/**
* Change the opacity of the layer
* $recursive: apply it on sublayers.
*
* @param int $opacity
* @param bool $recursive
*/
public function opacity($opacity, $recursive = true)
{
if ($recursive) {
$layers = $this->layers;
foreach ($layers as $key => $layer) {
$layer->opacity($opacity, true);
$this->layers[$key] = $layer;
}
}
$transparentImage = ImageWorkshopLib::generateImage($this->getWidth(), $this->getHeight());
ImageWorkshopLib::imageCopyMergeAlpha($transparentImage, $this->image, 0, 0, 0, 0, $this->getWidth(), $this->getHeight(), $opacity);
unset($this->image);
$this->image = $transparentImage;
unset($transparentImage);
}
