From 26f6d8f076e6645b47f85034bbaa4319565405f7 Mon Sep 17 00:00:00 2001
From: Jeff <138259519+jdotc1@users.noreply.github.com>
Date: Wed, 21 Oct 2026 14:43:29 -0400
Subject: [PATCH 1/2] Handle zero-width images in ImageOps.cover

---
 Tests/test_imageops.py       | 22 ++++++++++++++++++++++
 docs/releasenotes/13.1.0.rst |  7 +++++++
 src/PIL/ImageOps.py          |  2 ++
 3 files changed, 31 insertions(+)

diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index c40213476f3..8342fc82099 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -202,6 +202,28 @@ def test_cover_zero() -> None:
     assert new_im.size == (0, 0)
 
 
+@pytest.mark.parametrize("mode", ("1", "L", "RGB", "RGBA"))
+@pytest.mark.parametrize(
+    "source_size, target_size, expected_size",
+    [
+        ((0, 10), (5, 5), (0, 5)),
+        ((0, 10), (3, 7), (0, 7)),
+        ((0, 10), (3, 0), (0, 0)),
+        ((0, 0), (3, 7), (3, 0)),
+    ],
+)
+def test_cover_zero_width(
+    mode: str,
+    source_size: tuple[int, int],
+    target_size: tuple[int, int],
+    expected_size: tuple[int, int],
+) -> None:
+    im = Image.new(mode, source_size)
+    result = ImageOps.cover(im, target_size)
+    assert result.size == expected_size
+    assert result.mode == mode
+
+
 def test_pad() -> None:
     # Same ratio
     im = hopper()
diff --git a/docs/releasenotes/13.1.0.rst b/docs/releasenotes/13.1.0.rst
index 140bcbe3115..dd8830c6a4c 100644
--- a/docs/releasenotes/13.1.0.rst
+++ b/docs/releasenotes/13.1.0.rst
@@ -49,6 +49,13 @@ TODO
 Other changes
 =============
 
+Covering zero-width images
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+:py:func:`~PIL.ImageOps.cover` now handles a zero-width image with nonzero height
+by returning an image with zero width and the requested height, instead of
+raising :py:exc:`ZeroDivisionError`.
+
 Blurring I;16 images
 ^^^^^^^^^^^^^^^^^^^^
 
diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
index 364bcc90911..5d44cb72ae3 100644
--- a/src/PIL/ImageOps.py
+++ b/src/PIL/ImageOps.py
@@ -351,6 +351,8 @@ def cover(
 
     if image.height == 0:
         return Image.new(image.mode, (size[0], 0))
+    if image.width == 0:
+        return Image.new(image.mode, (0, size[1]))
     im_ratio = image.width / image.height
     if size[1] == 0:
         return Image.new(image.mode, (0, 0))

From 16c2cc742bca5ec7033394d30a5c48b7ba000366 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Thu, 22 Oct 2026 09:58:24 +1100
Subject: [PATCH 2/2] Simplify tests

---
 Tests/test_imageops.py       | 26 ++++----------------------
 docs/releasenotes/13.1.0.rst |  7 -------
 src/PIL/ImageOps.py          |  4 ++--
 3 files changed, 6 insertions(+), 31 deletions(-)

diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index 8342fc82099..c52d3420e8f 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -193,6 +193,10 @@ def test_cover(image_name: str, expected_size: tuple[int, int]) -> None:
 
 
 def test_cover_zero() -> None:
+    im = Image.new("1", (0, 10))
+    new_im = ImageOps.cover(im, (5, 5))
+    assert new_im.size == (0, 5)
+
     im = Image.new("1", (10, 0))
     new_im = ImageOps.cover(im, (5, 5))
     assert new_im.size == (5, 0)
@@ -202,28 +206,6 @@ def test_cover_zero() -> None:
     assert new_im.size == (0, 0)
 
 
-@pytest.mark.parametrize("mode", ("1", "L", "RGB", "RGBA"))
-@pytest.mark.parametrize(
-    "source_size, target_size, expected_size",
-    [
-        ((0, 10), (5, 5), (0, 5)),
-        ((0, 10), (3, 7), (0, 7)),
-        ((0, 10), (3, 0), (0, 0)),
-        ((0, 0), (3, 7), (3, 0)),
-    ],
-)
-def test_cover_zero_width(
-    mode: str,
-    source_size: tuple[int, int],
-    target_size: tuple[int, int],
-    expected_size: tuple[int, int],
-) -> None:
-    im = Image.new(mode, source_size)
-    result = ImageOps.cover(im, target_size)
-    assert result.size == expected_size
-    assert result.mode == mode
-
-
 def test_pad() -> None:
     # Same ratio
     im = hopper()
diff --git a/docs/releasenotes/13.1.0.rst b/docs/releasenotes/13.1.0.rst
index dd8830c6a4c..140bcbe3115 100644
--- a/docs/releasenotes/13.1.0.rst
+++ b/docs/releasenotes/13.1.0.rst
@@ -49,13 +49,6 @@ TODO
 Other changes
 =============
 
-Covering zero-width images
-^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-:py:func:`~PIL.ImageOps.cover` now handles a zero-width image with nonzero height
-by returning an image with zero width and the requested height, instead of
-raising :py:exc:`ZeroDivisionError`.
-
 Blurring I;16 images
 ^^^^^^^^^^^^^^^^^^^^
 
diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
index 5d44cb72ae3..b40af6330bb 100644
--- a/src/PIL/ImageOps.py
+++ b/src/PIL/ImageOps.py
@@ -349,10 +349,10 @@ def cover(
     :return: An image.
     """
 
-    if image.height == 0:
-        return Image.new(image.mode, (size[0], 0))
     if image.width == 0:
         return Image.new(image.mode, (0, size[1]))
+    if image.height == 0:
+        return Image.new(image.mode, (size[0], 0))
     im_ratio = image.width / image.height
     if size[1] == 0:
         return Image.new(image.mode, (0, 0))