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
69
70
71
72
73
74
75
76
|
#include "vterm.h"
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
struct psf2 font;
void *font_data;
void font_load(const char *path) {
FILE *f = fopen(path, "r");
if (!f) {
err(1, "couldn't open font \"%s\"", path);
}
void *buf;
long buflen;
fseek(f, 0, SEEK_END);
buflen = ftell(f);
if (buflen < 0) {
errx(1, "can't get the size of \"%s\"", path);
}
buf = malloc(buflen);
if (!buf) {
err(1, "out of memory");
}
fseek(f, 0, SEEK_SET);
fread(buf, 1, buflen, f);
if (ferror(f)) {
err(1, "error reading font");
}
fclose(f);
if (!memcmp(buf, "\x72\xb5\x4a\x86", 4)) {
memcpy(&font, buf, sizeof font);
font_data = buf + font.glyph_offset;
} else if (!memcmp(buf, "\x36\x04", 2)) {
struct psf1 *hdr = buf;
font = (struct psf2){
.glyph_amt = 256,
.glyph_size = hdr->h,
.h = hdr->h,
.w = 8,
};
font_data = buf + 4;
} else {
errx(1, "invalid psf header");
}
}
void font_blit(uint32_t glyph, int x, int y) {
if (glyph >= font.glyph_amt) glyph = 0;
if (x < 0 || (x+1) * font.w >= fb.width ||
y < 0 || (y+1) * font.h >= fb.height)
{
return;
}
dirty_mark(&dirty, x * font.w, y * font.h);
dirty_mark(&dirty, (x+1) * font.w - 1, (y+1) * font.h - 1);
char *bitmap = font_data + font.glyph_size * glyph;
for (size_t i = 0; i < font.w; i++) {
for (size_t j = 0; j < font.h; j++) {
size_t idx = j * font.w + i;
char byte = bitmap[idx / 8];
byte >>= (7-(idx&7));
byte &= 1;
*((uint32_t*)&fb.b[fb.pitch * (y * font.h + j) + 4 * (x * font.w + i)]) = byte * 0xB0B0B0;
}
}
return;
}
|
