1455839 - Web content painted on Chrome

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P1)

Description

[TMart]

Attachment: Screenshot

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Build ID: 20180420220029

Steps to reproduce:

-Opened http://www.faz.net/aktuell/wissen/erde-klima/der-planet-steht-das-system-wankt-der-klimawandel-zeigt-sich-radikaler-denn-je-15545724.html 

-Scrolled down


Actual results:

The picture on the top of the article gets sometimes painted on the Chrome.

Comment 1

[Darkspirit]

Attachment: Screenshot_20180421_141904.png

Nightly 61 x64 20180420220029 de_DE @ Debian Testing (KDE, Radeon RX480)
If I hover over the picture, it gets larger and has a frame around it which shouldn't exist and which can get drawn on chrome.

Comment 2

[Darkspirit]

mozregression --good 2018-02-15 --bad 2018-04-20 --pref gfx.webrender.all:true privacy.trackingprotection.enabled:true startup.homepage_welcome_url:"http://www.faz.net/aktuell/wissen/erde-klima/der-planet-steht-das-system-wankt-der-klimawandel-zeigt-sich-radikaler-denn-je-15545724.html"
> 10:08.25 INFO: Last good revision: 0e1ed4c7224223059730320c6de910947337c216
> 10:08.25 INFO: First bad revision: 751d00a65e68ad9075071de8bd72e37488c398ea
> 10:08.25 INFO: Pushlog:
> https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=0e1ed4c7224223059730320c6de910947337c216&tochange=751d00a65e68ad9075071de8bd72e37488c398ea

2018-02-16
> 751d00a65e68	Kartikaya Gupta — Bug 1437572 - Update reftest fuzziness from WR PR 2408. r=jrmuizel
> 37d984fce90f	Kartikaya Gupta — Bug 1437572 - Update webrender to 4af31b8aa79d5a1f3c0242dea6be4876c71075c5. r=jrmuizel

Regression range: https://github.com/servo/webrender/compare/342bc314db94aa439b2001249c5f24ccfcbccc22...4af31b8aa79d5a1f3c0242dea6be4876c71075c5

Comment 3

[Darkspirit]

This may be a duplicate of bug 1447093. Others should assess that. :)

Comment 4

[Aria Beingessner [:Gankra]]

Attachment: testcase.html

Doesn't look like it's a dupe. Seems to be a bad interaction with:

* border-radius on an image
* that's transformed (scale + rotate seems to be especially effective, but each individually is sufficient)
* and contained in an overflow:hidden

~minimal test-case attached

Comment 5

[Aria Beingessner [:Gankra]]

Attachment: testcase-better.html

Ah, the image wasn't necessary at all. Should be very easy to write a wr test then.

Comment 6

[Aria Beingessner [:Gankra]]

Martin fixed this in https://github.com/servo/webrender/pull/2707