X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=gamma_expansion_effect.h;h=07d94bea60a6f7784b94b5328ac86cb063d59a9f;hb=e33b485dcb7bdbe056f6511945d5eb118c085d65;hp=b93848a70a9d04175098695c4606ed0c4d0a2a60;hpb=f99ad333a7acbb6c8c995dbb036484ae8940c490;p=movit

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index b93848a..07d94be 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -1,5 +1,5 @@
-#ifndef _GAMMA_EXPANSION_EFFECT_H 
-#define _GAMMA_EXPANSION_EFFECT_H 1
+#ifndef _MOVIT_GAMMA_EXPANSION_EFFECT_H 
+#define _MOVIT_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
@@ -7,23 +7,33 @@
 //
 // Currently supports sRGB and Rec. 601/709.
 
+#include <string>
+
 #include "effect.h"
-#include "effect_chain.h"
+#include "image_format.h"
 
 #define EXPANSION_CURVE_SIZE 256
 
 class GammaExpansionEffect : public Effect {
-public:
+private:
+	// Should not be instantiated by end users.
 	GammaExpansionEffect();
+	friend class EffectChain;
+
+public:
 	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; }
 
+	// Actually processes its input in a nonlinear fashion,
+	// but does not touch alpha, and we are a special case anyway.
+	virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+
 private:
 	GammaCurve source_curve;
 	float expansion_curve[EXPANSION_CURVE_SIZE];
 };
 
-#endif // !defined(_GAMMA_EXPANSION_EFFECT_H)
+#endif // !defined(_MOVIT_GAMMA_EXPANSION_EFFECT_H)