[whatwg] Canvas gradients color interpolation - change to premultiplied? from Boris Zbarsky on 2010-11-27 (public-whatwg-archive@w3.org from November 2010)

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Fri, 26 Nov 2010 23:44:50 -0500
Message-ID: <4CF08CC2.4000409@mit.edu>

On 11/26/10 11:39 PM, Simon Fraser wrote:
>> But CSS gradients are already requiring interpolation in premutiplied space, right?
>
> I think you're thinking of CSS Transitions, which we decided should run in premultiplied.

No.  http://dev.w3.org/csswg/css3-images/#color-stop-syntax currently says:

   Between two color-stops, the line's color is linearly interpolated
   between the colors of the two color-stops, with the interpolation
   taking place in premultiplied RGBA space.

and there was related discussion on www-style, iirc.

-Boris

Received on Friday, 26 November 2010 20:44:50 UTC