//
// Skembo.cpp
// screensaver
//
// Created by Bob Polis at 2020-10-26
// Copyright (c) 2020 SwiftCoder. All rights reserved.
//

#include "Skembo.hpp"
#include <libscscreensaver.hpp>

class Skembo : public ScreensaverPlugin {
    public:
        Skembo() = default;
        ~Skembo() = default;

        void setup(cairo_t* context, const cairo_rectangle_t& rect) override;
        void draw_frame() override;
        int fps() const override;

    private:
        double _hue {0};
};

ScreensaverPlugin* create_instance() {
    return new Skembo;
}

void Skembo::setup(cairo_t* context, const cairo_rectangle_t& rect) {
    ScreensaverPlugin::setup(context, rect);
    make_black();
}

int Skembo::fps() const {
    return 20;
}

void Skembo::draw_frame() {
    // std::uniform_real_distribution<double> dist {};
    HSB hsb;
    hsb.h = _hue;
    hsb.s = 1;//dist(_eng);
    hsb.b = 0.4;//dist(_eng);
    Color color {hsb};
    RGB rgb {RGB(color)};
    cairo_set_source_rgb(_c, rgb.r, rgb.g, rgb.b);
    cairo_rectangle(_c, _r.x, _r.y, _r.width, _r.height);
    cairo_fill(_c);
    _hue += 1.0;
    if (_hue > 360.0) {
        _hue = 0.0;
    }
}