public function rotate($angle)
	{
 	    if ($angle>0) $angle = 360-$angle;
        else $angle *=-1;
        $color = imagecolorallocate($this->working_image, 0, 0, 255);
        //$coloralfa = imagecolorallocatealpha($this->working_image, 0, 0, 255, 127);
	$this->working_image = imagerotate($this->working_image, $angle, $color);
        
        //imagealphablending($this->working_image, true);                
        imagecolortransparent($this->working_image, $color);
        //imagesavealpha($this->working_image, true);
        
       /* for ($y = 0; $y < $this->info['height']; $y++)
        { 
            for ($x = 0; $x < $this->info['width']; $x++)
            {
                $pixcolor = $this->getPixColor($this->working_image, $x, $y);
                if ($pixcolor == $color) 
                imagesetpixel($this->working_image, $x, $y, $coloralfa);
            }
        }*/
        
		$this->info['mime'] = 'image/png';
		return $this;
	}

public function rotate($angle)
	{
 	if ($angle>0) $angle = 360-$angle;
        else $angle *=-1;
        $coloralfa = imagecolorallocatealpha($this->working_image, 0, 0, 0, 127);
	$this->working_image = imagerotate($this->working_image, $angle, $coloralfa);
        imagesavealpha($this->working_image, true);

	$this->info['mime'] = 'image/png';
	return $this;
	}