watermark quality

[voii]

at writeWatermark function, with current stock function watermark image has bad quality, but base image is good. This is fix:

instead

        //Set image
        if(!$image_save_func($baseImage, $this->tmpfile)){
            throw new Exception("Cannot save file ".$this->tmpfile);
        }

I replaced with

        //Set image
		$img_quality = '';
        if($image_save_func == "ImageJPEG"){ $img_quality = 100; }
		if($image_save_func == 'ImagePNG'){ $img_quality = 9; }
		
        if(!$image_save_func($baseImage, $this->tmpfile, $img_quality)){
            throw new Exception("Cannot save file ".$this->tmpfile);
        }

Now watermark is good quality. Only I dont know how will it work with gif