1961378 - backdrop-filter gets ignored if it would fall back to a blob image (such like with some SVG url filters).

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Christopher Kirk-Nielsen]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

Steps to reproduce:

1. Created a page with a popover trigger via a button
2. Set the ::backdrop styles to have a backdrop-filter, based on an SVG filter passed via url("data:text/xml+svg,...#filter")
3. Click the button to open the popover and reveal the backdrop
4. Applying the exact same value to a regular filter property works, as demonstrated in the popover content (an emoji has the effect applied)

Demo: https://codepen.io/chriskirknielsen/pen/PwwwvMX
Notes: this works in Chrome, and using a non-URL-based filter such as blur(10px) works as expected.

Actual results:

The backdrop-filter is not applied for SVG filter URLs

Expected results:

The backdrop-filter should apply for SVG filter URLs

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: WebRender' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:gw, could you have a look please?

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