%!%    Copyright (C) 1994 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: zeroline.ps,v 1.1 2000/03/09 08:40:40 lpd Exp $% zeroline.ps% Test file to determine how other PostScript implementations handle% filling zero-width lines under a variety of conditions. % Add a small "fan" of zero-width lines at different angles to the path./fan { currentpoint 100 0 rlineto   2 copy moveto 100 20 rlineto   2 copy moveto 100 100 rlineto   2 copy moveto 20 100 rlineto   moveto 0 100 rlineto } def % Append a rectangle to the current path./rectappend { 4 -2 roll moveto 1 index 0 rlineto 0 exch rlineto   neg 0 rlineto closepath } def% Fill a rectangle./rectfill { gsave newpath rectappend fill grestore } def% Stroke a rectangle./rectstroke { gsave newpath rectappend stroke grestore } def% Clip to a rectangle.  Unlike the real rectclip,% this clear the current path./rectclip { newpath rectappend clip newpath } def 40 40 translate % Display fans of different colors on different backgrounds.gsave0 setgray0 0 120 120 rectstroke10 10 moveto fan fill140 0 translate0 setgray0 0 120 120 rectstroke0.8 setgray10 10 moveto fan fill140 0 translate0 setgray0 0 120 120 rectfill1 setgray10 10 moveto fan fillgrestore0 140 translate % Display rectangles with two edges coincident.gsavenewpath0 setgray0 0 40 40 rectappend0 0 20 20 rectappendeofill60 0 translate0 0 40 40 rectappend40 0 -20 20 rectappendfillgrestore0 60 translate % Display superimposed lines.gsave/super { currentpoint fan   2 copy moveto 20 0 rmoveto 50 0 rlineto   2 copy moveto 20 4 rmoveto 50 10 rlineto   2 copy moveto 20 20 rmoveto 50 50 rlineto   2 copy moveto 4 20 rmoveto 10 50 rlineto   moveto 0 20 rmoveto 0 50 rlineto } def0 setgray0 0 moveto super fill140 0 translate 0 0 moveto super eofillgrestore0 140 translate showpage