2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1995-1998 Søren Schmidt
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/module.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
38 #include <sys/sysctl.h>
39 #include <sys/consio.h>
41 #include <sys/resourcevar.h>
44 #include <machine/pc/display.h>
46 #include <dev/fb/fbreg.h>
47 #include <dev/fb/splashreg.h>
48 #include <dev/syscons/syscons.h>
50 static u_char *message;
52 static int messagelen;
57 static int nofancy = 0;
58 TUNABLE_INT("hw.syscons.saver_snake_nofancy", &nofancy);
60 #define FANCY_SNAKE (!nofancy)
61 #define LOAD_HIGH(ld) (((ld * 100 + FSCALE / 2) >> FSHIFT) / 100)
62 #define LOAD_LOW(ld) (((ld * 100 + FSCALE / 2) >> FSHIFT) % 100)
64 static inline void update_msg(void);
67 snake_saver(video_adapter_t *adp, int blank)
69 static int dirx, diry;
74 /* XXX hack for minimal changes. */
78 sc = sc_find_softc(adp, NULL);
84 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
87 sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
88 (FG_LIGHTGREY | BG_BLACK) << 8);
89 vidd_set_hw_cursor(adp, -1, -1);
90 sc_set_border(scp, 0);
91 dirx = (scp->xpos ? 1 : -1);
93 scp->xsize : -scp->xsize);
94 for (f=0; f< messagelen; f++)
95 savs[f] = scp->xpos + scp->ypos*scp->xsize;
96 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save],
97 (FG_LIGHTGREY | BG_BLACK) << 8);
103 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20],
104 (FG_LIGHTGREY | BG_BLACK) << 8);
105 for (f=messagelen-1; f > 0; f--)
108 if ((f % scp->xsize) == 0 ||
109 (f % scp->xsize) == scp->xsize - 1 ||
110 (random() % 50) == 0)
112 if ((f / scp->xsize) == 0 ||
113 (f / scp->xsize) == scp->ysize - 1 ||
114 (random() % 20) == 0)
116 savs[0] += dirx + diry;
119 load = ((averunnable.ldavg[0] * 100 + FSCALE / 2) >> FSHIFT);
121 color = FG_LIGHTGREY | BG_BLACK;
122 else if (load / mp_ncpus <= 50)
123 color = FG_LIGHTGREEN | BG_BLACK;
124 else if (load / mp_ncpus <= 75)
125 color = FG_YELLOW | BG_BLACK;
126 else if (load / mp_ncpus <= 99)
127 color = FG_LIGHTRED | BG_BLACK;
129 color = FG_RED | FG_BLINK | BG_BLACK;
131 color = FG_LIGHTGREY | BG_BLACK;
133 for (f=messagelen-1; f>=0; f--)
134 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]],
146 messagelen = sprintf(message, "%s %s", ostype, osrelease);
149 messagelen = snprintf(message, MSGBUF_LEN,
150 "%s %s (%d.%02d %d.%02d, %d.%02d)",
152 LOAD_HIGH(averunnable.ldavg[0]), LOAD_LOW(averunnable.ldavg[0]),
153 LOAD_HIGH(averunnable.ldavg[1]), LOAD_LOW(averunnable.ldavg[1]),
154 LOAD_HIGH(averunnable.ldavg[2]), LOAD_LOW(averunnable.ldavg[2]));
158 snake_init(video_adapter_t *adp)
160 message = malloc(MSGBUF_LEN, M_DEVBUF, M_WAITOK);
161 messagep = malloc(MSGBUF_LEN * sizeof *messagep, M_DEVBUF, M_WAITOK);
167 snake_term(video_adapter_t *adp)
169 free(message, M_DEVBUF);
170 free(messagep, M_DEVBUF);
174 static scrn_saver_t snake_module = {
175 "snake_saver", snake_init, snake_term, snake_saver, NULL,
178 SAVER_MODULE(snake_saver, snake_module);