#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <mlx.h>

typedef struct      s_data
 {
     void           *mlx_ptr;
     void           *mlx_win;
}                   t_data;

typedef struct      s_point
{
    int			x;
	int			y;
}                   t_point;

void	swap(t_point *p1, t_point *p2)
{
	t_point		temp;

	temp = *p1;
	*p1 = *p2;
	*p2 = temp;
}

int		ft_abs(int num)
{
	return (num < 0 ? -num : num);
}

void    draw_line(t_data *data, t_point p0, t_point p1)
{
	int		dx;
	int		dy;
	int		err[2];
	int		sx;
	int		sy;

	dx = ft_abs(p1.x - p0.x);
	dy = -ft_abs(p1.y - p0.y);
	err[0] = dx + dy;
	sx = p0.x < p1.x ? 1 : -1;
	sy = p0.y < p1.y ? 1 : -1;
	while(1)
	{
		mlx_pixel_put(data->mlx_ptr, data->mlx_win, p0.x, p0.y, 0xffffff);
		if (p0.x == p1.x && p0.y == p1.y)
			break;
		err[1] = 2 * err[0];
		if (err[1] >= dy && (err[0] += dy))
			p0.x += sx;
		if (err[1] <= dx && (err[0] += dx))
			p0.y += sy;
	}
}

int     main(void)
{
    t_data      data;
    t_point     p1;
    t_point     p2;

    p1.x = 100;
    p1.y = 100;

    p2.x = 500;
    p2.y = 200;
    if ((data.mlx_ptr = mlx_init()) == NULL)
        return (EXIT_FAILURE);
    if ((data.mlx_win = mlx_new_window(data.mlx_ptr, 640, 480, "Hello world")) == NULL)
        return (EXIT_FAILURE);
    draw_line(&data, p2, p1);
    mlx_loop(data.mlx_ptr);
    return (EXIT_SUCCESS);
}