2 * Copyright (c) 2000 Chiharu Shibata
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 without specific prior written permission.
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.
28 * $FreeBSD: src/sys/modules/syscons/dragon/dragon_saver.c,v 1.1.2.1 2003/05/11 01:17:02 murray Exp $
29 * $DragonFly: src/sys/dev/misc/syscons/dragon/dragon_saver.c,v 1.4 2005/02/13 03:02:25 swildner Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/syslog.h>
37 #include <sys/consio.h>
40 #include <sys/random.h>
42 #include <dev/video/fb/fbreg.h>
43 #include <dev/video/fb/splashreg.h>
44 #include "../syscons.h"
46 #define SAVER_NAME "dragon_saver"
51 #define VIDEO_MODE M_VGA_CG320
52 #define VIDEO_MODE_NAME "M_VGA_CG320"
59 static int cur_x, cur_y;
61 static u_char dragon_pal[3*256]; /* zero-filled by the compiler */
64 gpset(int x, int y, int val)
66 if (x < 0 || y < 0 || SCRW <= x || SCRH <= y) {
69 vid[x + y * SCRW] = val;
74 gdraw(int dx, int dy, int val)
87 for (; dx >= 0; --dx, ++i) {
88 set |= gpset(i, cur_y, val);
99 for (; dy >= 0; --dy, ++i) {
100 set |= gpset(cur_x, i, val);
107 dragon_update(video_adapter_t *adp)
110 static int order, mul, out;
111 static int org_x, org_y;
113 static unsigned char fold[1 << (ORDER - 3)];
114 #define GET_FOLD(x) (fold[(x) >> 3] & (1 << ((x) & 7)))
115 #define SET_FOLD(x) (fold[(x) >> 3] |= (1 << ((x) & 7)))
116 #define CLR_FOLD(x) (fold[(x) >> 3] &= ~(1 << ((x) & 7)))
120 bzero(vid, SCRW*SCRH);
122 /* set palette of each curves */
123 for (tmp = 0; tmp < 3*CURVE; ++tmp) {
124 dragon_pal[3+tmp] = (u_char)random();
126 load_palette(adp, dragon_pal);
128 mul = ((random() & 7) + 1) * (SCRW / 320);
129 org_x = random() % SCRW; org_y = random() % SCRH;
135 if (order >= ORDER) {
138 cur_x = org_x; cur_y = org_y;
151 (void)gdraw(dx, dy, curve); out = 0;
154 q = p = 0; i = q + 1;
158 SET_FOLD(p); q = p * 2;
164 if (GET_FOLD(q-i) != 0) {
166 tmp = dx; dx = dy; dy = -tmp; /* turn right */
170 tmp = dx; dx = -dy; dy = tmp; /* turn left */
172 if (gdraw(dx, dy, curve)) {
177 order = ORDER; /* force to terminate this curve */
184 dragon_saver(video_adapter_t *adp, int blank)
189 /* switch to graphics mode */
192 set_video_mode(adp, VIDEO_MODE);
193 vid = (u_char *)adp->va_window;
209 dragon_init(video_adapter_t *adp)
213 /* check that the console is capable of running in 320x200x256 */
214 if (get_mode_info(adp, VIDEO_MODE, &info)) {
216 "%s: the console does not support " VIDEO_MODE_NAME "\n",
226 dragon_term(video_adapter_t *adp)
231 static scrn_saver_t dragon_module = {
239 SAVER_MODULE(dragon_saver, dragon_module);