markpath.ps

GhostScript的源代码

%    Copyright (C) 1993 Aladdin Enterprises.  All rights reserved.
% 
% This file is part of Aladdin Ghostscript.
% 
% Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author
% or distributor accepts any responsibility for the consequences of using it,
% or for whether it serves any particular purpose or works at all, unless he
% or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
% License (the "License") for full details.
% 
% Every copy of Aladdin Ghostscript must include a copy of the License,
% normally in a plain ASCII text file named PUBLIC.  The License grants you
% the right to copy, modify and redistribute Aladdin Ghostscript, but only
% under certain conditions described in the License.  Among other things, the
% License requires that the copyright notice and this notice be preserved on
% all copies.

% $Id: markpath.ps $
% markpath.ps
% Mark the corners of a path, drawing it slowly if desired.

/Delay where { pop } { /Delay 0 def } ifelse
/setxy0
 { currentpoint /y0 exch def /x0 exch def
 } def
/bip
 { epsx epsy idtransform /ey exch def /ex exch def
   currentpoint ex 2 div ey 2 div rlineto currentpoint 0 ey neg rlineto
   ex neg 0 rlineto 0 ey rlineto lineto lineto
   stroke
 } def
/dally
 { Delay { } repeat
   Delay 0 ne { flushpage } if
 } def
/movebip
 { /xs 2 index def /ys 1 index def
   gsave newpath mpmx transform moveto setxy0 bip grestore
 } def
/linebip
 { gsave newpath x0 y0 moveto mpmx transform lineto setxy0 bip dally grestore
 } def
/curvebip
 { gsave newpath x0 y0 moveto 5 index 5 index mpmx transform lineto bip
   2 copy mpmx transform moveto 3 index 3 index mpmx transform lineto bip
   x0 y0 moveto
   3 { mpmx transform 6 2 roll } repeat
   curveto setxy0 bip dally grestore
 } def
/closebip
 { xs ys linebip
 } def

/markpath		% <matrix> markpath -
 { /mpmx exch def 
   gsave initgraphics 9 dup dtransform grestore
     /epsy exch def   /epsx exch def
   gsave 0 setlinewidth
    { movebip } { linebip } { curvebip } { closebip } pathforall
   grestore
 } def