Move GameList to FrontendCommon

Reduces libretro core dependencies further.

src/frontend-common/game_settings.h

@@ -0,0 +1,75 @@
+#pragma once
+#include "core/types.h"
+#include <bitset>
+#include <optional>
+#include <string>
+#include <unordered_map>
+
+class ByteStream;
+
+namespace GameSettings {
+enum class Trait : u32
+{
+  ForceInterpreter,
+  ForceSoftwareRenderer,
+  ForceInterlacing,
+  DisableTrueColor,
+  DisableUpscaling,
+  DisableScaledDithering,
+  DisableWidescreen,
+  DisablePGXP,
+  DisablePGXPCulling,
+  ForcePGXPVertexCache,
+  ForcePGXPCPUMode,
+  ForceDigitalController,
+  ForceRecompilerMemoryExceptions,
+  ForceRecompilerICache,
+
+  Count
+};
+
+const char* GetTraitName(Trait trait);
+const char* GetTraitDisplayName(Trait trait);
+
+struct Entry
+{
+  std::bitset<static_cast<int>(Trait::Count)> traits{};
+  std::optional<s16> display_active_start_offset;
+  std::optional<s16> display_active_end_offset;
+
+  // user settings
+  std::optional<DisplayCropMode> display_crop_mode;
+  std::optional<DisplayAspectRatio> display_aspect_ratio;
+  std::optional<ControllerType> controller_1_type;
+  std::optional<ControllerType> controller_2_type;
+  std::optional<bool> gpu_widescreen_hack;
+
+  ALWAYS_INLINE bool HasTrait(Trait trait) const { return traits[static_cast<int>(trait)]; }
+  ALWAYS_INLINE void AddTrait(Trait trait) { traits[static_cast<int>(trait)] = true; }
+  ALWAYS_INLINE void RemoveTrait(Trait trait) { traits[static_cast<int>(trait)] = false; }
+  ALWAYS_INLINE void SetTrait(Trait trait, bool enabled) { traits[static_cast<int>(trait)] = enabled; }
+
+  bool HasAnySettings() const;
+
+  bool LoadFromStream(ByteStream* stream);
+  bool SaveToStream(ByteStream* stream) const;
+
+  void ApplySettings(bool display_osd_messages) const;
+};
+
+class Database
+{
+public:
+  Database();
+  ~Database();
+
+  const Entry* GetEntry(const std::string& code) const;
+  void SetEntry(const std::string& code, const std::string& name, const Entry& entry, const char* save_path);
+
+  bool Load(const char* path);
+
+private:
+  std::unordered_map<std::string, Entry> m_entries;
+};
+
+}; // namespace GameSettings