164 lines
4.1 KiB
C
164 lines
4.1 KiB
C
/*-
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* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
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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 without 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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* $FreeBSD$
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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/kernel.h>
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#include <sys/module.h>
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#include <sys/syslog.h>
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#include <sys/consio.h>
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#include <sys/fbio.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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#include <dev/syscons/syscons.h>
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#define SAVER_NAME "warp_saver"
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#define SPP 15
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#define STARS (SPP * (1 + 2 + 4 + 8))
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static u_char *vid;
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static int banksize, scrmode, bpsl, scrw, scrh;
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static int blanked;
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static int star[STARS];
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static u_char warp_pal[768] = {
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0x00, 0x00, 0x00,
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0x66, 0x66, 0x66,
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0x99, 0x99, 0x99,
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0xcc, 0xcc, 0xcc,
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0xff, 0xff, 0xff
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/* the rest is zero-filled by the compiler */
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};
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static void
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warp_update(video_adapter_t *adp)
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{
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int i, j, k, n, o, p;
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for (i = 1, k = 0, n = SPP*8; i < 5; i++, n /= 2) {
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for (j = 0; j < n; j++, k++) {
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p = (star[k] / scrw) * bpsl + (star[k] % scrw);
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o = 0;
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while (p > banksize) {
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p -= banksize;
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o += banksize;
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}
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set_origin(adp, o);
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vid[p] = 0;
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star[k] += i;
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if (star[k] > scrw*scrh)
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star[k] -= scrw*scrh;
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p = (star[k] / scrw) * bpsl + (star[k] % scrw);
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o = 0;
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while (p > banksize) {
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p -= banksize;
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o += banksize;
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}
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set_origin(adp, o);
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vid[p] = i;
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}
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}
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}
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static int
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warp_saver(video_adapter_t *adp, int blank)
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{
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int i, pl;
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if (blank) {
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/* switch to graphics mode */
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if (blanked <= 0) {
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pl = splhigh();
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set_video_mode(adp, scrmode);
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load_palette(adp, warp_pal);
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set_border(adp, 0);
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blanked++;
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vid = (u_char *)adp->va_window;
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banksize = adp->va_window_size;
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bpsl = adp->va_line_width;
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splx(pl);
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for (i = 0; i < bpsl * scrh; i += banksize) {
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set_origin(adp, i);
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bzero(vid, banksize);
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}
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}
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/* update display */
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warp_update(adp);
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} else {
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blanked = 0;
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}
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return (0);
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}
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static int
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warp_init(video_adapter_t *adp)
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{
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video_info_t info;
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int i;
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if (!get_mode_info(adp, M_VGA_CG320, &info)) {
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scrmode = M_VGA_CG320;
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} else if (!get_mode_info(adp, M_PC98_PEGC640x480, &info)) {
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scrmode = M_PC98_PEGC640x480;
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} else if (!get_mode_info(adp, M_PC98_PEGC640x400, &info)) {
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scrmode = M_PC98_PEGC640x400;
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} else {
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log(LOG_NOTICE,
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"%s: the console does not support M_VGA_CG320\n",
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SAVER_NAME);
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return (ENODEV);
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}
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scrw = info.vi_width;
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scrh = info.vi_height;
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/* randomize the star field */
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for (i = 0; i < STARS; i++)
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star[i] = random() % (scrw * scrh);
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return (0);
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}
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static int
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warp_term(video_adapter_t *adp)
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{
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return (0);
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}
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static scrn_saver_t warp_module = {
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SAVER_NAME,
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warp_init,
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warp_term,
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warp_saver,
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NULL
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};
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SAVER_MODULE(warp_saver, warp_module);
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