File Uploading Library. Error if image < 300 pixels?

[eluser]Sinclair[/eluser]
Hi,

I'm trying to extend the Upload Library to pop up an Error when images have less than X pixels.

Code:

<?PHP

class MY_Upload extends CI_Upload {
    
    var $min_width        = 0;
    var $min_height        = 0;
    
    /**
     * Set Minimum Image Height
     *
     * @access    public
     * @param    integer
     * @return    void
     */    
    function set_min_height($n)
    {
        $this->min_height = ((int) $n < 0) ? 0: (int) $n;
    }
    
    /**
     * Set Minimum Image Width
     *
     * @access    public
     * @param    integer
     * @return    void
     */    
    function set_min_width($n)
    {
        $this->min_width = ((int) $n < 0) ? 0: (int) $n;
    }
    
    /**
     * Verify that the image is within the allowed minimum width/height
     *
     * @access    public
     * @return    bool
     */    
    function is_allowed_min_dimensions()
    {
        if ( ! $this->is_image())
        {
            return TRUE;
        }

        if (function_exists('getimagesize'))
        {
            $D = @getimagesize($this->file_temp);

            if ($this->min_width > 0 AND $D['0'] > $this->min_width)
            {
                return FALSE;
            }

            if ($this->min_height > 0 AND $D['1'] > $this->min_height)
            {
                return FALSE;
            }

            return TRUE;
        }

        return TRUE;
    }
    
    
}

I have this until now. What I need to do more to get this extend working. And wich is the best way of doing this extend without broke the CI compatibility?

Best Regards,