[Cin] Apple's EDR technology

[Pekka Paalanen]

On Sat, 31 May 2025 11:05:26 +0300
Andrew Randrianasulu <randrianasulu at gmail.com> wrote:

> At least back in 2021 Apple was still using Metal (their  Vulkan-like
> graphics API) and OpenGL for system-wide compositing, not sure if it
> changed or not lately?

The choice of graphics API is largely inconsequential. Both Vulkan and
OpenGL have the necessary metadata extensions nowadays, but they do
need to be implemented with the underlying window system.

> Still I am not sure how this provides HDR-like experience on SDR display
> (may be by using dynamic mapping?)

I've made a statement related to that, when someone insisted that HDR
is somehow fundamentally different from SDR:

https://gitlab.freedesktop.org/pq/color-and-hdr/-/issues/40#note_2785741
https://gitlab.freedesktop.org/pq/color-and-hdr/-/issues/40#note_2790213

Steve Yedlin's video is worth watching:
https://www.yedlin.net/DebunkingHDR/

Apparently
https://gitlab.freedesktop.org/pq/color-and-hdr/-/issues/40#note_2845056
was a good watch, too.


Thanks,
pq
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