1 files changed, 38 insertions, 0 deletions
diff --git a/Plugins/subtract.cpp b/Plugins/subtract.cpp
new file mode 100644
index 0000000..89ba216
--- /dev/null
+++ b/Plugins/subtract.cpp
@@ -0,0 +1,38 @@
+// 0.20
+// - from c to c++
+// - pixelformat-aware
+
+#include <stdlib.h>
+#include <string.h>
+#include "plugin.h"
+#include "pixels.h"
+
+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;
+
+	r = atoi(a.s);
+	if(t = strstr(a.s, " "))
+	{
+		g = atoi(t+1);
+		if (t = strstr(t+1, " "))
+			b = atoi(t+1);
+	}
+
+	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();
+	}
+}