/usr/include/movit/gamma_compression_effect.h is in libmovit-dev 1.6.1-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #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, 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 "image_format.h"
namespace movit {
class GammaCompressionEffect : public Effect {
private:
// Should not be instantiated by end users.
GammaCompressionEffect();
friend class EffectChain;
public:
std::string effect_type_id() const override { return "GammaCompressionEffect"; }
std::string output_fragment_shader() override;
void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override;
bool needs_srgb_primaries() const override { return false; }
bool strong_one_to_one_sampling() const override { return true; }
// Actually needs postmultiplied input as well as outputting it.
// EffectChain will take care of that.
AlphaHandling alpha_handling() const override { return OUTPUT_POSTMULTIPLIED_ALPHA; }
private:
GammaCurve destination_curve;
float uniform_linear_scale, uniform_c[5], uniform_beta;
};
} // namespace movit
#endif // !defined(_MOVIT_GAMMA_COMPRESSION_EFFECT_H)
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