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Re: [CSS4 color][CSS4 transition] color pre-multiplied vs non pre-multiplied was (Re: [CSSWG] Minutes TPAC Tue 2012-10-30 AM I: Abstract Directions, Transforms, Transitions)

From: Dirk Schulze <dschulze@adobe.com>
Date: Tue, 26 Feb 2013 15:47:14 -0800
To: "Tab Atkins Jr." <jackalmage@gmail.com>
CC: Rik Cabanier <cabanier@gmail.com>, "www-style@w3.org" <www-style@w3.org>
Message-ID: <FDAB320B-77F8-4923-B40F-6C357CDF6CAB@adobe.com>

On Feb 26, 2013, at 2:12 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:

> On Tue, Feb 26, 2013 at 2:05 PM, Rik Cabanier <cabanier@gmail.com> wrote:
>> I would like to follow up on this.
>> The spec currently states that colors need to be premultiplied but only IE
>> implements it that way.
>> Can we fix the spec to not make gradients premultiplied and instead special
>> case the 'transparent' keyword?
> Our intention is still to keep it premultiplied.  Some impls are slow
> to update to it, but they intend to switch over.

As long as it is possible for them. Reading some previous mails on this thread I got the impression that it isn't for some. See Simon's mail:

We rely on Core Graphics to render gradients on Mac, and that can't do pre-multiplied.

The intention to do something is not enough sometimes.


> ~TJ
Received on Tuesday, 26 February 2013 23:47:43 UTC

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