custom_object.h

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#ifndef YAZE_ZELDA3_DUNGEON_CUSTOM_OBJECT_H_
#define YAZE_ZELDA3_DUNGEON_CUSTOM_OBJECT_H_
 
#include <cstdint>
#include <string>
#include <vector>
#include <memory>
#include <unordered_map>
 
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "app/gfx/types/snes_tile.h"
 
namespace yaze {
namespace zelda3 {
 
struct CustomObject {
  struct TileMapEntry {
    int rel_x;
    int rel_y;
    uint16_t tile_data; // vhopppcc cccccccc
  };
  
  std::vector<TileMapEntry> tiles;
  
  bool IsEmpty() const { return tiles.empty(); }
};
 
class CustomObjectManager {
 public:
  static CustomObjectManager& Get();
 
  // Initialize with the full path to the custom objects folder
  // e.g., "/path/to/project/Dungeons/Objects/Data"
  void Initialize(const std::string& custom_objects_folder);
 
  // Load a custom object from a binary file
  absl::StatusOr<std::shared_ptr<CustomObject>> LoadObject(const std::string& filename);
  
  // Get an object by ID/Subtype mapping (0x31 or 0x32)
  // Subtype index maps to the .ObjOffset table
  absl::StatusOr<std::shared_ptr<CustomObject>> GetObjectInternal(int object_id, int subtype);
 
  // Get number of subtypes for a custom object ID
  int GetSubtypeCount(int object_id) const;
 
  // Reload all cached objects (useful for editor)
  void ReloadAll();
 
 private:
  CustomObjectManager() = default;
 
  absl::StatusOr<CustomObject> ParseBinaryData(const std::vector<uint8_t>& data);
 
  std::string base_path_;
  std::unordered_map<std::string, std::shared_ptr<CustomObject>> cache_;
  
  // Mapping from subtype index to filename for ID 0x31
  static const std::vector<std::string> kSubtype1Filenames;
  // Mapping from subtype index to filename for ID 0x32
  static const std::vector<std::string> kSubtype2Filenames;
};
 
} // namespace zelda3
} // namespace yaze
 
#endif // YAZE_ZELDA3_DUNGEON_CUSTOM_OBJECT_H_