GD Lib - resize ser ud af h... til!

Kode 

class JaRS{
	var $image;
	
	// Constructor
	function JaRS($imagefile){
		$this->image["imagefile"] = $imagefile;
		// Get the extension
		$this->image["extension"] = strtolower(end(explode(".", $imagefile)));
		
		// Get image dimensions
		list($this->image["width"], $this->image["height"]) = getimagesize($this->image["imagefile"]);
		// Sets the new height and width to the orginal height and width
		$this->image["new_width"] = $this->image["width"];
		$this->image["new_height"] = $this->image["height"];
		
		// Sets default quality - Only for jpg/jpeg
		$this->image["quality"] = 75;
		
		// jpg/jpeg
		if($this->image["extension"] == "jpg" || $this->image["extension"] == "jpeg" ){
			// Try to load the image
			$this->image["imagesrc"] = @imagecreatefromjpeg($imagefile);
			if(!$this->image["imagesrc"]){
				die("Couldn't load the image (" . $imagefile . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
			}
		}
		// gif
		elseif($this->image["extension"] == "gif"){
			$this->image["imagesrc"] = @imagecreatefromgif($imagefile);
			if(!$this->image["imagesrc"]){
				die("Couldn't load the image (" . $imagefile . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
			}
		}
		// png
		elseif($this->image["extension"] == "png"){
			$this->image["imagesrc"] = @imagecreatefrompng($imagefile);
			if(!$this->image["imagesrc"]){
				die("Couldn't load the image (" . $imagefile . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
			}
		}
		else{
			die("The format (" . $this->image["extension"] . ") is not supportet");
		}
	}
	
	function set_quality($quality=75){
		$this->image["quality"] = $quality;
	}
	
	function set_width($width, $maxheight=""){
		// Calculate the new dimensions
		$this->image["new_width"] = $width;
		$this->image["new_height"] = ($this->image["new_width"]/$this->image["width"])*$this->image["height"];
		
		// If the new_height exceeds the maxheight
		if ($maxheight != ""){
			if ($this->image["new_height"] > $maxheight){
				$this->image["new_height"] = $maxheight;
				$this->image["new_width"] = ($this->image["new_height"]/$this->image["height"])*$this->image["width"];
			}
		}
	}
	
	function set_height($height, $maxwidth=""){
		// Calculate the new dimensions
		$this->image["new_height"] = $height;
		$this->image["new_width"] = ($this->image["new_height"]/$this->image["height"])*$this->image["width"];
		
		// If the new_width exceeds the maxheight
		if ($maxwidth != ""){
			if ($this->image["new_width"] > $maxwidth){
				$this->image["new_width"] = $maxwidth;
				$this->image["new_height"] = ($this->image["new_width"]/$this->image["width"])*$this->image["height"];
			}
		}
	}
	
	function generate_image($watermark = ""){
		if(!isset($this->image["new_width"]) && !isset($this->image["new_height"])){
			return false;
		}
		// Creates the new image
		$this->image["newimage"] = imagecreatetruecolor($this->image["new_width"], $this->image["new_height"]);
		imagecopyresampled($this->image["newimage"], $this->image["imagesrc"], 0, 0, 0, 0, $this->image["new_width"], $this->image["new_height"], $this->image["width"], $this->image["height"]);
		
		// Copy a watermark onto the image if watermark is set
		if($watermark != ""){
			// Get the watermark extension
			$watermark_extension = (strtolower(end(explode(".", $watermark))));
			
			// jpg/jpeg
			if($watermark_extension == "jpg" || $watermark == "jpeg" ){
				$watermark_image = @imagecreatefromjpeg($watermark);
				if(!$watermark_image){
					die("Couldn't load the image (" . $watermark . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
				}
			}
			// gif
			elseif($watermark_extension == "gif"){
				$watermark_image = @imagecreatefromgif($watermark);
				if(!$watermark_image){
					die("Couldn't load the image (" . $watermark . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
				}
			}
			// png
			elseif($watermark_extension == "png"){
				$watermark_image = @imagecreatefrompng($watermark);
				if(!$watermark_image){
					die("Couldn't load the image (" . $watermark . ") Make sure the file exists, you have the right permissions and that the file is a valid " . $this->image["extension"] . " file.");
				}
			}
			else{
				die("The format (" . $watermark_extension . ") is not supportet");
			}
			// Get the dimensions of the watermark
			list($watermark_width, $watermark_height) = getimagesize($watermark);
			imagecopy($this->image["newimage"], $watermark_image, $this->image["new_width"]-$watermark_width, $this->image["new_height"]-$watermark_height, 0, 0, $watermark_width, $watermark_height);
			}
		
		// Return the generated image
		return $this->image["newimage"];
	}
	
	function show_image($watermark = ""){
		if($watermark != ""){
			if(!$tmpimage = $this->generate_image($watermark)){
				$error = 1;
			}
		}
		elseif($watermark == ""){
			if(!$tmpimage = $this->generate_image()){
				$error = 1;
			}
		}
		if($error != 1){
			// Outputs the image
			header("Content-type: image/" . $this->image["extension"]);
			
			if($this->image["extension"] == "jpg" || $this->image["extension"] == "jpeg"){
				imagejpeg($tmpimage, NULL, $this->image["quality"]);
			}
			if($this->image["extension"] == "gif"){
				imagegif($tmpimage);
			}
			if($this->image["extension"] == "png"){
				imagepng($tmpimage);
			}
		}
		else{
			die("Something weird is happening. You shouldn't really see this");
		}
	}
	function save_image($filename, $watermark = ""){
		if($watermark != ""){
			if(!$tmpimage = $this->generate_image($watermark)){
				$error = 1;
			}
		}
		elseif($watermark == ""){
			if(!$tmpimage = $this->generate_image()){
				$error = 1;
			}
		}
		if($error != 1){			
			if($this->image["extension"] == "jpg" || $this->image["extension"] == "jpeg"){
				imagejpeg($tmpimage, $filename, $this->image["quality"]);
			}
			if($this->image["extension"] == "gif"){
				imagegif($tmpimage, $filename);
			}
			if($this->image["extension"] == "png"){
				imagepng($tmpimage, $filename);
			}
		}
		else{
			die("Something weird is happening. You shouldn't really see this");
		}
	}
	
}
?>