migrate main

include/td/display/DisplayState.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <td/display/Display.h>
+#include <td/misc/SlotGuard.h>
+
+namespace td {
+class DisplayState : public Display::State, private utils::SlotGuard {
+  public:
+	DisplayState(Display& a_Display);
+	virtual ~DisplayState() {}
+
+  protected:
+	virtual void OnAspectRatioChange(float a_Ratio) {}
+	virtual void OnKeyDown(SDL_Keycode a_Key) {}
+};
+}  // namespace td