Re: [css3-2d-transforms][css3-3d-transforms] Handling of negative scaling vectors is not specified from Boris Zbarsky on 2010-09-09 (www-style@w3.org from September 2010)

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Wed, 08 Sep 2010 21:14:02 -0400
To: Sylvain Galineau <sylvaing@microsoft.com>
CC: "www-style@w3.org list" <www-style@w3.org>
Message-ID: <4C8834DA.8060906@mit.edu>

On 9/8/10 8:43 PM, Sylvain Galineau wrote:
> It seems WebKit and Firefox accept negative scaling vectors; both generate a reflected version of the content but with some differences.
>
> It'd be great to specify the desired behavior.

At least in 2d transforms, it's fully specified by reference to SVG, 
which defines scales entirely in terms of transformation matrices and 
clearly defines how points on the plane are to be represented as vectors 
and how the transformation matrices are to be applied to these vectors. 
  There's nothing magical about negative values as elements of the 
transformation matrices, and I'm curious about testcases where you see a 
difference between Gecko and Webkit.

3d transforms, as I said in my previous mail, don't define the 
processing model at all; I agree that they should do so.

-Boris

Received on Thursday, 9 September 2010 01:14:35 UTC