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Document getbbox change for images with alpha [ci skip]

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Andrew Murray 2020-03-05 21:25:39 +11:00
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docs/releasenotes/7.1.0.rst
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7.0.0 7.0.0
----- -----
API Changes
===========
Allow saving of zero quality JPEG images Allow saving of zero quality JPEG images
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -14,3 +17,15 @@ been resolved.
from PIL import Image from PIL import Image
im = Image.open("hopper.jpg") im = Image.open("hopper.jpg")
im.save("out.jpg", quality=0) im.save("out.jpg", quality=0)
Other Changes
=============
If present, only use alpha channel for bounding box
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
When the :py:meth:`~PIL.Image.Image.getbbox` method calculates the bounding
box, for an RGB image it trims black pixels. Similarly, for an RGBA image it
would trim black transparent pixels. This is now changed so that if an image
has an alpha channel (RGBA, RGBa, PA, LA, La), any transparent pixels are
trimmed.