vga.h

#ifndef BARESNAKE_VGA_H
#define BARESNAKE_VGA_H

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

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, 
};

#define VGA_WIDTH 80
#define VGA_HEIGHT 25

static inline uint16_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;
}

void terminal_init();
void terminal_clear_all();
void terminal_set_pos(size_t x, size_t y);
void terminal_setcolor(uint8_t color);
void terminal_putentryat(char c, uint8_t color, size_t x, size_t y);
void terminal_putchar(char c);
void terminal_write(const char* data, size_t size);
void terminal_writestring(const char* data);
void terminal_printf(const char format[], ...);

#endif