X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_compression_effect.h;h=2744d2ddf65f809e96a301cdcb0e016e499c8f25;hp=70163419388281da8b6cb54d3bd2c117dd250cd6;hb=2ee9c77ad76449314d28d62f60e10d80039c2353;hpb=2ced784c6599cb0b21427481ee17f4c8f6afdada

diff --git a/gamma_compression_effect.h b/gamma_compression_effect.h
index 7016341..2744d2d 100644
--- a/gamma_compression_effect.h
+++ b/gamma_compression_effect.h
@@ -1,17 +1,32 @@
 #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 "effect.h"
 #include "effect_chain.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_ALPHA_POSTMULTIPLIED; }
 
 private:
 	GammaCurve destination_curve;