%
% PostScript prolog.
% Copyright (c) 1995, 1996, 1997 Markku Rossi.
%
% Author: Markku Rossi <mtr@iki.fi>
%
%
% This file is part of GNU enscript.
%
% 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, 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; see the file COPYING. If not, write to
% the Free Software Foundation, 59 Temple Place - Suite 330,
% Boston, MA 02111-1307, USA.
%
% -- code follows this line --
%
% Procedures.
%
/_S { % save current state
/_s save def
} def
/_R { % restore from saved state
_s restore
} def
/S { % showpage protecting gstate
gsave
showpage
grestore
} bind def
/MF { % fontname newfontname -> - make a new encoded font
/newfontname exch def
/fontname exch def
/fontdict fontname findfont def
/newfont fontdict maxlength dict def
fontdict {
exch
dup /FID eq {
% skip FID pair
pop pop
} {
% copy to the new font dictionary
exch newfont 3 1 roll put
} ifelse
} forall
newfont /FontName newfontname put
% insert only valid encoding vectors
encoding_vector length 256 eq {
newfont /Encoding encoding_vector put
} if
newfontname newfont definefont pop
} def
/SF { % fontname width height -> - set a new font
/height exch def
/width exch def
findfont
[width 0 0 height 0 0] makefont setfont
} def
/SUF { % fontname width height -> - set a new user font
/height exch def
/width exch def
/F-gs-user-font MF
/F-gs-user-font width height SF
} def
/M {moveto} bind def
/s {show} bind def
/Box { % x y w h -> - define box path
/d_h exch def /d_w exch def /d_y exch def /d_x exch def
d_x d_y moveto
d_w 0 rlineto
0 d_h rlineto
d_w neg 0 rlineto
closepath
} def
/bgs { % x y height blskip gray str -> - show string with bg color
/str exch def
/gray exch def
/blskip exch def
/height exch def
/y exch def
/x exch def
gsave
x y blskip sub str stringwidth pop height Box
gray setgray
fill
grestore
x y M str s
} def
% Highlight bars.
/highlight_bars { % nlines lineheight output_y_margin gray -> -
gsave
setgray
/ymarg exch def
/lineheight exch def
/nlines exch def
% This 2 is just a magic number to sync highlight lines to text.
0 d_header_y ymarg sub 2 sub translate
/cw d_output_w cols div def
/nrows d_output_h ymarg 2 mul sub lineheight div cvi def
% for each column
0 1 cols 1 sub {
cw mul /xp exch def
% for each rows
0 1 nrows 1 sub {
/rn exch def
rn lineheight mul neg /yp exch def
rn nlines idiv 2 mod 0 eq {
% Draw highlight bar. 4 is just a magic indentation.
xp 4 add yp cw 8 sub lineheight neg Box fill
} if
} for
} for
grestore
} def
% Line highlight bar.
/line_highlight { % x y width height gray -> -
gsave
/gray exch def
Box gray setgray fill
grestore
} def
% Column separator lines.
/column_lines {
gsave
.1 setlinewidth
0 d_footer_h translate
/cw d_output_w cols div def
1 1 cols 1 sub {
cw mul 0 moveto
0 d_output_h rlineto stroke
} for
grestore
} def
% Column borders.
/column_borders {
gsave
.1 setlinewidth
0 d_footer_h moveto
0 d_output_h rlineto
d_output_w 0 rlineto
0 d_output_h neg rlineto
closepath stroke
grestore
} def
% Do the actual underlay drawing
/draw_underlay {
ul_style 0 eq {
ul_str true charpath stroke
} {
ul_str show
} ifelse
} def
% Underlay
/underlay { % - -> -
gsave
0 d_page_h translate
d_page_h neg d_page_w atan rotate
ul_gray setgray
ul_font setfont
/dw d_page_h dup mul d_page_w dup mul add sqrt def
ul_str stringwidth pop dw exch sub 2 div ul_h_ptsize -2 div moveto
draw_underlay
grestore
} def
/user_underlay { % - -> -
gsave
ul_x ul_y translate
ul_angle rotate
ul_gray setgray
ul_font setfont
0 0 ul_h_ptsize 2 div sub moveto
draw_underlay
grestore
} def
% Page prefeed
/page_prefeed { % bool -> -
statusdict /prefeed known {
statusdict exch /prefeed exch put
} {
pop
} ifelse
} def
% Wrapped line markers
/wrapped_line_mark { % x y charwith charheight type -> -
/type exch def
/h exch def
/w exch def
/y exch def
/x exch def
type 2 eq {
% Black boxes (like TeX does)
gsave
0 setlinewidth
x w 4 div add y M
0 h rlineto w 2 div 0 rlineto 0 h neg rlineto
closepath fill
grestore
} {
type 3 eq {
% Small arrows
gsave
.2 setlinewidth
x w 2 div add y h 2 div add M
w 4 div 0 rlineto
x w 4 div add y lineto stroke
x w 4 div add w 8 div add y h 4 div add M
x w 4 div add y lineto
w 4 div h 8 div rlineto stroke
grestore
} {
% do nothing
} ifelse
} ifelse
} def
% EPSF import.
/BeginEPSF {
/b4_Inc_state save def % Save state for cleanup
/dict_count countdictstack def % Count objects on dict stack
/op_count count 1 sub def % Count objects on operand stack
userdict begin
/showpage { } def
0 setgray 0 setlinecap
1 setlinewidth 0 setlinejoin
10 setmiterlimit [ ] 0 setdash newpath
/languagelevel where {
pop languagelevel
1 ne {
false setstrokeadjust false setoverprint
} if
} if
} bind def
/EndEPSF {
count op_count sub { pos } repeat % Clean up stacks
countdictstack dict_count sub { end } repeat
b4_Inc_state restore
} bind def
% Check PostScript language level.
/languagelevel where {
pop /gs_languagelevel languagelevel def
} {
/gs_languagelevel 1 def
} ifelse