vga.h

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#ifndef VGA_H
#define VGA_H

#include <stdint.h>
#include "assembly/io.h"

// Legacy shit, please switch to 03h defines or proper to current graphic mode
// TODO: Remove this
#define VGA_COLOR_BLACK 0x00
#define VGA_COLOR_BLUE 0x01
#define VGA_COLOR_GREEN 0x02
#define VGA_COLOR_CYAN 0x03
#define VGA_COLOR_RED 0x04
#define VGA_COLOR_MAGENTA 0x05
#define VGA_COLOR_BROWN 0x06
#define VGA_COLOR_LIGHT_GRAY 0x07
#define VGA_COLOR_DARK_GRAY 0x08
#define VGA_COLOR_LIGHT_BLUE 0x09
#define VGA_COLOR_LIGHT_GREEN 0x0A
#define VGA_COLOR_LIGHT_CYAN 0x0B
#define VGA_COLOR_LIGHT_RED 0x0C
#define VGA_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_COLOR_YELLOW 0x0E
#define VGA_COLOR_WHITE 0x0F
#define VGA_NOT_BLINK 0x00
#define VGA_BLINK 0x01

enum VGA_TEXT_MODES
{
    VGA_MODE_00H = 0x00, 
    VGA_MODE_01H = 0x01, 
    VGA_MODE_02H = 0x02, 
    VGA_MODE_03H = 0x03, 
    VGA_MODE_07H = 0x07 
};

// Mode 00h

#define VGA_MODE_00H_BASE_ADDR 0xC00B8000
#define VGA_MODE_00H_SCREEN_COLUMNS 40
#define VGA_MODE_00H_SCREEN_ROWS 25

#define VGA_MODE_00H_COLOR_BLACK 0x00
#define VGA_MODE_00H_COLOR_BLUE 0x01
#define VGA_MODE_00H_COLOR_GREEN 0x02
#define VGA_MODE_00H_COLOR_CYAN 0x03
#define VGA_MODE_00H_COLOR_RED 0x04
#define VGA_MODE_00H_COLOR_MAGENTA 0x05
#define VGA_MODE_00H_COLOR_BROWN 0x06
#define VGA_MODE_00H_COLOR_LIGHT_GRAY 0x07
#define VGA_MODE_00H_COLOR_DARK_GRAY 0x08
#define VGA_MODE_00H_COLOR_LIGHT_BLUE 0x09
#define VGA_MODE_00H_COLOR_LIGHT_GREEN 0x0A
#define VGA_MODE_00H_COLOR_LIGHT_CYAN 0x0B
#define VGA_MODE_00H_COLOR_LIGHT_RED 0x0C
#define VGA_MODE_00H_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_MODE_00H_COLOR_YELLOW 0x0E
#define VGA_MODE_00H_COLOR_WHITE 0x0F
#define VGA_MODE_00H_NOT_BLINK 0x00
#define VGA_MODE_00H_BLINK 0x01

#define VGA_MODE_00H_MAX_SCREENS 8
#define VGA_MODE_00H_SCREEN_OFFSET 4000

// Mode 01h

#define VGA_MODE_01H_BASE_ADDR 0xC00B8000
#define VGA_MODE_01H_SCREEN_COLUMNS 40
#define VGA_MODE_01H_SCREEN_ROWS 25

#define VGA_MODE_01H_COLOR_BLACK 0x00
#define VGA_MODE_01H_COLOR_BLUE 0x01
#define VGA_MODE_01H_COLOR_GREEN 0x02
#define VGA_MODE_01H_COLOR_CYAN 0x03
#define VGA_MODE_01H_COLOR_RED 0x04
#define VGA_MODE_01H_COLOR_MAGENTA 0x05
#define VGA_MODE_01H_COLOR_BROWN 0x06
#define VGA_MODE_01H_COLOR_LIGHT_GRAY 0x07
#define VGA_MODE_01H_COLOR_DARK_GRAY 0x08
#define VGA_MODE_01H_COLOR_LIGHT_BLUE 0x09
#define VGA_MODE_01H_COLOR_LIGHT_GREEN 0x0A
#define VGA_MODE_01H_COLOR_LIGHT_CYAN 0x0B
#define VGA_MODE_01H_COLOR_LIGHT_RED 0x0C
#define VGA_MODE_01H_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_MODE_01H_COLOR_YELLOW 0x0E
#define VGA_MODE_01H_COLOR_WHITE 0x0F
#define VGA_MODE_01H_NOT_BLINK 0x00
#define VGA_MODE_01H_BLINK 0x01

#define VGA_MODE_01H_MAX_SCREENS 8
#define VGA_MODE_01H_SCREEN_OFFSET 4000

// Mode 02h

#define VGA_MODE_02H_BASE_ADDR 0xC00B8000
#define VGA_MODE_02H_SCREEN_COLUMNS 80
#define VGA_MODE_02H_SCREEN_ROWS 25

#define VGA_MODE_02H_COLOR_BLACK 0x00
#define VGA_MODE_02H_COLOR_BLUE 0x01
#define VGA_MODE_02H_COLOR_GREEN 0x02
#define VGA_MODE_02H_COLOR_CYAN 0x03
#define VGA_MODE_02H_COLOR_RED 0x04
#define VGA_MODE_02H_COLOR_MAGENTA 0x05
#define VGA_MODE_02H_COLOR_BROWN 0x06
#define VGA_MODE_02H_COLOR_LIGHT_GRAY 0x07
#define VGA_MODE_02H_COLOR_DARK_GRAY 0x08
#define VGA_MODE_02H_COLOR_LIGHT_BLUE 0x09
#define VGA_MODE_02H_COLOR_LIGHT_GREEN 0x0A
#define VGA_MODE_02H_COLOR_LIGHT_CYAN 0x0B
#define VGA_MODE_02H_COLOR_LIGHT_RED 0x0C
#define VGA_MODE_02H_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_MODE_02H_COLOR_YELLOW 0x0E
#define VGA_MODE_02H_COLOR_WHITE 0x0F
#define VGA_MODE_02H_NOT_BLINK 0x00
#define VGA_MODE_02H_BLINK 0x01

#define VGA_MODE_02H_MAX_SCREENS 8
#define VGA_MODE_02H_SCREEN_OFFSET 4000

// Mode 03h

#define VGA_MODE_03H_BASE_ADDR 0xC00B8000
#define VGA_MODE_03H_SCREEN_COLUMNS 80
#define VGA_MODE_03H_SCREEN_ROWS 25

#define VGA_MODE_03H_COLOR_BLACK 0x00
#define VGA_MODE_03H_COLOR_BLUE 0x01
#define VGA_MODE_03H_COLOR_GREEN 0x02
#define VGA_MODE_03H_COLOR_CYAN 0x03
#define VGA_MODE_03H_COLOR_RED 0x04
#define VGA_MODE_03H_COLOR_MAGENTA 0x05
#define VGA_MODE_03H_COLOR_BROWN 0x06
#define VGA_MODE_03H_COLOR_LIGHT_GRAY 0x07
#define VGA_MODE_03H_COLOR_DARK_GRAY 0x08
#define VGA_MODE_03H_COLOR_LIGHT_BLUE 0x09
#define VGA_MODE_03H_COLOR_LIGHT_GREEN 0x0A
#define VGA_MODE_03H_COLOR_LIGHT_CYAN 0x0B
#define VGA_MODE_03H_COLOR_LIGHT_RED 0x0C
#define VGA_MODE_03H_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_MODE_03H_COLOR_YELLOW 0x0E
#define VGA_MODE_03H_COLOR_WHITE 0x0F
#define VGA_MODE_03H_NOT_BLINK 0x00
#define VGA_MODE_03H_BLINK 0x01

#define VGA_MODE_03H_MAX_SCREENS 8
#define VGA_MODE_03H_SCREEN_OFFSET 4000

// Mode 07h

#define VGA_MODE_07H_BASE_ADDR 0xC00B0000
#define VGA_MODE_07H_SCREEN_COLUMNS 80
#define VGA_MODE_07H_SCREEN_ROWS 25

#define VGA_MODE_07H_COLOR_BLACK 0x00
#define VGA_MODE_07H_COLOR_BLUE 0x01
#define VGA_MODE_07H_COLOR_GREEN 0x02
#define VGA_MODE_07H_COLOR_CYAN 0x03
#define VGA_MODE_07H_COLOR_RED 0x04
#define VGA_MODE_07H_COLOR_MAGENTA 0x05
#define VGA_MODE_07H_COLOR_BROWN 0x06
#define VGA_MODE_07H_COLOR_LIGHT_GRAY 0x07
#define VGA_MODE_07H_COLOR_DARK_GRAY 0x08
#define VGA_MODE_07H_COLOR_LIGHT_BLUE 0x09
#define VGA_MODE_07H_COLOR_LIGHT_GREEN 0x0A
#define VGA_MODE_07H_COLOR_LIGHT_CYAN 0x0B
#define VGA_MODE_07H_COLOR_LIGHT_RED 0x0C
#define VGA_MODE_07H_COLOR_LIGHT_MAGENTA 0x0D
#define VGA_MODE_07H_COLOR_YELLOW 0x0E
#define VGA_MODE_07H_COLOR_WHITE 0x0F
#define VGA_MODE_07H_NOT_BLINK 0x00
#define VGA_MODE_07H_BLINK 0x01

#define VGA_MODE_07H_MAX_SCREENS 1
#define VGA_MODE_07H_SCREEN_OFFSET 4000

typedef struct vga_screen_pos
{
    uint16_t x;
    uint16_t y;
} vga_screen_pos;


typedef struct vga_color_with_blink
{
    unsigned char letter : 4;
    unsigned char background : 3;
    unsigned char blikning : 1;
} vga_color_with_blink;


typedef struct vga_color_without_blink
{
    unsigned char letter : 4;
    unsigned char background : 4;
} vga_color_without_blink;


typedef union vga_color {
    vga_color_with_blink color_with_blink;
    vga_color_without_blink color_without_blink;
    uint8_t value;
} vga_color;


typedef struct vga_character
{
    unsigned char ascii_code;
    vga_color color;
} vga_character;


typedef union screen_char {
    uint16_t value;
    vga_character character;
} screen_char;

// Functions for users


uint8_t vga_init(uint8_t mode);


void vga_printchar(char character);


void vga_printchar_color(char character, vga_color *color);


void vga_printstring(const char *str);


void vga_printstring_color(const char *str, vga_color *color);


void vga_set_char(uint16_t x, uint16_t y, char character);


void vga_set_char_struct(vga_screen_pos spos, char character);


char vga_get_char(uint16_t x, uint16_t y);


char vga_get_char_struct(vga_screen_pos spos);


void vga_set_color(uint16_t x, uint16_t y, vga_color col);


void vga_set_color_struct(vga_screen_pos spos, vga_color col);


union vga_color vga_get_color(uint16_t x, uint16_t y);


union vga_color vga_get_color_struct(vga_screen_pos spos);


void vga_set_character(uint16_t x, uint16_t y, vga_character character);


void vga_set_character_struct(vga_screen_pos spos, vga_character character);


vga_character vga_get_character(uint16_t x, uint16_t y);


vga_character vga_get_character_struct(vga_screen_pos spos);


void vga_set_cursor_pos(uint16_t x, uint16_t y);


void vga_set_cursor_pos_struct(vga_screen_pos spos);


vga_screen_pos vga_get_cursor_pos();


void vga_clear_screen();


void vga_clear_given_screen(uint8_t screen);


void vga_clear_all_screens();


void vga_change_printing_screen(uint8_t screen);


void vga_copy_screen(uint8_t from, uint8_t to);


void vga_cursor_on();


void vga_cursor_off();


void vga_newline();

// Helpers


uint16_t __vga_calcualte_position_with_offset(uint16_t x, uint16_t y);


uint16_t __vga_calcualte_position_without_offset(uint16_t x, uint16_t y);


void __vga_enable_cursor(uint8_t cursor_start, uint8_t cursor_end);


void __vga_disable_cursor();


vga_color __vga_get_default_terminal_color(uint8_t vga_current_mode);

#endif