/**
* Gets specifically formatted color string from Color instance
*
* @param ColorInterface $color
*
* @return \ImagickPixel
*/
private function getColor(ColorInterface $color)
{
$pixel = new \ImagickPixel((string) $color);
$pixel->setColorValue(\Imagick::COLOR_ALPHA, $color->getAlpha() / 100);
return $pixel;
}
/**
* Gets specifically formatted color string from Color instance
*
* @param ColorInterface $color
*
* @return \ImagickPixel
*/
private function getColor(ColorInterface $color)
{
$pixel = new \ImagickPixel((string) $color);
$pixel->setColorValue(\Imagick::COLOR_ALPHA, number_format(round($color->getAlpha() / 100, 2), 1));
return $pixel;
}
/**
* {@inheritdoc}
*/
public function blend(ColorInterface $color1, ColorInterface $color2, $amount)
{
if (!$color1 instanceof GrayColor || !$color2 instanceof GrayColor) {
throw new RuntimeException('Grayscale palette can only blend Grayscale colors');
}
return $this->color(array((int) min(255, min($color1->getGray(), $color2->getGray()) + round(abs($color2->getGray() - $color1->getGray()) * $amount))), (int) min(100, min($color1->getAlpha(), $color2->getAlpha()) + round(abs($color2->getAlpha() - $color1->getAlpha()) * $amount)));
}
/**
* Gets specifically formatted color string from Color instance
*
* @param ColorInterface $color
*
* @return string
*/
private function getColor(ColorInterface $color)
{
if (!$color->isOpaque()) {
throw new InvalidArgumentException('Gmagick doesn\'t support transparency');
}
$pixel = new \GmagickPixel((string) $color);
$pixel->setColorValue(\Gmagick::COLOR_OPACITY, number_format(abs(round($color->getAlpha() / 100, 1)), 1));
return $pixel;
}
/**
* Internal
*
* Generates a GD color from Color instance
*
* @param ColorInterface $color
*
* @return integer A color identifier
*
* @throws RuntimeException
* @throws InvalidArgumentException
*/
private function getColor(ColorInterface $color)
{
if (!$color instanceof RGBColor) {
throw new InvalidArgumentException('GD driver only supports RGB colors');
}
$index = imagecolorallocatealpha($this->resource, $color->getRed(), $color->getGreen(), $color->getBlue(), round(127 * (100 - $color->getAlpha()) / 100));
if (false === $index) {
throw new RuntimeException(sprintf('Unable to allocate color "RGB(%s, %s, %s)" with transparency of %d percent', $color->getRed(), $color->getGreen(), $color->getBlue(), $color->getAlpha()));
}
return $index;
}
