added new plugin

Plugins/Makefile

@@ -1,10 +1,12 @@
 CXXFLAGS=-O3
 
-all: plug-debug plugin-blend.dylib plugin-selfalpha.dylib plugin-randcolor.dylib plugin-selfalpha-reblend.dylib
+all: plug-debug plugin-blend.dylib plugin-selfalpha.dylib plugin-randcolor.dylib plugin-selfalpha-reblend.dylib temp-plugin.dylib
 
 plug-debug: loadplugin.cpp
 	$(CXX) $(CXXFLAGS) loadplugin.cpp -o plug-debug
 
+temp-plugin.dylib: temp-plugin.cpp
+	$(CXX) $(CXXFLAGS) -shared temp-plugin.cpp -o temp-plugin.dylib
 plugin.dylib: plugin.cpp
 	$(CXX) $(CXXFLAGS) -shared plugin.cpp -o plugin.dylib
 plugin-blend.dylib: plugin-blend.cpp

Plugins/temp-plugin.cpp

@@ -0,0 +1,26 @@
+#include<cmath>
+
+extern "C" void pixel(int x, int y, unsigned char *pix);
+extern "C" void drawn();
+
+static double scale_r = 1.0, scale_g = 10.0, scale_b = 1.0;
+
+// pixel operation here, called once for every pixel each frame
+void pixel(int x, int y, unsigned char *pix) {
+    pix[0] *= scale_r;
+    pix[1] *= scale_g;
+    pix[2] *= scale_b;
+}
+// called when frame is done drawing
+void drawn() {
+
+    scale_r += 0.01f;
+    scale_g -= 0.01f;
+    scale_b += 0.05f;
+
+    if(scale_r >= 10) scale_r = 1.0;
+    if(scale_g <= 1) scale_g = 10.0;
+    if(scale_b >= 5) scale_b = 1.0;
+
+}
+