#pragma once

#include <stdbool.h>
#include <stdint.h>

enum {
    VGA_ROWS = 25,
    VGA_COLS = 80,

    VGA_CTRL_REGISTER = 0x3d4,
    VGA_DATA_REGISTER = 0x3d5,
    VGA_OFFSET_LOW = 0x0f,
    VGA_OFFSET_HIGH = 0x0e,
};

unsigned vga_get_cursor();
unsigned vga_get_row_from_offset(unsigned offset);
unsigned vga_get_offset(unsigned col, unsigned row);
void vga_set_cursor(unsigned offset);

void vga_clear_screen();
void vga_set_char(unsigned offset, char c);
void vga_print_string(const char *s);

#define VGA_GRAPHICS_WIDTH 320
#define VGA_GRAPHICS_HEIGHT 200

typedef enum {
    VGA_DISPLAY_MODE_TEXT = 0,
    VGA_DISPLAY_MODE_GRAPHICS = 1,
} vga_display_mode_t;

void vgaMode13();
void vgaMode3();
void switch_to_graphics_mode();
void switch_to_text_mode();
vga_display_mode_t vga_get_display_mode();
bool vga_is_text_mode();