ref: 985b2457cda207c2c65edeb647aedbb6e92dac46
dir: /sys/src/cmd/gs/lib/gs_pfile.ps/
% Copyright (C) 1994, 1995 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_pfile.ps,v 1.5 2003/08/08 18:45:05 ray Exp $
% 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 64000 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