X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=gamma_compression_effect.h;h=6727e6e905c313e75f98209e1d6a55da56f958f6;hb=6278a96c8e0ea5df9d831ecd5b893f831ddc8297;hp=70163419388281da8b6cb54d3bd2c117dd250cd6;hpb=2ced784c6599cb0b21427481ee17f4c8f6afdada;p=movit

diff --git a/gamma_compression_effect.h b/gamma_compression_effect.h
index 7016341..6727e6e 100644
--- a/gamma_compression_effect.h
+++ b/gamma_compression_effect.h
@@ -1,17 +1,34 @@
 #ifndef _GAMMA_COMPRESSION_EFFECT_H 
 #define _GAMMA_COMPRESSION_EFFECT_H 1
 
+// An effect to convert linear light to the given gamma curve,
+// typically inserted by the framework automatically at the end
+// of the processing chain.
+//
+// Currently supports sRGB and Rec. 601/709.
+
+#include <string>
+
 #include "effect.h"
-#include "effect_chain.h"
+#include "image_format.h"
 
 #define COMPRESSION_CURVE_SIZE 4096
 
 class GammaCompressionEffect : public Effect {
-public:
+private:
+	// Should not be instantiated by end users.
 	GammaCompressionEffect();
+	friend class EffectChain;
+
+public:
+	virtual std::string effect_type_id() const { return "GammaCompressionEffect"; }
 	std::string output_fragment_shader();
 
-	virtual bool needs_srgb_primaries() { return false; }
+	virtual bool needs_srgb_primaries() const { return false; }
+
+	// Actually needs postmultiplied input as well as outputting it.
+	// EffectChain will take care of that.
+	virtual AlphaHandling alpha_handling() const { return OUTPUT_POSTMULTIPLIED_ALPHA; }
 
 private:
 	GammaCurve destination_curve;