Update SimpleImage.class.php

SimpleImage.class.php

<?php

/* [...] */

	//
	// Save an image
	//
	//		$filename - the filename to save to (defaults to original file)
	//		$quality - 0-100 percent for PNG or JPG
	//
	//	Notes:
	//
	//		The resulting format will be determined by the file extension.
	//
	public function save($filename = null, $quality = null) {
		
		if( !$filename ) $filename = $this->filename;
		
		// Determine format via file extension (fall back to original format)
		$format = $this->file_ext($filename);
		if( !$format ) $format = $this->original_info['format'];
		
		// Determine output format
		switch( $format ) {
			
			case 'gif':
				$result = imagegif($this->image, $filename);
				break;
			
			case 'jpg':
			case 'jpeg':
				if($quality === null || $quality > 100) {
					$quality = 85;
				}
				$quality = $this->keep_within($quality, 0, 100);
				$result = imagejpeg($this->image, $filename, $quality);
				break;
			
			case 'png':
				if($quality === null || $quality > 90) {
					$quality = 90;
				}
				$quality = intval($quality / 10);
				$quality = $this->keep_within($quality, 0, 9);
				$result = imagepng($this->image, $filename, $quality);
				break;

/* [...] */

?>