Add "fire" screen saver.

Submitted by:	Brad Forschinger <retch@flag.blackened.net>

3 files changed, 114 insertions, 2 deletions

diff --git a/sys/modules/syscons/Makefile b/sys/modules/syscons/Makefile
index d817ca2..14c8f2f 100644
--- a/sys/modules/syscons/Makefile
+++ b/sys/modules/syscons/Makefile
@@ -1,5 +1,5 @@
-#	$Id: Makefile,v 1.6 1998/12/28 14:23:43 des Exp $
+#	$Id: Makefile,v 1.7 1998/12/31 13:42:00 des Exp $
 
-SUBDIR=	blank daemon fade green logo rain snake star warp
+SUBDIR=	blank daemon fade green logo rain snake star warp fire
 
 .include <bsd.subdir.mk>
diff --git a/sys/modules/syscons/fire/Makefile b/sys/modules/syscons/fire/Makefile
new file mode 100644
index 0000000..e078f2c
--- /dev/null
+++ b/sys/modules/syscons/fire/Makefile
@@ -0,0 +1,9 @@
+
+KMOD=	fire_saver
+SRCS= 	fire_saver.c
+
+NOMAN=
+CFLAGS+= -I${.CURDIR}/..
+CWARNFLAGS= -Wall -pedantic
+
+.include <bsd.kmod.mk>
diff --git a/sys/modules/syscons/fire/fire_saver.c b/sys/modules/syscons/fire/fire_saver.c
new file mode 100644
index 0000000..5e2c643
--- /dev/null
+++ b/sys/modules/syscons/fire/fire_saver.c
@@ -0,0 +1,103 @@
+
+/*
+ * brad forschinger, 19990504
+ * <retch@flag.blackened.net>
+ * 
+ * written with much help from warp_saver.c
+ * 
+ */
+
+#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>
+
+#define X_SIZE 320
+#define Y_SIZE 200
+
+int blanked;
+u_char fire_pal[768];
+u_char buf[X_SIZE * (Y_SIZE + 1)];
+
+int fire_saver(video_adapter_t *adp, int blank) {
+  static u_char *vid;
+  int x, y;
+
+  if (blank) {
+    if (blanked <= 0) {
+      int red, green, blue;
+      int palette_index;
+      
+      set_video_mode(adp, M_VGA_CG320);
+      
+      /* build palette */
+      red = green = blue = 0;
+      for (palette_index = 0; palette_index < 256; palette_index++) {
+
+	red++;
+	if (red > 128)
+	  green += 2;
+	
+	fire_pal[(palette_index * 3) + 0] = red;
+	fire_pal[(palette_index * 3) + 1] = green;
+	fire_pal[(palette_index * 3) + 2] = blue;
+      }
+      load_palette(adp, fire_pal);
+      
+      blanked++;
+      vid = (u_char *)adp->va_window;
+    }
+    
+    /* make a new bottom line */
+    for (x = 0, y = Y_SIZE; x < X_SIZE; x++) 
+      buf[x + (y * X_SIZE)] = random() % 160 + 96;
+  
+    /* fade the flames out */
+    for (y = 0; y < Y_SIZE; y++) {
+      for (x = 0; x < X_SIZE; x++) {
+	buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] +
+				 buf[(x - 1) + ((y + 1) * X_SIZE)] +
+				 buf[(x + 0) + ((y + 1) * X_SIZE)] +
+				 buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4;
+	if (buf[x + (y * X_SIZE)] > 0)
+	  buf[x + (y * X_SIZE)]--;
+      }
+    }
+    
+    /* put our buffer into video ram */
+    memcpy(vid, buf, X_SIZE * Y_SIZE);
+  } else {
+    blanked = 0;
+  }
+  
+  return(0);
+}
+
+int fire_initialise(video_adapter_t *adp) {
+  video_info_t info;
+  
+  if (get_mode_info(adp, M_VGA_CG320, &info)) {
+    log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n");
+    return(ENODEV);
+  } 
+  
+  blanked = 0;    
+  
+  return(0);
+}
+  
+int fire_terminate(video_adapter_t *adp) {
+  return(0);
+}
+
+static scrn_saver_t fire_module = {
+  "fire_saver", fire_initialise, fire_terminate, fire_saver, NULL
+};
+
+SAVER_MODULE(fire_saver, fire_module);