From 4d64e4cd434426234a5c313c151cd79b6afc299e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Sat, 6 Jul 2002 17:50:18 +0000
Subject: *** empty log message ***

svn path=/trunk/Framestein/; revision=27
---
 Plugins/shuffle.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 Plugins/shuffle.c

(limited to 'Plugins/shuffle.c')

diff --git a/Plugins/shuffle.c b/Plugins/shuffle.c
new file mode 100644
index 0000000..0604595
--- /dev/null
+++ b/Plugins/shuffle.c
@@ -0,0 +1,42 @@
+#include <string.h>
+#include "plugin.h"
+
+void perform_effect(_frame f, _args a)
+{
+	int i, o=1000, x1, y1, x2, y2, range=10;
+	char *t;
+	pixel8 *p1, *p2;
+	pixel32 dot;
+	byte pixelsize=f.pixelformat/8;
+
+	if(f.pixelformat>32) return;
+
+	if(a.s)
+	{
+		o = atoi(a.s);
+		if(o==0) o=1000;
+
+		if(t = strstr(a.s, " "))
+		if((range = atoi(t+1))==0) return;
+	}
+
+	for(i=0; i<o; i++)
+	{
+		x1 = rand()%f.width;
+		y1 = rand()%f.height;
+		x2 = x1 + (rand()%(range*2) - range);
+		y2 = y1 + (rand()%(range*2) - range);
+
+		if(x2<0) x2=0;
+		if(x2>=f.width) x2=f.width-1;
+		if(y2<0) y2=0;
+		if(y2>=f.height) y2=f.height-1;
+
+		p1 = scanline(f, y1);
+		p2 = scanline(f, y2);
+
+		memcpy(&dot, &p2[x2*pixelsize], pixelsize);
+		memcpy(&p2[x2*pixelsize], &p1[x1*pixelsize], pixelsize);
+		memcpy(&p1[x1*pixelsize], &dot, pixelsize);
+	}
+}
-- 
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