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- % Copyright (C) 1994, 1995 Aladdin Enterprises. All rights reserved.
- %
- % This software is licensed to a single customer by Artifex Software Inc.
- % under the terms of a specific OEM agreement.
-
- % $RCSfile: gs_pfile.ps,v $ $Revision: 1.8 $
- % Runtime support for minimum-space fonts and packed files.
-
- % ****** NOTE: This file must be kept consistent with
- % ****** packfile.ps and wrfont.ps.
-
- % ---------------- Packed file support ---------------- %
-
- % A packed file is the concatenation of several file groups, each of which
- % is the result of compressing several files concatenated together.
- % The packed file begins with a procedure that creates an appropriate
- % decoding filter for each file group, as follows:
- % <group-subfile-filter> -proc- <group-decode-filter>
- % Thus, accessing an individual file requires 4 parameters:
- % the starting address and length of the outer compressed file,
- % and the starting address and length of the inner file.
- /.packedfilefilter % <file> <ostart> <olength> <istart> <ilength>
- % .packedfilefilter <filter>
- { 4 index systemdict begin token pop end 6 1 roll
- % Stack: fproc file ostart olength istart ilength
- 4 index 5 -1 roll setfileposition
- % Stack: fproc file olength istart ilength
- 4 -2 roll () /SubFileDecode filter
- % Stack: fproc istart ilength ofilter
- 4 -1 roll exec
- % Filters don't support setfileposition, so we must skip data
- % by reading it into a buffer. We rely on the fact that
- % save/restore don't affect file positions.
- % Stack: istart ilength dfilter
- save exch 1000 string
- % Stack: istart ilength save dfilter scratch
- 4 index 1 index length idiv { 2 copy readstring pop pop } repeat
- 2 copy 0 8 -1 roll 2 index length mod getinterval readstring pop pop pop
- % Stack: ilength save dfilter
- exch restore exch () /SubFileDecode filter
- } bind def
-
- % Run a packed library file.
- /.runpackedlibfile % <filename> <ostart> <olength> <istart> <ilength>
- % .runpackedlibfile
- { 5 -1 roll findlibfile
- { exch pop dup 6 2 roll .packedfilefilter
- currentobjectformat exch 1 setobjectformat run
- setobjectformat closefile
- }
- { 5 1 roll /findlibfile load /undefinedfilename signalerror
- }
- ifelse
- } bind def
-
- % ---------------- Compacted font support ---------------- %
-
- % Compacted fonts written by wrfont.ps depend on the existence and
- % specifications of the procedures and data in this section.
-
- /.compactfontdefault mark
- /PaintType 0
- /FontMatrix [0.001 0 0 0.001 0 0] readonly
- /FontType 1
- /Encoding StandardEncoding
- .dicttomark readonly def
-
- /.checkexistingfont % <fontname> <uid> <privatesize> <fontsize>
- % .checkexistingfont
- % {} (<font> on d-stack)
- % <fontname> <uid> <privatesize> <fontsize>
- % .checkexistingfont
- % -save- --restore-- (<font> on d-stack)
- { FontDirectory 4 index .knownget
- { dup /UniqueID .knownget
- { 4 index eq exch /FontType get 1 eq and }
- { pop false }
- ifelse
- }
- { false
- }
- ifelse
- { save /restore load 6 2 roll }
- { {} 5 1 roll }
- ifelse
- dict //.compactfontdefault exch .copydict begin
- dict /Private exch def
- Private begin
- /MinFeature {16 16} def
- /Password 5839 def
- /UniqueID 1 index def
- end
- /UniqueID exch def
- /FontName exch def
- } bind def
-
- /.knownEncodings [
- ISOLatin1Encoding
- StandardEncoding
- SymbolEncoding
- ] readonly def
-
- /.readCharStrings % <count> <encrypt> .readCharStrings <dict>
- { exch dup dict dup 3 -1 roll
- { currentfile token pop dup type /integertype eq
- { dup -8 bitshift //.knownEncodings exch get exch 255 and get } if
- currentfile token pop dup type /nametype eq
- { 2 index exch get
- }
- { % Stack: encrypt dict dict key value
- 4 index { 4330 exch dup .type1encrypt exch pop } if
- readonly
- }
- ifelse put dup
- }
- repeat pop exch pop
- } bind def
-