Small modification of the Flexinode image field to resize images on the fly

Thank you both for working on this functionality. I was the originator of that other thread... looking for a solution. I am so happy to find that you have been trying here!

I implemented the GD code posted by the_undefined into my site and here is the problem:

• the size of the originally uploaded picture is 2048x1536 @ 1MB
• the size of the resized picture (located in the files directory) is 2048x1536 @ 474kb

Looks to me like the image was downsized in terms of file size/quality, but not resolution. Just so you know, my flexinode field max sizes are set to 400x400 @ 1.5MB.

The GD code linked to above (what I am using) is posted below, just in case that link is not available in the future.

Please modify the code to resize properly or let me know if I am doing something wrong. Thanks for the help!

/*
I've written the code for the image class 2 1/2 years ago, I know it's not that nice to look at today ; ).

This code should be used instead of the one verot posted in order to avoid using exec():
*/
 
<?php
            $image = &new class_image($file->filepath);
            $image->fit_in_box($size[0], $size[1]);
            $image->save_jpg($file->filepath, 90);
            $file->filesize = @filesize($file->filepath);
?>
 
 
/*
Here is the class that you have to include or copy into the PHP file in order to make things work.
*/
<?php
    class class_image
    {      
        var $image;                         # Das Bild der Klasse
        var $height;
        var $width;
    
        function class_image($picture = NULL)
        {      
            if ($picture) 
            {
                $this->image = $this->load_image($picture);
                $this->set_infos($picture);
            }
        }
        
        function save_jpg($file, $quality = 90)
        {
            imagejpeg($this->image, $file, $quality);      
        }
        
        function fit_in_box($width, $height)
        {      
            $old_factor = $this->width / $this->height;
            $new_factor = $width / $height;
            
            if ($old_factor<$new_factor)
            {
                $new_height = $height;
                $new_width = $new_height * $old_factor;
            }
            if ($old_factor>$new_factor)
            {
                $new_width = $width;
                $new_height = $new_width / $old_factor;    
            }         
            if ($old_factor==$new_factor)
            {
                $new_height = $height;
                $new_width = $width;
            }                  
 
            $this->resize_image($new_width, $new_height);
        }
        
        function resize_image($new_width, $new_height)
        {
            $new_image = imagecreatetruecolor($new_width, $new_height);   
            imagecopyresized($new_image, $this->image, 0, 0, 0, 0,
                              $new_width, $new_height, $this->width, $this->height);            
            $this->image = $new_image;          
            $this->width = $new_width;
            $this->height = $new_height;
        }
        
        function set_infos($file)
        {
            $size = getimagesize($file);
            $this->width = $size[0];
            $this->height = $size[1];                  
        }
        
        function load_image($picture)
        {
            $extension = $this->get_extension($picture);
            
            switch ($extension)
            {
                case "jpg";
                    $image = imagecreatefromjpeg($picture);
                    break;
                case "gif";
                    $image = imagecreatefromgif($picture);
                    break;
                case "png";
                    $image = imagecreatefrompng($picture);
                    break;
            }
                                    
            return $image;
        }
        
        function get_extension ($name)
        {
            $tmp_arr = explode (".", $name);
            $str_output = $tmp_arr[count($tmp_arr)-1];
            $str_output = strtolower ($str_output);
            if ($str_output == "jpeg") $str_output = "jpg";
            return $str_output;
        }   
    }
?>

Man, this is exatctly what I have been looking for, an easy way to resize images as the come up. I applied it and got it to work but I ran into a problem. It seems to strip the IPTC and EXIF information from the JPEGs. I store my caption information in there and need to keep it. This is a pretty specialized question, but searching around the web hasn't given me any clues, how do I resize without stripping away the IPTC and EXIF?

Thanks,

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