0de89efe5c
savers are also modified so that they behave in the same way as the blank saver on MDA and CGA, although it's not the way these screen savers are supposed to work, but fading monitor and tickling green monitor cannot be done on MDA and CGA, AFAIK. So, this is the second best solution. As of this change, the current state of support of screen savers is summarized in the following table. MDA CGA EGA VGA blank OK OK NA OK daemon OK OK OK OK fade * * NA OK green * * NA OK snake OK OK OK OK star OK OK OK OK OK: works NA: doesn't work, the module cannot be loaded for this adapter. *: behave the same way as the blank saver. As you can see, EGA is left out for now. But, we can do no better, as EGA registers cannot be read... Reviewed by: sos
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*-
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* Copyright (c) 1995-1997 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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* in this position and unchanged.
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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 withough 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: fade_saver.c,v 1.11 1997/07/15 14:49:25 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/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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#include <i386/isa/isa.h>
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#include <saver.h>
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MOD_MISC(fade_saver);
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static void
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fade_saver(int blank)
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{
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static int count = 0;
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int i;
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if (blank) {
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scrn_blanked = 1;
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switch (crtc_type) {
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case KD_VGA:
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if (count < 64) {
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outb(PIXMASK, 0xFF); /* no pixelmask */
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outb(PALWADR, 0x00);
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outb(PALDATA, 0);
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outb(PALDATA, 0);
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outb(PALDATA, 0);
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for (i = 3; i < 768; i++) {
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if (palette[i] - count > 15)
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outb(PALDATA, palette[i]-count);
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else
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outb(PALDATA, 15);
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}
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inb(crtc_addr+6); /* reset flip/flop */
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outb(ATC, 0x20); /* enable palette */
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count++;
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}
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break;
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case KD_EGA:
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/* not yet done XXX */
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break;
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case KD_CGA:
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outb(crtc_addr + 4, 0x25);
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break;
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case KD_MONO:
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case KD_HERCULES:
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outb(crtc_addr + 4, 0x21);
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break;
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default:
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break;
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}
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}
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else {
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switch (crtc_type) {
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case KD_VGA:
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load_palette(palette);
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count = 0;
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break;
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case KD_EGA:
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/* not yet done XXX */
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break;
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case KD_CGA:
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outb(crtc_addr + 4, 0x2d);
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break;
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case KD_MONO:
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case KD_HERCULES:
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outb(crtc_addr + 4, 0x29);
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break;
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default:
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break;
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}
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scrn_blanked = 0;
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}
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}
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static int
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fade_saver_load(struct lkm_table *lkmtp, int cmd)
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{
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switch (crtc_type) {
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case KD_MONO:
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case KD_HERCULES:
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case KD_CGA:
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/*
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* `fade' saver is not fully implemented for MDA and CGA.
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* It simply blanks the display instead.
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*/
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case KD_VGA:
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break;
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case KD_EGA:
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/* EGA is yet to be supported */
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default:
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return ENODEV;
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}
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return add_scrn_saver(fade_saver);
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}
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static int
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fade_saver_unload(struct lkm_table *lkmtp, int cmd)
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{
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return remove_scrn_saver(fade_saver);
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}
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int
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fade_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
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{
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MOD_DISPATCH(fade_saver, lkmtp, cmd, ver,
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fade_saver_load, fade_saver_unload, lkm_nullcmd);
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}
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