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%!
% config.a4grid
% Configuration and header file for dvips. Load with: dvips -P a4grid
%
% Draw a line grid in millimetres, starting from the top-left of the page.
% The resulting grid can be used for measuring page layout.
%
% This code is based on code from the book
%
% @Book{Merz:PostscriptAcrobatBibel,
% author = "Thomas Merz",
% title = "Die PostScript- und Acrobat-Bibel. Was Sie schon
% immer {\"u}ber PostScript und Acrobat/{PDF} wissen
% wollten",
% publisher = "Thomas Merz Verlag",
% year = "1996",
% address = "M{\"u}nchen",
% edition = "1",
% ISBN = "3-9804943-0-6",
% }
% @Book{Merz:PostscriptAcrobatBible,
% author = "Thomas Merz",
% title = "PostScript & acrobat/{PDF}: applications,
% troubleshooting, and cross-platform publishing",
% publisher = "Springer",
% year = "1997",
% address = "Berlin",
% ISBN = "3-540-60854-0",
% }
%
% The original code can be found in file ps/eps/gitter.ps on the CD which
% accompanies the German edition.
% The original code is copyright (C) Thomas Merz 1994-96.
% Incorporation of the original code into this file is with permission of
% Thomas Merz.
% For further information about the book see http://www.pdflib.com/
%
% This file is built so it can be used both as the header file for
% PostScript and as the configuration file for dvips.
% (Note that dvips ignores any lines beginning with a space or a "%".)
%
% Copyright (C) 1995-2006 by Volker Kuhlmann.
% Released under the terms of the GNU General Public License (GPL) Version 2.
% See http://www.gnu.org/ for details.
%
% Volker Kuhlmann <VolkerKuhlmann@gmx.de>
% 25, 26 Oct 1997; 25 Jan 1998; 9 Mar 2000; 11 May 2006
%
/dr@wgrid {
save
25 dict begin
% usable units:
/mm {25.4 div 72 mul} bind def
% Paper height
/grid@paperheight 297 mm def % A4
% Start Y scale from the top, down.
0 grid@paperheight translate
/gridunit 1 mm def % the grid unit, in PostScript points
/step 5 def % grid line increment, in grid units
/medstep 10 def % solid grid lines every this many grid units
/numstep 20 def % numbered grid lines every this many grid units
/FontSize 10 def % font size of numbers
/numstepunit numstep gridunit mul def
%initgraphics % don't use - can stuff things up and is not necessary
newpath 0 setlinecap 0 setlinejoin 10 setmiterlimit
clippath pathbbox newpath
cvi /ury exch def
cvi /urx exch def
% This seems to be designed to ensure llx,lly are a little too big.
% Unfortunately, a lly of -0.19 becomes -10, doing bad things to the grid
% position (i.e. it's totally wrong), with grid units other than 1.
% -> Use the nearest integer, as for urx, ury.
%10 div floor 10 mul cvi /lly exch def
%10 div floor 10 mul cvi /llx exch def
cvi /lly exch def
cvi /llx exch def
urx llx sub /lenx exch def
ury lly sub /leny exch def
/snaptopixel {
transform
.25 sub round .25 add exch
.25 sub round .25 add exch
itransform
} bind def
0.01 setlinewidth
[1 2] 0 setdash % dashed line
0 setgray
/set-line-style {
dup gridunit div round cvi medstep mod 0 eq { [ ] 0 setdash } if
dup gridunit div round cvi numstep mod 0 eq { 0.4 setlinewidth } if
dup gridunit div round cvi 0 eq { 0.6 setlinewidth } if
} bind def
llx step gridunit mul urx { % draw vertical lines
gsave
set-line-style
lly snaptopixel moveto 0 leny snaptopixel rlineto stroke
grestore
} for
ury step gridunit mul neg lly { % draw horizontal lines
gsave
set-line-style
llx exch snaptopixel moveto lenx 0 snaptopixel rlineto stroke
grestore
} for
% circle at (0,0)
[ ] 0 setdash 1 setlinewidth newpath 15 0 moveto 0 0 15 0 360 arc stroke
/kreis { % clip light circle from existing lines
gsave 1 setgray
%/d (500) stringwidth pop def
dup stringwidth pop /d exch def % adjust circle size to string width
currentpoint FontSize 3 div add exch d 2 div add exch
d 0.6 mul 0 360 arc
fill grestore
} def
% axes labelling font
/Helvetica-Bold findfont FontSize scalefont setfont
0.5 setgray
% print axis labelling, X
llx numstepunit div floor numstepunit mul cvi
numstepunit
urx
{ % for
dup 0 eq
{
pop
}{
%dup 20 grid@paperheight sub moveto % labelling at bottom
dup -27 moveto % labelling at top
gridunit div round cvi
( ) cvs dup stringwidth pop 2 div neg 0 rmoveto
kreis show
} ifelse
} bind for
% print axis labelling, Y
lly numstepunit div floor numstepunit mul cvi
numstepunit
ury
{ % for
dup 0 eq
{
pop
}{
40 1 index moveto
gridunit div round cvi neg
( ) cvs dup stringwidth pop
neg 3 sub FontSize 3 div neg rmoveto
kreis show
} ifelse
} bind for
end restore
} bind def % dr@wgrid
% %% Hook into dvips-generated PS
% at start of page:
%/bop-hook where
% {
% pop
% /@ldbophookgrid /bop-hook load def
% /bop-hook { @ldbophookgrid dr@wgrid } def
% }{
% /bop-hook { dr@wgrid } def
% } ifelse
% at end of page:
/eop-hook where
{
pop
/@ldeophookgrid /eop-hook load def
/eop-hook { @ldeophookgrid dr@wgrid } def
}{
/eop-hook { dr@wgrid } def
} ifelse
%
{ % start a procedure so PostScript `ignores' the dvips configuration part.
h config.a4grid
} pop % PostScript cleanup
%
% EOF config.a4grid
|
