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74 lines
2.1 KiB
ReStructuredText
74 lines
2.1 KiB
ReStructuredText
8.3.0
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-----
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Deprecations
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============
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TODO
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^^^^
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TODO
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API Changes
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===========
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Changed WebP default "method" value when saving
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Previously, it was 0, for the best speed. The default has now been changed to 4, to
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match WebP's default, for higher quality with still some speed optimisation.
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Default resampling filter for special image modes
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Pillow 7.0 changed the default resampling filter to ``Image.BICUBIC``. However, as this
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is not supported yet for images with a custom number of bits, the default filter for
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those modes has been reverted to ``Image.NEAREST``.
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ImageMorph incorrect mode errors
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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For ``apply()``, ``match()`` and ``get_on_pixels()``, if the image mode is not L, an
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:py:exc:`Exception` was thrown. This has now been changed to a :py:exc:`ValueError`.
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API Additions
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=============
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ImageOps.contain
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^^^^^^^^^^^^^^^^
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Returns a resized version of the image, set to the maximum width and height within
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``size``, while maintaining the original aspect ratio.
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To compare it to other ImageOps methods:
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- :py:meth:`~PIL.ImageOps.fit` expands an image until is fills ``size``, cropping the
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parts of the image that do not fit.
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- :py:meth:`~PIL.ImageOps.pad` expands an image to fill ``size``, without cropping, but
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instead filling the extra space with ``color``.
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- :py:meth:`~PIL.ImageOps.contain` is similar to :py:meth:`~PIL.ImageOps.pad`, but it
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does not fill the extra space. Instead, the original aspect ratio is maintained. So
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unlike the other two methods, it is not guaranteed to return an image of ``size``.
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ICO saving: bitmap_format argument
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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By default, Pillow saves ICO files in the PNG format. They can now also be saved in BMP
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format, through the new ``bitmap_format`` argument::
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im.save("out.ico", bitmap_format="bmp")
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Security
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========
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TODO
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Other Changes
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=============
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Added DDS BC5 reading
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^^^^^^^^^^^^^^^^^^^^^
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Support has been added to read the BC5 format of DDS images, whether UNORM, SNORM or
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TYPELESS.
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