Bug 239688 - REGRESSION (iOS 15.4): ColorizePhoto.com doesn't work
Summary: REGRESSION (iOS 15.4): ColorizePhoto.com doesn't work
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: Safari 15
Hardware: iPhone / iPad iOS 15
: P2 Major
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks: anglemetalregr
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Reported: 2022-04-23 00:03 PDT by nkronlage
Modified: 2022-05-23 03:44 PDT (History)
4 users (show)

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Description nkronlage 2022-04-23 00:03:00 PDT 
A recent regression in iOS 15.4 causes https://www.colorizephoto.com/ to stop working, affecting many site users. Disabling WebGL via Metal restores functionality to the site.

Repro:
Ensure 'WebGL via Metal' enabled: Settings App -> Safari -> Advanced -> Experimental Features -> Turn on 'WebGL via Metal'
In Safari, go to https://www.colorizephoto.com/converter
Try painting on Clint Eastwood's face

Expected:
The black/white photo should have skin color where you paint

Actual:
Nothing happens - no coloring of the black/white photo

Try again after turning off 'WebGL via Metal' to see the correct behavior
Comment 1 Radar WebKit Bug Importer 2022-04-24 13:02:57 PDT 
<rdar://problem/92238140>
Comment 2 Kimmo Kinnunen 2022-05-23 03:44:09 PDT 
Still repros on iOS. Unclear if bug 240790 is the root cause