Backport pillow antialias constant for version 10.0.0

Author: molinav

CHANGELOG.md

@@ -15,9 +15,12 @@ https://semver.org/spec/v2.0.0.html
 ### Changed
 - Upgrade `numpy` upper pin to 1.26.
 - Upgrade `pyproj` upper pin to 3.7.
+- Upgrade optional `pillow` upper pin to 10.1.0.
 - Upgrade documentation and linting dependencies.
 
 ### Fixed
+- Fix deprecated `Image.ANTIALIAS` with `Image.LANCZOS` when `pillow`
+  version is at least 10.0.0 (PR [#580], thanks to @cgohlke).
 - Downgrade upper pin for Cython requirement from 3.1 to 3.0 due to
   build error triggered by `_geoslib.pyx` (solves issue [#581]).
 - Downgrade lower pin for `numpy` to `>= 1.21` for Python >= 3.8, whose
@@ -972,6 +975,8 @@ https://semver.org/spec/v2.0.0.html
 
 [#581]:
 https://github.com/matplotlib/basemap/issues/581
+[#580]:
+https://github.com/matplotlib/basemap/pull/580
 [#573]:
 https://github.com/matplotlib/basemap/issues/573
 [#564]:

packages/basemap/requirements-test.txt

@@ -28,4 +28,4 @@ pillow >= 4.3.0, < 5.0.0; python_version == "3.3"
 pillow >= 5.4.0, < 6.0.0; python_version == "3.4"
 pillow >= 7.1.0, < 8.0.0; python_version == "3.5"
 pillow >= 8.3.2, < 9.0.0; python_version == "3.6"
-pillow >= 9.4.0, < 10.0.0; python_version >= "3.7"
+pillow >= 9.4.0, < 10.1.0; python_version >= "3.7"

packages/basemap/src/mpl_toolkits/basemap/__init__.py

@@ -4107,7 +4107,7 @@ def warpimage(self,image="bluemarble",scale=None,**kwargs):
                 w, h = pilImage.size
                 width = int(np.round(w*scale))
                 height = int(np.round(h*scale))
-                pilImage = pilImage.resize((width,height),Image.ANTIALIAS)
+                pilImage = pilImage.resize((width,height),Image.LANCZOS)
             if _matplotlib_version >= '1.2':
                 # orientation of arrays returned by pil_to_array
                 # changed (https://github.com/matplotlib/matplotlib/pull/616)