/**
* {@inheritdoc}
*/
public function offsetSet($offset, $image)
{
if (!$image instanceof Image) {
throw new InvalidArgumentException('Only a Gmagick Image can be used as layer');
}
if (null === $offset) {
$offset = count($this) - 1;
} else {
if (!is_int($offset)) {
throw new InvalidArgumentException('Invalid offset for layer, it must be an integer');
}
if (count($this) < $offset || 0 > $offset) {
throw new OutOfBoundsException(sprintf('Invalid offset for layer, it must be a value between 0 and %d, %d given', count($this), $offset));
}
if (isset($this[$offset])) {
unset($this[$offset]);
$offset = $offset - 1;
}
}
$frame = $image->getGmagick();
try {
if (count($this) > 0) {
$this->resource->setimageindex($offset);
$this->resource->nextimage();
}
$this->resource->addimage($frame);
/**
* ugly hack to bypass issue https://bugs.php.net/bug.php?id=64623
*/
if (count($this) == 2) {
$this->resource->setimageindex($offset + 1);
$this->resource->nextimage();
$this->resource->addimage($frame);
unset($this[0]);
}
} catch (\GmagickException $e) {
throw new RuntimeException('Unable to set the layer', $e->getCode(), $e);
}
$this->layers = array();
}
