<?php
/**
 * Image Input Output Tools
 */
class ImgIOTools {
	public static $maxScreenWidth = 1067; //screen dimensions

	public static $maxScreenHeight = 600;

	/**
	 * Flushes image to screen
	 * @param Imagick $im
	 * @return void
	 */
	public static function onScreen(Imagick $img) {
		$img->scaleImage(self::$maxScreenWidth, self::$maxScreenHeight, true);

		//$img = self::scaleByLength($img, $this->maxScreenWidth, $this->maxScreenHeight);
		header('Content-type: image/' . ZAP_IMG_TYPE);
		echo $img->getImageBlob();
     }

	/**
	 * Puts image from $imgUrl (if exists) onscreen
	 * @param string $imgUrl
	 * @return boolean or imagedata
	 */
	public static function urlOnScreen($imgUrl) {
		if (file_exists($imgUrl)) {
			$img = new Imagick($imgUrl);
			self::onScreen($img);
		} else {
			return false;
		}
	}

	/**
	 * Saves active image from $im as $filename.$filetype  in $folder
	 * @param Imagick $im
	 * @param string $folder
	 * @param string $filename
	 * @param string $filetype
	 * @return boolean
	 */
	public static function saveImg(Imagick $img, $folder, $filename) {
		$path = $folder . $filename . '.' . ZAP_IMG_TYPE;
		return $img->writeImage($path);
	}
}
?>