X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.h;h=79926176ddf21688b80a8739ed991ec701d00b81;hp=f079e7085f6e7ba6f6721f8aa3142e9ddb2f88e6;hb=05ae48a62f4a507c1eef75b9220f88f2b9fda563;hpb=2ced784c6599cb0b21427481ee17f4c8f6afdada

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index f079e70..7992617 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -1,6 +1,12 @@
 #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"
 
@@ -11,8 +17,8 @@ public:
 	GammaExpansionEffect();
 	std::string output_fragment_shader();
 
-	virtual bool needs_linear_light() { return false; }
-	virtual bool needs_srgb_primaries() { return false; }
+	virtual bool needs_linear_light() const { return false; }
+	virtual bool needs_srgb_primaries() const { return false; }
 
 private:
 	GammaCurve source_curve;