10.0.0 (2023-07-01)¶

Security¶

Limit size even if one dimension is zero¶

When performing decompression bomb checks, Pillow did not reject images with excessive width and zero height, or zero width and excessive height. That has now been fixed.

This effectively dates to the PIL fork, since problem images would still have been processed before Pillow started checking for decompression bombs.

CVE 2023-44271: Added ImageFont.MAX_STRING_LENGTH¶

To protect against potential DOS attacks when using arbitrary strings as text input, Pillow will now raise a ValueError if the number of characters passed into ImageFont methods is over a certain limit, PIL.ImageFont.MAX_STRING_LENGTH.

This threshold can be changed by setting PIL.ImageFont.MAX_STRING_LENGTH. It can be disabled by setting ImageFont.MAX_STRING_LENGTH = None.

Backwards Incompatible Changes¶

Categories¶

im.category has been removed, along with the related Image.NORMAL, Image.SEQUENCE and Image.CONTAINER attributes.

To determine if an image has multiple frames or not, getattr(im, "is_animated", False) can be used instead.

Tk/Tcl 8.4¶

Support for Tk/Tcl 8.4 has been removed.

JpegImagePlugin.convert_dict_qtables¶

Since deprecation in Pillow 8.3.0, the convert_dict_qtables method no longer performed any operations on the data given to it, and has been removed.

ImagePalette size parameter¶

Before Pillow 8.3.0, ImagePalette required palette data of particular lengths by default, and the size parameter could be used to override that. Pillow 8.3.0 removed the default required length, also removing the need for the size parameter.

ImageShow.Viewer.show_file file argument¶

The file argument in show_file() has been removed and replaced by path.

In effect, viewer.show_file("test.jpg") will continue to work unchanged.

Constants¶

A number of constants have been removed. Instead, enum.IntEnum classes have been added.

Removed	Use instead
`Image.LINEAR`	`Image.BILINEAR` or `Image.Resampling.BILINEAR`
`Image.CUBIC`	`Image.BICUBIC` or `Image.Resampling.BICUBIC`
`Image.ANTIALIAS`	`Image.LANCZOS` or `Image.Resampling.LANCZOS`
`ImageCms.INTENT_PERCEPTUAL`	`ImageCms.Intent.PERCEPTUAL`
`ImageCms.INTENT_RELATIVE_COLORMETRIC`	`ImageCms.Intent.RELATIVE_COLORMETRIC`
`ImageCms.INTENT_SATURATION`	`ImageCms.Intent.SATURATION`
`ImageCms.INTENT_ABSOLUTE_COLORIMETRIC`	`ImageCms.Intent.ABSOLUTE_COLORIMETRIC`
`ImageCms.DIRECTION_INPUT`	`ImageCms.Direction.INPUT`
`ImageCms.DIRECTION_OUTPUT`	`ImageCms.Direction.OUTPUT`
`ImageCms.DIRECTION_PROOF`	`ImageCms.Direction.PROOF`
`ImageFont.LAYOUT_BASIC`	`ImageFont.Layout.BASIC`
`ImageFont.LAYOUT_RAQM`	`ImageFont.Layout.RAQM`
`BlpImagePlugin.BLP_FORMAT_JPEG`	`BlpImagePlugin.Format.JPEG`
`BlpImagePlugin.BLP_ENCODING_UNCOMPRESSED`	`BlpImagePlugin.Encoding.UNCOMPRESSED`
`BlpImagePlugin.BLP_ENCODING_DXT`	`BlpImagePlugin.Encoding.DXT`
`BlpImagePlugin.BLP_ENCODING_UNCOMPRESSED_RAW_RGBA`	`BlpImagePlugin.Encoding.UNCOMPRESSED_RAW_RGBA`
`BlpImagePlugin.BLP_ALPHA_ENCODING_DXT1`	`BlpImagePlugin.AlphaEncoding.DXT1`
`BlpImagePlugin.BLP_ALPHA_ENCODING_DXT3`	`BlpImagePlugin.AlphaEncoding.DXT3`
`BlpImagePlugin.BLP_ALPHA_ENCODING_DXT5`	`BlpImagePlugin.AlphaEncoding.DXT5`
`FtexImagePlugin.FORMAT_DXT1`	`FtexImagePlugin.Format.DXT1`
`FtexImagePlugin.FORMAT_UNCOMPRESSED`	`FtexImagePlugin.Format.UNCOMPRESSED`
`PngImagePlugin.APNG_DISPOSE_OP_NONE`	`PngImagePlugin.Disposal.OP_NONE`
`PngImagePlugin.APNG_DISPOSE_OP_BACKGROUND`	`PngImagePlugin.Disposal.OP_BACKGROUND`
`PngImagePlugin.APNG_DISPOSE_OP_PREVIOUS`	`PngImagePlugin.Disposal.OP_PREVIOUS`
`PngImagePlugin.APNG_BLEND_OP_SOURCE`	`PngImagePlugin.Blend.OP_SOURCE`
`PngImagePlugin.APNG_BLEND_OP_OVER`	`PngImagePlugin.Blend.OP_OVER`

FitsStubImagePlugin¶

The stub image plugin FitsStubImagePlugin has been removed. FITS images can be read without a handler through FitsImagePlugin instead.

Font size and offset methods¶

Several functions for computing the size and offset of rendered text have been removed:

Removed	Use instead
`FreeTypeFont.getsize()` and `FreeTypeFont.getoffset()`	`FreeTypeFont.getbbox()` and `FreeTypeFont.getlength()`
`FreeTypeFont.getsize_multiline()`	`ImageDraw.multiline_textbbox()`
`ImageFont.getsize()`	`ImageFont.getbbox()` and `ImageFont.getlength()`
`TransposedFont.getsize()`	`TransposedFont.getbbox()` and `TransposedFont.getlength()`
`ImageDraw.textsize()` and `ImageDraw.multiline_textsize()`	`ImageDraw.textbbox()`, `ImageDraw.textlength()` and `ImageDraw.multiline_textbbox()`
`ImageDraw2.Draw.textsize()`	`ImageDraw2.Draw.textbbox()` and `ImageDraw2.Draw.textlength()`

FreeTypeFont.getmask2 fill parameter¶

The undocumented fill parameter of FreeTypeFont.getmask2() has been removed.

PhotoImage.paste box parameter¶

The box parameter was unused and has been removed.

PyQt5 and PySide2¶

Qt 5 reached end-of-life on 2020-12-08 for open-source users (and will reach EOL on 2023-12-08 for commercial licence holders).

Support for PyQt5 and PySide2 has been removed from ImageQt. Upgrade to PyQt6 or PySide6 instead.

Image.coerce_e¶

This undocumented method has been removed.

Deprecations¶

PyAccess and Image.USE_CFFI_ACCESS¶

Since Pillow’s C API is now faster than PyAccess on PyPy, PyAccess has been deprecated and will be removed in Pillow 11.0.0 (2024-10-15). Pillow’s C API will now be used by default on PyPy instead.

Image.USE_CFFI_ACCESS, for switching from the C API to PyAccess, is similarly deprecated.

API Changes¶

Added line width parameter to ImageDraw regular_polygon¶

An optional line width parameter has been added to ImageDraw.Draw.regular_polygon.

API Additions¶

Added `alpha_only` argument to `getbbox()`¶

getbbox() now accepts a keyword argument of alpha_only. This is an optional flag, defaulting to True. If True and the image has an alpha channel, trim transparent pixels. Otherwise, trim pixels when all channels are zero.

Other Changes¶

32-bit wheels¶

32-bit wheels are no longer provided.

Support display_jpeg() in IPython¶

In addition to display() and display_png, display_jpeg() can now also be used to display images in IPython:

from PIL import Image
from IPython.display import display_jpeg

im = Image.new("RGB", (100, 100), (255, 0, 0))
display_jpeg(im)

Support reading signed 8-bit TIFF images¶

TIFF images with signed integer data, 8 bits per sample and a photometric interpretation of BlackIsZero can now be read.