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% Copyright (C) 2001-2021 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.,  1305 Grant Avenue - Suite 200, Novato,
% CA 94945, U.S.A., +1(415)492-9861, for further information.
%

% Redefine CIDFont category with an emulation with True Type fonts.

languagelevel 2 .setlanguagelevel

15 dict begin    % a temporary dictionary for local binding.

%------------------Copy the FontEmulationProcs here : -------------------

/FontEmulationProcs /ProcSet findresource {
  def
} forall

currentdict /super.complete_instance currentdict /complete_instance get put

%-------Auxiliary procedures for building CIDFontType 2 from TT file -----------

/GenerateCIDMap % GenerateCIDMap 
{ begin
 % Obtain the maximal CID :
 % This implementation doesn't check whether glyphs really present.
 Decoding /CIDCount get /CIDCount exch def
 % Prepare the CIDMap structure :
 /CIDMap [
 CIDCount 22000 le {
 CIDCount 2 mul string
 } {
 44000 string
 CIDCount 44000 gt {
 % need three strings
 44000 string		% 22000 2 mul string
 CIDCount 44000 sub 2 mul string
 } {
 CIDCount 22000 sub 2 mul string
 } ifelse
 } ifelse
 ] def
 % Now fill it :
 Decoding TT_cmap SubstNWP GDBytes CIDMap .fillCIDMap
 currentdict end
} bind def

/GenerateIdentityCIDMap % GenerateCIDMap 
{ begin
 /CIDMap [ 44000 string 44000 string 44000 string] def
 CIDMap .fillIdentityCIDMap
 currentdict end
} bind def

/load_sfnts % <FontDict> load_sfnts <FontDict>
{ % Read the True Type file from the path /Path, and buld /sfnts,
 % skipping glyf and loca.
 dup /Path get % (path)
 QUIET not {
 (Loading a TT font from ) print dup print
 ( to emulate a CID font ) print 1 index /CIDFontName get =only ( ... ) print
 } if
 (r) file dup % file file
 3 1 roll % file file
 1 index /SubfontID .knownget not { 0 } if % file file SubfontID
 2 index /FileType .knownget
 {/WOFF eq}
 {//false} ifelse
 % It's not (currently) viable to load WOFF fonts "stripped", so we don't try
 {.load_woff_for_cid exch copy exch pop}
 {
 .load_tt_font_stripped exch
 copy % file 
 QUIET not {
 (Done.) =
 } if
 dup 3 1 roll % file 
 exch /File exch put % 
 } ifelse
 dup dup /CIDSystemInfo get /Ordering get (.) % () ()
 2 index /Decoding get =string cvs % () () ()
 concatstrings concatstrings cvn /Decoding exch put % 
 dup dup /CIDSystemInfo get /Ordering get (-WMode) % () ()
 concatstrings cvn /SubstCID
 2 copy resourcestatus {
 pop pop
 findresource /subst_CID_on_WMode exch put % 
 } {
 pop pop pop
 } ifelse
 dup /Decoding get /Identity.Unicode eq {
 //ChooseDecoding exec % 
 //GenerateIdentityCIDMap exec % 
 } {
 //ChooseDecoding exec % 
 //GenerateCIDMap exec % 
 } ifelse
} bind def

%-----------TrueType-specific methods for category redefinition : -----------

/RefinePath % <FontDict> RefinePath <FontDict>
{ dup begin
 Path .libfile {
 dup .filename {
 currentdict exch /Path exch put
 } if
 closefile
 } {
 (r) { file } //.internalstopped exec
 {
 (Can't find the font file ) print =
 /findfont cvx /undefinedfilename signalerror
 }
 {
 dup .filename {
 currentdict exch /Path exch put
 } if
 closefile
 } ifelse
 } ifelse
 end
} bind def

/complete_instance % <font_name> <FontDict> <Options> complete_FAPI_Font <font_name> <FontDict>
{ 1 index /CIDFontType 2 put % Other types are not emulated yet.
 //super.complete_instance exec
 //RefinePath exec
 //load_sfnts exec
} bind def

/ValidFileTypes
<<
 /TrueType 0
 /WOFF 0
>> def

/IsMyRecord % <raw_record> -> <raw_record> bool
{
 dup type /dicttype eq { dup /FileType .knownget { //ValidFileTypes exch known } { //false } ifelse } { //false } ifelse
} bind def

currentdict /ValidFileTypes undef

/IsActive % <record> IsActive <bool>
{ pop //true
} bind def

/CIDFontRecordVirtualMethods //RecordVirtualMethodsStub dup length 3 add dict copy begin
 /GetCSI //TranslateCSI def
 /IsActive //IsActive def
 /MakeInstance % <Name> <record> MakeInstance <Name> <Instance> <size>
 { currentglobal 3 1 roll //true setglobal
 //CIDFontOptions //complete_instance exec
 2 copy //GetSize exec
 4 3 roll setglobal
 } bind def
currentdict end def

% Redefine the /CIDFont category :
4 dict begin
 /CategoryName /CIDFont def
 /IsMapFileOptional //true def
 /VerifyMap { pop } bind def
 /PreprocessRecord % <map> <Name> <raw_record> PreprocessRecord <map> <Name> <record> <bool>
 { //IsMyRecord exec dup {
 pop dup /RecordVirtualMethods //CIDFontRecordVirtualMethods put
 //true
 } if
 } bind def
currentdict end

/MappedCategoryRedefiner /ProcSet findresource /Redefine get exec

end  % the temporary dictionary for local binding.

.setlanguagelevel

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