/**
* {@inheritdoc}
*/
public function getColorAt(PointInterface $point)
{
if (!$point->in($this->getSize())) {
throw new RuntimeException(sprintf('Error getting color at point [%s,%s]. The point must be inside the image of size [%s,%s]', $point->getX(), $point->getY(), $this->getSize()->getWidth(), $this->getSize()->getHeight()));
}
$index = imagecolorat($this->resource, $point->getX(), $point->getY());
$info = imagecolorsforindex($this->resource, $index);
return $this->palette->color(array($info['red'], $info['green'], $info['blue']), max(min(100 - (int) round($info['alpha'] / 127 * 100), 100), 0));
}
/**
* Sets colorspace and image type, assigns the palette.
*
* @param PaletteInterface $palette
*
* @throws InvalidArgumentException
*/
private function setColorspace(PaletteInterface $palette)
{
if (!isset(static::$colorspaceMapping[$palette->name()])) {
throw new InvalidArgumentException(sprintf('The palette %s is not supported by Gmagick driver', $palette->name()));
}
$this->gmagick->setimagecolorspace(static::$colorspaceMapping[$palette->name()]);
$this->palette = $palette;
}
/**
* Sets colorspace and image type, assigns the palette.
*
* @param PaletteInterface $palette
*
* @throws InvalidArgumentException
*/
private function setColorspace(PaletteInterface $palette)
{
static $typeMapping = array(PaletteInterface::PALETTE_CMYK => \Imagick::IMGTYPE_TRUECOLORMATTE, PaletteInterface::PALETTE_RGB => \Imagick::IMGTYPE_TRUECOLORMATTE, PaletteInterface::PALETTE_GRAYSCALE => \Imagick::IMGTYPE_GRAYSCALEMATTE);
if (!isset(static::$colorspaceMapping[$palette->name()])) {
throw new InvalidArgumentException(sprintf('The palette %s is not supported by Imagick driver', $palette->name()));
}
$this->imagick->setType($typeMapping[$palette->name()]);
$this->imagick->setColorspace(static::$colorspaceMapping[$palette->name()]);
$this->palette = $palette;
}
