Wrong colors on Wayland [Hyprland] with XRGB Buffers

[eneoli]

What happened?

Taking a screnshot on Hyprland v0.40. turns blue colors into red colos and red colors into blue colors.

How can we reproduce the bug?

1. Run flakeshot on wayland
2. Take a screenshot

Display Protocol

Wayland

Which Linux Distro do you use?

Arch

How many monitors do you have and how are they orientated? If you can, please include images of your layout.

Tested on 1 laptop screen and two stationary monitors both in landscape

Relevant log output

No response

[eneoli]

ok thats weird: the buffer type is said to be an Xrgb8888. But in fact it seems to be bgr(A|X?)8888?

[eneoli]

That does the trick (in src/backend/wayland/mod.rs)

Format::Xrgb8888 => {
            // switch r and b channel
            data.chunks_mut(4)
                .for_each(|chunk| {
                    (chunk[0], chunk[2]) = (chunk[2], chunk[0]);
                });
}

But why?

[eneoli]

Maybe thats the culprit: https://github.com/hyprwm/Hyprland/blob/main/src/protocols/ToplevelExportWlrFuncs.hpp#L212