+ friend class EffectChain;
+
+public:
+ virtual std::string effect_type_id() const { return "GammaExpansionEffect"; }
+ std::string output_fragment_shader();
+
+ 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; }