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4.2.0

Added Complex Text Rendering

Pillow now supports complex text rendering for scripts requiring glyph composition and bidirectional flow. This optional feature adds three dependencies: harfbuzz, fribidi, and raqm. See the :doc:`install documentation <../installation>` for further details. This feature is tested and works on Unix and Mac, but has not yet been built on Windows platforms.

New Optional Parameters

  • :py:meth:`PIL.ImageDraw.floodfill` has a new optional parameter: threshold. This specifies a tolerance for the color to replace with the flood fill.
  • The TIFF and PDF image writers now support the append_images optional parameter for specifying additional images to create multipage outputs.

New DecompressionBomb Warning

:py:meth:`PIL.Image.Image.crop` now may raise a DecompressionBomb warning if the crop region enlarges the image over the threshold specified by :py:data:`PIL.Image.MAX_IMAGE_PIXELS`.

Removed Deprecated Items

Several deprecated items have been removed.

  • The methods PIL.ImageWin.Dib.fromstring, PIL.ImageWin.Dib.tostring and PIL.TiffImagePlugin.ImageFileDirectory_v2.as_dict have been removed.
  • Before Pillow 4.2.0, attempting to save an RGBA image as JPEG would discard the alpha channel. From Pillow 3.4.0, a deprecation warning was shown. From Pillow 4.2.0, the deprecation warning is removed and an :py:exc:`IOError` is raised.

Removed Core Image Function

The unused function Image.core.new_array was removed. This is an internal function that should not have been used by user code, but it was accessible from the python layer.