1975122 - SVG gradient artifacts

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[iofelben]

Attachment: bug.mp4

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Steps to reproduce:

1. visit https://fly.io
2. hover over Articles in the navbar, and move your mouse around

Actual results:

I see various artifacts (lines where the gradient is messed up).

Expected results:

Nothing should have happened. (e.g. nothing happens in safari)

Comment 1

[BugBot [:suhaib / :marco]]

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

[Mayank Bansal]

gradient or shadows.

Comment 3

[Alice0775 White]

Regression window:
https://hg-edge.mozilla.org/integration/autoland/pushloghtml?fromchange=892e1da580c2b224927a946be16366c515ef4899&tochange=d15590887b1f090d45bf0e40e2dbc3e82ef81ebc

Comment 4

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1955697

:emilio, since you are the author of the regressor, bug 1955697, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 5

[Emilio Cobos Álvarez [:emilio]]

This reproduces before my patch if I add :root { background-color: white } to trigger the optimization that I started doing in https://hg-edge.mozilla.org/integration/autoland/rev/4d2ee9dc112f9640f43e4c670759aa86b5030b2a more frequently.

So it's a graphics issue really.

Comment 6

[Emilio Cobos Álvarez [:emilio]]

Attachment: Reduced-ish test-case.

Comment 7

[Emilio Cobos Álvarez [:emilio]]

Attachment: Reduced-ish test-case that reproduces before my patch.

Comment 8

[Emilio Cobos Álvarez [:emilio]]

With comment 7 I get: https://hg-edge.mozilla.org/mozilla-central/pushloghtml?fromchange=197242dda0b4aa2dc8668d35ec85e48d59831687&tochange=22bab7a24384ad860900ddccc70b2e64f8ba35fc

I'm going to bet from that list bug 1896503 is the real root cause, specially since gfx.webrender.svg-filter-effects=false fixes the website too.

Comment 9

[Ashley Hale [:ahale]]

I'll take a look, it does resemble invalidation issues with the SVGFE code path so I agree it's probably that.

Comment 10

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1896503