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Re: [fxtf-drafts] [filter-effects-2] Backdrop filters should not use BackgroundImage (#53)

From: Amelia Bellamy-Royds via GitHub <sysbot+gh@w3.org>
Date: Mon, 25 Feb 2019 17:52:06 +0000
To: public-fxtf-archive@w3.org
Message-ID: <issue_comment.created-467110055-1551117125-sysbot+gh@w3.org>
Would it be possible to extend `isolation` to have a third value that means "don't isolate, even if this is a stacking context or other element that usually causes `auto` isolation".  This would be similar to how [`transform-style: preserve-3d`](https://drafts.csswg.org/css-transforms-2/#transform-style-property) works.

(Currently, `isolation` only has two values, `isolate` vs `auto`.)

This would address the authoring issue (authors often expect the backdrop filter to filter everything behind the element, but maybe they also expect isolation to limit it if they're using blending or opacity). But it could be more complicated for implementers, as they would need to implement both behaviors, both for backdrop filtering and for blend modes.

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Received on Monday, 25 February 2019 17:52:07 UTC

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