Clear PPM half token after use¶

Image files that are small on disk are often prevented from expanding to bebig images consuming a large amount of resources simply because they lack thedata to populate those resources.

PpmImagePlugin might hold onto the last data read for a pixel value in case thepixel value has not been finished yet. However, that data was not being clearedafterwards, meaning that infinite data could be available to fill any imagesize. This has been present since Pillow 9.2.0.

That data is now cleared after use.

Saving TIFF tag ImageSourceData¶

If Pillow incorrectly saved the TIFF tag ImageSourceData as ASCII instead ofUNDEFINED, a segmentation fault was triggered.

The correct tag type will now be used by default instead.

PSFile¶

ThePSFile class has been deprecated and willbe removed in Pillow 11 (2024-10-15). This class was only made as a helper tobe used internally, so there is no replacement. If you need this functionalitythough, it is a very short class that can easily be recreated in your own code.

QOI file format¶

Pillow can now read images in Quite OK Image format.

Addeddpi argument when saving PDFs¶

When saving a PDF, resolution could already be specified using theresolution argument. Now, a tuple of(x_resolution,y_resolution) canbe provided asdpi. If both are provided,dpi will overrideresolution.

Addedcorners argument toImageDraw.rounded_rectangle()¶

ImageDraw.rounded_rectangle() now accepts a keyword argument ofcorners. This a tuple of Booleans, specifying whether to round each corner,(top_left,top_right,bottom_right,bottom_left).

JPEG2000 comments and PLT marker¶

When opening a JPEG2000 image, the comment may now be read intoinfo. Thecomment keyword argument can be usedto save it back again.

If OpenJPEG 2.4.0 or later is available and theplt keyword argumentis present and true when saving JPEG2000 images, tell the encoder to generatePLT markers.

Added support for saving PDFs in RGBA mode¶

Using the JPXDecode filter, PDFs can now be saved in RGBA mode.

Improved I;16N support¶

Support has been added for I;16N access, packing and unpacking. Conversion toand from L mode has also been added.

BGR;* modes¶

It is now possible to create new BGR;15, BGR;16 and BGR;24 images. Conversely, BGR;32has been removed from ImageMode and its associated methods, dropping the little supportPillow had for the mode.

With that, all modes listed underModes can now be used to create a newimage.