Pillow/README.rst

Pillow
======

*Python Imaging Library (Fork)*

Pillow is the "friendly" PIL fork by Alex Clark and Contributors. PIL is the Python Imaging Library by Fredrik Lundh and Contributors.

.. image:: https://travis-ci.org/python-imaging/Pillow.png
   :target: https://travis-ci.org/python-imaging/Pillow

.. image:: https://pypip.in/v/Pillow/badge.png
    :target: https://pypi.python.org/pypi/Pillow/
    :alt: Latest PyPI version

.. image:: https://pypip.in/d/Pillow/badge.png
    :target: https://pypi.python.org/pypi/Pillow/
    :alt: Number of PyPI downloads

Introduction
------------

.. Note:: Pillow >= 2.1.0 no longer supports "import _imaging". Please use "from PIL.Image import core as _imaging" instead.

.. Note:: Pillow < 2.0.0 supports Python versions 2.4, 2.5, 2.6, 2.7; Pillow >= 2.0.0 supports Python versions 2.6, 2.7, 3.2, 3.3.

The fork author's goal is to foster active development of PIL through:

- Continuous integration testing via `Travis CI <https://travis-ci.org/python-imaging/Pillow>`_
- Publicized development activity on `GitHub <https://github.com/python-imaging/Pillow>`_
- Regular releases to the `Python Package Index <https://pypi.python.org/pypi/Pillow>`_
- Solicitation for community contributions and involvement on `Image-SIG <http://mail.python.org/mailman/listinfo/image-sig>`_

Why a fork?
~~~~~~~~~~~

PIL is not setuptools compatible. Please see http://mail.python.org/pipermail/image-sig/2010-August/006480.html for a more detailed explanation. Also, PIL's current bi-yearly (or greater) release schedule is too infrequent to accomodate the large number and frequency of issues reported.

What about the official PIL?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. Note:: Prior to Pillow 2.0.0, very few image code changes were made. Pillow 2.0.0 added Python 3 support and includes many bug fixes from many contributors.

As more time passes since the last PIL release, the likelyhood of a new PIL release decreases. However, we've yet to hear an official "PIL is dead" announcement. So if you still want to support PIL, please report issues here first:

- https://bitbucket.org/effbot/pil-2009-raclette/issues

Then open a Pillow ticket here:

- https://github.com/python-imaging/Pillow/issues

Please provide a link to the PIL ticket so we can track the issue(s) upstream.

Installation
------------

.. Note:: PIL and Pillow currently cannot co-exist in the same environment. If you want to use Pillow, please remove PIL first.

You can install Pillow with ``pip``::

    $ pip install Pillow

Or ``easy_install`` (for installing `Python Eggs <http://peak.telecommunity.com/DevCenter/PythonEggs>`_, as pip does not support them)::

    $ easy_install Pillow

Or download the compressed archive from PyPI, extract it, and inside it run::

    $ python setup.py install

For more information, please see http://pillow.readthedocs.org/en/latest/ or below.

Documentation
-------------

The API documentation included with PIL has been converted (from HTML generated by pythondoc) to reStructured text (via pandoc) and is now `hosted by readthedocs.org <http://pillow.readthedocs.org>`_. This is a work in progress: in order to re-generate new API documentation, either `pythondoc <http://effbot.org/zone/pythondoc.htm>`_ will have to be run again or the pythondoc functionality must be converted to Sphinx.

Community Support
-----------------

Developer
~~~~~~~~~

PIL needs you! Please help us maintain the Python Imaging Library here:

- GitHub (https://github.com/python-imaging/Pillow)
- Freenode (irc://irc.freenode.net#pil)
- Image-SIG (http://mail.python.org/mailman/listinfo/image-sig)

Financial
~~~~~~~~~

Pillow is a volunteer effort led by Alex Clark. If you can't help with development, please help us financially; your assistance is very much needed and appreciated!

.. Note:: Contributors: please add your name and donation preference here. 

+--------------------------------------+---------------------------------------+
| **Developer**                        | **Preference**                        |
+--------------------------------------+---------------------------------------+
| Alex Clark (fork author)             | http://gittip.com/aclark4life         |
+--------------------------------------+---------------------------------------+

Developer Notes
---------------

.. Note:: If there is a binary package for your system, that is the easiest way to install Pillow. Currently we only provide binaries for Windows (via Python eggs).

Build from source
~~~~~~~~~~~~~~~~~

Many of Pillow's features require external libraries:

* **libjpeg** provides JPEG functionality.

  * Pillow has been tested with libjpeg versions **6b**, **8**, and **9**

* **zlib** provides access to compressed PNGs

* **libtiff** provides group4 tiff functionality

  * Pillow has been tested with libtiff versions **3.x** and **4.0**

* **libfreetype** provides type related services

* **littlecms** provides color management

* **libwebp** provides the Webp format.

  * Pillow has been tested with version **0.1.3**, which does not read transparent webp files. Version **0.3.0** supports transparency.

* **tcl/tk** provides support for tkinter bitmap and photo images. 

If the prerequisites are installed in the standard library locations for your machine (e.g. /usr or /usr/local), no additional configuration should be required. If they are installed in a non-standard location, you may need to configure setuptools to use those locations (i.e. by editing setup.py and/or setup.cfg). Once you have installed the prerequisites, run::

    $ pip install Pillow

Platform-specific instructions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Linux
+++++

**We do not provide binaries for Linux.** If you didn't build Python from source, make sure you have Python's development libraries installed. In Debian or Ubuntu::

    $ sudo apt-get install python-dev python-setuptools

Or for Python 3::

    $ sudo apt-get install python3-dev python3-setuptools

Prerequisites are installed on **Ubuntu 10.04 LTS** with::

    $ sudo apt-get install libtiff4-dev libjpeg62-dev zlib1g-dev libfreetype6-dev liblcms1-dev tcl8.5-dev tk8.5-dev

Prerequisites are installed with on **Ubuntu 12.04 LTS** or **Raspian Wheezy 7.0** with::

    $ sudo apt-get install libtiff4-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms1-dev libwebp-dev tcl8.5-dev tk8.5-dev

Distributions
^^^^^^^^^^^^^

.. Note:: XXX Provide links

Additionally, many Linux distributions now include Pillow (instead of PIL) with their distribution:

- Fedora
- Debian/Ubuntu
- ArchLinux

Mac OS X
++++++++

**We do not provide binaries for OS X.** So you'll need XCode to install Pillow. (XCode 4.2 on 10.6 will work with the Official Python binary distribution. Otherwise, use whatever XCode you used to compile Python.)

The easiest way to install the prerequisites is via `Homebrew <http://mxcl.github.com/homebrew/>`_. After you install Homebrew, run::

    $ brew install libtiff libjpeg webp littlecms

If you've built your own Python, then you should be able to install Pillow using::

    $ pip install Pillow

Windows
+++++++

We provide binaries for Windows in the form of Python Eggs and `Python Wheels <http://wheel.readthedocs.org/en/latest/index.html>`_:

Python Eggs
^^^^^^^^^^^

.. Note:: Pip does not support Python Eggs; use easy_install instead.

::

    $ easy_install Pillow

Python Wheels
^^^^^^^^^^^^^

.. Note:: Experimental. Requires Setuptools >=0.8 and Pip >=1.4.1

::

    $ pip install --use-wheel Pillow

Platform support
~~~~~~~~~~~~~~~~

Current platform support for Pillow. Binary distributions are contributed for each release on a volunteer basis, but the source should compile and run everywhere platform support is listed. In general, we aim to support all current versions of Linux, OS X, and Windows.

.. Note:: Contributors please test on your platform, edit this document and send a pull request

+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+ 
|**Operating system**              |**Supported**|**Tested Python versions**    |**Tested Pillow versions**    |**Tested processors**  |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| CentOS 6.3                       |Yes          | 2.7,3.3                      |                              |x86                    |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Mac OS X 10.8 Mountain Lion      |Yes          | 2.6,2.7,3.2,3.3              |                              |x86-64                 |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Mac OS X 10.7 Lion               |Yes          | 2.6,2.7,3.2,3.3              | 2.2.0                        |x86-64                 |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Redhat Linux 6                   |Yes          | 2.6                          |                              |x86                    |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Ubuntu Linux 10.04 LTS           |Yes          | 2.6                          | 2.2.0                        |x86,x86-64             |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Ubuntu Linux 12.04 LTS           |Yes          | 2.6,2.7,3.2,3.3,PyPy2.1      | 2.2.0                        |x86,x86-64             |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Raspian Wheezy                   |Yes          | 2.7,3.2                      | 2.2.0                        |arm                    |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Gentoo Linux                     |Yes          | 2.7,3.2                      | 2.1.0                        |x86-64                 |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Windows 7 Pro                    |Yes          | 2.7,3.2                      |                              |x86                    |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Windows Server 2008 R2 Enterprise|Yes          | 3.3                          |                              |x86-64                 |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+
| Windows 8 Pro                    |Yes          | 2.6,2.7,3.2,3.3,3.4a3        | 2.2.0                        |x86,x86-64             |
+----------------------------------+-------------+------------------------------+------------------------------+-----------------------+


Port existing PIL-based code to Pillow
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Pillow is a functional drop-in replacement for the Python Imaging Library. To run your existing PIL-compatible code with Pillow, it needs to be modified to import the ``Imaging`` module from the ``PIL`` namespace *instead* of the global namespace. I.e. change::

    import Image

to::

    from PIL import Image

.. Note:: If your code imports from ``_imaging``, it will no longer work.

The preferred, future proof method of importing the private ``_imaging`` module is::

    from PIL import Image
    _imaging = Image.core

Python Imaging Library
======================

.. Note:: What follows is the original PIL 1.1.7 README file contents.

::

    The Python Imaging Library
    $Id$

    Release 1.1.7 (November 15, 2009)

    ====================================================================
    The Python Imaging Library 1.1.7
    ====================================================================

    Contents
    --------

    + Introduction
    + Support Options
      - Commercial support
      - Free support
    + Software License
    + Build instructions (all platforms)
      - Additional notes for Mac OS X
      - Additional notes for Windows

    --------------------------------------------------------------------
    Introduction
    --------------------------------------------------------------------

    The Python Imaging Library (PIL) adds image processing capabilities
    to your Python environment.  This library provides extensive file
    format support, an efficient internal representation, and powerful
    image processing capabilities.

    This source kit has been built and tested with Python 2.0 and newer,
    on Windows, Mac OS X, and major Unix platforms.  Large parts of the
    library also work on 1.5.2 and 1.6.

    The main distribution site for this software is:

            http://www.pythonware.com/products/pil/

    That site also contains information about free and commercial support
    options, PIL add-ons, answers to frequently asked questions, and more.


    Development versions (alphas, betas) are available here:

            http://effbot.org/downloads/


    The PIL handbook is not included in this distribution; to get the
    latest version, check:

            http://www.pythonware.com/library/
            http://effbot.org/books/imagingbook/ (drafts)


    For installation and licensing details, see below.


    --------------------------------------------------------------------
    Support Options
    --------------------------------------------------------------------

    + Commercial Support

    Secret Labs (PythonWare) offers support contracts for companies using
    the Python Imaging Library in commercial applications, and in mission-
    critical environments.  The support contract includes technical support,
    bug fixes, extensions to the PIL library, sample applications, and more.

    For the full story, check:

            http://www.pythonware.com/products/pil/support.htm


    + Free Support

    For support and general questions on the Python Imaging Library, send
    e-mail to the Image SIG mailing list:

            image-sig@python.org

    You can join the Image SIG by sending a mail to:

            image-sig-request@python.org

    Put "subscribe" in the message body to automatically subscribe to the
    list, or "help" to get additional information.  Alternatively, you can
    send your questions to the Python mailing list, python-list@python.org,
    or post them to the newsgroup comp.lang.python.  DO NOT SEND SUPPORT
    QUESTIONS TO PYTHONWARE ADDRESSES.


    --------------------------------------------------------------------
    Software License
    --------------------------------------------------------------------

    The Python Imaging Library is

    Copyright (c) 1997-2009 by Secret Labs AB
    Copyright (c) 1995-2009 by Fredrik Lundh

    By obtaining, using, and/or copying this software and/or its
    associated documentation, you agree that you have read, understood,
    and will comply with the following terms and conditions:

    Permission to use, copy, modify, and distribute this software and its
    associated documentation for any purpose and without fee is hereby
    granted, provided that the above copyright notice appears in all
    copies, and that both that copyright notice and this permission notice
    appear in supporting documentation, and that the name of Secret Labs
    AB or the author not be used in advertising or publicity pertaining to
    distribution of the software without specific, written prior
    permission.

    SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO
    THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS.  IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR BE LIABLE FOR
    ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
    OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


    --------------------------------------------------------------------
    Build instructions (all platforms)
    --------------------------------------------------------------------

    For a list of changes in this release, see the CHANGES document.

    0. If you're in a hurry, try this:

            $ tar xvfz Imaging-1.1.7.tar.gz
            $ cd Imaging-1.1.7
            $ python setup.py install

       If you prefer to know what you're doing, read on.


    1. Prerequisites.

       If you need any of the features described below, make sure you
       have the necessary libraries before building PIL.

       feature              library
       -----------------------------------------------------------------
       JPEG support         libjpeg (6a or 6b)

                            http://www.ijg.org
                            http://www.ijg.org/files/jpegsrc.v6b.tar.gz
                            ftp://ftp.uu.net/graphics/jpeg/

       PNG support          zlib (1.2.3 or later is recommended)

                            http://www.gzip.org/zlib/

       OpenType/TrueType    freetype2 (2.3.9 or later is recommended)
       support
                            http://www.freetype.org
                            http://freetype.sourceforge.net

       CMS support          littleCMS (1.1.5 or later is recommended)
       support
                            http://www.littlecms.com/

       If you have a recent Linux version, the libraries provided with the
       operating system usually work just fine.  If some library is
       missing, installing a prebuilt version (jpeg-devel, zlib-devel,
       etc) is usually easier than building from source.  For example, for
       Ubuntu 9.10 (karmic), you can install the following libraries:

           sudo apt-get install libjpeg62-dev
           sudo apt-get install zlib1g-dev
           sudo apt-get install libfreetype6-dev
           sudo apt-get install liblcms1-dev

       If you're using Mac OS X, you can use the 'fink' tool to install
       missing libraries (also see the Mac OS X section below).

       Similar tools are available for many other platforms.


    2. To build under Python 1.5.2, you need to install the stand-alone
       version of the distutils library:

           http://www.python.org/sigs/distutils-sig/download.html

       You can fetch distutils 1.0.2 from the Python source repository:

           svn export http://svn.python.org/projects/python/tags/Distutils-1_0_2/Lib/distutils/

       For newer releases, the distutils library is included in the
       Python standard library.

       NOTE: Version 1.1.7 is not fully compatible with 1.5.2.  Some
       more recent additions to the library may not work, but the core
       functionality is available.


    3. If you didn't build Python from sources, make sure you have
       Python's build support files on your machine.  If you've down-
       loaded a prebuilt package (e.g. a Linux RPM), you probably
       need additional developer packages.  Look for packages named
       "python-dev", "python-devel", or similar.  For example, for
       Ubuntu 9.10 (karmic), use the following command:

           sudo apt-get install python-dev


    4. When you have everything you need, unpack the PIL distribution
       (the file Imaging-1.1.7.tar.gz) in a suitable work directory:

            $ cd MyExtensions # example
            $ gunzip Imaging-1.1.7.tar.gz
            $ tar xvf Imaging-1.1.7.tar


    5. Build the library.  We recommend that you do an in-place build,
       and run the self test before installing.

            $ cd Imaging-1.1.7
            $ python setup.py build_ext -i
            $ python selftest.py

       During the build process, the setup.py will display a summary
       report that lists what external components it found.  The self-
       test will display a similar report, with what external components
       the tests found in the actual build files:

            ----------------------------------------------------------------
            PIL 1.1.7 SETUP SUMMARY
            ----------------------------------------------------------------
            *** TKINTER support not available (Tcl/Tk 8.5 libraries needed)
            --- JPEG support available
            --- ZLIB (PNG/ZIP) support available
            --- FREETYPE support available
            ----------------------------------------------------------------

       Make sure that the optional components you need are included.

       If the build script won't find a given component, you can edit the
       setup.py file and set the appropriate ROOT variable.  For details,
       see instructions in the file.

       If the build script finds the component, but the tests cannot
       identify it, try rebuilding *all* modules:

            $ python setup.py clean
            $ python setup.py build_ext -i


    6. If the setup.py and selftest.py commands finish without any
       errors, you're ready to install the library:

            $ python setup.py install

       (depending on how Python has been installed on your machine,
       you might have to log in as a superuser to run the 'install'
       command, or use the 'sudo' command to run 'install'.)


    --------------------------------------------------------------------
    Additional notes for Mac OS X
    --------------------------------------------------------------------

    On Mac OS X you will usually install additional software such as
    libjpeg or freetype with the "fink" tool, and then it ends up in
    "/sw".  If you have installed the libraries elsewhere, you may have
    to tweak the "setup.py" file before building.


    --------------------------------------------------------------------
    Additional notes for Windows
    --------------------------------------------------------------------

    On Windows, you need to tweak the ROOT settings in the "setup.py"
    file, to make it find the external libraries.  See comments in the
    file for details.

    Make sure to build PIL and the external libraries with the same
    runtime linking options as was used for the Python interpreter
    (usually /MD, under Visual Studio).


    Note that most Python distributions for Windows include libraries
    compiled for Microsoft Visual Studio.  You can get the free Express
    edition of Visual Studio from:

        http://www.microsoft.com/Express/

    To build extensions using other tool chains, see the "Using
    non-Microsoft compilers on Windows" section in the distutils handbook:

        http://www.python.org/doc/current/inst/non-ms-compilers.html

    For additional information on how to build extensions using the
    popular MinGW compiler, see:

        http://mingw.org (compiler)
        http://sebsauvage.net/python/mingw.html (build instructions)
        http://sourceforge.net/projects/gnuwin32 (prebuilt libraries)