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authordes <des@FreeBSD.org>1998-12-27 22:03:09 +0000
committerdes <des@FreeBSD.org>1998-12-27 22:03:09 +0000
commit3b7e907f0217c81f191e3f8317273fe54c39317d (patch)
tree05aded9211959991202ecfceb9e043196bb1f3c9 /sys/dev/syscons
parentc7ecc129d72ba32b5d83c9a6019e93fd181d719c (diff)
downloadFreeBSD-src-3b7e907f0217c81f191e3f8317273fe54c39317d.zip
FreeBSD-src-3b7e907f0217c81f191e3f8317273fe54c39317d.tar.gz
Finally give FreeBSD a graphical screensaver. It isn't much, but it works,
and can serve as a template for further efforts. Consider this my (belated) Christmas present to the Project :) Requested by: jkh
Diffstat (limited to 'sys/dev/syscons')
-rw-r--r--sys/dev/syscons/warp/warp_saver.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/sys/dev/syscons/warp/warp_saver.c b/sys/dev/syscons/warp/warp_saver.c
new file mode 100644
index 0000000..138b8d4
--- /dev/null
+++ b/sys/dev/syscons/warp/warp_saver.c
@@ -0,0 +1,141 @@
+/*-
+ * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer
+ * in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/syslog.h>
+
+#include <machine/md_var.h>
+#include <machine/random.h>
+
+#include <saver.h>
+
+static u_char *vid;
+
+#define SCRW 320
+#define SCRH 200
+#define SPP 15
+#define STARS (SPP*(1+2+4+8))
+
+static int star[STARS];
+static u_char warp_pal[768] = {
+ 0x00, 0x00, 0x00,
+ 0x66, 0x66, 0x66,
+ 0x99, 0x99, 0x99,
+ 0xcc, 0xcc, 0xcc,
+ 0xff, 0xff, 0xff
+ /* the rest is zero-filled by the compiler */
+};
+
+static void
+warp_update(void)
+{
+ int i, j, k, n;
+
+ for (i = k = 1, n = SPP*8; i < 5; i++, n /= 2)
+ for (j = 0; j < n; j++, k++) {
+ vid[star[k]] = 0;
+ star[k] += i;
+ if (star[k] > SCRW*SCRH)
+ star[k] -= SCRW*SCRH;
+ vid[star[k]] = i;
+ }
+}
+
+static void
+warp_saver(int blank)
+{
+ scr_stat *scp = cur_console;
+ static int saved_mode;
+ int pl;
+
+ if (blank) {
+ /* switch to graphics mode */
+ if (scrn_blanked <= 0) {
+ pl = splhigh();
+ saved_mode = scp->mode;
+ scp->mode = M_VGA_CG320;
+ scp->status |= SAVER_RUNNING|GRAPHICS_MODE;
+ set_mode(scp);
+ scrn_blanked++;
+ vid = (u_char *)Crtat;
+ load_palette(scp, (char *)warp_pal);
+ splx(pl);
+ bzero(vid, SCRW*SCRH);
+ }
+
+ /* update display */
+ warp_update();
+
+ } else {
+ /* return to previous video mode */
+ if (scrn_blanked > 0) {
+ if (saved_mode) {
+ pl = splhigh();
+ scrn_blanked = 0;
+ scp->mode = saved_mode;
+ scp->status &= ~(SAVER_RUNNING|GRAPHICS_MODE);
+ set_mode(scp);
+ saved_mode = 0;
+ splx(pl);
+ }
+ }
+ }
+}
+
+static int
+warp_saver_load(void)
+{
+ video_info_t info;
+ int i;
+
+ /* check that the console is capable of running in 320x200x256 */
+ if ((*biosvidsw.get_info)(cur_console->adp, M_VGA_CG320, &info)) {
+ log(LOG_NOTICE, "warp_saver: the console does not support M_VGA_CG320\n");
+ return ENODEV;
+ }
+
+ /* randomize the star field */
+ for (i = 0; i < STARS; i++) {
+ star[i] = random() % (SCRW*SCRH);
+ }
+
+ return add_scrn_saver(warp_saver);
+}
+
+static int
+warp_saver_unload(void)
+{
+ return remove_scrn_saver(warp_saver);
+}
+
+SAVER_MODULE(warp_saver);
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