drawing zero-length line as last line of path causes entire path not to render

[GoogleCodeExporter]

If you draw a number of lines using moveTo() and lineTo() followed by a 
zero-length line (e.g. 
moveTo(20, 30); lineTo(20, 30);), when stroke() and closePath() are called, the 
path will not display.  
If the command to draw this zero-length line is not the last line you draw 
before calling closePath(), 
the path displays as expected.

Attached is a test case.  It draws a picture of an equals sign (=) putting the 
line-drawing commands 
in different orders.  The first canvas draws the top line, then a zero-length 
line, then the bottom line  
The second canvas draws the top line, then the bottom line, and then a 
zero-length line.  In a 
browser using its native canvas implementation (tested in Chrome and Firefox on 
Mac OS X), they 
display identically; in IE (tested on 6, 7, and 8 in Windows XP) the second 
does not display at all.

Behavior is the same for current explorercanvas release (release 3) as well as 
current SVN trunk 
(r73).

The attached test case expects to be opened in a directory containing 
excanvas.js.  In a canvas-
enabled browser you should see two boxes with red equals signs in them; in 
excanvas-enabled IE 
you will see two boxes, one with a red equals sign and one that is empty.

Original issue reported on code.google.com by hyn...@gmail.com on 25 Apr 2010 at 9:42

Attachments:

• test.html