
} bind def
% Ensure that all the Subrs for the current Type 1 subfont are loaded.
% The subfont's Private dict is currentdict; the CIDFont itself is the
% next dictionary on the stack.
/.loadsubrs {
Subrs length 0 ne {
SubrCache SubrMapOffset .knownget {
% We've already loaded some Subrs at this offset.
% Make sure we've got as many as we need.
dup length SubrCount lt {
% We need to load more.
SubrCount array exch 1 index copy length .readsubrs
SubrCache SubrMapOffset 2 index put
} if
} {
% We haven't loaded any Subrs at this offset yet.
SubrCount array 0 .readsubrs
SubrCache SubrMapOffset 2 index put
} ifelse
Subrs copy pop
} if
} bind def
% ------ CIDFontType 1 (FontType 10) ------ %
dup 1 {
10 .checkfonttype pop
1 index exch .buildfont10 exch pop
} put % Don't bind it here because gs_fapi.ps redefines .buildfont10
% ------ CIDFontType 2 (FontType 11) ------ %
dup 2 {
11 .checkfonttype pop
1 index exch .buildfont11 exch pop
} put % Don't bind it here because gs_fapi.ps redefines .buildfont11
pop % .cidfonttypes
% ---------------- Reading CIDFontType 0 files ---------------- %
/StartData { % <(Binary)|(Hex)> <datalength> StartData -
% (currentdict is CID font dict)
% If we're loading a resource file and the data format is
% binary, we can just save a pointer to the data and load it
% incrementally.
mark {
% Previous versions of this code made provisions for
% reading hex-encoded data incrementally. Since hex data
% doesn't seem to be used in practice, we no longer bother.
2 index (Binary) ne { stop } if
currentfile .currentresourcefile ne { stop } if
% Hack: the pdfwrite driver relies on finalization to write
% out fonts. However, the font may be finalized after the
% resource file, in which case the resource file will be
% closed. So if the current output device is pdfwrite,
% don't use incremental loading.
currentdevice .devicename /pdfwrite eq { stop } if
currentfile fileposition
} .internalstopped {
% File is not positionable, or uses hex data.
% Load the data now.
cleartomark exch (Hex) eq
{ { currentfile exch readhexstring pop } }
{ { currentfile exch readstring pop } }
ifelse exch
% Stack: readproc length
dup 65400 le {
% readstring with a 0-length string causes a rangecheck,
% but a data length of 0 is allowed.
string dup () ne { 1 index exec } if
} {
mark 3 1 roll {
% Stack: mark str ... readproc length
dup 0 eq { pop exit } if
dup 65400 .min dup string 3 index exec
% Stack: mark str ... readproc length newstrlen newstr
4 1 roll sub
} loop
counttomark 1 add 1 roll ]
} ifelse
/GlyphData exch def
% If we were reading hex data, skip past the >.
2 get { readhexstring } 0 get eq {
currentfile 0 (>) .subfiledecode dup flushfile closefile
} if
} {
% File is positionable and binary, just save a pointer.
% Stack: (Binary) length -mark- pos
/GlyphData 0 def
exch pop 3 -1 roll pop exch
% Stack: pos length
/DataSource currentfile 2 index () .subfiledecode true .reusablestream def
currentfile 3 1 roll add setfileposition
} ifelse
/SubrCache 10 dict def
CIDFontName currentdict /CIDFont defineresource pop
end % CID font dict
end % resource category dict
} bind def
% Some Adobe fonts include the line
% /Setup /cid_Setup load def
% This is apparently included only to prevent proper, conforming PostScript
% interpreters (as opposed to ATM or a special Adobe font loader) from
% loading the font, since Setup is not referenced anywhere else in the file.
/cid_Setup { } def
currentdict end
% ---------------- Rendering ---------------- %
% ------ Generic ------ %
% Read a string at a given offset in a "file" (binary file or
% GlyphData in RAM).
/ReadString { % <pos> <string> ReadString <string>
GlyphData 0 eq {
% Read from the file.
DataSource 3 -1 roll setfileposition
DataSource exch readstring pop
} {
% Read from a string or an array of strings.
GlyphData .stringsreadstring
} ifelse
} bind def
/.stringsreadstring % <pos> <string> <strings> .stringsreadstring
% <vmstring>
{ dup type /stringtype eq
{ 3 1 roll length getinterval
}
{ { % Stack: pos string glyphdata
dup 0 get length dup 4 index gt { exit } if
4 -1 roll exch sub 3 1 roll
dup length 1 sub 1 exch getinterval
}
loop
% Stack: pos string glyphdata glyphdata[0]length
% We know no request can span more than 2 strings.
3 index 3 index length add 1 index le
{ % Request fits in a single string: just return a substring.
pop 0 get 3 1 roll length getinterval
}
{ % Request spans 2 strings. Copy the first part.
1 index 0 get 4 index 3 -1 roll 1 index sub getinterval
2 index copy
% Copy the second part.
% Stack: pos str glyphdata str1
length exch 1 get 0 3 index length
3 index sub getinterval 2 index 3 1 roll putinterval
exch pop
}
ifelse
}
ifelse
} bind def
% Interpret a byte string as a (big-endian) integer.
/.cvbsi % <bytes> .cvbsi <int>
{ 0 exch { exch 8 bitshift add } forall
} bind def
% Read an integer from binary data.
/.readint % <pos> <nbytes> .readint <int>
{ string ReadString .cvbsi
} bind def
% ------ CIDFontType 0 ------ %
/.readglyphdata {
currentfont exch .type9mapcid
FDArray exch get exch
} bind def
% BuildGlyph procedure for CIDFontType 0.
% The name %Type9BuildGlyph is known to the interpreter.
/.cid0buildstring 10 string def
(%Type9BuildGlyph) cvn { % <cidfont> <cid> %Type9BuildGlyph -
.currentglobal 3 1 roll 1 index gcheck .setglobal
1 index begin
dup .readglyphdata dup null eq {
% Substitute CID 0. **** WRONG ****
pop pop 0 .readglyphdata
} if
% Stack: cidfont cid subfont charstring
dup null eq { pop pop pop pop } { %**** WRONG ****
4 -1 roll pop
3 1 roll exch dup 4 -1 roll 0 0 moveto
3 index /FontType get 2 eq { .type2execchar } { .type1execchar } ifelse
} ifelse %**** WRONG ****
end
.setglobal
} bind def
% ------ CIDFontType 2 ------ %
% BuildGlyph procedure for CIDFontType 2.
% The name %Type11BuildGlyph is known to the interpreter.
(%Type11BuildGlyph) cvn { % <cidfont> <cid> %Type11BuildGlyph -
% We must be prepared for out-of-range CIDs.
2 copy { .type11mapcid } .internalstopped {
pop /CharStrings get /.notdef get
} if
% Stack: cidfont cid glyphindex
1 index exch .type42execchar
} bind def
% ---------------- Define resources ---------------- %
languagelevel exch 2 .setlanguagelevel
% Define the CIDInit ProcSet resource.
% The ProcSet dictionary is still on the stack.
% We might have loaded CMap support already. However, Adobe's
% protected font downloader defines a CIDInit ProcSet that will be
% loaded from the filesystem later, so we must check specifically
% for the ProcSet being defined in VM.
/CIDInit /ProcSet 2 copy resourcestatus { pop 0 eq } { false } ifelse {
pop pop findresource dup length 4 index length add dict .copydict
4 -1 roll exch .copydict
} {
3 -1 roll
} ifelse exch defineresource pop
% Define the CIDFont resource category.
% We break out .buildcidfont because it appears that at least for
% Type 32 (CIDFontType 4) fonts, the font can be registered in the Font
% category with only a CIDFontType and no FontType.
/.buildcidfont { % <name> <fontdict> .buildcidfont
% <name> <cidfont>
systemdict /ProvideUnicode .knownget not { false } if {
/FontEmulationProcs /ProcSet findresource
/ProvideUnicodeDecoding get exec
} if
dup /CIDFontType get //.cidfonttypes exch get exec
} odef
/CIDFont /Generic /Category findresource dup length dict .copydict
dup /InstanceType /dicttype put
dup /DefineResource {
.buildcidfont
/Generic /Category findresource /DefineResource get exec
} put
% CIDFonts may be defined in CFF OpenType files.
% Check for this here.
/.loadcidfontresource {
dup .ResourceFile {
{.loadfont} .execasresource
} {
dup /undefinedresource signalerror
} ifelse
} bind def
dup /.LoadResource {
currentglobal {
.loadcidfontresource
} {
true setglobal {.loadcidfontresource} stopped false setglobal {stop} if
} ifelse
} bind put
/Category defineresource pop
% Add the new FontType resources.
9 1 11 { dup /FontType defineresource pop } for
% Add the new FMapType resource.
9 dup /FMapType defineresource pop
% Define the CIDMap resource category.
% These aren't documented, but it's clear what they are for:
% to give names to CIDMaps for CIDFontType 2 fonts.
/CIDMap /Generic /Category findresource dup length dict .copydict
dup /.CheckResource {
% Allow a string, an array of strings, or (as of Adobe release 3011)
% a dictionary.
dup type dup dup /stringtype eq exch /dicttype eq or {
pop true
} {
dup /arraytype eq exch /packedarraytype eq or {
true exch { type /stringtype eq and } forall
} {
false
} ifelse
} ifelse
} bind put
/Category defineresource pop
.setlanguagelevel
%% Replace 1 (gs_ciddc.ps)
(gs_ciddc.ps) runlibfile
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