X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.h;h=cc65e4fa48924022cf5f3d05e70693cd06809b36;hp=b93848a70a9d04175098695c4606ed0c4d0a2a60;hb=f7e302b40026b15d1606269324a31953a1eadb80;hpb=f99ad333a7acbb6c8c995dbb036484ae8940c490

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index b93848a..cc65e4f 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -7,20 +7,30 @@
 //
 // 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];