/**
* Index a sublayer in the layer stack
* Return an array containing the generated sublayer id and its final level:
* array("layerLevel" => integer, "id" => integer).
*
* @param int $layerLevel
* @param ImageWorkshopLayer $layer
* @param int $positionX
* @param int $positionY
* @param string $position
*
* @return array
*/
protected function indexLayer($layerLevel, $layer, $positionX, $positionY, $position)
{
// Choose an id for the added layer
$layerId = $this->lastLayerId + 1;
// Clone $layer to duplicate image resource var
$layer = clone $layer;
// Add the layer in the stack
$this->layers[$layerId] = $layer;
// Add the layer positions in the main layer
$this->layerPositions[$layerId] = ImageWorkshopLib::calculatePositions($this->getWidth(), $this->getHeight(), $layer->getWidth(), $layer->getHeight(), $positionX, $positionY, $position);
// Update the lastLayerId of the workshop
$this->lastLayerId = $layerId;
// Add the layer level in the stack
$layerLevel = $this->indexLevelInDocument($layerLevel, $layerId);
return array('layerLevel' => $layerLevel, 'id' => $layerId);
}
