diff options
author | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
commit | 30dd9f517c9c093ff3319061647a4555264f7914 (patch) | |
tree | 0d7a349bf99be5a42cc9c5a80a30f3b7136c4ccd /Master/xemtex/gslib/ps2ascii.ps | |
parent | 08ab8dce83f53b0f915cb66a37bbc8478b22c307 (diff) |
trunk
git-svn-id: svn://tug.org/texlive/trunk@9 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/xemtex/gslib/ps2ascii.ps')
-rw-r--r-- | Master/xemtex/gslib/ps2ascii.ps | 1509 |
1 files changed, 1509 insertions, 0 deletions
diff --git a/Master/xemtex/gslib/ps2ascii.ps b/Master/xemtex/gslib/ps2ascii.ps new file mode 100644 index 00000000000..44770910fb5 --- /dev/null +++ b/Master/xemtex/gslib/ps2ascii.ps @@ -0,0 +1,1509 @@ +% Copyright (C) 1991, 1995, 1996, 1998, 1999 Aladdin Enterprises. All rights reserved. +% +% This program is free software; you can redistribute it and/or modify it +% under the terms of the GNU General Public License as published by the +% Free Software Foundation; either version 2 of the License, or (at your +% option) any later version. +% +% This program is distributed in the hope that it will be useful, but +% WITHOUT ANY WARRANTY; without even the implied warranty of +% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +% Public License for more details. +% +% You should have received a copy of the GNU General Public License along +% with this program; if not, write to the Free Software Foundation, Inc., +% 59 Temple Place, Suite 330, Boston, MA, 02111-1307. + +% $Id: ps2ascii.ps,v 1.3.2.2.2.1 2003/04/12 14:02:39 giles Exp $ +% Extract the ASCII text from a PostScript file. Nothing is displayed. +% Instead, ASCII information is written to stdout. The idea is similar to +% Glenn Reid's `distillery', only a lot more simple-minded, and less robust. + +% If SIMPLE is defined, just the text is written, with a guess at line +% breaks and word spacing. If SIMPLE is not defined, lines are written +% to stdout as follows: +% +% F <height> <width> (<fontname>) +% Indicate the font height and the width of a space. +% +% P +% Indicate the end of the page. +% +% S <x> <y> (<string>) <width> +% Display a string. +% +% <width> and <height> are integer dimensions in units of 1/720". +% <x> and <y> are integer coordinates, in units of 1/720", with the origin +% at the lower left. +% <string> and <fontname> are strings represented with the standard +% PostScript escape conventions. + +% If COMPLEX is defined, the following additional types of lines are +% written to stdout. +% +% C <r> <g> <b> +% Indicate the current color. +% +% I <x> <y> <width> <height> +% Note the presence of an image. +% +% R <x> <y> <width> <height> +% Fill a rectangle. +% +% <r>, <g>, and <b> are RGB values expressed as integers between 0 and 1000. +% +% Note that future versions of this program (in COMPLEX mode) may add +% other output elements, so programs parsing the output should be +% prepared to ignore elements that they do not recognize. + +% Note that this code will only work in all cases if systemdict is writable +% and if `binding' the definitions of operators defined as procedures +% is deferred. For this reason, it is normally invoked with +% gs -q -dNODISPLAY -dNOBIND -dWRITESYSTEMDICT ps2ascii.ps + +% Thanks to: +% J Greely <jgreely@cis.ohio-state.edu> for improvements to this code; +% Jerry Whelan <jerryw@abode.ccd.bnl.gov> for motivating other improvements; +% David M. Jones <dmjones@theory.lcs.mit.edu> for improvements noted below. + +%% Additional modifications by David M. Jones +%% (dmjones@theory.lcs.mit.edu), December 23, 1997 +%% +%% (a) Rewrote forall loop at the end of .show.write. This fixes a +%% stack leakage problem, but the changes are more significant +%% than that. +%% +%% .char.map includes the names of all characters in the +%% StandardEncoding, ISOLatin1Encoding, OT1Encoding and +%% T1Encoding vectors. Thus, if the Encoding vector for the +%% current font contains a name that is not in .char.map, it's +%% redundant to check if the Encoding vector is equal to one of +%% the known vectors. Previous versions of ps2ascii would give +%% up at this point, and substitute an asterisk (*) for the +%% character. I've taken the liberty of instead using the +%% OT1Encoding vector to translate the character, on the grounds +%% that in the cases I'm most interested in, a font without a +%% useful Encoding vector was most likely created by a DVI to PS +%% converter such as dvips or DVILASER (and OT1Encoding is +%% largely compatible with StandardEncoding anyway). [Note that +%% this does not make my earlier changes to support dvips (see +%% fix (a) under my 1996 changes) completely obsolete, since +%% there's additional useful information I can extract in that +%% case.] +%% +%% Overall, this should provide better support for some documents +%% (e.g, DVILASER documents will no longer be translated into a +%% series of *'s) without breaking any other documents any worse +%% than they already were broken. +%% +%% (b) Fixed two bugs in dvips.df-tail: (1) changed "dup 127" to "dup +%% 128" to fix fencepost error, and (2) gave each font it's own +%% FontName rather than having all fonts share the same name. +%% +%% (c) Added one further refinement to the heuristic for detecting +%% paragraph breaks: do not ever start a new paragraph after a +%% line ending in a hyphen. +%% +%% (d) Added a bunch of missing letters from the T1Encoding, +%% OT1Encoding and ISOLatin1Encoding vectors to .letter.chars to +%% improve hyphen-elimination algorithm. This still won't help +%% if there's no useful Encoding vector. +%% +%% NOTE: A better solution to the problem of missing Encoding vectors +%% might be to redefine definefont to check whether the Encoding +%% vector is sensible and, if not, replace it by a default. This +%% would alleviate the need for constant tests in the .show.write +%% loop, as well as automatically solving the problem noted in fix +%% (d) above, and the similar problem with .break.chars. This should +%% be investigated. Also, the hyphen-elimination algorithm really +%% needs to be looked at carefully and rethought. + +%%* Modifications to ps2ascii.ps by David M. Jones +%%* (dmjones@theory.lcs.mit.edu), June 25-July 8, 1996 + +%%* Modifications: +%%* +%%* (a) added code to give better support for dvips files by providing +%%* FontBBox's, FontName's and Encoding vectors for downloaded +%%* bitmap fonts. This is done by using dvips's start-hook to +%%* overwrite the df-tail and D procedures that dvips uses to +%%* define its Type 3 bitmap fonts. Thus, this change should +%%* provide better support for dvips-generated PS files without +%%* affecting the handling of other documents. +%%* +%%* (b) Fixed two bugs that could potentially affect any PS file, not +%%* just those created by dvips: (1) added missing "get" operator +%%* in .show.write and (2) fixed bug that caused a hyphen at the +%%* end of a line to be replaced by a space rather than begin +%%* deleted. Note that the first bug was a source of stack +%%* leakage, causing ps2ascii to run out of operand stack space +%%* occasionally. +%%* +%%* Search for "%%* BF" to find these modifications. +%%* +%%* (c) Improved the heuristic for determining whether a line break +%%* has occurred and whether a line break represents a paragraph +%%* break. Previously, any change in the vertical position caused +%%* a line break; now a line break is only registered if the +%%* change is larger than the height of the current font. This +%%* means that superscripts, subscripts, and such things as +%%* shifted accents generated by TeX won't cause line breaks. +%%* Paragraph-recognition is now done by comparing the indentation +%%* of the new line to the indentation of the previous line and by +%%* comparing the vertical distance between the new line and the +%%* previous line to the vertical distance between the previous +%%* line and its predecessor. +%%* +%%* (d) Added a hook for renaming the files where stdout and stderr +%%* go. +%%* +%%* In general, my additions or changes to the code are described in +%%* comments beginning with "%%*". However, there are numerous other +%%* places where I have either re-formatted code or added comments to +%%* the code while I was trying to understand it. These are usually +%%* not specially marked. +%%* + +/QUIET true def +systemdict wcheck { systemdict } { userdict } ifelse begin +/.max where { pop } { /.max { 2 copy lt { exch } if pop } bind def } ifelse +/COMPLEX dup where { pop true } { false } ifelse def +/SIMPLE dup where { pop true } { false } ifelse def +/setglobal where + { pop currentglobal /setglobal load true setglobal } + { { } } +ifelse + +% Define a way to store and retrieve integers that survives save/restore. +/.i.string0 (0 ) def +/.i.string .i.string0 length string def +/.iget { cvi } bind def +/.iput { exch //.i.string exch copy cvs pop } bind def +/.inew { //.i.string0 dup length string copy } bind def + +% We only want to redefine operators if they are defined already. + +/codef { 1 index where { pop def } { pop pop } ifelse } def + +% Redefine the end-of-page operators. + +/erasepage { } codef +/copypage { SIMPLE { (\014) } { (P\n) } ifelse //print } codef +/showpage { copypage erasepage initgraphics } codef + +% Redefine the fill operators to detect rectangles. + +/.orderrect % <llx> <lly> <urx> <ury> .orderrect <llx> <lly> <w> <h> + { % Ensure llx <= urx, lly <= ury. + 1 index 4 index lt { 4 2 roll } if + dup 3 index lt { 3 1 roll exch } if + exch 3 index sub exch 2 index sub + } odef +/.fillcomplex + { % Do a first pass to see if the path is all rectangles in + % the output coordinate system. We don't worry about overlapping + % rectangles that might be partially not filled. + % Stack: mark llx0 lly0 urx0 ury0 ... true mark x0 y0 ... + mark true mark + % Add a final moveto so we pick up any trailing unclosed subpath. + 0 0 itransform moveto + { .coord counttomark 2 gt + { counttomark 4 gt { .fillcheckrect } { 4 2 roll pop pop } ifelse } + if + } + { .coord } + { cleartomark not mark exit } + { counttomark -2 roll 2 copy counttomark 2 roll .fillcheckrect } + pathforall cleartomark + { .showcolor counttomark 4 idiv + { counttomark -4 roll .orderrect + (R ) //print .show==4 + } + repeat pop + } + { cleartomark + } + ifelse + } odef +/.fillcheckrect + { % Check whether the current subpath is a rectangle. + % If it is, add it to the list of rectangles being accumulated; + % if not exit the .fillcomplex loop. + % The subpath has not been closed. + % Stack: as in .fillcomplex, + newx newy + counttomark 10 eq { 9 index 9 index 4 2 roll } if + counttomark 12 ne { cleartomark not mark exit } if + 12 2 roll + % Check for the two possible forms of rectangles: + % x0 y0 x0 y1 x1 y1 x1 y0 x0 y0 + % x0 y0 x1 y0 x1 y1 x0 y1 x0 y0 + 9 index 2 index eq 9 index 2 index eq and + 10 index 9 index eq + { % Check for first form. + 7 index 6 index eq and 6 index 5 index eq and 3 index 2 index eq and + } + { % Check for second form. + 9 index 8 index eq and + 8 index 7 index eq and 5 index 4 index eq and 4 index 3 index eq and + } + ifelse not { cleartomark not mark exit } if + % We have a rectangle. + pop pop pop pop 4 2 roll pop pop 8 4 roll + } odef +/eofill { COMPLEX { .fillcomplex } if newpath } codef +/fill { COMPLEX { .fillcomplex } if newpath } codef +/rectfill { gsave newpath .rectappend fill grestore } codef +/ueofill { gsave newpath uappend eofill grestore } codef +/ufill { gsave newpath uappend fill grestore } codef + +% Redefine the stroke operators to detect rectangles. + +/rectstroke + { gsave newpath + dup type dup /arraytype eq exch /packedarraytype eq or + { dup length 6 eq { exch .rectappend concat } { .rectappend } ifelse } + { .rectappend } + ifelse stroke grestore + } codef +/.strokeline % <fromx> <fromy> <tox> <toy> .strokeline <tox> <toy> + % Note: fromx and fromy are in output coordinates; + % tox and toy are in user coordinates. + { .coord 2 copy 6 2 roll .orderrect + % Add in the line width. Assume square or round caps. + currentlinewidth 2 div dup .dcoord add abs 1 .max 5 1 roll + 4 index add 4 1 roll 4 index add 4 1 roll + 4 index sub 4 1 roll 5 -1 roll sub 4 1 roll + (R ) //print .show==4 + } odef +/.strokecomplex + { % Do a first pass to see if the path is all horizontal and vertical + % lines in the output coordinate system. + % Stack: true mark origx origy curx cury + true mark null null null null + { .coord 6 2 roll pop pop pop pop 2 copy } + { .coord 1 index 4 index eq 1 index 4 index eq or + { 4 2 roll pop pop } + { cleartomark not mark exit } + ifelse + } + { cleartomark not mark exit } + { counttomark -2 roll 2 copy counttomark 2 roll + 1 index 4 index eq 1 index 4 index eq or + { pop pop 2 copy } + { cleartomark not mark exit } + ifelse + } + pathforall cleartomark + 0 currentlinewidth .dcoord 0 eq exch 0 eq or and + % Do the second pass to write out the rectangles. + % Stack: origx origy curx cury + { .showcolor null null null null + { 6 2 roll pop pop pop pop 2 copy .coord } + { .strokeline } + { } + { 3 index 3 index .strokeline } + pathforall pop pop pop pop + } + if + } odef +/stroke { COMPLEX { .strokecomplex } if newpath } codef +/ustroke + { gsave newpath + dup length 6 eq { exch uappend concat } { uappend } ifelse + stroke grestore + } codef + +% The image operators must read the input and note the dimensions. +% Eventually we should redefine these to detect 1-bit-high all-black images, +% since this is how dvips does underlining (!). + +/.noteimagerect % <width> <height> <matrix> .noteimagerect - + { COMPLEX + { gsave setmatrix itransform 0 0 itransform + grestore .coord 4 2 roll .coord .orderrect + (I ) //print .show==4 + } + { pop pop pop + } + ifelse + } odef +/colorimage where + { pop /colorimage + { 1 index + { dup 6 add index 1 index 6 add index 2 index 5 add index } + { 6 index 6 index 5 index } + ifelse .noteimagerect gsave nulldevice //colorimage grestore + } codef + } if +/.noteimage % Arguments as for image[mask] + { dup type /dicttype eq + { dup /Width get 1 index /Height get 2 index /ImageMatrix get } + { 4 index 4 index 3 index } + ifelse .noteimagerect + } odef +/image { .noteimage gsave nulldevice //image grestore } codef +/imagemask { .noteimage gsave nulldevice //imagemask grestore } codef + +% Output the current color if necessary. +/.color.r .inew def + .color.r -1 .iput % make sure we write the color at the beginning +/.color.g .inew def +/.color.b .inew def +/.showcolor + { COMPLEX + { currentrgbcolor + 1000 mul round cvi + 3 1 roll 1000 mul round cvi + exch 1000 mul round cvi + % Stack: b g r + dup //.color.r .iget eq + 2 index //.color.g .iget eq and + 3 index //.color.b .iget eq and + { pop pop pop + } + { (C ) //print + dup //.color.r exch .iput .show==only + ( ) //print dup //.color.g exch .iput .show==only + ( ) //print dup //.color.b exch .iput .show==only + (\n) //print + } + ifelse + } + if + } bind def + +% Redefine `show'. + +% Set things up so our output will be in tenths of a point, with origin at +% lower left. This isolates us from the peculiarities of individual devices. + +/.show.ident.matrix matrix def +/.show.ident { % - .show.ident <scale> <matrix> +% //.show.ident.matrix defaultmatrix +% % Assume the original transformation is well-behaved. +% 0.1 0 2 index dtransform abs exch abs .max /.show.scale exch def +% 0.1 dup 3 -1 roll scale + gsave initmatrix + % Assume the original transformation is well-behaved... + 0.1 0 dtransform abs exch abs .max + 0.1 dup scale .show.ident.matrix currentmatrix + % ... but undo any rotation into landscape orientation. + dup 0 get 0 eq { + 1 get dup abs div 90 mul rotate + .show.ident.matrix currentmatrix + } if + grestore +} bind def + +/.coord { % <x> <y> .coord <x'> <y'> + transform .show.ident exch pop itransform + exch round cvi exch round cvi +} odef + +/.dcoord { % <dx> <dy> .coord <dx'> <dy'> + % Transforming distances is trickier, because + % the coordinate system might be rotated. + .show.ident pop 3 1 roll + exch 0 dtransform + dup mul exch dup mul add sqrt + 2 index div round cvi + exch 0 exch dtransform + dup mul exch dup mul add sqrt + 3 -1 roll div round cvi +} odef + +% Remember the current X, Y, and height. +/.show.x .inew def +/.show.y .inew def +/.show.height .inew def + +% Remember the last character of the previous string; if it was a +% hyphen preceded by a letter, we didn't output the hyphen. + +/.show.last (\000) def + +% Remember the current font. +/.font.name 130 string def +/.font.name.length .inew def +/.font.height .inew def +/.font.width .inew def + +%%* Also remember indentation of current line and previous vertical +%%* skip + +/.show.indent .inew def +/.show.dy .inew def + +% We have to redirect stdout somehow.... + +/.show.stdout { (%stdout) (w) file } bind def + +% Make sure writing will work even if a program uses =string. +/.show.string =string length string def +/.show.=string =string length string def +/.show==only + { //=string //.show.=string copy pop + dup type /stringtype eq + { dup length //.show.string length le + { dup rcheck { //.show.string copy } if + } if + } if + .show.stdout exch write==only + //.show.=string //=string copy pop + } odef +/.show==4 + { 4 -1 roll .show==only ( ) //print + 3 -1 roll .show==only ( ) //print + exch .show==only ( ) //print + .show==only (\n) //print + } odef + +/.showwidth % Same as stringwidth, but disable COMPLEX so that + % we don't try to detect rectangles during BuildChar. + { COMPLEX + { /COMPLEX false def stringwidth /COMPLEX true def } + { stringwidth } + ifelse + } odef + +/.showfont % <string> .showfont <string> + { gsave + % Try getting the height and width of the font from the FontBBox. + currentfont /FontBBox .knownget not { {0 0 0 0} } if + aload pop % llx lly urx ury + exch 4 -1 roll % lly ury urx llx + sub % lly ury dx + 3 1 roll exch % dx ury lly + sub % dx dy + 2 copy .max 0 ne + { currentfont /FontMatrix get dtransform + } + { pop pop + % Fonts produced by dvips, among other applications, have + % BuildChar procedures that bomb out when given unexpected + % characters, and there is no way to determine whether a given + % character will do this. So for Type 1 fonts, we measure a + % typical character ('X'); for others, we punt. + currentfont /FontType get 1 eq + { (X) .showwidth pop dup 1.3 mul + } + { % No safe way to get the character size. Punt. + 0 0 + } + ifelse + } + ifelse .dcoord exch + currentfont /FontName .knownget not { () } if + dup type /stringtype ne { //.show.string cvs } if + grestore + % Stack: height width fontname + SIMPLE + { pop pop //.show.height exch .iput } + { 2 index //.font.height .iget eq + 2 index //.font.width .iget eq and + 1 index //.font.name 0 //.font.name.length .iget getinterval eq and + { pop pop pop + } + { (F ) //print + 3 -1 roll dup //.font.height exch .iput .show==only ( ) //print + exch dup //.font.width exch .iput .show==only ( ) //print + dup length //.font.name.length exch .iput + //.font.name cvs .show==only (\n) //print + } + ifelse + } + ifelse + } odef + +% Define the letters -- characters which, if they occur followed by a hyphen +% at the end of a line, cause the hyphen and line break to be ignored. +/.letter.chars 100 dict def +mark + 65 1 90 { dup 32 add } for + counttomark + { StandardEncoding exch get .letter.chars exch dup put } + repeat +pop + +%%* Add the rest of the letters from the [O]T1Encoding and +%%* ISOLatin1Encoding vectors + +mark + /AE + /Aacute + /Abreve + /Acircumflex + /Adieresis + /Agrave + /Aogonek + /Aring + /Atilde + /Cacute + /Ccaron + /Ccedilla + /Dcaron + /Eacute + /Ecaron + /Ecircumflex + /Edieresis + /Egrave + /Eng + /Eogonek + /Eth + /Gbreve + /Germandbls + /IJ + /Iacute + /Icircumflex + /Idieresis + /Idot + /Igrave + /Lacute + /Lcaron + /Lslash + /Nacute + /Ncaron + /Ntilde + /OE + /Oacute + /Ocircumflex + /Odieresis + /Ograve + /Ohungarumlaut + /Oslash + /Otilde + /Racute + /Rcaron + /Sacute + /Scaron + /Scedilla + /Tcaron + /Tcedilla + /Thorn + /Uacute + /Ucircumflex + /Udieresis + /Ugrave + /Uhungarumlaut + /Uring + /Yacute + /Ydieresis + /Zacute + /Zcaron + /Zdot + /aacute + /abreve + /acircumflex + /adieresis + /ae + /agrave + /aogonek + /aring + /atilde + /cacute + /ccaron + /ccedilla + /dbar + /dcaron + /dotlessi + /dotlessj + /eacute + /ecaron + /ecircumflex + /edieresis + /egrave + /eng + /eogonek + /eth + /exclamdown + /ff + /ffi + /ffl + /fi + /fl + /gbreve + /germandbls + /iacute + /icircumflex + /idieresis + /igrave + /ij + /lacute + /lcaron + /lslash + /nacute + /ncaron + /ntilde + /oacute + /ocircumflex + /odieresis + /oe + /ograve + /ohungarumlaut + /oslash + /otilde + /questiondown + /racute + /rcaron + /sacute + /scaron + /scedilla + /section + /sterling + /tcaron + /tcedilla + /thorn + /uacute + /ucircumflex + /udieresis + /ugrave + /uhungarumlaut + /uring + /yacute + /ydieresis + /zacute + /zcaron + /zdot +counttomark + { .letter.chars exch dup put } +repeat +pop + +% Define a set of characters which, if they occur at the start of a line, +% are taken as indicating a paragraph break. +/.break.chars 50 dict def +mark + /bullet /dagger /daggerdbl /periodcentered /section + counttomark + { .break.chars exch dup put } + repeat +pop + +% Define character translation to ASCII. +% We have to do this for the entire character set. + +/.char.map 500 dict def + +/.chars.def { counttomark 2 idiv { .char.map 3 1 roll put } repeat pop } def + +% Encode the printable ASCII characters. + +mark 32 1 126 + { 1 string dup 0 4 -1 roll put + dup 0 get StandardEncoding exch get exch + } +for .chars.def + + % Encode accents. +mark + /acute (') + /caron (^) + /cedilla (,) + /circumflex (^) + /dieresis (") + /grave (`) + /ring (*) + /tilde (~) +.chars.def + + % Encode the ISO accented characters. +mark 192 1 255 + { ISOLatin1Encoding exch get =string cvs + dup 0 1 getinterval 1 index dup length 1 sub 1 exch getinterval + .char.map 2 index known .char.map 2 index known and + { .char.map 3 -1 roll get .char.map 3 -1 roll get concatstrings + .char.map 3 1 roll put + } + { pop pop pop + } + ifelse + } +for .chars.def + +% Encode the remaining standard and ISO alphabetic characters. + +mark + /AE (AE) /Eth (DH) /OE (OE) /Thorn (Th) + /ae (ae) /eth (dh) + /ffi (ffi) /ffl (ffl) /fi (fi) /fl (fl) + /germandbls (ss) /oe (oe) /thorn (th) +.chars.def + +% Encode the other standard and ISO characters. + +mark + /brokenbar (|) /bullet (*) /copyright ((C)) /currency (#) + /dagger (#) /daggerdbl (##) /degree (o) /divide (/) /dotaccent (.) + /dotlessi (i) + /ellipsis (...) /emdash (--) /endash (-) /exclamdown (!) + /florin (f) /fraction (/) + /guillemotleft (<<) /guillemotright (>>) + /guilsinglleft (<) /guilsinglright (>) /hungarumlaut ("") /logicalnot (~) + /macron (_) /minus (-) /mu (u) /multiply (*) + /ogonek (,) /onehalf (1/2) /onequarter (1/4) /onesuperior (1) + /ordfeminine (-a) /ordmasculine (-o) + /paragraph (||) /periodcentered (*) /perthousand (o/oo) /plusminus (+-) + /questiondown (?) /quotedblbase (") /quotedblleft (") /quotedblright (") + /quotesinglbase (,) /quotesingle (') /registered ((R)) + /section ($) /sterling (#) + /threequarters (3/4) /threesuperior (3) /trademark ((TM)) /twosuperior (2) + /yen (Y) +.chars.def + +% Encode a few common Symbol characters. + +mark + /asteriskmath (*) /copyrightsans ((C)) /copyrightserif ((C)) + /greaterequal (>=) /lessequal (<=) /registersans ((R)) /registerserif ((R)) + /trademarksans ((TM)) /trademarkserif ((TM)) +.chars.def + +%%* Add a few characters from StandardEncoding and ISOLatin1Encoding +%%* that were missing. + +mark + /cent (c) + /guilsinglleft (<) + /guilsinglright (>) + /breve (*) + /Lslash (L/) + /lslash (l/) +.chars.def + +%%* Define the OT1Encoding and T1Encoding vectors for use with dvips +%%* files. Unfortunately, there's no way of telling what font is +%%* really being used within a dvips document, so we can't provide an +%%* appropriate encoding for each individual font. Instead, we'll +%%* just provide support for the two most popular text encodings, the +%%* OT1 and T1 encodings, and just accept the fact that any font not +%%* using one of those encodings will be rendered as gibberish. +%%* +%%* OT1 is Knuth's 7-bit encoding for the CMR text fonts, while T1 +%%* (aka the Cork encoding) is the 8-bit encoding used by the DC +%%* fonts, a preliminary version of the proposed Extended Computer +%%* Modern fonts. Unfortunately, T1 is not a strict extension of OT1; +%%* they differ in positions 8#000 through 8#040, 8#074, 8#076, 8#134, +%%* 8#137, 8#173, 8#174, 8#175 and 8#177, so we can't use the same +%%* vector for both. +%%* +%%* Of course, we also can't reliably tell the difference between an +%%* OT1-encoded font and a T1-encoded font based on the information in +%%* a dvips-created PostScript file. As a best-guess solution, we'll +%%* use the T1 encoding if the font contains any characters in +%%* positions above 8#177 and the OT1 encoding if it doesn't. + +/T1Encoding 256 array def + +/OT1Encoding 256 array def + +%%* T1Encoding shares a lot with StandardEncoding, so let's start +%%* there. + +StandardEncoding T1Encoding copy pop + +/OT1.encode { + counttomark + 2 idiv + { OT1Encoding 3 1 roll put } + repeat + cleartomark +} def + +/T1.encode { + counttomark + 2 idiv + { T1Encoding 3 1 roll put } + repeat + cleartomark +} def + +mark + 8#000 /grave + 8#001 /acute + 8#002 /circumflex + 8#003 /tilde + 8#004 /dieresis + 8#005 /hungarumlaut + 8#006 /ring + 8#007 /caron + + 8#010 /breve + 8#011 /macron + 8#012 /dotaccent + 8#013 /cedilla + 8#014 /ogonek + 8#015 /quotesinglbase + 8#016 /guilsinglleft + 8#017 /guilsinglright + + 8#020 /quotedblleft + 8#021 /quotedblright + 8#022 /quotedblbase + 8#023 /guillemotleft + 8#024 /guillemotright + 8#025 /endash + 8#026 /emdash + 8#027 /cwm + + 8#030 /perthousandzero + 8#031 /dotlessi + 8#032 /dotlessj + 8#033 /ff + 8#034 /fi + 8#035 /fl + 8#036 /ffi + 8#037 /ffl + +%% 8#040 through 8#176 follow StandardEncoding + + 8#177 /hyphen +T1.encode + +mark + 8#200 /Abreve + 8#201 /Aogonek + 8#202 /Cacute + 8#203 /Ccaron + 8#204 /Dcaron + 8#205 /Ecaron + 8#206 /Eogonek + 8#207 /Gbreve + 8#210 /Lacute + 8#211 /Lcaron + 8#212 /Lslash + 8#213 /Nacute + 8#214 /Ncaron + 8#215 /Eng + 8#216 /Ohungarumlaut + 8#217 /Racute + 8#220 /Rcaron + 8#221 /Sacute + 8#222 /Scaron + 8#223 /Scedilla + 8#224 /Tcaron + 8#225 /Tcedilla + 8#226 /Uhungarumlaut + 8#227 /Uring + 8#230 /Ydieresis + 8#231 /Zacute + 8#232 /Zcaron + 8#233 /Zdot + 8#234 /IJ + 8#235 /Idot + 8#236 /dbar + 8#237 /section + 8#240 /abreve + 8#241 /aogonek + 8#242 /cacute + 8#243 /ccaron + 8#244 /dcaron + 8#245 /ecaron + 8#246 /eogonek + 8#247 /gbreve + 8#250 /lacute + 8#251 /lcaron + 8#252 /lslash + 8#253 /nacute + 8#254 /ncaron + 8#255 /eng + 8#256 /ohungarumlaut + 8#257 /racute + 8#260 /rcaron + 8#261 /sacute + 8#262 /scaron + 8#263 /scedilla + 8#264 /tcaron + 8#265 /tcedilla + 8#266 /uhungarumlaut + 8#267 /uring + 8#270 /ydieresis + 8#271 /zacute + 8#272 /zcaron + 8#273 /zdot + 8#274 /ij + 8#275 /exclamdown + 8#276 /questiondown + 8#277 /sterling + + 8#300 /Agrave + 8#301 /Aacute + 8#302 /Acircumflex + 8#303 /Atilde + 8#304 /Adieresis + 8#305 /Aring + 8#306 /AE + 8#307 /Ccedilla + 8#310 /Egrave + 8#311 /Eacute + 8#312 /Ecircumflex + 8#313 /Edieresis + 8#314 /Igrave + 8#315 /Iacute + 8#316 /Icircumflex + 8#317 /Idieresis + 8#320 /Eth + 8#321 /Ntilde + 8#322 /Ograve + 8#323 /Oacute + 8#324 /Ocircumflex + 8#325 /Otilde + 8#326 /Odieresis + 8#327 /OE + 8#330 /Oslash + 8#331 /Ugrave + 8#332 /Uacute + 8#333 /Ucircumflex + 8#334 /Udieresis + 8#335 /Yacute + 8#336 /Thorn + 8#337 /Germandbls + + 8#340 /agrave + 8#341 /aacute + 8#342 /acircumflex + 8#343 /atilde + 8#344 /adieresis + 8#345 /aring + 8#346 /ae + 8#347 /ccedilla + 8#350 /egrave + 8#351 /eacute + 8#352 /ecircumflex + 8#353 /edieresis + 8#354 /igrave + 8#355 /iacute + 8#356 /icircumflex + 8#357 /idieresis + 8#360 /eth + 8#361 /ntilde + 8#362 /ograve + 8#363 /oacute + 8#364 /ocircumflex + 8#365 /otilde + 8#366 /odieresis + 8#367 /oe + 8#370 /oslash + 8#371 /ugrave + 8#372 /uacute + 8#373 /ucircumflex + 8#374 /udieresis + 8#375 /yacute + 8#376 /thorn + 8#377 /germandbls + +T1.encode + +%%* Now copy OT1Encoding into T1Encoding and make a few changes. + +T1Encoding OT1Encoding copy pop + +mark + 8#000 /Gamma + 8#001 /Delta + 8#002 /Theta + 8#003 /Lambda + 8#004 /Xi + 8#005 /Pi + 8#006 /Sigma + 8#007 /Upsilon + + 8#010 /Phi + 8#011 /Psi + 8#012 /Omega + 8#013 /ff + 8#014 /fi + 8#015 /fl + 8#016 /ffi + 8#017 /ffl + + 8#020 /dotlessi + 8#021 /dotlessj + 8#022 /grave + 8#023 /acute + 8#024 /caron + 8#025 /breve + 8#026 /macron + 8#027 /ring + + 8#030 /cedilla + 8#031 /germandbls + 8#032 /ae + 8#033 /oe + 8#034 /oslash + 8#035 /AE + 8#036 /OE + 8#037 /Oslash + + 8#040 /polishslash + + 8#042 /quotedblright + + 8#074 /exclamdown + 8#076 /questiondown + + 8#134 /quotedblleft + 8#137 /dotaccent + + 8#173 /endash + 8#174 /emdash + 8#175 /hungarumlaut + 8#177 /dieresis +OT1.encode + +%%* And add a few characters from the OT1Encoding + +mark + /Gamma (\\Gamma ) + /Delta (\\Delta ) + /Theta (\\Theta ) + /Lambda (\\Lambda ) + /Xi (\\Xi ) + /Pi (\\Pi ) + /Sigma (\\Sigma ) + /Upsilon (\\Upsilon ) + + /Phi (\\Phi ) + /Psi (\\Psi ) + /Omega (\\Omega ) + + /dotlessj (j) + /ff (ff) + + /cwm () + + /perthousandzero (0) + + /polishslash () + + /Abreve (A*) + /Aogonek (A,) + /Cacute (C') + /Ccaron (C^) + /Dcaron (D^) + /Ecaron (E^) + /Eogonek (E,) + /Gbreve (G*) + /Lacute (L') + /Lcaron (L^) + /Nacute (N') + /Ncaron (N^) + /Eng (NG) + /Ohungarumlaut (O"") + /Racute (R') + /Rcaron (R^) + /Sacute (S') + /Scaron (S^) + /Scedilla (S,) + /Tcaron (T^) + /Tcedilla (T,) + /Uhungarumlaut (U"") + /Uring (U*) + /Ydieresis (Y") + /Zacute (Z') + /Zcaron (Z^) + /Zdot (Z.) + /IJ (IJ) + /Idot (I.) + /dbar (d-) + /abreve (a*) + /aogonek (a,) + /cacute (c') + /ccaron (c^) + /dcaron (d^) + /ecaron (e^) + /eogonek (e,) + /gbreve (g*) + /lacute (l') + /lcaron (l^) + /nacute (n') + /ncaron (n^) + /eng (ng) + /ohungarumlaut (o"") + /racute (r') + /rcaron (r^) + /sacute (s') + /scaron (s^) + /scedilla (s,) + /tcaron (t^) + /tcedilla (t,) + /uhungarumlaut (u"") + /uring (u*) + /zacute (z') + /zcaron (z^) + /zdot (z.) + /ij (ij) + /Germandbls (SS) +.chars.def + +%%* We extend the df-tail command to stick in an Encoding vector (see +%%* above for a discussion of the T1 and OT1 encodings), put in a +%%* FontName (which will just be dvips's name for the font, i.e., Fa, +%%* Fb, etc.) and give each font a separate FontBBox instead of +%%* letting them all share a single one. + +/dvips.df-tail % id numcc maxcc df-tail + { + /nn 9 dict N + nn begin + %% + %% Choose an encoding based on the highest position occupied. + %% + dup 128 gt { T1Encoding } { OT1Encoding } ifelse + /Encoding X + /FontType 3 N + %% + %% It's ok for all the fonts to share a FontMatrix, but they + %% need to have separate FontBBoxes + %% + /FontMatrix fntrx N + /FontBBox [0 0 0 0] N + string /base X + array /BitMaps X + %% + %% And let's throw in a FontName for good measure + %% + dup ( ) cvs + %% + %% Make sure each font gets it own private FontName. -- dmj, + %% 12/23/97 + %% + dup length string copy + /FontName X + /BuildChar {CharBuilder} N + end + dup { /foo setfont } + 2 array copy cvx N + load + 0 nn put + /ctr 0 N + [ +} def + +%%* This is functionally equivalent to dvips's /D procedure, but it +%%* also calculates the Font Bounding Box while defining the +%%* characters. + +/dvips.D % char-data ch D - : define character bitmap in current font +{ + /cc X % char-data + dup type /stringtype ne {]} if % char-data + + /ch-data X + nn /base get cc ctr put % (adds ctr to cc'th position of BASE) + nn /BitMaps get + ctr + ch-data % BitMaps ctr char-data + sf 1 ne { + dup dup length 1 sub dup 2 index S get sf div put + } if + put % puts char-data into BitMaps at index ctr + /ctr ctr 1 add N +%% +%% Make sure the Font Bounding Box encloses the Bounding Box of the +%% current character +%% + nn /FontBBox get % BB + + dup % calculate new llx + dup 0 get + ch-xoff + .min + 0 exch put + + dup % calculate new lly + dup 1 get + ch-yoff ch-height sub + .min + 1 exch put + + dup % calculate new urx + dup 2 get + ch-dx ch-width add + .max + 2 exch put + + dup 3 get % calculate new ury + ch-yoff + .max + 3 exch put + +} def + +%%* Define start-hook to replace df-tail and D by our versions. +%%* Unfortunately, the user can redefine start-hook and thus bypass +%%* these changes, but I don't see an obvious way around that. + +userdict /start-hook { + TeXDict /df-tail /dvips.df-tail load bind put + TeXDict /D /dvips.D load bind put +} put + +%%* Introduce a symbolic constant for hyphens. (Need to make +%%* allowance for hyphen being in different place?) + +/.hyphen 45 def + +% Write out a string. If it ends in a letter and a hyphen, +% don't write the hyphen, and set .show.last to a hyphen; +% otherwise, set .show.last to the character (or \000 if it was a hyphen). +/.show.write % <string> + { + dup length 1 ge + { dup dup length 1 sub get % string last_char + dup .hyphen eq % string last_char hyphen? + { % string last_char + 1 index length 1 gt + { 1 index dup length 2 sub get } + { //.show.last 0 get } + ifelse % string last_char prev-char + currentfont /Encoding get exch get % look up prev-char + //.letter.chars exch known % is it a letter? + { % Remove the hyphen % string last_char + exch % last_char string + dup length 1 sub % last_char string len-1 + 0 exch getinterval % last_char string-1 + exch % string-1 last_char + } + { pop 0 } % string 0 + ifelse + } + if + //.show.last 0 3 -1 roll put % store last_char + % in .show.last + % If .show.last == + % hyphen, then + % last char of + % previous string + % was a hyphen + } + if % string + { % begin forall % c + dup % c c + currentfont /Encoding get % c c vec + exch get % c name + dup //.char.map exch known % c name bool + { exch pop } + { pop OT1Encoding exch get } + ifelse % name + //.char.map exch get % translation + .show.stdout exch writestring + } + forall +} odef + +/.showstring1 { % string + currentpoint .coord % string x y + 3 -1 roll dup .showwidth % x y string dx dy + 1 index % x y string dx dy dx + 0 rmoveto % x y string dx dy + .dcoord pop % x y string width + SIMPLE + { % x y string width + 2 index % x y string width y + //.show.y .iget % x y string width y old.y + %%* + %%* Replaced test "has y changed" by "has y changed by more + %%* than the current font height" so that subscripts and + %%* superscripts won't cause line/paragraph breaks + %%* + sub abs dup % x y string width dy dy + //.show.height .iget + gt + { % x y string width dy + + %%* Vertical position has changed by more than the font + %%* height, so we now try to figure out whether we've + %%* started a new paragraph or merely a new line, using a + %%* variety of heuristics. + + %%* If any of the following is true, we start a new + %%* paragraph: + + %%* (a) the current vertical shift is more than 1.1 times + %%* the previous vertical shift, where 1.1 is an + %%* arbitrarily chosen factor that could probably be + %%* refined. + + dup % x y string width dy dy + //.show.dy .iget 1.1 mul + gt + exch + + %%* Save the new vertical shift + + //.show.dy exch .iput + + %%* (b) The vertical shift is more than 1.3 times the + %%* "size" of the current font. I've removed this + %%* test since it's not really very useful. + +%%* //.show.dy .iget +%%* //.show.height .iget 1.4 mul +%%* gt % x y string width bool +%%* .show.height .iget 0 gt and % only perform test if font +%%* % height is nonzero +%%* or + + %%* (c) the first character of the new line is one of the + %%* .break.chars + + 2 index length % x y string width newpar? len + 0 gt % x y string width newpar? len>0? + { + 2 index 0 get % x y string width newpar? s + currentfont /Encoding get + exch get % x y string width newpar? s_enc + //.break.chars exch known { pop true } if + } + if % x y string width newpar? + + %%* (d) The indentation of the new line is greater than + %%* the indentation of the previous line. + + 4 index + //.show.indent .iget + gt + or + + %%* HOWEVER, if the line ends in a hyphen, we do NOT begin + %%* a new paragraph (cf. comment at end of BF2). --dmj, + %%* 12/23/97 + + //.show.last 0 get .hyphen ne + and + + % newpar? + { (\n\n) } % Paragraph + { % Line + %%* + %%* BF2: If last character on a line is + %%* a hyphen, we omit the hyphen and + %%* run the lines together. Of + %%* course, this will fail if a word + %%* with an explicit hyphen (e.g., + %%* X-ray) is split across two lines. + %%* Oh, well. (What should we do + %%* about a hyphen that ends a + %%* "paragraph"? Perhaps that should + %%* inhibit a paragraph break.) + %%* + //.show.last 0 get .hyphen eq + { () } + { ( ) } + ifelse % x y string width char + } + ifelse + //print + + //.show.y 3 index .iput % x y string width + //.show.x 4 index .iput % x y string width + //.show.indent 4 index .iput + } + { % x y string width dy + % If the word processor split a hyphenated word within + % the same line, put out the hyphen now. + pop + //.show.last 0 get .hyphen eq { (-) //print } if + } + ifelse + %%* + %%* If have moved more than 1 point to + %%* the right, interpret it as a + %%* space? This need to be looked at + %%* more closely. + %%* + 3 index % x y string width x + //.show.x .iget 10 add gt % x y string width bool + { ( ) //print } + if + % x y string width + 4 1 roll % width x y string + .show.write pop % width x + add //.show.x exch .iput % <empty> + } + { (S ) //print .show==4 } + ifelse +} odef + +/.showstring + { dup () eq { pop } { .showstring1 } ifelse + } bind def + +% Redefine all the string display operators. + +/show { + .showfont + .showcolor + .showstring +} codef + +% We define all the other operators in terms of .show1. + +/.show1.string ( ) def +/.show1 { //.show1.string exch 0 exch put //.show1.string .showstring } odef +/ashow + { .showfont .showcolor + { .show1 2 copy rmoveto } forall + pop pop + } codef +/awidthshow + { .showfont .showcolor + { dup .show1 4 index eq { 4 index 4 index rmoveto } if + 2 copy rmoveto + } + forall + pop pop pop pop pop + } codef +/widthshow + { .showfont .showcolor + //.show1.string 0 4 -1 roll put + { //.show1.string search not { exit } if + .showstring .showstring + 2 index 2 index rmoveto + } loop + .showstring pop pop + } codef +/kshow + { .showfont .showcolor + %**************** Should construct a closure, in case the procedure + %**************** affects the o-stack. + { .show1 dup exec } forall pop + } codef + +% We don't really do the right thing with the Level 2 show operators, +% but we do something semi-reasonable. +/xshow { pop show } codef +/yshow { pop show } codef +/xyshow { pop show } codef +/glyphshow + { currentfont /Encoding .knownget not { {} } if + 0 1 2 index length 1 sub + { % Stack: glyph encoding index + 2 copy get 3 index eq { exch pop exch pop null exit } if + pop + } + for null eq { (X) dup 0 4 -1 roll put show } { pop } ifelse + } codef + +end + +% Bind the operators we just defined, and all the others if we didn't +% do it before. Also reenable 'bind' for future files. + +.bindoperators +NOBIND currentdict systemdict ne and + { systemdict begin .bindoperators end } +if +NOBIND + { /bind /.bind load def } +if + +% Make systemdict read-only if it wasn't already. + +systemdict wcheck { systemdict readonly pop } if + +% Restore the current local/global VM mode. + +exec + + |