<?

$imagem=$_GET['pathimagem'];
$SetX=$_GET['SetX'];
$SetY=$_GET['SetY'];

        $i = new imagethumbnail();
        $i->open("$imagem"); // coloque aqui o nome do arquivo original
        $i->setY($SetY);
       
        
        header("Content-type: image/jpeg;");
        $i->imagejpeg();

        class imagethumbnail {
        
                var $filename;
                var $x;
                var $y;
                var $image;
                var $thumbnail;

                function imagethumbnail() {

                }
                
                function open($filename) {

                        $this->filename = $filename;
                        $imageinfo = array();
                        $imageinfo = getimagesize($this->filename,$imageinfo);
                        
                        $this->old_x = $imageinfo[0];
                        $this->old_y = $imageinfo[1];
                                                
                        switch ($imageinfo[2]) {
                                case "1": $this->image = imagecreatefromgif($this->filename); break;
                                case "2": $this->image = imagecreatefromjpeg($this->filename); break;
                                case "3": $this->image = imagecreatefrompng($this->filename); break;
                        }
                        
                }

                function setX($x="") {
                        if (isset($x)) { $this->x = $x; }
                        return $this->x;
                }

                function setY($y="") {
                        if (isset($y)) { $this->y = $y; }
                        return $this->y;
                }

                function generate() {

                        if ($this->x > 0 and $this->y > 0) {
                                $new_x = $this->x;
                                $new_y = $this->y;
                        } elseif ($this->x > 0 and $this->x != "") {
                                $new_x = $this->x;
                                $new_y = ($this->x/$this->old_x)*$this->old_y;
                        } else {
                                $new_x = ($this->y/$this->old_y)*$this->old_x;
                                $new_y = $this->y;
                        }


if ($new_x>$_GET['SetX']) { $new_x=$_GET['SetX']; }


                        $this->thumbnail = imagecreatetruecolor($new_x,$new_y);
                        $white = imagecolorallocate($this->thumbnail,255,255,255);
                        imagefill($this->thumbnail,0,0,$white);

                        imagecopyresampled ( $this->thumbnail, $this->image, 0, 0, 0, 0, $new_x, $new_y, $this->old_x, $this->old_y);

                }

                function imagegif($filename="") {
                        if (!isset($this->thumbnail)) { $this->generate(); }
                        imagetruecolortopalette($this->thumbnail,0,256);
                        if ($filename=="") {
                                imagegif($this->thumbnail);
                        } else {
                                imagegif($this->thumbnail,$filename);
                        }
                }

                function imagejpeg($filename="",$quality=80) {
                        if (!isset($this->thumbnail)) { $this->generate(); }
                        imagejpeg($this->thumbnail,$filename,$quality);
		}

                function imagepng($filename="") {
                        if (!isset($this->thumbnail)) { $this->generate(); }
                        if ($filename=="") {
                                imagepng($this->thumbnail);
                        } else {
                                imagepng($this->thumbnail,$filename);
                        }
                }

        } 
?>