Bug 200334

Summary:

[Async overflow scrolling] overflow:hidden fails to clip transformed descendant inside overflow:scroll

Product:

WebKit

Reporter:

Simon Fraser (smfr) <simon.fraser>

Component:

Compositing

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

Hironori.Fujii, simon.fraser, the.bull, vincentriemer

Priority:

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Testcase	none

Simon Fraser (smfr)

Reported 2019-07-31 21:35:10 PDT

Created attachment 375291 [details] Testcase Testcase shows a bug where the overflow:hidden fails to clip.

Attachments
Testcase (1.43 KB, text/html) 2019-07-31 21:35 PDT, Simon Fraser (smfr)	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Simon Fraser (smfr)

Comment 1 2019-07-31 21:38:26 PDT

Looks like a combination of backing-sharing, transforms and overflow:hidden.

Fujii Hironori

Comment 2 2022-07-14 20:37:43 PDT

This is an Async Overflow Scrolling issue. Mac WK1, AppleWin and WinCairo don't have this issue because they don't use Async Overflow Scrolling. Disabling Async Overflow Scrolling Internal Feature setting of MiniBrowser can work around the issue.

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