%! % Copyright (C) 2001-2021 Artifex Software, Inc. % All Rights Reserved. % % This software is provided AS-IS with no warranty, either express or % implied. % % This software is distributed under license and may not be copied, % modified or distributed except as expressly authorized under the terms % of the license contained in the file LICENSE in this distribution. % % Refer to licensing information at http://www.artifex.com or contact % Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, % CA 94945, U.S.A., +1(415)492-9861, for further information. % % 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. gsave 0 setgray 0 0 120 120 rectstroke 10 10 moveto fan fill 140 0 translate 0 setgray 0 0 120 120 rectstroke 0.8 setgray 10 10 moveto fan fill 140 0 translate 0 setgray 0 0 120 120 rectfill 1 setgray 10 10 moveto fan fill grestore 0 140 translate % Display rectangles with two edges coincident. gsave newpath 0 setgray 0 0 40 40 rectappend 0 0 20 20 rectappend eofill 60 0 translate 0 0 40 40 rectappend 40 0 -20 20 rectappend fill grestore 0 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 } def 0 setgray 0 0 moveto super fill 140 0 translate 0 0 moveto super eofill grestore 0 140 translate showpage