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freebsd-skq/sys/dev/syscons/daemon/daemon_saver.c
Mateusz Guzik d63738087e syscons: clean up empty lines in .c and .h files
2020-09-01 21:29:44 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1997 Sandro Sigala, Brescia, Italy.
* Copyright (c) 1997 Chris Shenton
* Copyright (c) 1995 Søren Schmidt
* 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
* in this position and unchanged.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/consio.h>
#include <sys/fbio.h>
#include <machine/pc/display.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/splashreg.h>
#include <dev/syscons/syscons.h>
#define DAEMON_MAX_WIDTH 32
#define DAEMON_MAX_HEIGHT 19
static u_char *message;
static int messagelen;
static int blanked;
static int attr_mask;
#define ATTR(attr) (((attr) & attr_mask) << 8)
/* Who is the author of this ASCII pic? */
static u_char *daemon_pic[] = {
" , ,",
" /( )`",
" \\ \\___ / |",
" /- _ `-/ '",
" (/\\/ \\ \\ /\\",
" / / | ` \\",
" O O ) / |",
" `-^--'`< '",
" (_.) _ ) /",
" `.___/` /",
" `-----' /",
"<----. __ / __ \\",
"<----|====O)))==) \\) /====",
"<----' `--' `.__,' \\",
" | |",
" \\ / /\\",
" ______( (_ / \\______/",
" ,' ,-----' |",
" `--{__________)",
NULL
};
static u_char *daemon_attr[] = {
" R R",
" RR RR",
" R RRRR R R",
" RR W RRR R",
" RWWW W R RR",
" W W W R R",
" B B W R R",
" WWWWWWRR R",
" RRRR R R R",
" RRRRRRR R",
" RRRRRRR R",
"YYYYYY RR R RR R",
"YYYYYYYYYYRRRRYYR RR RYYYY",
"YYYYYY RRRR RRRRRR R",
" R R",
" R R RR",
" CCCCCCR RR R RRRRRRRR",
" CC CCCCCCC C",
" CCCCCCCCCCCCCCC",
NULL
};
/*
* Reverse a graphics character, or return unaltered if no mirror;
* should do alphanumerics too, but I'm too lazy. <cshenton@it.hq.nasa.gov>
*/
static u_char
xflip_symbol(u_char symbol)
{
static const u_char lchars[] = "`'(){}[]\\/<>";
static const u_char rchars[] = "'`)(}{][/\\><";
int pos;
for (pos = 0; lchars[pos] != '\0'; pos++)
if (lchars[pos] == symbol)
return rchars[pos];
return symbol;
}
static void
clear_daemon(sc_softc_t *sc, int xpos, int ypos, int dxdir, int xoff, int yoff,
int xlen, int ylen)
{
int y;
if (xlen <= 0)
return;
for (y = yoff; y < ylen; y++) {
sc_vtb_erase(&sc->cur_scp->scr,
(ypos + y)*sc->cur_scp->xsize + xpos + xoff,
xlen - xoff,
sc->scr_map[0x20], ATTR(FG_LIGHTGREY | BG_BLACK));
}
}
static void
draw_daemon(sc_softc_t *sc, int xpos, int ypos, int dxdir, int xoff, int yoff,
int xlen, int ylen)
{
int x, y;
int px;
int attr;
for (y = yoff; y < ylen; y++) {
if (dxdir < 0)
px = xoff;
else
px = DAEMON_MAX_WIDTH - xlen;
if (px >= strlen(daemon_pic[y]))
continue;
for (x = xoff; (x < xlen) && (daemon_pic[y][px] != '\0'); x++, px++) {
switch (daemon_attr[y][px]) {
case 'R': attr = FG_LIGHTRED | BG_BLACK; break;
case 'Y': attr = FG_YELLOW | BG_BLACK; break;
case 'B': attr = FG_LIGHTBLUE | BG_BLACK; break;
case 'W': attr = FG_LIGHTGREY | BG_BLACK; break;
case 'C': attr = FG_CYAN | BG_BLACK; break;
default: attr = FG_WHITE | BG_BLACK; break;
}
if (dxdir < 0) { /* Moving left */
sc_vtb_putc(&sc->cur_scp->scr,
(ypos + y)*sc->cur_scp->xsize
+ xpos + x,
sc->scr_map[daemon_pic[y][px]],
ATTR(attr));
} else { /* Moving right */
sc_vtb_putc(&sc->cur_scp->scr,
(ypos + y)*sc->cur_scp->xsize
+ xpos + DAEMON_MAX_WIDTH
- px - 1,
sc->scr_map[xflip_symbol(daemon_pic[y][px])],
ATTR(attr));
}
}
}
}
static void
clear_string(sc_softc_t *sc, int xpos, int ypos, int xoff, char *s, int len)
{
if (len <= 0)
return;
sc_vtb_erase(&sc->cur_scp->scr,
ypos*sc->cur_scp->xsize + xpos + xoff, len - xoff,
sc->scr_map[0x20], ATTR(FG_LIGHTGREY | BG_BLACK));
}
static void
draw_string(sc_softc_t *sc, int xpos, int ypos, int xoff, u_char *s, int len)
{
int x;
for (x = xoff; x < len; x++)
sc_vtb_putc(&sc->cur_scp->scr,
ypos*sc->cur_scp->xsize + xpos + x,
sc->scr_map[s[x]], ATTR(FG_LIGHTGREEN | BG_BLACK));
}
static int
daemon_saver(video_adapter_t *adp, int blank)
{
static int txpos = 10, typos = 10;
static int txdir = -1, tydir = -1;
static int dxpos = 0, dypos = 0;
static int dxdir = 1, dydir = 1;
static int moved_daemon = 0;
static int xoff, yoff, toff;
static int xlen, ylen, tlen;
sc_softc_t *sc;
scr_stat *scp;
int min, max;
sc = sc_find_softc(adp, NULL);
if (sc == NULL)
return EAGAIN;
scp = sc->cur_scp;
if (blank) {
if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
return EAGAIN;
if (blanked == 0) {
/* clear the screen and set the border color */
sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
ATTR(FG_LIGHTGREY | BG_BLACK));
vidd_set_hw_cursor(adp, -1, -1);
sc_set_border(scp, 0);
xlen = ylen = tlen = 0;
}
if (blanked++ < 2)
return 0;
blanked = 1;
clear_daemon(sc, dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
clear_string(sc, txpos, typos, toff, message, tlen);
if (++moved_daemon) {
/*
* The daemon picture may be off the screen, if
* screen size is chagened while the screen
* saver is inactive. Make sure the origin of
* the picture is between min and max.
*/
if (scp->xsize <= DAEMON_MAX_WIDTH) {
/*
* If the screen width is too narrow, we
* allow part of the picture go off
* the screen so that the daemon won't
* flip too often.
*/
min = scp->xsize - DAEMON_MAX_WIDTH - 10;
max = 10;
} else {
min = 0;
max = scp->xsize - DAEMON_MAX_WIDTH;
}
if (dxpos <= min) {
dxpos = min;
dxdir = 1;
} else if (dxpos >= max) {
dxpos = max;
dxdir = -1;
}
if (scp->ysize <= DAEMON_MAX_HEIGHT) {
min = scp->ysize - DAEMON_MAX_HEIGHT - 10;
max = 10;
} else {
min = 0;
max = scp->ysize - DAEMON_MAX_HEIGHT;
}
if (dypos <= min) {
dypos = min;
dydir = 1;
} else if (dypos >= max) {
dypos = max;
dydir = -1;
}
moved_daemon = -1;
dxpos += dxdir; dypos += dydir;
/* clip the picture */
xoff = 0;
xlen = DAEMON_MAX_WIDTH;
if (dxpos + xlen <= 0)
xlen = 0;
else if (dxpos < 0)
xoff = -dxpos;
if (dxpos >= scp->xsize)
xlen = 0;
else if (dxpos + xlen > scp->xsize)
xlen = scp->xsize - dxpos;
yoff = 0;
ylen = DAEMON_MAX_HEIGHT;
if (dypos + ylen <= 0)
ylen = 0;
else if (dypos < 0)
yoff = -dypos;
if (dypos >= scp->ysize)
ylen = 0;
else if (dypos + ylen > scp->ysize)
ylen = scp->ysize - dypos;
}
if (scp->xsize <= messagelen) {
min = scp->xsize - messagelen - 10;
max = 10;
} else {
min = 0;
max = scp->xsize - messagelen;
}
if (txpos <= min) {
txpos = min;
txdir = 1;
} else if (txpos >= max) {
txpos = max;
txdir = -1;
}
if (typos <= 0) {
typos = 0;
tydir = 1;
} else if (typos >= scp->ysize - 1) {
typos = scp->ysize - 1;
tydir = -1;
}
txpos += txdir; typos += tydir;
toff = 0;
tlen = messagelen;
if (txpos + tlen <= 0)
tlen = 0;
else if (txpos < 0)
toff = -txpos;
if (txpos >= scp->xsize)
tlen = 0;
else if (txpos + tlen > scp->xsize)
tlen = scp->xsize - txpos;
draw_daemon(sc, dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
draw_string(sc, txpos, typos, toff, message, tlen);
} else
blanked = 0;
return 0;
}
static int
daemon_init(video_adapter_t *adp)
{
size_t hostlen;
mtx_lock(&prison0.pr_mtx);
for (;;) {
hostlen = strlen(prison0.pr_hostname);
mtx_unlock(&prison0.pr_mtx);
messagelen = hostlen + 3 + strlen(ostype) + 1 +
strlen(osrelease);
message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK);
mtx_lock(&prison0.pr_mtx);
if (hostlen < strlen(prison0.pr_hostname)) {
free(message, M_DEVBUF);
continue;
}
break;
}
sprintf(message, "%s - %s %s", prison0.pr_hostname, ostype, osrelease);
mtx_unlock(&prison0.pr_mtx);
blanked = 0;
attr_mask = ~0;
return 0;
}
static int
daemon_term(video_adapter_t *adp)
{
free(message, M_DEVBUF);
return 0;
}
static scrn_saver_t daemon_module = {
"daemon_saver", daemon_init, daemon_term, daemon_saver, NULL,
};
SAVER_MODULE(daemon_saver, daemon_module);
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