//
// 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() 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];