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Re: [css4-images] element() and compositing layers

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Fri, 27 Jul 2012 19:16:17 -0700
Message-ID: <CAAWBYDB7hrPe3Qj667BhmJjpMkzVdKuK0N59D9gy8k9S_43wbw@mail.gmail.com>
To: Simon Fraser <smfr@me.com>
Cc: www-style list <www-style@w3.org>
On Fri, Jul 27, 2012 at 6:32 PM, Simon Fraser <smfr@me.com> wrote:
> In WebKit at least, I think we'd have to do a software paint for element()
> content, so it doesn't really matter that parts are independently composited.
>
> This means that we would not render 3d transforms in element(), and
> video playback would perform poorly.

Yeah, James said this as well.  That seems pretty bad, so I was poking
at Moz's impl to see if we can do something better.

> Spec-wise, the more interesting issues are things like what happens if the target of the
> element() function is a split inline.

That's well-defined - you use the bounding box of the element.

~TJ
Received on Saturday, 28 July 2012 02:17:04 GMT

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