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- % Copyright (C) 1991 Aladdin Enterprises. All rights reserved.
- % Distributed by Free Software Foundation, Inc.
- %
- % This file is part of Ghostscript.
- %
- % Ghostscript is distributed in the hope that it will be useful, but
- % WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- % to anyone for the consequences of using it or for whether it serves any
- % particular purpose or works at all, unless he says so in writing. Refer
- % to the Ghostscript General Public License for full details.
- %
- % Everyone is granted permission to copy, modify and redistribute
- % Ghostscript, but only under the conditions described in the Ghostscript
- % General Public License. A copy of this license is supposed to have been
- % given to you along with Ghostscript so you can know your rights and
- % responsibilities. It should be in a file named COPYING. Among other
- % things, the copyright notice and this notice must be preserved on all
- % copies.
-
- % Extract the ASCII text from a PostScript file. Nothing is displayed.
- % Instead, lines are written to stdout as follows:
- % F <height> - indicate font height
- % S <x> <y> (<string>) - display a string
- % P - end of page
- % <height> is an integer expressed in device pixels.
- % <x> and <y> are integer device coordinates. <string> is a string
- % represented with the standard PostScript escape conventions.
- % The idea is similar to Glenn Reid's `distillery', only a lot more
- % simple-minded, and less robust.
-
- % Note that this code will only work properly if systemdict is writable.
- % For this reason, it is normally read in by gs_init.ps before
- % systemdict is made read-only.
-
- /QUIET true def
- systemdict wcheck { systemdict } { userdict } ifelse begin
-
- % Disable the display operators.
-
- /eofill { newpath } odef
- /erasepage { } odef
- /fill { newpath } odef
- /stroke { newpath } odef
-
- % Image and imagemask must read the input, but do nothing.
-
- /image { gsave nulldevice //image grestore } odef
- /imagemask { gsave nulldevice //imagemask grestore } odef
-
- % Redefine the end-of-page operators.
-
- /copypage { (P\n) //print } odef
- /showpage { copypage erasepage } odef
-
- % Redefine `show'.
-
- /.show.ident matrix def
- /.showfont
- { 0 currentfont /FontBBox get dup 3 get exch 1 get sub
- currentfont /FontMatrix get dtransform dtransform
- exch abs exch abs max round
- (F ) //print //.stdout exch write==only (\n) //print
- } odef
- /.showstring
- { gsave //.show.ident setmatrix
- (S ) //print currentpoint
- exch round dup //.stdout exch write==only ( ) //print
- exch round dup //.stdout exch write==only ( ) //print
- moveto dup //.stdout exch write==only (\n) //print
- grestore stringwidth rmoveto
- } odef
- /show
- { .showfont .showstring
- } odef
-
- % Redefine the other string display operators in terms of `show'.
-
- /.show1 { ( ) dup 0 3 index put exch pop .showstring } odef
- /ashow
- { .showfont
- { .show1 2 copy rmoveto } forall
- exch neg exch neg rmoveto
- } odef
- /widthshow
- { .showfont
- { 2 copy .show1 eq { 1 index 1 index rmoveto } if } forall
- pop pop pop
- }
- /awidthshow
- { .showfont
- { dup .show1 3 index eq { 4 index 4 index rmoveto } if
- 2 copy rmoveto
- } forall
- exch neg exch neg rmoveto
- pop pop pop
- }
- /kshow
- { .showfont
- { .show1 dup exec } forall pop
- } odef
-
- % Redirect the printing operators.
-
- /.stdout (_temp_.out) (w) file def
- /.stderr (_temp_.err) (w) file def
- /print { //.stdout exch writestring } odef
-
- end
-