diff options
Diffstat (limited to 'lkm/syscons/snake/snake_saver.c')
| -rw-r--r-- | lkm/syscons/snake/snake_saver.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/lkm/syscons/snake/snake_saver.c b/lkm/syscons/snake/snake_saver.c new file mode 100644 index 0000000..1974980 --- /dev/null +++ b/lkm/syscons/snake/snake_saver.c @@ -0,0 +1,121 @@ +/*- + * Copyright (c) 1995 Søren Schmidt + * 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 withough 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. + * + * $Id$ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/exec.h> +#include <sys/sysent.h> +#include <sys/lkm.h> +#include <sys/errno.h> +#include <saver.h> + +MOD_MISC("snake_saver") + +void (*current_saver)(); +void (*old_saver)(); + +static void +snake_saver(int blank) +{ + const char saves[] = {"FreeBSD-2.1"}; + static u_char *savs[sizeof(saves)-1]; + static int dirx, diry; + int f; + scr_stat *scp = cur_console; + + if (blank) { + if (!scrn_blanked) { + fillw((FG_LIGHTGREY|BG_BLACK)<<8 | scr_map[0x20], + Crtat, scp->xsize * scp->ysize); + set_border(0); + dirx = (scp->xpos ? 1 : -1); + diry = (scp->ypos ? + scp->xsize : -scp->xsize); + for (f=0; f< sizeof(saves)-1; f++) + savs[f] = (u_char *)Crtat + 2 * + (scp->xpos+scp->ypos*scp->xsize); + *(savs[0]) = scr_map[*saves]; + f = scp->ysize * scp->xsize + 5; + outb(crtc_addr, 14); + outb(crtc_addr+1, f >> 8); + outb(crtc_addr, 15); + outb(crtc_addr+1, f & 0xff); + scrn_blanked = 1; + } + if (scrn_blanked++ < 4) + return; + scrn_blanked = 1; + *(savs[sizeof(saves)-2]) = scr_map[0x20]; + for (f=sizeof(saves)-2; f > 0; f--) + savs[f] = savs[f-1]; + f = (savs[0] - (u_char *)Crtat) / 2; + if ((f % scp->xsize) == 0 || + (f % scp->xsize) == scp->xsize - 1 || + (random() % 50) == 0) + dirx = -dirx; + if ((f / scp->xsize) == 0 || + (f / scp->xsize) == scp->ysize - 1 || + (random() % 20) == 0) + diry = -diry; + savs[0] += 2*dirx + 2*diry; + for (f=sizeof(saves)-2; f>=0; f--) + *(savs[f]) = scr_map[saves[f]]; + } + else { + if (scrn_blanked) { + set_border(scp->border); + scrn_blanked = 0; + scp->status |= UPDATE_SCREEN; + } + } +} + +saver_load(struct lkm_table *lkmtp, int cmd) +{ + (*current_saver)(0); + old_saver = current_saver; + current_saver = snake_saver; + uprintf("snake screen saver installed\n"); + return 0; +} + +saver_unload(struct lkm_table *lkmtp, int cmd) +{ + (*current_saver)(0); + current_saver = old_saver; + uprintf("snake screen saver removed\n"); + return 0; +} + +saver_init(struct lkm_table *lkmtp, int cmd, int ver) +{ + DISPATCH(lkmtp, cmd, ver, saver_load, saver_unload, nosys); +} |
