diff options
Diffstat (limited to 'sys/dev/syscons/rain')
| -rw-r--r-- | sys/dev/syscons/rain/rain_saver.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/dev/syscons/rain/rain_saver.c b/sys/dev/syscons/rain/rain_saver.c new file mode 100644 index 000000000000..395313716dbc --- /dev/null +++ b/sys/dev/syscons/rain/rain_saver.c @@ -0,0 +1,181 @@ +/*- + * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav + * 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * 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/kernel.h> +#include <sys/module.h> +#include <sys/syslog.h> +#include <sys/consio.h> +#include <sys/fbio.h> + +#include <dev/fb/fbreg.h> +#include <dev/fb/splashreg.h> +#include <dev/syscons/syscons.h> + +#define SAVER_NAME "rain_saver" +#ifdef MAX +#undef MAX +#endif +#define MAX 63 /* number of colors (in addition to black) */ +#define INCREMENT 4 /* increment between colors */ + +#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 *vid; +static int banksize, scrmode, bpsl, scrw, scrh; +static u_char rain_pal[768]; +static int blanked; + +static void +rain_update(video_adapter_t *adp) +{ + int i, t; + + t = rain_pal[BLUE(MAX)]; + for (i = MAX; i > 1; i--) + rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)]; + rain_pal[BLUE(1)] = t; + vidd_load_palette(adp, rain_pal); +} + +static int +rain_saver(video_adapter_t *adp, int blank) +{ + int i, j, o, p, pl; + u_char temp; + int last_origin = -1; + + if (blank) { + /* switch to graphics mode */ + if (blanked <= 0) { + pl = splhigh(); + vidd_set_mode(adp, scrmode); + vidd_load_palette(adp, rain_pal); + vidd_set_border(adp, 0); + blanked++; + vid = (u_char *)adp->va_window; + banksize = adp->va_window_size; + bpsl = adp->va_line_width; + splx(pl); + for (i = 0; i < bpsl*scrh; i += banksize) { + SET_ORIGIN(adp, i); + if ((bpsl * scrh - i) < banksize) + bzero(vid, bpsl * scrh - i); + else + bzero(vid, banksize); + } + SET_ORIGIN(adp, 0); + for (i = 0, o = 0, p = 0; i < scrw; i += 2, p += 2) { + if (p > banksize) { + p -= banksize; + o += banksize; + SET_ORIGIN(adp, o); + } + vid[p] = 1 + (random() % MAX); + } + o = 0; p = 0; + for (j = 1; j < scrh; j++) + for (i = 0, p = bpsl * (j - 1) - o; i < scrw; i += 2, p+= 2) { + while (p > banksize) { + p -= banksize; + o += banksize; + } + SET_ORIGIN(adp, o); + temp = (vid[p] < MAX) ? 1 + vid[p] : 1; + if (p + bpsl < banksize) { + vid[p + bpsl] = temp; + } else { + SET_ORIGIN(adp, o + banksize); + vid[p + bpsl - banksize] = temp; + } + } + } + + /* update display */ + rain_update(adp); + } else { + blanked = 0; + } + return (0); +} + +static int +rain_init(video_adapter_t *adp) +{ + video_info_t info; + int i; + + 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; + + /* intialize the palette */ + for (i = 1; i < MAX; i++) + rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT; + + return (0); +} + +static int +rain_term(video_adapter_t *adp) +{ + return (0); +} + +static scrn_saver_t rain_module = { + SAVER_NAME, + rain_init, + rain_term, + rain_saver, + NULL +}; + +SAVER_MODULE(rain_saver, rain_module); |