transform.php

完美的在线教育系统

            }
            $this->img_x = $data[0];
            $this->img_y = $data[1];
            $this->type = $type;

            return true;
        } else {
            echo("Cannot fetch image or images details.");
            return null;
        }
        /*
        $output = array(
                        'width' => $data[0],
                        'height' => $data[1],
                        'type' => $type
                        );
        return $output;
        */
    }


    /**
     * Parse input and convert
     * If either is 0 it will be scaled proportionally
     *
     * @access private
     *
     * @param mixed $new_size (0, number, percentage 10% or 0.1)
     * @param int $old_size
     *
     * @return mixed none or PEAR_error
     */
    function _parse_size($new_size, $old_size)
    {
        if ('%' == $new_size) {
            $new_size = str_replace('%','',$new_size);
            $new_size = $new_size / 100;
        }
        if ($new_size > 1) {
            return (int) $new_size;
        } elseif ($new_size == 0) {
            return (int) $old_size;
        } else {
            return (int) round($new_size * $old_size, 0);
        }
    }


    function uniqueStr()
    {
      return substr(md5(microtime()),0,6);
    }

    //delete old tmp files, and allow only 1 file per remote host.
    function cleanUp($id, $dir)
    {
        $d = dir($dir);
        $id_length = strlen($id);

        while (false !== ($entry = $d->read())) {
            if (is_file($dir.'/'.$entry) && substr($entry,0,1) == '.' && !ereg($entry, $this->image))
            {
                //echo filemtime($this->directory.'/'.$entry)."<br>"; 
                //echo time();

                if (filemtime($dir.'/'.$entry) + $this->lapse_time < time())
                    unlink($dir.'/'.$entry);

                if (substr($entry, 1, $id_length) == $id)
                {
                    if (is_file($dir.'/'.$entry))
                        unlink($dir.'/'.$entry);
                }
            }
        }
        $d->close();
    }


    function createUnique($dir)
    {
       $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type;
        
       //make sure the the unique temp file does not exists
        while (file_exists($dir.$unique_str))
        {
            $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type;
        }
        
      $this->cleanUp($this->uid, $dir);

       return $unique_str;
    }


    /**
     * Set the image width
     * @param int $size dimension to set
     * @since 29/05/02 13:36:31
     * @return
     */
    function _set_img_x($size)
    {
        $this->img_x = $size;
    }

    /**
     * Set the image height
     * @param int $size dimension to set
     * @since 29/05/02 13:36:31
     * @return
     */
    function _set_img_y($size)
    {
        $this->img_y = $size;
    }

    /**
     * Set the image width
     * @param int $size dimension to set
     * @since 29/05/02 13:36:31
     * @return
     */
    function _set_new_x($size)
    {
        $this->new_x = $size;
    }

    /**
     * Set the image height
     * @param int $size dimension to set
     * @since 29/05/02 13:36:31
     * @return
     */
    function _set_new_y($size)
    {
        $this->new_y = $size;
    }

    /**
     * Get the type of the image being manipulated
     *
     * @return string $this->type the image type
     */
    function getImageType()
    {
        return $this->type;
    }

    /**
     *
     * @access public
     * @return string web-safe image type
     */
    function getWebSafeFormat()
    {
        switch($this->type){
            case 'gif':
            case 'png':
                return 'png';
                break;
            default:
                return 'jpeg';
        } // switch
    }

    /**
     * Place holder for the real resize method
     * used by extended methods to do the resizing
     *
     * @access private
     * @return PEAR_error
     */
    function _resize() {
        return null; //PEAR::raiseError("No Resize method exists", true);
    }

    /**
     * Place holder for the real load method
     * used by extended methods to do the resizing
     *
     * @access public
     * @return PEAR_error
     */
    function load($filename) {
        return null; //PEAR::raiseError("No Load method exists", true);
    }

    /**
     * Place holder for the real display method
     * used by extended methods to do the resizing
     *
     * @access public
     * @param string filename
     * @return PEAR_error
     */
    function display($type, $quality) {
        return null; //PEAR::raiseError("No Display method exists", true);
    }

    /**
     * Place holder for the real save method
     * used by extended methods to do the resizing
     *
     * @access public
     * @param string filename
     * @return PEAR_error
     */
    function save($filename, $type, $quality) {
        return null; //PEAR::raiseError("No Save method exists", true);
    }

    /**
     * Place holder for the real free method
     * used by extended methods to do the resizing
     *
     * @access public
     * @return PEAR_error
     */
    function free() {
        return null; //PEAR::raiseError("No Free method exists", true);
    }

    /**
     * Reverse of rgb2colorname.
     *
     * @access public
     * @return PEAR_error
     *
     * @see rgb2colorname
     */
    function colorhex2colorarray($colorhex) {
        $r = hexdec(substr($colorhex, 1, 2));
        $g = hexdec(substr($colorhex, 3, 2));
        $b = hexdec(substr($colorhex, 4, 2));
        return array($r,$g,$b);
    }

    /**
     * Reverse of rgb2colorname.
     *
     * @access public
     * @return PEAR_error
     *
     * @see rgb2colorname
     */
    function colorarray2colorhex($color) {
        $color = '#'.dechex($color[0]).dechex($color[1]).dechex($color[2]);
        return strlen($color)>6?false:$color;
    }


    /* Methods to add to the driver classes in the future */
    function addText()
    {
        return null; //PEAR::raiseError("No addText method exists", true);
    }

    function addDropShadow()
    {
        return null; //PEAR::raiseError("No AddDropShadow method exists", true);
    }

    function addBorder()
    {
        return null; //PEAR::raiseError("No addBorder method exists", true);
    }

    function crop()
    {
        return null; //PEAR::raiseError("No crop method exists", true);
    }

    function flip() 
    {
        return null;
    }

    function gamma()
    {
        return null; //PEAR::raiseError("No gamma method exists", true);
    }
}
?>