Bug 245669

Summary: 10bit AVIF images with an alpha channel won't render
Product: WebKit Reporter: buzz_thrill_0z
Component: ImagesAssignee: Nobody <webkit-unassigned>
Status: RESOLVED MOVED    
Severity: Normal CC: bfulgham, greg323464, mmaxfield, sabouhallawa, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari 16   
Hardware: All   
OS: iOS 16   
See Also: https://bugs.webkit.org/show_bug.cgi?id=245858
https://bugs.webkit.org/show_bug.cgi?id=228739
Attachments:
Description Flags
10bit AVIF image with alpha channel none

buzz_thrill_0z
Reported 2022-09-26 04:00:30 PDT
Created attachment 462620 [details] 10bit AVIF image with alpha channel 10bit AVIF images, that contain an alpha channel, cannot be rendered in Safari on iPadOS 16.1 and Ventura Even opened in their own tab the image is never displayed. Encoding the image to an 8bit AVIF using the ImageMagick command line option -depth 8 fixes the issue.
Attachments
10bit AVIF image with alpha channel (890 bytes, application/octet-stream)
2022-09-26 04:00 PDT, buzz_thrill_0z 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2022-09-26 14:26:18 PDT
<rdar://problem/100428268>
Greg
Comment 2 2022-09-29 18:55:30 PDT
I'm seeing the same issue, transparency is ignored on iOS 16.0.2 for HDR AVIF images.
Brent Fulgham
Comment 3 2022-12-13 16:09:39 PST
This is actually being tracked in: <rdar://100800464> The bug is in a component outside of WebKit, therefore resolving as MOVED since we cannot fix this in a WebKit change.
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