Bug 237006

Summary:

REGRESSION (iOS 15.4): Repaint issues with BabylonJS

Product:

WebKit

Reporter:

MattT <matt>

Component:

WebGL

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Major

CC:

bfulgham, dino, geofflang, gman, johncunningham, jonahr, kbr, kkinnunen, kpiddington, mvaligursky, roberto.ranon, tomac, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 15

Hardware:

iPhone / iPad

OS:

iOS 15

See Also:

https://bugs.webkit.org/show_bug.cgi?id=235746

Bug Depends on:

238196

Bug Blocks:

Attachments:

Description	Flags
A video of the bug happening	none

MattT

Reported 2022-02-21 16:40:51 PST

Created attachment 452797 [details] A video of the bug happening This BabylonJS playground and others work fine on iOS 15.3: https://playground.babylonjs.com/#RLBZPF On iOS 15.4 beta 3+, drag the camera around with touch and the problem will become clear with the screen drawing over itself several times. The Babylon team says everything seems fine in the gl stack. Attached is a video of the bug.

Attachments
A video of the bug happening (7.90 MB, video/quicktime) 2022-02-21 16:40 PST, MattT	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2022-02-22 12:52:15 PST

<rdar://problem/89311294>

Kenneth Russell

Comment 2 2022-02-22 15:00:53 PST

I wonder whether this might be fixed with the ANGLE roll forthcoming in Bug 235746. Several issues have been fixed upstream in resolving of multisampled renderbuffers to textures.

MattT

Comment 3 2022-03-05 21:00:05 PST

(In reply to Kenneth Russell from comment #2) > I wonder whether this might be fixed with the ANGLE roll forthcoming in Bug > 235746. Several issues have been fixed upstream in resolving of multisampled > renderbuffers to textures. Still happening in beta5.. not sure if this change you mentioned is in there yet.

Roberto Ranon

Comment 4 2022-03-16 07:22:54 PDT

I see a similar problem on three.js v128, on both iOS 15.4, iPad OS 15.4, and macOS 12.3 (on M1 Mac). These problems were not three in previous os versions. Can provide steps to reproduce: also, the problem is with gltf models with transmission, i.e. that require the renderer to render to multi-sampled texture.

MattT

Comment 5 2022-03-16 10:02:50 PDT

The bug reports are beginning to flood in various Babylon features broken in 15.4. Thousands of devs rely on this library for commercial projects, would be good to fix ASAP :/

Martin

Comment 6 2022-03-17 07:22:28 PDT

likely related https://bugs.webkit.org/show_bug.cgi?id=238022

Kenneth Russell

Comment 7 2022-03-19 21:44:21 PDT

On an M1 MacBook Pro and Safari Technology Preview Release 141 (Safari 15.4, WebKit 17614.1.3.8), with "WebGL via Metal" turned on, this example renders correctly. Perhaps this configuration isn't reproducing the same problem seen on iOS. It also renders correctly on Chrome Canary 102.0.4952.2 (Official Build) canary (arm64) with --use-angle=metal.

Kimmo Kinnunen

Comment 8 2022-03-22 02:45:30 PDT

Thanks for the report. Even though Ken reports no repro on his side, I'll start this with the assumption this is related to the 15.4 msaa regression, linked to in the depends on -section.

Dean Jackson

Comment 9 2022-03-28 17:45:01 PDT

Confirmed this is fixed in https://bugs.webkit.org/show_bug.cgi?id=238171

Brent Fulgham

Comment 10 2022-05-26 15:02:33 PDT

This fix shipped with Safari 15.5 (all platforms).

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