1749950 - 3D animation SVG broken with Webrender

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Alice0775 White]

This is from Bug 1662766

Steps to reproduce:

1. Open https://andyjakubowski.com/

Actual results:
Small objects, such as planets, are often squares instead of circles.
The ellipse arc of a planet's orbit is sometimes rendered as a broken line.

Expected results:
The small objects should be always circle.
The ellipse arc should be not broken.
See screenshot: https://youtu.be/hiFr6_ZGn2M

This bug has been happening since WebRender was enabled.

Disabling WebRender in Firefox 91.0.5esr solves the problem.

Comment 1

[Andy Jakubowski]

(In reply to Alice0775 White from comment #0)

This is from Bug 1662766

Steps to reproduce:

1. Open https://andyjakubowski.com/

Thanks for filing this, Alice!

I moved the site that features the bug to a subdomain.

So, to reproduce:

1. Open https://freelance.andyjakubowski.com

Comment 2

[Bob Hood [:bhood]]

Nical, can you provide some insight on this?

Comment 3

[Nicolas Silva [:nical]]

Attachment: wr-capture.zip

Here is a wrench capture of a frame that has the issue.

Interestingly, if I remove frame-0-1.ron to force re-rendering the recording, then the glitch is gone. Perhaps that suggests an invalidation issue with picture cache tiles.

Glenn what do you think?

Comment 4

[Glenn Watson [:gw]]

That does seem possible, yes - I checked quickly on current nightly and it seems a bit better (the circle seems to look correct). If I set gfx.webrender.debug.force-picture-invalidation then that seems to fix the remaining glitches for me. Can anyone else confirm?

Comment 5

[Gregory Pappas [:gregp]]

Setting gfx.webrender.debug.force-picture-invalidation to true in Firefox Nightly (Build 20220327093354) makes the animation run perfectly on my machine, all glitches have gone away.