54 lines
974 B
C++
54 lines
974 B
C++
//
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// Skembo.cpp
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// screensaver
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//
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// Created by Bob Polis at 2020-10-26
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// Copyright (c) 2020 SwiftCoder. All rights reserved.
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//
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#include "Skembo.hpp"
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#include <libscscreensaver.hpp>
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class Skembo : public ScreensaverPlugin {
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public:
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Skembo() = default;
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~Skembo() = default;
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int fps() const override;
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void draw_frame() override;
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private:
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double _hue {0};
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};
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ScreensaverPlugin* create_instance() {
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return new Skembo;
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}
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int Skembo::fps() const {
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return 40;
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}
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void Skembo::draw_frame() {
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// next color
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HSB hsb;
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hsb.h = _hue;
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hsb.s = 1.0;
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hsb.b = 0.4;
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// convert to rgb
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Color color {hsb};
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RGB rgb {RGB(color)};
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// setup color, fill whole window
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cairo_set_source_rgb(_c, rgb.r, rgb.g, rgb.b);
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cairo_rectangle(_c, _r.x, _r.y, _r.width, _r.height);
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cairo_fill(_c);
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// update for next frame
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_hue += 0.5;
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if (_hue > 360.0) {
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_hue -= 360.0;
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}
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}
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