X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.h;h=81f42d137392cf7e0c08ba557f3a3d090f708f7f;hp=b93848a70a9d04175098695c4606ed0c4d0a2a60;hb=61e2a7671f7b22227dcdc34dd303ae4fcc802aaa;hpb=f99ad333a7acbb6c8c995dbb036484ae8940c490

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index b93848a..81f42d1 100644
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -1,29 +1,44 @@
-#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 and Rec. 601/709.
+// 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 <epoxy/gl.h>
+#include <string>
 
 #include "effect.h"
-#include "effect_chain.h"
+#include "image_format.h"
 
-#define EXPANSION_CURVE_SIZE 256
+namespace movit {
 
 class GammaExpansionEffect : public Effect {
-public:
+private:
+	// Should not be instantiated by end users.
 	GammaExpansionEffect();
+	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;
-	float expansion_curve[EXPANSION_CURVE_SIZE];
 };
 
-#endif // !defined(_GAMMA_EXPANSION_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_GAMMA_EXPANSION_EFFECT_H)