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

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);