X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=glow_effect.h;h=2a2af16dd3abbd7d1bded97de0aaad88475b63bf;hp=04b48f9aa165e55ab7ba139dba36c883fb492f9b;hb=ddf71f853e64c3912eed4ab98bfe7503826ce8e1;hpb=e655afd53f2e56938bd4e7f72640eff56ef4a1ee

diff --git a/glow_effect.h b/glow_effect.h
index 04b48f9..2a2af16 100644
--- a/glow_effect.h
+++ b/glow_effect.h
@@ -1,12 +1,22 @@
-#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 <epoxy/gl.h>
+#include <assert.h>
+#include <string>
 
 #include "effect.h"
 
+namespace movit {
+
 class BlurEffect;
+class EffectChain;
+class HighlightCutoffEffect;
 class MixEffect;
+class Node;
 
 class GlowEffect : public Effect {
 public:
@@ -27,7 +37,26 @@ 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;
+};
+
+}  // namespace movit
+
+#endif // !defined(_MOVIT_GLOW_EFFECT_H)