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 1.2 2003/06/17 04:28:47 dillon 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/fb/fbreg.h>
43 #include <dev/fb/splashreg.h>
44 #include <dev/syscons/syscons.h>
46 #define SAVER_NAME "dragon_saver"
52 #define VIDEO_MODE M_PC98_EGC640x400
53 #define VIDEO_MODE_NAME "M_PC98_EGC640x400"
57 #define VIDEO_MODE M_VGA_CG320
58 #define VIDEO_MODE_NAME "M_VGA_CG320"
66 static int cur_x, cur_y;
68 static u_char dragon_pal[3*256]; /* zero-filled by the compiler */
71 gpset(int x, int y, int val)
73 if (x < 0 || y < 0 || SCRW <= x || SCRH <= y) {
77 vid[(x + y * SCRW) >> 3] = (0x80 >> (x & 7)); /* write new dot */
79 vid[x + y * SCRW] = val;
85 gdraw(int dx, int dy, int val)
91 outb(0x7c, 0xcc); /* GRCG on & RMW mode(disable planeI,G) */
92 outb(0x7e, (val & 1) ? 0xff: 0); /* tile B */
93 outb(0x7e, (val & 2) ? 0xff: 0); /* tile R */
102 /* horizontal line */
103 for (; dx >= 0; --dx, ++i) {
104 set |= gpset(i, cur_y, val);
115 for (; dy >= 0; --dy, ++i) {
116 set |= gpset(cur_x, i, val);
120 outb(0x7c, 0); /* GRCG off */
129 outb(0x7c, 0x80); /* GRCG on & TDW mode */
130 outb(0x7e, 0); /* tile B */
131 outb(0x7e, 0); /* tile R */
132 outb(0x7e, 0); /* tile G */
133 outb(0x7e, 0); /* tile I */
135 fillw(0, vid, 0x8000);
137 outb(0x7c, 0); /* GRCG off */
139 bzero(vid, SCRW*SCRH);
144 dragon_update(video_adapter_t *adp)
147 static int order, mul, out;
148 static int org_x, org_y;
150 static unsigned char fold[1 << (ORDER - 3)];
151 #define GET_FOLD(x) (fold[(x) >> 3] & (1 << ((x) & 7)))
152 #define SET_FOLD(x) (fold[(x) >> 3] |= (1 << ((x) & 7)))
153 #define CLR_FOLD(x) (fold[(x) >> 3] &= ~(1 << ((x) & 7)))
159 /* set palette of each curves */
160 for (tmp = 0; tmp < 3*CURVE; ++tmp) {
161 dragon_pal[3+tmp] = (u_char)random();
163 load_palette(adp, dragon_pal);
165 mul = ((random() & 7) + 1) * (SCRW / 320);
166 org_x = random() % SCRW; org_y = random() % SCRH;
172 if (order >= ORDER) {
175 cur_x = org_x; cur_y = org_y;
188 (void)gdraw(dx, dy, curve); out = 0;
191 q = p = 0; i = q + 1;
195 SET_FOLD(p); q = p * 2;
201 if (GET_FOLD(q-i) != 0) {
203 tmp = dx; dx = dy; dy = -tmp; /* turn right */
207 tmp = dx; dx = -dy; dy = tmp; /* turn left */
209 if (gdraw(dx, dy, curve)) {
214 order = ORDER; /* force to terminate this curve */
221 dragon_saver(video_adapter_t *adp, int blank)
226 /* switch to graphics mode */
229 set_video_mode(adp, VIDEO_MODE);
230 vid = (u_char *)adp->va_window;
246 dragon_init(video_adapter_t *adp)
250 /* check that the console is capable of running in 320x200x256 */
251 if (get_mode_info(adp, VIDEO_MODE, &info)) {
253 "%s: the console does not support " VIDEO_MODE_NAME "\n",
263 dragon_term(video_adapter_t *adp)
268 static scrn_saver_t dragon_module = {
276 SAVER_MODULE(dragon_saver, dragon_module);