X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=saturation_effect.h;h=8a3aece844aa45b9cce0d0d36e0fb4231189c33d;hp=6cfc3d0ee0392c49d18e5a0b3f782c40fc5889e9;hb=b3d1c89c7c8953cb4c73b7dba50c9813042976fa;hpb=17c083aad45a10df14c38cfe879a87220dfd4fb9

diff --git a/saturation_effect.h b/saturation_effect.h
index 6cfc3d0..8a3aece 100644
--- a/saturation_effect.h
+++ b/saturation_effect.h
@@ -1,15 +1,30 @@
-#ifndef _SATURATION_EFFECT_H
-#define _SATURATION_EFFECT_H 1
+#ifndef _MOVIT_SATURATION_EFFECT_H
+#define _MOVIT_SATURATION_EFFECT_H 1
+
+// A simple desaturation/saturation effect. We use the Rec. 709
+// definition of luminance (in linear light, of course) and linearly
+// interpolate between that (saturation=0) and the original signal
+// (saturation=1). Extrapolating that curve further (ie., saturation > 1)
+// gives us increased saturation if so desired.
+
+#include <string>
 
 #include "effect.h"
 
+namespace movit {
+
 class SaturationEffect : public Effect {
 public:
 	SaturationEffect();
-	std::string output_fragment_shader();
+	std::string effect_type_id() const override { return "SaturationEffect"; }
+	AlphaHandling alpha_handling() const override { return DONT_CARE_ALPHA_TYPE; }
+	bool strong_one_to_one_sampling() const override { return true; }
+	std::string output_fragment_shader() override;
 
 private:
 	float saturation;
 };
 
-#endif // !defined(_SATURATION_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_SATURATION_EFFECT_H)