protected function prepareDimensions($width, $height, $scaleMethod)
	{
		// Instantiate variables.
		$dimensions = new \stdClass;

		switch ($scaleMethod)
		{
			case self::SCALE_FILL:
				$dimensions->width = (int) round($width);
				$dimensions->height = (int) round($height);
				break;

			case self::SCALE_INSIDE:
			case self::SCALE_OUTSIDE:
			case self::SCALE_FIT:
				$rx = ($width > 0) ? ($this->getWidth() / $width) : 0;
				$ry = ($height > 0) ? ($this->getHeight() / $height) : 0;

				if ($scaleMethod != self::SCALE_OUTSIDE)
				{
					$ratio = max($rx, $ry);
				}
				else
				{
					$ratio = min($rx, $ry);
				}

				$dimensions->width = (int) round($this->getWidth() / $ratio);
				$dimensions->height = (int) round($this->getHeight() / $ratio);
				break;

			default:
				throw new \InvalidArgumentException('Invalid scale method.');
				break;
		}

		return $dimensions;
	}