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162 lines
5.7 KiB
ReStructuredText
162 lines
5.7 KiB
ReStructuredText
10.2.0
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------
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Deprecations
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============
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ImageFile.raise_oserror
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^^^^^^^^^^^^^^^^^^^^^^^
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``ImageFile.raise_oserror()`` has been deprecated and will be removed in Pillow
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12.0.0 (2025-10-15). The function is undocumented and is only useful for translating
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error codes returned by a codec's ``decode()`` method, which ImageFile already does
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automatically.
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IptcImageFile helper functions
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The functions ``IptcImageFile.dump`` and ``IptcImageFile.i``, and the constant
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``IptcImageFile.PAD`` have been deprecated and will be removed in Pillow
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12.0.0 (2025-10-15). These are undocumented helper functions intended
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for internal use, so there is no replacement. They can each be replaced
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by a single line of code using builtin functions in Python.
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API Changes
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===========
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Zero or negative font size error
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When creating a :py:class:`~PIL.ImageFont.FreeTypeFont` instance, either directly or
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through :py:func:`~PIL.ImageFont.truetype`, if the font size is zero or less, a
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:py:exc:`ValueError` will now be raised.
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API Additions
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=============
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Added DdsImagePlugin enums
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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:py:class:`~PIL.DdsImagePlugin.DDSD`, :py:class:`~PIL.DdsImagePlugin.DDSCAPS`,
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:py:class:`~PIL.DdsImagePlugin.DDSCAPS2`, :py:class:`~PIL.DdsImagePlugin.DDPF`,
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:py:class:`~PIL.DdsImagePlugin.DXGI_FORMAT` and :py:class:`~PIL.DdsImagePlugin.D3DFMT`
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enums have been added to :py:class:`PIL.DdsImagePlugin`.
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JPEG RGB color space
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^^^^^^^^^^^^^^^^^^^^
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When saving JPEG files, ``keep_rgb`` can now be set to ``True``. This will store RGB
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images in the RGB color space instead of being converted to YCbCr automatically by
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libjpeg. When this option is enabled, attempting to chroma-subsample RGB images with
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the ``subsampling`` option will raise an :py:exc:`OSError`.
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JPEG restart marker interval
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When saving JPEG files, ``restart_marker_blocks`` and ``restart_marker_rows`` can now
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be used to emit restart markers whenever the specified number of MCU blocks or rows
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have been produced.
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JPEG tables-only streamtype
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When saving JPEG files, ``streamtype`` can now be set to 1, for tables-only. This will
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output only the quantization and Huffman tables for the image.
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Security
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========
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ImageFont.getmask: Applied ImageFont.MAX_STRING_LENGTH
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To protect against potential DOS attacks when using arbitrary strings as text input,
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Pillow will now raise a :py:exc:`ValueError` if the number of characters passed into
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:py:meth:`PIL.ImageFont.ImageFont.getmask` is over a certain limit,
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:py:data:`PIL.ImageFont.MAX_STRING_LENGTH`.
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This threshold can be changed by setting :py:data:`PIL.ImageFont.MAX_STRING_LENGTH`. It
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can be disabled by setting ``ImageFont.MAX_STRING_LENGTH = None``.
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A decompression bomb check has also been added to
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:py:meth:`PIL.ImageFont.ImageFont.getmask`.
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ImageFont.getmask: Trim glyph size
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To protect against potential DOS attacks when using PIL fonts,
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:py:class:`PIL.ImageFont.ImageFont` now trims the size of individual glyphs so that
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they do not extend beyond the bitmap image.
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ImageMath.eval: Restricted environment keys
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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:cve:`2023-50447`: If an attacker has control over the keys passed to the
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``environment`` argument of :py:meth:`PIL.ImageMath.eval`, they may be able to execute
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arbitrary code. To prevent this, keys matching the names of builtins and keys
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containing double underscores will now raise a :py:exc:`ValueError`.
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Other Changes
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=============
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Added DDS BC4U and DX10 BC1 and BC4 reading
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Support has been added to read the BC4U format of DDS images.
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Support has also been added to read DX10 BC1 and BC4, whether UNORM or
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TYPELESS.
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Support arbitrary masks for uncompressed RGB DDS images
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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All masks are now supported when reading DDS images with uncompressed RGB data,
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allowing for bit counts other than 24 and 32.
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Saving TIFF tag RowsPerStrip
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When saving TIFF images, the TIFF tag RowsPerStrip can now be one of the tags set by
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the user, rather than always being calculated by Pillow.
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Optimized ImageColor.getrgb and getcolor
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The color calculations of :py:attr:`~PIL.ImageColor.getrgb` and
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:py:attr:`~PIL.ImageColor.getcolor` are now cached using
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:py:func:`functools.lru_cache`. Cached calls of ``getrgb`` are 3.1 - 91.4 times
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as fast and ``getcolor`` are 5.1 - 19.6 times as fast.
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Optimized ImageMode.getmode
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The lookups made by :py:attr:`~PIL.ImageMode.getmode` are now cached using
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:py:func:`functools.lru_cache` instead of a custom cache. Cached calls are 1.2 times as
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fast.
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Optimized ImageStat.Stat count and extrema
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Calculating the :py:attr:`~PIL.ImageStat.Stat.count` and
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:py:attr:`~PIL.ImageStat.Stat.extrema` statistics is now faster. After the
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histogram is created in ``st = ImageStat.Stat(im)``, ``st.count`` is 3 times as fast on
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average and ``st.extrema`` is 12 times as fast on average.
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Encoder errors now report error detail as string
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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:py:exc:`OSError` exceptions from image encoders now include a textual description of
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the error instead of a numeric error code.
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Type hints
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^^^^^^^^^^
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Work has begun to add type annotations to Pillow, including:
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* :py:mod:`~PIL.ContainerIO`
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* :py:mod:`~PIL.FontFile`, :py:mod:`~PIL.BdfFontFile` and :py:mod:`~PIL.PcfFontFile`
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* :py:mod:`~PIL.ImageChops`
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* :py:mod:`~PIL.ImageMode`
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* :py:mod:`~PIL.ImageSequence`
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* :py:mod:`~PIL.ImageTransform`
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* :py:mod:`~PIL.TarIO`
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