jpegtranLib

This is a little CodeIgniter library for using jpegtran on Unix-like systems to make JPEG lossless transformations.

To learn about jpegtran, please read man pages on your system.

Usage

$this->load->library('jpegtranlib');

$options = array (
        'optimize'    => TRUE,
        'progressive' => TRUE,
        'rotate'      => '90',
        'copy'        => 'comments'
    );

$this->jpegtranlib->modify('orig.jpg', $options);           // To modify the file itself.
$this->jpegtranlib->copy('orig.jpg', 'dest.jpg', $options); // To generate a modified new file.

Config file

The config file (application/config/jpegtranlib.php) has the following structure:

$config['library_path'] = '';   // Empty if the library is in the PATH
$config['perfect']      = TRUE; // Indicates if the -perfect param must be appended
$config['maxmemory']    = '1m'; // The maxmemory value. Not appended if empty

Allowed options

Read man pages for jpegtran to learn about each of them:

• optimize
• progressive
• restart
• arithmetic
• flip
• rotate
• transpose
• transverse
• trim
• perfect
• crop
• grayscale
• copy

Installation

1. Drop the provided files into your CodeIgniter project.
2. Configure the library_path parameter, if jpegtran is not directly accessible.
3. Configure the maxmemory parameter to suit your system needs.