Hi guys,

I'm looking for the best solution to add watermarks to my image gallery: http://ace.clickheredigital.co.uk/roofing-photo-gallery/
and my watermark is stored here: http://ace.clickheredigital.co.uk/themes/Ace/images/watermark.png

I've read all of the related threads on here (which look great) but im not much of a developer and don't really understand where I need to put the codes...

can anybody post a short tutorial for me? :)
im working with uncle cheese's Image_gallery

ANY help at all would be greatly appreciated.

do i do something like this

	public function Watermark(GD $gd) {
	// Read the watermark picture
	$watermark = imagecreatefrompng($URL . '/themes/Ace/images/watermark.png');
	$watermark_width = imagesx($watermark);
	$watermark_height = imagesy($watermark);

	// Read Full size Silverstripe image
	$imageToWatermark = imagecreatefromjpeg($this->URL);

	// Calculate sizes
	$size = getimagesize($this->URL);
	$dest_x = $size[0] - $watermark_width - 5;
	$dest_y = $size[1] - $watermark_height - 5;
      
	// Do transformations and save image in assets
	imagecopymerge($imageToWatermark, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 40);
	imagepng($imageToWatermark,$webroot . $this->filename . "_watermarked.png");
	
	// And this is the trick ;-) Create an object Silverstripe can work with....
	$GDoutput= new GD($webroot . $this->filename . "_watermarked.png");
	return $GDoutput;
	}

where do i put this??