This protocol is unstable and not intended for clients, and SDL now sorts the display list into a stable order and selects a primary display suitable for games on its own, so it isn't necessary.
Reverts e71e16950a
We might be waiting a long time for a permissions dialog, so let that complete asynchronously. While that's happening, we'll remove the device from the device list so that when we get permission the application sees the device as newly available and can open it again.
Fixes https://github.com/libsdl-org/SDL/issues/6347
This fixes having the incorrect location for mouse button presses on Steam Deck under gamescope. This works around a bug where the mouse motion appears to come at the next button press, and comes from the xwayland-pointer device instead of the xwayland-relative-pointer device which is delivering mouse button events.
Portrait displays are typically used as secondaries and almost certainly not what a user wants a game or movie initially becoming full screen on if a landscape display is available. Increase the priority of selecting a landscape display over a portrait display.
Wayland can expose displays in any arbitrary order, and doesn't have the native concept of a primary display. However, there are games that presume that the first listed display is the primary, which can lead to problems if that output isn't necessarily the ideal one, as they may use that display to build a resolution list or as the default fullscreen output. This sorts displays by position, then attempts to find the primary display, first by querying the explicit ordering hint, then the GNOME DBus property, then tries to determine the 'best' display according to the criteria that is generally ideal for games and media playback.
The makes the list of displays deterministic, as long as the desktop configuration remains static, with a reasonably appropriate one prioritized as primary, even if there is no explicit way to retrieve the primary display. In the case where a user has a particularly esoteric physical display configuration, the new hint enables explicitly overriding the sorting and selection logic, allowing the entire display order to be customized, if necessary.
Standard I/O doesn't work well with non-blocking handles, so make sure any pipes are in blocking mode before launching child processes.
Fixes https://github.com/libsdl-org/SDL/issues/10998
