186d7f5d3SJohn Marino /*-
286d7f5d3SJohn Marino * Copyright (c) 2000 Chiharu Shibata
386d7f5d3SJohn Marino * All rights reserved.
486d7f5d3SJohn Marino *
586d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without
686d7f5d3SJohn Marino * modification, are permitted provided that the following conditions
786d7f5d3SJohn Marino * are met:
886d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright
986d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer
1086d7f5d3SJohn Marino * in this position and unchanged.
1186d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
1286d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the
1386d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution.
1486d7f5d3SJohn Marino * 3. The name of the author may not be used to endorse or promote products
1586d7f5d3SJohn Marino * derived from this software without specific prior written permission.
1686d7f5d3SJohn Marino *
1786d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1886d7f5d3SJohn Marino * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1986d7f5d3SJohn Marino * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
2086d7f5d3SJohn Marino * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
2186d7f5d3SJohn Marino * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
2286d7f5d3SJohn Marino * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
2386d7f5d3SJohn Marino * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
2486d7f5d3SJohn Marino * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
2586d7f5d3SJohn Marino * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
2686d7f5d3SJohn Marino * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2786d7f5d3SJohn Marino *
2886d7f5d3SJohn Marino * $FreeBSD: src/sys/modules/syscons/dragon/dragon_saver.c,v 1.1.2.1 2003/05/11 01:17:02 murray Exp $
2986d7f5d3SJohn Marino * $DragonFly: src/sys/dev/misc/syscons/dragon/dragon_saver.c,v 1.6 2006/09/03 18:52:26 dillon Exp $
3086d7f5d3SJohn Marino */
3186d7f5d3SJohn Marino
3286d7f5d3SJohn Marino #include <sys/param.h>
3386d7f5d3SJohn Marino #include <sys/systm.h>
3486d7f5d3SJohn Marino #include <sys/kernel.h>
3586d7f5d3SJohn Marino #include <sys/module.h>
3686d7f5d3SJohn Marino #include <sys/syslog.h>
3786d7f5d3SJohn Marino #include <sys/consio.h>
3886d7f5d3SJohn Marino #include <sys/fbio.h>
3986d7f5d3SJohn Marino #include <sys/thread.h>
4086d7f5d3SJohn Marino #include <sys/thread2.h>
4186d7f5d3SJohn Marino
4286d7f5d3SJohn Marino #include <sys/random.h>
4386d7f5d3SJohn Marino
4486d7f5d3SJohn Marino #include <dev/video/fb/fbreg.h>
4586d7f5d3SJohn Marino #include <dev/video/fb/splashreg.h>
4686d7f5d3SJohn Marino #include "../syscons.h"
4786d7f5d3SJohn Marino
4886d7f5d3SJohn Marino #define SAVER_NAME "dragon_saver"
4986d7f5d3SJohn Marino
5086d7f5d3SJohn Marino static u_char *vid;
5186d7f5d3SJohn Marino static int blanked;
5286d7f5d3SJohn Marino
5386d7f5d3SJohn Marino #define VIDEO_MODE M_VGA_CG320
5486d7f5d3SJohn Marino #define VIDEO_MODE_NAME "M_VGA_CG320"
5586d7f5d3SJohn Marino #define SCRW 320
5686d7f5d3SJohn Marino #define SCRH 200
5786d7f5d3SJohn Marino #define ORDER 13
5886d7f5d3SJohn Marino #define CURVE 3
5986d7f5d3SJohn Marino #define OUT 100
6086d7f5d3SJohn Marino
6186d7f5d3SJohn Marino static int cur_x, cur_y;
6286d7f5d3SJohn Marino static int curve;
6386d7f5d3SJohn Marino static u_char dragon_pal[3*256]; /* zero-filled by the compiler */
6486d7f5d3SJohn Marino
6586d7f5d3SJohn Marino static __inline int
gpset(int x,int y,int val)6686d7f5d3SJohn Marino gpset(int x, int y, int val)
6786d7f5d3SJohn Marino {
6886d7f5d3SJohn Marino if (x < 0 || y < 0 || SCRW <= x || SCRH <= y) {
6986d7f5d3SJohn Marino return 0;
7086d7f5d3SJohn Marino }
7186d7f5d3SJohn Marino vid[x + y * SCRW] = val;
7286d7f5d3SJohn Marino return 1;
7386d7f5d3SJohn Marino }
7486d7f5d3SJohn Marino
7586d7f5d3SJohn Marino static int
gdraw(int dx,int dy,int val)7686d7f5d3SJohn Marino gdraw(int dx, int dy, int val)
7786d7f5d3SJohn Marino {
7886d7f5d3SJohn Marino int i;
7986d7f5d3SJohn Marino int set = 0;
8086d7f5d3SJohn Marino
8186d7f5d3SJohn Marino if (dx != 0) {
8286d7f5d3SJohn Marino i = cur_x;
8386d7f5d3SJohn Marino cur_x += dx;
8486d7f5d3SJohn Marino if (dx < 0) {
8586d7f5d3SJohn Marino i += dx;
8686d7f5d3SJohn Marino dx = -dx;
8786d7f5d3SJohn Marino }
8886d7f5d3SJohn Marino /* horizontal line */
8986d7f5d3SJohn Marino for (; dx >= 0; --dx, ++i) {
9086d7f5d3SJohn Marino set |= gpset(i, cur_y, val);
9186d7f5d3SJohn Marino }
9286d7f5d3SJohn Marino }
9386d7f5d3SJohn Marino else { /* dy != 0 */
9486d7f5d3SJohn Marino i = cur_y;
9586d7f5d3SJohn Marino cur_y += dy;
9686d7f5d3SJohn Marino if (dy < 0) {
9786d7f5d3SJohn Marino i += dy;
9886d7f5d3SJohn Marino dy = -dy;
9986d7f5d3SJohn Marino }
10086d7f5d3SJohn Marino /* vertical line */
10186d7f5d3SJohn Marino for (; dy >= 0; --dy, ++i) {
10286d7f5d3SJohn Marino set |= gpset(cur_x, i, val);
10386d7f5d3SJohn Marino }
10486d7f5d3SJohn Marino }
10586d7f5d3SJohn Marino return set;
10686d7f5d3SJohn Marino }
10786d7f5d3SJohn Marino
10886d7f5d3SJohn Marino static void
dragon_update(video_adapter_t * adp)10986d7f5d3SJohn Marino dragon_update(video_adapter_t *adp)
11086d7f5d3SJohn Marino {
11186d7f5d3SJohn Marino static int i, p, q;
11286d7f5d3SJohn Marino static int order, mul, out;
11386d7f5d3SJohn Marino static int org_x, org_y;
11486d7f5d3SJohn Marino static int dx, dy;
11586d7f5d3SJohn Marino static unsigned char fold[1 << (ORDER - 3)];
11686d7f5d3SJohn Marino #define GET_FOLD(x) (fold[(x) >> 3] & (1 << ((x) & 7)))
11786d7f5d3SJohn Marino #define SET_FOLD(x) (fold[(x) >> 3] |= (1 << ((x) & 7)))
11886d7f5d3SJohn Marino #define CLR_FOLD(x) (fold[(x) >> 3] &= ~(1 << ((x) & 7)))
11986d7f5d3SJohn Marino int tmp;
12086d7f5d3SJohn Marino
12186d7f5d3SJohn Marino if (curve > CURVE) {
12286d7f5d3SJohn Marino bzero(vid, SCRW*SCRH);
12386d7f5d3SJohn Marino
12486d7f5d3SJohn Marino /* set palette of each curves */
12586d7f5d3SJohn Marino for (tmp = 0; tmp < 3*CURVE; ++tmp) {
12686d7f5d3SJohn Marino dragon_pal[3+tmp] = (u_char)krandom();
12786d7f5d3SJohn Marino }
12886d7f5d3SJohn Marino load_palette(adp, dragon_pal);
12986d7f5d3SJohn Marino
13086d7f5d3SJohn Marino mul = ((krandom() & 7) + 1) * (SCRW / 320);
13186d7f5d3SJohn Marino org_x = krandom() % SCRW; org_y = krandom() % SCRH;
13286d7f5d3SJohn Marino
13386d7f5d3SJohn Marino curve = 0;
13486d7f5d3SJohn Marino order = ORDER;
13586d7f5d3SJohn Marino }
13686d7f5d3SJohn Marino
13786d7f5d3SJohn Marino if (order >= ORDER) {
13886d7f5d3SJohn Marino ++curve;
13986d7f5d3SJohn Marino
14086d7f5d3SJohn Marino cur_x = org_x; cur_y = org_y;
14186d7f5d3SJohn Marino
14286d7f5d3SJohn Marino switch (curve) {
14386d7f5d3SJohn Marino case 1:
14486d7f5d3SJohn Marino dx = 0; dy = mul;
14586d7f5d3SJohn Marino break;
14686d7f5d3SJohn Marino case 2:
14786d7f5d3SJohn Marino dx = mul; dy = 0;
14886d7f5d3SJohn Marino break;
14986d7f5d3SJohn Marino case 3:
15086d7f5d3SJohn Marino dx = 0; dy = -mul;
15186d7f5d3SJohn Marino break;
15286d7f5d3SJohn Marino }
15386d7f5d3SJohn Marino (void)gdraw(dx, dy, curve); out = 0;
15486d7f5d3SJohn Marino
15586d7f5d3SJohn Marino order = 0;
15686d7f5d3SJohn Marino q = p = 0; i = q + 1;
15786d7f5d3SJohn Marino }
15886d7f5d3SJohn Marino
15986d7f5d3SJohn Marino if (i > q) {
16086d7f5d3SJohn Marino SET_FOLD(p); q = p * 2;
16186d7f5d3SJohn Marino
16286d7f5d3SJohn Marino ++order;
16386d7f5d3SJohn Marino i = p; p = q + 1;
16486d7f5d3SJohn Marino }
16586d7f5d3SJohn Marino
16686d7f5d3SJohn Marino if (GET_FOLD(q-i) != 0) {
16786d7f5d3SJohn Marino CLR_FOLD(i);
16886d7f5d3SJohn Marino tmp = dx; dx = dy; dy = -tmp; /* turn right */
16986d7f5d3SJohn Marino }
17086d7f5d3SJohn Marino else {
17186d7f5d3SJohn Marino SET_FOLD(i);
17286d7f5d3SJohn Marino tmp = dx; dx = -dy; dy = tmp; /* turn left */
17386d7f5d3SJohn Marino }
17486d7f5d3SJohn Marino if (gdraw(dx, dy, curve)) {
17586d7f5d3SJohn Marino out = 0;
17686d7f5d3SJohn Marino }
17786d7f5d3SJohn Marino else {
17886d7f5d3SJohn Marino if (++out > OUT) {
17986d7f5d3SJohn Marino order = ORDER; /* force to terminate this curve */
18086d7f5d3SJohn Marino }
18186d7f5d3SJohn Marino }
18286d7f5d3SJohn Marino ++i;
18386d7f5d3SJohn Marino }
18486d7f5d3SJohn Marino
18586d7f5d3SJohn Marino static int
dragon_saver(video_adapter_t * adp,int blank)18686d7f5d3SJohn Marino dragon_saver(video_adapter_t *adp, int blank)
18786d7f5d3SJohn Marino {
18886d7f5d3SJohn Marino if (blank) {
18986d7f5d3SJohn Marino /* switch to graphics mode */
19086d7f5d3SJohn Marino if (blanked <= 0) {
19186d7f5d3SJohn Marino crit_enter();
19286d7f5d3SJohn Marino set_video_mode(adp, VIDEO_MODE);
19386d7f5d3SJohn Marino vid = (u_char *)adp->va_window;
19486d7f5d3SJohn Marino curve = CURVE + 1;
19586d7f5d3SJohn Marino ++blanked;
19686d7f5d3SJohn Marino crit_exit();
19786d7f5d3SJohn Marino }
19886d7f5d3SJohn Marino
19986d7f5d3SJohn Marino /* update display */
20086d7f5d3SJohn Marino dragon_update(adp);
20186d7f5d3SJohn Marino }
20286d7f5d3SJohn Marino else {
20386d7f5d3SJohn Marino blanked = 0;
20486d7f5d3SJohn Marino }
20586d7f5d3SJohn Marino return 0;
20686d7f5d3SJohn Marino }
20786d7f5d3SJohn Marino
20886d7f5d3SJohn Marino static int
dragon_init(video_adapter_t * adp)20986d7f5d3SJohn Marino dragon_init(video_adapter_t *adp)
21086d7f5d3SJohn Marino {
21186d7f5d3SJohn Marino video_info_t info;
21286d7f5d3SJohn Marino
21386d7f5d3SJohn Marino /* check that the console is capable of running in 320x200x256 */
21486d7f5d3SJohn Marino if (get_mode_info(adp, VIDEO_MODE, &info)) {
21586d7f5d3SJohn Marino log(LOG_NOTICE,
21686d7f5d3SJohn Marino "%s: the console does not support " VIDEO_MODE_NAME "\n",
21786d7f5d3SJohn Marino SAVER_NAME);
21886d7f5d3SJohn Marino return ENODEV;
21986d7f5d3SJohn Marino }
22086d7f5d3SJohn Marino
22186d7f5d3SJohn Marino blanked = 0;
22286d7f5d3SJohn Marino return 0;
22386d7f5d3SJohn Marino }
22486d7f5d3SJohn Marino
22586d7f5d3SJohn Marino static int
dragon_term(video_adapter_t * adp)22686d7f5d3SJohn Marino dragon_term(video_adapter_t *adp)
22786d7f5d3SJohn Marino {
22886d7f5d3SJohn Marino return 0;
22986d7f5d3SJohn Marino }
23086d7f5d3SJohn Marino
23186d7f5d3SJohn Marino static scrn_saver_t dragon_module = {
23286d7f5d3SJohn Marino SAVER_NAME,
23386d7f5d3SJohn Marino dragon_init,
23486d7f5d3SJohn Marino dragon_term,
23586d7f5d3SJohn Marino dragon_saver,
23686d7f5d3SJohn Marino NULL,
23786d7f5d3SJohn Marino };
23886d7f5d3SJohn Marino
23986d7f5d3SJohn Marino SAVER_MODULE(dragon_saver, dragon_module);
240