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

The most common argument we've heard against making backdrop-filter respect stacking context isolation boundaries is that it is too restrictive. Particularly when the stacking context is created by an operation that shouldn't cause any real problems for backdrop-filter, such as 2D transforms and fixed position elements. These are definitely valid points. We still believe (strongly) that there are fundamental problems with having backdrop-filter "see" above an element with effects applied, however. To attempt to relax some of the constraints of stacking contexts, while still retaining the needed boundaries for effects, we have defined a new concept, which we're very tentatively calling the Backdrop Root. [Please see this document](https://docs.google.com/document/d/1D302HscLmYW-WE2u5DpYSB9RwLau9nfpockl_wmKWRA) for a detailed explanation of both the solution and the problem, as we see it. Comments are very welcome - this is a draft idea.


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Received on Friday, 4 January 2019 23:30:40 UTC