diff options
Diffstat (limited to 'sys/dev/syscons/fire')
| -rw-r--r-- | sys/dev/syscons/fire/fire_saver.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/sys/dev/syscons/fire/fire_saver.c b/sys/dev/syscons/fire/fire_saver.c new file mode 100644 index 000000000000..4c995efcd640 --- /dev/null +++ b/sys/dev/syscons/fire/fire_saver.c @@ -0,0 +1,199 @@ +/*- + * Copyright (c) 1999 Brad Forschinger + * 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, + * without modification, immediately at the beginning of the file. + * 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. + * + * $FreeBSD$ + */ + +/* + * brad forschinger, 19990504 <retch@flag.blackened.net> + * + * written with much help from warp_saver.c + * + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/syslog.h> +#include <sys/consio.h> +#include <sys/malloc.h> +#include <sys/fbio.h> + +#include <dev/fb/fbreg.h> +#include <dev/fb/splashreg.h> +#include <dev/syscons/syscons.h> + +#define SAVER_NAME "fire_saver" + +#define RED(n) ((n) * 3 + 0) +#define GREEN(n) ((n) * 3 + 1) +#define BLUE(n) ((n) * 3 + 2) + +#define SET_ORIGIN(adp, o) do { \ + int oo = o; \ + if (oo != last_origin) \ + vidd_set_win_org(adp, last_origin = oo); \ + } while (0) + +static u_char *buf; +static u_char *vid; +static int banksize, scrmode, bpsl, scrw, scrh; +static u_char fire_pal[768]; +static int blanked; + +static void +fire_update(video_adapter_t *adp) +{ + int x, y; + int o, p; + int last_origin = -1; + + /* make a new bottom line */ + for (x = 0, y = scrh; x < scrw; x++) + buf[x + (y * bpsl)] = random() % 160 + 96; + + /* fade the flames out */ + for (y = 0; y < scrh; y++) { + for (x = 0; x < scrw; x++) { + buf[x + (y * scrw)] = + (buf[(x + 0) + ((y + 0) * scrw)] + + buf[(x - 1) + ((y + 1) * scrw)] + + buf[(x + 0) + ((y + 1) * scrw)] + + buf[(x + 1) + ((y + 1) * scrw)]) / 4; + if (buf[x + (y * scrw)] > 0) + buf[x + (y * scrw)]--; + } + } + + /* blit our buffer into video ram */ + for (y = 0, p = 0, o = 0; y < scrh; y++, p += bpsl) { + while (p > banksize) { + p -= banksize; + o += banksize; + } + SET_ORIGIN(adp, o); + if (p + scrw < banksize) { + bcopy(buf + y * scrw, vid + p, scrw); + } else { + bcopy(buf + y * scrw, vid + p, banksize - p); + SET_ORIGIN(adp, o + banksize); + bcopy(buf + y * scrw + (banksize - p), vid, + scrw - (banksize - p)); + p -= banksize; + o += banksize; + } + } + +} + +static int +fire_saver(video_adapter_t *adp, int blank) +{ + int pl; + + if (blank) { + /* switch to graphics mode */ + if (blanked <= 0) { + pl = splhigh(); + vidd_set_mode(adp, scrmode); + vidd_load_palette(adp, fire_pal); + blanked++; + vid = (u_char *)adp->va_window; + banksize = adp->va_window_size; + bpsl = adp->va_line_width; + splx(pl); + vidd_clear(adp); + } + fire_update(adp); + } else { + blanked = 0; + } + + return 0; +} + +static int +fire_init(video_adapter_t *adp) +{ + video_info_t info; + int i, red, green, blue; + + if (!vidd_get_info(adp, M_VGA_CG320, &info)) { + scrmode = M_VGA_CG320; + } else if (!vidd_get_info(adp, M_PC98_PEGC640x480, &info)) { + scrmode = M_PC98_PEGC640x480; + } else if (!vidd_get_info(adp, M_PC98_PEGC640x400, &info)) { + scrmode = M_PC98_PEGC640x400; + } else { + log(LOG_NOTICE, + "%s: the console does not support M_VGA_CG320\n", + SAVER_NAME); + return (ENODEV); + } + + scrw = info.vi_width; + scrh = info.vi_height; + + buf = (u_char *)malloc(scrw * (scrh + 1), M_DEVBUF, M_NOWAIT); + if (buf) { + bzero(buf, scrw * (scrh + 1)); + } else { + log(LOG_NOTICE, + "%s: buffer allocation is failed\n", + SAVER_NAME); + return (ENODEV); + } + + /* intialize the palette */ + red = green = blue = 0; + for (i = 0; i < 256; i++) { + red++; + if (red > 128) + green += 2; + fire_pal[RED(i)] = red; + fire_pal[GREEN(i)] = green; + fire_pal[BLUE(i)] = blue; + } + + return (0); +} + +static int +fire_term(video_adapter_t *adp) +{ + free(buf, M_DEVBUF); + return (0); +} + +static scrn_saver_t fire_module = { + SAVER_NAME, + fire_init, + fire_term, + fire_saver, + NULL +}; + +SAVER_MODULE(fire_saver, fire_module); |