172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*-
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* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/syslog.h>
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#include <sys/consio.h>
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#include <sys/fbio.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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#include <dev/syscons/syscons.h>
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#define SAVER_NAME "rain_saver"
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#define MAX 63 /* number of colors (in addition to black) */
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#define INCREMENT 4 /* increment between colors */
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#define RED(n) ((n) * 3 + 0)
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#define GREEN(n) ((n) * 3 + 1)
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#define BLUE(n) ((n) * 3 + 2)
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static u_char *vid;
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static int banksize, scrmode, bpsl, scrw, scrh;
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static u_char rain_pal[768];
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static int blanked;
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static void
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rain_update(video_adapter_t *adp)
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{
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int i, t;
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t = rain_pal[BLUE(MAX)];
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for (i = MAX; i > 1; i--)
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rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)];
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rain_pal[BLUE(1)] = t;
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load_palette(adp, rain_pal);
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}
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static int
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rain_saver(video_adapter_t *adp, int blank)
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{
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int i, j, k, o, p, pl;
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u_char temp;
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if (blank) {
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/* switch to graphics mode */
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if (blanked <= 0) {
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pl = splhigh();
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set_video_mode(adp, scrmode);
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load_palette(adp, rain_pal);
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set_border(adp, 0);
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blanked++;
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vid = (u_char *)adp->va_window;
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banksize = adp->va_window_size;
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bpsl = adp->va_line_width;
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splx(pl);
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for (i = 0; i < bpsl*scrh; i += banksize) {
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set_origin(adp, i);
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if ((bpsl * scrh - i) < banksize)
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bzero(vid, bpsl * scrh - i);
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else
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bzero(vid, banksize);
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}
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set_origin(adp, 0);
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for (i = 0, o = 0, p = 0; i < scrw; i += 2, p += 2) {
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if (p > banksize) {
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p -= banksize;
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o += banksize;
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set_origin(adp, o);
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}
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vid[p] = 1 + (random() % MAX);
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}
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o = 0; p = 0;
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for (j = 1; j < scrh; j++)
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for (i = 0, p = bpsl * (j - 1) - o; i < scrw; i += 2, p+= 2) {
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while (p > banksize) {
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p -= banksize;
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o += banksize;
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}
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set_origin(adp, o);
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temp = (vid[p] < MAX) ? 1 + vid[p] : 1;
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if (p + bpsl < banksize) {
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vid[p + bpsl] = temp;
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} else {
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set_origin(adp, o + banksize);
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vid[p + bpsl - banksize] = temp;
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}
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}
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}
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/* update display */
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rain_update(adp);
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} else {
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blanked = 0;
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}
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return (0);
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}
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static int
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rain_init(video_adapter_t *adp)
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{
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video_info_t info;
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int i;
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if (!get_mode_info(adp, M_VGA_CG320, &info)) {
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scrmode = M_VGA_CG320;
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} else if (!get_mode_info(adp, M_PC98_PEGC640x480, &info)) {
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scrmode = M_PC98_PEGC640x480;
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} else if (!get_mode_info(adp, M_PC98_PEGC640x400, &info)) {
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scrmode = M_PC98_PEGC640x400;
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} else {
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log(LOG_NOTICE,
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"%s: the console does not support M_VGA_CG320\n",
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SAVER_NAME);
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return (ENODEV);
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}
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scrw = info.vi_width;
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scrh = info.vi_height;
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/* intialize the palette */
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for (i = 1; i < MAX; i++)
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rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT;
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return (0);
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}
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static int
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rain_term(video_adapter_t *adp)
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{
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return (0);
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}
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static scrn_saver_t rain_module = {
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SAVER_NAME,
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rain_init,
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rain_term,
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rain_saver,
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NULL
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};
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SAVER_MODULE(rain_saver, rain_module);
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