image.class.php

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<?php
class image {
 
        private $_image;

        private $_type;
 
        public function load($filepath) {
        
                $image_info = getimagesize($filepath);
                $this->_type = $image_info[2];
           
                if($this->_type == IMAGETYPE_JPEG)
                        $this->_image = imagecreatefromjpeg($filepath);
                elseif($this->_type == IMAGETYPE_GIF)
                        $this->_image = imagecreatefromgif($filepath);
                elseif($this->_type == IMAGETYPE_PNG)
                        $this->_image = imagecreatefrompng($filepath);
        }

        public function type() {
                return $this->_type;
        }

        public function save($filepath, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
 
                if($image_type == IMAGETYPE_JPEG)
                        imagejpeg($this->_image, $filepath, $compression);
                elseif($image_type == IMAGETYPE_GIF)
                        imagegif($this->_image, $filepath);
                elseif($image_type == IMAGETYPE_PNG)
                        imagepng($this->_image, $filepath);
                if($permissions != null)
                        chmod($filepath, $permissions);

        }

        public function output($image_type=IMAGETYPE_JPEG) {
 
                if($image_type == IMAGETYPE_JPEG )
                        imagejpeg($this->_image);
                elseif($image_type == IMAGETYPE_GIF)
                        imagegif($this->_image);
                elseif($image_type == IMAGETYPE_PNG)
                        imagepng($this->_image);

        }

        public function getWidth() {
 
                return imagesx($this->_image);

        }
        
        public function getHeight() {
 
                return imagesy($this->_image);

        }

        public function resizeToHeight($height, $opts=null) {
 
                $enlarge = gOpt($opts, "enlarge", false);

                if($enlarge || $height<$this->getHeight()) {
                        $ratio = $height / $this->getHeight();
                        $width = $this->getWidth() * $ratio;
                }
                else {
                        $height = $this->getHeight();
                        $width = $this->getWidth();
                }

                $this->resize($width,$height);

        }
 
        public function resizeToWidth($width, $opts=null) {
        
                $enlarge = gOpt($opts, "enlarge", false);

                if($enlarge || $width<$this->getWidth()) {
                        $ratio = $width / $this->getWidth();
                        $height = $this->getheight() * $ratio;
                }
                else {
                        $height = $this->getHeight();
                        $width = $this->getWidth();
                }

                $this->resize($width,$height);

        }

        public function scale($scale) {
      
                $width = $this->getWidth() * $scale/100;
                $height = $this->getheight() * $scale/100;
                $this->resize($width,$height);

        }
 

        public function resize($width, $height) {
        
                $new_image = imagecreatetruecolor($width, $height);
                imagecopyresampled($new_image, $this->_image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
                $this->_image = $new_image;

        }      
 
}

?>