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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
#include "font.h"
#include "font_classic.h"
#include "gfx.h"
#include "heap.h"
#include "memory.h"
#include "math.h"
#include "font_builtin.c"
// important: must be a multiple of 2, else code won't work
#define TAB_SIZE 4
#define CHAR_WIDTH 8
#define CHAR_HEIGHT 16
static u8 *font; // u8[256][16]
static u16 font_size;
static u16 outer_width, outer_height;
static u16 cursor_x, cursor_y;
static u16 screen_width, screen_height;
void font_init()
{
font = kmalloc(256 * 16);
}
void font_set_size(u16 size)
{
font_size = size;
outer_width = CHAR_WIDTH * font_size;
outer_height = CHAR_HEIGHT * font_size;
screen_width = gfx_info->width / outer_width;
screen_height = gfx_info->height / outer_height;
}
void font_set_cursor(term_pos new_cursor)
{
cursor_x = new_cursor.x;
cursor_y = new_cursor.y;
}
term_pos font_get_cursor()
{
return (term_pos){cursor_x, cursor_y};
}
term_pos font_get_size()
{
return (term_pos){screen_width, screen_height};
}
void font_load_blob(const void *blob)
{
lmemcpy(font, blob, 256*16);
}
void font_load_builtin()
{
lmemcpy(font, fs_fonts_ter_u16n_cuddlefont, 256*16);
}
void font_load_classic()
{
memset(font, 0, 256 * 16);
classic_char *cfont = font_classic();
int scale = 2;
int xpad = (CHAR_WIDTH - CLASSIC_CHAR_WIDTH * scale) / 2;
int ypad = (CHAR_HEIGHT - CLASSIC_CHAR_HEIGHT * scale) / 2;
for (int i = 0; i < 255; i++)
for (int xc = 0; xc < CLASSIC_CHAR_WIDTH; xc++)
for (int yc = 0; yc < CLASSIC_CHAR_HEIGHT; yc++) {
if (!cfont[i].data[yc * CLASSIC_CHAR_WIDTH + xc])
continue;
for (int xf = 0; xf < scale; xf++)
for (int yf = 0; yf < scale; yf++) {
int x = xc * scale + xpad + xf;
int y = yc * scale + ypad + yf;
font[i * CHAR_HEIGHT + y] |= (1 << x);
}
}
kfree(cfont);
}
void font_clear_screen()
{
cursor_x = cursor_y = 0;
gfx_set_area(0, 0, gfx_info->width, gfx_info->height, 0xFF000000);
}
static void render_char(u8 c)
{
u16 base_x = cursor_x * outer_width;
u16 base_y = cursor_y * outer_height;
gfx_set_area(base_x, base_y, outer_width, outer_height, 0xFF000000);
for (u16 x = 0; x < CHAR_WIDTH; x++)
for (u16 y = 0; y < CHAR_HEIGHT; y++) {
if (!(font[c * CHAR_HEIGHT + y] & (1 << x)))
continue;
gfx_set_area(
base_x + x * font_size,
base_y + y * font_size,
font_size, font_size, 0xFFFFFFFF);
}
}
static void update_cursor()
{
while (cursor_x >= screen_width) {
cursor_x -= screen_width;
cursor_y++;
}
while (cursor_y >= screen_height) {
cursor_y--;
lmemcpy((void *) (u64) gfx_info->framebuffer,
(void *) (u64) gfx_info->framebuffer + gfx_info->pitch * outer_height,
gfx_info->pitch * (gfx_info->height - outer_height));
gfx_set_area(0, gfx_info->height-outer_height, gfx_info->width, outer_height, 0xFF000000);
}
gfx_set_area(cursor_x * outer_width, cursor_y * outer_height,
outer_width, outer_height, 0xFFFFFFFF);
}
void print_char(char c)
{
switch (c) {
case '\n':
render_char(' ');
cursor_y++;
cursor_x = 0;
break;
case '\t':
render_char(' ');
cursor_x = (cursor_x + TAB_SIZE) & ~(TAB_SIZE - 1);
break;
case '\b':
if (cursor_x > 0) {
render_char(' ');
cursor_x--;
}
break;
case '\r':
render_char(' ');
cursor_x = 0;
break;
case '\v':
// vertical tab intentionally unimplemented
break;
case '\a':
// todo: bell
break;
case '\f':
font_clear_screen();
break;
default:
render_char(c);
cursor_x++;
}
update_cursor();
}
void print(str line)
{
for (usize i = 0; i < line.len; i++)
print_char(line.data[i]);
}
void print_num_pad(u64 x, u8 base, u8 pad_len, char pad_char)
{
char buffer[64];
usize idx = 64;
do {
u8 digit = x % base;
buffer[--idx] = digit + (digit < 10 ? '0' : ('A' - 10));
x /= base;
} while (x != 0);
while (idx > (usize) (64 - pad_len))
buffer[--idx] = pad_char;
print((str) { 64 - idx, &buffer[idx] });
}
void print_num(u64 x, u8 base)
{
print_num_pad(x, base, 0, ' ');
}
void print_dec(u64 x)
{
print_num(x, 10);
}
void print_hex(u64 x)
{
print_num(x, 16);
}
void print_dbl(double d, u8 points)
{
if (d < 0) {
print_char('-');
d = -d;
}
long i = d;
print_dec(i);
print_char('.');
print_num_pad((d - (double) i) * (double) ipow(10, points), 10, points, '0');
}
|
