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Re: [fxtf-drafts] [filters] Backdrop filters should not use BackgroundImage

From: Markus Stange via GitHub <sysbot+gh@w3.org>
Date: Mon, 23 Apr 2018 21:35:02 +0000
To: public-fxtf-archive@w3.org
Message-ID: <issue_comment.created-383730808-1524519301-sysbot+gh@w3.org>
@grorg This issue definitely needs clarification before we can agree to implementing backdrop-filter in Firefox.

In particular, it needs to be clear how the testcase in https://github.com/w3c/fxtf-drafts/issues/53#issuecomment-250811306 should behave.

There are strong parallels to `mix-blend-mode` here: If you have an element with `mix-blend-mode`, blending needs to happen between that element's contents and the element's backdrop. We have an existing definition for what exactly the `mix-blend-mode` backdrop is, and that definition respects isolation. If `backdrop-filter` ends up using a different definition for what the backdrop is, there should be a good justification for the difference.

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Please view or discuss this issue at https://github.com/w3c/fxtf-drafts/issues/53#issuecomment-383730808 using your GitHub account
Received on Monday, 23 April 2018 21:35:04 UTC

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