<?php



   /* ---------------------------------------------------------------------- *

	*  Created                                                               *

	*  by nick-on © Copyright 2009. All Rights Reserved!					 *

	* ---------------------------------------------------------------------- *

	*  This file may no be redistributed in whole or significant part.	 	 *

	* ---------------------------------------------------------------------- */



	class class_image

  	{
		  	var $image				=	false;



   	 		var $allow_watermark	=	false;



     		var $error				=	false;



     		var $types				=	array ( '1' => 'GIF', '2' => 'JPG', '3' => 'PNG' );



   	 		var $data				=	array ();



   	 		var $gd_version			=	2;



   	 		var $watermark_light	=	'';



   	 		var $watermark_dark		=	'';



   	 		var $quality			=	100;



   	 		public function __construct ( $file_name = "" )

   	 		{

	    	      $gd_functions = array

    	    	  (

	    	      		'imagecreate',

		    	      	'imagecreatefromgif',

	    	    	  	'imagecreatefromjpeg',

        	  			'imagecreatefrompng',

	        		  	'imagegif',

	    		      	'imagejpeg',

        		    	'imagepng',

    		      );



		          foreach ( $gd_functions as $function_name )

		          {

        			  	 if ( !function_exists ( $function_name ))

        			  	 {

				               $this->error = GD_ERROR;

          	 				   break;

          	 			}

		          }



        		  if ( $this->error )

		          {

        			   return false;

          		  }



          		  if ( $file_name != '' )

          		  {
           	   		   $this->open_image ( $file_name );

          		  }

   	 		}



		  /* ---------------------------------------------------------------- *

		   *    Init image params

		   * ---------------------------------------------------------------- */


 	 	   function open_image ( $file_name )

 	 	   {

 	 	  		  if ( $this->error == GD_ERROR )

 	 	  		  {
 	 	      		   return false;

 	 	  		  }



 	 	  		  $this->image 		  = false;



 	 	  		  $this->error 		  = false;



 	 	  		  $this->data  		  = array ();



 	 	  		  $this->data['file'] = $file_name;



		          if ( !file_exists ( $this->data['file'] ))

        		  {
          				$this->error = NO_IMG_FILE;

          		 		return false;

          		  }



	        	 /* --------------------------------------------------------- *

    		      *    Get file type & size

		          * --------------------------------------------------------- */



		          if ( !$image_info = getimagesize ( $this->data['file'] ) )

        		  {
            			$this->error = NO_IMAGE;

						return false;

		          }



		          if ( trim ( $this->data['type'] = $this->types [ $image_info[2] ] ) == '' )

        		  {
                	    $this->error = UNKNOWN_TYPE;

                 		return false;

          		  }



		          switch ( $this->data['type'] )

        		  {
           				case 'GIF' :

		           			$this->image = @imagecreatefromgif ( $this->data['file'] );

        		   			break;



           				case 'PNG' :

		           			$this->image = @imagecreatefrompng ( $this->data['file'] );

        		   			break;



           	   			case 'JPG' :

           	   				$this->image = @imagecreatefromjpeg ( $this->data['file'] );

		           	   		break;

        		  }



		          $this->data['width']  = imagesx ( $this->image );

        		  $this->data['height'] = imagesy ( $this->image );



		          if ( $this->data['width'] == 0 OR $this->data['height'] == 0 )

        		  {
		          	   $this->error = SIZE_ERROR;

        		  	   return false;

		          }

		   }



		  /* --------------------------------------------------------------- *

		   *    Generate thumbnail

	       * --------------------------------------------------------------- */



     	   function thumbnail ( $size, $crop_image = false )

     	   {

		         if ( $this->error )

        		 {
		         	  return false;

        		 }



         		 if ( is_numeric ( $size ) AND intval ( $size ) != 0 )

         		 {

		             $size_num = intval ( $size );

        		     $size	   = array ();



		             if ( $this->data['width'] >= $this->data['height'] )

        		     {
                		  $size['width']  = $size_num;

			              $size['height'] = ceil ( ( $size['width'] / $this->data['width'] ) * $this->data['height'] );

		             }

        		     else

		             {

        		     	  $size['height'] = $size_num;

              	 		  $size['width']  = ceil ( ( $size['height'] / $this->data['height'] ) * $this->data['width'] );

             		 }

		         }

        		 elseif ( !is_array ( $size ) OR intval ( $size['width'] ) == 0 OR intval ( $size['height'] ) == 0 )

		         {

			       	 $this->error = NO_THUMB_SIZE;

         			 return false;

		         }



        		 if ( $this->image )

		         {

        		     /* ----------------------------------------------------- *

		              *   Need to scale image ?

        		      * ----------------------------------------------------- */



		             if ( $this->data['width'] > $size['width'] OR $this->data['height'] > $size['height'] )

        		     {



                	  /* ---------------------------------------------------- *

	                   *   It's imposible to scale animated images

    	               * ---------------------------------------------------- */



                  		if ( $this->data['type'] == 'GIF' and $this->gif_animated () )

		                {

        					 $this->error = ANIMATED_GIF;
                       		 return false;

                  		}

		               	else

        		        {

		                       if ( $this->gd_version == 1 )

        		               {
                		       		$_thumb = imagecreate ( $size['width'], $size['height'] );

                       		   }

                       		   else

                       		   {
                       				$_thumb = imagecreatetruecolor ( $size['width'], $size['height'] );

                       		   }



                       		   if ( $size['width'] == $size['height'] OR $crop_image )

                       		   {

                            		if ( $this->data['width'] > $this->data['height'] )

                            		{

                               	 		 $this->scale_image ( $_thumb, $this->image, 0, 0, round((max($this->data['width'], $this->data['height']) - min($this->data['width'], $this->data['height']))/2), 0, $size['width'], $size['width'], min($this->data['width'], $this->data['height']), min($this->data['width'], $this->data['height']));

	                        		}



                            		if ( $this->data['width'] < $this->data['height'] )

                            		{
                                 		 $this->scale_image ( $_thumb, $this->image, 0, 0, 0, 0, $size['width'], $size['width'], min ( $this->data['width'], $this->data['height'] ), min ( $this->data['width'], $this->data['height'] ));

                            		}



                            		if ( $this->data['width'] == $this->data['height'] )

                            		{
                                 		 $this->scale_image ( $_thumb, $this->image, 0, 0, 0, 0, $size['width'], $size['width'], $this->data['width'], $this->data['height'] );

                            		}

		                       }

        			           else

                     		   {

                            		$this->scale_image ( $_thumb, $this->image, 0, 0, 0, 0, $size['width'], $size['height'], $this->data['width'], $this->data['height'] );

                       		   }



                       		   $this->image = $_thumb;

                  		}

             		 }

         		 }

         		 else

         		 {
         	 			$this->error = IMG_CREATE_ERROR;

         	 			return $this->error;

         		 }

     	   }



	      /* --------------------------------------------------------------- *

    	   *   Resize image

		   * --------------------------------------------------------------- */



		   function scale_image ( $dist, $source, $x1, $y1, $x2, $y2, $width_1, $height_1, $width_2, $height_2 )

     	   {

     	 		if ( $this->gd_version == 1 )

     	 		{
    		  		imagecopyresized   ( $dist, $source, $x1, $y1, $x2, $y2, $width_1, $height_1, $width_2, $height_2 );

		    	}

     	 		else

     	 		{
	          		imagecopyresampled ( $dist, $source, $x1, $y1, $x2, $y2, $width_1, $height_1, $width_2, $height_2 );

		     	}

     	   }



		  /* --------------------------------------------------------------- *

		   *    Maybe it's gif animated image ?

		   * --------------------------------------------------------------- */



		   function gif_animated ()

		   {
         		$content = @file_get_contents ( $this->data['file'] );



		        if ( trim ( $content ) == '' )

        		{
         	  		 $this->error = READ_FILE_ERROR;

         	  		 return false;

         		}



         		$count = 0;

         		$pos	= 0;



         		while ( $count < 2 )

         		{
              		$frame_one = strpos ( $content, "\x00\x21\xF9\x04", $pos );



              		if ( $frame_one === false )

              		{

               	   		break;

              		}

              		else

              		{
                   		$pos		  = $frame_one + 1;

                   		$frame_two = strpos ( $content, "\x00\x2C", $pos );



                   		if ( $frame_two === false )

                   		{
                   			break;

                   		}

                   		else

                   		{
                    		if ( $frame_one + 8 == $frame_two )

                    		{
                         		 $count++;

                    		}



                    		$pos = $frame_two + 1;

                   		}

              		}

         		}



         		return $count > 1;

     	   }



   		  /* --------------------------------------------------------------- *

		   * 	Saving ?

		   * --------------------------------------------------------------- */



		   function save ( $file_name = '', $source = false )

     	   {

	     		if ( $this->error )

         		{

         	  		 return false;

         		}



         		if ( trim ( $file_name ) == '' )

         		{
         	  		 $file_name = $this->data['file'];

         		}



		        if ( !$source )

        		{
         	   		  $source = $this->image;

         		}



         		$file_name = preg_replace( "/^(.*)\..+?$/", "\\1", $file_name ) . "." . strtolower ( $this->data['type'] );



		 		switch ( $this->data['type'] )

		 		{
	 				case 'GIF' :

	 					@imagegif  ( $source, $file_name );

	 					break;



			 		case 'PNG' :

	 					@imagepng  ( $source, $file_name );

	 					break;



			 		case 'JPG' :

	 					@imagejpeg ( $source, $file_name, $this->quality );

	 					break;

		 		}



         		if ( !file_exists ( $file_name ))

         		{

         	   		  $this->error = SAVE_ERROR;
         	   		  return false;

         		}



         		@imagedestroy ( $source );

         		@chmod 	   ( $file_name, 0666 );



         		return $file_name;

     	   }



    	  /* ---------------------------------------------------------------- *

		   *	  Insert watermark!

		   * ---------------------------------------------------------------- */



		   function watermark ( $position = BOTTOM_RIGHT, $source = false, $margin = 7 )

     	   {

			    if ( $this->error )

        		{

		         	  return false;

        		}



		     	if ( !$this->allow_watermark )

     			{
        		 	  $this->error = NOT_ALLOWED;

		     		  return false;

		     	}



     			if ( $this->data['type'] == 'GIF' AND $this->gif_animated() )

		     	{
     				 $this->error = ANIMATED_GIF;

		     		 return false;

     			}



		     	if ( !$source )

     			{

		     		  $source = $this->image;

     			}



		     	if ( !file_exists ( $this->watermark_light ) OR !file_exists ( $this->watermark_dark )){

		         	$this->error = NO_WATERMARK_FILE;

        		 	return false;

		     	}



        		$image_width  	= imagesx ( $this->image );

		        $image_height 	= imagesy ( $this->image );



        		$watermark_size = getimagesize ( $this->watermark_light );



		     	switch ( $position )

     			{

		     		case TOP_RIGHT :

        		  		$pos_x = $image_width - $margin - $watermark_size[0];

          				$pos_y = $margin;

		    			break;



     				case TOP_LEFT :

     					$pos_x = $margin;

		     			$pos_y = $margin;

     					break;



		     		case BOTTOM_RIGHT :

     				    $pos_x = $image_width  - $margin - $watermark_size[0];

     		    		$pos_y = $image_height - $margin - $watermark_size[1];

		     			break;



     				case BOTTOM_LEFT :

        				$pos_x = $margin;

		          		$pos_y = $image_height - $margin - $watermark_size[1];

     					break;



		     		case CENTER:

     				    $pos_x = ceil ( $image_width  / 2 ) - ceil ( $watermark_size[0] / 2 );

     		    		$pos_y = ceil ( $image_height / 2 ) - ceil ( $watermark_size[1] / 2 );

		     			break;



     				case TOP :

						$pos_x = ceil ( $image_width  / 2 ) - ceil ( $watermark_size[0] / 2 );

		     			$pos_y = $margin;

     					break;



		       		case BOTTOM :

       					$pos_x = ceil ( $image_width  / 2 ) - ceil ( $watermark_size[0] / 2 );

       					$pos_y = $image_height - $margin;

		       			break;



        		 	case LEFT :

         	    		$pos_x = $margin;

		         	    $pos_y = ceil ( $image_height / 2 ) - ceil ( $watermark_size[1] / 2 );

        		 		break;



		         	case RIGHT :

        		 		$pos_x = $image_width - $margin - $watermark_size[0];

         	    		$pos_y = ceil ( $image_height / 2 ) - ceil ( $watermark_size[1] / 2 );

		         		break;



        		 	default :

           				$pos_x = $image_width  - $margin - $watermark_size[0];

		           		$pos_y = $image_height - $margin - $watermark_size[1];

        		 		break;

			   	}



		     	if ( $pos_x < 0 OR $pos_y < 0 OR $watermark_size[0] + $margin > $image_width OR $watermark_size[1] + $margin > $image_height )

     			{

		     		 return false;

     			}



		     	$pixel = imagecreatetruecolor ( 1, 1 );



      			imagecopyresampled ( $pixel, $source, 0, 0, $pos_x, $pos_y, 1, 1, $watermark_size[0], $watermark_size[1] );



		      	$RGB   = imagecolorat ( $pixel, 0, 0 );



      			$red 	= ( $RGB >> 16 ) & 0xFF;

		      	$green 	= ( $RGB >> 8  ) & 0xFF;

      			$blue	= $RGB & 0xFF;



		      	$min 	= min ( $red, $green, $blue );

      			$max 	= max ( $red, $green, $blue );



		      	$light 	= (double)(( $min + $max ) / 510.0 );



		      	@imagedestroy ( $pixel );



				$watermark_image = $light < 0.5 ? $this->watermark_light : $this->watermark_dark;



		        $watermark = @imagecreatefrompng ( $watermark_image );



        		imagealphablending ( $this->image, 	true );

		        imagealphablending ( $watermark, 	true );



		        imagecopy ( $this->image, $watermark, $pos_x, $pos_y, 0, 0, $watermark_size[0], $watermark_size[1] );



		        imagedestroy ( $watermark );

		   }





		 /* ---------------------------------------------------------------- *

    	  *	  Show GD image

	      * ---------------------------------------------------------------- */



	      function show ( $source = false )

	      {
		   	 	if ( !$source )

     		 	{
     	 		   	  $source = $this->image;

     	 	 	}



	   	 	 	flush();



     	 	 	switch ( $this->data['type'] )

     	 	 	{
     	 			case 'GIF' :

		     	 	    @header('Content-type: image/gif');

     			 		break;



		     	 	case 'PNG' :

     			 	    @header('Content-Type: image/png' );

     	 				break;



		     	 	case 'JPG' :

     			 	    @header('Content-Type: image/jpeg' );

     	 				break;

	     	 	}



    	 	 	print_r ( $this->image );

          		exit ();

	      }

  	}



?>