Swayimg window size constrained to ~33% of screen when set as floating in Niri (4K monitor)

[linux36524]

When using Swayimg as a floating window in the Niri Wayland compositor, the window does not open at its intended size. Instead, it is consistently constrained to approximately 33% of the screen width, despite having set open-floating true in Niri without any explicit size restrictions. This occurs even when Swayimg's own configuration (e.g., on_image_change or swayimg.set_window_size) attempts to resize the window dynamically based on the image dimensions.

Environment:

Compositor: Niri (latest)

Swayimg: latest git

Monitor: 4K (3840x2160)

Is there a recommended way for Swayimg to override this compositor-enforced size, or is this a limitation on the Niri side?

[Sempyos]

Can you replicate the issue on sway, gnome, and cosmic-comp

[linux36524]

I tested it on niri and labwc, and the issue can be reproduced on both.

So it does not seem to be related to niri specifically.

[Sempyos]

Ah