-#ifndef _GAMMA_COMPRESSION_EFFECT_H
-#define _GAMMA_COMPRESSION_EFFECT_H 1
+#ifndef _MOVIT_GAMMA_COMPRESSION_EFFECT_H
+#define _MOVIT_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();
- std::string output_glsl();
+ friend class EffectChain;
+
+public:
+ virtual std::string effect_type_id() const { return "GammaCompressionEffect"; }
+ std::string output_fragment_shader();
+
+ 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;
+ float compression_curve[COMPRESSION_CURVE_SIZE];
};
-#endif // !defined(_GAMMA_COMPRESSION_EFFECT_H)
+#endif // !defined(_MOVIT_GAMMA_COMPRESSION_EFFECT_H)