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Re: [fxtf-drafts] [filter-effects-1] feDropShadowElement definition does not match implementations (#343)

From: Connor Brewster via GitHub <sysbot+gh@w3.org>
Date: Fri, 14 Jun 2019 03:11:13 +0000
To: public-fxtf-archive@w3.org
Message-ID: <issue_comment.created-501951684-1560481872-sysbot+gh@w3.org>
This specifies that the filter primitive subregion can't ever be larger than the filter region:
> All intermediate offscreens are defined to not exceed the intersection of the filter primitive subregion with the filter region. The filter region and any of the filter primitive subregions are to be set up such that all offscreens are made big enough to accommodate any pixels which even partly intersect with either the filter region or the filter primitive subregions.

Also filter primitive inputs are supposed to be clipped by the filter region:
> The filter region acts as a hard clip clipping rectangle on the filter primitive’s input image(s).

If I am understanding this correctly, it seem like FireFox would be following the spec here.

Maybe the filter region could also be increased and the `feMerge` primitive could have a subregion that clips back to the original size?

GitHub Notification of comment by cbrewster
Please view or discuss this issue at https://github.com/w3c/fxtf-drafts/issues/343#issuecomment-501951684 using your GitHub account
Received on Friday, 14 June 2019 03:11:14 UTC

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