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color.cpp
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color.cpp
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#include "color.h"
Color::Color () {
}
Color::Color (const uint8_t &r, const uint8_t &g, const uint8_t &b, const uint8_t &alpha) {
this->r = r;
this->g = g;
this->b = b;
this->alpha = alpha;
}
//converts GRBa color to GRB color
uint32_t Color::RGBa_to_RGB (const uint32_t &RGBa) const {
uint32_t val_RGB = 0;
uint8_t r, g, b, alpha;
//gets the individual channels
r = getChannel (chR, RGBa);
g = getChannel (chG, RGBa);
b = getChannel (chB, RGBa);
alpha = getChannel (chAlpha, RGBa);
//scales the individual color channels by the alpha channel
r *= (alpha / 255.0);
g *= (alpha / 255.0);
b *= (alpha / 255.0);
//stores the resulting RGB color
val_RGB = b;
val_RGB = val_RGB << 8;
val_RGB |= r;
val_RGB = val_RGB << 8;
val_RGB |= g;
return val_RGB;
}
//generates a GRBa color, is only used for debugging purposes, could be used later on for advanced strip effects as a helper function
uint32_t Color::generateRGBa (const uint8_t &r, const uint8_t &g, const uint8_t &b, const uint8_t &alpha) const {
uint32_t RGBa = 0;
//shifts the individual channels on the right position
RGBa = alpha;
RGBa = RGBa << 8;
RGBa |= b;
RGBa = RGBa << 8;
RGBa |= r;
RGBa = RGBa << 8;
RGBa |= g;
return RGBa;
}
Color Color::operator= (const Color color) {
this->r = color.getCh_r();
this->g = color.getCh_g();
this->b = color.getCh_b();
this->alpha = color.getCh_alpha();
}
void Color::setColorRGB (uint32_t color) {
g = color & B11111111;
color = color >> 8;
r = color & B11111111;
color = color >> 8;
b = color & B11111111;
alpha = 255;
}
//returns a desired channel of a RGBa color, use the Channels enum for selection of the channel
uint8_t Color::getChannel (uint8_t channel, const uint32_t &RGBa) const {
return (RGBa >> (8 * channel)) & B11111111;
}