From c68c508e27935f31ffa357e7e3bc7763cbe461e5 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Wed, 10 May 2023 13:25:35 +1000
Subject: [PATCH] Fixed joined corners for odd dimensions

---
 .../images/imagedraw_rounded_rectangle_x_odd.png  | Bin 0 -> 565 bytes
 .../images/imagedraw_rounded_rectangle_y_odd.png  | Bin 0 -> 527 bytes
 Tests/test_imagedraw.py                           |   2 ++
 src/PIL/ImageDraw.py                              |   4 ++--
 4 files changed, 4 insertions(+), 2 deletions(-)
 create mode 100644 Tests/images/imagedraw_rounded_rectangle_x_odd.png
 create mode 100644 Tests/images/imagedraw_rounded_rectangle_y_odd.png

diff --git a/Tests/images/imagedraw_rounded_rectangle_x_odd.png b/Tests/images/imagedraw_rounded_rectangle_x_odd.png
new file mode 100644
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diff --git a/Tests/images/imagedraw_rounded_rectangle_y_odd.png b/Tests/images/imagedraw_rounded_rectangle_y_odd.png
new file mode 100644
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diff --git a/Tests/test_imagedraw.py b/Tests/test_imagedraw.py
index e8a0403a5..7497fdc66 100644
--- a/Tests/test_imagedraw.py
+++ b/Tests/test_imagedraw.py
@@ -839,7 +839,9 @@ def test_rounded_rectangle_zero_radius(bbox):
     "xy, suffix",
     [
         ((20, 10, 80, 90), "x"),
+        ((20, 10, 81, 90), "x_odd"),
         ((10, 20, 90, 80), "y"),
+        ((10, 20, 90, 81), "y_odd"),
         ((20, 20, 80, 80), "both"),
     ],
 )
diff --git a/src/PIL/ImageDraw.py b/src/PIL/ImageDraw.py
index 1e4eeab25..7d1790faa 100644
--- a/src/PIL/ImageDraw.py
+++ b/src/PIL/ImageDraw.py
@@ -314,11 +314,11 @@ class ImageDraw:
 
         full_x, full_y = False, False
         if all(corners):
-            full_x = d >= x1 - x0
+            full_x = d >= x1 - x0 - 1
             if full_x:
                 # The two left and two right corners are joined
                 d = x1 - x0
-            full_y = d >= y1 - y0
+            full_y = d >= y1 - y0 - 1
             if full_y:
                 # The two top and two bottom corners are joined
                 d = y1 - y0