W3C home > Mailing lists > Public > www-style@w3.org > May 2011

RE: [css3-images] Composing generated images

From: Brian Manthos <brianman@microsoft.com>
Date: Tue, 24 May 2011 22:38:30 +0000
To: Tab Atkins Jr. <jackalmage@gmail.com>
CC: www-style list <www-style@w3.org>
Message-ID: <FA122FEC823D524CB516E4E0374D9DCF1FAFC58A@TK5EX14MBXC136.redmond.corp.microsoft.com>
>> With and without your proposal, what's the expected behavior for
>> transitions of background-image when the to and from both contain cross-
>> fade?

> Sigh, I had something like this tickling my brain, but I ignored it.
> Yeah, transitioning a cross-fade() image produces a nested cross-fade(), so
> there's no way to disallow it.  Never mind, then!

Still curious on the answer to the "without your proposal" half of my question.

(1) Is it supported?
(2) If yes to (1), what should the user experience be?
(2b) Should the intermediate frames be rendered "as if" the cross-fade from the to and from endpoints was rasterized and then cross-fade between the two?
(3) If yes to 2b, does this rasterization approach apply for SVG images as well?
(4) If yes to (3), does this indirectly end up defining what an SVG to/from PNG transition should look like?
(5) If yes to (3), this should be very interesting for (a) multiple-resolutions-in-a-single-file and (b) for no-intrinsic-dimensions-in-the-specific-format.
(6) If yes to (3) and (5b) is covered richly in the spec, then I think { CSS Gradient -> SVG -> PNG -> ICO } interpolations all the sudden become well defined.

- Brian
Received on Tuesday, 24 May 2011 22:39:00 UTC

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