Bug 244103 – [Cocoa] Some AVIF images can't be rendered because their containers formats are HEIF

• Component: Images
• Status: RESOLVED FIXED

[Myles C. Maxfield]

From https://bugs.webkit.org/show_bug.cgi?id=241904#c4

> I find some avif image in base64 format still can't be render in Safari 16.Here is the image src link https://github.com/kamalendugarai/webp-avif-browsers-support-detection/blob/master/src/index.js#L11
> Browser version 18614.1.19.1.5
> This happened in both Mac OS 13 and iOS 16.

[Radar WebKit Bug Importer]

<rdar://problem/98850829>

[Myles C. Maxfield]

Looks like this is a bug in a system framework. Tracking in <rdar://problem/98850829>

[Said Abou-Hallawa]

*** Bug 244324 has been marked as a duplicate of this bug. ***

[Said Abou-Hallawa]

I think we can fix it (for now) by looking at the ftyp box of the HEIF/AVIF files and check the major_brand and the compatible_brands in this box.

HEIF/AVIF files start with an ftyp box

aligned(8) class GeneralTypeBox(code) extends Box(code) {
    unsigned int(32)    major_brand;
    unsigned int(32)    minor_version;
    unsigned int(32)    compatible_brands[];    // to end of the box
}

[Said Abou-Hallawa]

Pull request: https://github.com/WebKit/WebKit/pull/4434

[EWS]

Committed 254591@main (08227904ddb6): <https://commits.webkit.org/254591@main>

Reviewed commits have been landed. Closing PR #4434 and removing active labels.

[Said Abou-Hallawa]

*** Bug 245097 has been marked as a duplicate of this bug. ***

[Thierry]

I'm looking at https://tabpanelwidget.com in Safari Version 17.6 (19618.3.11.11.5) and all these AVIF images show blank:

https://tabpanelwidget.com/hero-home-page.1afc539c.avif

https://tabpanelwidget.com/[e-mail]

https://tabpanelwidget.com/[e-mail]

[Alexey Proskuryakov]

Thank you for bringing this up. This is a different issue, as these images are not HEIF in disguise. Please file a new bug report. Since these issues are typically in underlying system frameworks, it's best to file it at https://feedbackassistant.apple.com for Apple engineers to investigate, and to post the FB number here for tracking.

[Thierry]

FB Number: 16194197

https://feedbackassistant.apple.com/feedback/16194197