1492030 - invisible/flickering hackerone badge images

Status: RESOLVED FIXED

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

Description

[Darkspirit]

Debian Testing, GTX 1060

bad = invisible badge images which flicker and shine through when hovering them
mozregression --good 2018-07-01 --bad 2018-09-17 --pref gfx.webrender.all:true -a https://hackerone.com/melvin/badges
> 11:14.08 INFO: Last good revision: 57e362dbff454de4ae08dbeef0bb72d7cbf37e0b
> 11:14.08 INFO: First bad revision: 930e12a89a4371a2b62c9fef59d6be4eed21914e
> 11:14.08 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=57e362dbff454de4ae08dbeef0bb72d7cbf37e0b&tochange=930e12a89a4371a2b62c9fef59d6be4eed21914e

> 930e12a89a43	Jeff Muizelaar — Bug 1487588. Increase fuzz on 3d transform test a bit to avoid orange.
> d675059c7ee6	Jeff Muizelaar — Bug 1487588. Update webrender to commit 6415faa7f6acd412d4cc6b745cf802204690611c

Regression range: https://github.com/servo/webrender/compare/69dae1fe743bf3656d532672366e7193b041b6f7...6415faa7f6acd412d4cc6b745cf802204690611c
- probably regressed by servo/webrender#2997


"good" = no longer shining through, but still flickering
mozregression --find-fix --bad 2018-08-31 --good 2018-09-17 --pref gfx.webrender.all:true -a https://hackerone.com/melvin/badges
> 10:20.03 INFO: First good revision: f5063652dacb667a451348c37c983cf962eaf324
> 10:20.03 INFO: Last bad revision: 10b2b242b9bdf9daa261c66f269f622d51cb6a12
> 10:20.03 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=10b2b242b9bdf9daa261c66f269f622d51cb6a12&tochange=f5063652dacb667a451348c37c983cf962eaf324

> f5063652dacb	Jeff Muizelaar — Bug 1490640. Mark intermittent tests as random.
> 969f3b484bbb	Jeff Muizelaar — Bug 1490640. Update webrender to 70edb5f8a75ea1e1440ba7984cc42df9eb05ae69

https://github.com/servo/webrender/compare/02f14d0f333ef125d1abff7b1146039a0ba75f43...70edb5f8a75ea1e1440ba7984cc42df9eb05ae69
- probably improved by servo/webrender#3040

Comment 1

[Aria Beingessner [:Gankra]]

Almost certainly a dupe of either 

https://bugzilla.mozilla.org/show_bug.cgi?id=1454706

or

https://bugzilla.mozilla.org/show_bug.cgi?id=1491088

looks more like Z-fighting and therefore emoji-town to me

Comment 2

[Dzmitry Malyshau [:kvark]]

Indeed. I suggest we keep this open and re-test when the Z-fighting fix is ready.

Comment 3

[Dzmitry Malyshau [:kvark]]

eh, doesn't appear to be fixed by https://github.com/servo/webrender/pull/3104

Comment 4

[Dzmitry Malyshau [:kvark]]

This is fixed by https://github.com/servo/webrender/pull/3131, whenever it gets into Nightly.

Comment 5

[Dzmitry Malyshau [:kvark]]

Tested on 65.0a1 (2018-10-23) (64-bit), the corresponding WR fix is in now.