App.window_hide
App.window_hide() -> void
Takes the game's window off the screen without closing it: its GL context or Vulkan surface, its size and its contents are kept, and the program goes on running — a hidden window does not end the run. App.window_show brings it back. It is how a launcher steps aside while the game it started with Process.spawn runs.
Keep the frame loop going while hidden so the child can be polled, but there is nothing to see: skip the drawing, and throttle the loop yourself — a hidden window is not paced by the display, so an unthrottled loop spins. It does not touch the boot splash (App.splash_hide does). Safe to call when there is no window yet, and twice. Headless there is no window and the call lowers to nothing.
``ludic skip
program Launcher {
var game: int = -1
function play() -> void {
game = Process.spawn(game_path(), new []string)
if game >= 0 { App.window_hide() }
}
handler Watch phase Update {
if game >= 0 and Process.poll(game) != -1 {
Process.free(game)
game = -1
App.window_show()
}
}
}
``
orderOut: on macOS; ShowWindow(SW_HIDE) on Windows, which also forgets any key held as the window went.