video.h

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#ifndef _VIDEO_H_
#define _VIDEO_H_

#include <types.h>

#define DEFAULT_ATTRIBUTE_VALUE 0x0F 
#define BLACK         0x0   
#define BLUE          0x1   
#define GREEN         0x2   
#define CYAN          0x3   
#define RED           0x4   
#define MAGENTA       0x5   
#define BROWN         0x6   
#define LIGHT_GRAY    0x7   
#define DARK_GRAY     0x8   
#define LIGHT_BLUE    0x9   
#define LIGHT_GREEN   0xA   
#define LIGHT_CYAN    0xB   
#define LIGHT_RED     0xC   
#define LIGHT_MAGENTA 0xD   
#define YELLOW        0xE   
#define WHITE         0xF   
#define COLUMNS                 80 
#define LINES                   25 
typedef struct {
        unsigned char character; 
        unsigned char attribute; 
}__attribute__ ((packed)) x86_video_mem;

struct vga_page_t {
        volatile x86_video_mem* front_buffer; 
        volatile x86_video_mem* back_buffer;  
};

void init_video();

void cursor_position_video(int n, int x, int y);

void disable_cursor(int disable);

void flip_page(int n);

void get_char_video(int n, bool front, char *c, int x, int y, char *attr);

void kputchar_video(int n, bool front, unsigned char c, int x, int y, char attr);

void switch_page(int i);

void scrollup(int n, char attr);
#endif