1470905 - Car driving surface is missing on specific page

Status: RESOLVED FIXED

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

Description

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

Spinoff from bug 1420754. On https://old.reddit.com/r/dankmemes/ the surface that the car is driving on (at the top of the page) is missing with WR.

I suspect this is a perspective transform bug, similar to bug 1415272. But that's just a guess.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

Attachment: Reduced test case

Here's a mostly reduced test case

Comment 2

[Darkspirit]

Reddit is fixed, but the testcase flickers a bit at the top (it was completely invisible before).

Comment 3

[Darkspirit]

Debian Testing, KDE, Xorg, Nvidia GTX 1060, driver 390.77

Testcase behavior changes:

"good" = flickers at the top
"bad" = only the left side flickers
mozregression --good 2018-08-10 --bad 2018-08-31 --pref gfx.webrender.all:true -a https://bug1470905.bmoattachments.org/attachment.cgi?id=8993055
> 10:48.55 INFO: Last good revision: c09a146819d3a65127cee966b326efa9ee8ea4aa
> 10:48.55 INFO: First bad revision: 9b2aa473b2a807dfd412889ebc31aa62dac67339
> 10:48.55 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c09a146819d3a65127cee966b326efa9ee8ea4aa&tochange=9b2aa473b2a807dfd412889ebc31aa62dac67339

> 5cfe12075897	Jeff Muizelaar — Bug 1485791. Update webrender to commit 816ff14c1805c145ccd60d0227d82b1541fc24eb

https://github.com/servo/webrender/compare/93997662842b6d8bafbdb3dde79009c930db66ca...816ff14c1805c145ccd60d0227d82b1541fc24eb

----

"good" = only the left side flickers
"bad" = some parts of the left and top are being gradually hidden
mozregression --good 2018-08-27 --bad 2018-08-31 --pref gfx.webrender.all:true -a https://bug1470905.bmoattachments.org/attachment.cgi?id=8993055
> 5:19.72 INFO: Last good revision: 43b1ea339d12e26266d7946b74eb0a7304157aa6
> 5:19.72 INFO: First bad revision: 82efdb13962c299f4501c9f4ee3a4608a4fef85a
> 5:19.72 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=43b1ea339d12e26266d7946b74eb0a7304157aa6&tochange=82efdb13962c299f4501c9f4ee3a4608a4fef85a

> 595a9385a0b0	Jeff Muizelaar — Bug 1487429. Update webrender to 69dae1fe743bf3656d532672366e7193b041b6f7

https://github.com/servo/webrender/compare/5fa5c46e167ca834d8fec3bf662bf420418698f4...69dae1fe743bf3656d532672366e7193b041b6f7

Comment 4

[Maire Reavy [:mreavy]]

We can't release this to the field, but we can let this ride to beta.

Comment 5

[Glenn Watson [:gw]]

This appears to be fixed by the changes in https://github.com/servo/webrender/pull/3030