Added ImageOps cover method

Author: radarhere

Tests/test_imageops.py

@@ -39,6 +39,9 @@ def test_sanity():
     ImageOps.contain(hopper("L"), (128, 128))
     ImageOps.contain(hopper("RGB"), (128, 128))
 
+    ImageOps.cover(hopper("L"), (128, 128))
+    ImageOps.cover(hopper("RGB"), (128, 128))
+
     ImageOps.crop(hopper("L"), 1)
     ImageOps.crop(hopper("RGB"), 1)
 
@@ -119,6 +122,20 @@ def test_contain_round():
     assert new_im.height == 5
 
 
+@pytest.mark.parametrize(
+    "image_name, expected_size",
+    (
+        ("colr_bungee.png", (1024, 256)),  # landscape
+        ("imagedraw_stroke_multiline.png", (256, 640)),  # portrait
+        ("hopper.png", (256, 256)),  # square
+    ),
+)
+def test_cover(image_name, expected_size):
+    with Image.open("Tests/images/" + image_name) as im:
+        new_im = ImageOps.cover(im, (256, 256))
+        assert new_im.size == expected_size
+
+
 def test_pad():
     # Same ratio
     im = hopper()

docs/reference/ImageOps.rst

@@ -13,6 +13,7 @@ only work on L and RGB images.
 .. autofunction:: autocontrast
 .. autofunction:: colorize
 .. autofunction:: contain
+.. autofunction:: cover
 .. autofunction:: pad
 .. autofunction:: crop
 .. autofunction:: scale

src/PIL/ImageOps.py

@@ -242,7 +242,7 @@ def contain(image, size, method=Image.Resampling.BICUBIC):
     Returns a resized version of the image, set to the maximum width and height
     within the requested size, while maintaining the original aspect ratio.
 
-    :param image: The image to resize and crop.
+    :param image: The image to resize.
     :param size: The requested output size in pixels, given as a
                  (width, height) tuple.
     :param method: Resampling method to use. Default is
@@ -266,6 +266,35 @@ def contain(image, size, method=Image.Resampling.BICUBIC):
     return image.resize(size, resample=method)
 
 
+def cover(image, size, method=Image.Resampling.BICUBIC):
+    """
+    Returns a resized version of the image, set to at least the width and
+    height of the requested size, while maintaining the original aspect ratio.
+
+    :param image: The image to resize.
+    :param size: The requested output size in pixels, given as a
+                 (width, height) tuple.
+    :param method: Resampling method to use. Default is
+                   :py:attr:`~PIL.Image.Resampling.BICUBIC`.
+                   See :ref:`concept-filters`.
+    :return: An image.
+    """
+
+    im_ratio = image.width / image.height
+    dest_ratio = size[0] / size[1]
+
+    if im_ratio != dest_ratio:
+        if im_ratio < dest_ratio:
+            new_height = round(image.height / image.width * size[0])
+            if new_height != size[1]:
+                size = (size[0], new_height)
+        else:
+            new_width = round(image.width / image.height * size[1])
+            if new_width != size[0]:
+                size = (new_width, size[1])
+    return image.resize(size, resample=method)
+
+
 def pad(image, size, method=Image.Resampling.BICUBIC, color=None, centering=(0.5, 0.5)):
     """
     Returns a resized and padded version of the image, expanded to fill the