9.1.0

https://pillow.readthedocs.io/en/stable/releasenotes/9.1.0.html

Changes

• Add support for multiple component transformation to JPEG2000 #5500 [@scaramallion]
• Fix loading FriBiDi on Alpine #6165 [@nulano]
• Added setting for converting GIF P frames to RGB #6150 [@radarhere]
• Allow 1 mode images to be inverted #6034 [@radarhere]
• Raise ValueError when trying to save empty JPEG #6159 [@radarhere]
• Always save TIFF with contiguous planar configuration #5973 [@radarhere]
• Connected discontiguous polygon corners #5980 [@radarhere]
• Corrected memory allocation #5958 [@radarhere]
• Ensure Tkinter hook is activated for getimage() #6032 [@radarhere]
• Fixed comparison warnings #5970 [@radarhere]
• Use screencapture arguments to crop on macOS #6152 [@radarhere]
• Do not mark L mode JPEG as 1 bit in PDF #6151 [@radarhere]
• Fixed saving L mode GIF with background as WebP #6147 [@radarhere]
• Do not expand GIF during n_frames #6148 [@radarhere]
• Added support for reading I;16R TIFF images #6132 [@radarhere]
• If an error occurs after creating a file, remove the file #6134 [@radarhere]
• decode() should return -1 when finished #6130 [@radarhere]
• Fixed calling DisplayViewer or XVViewer without a title #6136 [@radarhere]
• Retain RGBA transparency when saving multiple GIF frames #6128 [@radarhere]
• Save additional ICO frames with other bit depths if supplied #6122 [@radarhere]
• Handle EXIF data truncated to just the header #6124 [@radarhere]
• Added support for reading BMP images with RLE8 compression #6102 [@radarhere]
• Support Python distributions where _tkinter is compiled in #6006 [@lukegb]
• Added WebP default duration of zero when saving #6140 [@radarhere]
• Added support for PPM arbitrary maxval #6119 [@radarhere]
• Removed unused variable #6137 [@radarhere]
• libwebp 1.2.2 fixed endian bugs #5984 [@radarhere]
• Added BigTIFF reading #6097 [@radarhere]
• GIF seek performance improvements #6077 [@radarhere]
• Removed load_prepare nearly identical to ImageFile load_prepare #6116 [@radarhere]
• When converting, clip I;16 to be unsigned, not signed #6112 [@radarhere]
• Check if self.im is not None #6108 [@radarhere]
• Fixed loading L mode GIF with transparency #6086 [@radarhere]
• Ensure cleanup() is called for PyEncoders #6096 [@radarhere]
• Various _accept changes #6092 [@radarhere]
• Improved handling of PPM header #5121 [@Piolie]
• Reset size when seeking away from "Large Thumbnail" MPO frame #6101 [@radarhere]
• Replace requirements.txt with extras #6072 [@hugovk]
• Added PyEncoder and support BLP saving #6069 [@radarhere]
• Handle TGA images with packets that cross scan lines #6087 [@radarhere]
• Added FITS reading #6056 [@radarhere]
• Added rawmode argument to Image.getpalette() #6061 [@radarhere]
• Fixed BUFR, GRIB and HDF5 stub saving #6071 [@radarhere]
• Changed quantize default dither to FLOYDSTEINBERG #6068 [@radarhere]
• Do not automatically remove temporary ImageShow files on Unix #6045 [@radarhere]
• Correctly read JPEG compressed BLP images #4685 [@Meithal]
• Merged _MODE_CONV typ into ImageMode as typestr #6057 [@radarhere]
• Consider palette size when converting and in getpalette() #6060 [@radarhere]
• Added enums #5954 [@radarhere]
• Ensure image is opaque after converting P to PA with RGB palette #6052 [@radarhere]
• Replaced absolute PIL import with relative import #6058 [@radarhere]
• Attach RGBA palettes from putpalette() when suitable #6054 [@radarhere]
• Simplified code #6053 [@radarhere]
• Clarify code and comments #6042 [@radarhere]
• Added get_photoshop_blocks() to parse Photoshop TIFF tag #6030 [@radarhere]
• Drop excess values in BITSPERSAMPLE #6041 [@mikhail-iurkov]
• Issue warning if Raqm layout is requested, but Raqm is not available #6035 [@nulano]
• Added unpacker from RGBA;15 to RGB #6031 [@radarhere]

Dependencies

• Updated freetype to 2.12 #6169 [@radarhere]
• Updated harfbuzz to 4.2.0 #6164 [@radarhere]
• Updated zlib to 1.2.12 #6160 [@radarhere]
• Updated harfbuzz to 4.1.0 #6153 [@radarhere]
• Updated harfbuzz to 4.0.1 #6125 [@radarhere]
• Updated harfbuzz to 4.0.0 #6104 [@radarhere]
• Updated harfbuzz to 3.4.0 #6048 [@radarhere]
• Updated lcms2 to 2.13.1 #6017 [@radarhere]
• Updated harfbuzz to 3.3.2 #6029 [@radarhere]
• Updated libimagequant to 4.0.0 #6014 [@radarhere]

Documentation

• Add musllinux wheels to 9.1.0 release notes #6168 [@hugovk]
• Document "keep" for JPEG save quality option #6135 [@carandraug]
• Document support for RLE8 reading in BMP #6155 [@radarhere]
• Removed period before colon #6143 [@radarhere]
• Added merging images example #6129 [@radarhere]
• decode() should return -1 when finished #6117 [@radarhere]
• Improved codec documentation #6094 [@radarhere]
• Document alternatives to accessing individual pixels #6099 [@radarhere]
• Document that histogram() uses 256 bins per channel #6106 [@radarhere]
• Added release notes for #6069 #6095 [@radarhere]
• Improved ImageShow documentation #6078 [@radarhere]
• Corrected docstring #6081 [@radarhere]
• Corrected JPEG subsampling documentation #6067 [@radarhere]
• Use --no-binary when installing from source #6066 [@radarhere]
• macOS: 'brew install openjpeg' for JPEG2000 support #6065 [@hugovk]
• Updated comment #6063 [@radarhere]
• Updated macOS tested Pillow versions #6038 [@radarhere]
• Fix return in docs #6040 [@hugovk]
• Corrected sentence #6016 [@radarhere]

Testing

• Added pytest-timeout to AppVeyor #6157 [@radarhere]
• Do not always require ctypes in tests #6141 [@radarhere]
• Updated setup-python, checkout and upload-artifact actions to v3 #6111 [@radarhere]
• pre-commit autoupdate --freeze #6109 [@radarhere]
• Updated Python for doccheck to 3.10 #6098 [@radarhere]
• Updated libjpeg-turbo to 2.1.3 #6091 [@radarhere]
• Enable heap verification without gflags #6089 [@radarhere]
• Test that n_frames and is_animated do not change GIF #6080 [@radarhere]
• Added Gentoo to Docker jobs #6088 [@radarhere]
• Removed duplicate test #6082 [@radarhere]
• Updated checks that no warnings were raised #6076 [@radarhere]
• Updated comment #6063 [@radarhere]
• Replaced test image to avoid copyrighted color space #6062 [@radarhere]
• Only skip test if libimagequant is earlier than 4 on ppc64le #6050 [@radarhere]
• Added CentOS Stream 9 #6036 [@radarhere]
• Upgraded AppVeyor Python 3.10 image to Visual Studio 2022 #6026 [@radarhere]