Merge branch 'main' into main

.ci/requirements-cibw.txt

@@ -1 +1 @@
-cibuildwheel==2.17.0
+cibuildwheel==2.18.0

.ci/requirements-mypy.txt

@@ -1 +1 @@
-mypy==1.9.0
+mypy==1.10.0

.github/workflows/test-cygwin.yml

@@ -55,6 +55,7 @@ jobs:
           packages: >
             gcc-g++
             ghostscript
+            git
             ImageMagick
             jpeg
             libfreetype-devel
@@ -132,11 +133,12 @@ jobs:
           bash.exe .ci/after_success.sh
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v3.1.5
+        uses: codecov/codecov-action@v4
         with:
           file: ./coverage.xml
           flags: GHA_Cygwin
           name: Cygwin Python 3.${{ matrix.python-minor-version }}
+          token: ${{ secrets.CODECOV_ORG_TOKEN }}
 
   success:
     permissions:

.github/workflows/test-docker.yml

@@ -36,8 +36,8 @@ jobs:
         docker: [
           # Run slower jobs first to give them a headstart and reduce waiting time
           ubuntu-22.04-jammy-arm64v8,
-          ubuntu-22.04-jammy-ppc64le,
+          ubuntu-24.04-noble-ppc64le,
-          ubuntu-22.04-jammy-s390x,
+          ubuntu-24.04-noble-s390x,
           # Then run the remainder
           alpine,
           amazon-2-amd64,
@@ -47,19 +47,20 @@ jobs:
           debian-11-bullseye-amd64,
           debian-12-bookworm-x86,
           debian-12-bookworm-amd64,
-          fedora-38-amd64,
           fedora-39-amd64,
+          fedora-40-amd64,
           gentoo,
           ubuntu-20.04-focal-amd64,
           ubuntu-22.04-jammy-amd64,
+          ubuntu-24.04-noble-amd64,
         ]
         dockerTag: [main]
         include:
           - docker: "ubuntu-22.04-jammy-arm64v8"
             qemu-arch: "aarch64"
-          - docker: "ubuntu-22.04-jammy-ppc64le"
+          - docker: "ubuntu-24.04-noble-ppc64le"
             qemu-arch: "ppc64le"
-          - docker: "ubuntu-22.04-jammy-s390x"
+          - docker: "ubuntu-24.04-noble-s390x"
             qemu-arch: "s390x"
 
     name: ${{ matrix.docker }}
@@ -81,8 +82,8 @@ jobs:
 
     - name: Docker build
       run: |
-        # The Pillow user in the docker container is UID 1000
+        # The Pillow user in the docker container is UID 1001
-        sudo chown -R 1000 $GITHUB_WORKSPACE
+        sudo chown -R 1001 $GITHUB_WORKSPACE
         docker run --name pillow_container  -v $GITHUB_WORKSPACE:/Pillow pythonpillow/${{ matrix.docker }}:${{ matrix.dockerTag }}
         sudo chown -R runner $GITHUB_WORKSPACE
 
@@ -99,11 +100,12 @@ jobs:
         MATRIX_DOCKER: ${{ matrix.docker }}
 
     - name: Upload coverage
-      uses: codecov/codecov-action@v3.1.5
+      uses: codecov/codecov-action@v4
       with:
         flags: GHA_Docker
         name: ${{ matrix.docker }}
         gcov: true
+        token: ${{ secrets.CODECOV_ORG_TOKEN }}
 
   success:
     permissions:

.github/workflows/test-mingw.yml

@@ -85,8 +85,9 @@ jobs:
           python3 -m pytest -vx --cov PIL --cov Tests --cov-report term --cov-report xml Tests
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v3.1.5
+        uses: codecov/codecov-action@v4
         with:
           file: ./coverage.xml
           flags: GHA_Windows
           name: "MSYS2 MinGW"
+          token: ${{ secrets.CODECOV_ORG_TOKEN }}

.github/workflows/test-valgrind.yml

@@ -50,7 +50,7 @@ jobs:
 
     - name: Build and Run Valgrind
       run: |
-        # The Pillow user in the docker container is UID 1000
+        # The Pillow user in the docker container is UID 1001
-        sudo chown -R 1000 $GITHUB_WORKSPACE
+        sudo chown -R 1001 $GITHUB_WORKSPACE
         docker run --name pillow_container -e "PILLOW_VALGRIND_TEST=true" -v $GITHUB_WORKSPACE:/Pillow pythonpillow/${{ matrix.docker }}:${{ matrix.dockerTag }}
         sudo chown -R runner $GITHUB_WORKSPACE

.github/workflows/test-windows.yml

@@ -213,11 +213,12 @@ jobs:
       shell: pwsh
 
     - name: Upload coverage
-      uses: codecov/codecov-action@v3.1.5
+      uses: codecov/codecov-action@v4
       with:
         file: ./coverage.xml
         flags: GHA_Windows
         name: ${{ runner.os }} Python ${{ matrix.python-version }}
+        token: ${{ secrets.CODECOV_ORG_TOKEN }}
 
   success:
     permissions:

.github/workflows/test.yml

@@ -57,9 +57,9 @@ jobs:
         - python-version: "3.10"
           PYTHONOPTIMIZE: 2
         # M1 only available for 3.10+
-        - os: "macos-latest"
+        - os: "macos-13"
           python-version: "3.9"
-        - os: "macos-latest"
+        - os: "macos-13"
           python-version: "3.8"
         exclude:
         - os: "macos-14"
@@ -150,11 +150,12 @@ jobs:
         .ci/after_success.sh
 
     - name: Upload coverage
-      uses: codecov/codecov-action@v3.1.5
+      uses: codecov/codecov-action@v4
       with:
         flags: ${{ matrix.os == 'ubuntu-latest' && 'GHA_Ubuntu' || 'GHA_macOS' }}
         name: ${{ matrix.os }} Python ${{ matrix.python-version }}
         gcov: true
+        token: ${{ secrets.CODECOV_ORG_TOKEN }}
 
   success:
     permissions:

.github/workflows/wheels.yml

@@ -97,7 +97,7 @@ jobs:
       matrix:
         include:
           - name: "macOS x86_64"
-            os: macos-latest
+            os: macos-13
             cibw_arch: x86_64
             macosx_deployment_target: "10.10"
           - name: "macOS arm64"

.pre-commit-config.yaml

@@ -1,12 +1,12 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.3.4
+    rev: v0.4.3
     hooks:
       - id: ruff
         args: [--exit-non-zero-on-fix]
 
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 24.3.0
+    rev: 24.4.2
     hooks:
       - id: black
 
@@ -29,7 +29,7 @@ repos:
       - id: rst-backticks
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.5.0
+    rev: v4.6.0
     hooks:
       - id: check-executables-have-shebangs
       - id: check-shebang-scripts-are-executable
@@ -43,7 +43,7 @@ repos:
         exclude: ^.github/.*TEMPLATE|^Tests/(fonts|images)/
 
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.28.1
+    rev: 0.28.2
     hooks:
       - id: check-github-workflows
       - id: check-readthedocs
@@ -55,7 +55,7 @@ repos:
       - id: sphinx-lint
 
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: 1.7.0
+    rev: 1.8.0
     hooks:
       - id: pyproject-fmt
 

.readthedocs.yml

@@ -6,6 +6,10 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3"
+  jobs:
+    post_checkout:
+    - git remote add upstream https://github.com/python-pillow/Pillow.git # For forks
+    - git fetch upstream --tags
 
 python:
   install:

CHANGES.rst

@@ -5,6 +5,24 @@ Changelog (Pillow)
 10.4.0 (unreleased)
 -------------------
 
+- Deprecate BGR;15, BGR;16 and BGR;24 modes #7978
+  [radarhere, hugovk]
+
+- Fix ImagingAccess for I;16N on big-endian #7921
+  [Yay295, radarhere]
+
+- Support reading P mode TIFF images with padding #7996
+  [radarhere]
+
+- Deprecate support for libtiff < 4 #7998
+  [radarhere, hugovk]
+
+- Corrected ImageShow UnixViewer command #7987
+  [radarhere]
+
+- Use functools.cached_property in ImageStat #7952
+  [nulano, hugovk, radarhere]
+
 - Add support for reading BITMAPV2INFOHEADER and BITMAPV3INFOHEADER #7956
   [Cirras, radarhere]
 

Makefile

@@ -2,7 +2,6 @@
 
 .PHONY: clean
 clean:
-	python3 setup.py clean
 	rm src/PIL/*.so || true
 	rm -r build || true
 	find . -name __pycache__ | xargs rm -r || true

Tests/helper.py

@@ -273,7 +273,18 @@ def _cached_hopper(mode: str) -> Image.Image:
         im = hopper("L")
     else:
         im = hopper()
-    return im.convert(mode)
+    if mode.startswith("BGR;"):
+        with pytest.warns(DeprecationWarning):
+            im = im.convert(mode)
+    else:
+        try:
+            im = im.convert(mode)
+        except ImportError:
+            if mode == "LAB":
+                im = Image.open("Tests/images/hopper.Lab.tif")
+            else:
+                raise
+    return im
 
 
 def djpeg_available() -> bool:

Tests/test_features.py

@@ -37,6 +37,8 @@ def test_version() -> None:
         else:
             assert function(name) == version
             if name != "PIL":
+                if name == "zlib" and version is not None:
+                    version = version.replace(".zlib-ng", "")
                 assert version is None or re.search(r"\d+(\.\d+)*$", version)
 
     for module in features.modules:

Tests/test_file_eps.py

@@ -336,9 +336,7 @@ def test_readline_psfile(tmp_path: Path) -> None:
     strings = ["something", "else", "baz", "bif"]
 
     def _test_readline(t: EpsImagePlugin.PSFile, ending: str) -> None:
-        ending = "Failure with line ending: %s" % (
+        ending = f"Failure with line ending: {''.join(str(ord(s)) for s in ending)}"
-            "".join("%s" % ord(s) for s in ending)
-        )
         assert t.readline().strip("\r\n") == "something", ending
         assert t.readline().strip("\r\n") == "else", ending
         assert t.readline().strip("\r\n") == "baz", ending

Tests/test_file_libtiff.py

@@ -185,7 +185,9 @@ class TestFileLibTiff(LibTiffTestCase):
             assert field in reloaded, f"{field} not in metadata"
 
     @pytest.mark.valgrind_known_error(reason="Known invalid metadata")
-    def test_additional_metadata(self, tmp_path: Path) -> None:
+    def test_additional_metadata(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
         # these should not crash. Seriously dummy data, most of it doesn't make
         # any sense, so we're running up against limits where we're asking
         # libtiff to do stupid things.
@@ -236,13 +238,28 @@ class TestFileLibTiff(LibTiffTestCase):
             del new_ifd[338]
 
             out = str(tmp_path / "temp.tif")
-            TiffImagePlugin.WRITE_LIBTIFF = True
+            monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
 
             im.save(out, tiffinfo=new_ifd)
 
-        TiffImagePlugin.WRITE_LIBTIFF = False
+    @pytest.mark.parametrize(
+        "libtiff",
+        (
+            pytest.param(
+                True,
+                marks=pytest.mark.skipif(
+                    not getattr(Image.core, "libtiff_support_custom_tags", False),
+                    reason="Custom tags not supported by older libtiff",
+                ),
+            ),
+            False,
+        ),
+    )
+    def test_custom_metadata(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path, libtiff: bool
+    ) -> None:
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", libtiff)
 
-    def test_custom_metadata(self, tmp_path: Path) -> None:
         class Tc(NamedTuple):
             value: Any
             type: int
@@ -281,13 +298,6 @@ class TestFileLibTiff(LibTiffTestCase):
             )
         }
 
-        libtiffs = [False]
-        if Image.core.libtiff_support_custom_tags:
-            libtiffs.append(True)
-
-        for libtiff in libtiffs:
-            TiffImagePlugin.WRITE_LIBTIFF = libtiff
-
         def check_tags(
             tiffinfo: TiffImagePlugin.ImageFileDirectory_v2 | dict[int, str]
         ) -> None:
@@ -304,9 +314,7 @@ class TestFileLibTiff(LibTiffTestCase):
                         and libtiff
                     ):
                         # libtiff does not support real RATIONALS
-                            assert (
+                        assert round(abs(float(reloaded_value) - float(value)), 7) == 0
-                                round(abs(float(reloaded_value) - float(value)), 7) == 0
-                            )
                         continue
 
                     assert reloaded_value == value
@@ -327,7 +335,6 @@ class TestFileLibTiff(LibTiffTestCase):
                 if tagdata.supported_by_default
             }
         )
-        TiffImagePlugin.WRITE_LIBTIFF = False
 
     def test_osubfiletype(self, tmp_path: Path) -> None:
         outfile = str(tmp_path / "temp.tif")
@@ -343,24 +350,24 @@ class TestFileLibTiff(LibTiffTestCase):
             # Should not segfault
             im.save(outfile)
 
-    def test_xmlpacket_tag(self, tmp_path: Path) -> None:
+    def test_xmlpacket_tag(
-        TiffImagePlugin.WRITE_LIBTIFF = True
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
 
         out = str(tmp_path / "temp.tif")
         hopper().save(out, tiffinfo={700: b"xmlpacket tag"})
-        TiffImagePlugin.WRITE_LIBTIFF = False
 
         with Image.open(out) as reloaded:
             if 700 in reloaded.tag_v2:
                 assert reloaded.tag_v2[700] == b"xmlpacket tag"
 
-    def test_int_dpi(self, tmp_path: Path) -> None:
+    def test_int_dpi(self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
         # issue #1765
         im = hopper("RGB")
         out = str(tmp_path / "temp.tif")
-        TiffImagePlugin.WRITE_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
         im.save(out, dpi=(72, 72))
-        TiffImagePlugin.WRITE_LIBTIFF = False
         with Image.open(out) as reloaded:
             assert reloaded.info["dpi"] == (72.0, 72.0)
 
@@ -422,13 +429,13 @@ class TestFileLibTiff(LibTiffTestCase):
             assert "temp.tif" == reread.tag_v2[269]
             assert "temp.tif" == reread.tag[269][0]
 
-    def test_12bit_rawmode(self) -> None:
+    def test_12bit_rawmode(self, monkeypatch: pytest.MonkeyPatch) -> None:
         """Are we generating the same interpretation
         of the image as Imagemagick is?"""
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open("Tests/images/12bit.cropped.tif") as im:
             im.load()
-            TiffImagePlugin.READ_LIBTIFF = False
+            monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", False)
             # to make the target --
             # convert 12bit.cropped.tif -depth 16 tmp.tif
             # convert tmp.tif -evaluate RightShift 4 12in16bit2.tif
@@ -514,12 +521,13 @@ class TestFileLibTiff(LibTiffTestCase):
         assert_image_equal_tofile(im, out)
 
     @pytest.mark.parametrize("im", (hopper("P"), Image.new("P", (1, 1), "#000")))
-    def test_palette_save(self, im: Image.Image, tmp_path: Path) -> None:
+    def test_palette_save(
+        self, im: Image.Image, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
         out = str(tmp_path / "temp.tif")
 
-        TiffImagePlugin.WRITE_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
         im.save(out)
-        TiffImagePlugin.WRITE_LIBTIFF = False
 
         with Image.open(out) as reloaded:
             # colormap/palette tag
@@ -548,9 +556,9 @@ class TestFileLibTiff(LibTiffTestCase):
         with pytest.raises(OSError):
             os.close(fn)
 
-    def test_multipage(self) -> None:
+    def test_multipage(self, monkeypatch: pytest.MonkeyPatch) -> None:
         # issue #862
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open("Tests/images/multipage.tiff") as im:
             # file is a multipage tiff,  10x10 green, 10x10 red, 20x20 blue
 
@@ -569,11 +577,9 @@ class TestFileLibTiff(LibTiffTestCase):
             assert im.size == (20, 20)
             assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255)
 
-        TiffImagePlugin.READ_LIBTIFF = False
+    def test_multipage_nframes(self, monkeypatch: pytest.MonkeyPatch) -> None:
-
-    def test_multipage_nframes(self) -> None:
         # issue #862
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open("Tests/images/multipage.tiff") as im:
             frames = im.n_frames
             assert frames == 3
@@ -582,10 +588,8 @@ class TestFileLibTiff(LibTiffTestCase):
                 # Should not raise ValueError: I/O operation on closed file
                 im.load()
 
-        TiffImagePlugin.READ_LIBTIFF = False
+    def test_multipage_seek_backwards(self, monkeypatch: pytest.MonkeyPatch) -> None:
-
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
-    def test_multipage_seek_backwards(self) -> None:
-        TiffImagePlugin.READ_LIBTIFF = True
         with Image.open("Tests/images/multipage.tiff") as im:
             im.seek(1)
             im.load()
@@ -593,24 +597,21 @@ class TestFileLibTiff(LibTiffTestCase):
             im.seek(0)
             assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0)
 
-        TiffImagePlugin.READ_LIBTIFF = False
+    def test__next(self, monkeypatch: pytest.MonkeyPatch) -> None:
-
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
-    def test__next(self) -> None:
-        TiffImagePlugin.READ_LIBTIFF = True
         with Image.open("Tests/images/hopper.tif") as im:
             assert not im.tag.next
             im.load()
             assert not im.tag.next
 
-    def test_4bit(self) -> None:
+    def test_4bit(self, monkeypatch: pytest.MonkeyPatch) -> None:
         # Arrange
         test_file = "Tests/images/hopper_gray_4bpp.tif"
         original = hopper("L")
 
         # Act
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open(test_file) as im:
-            TiffImagePlugin.READ_LIBTIFF = False
 
             # Assert
             assert im.size == (128, 128)
@@ -650,12 +651,12 @@ class TestFileLibTiff(LibTiffTestCase):
                     assert im2.mode == "L"
                     assert_image_equal(im, im2)
 
-    def test_save_bytesio(self) -> None:
+    def test_save_bytesio(self, monkeypatch: pytest.MonkeyPatch) -> None:
         # PR 1011
         # Test TIFF saving to io.BytesIO() object.
 
-        TiffImagePlugin.WRITE_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
 
         # Generate test image
         pilim = hopper()
@@ -672,9 +673,6 @@ class TestFileLibTiff(LibTiffTestCase):
         save_bytesio("packbits")
         save_bytesio("tiff_lzw")
 
-        TiffImagePlugin.WRITE_LIBTIFF = False
-        TiffImagePlugin.READ_LIBTIFF = False
-
     def test_save_ycbcr(self, tmp_path: Path) -> None:
         im = hopper("YCbCr")
         outfile = str(tmp_path / "temp.tif")
@@ -694,15 +692,16 @@ class TestFileLibTiff(LibTiffTestCase):
             if Image.core.libtiff_support_custom_tags:
                 assert reloaded.tag_v2[34665] == 125456
 
-    def test_crashing_metadata(self, tmp_path: Path) -> None:
+    def test_crashing_metadata(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
         # issue 1597
         with Image.open("Tests/images/rdf.tif") as im:
             out = str(tmp_path / "temp.tif")
 
-            TiffImagePlugin.WRITE_LIBTIFF = True
+            monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
             # this shouldn't crash
             im.save(out, format="TIFF")
-        TiffImagePlugin.WRITE_LIBTIFF = False
 
     def test_page_number_x_0(self, tmp_path: Path) -> None:
         # Issue 973
@@ -733,20 +732,33 @@ class TestFileLibTiff(LibTiffTestCase):
         # Should not raise PermissionError.
         os.remove(tmpfile)
 
-    def test_read_icc(self) -> None:
+    def test_read_icc(self, monkeypatch: pytest.MonkeyPatch) -> None:
         with Image.open("Tests/images/hopper.iccprofile.tif") as img:
             icc = img.info.get("icc_profile")
             assert icc is not None
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open("Tests/images/hopper.iccprofile.tif") as img:
             icc_libtiff = img.info.get("icc_profile")
             assert icc_libtiff is not None
-        TiffImagePlugin.READ_LIBTIFF = False
         assert icc == icc_libtiff
 
-    def test_write_icc(self, tmp_path: Path) -> None:
+    @pytest.mark.parametrize(
-        def check_write(libtiff: bool) -> None:
+        "libtiff",
-            TiffImagePlugin.WRITE_LIBTIFF = libtiff
+        (
+            pytest.param(
+                True,
+                marks=pytest.mark.skipif(
+                    not getattr(Image.core, "libtiff_support_custom_tags", False),
+                    reason="Custom tags not supported by older libtiff",
+                ),
+            ),
+            False,
+        ),
+    )
+    def test_write_icc(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path, libtiff: bool
+    ) -> None:
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", libtiff)
 
         with Image.open("Tests/images/hopper.iccprofile.tif") as img:
             icc_profile = img.info["icc_profile"]
@@ -756,14 +768,6 @@ class TestFileLibTiff(LibTiffTestCase):
         with Image.open(out) as reloaded:
             assert icc_profile == reloaded.info["icc_profile"]
 
-        libtiffs = []
-        if Image.core.libtiff_support_custom_tags:
-            libtiffs.append(True)
-        libtiffs.append(False)
-
-        for libtiff in libtiffs:
-            check_write(libtiff)
-
     def test_multipage_compression(self) -> None:
         with Image.open("Tests/images/compression.tif") as im:
             im.seek(0)
@@ -840,12 +844,13 @@ class TestFileLibTiff(LibTiffTestCase):
 
             assert_image_equal_tofile(im, "Tests/images/copyleft.png", mode="RGB")
 
-    def test_sampleformat_write(self, tmp_path: Path) -> None:
+    def test_sampleformat_write(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
         im = Image.new("F", (1, 1))
         out = str(tmp_path / "temp.tif")
-        TiffImagePlugin.WRITE_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
         im.save(out)
-        TiffImagePlugin.WRITE_LIBTIFF = False
 
         with Image.open(out) as reloaded:
             assert reloaded.mode == "F"
@@ -1091,15 +1096,14 @@ class TestFileLibTiff(LibTiffTestCase):
         with Image.open(out) as im:
             im.load()
 
-    def test_realloc_overflow(self) -> None:
+    def test_realloc_overflow(self, monkeypatch: pytest.MonkeyPatch) -> None:
-        TiffImagePlugin.READ_LIBTIFF = True
+        monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", True)
         with Image.open("Tests/images/tiff_overflow_rows_per_strip.tif") as im:
             with pytest.raises(OSError) as e:
                 im.load()
 
             # Assert that the error code is IMAGING_CODEC_MEMORY
             assert str(e.value) == "-9"
-        TiffImagePlugin.READ_LIBTIFF = False
 
     @pytest.mark.parametrize("compression", ("tiff_adobe_deflate", "jpeg"))
     def test_save_multistrip(self, compression: str, tmp_path: Path) -> None:

Tests/test_file_mpeg.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+from io import BytesIO
+
+import pytest
+
+from PIL import Image, MpegImagePlugin
+
+
+def test_identify() -> None:
+    # Arrange
+    b = BytesIO(b"\x00\x00\x01\xb3\x01\x00\x01")
+
+    # Act
+    with Image.open(b) as im:
+        # Assert
+        assert im.format == "MPEG"
+
+        assert im.mode == "RGB"
+        assert im.size == (16, 1)
+
+
+def test_invalid_file() -> None:
+    # Arrange
+    invalid_file = "Tests/images/flower.jpg"
+
+    # Act / Assert
+    with pytest.raises(SyntaxError):
+        MpegImagePlugin.MpegImageFile(invalid_file)
+
+
+def test_load() -> None:
+    # Arrange
+    b = BytesIO(b"\x00\x00\x01\xb3\x01\x00\x01")
+
+    with Image.open(b) as im:
+        # Act / Assert: cannot load
+        with pytest.raises(OSError):
+            im.load()

Tests/test_file_png.py

@@ -85,7 +85,9 @@ class TestFilePng:
 
     def test_sanity(self, tmp_path: Path) -> None:
         # internal version number
-        assert re.search(r"\d+(\.\d+){1,3}$", features.version_codec("zlib"))
+        assert re.search(
+            r"\d+(\.\d+){1,3}(\.zlib\-ng)?$", features.version_codec("zlib")
+        )
 
         test_file = str(tmp_path / "temp.png")
 

Tests/test_image.py

@@ -28,45 +28,26 @@ from .helper import (
     assert_image_similar_tofile,
     assert_not_all_same,
     hopper,
+    is_big_endian,
     is_win32,
     mark_if_feature_version,
     skip_unless_feature,
 )
 
-# name, pixel size
-image_modes = (
-    ("1", 1),
-    ("L", 1),
-    ("LA", 4),
-    ("La", 4),
-    ("P", 1),
-    ("PA", 4),
-    ("F", 4),
-    ("I", 4),
-    ("I;16", 2),
-    ("I;16L", 2),
-    ("I;16B", 2),
-    ("I;16N", 2),
-    ("RGB", 4),
-    ("RGBA", 4),
-    ("RGBa", 4),
-    ("RGBX", 4),
-    ("BGR;15", 2),
-    ("BGR;16", 2),
-    ("BGR;24", 3),
-    ("CMYK", 4),
-    ("YCbCr", 4),
-    ("HSV", 4),
-    ("LAB", 4),
-)
 
-image_mode_names = [name for name, _ in image_modes]
+# Deprecation helper
+def helper_image_new(mode: str, size: tuple[int, int]) -> Image.Image:
+    if mode.startswith("BGR;"):
+        with pytest.warns(DeprecationWarning):
+            return Image.new(mode, size)
+    else:
+        return Image.new(mode, size)
 
 
 class TestImage:
-    @pytest.mark.parametrize("mode", image_mode_names)
+    @pytest.mark.parametrize("mode", Image.MODES + ["BGR;15", "BGR;16", "BGR;24"])
     def test_image_modes_success(self, mode: str) -> None:
-        Image.new(mode, (1, 1))
+        helper_image_new(mode, (1, 1))
 
     @pytest.mark.parametrize("mode", ("", "bad", "very very long"))
     def test_image_modes_fail(self, mode: str) -> None:
@@ -1045,30 +1026,33 @@ class TestImage:
 
 
 class TestImageBytes:
-    @pytest.mark.parametrize("mode", image_mode_names)
+    @pytest.mark.parametrize("mode", Image.MODES + ["BGR;15", "BGR;16", "BGR;24"])
     def test_roundtrip_bytes_constructor(self, mode: str) -> None:
         im = hopper(mode)
         source_bytes = im.tobytes()
 
+        if mode.startswith("BGR;"):
+            with pytest.warns(DeprecationWarning):
+                reloaded = Image.frombytes(mode, im.size, source_bytes)
+        else:
             reloaded = Image.frombytes(mode, im.size, source_bytes)
         assert reloaded.tobytes() == source_bytes
 
-    @pytest.mark.parametrize("mode", image_mode_names)
+    @pytest.mark.parametrize("mode", Image.MODES + ["BGR;15", "BGR;16", "BGR;24"])
     def test_roundtrip_bytes_method(self, mode: str) -> None:
         im = hopper(mode)
         source_bytes = im.tobytes()
 
-        reloaded = Image.new(mode, im.size)
+        reloaded = helper_image_new(mode, im.size)
         reloaded.frombytes(source_bytes)
         assert reloaded.tobytes() == source_bytes
 
-    @pytest.mark.parametrize(("mode", "pixelsize"), image_modes)
+    @pytest.mark.parametrize("mode", Image.MODES + ["BGR;15", "BGR;16", "BGR;24"])
-    def test_getdata_putdata(self, mode: str, pixelsize: int) -> None:
+    def test_getdata_putdata(self, mode: str) -> None:
-        im = Image.new(mode, (2, 2))
+        if is_big_endian() and mode == "BGR;15":
-        source_bytes = bytes(range(im.width * im.height * pixelsize))
+            pytest.xfail("Known failure of BGR;15 on big-endian")
-        im.frombytes(source_bytes)
+        im = hopper(mode)
-
+        reloaded = helper_image_new(mode, im.size)
-        reloaded = Image.new(mode, im.size)
         reloaded.putdata(im.getdata())
         assert_image_equal(im, reloaded)
 

Tests/test_image_access.py

@@ -33,7 +33,7 @@ except ImportError:
 
 
 class AccessTest:
-    # initial value
+    # Initial value
     _init_cffi_access = Image.USE_CFFI_ACCESS
     _need_cffi_access = False
 
@@ -138,8 +138,8 @@ class TestImageGetPixel(AccessTest):
         if bands == 1:
             return 1
         if mode in ("BGR;15", "BGR;16"):
-            # These modes have less than 8 bits per band
+            # These modes have less than 8 bits per band,
-            # So (1, 2, 3) cannot be roundtripped
+            # so (1, 2, 3) cannot be roundtripped.
             return (16, 32, 49)
         return tuple(range(1, bands + 1))
 
@@ -151,7 +151,7 @@ class TestImageGetPixel(AccessTest):
             self.color(mode) if expected_color_int is None else expected_color_int
         )
 
-        # check putpixel
+        # Check putpixel
         im = Image.new(mode, (1, 1), None)
         im.putpixel((0, 0), expected_color)
         actual_color = im.getpixel((0, 0))
@@ -160,7 +160,7 @@ class TestImageGetPixel(AccessTest):
             f"expected {expected_color} got {actual_color}"
         )
 
-        # check putpixel negative index
+        # Check putpixel negative index
         im.putpixel((-1, -1), expected_color)
         actual_color = im.getpixel((-1, -1))
         assert actual_color == expected_color, (
@@ -168,22 +168,21 @@ class TestImageGetPixel(AccessTest):
             f"expected {expected_color} got {actual_color}"
         )
 
-        # Check 0
+        # Check 0x0 image with None initial color
         im = Image.new(mode, (0, 0), None)
         assert im.load() is not None
-
         error = ValueError if self._need_cffi_access else IndexError
         with pytest.raises(error):
             im.putpixel((0, 0), expected_color)
         with pytest.raises(error):
             im.getpixel((0, 0))
-        # Check 0 negative index
+        # Check negative index
         with pytest.raises(error):
             im.putpixel((-1, -1), expected_color)
         with pytest.raises(error):
             im.getpixel((-1, -1))
 
-        # check initial color
+        # Check initial color
         im = Image.new(mode, (1, 1), expected_color)
         actual_color = im.getpixel((0, 0))
         assert actual_color == expected_color, (
@@ -191,46 +190,30 @@ class TestImageGetPixel(AccessTest):
             f"expected {expected_color} got {actual_color}"
         )
 
-        # check initial color negative index
+        # Check initial color negative index
         actual_color = im.getpixel((-1, -1))
         assert actual_color == expected_color, (
             f"initial color failed with negative index for mode {mode}, "
             f"expected {expected_color} got {actual_color}"
         )
 
-        # Check 0
+        # Check 0x0 image with initial color
         im = Image.new(mode, (0, 0), expected_color)
         with pytest.raises(error):
             im.getpixel((0, 0))
-        # Check 0 negative index
+        # Check negative index
         with pytest.raises(error):
             im.getpixel((-1, -1))
 
-    @pytest.mark.parametrize(
+    @pytest.mark.parametrize("mode", Image.MODES)
-        "mode",
-        (
-            "1",
-            "L",
-            "LA",
-            "I",
-            "I;16",
-            "I;16B",
-            "F",
-            "P",
-            "PA",
-            "BGR;15",
-            "BGR;16",
-            "BGR;24",
-            "RGB",
-            "RGBA",
-            "RGBX",
-            "CMYK",
-            "YCbCr",
-        ),
-    )
     def test_basic(self, mode: str) -> None:
         self.check(mode)
 
+    @pytest.mark.parametrize("mode", ("BGR;15", "BGR;16", "BGR;24"))
+    def test_deprecated(self, mode: str) -> None:
+        with pytest.warns(DeprecationWarning):
+            self.check(mode)
+
     def test_list(self) -> None:
         im = hopper()
         assert im.getpixel([0, 0]) == (20, 20, 70)
@@ -238,7 +221,7 @@ class TestImageGetPixel(AccessTest):
     @pytest.mark.parametrize("mode", ("I;16", "I;16B"))
     @pytest.mark.parametrize("expected_color", (2**15 - 1, 2**15, 2**15 + 1, 2**16 - 1))
     def test_signedness(self, mode: str, expected_color: int) -> None:
-        # see https://github.com/python-pillow/Pillow/issues/452
+        # See https://github.com/python-pillow/Pillow/issues/452
         # pixelaccess is using signed int* instead of uint*
         self.check(mode, expected_color)
 
@@ -298,13 +281,6 @@ class TestCffi(AccessTest):
                 im = Image.new(mode, (10, 10), 40000)
                 self._test_get_access(im)
 
-        # These don't actually appear to be modes that I can actually make,
-        # as unpack sets them directly into the I mode.
-        # im = Image.new('I;32L', (10, 10), -2**10)
-        # self._test_get_access(im)
-        # im = Image.new('I;32B', (10, 10), 2**10)
-        # self._test_get_access(im)
-
     def _test_set_access(self, im: Image.Image, color: tuple[int, ...] | float) -> None:
         """Are we writing the correct bits into the image?
 
@@ -336,23 +312,18 @@ class TestCffi(AccessTest):
         self._test_set_access(hopper("LA"), (128, 128))
         self._test_set_access(hopper("1"), 255)
         self._test_set_access(hopper("P"), 128)
-        # self._test_set_access(i, (128, 128))  #PA  -- undone how to make
+        self._test_set_access(hopper("PA"), (128, 128))
         self._test_set_access(hopper("F"), 1024.0)
 
         for mode in ("I;16", "I;16L", "I;16B", "I;16N", "I"):
             im = Image.new(mode, (10, 10), 40000)
             self._test_set_access(im, 45000)
 
-        # im = Image.new('I;32L', (10, 10), -(2**10))
-        # self._test_set_access(im, -(2**13)+1)
-        # im = Image.new('I;32B', (10, 10), 2**10)
-        # self._test_set_access(im, 2**13-1)
-
     @pytest.mark.filterwarnings("ignore::DeprecationWarning")
     def test_not_implemented(self) -> None:
         assert PyAccess.new(hopper("BGR;15")) is None
 
-    # ref https://github.com/python-pillow/Pillow/pull/2009
+    # Ref https://github.com/python-pillow/Pillow/pull/2009
     def test_reference_counting(self) -> None:
         size = 10
 
@@ -361,7 +332,7 @@ class TestCffi(AccessTest):
             with pytest.warns(DeprecationWarning):
                 px = Image.new("L", (size, 1), 0).load()
             for i in range(size):
-                # pixels can contain garbage if image is released
+                # Pixels can contain garbage if image is released
                 assert px[i, 0] == 0
 
     @pytest.mark.parametrize("mode", ("P", "PA"))
@@ -439,13 +410,14 @@ class TestEmbeddable:
         from setuptools.command import build_ext
 
         with open("embed_pil.c", "w", encoding="utf-8") as fh:
+            home = sys.prefix.replace("\\", "\\\\")
             fh.write(
-                """
+                f"""
 #include "Python.h"
 
 int main(int argc, char* argv[])
-{
+{{
-    char *home = "%s";
+    char *home = "{home}";
     wchar_t *whome = Py_DecodeLocale(home, NULL);
     Py_SetPythonHome(whome);
 
@@ -460,9 +432,8 @@ int main(int argc, char* argv[])
     PyMem_RawFree(whome);
 
     return 0;
-}
+}}
         """
-                % sys.prefix.replace("\\", "\\\\")
             )
 
         compiler = getattr(build_ext, "new_compiler")()
@@ -478,7 +449,7 @@ int main(int argc, char* argv[])
         env = os.environ.copy()
         env["PATH"] = sys.prefix + ";" + env["PATH"]
 
-        # do not display the Windows Error Reporting dialog
+        # Do not display the Windows Error Reporting dialog
         getattr(ctypes, "windll").kernel32.SetErrorMode(0x0002)
 
         process = subprocess.Popen(["embed_pil.exe"], env=env)

Tests/test_image_putdata.py

@@ -81,6 +81,7 @@ def test_mode_F() -> None:
 @pytest.mark.parametrize("mode", ("BGR;15", "BGR;16", "BGR;24"))
 def test_mode_BGR(mode: str) -> None:
     data = [(16, 32, 49), (32, 32, 98)]
+    with pytest.warns(DeprecationWarning):
         im = Image.new(mode, (1, 2))
     im.putdata(data)
 

Tests/test_imagesequence.py

@@ -47,7 +47,11 @@ def test_iterator_min_frame() -> None:
             assert i[index] == next(i)
 
 
-def _test_multipage_tiff() -> None:
+@pytest.mark.parametrize(
+    "libtiff", (pytest.param(True, marks=skip_unless_feature("libtiff")), False)
+)
+def test_multipage_tiff(monkeypatch: pytest.MonkeyPatch, libtiff: bool) -> None:
+    monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", libtiff)
     with Image.open("Tests/images/multipage.tiff") as im:
         for index, frame in enumerate(ImageSequence.Iterator(im)):
             frame.load()
@@ -55,17 +59,6 @@ def _test_multipage_tiff() -> None:
             frame.convert("RGB")
 
 
-def test_tiff() -> None:
-    _test_multipage_tiff()
-
-
-@skip_unless_feature("libtiff")
-def test_libtiff() -> None:
-    TiffImagePlugin.READ_LIBTIFF = True
-    _test_multipage_tiff()
-    TiffImagePlugin.READ_LIBTIFF = False
-
-
 def test_consecutive() -> None:
     with Image.open("Tests/images/multipage.tiff") as im:
         first_frame = None

Tests/test_lib_pack.py

@@ -216,7 +216,10 @@ class TestLibPack:
             )
 
     def test_I16(self) -> None:
+        if sys.byteorder == "little":
             self.assert_pack("I;16N", "I;16N", 2, 0x0201, 0x0403, 0x0605)
+        else:
+            self.assert_pack("I;16N", "I;16N", 2, 0x0102, 0x0304, 0x0506)
 
     def test_F_float(self) -> None:
         self.assert_pack("F", "F;32F", 4, 1.539989614439558e-36, 4.063216068939723e-34)
@@ -359,7 +362,10 @@ class TestLibUnpack:
         )
 
     def test_BGR(self) -> None:
-        self.assert_unpack("BGR;15", "BGR;15", 3, (8, 131, 0), (24, 0, 8), (41, 131, 8))
+        with pytest.warns(DeprecationWarning):
+            self.assert_unpack(
+                "BGR;15", "BGR;15", 3, (8, 131, 0), (24, 0, 8), (41, 131, 8)
+            )
             self.assert_unpack(
                 "BGR;16", "BGR;16", 3, (8, 64, 0), (24, 129, 0), (41, 194, 0)
             )

Tests/test_tiff_ifdrational.py

@@ -3,10 +3,12 @@ from __future__ import annotations
 from fractions import Fraction
 from pathlib import Path
 
-from PIL import Image, TiffImagePlugin, features
+import pytest
+
+from PIL import Image, TiffImagePlugin
 from PIL.TiffImagePlugin import IFDRational
 
-from .helper import hopper
+from .helper import hopper, skip_unless_feature
 
 
 def _test_equal(num, denom, target) -> None:
@@ -52,17 +54,17 @@ def test_nonetype() -> None:
     assert xres and yres
 
 
-def test_ifd_rational_save(tmp_path: Path) -> None:
+@pytest.mark.parametrize(
-    methods = [True]
+    "libtiff", (pytest.param(True, marks=skip_unless_feature("libtiff")), False)
-    if features.check("libtiff"):
+)
-        methods.append(False)
+def test_ifd_rational_save(
-
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path, libtiff: bool
-    for libtiff in methods:
+) -> None:
-        TiffImagePlugin.WRITE_LIBTIFF = libtiff
-
     im = hopper()
     out = str(tmp_path / "temp.tiff")
     res = IFDRational(301, 1)
+
+    monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", libtiff)
     im.save(out, dpi=(res, res), compression="raw")
 
     with Image.open(out) as reloaded:

docs/conf.py

@@ -28,6 +28,7 @@ needs_sphinx = "7.3"
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
+    "dater",
     "sphinx.ext.autodoc",
     "sphinx.ext.extlinks",
     "sphinx.ext.intersphinx",

docs/dater.py

@@ -0,0 +1,48 @@
+"""
+Sphinx extension to add timestamps to release notes based on Git versions.
+
+Based on https://github.com/jaraco/rst.linker, with thanks to Jason R. Coombs.
+"""
+
+from __future__ import annotations
+
+import re
+import subprocess
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from sphinx.application import Sphinx
+
+DOC_NAME_REGEX = re.compile(r"releasenotes/\d+\.\d+\.\d+")
+VERSION_TITLE_REGEX = re.compile(r"^(\d+\.\d+\.\d+)\n-+\n")
+
+
+def get_date_for(git_version: str) -> str | None:
+    cmd = ["git", "log", "-1", "--format=%ai", git_version]
+    try:
+        out = subprocess.check_output(
+            cmd, stderr=subprocess.DEVNULL, text=True, encoding="utf-8"
+        )
+    except subprocess.CalledProcessError:
+        return None
+    return out.split()[0]
+
+
+def add_date(app: Sphinx, doc_name: str, source: list[str]) -> None:
+    if DOC_NAME_REGEX.match(doc_name) and (m := VERSION_TITLE_REGEX.match(source[0])):
+        old_title = m.group(1)
+
+        if tag_date := get_date_for(old_title):
+            new_title = f"{old_title} ({tag_date})"
+        else:
+            new_title = f"{old_title} (unreleased)"
+
+        new_underline = "-" * len(new_title)
+
+        result = source[0].replace(m.group(0), f"{new_title}\n{new_underline}\n", 1)
+        source[0] = result
+
+
+def setup(app: Sphinx) -> dict[str, bool]:
+    app.connect("source-read", add_date)
+    return {"parallel_read_safe": True}

docs/deprecations.rst

@@ -100,6 +100,21 @@ ImageMath eval()
 ``ImageMath.eval()`` has been deprecated. Use :py:meth:`~PIL.ImageMath.lambda_eval` or
 :py:meth:`~PIL.ImageMath.unsafe_eval` instead.
 
+BGR;15, BGR 16 and BGR;24
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. deprecated:: 10.4.0
+
+The experimental BGR;15, BGR;16 and BGR;24 modes have been deprecated.
+
+Support for LibTIFF earlier than 4
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. deprecated:: 10.4.0
+
+Support for LibTIFF earlier than version 4 has been deprecated.
+Upgrade to a newer version of LibTIFF instead.
+
 Removed features
 ----------------
 

docs/handbook/concepts.rst

@@ -59,9 +59,6 @@ Pillow also provides limited support for a few additional modes, including:
     * ``I;16L`` (16-bit little endian unsigned integer pixels)
     * ``I;16B`` (16-bit big endian unsigned integer pixels)
     * ``I;16N`` (16-bit native endian unsigned integer pixels)
-    * ``BGR;15`` (15-bit reversed true colour)
-    * ``BGR;16`` (16-bit reversed true colour)
-    * ``BGR;24`` (24-bit reversed true colour)
 
 Premultiplied alpha is where the values for each other channel have been
 multiplied by the alpha. For example, an RGBA pixel of ``(10, 20, 30, 127)``

docs/installation/platform-support.rst

@@ -31,13 +31,13 @@ These platforms are built and tested for every change.
 +----------------------------------+----------------------------+---------------------+
 | Debian 12 Bookworm               | 3.11                       | x86, x86-64         |
 +----------------------------------+----------------------------+---------------------+
-| Fedora 38                        | 3.11                       | x86-64              |
-+----------------------------------+----------------------------+---------------------+
 | Fedora 39                        | 3.12                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
+| Fedora 40                        | 3.12                       | x86-64              |
++----------------------------------+----------------------------+---------------------+
 | Gentoo                           | 3.9                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| macOS 12 Monterey                | 3.8, 3.9                   | x86-64              |
+| macOS 13 Ventura                 | 3.8, 3.9                   | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 | macOS 14 Sonoma                  | 3.10, 3.11, 3.12, 3.13,    | arm64               |
 |                                  | PyPy3                      |                     |
@@ -47,7 +47,9 @@ These platforms are built and tested for every change.
 | Ubuntu Linux 22.04 LTS (Jammy)   | 3.8, 3.9, 3.10, 3.11,      | x86-64              |
 |                                  | 3.12, 3.13, PyPy3          |                     |
 |                                  +----------------------------+---------------------+
-|                                  | 3.10                       | arm64v8, ppc64le,   |
+|                                  | 3.10                       | arm64v8             |
++----------------------------------+----------------------------+---------------------+
+| Ubuntu Linux 24.04 LTS (Noble)   | 3.12                       | x86-64, ppc64le,    |
 |                                  |                            | s390x               |
 +----------------------------------+----------------------------+---------------------+
 | Windows Server 2016              | 3.8                        | x86-64              |

docs/releasenotes/10.4.0.rst

@@ -0,0 +1,59 @@
+10.4.0
+------
+
+Security
+========
+
+TODO
+^^^^
+
+TODO
+
+:cve:`YYYY-XXXXX`: TODO
+^^^^^^^^^^^^^^^^^^^^^^^
+
+TODO
+
+Backwards Incompatible Changes
+==============================
+
+TODO
+^^^^
+
+Deprecations
+============
+
+BGR;15, BGR 16 and BGR;24
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The experimental BGR;15, BGR;16 and BGR;24 modes have been deprecated.
+
+Support for LibTIFF earlier than 4
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Support for LibTIFF earlier than version 4 has been deprecated.
+Upgrade to a newer version of LibTIFF instead.
+
+API Changes
+===========
+
+TODO
+^^^^
+
+TODO
+
+API Additions
+=============
+
+TODO
+^^^^
+
+TODO
+
+Other Changes
+=============
+
+TODO
+^^^^
+
+TODO

docs/releasenotes/index.rst

@@ -14,6 +14,7 @@ expected to be backported to earlier versions.
 .. toctree::
   :maxdepth: 2
 
+  10.4.0
   10.3.0
   10.2.0
   10.1.0

selftest.py

@@ -165,9 +165,9 @@ if __name__ == "__main__":
     print("Running selftest:")
     status = doctest.testmod(sys.modules[__name__])
     if status[0]:
-        print("*** %s tests of %d failed." % status)
+        print(f"*** {status[0]} tests of {status[1]} failed.")
         exit_status = 1
     else:
-        print("--- %s tests passed." % status[1])
+        print(f"--- {status[1]} tests passed.")
 
     sys.exit(exit_status)

src/PIL/BlpImagePlugin.py

@@ -253,7 +253,7 @@ class BlpImageFile(ImageFile.ImageFile):
     format = "BLP"
     format_description = "Blizzard Mipmap Format"
 
-    def _open(self):
+    def _open(self) -> None:
         self.magic = self.fp.read(4)
 
         self.fp.seek(5, os.SEEK_CUR)
@@ -333,7 +333,7 @@ class _BLPBaseDecoder(ImageFile.PyDecoder):
 
 
 class BLP1Decoder(_BLPBaseDecoder):
-    def _load(self):
+    def _load(self) -> None:
         if self._blp_compression == Format.JPEG:
             self._decode_jpeg_stream()
 
@@ -418,7 +418,7 @@ class BLP2Decoder(_BLPBaseDecoder):
 class BLPEncoder(ImageFile.PyEncoder):
     _pushes_fd = True
 
-    def _write_palette(self):
+    def _write_palette(self) -> bytes:
         data = b""
         palette = self.im.getpalette("RGBA", "RGBA")
         for i in range(len(palette) // 4):

src/PIL/BmpImagePlugin.py

@@ -286,7 +286,7 @@ class BmpImageFile(ImageFile.ImageFile):
             )
         ]
 
-    def _open(self):
+    def _open(self) -> None:
         """Open file, check magic number and read header"""
         # read 14 bytes: magic number, filesize, reserved, header final offset
         head_data = self.fp.read(14)
@@ -379,7 +379,7 @@ class DibImageFile(BmpImageFile):
     format = "DIB"
     format_description = "Windows Bitmap"
 
-    def _open(self):
+    def _open(self) -> None:
         self._bitmap()
 
 

src/PIL/BufrStubImagePlugin.py

@@ -37,7 +37,7 @@ class BufrStubImageFile(ImageFile.StubImageFile):
     format = "BUFR"
     format_description = "BUFR"
 
-    def _open(self):
+    def _open(self) -> None:
         offset = self.fp.tell()
 
         if not _accept(self.fp.read(4)):

src/PIL/CurImagePlugin.py

@@ -208,7 +208,7 @@ class CurImageFile(IcoImagePlugin.IcoImageFile):
     format = "CUR"
     format_description = "Windows Cursor"
 
-    def _open(self):
+    def _open(self) -> None:
         self.ico = CurFile(self.fp)
         self.info["sizes"] = self.ico.sizes()
         self.info["hotspots"] = self.ico.hotspots()

src/PIL/DcxImagePlugin.py

@@ -63,7 +63,7 @@ class DcxImageFile(PcxImageFile):
         self.is_animated = self.n_frames > 1
         self.seek(0)
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         self.frame = frame
@@ -71,7 +71,7 @@ class DcxImageFile(PcxImageFile):
         self.fp.seek(self._offset[frame])
         PcxImageFile._open(self)
 
-    def tell(self):
+    def tell(self) -> int:
         return self.frame
 
 

src/PIL/DdsImagePlugin.py

@@ -271,16 +271,16 @@ class D3DFMT(IntEnum):
 module = sys.modules[__name__]
 for item in DDSD:
     assert item.name is not None
-    setattr(module, "DDSD_" + item.name, item.value)
+    setattr(module, f"DDSD_{item.name}", item.value)
 for item1 in DDSCAPS:
     assert item1.name is not None
-    setattr(module, "DDSCAPS_" + item1.name, item1.value)
+    setattr(module, f"DDSCAPS_{item1.name}", item1.value)
 for item2 in DDSCAPS2:
     assert item2.name is not None
-    setattr(module, "DDSCAPS2_" + item2.name, item2.value)
+    setattr(module, f"DDSCAPS2_{item2.name}", item2.value)
 for item3 in DDPF:
     assert item3.name is not None
-    setattr(module, "DDPF_" + item3.name, item3.value)
+    setattr(module, f"DDPF_{item3.name}", item3.value)
 
 DDS_FOURCC = DDPF.FOURCC
 DDS_RGB = DDPF.RGB
@@ -331,7 +331,7 @@ class DdsImageFile(ImageFile.ImageFile):
     format = "DDS"
     format_description = "DirectDraw Surface"
 
-    def _open(self):
+    def _open(self) -> None:
         if not _accept(self.fp.read(4)):
             msg = "not a DDS file"
             raise SyntaxError(msg)
@@ -472,7 +472,7 @@ class DdsImageFile(ImageFile.ImageFile):
         else:
             self.tile = [ImageFile._Tile("raw", extents, 0, rawmode or self.mode)]
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         pass
 
 

src/PIL/EpsImagePlugin.py

@@ -42,7 +42,7 @@ gs_binary: str | bool | None = None
 gs_windows_binary = None
 
 
-def has_ghostscript():
+def has_ghostscript() -> bool:
     global gs_binary, gs_windows_binary
     if gs_binary is None:
         if sys.platform.startswith("win"):
@@ -178,7 +178,7 @@ class PSFile:
         self.char = None
         self.fp.seek(offset, whence)
 
-    def readline(self):
+    def readline(self) -> str:
         s = [self.char or b""]
         self.char = None
 
@@ -212,7 +212,7 @@ class EpsImageFile(ImageFile.ImageFile):
 
     mode_map = {1: "L", 2: "LAB", 3: "RGB", 4: "CMYK"}
 
-    def _open(self):
+    def _open(self) -> None:
         (length, offset) = self._find_offset(self.fp)
 
         # go to offset - start of "%!PS"
@@ -404,7 +404,7 @@ class EpsImageFile(ImageFile.ImageFile):
             self.tile = []
         return Image.Image.load(self)
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         # we can't incrementally load, so force ImageFile.parser to
         # use our custom load method by defining this method.
         pass

src/PIL/ExifTags.py

@@ -346,7 +346,7 @@ class Interop(IntEnum):
     InteropVersion = 2
     RelatedImageFileFormat = 4096
     RelatedImageWidth = 4097
-    RleatedImageHeight = 4098
+    RelatedImageHeight = 4098
 
 
 class IFD(IntEnum):

src/PIL/FliImagePlugin.py

@@ -123,7 +123,7 @@ class FliImageFile(ImageFile.ImageFile):
                 palette[i] = (r, g, b)
                 i += 1
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         if frame < self.__frame:
@@ -132,7 +132,7 @@ class FliImageFile(ImageFile.ImageFile):
         for f in range(self.__frame + 1, frame + 1):
             self._seek(f)
 
-    def _seek(self, frame):
+    def _seek(self, frame: int) -> None:
         if frame == 0:
             self.__frame = -1
             self._fp.seek(self.__rewind)
@@ -162,7 +162,7 @@ class FliImageFile(ImageFile.ImageFile):
 
         self.__offset += framesize
 
-    def tell(self):
+    def tell(self) -> int:
         return self.__frame
 
 

src/PIL/FpxImagePlugin.py

@@ -237,7 +237,7 @@ class FpxImageFile(ImageFile.ImageFile):
 
         return ImageFile.ImageFile.load(self)
 
-    def close(self):
+    def close(self) -> None:
         self.ole.close()
         super().close()
 

src/PIL/FtexImagePlugin.py

@@ -71,7 +71,7 @@ class FtexImageFile(ImageFile.ImageFile):
     format = "FTEX"
     format_description = "Texture File Format (IW2:EOC)"
 
-    def _open(self):
+    def _open(self) -> None:
         if not _accept(self.fp.read(4)):
             msg = "not an FTEX file"
             raise SyntaxError(msg)
@@ -103,7 +103,7 @@ class FtexImageFile(ImageFile.ImageFile):
         self.fp.close()
         self.fp = BytesIO(data)
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         pass
 
 

src/PIL/GbrImagePlugin.py

@@ -41,7 +41,7 @@ class GbrImageFile(ImageFile.ImageFile):
     format = "GBR"
     format_description = "GIMP brush file"
 
-    def _open(self):
+    def _open(self) -> None:
         header_size = i32(self.fp.read(4))
         if header_size < 20:
             msg = "not a GIMP brush"

src/PIL/GifImagePlugin.py

@@ -76,19 +76,19 @@ class GifImageFile(ImageFile.ImageFile):
 
     global_palette = None
 
-    def data(self):
+    def data(self) -> bytes | None:
         s = self.fp.read(1)
         if s and s[0]:
             return self.fp.read(s[0])
         return None
 
-    def _is_palette_needed(self, p):
+    def _is_palette_needed(self, p: bytes) -> bool:
         for i in range(0, len(p), 3):
             if not (i // 3 == p[i] == p[i + 1] == p[i + 2]):
                 return True
         return False
 
-    def _open(self):
+    def _open(self) -> None:
         # Screen
         s = self.fp.read(13)
         if not _accept(s):
@@ -147,7 +147,7 @@ class GifImageFile(ImageFile.ImageFile):
                     self.seek(current)
         return self._is_animated
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         if frame < self.__frame:
@@ -417,7 +417,7 @@ class GifImageFile(ImageFile.ImageFile):
             elif k in self.info:
                 del self.info[k]
 
-    def load_prepare(self):
+    def load_prepare(self) -> None:
         temp_mode = "P" if self._frame_palette else "L"
         self._prev_im = None
         if self.__frame == 0:
@@ -437,7 +437,7 @@ class GifImageFile(ImageFile.ImageFile):
 
         super().load_prepare()
 
-    def load_end(self):
+    def load_end(self) -> None:
         if self.__frame == 0:
             if self.mode == "P" and LOADING_STRATEGY == LoadingStrategy.RGB_ALWAYS:
                 if self._frame_transparency is not None:
@@ -463,7 +463,7 @@ class GifImageFile(ImageFile.ImageFile):
         else:
             self.im.paste(frame_im, self.dispose_extent)
 
-    def tell(self):
+    def tell(self) -> int:
         return self.__frame
 
 
@@ -474,7 +474,7 @@ class GifImageFile(ImageFile.ImageFile):
 RAWMODE = {"1": "L", "L": "L", "P": "P"}
 
 
-def _normalize_mode(im):
+def _normalize_mode(im: Image.Image) -> Image.Image:
     """
     Takes an image (or frame), returns an image in a mode that is appropriate
     for saving in a Gif.
@@ -887,7 +887,7 @@ def _get_optimize(im, info):
                 return used_palette_colors
 
 
-def _get_color_table_size(palette_bytes):
+def _get_color_table_size(palette_bytes: bytes) -> int:
     # calculate the palette size for the header
     if not palette_bytes:
         return 0
@@ -897,7 +897,7 @@ def _get_color_table_size(palette_bytes):
         return math.ceil(math.log(len(palette_bytes) // 3, 2)) - 1
 
 
-def _get_header_palette(palette_bytes):
+def _get_header_palette(palette_bytes: bytes) -> bytes:
     """
     Returns the palette, null padded to the next power of 2 (*3) bytes
     suitable for direct inclusion in the GIF header
@@ -915,7 +915,7 @@ def _get_header_palette(palette_bytes):
     return palette_bytes
 
 
-def _get_palette_bytes(im):
+def _get_palette_bytes(im: Image.Image) -> bytes:
     """
     Gets the palette for inclusion in the gif header
 

src/PIL/GimpPaletteFile.py

@@ -53,5 +53,5 @@ class GimpPaletteFile:
 
         self.palette = b"".join(self.palette)
 
-    def getpalette(self):
+    def getpalette(self) -> tuple[bytes, str]:
         return self.palette, self.rawmode

src/PIL/GribStubImagePlugin.py

@@ -37,7 +37,7 @@ class GribStubImageFile(ImageFile.StubImageFile):
     format = "GRIB"
     format_description = "GRIB"
 
-    def _open(self):
+    def _open(self) -> None:
         offset = self.fp.tell()
 
         if not _accept(self.fp.read(8)):

src/PIL/Hdf5StubImagePlugin.py

@@ -37,7 +37,7 @@ class HDF5StubImageFile(ImageFile.StubImageFile):
     format = "HDF5"
     format_description = "HDF5"
 
-    def _open(self):
+    def _open(self) -> None:
         offset = self.fp.tell()
 
         if not _accept(self.fp.read(8)):

src/PIL/IcnsImagePlugin.py

@@ -252,7 +252,7 @@ class IcnsImageFile(ImageFile.ImageFile):
     format = "ICNS"
     format_description = "Mac OS icns resource"
 
-    def _open(self):
+    def _open(self) -> None:
         self.icns = IcnsFile(self.fp)
         self._mode = "RGBA"
         self.info["sizes"] = self.icns.itersizes()

src/PIL/IcoImagePlugin.py

@@ -302,7 +302,7 @@ class IcoImageFile(ImageFile.ImageFile):
     format = "ICO"
     format_description = "Windows Icon"
 
-    def _open(self):
+    def _open(self) -> None:
         self.ico = IcoFile(self.fp)
         self.info["sizes"] = self.ico.sizes()
         self.size = self.ico.entry[0]["dim"]
@@ -341,7 +341,7 @@ class IcoImageFile(ImageFile.ImageFile):
 
             self.size = im.size
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         # Flag the ImageFile.Parser so that it
         # just does all the decode at the end.
         pass

src/PIL/ImImagePlugin.py

@@ -119,7 +119,7 @@ class ImImageFile(ImageFile.ImageFile):
     format_description = "IFUNC Image Memory"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         # Quick rejection: if there's not an LF among the first
         # 100 bytes, this is (probably) not a text header.
 
@@ -196,7 +196,7 @@ class ImImageFile(ImageFile.ImageFile):
                     n += 1
 
             else:
-                msg = "Syntax error in IM header: " + s.decode("ascii", "replace")
+                msg = f"Syntax error in IM header: {s.decode('ascii', 'replace')}"
                 raise SyntaxError(msg)
 
         if not n:
@@ -271,14 +271,14 @@ class ImImageFile(ImageFile.ImageFile):
             self.tile = [("raw", (0, 0) + self.size, offs, (self.rawmode, 0, -1))]
 
     @property
-    def n_frames(self):
+    def n_frames(self) -> int:
         return self.info[FRAMES]
 
     @property
-    def is_animated(self):
+    def is_animated(self) -> bool:
         return self.info[FRAMES] > 1
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
 
@@ -296,7 +296,7 @@ class ImImageFile(ImageFile.ImageFile):
 
         self.tile = [("raw", (0, 0) + self.size, offs, (self.rawmode, 0, -1))]
 
-    def tell(self):
+    def tell(self) -> int:
         return self.frame
 
 

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, cast
+from typing import IO, TYPE_CHECKING, Any, Literal, Protocol, Sequence, cast
 
 # VERSION was removed in Pillow 6.0.0.
 # PILLOW_VERSION was removed in Pillow 9.0.0.
@@ -55,6 +55,7 @@ from . import (
     _plugins,
 )
 from ._binary import i32le, o32be, o32le
+from ._deprecate import deprecate
 from ._typing import StrOrBytesPath, TypeGuard
 from ._util import DeferredError, is_path
 
@@ -248,7 +249,28 @@ def _conv_type_shape(im):
     return shape, m.typestr
 
 
-MODES = ["1", "CMYK", "F", "HSV", "I", "L", "LAB", "P", "RGB", "RGBA", "RGBX", "YCbCr"]
+MODES = [
+    "1",
+    "CMYK",
+    "F",
+    "HSV",
+    "I",
+    "I;16",
+    "I;16B",
+    "I;16L",
+    "I;16N",
+    "L",
+    "LA",
+    "La",
+    "LAB",
+    "P",
+    "PA",
+    "RGB",
+    "RGBA",
+    "RGBa",
+    "RGBX",
+    "YCbCr",
+]
 
 # raw modes that may be memory mapped.  NOTE: if you change this, you
 # may have to modify the stride calculation in map.c too!
@@ -404,7 +426,7 @@ def _getdecoder(mode, decoder_name, args, extra=()):
 
     try:
         # get decoder
-        decoder = getattr(core, decoder_name + "_decoder")
+        decoder = getattr(core, f"{decoder_name}_decoder")
     except AttributeError as e:
         msg = f"decoder {decoder_name} not available"
         raise OSError(msg) from e
@@ -427,7 +449,7 @@ def _getencoder(mode, encoder_name, args, extra=()):
 
     try:
         # get encoder
-        encoder = getattr(core, encoder_name + "_encoder")
+        encoder = getattr(core, f"{encoder_name}_encoder")
     except AttributeError as e:
         msg = f"encoder {encoder_name} not available"
         raise OSError(msg) from e
@@ -602,7 +624,7 @@ class Image:
     ) -> str:
         suffix = ""
         if format:
-            suffix = "." + format
+            suffix = f".{format}"
 
         if not file:
             f, filename = tempfile.mkstemp(suffix)
@@ -876,7 +898,7 @@ class Image:
                     return self.pyaccess
             return self.im.pixel_access(self.readonly)
 
-    def verify(self):
+    def verify(self) -> None:
         """
         Verifies the contents of a file. For data read from a file, this
         method attempts to determine if the file is broken, without
@@ -939,6 +961,9 @@ class Image:
         :returns: An :py:class:`~PIL.Image.Image` object.
         """
 
+        if mode in ("BGR;15", "BGR;16", "BGR;24"):
+            deprecate(mode, 12)
+
         self.load()
 
         has_transparency = "transparency" in self.info
@@ -1263,7 +1288,9 @@ class Image:
 
         return im.crop((x0, y0, x1, y1))
 
-    def draft(self, mode, size):
+    def draft(
+        self, mode: str, size: tuple[int, int]
+    ) -> tuple[str, tuple[int, int, float, float]] | None:
         """
         Configures the image file loader so it returns a version of the
         image that as closely as possible matches the given mode and
@@ -1286,13 +1313,16 @@ class Image:
         """
         pass
 
-    def _expand(self, xmargin, ymargin=None):
+    def _expand(self, xmargin: int, ymargin: int | None = None) -> Image:
         if ymargin is None:
             ymargin = xmargin
         self.load()
         return self._new(self.im.expand(xmargin, ymargin))
 
-    def filter(self, filter):
+    if TYPE_CHECKING:
+        from . import ImageFilter
+
+    def filter(self, filter: ImageFilter.Filter | type[ImageFilter.Filter]) -> Image:
         """
         Filters this image using the given filter.  For a list of
         available filters, see the :py:mod:`~PIL.ImageFilter` module.
@@ -1304,7 +1334,7 @@ class Image:
 
         self.load()
 
-        if isinstance(filter, Callable):
+        if callable(filter):
             filter = filter()
         if not hasattr(filter, "filter"):
             msg = "filter argument should be ImageFilter.Filter instance or class"
@@ -2174,7 +2204,7 @@ class Image:
                     (Resampling.HAMMING, "Image.Resampling.HAMMING"),
                 )
             ]
-            msg += " Use " + ", ".join(filters[:-1]) + " or " + filters[-1]
+            msg += f" Use {', '.join(filters[:-1])} or {filters[-1]}"
             raise ValueError(msg)
 
         if reducing_gap is not None and reducing_gap < 1.0:
@@ -2819,7 +2849,7 @@ class Image:
                     (Resampling.BICUBIC, "Image.Resampling.BICUBIC"),
                 )
             ]
-            msg += " Use " + ", ".join(filters[:-1]) + " or " + filters[-1]
+            msg += f" Use {', '.join(filters[:-1])} or {filters[-1]}"
             raise ValueError(msg)
 
         image.load()
@@ -2956,6 +2986,9 @@ def new(
     :returns: An :py:class:`~PIL.Image.Image` object.
     """
 
+    if mode in ("BGR;15", "BGR;16", "BGR;24"):
+        deprecate(mode, 12)
+
     _check_size(size)
 
     if color is None:
@@ -3214,8 +3247,8 @@ _fromarray_typemap = {
     ((1, 1, 3), "|u1"): ("RGB", "RGB"),
     ((1, 1, 4), "|u1"): ("RGBA", "RGBA"),
     # shortcuts:
-    ((1, 1), _ENDIAN + "i4"): ("I", "I"),
+    ((1, 1), f"{_ENDIAN}i4"): ("I", "I"),
-    ((1, 1), _ENDIAN + "f4"): ("F", "F"),
+    ((1, 1), f"{_ENDIAN}f4"): ("F", "F"),
 }
 
 
@@ -3443,7 +3476,7 @@ def eval(image, *args):
     return image.point(args[0])
 
 
-def merge(mode, bands):
+def merge(mode: str, bands: Sequence[Image]) -> Image:
     """
     Merge a set of single band images into a new multiband image.
 

src/PIL/ImageCms.py

@@ -838,8 +838,8 @@ def getProfileName(profile: _CmsProfileCompatible) -> str:
 
         if not (model or manufacturer):
             return (profile.profile.profile_description or "") + "\n"
-        if not manufacturer or len(model) > 30:  # type: ignore[arg-type]
+        if not manufacturer or (model and len(model) > 30):
-            return model + "\n"  # type: ignore[operator]
+            return f"{model}\n"
         return f"{model} - {manufacturer}\n"
 
     except (AttributeError, OSError, TypeError, ValueError) as v:

src/PIL/ImageDraw.py

@@ -34,7 +34,7 @@ from __future__ import annotations
 import math
 import numbers
 import struct
-from typing import Sequence, cast
+from typing import TYPE_CHECKING, Sequence, cast
 
 from . import Image, ImageColor
 from ._typing import Coords
@@ -92,7 +92,10 @@ class ImageDraw:
             self.fontmode = "L"  # aliasing is okay for other modes
         self.fill = False
 
-    def getfont(self):
+    if TYPE_CHECKING:
+        from . import ImageFont
+
+    def getfont(self) -> ImageFont.FreeTypeFont | ImageFont.ImageFont:
         """
         Get the current default font.
 

src/PIL/ImageFile.py

@@ -163,7 +163,7 @@ class ImageFile(Image.Image):
         self.tile = []
         super().__setstate__(state)
 
-    def verify(self):
+    def verify(self) -> None:
         """Check file integrity"""
 
         # raise exception if something's wrong.  must be called
@@ -311,7 +311,7 @@ class ImageFile(Image.Image):
 
         return Image.Image.load(self)
 
-    def load_prepare(self):
+    def load_prepare(self) -> None:
         # create image memory if necessary
         if not self.im or self.im.mode != self.mode or self.im.size != self.size:
             self.im = Image.core.new(self.mode, self.size)
@@ -319,16 +319,16 @@ class ImageFile(Image.Image):
         if self.mode == "P":
             Image.Image.load(self)
 
-    def load_end(self):
+    def load_end(self) -> None:
         # may be overridden
         pass
 
     # may be defined for contained formats
-    # def load_seek(self, pos):
+    # def load_seek(self, pos: int) -> None:
     #     pass
 
     # may be defined for blocked formats (e.g. PNG)
-    # def load_read(self, read_bytes):
+    # def load_read(self, read_bytes: int) -> bytes:
     #     pass
 
     def _seek_check(self, frame):
@@ -390,7 +390,7 @@ class Parser:
     offset = 0
     finished = 0
 
-    def reset(self):
+    def reset(self) -> None:
         """
         (Consumer) Reset the parser.  Note that you can only call this
         method immediately after you've created a parser; parser
@@ -605,7 +605,7 @@ def _safe_read(fp, size):
 
 
 class PyCodecState:
-    def __init__(self):
+    def __init__(self) -> None:
         self.xsize = 0
         self.ysize = 0
         self.xoff = 0
@@ -634,7 +634,7 @@ class PyCodec:
         """
         self.args = args
 
-    def cleanup(self):
+    def cleanup(self) -> None:
         """
         Override to perform codec specific cleanup
 

src/PIL/ImageFilter.py

@@ -16,10 +16,13 @@
 #
 from __future__ import annotations
 
+import abc
 import functools
 
 
 class Filter:
+    @abc.abstractmethod
+    def filter(self, image):
         pass
 
 
@@ -541,7 +544,7 @@ class Color3DLUT(MultibandFilter):
             _copy_table=False,
         )
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         r = [
             f"{self.__class__.__name__} from {self.table.__class__.__name__}",
             "size={:d}x{:d}x{:d}".format(*self.size),

src/PIL/ImageMath.py

@@ -61,7 +61,7 @@ class _Operand:
             out = Image.new(mode or im_1.mode, im_1.size, None)
             im_1.load()
             try:
-                op = getattr(_imagingmath, op + "_" + im_1.mode)
+                op = getattr(_imagingmath, f"{op}_{im_1.mode}")
             except AttributeError as e:
                 msg = f"bad operand type for '{op}'"
                 raise TypeError(msg) from e
@@ -89,7 +89,7 @@ class _Operand:
             im_1.load()
             im_2.load()
             try:
-                op = getattr(_imagingmath, op + "_" + im_1.mode)
+                op = getattr(_imagingmath, f"{op}_{im_1.mode}")
             except AttributeError as e:
                 msg = f"bad operand type for '{op}'"
                 raise TypeError(msg) from e

src/PIL/ImageMode.py

@@ -18,6 +18,8 @@ import sys
 from functools import lru_cache
 from typing import NamedTuple
 
+from ._deprecate import deprecate
+
 
 class ModeDescriptor(NamedTuple):
     """Wrapper for mode strings."""
@@ -42,8 +44,8 @@ def getmode(mode: str) -> ModeDescriptor:
         # Bits need to be extended to bytes
         "1": ("L", "L", ("1",), "|b1"),
         "L": ("L", "L", ("L",), "|u1"),
-        "I": ("L", "I", ("I",), endian + "i4"),
+        "I": ("L", "I", ("I",), f"{endian}i4"),
-        "F": ("L", "F", ("F",), endian + "f4"),
+        "F": ("L", "F", ("F",), f"{endian}f4"),
         "P": ("P", "L", ("P",), "|u1"),
         "RGB": ("RGB", "L", ("R", "G", "B"), "|u1"),
         "RGBX": ("RGB", "L", ("R", "G", "B", "X"), "|u1"),
@@ -63,6 +65,8 @@ def getmode(mode: str) -> ModeDescriptor:
         "PA": ("RGB", "L", ("P", "A"), "|u1"),
     }
     if mode in modes:
+        if mode in ("BGR;15", "BGR;16", "BGR;24"):
+            deprecate(mode, 12)
         base_mode, base_type, bands, type_str = modes[mode]
         return ModeDescriptor(mode, bands, base_mode, base_type, type_str)
 
@@ -74,8 +78,8 @@ def getmode(mode: str) -> ModeDescriptor:
         "I;16LS": "<i2",
         "I;16B": ">u2",
         "I;16BS": ">i2",
-        "I;16N": endian + "u2",
+        "I;16N": f"{endian}u2",
-        "I;16NS": endian + "i2",
+        "I;16NS": f"{endian}i2",
         "I;32": "<u4",
         "I;32B": ">u4",
         "I;32L": "<u4",

src/PIL/ImageMorph.py

@@ -84,7 +84,7 @@ class LutBuilder:
                 ],
             }
             if op_name not in known_patterns:
-                msg = "Unknown pattern " + op_name + "!"
+                msg = f"Unknown pattern {op_name}!"
                 raise Exception(msg)
 
             self.patterns = known_patterns[op_name]

src/PIL/ImagePalette.py

@@ -66,7 +66,7 @@ class ImagePalette:
     def colors(self, colors):
         self._colors = colors
 
-    def copy(self):
+    def copy(self) -> ImagePalette:
         new = ImagePalette()
 
         new.mode = self.mode
@@ -77,7 +77,7 @@ class ImagePalette:
 
         return new
 
-    def getdata(self):
+    def getdata(self) -> tuple[str, bytes]:
         """
         Get palette contents in format suitable for the low-level
         ``im.putpalette`` primitive.
@@ -88,7 +88,7 @@ class ImagePalette:
             return self.rawmode, self.palette
         return self.mode, self.tobytes()
 
-    def tobytes(self):
+    def tobytes(self) -> bytes:
         """Convert palette to bytes.
 
         .. warning:: This method is experimental.

src/PIL/ImageTk.py

@@ -128,7 +128,7 @@ class PhotoImage:
         if image:
             self.paste(image)
 
-    def __del__(self):
+    def __del__(self) -> None:
         name = self.__photo.name
         self.__photo.name = None
         try:
@@ -136,7 +136,7 @@ class PhotoImage:
         except Exception:
             pass  # ignore internal errors
 
-    def __str__(self):
+    def __str__(self) -> str:
         """
         Get the Tkinter photo image identifier.  This method is automatically
         called by Tkinter whenever a PhotoImage object is passed to a Tkinter
@@ -146,7 +146,7 @@ class PhotoImage:
         """
         return str(self.__photo)
 
-    def width(self):
+    def width(self) -> int:
         """
         Get the width of the image.
 
@@ -154,7 +154,7 @@ class PhotoImage:
         """
         return self.__size[0]
 
-    def height(self):
+    def height(self) -> int:
         """
         Get the height of the image.
 
@@ -219,7 +219,7 @@ class BitmapImage:
             kw["data"] = image.tobitmap()
         self.__photo = tkinter.BitmapImage(**kw)
 
-    def __del__(self):
+    def __del__(self) -> None:
         name = self.__photo.name
         self.__photo.name = None
         try:
@@ -227,7 +227,7 @@ class BitmapImage:
         except Exception:
             pass  # ignore internal errors
 
-    def width(self):
+    def width(self) -> int:
         """
         Get the width of the image.
 
@@ -235,7 +235,7 @@ class BitmapImage:
         """
         return self.__size[0]
 
-    def height(self):
+    def height(self) -> int:
         """
         Get the height of the image.
 
@@ -243,7 +243,7 @@ class BitmapImage:
         """
         return self.__size[1]
 
-    def __str__(self):
+    def __str__(self) -> str:
         """
         Get the Tkinter bitmap image identifier.  This method is automatically
         called by Tkinter whenever a BitmapImage object is passed to a Tkinter

src/PIL/ImageWin.py

@@ -196,7 +196,7 @@ class Window:
         )
 
     def __dispatcher(self, action, *args):
-        return getattr(self, "ui_handle_" + action)(*args)
+        return getattr(self, f"ui_handle_{action}")(*args)
 
     def ui_handle_clear(self, dc, x0, y0, x1, y1):
         pass
@@ -204,7 +204,7 @@ class Window:
     def ui_handle_damage(self, x0, y0, x1, y1):
         pass
 
-    def ui_handle_destroy(self):
+    def ui_handle_destroy(self) -> None:
         pass
 
     def ui_handle_repair(self, dc, x0, y0, x1, y1):
@@ -213,7 +213,7 @@ class Window:
     def ui_handle_resize(self, width, height):
         pass
 
-    def mainloop(self):
+    def mainloop(self) -> None:
         Image.core.eventloop()
 
 

src/PIL/IptcImagePlugin.py

@@ -57,7 +57,7 @@ def dump(c: Sequence[int | bytes]) -> None:
     """.. deprecated:: 10.2.0"""
     deprecate("IptcImagePlugin.dump", 12)
     for i in c:
-        print("%02x" % _i8(i), end=" ")
+        print(f"{_i8(i):02x}", end=" ")
     print()
 
 

src/PIL/Jpeg2KImagePlugin.py

@@ -63,12 +63,12 @@ class BoxReader:
         data = self._read_bytes(size)
         return struct.unpack(field_format, data)
 
-    def read_boxes(self):
+    def read_boxes(self) -> BoxReader:
         size = self.remaining_in_box
         data = self._read_bytes(size)
         return BoxReader(io.BytesIO(data), size)
 
-    def has_next_box(self):
+    def has_next_box(self) -> bool:
         if self.has_length:
             return self.fp.tell() + self.remaining_in_box < self.length
         else:
@@ -215,7 +215,7 @@ class Jpeg2KImageFile(ImageFile.ImageFile):
     format = "JPEG2000"
     format_description = "JPEG 2000 (ISO 15444)"
 
-    def _open(self):
+    def _open(self) -> None:
         sig = self.fp.read(4)
         if sig == b"\xff\x4f\xff\x51":
             self.codec = "j2k"
@@ -267,7 +267,7 @@ class Jpeg2KImageFile(ImageFile.ImageFile):
             )
         ]
 
-    def _parse_comment(self):
+    def _parse_comment(self) -> None:
         hdr = self.fp.read(2)
         length = _binary.i16be(hdr)
         self.fp.seek(length - 2, os.SEEK_CUR)

src/PIL/JpegImagePlugin.py

@@ -408,7 +408,7 @@ class JpegImageFile(ImageFile.ImageFile):
                 msg = "no marker found"
                 raise SyntaxError(msg)
 
-    def load_read(self, read_bytes):
+    def load_read(self, read_bytes: int) -> bytes:
         """
         internal: read more image data
         For premature EOF and LOAD_TRUNCATED_IMAGES adds EOI marker
@@ -424,13 +424,15 @@ class JpegImageFile(ImageFile.ImageFile):
 
         return s
 
-    def draft(self, mode, size):
+    def draft(
+        self, mode: str, size: tuple[int, int]
+    ) -> tuple[str, tuple[int, int, float, float]] | None:
         if len(self.tile) != 1:
-            return
+            return None
 
         # Protect from second call
         if self.decoderconfig:
-            return
+            return None
 
         d, e, o, a = self.tile[0]
         scale = 1
@@ -460,7 +462,7 @@ class JpegImageFile(ImageFile.ImageFile):
         box = (0, 0, original_size[0] / scale, original_size[1] / scale)
         return self.mode, box
 
-    def load_djpeg(self):
+    def load_djpeg(self) -> None:
         # ALTERNATIVE: handle JPEGs via the IJG command line utilities
 
         f, path = tempfile.mkstemp()

src/PIL/MicImagePlugin.py

@@ -38,7 +38,7 @@ class MicImageFile(TiffImagePlugin.TiffImageFile):
     format_description = "Microsoft Image Composer"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         # read the OLE directory and see if this is a likely
         # to be a Microsoft Image Composer file
 
@@ -88,7 +88,7 @@ class MicImageFile(TiffImagePlugin.TiffImageFile):
     def tell(self):
         return self.frame
 
-    def close(self):
+    def close(self) -> None:
         self.__fp.close()
         self.ole.close()
         super().close()

src/PIL/MpegImagePlugin.py

@@ -53,6 +53,10 @@ class BitStream:
         return v
 
 
+def _accept(prefix: bytes) -> bool:
+    return prefix[:4] == b"\x00\x00\x01\xb3"
+
+
 ##
 # Image plugin for MPEG streams.  This plugin can identify a stream,
 # but it cannot read it.
@@ -77,7 +81,7 @@ class MpegImageFile(ImageFile.ImageFile):
 # --------------------------------------------------------------------
 # Registry stuff
 
-Image.register_open(MpegImageFile.format, MpegImageFile)
+Image.register_open(MpegImageFile.format, MpegImageFile, _accept)
 
 Image.register_extensions(MpegImageFile.format, [".mpg", ".mpeg"])
 

src/PIL/MpoImagePlugin.py

@@ -100,7 +100,7 @@ class MpoImageFile(JpegImagePlugin.JpegImageFile):
     format_description = "MPO (CIPA DC-007)"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         self.fp.seek(0)  # prep the fp in order to pass the JPEG test
         JpegImagePlugin.JpegImageFile._open(self)
         self._after_jpeg_open()
@@ -124,10 +124,10 @@ class MpoImageFile(JpegImagePlugin.JpegImageFile):
         # for now we can only handle reading and individual frame extraction
         self.readonly = 1
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         self._fp.seek(pos)
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         self.fp = self._fp
@@ -149,7 +149,7 @@ class MpoImageFile(JpegImagePlugin.JpegImageFile):
         self.tile = [("jpeg", (0, 0) + self.size, self.offset, self.tile[0][-1])]
         self.__frame = frame
 
-    def tell(self):
+    def tell(self) -> int:
         return self.__frame
 
     @staticmethod

src/PIL/PSDraw.py

@@ -54,7 +54,7 @@ class PSDraw:
         self.fp.write(b"%%EndProlog\n")
         self.isofont = {}
 
-    def end_document(self):
+    def end_document(self) -> None:
         """Ends printing. (Write PostScript DSC footer.)"""
         self.fp.write(b"%%EndDocument\nrestore showpage\n%%End\n")
         if hasattr(self.fp, "flush"):

src/PIL/PalmImagePlugin.py

@@ -142,7 +142,7 @@ def _save(im, fp, filename):
 
         # we ignore the palette here
         im.mode = "P"
-        rawmode = "P;" + str(bpp)
+        rawmode = f"P;{bpp}"
         version = 1
 
     elif im.mode == "1":

src/PIL/PdfParser.py

@@ -87,10 +87,10 @@ class IndirectReferenceTuple(NamedTuple):
 
 
 class IndirectReference(IndirectReferenceTuple):
-    def __str__(self):
+    def __str__(self) -> str:
         return f"{self.object_id} {self.generation} R"
 
-    def __bytes__(self):
+    def __bytes__(self) -> bytes:
         return self.__str__().encode("us-ascii")
 
     def __eq__(self, other):
@@ -108,7 +108,7 @@ class IndirectReference(IndirectReferenceTuple):
 
 
 class IndirectObjectDef(IndirectReference):
-    def __str__(self):
+    def __str__(self) -> str:
         return f"{self.object_id} {self.generation} obj"
 
 
@@ -144,15 +144,13 @@ class XrefTable:
         elif key in self.deleted_entries:
             generation = self.deleted_entries[key]
         else:
-            msg = (
+            msg = f"object ID {key} cannot be deleted because it doesn't exist"
-                "object ID " + str(key) + " cannot be deleted because it doesn't exist"
-            )
             raise IndexError(msg)
 
     def __contains__(self, key):
         return key in self.existing_entries or key in self.new_entries
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(
             set(self.existing_entries.keys())
             | set(self.new_entries.keys())
@@ -213,7 +211,7 @@ class PdfName:
         else:
             self.name = name.encode("us-ascii")
 
-    def name_as_str(self):
+    def name_as_str(self) -> str:
         return self.name.decode("us-ascii")
 
     def __eq__(self, other):
@@ -224,8 +222,8 @@ class PdfName:
     def __hash__(self):
         return hash(self.name)
 
-    def __repr__(self):
+    def __repr__(self) -> str:
-        return f"PdfName({repr(self.name)})"
+        return f"{self.__class__.__name__}({repr(self.name)})"
 
     @classmethod
     def from_pdf_stream(cls, data):
@@ -233,7 +231,7 @@ class PdfName:
 
     allowed_chars = set(range(33, 127)) - {ord(c) for c in "#%/()<>[]{}"}
 
-    def __bytes__(self):
+    def __bytes__(self) -> bytes:
         result = bytearray(b"/")
         for b in self.name:
             if b in self.allowed_chars:
@@ -244,7 +242,7 @@ class PdfName:
 
 
 class PdfArray(List[Any]):
-    def __bytes__(self):
+    def __bytes__(self) -> bytes:
         return b"[ " + b" ".join(pdf_repr(x) for x in self) + b" ]"
 
 
@@ -288,7 +286,7 @@ class PdfDict(_DictBase):
                 value = time.gmtime(calendar.timegm(value) + offset)
         return value
 
-    def __bytes__(self):
+    def __bytes__(self) -> bytes:
         out = bytearray(b"<<")
         for key, value in self.items():
             if value is None:
@@ -306,7 +304,7 @@ class PdfBinary:
     def __init__(self, data):
         self.data = data
 
-    def __bytes__(self):
+    def __bytes__(self) -> bytes:
         return b"<%s>" % b"".join(b"%02X" % b for b in self.data)
 
 
@@ -411,28 +409,28 @@ class PdfParser:
         self.close()
         return False  # do not suppress exceptions
 
-    def start_writing(self):
+    def start_writing(self) -> None:
         self.close_buf()
         self.seek_end()
 
-    def close_buf(self):
+    def close_buf(self) -> None:
         try:
             self.buf.close()
         except AttributeError:
             pass
         self.buf = None
 
-    def close(self):
+    def close(self) -> None:
         if self.should_close_buf:
             self.close_buf()
         if self.f is not None and self.should_close_file:
             self.f.close()
             self.f = None
 
-    def seek_end(self):
+    def seek_end(self) -> None:
         self.f.seek(0, os.SEEK_END)
 
-    def write_header(self):
+    def write_header(self) -> None:
         self.f.write(b"%PDF-1.4\n")
 
     def write_comment(self, s):
@@ -452,7 +450,7 @@ class PdfParser:
         )
         return self.root_ref
 
-    def rewrite_pages(self):
+    def rewrite_pages(self) -> None:
         pages_tree_nodes_to_delete = []
         for i, page_ref in enumerate(self.orig_pages):
             page_info = self.cached_objects[page_ref]
@@ -531,7 +529,7 @@ class PdfParser:
         f.write(b"endobj\n")
         return ref
 
-    def del_root(self):
+    def del_root(self) -> None:
         if self.root_ref is None:
             return
         del self.xref_table[self.root_ref.object_id]
@@ -549,7 +547,7 @@ class PdfParser:
             except ValueError:  # cannot mmap an empty file
                 return b""
 
-    def read_pdf_info(self):
+    def read_pdf_info(self) -> None:
         self.file_size_total = len(self.buf)
         self.file_size_this = self.file_size_total - self.start_offset
         self.read_trailer()
@@ -825,11 +823,10 @@ class PdfParser:
             m = cls.re_stream_start.match(data, offset)
             if m:
                 try:
-                    stream_len = int(result[b"Length"])
+                    stream_len_str = result.get(b"Length")
-                except (TypeError, KeyError, ValueError) as e:
+                    stream_len = int(stream_len_str)
-                    msg = "bad or missing Length in stream dict (%r)" % result.get(
+                except (TypeError, ValueError) as e:
-                        b"Length", None
+                    msg = f"bad or missing Length in stream dict ({stream_len_str})"
-                    )
                     raise PdfFormatError(msg) from e
                 stream_data = data[m.end() : m.end() + stream_len]
                 m = cls.re_stream_end.match(data, m.end() + stream_len)
@@ -884,7 +881,7 @@ class PdfParser:
         if m:
             return cls.get_literal_string(data, m.end())
         # return None, offset  # fallback (only for debugging)
-        msg = "unrecognized object: " + repr(data[offset : offset + 32])
+        msg = f"unrecognized object: {repr(data[offset : offset + 32])}"
         raise PdfFormatError(msg)
 
     re_lit_str_token = re.compile(

src/PIL/PngImagePlugin.py

@@ -39,6 +39,7 @@ import struct
 import warnings
 import zlib
 from enum import IntEnum
+from typing import IO
 
 from . import Image, ImageChops, ImageFile, ImagePalette, ImageSequence
 from ._binary import i16be as i16
@@ -149,14 +150,15 @@ def _crc32(data, seed=0):
 
 
 class ChunkStream:
-    def __init__(self, fp):
+    def __init__(self, fp: IO[bytes]) -> None:
-        self.fp = fp
+        self.fp: IO[bytes] | None = fp
-        self.queue = []
+        self.queue: list[tuple[bytes, int, int]] | None = []
 
-    def read(self):
+    def read(self) -> tuple[bytes, int, int]:
         """Fetch a new chunk. Returns header information."""
         cid = None
 
+        assert self.fp is not None
         if self.queue:
             cid, pos, length = self.queue.pop()
             self.fp.seek(pos)
@@ -173,25 +175,26 @@ class ChunkStream:
 
         return cid, pos, length
 
-    def __enter__(self):
+    def __enter__(self) -> ChunkStream:
         return self
 
     def __exit__(self, *args):
         self.close()
 
-    def close(self):
+    def close(self) -> None:
         self.queue = self.fp = None
 
-    def push(self, cid, pos, length):
+    def push(self, cid: bytes, pos: int, length: int) -> None:
+        assert self.queue is not None
         self.queue.append((cid, pos, length))
 
     def call(self, cid, pos, length):
         """Call the appropriate chunk handler"""
 
         logger.debug("STREAM %r %s %s", cid, pos, length)
-        return getattr(self, "chunk_" + cid.decode("ascii"))(pos, length)
+        return getattr(self, f"chunk_{cid.decode('ascii')}")(pos, length)
 
-    def crc(self, cid, data):
+    def crc(self, cid: bytes, data: bytes) -> None:
         """Read and verify checksum"""
 
         # Skip CRC checks for ancillary chunks if allowed to load truncated
@@ -201,6 +204,7 @@ class ChunkStream:
             self.crc_skip(cid, data)
             return
 
+        assert self.fp is not None
         try:
             crc1 = _crc32(data, _crc32(cid))
             crc2 = i32(self.fp.read(4))
@@ -211,12 +215,13 @@ class ChunkStream:
             msg = f"broken PNG file (incomplete checksum in {repr(cid)})"
             raise SyntaxError(msg) from e
 
-    def crc_skip(self, cid, data):
+    def crc_skip(self, cid: bytes, data: bytes) -> None:
         """Read checksum"""
 
+        assert self.fp is not None
         self.fp.read(4)
 
-    def verify(self, endchunk=b"IEND"):
+    def verify(self, endchunk: bytes = b"IEND") -> list[bytes]:
         # Simple approach; just calculate checksum for all remaining
         # blocks.  Must be called directly after open.
 
@@ -361,7 +366,7 @@ class PngStream(ChunkStream):
 
         self.text_memory = 0
 
-    def check_text_memory(self, chunklen):
+    def check_text_memory(self, chunklen: int) -> None:
         self.text_memory += chunklen
         if self.text_memory > MAX_TEXT_MEMORY:
             msg = (
@@ -370,19 +375,19 @@ class PngStream(ChunkStream):
             )
             raise ValueError(msg)
 
-    def save_rewind(self):
+    def save_rewind(self) -> None:
         self.rewind_state = {
             "info": self.im_info.copy(),
             "tile": self.im_tile,
             "seq_num": self._seq_num,
         }
 
-    def rewind(self):
+    def rewind(self) -> None:
         self.im_info = self.rewind_state["info"].copy()
         self.im_tile = self.rewind_state["tile"]
         self._seq_num = self.rewind_state["seq_num"]
 
-    def chunk_iCCP(self, pos, length):
+    def chunk_iCCP(self, pos: int, length: int) -> bytes:
         # ICC profile
         s = ImageFile._safe_read(self.fp, length)
         # according to PNG spec, the iCCP chunk contains:
@@ -409,7 +414,7 @@ class PngStream(ChunkStream):
         self.im_info["icc_profile"] = icc_profile
         return s
 
-    def chunk_IHDR(self, pos, length):
+    def chunk_IHDR(self, pos: int, length: int) -> bytes:
         # image header
         s = ImageFile._safe_read(self.fp, length)
         if length < 13:
@@ -446,14 +451,14 @@ class PngStream(ChunkStream):
         msg = "end of PNG image"
         raise EOFError(msg)
 
-    def chunk_PLTE(self, pos, length):
+    def chunk_PLTE(self, pos: int, length: int) -> bytes:
         # palette
         s = ImageFile._safe_read(self.fp, length)
         if self.im_mode == "P":
             self.im_palette = "RGB", s
         return s
 
-    def chunk_tRNS(self, pos, length):
+    def chunk_tRNS(self, pos: int, length: int) -> bytes:
         # transparency
         s = ImageFile._safe_read(self.fp, length)
         if self.im_mode == "P":
@@ -473,13 +478,13 @@ class PngStream(ChunkStream):
             self.im_info["transparency"] = i16(s), i16(s, 2), i16(s, 4)
         return s
 
-    def chunk_gAMA(self, pos, length):
+    def chunk_gAMA(self, pos: int, length: int) -> bytes:
         # gamma setting
         s = ImageFile._safe_read(self.fp, length)
         self.im_info["gamma"] = i32(s) / 100000.0
         return s
 
-    def chunk_cHRM(self, pos, length):
+    def chunk_cHRM(self, pos: int, length: int) -> bytes:
         # chromaticity, 8 unsigned ints, actual value is scaled by 100,000
         # WP x,y, Red x,y, Green x,y Blue x,y
 
@@ -488,7 +493,7 @@ class PngStream(ChunkStream):
         self.im_info["chromaticity"] = tuple(elt / 100000.0 for elt in raw_vals)
         return s
 
-    def chunk_sRGB(self, pos, length):
+    def chunk_sRGB(self, pos: int, length: int) -> bytes:
         # srgb rendering intent, 1 byte
         # 0 perceptual
         # 1 relative colorimetric
@@ -504,7 +509,7 @@ class PngStream(ChunkStream):
         self.im_info["srgb"] = s[0]
         return s
 
-    def chunk_pHYs(self, pos, length):
+    def chunk_pHYs(self, pos: int, length: int) -> bytes:
         # pixels per unit
         s = ImageFile._safe_read(self.fp, length)
         if length < 9:
@@ -521,7 +526,7 @@ class PngStream(ChunkStream):
             self.im_info["aspect"] = px, py
         return s
 
-    def chunk_tEXt(self, pos, length):
+    def chunk_tEXt(self, pos: int, length: int) -> bytes:
         # text
         s = ImageFile._safe_read(self.fp, length)
         try:
@@ -540,7 +545,7 @@ class PngStream(ChunkStream):
 
         return s
 
-    def chunk_zTXt(self, pos, length):
+    def chunk_zTXt(self, pos: int, length: int) -> bytes:
         # compressed text
         s = ImageFile._safe_read(self.fp, length)
         try:
@@ -574,7 +579,7 @@ class PngStream(ChunkStream):
 
         return s
 
-    def chunk_iTXt(self, pos, length):
+    def chunk_iTXt(self, pos: int, length: int) -> bytes:
         # international text
         r = s = ImageFile._safe_read(self.fp, length)
         try:
@@ -614,13 +619,13 @@ class PngStream(ChunkStream):
 
         return s
 
-    def chunk_eXIf(self, pos, length):
+    def chunk_eXIf(self, pos: int, length: int) -> bytes:
         s = ImageFile._safe_read(self.fp, length)
         self.im_info["exif"] = b"Exif\x00\x00" + s
         return s
 
     # APNG chunks
-    def chunk_acTL(self, pos, length):
+    def chunk_acTL(self, pos: int, length: int) -> bytes:
         s = ImageFile._safe_read(self.fp, length)
         if length < 8:
             if ImageFile.LOAD_TRUNCATED_IMAGES:
@@ -640,7 +645,7 @@ class PngStream(ChunkStream):
         self.im_custom_mimetype = "image/apng"
         return s
 
-    def chunk_fcTL(self, pos, length):
+    def chunk_fcTL(self, pos: int, length: int) -> bytes:
         s = ImageFile._safe_read(self.fp, length)
         if length < 26:
             if ImageFile.LOAD_TRUNCATED_IMAGES:
@@ -669,7 +674,7 @@ class PngStream(ChunkStream):
         self.im_info["blend"] = s[25]
         return s
 
-    def chunk_fdAT(self, pos, length):
+    def chunk_fdAT(self, pos: int, length: int) -> bytes:
         if length < 4:
             if ImageFile.LOAD_TRUNCATED_IMAGES:
                 s = ImageFile._safe_read(self.fp, length)
@@ -701,7 +706,7 @@ class PngImageFile(ImageFile.ImageFile):
     format = "PNG"
     format_description = "Portable network graphics"
 
-    def _open(self):
+    def _open(self) -> None:
         if not _accept(self.fp.read(8)):
             msg = "not a PNG file"
             raise SyntaxError(msg)
@@ -711,8 +716,8 @@ class PngImageFile(ImageFile.ImageFile):
         #
         # Parse headers up to the first IDAT or fDAT chunk
 
-        self.private_chunks = []
+        self.private_chunks: list[tuple[bytes, bytes] | tuple[bytes, bytes, bool]] = []
-        self.png = PngStream(self.fp)
+        self.png: PngStream | None = PngStream(self.fp)
 
         while True:
             #
@@ -783,7 +788,7 @@ class PngImageFile(ImageFile.ImageFile):
                 self.seek(frame)
         return self._text
 
-    def verify(self):
+    def verify(self) -> None:
         """Verify PNG file"""
 
         if self.fp is None:
@@ -793,6 +798,7 @@ class PngImageFile(ImageFile.ImageFile):
         # back up to beginning of IDAT block
         self.fp.seek(self.tile[0][2] - 8)
 
+        assert self.png is not None
         self.png.verify()
         self.png.close()
 
@@ -800,7 +806,7 @@ class PngImageFile(ImageFile.ImageFile):
             self.fp.close()
         self.fp = None
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         if frame < self.__frame:
@@ -909,10 +915,10 @@ class PngImageFile(ImageFile.ImageFile):
         else:
             self.dispose = None
 
-    def tell(self):
+    def tell(self) -> int:
         return self.__frame
 
-    def load_prepare(self):
+    def load_prepare(self) -> None:
         """internal: prepare to read PNG file"""
 
         if self.info.get("interlace"):
@@ -921,9 +927,10 @@ class PngImageFile(ImageFile.ImageFile):
         self.__idat = self.__prepare_idat  # used by load_read()
         ImageFile.ImageFile.load_prepare(self)
 
-    def load_read(self, read_bytes):
+    def load_read(self, read_bytes: int) -> bytes:
         """internal: read more image data"""
 
+        assert self.png is not None
         while self.__idat == 0:
             # end of chunk, skip forward to next one
 
@@ -954,8 +961,9 @@ class PngImageFile(ImageFile.ImageFile):
 
         return self.fp.read(read_bytes)
 
-    def load_end(self):
+    def load_end(self) -> None:
         """internal: finished reading image data"""
+        assert self.png is not None
         if self.__idat != 0:
             self.fp.read(self.__idat)
         while True:
@@ -1079,7 +1087,7 @@ class _idat:
         self.fp = fp
         self.chunk = chunk
 
-    def write(self, data):
+    def write(self, data: bytes) -> None:
         self.chunk(self.fp, b"IDAT", data)
 
 
@@ -1091,7 +1099,7 @@ class _fdat:
         self.chunk = chunk
         self.seq_num = seq_num
 
-    def write(self, data):
+    def write(self, data: bytes) -> None:
         self.chunk(self.fp, b"fdAT", o32(self.seq_num), data)
         self.seq_num += 1
 
@@ -1436,10 +1444,10 @@ def getchunks(im, **params):
     class collector:
         data = []
 
-        def write(self, data):
+        def write(self, data: bytes) -> None:
             pass
 
-        def append(self, chunk):
+        def append(self, chunk: bytes) -> None:
             self.data.append(chunk)
 
     def append(fp, cid, *data):

src/PIL/PsdImagePlugin.py

@@ -57,7 +57,7 @@ class PsdImageFile(ImageFile.ImageFile):
     format_description = "Adobe Photoshop"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         read = self.fp.read
 
         #
@@ -141,23 +141,22 @@ class PsdImageFile(ImageFile.ImageFile):
         self.frame = 1
         self._min_frame = 1
 
-    def seek(self, layer):
+    def seek(self, layer: int) -> None:
         if not self._seek_check(layer):
             return
 
         # seek to given layer (1..max)
         try:
-            name, mode, bbox, tile = self.layers[layer - 1]
+            _, mode, _, tile = self.layers[layer - 1]
             self._mode = mode
             self.tile = tile
             self.frame = layer
             self.fp = self._fp
-            return name, bbox
         except IndexError as e:
             msg = "no such layer"
             raise EOFError(msg) from e
 
-    def tell(self):
+    def tell(self) -> int:
         # return layer number (0=image, 1..max=layers)
         return self.frame
 

src/PIL/PyAccess.py

@@ -70,7 +70,7 @@ class PyAccess:
         # logger.debug("%s", vals)
         self._post_init()
 
-    def _post_init(self):
+    def _post_init(self) -> None:
         pass
 
     def __setitem__(self, xy, color):

src/PIL/QoiImagePlugin.py

@@ -21,7 +21,7 @@ class QoiImageFile(ImageFile.ImageFile):
     format = "QOI"
     format_description = "Quite OK Image"
 
-    def _open(self):
+    def _open(self) -> None:
         if not _accept(self.fp.read(4)):
             msg = "not a QOI file"
             raise SyntaxError(msg)

src/PIL/SpiderImagePlugin.py

@@ -37,6 +37,7 @@ from __future__ import annotations
 import os
 import struct
 import sys
+from typing import TYPE_CHECKING
 
 from . import Image, ImageFile
 
@@ -97,7 +98,7 @@ class SpiderImageFile(ImageFile.ImageFile):
     format_description = "Spider 2D image"
     _close_exclusive_fp_after_loading = False
 
-    def _open(self):
+    def _open(self) -> None:
         # check header
         n = 27 * 4  # read 27 float values
         f = self.fp.read(n)
@@ -157,21 +158,21 @@ class SpiderImageFile(ImageFile.ImageFile):
         self._fp = self.fp  # FIXME: hack
 
     @property
-    def n_frames(self):
+    def n_frames(self) -> int:
         return self._nimages
 
     @property
-    def is_animated(self):
+    def is_animated(self) -> bool:
         return self._nimages > 1
 
     # 1st image index is zero (although SPIDER imgnumber starts at 1)
-    def tell(self):
+    def tell(self) -> int:
         if self.imgnumber < 1:
             return 0
         else:
             return self.imgnumber - 1
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if self.istack == 0:
             msg = "attempt to seek in a non-stack file"
             raise EOFError(msg)
@@ -191,8 +192,11 @@ class SpiderImageFile(ImageFile.ImageFile):
         b = -m * minimum
         return self.point(lambda i, m=m, b=b: i * m + b).convert("L")
 
+    if TYPE_CHECKING:
+        from . import ImageTk
+
     # returns a ImageTk.PhotoImage object, after rescaling to 0..255
-    def tkPhotoImage(self):
+    def tkPhotoImage(self) -> ImageTk.PhotoImage:
         from . import ImageTk
 
         return ImageTk.PhotoImage(self.convert2byte(), palette=256)
@@ -218,7 +222,7 @@ def loadImageSeries(filelist=None):
                 im = im.convert2byte()
         except Exception:
             if not isSpiderImage(img):
-                print(img + " is not a Spider image file")
+                print(f"{img} is not a Spider image file")
             continue
         im.info["filename"] = img
         imglist.append(im)
@@ -299,10 +303,10 @@ if __name__ == "__main__":
         sys.exit()
 
     with Image.open(filename) as im:
-        print("image: " + str(im))
+        print(f"image: {im}")
-        print("format: " + str(im.format))
+        print(f"format: {im.format}")
-        print("size: " + str(im.size))
+        print(f"size: {im.size}")
-        print("mode: " + str(im.mode))
+        print(f"mode: {im.mode}")
         print("max, min: ", end=" ")
         print(im.getextrema())
 

src/PIL/TiffImagePlugin.py

@@ -56,6 +56,7 @@ from . import ExifTags, Image, ImageFile, ImageOps, ImagePalette, TiffTags
 from ._binary import i16be as i16
 from ._binary import i32be as i32
 from ._binary import o8
+from ._deprecate import deprecate
 from .TiffTags import TYPES
 
 logger = logging.getLogger(__name__)
@@ -244,6 +245,7 @@ OPEN_INFO = {
     (MM, 3, (1,), 2, (4,), ()): ("P", "P;4R"),
     (II, 3, (1,), 1, (8,), ()): ("P", "P"),
     (MM, 3, (1,), 1, (8,), ()): ("P", "P"),
+    (II, 3, (1,), 1, (8, 8), (0,)): ("P", "PX"),
     (II, 3, (1,), 1, (8, 8), (2,)): ("PA", "PA"),
     (MM, 3, (1,), 1, (8, 8), (2,)): ("PA", "PA"),
     (II, 3, (1,), 2, (8,), ()): ("P", "P;R"),
@@ -276,6 +278,9 @@ PREFIXES = [
     b"II\x2B\x00",  # BigTIFF with little-endian byte order
 ]
 
+if not getattr(Image.core, "libtiff_support_custom_tags", True):
+    deprecate("Support for LibTIFF earlier than version 4", 12)
+
 
 def _accept(prefix: bytes) -> bool:
     return prefix[:4] in PREFIXES
@@ -376,7 +381,7 @@ class IFDRational(Rational):
         f = self._val.limit_denominator(max_denominator)
         return f.numerator, f.denominator
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         return str(float(self._val))
 
     def __hash__(self):
@@ -464,7 +469,7 @@ def _register_basic(idx_fmt_name):
 
     idx, fmt, name = idx_fmt_name
     TYPES[idx] = name
-    size = struct.calcsize("=" + fmt)
+    size = struct.calcsize(f"={fmt}")
     _load_dispatch[idx] = (  # noqa: F821
         size,
         lambda self, data, legacy_api=True: (
@@ -598,7 +603,7 @@ class ImageFileDirectory_v2(_IFDv2Base):
         self._next = None
         self._offset = None
 
-    def __str__(self):
+    def __str__(self) -> str:
         return str(dict(self))
 
     def named(self):
@@ -612,7 +617,7 @@ class ImageFileDirectory_v2(_IFDv2Base):
             for code, value in self.items()
         }
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(set(self._tagdata) | set(self._tags_v2))
 
     def __getitem__(self, tag):
@@ -982,8 +987,8 @@ ImageFileDirectory_v2._load_dispatch = _load_dispatch
 ImageFileDirectory_v2._write_dispatch = _write_dispatch
 for idx, name in TYPES.items():
     name = name.replace(" ", "_")
-    setattr(ImageFileDirectory_v2, "load_" + name, _load_dispatch[idx][1])
+    setattr(ImageFileDirectory_v2, f"load_{name}", _load_dispatch[idx][1])
-    setattr(ImageFileDirectory_v2, "write_" + name, _write_dispatch[idx])
+    setattr(ImageFileDirectory_v2, f"write_{name}", _write_dispatch[idx])
 del _load_dispatch, _write_dispatch, idx, name
 
 
@@ -1036,7 +1041,7 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
         ifd.next = original.next  # an indicator for multipage tiffs
         return ifd
 
-    def to_v2(self):
+    def to_v2(self) -> ImageFileDirectory_v2:
         """Returns an
         :py:class:`~PIL.TiffImagePlugin.ImageFileDirectory_v2`
         instance with the same data as is contained in the original
@@ -1056,7 +1061,7 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
     def __contains__(self, tag):
         return tag in self._tags_v1 or tag in self._tagdata
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(set(self._tagdata) | set(self._tags_v1))
 
     def __iter__(self):
@@ -1138,7 +1143,7 @@ class TiffImageFile(ImageFile.ImageFile):
             self.seek(current)
         return self._n_frames
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         """Select a given frame as current image"""
         if not self._seek_check(frame):
             return
@@ -1149,7 +1154,7 @@ class TiffImageFile(ImageFile.ImageFile):
         Image._decompression_bomb_check(self.size)
         self.im = Image.core.new(self.mode, self.size)
 
-    def _seek(self, frame):
+    def _seek(self, frame: int) -> None:
         self.fp = self._fp
 
         # reset buffered io handle in case fp
@@ -1193,7 +1198,7 @@ class TiffImageFile(ImageFile.ImageFile):
         self.__frame = frame
         self._setup()
 
-    def tell(self):
+    def tell(self) -> int:
         """Return the current frame number"""
         return self.__frame
 
@@ -1232,7 +1237,7 @@ class TiffImageFile(ImageFile.ImageFile):
             return self._load_libtiff()
         return super().load()
 
-    def load_end(self):
+    def load_end(self) -> None:
         # allow closing if we're on the first frame, there's no next
         # This is the ImageFile.load path only, libtiff specific below.
         if not self.is_animated:
@@ -1937,7 +1942,7 @@ class AppendingTiffWriter:
         self.beginning = self.f.tell()
         self.setup()
 
-    def setup(self):
+    def setup(self) -> None:
         # Reset everything.
         self.f.seek(self.beginning, os.SEEK_SET)
 
@@ -1962,7 +1967,7 @@ class AppendingTiffWriter:
         self.skipIFDs()
         self.goToEnd()
 
-    def finalize(self):
+    def finalize(self) -> None:
         if self.isFirst:
             return
 
@@ -1985,7 +1990,7 @@ class AppendingTiffWriter:
         self.f.seek(ifd_offset)
         self.fixIFD()
 
-    def newFrame(self):
+    def newFrame(self) -> None:
         # Call this to finish a frame.
         self.finalize()
         self.setup()
@@ -1998,7 +2003,7 @@ class AppendingTiffWriter:
             self.close()
         return False
 
-    def tell(self):
+    def tell(self) -> int:
         return self.f.tell() - self.offsetOfNewPage
 
     def seek(self, offset, whence=io.SEEK_SET):
@@ -2008,7 +2013,7 @@ class AppendingTiffWriter:
         self.f.seek(offset, whence)
         return self.tell()
 
-    def goToEnd(self):
+    def goToEnd(self) -> None:
         self.f.seek(0, os.SEEK_END)
         pos = self.f.tell()
 
@@ -2020,11 +2025,11 @@ class AppendingTiffWriter:
 
     def setEndian(self, endian):
         self.endian = endian
-        self.longFmt = self.endian + "L"
+        self.longFmt = f"{self.endian}L"
-        self.shortFmt = self.endian + "H"
+        self.shortFmt = f"{self.endian}H"
-        self.tagFormat = self.endian + "HHL"
+        self.tagFormat = f"{self.endian}HHL"
 
-    def skipIFDs(self):
+    def skipIFDs(self) -> None:
         while True:
             ifd_offset = self.readLong()
             if ifd_offset == 0:
@@ -2079,11 +2084,11 @@ class AppendingTiffWriter:
             msg = f"wrote only {bytes_written} bytes but wanted 4"
             raise RuntimeError(msg)
 
-    def close(self):
+    def close(self) -> None:
         self.finalize()
         self.f.close()
 
-    def fixIFD(self):
+    def fixIFD(self) -> None:
         num_tags = self.readShort()
 
         for i in range(num_tags):

src/PIL/WalImageFile.py

@@ -32,7 +32,7 @@ class WalImageFile(ImageFile.ImageFile):
     format = "WAL"
     format_description = "Quake2 Texture"
 
-    def _open(self):
+    def _open(self) -> None:
         self._mode = "P"
 
         # read header fields

src/PIL/WebPImagePlugin.py

@@ -43,7 +43,7 @@ class WebPImageFile(ImageFile.ImageFile):
     __loaded = 0
     __logical_frame = 0
 
-    def _open(self):
+    def _open(self) -> None:
         if not _webp.HAVE_WEBPANIM:
             # Legacy mode
             data, width, height, self._mode, icc_profile, exif = _webp.WebPDecode(
@@ -109,7 +109,7 @@ class WebPImageFile(ImageFile.ImageFile):
         """
         return self._getxmp(self.info["xmp"]) if "xmp" in self.info else {}
 
-    def seek(self, frame):
+    def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
 
@@ -144,7 +144,7 @@ class WebPImageFile(ImageFile.ImageFile):
         timestamp -= duration
         return data, timestamp, duration
 
-    def _seek(self, frame):
+    def _seek(self, frame: int) -> None:
         if self.__physical_frame == frame:
             return  # Nothing to do
         if frame < self.__physical_frame:
@@ -171,10 +171,10 @@ class WebPImageFile(ImageFile.ImageFile):
 
         return super().load()
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         pass
 
-    def tell(self):
+    def tell(self) -> int:
         if not _webp.HAVE_WEBPANIM:
             return super().tell()
 

src/PIL/WmfImagePlugin.py

@@ -79,7 +79,7 @@ class WmfStubImageFile(ImageFile.StubImageFile):
     format = "WMF"
     format_description = "Windows Metafile"
 
-    def _open(self):
+    def _open(self) -> None:
         self._inch = None
 
         # check placable header

src/PIL/XpmImagePlugin.py

@@ -36,7 +36,7 @@ class XpmImageFile(ImageFile.ImageFile):
     format = "XPM"
     format_description = "X11 Pixel Map"
 
-    def _open(self):
+    def _open(self) -> None:
         if not _accept(self.fp.read(9)):
             msg = "not an XPM file"
             raise SyntaxError(msg)
@@ -103,16 +103,13 @@ class XpmImageFile(ImageFile.ImageFile):
 
         self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), ("P", 0, 1))]
 
-    def load_read(self, read_bytes):
+    def load_read(self, read_bytes: int) -> bytes:
         #
         # load all image data in one chunk
 
         xsize, ysize = self.size
 
-        s = [None] * ysize
+        s = [self.fp.readline()[1 : xsize + 1].ljust(xsize) for i in range(ysize)]
-
-        for i in range(ysize):
-            s[i] = self.fp.readline()[1 : xsize + 1].ljust(xsize)
 
         return b"".join(s)
 

src/PIL/features.py

@@ -18,7 +18,7 @@ modules = {
 }
 
 
-def check_module(feature):
+def check_module(feature: str) -> bool:
     """
     Checks if a module is available.
 
@@ -42,7 +42,7 @@ def check_module(feature):
         return False
 
 
-def version_module(feature):
+def version_module(feature: str) -> str | None:
     """
     :param feature: The module to check for.
     :returns:
@@ -54,13 +54,10 @@ def version_module(feature):
 
     module, ver = modules[feature]
 
-    if ver is None:
-        return None
-
     return getattr(__import__(module, fromlist=[ver]), ver)
 
 
-def get_supported_modules():
+def get_supported_modules() -> list[str]:
     """
     :returns: A list of all supported modules.
     """
@@ -75,7 +72,7 @@ codecs = {
 }
 
 
-def check_codec(feature):
+def check_codec(feature: str) -> bool:
     """
     Checks if a codec is available.
 
@@ -89,10 +86,10 @@ def check_codec(feature):
 
     codec, lib = codecs[feature]
 
-    return codec + "_encoder" in dir(Image.core)
+    return f"{codec}_encoder" in dir(Image.core)
 
 
-def version_codec(feature):
+def version_codec(feature: str) -> str | None:
     """
     :param feature: The codec to check for.
     :returns:
@@ -105,7 +102,7 @@ def version_codec(feature):
 
     codec, lib = codecs[feature]
 
-    version = getattr(Image.core, lib + "_version")
+    version = getattr(Image.core, f"{lib}_version")
 
     if feature == "libtiff":
         return version.split("\n")[0].split("Version ")[1]
@@ -113,7 +110,7 @@ def version_codec(feature):
     return version
 
 
-def get_supported_codecs():
+def get_supported_codecs() -> list[str]:
     """
     :returns: A list of all supported codecs.
     """
@@ -133,7 +130,7 @@ features = {
 }
 
 
-def check_feature(feature):
+def check_feature(feature: str) -> bool | None:
     """
     Checks if a feature is available.
 
@@ -157,7 +154,7 @@ def check_feature(feature):
         return None
 
 
-def version_feature(feature):
+def version_feature(feature: str) -> str | None:
     """
     :param feature: The feature to check for.
     :returns: The version number as a string, or ``None`` if not available.
@@ -174,14 +171,14 @@ def version_feature(feature):
     return getattr(__import__(module, fromlist=[ver]), ver)
 
 
-def get_supported_features():
+def get_supported_features() -> list[str]:
     """
     :returns: A list of all supported features.
     """
     return [f for f in features if check_feature(f)]
 
 
-def check(feature):
+def check(feature: str) -> bool | None:
     """
     :param feature: A module, codec, or feature name.
     :returns:
@@ -199,7 +196,7 @@ def check(feature):
     return False
 
 
-def version(feature):
+def version(feature: str) -> str | None:
     """
     :param feature:
         The module, codec, or feature to check for.
@@ -215,7 +212,7 @@ def version(feature):
     return None
 
 
-def get_supported():
+def get_supported() -> list[str]:
     """
     :returns: A list of all supported modules, features, and codecs.
     """

src/_imaging.c

@@ -3737,7 +3737,7 @@ _getattr_unsafe_ptrs(ImagingObject *self, void *closure) {
         self->image->image32,
         "image",
         self->image->image);
-};
+}
 
 static struct PyGetSetDef getsetters[] = {
     {"mode", (getter)_getattr_mode},

src/_imagingcms.c

@@ -213,35 +213,38 @@ cms_transform_dealloc(CmsTransformObject *self) {
 
 static cmsUInt32Number
 findLCMStype(char *PILmode) {
-    if (strcmp(PILmode, "RGB") == 0) {
+    if (
+        strcmp(PILmode, "RGB") == 0 ||
+        strcmp(PILmode, "RGBA") == 0 ||
+        strcmp(PILmode, "RGBX") == 0
+    ) {
         return TYPE_RGBA_8;
-    } else if (strcmp(PILmode, "RGBA") == 0) {
+    }
-        return TYPE_RGBA_8;
+    if (strcmp(PILmode, "RGBA;16B") == 0) {
-    } else if (strcmp(PILmode, "RGBX") == 0) {
-        return TYPE_RGBA_8;
-    } else if (strcmp(PILmode, "RGBA;16B") == 0) {
         return TYPE_RGBA_16;
-    } else if (strcmp(PILmode, "CMYK") == 0) {
+    }
+    if (strcmp(PILmode, "CMYK") == 0) {
         return TYPE_CMYK_8;
-    } else if (strcmp(PILmode, "L") == 0) {
+    }
-        return TYPE_GRAY_8;
+    if (strcmp(PILmode, "L;16") == 0) {
-    } else if (strcmp(PILmode, "L;16") == 0) {
         return TYPE_GRAY_16;
-    } else if (strcmp(PILmode, "L;16B") == 0) {
+    }
+    if (strcmp(PILmode, "L;16B") == 0) {
         return TYPE_GRAY_16_SE;
-    } else if (strcmp(PILmode, "YCCA") == 0) {
+    }
+    if (
+        strcmp(PILmode, "YCCA") == 0 ||
+        strcmp(PILmode, "YCC") == 0
+    ) {
         return TYPE_YCbCr_8;
-    } else if (strcmp(PILmode, "YCC") == 0) {
+    }
-        return TYPE_YCbCr_8;
+    if (strcmp(PILmode, "LAB") == 0) {
-    } else if (strcmp(PILmode, "LAB") == 0) {
         // LabX equivalent like ALab, but not reversed -- no #define in lcms2
         return (COLORSPACE_SH(PT_LabV2) | CHANNELS_SH(3) | BYTES_SH(1) | EXTRA_SH(1));
     }
-    else {
+    /* presume "L" by default */
-        /* take a wild guess... */
     return TYPE_GRAY_8;
 }
-}
 
 #define Cms_Min(a, b) ((a) < (b) ? (a) : (b))
 

src/display.c

@@ -427,7 +427,6 @@ error:
 
 PyObject *
 PyImaging_GrabClipboardWin32(PyObject *self, PyObject *args) {
-    int clip;
     HANDLE handle = NULL;
     int size;
     void *data;

src/libImaging/Access.c

@@ -81,12 +81,6 @@ get_pixel_16B(Imaging im, int x, int y, void *color) {
 #endif
 }
 
-static void
-get_pixel_16(Imaging im, int x, int y, void *color) {
-    UINT8 *in = (UINT8 *)&im->image[y][x + x];
-    memcpy(color, in, sizeof(UINT16));
-}
-
 static void
 get_pixel_BGR15(Imaging im, int x, int y, void *color) {
     UINT8 *in = (UINT8 *)&im->image8[y][x * 2];
@@ -207,7 +201,11 @@ ImagingAccessInit() {
     ADD("I;16", get_pixel_16L, put_pixel_16L);
     ADD("I;16L", get_pixel_16L, put_pixel_16L);
     ADD("I;16B", get_pixel_16B, put_pixel_16B);
-    ADD("I;16N", get_pixel_16, put_pixel_16L);
+#ifdef WORDS_BIGENDIAN
+    ADD("I;16N", get_pixel_16B, put_pixel_16B);
+#else
+    ADD("I;16N", get_pixel_16L, put_pixel_16L);
+#endif
     ADD("I;32L", get_pixel_32L, put_pixel_32L);
     ADD("I;32B", get_pixel_32B, put_pixel_32B);
     ADD("F", get_pixel_32, put_pixel_32);

src/libImaging/Convert.c

@@ -254,9 +254,8 @@ static void
 rgb2i16l(UINT8 *out_, const UINT8 *in, int xsize) {
     int x;
     for (x = 0; x < xsize; x++, in += 4) {
-        UINT8 v = CLIP16(L24(in) >> 16);
+        *out_++ = L24(in) >> 16;
-        *out_++ = v;
+        *out_++ = 0;
-        *out_++ = v >> 8;
     }
 }
 
@@ -264,9 +263,8 @@ static void
 rgb2i16b(UINT8 *out_, const UINT8 *in, int xsize) {
     int x;
     for (x = 0; x < xsize; x++, in += 4) {
-        UINT8 v = CLIP16(L24(in) >> 16);
+        *out_++ = 0;
-        *out_++ = v >> 8;
+        *out_++ = L24(in) >> 16;
-        *out_++ = v;
     }
 }
 

src/libImaging/Matrix.c

@@ -24,11 +24,11 @@ ImagingConvertMatrix(Imaging im, const char *mode, float m[]) {
     ImagingSectionCookie cookie;
 
     /* Assume there's enough data in the buffer */
-    if (!im) {
+    if (!im || im->bands != 3) {
         return (Imaging)ImagingError_ModeError();
     }
 
-    if (strcmp(mode, "L") == 0 && im->bands == 3) {
+    if (strcmp(mode, "L") == 0) {
         imOut = ImagingNewDirty("L", im->xsize, im->ysize);
         if (!imOut) {
             return NULL;
@@ -47,7 +47,7 @@ ImagingConvertMatrix(Imaging im, const char *mode, float m[]) {
         }
         ImagingSectionLeave(&cookie);
 
-    } else if (strlen(mode) == 3 && im->bands == 3) {
+    } else if (strlen(mode) == 3) {
         imOut = ImagingNewDirty(mode, im->xsize, im->ysize);
         if (!imOut) {
             return NULL;

src/libImaging/Unpack.c

@@ -1582,6 +1582,7 @@ static struct {
     {"P", "P", 8, copy1},
     {"P", "P;R", 8, unpackLR},
     {"P", "L", 8, copy1},
+    {"P", "PX", 16, unpackL16B},
 
     /* palette w. alpha */
     {"PA", "PA", 16, unpackLA},