Pillow/docs/releasenotes/6.0.0.rst

6.0.0
-----

Backwards Incompatible Changes
==============================

Python 3.4 dropped
^^^^^^^^^^^^^^^^^^

Python 3.4 is EOL since 2019-03-16 and no longer supported. We will not be creating
binaries, testing, or retaining compatibility with this version. The final version of
Pillow for Python 3.4 is 5.4.1.

Removed deprecated PIL.OleFileIO
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

PIL.OleFileIO was removed as a vendored file and in Pillow 4.0.0 (2017-01) in favour of
the upstream olefile Python package, and replaced with an ``ImportError``. The
deprecated file has now been removed from Pillow. If needed, install from PyPI (eg.
``python3 -m pip install olefile``).

Removed deprecated ImageOps functions
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Several undocumented functions in ``ImageOps`` were deprecated in Pillow 4.3.0 (2017-10)
and have now been removed: ``gaussian_blur``, ``gblur``, ``unsharp_mask``, ``usm`` and
``box_blur``. Use the equivalent operations in ``ImageFilter`` instead.

Removed deprecated VERSION
^^^^^^^^^^^^^^^^^^^^^^^^^^

``VERSION`` (the old PIL version, always 1.1.7) has been removed. Use ``__version__``
instead.

API Changes
===========

Deprecations
^^^^^^^^^^^^

Python 2.7
~~~~~~~~~~

Python 2.7 reaches end-of-life on 2020-01-01.

Pillow 7.0.0 will be released on 2020-01-01 and will drop support for Python 2.7, making
Pillow 6.x the last series to support Python 2.

PyQt4 and PySide
~~~~~~~~~~~~~~~~

Qt 4 reached end-of-life on 2015-12-19. Its Python bindings are also EOL: PyQt4 since
2018-08-31 and PySide since 2015-10-14.

Support for PyQt4 and PySide has been deprecated from ``ImageQt`` and will be removed in
a future version. Please upgrade to PyQt5 or PySide2.

PIL.*ImagePlugin.__version__ attributes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

These version constants have been deprecated and will be removed in a future
version.

* ``BmpImagePlugin.__version__``
* ``CurImagePlugin.__version__``
* ``DcxImagePlugin.__version__``
* ``EpsImagePlugin.__version__``
* ``FliImagePlugin.__version__``
* ``FpxImagePlugin.__version__``
* ``GdImageFile.__version__``
* ``GifImagePlugin.__version__``
* ``IcoImagePlugin.__version__``
* ``ImImagePlugin.__version__``
* ``ImtImagePlugin.__version__``
* ``IptcImagePlugin.__version__``
* ``Jpeg2KImagePlugin.__version__``
* ``JpegImagePlugin.__version__``
* ``McIdasImagePlugin.__version__``
* ``MicImagePlugin.__version__``
* ``MpegImagePlugin.__version__``
* ``MpoImagePlugin.__version__``
* ``MspImagePlugin.__version__``
* ``PalmImagePlugin.__version__``
* ``PcdImagePlugin.__version__``
* ``PcxImagePlugin.__version__``
* ``PdfImagePlugin.__version__``
* ``PixarImagePlugin.__version__``
* ``PngImagePlugin.__version__``
* ``PpmImagePlugin.__version__``
* ``PsdImagePlugin.__version__``
* ``SgiImagePlugin.__version__``
* ``SunImagePlugin.__version__``
* ``TgaImagePlugin.__version__``
* ``TiffImagePlugin.__version__``
* ``WmfImagePlugin.__version__``
* ``XbmImagePlugin.__version__``
* ``XpmImagePlugin.__version__``
* ``XVThumbImagePlugin.__version__``

Use ``PIL.__version__`` instead.

ImageCms.CmsProfile attributes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Some attributes in ``ImageCms.CmsProfile`` have been deprecated since Pillow 3.2.0. From
6.0.0, they issue a ``DeprecationWarning``:

========================  ===============================
Deprecated                Use instead
========================  ===============================
``color_space``           Padded ``xcolor_space``
``pcs``                   Padded ``connection_space``
``product_copyright``     Unicode ``copyright``
``product_desc``          Unicode ``profile_description``
``product_description``   Unicode ``profile_description``
``product_manufacturer``  Unicode ``manufacturer``
``product_model``         Unicode ``model``
========================  ===============================

MIME type improvements
^^^^^^^^^^^^^^^^^^^^^^

Previously, all JPEG2000 images had the MIME type "image/jpx". This has now been
corrected. After the file format drivers have been loaded, ``Image.MIME["JPEG2000"]``
will return "image/jp2". ``ImageFile.get_format_mimetype`` will return "image/jpx" if
a JPX profile is present, or "image/jp2" otherwise.

Previously, all SGI images had the MIME type "image/rgb". This has now been
corrected. After the file format drivers have been loaded, ``Image.MIME["SGI"]``
will return "image/sgi". ``ImageFile.get_format_mimetype`` will return "image/rgb" if
RGB image data is present, or "image/sgi" otherwise.

MIME types have been added to the PPM format. After the file format drivers have been
loaded, ``Image.MIME["PPM"]`` will now return the generic "image/x-portable-anymap".
``ImageFile.get_format_mimetype`` will return a MIME type specific to the color type.

The TGA, PCX and ICO formats also now have MIME types: "image/x-tga", "image/x-pcx" and
"image/x-icon" respectively.

API Additions
=============

DIB file format
^^^^^^^^^^^^^^^

Pillow now supports reading and writing the Device Independent Bitmap file format.

Image.quantize
^^^^^^^^^^^^^^

The ``dither`` option is now a customisable parameter (was previously hardcoded to ``1``).
This parameter takes the same values used in :py:meth:`~PIL.Image.Image.convert`.

New language parameter
^^^^^^^^^^^^^^^^^^^^^^

These text-rendering functions now accept a ``language`` parameter to request
language-specific glyphs and ligatures from the font:

* ``ImageDraw.ImageDraw.multiline_text()``
* ``ImageDraw.ImageDraw.multiline_textsize()``
* ``ImageDraw.ImageDraw.text()``
* ``ImageDraw.ImageDraw.textsize()``
* ``ImageFont.ImageFont.getmask()``
* ``ImageFont.ImageFont.getsize_multiline()``
* ``ImageFont.ImageFont.getsize()``

Added EXIF class
^^^^^^^^^^^^^^^^

:py:meth:`~PIL.Image.Image.getexif` has been added, which returns an
:py:class:`~PIL.Image.Exif` instance. Values can be retrieved and set like a
dictionary. When saving JPEG, PNG or WEBP, the instance can be passed as an
``exif`` argument to include any changes in the output image.

Added ImageOps.exif_transpose
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

:py:meth:`~PIL.ImageOps.exif_transpose` returns a copy of an image, transposed
according to its EXIF Orientation tag.

PNG EXIF data
^^^^^^^^^^^^^

EXIF data can now be read from and saved to PNG images. However, unlike other image
formats, EXIF data is not guaranteed to be present in :py:attr:`~PIL.Image.Image.info`
until :py:meth:`~PIL.Image.Image.load` has been called.

Other Changes
=============

Reading new DDS image format
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Pillow can now read uncompressed RGB data from DDS images.

Reading TIFF with old-style JPEG compression
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Added support reading TIFF files with old-style JPEG compression through LibTIFF. All
YCbCr TIFF images are now always read as RGB.

TIFF compression codecs
^^^^^^^^^^^^^^^^^^^^^^^

Support has been added for the LZMA, Zstd and WebP TIFF compression codecs.

Improved support for transposing I;16 images
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I;16, I;16L and I;16B are now supported image modes for all
:py:meth:`~PIL.Image.Image.transpose` operations.