1470133 - Part of bounding rect isn't painted correctly

Status: RESOLVED DUPLICATE of bug 1423087

(Core :: Graphics: WebRender, defect, P2)

Description

[Kartikaya Gupta (email:[e-mail])]

Attachment: clock.png

Follow-up from bug 1463802.

STR:
- Enable WR in macOS nightly. Ensure the browser sidebar is off
- Go to http://sinz.org/Clock/

Expected: Clock renders correctly
Actual: Clock has a white area in the bottom-left corner that shouldn't be there.

Comment 1

[Kartikaya Gupta (email:[e-mail])]

Attachment: Reduced test case

Here's a pretty minimal page that reproduces the problem for me. I'll attach a video of the really bizarre behaviour in a sec.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Attachment: Video of strange behaviour

Comment 3

[Kartikaya Gupta (email:[e-mail])]

Attachment: about:support from affected machine

Since emilio wasn't seeing this behaviour on his mac (per bug 1463802 comment 8) it might be hardware-specific. I'm attaching my about:support

Comment 4

[Kartikaya Gupta (email:[e-mail])]

Attachment: Video of more strange behavior

I see similar behaviour on https://bugzilla.mozilla.org/attachment.cgi?id=8975631 - video attached

Comment 5

[Jeff Muizelaar [:jrmuizel]]

I don't see this on Windows.

Comment 6

[Darkspirit]

This might have been fixed by https://github.com/servo/webrender/pull/2864 (bug 1423087).

Comment 7

[Darkspirit]

(In reply to Kartikaya Gupta (email:[e-mail]) (parental leave) from comment #3)
> Created attachment 8986761 [details]
> about:support from affected machine

> WebGL 2 Driver Renderer: Intel Inc. -- Intel(R) Iris(TM) Graphics 650

Yeah, this should be a dupe of bug 1423087. Can you confirm?

Comment 8

[Kartikaya Gupta (email:[e-mail])]

Confirmed. Thanks!