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Merge pull request #1992 from uploadcare/resize-rotation-release-notes

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Release notes for resize and rotation
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wiredfool 2016-06-30 12:24:08 +01:00 committed by GitHub
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docs/releasenotes/3.3.0.rst
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@ -10,6 +10,7 @@ platforms. This support requires building Pillow from source against
libimagequant. We cannot distribute binaries due to licensing libimagequant. We cannot distribute binaries due to licensing
differences. differences.
New Setup.py options New Setup.py options
==================== ====================
@ -24,6 +25,27 @@ There are two new options to control the ``build_ext`` task in ``setup.py``:
variables. variables.
Resizing
========
Image resampling for 8-bit per channel images was rewritten using only integer
computings. This is faster on most of the platforms and doesn't introduce
precision errors on the wide range of scales. With other performance
improvements, this makes resampling 60% faster on average.
Color calculation for images in the ``LA`` mode on semitransparent pixels
was fixed.
Rotation
========
Rotation for angles divisible by 90 degrees now always uses transposition.
This greately improve both quality and performance in this cases.
Also, the bug with wrong image size calculation when rotating by 90 degrees
was fixed.
Image Metadata Image Metadata
============== ==============