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#ifndef MBGL_MAP_TILE_ID
#define MBGL_MAP_TILE_ID
#include <cstdint>
#include <cmath>
#include <string>
#include <functional>
#include <forward_list>
#include <limits>
namespace mbgl {
class TileID {
public:
const int16_t w = 0;
const int8_t z = 0;
const int32_t x = 0, y = 0;
const int8_t sourceZ;
const float overscaling;
inline explicit TileID(int8_t z_, int32_t x_, int32_t y_, int8_t sourceZ_)
: w((x_ < 0 ? x_ - (1 << z_) + 1 : x_) / (1 << z_)), z(z_), x(x_), y(y_),
sourceZ(sourceZ_), overscaling(std::pow(2, z_ - sourceZ_)) {}
inline uint64_t to_uint64() const {
return ((std::pow(2, z) * y + x) * 32) + z;
}
inline bool operator==(const TileID& rhs) const {
return w == rhs.w && z == rhs.z && x == rhs.x && y == rhs.y;
}
inline bool operator!=(const TileID& rhs) const {
return !operator==(rhs);
}
inline bool operator<(const TileID& rhs) const {
if (w != rhs.w) return w < rhs.w;
if (z != rhs.z) return z < rhs.z;
if (x != rhs.x) return x < rhs.x;
return y < rhs.y;
}
TileID parent(int8_t z, int8_t sourceMaxZoom) const;
TileID normalized() const;
std::forward_list<TileID>
children(int8_t sourceMaxZoom = std::numeric_limits<int8_t>::max()) const;
bool isChildOf(const TileID&) const;
operator std::string() const;
};
} // namespace mbgl
namespace std {
template <>
struct hash<mbgl::TileID> {
typedef mbgl::TileID argument_type;
typedef std::size_t result_type;
result_type operator()(const mbgl::TileID& id) const {
return std::hash<uint64_t>()(id.to_uint64());
}
};
} // namespace std
#endif
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