X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.h;h=b93848a70a9d04175098695c4606ed0c4d0a2a60;hp=497a38c7ec4f756d1f222f300d897dc9d51f8e24;hb=927e131593a58bea69ae5e742aa5a1657082c9f1;hpb=a88f299483ffe5068cd2828513078b9103325da8

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index 497a38c..b93848a 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -1,15 +1,29 @@
 #ifndef _GAMMA_EXPANSION_EFFECT_H 
 #define _GAMMA_EXPANSION_EFFECT_H 1
 
+// An effect to convert the given gamma curve into linear light,
+// typically inserted by the framework automatically at the beginning
+// of the processing chain.
+//
+// Currently supports sRGB and Rec. 601/709.
+
 #include "effect.h"
 #include "effect_chain.h"
 
+#define EXPANSION_CURVE_SIZE 256
+
 class GammaExpansionEffect : public Effect {
 public:
 	GammaExpansionEffect();
+	virtual std::string effect_type_id() const { return "GammaExpansionEffect"; }
+	std::string output_fragment_shader();
+
+	virtual bool needs_linear_light() const { return false; }
+	virtual bool needs_srgb_primaries() const { return false; }
 
 private:
 	GammaCurve source_curve;
+	float expansion_curve[EXPANSION_CURVE_SIZE];
 };
 
 #endif // !defined(_GAMMA_EXPANSION_EFFECT_H)