[Linux Wayland] add support for target-colorspace-hint=auto when using gpu-next

[Headcrabed]

Expected behavior of the wanted feature

Currently, target-colorspace-hint=auto only works with d3d11 backend.

So when using linux wayland+gpu-next with target-colorspace-hint=auto, mpv cannot detect whether HDR support is enabled on the monitor and always output HDR content, so that tonemapping would be applied by compositor rather than mpv itself.

Alternative behavior of the wanted feature

No response

Log File

No response

Sample Files

No response

[Dudemanguy]

There's no way to implement this on vulkan/wayland. If the compositor advertises HDR colorspaces, that's what will be used.

[Headcrabed]

There's no way to implement this on vulkan/wayland. If the compositor advertises HDR colorspaces, that's what will be used.

@Dudemanguy Actually this is possible: https://gitlab.freedesktop.org/pq/color-and-hdr/-/issues/43

[Dudemanguy]

Huh OK I guess that works then.

[kasper93]

Fixed by #16512