From 20e7a3d2d2a5faeadeda1898e2874c1b9221da15 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Thu, 5 Mar 2020 20:17:04 +1100
Subject: [PATCH] Document getbbox change for images with alpha [ci skip]

---
 docs/releasenotes/7.1.0.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/releasenotes/7.1.0.rst b/docs/releasenotes/7.1.0.rst
index f9639a636be..a9d8aa5b0d0 100644
--- a/docs/releasenotes/7.1.0.rst
+++ b/docs/releasenotes/7.1.0.rst
@@ -14,3 +14,12 @@ been resolved.
     from PIL import Image
     im = Image.open("hopper.jpg")
     im.save("out.jpg", quality=0)
+
+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.