#if !defined(MAIN_H_)
#define MAIN_H_

#include <png.h>

#define INFTY 100

struct pngdata {
	int width, height;
	png_bytep *rows;
};

struct z {
	double re, im;
};

struct roots {
    struct z z[3];
    int n;
};

void
newton(struct pngdata *pd);

unsigned long
newt_iter(struct z z, struct z* p, struct roots *roots, double eps);

int
close_to(struct z a, struct z b, double eps);

#endif /* !defined(MAIN_H_) */