+ friend class EffectChain;
+
+public:
+ std::string effect_type_id() const override { return "GammaExpansionEffect"; }
+ std::string output_fragment_shader() override;
+ void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override;
+
+ bool needs_linear_light() const override { return false; }
+ bool needs_srgb_primaries() const override { return false; }
+ bool strong_one_to_one_sampling() const override { return true; }
+
+ // Actually processes its input in a nonlinear fashion,
+ // but does not touch alpha, and we are a special case anyway.
+ AlphaHandling alpha_handling() const override { return DONT_CARE_ALPHA_TYPE; }