Merge branch 'main' into load_default_imagefont

.appveyor.yml

@@ -32,10 +32,10 @@ install:
 - curl -fsSL -o pillow-test-images.zip https://github.com/python-pillow/test-images/archive/main.zip
 - 7z x pillow-test-images.zip -oc:\
 - xcopy /S /Y c:\test-images-main\* c:\pillow\tests\images
-- curl -fsSL -o nasm-win64.zip https://raw.githubusercontent.com/python-pillow/pillow-depends/main/nasm-2.16.01-win64.zip
+- curl -fsSL -o nasm-win64.zip https://raw.githubusercontent.com/python-pillow/pillow-depends/main/nasm-2.16.03-win64.zip
 - 7z x nasm-win64.zip -oc:\
-- choco install ghostscript --version=10.3.0
-- path c:\nasm-2.16.01;C:\Program Files\gs\gs10.00.0\bin;%PATH%
+- choco install ghostscript --version=10.3.1
+- path c:\nasm-2.16.03;C:\Program Files\gs\gs10.03.1\bin;%PATH%
 - cd c:\pillow\winbuild\
 - ps: |
         c:\python38\python.exe c:\pillow\winbuild\build_prepare.py -v --depends=C:\pillow-depends\

.ci/requirements-cibw.txt

@@ -1 +1 @@
-cibuildwheel==2.18.1
+cibuildwheel==2.19.1

.github/workflows/macos-install.sh

@@ -7,11 +7,15 @@ brew install \
     ghostscript \
     libimagequant \
     libjpeg \
-    libraqm \
     libtiff \
     little-cms2 \
     openjpeg \
     webp
+if [[ "$ImageOS" == "macos13" ]]; then
+    brew install --ignore-dependencies libraqm
+else
+    brew install libraqm
+fi
 export PKG_CONFIG_PATH="/usr/local/opt/openblas/lib/pkgconfig"
 
 # TODO Update condition when cffi supports 3.13

.github/workflows/test-windows.yml

@@ -86,7 +86,7 @@ jobs:
         choco install nasm --no-progress
         echo "C:\Program Files\NASM" >> $env:GITHUB_PATH
 
-        choco install ghostscript --version=10.3.0 --no-progress
+        choco install ghostscript --version=10.3.1 --no-progress
         echo "C:\Program Files\gs\gs10.00.0\bin" >> $env:GITHUB_PATH
 
         # Install extra test images

.github/workflows/wheels-dependencies.sh

@@ -16,9 +16,9 @@ ARCHIVE_SDIR=pillow-depends-main
 
 # Package versions for fresh source builds
 FREETYPE_VERSION=2.13.2
-HARFBUZZ_VERSION=8.4.0
+HARFBUZZ_VERSION=8.5.0
 LIBPNG_VERSION=1.6.43
-JPEGTURBO_VERSION=3.0.2
+JPEGTURBO_VERSION=3.0.3
 OPENJPEG_VERSION=2.5.2
 XZ_VERSION=5.4.5
 TIFF_VERSION=4.6.0
@@ -33,9 +33,9 @@ if [[ -n "$IS_MACOS" ]] || [[ "$MB_ML_VER" != 2014 ]]; then
 else
     ZLIB_VERSION=1.2.8
 fi
-LIBWEBP_VERSION=1.3.2
+LIBWEBP_VERSION=1.4.0
 BZIP2_VERSION=1.0.8
-LIBXCB_VERSION=1.16.1
+LIBXCB_VERSION=1.17.0
 BROTLI_VERSION=1.1.0
 
 if [[ -n "$IS_MACOS" ]] && [[ "$CIBW_ARCHS" == "x86_64" ]]; then
@@ -70,7 +70,7 @@ function build {
     fi
     build_new_zlib
 
-    build_simple xcb-proto 1.16.0 https://xorg.freedesktop.org/archive/individual/proto
+    build_simple xcb-proto 1.17.0 https://xorg.freedesktop.org/archive/individual/proto
     if [ -n "$IS_MACOS" ]; then
         build_simple xorgproto 2024.1 https://www.x.org/pub/individual/proto
         build_simple libXau 1.0.11 https://www.x.org/pub/individual/lib

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.4.3
+    rev: v0.4.7
     hooks:
       - id: ruff
         args: [--exit-non-zero-on-fix]
@@ -24,7 +24,7 @@ repos:
         exclude: (Makefile$|\.bat$|\.cmake$|\.eps$|\.fits$|\.gd$|\.opt$)
 
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v18.1.4
+    rev: v18.1.5
     hooks:
       - id: clang-format
         types: [c]
@@ -50,7 +50,7 @@ repos:
         exclude: ^.github/.*TEMPLATE|^Tests/(fonts|images)/
 
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.28.2
+    rev: 0.28.4
     hooks:
       - id: check-github-workflows
       - id: check-readthedocs
@@ -67,7 +67,7 @@ repos:
       - id: pyproject-fmt
 
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.16
+    rev: v0.18
     hooks:
       - id: validate-pyproject
 

.readthedocs.yml

@@ -3,7 +3,7 @@ version: 2
 formats: [pdf]
 
 build:
-  os: ubuntu-22.04
+  os: ubuntu-lts-latest
   tools:
     python: "3"
   jobs:

CHANGES.rst

@@ -5,6 +5,30 @@ Changelog (Pillow)
 10.4.0 (unreleased)
 -------------------
 
+- Support unpacking more rawmodes to RGBA palettes #7966
+  [radarhere]
+
+- Removed support for Qt 5 #8159
+  [radarhere]
+
+- Improve ``ImageFont.freetype`` support for XDG directories on Linux #8135
+  [mamg22, radarhere]
+
+- Improved consistency of XMP handling #8069
+  [radarhere]
+
+- Use pkg-config to help find libwebp and raqm #8142
+  [radarhere]
+
+- Accept 't' suffix for libtiff version #8126, #8129
+  [radarhere]
+
+- Deprecate ImageDraw.getdraw hints parameter #8124
+  [radarhere, hugovk]
+
+- Added ImageDraw circle() #8085
+  [void4, hugovk, radarhere]
+
 - Add mypy target to Makefile #8077
   [Yay295]
 

Tests/bench_cffi_access.py

@@ -44,6 +44,7 @@ def test_direct() -> None:
     caccess = im.im.pixel_access(False)
     access = PyAccess.new(im, False)
 
+    assert access is not None
     assert caccess[(0, 0)] == access[(0, 0)]
 
     print(f"Size: {im.width}x{im.height}")

Tests/helper.py

@@ -18,7 +18,7 @@ from typing import Any, Callable, Sequence
 import pytest
 from packaging.version import parse as parse_version
 
-from PIL import Image, ImageMath, features
+from PIL import Image, ImageFile, ImageMath, features
 
 logger = logging.getLogger(__name__)
 
@@ -174,12 +174,13 @@ def skip_unless_feature(feature: str) -> pytest.MarkDecorator:
 def skip_unless_feature_version(
     feature: str, required: str, reason: str | None = None
 ) -> pytest.MarkDecorator:
-    if not features.check(feature):
+    version = features.version(feature)
+    if version is None:
         return pytest.mark.skip(f"{feature} not available")
     if reason is None:
         reason = f"{feature} is older than {required}"
     version_required = parse_version(required)
-    version_available = parse_version(features.version(feature))
+    version_available = parse_version(version)
     return pytest.mark.skipif(version_available < version_required, reason=reason)
 
 
@@ -189,12 +190,13 @@ def mark_if_feature_version(
     version_blacklist: str,
     reason: str | None = None,
 ) -> pytest.MarkDecorator:
-    if not features.check(feature):
+    version = features.version(feature)
+    if version is None:
         return pytest.mark.pil_noop_mark()
     if reason is None:
         reason = f"{feature} is {version_blacklist}"
     version_required = parse_version(version_blacklist)
-    version_available = parse_version(features.version(feature))
+    version_available = parse_version(version)
     if (
         version_available.major == version_required.major
         and version_available.minor == version_required.minor
@@ -220,16 +222,11 @@ class PillowLeakTestCase:
         from resource import RUSAGE_SELF, getrusage
 
         mem = getrusage(RUSAGE_SELF).ru_maxrss
-        if sys.platform == "darwin":
-            # man 2 getrusage:
-            #     ru_maxrss
-            # This is the maximum resident set size utilized (in bytes).
-            return mem / 1024  # Kb
-        # linux
-        # man 2 getrusage
-        #        ru_maxrss (since Linux 2.6.32)
-        #  This is the maximum resident set size used (in kilobytes).
-        return mem  # Kb
+        # man 2 getrusage:
+        #     ru_maxrss
+        # This is the maximum resident set size utilized
+        # in bytes on macOS, in kilobytes on Linux
+        return mem / 1024 if sys.platform == "darwin" else mem
 
     def _test_leak(self, core: Callable[[], None]) -> None:
         start_mem = self._get_mem_usage()
@@ -243,7 +240,7 @@ class PillowLeakTestCase:
 # helpers
 
 
-def fromstring(data: bytes) -> Image.Image:
+def fromstring(data: bytes) -> ImageFile.ImageFile:
     return Image.open(BytesIO(data))
 
 

Tests/oss-fuzz/test_fuzzers.py

@@ -12,8 +12,9 @@ from Tests.helper import skip_unless_feature
 
 if sys.platform.startswith("win32"):
     pytest.skip("Fuzzer is linux only", allow_module_level=True)
-if features.check("libjpeg_turbo"):
-    version = packaging.version.parse(features.version("libjpeg_turbo"))
+libjpeg_turbo_version = features.version("libjpeg_turbo")
+if libjpeg_turbo_version is not None:
+    version = packaging.version.parse(libjpeg_turbo_version)
     if version.major == 2 and version.minor == 0:
         pytestmark = pytest.mark.valgrind_known_error(
             reason="Known failing with libjpeg_turbo 2.0"

Tests/test_color_lut.py

@@ -354,10 +354,10 @@ class TestColorLut3DCoreAPI:
 class TestColorLut3DFilter:
     def test_wrong_args(self) -> None:
         with pytest.raises(ValueError, match="should be either an integer"):
-            ImageFilter.Color3DLUT("small", [1])
+            ImageFilter.Color3DLUT("small", [1])  # type: ignore[arg-type]
 
         with pytest.raises(ValueError, match="should be either an integer"):
-            ImageFilter.Color3DLUT((11, 11), [1])
+            ImageFilter.Color3DLUT((11, 11), [1])  # type: ignore[arg-type]
 
         with pytest.raises(ValueError, match=r"in \[2, 65\] range"):
             ImageFilter.Color3DLUT((11, 11, 1), [1])

Tests/test_decompression_bomb.py

@@ -12,7 +12,7 @@ ORIGINAL_LIMIT = Image.MAX_IMAGE_PIXELS
 
 
 class TestDecompressionBomb:
-    def teardown_method(self, method) -> None:
+    def teardown_method(self) -> None:
         Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
 
     def test_no_warning_small_file(self) -> None:

Tests/test_features.py

@@ -30,7 +30,7 @@ def test_version() -> None:
     # Check the correctness of the convenience function
     # and the format of version numbers
 
-    def test(name: str, function: Callable[[str], bool]) -> None:
+    def test(name: str, function: Callable[[str], str | None]) -> None:
         version = features.version(name)
         if not features.check(name):
             assert version is None
@@ -38,7 +38,9 @@ def test_version() -> None:
             assert function(name) == version
             if name != "PIL":
                 if name == "zlib" and version is not None:
-                    version = version.replace(".zlib-ng", "")
+                    version = re.sub(".zlib-ng$", "", version)
+                elif name == "libtiff" and version is not None:
+                    version = re.sub("t$", "", version)
                 assert version is None or re.search(r"\d+(\.\d+)*$", version)
 
     for module in features.modules:
@@ -67,12 +69,16 @@ def test_webp_anim() -> None:
 
 @skip_unless_feature("libjpeg_turbo")
 def test_libjpeg_turbo_version() -> None:
-    assert re.search(r"\d+\.\d+\.\d+$", features.version("libjpeg_turbo"))
+    version = features.version("libjpeg_turbo")
+    assert version is not None
+    assert re.search(r"\d+\.\d+\.\d+$", version)
 
 
 @skip_unless_feature("libimagequant")
 def test_libimagequant_version() -> None:
-    assert re.search(r"\d+\.\d+\.\d+$", features.version("libimagequant"))
+    version = features.version("libimagequant")
+    assert version is not None
+    assert re.search(r"\d+\.\d+\.\d+$", version)
 
 
 @pytest.mark.parametrize("feature", features.modules)
@@ -120,7 +126,7 @@ def test_unsupported_module() -> None:
 
 
 @pytest.mark.parametrize("supported_formats", (True, False))
-def test_pilinfo(supported_formats) -> None:
+def test_pilinfo(supported_formats: bool) -> None:
     buf = io.StringIO()
     features.pilinfo(buf, supported_formats=supported_formats)
     out = buf.getvalue()

Tests/test_file_bmp.py

@@ -140,7 +140,7 @@ def test_load_dib() -> None:
         (124, "g/pal8v5.bmp"),
     ),
 )
-def test_dib_header_size(header_size, path):
+def test_dib_header_size(header_size: int, path: str) -> None:
     image_path = "Tests/images/bmp/" + path
     with open(image_path, "rb") as fp:
         data = fp.read()[14:]

Tests/test_file_bufrstub.py

@@ -1,10 +1,11 @@
 from __future__ import annotations
 
 from pathlib import Path
+from typing import IO
 
 import pytest
 
-from PIL import BufrStubImagePlugin, Image
+from PIL import BufrStubImagePlugin, Image, ImageFile
 
 from .helper import hopper
 
@@ -50,20 +51,20 @@ def test_save(tmp_path: Path) -> None:
 
 
 def test_handler(tmp_path: Path) -> None:
-    class TestHandler:
+    class TestHandler(ImageFile.StubHandler):
         opened = False
         loaded = False
         saved = False
 
-        def open(self, im) -> None:
+        def open(self, im: ImageFile.StubImageFile) -> None:
             self.opened = True
 
-        def load(self, im):
+        def load(self, im: ImageFile.StubImageFile) -> Image.Image:
             self.loaded = True
             im.fp.close()
             return Image.new("RGB", (1, 1))
 
-        def save(self, im, fp, filename) -> None:
+        def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
             self.saved = True
 
     handler = TestHandler()

Tests/test_file_gif.py

@@ -53,6 +53,7 @@ def test_closed_file() -> None:
 
 def test_seek_after_close() -> None:
     im = Image.open("Tests/images/iss634.gif")
+    assert isinstance(im, GifImagePlugin.GifImageFile)
     im.load()
     im.close()
 
@@ -377,7 +378,8 @@ def test_save_netpbm_bmp_mode(tmp_path: Path) -> None:
         img = img.convert("RGB")
 
         tempfile = str(tmp_path / "temp.gif")
-        GifImagePlugin._save_netpbm(img, 0, tempfile)
+        b = BytesIO()
+        GifImagePlugin._save_netpbm(img, b, tempfile)
         with Image.open(tempfile) as reloaded:
             assert_image_similar(img, reloaded.convert("RGB"), 0)
 
@@ -388,7 +390,8 @@ def test_save_netpbm_l_mode(tmp_path: Path) -> None:
         img = img.convert("L")
 
         tempfile = str(tmp_path / "temp.gif")
-        GifImagePlugin._save_netpbm(img, 0, tempfile)
+        b = BytesIO()
+        GifImagePlugin._save_netpbm(img, b, tempfile)
         with Image.open(tempfile) as reloaded:
             assert_image_similar(img, reloaded.convert("L"), 0)
 
@@ -648,7 +651,7 @@ def test_dispose2_palette(tmp_path: Path) -> None:
             assert rgb_img.getpixel((50, 50)) == circle
 
             # Check that frame transparency wasn't added unnecessarily
-            assert img._frame_transparency is None
+            assert getattr(img, "_frame_transparency") is None
 
 
 def test_dispose2_diff(tmp_path: Path) -> None:
@@ -1252,10 +1255,11 @@ def test_palette_save_L(tmp_path: Path) -> None:
 
     im = hopper("P")
     im_l = Image.frombytes("L", im.size, im.tobytes())
-    palette = bytes(im.getpalette())
+    palette = im.getpalette()
+    assert palette is not None
 
     out = str(tmp_path / "temp.gif")
-    im_l.save(out, palette=palette)
+    im_l.save(out, palette=bytes(palette))
 
     with Image.open(out) as reloaded:
         assert_image_equal(reloaded.convert("RGB"), im.convert("RGB"))

Tests/test_file_gribstub.py

@@ -5,7 +5,7 @@ from typing import IO
 
 import pytest
 
-from PIL import GribStubImagePlugin, Image
+from PIL import GribStubImagePlugin, Image, ImageFile
 
 from .helper import hopper
 
@@ -51,7 +51,7 @@ def test_save(tmp_path: Path) -> None:
 
 
 def test_handler(tmp_path: Path) -> None:
-    class TestHandler:
+    class TestHandler(ImageFile.StubHandler):
         opened = False
         loaded = False
         saved = False

Tests/test_file_hdf5stub.py

@@ -1,11 +1,12 @@
 from __future__ import annotations
 
+from io import BytesIO
 from pathlib import Path
 from typing import IO
 
 import pytest
 
-from PIL import Hdf5StubImagePlugin, Image
+from PIL import Hdf5StubImagePlugin, Image, ImageFile
 
 TEST_FILE = "Tests/images/hdf5.h5"
 
@@ -41,7 +42,7 @@ def test_load() -> None:
 def test_save() -> None:
     # Arrange
     with Image.open(TEST_FILE) as im:
-        dummy_fp = None
+        dummy_fp = BytesIO()
         dummy_filename = "dummy.filename"
 
         # Act / Assert: stub cannot save without an implemented handler
@@ -52,7 +53,7 @@ def test_save() -> None:
 
 
 def test_handler(tmp_path: Path) -> None:
-    class TestHandler:
+    class TestHandler(ImageFile.StubHandler):
         opened = False
         loaded = False
         saved = False

Tests/test_file_jpeg.py

@@ -70,7 +70,9 @@ class TestFileJpeg:
 
     def test_sanity(self) -> None:
         # internal version number
-        assert re.search(r"\d+\.\d+$", features.version_codec("jpg"))
+        version = features.version_codec("jpg")
+        assert version is not None
+        assert re.search(r"\d+\.\d+$", version)
 
         with Image.open(TEST_FILE) as im:
             im.load()
@@ -152,7 +154,7 @@ class TestFileJpeg:
             assert k > 0.9
 
     def test_rgb(self) -> None:
-        def getchannels(im: Image.Image) -> tuple[int, int, int]:
+        def getchannels(im: JpegImagePlugin.JpegImageFile) -> tuple[int, int, int]:
             return tuple(v[0] for v in im.layer)
 
         im = hopper()
@@ -169,7 +171,7 @@ class TestFileJpeg:
         [TEST_FILE, "Tests/images/pil_sample_cmyk.jpg"],
     )
     def test_dpi(self, test_image_path: str) -> None:
-        def test(xdpi: int, ydpi: int | None = None):
+        def test(xdpi: int, ydpi: int | None = None) -> tuple[int, int] | None:
             with Image.open(test_image_path) as im:
                 im = self.roundtrip(im, dpi=(xdpi, ydpi or xdpi))
             return im.info.get("dpi")
@@ -441,7 +443,9 @@ class TestFileJpeg:
         assert_image(im1, im2.mode, im2.size)
 
     def test_subsampling(self) -> None:
-        def getsampling(im: Image.Image):
+        def getsampling(
+            im: JpegImagePlugin.JpegImageFile,
+        ) -> tuple[int, int, int, int, int, int]:
             layer = im.layer
             return layer[0][1:3] + layer[1][1:3] + layer[2][1:3]
 
@@ -697,7 +701,7 @@ class TestFileJpeg:
     def test_save_cjpeg(self, tmp_path: Path) -> None:
         with Image.open(TEST_FILE) as img:
             tempfile = str(tmp_path / "temp.jpg")
-            JpegImagePlugin._save_cjpeg(img, 0, tempfile)
+            JpegImagePlugin._save_cjpeg(img, BytesIO(), tempfile)
             # Default save quality is 75%, so a tiny bit of difference is alright
             assert_image_similar_tofile(img, tempfile, 17)
 
@@ -915,24 +919,25 @@ class TestFileJpeg:
         with Image.open("Tests/images/icc-after-SOF.jpg") as im:
             assert im.info["icc_profile"] == b"profile"
 
-    def test_jpeg_magic_number(self) -> None:
+    def test_jpeg_magic_number(self, monkeypatch: pytest.MonkeyPatch) -> None:
         size = 4097
         buffer = BytesIO(b"\xFF" * size)  # Many xFF bytes
-        buffer.max_pos = 0
+        max_pos = 0
         orig_read = buffer.read
 
-        def read(n=-1):
+        def read(n: int | None = -1) -> bytes:
+            nonlocal max_pos
             res = orig_read(n)
-            buffer.max_pos = max(buffer.max_pos, buffer.tell())
+            max_pos = max(max_pos, buffer.tell())
             return res
 
-        buffer.read = read
+        monkeypatch.setattr(buffer, "read", read)
         with pytest.raises(UnidentifiedImageError):
             with Image.open(buffer):
                 pass
 
         # Assert the entire file has not been read
-        assert 0 < buffer.max_pos < size
+        assert 0 < max_pos < size
 
     def test_getxmp(self) -> None:
         with Image.open("Tests/images/xmp_test.jpg") as im:
@@ -943,6 +948,7 @@ class TestFileJpeg:
                 ):
                     assert im.getxmp() == {}
             else:
+                assert "xmp" in im.info
                 xmp = im.getxmp()
 
                 description = xmp["xmpmeta"]["RDF"]["Description"]
@@ -1027,8 +1033,10 @@ class TestFileJpeg:
 
     def test_repr_jpeg(self) -> None:
         im = hopper()
+        b = im._repr_jpeg_()
+        assert b is not None
 
-        with Image.open(BytesIO(im._repr_jpeg_())) as repr_jpeg:
+        with Image.open(BytesIO(b)) as repr_jpeg:
             assert repr_jpeg.format == "JPEG"
             assert_image_similar(im, repr_jpeg, 17)
 

Tests/test_file_jpeg2k.py

@@ -48,7 +48,9 @@ def roundtrip(im: Image.Image, **options: Any) -> Image.Image:
 
 def test_sanity() -> None:
     # Internal version number
-    assert re.search(r"\d+\.\d+\.\d+$", features.version_codec("jpg_2000"))
+    version = features.version_codec("jpg_2000")
+    assert version is not None
+    assert re.search(r"\d+\.\d+\.\d+$", version)
 
     with Image.open("Tests/images/test-card-lossless.jp2") as im:
         px = im.load()
@@ -458,7 +460,7 @@ def test_plt_marker() -> None:
         out.seek(length - 2, os.SEEK_CUR)
 
 
-def test_9bit():
+def test_9bit() -> None:
     with Image.open("Tests/images/9bit.j2k") as im:
         assert im.mode == "I;16"
         assert im.size == (128, 128)

Tests/test_file_libtiff.py

@@ -52,7 +52,9 @@ class LibTiffTestCase:
 
 class TestFileLibTiff(LibTiffTestCase):
     def test_version(self) -> None:
-        assert re.search(r"\d+\.\d+\.\d+$", features.version_codec("libtiff"))
+        version = features.version_codec("libtiff")
+        assert version is not None
+        assert re.search(r"\d+\.\d+\.\d+t?$", version)
 
     def test_g4_tiff(self, tmp_path: Path) -> None:
         """Test the ordinary file path load path"""
@@ -666,7 +668,8 @@ class TestFileLibTiff(LibTiffTestCase):
             pilim.save(buffer_io, format="tiff", compression=compression)
             buffer_io.seek(0)
 
-            assert_image_similar_tofile(pilim, buffer_io, 0)
+            with Image.open(buffer_io) as saved_im:
+                assert_image_similar(pilim, saved_im, 0)
 
         save_bytesio()
         save_bytesio("raw")

Tests/test_file_png.py

@@ -85,9 +85,9 @@ class TestFilePng:
 
     def test_sanity(self, tmp_path: Path) -> None:
         # internal version number
-        assert re.search(
-            r"\d+(\.\d+){1,3}(\.zlib\-ng)?$", features.version_codec("zlib")
-        )
+        version = features.version_codec("zlib")
+        assert version is not None
+        assert re.search(r"\d+(\.\d+){1,3}(\.zlib\-ng)?$", version)
 
         test_file = str(tmp_path / "temp.png")
 
@@ -535,8 +535,10 @@ class TestFilePng:
 
     def test_repr_png(self) -> None:
         im = hopper()
+        b = im._repr_png_()
+        assert b is not None
 
-        with Image.open(BytesIO(im._repr_png_())) as repr_png:
+        with Image.open(BytesIO(b)) as repr_png:
             assert repr_png.format == "PNG"
             assert_image_equal(im, repr_png)
 
@@ -683,6 +685,7 @@ class TestFilePng:
                 ):
                     assert im.getxmp() == {}
             else:
+                assert "xmp" in im.info
                 xmp = im.getxmp()
 
                 description = xmp["xmpmeta"]["RDF"]["Description"]
@@ -767,14 +770,10 @@ class TestFilePng:
     def test_save_stdout(self, buffer: bool) -> None:
         old_stdout = sys.stdout
 
-        if buffer:
+        class MyStdOut:
+            buffer = BytesIO()
 
-            class MyStdOut:
-                buffer = BytesIO()
-
-            mystdout = MyStdOut()
-        else:
-            mystdout = BytesIO()
+        mystdout: MyStdOut | BytesIO = MyStdOut() if buffer else BytesIO()
 
         sys.stdout = mystdout
 
@@ -784,7 +783,7 @@ class TestFilePng:
         # Reset stdout
         sys.stdout = old_stdout
 
-        if buffer:
+        if isinstance(mystdout, MyStdOut):
             mystdout = mystdout.buffer
         with Image.open(mystdout) as reloaded:
             assert_image_equal_tofile(reloaded, TEST_PNG_FILE)

Tests/test_file_ppm.py

@@ -368,14 +368,10 @@ def test_mimetypes(tmp_path: Path) -> None:
 def test_save_stdout(buffer: bool) -> None:
     old_stdout = sys.stdout
 
-    if buffer:
+    class MyStdOut:
+        buffer = BytesIO()
 
-        class MyStdOut:
-            buffer = BytesIO()
-
-        mystdout = MyStdOut()
-    else:
-        mystdout = BytesIO()
+    mystdout: MyStdOut | BytesIO = MyStdOut() if buffer else BytesIO()
 
     sys.stdout = mystdout
 
@@ -385,7 +381,7 @@ def test_save_stdout(buffer: bool) -> None:
     # Reset stdout
     sys.stdout = old_stdout
 
-    if buffer:
+    if isinstance(mystdout, MyStdOut):
         mystdout = mystdout.buffer
     with Image.open(mystdout) as reloaded:
         assert_image_equal_tofile(reloaded, TEST_FILE)

Tests/test_file_tiff.py

@@ -113,14 +113,14 @@ class TestFileTiff:
             outfile = str(tmp_path / "temp.tif")
             im.save(outfile, save_all=True, append_images=[im], tiffinfo=im.tag_v2)
 
-    def test_seek_too_large(self):
+    def test_seek_too_large(self) -> None:
         with pytest.raises(ValueError, match="Unable to seek to frame"):
             Image.open("Tests/images/seek_too_large.tif")
 
     def test_set_legacy_api(self) -> None:
         ifd = TiffImagePlugin.ImageFileDirectory_v2()
         with pytest.raises(Exception) as e:
-            ifd.legacy_api = None
+            ifd.legacy_api = False
         assert str(e.value) == "Not allowing setting of legacy api"
 
     def test_xyres_tiff(self) -> None:
@@ -759,6 +759,7 @@ class TestFileTiff:
                 ):
                     assert im.getxmp() == {}
             else:
+                assert "xmp" in im.info
                 xmp = im.getxmp()
 
                 description = xmp["xmpmeta"]["RDF"]["Description"]

Tests/test_file_webp.py

@@ -49,7 +49,9 @@ class TestFileWebp:
     def test_version(self) -> None:
         _webp.WebPDecoderVersion()
         _webp.WebPDecoderBuggyAlpha()
-        assert re.search(r"\d+\.\d+\.\d+$", features.version_module("webp"))
+        version = features.version_module("webp")
+        assert version is not None
+        assert re.search(r"\d+\.\d+\.\d+$", version)
 
     def test_read_rgb(self) -> None:
         """
@@ -196,7 +198,9 @@ class TestFileWebp:
         (0, (0,), (-1, 0, 1, 2), (253, 254, 255, 256)),
     )
     @skip_unless_feature("webp_anim")
-    def test_invalid_background(self, background, tmp_path: Path) -> None:
+    def test_invalid_background(
+        self, background: int | tuple[int, ...], tmp_path: Path
+    ) -> None:
         temp_file = str(tmp_path / "temp.webp")
         im = hopper()
         with pytest.raises(OSError):

Tests/test_file_webp_animated.py

@@ -52,8 +52,9 @@ def test_write_animation_L(tmp_path: Path) -> None:
             assert_image_similar(im, orig.convert("RGBA"), 32.9)
 
             if is_big_endian():
-                webp = parse_version(features.version_module("webp"))
-                if webp < parse_version("1.2.2"):
+                version = features.version_module("webp")
+                assert version is not None
+                if parse_version(version) < parse_version("1.2.2"):
                     pytest.skip("Fails with libwebp earlier than 1.2.2")
             orig.seek(orig.n_frames - 1)
             im.seek(im.n_frames - 1)
@@ -68,7 +69,7 @@ def test_write_animation_RGB(tmp_path: Path) -> None:
     are visually similar to the originals.
     """
 
-    def check(temp_file) -> None:
+    def check(temp_file: str) -> None:
         with Image.open(temp_file) as im:
             assert im.n_frames == 2
 
@@ -78,8 +79,9 @@ def test_write_animation_RGB(tmp_path: Path) -> None:
 
             # Compare second frame to original
             if is_big_endian():
-                webp = parse_version(features.version_module("webp"))
-                if webp < parse_version("1.2.2"):
+                version = features.version_module("webp")
+                assert version is not None
+                if parse_version(version) < parse_version("1.2.2"):
                     pytest.skip("Fails with libwebp earlier than 1.2.2")
             im.seek(1)
             im.load()

Tests/test_file_webp_metadata.py

@@ -129,6 +129,7 @@ def test_getxmp() -> None:
             ):
                 assert im.getxmp() == {}
         else:
+            assert "xmp" in im.info
             assert (
                 im.getxmp()["xmpmeta"]["xmptk"]
                 == "Adobe XMP Core 5.3-c011 66.145661, 2012/02/06-14:56:27        "

Tests/test_file_wmf.py

@@ -1,10 +1,11 @@
 from __future__ import annotations
 
 from pathlib import Path
+from typing import IO
 
 import pytest
 
-from PIL import Image, WmfImagePlugin
+from PIL import Image, ImageFile, WmfImagePlugin
 
 from .helper import assert_image_similar_tofile, hopper
 
@@ -34,10 +35,13 @@ def test_load() -> None:
 
 
 def test_register_handler(tmp_path: Path) -> None:
-    class TestHandler:
+    class TestHandler(ImageFile.StubHandler):
         methodCalled = False
 
-        def save(self, im, fp, filename) -> None:
+        def load(self, im: ImageFile.StubImageFile) -> Image.Image:
+            return Image.new("RGB", (1, 1))
+
+        def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
             self.methodCalled = True
 
     handler = TestHandler()
@@ -70,7 +74,7 @@ def test_load_set_dpi() -> None:
 
 
 @pytest.mark.parametrize("ext", (".wmf", ".emf"))
-def test_save(ext, tmp_path: Path) -> None:
+def test_save(ext: str, tmp_path: Path) -> None:
     im = hopper()
 
     tmpfile = str(tmp_path / ("temp" + ext))

Tests/test_font_leaks.py

@@ -12,7 +12,7 @@ class TestTTypeFontLeak(PillowLeakTestCase):
     iterations = 10
     mem_limit = 4096  # k
 
-    def _test_font(self, font: ImageFont.FreeTypeFont) -> None:
+    def _test_font(self, font: ImageFont.FreeTypeFont | ImageFont.ImageFont) -> None:
         im = Image.new("RGB", (255, 255), "white")
         draw = ImageDraw.ImageDraw(im)
         self._test_leak(
@@ -34,7 +34,7 @@ class TestDefaultFontLeak(TestTTypeFontLeak):
 
     def test_leak(self) -> None:
         if features.check_module("freetype2"):
-            ImageFont.core = _util.DeferredError(ImportError)
+            ImageFont.core = _util.DeferredError(ImportError("Disabled for testing"))
         try:
             default_font = ImageFont.load_default()
         finally:

Tests/test_image.py

@@ -25,6 +25,7 @@ from PIL import (
 from .helper import (
     assert_image_equal,
     assert_image_equal_tofile,
+    assert_image_similar,
     assert_image_similar_tofile,
     assert_not_all_same,
     hopper,
@@ -99,10 +100,18 @@ class TestImage:
         JPGFILE = "Tests/images/hopper.jpg"
 
         with pytest.raises(TypeError):
-            with Image.open(PNGFILE, formats=123):
+            with Image.open(PNGFILE, formats=123):  # type: ignore[arg-type]
                 pass
 
-        for formats in [["JPEG"], ("JPEG",), ["jpeg"], ["Jpeg"], ["jPeG"], ["JpEg"]]:
+        format_list: list[list[str] | tuple[str, ...]] = [
+            ["JPEG"],
+            ("JPEG",),
+            ["jpeg"],
+            ["Jpeg"],
+            ["jPeG"],
+            ["JpEg"],
+        ]
+        for formats in format_list:
             with pytest.raises(UnidentifiedImageError):
                 with Image.open(PNGFILE, formats=formats):
                     pass
@@ -138,12 +147,12 @@ class TestImage:
 
     def test_bad_mode(self) -> None:
         with pytest.raises(ValueError):
-            with Image.open("filename", "bad mode"):
+            with Image.open("filename", "bad mode"):  # type: ignore[arg-type]
                 pass
 
     def test_stringio(self) -> None:
         with pytest.raises(ValueError):
-            with Image.open(io.StringIO()):
+            with Image.open(io.StringIO()):  # type: ignore[arg-type]
                 pass
 
     def test_pathlib(self, tmp_path: Path) -> None:
@@ -185,7 +194,8 @@ class TestImage:
         with tempfile.TemporaryFile() as fp:
             im.save(fp, "JPEG")
             fp.seek(0)
-            assert_image_similar_tofile(im, fp, 20)
+            with Image.open(fp) as reloaded:
+                assert_image_similar(im, reloaded, 20)
 
     def test_unknown_extension(self, tmp_path: Path) -> None:
         im = hopper()
@@ -383,13 +393,13 @@ class TestImage:
 
         # errors
         with pytest.raises(ValueError):
-            source.alpha_composite(over, "invalid source")
+            source.alpha_composite(over, "invalid destination")  # type: ignore[arg-type]
         with pytest.raises(ValueError):
-            source.alpha_composite(over, (0, 0), "invalid destination")
+            source.alpha_composite(over, (0, 0), "invalid source")  # type: ignore[arg-type]
         with pytest.raises(ValueError):
-            source.alpha_composite(over, 0)
+            source.alpha_composite(over, 0)  # type: ignore[arg-type]
         with pytest.raises(ValueError):
-            source.alpha_composite(over, (0, 0), 0)
+            source.alpha_composite(over, (0, 0), 0)  # type: ignore[arg-type]
         with pytest.raises(ValueError):
             source.alpha_composite(over, (0, 0), (0, -1))
 
@@ -497,9 +507,11 @@ class TestImage:
     def test_check_size(self) -> None:
         # Checking that the _check_size function throws value errors when we want it to
         with pytest.raises(ValueError):
-            Image.new("RGB", 0)  # not a tuple
+            # not a tuple
+            Image.new("RGB", 0)  # type: ignore[arg-type]
         with pytest.raises(ValueError):
-            Image.new("RGB", (0,))  # Tuple too short
+            # tuple too short
+            Image.new("RGB", (0,))  # type: ignore[arg-type]
         with pytest.raises(ValueError):
             Image.new("RGB", (-1, -1))  # w,h < 0
 
@@ -897,6 +909,10 @@ class TestImage:
                     assert tag not in exif.get_ifd(0x8769)
                 assert exif.get_ifd(0xA005)
 
+    def test_empty_xmp(self) -> None:
+        with Image.open("Tests/images/hopper.gif") as im:
+            assert im.getxmp() == {}
+
     @pytest.mark.parametrize("size", ((1, 0), (0, 1), (0, 0)))
     def test_zero_tobytes(self, size: tuple[int, int]) -> None:
         im = Image.new("RGB", size)

Tests/test_image_access.py

@@ -259,6 +259,7 @@ class TestCffi(AccessTest):
         caccess = im.im.pixel_access(False)
         with pytest.warns(DeprecationWarning):
             access = PyAccess.new(im, False)
+        assert access is not None
 
         w, h = im.size
         for x in range(0, w, 10):
@@ -289,6 +290,7 @@ class TestCffi(AccessTest):
         caccess = im.im.pixel_access(False)
         with pytest.warns(DeprecationWarning):
             access = PyAccess.new(im, False)
+        assert access is not None
 
         w, h = im.size
         for x in range(0, w, 10):
@@ -299,6 +301,8 @@ class TestCffi(AccessTest):
         # Attempt to set the value on a read-only image
         with pytest.warns(DeprecationWarning):
             access = PyAccess.new(im, True)
+        assert access is not None
+
         with pytest.raises(ValueError):
             access[(0, 0)] = color
 
@@ -341,6 +345,8 @@ class TestCffi(AccessTest):
             im = Image.new(mode, (1, 1))
             with pytest.warns(DeprecationWarning):
                 access = PyAccess.new(im, False)
+                assert access is not None
+
                 access.putpixel((0, 0), color)
 
                 if len(color) == 3:

Tests/test_image_array.py

@@ -86,8 +86,8 @@ def test_fromarray() -> None:
     assert test("RGBX") == ("RGBA", (128, 100), True)
 
     # Test mode is None with no "typestr" in the array interface
+    wrapped = Wrapper(hopper("L"), {"shape": (100, 128)})
     with pytest.raises(TypeError):
-        wrapped = Wrapper(test("L"), {"shape": (100, 128)})
         Image.fromarray(wrapped)
 
 

Tests/test_image_crop.py

@@ -18,7 +18,7 @@ def test_crop(mode: str) -> None:
 
 
 def test_wide_crop() -> None:
-    def crop(*bbox: int) -> tuple[int, ...]:
+    def crop(bbox: tuple[int, int, int, int]) -> tuple[int, ...]:
         i = im.crop(bbox)
         h = i.histogram()
         while h and not h[-1]:
@@ -27,23 +27,23 @@ def test_wide_crop() -> None:
 
     im = Image.new("L", (100, 100), 1)
 
-    assert crop(0, 0, 100, 100) == (0, 10000)
-    assert crop(25, 25, 75, 75) == (0, 2500)
+    assert crop((0, 0, 100, 100)) == (0, 10000)
+    assert crop((25, 25, 75, 75)) == (0, 2500)
 
     # sides
-    assert crop(-25, 0, 25, 50) == (1250, 1250)
-    assert crop(0, -25, 50, 25) == (1250, 1250)
-    assert crop(75, 0, 125, 50) == (1250, 1250)
-    assert crop(0, 75, 50, 125) == (1250, 1250)
+    assert crop((-25, 0, 25, 50)) == (1250, 1250)
+    assert crop((0, -25, 50, 25)) == (1250, 1250)
+    assert crop((75, 0, 125, 50)) == (1250, 1250)
+    assert crop((0, 75, 50, 125)) == (1250, 1250)
 
-    assert crop(-25, 25, 125, 75) == (2500, 5000)
-    assert crop(25, -25, 75, 125) == (2500, 5000)
+    assert crop((-25, 25, 125, 75)) == (2500, 5000)
+    assert crop((25, -25, 75, 125)) == (2500, 5000)
 
     # corners
-    assert crop(-25, -25, 25, 25) == (1875, 625)
-    assert crop(75, -25, 125, 25) == (1875, 625)
-    assert crop(75, 75, 125, 125) == (1875, 625)
-    assert crop(-25, 75, 25, 125) == (1875, 625)
+    assert crop((-25, -25, 25, 25)) == (1875, 625)
+    assert crop((75, -25, 125, 25)) == (1875, 625)
+    assert crop((75, 75, 125, 125)) == (1875, 625)
+    assert crop((-25, 75, 25, 125)) == (1875, 625)
 
 
 @pytest.mark.parametrize("box", ((8, 2, 2, 8), (2, 8, 8, 2), (8, 8, 2, 2)))

Tests/test_image_draft.py

@@ -16,7 +16,9 @@ def draft_roundtrip(
     im = Image.new(in_mode, in_size)
     data = tostring(im, "JPEG")
     im = fromstring(data)
-    mode, box = im.draft(req_mode, req_size)
+    result = im.draft(req_mode, req_size)
+    assert result is not None
+    box = result[1]
     scale, _ = im.decoderconfig
     assert box[:2] == (0, 0)
     assert (im.width - scale) < box[2] <= im.width

Tests/test_image_filter.py

@@ -46,9 +46,9 @@ def test_sanity(filter_to_apply: ImageFilter.Filter, mode: str) -> None:
 
 @pytest.mark.parametrize("mode", ("L", "I", "RGB", "CMYK"))
 def test_sanity_error(mode: str) -> None:
+    im = hopper(mode)
     with pytest.raises(TypeError):
-        im = hopper(mode)
-        im.filter("hello")
+        im.filter("hello")  # type: ignore[arg-type]
 
 
 # crashes on small images
@@ -137,7 +137,7 @@ def test_builtinfilter_p() -> None:
     builtin_filter = ImageFilter.BuiltinFilter()
 
     with pytest.raises(ValueError):
-        builtin_filter.filter(hopper("P"))
+        builtin_filter.filter(hopper("P").im)
 
 
 def test_kernel_not_enough_coefficients() -> None:

Tests/test_image_getextrema.py

@@ -6,7 +6,7 @@ from .helper import hopper
 
 
 def test_extrema() -> None:
-    def extrema(mode: str) -> tuple[int, int] | tuple[tuple[int, int], ...]:
+    def extrema(mode: str) -> tuple[float, float] | tuple[tuple[int, int], ...]:
         return hopper(mode).getextrema()
 
     assert extrema("1") == (0, 255)

Tests/test_image_mode.py

@@ -68,7 +68,11 @@ def test_sanity() -> None:
     ),
 )
 def test_properties(
-    mode, expected_base, expected_type, expected_bands, expected_band_names
+    mode: str,
+    expected_base: str,
+    expected_type: str,
+    expected_bands: int,
+    expected_band_names: tuple[str, ...],
 ) -> None:
     assert Image.getmodebase(mode) == expected_base
     assert Image.getmodetype(mode) == expected_type

Tests/test_image_paste.py

@@ -338,3 +338,8 @@ class TestImagingPaste:
 
         im.copy().paste(im2)
         im.copy().paste(im2, (0, 0))
+
+    def test_incorrect_abbreviated_form(self) -> None:
+        im = Image.new("L", (1, 1))
+        with pytest.raises(ValueError):
+            im.paste(im, im, im)

Tests/test_image_point.py

@@ -61,4 +61,4 @@ def test_f_lut() -> None:
 def test_f_mode() -> None:
     im = hopper("F")
     with pytest.raises(ValueError):
-        im.point(None)
+        im.point([])

Tests/test_image_putpalette.py

@@ -79,6 +79,7 @@ def test_putpalette_with_alpha_values() -> None:
     (
         ("RGBA", (1, 2, 3, 4)),
         ("RGBAX", (1, 2, 3, 4, 0)),
+        ("ARGB", (4, 1, 2, 3)),
     ),
 )
 def test_rgba_palette(mode: str, palette: tuple[int, ...]) -> None:

Tests/test_image_quantize.py

@@ -24,8 +24,9 @@ def test_sanity() -> None:
 def test_libimagequant_quantize() -> None:
     image = hopper()
     if is_ppc64le():
-        libimagequant = parse_version(features.version_feature("libimagequant"))
-        if libimagequant < parse_version("4"):
+        version = features.version_feature("libimagequant")
+        assert version is not None
+        if parse_version(version) < parse_version("4"):
             pytest.skip("Fails with libimagequant earlier than 4.0.0 on ppc64le")
     converted = image.quantize(100, Image.Quantize.LIBIMAGEQUANT)
     assert converted.mode == "P"
@@ -97,7 +98,7 @@ def test_quantize_dither_diff() -> None:
 @pytest.mark.parametrize(
     "method", (Image.Quantize.MEDIANCUT, Image.Quantize.MAXCOVERAGE)
 )
-def test_quantize_kmeans(method) -> None:
+def test_quantize_kmeans(method: Image.Quantize) -> None:
     im = hopper()
     no_kmeans = im.quantize(kmeans=0, method=method)
     kmeans = im.quantize(kmeans=1, method=method)

Tests/test_image_reduce.py

@@ -56,10 +56,12 @@ def test_args_factor(size: int | tuple[int, int], expected: tuple[int, int]) ->
 @pytest.mark.parametrize(
     "size, expected_error", ((0, ValueError), (2.0, TypeError), ((0, 10), ValueError))
 )
-def test_args_factor_error(size: float | tuple[int, int], expected_error) -> None:
+def test_args_factor_error(
+    size: float | tuple[int, int], expected_error: type[Exception]
+) -> None:
     im = Image.new("L", (10, 10))
     with pytest.raises(expected_error):
-        im.reduce(size)
+        im.reduce(size)  # type: ignore[arg-type]
 
 
 @pytest.mark.parametrize(
@@ -86,10 +88,12 @@ def test_args_box(size: tuple[int, int, int, int], expected: tuple[int, int]) ->
         ((5, 0, 5, 10), ValueError),
     ),
 )
-def test_args_box_error(size: str | tuple[int, int, int, int], expected_error) -> None:
+def test_args_box_error(
+    size: str | tuple[int, int, int, int], expected_error: type[Exception]
+) -> None:
     im = Image.new("L", (10, 10))
     with pytest.raises(expected_error):
-        im.reduce(2, size).size
+        im.reduce(2, size).size  # type: ignore[arg-type]
 
 
 @pytest.mark.parametrize("mode", ("P", "1", "I;16"))
@@ -102,7 +106,7 @@ def test_unsupported_modes(mode: str) -> None:
 def get_image(mode: str) -> Image.Image:
     mode_info = ImageMode.getmode(mode)
     if mode_info.basetype == "L":
-        bands = [gradients_image]
+        bands: list[Image.Image] = [gradients_image]
         for _ in mode_info.bands[1:]:
             # rotate previous image
             band = bands[-1].transpose(Image.Transpose.ROTATE_90)

Tests/test_image_resample.py

@@ -445,7 +445,7 @@ class TestCoreResampleBox:
         im.resize((32, 32), resample, (20, 20, 100, 20))
 
         with pytest.raises(TypeError, match="must be sequence of length 4"):
-            im.resize((32, 32), resample, (im.width, im.height))
+            im.resize((32, 32), resample, (im.width, im.height))  # type: ignore[arg-type]
 
         with pytest.raises(ValueError, match="can't be negative"):
             im.resize((32, 32), resample, (-20, 20, 100, 100))

Tests/test_image_rotate.py

@@ -124,8 +124,8 @@ def test_fastpath_translate() -> None:
 def test_center() -> None:
     im = hopper()
     rotate(im, im.mode, 45, center=(0, 0))
-    rotate(im, im.mode, 45, translate=(im.size[0] / 2, 0))
-    rotate(im, im.mode, 45, center=(0, 0), translate=(im.size[0] / 2, 0))
+    rotate(im, im.mode, 45, translate=(im.size[0] // 2, 0))
+    rotate(im, im.mode, 45, center=(0, 0), translate=(im.size[0] // 2, 0))
 
 
 def test_rotate_no_fill() -> None:

Tests/test_image_thumbnail.py

@@ -16,7 +16,7 @@ from .helper import (
 
 def test_sanity() -> None:
     im = hopper()
-    assert im.thumbnail((100, 100)) is None
+    im.thumbnail((100, 100))
 
     assert im.size == (100, 100)
 
@@ -111,7 +111,9 @@ def test_load_first_unless_jpeg() -> None:
     with Image.open("Tests/images/hopper.jpg") as im:
         draft = im.draft
 
-        def im_draft(mode: str, size: tuple[int, int]):
+        def im_draft(
+            mode: str, size: tuple[int, int]
+        ) -> tuple[str, tuple[int, int, float, float]] | None:
             result = draft(mode, size)
             assert result is not None
 

Tests/test_imagecms.py

@@ -7,7 +7,7 @@ import shutil
 import sys
 from io import BytesIO
 from pathlib import Path
-from typing import Any
+from typing import Any, Literal, cast
 
 import pytest
 
@@ -60,10 +60,13 @@ def test_sanity() -> None:
     assert list(map(type, v)) == [str, str, str, str]
 
     # internal version number
-    assert re.search(r"\d+\.\d+(\.\d+)?$", features.version_module("littlecms2"))
+    version = features.version_module("littlecms2")
+    assert version is not None
+    assert re.search(r"\d+\.\d+(\.\d+)?$", version)
 
     skip_missing()
     i = ImageCms.profileToProfile(hopper(), SRGB, SRGB)
+    assert i is not None
     assert_image(i, "RGB", (128, 128))
 
     i = hopper()
@@ -72,23 +75,27 @@ def test_sanity() -> None:
 
     t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
     i = ImageCms.applyTransform(hopper(), t)
+    assert i is not None
     assert_image(i, "RGB", (128, 128))
 
     with hopper() as i:
         t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
         ImageCms.applyTransform(hopper(), t, inPlace=True)
+        assert i is not None
         assert_image(i, "RGB", (128, 128))
 
     p = ImageCms.createProfile("sRGB")
     o = ImageCms.getOpenProfile(SRGB)
     t = ImageCms.buildTransformFromOpenProfiles(p, o, "RGB", "RGB")
     i = ImageCms.applyTransform(hopper(), t)
+    assert i is not None
     assert_image(i, "RGB", (128, 128))
 
     t = ImageCms.buildProofTransform(SRGB, SRGB, SRGB, "RGB", "RGB")
     assert t.inputMode == "RGB"
     assert t.outputMode == "RGB"
     i = ImageCms.applyTransform(hopper(), t)
+    assert i is not None
     assert_image(i, "RGB", (128, 128))
 
     # test PointTransform convenience API
@@ -96,7 +103,7 @@ def test_sanity() -> None:
 
 
 def test_flags() -> None:
-    assert ImageCms.Flags.NONE == 0
+    assert ImageCms.Flags.NONE.value == 0
     assert ImageCms.Flags.GRIDPOINTS(0) == ImageCms.Flags.NONE
     assert ImageCms.Flags.GRIDPOINTS(256) == ImageCms.Flags.NONE
 
@@ -202,13 +209,13 @@ def test_exceptions() -> None:
         ImageCms.buildTransform("foo", "bar", "RGB", "RGB")
 
     with pytest.raises(ImageCms.PyCMSError, match="Invalid type for Profile"):
-        ImageCms.getProfileName(None)
+        ImageCms.getProfileName(None)  # type: ignore[arg-type]
     skip_missing()
 
     # Python <= 3.9: "an integer is required (got type NoneType)"
     # Python > 3.9: "'NoneType' object cannot be interpreted as an integer"
     with pytest.raises(ImageCms.PyCMSError, match="integer"):
-        ImageCms.isIntentSupported(SRGB, None, None)
+        ImageCms.isIntentSupported(SRGB, None, None)  # type: ignore[arg-type]
 
 
 def test_display_profile() -> None:
@@ -232,7 +239,7 @@ def test_unsupported_color_space() -> None:
             "Color space not supported for on-the-fly profile creation (unsupported)"
         ),
     ):
-        ImageCms.createProfile("unsupported")
+        ImageCms.createProfile("unsupported")  # type: ignore[arg-type]
 
 
 def test_invalid_color_temperature() -> None:
@@ -240,7 +247,7 @@ def test_invalid_color_temperature() -> None:
         ImageCms.PyCMSError,
         match='Color temperature must be numeric, "invalid" not valid',
     ):
-        ImageCms.createProfile("LAB", "invalid")
+        ImageCms.createProfile("LAB", "invalid")  # type: ignore[arg-type]
 
 
 @pytest.mark.parametrize("flag", ("my string", -1))
@@ -249,7 +256,7 @@ def test_invalid_flag(flag: str | int) -> None:
         with pytest.raises(
             ImageCms.PyCMSError, match="flags must be an integer between 0 and "
         ):
-            ImageCms.profileToProfile(im, "foo", "bar", flags=flag)
+            ImageCms.profileToProfile(im, "foo", "bar", flags=flag)  # type: ignore[arg-type]
 
 
 def test_simple_lab() -> None:
@@ -260,7 +267,7 @@ def test_simple_lab() -> None:
     t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
 
     i_lab = ImageCms.applyTransform(i, t)
-
+    assert i_lab is not None
     assert i_lab.mode == "LAB"
 
     k = i_lab.getpixel((0, 0))
@@ -284,6 +291,7 @@ def test_lab_color() -> None:
     # Need to add a type mapping for some PIL type to TYPE_Lab_8 in findLCMSType, and
     # have that mapping work back to a PIL mode (likely RGB).
     i = ImageCms.applyTransform(hopper(), t)
+    assert i is not None
     assert_image(i, "LAB", (128, 128))
 
     # i.save('temp.lab.tif')  # visually verified vs PS.
@@ -298,6 +306,7 @@ def test_lab_srgb() -> None:
 
     with Image.open("Tests/images/hopper.Lab.tif") as img:
         img_srgb = ImageCms.applyTransform(img, t)
+    assert img_srgb is not None
 
     # img_srgb.save('temp.srgb.tif') # visually verified vs ps.
 
@@ -317,11 +326,11 @@ def test_lab_roundtrip() -> None:
     t2 = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
 
     i = ImageCms.applyTransform(hopper(), t)
-
+    assert i is not None
     assert i.info["icc_profile"] == ImageCmsProfile(pLab).tobytes()
 
     out = ImageCms.applyTransform(i, t2)
-
+    assert out is not None
     assert_image_similar(hopper(), out, 2)
 
 
@@ -343,7 +352,7 @@ def test_extended_information() -> None:
     p = o.profile
 
     def assert_truncated_tuple_equal(
-        tup1: tuple[Any, ...], tup2: tuple[Any, ...], digits: int = 10
+        tup1: tuple[Any, ...] | None, tup2: tuple[Any, ...], digits: int = 10
     ) -> None:
         # Helper function to reduce precision of tuples of floats
         # recursively and then check equality.
@@ -359,6 +368,7 @@ def test_extended_information() -> None:
                 for val in tuple_value
             )
 
+        assert tup1 is not None
         assert truncate_tuple(tup1) == truncate_tuple(tup2)
 
     assert p.attributes == 4294967296
@@ -504,22 +514,22 @@ def test_non_ascii_path(tmp_path: Path) -> None:
 def test_profile_typesafety() -> None:
     # does not segfault
     with pytest.raises(TypeError, match="Invalid type for Profile"):
-        ImageCms.ImageCmsProfile(0).tobytes()
+        ImageCms.ImageCmsProfile(0)  # type: ignore[arg-type]
     with pytest.raises(TypeError, match="Invalid type for Profile"):
-        ImageCms.ImageCmsProfile(1).tobytes()
+        ImageCms.ImageCmsProfile(1)  # type: ignore[arg-type]
 
     # also check core function
     with pytest.raises(TypeError):
-        ImageCms.core.profile_tobytes(0)
+        ImageCms.core.profile_tobytes(0)  # type: ignore[arg-type]
     with pytest.raises(TypeError):
-        ImageCms.core.profile_tobytes(1)
+        ImageCms.core.profile_tobytes(1)  # type: ignore[arg-type]
 
     if not is_pypy():
         # core profile should not be directly instantiable
         with pytest.raises(TypeError):
             ImageCms.core.CmsProfile()
         with pytest.raises(TypeError):
-            ImageCms.core.CmsProfile(0)
+            ImageCms.core.CmsProfile(0)  # type: ignore[call-arg]
 
 
 @pytest.mark.skipif(is_pypy(), reason="fails on PyPy")
@@ -528,7 +538,7 @@ def test_transform_typesafety() -> None:
     with pytest.raises(TypeError):
         ImageCms.core.CmsTransform()
     with pytest.raises(TypeError):
-        ImageCms.core.CmsTransform(0)
+        ImageCms.core.CmsTransform(0)  # type: ignore[call-arg]
 
 
 def assert_aux_channel_preserved(
@@ -559,9 +569,9 @@ def assert_aux_channel_preserved(
             for delta in nine_grid_deltas:
                 channel_data.paste(
                     channel_pattern,
-                    tuple(
-                        paste_offset[c] + delta[c] * channel_pattern.size[c]
-                        for c in range(2)
+                    (
+                        paste_offset[0] + delta[0] * channel_pattern.size[0],
+                        paste_offset[1] + delta[1] * channel_pattern.size[1],
                     ),
                 )
             chans.append(channel_data)
@@ -578,11 +588,13 @@ def assert_aux_channel_preserved(
     )
 
     # apply transform
+    result_image: Image.Image | None
     if transform_in_place:
         ImageCms.applyTransform(source_image, t, inPlace=True)
         result_image = source_image
     else:
         result_image = ImageCms.applyTransform(source_image, t, inPlace=False)
+    assert result_image is not None
     result_image_aux = result_image.getchannel(preserved_channel)
 
     assert_image_equal(source_image_aux, result_image_aux)
@@ -628,8 +640,10 @@ def test_auxiliary_channels_isolated() -> None:
                     continue
 
                 # convert with and without AUX data, test colors are equal
-                source_profile = ImageCms.createProfile(src_format[1])
-                destination_profile = ImageCms.createProfile(dst_format[1])
+                src_colorSpace = cast(Literal["LAB", "XYZ", "sRGB"], src_format[1])
+                source_profile = ImageCms.createProfile(src_colorSpace)
+                dst_colorSpace = cast(Literal["LAB", "XYZ", "sRGB"], dst_format[1])
+                destination_profile = ImageCms.createProfile(dst_colorSpace)
                 source_image = src_format[3]
                 test_transform = ImageCms.buildTransform(
                     source_profile,
@@ -639,6 +653,7 @@ def test_auxiliary_channels_isolated() -> None:
                 )
 
                 # test conversion from aux-ful source
+                test_image: Image.Image | None
                 if transform_in_place:
                     test_image = source_image.copy()
                     ImageCms.applyTransform(test_image, test_transform, inPlace=True)
@@ -646,6 +661,7 @@ def test_auxiliary_channels_isolated() -> None:
                     test_image = ImageCms.applyTransform(
                         source_image, test_transform, inPlace=False
                     )
+                assert test_image is not None
 
                 # reference conversion from aux-less source
                 reference_transform = ImageCms.buildTransform(
@@ -657,7 +673,7 @@ def test_auxiliary_channels_isolated() -> None:
                 reference_image = ImageCms.applyTransform(
                     source_image.convert(src_format[2]), reference_transform
                 )
-
+                assert reference_image is not None
                 assert_image_equal(test_image.convert(dst_format[2]), reference_image)
 
 

Tests/test_imagedraw.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import contextlib
 import os.path
+from typing import Sequence
 
 import pytest
 
@@ -265,6 +266,21 @@ def test_chord_too_fat() -> None:
     assert_image_equal_tofile(im, "Tests/images/imagedraw_chord_too_fat.png")
 
 
+@pytest.mark.parametrize("mode", ("RGB", "L"))
+@pytest.mark.parametrize("xy", ((W / 2, H / 2), [W / 2, H / 2]))
+def test_circle(mode: str, xy: Sequence[float]) -> None:
+    # Arrange
+    im = Image.new(mode, (W, H))
+    draw = ImageDraw.Draw(im)
+    expected = f"Tests/images/imagedraw_ellipse_{mode}.png"
+
+    # Act
+    draw.circle(xy, 25, fill="green", outline="blue")
+
+    # Assert
+    assert_image_similar_tofile(im, expected, 1)
+
+
 @pytest.mark.parametrize("mode", ("RGB", "L"))
 @pytest.mark.parametrize("bbox", BBOX)
 def test_ellipse(mode: str, bbox: Coords) -> None:
@@ -432,6 +448,7 @@ def test_shape1() -> None:
     x3, y3 = 95, 5
 
     # Act
+    assert ImageDraw.Outline is not None
     s = ImageDraw.Outline()
     s.move(x0, y0)
     s.curve(x1, y1, x2, y2, x3, y3)
@@ -453,6 +470,7 @@ def test_shape2() -> None:
     x3, y3 = 5, 95
 
     # Act
+    assert ImageDraw.Outline is not None
     s = ImageDraw.Outline()
     s.move(x0, y0)
     s.curve(x1, y1, x2, y2, x3, y3)
@@ -471,6 +489,7 @@ def test_transform() -> None:
     draw = ImageDraw.Draw(im)
 
     # Act
+    assert ImageDraw.Outline is not None
     s = ImageDraw.Outline()
     s.line(0, 0)
     s.transform((0, 0, 0, 0, 0, 0))
@@ -897,7 +916,12 @@ def test_rounded_rectangle_translucent(
 def test_floodfill(bbox: Coords) -> None:
     red = ImageColor.getrgb("red")
 
-    for mode, value in [("L", 1), ("RGBA", (255, 0, 0, 0)), ("RGB", red)]:
+    mode_values: list[tuple[str, int | tuple[int, ...]]] = [
+        ("L", 1),
+        ("RGBA", (255, 0, 0, 0)),
+        ("RGB", red),
+    ]
+    for mode, value in mode_values:
         # Arrange
         im = Image.new(mode, (W, H))
         draw = ImageDraw.Draw(im)
@@ -1067,8 +1091,8 @@ def test_line_horizontal() -> None:
     )
 
 
+@pytest.mark.xfail(reason="failing test")
 def test_line_h_s1_w2() -> None:
-    pytest.skip("failing")
     img, draw = create_base_image_draw((20, 20))
     draw.line((5, 5, 14, 6), BLACK, 2)
     assert_image_equal_tofile(
@@ -1413,6 +1437,7 @@ def test_same_color_outline(bbox: Coords) -> None:
     x2, y2 = 95, 50
     x3, y3 = 95, 5
 
+    assert ImageDraw.Outline is not None
     s = ImageDraw.Outline()
     s.move(x0, y0)
     s.curve(x1, y1, x2, y2, x3, y3)
@@ -1451,7 +1476,7 @@ def test_same_color_outline(bbox: Coords) -> None:
         (4, "square", {}),
         (8, "regular_octagon", {}),
         (4, "square_rotate_45", {"rotation": 45}),
-        (3, "triangle_width", {"width": 5, "outline": "yellow"}),
+        (3, "triangle_width", {"outline": "yellow", "width": 5}),
     ],
 )
 def test_draw_regular_polygon(
@@ -1461,7 +1486,10 @@ def test_draw_regular_polygon(
     filename = f"Tests/images/imagedraw_{polygon_name}.png"
     draw = ImageDraw.Draw(im)
     bounding_circle = ((W // 2, H // 2), 25)
-    draw.regular_polygon(bounding_circle, n_sides, fill="red", **args)
+    rotation = int(args.get("rotation", 0))
+    outline = args.get("outline")
+    width = int(args.get("width", 1))
+    draw.regular_polygon(bounding_circle, n_sides, rotation, "red", outline, width)
     assert_image_equal_tofile(im, filename)
 
 
@@ -1546,10 +1574,14 @@ def test_compute_regular_polygon_vertices(
     ],
 )
 def test_compute_regular_polygon_vertices_input_error_handling(
-    n_sides, bounding_circle, rotation, expected_error, error_message
+    n_sides: int,
+    bounding_circle: int | tuple[int | tuple[int] | str, ...],
+    rotation: int | str,
+    expected_error: type[Exception],
+    error_message: str,
 ) -> None:
     with pytest.raises(expected_error) as e:
-        ImageDraw._compute_regular_polygon_vertices(bounding_circle, n_sides, rotation)
+        ImageDraw._compute_regular_polygon_vertices(bounding_circle, n_sides, rotation)  # type: ignore[arg-type]
     assert str(e.value) == error_message
 
 
@@ -1608,3 +1640,8 @@ def test_incorrectly_ordered_coordinates(xy: tuple[int, int, int, int]) -> None:
         draw.rectangle(xy)
     with pytest.raises(ValueError):
         draw.rounded_rectangle(xy)
+
+
+def test_getdraw() -> None:
+    with pytest.warns(DeprecationWarning):
+        ImageDraw.getdraw(None, [])

Tests/test_imagedraw2.py

@@ -51,9 +51,10 @@ def test_sanity() -> None:
     pen = ImageDraw2.Pen("blue", width=7)
     draw.line(list(range(10)), pen)
 
-    draw, handler = ImageDraw.getdraw(im)
+    draw2, handler = ImageDraw.getdraw(im)
+    assert draw2 is not None
     pen = ImageDraw2.Pen("blue", width=7)
-    draw.line(list(range(10)), pen)
+    draw2.line(list(range(10)), pen)
 
 
 @pytest.mark.parametrize("bbox", BBOX)

Tests/test_imagefile.py

@@ -202,6 +202,8 @@ class TestImageFile:
 
 
 class MockPyDecoder(ImageFile.PyDecoder):
+    last: MockPyDecoder
+
     def __init__(self, mode: str, *args: Any) -> None:
         MockPyDecoder.last = self
 
@@ -213,6 +215,8 @@ class MockPyDecoder(ImageFile.PyDecoder):
 
 
 class MockPyEncoder(ImageFile.PyEncoder):
+    last: MockPyEncoder | None
+
     def __init__(self, mode: str, *args: Any) -> None:
         MockPyEncoder.last = self
 
@@ -315,6 +319,7 @@ class TestPyEncoder(CodecsTest):
             im, fp, [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize), 0, "RGB")]
         )
 
+        assert MockPyEncoder.last
         assert MockPyEncoder.last.state.xoff == xoff
         assert MockPyEncoder.last.state.yoff == yoff
         assert MockPyEncoder.last.state.xsize == xsize
@@ -329,6 +334,7 @@ class TestPyEncoder(CodecsTest):
         fp = BytesIO()
         ImageFile._save(im, fp, [("MOCK", None, 0, "RGB")])
 
+        assert MockPyEncoder.last
         assert MockPyEncoder.last.state.xoff == 0
         assert MockPyEncoder.last.state.yoff == 0
         assert MockPyEncoder.last.state.xsize == 200
@@ -375,7 +381,7 @@ class TestPyEncoder(CodecsTest):
     def test_encode(self) -> None:
         encoder = ImageFile.PyEncoder(None)
         with pytest.raises(NotImplementedError):
-            encoder.encode(None)
+            encoder.encode(0)
 
         bytes_consumed, errcode = encoder.encode_to_pyfd()
         assert bytes_consumed == 0

Tests/test_imagefont.py

@@ -34,7 +34,9 @@ pytestmark = skip_unless_feature("freetype2")
 
 
 def test_sanity() -> None:
-    assert re.search(r"\d+\.\d+\.\d+$", features.version_module("freetype2"))
+    version = features.version_module("freetype2")
+    assert version is not None
+    assert re.search(r"\d+\.\d+\.\d+$", version)
 
 
 @pytest.fixture(
@@ -207,7 +209,7 @@ def test_getlength(
         assert length == length_raqm
 
 
-def test_float_size() -> None:
+def test_float_size(layout_engine: ImageFont.Layout) -> None:
     lengths = []
     for size in (48, 48.5, 49):
         f = ImageFont.truetype(
@@ -222,7 +224,7 @@ def test_render_multiline(font: ImageFont.FreeTypeFont) -> None:
     draw = ImageDraw.Draw(im)
     line_spacing = font.getbbox("A")[3] + 4
     lines = TEST_TEXT.split("\n")
-    y = 0
+    y: float = 0
     for line in lines:
         draw.text((0, y), line, font=font)
         y += line_spacing
@@ -492,8 +494,8 @@ def test_default_font() -> None:
     assert_image_equal_tofile(im, "Tests/images/default_font_freetype.png")
 
 
-@pytest.mark.parametrize("mode", (None, "1", "RGBA"))
-def test_getbbox(font: ImageFont.FreeTypeFont, mode: str | None) -> None:
+@pytest.mark.parametrize("mode", ("", "1", "RGBA"))
+def test_getbbox(font: ImageFont.FreeTypeFont, mode: str) -> None:
     assert (0, 4, 12, 16) == font.getbbox("A", mode)
 
 
@@ -547,11 +549,10 @@ def test_find_font(
             def loadable_font(
                 filepath: str, size: int, index: int, encoding: str, *args: Any
             ):
+                _freeTypeFont = getattr(ImageFont, "_FreeTypeFont")
                 if filepath == path_to_fake:
-                    return ImageFont._FreeTypeFont(
-                        FONT_PATH, size, index, encoding, *args
-                    )
-                return ImageFont._FreeTypeFont(filepath, size, index, encoding, *args)
+                    return _freeTypeFont(FONT_PATH, size, index, encoding, *args)
+                return _freeTypeFont(filepath, size, index, encoding, *args)
 
             m.setattr(ImageFont, "FreeTypeFont", loadable_font)
             font = ImageFont.truetype(fontname)
@@ -563,6 +564,7 @@ def test_find_font(
     # catching syntax like errors
     monkeypatch.setattr(sys, "platform", platform)
     if platform == "linux":
+        monkeypatch.setenv("XDG_DATA_HOME", os.path.expanduser("~/.local/share"))
         monkeypatch.setenv("XDG_DATA_DIRS", "/usr/share/:/usr/local/share/")
 
     def fake_walker(path: str) -> list[tuple[str, list[str], list[str]]]:
@@ -630,7 +632,9 @@ def test_complex_font_settings() -> None:
 
 
 def test_variation_get(font: ImageFont.FreeTypeFont) -> None:
-    freetype = parse_version(features.version_module("freetype2"))
+    version = features.version_module("freetype2")
+    assert version is not None
+    freetype = parse_version(version)
     if freetype < parse_version("2.9.1"):
         with pytest.raises(NotImplementedError):
             font.get_variation_names()
@@ -700,7 +704,9 @@ def _check_text(font: ImageFont.FreeTypeFont, path: str, epsilon: float) -> None
 
 
 def test_variation_set_by_name(font: ImageFont.FreeTypeFont) -> None:
-    freetype = parse_version(features.version_module("freetype2"))
+    version = features.version_module("freetype2")
+    assert version is not None
+    freetype = parse_version(version)
     if freetype < parse_version("2.9.1"):
         with pytest.raises(NotImplementedError):
             font.set_variation_by_name("Bold")
@@ -725,7 +731,9 @@ def test_variation_set_by_name(font: ImageFont.FreeTypeFont) -> None:
 
 
 def test_variation_set_by_axes(font: ImageFont.FreeTypeFont) -> None:
-    freetype = parse_version(features.version_module("freetype2"))
+    version = features.version_module("freetype2")
+    assert version is not None
+    freetype = parse_version(version)
     if freetype < parse_version("2.9.1"):
         with pytest.raises(NotImplementedError):
             font.set_variation_by_axes([100])

Tests/test_imagefontpil.py

@@ -33,8 +33,11 @@ def test_default_font(font: ImageFont.ImageFont) -> None:
 def test_without_freetype() -> None:
     original_core = ImageFont.core
     if features.check_module("freetype2"):
-        ImageFont.core = _util.DeferredError(ImportError)
+        ImageFont.core = _util.DeferredError(ImportError("Disabled for testing"))
     try:
+        with pytest.raises(ImportError):
+            ImageFont.truetype("Tests/fonts/FreeMono.ttf")
+
         assert isinstance(ImageFont.load_default(), ImageFont.ImageFont)
 
         with pytest.raises(ImportError):

Tests/test_imageops.py

@@ -454,7 +454,7 @@ def test_autocontrast_cutoff() -> None:
     # Test the cutoff argument of autocontrast
     with Image.open("Tests/images/bw_gradient.png") as img:
 
-        def autocontrast(cutoff: int | tuple[int, int]):
+        def autocontrast(cutoff: int | tuple[int, int]) -> list[int]:
             return ImageOps.autocontrast(img, cutoff).histogram()
 
         assert autocontrast(10) == autocontrast((10, 10))

Tests/test_imageops_usm.py

@@ -4,11 +4,11 @@ from typing import Generator
 
 import pytest
 
-from PIL import Image, ImageFilter
+from PIL import Image, ImageFile, ImageFilter
 
 
 @pytest.fixture
-def test_images() -> Generator[dict[str, Image.Image], None, None]:
+def test_images() -> Generator[dict[str, ImageFile.ImageFile], None, None]:
     ims = {
         "im": Image.open("Tests/images/hopper.ppm"),
         "snakes": Image.open("Tests/images/color_snakes.png"),
@@ -20,7 +20,7 @@ def test_images() -> Generator[dict[str, Image.Image], None, None]:
             im.close()
 
 
-def test_filter_api(test_images: dict[str, Image.Image]) -> None:
+def test_filter_api(test_images: dict[str, ImageFile.ImageFile]) -> None:
     im = test_images["im"]
 
     test_filter = ImageFilter.GaussianBlur(2.0)
@@ -34,7 +34,7 @@ def test_filter_api(test_images: dict[str, Image.Image]) -> None:
     assert i.size == (128, 128)
 
 
-def test_usm_formats(test_images: dict[str, Image.Image]) -> None:
+def test_usm_formats(test_images: dict[str, ImageFile.ImageFile]) -> None:
     im = test_images["im"]
 
     usm = ImageFilter.UnsharpMask
@@ -52,13 +52,12 @@ def test_usm_formats(test_images: dict[str, Image.Image]) -> None:
         im.convert("YCbCr").filter(usm)
 
 
-def test_blur_formats(test_images: dict[str, Image.Image]) -> None:
+def test_blur_formats(test_images: dict[str, ImageFile.ImageFile]) -> None:
     im = test_images["im"]
 
     blur = ImageFilter.GaussianBlur
     with pytest.raises(ValueError):
         im.convert("1").filter(blur)
-    blur(im.convert("L"))
     with pytest.raises(ValueError):
         im.convert("I").filter(blur)
     with pytest.raises(ValueError):
@@ -70,7 +69,7 @@ def test_blur_formats(test_images: dict[str, Image.Image]) -> None:
         im.convert("YCbCr").filter(blur)
 
 
-def test_usm_accuracy(test_images: dict[str, Image.Image]) -> None:
+def test_usm_accuracy(test_images: dict[str, ImageFile.ImageFile]) -> None:
     snakes = test_images["snakes"]
 
     src = snakes.convert("RGB")
@@ -79,7 +78,7 @@ def test_usm_accuracy(test_images: dict[str, Image.Image]) -> None:
     assert i.tobytes() == src.tobytes()
 
 
-def test_blur_accuracy(test_images: dict[str, Image.Image]) -> None:
+def test_blur_accuracy(test_images: dict[str, ImageFile.ImageFile]) -> None:
     snakes = test_images["snakes"]
 
     i = snakes.filter(ImageFilter.GaussianBlur(0.4))

Tests/test_imagepalette.py

@@ -45,7 +45,7 @@ def test_getcolor() -> None:
 
     # Test unknown color specifier
     with pytest.raises(ValueError):
-        palette.getcolor("unknown")
+        palette.getcolor("unknown")  # type: ignore[arg-type]
 
 
 def test_getcolor_rgba_color_rgb_palette() -> None:

Tests/test_imageqt.py

@@ -41,18 +41,13 @@ def test_rgb() -> None:
     checkrgb(0, 0, 255)
 
 
-def test_image() -> None:
-    modes = ["1", "RGB", "RGBA", "L", "P"]
-    qt_format = ImageQt.QImage.Format if ImageQt.qt_version == "6" else ImageQt.QImage
-    if hasattr(qt_format, "Format_Grayscale16"):  # Qt 5.13+
-        modes.append("I;16")
-
-    for mode in modes:
-        im = hopper(mode)
-        roundtripped_im = ImageQt.fromqimage(ImageQt.ImageQt(im))
-        if mode not in ("RGB", "RGBA"):
-            im = im.convert("RGB")
-        assert_image_similar(roundtripped_im, im, 1)
+@pytest.mark.parametrize("mode", ("1", "RGB", "RGBA", "L", "P", "I;16"))
+def test_image(mode: str) -> None:
+    im = hopper(mode)
+    roundtripped_im = ImageQt.fromqimage(ImageQt.ImageQt(im))
+    if mode not in ("RGB", "RGBA"):
+        im = im.convert("RGB")
+    assert_image_similar(roundtripped_im, im, 1)
 
 
 def test_closed_file() -> None:

Tests/test_imagestat.py

@@ -25,10 +25,10 @@ def test_sanity() -> None:
     st.stddev
 
     with pytest.raises(AttributeError):
-        st.spam()
+        st.spam()  # type: ignore[attr-defined]
 
     with pytest.raises(TypeError):
-        ImageStat.Stat(1)
+        ImageStat.Stat(1)  # type: ignore[arg-type]
 
 
 def test_hopper() -> None:

Tests/test_imagewin_pointers.py

@@ -70,7 +70,7 @@ if is_win32():
     ]
     CreateDIBSection.restype = ctypes.wintypes.HBITMAP
 
-    def serialize_dib(bi, pixels) -> bytearray:
+    def serialize_dib(bi: BITMAPINFOHEADER, pixels: ctypes.c_void_p) -> bytearray:
         bf = BITMAPFILEHEADER()
         bf.bfType = 0x4D42
         bf.bfOffBits = ctypes.sizeof(bf) + bi.biSize

Tests/test_main.py

@@ -11,7 +11,7 @@ import pytest
     "args, report",
     ((["PIL"], False), (["PIL", "--report"], True), (["PIL.report"], True)),
 )
-def test_main(args, report) -> None:
+def test_main(args: list[str], report: bool) -> None:
     args = [sys.executable, "-m"] + args
     out = subprocess.check_output(args).decode("utf-8")
     lines = out.splitlines()

Tests/test_numpy.py

@@ -1,20 +1,25 @@
 from __future__ import annotations
 
 import warnings
+from typing import TYPE_CHECKING
 
 import pytest
 
-from PIL import Image
+from PIL import Image, _typing
 
 from .helper import assert_deep_equal, assert_image, hopper, skip_unless_feature
 
-numpy = pytest.importorskip("numpy", reason="NumPy not installed")
+if TYPE_CHECKING:
+    import numpy
+    import numpy.typing as npt
+else:
+    numpy = pytest.importorskip("numpy", reason="NumPy not installed")
 
 TEST_IMAGE_SIZE = (10, 10)
 
 
 def test_numpy_to_image() -> None:
-    def to_image(dtype, bands: int = 1, boolean: int = 0) -> Image.Image:
+    def to_image(dtype: npt.DTypeLike, bands: int = 1, boolean: int = 0) -> Image.Image:
         if bands == 1:
             if boolean:
                 data = [0, 255] * 50
@@ -99,14 +104,14 @@ def test_1d_array() -> None:
     assert_image(Image.fromarray(a), "L", (1, 5))
 
 
-def _test_img_equals_nparray(img: Image.Image, np) -> None:
-    assert len(np.shape) >= 2
-    np_size = np.shape[1], np.shape[0]
+def _test_img_equals_nparray(img: Image.Image, np_img: _typing.NumpyArray) -> None:
+    assert len(np_img.shape) >= 2
+    np_size = np_img.shape[1], np_img.shape[0]
     assert img.size == np_size
     px = img.load()
     for x in range(0, img.size[0], int(img.size[0] / 10)):
         for y in range(0, img.size[1], int(img.size[1] / 10)):
-            assert_deep_equal(px[x, y], np[y, x])
+            assert_deep_equal(px[x, y], np_img[y, x])
 
 
 def test_16bit() -> None:
@@ -157,7 +162,7 @@ def test_save_tiff_uint16() -> None:
         ("HSV", numpy.uint8),
     ),
 )
-def test_to_array(mode: str, dtype) -> None:
+def test_to_array(mode: str, dtype: npt.DTypeLike) -> None:
     img = hopper(mode)
 
     # Resize to non-square
@@ -207,7 +212,7 @@ def test_putdata() -> None:
         numpy.float64,
     ),
 )
-def test_roundtrip_eye(dtype) -> None:
+def test_roundtrip_eye(dtype: npt.DTypeLike) -> None:
     arr = numpy.eye(10, dtype=dtype)
     numpy.testing.assert_array_equal(arr, numpy.array(Image.fromarray(arr)))
 

Tests/test_psdraw.py

@@ -54,14 +54,10 @@ def test_stdout(buffer: bool) -> None:
     # Temporarily redirect stdout
     old_stdout = sys.stdout
 
-    if buffer:
+    class MyStdOut:
+        buffer = BytesIO()
 
-        class MyStdOut:
-            buffer = BytesIO()
-
-        mystdout = MyStdOut()
-    else:
-        mystdout = BytesIO()
+    mystdout: MyStdOut | BytesIO = MyStdOut() if buffer else BytesIO()
 
     sys.stdout = mystdout
 
@@ -71,6 +67,6 @@ def test_stdout(buffer: bool) -> None:
     # Reset stdout
     sys.stdout = old_stdout
 
-    if buffer:
+    if isinstance(mystdout, MyStdOut):
         mystdout = mystdout.buffer
     assert mystdout.getvalue() != b""

Tests/test_qt_image_qapplication.py

@@ -46,7 +46,7 @@ def roundtrip(expected: Image.Image) -> None:
 @pytest.mark.skipif(not ImageQt.qt_is_installed, reason="Qt bindings are not installed")
 def test_sanity(tmp_path: Path) -> None:
     # Segfault test
-    app = QApplication([])
+    app: QApplication | None = QApplication([])
     ex = Example()
     assert app  # Silence warning
     assert ex  # Silence warning

Tests/test_shell_injection.py

@@ -1,8 +1,9 @@
 from __future__ import annotations
 
 import shutil
+from io import BytesIO
 from pathlib import Path
-from typing import Callable
+from typing import IO, Callable
 
 import pytest
 
@@ -22,11 +23,11 @@ class TestShellInjection:
         self,
         tmp_path: Path,
         src_img: Image.Image,
-        save_func: Callable[[Image.Image, int, str], None],
+        save_func: Callable[[Image.Image, IO[bytes], str | bytes], None],
     ) -> None:
         for filename in test_filenames:
             dest_file = str(tmp_path / filename)
-            save_func(src_img, 0, dest_file)
+            save_func(src_img, BytesIO(), dest_file)
             # If file can't be opened, shell injection probably occurred
             with Image.open(dest_file) as im:
                 im.load()

depends/install_imagequant.sh

@@ -2,7 +2,7 @@
 # install libimagequant
 
 archive_name=libimagequant
-archive_version=4.3.0
+archive_version=4.3.1
 
 archive=$archive_name-$archive_version
 

depends/install_webp.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 # install webp
 
-archive=libwebp-1.3.2
+archive=libwebp-1.4.0
 
 ./download-and-extract.sh $archive https://raw.githubusercontent.com/python-pillow/pillow-depends/main/$archive.tar.gz
 

docs/Makefile

@@ -9,9 +9,9 @@ PAPER         =
 BUILDDIR      = _build
 
 # Internal variables.
-PAPEROPT_a4     = -D latex_paper_size=a4
-PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+PAPEROPT_a4     = --define latex_paper_size=a4
+PAPEROPT_letter = --define latex_paper_size=letter
+ALLSPHINXOPTS   = --doctree-dir $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 # the i18n builder cannot share the environment and doctrees with the others
 I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 
@@ -51,42 +51,42 @@ install-sphinx:
 .PHONY: html
 html:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b html -W --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	$(SPHINXBUILD) --builder html --fail-on-warning --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
 
 .PHONY: dirhtml
 dirhtml:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	$(SPHINXBUILD) --builder dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
 
 .PHONY: singlehtml
 singlehtml:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	$(SPHINXBUILD) --builder singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
 	@echo
 	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
 
 .PHONY: pickle
 pickle:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	$(SPHINXBUILD) --builder pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
 	@echo
 	@echo "Build finished; now you can process the pickle files."
 
 .PHONY: json
 json:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	$(SPHINXBUILD) --builder json $(ALLSPHINXOPTS) $(BUILDDIR)/json
 	@echo
 	@echo "Build finished; now you can process the JSON files."
 
 .PHONY: htmlhelp
 htmlhelp:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	$(SPHINXBUILD) --builder htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
 	@echo
 	@echo "Build finished; now you can run HTML Help Workshop with the" \
 	      ".hhp project file in $(BUILDDIR)/htmlhelp."
@@ -94,7 +94,7 @@ htmlhelp:
 .PHONY: qthelp
 qthelp:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	$(SPHINXBUILD) --builder qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
 	@echo
 	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
 	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
@@ -105,7 +105,7 @@ qthelp:
 .PHONY: devhelp
 devhelp:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	$(SPHINXBUILD) --builder devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
 	@echo
 	@echo "Build finished."
 	@echo "To view the help file:"
@@ -116,14 +116,14 @@ devhelp:
 .PHONY: epub
 epub:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	$(SPHINXBUILD) --builder epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
 	@echo
 	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
 
 .PHONY: latex
 latex:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	$(SPHINXBUILD) --builder latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
 	@echo
 	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
 	@echo "Run \`make' in that directory to run these through (pdf)latex" \
@@ -132,7 +132,7 @@ latex:
 .PHONY: latexpdf
 latexpdf:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	$(SPHINXBUILD) --builder latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
 	@echo "Running LaTeX files through pdflatex..."
 	$(MAKE) -C $(BUILDDIR)/latex all-pdf
 	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
@@ -140,21 +140,21 @@ latexpdf:
 .PHONY: text
 text:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	$(SPHINXBUILD) --builder text $(ALLSPHINXOPTS) $(BUILDDIR)/text
 	@echo
 	@echo "Build finished. The text files are in $(BUILDDIR)/text."
 
 .PHONY: man
 man:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	$(SPHINXBUILD) --builder man $(ALLSPHINXOPTS) $(BUILDDIR)/man
 	@echo
 	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
 
 .PHONY: texinfo
 texinfo:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	$(SPHINXBUILD) --builder texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
 	@echo
 	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
 	@echo "Run \`make' in that directory to run these through makeinfo" \
@@ -163,7 +163,7 @@ texinfo:
 .PHONY: info
 info:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	$(SPHINXBUILD) --builder texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
 	@echo "Running Texinfo files through makeinfo..."
 	make -C $(BUILDDIR)/texinfo info
 	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
@@ -171,21 +171,21 @@ info:
 .PHONY: gettext
 gettext:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+	$(SPHINXBUILD) --builder gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
 	@echo
 	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
 
 .PHONY: changes
 changes:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	$(SPHINXBUILD) --builder changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
 	@echo
 	@echo "The overview file is in $(BUILDDIR)/changes."
 
 .PHONY: linkcheck
 linkcheck:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck -j auto
+	$(SPHINXBUILD) --builder linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck -j auto
 	@echo
 	@echo "Link check complete; look for any errors in the above output " \
 	      "or in $(BUILDDIR)/linkcheck/output.txt."
@@ -193,7 +193,7 @@ linkcheck:
 .PHONY: doctest
 doctest:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	$(SPHINXBUILD) --builder doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
 	@echo "Testing of doctests in the sources finished, look at the " \
 	      "results in $(BUILDDIR)/doctest/output.txt."
 

docs/deprecations.rst

@@ -115,6 +115,13 @@ Support for LibTIFF earlier than 4
 Support for LibTIFF earlier than version 4 has been deprecated.
 Upgrade to a newer version of LibTIFF instead.
 
+ImageDraw.getdraw hints parameter
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. deprecated:: 10.4.0
+
+The ``hints`` parameter in :py:meth:`~PIL.ImageDraw.getdraw()` has been deprecated.
+
 Removed features
 ----------------
 

docs/handbook/concepts.rst

@@ -144,10 +144,12 @@ pixel, the Python Imaging Library provides different resampling *filters*.
 .. py:currentmodule:: PIL.Image
 
 .. data:: Resampling.NEAREST
+    :noindex:
 
     Pick one nearest pixel from the input image. Ignore all other input pixels.
 
 .. data:: Resampling.BOX
+    :noindex:
 
     Each pixel of source image contributes to one pixel of the
     destination image with identical weights.
@@ -158,6 +160,7 @@ pixel, the Python Imaging Library provides different resampling *filters*.
     .. versionadded:: 3.4.0
 
 .. data:: Resampling.BILINEAR
+    :noindex:
 
     For resize calculate the output pixel value using linear interpolation
     on all pixels that may contribute to the output value.
@@ -165,6 +168,7 @@ pixel, the Python Imaging Library provides different resampling *filters*.
     in the input image is used.
 
 .. data:: Resampling.HAMMING
+    :noindex:
 
     Produces a sharper image than :data:`Resampling.BILINEAR`, doesn't have
     dislocations on local level like with :data:`Resampling.BOX`.
@@ -174,6 +178,7 @@ pixel, the Python Imaging Library provides different resampling *filters*.
     .. versionadded:: 3.4.0
 
 .. data:: Resampling.BICUBIC
+    :noindex:
 
     For resize calculate the output pixel value using cubic interpolation
     on all pixels that may contribute to the output value.
@@ -181,6 +186,7 @@ pixel, the Python Imaging Library provides different resampling *filters*.
     in the input image is used.
 
 .. data:: Resampling.LANCZOS
+    :noindex:
 
     Calculate the output pixel value using a high-quality Lanczos filter (a
     truncated sinc) on all pixels that may contribute to the output value.

docs/installation/building-from-source.rst

@@ -68,7 +68,7 @@ Many of Pillow's features require external libraries:
 
 * **libimagequant** provides improved color quantization
 
-  * Pillow has been tested with libimagequant **2.6-4.3**
+  * Pillow has been tested with libimagequant **2.6-4.3.1**
   * Libimagequant is licensed GPLv3, which is more restrictive than
     the Pillow license, therefore we will not be distributing binaries
     with libimagequant support enabled.

docs/reference/Image.rst

@@ -78,8 +78,6 @@ Constructing images
 ^^^^^^^^^^^^^^^^^^^
 
 .. autofunction:: new
-.. autoclass:: SupportsArrayInterface
-    :show-inheritance:
 .. autofunction:: fromarray
 .. autofunction:: frombytes
 .. autofunction:: frombuffer
@@ -197,6 +195,7 @@ This helps to get the bounding box coordinates of the input image::
 .. automethod:: PIL.Image.Image.getpalette
 .. automethod:: PIL.Image.Image.getpixel
 .. automethod:: PIL.Image.Image.getprojection
+.. automethod:: PIL.Image.Image.getxmp
 .. automethod:: PIL.Image.Image.histogram
 .. automethod:: PIL.Image.Image.paste
 .. automethod:: PIL.Image.Image.point
@@ -365,6 +364,14 @@ Classes
 .. autoclass:: PIL.Image.ImagePointHandler
 .. autoclass:: PIL.Image.ImageTransformHandler
 
+Protocols
+---------
+
+.. autoclass:: SupportsArrayInterface
+    :show-inheritance:
+.. autoclass:: SupportsGetData
+    :show-inheritance:
+
 Constants
 ---------
 
@@ -418,7 +425,6 @@ See :ref:`concept-filters` for details.
 .. autoclass:: Resampling
     :members:
     :undoc-members:
-    :noindex:
 
 Dither modes
 ^^^^^^^^^^^^

docs/reference/ImageDraw.rst

@@ -227,6 +227,18 @@ Methods
 
         .. versionadded:: 5.3.0
 
+.. py:method:: ImageDraw.circle(xy, radius, fill=None, outline=None, width=1)
+
+    Draws a circle with a given radius centering on a point.
+
+    .. versionadded:: 10.4.0
+
+    :param xy: The point for the center of the circle, e.g. ``(x, y)``.
+    :param radius: Radius of the circle.
+    :param outline: Color to use for the outline.
+    :param fill: Color to use for the fill.
+    :param width: The line width, in pixels.
+
 .. py:method:: ImageDraw.ellipse(xy, fill=None, outline=None, width=1)
 
     Draws an ellipse inside the given bounding box.

docs/reference/ImageFile.rst

@@ -57,6 +57,10 @@ Classes
     :undoc-members:
     :show-inheritance:
 
+.. autoclass:: PIL.ImageFile.StubHandler()
+    :members:
+    :show-inheritance:
+
 .. autoclass:: PIL.ImageFile.StubImageFile()
     :members:
     :show-inheritance:

docs/reference/internal_modules.rst

@@ -33,6 +33,10 @@ Internal Modules
 Provides a convenient way to import type hints that are not available
 on some Python versions.
 
+.. py:class:: NumpyArray
+
+    Typing alias.
+
 .. py:class:: StrOrBytesPath
 
     Typing alias.

docs/releasenotes/10.4.0.rst

@@ -34,6 +34,11 @@ Support for LibTIFF earlier than 4
 Support for LibTIFF earlier than version 4 has been deprecated.
 Upgrade to a newer version of LibTIFF instead.
 
+ImageDraw.getdraw hints parameter
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The ``hints`` parameter in :py:meth:`~PIL.ImageDraw.getdraw()` has been deprecated.
+
 API Changes
 ===========
 
@@ -45,6 +50,13 @@ TODO
 API Additions
 =============
 
+ImageDraw.circle
+^^^^^^^^^^^^^^^^
+
+Added :py:meth:`~PIL.ImageDraw.ImageDraw.circle`. It provides the same functionality as
+:py:meth:`~PIL.ImageDraw.ImageDraw.ellipse`, but instead of taking a bounding box, it
+takes a center point and radius.
+
 TODO
 ^^^^
 

docs/releasenotes/8.3.0.rst

@@ -18,9 +18,9 @@ is not secure.
 
 - :py:meth:`~PIL.Image.Image.getexif` has used ``xml`` to potentially retrieve
   orientation data since Pillow 7.2.0. It has been refactored to use ``re`` instead.
-- :py:meth:`~PIL.JpegImagePlugin.JpegImageFile.getxmp` was added in Pillow 8.2.0. It
-  will now use ``defusedxml`` instead. If the dependency is not present, an empty
-  dictionary will be returned and a warning raised.
+- ``getxmp()`` was added to :py:class:`~PIL.JpegImagePlugin.JpegImageFile` in Pillow
+  8.2.0. It will now use ``defusedxml`` instead. If the dependency is not present, an
+  empty dictionary will be returned and a warning raised.
 
 Deprecations
 ============

setup.py

@@ -37,7 +37,9 @@ IMAGEQUANT_ROOT = None
 JPEG2K_ROOT = None
 JPEG_ROOT = None
 LCMS_ROOT = None
+RAQM_ROOT = None
 TIFF_ROOT = None
+WEBP_ROOT = None
 ZLIB_ROOT = None
 FUZZING_BUILD = "LIB_FUZZING_ENGINE" in os.environ
 
@@ -459,6 +461,8 @@ class pil_build_ext(build_ext):
             "FREETYPE_ROOT": "freetype2",
             "HARFBUZZ_ROOT": "harfbuzz",
             "FRIBIDI_ROOT": "fribidi",
+            "RAQM_ROOT": "raqm",
+            "WEBP_ROOT": "libwebp",
             "LCMS_ROOT": "lcms2",
             "IMAGEQUANT_ROOT": "libimagequant",
         }.items():

src/PIL/BdfFontFile.py

@@ -103,7 +103,7 @@ def bdf_char(
 class BdfFontFile(FontFile.FontFile):
     """Font file plugin for the X11 BDF format."""
 
-    def __init__(self, fp: BinaryIO):
+    def __init__(self, fp: BinaryIO) -> None:
         super().__init__()
 
         s = fp.readline()

src/PIL/BlpImagePlugin.py

@@ -31,10 +31,12 @@ BLP files come in many different flavours:
 
 from __future__ import annotations
 
+import abc
 import os
 import struct
 from enum import IntEnum
 from io import BytesIO
+from typing import IO
 
 from . import Image, ImageFile
 
@@ -55,11 +57,13 @@ class AlphaEncoding(IntEnum):
     DXT5 = 7
 
 
-def unpack_565(i):
+def unpack_565(i: int) -> tuple[int, int, int]:
     return ((i >> 11) & 0x1F) << 3, ((i >> 5) & 0x3F) << 2, (i & 0x1F) << 3
 
 
-def decode_dxt1(data, alpha=False):
+def decode_dxt1(
+    data: bytes, alpha: bool = False
+) -> tuple[bytearray, bytearray, bytearray, bytearray]:
     """
     input: one "row" of data (i.e. will produce 4*width pixels)
     """
@@ -67,9 +71,9 @@ def decode_dxt1(data, alpha=False):
     blocks = len(data) // 8  # number of blocks in row
     ret = (bytearray(), bytearray(), bytearray(), bytearray())
 
-    for block in range(blocks):
+    for block_index in range(blocks):
         # Decode next 8-byte block.
-        idx = block * 8
+        idx = block_index * 8
         color0, color1, bits = struct.unpack_from("<HHI", data, idx)
 
         r0, g0, b0 = unpack_565(color0)
@@ -114,7 +118,7 @@ def decode_dxt1(data, alpha=False):
     return ret
 
 
-def decode_dxt3(data):
+def decode_dxt3(data: bytes) -> tuple[bytearray, bytearray, bytearray, bytearray]:
     """
     input: one "row" of data (i.e. will produce 4*width pixels)
     """
@@ -122,8 +126,8 @@ def decode_dxt3(data):
     blocks = len(data) // 16  # number of blocks in row
     ret = (bytearray(), bytearray(), bytearray(), bytearray())
 
-    for block in range(blocks):
-        idx = block * 16
+    for block_index in range(blocks):
+        idx = block_index * 16
         block = data[idx : idx + 16]
         # Decode next 16-byte block.
         bits = struct.unpack_from("<8B", block)
@@ -167,7 +171,7 @@ def decode_dxt3(data):
     return ret
 
 
-def decode_dxt5(data):
+def decode_dxt5(data: bytes) -> tuple[bytearray, bytearray, bytearray, bytearray]:
     """
     input: one "row" of data (i.e. will produce 4 * width pixels)
     """
@@ -175,8 +179,8 @@ def decode_dxt5(data):
     blocks = len(data) // 16  # number of blocks in row
     ret = (bytearray(), bytearray(), bytearray(), bytearray())
 
-    for block in range(blocks):
-        idx = block * 16
+    for block_index in range(blocks):
+        idx = block_index * 16
         block = data[idx : idx + 16]
         # Decode next 16-byte block.
         a0, a1 = struct.unpack_from("<BB", block)
@@ -275,7 +279,7 @@ class BlpImageFile(ImageFile.ImageFile):
 class _BLPBaseDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
         try:
             self._read_blp_header()
             self._load()
@@ -284,7 +288,12 @@ class _BLPBaseDecoder(ImageFile.PyDecoder):
             raise OSError(msg) from e
         return -1, 0
 
-    def _read_blp_header(self):
+    @abc.abstractmethod
+    def _load(self) -> None:
+        pass
+
+    def _read_blp_header(self) -> None:
+        assert self.fd is not None
         self.fd.seek(4)
         (self._blp_compression,) = struct.unpack("<i", self._safe_read(4))
 
@@ -303,10 +312,10 @@ class _BLPBaseDecoder(ImageFile.PyDecoder):
         self._blp_offsets = struct.unpack("<16I", self._safe_read(16 * 4))
         self._blp_lengths = struct.unpack("<16I", self._safe_read(16 * 4))
 
-    def _safe_read(self, length):
+    def _safe_read(self, length: int) -> bytes:
         return ImageFile._safe_read(self.fd, length)
 
-    def _read_palette(self):
+    def _read_palette(self) -> list[tuple[int, int, int, int]]:
         ret = []
         for i in range(256):
             try:
@@ -316,7 +325,7 @@ class _BLPBaseDecoder(ImageFile.PyDecoder):
             ret.append((b, g, r, a))
         return ret
 
-    def _read_bgra(self, palette):
+    def _read_bgra(self, palette: list[tuple[int, int, int, int]]) -> bytearray:
         data = bytearray()
         _data = BytesIO(self._safe_read(self._blp_lengths[0]))
         while True:
@@ -325,7 +334,7 @@ class _BLPBaseDecoder(ImageFile.PyDecoder):
             except struct.error:
                 break
             b, g, r, a = palette[offset]
-            d = (r, g, b)
+            d: tuple[int, ...] = (r, g, b)
             if self._blp_alpha_depth:
                 d += (a,)
             data.extend(d)
@@ -349,29 +358,30 @@ class BLP1Decoder(_BLPBaseDecoder):
             msg = f"Unsupported BLP compression {repr(self._blp_encoding)}"
             raise BLPFormatError(msg)
 
-    def _decode_jpeg_stream(self):
+    def _decode_jpeg_stream(self) -> None:
         from .JpegImagePlugin import JpegImageFile
 
         (jpeg_header_size,) = struct.unpack("<I", self._safe_read(4))
         jpeg_header = self._safe_read(jpeg_header_size)
+        assert self.fd is not None
         self._safe_read(self._blp_offsets[0] - self.fd.tell())  # What IS this?
         data = self._safe_read(self._blp_lengths[0])
         data = jpeg_header + data
-        data = BytesIO(data)
-        image = JpegImageFile(data)
+        image = JpegImageFile(BytesIO(data))
         Image._decompression_bomb_check(image.size)
         if image.mode == "CMYK":
             decoder_name, extents, offset, args = image.tile[0]
             image.tile = [(decoder_name, extents, offset, (args[0], "CMYK"))]
         r, g, b = image.convert("RGB").split()
-        image = Image.merge("RGB", (b, g, r))
-        self.set_as_raw(image.tobytes())
+        reversed_image = Image.merge("RGB", (b, g, r))
+        self.set_as_raw(reversed_image.tobytes())
 
 
 class BLP2Decoder(_BLPBaseDecoder):
-    def _load(self):
+    def _load(self) -> None:
         palette = self._read_palette()
 
+        assert self.fd is not None
         self.fd.seek(self._blp_offsets[0])
 
         if self._blp_compression == 1:
@@ -428,7 +438,7 @@ class BLPEncoder(ImageFile.PyEncoder):
             data += b"\x00" * 4
         return data
 
-    def encode(self, bufsize):
+    def encode(self, bufsize: int) -> tuple[int, int, bytes]:
         palette_data = self._write_palette()
 
         offset = 20 + 16 * 4 * 2 + len(palette_data)
@@ -446,7 +456,7 @@ class BLPEncoder(ImageFile.PyEncoder):
         return len(data), 0, data
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     if im.mode != "P":
         msg = "Unsupported BLP image mode"
         raise ValueError(msg)

src/PIL/BmpImagePlugin.py

@@ -25,6 +25,7 @@
 from __future__ import annotations
 
 import os
+from typing import IO
 
 from . import Image, ImageFile, ImagePalette
 from ._binary import i16le as i16
@@ -52,7 +53,7 @@ def _accept(prefix: bytes) -> bool:
     return prefix[:2] == b"BM"
 
 
-def _dib_accept(prefix):
+def _dib_accept(prefix: bytes) -> bool:
     return i32(prefix) in [12, 40, 52, 56, 64, 108, 124]
 
 
@@ -300,7 +301,8 @@ class BmpImageFile(ImageFile.ImageFile):
 class BmpRleDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
+        assert self.fd is not None
         rle4 = self.args[1]
         data = bytearray()
         x = 0
@@ -394,11 +396,13 @@ SAVE = {
 }
 
 
-def _dib_save(im, fp, filename):
+def _dib_save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     _save(im, fp, filename, False)
 
 
-def _save(im, fp, filename, bitmap_header=True):
+def _save(
+    im: Image.Image, fp: IO[bytes], filename: str | bytes, bitmap_header: bool = True
+) -> None:
     try:
         rawmode, bits, colors = SAVE[im.mode]
     except KeyError as e:

src/PIL/BufrStubImagePlugin.py

@@ -10,12 +10,14 @@
 #
 from __future__ import annotations
 
+from typing import IO
+
 from . import Image, ImageFile
 
 _handler = None
 
 
-def register_handler(handler):
+def register_handler(handler: ImageFile.StubHandler | None) -> None:
     """
     Install application-specific BUFR image handler.
 
@@ -54,11 +56,11 @@ class BufrStubImageFile(ImageFile.StubImageFile):
         if loader:
             loader.open(self)
 
-    def _load(self):
+    def _load(self) -> ImageFile.StubHandler | None:
         return _handler
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     if _handler is None or not hasattr(_handler, "save"):
         msg = "BUFR save handler not installed"
         raise OSError(msg)

src/PIL/DcxImagePlugin.py

@@ -42,7 +42,7 @@ class DcxImageFile(PcxImageFile):
     format_description = "Intel DCX"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         # Header
         s = self.fp.read(4)
         if not _accept(s):
@@ -58,7 +58,7 @@ class DcxImageFile(PcxImageFile):
             self._offset.append(offset)
 
         self._fp = self.fp
-        self.frame = None
+        self.frame = -1
         self.n_frames = len(self._offset)
         self.is_animated = self.n_frames > 1
         self.seek(0)

src/PIL/DdsImagePlugin.py

@@ -16,6 +16,7 @@ import io
 import struct
 import sys
 from enum import IntEnum, IntFlag
+from typing import IO
 
 from . import Image, ImageFile, ImagePalette
 from ._binary import i32le as i32
@@ -379,6 +380,7 @@ class DdsImageFile(ImageFile.ImageFile):
         elif pfflags & DDPF.PALETTEINDEXED8:
             self._mode = "P"
             self.palette = ImagePalette.raw("RGBA", self.fp.read(1024))
+            self.palette.mode = "RGBA"
         elif pfflags & DDPF.FOURCC:
             offset = header_size + 4
             if fourcc == D3DFMT.DXT1:
@@ -479,7 +481,8 @@ class DdsImageFile(ImageFile.ImageFile):
 class DdsRgbDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
+        assert self.fd is not None
         bitcount, masks = self.args
 
         # Some masks will be padded with zeros, e.g. R 0b11 G 0b1100
@@ -510,7 +513,7 @@ class DdsRgbDecoder(ImageFile.PyDecoder):
         return -1, 0
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     if im.mode not in ("RGB", "RGBA", "L", "LA"):
         msg = f"cannot write mode {im.mode} as DDS"
         raise OSError(msg)

src/PIL/EpsImagePlugin.py

@@ -27,6 +27,7 @@ import re
 import subprocess
 import sys
 import tempfile
+from typing import IO
 
 from . import Image, ImageFile
 from ._binary import i32le as i32
@@ -228,7 +229,7 @@ class EpsImageFile(ImageFile.ImageFile):
         reading_trailer_comments = False
         trailer_reached = False
 
-        def check_required_header_comments():
+        def check_required_header_comments() -> None:
             if "PS-Adobe" not in self.info:
                 msg = 'EPS header missing "%!PS-Adobe" comment'
                 raise SyntaxError(msg)
@@ -236,7 +237,7 @@ class EpsImageFile(ImageFile.ImageFile):
                 msg = 'EPS header missing "%%BoundingBox" comment'
                 raise SyntaxError(msg)
 
-        def _read_comment(s):
+        def _read_comment(s: str) -> bool:
             nonlocal reading_trailer_comments
             try:
                 m = split.match(s)
@@ -244,27 +245,25 @@ class EpsImageFile(ImageFile.ImageFile):
                 msg = "not an EPS file"
                 raise SyntaxError(msg) from e
 
-            if m:
-                k, v = m.group(1, 2)
-                self.info[k] = v
-                if k == "BoundingBox":
-                    if v == "(atend)":
-                        reading_trailer_comments = True
-                    elif not self._size or (
-                        trailer_reached and reading_trailer_comments
-                    ):
-                        try:
-                            # Note: The DSC spec says that BoundingBox
-                            # fields should be integers, but some drivers
-                            # put floating point values there anyway.
-                            box = [int(float(i)) for i in v.split()]
-                            self._size = box[2] - box[0], box[3] - box[1]
-                            self.tile = [
-                                ("eps", (0, 0) + self.size, offset, (length, box))
-                            ]
-                        except Exception:
-                            pass
-                return True
+            if not m:
+                return False
+
+            k, v = m.group(1, 2)
+            self.info[k] = v
+            if k == "BoundingBox":
+                if v == "(atend)":
+                    reading_trailer_comments = True
+                elif not self._size or (trailer_reached and reading_trailer_comments):
+                    try:
+                        # Note: The DSC spec says that BoundingBox
+                        # fields should be integers, but some drivers
+                        # put floating point values there anyway.
+                        box = [int(float(i)) for i in v.split()]
+                        self._size = box[2] - box[0], box[3] - box[1]
+                        self.tile = [("eps", (0, 0) + self.size, offset, (length, box))]
+                    except Exception:
+                        pass
+            return True
 
         while True:
             byte = self.fp.read(1)
@@ -413,7 +412,7 @@ class EpsImageFile(ImageFile.ImageFile):
 # --------------------------------------------------------------------
 
 
-def _save(im, fp, filename, eps=1):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes, eps: int = 1) -> None:
     """EPS Writer for the Python Imaging Library."""
 
     # make sure image data is available

src/PIL/FitsImagePlugin.py

@@ -115,14 +115,18 @@ class FitsImageFile(ImageFile.ImageFile):
         elif number_of_bits in (-32, -64):
             self._mode = "F"
 
-        args = (self.mode, 0, -1) if decoder_name == "raw" else (number_of_bits,)
+        args: tuple[str | int, ...]
+        if decoder_name == "raw":
+            args = (self.mode, 0, -1)
+        else:
+            args = (number_of_bits,)
         return decoder_name, offset, args
 
 
 class FitsGzipDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
         assert self.fd is not None
         value = gzip.decompress(self.fd.read())
 

src/PIL/FpxImagePlugin.py

@@ -70,7 +70,7 @@ class FpxImageFile(ImageFile.ImageFile):
 
         self._open_index(1)
 
-    def _open_index(self, index=1):
+    def _open_index(self, index: int = 1) -> None:
         #
         # get the Image Contents Property Set
 
@@ -85,7 +85,7 @@ class FpxImageFile(ImageFile.ImageFile):
         size = max(self.size)
         i = 1
         while size > 64:
-            size = size / 2
+            size = size // 2
             i += 1
         self.maxid = i - 1
 
@@ -118,7 +118,7 @@ class FpxImageFile(ImageFile.ImageFile):
 
         self._open_subimage(1, self.maxid)
 
-    def _open_subimage(self, index=1, subimage=0):
+    def _open_subimage(self, index: int = 1, subimage: int = 0) -> None:
         #
         # setup tile descriptors for a given subimage
 
@@ -241,7 +241,7 @@ class FpxImageFile(ImageFile.ImageFile):
         self.ole.close()
         super().close()
 
-    def __exit__(self, *args):
+    def __exit__(self, *args: object) -> None:
         self.ole.close()
         super().__exit__()
 

src/PIL/GifImagePlugin.py

@@ -29,8 +29,10 @@ import itertools
 import math
 import os
 import subprocess
+import sys
 from enum import IntEnum
 from functools import cached_property
+from typing import IO, TYPE_CHECKING, Any, List, Literal, NamedTuple, Union
 
 from . import (
     Image,
@@ -45,6 +47,9 @@ from ._binary import i16le as i16
 from ._binary import o8
 from ._binary import o16le as o16
 
+if TYPE_CHECKING:
+    from . import _imaging
+
 
 class LoadingStrategy(IntEnum):
     """.. versionadded:: 9.1.0"""
@@ -117,7 +122,7 @@ class GifImageFile(ImageFile.ImageFile):
         self._seek(0)  # get ready to read first frame
 
     @property
-    def n_frames(self):
+    def n_frames(self) -> int:
         if self._n_frames is None:
             current = self.tell()
             try:
@@ -162,11 +167,11 @@ class GifImageFile(ImageFile.ImageFile):
                 msg = "no more images in GIF file"
                 raise EOFError(msg) from e
 
-    def _seek(self, frame, update_image=True):
+    def _seek(self, frame: int, update_image: bool = True) -> None:
         if frame == 0:
             # rewind
             self.__offset = 0
-            self.dispose = None
+            self.dispose: _imaging.ImagingCore | None = None
             self.__frame = -1
             self._fp.seek(self.__rewind)
             self.disposal_method = 0
@@ -194,9 +199,9 @@ class GifImageFile(ImageFile.ImageFile):
             msg = "no more images in GIF file"
             raise EOFError(msg)
 
-        palette = None
+        palette: ImagePalette.ImagePalette | Literal[False] | None = None
 
-        info = {}
+        info: dict[str, Any] = {}
         frame_transparency = None
         interlace = None
         frame_dispose_extent = None
@@ -212,7 +217,7 @@ class GifImageFile(ImageFile.ImageFile):
                 #
                 s = self.fp.read(1)
                 block = self.data()
-                if s[0] == 249:
+                if s[0] == 249 and block is not None:
                     #
                     # graphic control extension
                     #
@@ -248,14 +253,14 @@ class GifImageFile(ImageFile.ImageFile):
                         info["comment"] = comment
                     s = None
                     continue
-                elif s[0] == 255 and frame == 0:
+                elif s[0] == 255 and frame == 0 and block is not None:
                     #
                     # application extension
                     #
                     info["extension"] = block, self.fp.tell()
                     if block[:11] == b"NETSCAPE2.0":
                         block = self.data()
-                        if len(block) >= 3 and block[0] == 1:
+                        if block and len(block) >= 3 and block[0] == 1:
                             self.info["loop"] = i16(block, 1)
                 while self.data():
                     pass
@@ -336,60 +341,60 @@ class GifImageFile(ImageFile.ImageFile):
                         self._mode = "RGB"
                         self.im = self.im.convert("RGB", Image.Dither.FLOYDSTEINBERG)
 
-        def _rgb(color):
+        def _rgb(color: int) -> tuple[int, int, int]:
             if self._frame_palette:
                 if color * 3 + 3 > len(self._frame_palette.palette):
                     color = 0
-                color = tuple(self._frame_palette.palette[color * 3 : color * 3 + 3])
+                return tuple(self._frame_palette.palette[color * 3 : color * 3 + 3])
             else:
-                color = (color, color, color)
-            return color
+                return (color, color, color)
 
+        self.dispose = None
         self.dispose_extent = frame_dispose_extent
-        try:
-            if self.disposal_method < 2:
-                # do not dispose or none specified
-                self.dispose = None
-            elif self.disposal_method == 2:
-                # replace with background colour
+        if self.dispose_extent and self.disposal_method >= 2:
+            try:
+                if self.disposal_method == 2:
+                    # replace with background colour
 
-                # only dispose the extent in this frame
-                x0, y0, x1, y1 = self.dispose_extent
-                dispose_size = (x1 - x0, y1 - y0)
-
-                Image._decompression_bomb_check(dispose_size)
-
-                # by convention, attempt to use transparency first
-                dispose_mode = "P"
-                color = self.info.get("transparency", frame_transparency)
-                if color is not None:
-                    if self.mode in ("RGB", "RGBA"):
-                        dispose_mode = "RGBA"
-                        color = _rgb(color) + (0,)
-                else:
-                    color = self.info.get("background", 0)
-                    if self.mode in ("RGB", "RGBA"):
-                        dispose_mode = "RGB"
-                        color = _rgb(color)
-                self.dispose = Image.core.fill(dispose_mode, dispose_size, color)
-            else:
-                # replace with previous contents
-                if self.im is not None:
                     # only dispose the extent in this frame
-                    self.dispose = self._crop(self.im, self.dispose_extent)
-                elif frame_transparency is not None:
                     x0, y0, x1, y1 = self.dispose_extent
                     dispose_size = (x1 - x0, y1 - y0)
 
                     Image._decompression_bomb_check(dispose_size)
+
+                    # by convention, attempt to use transparency first
                     dispose_mode = "P"
-                    color = frame_transparency
-                    if self.mode in ("RGB", "RGBA"):
-                        dispose_mode = "RGBA"
-                        color = _rgb(frame_transparency) + (0,)
+                    color = self.info.get("transparency", frame_transparency)
+                    if color is not None:
+                        if self.mode in ("RGB", "RGBA"):
+                            dispose_mode = "RGBA"
+                            color = _rgb(color) + (0,)
+                    else:
+                        color = self.info.get("background", 0)
+                        if self.mode in ("RGB", "RGBA"):
+                            dispose_mode = "RGB"
+                            color = _rgb(color)
                     self.dispose = Image.core.fill(dispose_mode, dispose_size, color)
-        except AttributeError:
-            pass
+                else:
+                    # replace with previous contents
+                    if self.im is not None:
+                        # only dispose the extent in this frame
+                        self.dispose = self._crop(self.im, self.dispose_extent)
+                    elif frame_transparency is not None:
+                        x0, y0, x1, y1 = self.dispose_extent
+                        dispose_size = (x1 - x0, y1 - y0)
+
+                        Image._decompression_bomb_check(dispose_size)
+                        dispose_mode = "P"
+                        color = frame_transparency
+                        if self.mode in ("RGB", "RGBA"):
+                            dispose_mode = "RGBA"
+                            color = _rgb(frame_transparency) + (0,)
+                        self.dispose = Image.core.fill(
+                            dispose_mode, dispose_size, color
+                        )
+            except AttributeError:
+                pass
 
         if interlace is not None:
             transparency = -1
@@ -428,7 +433,7 @@ class GifImageFile(ImageFile.ImageFile):
             self._prev_im = self.im
             if self._frame_palette:
                 self.im = Image.core.fill("P", self.size, self._frame_transparency or 0)
-                self.im.putpalette(*self._frame_palette.getdata())
+                self.im.putpalette("RGB", *self._frame_palette.getdata())
             else:
                 self.im = None
         self._mode = temp_mode
@@ -453,6 +458,8 @@ class GifImageFile(ImageFile.ImageFile):
             frame_im = self.im.convert("RGBA")
         else:
             frame_im = self.im.convert("RGB")
+
+        assert self.dispose_extent is not None
         frame_im = self._crop(frame_im, self.dispose_extent)
 
         self.im = self._prev_im
@@ -498,7 +505,12 @@ def _normalize_mode(im: Image.Image) -> Image.Image:
     return im.convert("L")
 
 
-def _normalize_palette(im, palette, info):
+_Palette = Union[bytes, bytearray, List[int], ImagePalette.ImagePalette]
+
+
+def _normalize_palette(
+    im: Image.Image, palette: _Palette | None, info: dict[str, Any]
+) -> Image.Image:
     """
     Normalizes the palette for image.
       - Sets the palette to the incoming palette, if provided.
@@ -526,8 +538,10 @@ def _normalize_palette(im, palette, info):
             source_palette = bytearray(i // 3 for i in range(768))
         im.palette = ImagePalette.ImagePalette("RGB", palette=source_palette)
 
+    used_palette_colors: list[int] | None
     if palette:
         used_palette_colors = []
+        assert source_palette is not None
         for i in range(0, len(source_palette), 3):
             source_color = tuple(source_palette[i : i + 3])
             index = im.palette.colors.get(source_color)
@@ -558,7 +572,11 @@ def _normalize_palette(im, palette, info):
     return im
 
 
-def _write_single_frame(im, fp, palette):
+def _write_single_frame(
+    im: Image.Image,
+    fp: IO[bytes],
+    palette: _Palette | None,
+) -> None:
     im_out = _normalize_mode(im)
     for k, v in im_out.info.items():
         im.encoderinfo.setdefault(k, v)
@@ -579,7 +597,9 @@ def _write_single_frame(im, fp, palette):
     fp.write(b"\0")  # end of image data
 
 
-def _getbbox(base_im, im_frame):
+def _getbbox(
+    base_im: Image.Image, im_frame: Image.Image
+) -> tuple[Image.Image, tuple[int, int, int, int] | None]:
     if _get_palette_bytes(im_frame) != _get_palette_bytes(base_im):
         im_frame = im_frame.convert("RGBA")
         base_im = base_im.convert("RGBA")
@@ -587,12 +607,20 @@ def _getbbox(base_im, im_frame):
     return delta, delta.getbbox(alpha_only=False)
 
 
-def _write_multiple_frames(im, fp, palette):
+class _Frame(NamedTuple):
+    im: Image.Image
+    bbox: tuple[int, int, int, int] | None
+    encoderinfo: dict[str, Any]
+
+
+def _write_multiple_frames(
+    im: Image.Image, fp: IO[bytes], palette: _Palette | None
+) -> bool:
     duration = im.encoderinfo.get("duration")
     disposal = im.encoderinfo.get("disposal", im.info.get("disposal"))
 
-    im_frames = []
-    previous_im = None
+    im_frames: list[_Frame] = []
+    previous_im: Image.Image | None = None
     frame_count = 0
     background_im = None
     for imSequence in itertools.chain([im], im.encoderinfo.get("append_images", [])):
@@ -618,24 +646,22 @@ def _write_multiple_frames(im, fp, palette):
             frame_count += 1
 
             diff_frame = None
-            if im_frames:
+            if im_frames and previous_im:
                 # delta frame
                 delta, bbox = _getbbox(previous_im, im_frame)
                 if not bbox:
                     # This frame is identical to the previous frame
                     if encoderinfo.get("duration"):
-                        im_frames[-1]["encoderinfo"]["duration"] += encoderinfo[
-                            "duration"
-                        ]
+                        im_frames[-1].encoderinfo["duration"] += encoderinfo["duration"]
                     continue
-                if im_frames[-1]["encoderinfo"].get("disposal") == 2:
+                if im_frames[-1].encoderinfo.get("disposal") == 2:
                     if background_im is None:
                         color = im.encoderinfo.get(
                             "transparency", im.info.get("transparency", (0, 0, 0))
                         )
                         background = _get_background(im_frame, color)
                         background_im = Image.new("P", im_frame.size, background)
-                        background_im.putpalette(im_frames[0]["im"].palette)
+                        background_im.putpalette(im_frames[0].im.palette)
                     bbox = _getbbox(background_im, im_frame)[1]
                 elif encoderinfo.get("optimize") and im_frame.mode != "1":
                     if "transparency" not in encoderinfo:
@@ -681,39 +707,39 @@ def _write_multiple_frames(im, fp, palette):
             else:
                 bbox = None
             previous_im = im_frame
-            im_frames.append(
-                {"im": diff_frame or im_frame, "bbox": bbox, "encoderinfo": encoderinfo}
-            )
+            im_frames.append(_Frame(diff_frame or im_frame, bbox, encoderinfo))
 
     if len(im_frames) == 1:
         if "duration" in im.encoderinfo:
             # Since multiple frames will not be written, use the combined duration
-            im.encoderinfo["duration"] = im_frames[0]["encoderinfo"]["duration"]
-        return
+            im.encoderinfo["duration"] = im_frames[0].encoderinfo["duration"]
+        return False
 
     for frame_data in im_frames:
-        im_frame = frame_data["im"]
-        if not frame_data["bbox"]:
+        im_frame = frame_data.im
+        if not frame_data.bbox:
             # global header
-            for s in _get_global_header(im_frame, frame_data["encoderinfo"]):
+            for s in _get_global_header(im_frame, frame_data.encoderinfo):
                 fp.write(s)
             offset = (0, 0)
         else:
             # compress difference
             if not palette:
-                frame_data["encoderinfo"]["include_color_table"] = True
+                frame_data.encoderinfo["include_color_table"] = True
 
-            im_frame = im_frame.crop(frame_data["bbox"])
-            offset = frame_data["bbox"][:2]
-        _write_frame_data(fp, im_frame, offset, frame_data["encoderinfo"])
+            im_frame = im_frame.crop(frame_data.bbox)
+            offset = frame_data.bbox[:2]
+        _write_frame_data(fp, im_frame, offset, frame_data.encoderinfo)
     return True
 
 
-def _save_all(im, fp, filename):
+def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     _save(im, fp, filename, save_all=True)
 
 
-def _save(im, fp, filename, save_all=False):
+def _save(
+    im: Image.Image, fp: IO[bytes], filename: str | bytes, save_all: bool = False
+) -> None:
     # header
     if "palette" in im.encoderinfo or "palette" in im.info:
         palette = im.encoderinfo.get("palette", im.info.get("palette"))
@@ -730,7 +756,7 @@ def _save(im, fp, filename, save_all=False):
         fp.flush()
 
 
-def get_interlace(im):
+def get_interlace(im: Image.Image) -> int:
     interlace = im.encoderinfo.get("interlace", 1)
 
     # workaround for @PIL153
@@ -740,7 +766,9 @@ def get_interlace(im):
     return interlace
 
 
-def _write_local_header(fp, im, offset, flags):
+def _write_local_header(
+    fp: IO[bytes], im: Image.Image, offset: tuple[int, int], flags: int
+) -> None:
     try:
         transparency = im.encoderinfo["transparency"]
     except KeyError:
@@ -788,7 +816,7 @@ def _write_local_header(fp, im, offset, flags):
     fp.write(o8(8))  # bits
 
 
-def _save_netpbm(im, fp, filename):
+def _save_netpbm(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     # Unused by default.
     # To use, uncomment the register_save call at the end of the file.
     #
@@ -819,6 +847,7 @@ def _save_netpbm(im, fp, filename):
                 )
 
                 # Allow ppmquant to receive SIGPIPE if ppmtogif exits
+                assert quant_proc.stdout is not None
                 quant_proc.stdout.close()
 
                 retcode = quant_proc.wait()
@@ -840,7 +869,7 @@ def _save_netpbm(im, fp, filename):
 _FORCE_OPTIMIZE = False
 
 
-def _get_optimize(im, info):
+def _get_optimize(im: Image.Image, info: dict[str, Any]) -> list[int] | None:
     """
     Palette optimization is a potentially expensive operation.
 
@@ -884,6 +913,7 @@ def _get_optimize(im, info):
                 and current_palette_size > 2
             ):
                 return used_palette_colors
+    return None
 
 
 def _get_color_table_size(palette_bytes: bytes) -> int:
@@ -924,7 +954,10 @@ def _get_palette_bytes(im: Image.Image) -> bytes:
     return im.palette.palette if im.palette else b""
 
 
-def _get_background(im, info_background):
+def _get_background(
+    im: Image.Image,
+    info_background: int | tuple[int, int, int] | tuple[int, int, int, int] | None,
+) -> int:
     background = 0
     if info_background:
         if isinstance(info_background, tuple):
@@ -947,7 +980,7 @@ def _get_background(im, info_background):
     return background
 
 
-def _get_global_header(im, info):
+def _get_global_header(im: Image.Image, info: dict[str, Any]) -> list[bytes]:
     """Return a list of strings representing a GIF header"""
 
     # Header Block
@@ -1009,7 +1042,12 @@ def _get_global_header(im, info):
     return header
 
 
-def _write_frame_data(fp, im_frame, offset, params):
+def _write_frame_data(
+    fp: IO[bytes],
+    im_frame: Image.Image,
+    offset: tuple[int, int],
+    params: dict[str, Any],
+) -> None:
     try:
         im_frame.encoderinfo = params
 
@@ -1029,7 +1067,9 @@ def _write_frame_data(fp, im_frame, offset, params):
 # Legacy GIF utilities
 
 
-def getheader(im, palette=None, info=None):
+def getheader(
+    im: Image.Image, palette: _Palette | None = None, info: dict[str, Any] | None = None
+) -> tuple[list[bytes], list[int] | None]:
     """
     Legacy Method to get Gif data from image.
 
@@ -1041,11 +1081,11 @@ def getheader(im, palette=None, info=None):
     :returns: tuple of(list of header items, optimized palette)
 
     """
-    used_palette_colors = _get_optimize(im, info)
-
     if info is None:
         info = {}
 
+    used_palette_colors = _get_optimize(im, info)
+
     if "background" not in info and "background" in im.info:
         info["background"] = im.info["background"]
 
@@ -1057,7 +1097,9 @@ def getheader(im, palette=None, info=None):
     return header, used_palette_colors
 
 
-def getdata(im, offset=(0, 0), **params):
+def getdata(
+    im: Image.Image, offset: tuple[int, int] = (0, 0), **params: Any
+) -> list[bytes]:
     """
     Legacy Method
 
@@ -1074,12 +1116,23 @@ def getdata(im, offset=(0, 0), **params):
     :returns: List of bytes containing GIF encoded frame data
 
     """
+    from io import BytesIO
 
-    class Collector:
+    class Collector(BytesIO):
         data = []
 
-        def write(self, data):
-            self.data.append(data)
+        if sys.version_info >= (3, 12):
+            from collections.abc import Buffer
+
+            def write(self, data: Buffer) -> int:
+                self.data.append(data)
+                return len(data)
+
+        else:
+
+            def write(self, data: Any) -> int:
+                self.data.append(data)
+                return len(data)
 
     im.load()  # make sure raster data is available
 

src/PIL/GimpGradientFile.py

@@ -21,6 +21,7 @@ See the GIMP distribution for more information.)
 from __future__ import annotations
 
 from math import log, pi, sin, sqrt
+from typing import IO, Callable
 
 from ._binary import o8
 
@@ -28,7 +29,7 @@ EPSILON = 1e-10
 """"""  # Enable auto-doc for data member
 
 
-def linear(middle, pos):
+def linear(middle: float, pos: float) -> float:
     if pos <= middle:
         if middle < EPSILON:
             return 0.0
@@ -43,19 +44,19 @@ def linear(middle, pos):
             return 0.5 + 0.5 * pos / middle
 
 
-def curved(middle, pos):
+def curved(middle: float, pos: float) -> float:
     return pos ** (log(0.5) / log(max(middle, EPSILON)))
 
 
-def sine(middle, pos):
+def sine(middle: float, pos: float) -> float:
     return (sin((-pi / 2.0) + pi * linear(middle, pos)) + 1.0) / 2.0
 
 
-def sphere_increasing(middle, pos):
+def sphere_increasing(middle: float, pos: float) -> float:
     return sqrt(1.0 - (linear(middle, pos) - 1.0) ** 2)
 
 
-def sphere_decreasing(middle, pos):
+def sphere_decreasing(middle: float, pos: float) -> float:
     return 1.0 - sqrt(1.0 - linear(middle, pos) ** 2)
 
 
@@ -64,9 +65,22 @@ SEGMENTS = [linear, curved, sine, sphere_increasing, sphere_decreasing]
 
 
 class GradientFile:
-    gradient = None
+    gradient: (
+        list[
+            tuple[
+                float,
+                float,
+                float,
+                list[float],
+                list[float],
+                Callable[[float, float], float],
+            ]
+        ]
+        | None
+    ) = None
 
-    def getpalette(self, entries=256):
+    def getpalette(self, entries: int = 256) -> tuple[bytes, str]:
+        assert self.gradient is not None
         palette = []
 
         ix = 0
@@ -101,7 +115,7 @@ class GradientFile:
 class GimpGradientFile(GradientFile):
     """File handler for GIMP's gradient format."""
 
-    def __init__(self, fp):
+    def __init__(self, fp: IO[bytes]) -> None:
         if fp.readline()[:13] != b"GIMP Gradient":
             msg = "not a GIMP gradient file"
             raise SyntaxError(msg)
@@ -114,7 +128,7 @@ class GimpGradientFile(GradientFile):
 
         count = int(line)
 
-        gradient = []
+        self.gradient = []
 
         for i in range(count):
             s = fp.readline().split()
@@ -132,6 +146,4 @@ class GimpGradientFile(GradientFile):
                 msg = "cannot handle HSV colour space"
                 raise OSError(msg)
 
-            gradient.append((x0, x1, xm, rgb0, rgb1, segment))
-
-        self.gradient = gradient
+            self.gradient.append((x0, x1, xm, rgb0, rgb1, segment))

src/PIL/GimpPaletteFile.py

@@ -16,6 +16,7 @@
 from __future__ import annotations
 
 import re
+from typing import IO
 
 from ._binary import o8
 
@@ -25,8 +26,8 @@ class GimpPaletteFile:
 
     rawmode = "RGB"
 
-    def __init__(self, fp):
-        self.palette = [o8(i) * 3 for i in range(256)]
+    def __init__(self, fp: IO[bytes]) -> None:
+        palette = [o8(i) * 3 for i in range(256)]
 
         if fp.readline()[:12] != b"GIMP Palette":
             msg = "not a GIMP palette file"
@@ -49,9 +50,9 @@ class GimpPaletteFile:
                 msg = "bad palette entry"
                 raise ValueError(msg)
 
-            self.palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2])
+            palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2])
 
-        self.palette = b"".join(self.palette)
+        self.palette = b"".join(palette)
 
     def getpalette(self) -> tuple[bytes, str]:
         return self.palette, self.rawmode

src/PIL/GribStubImagePlugin.py

@@ -10,12 +10,14 @@
 #
 from __future__ import annotations
 
+from typing import IO
+
 from . import Image, ImageFile
 
 _handler = None
 
 
-def register_handler(handler):
+def register_handler(handler: ImageFile.StubHandler | None) -> None:
     """
     Install application-specific GRIB image handler.
 
@@ -54,11 +56,11 @@ class GribStubImageFile(ImageFile.StubImageFile):
         if loader:
             loader.open(self)
 
-    def _load(self):
+    def _load(self) -> ImageFile.StubHandler | None:
         return _handler
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     if _handler is None or not hasattr(_handler, "save"):
         msg = "GRIB save handler not installed"
         raise OSError(msg)

src/PIL/Hdf5StubImagePlugin.py

@@ -10,12 +10,14 @@
 #
 from __future__ import annotations
 
+from typing import IO
+
 from . import Image, ImageFile
 
 _handler = None
 
 
-def register_handler(handler):
+def register_handler(handler: ImageFile.StubHandler | None) -> None:
     """
     Install application-specific HDF5 image handler.
 
@@ -54,11 +56,11 @@ class HDF5StubImageFile(ImageFile.StubImageFile):
         if loader:
             loader.open(self)
 
-    def _load(self):
+    def _load(self) -> ImageFile.StubHandler | None:
         return _handler
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     if _handler is None or not hasattr(_handler, "save"):
         msg = "HDF5 save handler not installed"
         raise OSError(msg)

src/PIL/IcnsImagePlugin.py

@@ -22,6 +22,7 @@ import io
 import os
 import struct
 import sys
+from typing import IO
 
 from . import Image, ImageFile, PngImagePlugin, features
 
@@ -312,7 +313,7 @@ class IcnsImageFile(ImageFile.ImageFile):
         return px
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     """
     Saves the image as a series of PNG files,
     that are then combined into a .icns file.
@@ -346,29 +347,27 @@ def _save(im, fp, filename):
     entries = []
     for type, size in sizes.items():
         stream = size_streams[size]
-        entries.append(
-            {"type": type, "size": HEADERSIZE + len(stream), "stream": stream}
-        )
+        entries.append((type, HEADERSIZE + len(stream), stream))
 
     # Header
     fp.write(MAGIC)
     file_length = HEADERSIZE  # Header
     file_length += HEADERSIZE + 8 * len(entries)  # TOC
-    file_length += sum(entry["size"] for entry in entries)
+    file_length += sum(entry[1] for entry in entries)
     fp.write(struct.pack(">i", file_length))
 
     # TOC
     fp.write(b"TOC ")
     fp.write(struct.pack(">i", HEADERSIZE + len(entries) * HEADERSIZE))
     for entry in entries:
-        fp.write(entry["type"])
-        fp.write(struct.pack(">i", entry["size"]))
+        fp.write(entry[0])
+        fp.write(struct.pack(">i", entry[1]))
 
     # Data
     for entry in entries:
-        fp.write(entry["type"])
-        fp.write(struct.pack(">i", entry["size"]))
-        fp.write(entry["stream"])
+        fp.write(entry[0])
+        fp.write(struct.pack(">i", entry[1]))
+        fp.write(entry[2])
 
     if hasattr(fp, "flush"):
         fp.flush()

src/PIL/IcoImagePlugin.py

@@ -25,6 +25,7 @@ from __future__ import annotations
 import warnings
 from io import BytesIO
 from math import ceil, log
+from typing import IO
 
 from . import BmpImagePlugin, Image, ImageFile, PngImagePlugin
 from ._binary import i16le as i16
@@ -39,7 +40,7 @@ from ._binary import o32le as o32
 _MAGIC = b"\0\0\1\0"
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     fp.write(_MAGIC)  # (2+2)
     bmp = im.encoderinfo.get("bitmap_format") == "bmp"
     sizes = im.encoderinfo.get(
@@ -194,7 +195,7 @@ class IcoFile:
         """
         return self.frame(self.getentryindex(size, bpp))
 
-    def frame(self, idx):
+    def frame(self, idx: int) -> Image.Image:
         """
         Get an image from frame idx
         """
@@ -205,6 +206,7 @@ class IcoFile:
         data = self.buf.read(8)
         self.buf.seek(header["offset"])
 
+        im: Image.Image
         if data[:8] == PngImagePlugin._MAGIC:
             # png frame
             im = PngImagePlugin.PngImageFile(self.buf)

src/PIL/ImImagePlugin.py

@@ -28,6 +28,7 @@ from __future__ import annotations
 
 import os
 import re
+from typing import IO, Any
 
 from . import Image, ImageFile, ImagePalette
 
@@ -103,7 +104,7 @@ for j in range(2, 33):
 split = re.compile(rb"^([A-Za-z][^:]*):[ \t]*(.*)[ \t]*$")
 
 
-def number(s):
+def number(s: Any) -> float:
     try:
         return int(s)
     except ValueError:
@@ -325,7 +326,7 @@ SAVE = {
 }
 
 
-def _save(im, fp, filename):
+def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     try:
         image_type, rawmode = SAVE[im.mode]
     except KeyError as e:
@@ -340,6 +341,8 @@ def _save(im, fp, filename):
         # or: SyntaxError("not an IM file")
         # 8 characters are used for "Name: " and "\r\n"
         # Keep just the filename, ditch the potentially overlong path
+        if isinstance(filename, bytes):
+            filename = filename.decode("ascii")
         name, ext = os.path.splitext(os.path.basename(filename))
         name = "".join([name[: 92 - len(ext)], ext])
 

src/PIL/Image.py

@@ -41,7 +41,7 @@ import warnings
 from collections.abc import Callable, MutableMapping
 from enum import IntEnum
 from types import ModuleType
-from typing import IO, TYPE_CHECKING, Any, Literal, Protocol, Sequence, cast
+from typing import IO, TYPE_CHECKING, Any, Literal, Protocol, Sequence, Tuple, cast
 
 # VERSION was removed in Pillow 6.0.0.
 # PILLOW_VERSION was removed in Pillow 9.0.0.
@@ -410,7 +410,9 @@ def init() -> bool:
 # Codec factories (used by tobytes/frombytes and ImageFile.load)
 
 
-def _getdecoder(mode, decoder_name, args, extra=()):
+def _getdecoder(
+    mode: str, decoder_name: str, args: Any, extra: tuple[Any, ...] = ()
+) -> core.ImagingDecoder | ImageFile.PyDecoder:
     # tweak arguments
     if args is None:
         args = ()
@@ -433,7 +435,9 @@ def _getdecoder(mode, decoder_name, args, extra=()):
     return decoder(mode, *args + extra)
 
 
-def _getencoder(mode, encoder_name, args, extra=()):
+def _getencoder(
+    mode: str, encoder_name: str, args: Any, extra: tuple[Any, ...] = ()
+) -> core.ImagingEncoder | ImageFile.PyEncoder:
     # tweak arguments
     if args is None:
         args = ()
@@ -503,6 +507,12 @@ def _getscaleoffset(expr):
 # Implementation wrapper
 
 
+class SupportsGetData(Protocol):
+    def getdata(
+        self,
+    ) -> tuple[Transform, Sequence[int]]: ...
+
+
 class Image:
     """
     This class represents an image object.  To create
@@ -544,10 +554,10 @@ class Image:
         return self._size
 
     @property
-    def mode(self):
+    def mode(self) -> str:
         return self._mode
 
-    def _new(self, im) -> Image:
+    def _new(self, im: core.ImagingCore) -> Image:
         new = Image()
         new.im = im
         new._mode = im.mode
@@ -620,7 +630,7 @@ class Image:
             self.load()
 
     def _dump(
-        self, file: str | None = None, format: str | None = None, **options
+        self, file: str | None = None, format: str | None = None, **options: Any
     ) -> str:
         suffix = ""
         if format:
@@ -643,10 +653,12 @@ class Image:
 
         return filename
 
-    def __eq__(self, other):
+    def __eq__(self, other: object) -> bool:
+        if self.__class__ is not other.__class__:
+            return False
+        assert isinstance(other, Image)
         return (
-            self.__class__ is other.__class__
-            and self.mode == other.mode
+            self.mode == other.mode
             and self.size == other.size
             and self.info == other.info
             and self.getpalette() == other.getpalette()
@@ -679,7 +691,7 @@ class Image:
             )
         )
 
-    def _repr_image(self, image_format, **kwargs):
+    def _repr_image(self, image_format: str, **kwargs: Any) -> bytes | None:
         """Helper function for iPython display hook.
 
         :param image_format: Image format.
@@ -692,14 +704,14 @@ class Image:
             return None
         return b.getvalue()
 
-    def _repr_png_(self):
+    def _repr_png_(self) -> bytes | None:
         """iPython display hook support for PNG format.
 
         :returns: PNG version of the image as bytes
         """
         return self._repr_image("PNG", compress_level=1)
 
-    def _repr_jpeg_(self):
+    def _repr_jpeg_(self) -> bytes | None:
         """iPython display hook support for JPEG format.
 
         :returns: JPEG version of the image as bytes
@@ -746,7 +758,7 @@ class Image:
             self.putpalette(palette)
         self.frombytes(data)
 
-    def tobytes(self, encoder_name: str = "raw", *args) -> bytes:
+    def tobytes(self, encoder_name: str = "raw", *args: Any) -> bytes:
         """
         Return image as a bytes object.
 
@@ -768,12 +780,13 @@ class Image:
         :returns: A :py:class:`bytes` object.
         """
 
-        # may pass tuple instead of argument list
-        if len(args) == 1 and isinstance(args[0], tuple):
-            args = args[0]
+        encoder_args: Any = args
+        if len(encoder_args) == 1 and isinstance(encoder_args[0], tuple):
+            # may pass tuple instead of argument list
+            encoder_args = encoder_args[0]
 
-        if encoder_name == "raw" and args == ():
-            args = self.mode
+        if encoder_name == "raw" and encoder_args == ():
+            encoder_args = self.mode
 
         self.load()
 
@@ -781,7 +794,7 @@ class Image:
             return b""
 
         # unpack data
-        e = _getencoder(self.mode, encoder_name, args)
+        e = _getencoder(self.mode, encoder_name, encoder_args)
         e.setimage(self.im)
 
         bufsize = max(65536, self.size[0] * 4)  # see RawEncode.c
@@ -824,7 +837,9 @@ class Image:
             ]
         )
 
-    def frombytes(self, data: bytes, decoder_name: str = "raw", *args) -> None:
+    def frombytes(
+        self, data: bytes | bytearray, decoder_name: str = "raw", *args: Any
+    ) -> None:
         """
         Loads this image with pixel data from a bytes object.
 
@@ -835,16 +850,17 @@ class Image:
         if self.width == 0 or self.height == 0:
             return
 
-        # may pass tuple instead of argument list
-        if len(args) == 1 and isinstance(args[0], tuple):
-            args = args[0]
+        decoder_args: Any = args
+        if len(decoder_args) == 1 and isinstance(decoder_args[0], tuple):
+            # may pass tuple instead of argument list
+            decoder_args = decoder_args[0]
 
         # default format
-        if decoder_name == "raw" and args == ():
-            args = self.mode
+        if decoder_name == "raw" and decoder_args == ():
+            decoder_args = self.mode
 
         # unpack data
-        d = _getdecoder(self.mode, decoder_name, args)
+        d = _getdecoder(self.mode, decoder_name, decoder_args)
         d.setimage(self.im)
         s = d.decode(data)
 
@@ -873,7 +889,7 @@ class Image:
         if self.im is not None and self.palette and self.palette.dirty:
             # realize palette
             mode, arr = self.palette.getdata()
-            self.im.putpalette(mode, arr)
+            self.im.putpalette(self.palette.mode, mode, arr)
             self.palette.dirty = 0
             self.palette.rawmode = None
             if "transparency" in self.info and mode in ("LA", "PA"):
@@ -883,9 +899,9 @@ class Image:
                     self.im.putpalettealphas(self.info["transparency"])
                 self.palette.mode = "RGBA"
             else:
-                palette_mode = "RGBA" if mode.startswith("RGBA") else "RGB"
-                self.palette.mode = palette_mode
-                self.palette.palette = self.im.getpalette(palette_mode, palette_mode)
+                self.palette.palette = self.im.getpalette(
+                    self.palette.mode, self.palette.mode
+                )
 
         if self.im is not None:
             if cffi and USE_CFFI_ACCESS:
@@ -988,9 +1004,11 @@ class Image:
             if has_transparency and self.im.bands == 3:
                 transparency = new_im.info["transparency"]
 
-                def convert_transparency(m, v):
-                    v = m[0] * v[0] + m[1] * v[1] + m[2] * v[2] + m[3] * 0.5
-                    return max(0, min(255, int(v)))
+                def convert_transparency(
+                    m: tuple[float, ...], v: tuple[int, int, int]
+                ) -> int:
+                    value = m[0] * v[0] + m[1] * v[1] + m[2] * v[2] + m[3] * 0.5
+                    return max(0, min(255, int(value)))
 
                 if mode == "L":
                     transparency = convert_transparency(matrix, transparency)
@@ -1150,7 +1168,7 @@ class Image:
     def quantize(
         self,
         colors: int = 256,
-        method: Quantize | None = None,
+        method: int | None = None,
         kmeans: int = 0,
         palette=None,
         dither: Dither = Dither.FLOYDSTEINBERG,
@@ -1242,7 +1260,7 @@ class Image:
 
     __copy__ = copy
 
-    def crop(self, box: tuple[int, int, int, int] | None = None) -> Image:
+    def crop(self, box: tuple[float, float, float, float] | None = None) -> Image:
         """
         Returns a rectangular region from this image. The box is a
         4-tuple defining the left, upper, right, and lower pixel
@@ -1268,7 +1286,9 @@ class Image:
         self.load()
         return self._new(self._crop(self.im, box))
 
-    def _crop(self, im, box):
+    def _crop(
+        self, im: core.ImagingCore, box: tuple[float, float, float, float]
+    ) -> core.ImagingCore:
         """
         Returns a rectangular region from the core image object im.
 
@@ -1289,7 +1309,7 @@ class Image:
         return im.crop((x0, y0, x1, y1))
 
     def draft(
-        self, mode: str, size: tuple[int, int]
+        self, mode: str | None, size: tuple[int, int] | None
     ) -> tuple[str, tuple[int, int, float, float]] | None:
         """
         Configures the image file loader so it returns a version of the
@@ -1359,7 +1379,7 @@ class Image:
         """
         return ImageMode.getmode(self.mode).bands
 
-    def getbbox(self, *, alpha_only: bool = True) -> tuple[int, int, int, int]:
+    def getbbox(self, *, alpha_only: bool = True) -> tuple[int, int, int, int] | None:
         """
         Calculates the bounding box of the non-zero regions in the
         image.
@@ -1439,8 +1459,15 @@ class Image:
             return tuple(self.im.getband(i).getextrema() for i in range(self.im.bands))
         return self.im.getextrema()
 
-    def _getxmp(self, xmp_tags):
-        def get_name(tag):
+    def getxmp(self):
+        """
+        Returns a dictionary containing the XMP tags.
+        Requires defusedxml to be installed.
+
+        :returns: XMP tags in a dictionary.
+        """
+
+        def get_name(tag: str) -> str:
             return re.sub("^{[^}]+}", "", tag)
 
         def get_value(element):
@@ -1466,9 +1493,10 @@ class Image:
         if ElementTree is None:
             warnings.warn("XMP data cannot be read without defusedxml dependency")
             return {}
-        else:
-            root = ElementTree.fromstring(xmp_tags)
-            return {get_name(root.tag): get_value(root)}
+        if "xmp" not in self.info:
+            return {}
+        root = ElementTree.fromstring(self.info["xmp"])
+        return {get_name(root.tag): get_value(root)}
 
     def getexif(self) -> Exif:
         """
@@ -1511,7 +1539,7 @@ class Image:
         self._exif._loaded = False
         self.getexif()
 
-    def get_child_images(self):
+    def get_child_images(self) -> list[ImageFile.ImageFile]:
         child_images = []
         exif = self.getexif()
         ifds = []
@@ -1535,16 +1563,17 @@ class Image:
             fp = self.fp
             thumbnail_offset = ifd.get(513)
             if thumbnail_offset is not None:
-                try:
-                    thumbnail_offset += self._exif_offset
-                except AttributeError:
-                    pass
+                thumbnail_offset += getattr(self, "_exif_offset", 0)
                 self.fp.seek(thumbnail_offset)
                 data = self.fp.read(ifd.get(514))
                 fp = io.BytesIO(data)
 
             with open(fp) as im:
-                if thumbnail_offset is None:
+                from . import TiffImagePlugin
+
+                if thumbnail_offset is None and isinstance(
+                    im, TiffImagePlugin.TiffImageFile
+                ):
                     im._frame_pos = [ifd_offset]
                     im._seek(0)
                 im.load()
@@ -1604,7 +1633,7 @@ class Image:
             or "transparency" in self.info
         )
 
-    def apply_transparency(self):
+    def apply_transparency(self) -> None:
         """
         If a P mode image has a "transparency" key in the info dictionary,
         remove the key and instead apply the transparency to the palette.
@@ -1616,6 +1645,7 @@ class Image:
         from . import ImagePalette
 
         palette = self.getpalette("RGBA")
+        assert palette is not None
         transparency = self.info["transparency"]
         if isinstance(transparency, bytes):
             for i, alpha in enumerate(transparency):
@@ -1711,7 +1741,12 @@ class Image:
             return self.im.entropy(extrema)
         return self.im.entropy()
 
-    def paste(self, im, box=None, mask=None) -> None:
+    def paste(
+        self,
+        im: Image | str | float | tuple[float, ...],
+        box: Image | tuple[int, int, int, int] | tuple[int, int] | None = None,
+        mask: Image | None = None,
+    ) -> None:
         """
         Pastes another image into this image. The box argument is either
         a 2-tuple giving the upper left corner, a 4-tuple defining the
@@ -1739,7 +1774,7 @@ class Image:
         See :py:meth:`~PIL.Image.Image.alpha_composite` if you want to
         combine images with respect to their alpha channels.
 
-        :param im: Source image or pixel value (integer or tuple).
+        :param im: Source image or pixel value (integer, float or tuple).
         :param box: An optional 4-tuple giving the region to paste into.
            If a 2-tuple is used instead, it's treated as the upper left
            corner.  If omitted or None, the source is pasted into the
@@ -1751,10 +1786,14 @@ class Image:
         :param mask: An optional mask image.
         """
 
-        if isImageType(box) and mask is None:
+        if isImageType(box):
+            if mask is not None:
+                msg = "If using second argument as mask, third argument must be None"
+                raise ValueError(msg)
             # abbreviated paste(im, mask) syntax
             mask = box
             box = None
+        assert not isinstance(box, Image)
 
         if box is None:
             box = (0, 0)
@@ -1792,7 +1831,9 @@ class Image:
         else:
             self.im.paste(im, box)
 
-    def alpha_composite(self, im, dest=(0, 0), source=(0, 0)):
+    def alpha_composite(
+        self, im: Image, dest: Sequence[int] = (0, 0), source: Sequence[int] = (0, 0)
+    ) -> None:
         """'In-place' analog of Image.alpha_composite. Composites an image
         onto this image.
 
@@ -1807,32 +1848,35 @@ class Image:
         """
 
         if not isinstance(source, (list, tuple)):
-            msg = "Source must be a tuple"
+            msg = "Source must be a list or tuple"
             raise ValueError(msg)
         if not isinstance(dest, (list, tuple)):
-            msg = "Destination must be a tuple"
+            msg = "Destination must be a list or tuple"
             raise ValueError(msg)
-        if len(source) not in (2, 4):
-            msg = "Source must be a 2 or 4-tuple"
+
+        if len(source) == 4:
+            overlay_crop_box = tuple(source)
+        elif len(source) == 2:
+            overlay_crop_box = tuple(source) + im.size
+        else:
+            msg = "Source must be a sequence of length 2 or 4"
             raise ValueError(msg)
+
         if not len(dest) == 2:
-            msg = "Destination must be a 2-tuple"
+            msg = "Destination must be a sequence of length 2"
             raise ValueError(msg)
         if min(source) < 0:
             msg = "Source must be non-negative"
             raise ValueError(msg)
 
-        if len(source) == 2:
-            source = source + im.size
-
-        # over image, crop if it's not the whole thing.
-        if source == (0, 0) + im.size:
+        # over image, crop if it's not the whole image.
+        if overlay_crop_box == (0, 0) + im.size:
             overlay = im
         else:
-            overlay = im.crop(source)
+            overlay = im.crop(overlay_crop_box)
 
         # target for the paste
-        box = dest + (dest[0] + overlay.width, dest[1] + overlay.height)
+        box = tuple(dest) + (dest[0] + overlay.width, dest[1] + overlay.height)
 
         # destination image. don't copy if we're using the whole image.
         if box == (0, 0) + self.size:
@@ -1843,7 +1887,11 @@ class Image:
         result = alpha_composite(background, overlay)
         self.paste(result, box)
 
-    def point(self, lut, mode: str | None = None) -> Image:
+    def point(
+        self,
+        lut: Sequence[float] | Callable[[int], float] | ImagePointHandler,
+        mode: str | None = None,
+    ) -> Image:
         """
         Maps this image through a lookup table or function.
 
@@ -1880,7 +1928,9 @@ class Image:
                 scale, offset = _getscaleoffset(lut)
                 return self._new(self.im.point_transform(scale, offset))
             # for other modes, convert the function to a table
-            lut = [lut(i) for i in range(256)] * self.im.bands
+            flatLut = [lut(i) for i in range(256)] * self.im.bands
+        else:
+            flatLut = lut
 
         if self.mode == "F":
             # FIXME: _imaging returns a confusing error message for this case
@@ -1888,8 +1938,8 @@ class Image:
             raise ValueError(msg)
 
         if mode != "F":
-            lut = [round(i) for i in lut]
-        return self._new(self.im.point(lut, mode))
+            flatLut = [round(i) for i in flatLut]
+        return self._new(self.im.point(flatLut, mode))
 
     def putalpha(self, alpha):
         """
@@ -1948,7 +1998,12 @@ class Image:
 
         self.im.putband(alpha.im, band)
 
-    def putdata(self, data, scale=1.0, offset=0.0):
+    def putdata(
+        self,
+        data: Sequence[float] | Sequence[Sequence[int]],
+        scale: float = 1.0,
+        offset: float = 0.0,
+    ) -> None:
         """
         Copies pixel data from a flattened sequence object into the image. The
         values should start at the upper left corner (0, 0), continue to the
@@ -1998,7 +2053,7 @@ class Image:
             palette = ImagePalette.raw(rawmode, data)
         self._mode = "PA" if "A" in self.mode else "P"
         self.palette = palette
-        self.palette.mode = "RGB"
+        self.palette.mode = "RGBA" if "A" in rawmode else "RGB"
         self.load()  # install new palette
 
     def putpixel(self, xy, value):
@@ -2113,7 +2168,7 @@ class Image:
         # m_im.putpalette(mapping_palette, 'L')  # converts to 'P'
         # or just force it.
         # UNDONE -- this is part of the general issue with palettes
-        m_im.im.putpalette(palette_mode + ";L", m_im.palette.tobytes())
+        m_im.im.putpalette(palette_mode, palette_mode + ";L", m_im.palette.tobytes())
 
         m_im = m_im.convert("L")
 
@@ -2146,7 +2201,13 @@ class Image:
             min(self.size[1], math.ceil(box[3] + support_y)),
         )
 
-    def resize(self, size, resample=None, box=None, reducing_gap=None) -> Image:
+    def resize(
+        self,
+        size: tuple[int, int],
+        resample: int | None = None,
+        box: tuple[float, float, float, float] | None = None,
+        reducing_gap: float | None = None,
+    ) -> Image:
         """
         Returns a resized copy of this image.
 
@@ -2211,13 +2272,9 @@ class Image:
             msg = "reducing_gap must be 1.0 or greater"
             raise ValueError(msg)
 
-        size = tuple(size)
-
         self.load()
         if box is None:
             box = (0, 0) + self.size
-        else:
-            box = tuple(box)
 
         if self.size == size and box == (0, 0) + self.size:
             return self.copy()
@@ -2252,7 +2309,11 @@ class Image:
 
         return self._new(self.im.resize(size, resample, box))
 
-    def reduce(self, factor, box=None):
+    def reduce(
+        self,
+        factor: int | tuple[int, int],
+        box: tuple[int, int, int, int] | None = None,
+    ) -> Image:
         """
         Returns a copy of the image reduced ``factor`` times.
         If the size of the image is not dividable by ``factor``,
@@ -2270,8 +2331,6 @@ class Image:
 
         if box is None:
             box = (0, 0) + self.size
-        else:
-            box = tuple(box)
 
         if factor == (1, 1) and box == (0, 0) + self.size:
             return self.copy()
@@ -2287,13 +2346,13 @@ class Image:
 
     def rotate(
         self,
-        angle,
-        resample=Resampling.NEAREST,
-        expand=0,
-        center=None,
-        translate=None,
-        fillcolor=None,
-    ):
+        angle: float,
+        resample: Resampling = Resampling.NEAREST,
+        expand: int | bool = False,
+        center: tuple[int, int] | None = None,
+        translate: tuple[int, int] | None = None,
+        fillcolor: float | tuple[float, ...] | str | None = None,
+    ) -> Image:
         """
         Returns a rotated copy of this image.  This method returns a
         copy of this image, rotated the given number of degrees counter
@@ -2455,7 +2514,7 @@ class Image:
 
         save_all = params.pop("save_all", False)
         self.encoderinfo = params
-        self.encoderconfig = ()
+        self.encoderconfig: tuple[Any, ...] = ()
 
         preinit()
 
@@ -2600,7 +2659,12 @@ class Image:
         """
         return 0
 
-    def thumbnail(self, size, resample=Resampling.BICUBIC, reducing_gap=2.0):
+    def thumbnail(
+        self,
+        size: tuple[float, float],
+        resample: Resampling = Resampling.BICUBIC,
+        reducing_gap: float | None = 2.0,
+    ) -> None:
         """
         Make this image into a thumbnail.  This method modifies the
         image to contain a thumbnail version of itself, no larger than
@@ -2660,27 +2724,32 @@ class Image:
             return x, y
 
         box = None
+        final_size: tuple[int, int]
         if reducing_gap is not None:
-            size = preserve_aspect_ratio()
-            if size is None:
+            preserved_size = preserve_aspect_ratio()
+            if preserved_size is None:
                 return
+            final_size = preserved_size
 
-            res = self.draft(None, (size[0] * reducing_gap, size[1] * reducing_gap))
+            res = self.draft(
+                None, (int(size[0] * reducing_gap), int(size[1] * reducing_gap))
+            )
             if res is not None:
                 box = res[1]
         if box is None:
             self.load()
 
             # load() may have changed the size of the image
-            size = preserve_aspect_ratio()
-            if size is None:
+            preserved_size = preserve_aspect_ratio()
+            if preserved_size is None:
                 return
+            final_size = preserved_size
 
-        if self.size != size:
-            im = self.resize(size, resample, box=box, reducing_gap=reducing_gap)
+        if self.size != final_size:
+            im = self.resize(final_size, resample, box=box, reducing_gap=reducing_gap)
 
             self.im = im.im
-            self._size = size
+            self._size = final_size
             self._mode = self.im.mode
 
         self.readonly = 0
@@ -2690,12 +2759,12 @@ class Image:
     # instead of bloating the method docs, add a separate chapter.
     def transform(
         self,
-        size,
-        method,
-        data=None,
-        resample=Resampling.NEAREST,
-        fill=1,
-        fillcolor=None,
+        size: tuple[int, int],
+        method: Transform | ImageTransformHandler | SupportsGetData,
+        data: Sequence[Any] | None = None,
+        resample: int = Resampling.NEAREST,
+        fill: int = 1,
+        fillcolor: float | tuple[float, ...] | str | None = None,
     ) -> Image:
         """
         Transforms this image.  This method creates a new image with the
@@ -2859,7 +2928,7 @@ class Image:
         if image.mode in ("1", "P"):
             resample = Resampling.NEAREST
 
-        self.im.transform2(box, image.im, method, data, resample, fill)
+        self.im.transform(box, image.im, method, data, resample, fill)
 
     def transpose(self, method: Transpose) -> Image:
         """
@@ -2875,7 +2944,7 @@ class Image:
         self.load()
         return self._new(self.im.transpose(method))
 
-    def effect_spread(self, distance):
+    def effect_spread(self, distance: int) -> Image:
         """
         Randomly spread pixels in an image.
 
@@ -2929,7 +2998,7 @@ class ImageTransformHandler:
         self,
         size: tuple[int, int],
         image: Image,
-        **options: dict[str, str | int | tuple[int, ...] | list[int]],
+        **options: Any,
     ) -> Image:
         pass
 
@@ -2941,35 +3010,35 @@ class ImageTransformHandler:
 # Debugging
 
 
-def _wedge():
+def _wedge() -> Image:
     """Create grayscale wedge (for debugging only)"""
 
     return Image()._new(core.wedge("L"))
 
 
-def _check_size(size):
+def _check_size(size: Any) -> None:
     """
     Common check to enforce type and sanity check on size tuples
 
     :param size: Should be a 2 tuple of (width, height)
-    :returns: True, or raises a ValueError
+    :returns: None, or raises a ValueError
     """
 
     if not isinstance(size, (list, tuple)):
-        msg = "Size must be a tuple"
+        msg = "Size must be a list or tuple"
         raise ValueError(msg)
     if len(size) != 2:
-        msg = "Size must be a tuple of length 2"
+        msg = "Size must be a sequence of length 2"
         raise ValueError(msg)
     if size[0] < 0 or size[1] < 0:
         msg = "Width and height must be >= 0"
         raise ValueError(msg)
 
-    return True
-
 
 def new(
-    mode: str, size: tuple[int, int], color: float | tuple[float, ...] | str | None = 0
+    mode: str,
+    size: tuple[int, int] | list[int],
+    color: float | tuple[float, ...] | str | None = 0,
 ) -> Image:
     """
     Creates a new image with the given mode and size.
@@ -3003,16 +3072,28 @@ def new(
         color = ImageColor.getcolor(color, mode)
 
     im = Image()
-    if mode == "P" and isinstance(color, (list, tuple)) and len(color) in [3, 4]:
-        # RGB or RGBA value for a P image
-        from . import ImagePalette
+    if (
+        mode == "P"
+        and isinstance(color, (list, tuple))
+        and all(isinstance(i, int) for i in color)
+    ):
+        color_ints: tuple[int, ...] = cast(Tuple[int, ...], tuple(color))
+        if len(color_ints) == 3 or len(color_ints) == 4:
+            # RGB or RGBA value for a P image
+            from . import ImagePalette
 
-        im.palette = ImagePalette.ImagePalette()
-        color = im.palette.getcolor(color)
+            im.palette = ImagePalette.ImagePalette()
+            color = im.palette.getcolor(color_ints)
     return im._new(core.fill(mode, size, color))
 
 
-def frombytes(mode, size, data, decoder_name="raw", *args) -> Image:
+def frombytes(
+    mode: str,
+    size: tuple[int, int],
+    data: bytes | bytearray,
+    decoder_name: str = "raw",
+    *args: Any,
+) -> Image:
     """
     Creates a copy of an image memory from pixel data in a buffer.
 
@@ -3040,18 +3121,21 @@ def frombytes(mode, size, data, decoder_name="raw", *args) -> Image:
 
     im = new(mode, size)
     if im.width != 0 and im.height != 0:
-        # may pass tuple instead of argument list
-        if len(args) == 1 and isinstance(args[0], tuple):
-            args = args[0]
+        decoder_args: Any = args
+        if len(decoder_args) == 1 and isinstance(decoder_args[0], tuple):
+            # may pass tuple instead of argument list
+            decoder_args = decoder_args[0]
 
-        if decoder_name == "raw" and args == ():
-            args = mode
+        if decoder_name == "raw" and decoder_args == ():
+            decoder_args = mode
 
-        im.frombytes(data, decoder_name, args)
+        im.frombytes(data, decoder_name, decoder_args)
     return im
 
 
-def frombuffer(mode, size, data, decoder_name="raw", *args) -> Image:
+def frombuffer(
+    mode: str, size: tuple[int, int], data, decoder_name: str = "raw", *args: Any
+) -> Image:
     """
     Creates an image memory referencing pixel data in a byte buffer.
 
@@ -3508,7 +3592,7 @@ def merge(mode: str, bands: Sequence[Image]) -> Image:
 
 
 def register_open(
-    id,
+    id: str,
     factory: Callable[[IO[bytes], str | bytes], ImageFile.ImageFile],
     accept: Callable[[bytes], bool | str] | None = None,
 ) -> None:
@@ -3542,7 +3626,9 @@ def register_mime(id: str, mimetype: str) -> None:
     MIME[id.upper()] = mimetype
 
 
-def register_save(id: str, driver) -> None:
+def register_save(
+    id: str, driver: Callable[[Image, IO[bytes], str | bytes], None]
+) -> None:
     """
     Registers an image save function.  This function should not be
     used in application code.
@@ -3553,7 +3639,9 @@ def register_save(id: str, driver) -> None:
     SAVE[id.upper()] = driver
 
 
-def register_save_all(id, driver) -> None:
+def register_save_all(
+    id: str, driver: Callable[[Image, IO[bytes], str | bytes], None]
+) -> None:
     """
     Registers an image function to save all the frames
     of a multiframe format.  This function should not be
@@ -3565,7 +3653,7 @@ def register_save_all(id, driver) -> None:
     SAVE_ALL[id.upper()] = driver
 
 
-def register_extension(id, extension) -> None:
+def register_extension(id: str, extension: str) -> None:
     """
     Registers an image extension.  This function should not be
     used in application code.
@@ -3576,7 +3664,7 @@ def register_extension(id, extension) -> None:
     EXTENSION[extension.lower()] = id.upper()
 
 
-def register_extensions(id, extensions) -> None:
+def register_extensions(id: str, extensions: list[str]) -> None:
     """
     Registers image extensions.  This function should not be
     used in application code.
@@ -3588,7 +3676,7 @@ def register_extensions(id, extensions) -> None:
         register_extension(id, extension)
 
 
-def registered_extensions():
+def registered_extensions() -> dict[str, str]:
     """
     Returns a dictionary containing all file extensions belonging
     to registered plugins
@@ -3627,7 +3715,7 @@ def register_encoder(name: str, encoder: type[ImageFile.PyEncoder]) -> None:
 # Simple display support.
 
 
-def _show(image, **options) -> None:
+def _show(image: Image, **options: Any) -> None:
     from . import ImageShow
 
     ImageShow.show(image, **options)
@@ -3637,7 +3725,9 @@ def _show(image, **options) -> None:
 # Effects
 
 
-def effect_mandelbrot(size, extent, quality):
+def effect_mandelbrot(
+    size: tuple[int, int], extent: tuple[float, float, float, float], quality: int
+) -> Image:
     """
     Generate a Mandelbrot set covering the given extent.
 
@@ -3650,7 +3740,7 @@ def effect_mandelbrot(size, extent, quality):
     return Image()._new(core.effect_mandelbrot(size, extent, quality))
 
 
-def effect_noise(size, sigma):
+def effect_noise(size: tuple[int, int], sigma: float) -> Image:
     """
     Generate Gaussian noise centered around 128.
 
@@ -3661,7 +3751,7 @@ def effect_noise(size, sigma):
     return Image()._new(core.effect_noise(size, sigma))
 
 
-def linear_gradient(mode):
+def linear_gradient(mode: str) -> Image:
     """
     Generate 256x256 linear gradient from black to white, top to bottom.
 
@@ -3670,7 +3760,7 @@ def linear_gradient(mode):
     return Image()._new(core.linear_gradient(mode))
 
 
-def radial_gradient(mode):
+def radial_gradient(mode: str) -> Image:
     """
     Generate 256x256 radial gradient from black to white, centre to edge.
 
@@ -3683,19 +3773,18 @@ def radial_gradient(mode):
 # Resources
 
 
-def _apply_env_variables(env=None) -> None:
-    if env is None:
-        env = os.environ
+def _apply_env_variables(env: dict[str, str] | None = None) -> None:
+    env_dict = env if env is not None else os.environ
 
     for var_name, setter in [
         ("PILLOW_ALIGNMENT", core.set_alignment),
         ("PILLOW_BLOCK_SIZE", core.set_block_size),
         ("PILLOW_BLOCKS_MAX", core.set_blocks_max),
     ]:
-        if var_name not in env:
+        if var_name not in env_dict:
             continue
 
-        var = env[var_name].lower()
+        var = env_dict[var_name].lower()
 
         units = 1
         for postfix, mul in [("k", 1024), ("m", 1024 * 1024)]:
@@ -3704,13 +3793,13 @@ def _apply_env_variables(env=None) -> None:
                 var = var[: -len(postfix)]
 
         try:
-            var = int(var) * units
+            var_int = int(var) * units
         except ValueError:
             warnings.warn(f"{var_name} is not int")
             continue
 
         try:
-            setter(var)
+            setter(var_int)
         except ValueError as e:
             warnings.warn(f"{var_name}: {e}")
 

src/PIL/ImageCms.py

@@ -754,7 +754,7 @@ def applyTransform(
 
 
 def createProfile(
-    colorSpace: Literal["LAB", "XYZ", "sRGB"], colorTemp: SupportsFloat = -1
+    colorSpace: Literal["LAB", "XYZ", "sRGB"], colorTemp: SupportsFloat = 0
 ) -> core.CmsProfile:
     """
     (pyCMS) Creates a profile.
@@ -777,7 +777,7 @@ def createProfile(
     :param colorSpace: String, the color space of the profile you wish to
         create.
         Currently only "LAB", "XYZ", and "sRGB" are supported.
-    :param colorTemp: Positive integer for the white point for the profile, in
+    :param colorTemp: Positive number for the white point for the profile, in
         degrees Kelvin (i.e. 5000, 6500, 9600, etc.).  The default is for D50
         illuminant if omitted (5000k).  colorTemp is ONLY applied to LAB
         profiles, and is ignored for XYZ and sRGB.
@@ -1089,7 +1089,7 @@ def isIntentSupported(
         raise PyCMSError(v) from v
 
 
-def versions() -> tuple[str, str, str, str]:
+def versions() -> tuple[str, str | None, str, str]:
     """
     (pyCMS) Fetches versions.
     """

src/PIL/ImageColor.py

@@ -25,7 +25,7 @@ from . import Image
 
 
 @lru_cache
-def getrgb(color):
+def getrgb(color: str) -> tuple[int, int, int] | tuple[int, int, int, int]:
     """
      Convert a color string to an RGB or RGBA tuple. If the string cannot be
      parsed, this function raises a :py:exc:`ValueError` exception.
@@ -44,8 +44,10 @@ def getrgb(color):
     if rgb:
         if isinstance(rgb, tuple):
             return rgb
-        colormap[color] = rgb = getrgb(rgb)
-        return rgb
+        rgb_tuple = getrgb(rgb)
+        assert len(rgb_tuple) == 3
+        colormap[color] = rgb_tuple
+        return rgb_tuple
 
     # check for known string formats
     if re.match("#[a-f0-9]{3}$", color):
@@ -88,15 +90,15 @@ def getrgb(color):
     if m:
         from colorsys import hls_to_rgb
 
-        rgb = hls_to_rgb(
+        rgb_floats = hls_to_rgb(
             float(m.group(1)) / 360.0,
             float(m.group(3)) / 100.0,
             float(m.group(2)) / 100.0,
         )
         return (
-            int(rgb[0] * 255 + 0.5),
-            int(rgb[1] * 255 + 0.5),
-            int(rgb[2] * 255 + 0.5),
+            int(rgb_floats[0] * 255 + 0.5),
+            int(rgb_floats[1] * 255 + 0.5),
+            int(rgb_floats[2] * 255 + 0.5),
         )
 
     m = re.match(
@@ -105,15 +107,15 @@ def getrgb(color):
     if m:
         from colorsys import hsv_to_rgb
 
-        rgb = hsv_to_rgb(
+        rgb_floats = hsv_to_rgb(
             float(m.group(1)) / 360.0,
             float(m.group(2)) / 100.0,
             float(m.group(3)) / 100.0,
         )
         return (
-            int(rgb[0] * 255 + 0.5),
-            int(rgb[1] * 255 + 0.5),
-            int(rgb[2] * 255 + 0.5),
+            int(rgb_floats[0] * 255 + 0.5),
+            int(rgb_floats[1] * 255 + 0.5),
+            int(rgb_floats[2] * 255 + 0.5),
         )
 
     m = re.match(r"rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$", color)
@@ -124,7 +126,7 @@ def getrgb(color):
 
 
 @lru_cache
-def getcolor(color, mode: str) -> tuple[int, ...]:
+def getcolor(color: str, mode: str) -> int | tuple[int, ...]:
     """
     Same as :py:func:`~PIL.ImageColor.getrgb` for most modes. However, if
     ``mode`` is HSV, converts the RGB value to a HSV value, or if ``mode`` is
@@ -136,33 +138,34 @@ def getcolor(color, mode: str) -> tuple[int, ...]:
 
     :param color: A color string
     :param mode: Convert result to this mode
-    :return: ``(graylevel[, alpha]) or (red, green, blue[, alpha])``
+    :return: ``graylevel, (graylevel, alpha) or (red, green, blue[, alpha])``
     """
     # same as getrgb, but converts the result to the given mode
-    color, alpha = getrgb(color), 255
-    if len(color) == 4:
-        color, alpha = color[:3], color[3]
+    rgb, alpha = getrgb(color), 255
+    if len(rgb) == 4:
+        alpha = rgb[3]
+        rgb = rgb[:3]
 
     if mode == "HSV":
         from colorsys import rgb_to_hsv
 
-        r, g, b = color
+        r, g, b = rgb
         h, s, v = rgb_to_hsv(r / 255, g / 255, b / 255)
         return int(h * 255), int(s * 255), int(v * 255)
     elif Image.getmodebase(mode) == "L":
-        r, g, b = color
+        r, g, b = rgb
         # ITU-R Recommendation 601-2 for nonlinear RGB
         # scaled to 24 bits to match the convert's implementation.
-        color = (r * 19595 + g * 38470 + b * 7471 + 0x8000) >> 16
+        graylevel = (r * 19595 + g * 38470 + b * 7471 + 0x8000) >> 16
         if mode[-1] == "A":
-            return color, alpha
-    else:
-        if mode[-1] == "A":
-            return color + (alpha,)
-    return color
+            return graylevel, alpha
+        return graylevel
+    elif mode[-1] == "A":
+        return rgb + (alpha,)
+    return rgb
 
 
-colormap = {
+colormap: dict[str, str | tuple[int, int, int]] = {
     # X11 colour table from https://drafts.csswg.org/css-color-4/, with
     # gray/grey spelling issues fixed.  This is a superset of HTML 4.0
     # colour names used in CSS 1.

src/PIL/ImageDraw.py

@@ -34,11 +34,25 @@ from __future__ import annotations
 import math
 import numbers
 import struct
-from typing import TYPE_CHECKING, Sequence, cast
+from types import ModuleType
+from typing import TYPE_CHECKING, AnyStr, Callable, List, Sequence, Tuple, Union, cast
 
 from . import Image, ImageColor
+from ._deprecate import deprecate
 from ._typing import Coords
 
+# experimental access to the outline API
+Outline: Callable[[], Image.core._Outline] | None
+try:
+    Outline = Image.core.outline
+except AttributeError:
+    Outline = None
+
+if TYPE_CHECKING:
+    from . import ImageDraw2, ImageFont
+
+_Ink = Union[float, Tuple[int, ...], str]
+
 """
 A simple 2D drawing interface for PIL images.
 <p>
@@ -48,7 +62,9 @@ directly.
 
 
 class ImageDraw:
-    font = None
+    font: (
+        ImageFont.ImageFont | ImageFont.FreeTypeFont | ImageFont.TransposedFont | None
+    ) = None
 
     def __init__(self, im: Image.Image, mode: str | None = None) -> None:
         """
@@ -92,10 +108,9 @@ class ImageDraw:
             self.fontmode = "L"  # aliasing is okay for other modes
         self.fill = False
 
-    if TYPE_CHECKING:
-        from . import ImageFont
-
-    def getfont(self) -> ImageFont.FreeTypeFont | ImageFont.ImageFont:
+    def getfont(
+        self,
+    ) -> ImageFont.ImageFont | ImageFont.FreeTypeFont | ImageFont.TransposedFont:
         """
         Get the current default font.
 
@@ -120,43 +135,57 @@ class ImageDraw:
             self.font = ImageFont.load_default()
         return self.font
 
-    def _getfont(self, font_size: float | None):
+    def _getfont(
+        self, font_size: float | None
+    ) -> ImageFont.ImageFont | ImageFont.FreeTypeFont | ImageFont.TransposedFont:
         if font_size is not None:
             from . import ImageFont
 
-            font = ImageFont.load_default(font_size)
+            return ImageFont.load_default(font_size)
         else:
-            font = self.getfont()
-        return font
+            return self.getfont()
 
-    def _getink(self, ink, fill=None) -> tuple[int | None, int | None]:
+    def _getink(
+        self, ink: _Ink | None, fill: _Ink | None = None
+    ) -> tuple[int | None, int | None]:
+        result_ink = None
+        result_fill = None
         if ink is None and fill is None:
             if self.fill:
-                fill = self.ink
+                result_fill = self.ink
             else:
-                ink = self.ink
+                result_ink = self.ink
         else:
             if ink is not None:
                 if isinstance(ink, str):
                     ink = ImageColor.getcolor(ink, self.mode)
                 if self.palette and not isinstance(ink, numbers.Number):
                     ink = self.palette.getcolor(ink, self._image)
-                ink = self.draw.draw_ink(ink)
+                result_ink = self.draw.draw_ink(ink)
             if fill is not None:
                 if isinstance(fill, str):
                     fill = ImageColor.getcolor(fill, self.mode)
                 if self.palette and not isinstance(fill, numbers.Number):
                     fill = self.palette.getcolor(fill, self._image)
-                fill = self.draw.draw_ink(fill)
-        return ink, fill
+                result_fill = self.draw.draw_ink(fill)
+        return result_ink, result_fill
 
-    def arc(self, xy: Coords, start, end, fill=None, width=1) -> None:
+    def arc(
+        self,
+        xy: Coords,
+        start: float,
+        end: float,
+        fill: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
         """Draw an arc."""
         ink, fill = self._getink(fill)
         if ink is not None:
             self.draw.draw_arc(xy, start, end, ink, width)
 
-    def bitmap(self, xy: Sequence[int], bitmap, fill=None) -> None:
+    def bitmap(
+        self, xy: Sequence[int], bitmap: Image.Image, fill: _Ink | None = None
+    ) -> None:
         """Draw a bitmap."""
         bitmap.load()
         ink, fill = self._getink(fill)
@@ -165,23 +194,55 @@ class ImageDraw:
         if ink is not None:
             self.draw.draw_bitmap(xy, bitmap.im, ink)
 
-    def chord(self, xy: Coords, start, end, fill=None, outline=None, width=1) -> None:
+    def chord(
+        self,
+        xy: Coords,
+        start: float,
+        end: float,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
         """Draw a chord."""
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_chord(xy, start, end, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_chord(xy, start, end, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             self.draw.draw_chord(xy, start, end, ink, 0, width)
 
-    def ellipse(self, xy: Coords, fill=None, outline=None, width=1) -> None:
+    def ellipse(
+        self,
+        xy: Coords,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
         """Draw an ellipse."""
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_ellipse(xy, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_ellipse(xy, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             self.draw.draw_ellipse(xy, ink, 0, width)
 
-    def line(self, xy: Coords, fill=None, width=0, joint=None) -> None:
+    def circle(
+        self,
+        xy: Sequence[float],
+        radius: float,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
+        """Draw a circle given center coordinates and a radius."""
+        ellipse_xy = (xy[0] - radius, xy[1] - radius, xy[0] + radius, xy[1] + radius)
+        self.ellipse(ellipse_xy, fill, outline, width)
+
+    def line(
+        self,
+        xy: Coords,
+        fill: _Ink | None = None,
+        width: int = 0,
+        joint: str | None = None,
+    ) -> None:
         """Draw a line, or a connected sequence of line segments."""
         ink = self._getink(fill)[0]
         if ink is not None:
@@ -209,7 +270,9 @@ class ImageDraw:
                         # This is a straight line, so no joint is required
                         continue
 
-                    def coord_at_angle(coord, angle):
+                    def coord_at_angle(
+                        coord: Sequence[float], angle: float
+                    ) -> tuple[float, ...]:
                         x, y = coord
                         angle -= 90
                         distance = width / 2 - 1
@@ -250,37 +313,54 @@ class ImageDraw:
                             ]
                         self.line(gap_coords, fill, width=3)
 
-    def shape(self, shape, fill=None, outline=None) -> None:
+    def shape(
+        self,
+        shape: Image.core._Outline,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+    ) -> None:
         """(Experimental) Draw a shape."""
         shape.close()
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_outline(shape, fill, 1)
-        if ink is not None and ink != fill:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_outline(shape, fill_ink, 1)
+        if ink is not None and ink != fill_ink:
             self.draw.draw_outline(shape, ink, 0)
 
     def pieslice(
-        self, xy: Coords, start, end, fill=None, outline=None, width=1
+        self,
+        xy: Coords,
+        start: float,
+        end: float,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
     ) -> None:
         """Draw a pieslice."""
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_pieslice(xy, start, end, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_pieslice(xy, start, end, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             self.draw.draw_pieslice(xy, start, end, ink, 0, width)
 
-    def point(self, xy: Coords, fill=None) -> None:
+    def point(self, xy: Coords, fill: _Ink | None = None) -> None:
         """Draw one or more individual pixels."""
         ink, fill = self._getink(fill)
         if ink is not None:
             self.draw.draw_points(xy, ink)
 
-    def polygon(self, xy: Coords, fill=None, outline=None, width=1) -> None:
+    def polygon(
+        self,
+        xy: Coords,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
         """Draw a polygon."""
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_polygon(xy, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_polygon(xy, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             if width == 1:
                 self.draw.draw_polygon(xy, ink, 0, width)
             elif self.im is not None:
@@ -306,22 +386,41 @@ class ImageDraw:
                 self.im.paste(im.im, (0, 0) + im.size, mask.im)
 
     def regular_polygon(
-        self, bounding_circle, n_sides, rotation=0, fill=None, outline=None, width=1
+        self,
+        bounding_circle: Sequence[Sequence[float] | float],
+        n_sides: int,
+        rotation: float = 0,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
     ) -> None:
         """Draw a regular polygon."""
         xy = _compute_regular_polygon_vertices(bounding_circle, n_sides, rotation)
         self.polygon(xy, fill, outline, width)
 
-    def rectangle(self, xy: Coords, fill=None, outline=None, width=1) -> None:
+    def rectangle(
+        self,
+        xy: Coords,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+    ) -> None:
         """Draw a rectangle."""
-        ink, fill = self._getink(outline, fill)
-        if fill is not None:
-            self.draw.draw_rectangle(xy, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+        ink, fill_ink = self._getink(outline, fill)
+        if fill_ink is not None:
+            self.draw.draw_rectangle(xy, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             self.draw.draw_rectangle(xy, ink, 0, width)
 
     def rounded_rectangle(
-        self, xy: Coords, radius=0, fill=None, outline=None, width=1, *, corners=None
+        self,
+        xy: Coords,
+        radius: float = 0,
+        fill: _Ink | None = None,
+        outline: _Ink | None = None,
+        width: int = 1,
+        *,
+        corners: tuple[bool, bool, bool, bool] | None = None,
     ) -> None:
         """Draw a rounded rectangle."""
         if isinstance(xy[0], (list, tuple)):
@@ -363,10 +462,10 @@ class ImageDraw:
             # that is a rectangle
             return self.rectangle(xy, fill, outline, width)
 
-        r = d // 2
-        ink, fill = self._getink(outline, fill)
+        r = int(d // 2)
+        ink, fill_ink = self._getink(outline, fill)
 
-        def draw_corners(pieslice) -> None:
+        def draw_corners(pieslice: bool) -> None:
             parts: tuple[tuple[tuple[float, float, float, float], int, int], ...]
             if full_x:
                 # Draw top and bottom halves
@@ -396,32 +495,32 @@ class ImageDraw:
                 )
             for part in parts:
                 if pieslice:
-                    self.draw.draw_pieslice(*(part + (fill, 1)))
+                    self.draw.draw_pieslice(*(part + (fill_ink, 1)))
                 else:
                     self.draw.draw_arc(*(part + (ink, width)))
 
-        if fill is not None:
+        if fill_ink is not None:
             draw_corners(True)
 
             if full_x:
-                self.draw.draw_rectangle((x0, y0 + r + 1, x1, y1 - r - 1), fill, 1)
+                self.draw.draw_rectangle((x0, y0 + r + 1, x1, y1 - r - 1), fill_ink, 1)
             else:
-                self.draw.draw_rectangle((x0 + r + 1, y0, x1 - r - 1, y1), fill, 1)
+                self.draw.draw_rectangle((x0 + r + 1, y0, x1 - r - 1, y1), fill_ink, 1)
             if not full_x and not full_y:
                 left = [x0, y0, x0 + r, y1]
                 if corners[0]:
                     left[1] += r + 1
                 if corners[3]:
                     left[3] -= r + 1
-                self.draw.draw_rectangle(left, fill, 1)
+                self.draw.draw_rectangle(left, fill_ink, 1)
 
                 right = [x1 - r, y0, x1, y1]
                 if corners[1]:
                     right[1] += r + 1
                 if corners[2]:
                     right[3] -= r + 1
-                self.draw.draw_rectangle(right, fill, 1)
-        if ink is not None and ink != fill and width != 0:
+                self.draw.draw_rectangle(right, fill_ink, 1)
+        if ink is not None and ink != fill_ink and width != 0:
             draw_corners(False)
 
             if not full_x:
@@ -453,15 +552,13 @@ class ImageDraw:
                     right[3] -= r + 1
                 self.draw.draw_rectangle(right, ink, 1)
 
-    def _multiline_check(self, text) -> bool:
+    def _multiline_check(self, text: AnyStr) -> bool:
         split_character = "\n" if isinstance(text, str) else b"\n"
 
         return split_character in text
 
-    def _multiline_split(self, text) -> list[str | bytes]:
-        split_character = "\n" if isinstance(text, str) else b"\n"
-
-        return text.split(split_character)
+    def _multiline_split(self, text: AnyStr) -> list[AnyStr]:
+        return text.split("\n" if isinstance(text, str) else b"\n")
 
     def _multiline_spacing(self, font, spacing, stroke_width):
         return (
@@ -472,10 +569,15 @@ class ImageDraw:
 
     def text(
         self,
-        xy,
-        text,
+        xy: tuple[float, float],
+        text: str,
         fill=None,
-        font=None,
+        font: (
+            ImageFont.ImageFont
+            | ImageFont.FreeTypeFont
+            | ImageFont.TransposedFont
+            | None
+        ) = None,
         anchor=None,
         spacing=4,
         align="left",
@@ -513,10 +615,11 @@ class ImageDraw:
                 embedded_color,
             )
 
-        def getink(fill):
-            ink, fill = self._getink(fill)
+        def getink(fill: _Ink | None) -> int:
+            ink, fill_ink = self._getink(fill)
             if ink is None:
-                return fill
+                assert fill_ink is not None
+                return fill_ink
             return ink
 
         def draw_text(ink, stroke_width=0, stroke_offset=None) -> None:
@@ -529,7 +632,7 @@ class ImageDraw:
                 coord.append(int(xy[i]))
                 start.append(math.modf(xy[i])[0])
             try:
-                mask, offset = font.getmask2(
+                mask, offset = font.getmask2(  # type: ignore[union-attr,misc]
                     text,
                     mode,
                     direction=direction,
@@ -545,7 +648,7 @@ class ImageDraw:
                 coord = [coord[0] + offset[0], coord[1] + offset[1]]
             except AttributeError:
                 try:
-                    mask = font.getmask(
+                    mask = font.getmask(  # type: ignore[misc]
                         text,
                         mode,
                         direction,
@@ -594,10 +697,15 @@ class ImageDraw:
 
     def multiline_text(
         self,
-        xy,
-        text,
+        xy: tuple[float, float],
+        text: str,
         fill=None,
-        font=None,
+        font: (
+            ImageFont.ImageFont
+            | ImageFont.FreeTypeFont
+            | ImageFont.TransposedFont
+            | None
+        ) = None,
         anchor=None,
         spacing=4,
         align="left",
@@ -627,7 +735,7 @@ class ImageDraw:
             font = self._getfont(font_size)
 
         widths = []
-        max_width = 0
+        max_width: float = 0
         lines = self._multiline_split(text)
         line_spacing = self._multiline_spacing(font, spacing, stroke_width)
         for line in lines:
@@ -681,15 +789,20 @@ class ImageDraw:
 
     def textlength(
         self,
-        text,
-        font=None,
+        text: str,
+        font: (
+            ImageFont.ImageFont
+            | ImageFont.FreeTypeFont
+            | ImageFont.TransposedFont
+            | None
+        ) = None,
         direction=None,
         features=None,
         language=None,
         embedded_color=False,
         *,
         font_size=None,
-    ):
+    ) -> float:
         """Get the length of a given string, in pixels with 1/64 precision."""
         if self._multiline_check(text):
             msg = "can't measure length of multiline text"
@@ -781,7 +894,7 @@ class ImageDraw:
             font = self._getfont(font_size)
 
         widths = []
-        max_width = 0
+        max_width: float = 0
         lines = self._multiline_split(text)
         line_spacing = self._multiline_spacing(font, spacing, stroke_width)
         for line in lines:
@@ -853,7 +966,7 @@ class ImageDraw:
         return bbox
 
 
-def Draw(im, mode: str | None = None) -> ImageDraw:
+def Draw(im: Image.Image, mode: str | None = None) -> ImageDraw:
     """
     A simple 2D drawing interface for PIL images.
 
@@ -865,43 +978,34 @@ def Draw(im, mode: str | None = None) -> ImageDraw:
        defaults to the mode of the image.
     """
     try:
-        return im.getdraw(mode)
+        return getattr(im, "getdraw")(mode)
     except AttributeError:
         return ImageDraw(im, mode)
 
 
-# experimental access to the outline API
-try:
-    Outline = Image.core.outline
-except AttributeError:
-    Outline = None
-
-
-def getdraw(im=None, hints=None):
+def getdraw(
+    im: Image.Image | None = None, hints: list[str] | None = None
+) -> tuple[ImageDraw2.Draw | None, ModuleType]:
     """
-    (Experimental) A more advanced 2D drawing interface for PIL images,
-    based on the WCK interface.
-
     :param im: The image to draw in.
-    :param hints: An optional list of hints.
+    :param hints: An optional list of hints. Deprecated.
     :returns: A (drawing context, drawing resource factory) tuple.
     """
-    # FIXME: this needs more work!
-    # FIXME: come up with a better 'hints' scheme.
-    handler = None
-    if not hints or "nicest" in hints:
-        try:
-            from . import _imagingagg as handler
-        except ImportError:
-            pass
-    if handler is None:
-        from . import ImageDraw2 as handler
-    if im:
-        im = handler.Draw(im)
-    return im, handler
+    if hints is not None:
+        deprecate("'hints' parameter", 12)
+    from . import ImageDraw2
+
+    draw = ImageDraw2.Draw(im) if im is not None else None
+    return draw, ImageDraw2
 
 
-def floodfill(image: Image.Image, xy, value, border=None, thresh=0) -> None:
+def floodfill(
+    image: Image.Image,
+    xy: tuple[int, int],
+    value: float | tuple[int, ...],
+    border: float | tuple[int, ...] | None = None,
+    thresh: float = 0,
+) -> None:
     """
     (experimental) Fills a bounded region with a given color.
 
@@ -958,12 +1062,12 @@ def floodfill(image: Image.Image, xy, value, border=None, thresh=0) -> None:
 
 
 def _compute_regular_polygon_vertices(
-    bounding_circle, n_sides, rotation
+    bounding_circle: Sequence[Sequence[float] | float], n_sides: int, rotation: float
 ) -> list[tuple[float, float]]:
     """
     Generate a list of vertices for a 2D regular polygon.
 
-    :param bounding_circle: The bounding circle is a tuple defined
+    :param bounding_circle: The bounding circle is a sequence defined
         by a point and radius. The polygon is inscribed in this circle.
         (e.g. ``bounding_circle=(x, y, r)`` or ``((x, y), r)``)
     :param n_sides: Number of sides
@@ -1001,7 +1105,7 @@ def _compute_regular_polygon_vertices(
     # 1. Error Handling
     # 1.1 Check `n_sides` has an appropriate value
     if not isinstance(n_sides, int):
-        msg = "n_sides should be an int"
+        msg = "n_sides should be an int"  # type: ignore[unreachable]
         raise TypeError(msg)
     if n_sides < 3:
         msg = "n_sides should be an int > 2"
@@ -1013,9 +1117,24 @@ def _compute_regular_polygon_vertices(
         raise TypeError(msg)
 
     if len(bounding_circle) == 3:
-        *centroid, polygon_radius = bounding_circle
-    elif len(bounding_circle) == 2:
-        centroid, polygon_radius = bounding_circle
+        if not all(isinstance(i, (int, float)) for i in bounding_circle):
+            msg = "bounding_circle should only contain numeric data"
+            raise ValueError(msg)
+
+        *centroid, polygon_radius = cast(List[float], list(bounding_circle))
+    elif len(bounding_circle) == 2 and isinstance(bounding_circle[0], (list, tuple)):
+        if not all(
+            isinstance(i, (int, float)) for i in bounding_circle[0]
+        ) or not isinstance(bounding_circle[1], (int, float)):
+            msg = "bounding_circle should only contain numeric data"
+            raise ValueError(msg)
+
+        if len(bounding_circle[0]) != 2:
+            msg = "bounding_circle centre should contain 2D coordinates (e.g. (x, y))"
+            raise ValueError(msg)
+
+        centroid = cast(List[float], list(bounding_circle[0]))
+        polygon_radius = cast(float, bounding_circle[1])
     else:
         msg = (
             "bounding_circle should contain 2D coordinates "
@@ -1023,25 +1142,17 @@ def _compute_regular_polygon_vertices(
         )
         raise ValueError(msg)
 
-    if not all(isinstance(i, (int, float)) for i in (*centroid, polygon_radius)):
-        msg = "bounding_circle should only contain numeric data"
-        raise ValueError(msg)
-
-    if not len(centroid) == 2:
-        msg = "bounding_circle centre should contain 2D coordinates (e.g. (x, y))"
-        raise ValueError(msg)
-
     if polygon_radius <= 0:
         msg = "bounding_circle radius should be > 0"
         raise ValueError(msg)
 
     # 1.3 Check `rotation` has an appropriate value
     if not isinstance(rotation, (int, float)):
-        msg = "rotation should be an int or float"
+        msg = "rotation should be an int or float"  # type: ignore[unreachable]
         raise ValueError(msg)
 
     # 2. Define Helper Functions
-    def _apply_rotation(point: list[float], degrees: float) -> tuple[int, int]:
+    def _apply_rotation(point: list[float], degrees: float) -> tuple[float, float]:
         return (
             round(
                 point[0] * math.cos(math.radians(360 - degrees))
@@ -1057,7 +1168,7 @@ def _compute_regular_polygon_vertices(
             ),
         )
 
-    def _compute_polygon_vertex(angle: float) -> tuple[int, int]:
+    def _compute_polygon_vertex(angle: float) -> tuple[float, float]:
         start_point = [polygon_radius, 0]
         return _apply_rotation(start_point, angle)
 
@@ -1080,11 +1191,13 @@ def _compute_regular_polygon_vertices(
     return [_compute_polygon_vertex(angle) for angle in angles]
 
 
-def _color_diff(color1, color2: float | tuple[int, ...]) -> float:
+def _color_diff(
+    color1: float | tuple[int, ...], color2: float | tuple[int, ...]
+) -> float:
     """
     Uses 1-norm distance to calculate difference between two values.
     """
-    if isinstance(color2, tuple):
-        return sum(abs(color1[i] - color2[i]) for i in range(0, len(color2)))
-    else:
-        return abs(color1 - color2)
+    first = color1 if isinstance(color1, tuple) else (color1,)
+    second = color2 if isinstance(color2, tuple) else (color2,)
+
+    return sum(abs(first[i] - second[i]) for i in range(0, len(second)))

src/PIL/ImageDraw2.py

@@ -30,7 +30,7 @@ from . import Image, ImageColor, ImageDraw, ImageFont, ImagePath
 class Pen:
     """Stores an outline color and width."""
 
-    def __init__(self, color, width=1, opacity=255):
+    def __init__(self, color: str, width: int = 1, opacity: int = 255) -> None:
         self.color = ImageColor.getrgb(color)
         self.width = width
 
@@ -38,7 +38,7 @@ class Pen:
 class Brush:
     """Stores a fill color"""
 
-    def __init__(self, color, opacity=255):
+    def __init__(self, color: str, opacity: int = 255) -> None:
         self.color = ImageColor.getrgb(color)
 
 
@@ -63,7 +63,7 @@ class Draw:
         self.image = image
         self.transform = None
 
-    def flush(self):
+    def flush(self) -> Image.Image:
         return self.image
 
     def render(self, op, xy, pen, brush=None):

src/PIL/ImageEnhance.py

@@ -23,7 +23,10 @@ from . import Image, ImageFilter, ImageStat
 
 
 class _Enhance:
-    def enhance(self, factor):
+    image: Image.Image
+    degenerate: Image.Image
+
+    def enhance(self, factor: float) -> Image.Image:
         """
         Returns an enhanced image.
 
@@ -46,7 +49,7 @@ class Color(_Enhance):
     the original image.
     """
 
-    def __init__(self, image):
+    def __init__(self, image: Image.Image) -> None:
         self.image = image
         self.intermediate_mode = "L"
         if "A" in image.getbands():
@@ -63,7 +66,7 @@ class Contrast(_Enhance):
     gives a solid gray image. A factor of 1.0 gives the original image.
     """
 
-    def __init__(self, image):
+    def __init__(self, image: Image.Image) -> None:
         self.image = image
         mean = int(ImageStat.Stat(image.convert("L")).mean[0] + 0.5)
         self.degenerate = Image.new("L", image.size, mean).convert(image.mode)
@@ -80,7 +83,7 @@ class Brightness(_Enhance):
     original image.
     """
 
-    def __init__(self, image):
+    def __init__(self, image: Image.Image) -> None:
         self.image = image
         self.degenerate = Image.new(image.mode, image.size, 0)
 
@@ -96,7 +99,7 @@ class Sharpness(_Enhance):
     original image, and a factor of 2.0 gives a sharpened image.
     """
 
-    def __init__(self, image):
+    def __init__(self, image: Image.Image) -> None:
         self.image = image
         self.degenerate = image.filter(ImageFilter.SMOOTH)
 

src/PIL/ImageFile.py

@@ -28,6 +28,7 @@
 #
 from __future__ import annotations
 
+import abc
 import io
 import itertools
 import struct
@@ -347,6 +348,15 @@ class ImageFile(Image.Image):
         return self.tell() != frame
 
 
+class StubHandler:
+    def open(self, im: StubImageFile) -> None:
+        pass
+
+    @abc.abstractmethod
+    def load(self, im: StubImageFile) -> Image.Image:
+        pass
+
+
 class StubImageFile(ImageFile):
     """
     Base class for stub image loaders.
@@ -477,7 +487,7 @@ class Parser:
     def __enter__(self):
         return self
 
-    def __exit__(self, *args):
+    def __exit__(self, *args: object) -> None:
         self.close()
 
     def close(self):
@@ -753,7 +763,7 @@ class PyEncoder(PyCodec):
     def pushes_fd(self):
         return self._pushes_fd
 
-    def encode(self, bufsize):
+    def encode(self, bufsize: int) -> tuple[int, int, bytes]:
         """
         Override to perform the encoding process.