137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
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/*-
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* Copyright (c) 1998 Dag-Erling Co<EFBFBD>dan Sm<EFBFBD>rgrav
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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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* $Id$
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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 <machine/md_var.h>
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#include <machine/random.h>
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#include <saver.h>
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static u_char *vid;
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#define SCRW 320
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#define SCRH 200
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#define MAX 63
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static u_char save_pal[768];
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static u_char rain_pal[768];
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static void
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rain_update(void)
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{
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int i, t;
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t = rain_pal[(MAX*3+2)];
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for (i = (MAX*3+2); i > 5; i -= 3)
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rain_pal[i] = rain_pal[i-3];
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rain_pal[5] = t;
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load_palette(cur_console, rain_pal);
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}
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static void
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rain_saver(int blank)
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{
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scr_stat *scp = cur_console;
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static int saved_mode;
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int i, j, k, pl;
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if (blank) {
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/* switch to graphics mode */
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if (scrn_blanked <= 0) {
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pl = splhigh();
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saved_mode = scp->mode;
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scp->mode = M_VGA_CG320;
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scp->status |= SAVER_RUNNING|GRAPHICS_MODE;
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save_palette(scp, save_pal);
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set_mode(scp);
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load_palette(scp, rain_pal);
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scrn_blanked++;
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vid = (u_char *)Crtat;
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splx(pl);
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bzero(vid, SCRW*SCRH);
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for (i = 0; i < SCRW; i += 2)
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vid[i] = 1 + (random() % MAX);
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for (j = 1, k = SCRW; j < SCRH; j++)
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for (i = 0; i < SCRW; i += 2, k += 2)
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vid[k] = (vid[k-SCRW] < MAX) ? 1 + vid[k-SCRW] : 1;
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}
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/* update display */
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rain_update();
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} else {
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/* return to previous video mode */
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if (scrn_blanked > 0) {
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if (saved_mode) {
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pl = splhigh();
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scrn_blanked = 0;
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scp->mode = saved_mode;
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scp->status &= ~(SAVER_RUNNING|GRAPHICS_MODE);
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set_mode(scp);
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load_palette(scp, save_pal);
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saved_mode = 0;
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splx(pl);
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}
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}
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}
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}
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static int
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rain_saver_load(void)
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{
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video_info_t info;
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int i;
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/* check that the console is capable of running in 320x200x256 */
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if ((*biosvidsw.get_info)(cur_console->adp, M_VGA_CG320, &info)) {
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log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n");
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return ENODEV;
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}
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/* intialize the palette */
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for (i = 3; i < (MAX+1)*3; i += 3)
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rain_pal[i+2] = rain_pal[i-1] + 4;
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return add_scrn_saver(rain_saver);
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}
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static int
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rain_saver_unload(void)
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{
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return remove_scrn_saver(rain_saver);
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}
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SAVER_MODULE(rain_saver);
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