KMSDRM/EVDEV: add VT switching support for FreeBSD (#14346)

Signed-off-by: Quentin Thébault <quentin.thebault@defenso.fr>

src/core/linux/SDL_evdev.c

@@ -329,6 +329,11 @@ void SDL_EVDEV_Poll(void)
 
     for (item = _this->first; item; item = item->next) {
         while ((len = read(item->fd, events, sizeof(events))) > 0) {
+#ifdef SDL_INPUT_FBSDKBIO
+            if (SDL_GetAtomicInt(&vt_current) == VT_THEIRS) {
+                continue;
+            }
+#endif
             len /= sizeof(events[0]);
             for (i = 0; i < len; ++i) {
                 struct input_event *event = &events[i];

src/core/linux/SDL_evdev_kbd.h

@@ -22,6 +22,14 @@
 #ifndef SDL_evdev_kbd_h_
 #define SDL_evdev_kbd_h_
 
+#ifdef SDL_INPUT_FBSDKBIO
+enum {
+    VT_OURS,
+    VT_THEIRS,
+};
+extern SDL_AtomicInt vt_current;
+#endif
+
 struct SDL_EVDEV_keyboard_state;
 typedef struct SDL_EVDEV_keyboard_state SDL_EVDEV_keyboard_state;