Bug 251754

Summary:

Weird temporarily artifacts on over scrolling

Product:

WebKit

Reporter:

Ebrahim Byagowi <ebrahim>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED CONFIGURATION CHANGED

Severity:

Normal

CC:

bfulgham, mmaxfield, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
weird temporarily artifacts	none
Artifacts	none
resize and scroll	none

Ebrahim Byagowi

Reported 2023-02-05 02:59:37 PST

Created attachment 464848 [details] weird temporarily artifacts Happens in both WebKit (6c4c9810) and Safari 16.2, 1. Open https://codepen.io/jh3y/pen/VwBgPxP 2. Scroll down and up, fast and slowly, like what is shown in the attachment. Actual: Weird artifacts will be seen sometimes specially when top overscroll happens. Expected: Like Chrome and Firefox I saw this codepen from this tweet, https://twitter.com/jh3yy/status/1621564942175322112

Attachments
weird temporarily artifacts (2.57 MB, video/quicktime) 2023-02-05 02:59 PST, Ebrahim Byagowi	no flags	Details
Artifacts (1.08 MB, video/quicktime) 2023-02-05 03:48 PST, Ebrahim Byagowi	no flags	Details
resize and scroll (9.20 MB, video/quicktime) 2023-02-05 07:02 PST, zalan	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Ebrahim Byagowi

Comment 1 2023-02-05 03:48:07 PST

Created attachment 464849 [details] Artifacts Something similar also happen while scrolling of https://meodai.github.io/poline/ only in Safari and not Chrome and Firefox on an M1 MacBook Pro.

zalan

Comment 2 2023-02-05 07:02:16 PST

Created attachment 464851 [details] resize and scroll I wasn't able to reproduce it but resizing the content frame makes the gallery move off center while it jumps right back soon after I star scrolling -(which looks very similar to what the attached "artifact" recording shows with the misplaced content). Firefox seems to always center the content.

Radar WebKit Bug Importer

Comment 3 2023-02-05 08:55:58 PST

<rdar://problem/105058470>

Ebrahim Byagowi

Comment 4 2024-09-20 00:36:42 PDT

I no longer see much an issue here. Guess some driver or graphic layer fixes has happened which is great. Thanks

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