From c4574a9fb0281ff3945ecb7eedf101680a7db6ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Sun, 25 Aug 2002 18:55:02 +0000
Subject: *** empty log message ***

svn path=/trunk/Framestein/; revision=88
---
 Plugins/gol.c | 84 +++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 50 insertions(+), 34 deletions(-)

(limited to 'Plugins/gol.c')

diff --git a/Plugins/gol.c b/Plugins/gol.c
index 89ff284..3349df2 100644
--- a/Plugins/gol.c
+++ b/Plugins/gol.c
@@ -1,8 +1,9 @@
-
 //
-// Game of Life .. what a waste of time
+// Conway's Game of Life .. also take a look at rowca.cpp
 //
 
+// Currently only works with 16bit displays
+
 #include <stdlib.h>
 #include <stdio.h>
 #include "plugin.h"
@@ -10,40 +11,59 @@
 #define BORN	1
 #define DYING	2
 
-int dead = 0;
-
 int aroundme(_frame f, int x, int y)
 {
+	pixel16 *p;
 	int i=0;
-	if(r16(scanline16(f, y-1)[x-1])>dead) i++;
-	if(r16(scanline16(f, y-1)[x])>dead) i++;
-	if(r16(scanline16(f, y-1)[x+1])>dead) i++;
-	if(r16(scanline16(f, y)[x-1])>dead) i++;
-	if(r16(scanline16(f, y)[x+1])>dead) i++;
-	if(r16(scanline16(f, y+1)[x-1])>dead) i++;
-	if(r16(scanline16(f, y+1)[x])>dead) i++;
-	if(r16(scanline16(f, y+1)[x+1])>dead) i++;
+
+	p=scanline16(f, y-1);
+	if(p[x-1]) i++;
+	if(p[x]) i++;
+	if(p[x+1]) i++;
+
+	p=scanline16(f, y);
+	if(p[x-1]) i++;
+	if(p[x+1]) i++;
+
+	p=scanline16(f, y+1);
+	if(p[x-1]) i++;
+	if(p[x]) i++;
+	if(p[x+1]) i++;
+
 	return i;
 }
 
-void setstate(_frame f, byte *t, int x, int y)
+byte *t=0;
+long size=0;
+
+void setstate(_frame f, int x, int y)
 {
 	int i = aroundme(f, x, y);
 
 	if(i<=1 || i>=4) t[y*f.width+x]=DYING;
-	else
-	if(i==3) t[y*f.width+x]=BORN;
+	else if(i==3) t[y*f.width+x]=BORN;
 }
 
 void perform_effect(struct frame f, struct args a)
 {
 	int x,y,i,r;
 	pixel16 *p, c;
-	byte *t;
 
-	if(f.pixelformat!=16) return;
+	if(f.pixelformat!=16)
+	{
+		printf("Sorry, gol works only on a 16bit display.\n");
+		return;
+	}
+
+	if(t && size != f.width*f.height)
+	{
+		free(t);
+		t=0;
+	}
+
+	if(!t)
+		t = malloc(size = f.width*f.height);
 
-	t = malloc(f.width*f.height);
 	memset(t, 0, f.width*f.height);
 
 	for(y=2; y<f.height-3; y++)
@@ -51,17 +71,17 @@ void perform_effect(struct frame f, struct args a)
 		p = scanline16(f, y);
 		for(x=2; x<f.width-3; x++)
 		{
-			if(r16(p[x])>0)
+			if(p[x])
 			{
-				setstate(f, t, x-1, y-1);
-				setstate(f, t, x, y-1);
-				setstate(f, t, x+1, y-1);
-				setstate(f, t, x-1, y);
-				setstate(f, t, x, y);
-				setstate(f, t, x+1, y);
-				setstate(f, t, x-1, y+1);
-				setstate(f, t, x, y+1);
-				setstate(f, t, x+1, y+1);
+				setstate(f, x-1, y-1);
+				setstate(f, x, y-1);
+				setstate(f, x+1, y-1);
+				setstate(f, x-1, y);
+				setstate(f, x, y);
+				setstate(f, x+1, y);
+				setstate(f, x-1, y+1);
+				setstate(f, x, y+1);
+				setstate(f, x+1, y+1);
 			}
 		}
 	}
@@ -74,16 +94,12 @@ void perform_effect(struct frame f, struct args a)
 			switch(t[y*f.width+x])
 			{
 				case BORN:
-					c = p[x];
-					r = r16(c);
-					p[x] = rgbtocolor16(r>0 ? r : 255, g16(c), b16(c));
+					p[x] = 5000;
 					break;
 				case DYING:
-					c = p[+x];
-					p[x] = rgbtocolor16(0, g16(c), b16(c));
+					p[x] = 0;
 					break;
 			}
 		}
 	}
-	free(t);
 }
-- 
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