1 #ifndef _VIGNETTE_EFFECT_H
2 #define _VIGNETTE_EFFECT_H 1
4 // A circular vignette, falling off as cosĀ² of the distance from the center
5 // (the classic formula for approximating a real lens).
9 class VignetteEffect : public Effect {
12 std::string output_fragment_shader();
14 virtual bool needs_srgb_primaries() const { return false; }
16 void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
20 float radius, inner_radius;
23 #endif // !defined(_VIGNETTE_EFFECT_H)