quantization is now automatically converted, but still returned as a
convert_dict_qtables method no longer
performs any operations on the data given to it, has been deprecated and will be
removed in Pillow 10.0.0 (2023-01-02).
Changed WebP default “method” value when saving¶
Previously, it was 0, for the best speed. The default has now been changed to 4, to match WebP’s default, for higher quality with still some speed optimisation.
Default resampling filter for special image modes¶
Pillow 7.0 changed the default resampling filter to
Image.BICUBIC. However, as this
is not supported yet for images with a custom number of bits, the default filter for
those modes has been reverted to
ImageMorph incorrect mode errors¶
XMP data can now be
returned for PNG and TIFF images, through
getxmp() for each format.
The returned dictionary will start from the base of the XML, meaning that the top level
should contain an “xmpmeta” key. JPEG’s
getxmp() method has also been updated to
Returns a resized version of the image, set to the maximum width and height within
size, while maintaining the original aspect ratio.
To compare it to other ImageOps methods:
fit()expands an image until is fills
size, cropping the parts of the image that do not fit.
pad()expands an image to fill
size, without cropping, but instead filling the extra space with
contain()is similar to
pad(), but it does not fill the extra space. Instead, the original aspect ratio is maintained. So unlike the other two methods, it is not guaranteed to return an image of
ICO saving: bitmap_format argument¶
By default, Pillow saves ICO files in the PNG format. They can now also be saved in BMP
format, through the new
This release addresses CVE-2021-34552. PIL since 1.1.4 and Pillow since 1.0 allowed parameters passed into a convert function to trigger buffer overflow in Convert.c.
Pillow previously parsed XMP data using Python’s
xml module. However, this module
is not secure.
Added DDS BC5 reading and uncompressed saving¶
Support has been added to read the BC5 format of DDS images, whether UNORM, SNORM or TYPELESS.
Support has also been added to write the uncompressed format of DDS images.