Bug 277794

Summary:

WKWebview does not render AVIF images on macOS in "designed for iPad" iOS apps

Product:

WebKit

Reporter:

Martin Knudsen <martin.knudsen>

Component:

Images

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

ap, pvollan, sabouhallawa, simon.fraser, thorton, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 17

Hardware:

Mac (Apple Silicon)

OS:

macOS 14

Attachments:

Description	Flags
WKWebView in an app not rendering AVIF images	none
UIWebView in app rendering AVIF images successfully	none

Martin Knudsen

Reported 2024-08-08 01:59:24 PDT

Created attachment 472076 [details] WKWebView in an app not rendering AVIF images If I run any WKWebKit based iOS app on my silicon mac it fails to render AVIF images consistently. This can be reproduced with test apps in the mac app store like https://apps.apple.com/de/app/webview-wkwebview-and-uiwebview-rendering/id928647773?l=en-GB WKWebView does not render AVIF images. UIWebView does appear to render them. Software versions: macOS 14.6 (23G80) Safari Version 17.6 (19618.3.11.11.5) Steps to reproduce: - load a WKWebView using app like https://apps.apple.com/de/app/webview-wkwebview-and-uiwebview-rendering/id928647773?l=en-GB on an Apple Silicon mac - select WKWebView - enter https://www.otto.de/apps-assets/images.html (or any other AVIF displaying website like https://test-images.github.io/avif/202105/squoosh/losssless7/ ) as the URL to load - press go result: - AVIF images do not render correctly, JPEG image renders correctly expected: - AVIF images to be displayed the same as on UIWebView Selecting UIWebView shows images as expected. I cannot reproduce this with either mobile Safari on iOS or (stable, preview) Desktop Safari on my Mac itself so it seems specific to iOS apps being run on mac OS. I also filed issues through the Apple feedback assistant, IDs FB14711263 and FB14678252 . Let me know if I can add any more information.

Attachments
WKWebView in an app not rendering AVIF images (114.16 KB, image/png) 2024-08-08 01:59 PDT, Martin Knudsen	no flags	Details
UIWebView in app rendering AVIF images successfully (243.35 KB, image/png) 2024-08-08 02:00 PDT, Martin Knudsen	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Martin Knudsen

Comment 1 2024-08-08 02:00:23 PDT

Created attachment 472077 [details] UIWebView in app rendering AVIF images successfully

Alexey Proskuryakov

Comment 2 2024-08-09 17:41:24 PDT

rdar://133272264

Martin Knudsen

Comment 3 2024-09-04 03:23:37 PDT

The test app I mentioned seems removed from the app store, this one demonstrates the issue as well.

Martin Knudsen

Comment 4 2024-09-17 04:19:45 PDT

This issue seems fixed with macOS 15.0 (24A335), will verify with 14.7 too.

Martin Knudsen

Comment 5 2024-09-17 04:49:10 PDT

Still broken 14.7 (23H124) and Safari Version 18.0 (19619.1.26.111.10, 19619). Sequoia / 15 looks good though.

Per Arne Vollan

Comment 6 2024-09-18 09:21:40 PDT

rdar://108458357

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