84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
#include "Huey.hpp"
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#include <libsccolor.hpp>
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#include <libscscreensaver.hpp>
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#include <sstream>
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#include <iomanip>
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class Huey : public ScreensaverPlugin {
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public:
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Huey() = default;
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~Huey() = default;
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int fps() const override;
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void update() override;
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void render() 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 Huey;
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}
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int Huey::fps() const {
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return 50;
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}
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void Huey::update() {
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}
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void Huey::render() {
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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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// build hue text
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std::ostringstream hue_oss;
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hue_oss << "hue: " << std::setw(3) << static_cast<int>(_hue) << "°";
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hue_oss << ", saturation: " << static_cast<int>(hsb.s * 100) << "%";
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hue_oss << ", brightness: " << static_cast<int>(hsb.b * 100) << "%";
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// build rgb text
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std::ostringstream rgb_oss;
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rgb_oss << "red: " << std::setw(3) << static_cast<int>(255 * rgb.r);
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rgb_oss << ", green: " << std::setw(3) << static_cast<int>(255 * rgb.g);
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rgb_oss << ", blue: " << std::setw(3) << static_cast<int>(255 * rgb.b);
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// font setup
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cairo_select_font_face(_c, "Hack", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size(_c, 24);
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// render hue and rgb texts in black (shadow)
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cairo_set_source_rgb(_c, 0, 0, 0);
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cairo_move_to(_c, 31, 51);
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cairo_show_text(_c, hue_oss.str().c_str());
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cairo_move_to(_c, 31, 87);
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cairo_show_text(_c, rgb_oss.str().c_str());
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// render hue and rgb texts in white, slightly offset
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cairo_set_source_rgb(_c, 1, 1, 1);
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cairo_move_to(_c, 29, 49);
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cairo_show_text(_c, hue_oss.str().c_str());
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cairo_move_to(_c, 29, 85);
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cairo_show_text(_c, rgb_oss.str().c_str());
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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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