From ca3bc290e326e520f029882214ca17b874a68dcb Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Fri, 18 Mar 2022 19:57:24 +1100
Subject: [PATCH 1/2] Record resolution instead of requiring ctypes

---
 Tests/test_file_libtiff.py | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
index a9337f4fc65..d83c584b5da 100644
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@@ -4,7 +4,6 @@
 import os
 import re
 from collections import namedtuple
-from ctypes import c_float
 
 import pytest
 
@@ -168,14 +167,11 @@ def test_write_metadata(self, tmp_path):
                     val = original[tag]
                     if tag.endswith("Resolution"):
                         if legacy_api:
-                            assert (
-                                c_float(val[0][0] / val[0][1]).value
-                                == c_float(value[0][0] / value[0][1]).value
+                            assert val[0][0] / val[0][1] == (
+                                4294967295 / 113653537
                             ), f"{tag} didn't roundtrip"
                         else:
-                            assert (
-                                c_float(val).value == c_float(value).value
-                            ), f"{tag} didn't roundtrip"
+                            assert val == 37.79000115940079, f"{tag} didn't roundtrip"
                     else:
                         assert val == value, f"{tag} didn't roundtrip"
 

From 2a285d1b1f81d68276c18b0f3fdd6950fb715fec Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 19 Mar 2022 14:46:25 +1100
Subject: [PATCH 2/2] Only import ctypes as needed on Windows

---
 Tests/test_image_access.py      | 3 ++-
 Tests/test_imagewin_pointers.py | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Tests/test_image_access.py b/Tests/test_image_access.py
index 5bca0858256..617274a576d 100644
--- a/Tests/test_image_access.py
+++ b/Tests/test_image_access.py
@@ -1,4 +1,3 @@
-import ctypes
 import os
 import subprocess
 import sys
@@ -404,6 +403,8 @@ class TestEmbeddable:
         "not from shell",
     )
     def test_embeddable(self):
+        import ctypes
+
         with open("embed_pil.c", "w") as fh:
             fh.write(
                 """
diff --git a/Tests/test_imagewin_pointers.py b/Tests/test_imagewin_pointers.py
index c51a66089c8..df130565575 100644
--- a/Tests/test_imagewin_pointers.py
+++ b/Tests/test_imagewin_pointers.py
@@ -1,4 +1,3 @@
-import ctypes
 from io import BytesIO
 
 from PIL import Image, ImageWin
@@ -8,6 +7,7 @@
 # see https://github.com/python-pillow/Pillow/pull/1431#issuecomment-144692652
 
 if is_win32():
+    import ctypes
     import ctypes.wintypes
 
     class BITMAPFILEHEADER(ctypes.Structure):