struct draw {
	int op;
	long long x;
	long long y;
	int necessary;

	draw(int op, long long x, long long y) {
		this->op = op;
		this->x = x;
		this->y = y;
	}

	draw() { }
};

typedef std::vector<draw> drawvec;

drawvec decode_geometry(char **meta, int z, unsigned tx, unsigned ty, int detail);
void to_tile_scale(drawvec &geom, int z, int detail);
drawvec remove_noop(drawvec geom, int type);
drawvec clip_poly(drawvec &geom, int z, int detail);
drawvec reduce_tiny_poly(drawvec &geom, int z, int detail, bool *reduced, double *accum_area);
drawvec clip_lines(drawvec &geom, int z, int detail);
drawvec simplify_lines(drawvec &geom, int z, int detail);
drawvec reorder_lines(drawvec &geom);