On Fri, Mar 29, 2024 at 10:20:50AM +0900, Yosuke Nakayama wrote: > Dear Wayland-devel Community, Hi, > > I am currently exploring the capabilities of Weston, the reference > compositor for Wayland, specifically in the context of an application use > case that I am working on. My goal is to achieve a functionality where the > graphical output of a single application can be divided and displayed > simultaneously across two separate displays. This functionality would > enable part of the application window to be shown on one display and the > rest on another, effectively spanning the application window across > multiple screens. > > From my understanding and current experimentation with Weston, this > particular use case does not seem to be directly supported, but I'm not > sure. Does functionality exist at this time to achieve such a use case? In desktop-shell, maximized and fullscreen xdg-shell calls for a particular will *not* span across multiple outputs, nor there's a way to define a virtual output that will add up multiple physical outputs into a virtual one. For kiosk-shell, windows will be fullscreen'ed to a particular output. That doesn't mean this can't be done. With a (new) shell, or maybe with additions to desktop-shell, it would allow the following to create a virtual output:
[virtual-output] output=eDP-1,HDMI-A-1 name=MyVirtualOutput-1 Then, the compositor will advertise this output as well such that the client can issue a maximized, fullscreen request and have client spanned across those outputs. > > Thank you for your time and assistance! > > Best regards,
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