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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
// MIT License, Copyright (c) 2020 Marvin Borner
// Some GUI functions
#include <fs.h>
#include <gui.h>
#include <psf.h>
#include <str.h>
#include <vesa.h>
struct font *font;
void gui_write_char(int x, int y, const u32 c[3], char ch)
{
int pos = x * vbe_bpl + y * vbe_pitch;
char *draw = (char *)&fb[pos];
u32 stride = font->char_size / font->height;
for (int cy = 0; cy < font->height; cy++) {
for (int cx = 0; cx < font->width; cx++) {
u8 bits = font->chars[ch * font->char_size + cy * stride + cx / 8];
u8 bit = bits >> (7 - cx % 8) & 1;
if (bit) {
draw[vbe_bpl * cx] = c[2];
draw[vbe_bpl * cx + 1] = c[1];
draw[vbe_bpl * cx + 2] = c[0];
}
}
draw += vbe_pitch;
}
}
void gui_write(int x, int y, const u32 c[3], char *text)
{
for (u32 i = 0; i < strlen(text); i++) {
gui_write_char(x + i * font->width, y, c, text[i]);
}
}
// Abstraction
int x, y = 0;
const u32 c[3] = { 0xff, 0xff, 0xff };
void gui_term_write_char(char ch)
{
if (x + font->width > vbe_width) {
x = 0;
y += font->height;
}
if (ch >= ' ' && ch <= '~') {
gui_write_char(x, y, c, ch);
x += font->width;
} else if (ch == '\n') {
x = 0;
y += font->height;
}
}
void gui_term_write(char *text)
{
for (u32 i = 0; i < strlen(text); i++) {
gui_term_write_char(text[i]);
}
}
void gui_init(char *font_path)
{
font = psf_parse(read_file(font_path));
}
|
