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PNG has been updated for the first time in 22 years — new spec supports HDR and animation (www.tomshardware.com)
submitted 1 year ago by to c/technology@lemmy.world
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[–] 1 point 1 year ago (2 children)

You'd probably get some colours that end up being quite off target. But you'll get an image to display. So in the end it depends on how much "not optimal" you're ready to accept.

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  • [–] 1 point 1 year ago* (1 child)

    Right, and it depends on what "quite off target" means. Are we talking about greens becoming purples? Or dark greens becoming bright greens? If the image is still mostly recognizable, just with poor saturation or contrast or whatever, I think it's acceptable for older software.

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  • [–] 2 points 1 year ago

    So it depends on the specific HDR encoding used, Rec2020 is the most common ones you'll see (It's meant for "pure" setups, i.e. where the source and output are tightly linked, e.g. gaming consoles or blu-ray, or so) and the raw data won't look great. While something like HLG (Hybrid-Log Gamma) is designed for better fallback (As it's meant for TV broadcast, where the output device is "whatever TV the user has"), so should just look dimmer.

    This is a HDR screenshot I took of Destiny 2, which uses Rec2020, tone mapped to SDR

    And here's the raw screenshot data from before tonemapping.

    If the second image had all the right HDR metadata, and the viewer supported it properly, then both images would match.

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