1849456 - Black line on a Codepen demo (https://codepen.io/daviddeejjames/pen/jvWGGj)

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Mayank Bansal]

Go to https://codepen.io/daviddeejjames/pen/jvWGGj
Hover mouse over the demon

AR: a black line appears between the two rows of the teeth
ER: not so

Regression :
Bug 1830588 - Fix clip on fractional composite prims r=gfx-reviewers,lsalzman

Also add a test and re-enable the new clip-mask code paths.

Surprisiblgy, a screen recording did not show that black line. Fortunately a screenshot captured it.

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

Attachment: bad_vs_good.png

Comment 3

[Mayank Bansal]

just realized that even Chrome shows a black line, though it is fainter than what Nightly shows. Recently chrome has deteriorated in rendering 3d css and pinch-zoom performance, and show these kind of artifacts.

Comment 4

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

Set release status flags based on info from the regressing bug 1830588

Comment 5

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

:gw, since you are the author of the regressor, bug 1830588, could you take a look?

For more information, please visit BugBot documentation.

Comment 6

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

Set release status flags based on info from the regressing bug 1830588

Comment 7

[Mayank Bansal]

Fixed by bug 1851508.