[Webkit-unassigned] [Bug 265797] JPG gain maps are not rendered as HDR

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=265797

--- Comment #2 from Greg <greg323464 at gmail.com> ---
Adobe has made several JPG gain map samples available via https://www.adobe.com/go/gainmap_sample_photos

You can also see several more via https://gregbenzphotography.com/hdr-gain-map-gallery/. These images will render as HDR on MacOS via Chrome, Edge, Brave, and Opera when browsing with an XDR or otherwise HDR-capable MacOS computer. They will render as SDR on FireFox / Safari or on displays which do not support HDR.

Last I checked (MacOS 14.0 public release), core Apple apps (Preview / Photos) did not render JPG gain maps as HDR (displayed the SDR base image). However, Sonoma did add support for ISO HDR JPG gain maps (https://developer.apple.com/videos/play/wwdc2023/10181)

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