<?php
namespace Szurubooru\Services\ImageManipulation;
use Szurubooru\Services\ImageManipulation\GdImageManipulator;
use Szurubooru\Services\ImageManipulation\ImagickImageManipulator;

class ImageManipulator implements IImageManipulator
{
	private $strategy;

	public function __construct(
		ImagickImageManipulator $imagickImageManipulator,
		GdImageManipulator $gdImageManipulator)
	{
		if (extension_loaded('imagick'))
		{
			$this->strategy = $imagickImageManipulator;
		}
		else if (extension_loaded('gd'))
		{
			$this->strategy = $gdImageManipulator;
		}
		else
		{
			throw new \RuntimeException('Neither imagick or gd image extensions are enabled');
		}
	}

	public function loadFromBuffer($source)
	{
		return $this->strategy->loadFromBuffer($source);
	}

	public function getImageWidth($imageResource)
	{
		return $this->strategy->getImageWidth($imageResource);
	}

	public function getImageHeight($imageResource)
	{
		return $this->strategy->getImageHeight($imageResource);
	}

	public function resizeImage(&$imageResource, $width, $height)
	{
		return $this->strategy->resizeImage($imageResource, $width, $height);
	}

	public function cropImage(&$imageResource, $width, $height, $originX, $originY)
	{
		return $this->strategy->cropImage($imageResource, $width, $height, $originX, $originY);
	}

	public function saveToBuffer($source, $format)
	{
		return $this->strategy->saveToBuffer($source, $format);
	}
}