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

src/duckstation-nogui/nogui_host_interface.h

@@ -0,0 +1,73 @@
+#pragma once
+#include "common/window_info.h"
+#include "core/host_display.h"
+#include "core/host_interface.h"
+#include "frontend-common/common_host_interface.h"
+#include <array>
+#include <deque>
+#include <functional>
+#include <map>
+#include <memory>
+#include <mutex>
+#include <string>
+
+class INISettingsInterface;
+
+class NoGUIHostInterface : public CommonHostInterface
+{
+public:
+  NoGUIHostInterface();
+  ~NoGUIHostInterface();
+
+  const char* GetFrontendName() const override;
+
+  virtual bool Initialize() override;
+  virtual void Shutdown() override;
+  virtual void Run();
+
+  std::string GetStringSettingValue(const char* section, const char* key, const char* default_value = "") override;
+  bool GetBoolSettingValue(const char* section, const char* key, bool default_value = false) override;
+  int GetIntSettingValue(const char* section, const char* key, int default_value = 0) override;
+  float GetFloatSettingValue(const char* section, const char* key, float default_value = 0.0f) override;
+
+  void RunLater(std::function<void()> callback) override;
+  void ApplySettings(bool display_osd_messages) override;
+
+protected:
+  enum : u32
+  {
+    DEFAULT_WINDOW_WIDTH = 1280,
+    DEFAULT_WINDOW_HEIGHT = 720
+  };
+
+  virtual void LoadSettings() override;
+
+  bool AcquireHostDisplay() override;
+  void ReleaseHostDisplay() override;
+
+  void UpdateInputMap() override;
+
+  void OnSystemCreated() override;
+  void OnSystemPaused(bool paused) override;
+  void OnSystemDestroyed() override;
+  void OnRunningGameChanged() override;
+
+  void RequestExit() override;
+  virtual void PollAndUpdate() override;
+
+  virtual bool CreatePlatformWindow() = 0;
+  virtual void DestroyPlatformWindow() = 0;
+  virtual std::optional<WindowInfo> GetPlatformWindowInfo() = 0;
+  void OnPlatformWindowResized(u32 new_width, u32 new_height, float new_scale);
+
+  bool CreateDisplay();
+  void DestroyDisplay();
+  void CreateImGuiContext();
+  void RunCallbacks();
+
+  std::unique_ptr<INISettingsInterface> m_settings_interface;
+  std::deque<std::function<void()>> m_queued_callbacks;
+  std::mutex m_queued_callbacks_lock;
+
+  bool m_quit_request = false;
+};