X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=gamma_expansion_effect.h;h=059b246325f62bc24ad688edc8064effb575d418;hb=37f56fcbe571b2322243f6de59494bf9e0cbb37a;hp=ce999902f7be24b4ddace89ea12384cb7dbf5def;hpb=b10c546f579c7ccb5939161e61a71cd18a3f9bbd;p=movit

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index ce99990..059b246 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -7,14 +7,21 @@
 //
 // 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();