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% Copyright (C) 2001-2018 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.
%
% Initialization file for Type 32 fonts.
% ------ Type 32 fonts ------ %
% We need LanguageLevel 2 or higher in order to have defineresource.
languagelevel dup 2 .max .setlanguagelevel
/BitmapFontInit mark
/.makeglyph32 systemdict /.makeglyph32 get
systemdict /.makeglyph32 .undef
/addglyph { % ([wx wy llx lly urx ury] |
% [w0x w0y llx lly urx ury w1x w1y vx vy])
% <bitmap> <cid> <type32font> addglyph -
1 index dup 2 index .removeglyphs
22 string .makeglyph32
% Stack: metrics bitmap cid font metstr
3 index () ne {
% Use G4 encoding to compress the bitmap.
% Define a string large enough to hold the metrics,
% an uncompressed bitmap (worst case = 5x expansion),
% and the 2 RTC codes (3 bytes).
dup length 4 index length 5 mul add 10 add
65535 .min string
% Stack: metrics bitmap cid font metstr buffer
dup 0 3 index putinterval
dup 2 index length 1 index length 1 index sub getinterval
% Stack: metrics bitmap cid font metstr buffer bitbuf
mark /Columns 8 index dup 4 get exch 2 get sub
/Rows 10 index dup 5 get exch 3 get sub
/K -1 /EndOfBlock //true /BlackIs1 //true
.dicttomark /CCITTFaxEncode filter
% Stack: metrics bitmap cid font metstr buffer filter
dup 6 index writestring closefile
% Find the end of the data by scanning backwards for the RTC.
% There are 2 RTCs x 12 bits = 3 bytes to remove.
{
dup dup length 1 sub get 0 ne { exit } if
0 1 index length 1 sub getinterval
} loop
0 1 index length 3 sub getinterval
exch pop % metstr
} if
1 index /CharStrings get 3 index 3 -1 roll put
pop pop pop pop
} obind
/removeall { % <type32font> removeall -
0 65535 2 index removeglyphs pop
} obind
/.removeglyphs systemdict /.removeglyphs get
systemdict /.removeglyphs .undef
/removeglyphs { % <cid_min> <cid_max> <type32font> .removeglyphs -
3 copy .removeglyphs
dup /CharStrings get dup {
% Stack: cidmin cidmax font CharStrings cid bitmap
pop dup 5 index ge { dup 4 index le { 2 copy undef } if } if pop
} forall pop pop pop pop
} obind
.dicttomark /ProcSet defineresource pop
/.cidfonttypes where { pop } { /.cidfonttypes 6 dict def } ifelse
/CIDFontType4
{
dup /FontType 32 .forceput
dup /CharStrings 20 dict .forceput
1 index exch .buildfont32 exch pop
} .bind executeonly odef
.cidfonttypes begin
4 /CIDFontType4 load def % CIDFontType 4 = FontType 32
end % .cidfonttypes
currentdict /CIDFontType4 .forceundef
% Define the BuildGlyph procedure.
% Since Type 32 fonts are indexed by CID, there is no BuildChar procedure.
% The name %Type32BuildGlyph is known to the interpreter.
(%Type32BuildGlyph) cvn { % <font> <cid> %Type32BuildGlyph -
1 index /CharStrings get
% Stack: font cid CharStrings
dup 2 index .knownget {
exch pop
} {
0 .knownget not {
exch pop % Stack: cid
.getshowoperator /invalidfont signalerror
} if
} ifelse
% Stack: font cid cstr
dup //.getmetrics32 % use // because of .undef below
dup 14 gt {
8 index 8 index 13 3 roll setcachedevice2
} {
4 index 4 index 9 3 roll setcachedevice
} ifelse
% Stack: font cid cstr w h nmetrics llx lly
6 -1 roll 4 -1 roll 1 index length 1 index sub getinterval
% Stack: font cid w h llx lly bitstr
dup () eq {
pop pop pop
} {
mark /Columns 6 index /Rows 7 index /K -1 /EndOfBlock //false /BlackIs1 //true
.dicttomark /CCITTFaxDecode filter 4 index 4 index //true
% Stack: font cid w h llx lly filter w h //true
[ 1 0 0 1 11 -2 roll exch neg exch neg ] 5 -1 roll imagemask
} ifelse
pop pop pop pop
} .bind def
systemdict /.getmetrics32 .undef
buildfontdict 32 /.buildfont32 cvx put
32 dup /FontType defineresource pop
.setlanguagelevel