From 3bd43c9d18e565e193e555f9de0ce916f8faf807 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Wed, 18 Sep 2002 16:32:27 +0000
Subject: *** empty log message ***

svn path=/trunk/Framestein/; revision=132
---
 Plugins/subtract.cpp | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

(limited to 'Plugins/subtract.cpp')

diff --git a/Plugins/subtract.cpp b/Plugins/subtract.cpp
index 89ba216..3172513 100644
--- a/Plugins/subtract.cpp
+++ b/Plugins/subtract.cpp
@@ -1,3 +1,9 @@
+//
+// subtract - subtract red/green/blue color from image
+//
+// 0.32
+// using arguments-class
+//
 // 0.20
 // - from c to c++
 // - pixelformat-aware
@@ -9,30 +15,35 @@
 
 void perform_effect(_frame f, _args a)
 {
-	pixels p(f);
-	char *t;
-	byte tr, tg, tb, r=0, g=0, b=0;
-
-	if(!a.s) return;
+	arguments ar(a.s);
 
-	r = atoi(a.s);
-	if(t = strstr(a.s, " "))
+	if(ar.count()!=3)
 	{
-		g = atoi(t+1);
-		if (t = strstr(t+1, " "))
-			b = atoi(t+1);
+		printf("usage: subtract <red> <green> <blue>\n");
+		return;
 	}
 
+	byte r, g, b;
+
+	r = atoi(ar[0]);
+	g = atoi(ar[1]);
+	b = atoi(ar[2]);
+
+	pixels p(f);
+	byte tr, tg, tb;
+
 	while(!p.eof())
 	{
 		tr = p.red();
 		tg = p.green();
 		tb = p.blue();
+
 		p.putrgb(
 		 tr>r ? tr-r : 0,
 		 tg>g ? tg-g : 0,
 		 tb>b ? tb-b : 0
 		);
+
 		p.next();
 	}
 }
-- 
cgit v1.2.1