Файл: concrete5.7.5.6/concrete/vendor/imagine/imagine/lib/Imagine/Image/Palette/Color/RGB.php
Строк: 155
<?php
/*
* This file is part of the Imagine package.
*
* (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ImagineImagePaletteColor;
use ImagineImagePaletteRGB as RGBPalette;
use ImagineExceptionInvalidArgumentException;
final class RGB implements ColorInterface
{
/**
* @var integer
*/
private $r;
/**
* @var integer
*/
private $g;
/**
* @var integer
*/
private $b;
/**
* @var integer
*/
private $alpha;
/**
*
* @var RGBPalette
*/
private $palette;
public function __construct(RGBPalette $palette, array $color, $alpha)
{
$this->palette = $palette;
$this->setColor($color);
$this->setAlpha($alpha);
}
/**
* {@inheritdoc}
*/
public function getValue($component)
{
switch ($component) {
case ColorInterface::COLOR_RED:
return $this->getRed();
case ColorInterface::COLOR_GREEN:
return $this->getGreen();
case ColorInterface::COLOR_BLUE:
return $this->getBlue();
default:
throw new InvalidArgumentException(sprintf('Color component %s is not valid', $component));
}
}
/**
* Returns RED value of the color
*
* @return integer
*/
public function getRed()
{
return $this->r;
}
/**
* Returns GREEN value of the color
*
* @return integer
*/
public function getGreen()
{
return $this->g;
}
/**
* Returns BLUE value of the color
*
* @return integer
*/
public function getBlue()
{
return $this->b;
}
/**
* {@inheritdoc}
*/
public function getPalette()
{
return $this->palette;
}
/**
* {@inheritdoc}
*/
public function getAlpha()
{
return $this->alpha;
}
/**
* {@inheritdoc}
*/
public function dissolve($alpha)
{
return $this->palette->color(array($this->r, $this->g, $this->b), $this->alpha + $alpha);
}
/**
* {@inheritdoc}
*/
public function lighten($shade)
{
return $this->palette->color(
array(
min(255, $this->r + $shade),
min(255, $this->g + $shade),
min(255, $this->b + $shade),
), $this->alpha
);
}
/**
* {@inheritdoc}
*/
public function darken($shade)
{
return $this->palette->color(
array(
max(0, $this->r - $shade),
max(0, $this->g - $shade),
max(0, $this->b - $shade),
), $this->alpha
);
}
/**
* {@inheritdoc}
*/
public function grayscale()
{
$gray = min(255, round(0.299 * $this->getRed() + 0.114 * $this->getBlue() + 0.587 * $this->getGreen()));
return $this->palette->color(array($gray, $gray, $gray), $this->alpha);
}
/**
* {@inheritdoc}
*/
public function isOpaque()
{
return 100 === $this->alpha;
}
/**
* Returns hex representation of the color
*
* @return string
*/
public function __toString()
{
return sprintf('#%02x%02x%02x', $this->r, $this->g, $this->b);
}
/**
* Internal
*
* Performs checks for validity of given alpha value and sets it
*
* @param integer $alpha
*
* @throws InvalidArgumentException
*/
private function setAlpha($alpha)
{
if (!is_int($alpha) || $alpha < 0 || $alpha > 100) {
throw new InvalidArgumentException(sprintf('Alpha must be an integer between 0 and 100, %s given', $alpha));
}
$this->alpha = $alpha;
}
/**
* Internal
*
* Performs checks for color validity (array of array(R, G, B))
*
* @param array $color
*
* @throws InvalidArgumentException
*/
private function setColor(array $color)
{
if (count($color) !== 3) {
throw new InvalidArgumentException('Color argument must look like array(R, G, B), where R, G, B are the integer values between 0 and 255 for red, green and blue color indexes accordingly');
}
list($this->r, $this->g, $this->b) = array_values($color);
}
}