Load pillow_heif if available

pyproject.toml

@@ -32,7 +32,7 @@ dependencies = [
 dynamic = ["version"]
 
 [project.optional-dependencies]
-all = ["brotli", "feedgenerator", "zopfli", "cryptography"]
+all = ["brotli", "feedgenerator", "zopfli", "cryptography", "pillow-heif"]
 tests = ["pytest", "pytest-cov"]
 docs = ["Sphinx>=4.1.0", "furo", "cryptography"]
 

src/sigal/image.py

@@ -44,6 +44,11 @@ from PIL.TiffImagePlugin import IFDRational
 from pilkit.processors import Transpose
 from pilkit.utils import save_image
 
+try:
+    from pillow_heif import HeifImagePlugin
+except:
+    pass
+
 from . import signals, utils
 
 # Force loading of truncated files