#pragma once

#include "effects/video_effect.hpp"

namespace effector {

// The blur effect in motion, as a lens being focused: either the whole
// picture drifts out of focus and back, or a band of sharpness travels down
// the picture and back up with the rest blurred, as a tilted lens shows it.
//
// The pull goes there and back once a cycle, so the clip loops without a
// jump; nothing in it is random.
class FocusPullEffect : public VideoEffect {
public:
    std::string name() const override { return "focuspull"; }
    std::string title() const override { return "Focus pull"; }
    std::string description() const override {
        return "Blurs the picture as Blur does, pulling it out of focus and back, or moving a "
               "band of sharpness up and down it.";
    }
    const std::vector<ParamSpec>& params() const override;

protected:
    Image animate(Image input, const ParamValues& values, const Moment& at) const override;
};

}  // namespace effector