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
|
/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <dev/vcons/vcons.h>
#include <dev/vcons/vcons_io.h>
#include <dev/video/fbdev.h>
#include <sys/syslog.h>
#include <sys/cdefs.h>
#include <string.h>
__MODULE_NAME("kern_vcons");
__KERNEL_META("$Hyra$: kern_vcons.c, Ian Marco Moffett, "
"Hyra video console code");
/* Get x or y values in pixels */
#define PIX_CPY_X(scrptr) (scr->cpy_x * FONT_WIDTH)
#define PIX_CPY_Y(scrptr) (scr->cpy_y * FONT_HEIGHT)
static struct vcons_screen *screen = NULL;
static void
vcons_clear_scr(struct vcons_screen *scr)
{
struct fbdev fbdev = scr->fbdev;
scr->cpy_x = 0, scr->cpy_y = 0;
memset(scr->fbdev_mem, scr->bg, (fbdev.pitch * fbdev.height));
}
/*
* Renders a char onto the screen specified by `scr`.
*
* @x,y: In chars
*/
static void
vcons_draw_char(struct vcons_screen *scr, char c, uint32_t x, uint32_t y)
{
uint32_t *fb_ptr;
size_t idx;
const uint8_t *glyph;
/* Get a pointer to framebuffer memory */
fb_ptr = scr->fbdev_mem;
/* Get the specific glyph of `c` */
glyph = &DEFAULT_FONT_DATA[(int)c*16];
for (uint32_t cy = 0; cy < FONT_HEIGHT; ++cy) {
for (uint32_t cx = 0; cx < FONT_WIDTH; ++cx) {
idx = fbdev_get_index(&scr->fbdev, x+FONT_WIDTH-cx, y+cy);
fb_ptr[idx] = __TEST(glyph[cy], __BIT(cx)) ? scr->fg : scr->bg;
}
}
}
int
vcons_putch(struct vcons_screen *scr, char c)
{
uint32_t x = PIX_CPY_X(scr);
uint32_t y = PIX_CPY_Y(scr);
if (scr == NULL) {
return 1;
}
if (vcons_process_output(scr, c) >= 0) {
/* No need to do anything */
return 0;
}
/*
* Check text bounds
*
* We must subtract ncols,nrows by FONT_WIDTH,FONT_HEIGHT
* as each char is of that width,height and we need to account for
* that.
*/
if (x >= (scr->ncols - FONT_WIDTH)) {
/* Wrap to the next row */
++scr->cpy_y, scr->cpy_x = 0;
x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr);
}
if (y >= (scr->nrows - FONT_HEIGHT)) {
scr->cpy_y = 0;
scr->cpy_x = 0;
vcons_clear_scr(scr);
x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr);
}
vcons_draw_char(scr, c, x, y);
++scr->cpy_x;
return 0;
}
void
vcons_attach(struct vcons_screen *scr)
{
scr->fbdev = fbdev_get_front();
scr->fbdev_mem = scr->fbdev.mem;
scr->nrows = scr->fbdev.height;
scr->ncols = scr->fbdev.width;
screen = scr;
vcons_clear_scr(scr);
}
|
