11.0.0
------

Backwards incompatible changes
==============================

Python 3.8
^^^^^^^^^^

Pillow has dropped support for Python 3.8,
which reached end-of-life in October 2024.

Python 3.12 on macOS <= 10.12
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The latest version of Python 3.12 only supports macOS versions 10.13 and later,
and so Pillow has also updated the deployment target for its prebuilt Python 3.12
wheels.

PSFile
^^^^^^

The :py:class:`!PSFile` class was removed in Pillow 11 (2024-10-15).
This class was only made as a helper to be used internally,
so there is no replacement. If you need this functionality though,
it is a very short class that can easily be recreated in your own code.

PyAccess and Image.USE_CFFI_ACCESS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Since Pillow's C API is now faster than PyAccess on PyPy, ``PyAccess`` has been
removed. Pillow's C API will now be used on PyPy instead.

``Image.USE_CFFI_ACCESS``, for switching from the C API to PyAccess, was
similarly removed.

TiffImagePlugin IFD_LEGACY_API
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

An unused setting, ``TiffImagePlugin.IFD_LEGACY_API``, has been removed.

WebP 0.4
^^^^^^^^

Support for WebP 0.4 and earlier has been removed; WebP 0.5 is the minimum supported.

Deprecations
============

FreeType 2.9.0
^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

Support for FreeType 2.9.0 is deprecated and will be removed in Pillow 12.0.0
(2025-10-15), when FreeType 2.9.1 will be the minimum supported.

We recommend upgrading to at least FreeType `2.10.4`_, which fixed a severe
vulnerability introduced in FreeType 2.6 (:cve:`2020-15999`).

.. _2.10.4: https://sourceforge.net/projects/freetype/files/freetype2/2.10.4/

Get internal pointers to objects
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

``Image.core.ImagingCore.id`` and ``Image.core.ImagingCore.unsafe_ptrs`` have been
deprecated and will be removed in Pillow 12 (2025-10-15). They were used for obtaining
raw pointers to ``ImagingCore`` internals. To interact with C code, you can use
``Image.Image.getim()``, which returns a ``Capsule`` object.

ICNS (width, height, scale) sizes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

Setting an ICNS image size to ``(width, height, scale)`` before loading has been
deprecated. Instead, ``load(scale)`` can be used.

Image isImageType()
^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

``Image.isImageType(im)`` has been deprecated. Use ``isinstance(im, Image.Image)``
instead.

ImageMath.lambda_eval and ImageMath.unsafe_eval options parameter
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

The ``options`` parameter in :py:meth:`~PIL.ImageMath.lambda_eval()` and
:py:meth:`~PIL.ImageMath.unsafe_eval()` has been deprecated. One or more
keyword arguments can be used instead.

JpegImageFile.huffman_ac and JpegImageFile.huffman_dc
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

The ``huffman_ac`` and ``huffman_dc`` dictionaries on JPEG images were unused. They
have been deprecated, and will be removed in Pillow 12 (2025-10-15).

Specific WebP feature checks
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. deprecated:: 11.0.0

``features.check("transp_webp")``, ``features.check("webp_mux")`` and
``features.check("webp_anim")`` are now deprecated. They will always return
``True`` if the WebP module is installed, until they are removed in Pillow
12.0.0 (2025-10-15).

API changes
===========

Default resampling filter for I;16* image modes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The default resampling filter for I;16, I;16L, I;16B and I;16N has been changed from
``Image.NEAREST`` to ``Image.BICUBIC``, to match the majority of modes.

API additions
=============

Writing XMP bytes to JPEG and MPO
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

XMP data can now be saved to JPEG files using an ``xmp`` argument::

    im.save("out.jpg", xmp=b"test")

The data can also be set through :py:attr:`~PIL.Image.Image.info`, for use when saving
either JPEG or MPO images::

    im.info["xmp"] = b"test"
    im.save("out.jpg")

Other changes
=============

Python 3.13
^^^^^^^^^^^

Pillow 10.4.0 had wheels built against Python 3.13 beta, available as a preview to help
others prepare for 3.13, and to ensure Pillow could be used immediately at the release
of 3.13.0 final (2024-10-07, :pep:`719`).

Pillow 11.0.0 now officially supports Python 3.13.

Support has also been added for the experimental free-threaded mode of :pep:`703`.

Python 3.13 only supports macOS versions 10.13 and later.

C-level flags
^^^^^^^^^^^^^

Some compiling flags like ``WITH_THREADING``, ``WITH_IMAGECHOPS``, and other
``WITH_*`` were removed. These flags were not available through the build system,
but they could be edited in the C source.
