NoGUI: Merge in old branch and use base NoGUI class for SDL

src/duckstation-nogui/drm_host_interface.h

@@ -0,0 +1,50 @@
+#pragma once
+#include "common/drm_display.h"
+#include "nogui_host_interface.h"
+#include <memory>
+#include <vector>
+#include <libevdev/libevdev.h>
+
+class DRMHostInterface final : public NoGUIHostInterface
+{
+public:
+  DRMHostInterface();
+  ~DRMHostInterface();
+
+  bool Initialize();
+  void Shutdown();
+
+  bool IsFullscreen() const override;
+  bool SetFullscreen(bool enabled) override;
+
+  static std::unique_ptr<NoGUIHostInterface> Create();
+
+protected:
+  virtual void FixIncompatibleSettings(bool display_osd_messages) override;
+
+  bool CreatePlatformWindow() override;
+  void DestroyPlatformWindow() override;
+  std::optional<WindowInfo> GetPlatformWindowInfo() override;
+
+  std::optional<HostKeyCode> GetHostKeyCode(const std::string_view key_code) const override;
+
+  void PollAndUpdate() override;
+
+private:
+  static void SIGTERMHandler(int sig);
+
+  void OpenEVDevFDs();
+  void CloseEVDevFDs();
+  void PollEvDevKeyboards();
+  void SetImGuiKeyMap();
+
+  std::unique_ptr<DRMDisplay> m_drm_display;
+
+  struct EvDevKeyboard
+  {
+    struct libevdev* obj;
+    int fd;
+  };
+
+  std::vector<EvDevKeyboard> m_evdev_keyboards;
+};