/**
* {@inheritdoc}
*/
public function current()
{
if (!isset($this->layers[$this->offset])) {
try {
$this->resource->setimageindex($this->offset);
$this->layers[$this->offset] = $this->resource->getimage();
} catch (\GmagickException $e) {
throw new RuntimeException(sprintf('Failed to extract layer %d', $this->offset), $e->getCode(), $e);
}
}
return new Image($this->layers[$this->offset]);
}
/**
* Tries to extract layer at given offset
*
* @param integer $offset
* @return Image
* @throws RuntimeException
*/
private function extractAt($offset)
{
if (!isset($this->layers[$offset])) {
try {
$this->resource->setimageindex($offset);
$this->layers[$offset] = new Image($this->resource->getimage(), $this->palette, new MetadataBag());
} catch (\GmagickException $e) {
throw new RuntimeException(sprintf('Failed to extract layer %d', $offset), $e->getCode(), $e);
}
}
return $this->layers[$offset];
}