#ifndef VGA_H
#define VGA_H

#include <stdint.h>
#include <stddef.h>

/* hardware text mode const */
enum vga_color {
        VGA_COLOR_BLACK = 0,
        VGA_COLOR_BLUE = 1,
        VGA_COLOR_GREEN = 2,
        VGA_COLOR_CYAN = 3,
        VGA_COLOR_RED = 4,
        VGA_COLOR_MAGENTA = 5,
        VGA_COLOR_BROWN = 6,
        VGA_COLOR_LIGHT_GREY = 7,
        VGA_COLOR_DARK_GREY = 8,
        VGA_COLOR_LIGHT_BLUE = 9,
        VGA_COLOR_LIGHT_GREEN = 10,
        VGA_COLOR_LIGHT_CYAN = 11,
        VGA_COLOR_LIGHT_RED = 12,
        VGA_COLOR_LIGHT_MAGENTA = 13,
        VGA_COLOR_LIGHT_BROWN = 14,
        VGA_COLOR_WHITE = 15,
}

static inline uint8_t
vga_entry_color(enum vga_color fg, enum vga_color bg)
{
        return fg | bg << 4;
}

static inline uint16_t
vga_entry(unsigned char uc, uint8_t color)
{
        return (uint16_t) uc | (uint16_t) color << 8;
}

/* using mode 3 of VGA 80x25 */
#define VGA_WIDTH 80
#define VGA_HEIGHT 25
#define VGA_MEMORY 0xB8000 /* VGA memory location */

void term_init(void);
void term_setcolor(uint8_t color);
void term_putentryat(char c, uint8_t color, size_t x, size_t y);
void term_putchar(char c);
void term_writestr(const char* data);

#endif // VGA_H