Function set_fullscreen

native/linux/src/lib.rs:86–128

(fullscreen: bool)

    static mut RELATIVE_MODE: bool = false;

    pub fn set_fullscreen(fullscreen: bool) {
        unsafe {
            // BLOOM_NO_FULLSCREEN=1 hard-disables the fullscreen path so
            // benchmark harnesses on a 4K monitor don't silently 4× their
            // pixel count when an inherited fullscreen Space leaks in.
            if NO_FULLSCREEN && fullscreen { return; }
            if DISPLAY.is_null() || X11_WINDOW == 0 { return; }

            let wm_state = x11::xlib::XInternAtom(
                DISPLAY,
                b"_NET_WM_STATE\0".as_ptr() as *const _,
                0,
            );
            let wm_fullscreen = x11::xlib::XInternAtom(
                DISPLAY,
                b"_NET_WM_STATE_FULLSCREEN\0".as_ptr() as *const _,
                0,
            );

            let action = if fullscreen { 1 } else { 0 }; // _NET_WM_STATE_ADD / _REMOVE

            let mut event: x11::xlib::XClientMessageEvent = std::mem::zeroed();
            event.type_ = x11::xlib::ClientMessage;
            event.window = X11_WINDOW;
            event.message_type = wm_state;
            event.format = 32;
            event.data.set_long(0, action);
            event.data.set_long(1, wm_fullscreen as i64);
            event.data.set_long(2, 0);
            event.data.set_long(3, 1); // source: normal application

            let root = x11::xlib::XDefaultRootWindow(DISPLAY);
            x11::xlib::XSendEvent(
                DISPLAY,
                root,
                0,
                x11::xlib::SubstructureRedirectMask | x11::xlib::SubstructureNotifyMask,
                &mut event as *mut x11::xlib::XClientMessageEvent as *mut x11::xlib::XEvent,
            );
            x11::xlib::XFlush(DISPLAY);
            IS_FULLSCREEN = fullscreen;
        }
    }

    pub fn toggle_fullscreen() {
        unsafe { set_fullscreen(!IS_FULLSCREEN); }