Merge pull request #202 from alexei/fix-pil_antialias

fix: use `Image.Resampling.LANCZOS` instead of `Image.ANTIALIAS` when available
respondcreate · Jan 21, 2024 · 0164830 · 0164830
2 parents f177150 + 2a7ff34
commit 0164830
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Showing 2 changed files with 10 additions and 4 deletions.
diff --git a/docs/writing_custom_sizers_and_filters.rst b/docs/writing_custom_sizers_and_filters.rst
@@ -77,7 +77,7 @@ For an example, let's take a look at the ``thumbnail`` Sizer (``versatileimagefi
             imagefile = BytesIO()
             image.thumbnail(
                 (width, height),
-                Image.ANTIALIAS
+                Image.Resampling.LANCZOS
             )
             image.save(
                 imagefile,
@@ -311,7 +311,7 @@ is registered (see the highlighted lines in the following code block for the rel
             imagefile = BytesIO()
             image.thumbnail(
                 (width, height),
-                Image.ANTIALIAS
+                Image.Resampling.LANCZOS
             )
             image.save(
                 imagefile,

diff --git a/versatileimagefield/versatileimagefield.py b/versatileimagefield/versatileimagefield.py
@@ -7,6 +7,12 @@
 from .registry import versatileimagefield_registry
 
 
+try:
+    ANTIALIAS = Image.Resampling.LANCZOS
+except AttributeError:
+    ANTIALIAS = Image.ANTIALIAS  # deprecated in 9.1.0 and removed in 10.0.0
+
+
 class CroppedImage(SizedImage):
     """
     A SizedImage subclass that creates a 'cropped' image.
@@ -115,7 +121,7 @@ def crop_on_centerpoint(self, image, width, height, ppoi=(0.5, 0.5)):
         # (as determined by `width`x`height`)
         return cropped_image.resize(
             (width, height),
-            Image.ANTIALIAS
+            ANTIALIAS
         )
 
     def process_image(self, image, image_format, save_kwargs,
@@ -168,7 +174,7 @@ def process_image(self, image, image_format, save_kwargs,
         imagefile = BytesIO()
         image.thumbnail(
             (width, height),
-            Image.ANTIALIAS
+            ANTIALIAS
         )
         image.save(
             imagefile,