/system/modules/Control/Img2Thumb.php

<?php

// Important: Must be includeable from outside the Mambo Framework!

// defined( '_VALID_MOS' ) or die( 'Direct Access to this location is not allowed.' );

/**

*

* @version $Id: class.img2thumb.php 617 2007-01-04 19:43:08Z soeren_nb $

* @package VirtueMart

* @subpackage classes

* @copyright Copyright (C) 2004-2005 Soeren Eberhardt. All rights reserved.

* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php

* VirtueMart is free software. This version may have been modified pursuant

* to the GNU General Public License, and as distributed it includes or

* is derivative of works licensed under the GNU General Public License or

* other free or open source software licenses.

* See /administrator/components/com_virtuemart/COPYRIGHT.php for copyright notices and details.

*

* http://virtuemart.net

*/



/**

* class Image2Thumbnail

* Thumbnail creation with PHP4 and GDLib (recommended, but not mandatory: 2.0.1 !)

*

*

* @author     Andreas Martens <heyn@plautdietsch.de>

* @author     Patrick Teague <webdude@veslach.com>

* @author     Soeren Eberhardt <soeren@virtuemart.net>

*@version	1.0b

*@date       modified 11/22/2004

*@modifications 

*   - added support for GDLib < 2.0.1

*	- added support for reading gif images 

*	- makes jpg thumbnails

*	- changed several groups of 'if' statements to single 'switch' statements

*   - commented out original code so modification could be identified.

*/



namespace Control;



class Img2Thumb	{

// New modification

/**

*	private variables - do not use

*	

*	@var int $bg_red				0-255 - red color variable for background filler

*	@var int $bg_green				0-255 - green color variable for background filler

*	@var int $bg_blue				0-255 - blue color variable for background filler

*	@var int $maxSize				0-1 - true/false - should thumbnail be filled to max pixels

*/

	var $bg_red;

	var $bg_green;

	var $bg_blue;

	var $maxSize;

	/**

	 * @var string Filename for the thumbnail

	 */

	var $fileout;



/**

*   Constructor - requires following vars:

*	

*	@param string $filename			image path

*	

*	These are additional vars:

*	

*	@param int $newxsize			new maximum image width

*	@param int $newysize			new maximum image height

*	@param string $fileout			output image path

*	@param int $thumbMaxSize		whether thumbnail should have background fill to make it exactly $newxsize x $newysize

*	@param int $bgred				0-255 - red color variable for background filler

*	@param int $bggreen				0-255 - green color variable for background filler

*	@param int $bgblue				0-255 - blue color variable for background filler

*	

*/

	function Img2Thumb($filename, $newxsize=60, $newysize=60, $fileout='',

		$thumbMaxSize=0, $bgred=0, $bggreen=0, $bgblue=0)

	{		

		

		//	New modification - checks color int to be sure within range

		if($thumbMaxSize)

		{

			$this->maxSize = true;

		}

		else

		{

			$this->maxSize = false;

		}

		if($bgred>=0 || $bgred<=255)

		{

			$this->bg_red = $bgred;

		}

		else

		{

			$this->bg_red = 0;

		}

		if($bggreen>=0 || $bggreen<=255)

		{

			$this->bg_green = $bggreen;

		}

		else

		{

			$this->bg_green = 0;

		}

		if($bgblue>=0 || $bgblue<=255)

		{

			$this->bg_blue = $bgblue;

		}

		else

		{

			$this->bg_blue = 0;

		}

		

		$this->NewImgCreate($filename,$newxsize,$newysize,$fileout);

	}

	

/**

*  

*	private function - do not call

*

*/

	function NewImgCreate($filename,$newxsize,$newysize,$fileout)

	{



		$type = $this->GetImgType($filename);

		

		$pathinfo = pathinfo( $fileout );

		if( empty( $pathinfo['extension'])) {

			$fileout .= '.'.$type;

		}

		$this->fileout = $fileout;

		

		// free some memory

		clearstatcache();

		

		switch(strtolower($type))

		{

			case "gif":

				// unfortunately this function does not work on windows

				// via the precompiled php installation :(

				// it should work on all other systems however.

				if( function_exists("imagecreatefromgif") )

				{

					$orig_img = imagecreatefromgif($filename);

					break;

				}

				else

				{

					echo 'Sorry, this server doesn\'t support <b>imagecreatefromgif()</b>';

					exit;

					break;

				}

			case "jpg":

			case "jpeg":

				$orig_img = imagecreatefromjpeg($filename);

				break;

			case "png":

				$orig_img = imagecreatefrompng($filename);

				break;

		}

		

		$new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);



		if (!empty($fileout))

		{

			 $this-> NewImgSave($new_img,$fileout,$type);

		}

		else

		{

			 $this->NewImgShow($new_img,$type);

		}

		

		ImageDestroy($new_img);

		ImageDestroy($orig_img);

	}

	

	/**

*  

*	private function - do not call

*	includes function ImageCreateTrueColor and ImageCopyResampled which are available only under GD 2.0.1 or higher !

*/

	function NewImgResize($orig_img,$newxsize,$newysize,$filename)

	{

		//getimagesize returns array

		// [0] = width in pixels

		// [1] = height in pixels

		// [2] = type

		// [3] = img tag "width=xx height=xx" values

		

        $orig_size = getimagesize($filename);



        $maxX = $newxsize;

        $maxY = $newysize;



        if (($orig_size[0]/$orig_size[1])<($maxX/$maxY))

        {

                $newxsize = $newysize * ($orig_size[0]/$orig_size[1]);

                $adjustX = ($maxX - $newxsize)/2;

                $adjustY = 0;

        }

        else

        {

                $newysize = $newxsize / ($orig_size[0]/$orig_size[1]);

                $adjustX = 0;

                $adjustY = ($maxY - $newysize)/2;

        }

		

		/* Original code removed to allow for maxSize thumbnails

		$im_out = ImageCreateTrueColor($newxsize,$newysize);

		ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0,

			$newxsize, $newysize,$orig_size[0], $orig_size[1]);

		*/



		//	New modification - creates new image at maxSize

		if( $this->maxSize )

		{

			if( function_exists("imagecreatetruecolor") )

			  $im_out = imagecreatetruecolor($maxX,$maxY);

			else

			  $im_out = imagecreate($maxX,$maxY);

			  

                        // Need to image fill just in case image is transparent, don't always want black background

                        $bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );

                    

                        if( function_exists( "imageAntiAlias" )) {

                                imageAntiAlias($im_out,true);

                        }

                    imagealphablending($im_out, false);

                    if( function_exists( "imagesavealpha")) {

                        imagesavealpha($im_out,true);

                    }

                    if( function_exists( "imagecolorallocatealpha")) {

                        $transparent = imagecolorallocatealpha($im_out, 255, 255, 255, 127);

                    }

                        

                        //imagefill( $im_out, 0,0, $bgfill );

                        if( function_exists("imagecopyresampled") ){

                                ImageCopyResampled($im_out, $orig_img, $adjustX, $adjustY, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);

                        }

                        else {

                                ImageCopyResized($im_out, $orig_img, $adjustX, $adjustY, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);

                        }

                        

                }

                else

                {

                

			if( function_exists("imagecreatetruecolor") )

			  $im_out = ImageCreateTrueColor($newxsize,$newysize);

			else

			  $im_out = imagecreate($newxsize,$newysize);

			  

			if( function_exists( "imageAntiAlias" ))

			  imageAntiAlias($im_out,true);

 		    imagealphablending($im_out, false);

		    if( function_exists( "imagesavealpha"))

			  imagesavealpha($im_out,true);

		    if( function_exists( "imagecolorallocatealpha"))

			  $transparent = imagecolorallocatealpha($im_out, 255, 255, 255, 127);

			  

			if( function_exists("imagecopyresampled") )

			  ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);

			else

			  ImageCopyResized($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);

		}

		



		return $im_out;

	}

	

	/**

*  

*	private function - do not call

*

*/

	function NewImgSave($new_img,$fileout,$type)

	{



                switch($type)

                {

                        case "gif":

                                if( !function_exists("imagegif") )

                                {

                                        //if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".gif") $fileout .= ".png";

                                        return imagepng($new_img,$fileout);

                                        

                                }

                                else {

                                        //if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".gif")  $fileout .= '.gif';

                                        return imagegif( $new_img, $fileout );

                                        

                                }

                                break;

                        case "jpg":

				//if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".jpg") $fileout .= ".jpg";

                                return imagejpeg($new_img, $fileout, 100);

                                break;

			case "jpeg":

                                // if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".jpeg") $fileout .= ".jpeg";

                                return imagejpeg($new_img, $fileout, 100);

                                break;

                        case "png":

                                if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".png")

					$fileout .= ".png";

				return imagepng($new_img,$fileout);

				break;

		}

	}

	

	/**

*  

*	private function - do not call

*

*/

	function NewImgShow($new_img,$type)

	{

		/* Original code removed in favor of 'switch' statement

		if ($type=="png")

		{

			header ("Content-type: image/png");

			 return imagepng($new_img);

		}

		if ($type=="jpg")

		{

			header ("Content-type: image/jpeg");

			 return imagejpeg($new_img);

		}

		*/

		switch($type)

		{

			case "gif":

				if( function_exists("imagegif") )

				{

					header ("Content-type: image/gif");

					return imagegif($new_img);

					break;

				}

				else

					$this->NewImgShow( $new_img, "jpg" );

			case "jpg":

				header ("Content-type: image/jpeg");

				return imagejpeg($new_img);

				break;

			case "png":

				header ("Content-type: image/png");

				return imagepng($new_img);

				break;

		}

	}

	

	/**

*  

*	private function - do not call

*

*   1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF,

*   5 = PSD, 6 = BMP,

*   7 = TIFF(intel byte order),

*   8 = TIFF(motorola byte order),

*   9 = JPC, 10 = JP2, 11 = JPX,

*   12 = JB2, 13 = SWC, 14 = IFF

*/

	function GetImgType($filename)

	{

		$info = getimagesize($filename);

		/* Original code removed in favor of 'switch' statement

		if($size[2]==2)

			return "jpg";

		elseif($size[2]==3)

			return "png";

		*/

		switch($info[2]) {

			case 1:

				return "gif";

				break;

			case 2:

				return "jpg";

				break;

			case 3:

				return "png";

				break;

			default:

				return false;

		}

	}

	

}



?>