Non-resizable windows can't be maximized. The window must have the SDL_WINDOW_RESIZABLE flag set, or this
will have no effect.
On some windowing systems this request is asynchronous and the new window state may not have have been
applied immediately upon the return of this function. If an immediate change is required, call
SDL_SyncWindow() to block until the changes have taken effect.
When the window state changes, an SDL_EVENT_WINDOW_MAXIMIZED event will be emitted. Note that, as this is
just a request, the windowing system can deny the state change.
When maximizing a window, whether the constraints set via SDL_SetWindowMaximumSize() are honored depends
on the policy of the window manager. Win32 and macOS enforce the constraints when maximizing, while X11
and Wayland window managers may vary.