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Aminet 21
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Aminet 21 (1997)(GTI - Schatztruhe)[!][Oct 1997].iso
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gs503_data.lha
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gs_cidfn.ps
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1997-08-14
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% Copyright (C) 1995, 1996, 1997 Aladdin Enterprises. All rights reserved.
%
% This file is part of Aladdin Ghostscript.
%
% Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
% or distributor accepts any responsibility for the consequences of using it,
% or for whether it serves any particular purpose or works at all, unless he
% or she says so in writing. Refer to the Aladdin Ghostscript Free Public
% License (the "License") for full details.
%
% Every copy of Aladdin Ghostscript must include a copy of the License,
% normally in a plain ASCII text file named PUBLIC. The License grants you
% the right to copy, modify and redistribute Aladdin Ghostscript, but only
% under certain conditions described in the License. Among other things, the
% License requires that the copyright notice and this notice be preserved on
% all copies.
% 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.
/.definecidfont [
% CIDFontType 0
{ dup /FontMatrix known not
{ dup /FontMatrix [0.001 0 0 0.001 0 0] put
dup /FDArray get
{ /FontMatrix get [1000 0 0 1000 0 0] 1 index concatmatrix pop }
forall
}
if
dup /FDArray get mark exch
{ % Add pro forma entries
dup /FontType 1 put
dup /CharStrings 10 dict put
dup /Encoding [] put
% Create a dummy Subrs array now.
dup /Private get dup /SubrCount .knownget
{ array 1 index /Subrs 3 -1 roll put }
if pop
dup /FontName .knownget not { () } if exch .buildfont1 exch pop
}
forall ] 1 index /FDepVector 3 -1 roll put
1 index exch .buildfont9 exch pop
} bind
% CIDFontType 1
{ 1 index exch .buildfont10 exch pop
} bind
% CIDFontType 2
{ 1 index exch .buildfont11 exch pop
} bind
] def
% ---------------- Reading CIDFontType 0 files ---------------- %
30 dict begin
% We add the following entries to the CIDFont dictionary, in addition to
% the ones documented by Adobe:
% ReadString - procedure for reading a string from the binary data
% SubrCache - dictionary for caching Subr arrays
% For CIDFonts where we read the data from disk incrementally:
% DataOffset - starting position of data in file
% (if data are in hex) OffsetMap - map from logical data positions to
% physical positions in file
/StartData % <(Binary)|(Hex)> <datalength> StartData -
% (currentdict is CID font dict)
{ % If we're loading a resource file, we can just save a
% pointer to the binary data and load it incrementally.
% Check for this by opening the resource file,
% positioning it to currentfile's position plus the
% data length, and checking for %%EndData.
mark
{ currentfile fileposition
CIDFontName 100 string ResourceFileName (r) file
mark
{ % Stack: (Binary)|(Hex) length -mark- pos resfile
% -mark-
5 index (Hex) eq
{ 1 index 3 index setfileposition
1 index 5 index .skiphex
%**************** SKIP > AND WHITESPACE SOMEHOW
}
{ 1 index 3 index 6 index add setfileposition
}
ifelse
1 index 9 string readstring pop (%%EndData) ne { stop } if
}
.internalstopped { cleartomark closefile stop } if
pop % pop the mark
}
.internalstopped
{ % File is not positionable, load the data now.
cleartomark exch (Hex) eq
{ { currentfile exch readhexstring pop } }
{ { currentfile exch readstring pop } }
ifelse /ReadString exch def
dup 65535 le
{ string ReadString
}
{ mark exch
{ dup 0 eq { pop exit } if
dup 65535 min dup string ReadString
3 1 roll sub
}
loop ]
}
ifelse
/GlyphData exch def
/.vmreadstring cvx
}
{ % File is positionable, just save a pointer.
% Stack: (Binary)|(Hex) length -mark- pos file
4 1 roll
/DataOffset exch def
pop /GlyphData exch def
exch (Hex) eq
{ % Hex data, build the offset map.
.buildoffsetmap
/.hexreadstring
}
{ % Binary data, just skip over it.
currentfile DataOffset GlyphData add setfileposition
/.binaryreadstring
}
ifelse cvx
2 packedarray cvx
}
ifelse /ReadString exch def
/SubrCache 10 dict def
CIDFontName currentdict /CIDFont defineresource pop
end % CID font dict
end % resource category dict
} bind def
% Skip a given distance in an ASCIIHex encoded file. We use this at
% rendering time as well.
/.skiphex % <file> <count> .skiphex -
{ exch /ASCIIHexDecode filter dup 3 -1 roll () /SubFileDecode filter
dup flushfile closefile closefile
} bind def
% Build the map from logical offsets to physical offsets in ASCIIHex
% encoded data.
/.buildoffsetmap
{ /OffsetMap GlyphData 256 idiv 8000 min array def
2 dict begin
/block GlyphData OffsetMap length idiv def
0 1 OffsetMap length 1 sub
{ OffsetMap exch currentfile fileposition put
currentfile block .skiphex
}
for
GlyphData block mod dup 0 eq
{ pop }
{ currentfile exch .skiphex }
ifelse
end % scratch dict
} bind def
currentdict end
% ---------------- Rendering ---------------- %
% ------ Generic ------ %
% Read a string at a given offset in a "file" (binary file, ASCII hex file,
% or GlyphData in RAM).
/.binaryreadstring % <pos> <string> <file> .binaryreadstring <string>
{ dup 4 -1 roll DataOffset add setfileposition exch readstring pop
} bind def
/.hexreadstring % <pos> <string> <file> .hexreadstring <string>
{ % Use the OffsetMap to get to the block of hex data,
% then skip to the correct position by reading.
GlyphData OffsetMap length idiv
% Stack: pos string file blocklen
3 index 1 index idiv OffsetMap exch get
2 index exch setfileposition
% Skip the next (pos % blocklen) hex bytes.
4 -1 roll exch mod 1 index exch .skiphex
% Stack: string file
exch readhexstring pop
} bind def
/.vmreadstring % <pos> <string> .vmreadstring <vmstring>
{ GlyphData .stringsreadstring
} 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
% Read the glyph data for a given CID.
% The CIDFont is currentdict.
/.readglyphdata % <cid> .readglyphdata <subfont> <string|null>
{ currentdict /GlyphDirectory .knownget
{ dup type /arraytype eq
{ 1 index exch get }
{ 1 index exch .knownget not { null } if }
ifelse
dup null eq
{ FDepVector 0 get exch }
{ FDBytes 0 eq
{ FDepVector 0 get exch }
{ % Note: FDBytes > 1 is not supported.
dup 0 get FDepVector exch get
exch dup length 1 sub 1 exch getinterval
}
ifelse
}
ifelse
}
{ FDBytes GDBytes add mul CIDMapOffset add
dup FDBytes .readint exch
FDBytes add dup GDBytes .readint
exch GDBytes add FDBytes add GDBytes .readint
% Stack: fd pos nextpos
1 index sub dup 0 eq
{ pop pop pop FDepVector 0 get null }
{ string ReadString exch FDepVector exch get exch }
ifelse
}
ifelse
} bind def
% ------ CIDFontType 0 ------ %
% 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
{ currentdict /SubrMapOffset .knownget
{ Subrs 0 get null ne
{ pop % We've already loaded the Subrs.
}
{ SubrCache 1 index .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 3 -1 roll 2 index put
}
if
}
{ % We haven't loaded any Subrs at this offset yet.
SubrCount array 0 .readsubrs
SubrCache 3 -1 roll 2 index put
}
ifelse
Subrs copy pop
}
ifelse
}
if
} bind def
% BuildGlyph procedure for CIDFontType 0.
% ****** WHY NOT USE .type1execchar FOR THIS? ******
% 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
{ %**** HANDLE NOTDEF ****
}
if
% Stack: cidfont cid subfont charstring
dup null eq { pop pop pop pop } { %**** WRONG ****
4 -1 roll pop
exch dup /Private get begin .loadsubrs end
3 -1 roll //.cid0buildstring cvs cvn 3 1 roll
dup /CharStrings get 3 index 4 -1 roll put
setfont
1000 0 setcharwidth %**** WRONG ****
0 0 moveto glyphshow
} ifelse %**** WRONG ****
end
.setglobal
} bind def
% ------ CIDFontType 2 ------ %
% BuildGlyph procedure for CIDFontType 2.
% ****** ADD THE OUTLINE STRING AS AN ARGUMENT TO .type42execchar. ******
% The name %Type11BuildGlyph is known to the interpreter.
(%Type11BuildGlyph) cvn % <cidfont> <cid> %Type11BuildGlyph -
{ .currentglobal 3 1 roll 1 index gcheck .setglobal
1 index begin
dup GDBytes mul GDBytes string CIDMap .stringsreadstring .cvbsi
% Stack: cidfont cid glyphindex
%**************** GlyphDirectory is not supported yet.
(
currentdict /GlyphDirectory .knownget
) pop false
{ dup type /arraytype eq
{ 1 index exch get }
{ 1 index exch .knownget not { null } if }
ifelse
dup null eq
{ %**** HANDLE NOTDEF
}
if
1 index exch .type42execchar
}
{ 1 index exch .type42execchar
}
ifelse
end
.setglobal
} bind def
% ---------------- Define resources ---------------- %
languagelevel exch 2 .setlanguagelevel
% Define the CIDInit ProcSet resource.
% The ProcSet dictionary is still on the stack.
/CMap /Generic /Category findresource dup length dict .copydict
/Category defineresource pop
% We might have loaded CMap support already.
/CIDInit /ProcSet 2 copy resourcestatus {
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.
/CIDFont /Generic /Category findresource dup length dict .copydict
dup /InstanceType /dicttype put
dup /DefineResource {
dup /CIDFontType get dup 9 add /FontType exch 3 index 3 1 roll put
//.definecidfont exch get exec
/Generic /Category findresource /DefineResource get exec
} put
/Category defineresource pop
currentdict /.definecidfont undef
% 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 either a string or an array of strings.
dup type dup /stringtype eq
{ pop true
}
{ dup /arraytype eq exch /packedarraytype eq or
{ true exch { type /stringtype ne { pop false exit } if } forall
}
{ false
}
ifelse
}
ifelse
} bind put
/Category defineresource pop
.setlanguagelevel