- From: Ian Hickson <ian@hixie.ch>
- Date: Tue, 23 Jul 2013 21:11:10 +0000 (UTC)
- To: Dirk Schulze <dschulze@adobe.com>
- Cc: WHATWG List <whatwg@whatwg.org>
On Mon, 22 Jul 2013, Dirk Schulze wrote: > > > > scale(0) is invalid, and should throw an exception. > > I don't think that we want to throw an exception on scale(0). No browser > does that today. WebKit did it in some places in the past but removed > the exceptions. WebIDL says it should throw a TypeError, because it's missing an argument. (Step 4 of the overload resolution algorithm). Firefox, Chrome, and Safari all seem to do this. > >> The second does setTransform(0,0,0,0,0,0), which should reset the CTM > >> to a zero matrix (again, not invertible). IE, Opera and FF draw a > >> line to 0,0 and close the path afterwards (which kind of makes sense, > >> since the universe is convoluted to one point). WebKit refuses the > >> lineTo command and closes the path as expected. > > > > WebKit seems to just be wrong here, and the others right. > > Since this is not written in the spec As far as I can tell, it _is_ written in the spec. scale(0,0) would reduce all coordinates and lines and so forth to 0,0. That's what the spec requires. I don't see the problem here. -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 23 July 2013 21:11:34 UTC