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230 lines
11 KiB
ReStructuredText
230 lines
11 KiB
ReStructuredText
9.1.0
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-----
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API Changes
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===========
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Raise an error when performing a negative crop
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Performing a negative crop on an image previously just returned a ``(0, 0)`` image. Now
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it will raise a :py:exc:`ValueError`, to help reduce confusion if a user has unintentionally
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provided the wrong arguments.
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Added specific error if path coordinate type is incorrect
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Rather than returning a :py:exc:`SystemError`, passing the incorrect types of coordinates into
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a path will now raise a more specific :py:exc:`ValueError`, with the message "incorrect
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coordinate type".
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Replace requirements.txt with extras
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Rather than installing all dependencies for docs and tests via ``requirements.txt``,
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``extras_require`` is used instead. This installs only those needed and at the same
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time as installing Pillow.
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For example:
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.. code-block:: bash
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# Install with dependencies for tests:
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python3 -m pip install .[tests]
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# Or for building docs:
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python3 -m pip install .[docs]
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# Or for all:
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python3 -m pip install .[docs,tests]
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On macOS, the last argument may need to be wrapped in quotes, e.g.
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``python3 -m pip install ".[tests]"``
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Therefore ``requirements.txt`` has been removed along with the ``make install-req``
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command for installing its contents.
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Deprecations
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============
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Constants
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^^^^^^^^^
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A number of constants have been deprecated and will be removed in Pillow 10.0.0
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(2023-07-01). Instead, ``enum.IntEnum`` classes have been added.
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.. note::
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Some of these deprecations were restored in Pillow 9.4.0. See
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:ref:`restored-image-constants`
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===================================================== ============================================================
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Deprecated Use instead
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===================================================== ============================================================
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``Image.NONE`` Either ``Image.Dither.NONE`` or ``Image.Resampling.NEAREST``
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``Image.NEAREST`` Either ``Image.Dither.NONE`` or ``Image.Resampling.NEAREST``
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``Image.ORDERED`` ``Image.Dither.ORDERED``
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``Image.RASTERIZE`` ``Image.Dither.RASTERIZE``
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``Image.FLOYDSTEINBERG`` ``Image.Dither.FLOYDSTEINBERG``
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``Image.WEB`` ``Image.Palette.WEB``
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``Image.ADAPTIVE`` ``Image.Palette.ADAPTIVE``
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``Image.AFFINE`` ``Image.Transform.AFFINE``
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``Image.EXTENT`` ``Image.Transform.EXTENT``
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``Image.PERSPECTIVE`` ``Image.Transform.PERSPECTIVE``
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``Image.QUAD`` ``Image.Transform.QUAD``
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``Image.MESH`` ``Image.Transform.MESH``
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``Image.FLIP_LEFT_RIGHT`` ``Image.Transpose.FLIP_LEFT_RIGHT``
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``Image.FLIP_TOP_BOTTOM`` ``Image.Transpose.FLIP_TOP_BOTTOM``
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``Image.ROTATE_90`` ``Image.Transpose.ROTATE_90``
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``Image.ROTATE_180`` ``Image.Transpose.ROTATE_180``
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``Image.ROTATE_270`` ``Image.Transpose.ROTATE_270``
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``Image.TRANSPOSE`` ``Image.Transpose.TRANSPOSE``
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``Image.TRANSVERSE`` ``Image.Transpose.TRANSVERSE``
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``Image.BOX`` ``Image.Resampling.BOX``
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``Image.BILINEAR`` ``Image.Resampling.BILINEAR``
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``Image.LINEAR`` ``Image.Resampling.BILINEAR``
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``Image.HAMMING`` ``Image.Resampling.HAMMING``
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``Image.BICUBIC`` ``Image.Resampling.BICUBIC``
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``Image.CUBIC`` ``Image.Resampling.BICUBIC``
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``Image.LANCZOS`` ``Image.Resampling.LANCZOS``
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``Image.ANTIALIAS`` ``Image.Resampling.LANCZOS``
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``Image.MEDIANCUT`` ``Image.Quantize.MEDIANCUT``
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``Image.MAXCOVERAGE`` ``Image.Quantize.MAXCOVERAGE``
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``Image.FASTOCTREE`` ``Image.Quantize.FASTOCTREE``
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``Image.LIBIMAGEQUANT`` ``Image.Quantize.LIBIMAGEQUANT``
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``ImageCms.INTENT_PERCEPTUAL`` ``ImageCms.Intent.PERCEPTUAL``
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``ImageCms.INTENT_RELATIVE_COLORMETRIC`` ``ImageCms.Intent.RELATIVE_COLORMETRIC``
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``ImageCms.INTENT_SATURATION`` ``ImageCms.Intent.SATURATION``
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``ImageCms.INTENT_ABSOLUTE_COLORIMETRIC`` ``ImageCms.Intent.ABSOLUTE_COLORIMETRIC``
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``ImageCms.DIRECTION_INPUT`` ``ImageCms.Direction.INPUT``
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``ImageCms.DIRECTION_OUTPUT`` ``ImageCms.Direction.OUTPUT``
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``ImageCms.DIRECTION_PROOF`` ``ImageCms.Direction.PROOF``
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``ImageFont.LAYOUT_BASIC`` ``ImageFont.Layout.BASIC``
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``ImageFont.LAYOUT_RAQM`` ``ImageFont.Layout.RAQM``
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``BlpImagePlugin.BLP_FORMAT_JPEG`` ``BlpImagePlugin.Format.JPEG``
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``BlpImagePlugin.BLP_ENCODING_UNCOMPRESSED`` ``BlpImagePlugin.Encoding.UNCOMPRESSED``
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``BlpImagePlugin.BLP_ENCODING_DXT`` ``BlpImagePlugin.Encoding.DXT``
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``BlpImagePlugin.BLP_ENCODING_UNCOMPRESSED_RAW_RGBA`` ``BlpImagePlugin.Encoding.UNCOMPRESSED_RAW_RGBA``
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``BlpImagePlugin.BLP_ALPHA_ENCODING_DXT1`` ``BlpImagePlugin.AlphaEncoding.DXT1``
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``BlpImagePlugin.BLP_ALPHA_ENCODING_DXT3`` ``BlpImagePlugin.AlphaEncoding.DXT3``
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``BlpImagePlugin.BLP_ALPHA_ENCODING_DXT5`` ``BlpImagePlugin.AlphaEncoding.DXT5``
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``FtexImagePlugin.FORMAT_DXT1`` ``FtexImagePlugin.Format.DXT1``
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``FtexImagePlugin.FORMAT_UNCOMPRESSED`` ``FtexImagePlugin.Format.UNCOMPRESSED``
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``PngImagePlugin.APNG_DISPOSE_OP_NONE`` ``PngImagePlugin.Disposal.OP_NONE``
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``PngImagePlugin.APNG_DISPOSE_OP_BACKGROUND`` ``PngImagePlugin.Disposal.OP_BACKGROUND``
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``PngImagePlugin.APNG_DISPOSE_OP_PREVIOUS`` ``PngImagePlugin.Disposal.OP_PREVIOUS``
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``PngImagePlugin.APNG_BLEND_OP_SOURCE`` ``PngImagePlugin.Blend.OP_SOURCE``
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``PngImagePlugin.APNG_BLEND_OP_OVER`` ``PngImagePlugin.Blend.OP_OVER``
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===================================================== ============================================================
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ImageShow.Viewer.show_file file argument
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The ``file`` argument in :py:meth:`~PIL.ImageShow.Viewer.show_file()` has been
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deprecated and will be removed in Pillow 10.0.0 (2023-07-01). It has been replaced by
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``path``.
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In effect, ``viewer.show_file("test.jpg")`` will continue to work unchanged.
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``viewer.show_file(file="test.jpg")`` will raise a deprecation warning, and suggest
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``viewer.show_file(path="test.jpg")`` instead.
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FitsStubImagePlugin
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^^^^^^^^^^^^^^^^^^^
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.. deprecated:: 9.1.0
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The stub image plugin ``FitsStubImagePlugin`` has been deprecated and will be removed in
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Pillow 10.0.0 (2023-07-01). FITS images can be read without a handler through
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:mod:`~PIL.FitsImagePlugin` instead.
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API Additions
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=============
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Added get_photoshop_blocks() to parse Photoshop TIFF tag
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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:py:meth:`~PIL.TiffImagePlugin.TiffImageFile.get_photoshop_blocks` has been added, to
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allow users to determine what Photoshop "Image Resource Blocks" are contained within an
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image. The keys of the returned dictionary are the image resource IDs.
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At present, the information within each block is merely returned as a dictionary with a
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"data" entry. This will allow more useful information to be added in the future without
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breaking backwards compatibility.
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Added mct and no_jp2 options for saving JPEG 2000
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The :py:meth:`PIL.Image.Image.save` method now supports the following options for
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JPEG 2000:
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**mct**
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If ``1`` then enable multiple component transformation when encoding,
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otherwise use ``0`` for no component transformation (default). If MCT is
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enabled and ``irreversible`` is ``True`` then the Irreversible Color
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Transformation will be applied, otherwise encoding will use the
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Reversible Color Transformation. MCT works best with a ``mode`` of
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``RGB`` and is only applicable when the image data has 3 components.
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**no_jp2**
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If ``True`` then don't wrap the raw codestream in the JP2 file format when
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saving, otherwise the extension of the filename will be used to determine
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the format (default).
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Added PyEncoder
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^^^^^^^^^^^^^^^
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:py:class:`~PIL.ImageFile.PyEncoder` has been added, allowing for file encoders to be
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written in Python. See :ref:`Writing Your Own File Codec in Python<file-codecs-py>` for
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more information.
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GifImagePlugin loading strategy
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Pillow 9.0.0 introduced the conversion of subsequent GIF frames to ``RGB`` or ``RGBA``. This
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behaviour can now be changed so that the first ``P`` frame is converted to ``RGB`` as
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well. ::
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from PIL import GifImagePlugin
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GifImagePlugin.LOADING_STRATEGY = GifImagePlugin.LoadingStrategy.RGB_ALWAYS
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Or subsequent frames can be kept in ``P`` mode as long as there is only a single
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palette. ::
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from PIL import GifImagePlugin
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GifImagePlugin.LOADING_STRATEGY = GifImagePlugin.LoadingStrategy.RGB_AFTER_DIFFERENT_PALETTE_ONLY
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Other Changes
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=============
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musllinux wheels
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^^^^^^^^^^^^^^^^
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Pillow now builds binary wheels for musllinux, suitable for Linux distributions based on the musl C standard library such as Alpine
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(rather than the glibc library used by manylinux wheels). See :pep:`656`.
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ImageShow temporary files on Unix
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When calling :py:meth:`~PIL.Image.Image.show` or using :py:mod:`~PIL.ImageShow`,
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a temporary file is created from the image. On Unix, Pillow will no longer delete these
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files, and instead leave it to the operating system to do so.
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Image._repr_pretty_
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^^^^^^^^^^^^^^^^^^^
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``im._repr_pretty_`` has been added to provide a representation of an image without the
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identity of the object. This allows Jupyter to describe an image and have that
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description stay the same on subsequent executions of the same code.
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Added BigTIFF reading
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^^^^^^^^^^^^^^^^^^^^^
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Support has been added for reading BigTIFF images.
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Added BLP saving
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^^^^^^^^^^^^^^^^
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Support has been added for saving BLP images. ``blp_version`` can be used to specify
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whether the image should be saved as BLP1 or BLP2, e.g.
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``im.save("out.blp", blp_version="BLP1")``. By default, BLP2 will be used.
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