125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*-
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* Copyright (c) 1995-1998 Søren Schmidt
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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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* without modification, immediately at the beginning of the file.
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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: snake_saver.c,v 1.21 1999/01/11 03:18:52 yokota Exp $
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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/module.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <machine/md_var.h>
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#include <machine/pc/display.h>
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#include <saver.h>
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static char *message;
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static u_char **messagep;
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static int messagelen;
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static u_short *window;
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static int blanked;
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static int
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snake_saver(video_adapter_t *adp, int blank)
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{
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static int dirx, diry;
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int f;
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scr_stat *scp = cur_console;
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/* XXX hack for minimal changes. */
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#define save message
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#define savs messagep
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if (blank) {
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if (adp->va_mode_flags & V_INFO_GRAPHICS)
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return EAGAIN;
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if (blanked <= 0) {
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window = (u_short *)adp->va_window;
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fillw(((FG_LIGHTGREY|BG_BLACK)<<8) | scr_map[0x20],
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window, scp->xsize * scp->ysize);
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set_border(scp, 0);
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dirx = (scp->xpos ? 1 : -1);
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diry = (scp->ypos ?
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scp->xsize : -scp->xsize);
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for (f=0; f< messagelen; f++)
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savs[f] = (u_char *)window + 2 *
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(scp->xpos+scp->ypos*scp->xsize);
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*(savs[0]) = scr_map[*save];
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blanked = 1;
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}
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if (blanked++ < 4)
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return 0;
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blanked = 1;
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*(savs[messagelen-1]) = scr_map[0x20];
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for (f=messagelen-1; f > 0; f--)
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savs[f] = savs[f-1];
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f = (savs[0] - (u_char *)window) / 2;
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if ((f % scp->xsize) == 0 ||
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(f % scp->xsize) == scp->xsize - 1 ||
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(random() % 50) == 0)
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dirx = -dirx;
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if ((f / scp->xsize) == 0 ||
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(f / scp->xsize) == scp->ysize - 1 ||
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(random() % 20) == 0)
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diry = -diry;
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savs[0] += 2*dirx + 2*diry;
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for (f=messagelen-1; f>=0; f--)
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*(savs[f]) = scr_map[save[f]];
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}
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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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snake_init(video_adapter_t *adp)
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{
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messagelen = strlen(ostype) + 1 + strlen(osrelease);
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message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK);
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sprintf(message, "%s %s", ostype, osrelease);
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messagep = malloc(messagelen * sizeof *messagep, M_DEVBUF, M_WAITOK);
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return 0;
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}
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static int
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snake_term(video_adapter_t *adp)
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{
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free(message, M_DEVBUF);
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free(messagep, M_DEVBUF);
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return 0;
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}
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static scrn_saver_t snake_module = {
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"snake_saver", snake_init, snake_term, snake_saver, NULL,
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};
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SAVER_MODULE(snake_saver, snake_module);
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