freebsd-dev/sys/dev/syscons/daemon/daemon_saver.c

361 lines
8.9 KiB
C

/*-
* Copyright (c) 1997 Sandro Sigala, Brescia, Italy.
* Copyright (c) 1997 Chris Shenton
* Copyright (c) 1995 S ren 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.
*
* $Id: daemon_saver.c,v 1.11 1998/09/17 19:40:30 sos Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <machine/md_var.h>
#include <machine/pc/display.h>
#include <saver.h>
#define CONSOLE_VECT(x, y) \
(window + (y)*cur_console->xsize + (x))
#define DAEMON_MAX_WIDTH 32
#define DAEMON_MAX_HEIGHT 19
static char *message;
static int messagelen;
static u_short *window;
/* Who is the author of this ASCII pic? */
static char *daemon_pic[] = {
" , ,",
" /( )`",
" \\ \\___ / |",
" /- _ `-/ '",
" (/\\/ \\ \\ /\\",
" / / | ` \\",
" O O ) / |",
" `-^--'`< '",
" (_.) _ ) /",
" `.___/` /",
" `-----' /",
"<----. __ / __ \\",
"<----|====O)))==) \\) /====",
"<----' `--' `.__,' \\",
" | |",
" \\ / /\\",
" ______( (_ / \\______/",
" ,' ,-----' |",
" `--{__________)",
NULL
};
static 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 char
xflip_symbol(char symbol)
{
static const char lchars[] = "`'(){}[]\\/<>";
static const char rchars[] = "'`)(}{][/\\><";
int pos;
for (pos = 0; lchars[pos] != '\0'; pos++)
if (lchars[pos] == symbol)
return rchars[pos];
return symbol;
}
static void
clear_daemon(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++)
fillw(((FG_LIGHTGREY|BG_BLACK) << 8) | scr_map[0x20],
CONSOLE_VECT(xpos + xoff, ypos + y), xlen - xoff);
}
static void
draw_daemon(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)<<8; break;
case 'Y': attr = (FG_YELLOW|BG_BLACK)<<8; break;
case 'B': attr = (FG_LIGHTBLUE|BG_BLACK)<<8; break;
case 'W': attr = (FG_LIGHTGREY|BG_BLACK)<<8; break;
case 'C': attr = (FG_CYAN|BG_BLACK)<<8; break;
default: attr = (FG_WHITE|BG_BLACK)<<8; break;
}
if (dxdir < 0) { /* Moving left */
*CONSOLE_VECT(xpos + x, ypos + y) =
scr_map[daemon_pic[y][px]]|attr;
} else { /* Moving right */
*CONSOLE_VECT(xpos + DAEMON_MAX_WIDTH - px - 1, ypos + y) =
scr_map[xflip_symbol(daemon_pic[y][px])]|attr;
}
}
}
}
static void
clear_string(int xpos, int ypos, int xoff, char *s, int len)
{
if (len <= 0)
return;
fillw(((FG_LIGHTGREY|BG_BLACK) << 8) | scr_map[0x20],
CONSOLE_VECT(xpos + xoff, ypos), len - xoff);
}
static void
draw_string(int xpos, int ypos, int xoff, char *s, int len)
{
int x;
for (x = xoff; x < len; x++)
*CONSOLE_VECT(xpos + x, ypos) =
scr_map[s[x]]|(FG_LIGHTGREEN|BG_BLACK)<<8;
}
static void
daemon_saver(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;
scr_stat *scp = cur_console;
int min, max;
if (blank) {
if (!ISTEXTSC(scp))
return;
if (scrn_blanked == 0) {
scp->status |= SAVER_RUNNING;
window = (u_short *)(*biosvidsw.adapter)(scp->adp)->va_window;
/* clear the screen and set the border color */
fillw(((FG_LIGHTGREY|BG_BLACK) << 8) | scr_map[0x20],
window, scp->xsize * scp->ysize);
set_border(scp, 0);
xlen = ylen = tlen = 0;
}
if (scrn_blanked++ < 2)
return;
scrn_blanked = 1;
clear_daemon(dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
clear_string(txpos, typos, toff, (char *)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(dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
draw_string(txpos, typos, toff, (char *)message, tlen);
} else {
if (scrn_blanked > 0) {
set_border(scp, scp->border);
scrn_blanked = 0;
scp->status &= ~SAVER_RUNNING;
}
}
}
static int
daemon_saver_load(void)
{
int err;
messagelen = strlen(hostname) + 3 + strlen(ostype) + 1 +
strlen(osrelease);
message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK);
sprintf(message, "%s - %s %s", hostname, ostype, osrelease);
err = add_scrn_saver(daemon_saver);
if (err != 0)
free(message, M_DEVBUF);
return err;
}
static int
daemon_saver_unload(void)
{
int err;
err = remove_scrn_saver(daemon_saver);
if (err == 0)
free(message, M_DEVBUF);
return err;
}
SAVER_MODULE(daemon_saver);