#ifndef RK_VGA_H_
#define RK_VGA_H_

#include <stdint.h>

/*
 * Location of the linear text buffer
 * Used to directly modify text on screen
 * 80 columns by 25 rows
 */
#define VGA_MEMORY_ADDR 0xb8000

#define VGA_MAX_COLS 80
#define VGA_MAX_ROWS 25

#define WHITE_ON_BLACK 0x0f

#define CRTC_ADDR_PORT 0x3d4
#define CRTC_DATA_PORT 0x3d5

#define CRTC_CURSOR_LO_REGISTER 0x0f
#define CRTC_CURSOR_HI_REGISTER 0x0e

/**
 * @brief Gets the text-mode cursor's position.
 *
 * @return The position, not offset, of the cursor. Multiply this by two for the offset.
 */
uint16_t get_cursor_pos();


/**
 * @brief Sets the cursor's position in VGA text-mode.
 *
 * @param pos The position, not offset, of the cursor. Multiply by two for the offset.
 */
void set_cursor_pos(uint16_t pos);

/**
 * @brief Clears the screen in VGA text-mode by overwriting every character with a zero, then resets the cursor position.
 */
void clear_screen(void);

void popchar();

#endif