Added inPlace argument to exif_transpose()

Tests/test_imageops.py

@@ -404,6 +404,18 @@ def test_exif_transpose():
     assert 0x0112 not in transposed_im.getexif()
 
 
+def test_exif_transpose_inplace():
+    with Image.open("Tests/images/orientation_rectangle.jpg") as im:
+        assert im.size == (2, 1)
+        assert im.getexif()[0x0112] == 8
+        expected = im.rotate(90, expand=True)
+
+        ImageOps.exif_transpose(im, inPlace=True)
+        assert im.size == (1, 2)
+        assert 0x0112 not in im.getexif()
+        assert_image_equal(im, expected)
+
+
 def test_autocontrast_cutoff():
     # Test the cutoff argument of autocontrast
     with Image.open("Tests/images/bw_gradient.png") as img:

src/PIL/ImageOps.py

@@ -576,19 +576,20 @@ def solarize(image, threshold=128):
     return _lut(image, lut)
 
 
-def exif_transpose(image):
+def exif_transpose(image, inPlace=False):
     """
-    If an image has an EXIF Orientation tag, other than 1, return a new image
-    that is transposed accordingly. The new image will have the orientation
-    data removed.
-
-    Otherwise, return a copy of the image.
+    If an image has an EXIF Orientation tag, other than 1, transpose the image
+    accordingly, and remove the orientation data.
 
     :param image: The image to transpose.
-    :return: An image.
+    :param inPlace: Boolean.
+        If ``True``, the original image is modified in-place, and ``None`` is returned.
+        If ``False`` (default), a new :py:class:`~PIL.Image.Image` object is returned
+        with the transposition applied. If there is no transposition, a copy of the
+        image will be returned.
     """
-    exif = image.getexif()
-    orientation = exif.get(0x0112)
+    image_exif = image.getexif()
+    orientation = image_exif.get(0x0112)
     method = {
         2: Image.Transpose.FLIP_LEFT_RIGHT,
         3: Image.Transpose.ROTATE_180,
@@ -600,22 +601,30 @@ def exif_transpose(image):
     }.get(orientation)
     if method is not None:
         transposed_image = image.transpose(method)
-        transposed_exif = transposed_image.getexif()
-        if 0x0112 in transposed_exif:
-            del transposed_exif[0x0112]
-            if "exif" in transposed_image.info:
-                transposed_image.info["exif"] = transposed_exif.tobytes()
-            elif "Raw profile type exif" in transposed_image.info:
-                transposed_image.info[
-                    "Raw profile type exif"
-                ] = transposed_exif.tobytes().hex()
-            elif "XML:com.adobe.xmp" in transposed_image.info:
+        if inPlace:
+            image.im = transposed_image.im
+            image.pyaccess = None
+            image._size = transposed_image._size
+        exif_image = image if inPlace else transposed_image
+
+        exif = exif_image.getexif()
+        if 0x0112 in exif:
+            del exif[0x0112]
+            if "exif" in exif_image.info:
+                exif_image.info["exif"] = exif.tobytes()
+            elif "Raw profile type exif" in exif_image.info:
+                exif_image.info["Raw profile type exif"] = exif.tobytes().hex()
+            elif "XML:com.adobe.xmp" in exif_image.info:
                 for pattern in (
                     r'tiff:Orientation="([0-9])"',
                     r"<tiff:Orientation>([0-9])</tiff:Orientation>",
                 ):
-                    transposed_image.info["XML:com.adobe.xmp"] = re.sub(
-                        pattern, "", transposed_image.info["XML:com.adobe.xmp"]
+                    exif_image.info["XML:com.adobe.xmp"] = re.sub(
+                        pattern, "", exif_image.info["XML:com.adobe.xmp"]
                     )
+        if inPlace:
+            return
         return transposed_image
+    if inPlace:
+        return
     return image.copy()