struct mvt_value;
struct mvt_layer;
enum mvt_operation {
mvt_moveto = 1,
mvt_lineto = 2,
mvt_closepath = 7
};
struct mvt_geometry {
int x;
int y;
int /* mvt_operation */ op;
mvt_geometry(int op, long long x, long long y);
};
enum mvt_geometry_type {
mvt_point = 1,
mvt_linestring = 2,
mvt_polygon = 3
};
struct mvt_feature {
std::vector<unsigned> tags;
std::vector<mvt_geometry> geometry;
int /* mvt_geometry_type */ type;
unsigned long long id;
bool has_id;
mvt_feature() {
has_id = false;
id = 0;
}
};
enum mvt_value_type {
mvt_string,
mvt_float,
mvt_double,
mvt_int,
mvt_uint,
mvt_sint,
mvt_bool
};
struct mvt_value {
mvt_value_type type;
std::string string_value;
union {
float float_value;
double double_value;
long long int_value;
unsigned long long uint_value;
long long sint_value;
bool bool_value;
} numeric_value;
bool operator<(const mvt_value &o) const;
};
struct mvt_layer {
int version;
std::string name;
std::vector<mvt_feature> features;
std::vector<std::string> keys;
std::vector<mvt_value> values;
int extent;
// Add a key-value pair to a feature, using this layer's constant pool
void tag(mvt_feature &feature, std::string key, mvt_value value);
// For tracking the key-value constants already used in this layer
std::map<std::string, size_t> key_map;
std::map<mvt_value, size_t> value_map;
};
struct mvt_tile {
std::vector<mvt_layer> layers;
std::string encode();
bool decode(std::string &message);
};
bool is_compressed(std::string const &data);
int decompress(std::string const &input, std::string &output);
int compress(std::string const &input, std::string &output);
int dezig(unsigned n);