// Glow: Cut out the highlights of the image (everything above a certain threshold),
// blur them, and overlay them onto the original image.
+#include <GL/glew.h>
+#include <assert.h>
+#include <string>
+
#include "effect.h"
class BlurEffect;
-class MixEffect;
+class EffectChain;
class HighlightCutoffEffect;
+class MixEffect;
+class Node;
class GlowEffect : public Effect {
public: