Bug 227284

Summary:	WKWebview / Safari - content pixelated in scrollable container when scaled using transform
Product:	WebKit	Reporter:	Akila <akila>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	simon.fraser
Priority:	P2
Version:	Safari 14
Hardware:	Mac (Intel)
OS:	macOS 11

Description Akila 2021-06-23 01:52:49 PDT

in the WKWebview /safari scaling a scrollable container results in a pixelated output the issue occurs when the container div uses ```overflow: auto;``` or ```overflow:scroll;```

scaling was working fine in macOS Catalina but broke with the OS update

here you can find a example of the issue https://codepen.io/thelastairbender/pen/bGqPEKY

are there any fix or a workaround for this issue, any idea would be great

Comment 1 Simon Fraser (smfr) 2021-06-24 20:33:25 PDT


*** This bug has been marked as a duplicate of bug 27684 ***

Comment 2 Akila 2021-06-24 22:24:45 PDT

this is not the duplicate of the bug 27684, in bug 27684 the issue is content is pixelated while scaling but settles own after scaling finish, but in this case content stays pixelated after scaling finishes

Comment 3 Simon Fraser (smfr) 2021-06-24 22:50:36 PDT

That's because the pixelation happens when the element is rendered into a composited layer. In bug 27684 that's temporary while the animation is running. Here, async scrolling logic means that it's permanent.

*** This bug has been marked as a duplicate of bug 27684 ***