#ifndef _SD1306_H_
#define _SD1306_H_

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "pico/stdlib.h"

#define OLED_HEIGHT _u(32)
#define OLED_WIDTH _u(128)
#define OLED_PAGE_HEIGHT _u(8)
#define OLED_NUM_PAGES OLED_HEIGHT / OLED_PAGE_HEIGHT
#define OLED_BUF_LEN (OLED_NUM_PAGES * OLED_WIDTH)

struct render_area {
    uint8_t start_col;
    uint8_t end_col;
    uint8_t start_page;
    uint8_t end_page;

    int buflen;
};

void fill(uint8_t buf[], uint8_t fill);
void fill_page(uint8_t *buf, uint8_t fill, uint8_t page);
void print_buf_page(uint8_t buf[], uint8_t page);
void print_buf_pages(uint8_t buf[]);
void print_buf_area(uint8_t *buf, struct render_area *area);
void calc_render_area_buflen(struct render_area *area);
void oled_send_cmd(uint8_t cmd);
void oled_send_buf(uint8_t buf[], int buflen);
void oled_init(void);
void render(uint8_t *buf, struct render_area *area);


#endif