1 /*- 2 * Copyright (c) 1995 S�ren Schmidt 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 * in this position and unchanged. 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id: fade_saver.c,v 1.3 1995/10/28 12:35:10 peter Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/conf.h> 34 #include <sys/exec.h> 35 #include <sys/sysent.h> 36 #include <sys/lkm.h> 37 #include <sys/errno.h> 38 #include <saver.h> 39 40 MOD_MISC("fade_saver") 41 42 void (*current_saver)(); 43 void (*old_saver)(); 44 45 static void 46 fade_saver(int blank) 47 { 48 static int count = 0; 49 int i; 50 51 if (blank) { 52 scrn_blanked = 1; 53 if (count < 64) { 54 outb(PIXMASK, 0xFF); /* no pixelmask */ 55 outb(PALWADR, 0x00); 56 outb(PALDATA, 0); 57 outb(PALDATA, 0); 58 outb(PALDATA, 0); 59 for (i = 3; i < 768; i++) { 60 if (palette[i] - count > 15) 61 outb(PALDATA, palette[i]-count); 62 else 63 outb(PALDATA, 15); 64 } 65 inb(crtc_addr+6); /* reset flip/flop */ 66 outb(ATC, 0x20); /* enable palette */ 67 count++; 68 } 69 } 70 else { 71 load_palette(); 72 count = scrn_blanked = 0; 73 } 74 } 75 76 fade_saver_load(struct lkm_table *lkmtp, int cmd) 77 { 78 (*current_saver)(0); 79 old_saver = current_saver; 80 current_saver = fade_saver; 81 uprintf("fade screen saver installed\n"); 82 return 0; 83 } 84 85 fade_saver_unload(struct lkm_table *lkmtp, int cmd) 86 { 87 (*current_saver)(0); 88 current_saver = old_saver; 89 uprintf("fade screen saver removed\n"); 90 return 0; 91 } 92 93 fade_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 94 { 95 DISPATCH(lkmtp, cmd, ver, fade_saver_load, fade_saver_unload, 96 lkm_nullcmd); 97 } 98