X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=glow_effect.h;h=91106e03b08927ab3498d784f3611b05e36aafa8;hp=7ee164dceab630d2d1ab2f7573ce4f581bbb037a;hb=5c97329dd35909847e2120b0b368b2723ffe5a44;hpb=ef7665d0d3854b3464800d8d7fef9a90f14d9a9f

diff --git a/glow_effect.h b/glow_effect.h
index 7ee164d..91106e0 100644
--- a/glow_effect.h
+++ b/glow_effect.h
@@ -1,20 +1,29 @@
-#ifndef _GLOW_EFFECT_H
-#define _GLOW_EFFECT_H 1
+#ifndef _MOVIT_GLOW_EFFECT_H
+#define _MOVIT_GLOW_EFFECT_H 1
 
-// Glow: Simply add a blurred version of the image to itself.
+// 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 EffectChain;
+class HighlightCutoffEffect;
 class MixEffect;
+class Node;
 
 class GlowEffect : public Effect {
 public:
 	GlowEffect();
+	virtual std::string effect_type_id() const { return "GlowEffect"; }
 
 	virtual bool needs_srgb_primaries() const { return false; }
 
-	virtual void add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &input);
+	virtual void rewrite_graph(EffectChain *graph, Node *self);
 	virtual bool set_float(const std::string &key, float value);
 
 	virtual std::string output_fragment_shader() {
@@ -26,7 +35,24 @@ public:
 
 private:
 	BlurEffect *blur;
+	HighlightCutoffEffect *cutoff;
 	MixEffect *mix;
 };
 
-#endif // !defined(_GLOW_EFFECT_H)
+// An effect that cuts out only the highlights of an image;
+// anything at the cutoff or below is set to 0.0, and then all other pixels
+// get the cutoff subtracted. Used only as part of GlowEffect.
+
+class HighlightCutoffEffect : public Effect {
+public:
+	HighlightCutoffEffect();
+	virtual std::string effect_type_id() const { return "HighlightCutoffEffect"; }
+	std::string output_fragment_shader();
+	
+	virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+
+private:
+	float cutoff;
+};
+
+#endif // !defined(_MOVIT_GLOW_EFFECT_H)