[csswg-drafts] [css-overflow-3] Specify extent of ink overflow (#8649)

chrishtr has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-overflow-3] Specify extent of ink overflow ==
The spec [defines ink overflow](https://drafts.csswg.org/css-overflow-3/#ink), but does not specify the extent of it, because some effects in CSS, such as blur radius or box shadow radius, are theoretically infinite.

However, issues such as #8597 and w3c/IntersectionObserver#295 are good reasons to define it, for the purpose of knowing the size of an animated image of a DOM subtree for the purpose of creating a bitmap image, or occlusion testing.

I think we can define it in cases of blur or box shadow in a reasonable way, such as defining the ink overflow to go out to a certain [specified standard deviation](https://w3c.github.io/csswg-drafts/css-backgrounds/#shadow-blur) on its Gaussian shape.

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/8649 using your GitHub account


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Received on Monday, 27 March 2023 22:46:39 UTC