| 1 | /*- |
| 2 | * (MPSAFE) |
| 3 | * |
| 4 | * Copyright (c) 1995-1998 Søren Schmidt |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer, |
| 12 | * without modification, immediately at the beginning of the file. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | * |
| 30 | * $FreeBSD: src/sys/modules/syscons/snake/snake_saver.c,v 1.26.2.2 2001/05/06 05:44:29 nyan Exp $ |
| 31 | * $DragonFly: src/sys/dev/misc/syscons/snake/snake_saver.c,v 1.8 2006/12/20 18:14:39 dillon Exp $ |
| 32 | */ |
| 33 | |
| 34 | #include <sys/param.h> |
| 35 | #include <sys/systm.h> |
| 36 | #include <sys/module.h> |
| 37 | #include <sys/malloc.h> |
| 38 | #include <sys/kernel.h> |
| 39 | #include <sys/sysctl.h> |
| 40 | #include <sys/consio.h> |
| 41 | #include <sys/fbio.h> |
| 42 | #include <sys/thread.h> |
| 43 | |
| 44 | #include <machine/pc/display.h> |
| 45 | |
| 46 | #include <dev/video/fb/fbreg.h> |
| 47 | #include <dev/video/fb/splashreg.h> |
| 48 | #include "../syscons.h" |
| 49 | |
| 50 | static u_char *message; |
| 51 | static int *messagep; |
| 52 | static int messagelen; |
| 53 | static int blanked; |
| 54 | |
| 55 | static int |
| 56 | snake_saver(video_adapter_t *adp, int blank) |
| 57 | { |
| 58 | static int dirx, diry; |
| 59 | int f; |
| 60 | sc_softc_t *sc; |
| 61 | scr_stat *scp; |
| 62 | |
| 63 | /* XXX hack for minimal changes. */ |
| 64 | #define save message |
| 65 | #define savs messagep |
| 66 | |
| 67 | |
| 68 | sc = sc_find_softc(adp, NULL); |
| 69 | if (sc == NULL) { |
| 70 | return EAGAIN; |
| 71 | } |
| 72 | scp = sc->cur_scp; |
| 73 | |
| 74 | if (blank) { |
| 75 | if (adp->va_info.vi_flags & V_INFO_GRAPHICS) { |
| 76 | return EAGAIN; |
| 77 | } |
| 78 | if (blanked <= 0) { |
| 79 | sc_vtb_clear(&scp->scr, sc->scr_map[0x20], |
| 80 | (FG_LIGHTGREY | BG_BLACK) << 8); |
| 81 | (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1); |
| 82 | sc_set_border(scp, 0); |
| 83 | dirx = (scp->xpos ? 1 : -1); |
| 84 | diry = (scp->ypos ? |
| 85 | scp->xsize : -scp->xsize); |
| 86 | for (f=0; f< messagelen; f++) |
| 87 | savs[f] = scp->xpos + scp->ypos*scp->xsize; |
| 88 | sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save], |
| 89 | (FG_LIGHTGREY | BG_BLACK) << 8); |
| 90 | blanked = 1; |
| 91 | } |
| 92 | if (blanked++ < 4) { |
| 93 | return 0; |
| 94 | } |
| 95 | blanked = 1; |
| 96 | sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20], |
| 97 | (FG_LIGHTGREY | BG_BLACK) << 8); |
| 98 | for (f=messagelen-1; f > 0; f--) |
| 99 | savs[f] = savs[f-1]; |
| 100 | f = savs[0]; |
| 101 | if ((f % scp->xsize) == 0 || |
| 102 | (f % scp->xsize) == scp->xsize - 1 || |
| 103 | (krandom() % 50) == 0) |
| 104 | dirx = -dirx; |
| 105 | if ((f / scp->xsize) == 0 || |
| 106 | (f / scp->xsize) == scp->ysize - 1 || |
| 107 | (krandom() % 20) == 0) |
| 108 | diry = -diry; |
| 109 | savs[0] += dirx + diry; |
| 110 | for (f=messagelen-1; f>=0; f--) |
| 111 | sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]], |
| 112 | (FG_LIGHTGREY | BG_BLACK) << 8); |
| 113 | } else { |
| 114 | blanked = 0; |
| 115 | } |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int |
| 121 | snake_init(video_adapter_t *adp) |
| 122 | { |
| 123 | messagelen = strlen(ostype) + 1 + strlen(osrelease); |
| 124 | message = kmalloc(messagelen + 1, M_SYSCONS, M_WAITOK); |
| 125 | ksprintf(message, "%s %s", ostype, osrelease); |
| 126 | messagep = kmalloc(messagelen * sizeof *messagep, M_SYSCONS, M_WAITOK); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static int |
| 131 | snake_term(video_adapter_t *adp) |
| 132 | { |
| 133 | kfree(message, M_SYSCONS); |
| 134 | kfree(messagep, M_SYSCONS); |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | static scrn_saver_t snake_module = { |
| 139 | "snake_saver", snake_init, snake_term, snake_saver, NULL, |
| 140 | }; |
| 141 | |
| 142 | SAVER_MODULE(snake_saver, snake_module); |