gigawidgets/glow_8hpp_source.html

#pragma once


#include "../../core/color.hpp"

#include "../../core/coords.hpp"

#include "../../core/size.hpp"


namespace ui {

namespace shader {


template <unsigned int frequency>


color_t glow(color_t pixel, const Coords &coords, const Size &size, time_t time) {

    float r, g, b;

    colorComponents(pixel, r, g, b);


    float ratio = .5f - sin(time * (6.283f / (float)frequency)) / 2.f;


    return blend(pixel, ui::COLOR_WHITE, ratio);

}


} // namespace shader

} // namespace ui

ui::colorComponents
void colorComponents(color_t color, float &red, float &green, float &blue)
Split an RGB565 color value into normalized components.

ui::blend
color_t blend(color_t color1, color_t color2, float ratio=0.5f)
Blend two colors, preserving apparent brightness.

ui::color_t
uint16_t color_t
An RGB565 color value. 5 bits red, 6 bits green, 5 bits blue.
Definition color.hpp:13

ui::COLOR_WHITE
@ COLOR_WHITE
Definition color.hpp:87

ui::shader::glow
color_t glow(color_t pixel, const Coords &coords, const Size &size, time_t time)
A pixel shader that smoothly cycles between an image's original color and white.
Definition glow.hpp:20

ui::Coords
A struct for storing the pixel coordinates of various UI elements.
Definition coords.hpp:17

ui::Size
A struct that holds the number of pixels that a widget would take up on the screen.
Definition size.hpp:17