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
|
/*
* 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) ((scrptr)->cpy_x * FONT_WIDTH)
#define PIX_CPY_Y(scrptr) ((scrptr)->cpy_y * FONT_HEIGHT)
#define PIX_BOUNDS_MAX_X(scrptr) ((scrptr)->fbdev.width - FONT_WIDTH)
#define PIX_BOUNDS_MAX_Y(scrptr) ((scrptr)->fbdev.height - FONT_HEIGHT)
static struct vcons_screen *screen = NULL;
/*
* Draw the console cursor.
*
* @color: Cursor color
*/
static void
vcons_draw_cursor(struct vcons_screen *scr, uint32_t color)
{
struct vcons_cursor *cursor = &scr->cursor;
struct fbdev fbdev = scr->fbdev;
uint32_t *fbdev_mem = fbdev.mem;
uint32_t fbdev_idx = 0;
uint32_t cx, cy;
for (size_t y = VCONS_CURSOR_HEIGHT; y > 0; --y) {
for (size_t x = VCONS_CURSOR_WIDTH; x > 0; --x) {
cx = cursor->old_xpos + x;
cy = cursor->old_ypos + y;
fbdev_idx = fbdev_get_index(&fbdev, cx, cy);
fbdev_mem[fbdev_idx] = color;
}
}
}
/*
* Clear everything out of the console.
*/
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));
vcons_update_cursor(scr);
}
/*
* 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;
}
}
}
/*
* Update the cursor position.
*
* XXX: This function also accounts for the old cursor
* and clears it before drawing the new cursor.
*/
void
vcons_update_cursor(struct vcons_screen *scr)
{
struct vcons_cursor *cursor = &scr->cursor;
cursor->is_drawing = true;
if (cursor->is_drawn) {
/* Clear old cursor */
vcons_draw_cursor(scr, scr->bg);
}
cursor->old_xpos = cursor->xpos;
cursor->old_ypos = cursor->ypos;
vcons_draw_cursor(scr, scr->fg);
cursor->is_drawn = true;
cursor->is_drawing = false;
}
/*
* Write out a character on the console.
*
* @c: Character to write.
*/
int
vcons_putch(struct vcons_screen *scr, char c)
{
uint32_t x = PIX_CPY_X(scr);
uint32_t y = PIX_CPY_Y(scr);
struct vcons_cursor *cursor = &scr->cursor;
bool cursor_newline = false;
while (cursor->is_drawing);
if (scr == NULL) {
return 1;
}
if (vcons_process_output(scr, c) >= 0) {
/* No need to do anything */
return 0;
}
/* Check cursor bounds */
if (cursor->xpos >= PIX_BOUNDS_MAX_X(scr)) {
cursor->xpos = FONT_WIDTH;
cursor->ypos += FONT_HEIGHT;
cursor_newline = true;
}
if (cursor->ypos >= PIX_BOUNDS_MAX_Y(scr)) {
cursor->xpos = FONT_WIDTH;
cursor->ypos = 0;
}
/* Check text bounds */
if (x >= PIX_BOUNDS_MAX_X(scr)) {
/* Wrap to the next row */
++scr->cpy_y, scr->cpy_x = 0;
x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr);
}
if (y >= PIX_BOUNDS_MAX_Y(scr)) {
scr->cpy_y = 0;
scr->cpy_x = 0;
vcons_clear_scr(scr);
x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr);
}
if (!cursor_newline) {
cursor->xpos += FONT_WIDTH;
}
vcons_update_cursor(scr);
vcons_draw_char(scr, c, x, y);
++scr->cpy_x;
return 0;
}
/*
* Write out a string on the console.
*
* @s: String to write.
*/
int
vcons_putstr(struct vcons_screen *scr, const char *s)
{
int status;
while (*s != '\0') {
if ((status = vcons_putch(scr, *(s++))) != 0) {
return status;
}
}
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);
}
|
