1 /*- 2 * Copyright (c) 1999 Brad Forschinger 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* 30 * brad forschinger, 19990504 <retch@flag.blackened.net> 31 * 32 * written with much help from warp_saver.c 33 * 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/syslog.h> 41 #include <sys/consio.h> 42 #include <sys/fbio.h> 43 44 #include <dev/fb/fbreg.h> 45 #include <dev/fb/splashreg.h> 46 #include <dev/syscons/syscons.h> 47 48 #define X_SIZE 320 49 #define Y_SIZE 200 50 51 static int blanked; 52 static u_char fire_pal[768]; 53 static u_char buf[X_SIZE * (Y_SIZE + 1)]; 54 static u_char *vid; 55 56 static int 57 fire_saver(video_adapter_t *adp, int blank) 58 { 59 int x, y; 60 61 if (blank) { 62 if (blanked <= 0) { 63 int red, green, blue; 64 int palette_index; 65 66 set_video_mode(adp, M_VGA_CG320); 67 68 /* build and load palette */ 69 red = green = blue = 0; 70 for (palette_index = 0; palette_index < 256; palette_index++) { 71 red++; 72 if (red > 128) 73 green += 2; 74 75 fire_pal[(palette_index * 3) + 0] = red; 76 fire_pal[(palette_index * 3) + 1] = green; 77 fire_pal[(palette_index * 3) + 2] = blue; 78 } 79 load_palette(adp, fire_pal); 80 81 blanked++; 82 vid = (u_char *) adp->va_window; 83 } 84 /* make a new bottom line */ 85 for (x = 0, y = Y_SIZE; x < X_SIZE; x++) 86 buf[x + (y * X_SIZE)] = random() % 160 + 96; 87 88 /* fade the flames out */ 89 for (y = 0; y < Y_SIZE; y++) { 90 for (x = 0; x < X_SIZE; x++) { 91 buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] + 92 buf[(x - 1) + ((y + 1) * X_SIZE)] + 93 buf[(x + 0) + ((y + 1) * X_SIZE)] + 94 buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4; 95 if (buf[x + (y * X_SIZE)] > 0) 96 buf[x + (y * X_SIZE)]--; 97 } 98 } 99 100 /* blit our buffer into video ram */ 101 memcpy(vid, buf, X_SIZE * Y_SIZE); 102 } else { 103 blanked = 0; 104 } 105 106 return 0; 107 } 108 109 static int 110 fire_initialise(video_adapter_t *adp) 111 { 112 video_info_t info; 113 114 /* check that the console is capable of running in 320x200x256 */ 115 if (get_mode_info(adp, M_VGA_CG320, &info)) { 116 log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n"); 117 return (ENODEV); 118 } 119 blanked = 0; 120 121 return 0; 122 } 123 124 static int 125 fire_terminate(video_adapter_t *adp) 126 { 127 return 0; 128 } 129 130 static scrn_saver_t fire_module = { 131 "fire_saver", fire_initialise, fire_terminate, fire_saver, NULL 132 }; 133 134 SAVER_MODULE(fire_saver, fire_module); 135