// A circular vignette, falling off as cosĀ² of the distance from the center
// (the classic formula for approximating a real lens).
+#include <GL/glew.h>
+#include <string>
+
#include "effect.h"
class VignetteEffect : public Effect {
std::string output_fragment_shader();
virtual bool needs_srgb_primaries() const { return false; }
+ virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);