[NOT AN ISSUE] SDL_SetWindowMouseRect() doesn't confine the cursor on Weston until confinement area is clicked

Hello,

The commonly used SDL_SetWindowMouseRect() SDL2 function doesn't confine the cursor on the Weston compositor.

This fun

Now, SDL_SetWindowMouseRect() uses Wayland_input_confine_pointer(). The code to this particular function is here:

https://github.com/libsdl-org/SDL/blob/3b20e0ecef9623cac2fba60b9113be1d9ef5f255/src/video/wayland/SDL_waylandevents.c#L2596

I have been trying to debug it. The values passed to wl_region_add() are correct, so it seems that either zwp_pointer_constraints_v1_confine_pointer() or zwp_confined_pointer_v1_add_listener().

Sometimes, however, in Scummvm things seem to work and cursor is indeed confined in fullscreen mode + aspect ratio correction.

Things work perfectly well on Sway, but in tinywl cursor isn't confined either. Not easy to debug because setting breakpoints in zwp_pointer_constraints_v1_confine_pointer() or zwp_confined_pointer_v1_add_listener() are both done via wl_proxy_marshal_flags().

Any idea on what could be happening here?