1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#pragma once
#include <stdio.h>
/** Hardware text mode color constants. */
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,
};
FILE *vga_init(void *buffer);
struct VGA : public kIoDevice {
VGA(void *addr);
void putc(char a) override;
int puts(const char *string, int length) override;
void
flush() override
{
update_cursor();
}
struct __attribute__((packed)) VGAEntry {
unsigned char text;
unsigned char foreground : 4;
unsigned char background : 4;
};
private:
void clear(enum vga_color foreground, enum vga_color background);
void update_cursor();
struct VGAEntry *buffer;
int col = 0;
int row = 0;
};
|
