diggable_tiles.h

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#ifndef YAZE_ZELDA3_OVERWORLD_DIGGABLE_TILES_H
#define YAZE_ZELDA3_OVERWORLD_DIGGABLE_TILES_H
 
#include <array>
#include <cstdint>
#include <vector>
 
#include "app/gfx/types/snes_tile.h"
 
namespace yaze::zelda3 {
 
// Tile types that indicate diggable ground
constexpr uint8_t kTileTypeDiggable1 = 0x48;
constexpr uint8_t kTileTypeDiggable2 = 0x4A;
 
// Bitfield size: 512 bits = 64 bytes (one bit per Map16 tile ID 0-511)
constexpr int kDiggableTilesBitfieldSize = 64;
constexpr int kMaxDiggableTileId = 512;
 
// ROM addresses for custom diggable tiles table
constexpr int kOverworldCustomDiggableTilesArray = 0x140980;
constexpr int kOverworldCustomDiggableTilesEnabled = 0x140149;
 
// Vanilla diggable Map16 tile IDs (from bank 1B at $1BBDF4-$1BBE24)
constexpr uint16_t kVanillaDiggableTiles[] = {
    0x0034, 0x0071, 0x0035, 0x010D, 0x010F,
    0x00E1, 0x00E2, 0x00DA, 0x00F8, 0x010E
};
constexpr int kNumVanillaDiggableTiles = 10;
 
class DiggableTiles {
 public:
  DiggableTiles() = default;
 
  bool IsDiggable(uint16_t tile_id) const;
 
  void SetDiggable(uint16_t tile_id, bool diggable);
 
  void Clear();
 
  void SetVanillaDefaults();
 
  std::vector<uint16_t> GetAllDiggableTileIds() const;
 
  int GetDiggableCount() const;
 
  void FromBytes(const uint8_t* data);
 
  void ToBytes(uint8_t* data) const;
 
  const std::array<uint8_t, kDiggableTilesBitfieldSize>& GetRawData() const {
    return bitfield_;
  }
 
  static bool IsTile16Diggable(
      const gfx::Tile16& tile16,
      const std::array<uint8_t, 0x200>& all_tiles_types);
 
 private:
  std::array<uint8_t, kDiggableTilesBitfieldSize> bitfield_ = {};
};
 
}  // namespace yaze::zelda3
 
#endif  // YAZE_ZELDA3_OVERWORLD_DIGGABLE_TILES_H