Color.php

<?php
namespace Bitrix\Main\File\Image;
 
class Color
{
    protected
        $red,
        $green,
        $blue,
        $alpha;
 
    public function __construct($red = 0, $green = 0, $blue = 0, $alpha = 1.0)
    {
        $this->setRed($red)
            ->setGreen($green)
            ->setBlue($blue)
            ->setAlpha($alpha);
    }
 
    public static function createFromHex($color)
    {
        $color = preg_replace("/[^a-f0-9]/is", "", $color);
        if(strlen($color) != 6)
        {
            $color = "FF0000";
        }
 
        return new static(
            hexdec(substr($color, 0, 2)),
            hexdec(substr($color, 2, 2)),
            hexdec(substr($color, 4, 2))
        );
    }
 
    public function toHex()
    {
        return sprintf("#%02x%02x%02x", $this->getRed(), $this->getGreen(), $this->getBlue());
    }
 
    public function toRgba()
    {
        return sprintf("rgba(%d, %d, %d, %0.4f)", $this->getRed(), $this->getGreen(), $this->getBlue(), $this->getAlpha());
    }
 
    public function getRed()
    {
        return $this->red;
    }
 
    public function setRed($red)
    {
        if($red < 0 || $red > 255)
        {
            $red = 0;
        }
        $this->red = (int)$red;
        return $this;
    }
 
    public function getGreen()
    {
        return $this->green;
    }
 
    public function setGreen($green)
    {
        if($green < 0 || $green > 255)
        {
            $green = 0;
        }
        $this->green = (int)$green;
        return $this;
    }
 
    public function getBlue()
    {
        return $this->blue;
    }
 
    public function setBlue($blue)
    {
        if($blue < 0 || $blue > 255)
        {
            $blue = 0;
        }
        $this->blue = (int)$blue;
        return $this;
    }
 
    public function getAlpha()
    {
        return $this->alpha;
    }
 
    public function setAlpha($alpha)
    {
        $this->alpha = (float)$alpha;
        return $this;
    }
}