X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.h;h=92f05171cd4d84ff08ad802cbef89138401c5d48;hp=d161c92d72983eb2ef37d6a362e08931e6746a5e;hb=9224f01a362117deef6f1140c6802fde256fb168;hpb=a592c55caca0fb654bad4ec43b84c46abcee21c2

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index d161c92..92f0517 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -1,16 +1,40 @@
-#ifndef _GAMMA_EXPANSION_EFFECT_H 
-#define _GAMMA_EXPANSION_EFFECT_H 1
+#ifndef _MOVIT_GAMMA_EXPANSION_EFFECT_H 
+#define _MOVIT_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, Rec. 601/709 and Rec. 2020 (10- and 12-bit).
+// Note that Movit's internal formats generally do not have enough accuracy
+// for 12-bit input or output.
+
+#include <GL/glew.h>
+#include <string>
 
 #include "effect.h"
-#include "effect_chain.h"
+#include "image_format.h"
 
 class GammaExpansionEffect : public Effect {
-public:
+private:
+	// Should not be instantiated by end users.
 	GammaExpansionEffect();
-	std::string output_glsl();
+	friend class EffectChain;
+
+public:
+	virtual std::string effect_type_id() const { return "GammaExpansionEffect"; }
+	std::string output_fragment_shader();
+	virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
+
+	virtual bool needs_linear_light() const { return false; }
+	virtual bool needs_srgb_primaries() const { return false; }
+
+	// Actually processes its input in a nonlinear fashion,
+	// but does not touch alpha, and we are a special case anyway.
+	virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
 
 private:
 	GammaCurve source_curve;
 };
 
-#endif // !defined(_GAMMA_EXPANSION_EFFECT_H)
+#endif // !defined(_MOVIT_GAMMA_EXPANSION_EFFECT_H)