<?php

    
    
    /**
     * Image Resizer.
     * @author : Harish Chauhan
     * @copyright : Freeware
     * About :This PHP script will resize the given image and can show on the fly or save as image file.
     *
     */
    


    define("HAR_AUTO_NAME",1);    
    Class RESIZEIMAGE
    {
        var $imgFile="";
        var $imgWidth=0;
        var $imgHeight=0;
        var $imgType="";
        var $imgAttr="";
        var $type=NULL;
        var $_img=NULL;
        var $_error="";
        
        /**
         * Constructor
         *
         * @param [String $imgFile] Image File Name
         * @return RESIZEIMAGE (Class Object)
         */
        
        function RESIZEIMAGE($imgFile="")
        {
            if (!function_exists("imagecreate"))
            {
                $this->_error="Error: GD Library is not available.";
                return false;
            }

            $this->type=Array(1 => 'GIF', 2 => 'JPG', 3 => 'PNG', 4 => 'SWF', 5 => 'PSD', 6 => 'BMP', 7 => 'TIFF', 8 => 'TIFF', 9 => 'JPC', 10 => 'JP2', 11 => 'JPX', 12 => 'JB2', 13 => 'SWC', 14 => 'IFF', 15 => 'WBMP', 16 => 'XBM');
            if(!empty($imgFile))
                $this->setImage($imgFile);
        }
        /**
         * Error occured while resizing the image.
         *
         * @return String
         */
        function error()
        {
            return $this->_error;
        }
        
        /**
         * Set image file name
         *
         * @param String $imgFile
         * @return void
         */
        function setImage($imgFile)
        {
            $this->imgFile=$imgFile;
            return $this->_createImage();
        }
        /**
         *
         * @return void
         */
        function close()
        {
            return @imagedestroy($this->_img);
        }
        /**
         * Resize a image to given width and height and keep it's current width and height ratio
         *
         * @param Number $imgwidth
         * @param Numnber $imgheight
         * @param String $newfile
         */
        function resize_limitwh($imgwidth,$imgheight,$newfile=NULL)
        {
            list($width, $height, $type, $attr) = @getimagesize($this->imgFile);
            if($width > $imgwidth)
                $image_per = floor(($imgwidth * 100) / $width);

            if(floor(($height * $image_per)/100)>$imgheight)
                $image_per = floor(($imgheight * 100) / $height);

            $this->resize_percentage($image_per,$newfile);

        }
        /**
         * Resize an image to given percentage.
         *
         * @param Number $percent
         * @param String $newfile
         * @return Boolean
         */
        function resize_percentage($percent=100,$newfile=NULL)
        {
            $newWidth=($this->imgWidth*$percent)/100;
            $newHeight=($this->imgHeight*$percent)/100;
            return $this->resize($newWidth,$newHeight,$newfile);
        }
        /**
         * Resize an image to given X and Y percentage.
         *
         * @param Number $xpercent
         * @param Number $ypercent
         * @param String $newfile
         * @return Boolean
         */
        function resize_xypercentage($xpercent=100,$ypercent=100,$newfile=NULL)
        {
            $newWidth=($this->imgWidth*$xpercent)/100;
            $newHeight=($this->imgHeight*$ypercent)/100;
            return $this->resize($newWidth,$newHeight,$newfile);
        }
        
        /**
         * Resize an image to given width and height
         *
         * @param Number $width
         * @param Number $height
         * @param String $newfile
         * @return Boolean
         */
        function resize($width,$height,$newfile=NULL)
        {
            if(empty($this->imgFile))
            {
                $this->_error="File name is not initialised.";
                return false;
            }
            if($this->imgWidth<=0 || $this->imgHeight<=0)
            {
                $this->_error="Could not resize given image";
                return false;
            }
            if($width<=0)
                $width=$this->imgWidth;
            if($height<=0)
                $height=$this->imgHeight;
                
            return $this->_resize($width,$height,$newfile);
        }
        
        /**
         * Get the image attributes
         * @access Private
         *         
         */
        function _getImageInfo()
        {
            @list($this->imgWidth,$this->imgHeight,$type,$this->imgAttr)=@getimagesize($this->imgFile);
            $this->imgType=$this->type[$type];
        }
        
        /**
         * Create the image resource
         * @access Private
         * @return Boolean
         */
        function _createImage()
        {
            $this->_getImageInfo($imgFile);
            if($this->imgType=='GIF')
            {
                $this->_img=@imagecreatefromgif($this->imgFile);
            }
            elseif($this->imgType=='JPG')
            {
                $this->_img=@imagecreatefromjpeg($this->imgFile);
            }
            elseif($this->imgType=='PNG')
            {
                $this->_img=@imagecreatefrompng($this->imgFile);
            }            
            if(!$this->_img || !@is_resource($this->_img))
            {
                $this->_error="Error loading ".$this->imgFile;
                return false;
            }
            return true;
        }
        
        /**
         * Function is used to resize the image
         *
         * @access Private
         * @param Number $width
         * @param Number $height
         * @param String $newfile
         * @return Boolean
         */
        function _resize($width,$height,$newfile=NULL)
        {
            if (!function_exists("imagecreate"))
            {
                $this->_error="Error: GD Library is not available.";
                return false;
            }

            $newimg=@imagecreatetruecolor($width,$height);
            @imagecopyresampled ( $newimg, $this->_img, 0,0,0,0, $width, $height, $this->imgWidth,$this->imgHeight);
            if($newfile===HAR_AUTO_NAME)
            {
                if(@preg_match("/\..*+$/",@basename($this->imgFile),$matches))
                       $newfile=@substr_replace($this->imgFile,"_har",-@strlen($matches[0]),0);            
            }
            elseif(!empty($newfile))
            {
                if(!@preg_match("/\..*+$/",@basename($newfile)))
                {
                    if(@preg_match("/\..*+$/",@basename($this->imgFile),$matches))
                       $newfile=$newfile.$matches[0];
                }
            }

            if($this->imgType=='GIF')
            {
                if(!empty($newfile))
                    @imagegif($newimg,$newfile);
                else
                {
                    @header("Content-type: image/gif");
                    @imagegif($newimg);
                }
            }
            elseif($this->imgType=='JPG')
            {
                if(!empty($newfile))
                    @imagejpeg($newimg,$newfile);
                else
                {
                    @header("Content-type: image/jpeg");
                    @imagejpeg($newimg);
                }
            }
            elseif($this->imgType=='PNG')
            {
                if(!empty($newfile))
                    @imagepng($newimg,$newfile);
                else
                {
                    @header("Content-type: image/png");
                    @imagepng($newimg);
                }
            }
            @imagedestroy($newimg);
        }
    }
?>