diff --git a/.ci/requirements-mypy.txt b/.ci/requirements-mypy.txt
index 23792281b..47fc64399 100644
--- a/.ci/requirements-mypy.txt
+++ b/.ci/requirements-mypy.txt
@@ -5,6 +5,7 @@ ipython
 numpy
 packaging
 pytest
+sphinx
 types-defusedxml
 types-olefile
 types-setuptools
diff --git a/Tests/test_imagefile.py b/Tests/test_imagefile.py
index fe7d44785..95e91db83 100644
--- a/Tests/test_imagefile.py
+++ b/Tests/test_imagefile.py
@@ -317,7 +317,13 @@ class TestPyEncoder(CodecsTest):
 
         fp = BytesIO()
         ImageFile._save(
-            im, fp, [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize), 0, "RGB")]
+            im,
+            fp,
+            [
+                ImageFile._Tile(
+                    "MOCK", (xoff, yoff, xoff + xsize, yoff + ysize), 0, "RGB"
+                )
+            ],
         )
 
         assert MockPyEncoder.last
@@ -333,7 +339,7 @@ class TestPyEncoder(CodecsTest):
         im.tile = [("MOCK", None, 32, None)]
 
         fp = BytesIO()
-        ImageFile._save(im, fp, [("MOCK", None, 0, "RGB")])
+        ImageFile._save(im, fp, [ImageFile._Tile("MOCK", None, 0, "RGB")])
 
         assert MockPyEncoder.last
         assert MockPyEncoder.last.state.xoff == 0
@@ -350,7 +356,9 @@ class TestPyEncoder(CodecsTest):
         MockPyEncoder.last = None
         with pytest.raises(ValueError):
             ImageFile._save(
-                im, fp, [("MOCK", (xoff, yoff, -10, yoff + ysize), 0, "RGB")]
+                im,
+                fp,
+                [ImageFile._Tile("MOCK", (xoff, yoff, -10, yoff + ysize), 0, "RGB")],
             )
         last: MockPyEncoder | None = MockPyEncoder.last
         assert last
@@ -358,7 +366,9 @@ class TestPyEncoder(CodecsTest):
 
         with pytest.raises(ValueError):
             ImageFile._save(
-                im, fp, [("MOCK", (xoff, yoff, xoff + xsize, -10), 0, "RGB")]
+                im,
+                fp,
+                [ImageFile._Tile("MOCK", (xoff, yoff, xoff + xsize, -10), 0, "RGB")],
             )
 
     def test_oversize(self) -> None:
@@ -371,14 +381,22 @@ class TestPyEncoder(CodecsTest):
             ImageFile._save(
                 im,
                 fp,
-                [("MOCK", (xoff, yoff, xoff + xsize + 100, yoff + ysize), 0, "RGB")],
+                [
+                    ImageFile._Tile(
+                        "MOCK", (xoff, yoff, xoff + xsize + 100, yoff + ysize), 0, "RGB"
+                    )
+                ],
             )
 
         with pytest.raises(ValueError):
             ImageFile._save(
                 im,
                 fp,
-                [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize + 100), 0, "RGB")],
+                [
+                    ImageFile._Tile(
+                        "MOCK", (xoff, yoff, xoff + xsize, yoff + ysize + 100), 0, "RGB"
+                    )
+                ],
             )
 
     def test_encode(self) -> None:
diff --git a/docs/example/DdsImagePlugin.py b/docs/example/DdsImagePlugin.py
index 2a2a0ba29..caa852b1f 100644
--- a/docs/example/DdsImagePlugin.py
+++ b/docs/example/DdsImagePlugin.py
@@ -14,6 +14,7 @@ from __future__ import annotations
 
 import struct
 from io import BytesIO
+from typing import IO
 
 from PIL import Image, ImageFile
 
@@ -94,26 +95,26 @@ DXT3_FOURCC = 0x33545844
 DXT5_FOURCC = 0x35545844
 
 
-def _decode565(bits):
+def _decode565(bits: int) -> tuple[int, int, int]:
     a = ((bits >> 11) & 0x1F) << 3
     b = ((bits >> 5) & 0x3F) << 2
     c = (bits & 0x1F) << 3
     return a, b, c
 
 
-def _c2a(a, b):
+def _c2a(a: int, b: int) -> int:
     return (2 * a + b) // 3
 
 
-def _c2b(a, b):
+def _c2b(a: int, b: int) -> int:
     return (a + b) // 2
 
 
-def _c3(a, b):
+def _c3(a: int, b: int) -> int:
     return (2 * b + a) // 3
 
 
-def _dxt1(data, width, height):
+def _dxt1(data: IO[bytes], width: int, height: int) -> bytes:
     # TODO implement this function as pixel format in decode.c
     ret = bytearray(4 * width * height)
 
@@ -151,7 +152,7 @@ def _dxt1(data, width, height):
     return bytes(ret)
 
 
-def _dxtc_alpha(a0, a1, ac0, ac1, ai):
+def _dxtc_alpha(a0: int, a1: int, ac0: int, ac1: int, ai: int) -> int:
     if ai <= 12:
         ac = (ac0 >> ai) & 7
     elif ai == 15:
@@ -175,7 +176,7 @@ def _dxtc_alpha(a0, a1, ac0, ac1, ai):
     return alpha
 
 
-def _dxt5(data, width, height):
+def _dxt5(data: IO[bytes], width: int, height: int) -> bytes:
     # TODO implement this function as pixel format in decode.c
     ret = bytearray(4 * width * height)
 
@@ -211,7 +212,7 @@ 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)
@@ -242,19 +243,20 @@ class DdsImageFile(ImageFile.ImageFile):
         elif fourcc == b"DXT5":
             self.decoder = "DXT5"
         else:
-            msg = f"Unimplemented pixel format {fourcc}"
+            msg = f"Unimplemented pixel format {repr(fourcc)}"
             raise NotImplementedError(msg)
 
         self.tile = [(self.decoder, (0, 0) + self.size, 0, (self.mode, 0, 1))]
 
-    def load_seek(self, pos):
+    def load_seek(self, pos: int) -> None:
         pass
 
 
 class DXT1Decoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
+        assert self.fd is not None
         try:
             self.set_as_raw(_dxt1(self.fd, self.state.xsize, self.state.ysize))
         except struct.error as e:
@@ -266,7 +268,8 @@ class DXT1Decoder(ImageFile.PyDecoder):
 class DXT5Decoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer):
+    def decode(self, buffer: bytes) -> tuple[int, int]:
+        assert self.fd is not None
         try:
             self.set_as_raw(_dxt5(self.fd, self.state.xsize, self.state.ysize))
         except struct.error as e:
@@ -279,7 +282,7 @@ Image.register_decoder("DXT1", DXT1Decoder)
 Image.register_decoder("DXT5", DXT5Decoder)
 
 
-def _accept(prefix):
+def _accept(prefix: bytes) -> bool:
     return prefix[:4] == b"DDS "
 
 
diff --git a/docs/handbook/image-file-formats.rst b/docs/handbook/image-file-formats.rst
index 861e09a43..ca0e05eb6 100644
--- a/docs/handbook/image-file-formats.rst
+++ b/docs/handbook/image-file-formats.rst
@@ -1517,19 +1517,21 @@ To add other read or write support, use
 :py:func:`PIL.WmfImagePlugin.register_handler` to register a WMF and EMF
 handler. ::
 
-    from PIL import Image
+    from typing import IO
+
+    from PIL import Image, ImageFile
     from PIL import WmfImagePlugin
 
 
-    class WmfHandler:
-        def open(self, im):
+    class WmfHandler(ImageFile.StubHandler):
+        def open(self, im: ImageFile.StubImageFile) -> None:
             ...
 
-        def load(self, im):
+        def load(self, im: ImageFile.StubImageFile) -> Image.Image:
             ...
             return image
 
-        def save(self, im, fp, filename):
+        def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
             ...
 
 
diff --git a/docs/handbook/tutorial.rst b/docs/handbook/tutorial.rst
index c36011362..3df8e0d20 100644
--- a/docs/handbook/tutorial.rst
+++ b/docs/handbook/tutorial.rst
@@ -186,7 +186,7 @@ Rolling an image
 
 ::
 
-    def roll(im, delta):
+    def roll(im: Image.Image, delta: int) -> Image.Image:
         """Roll an image sideways."""
         xsize, ysize = im.size
 
@@ -211,7 +211,7 @@ Merging images
 
 ::
 
-    def merge(im1, im2):
+    def merge(im1: Image.Image, im2: Image.Image) -> Image.Image:
         w = im1.size[0] + im2.size[0]
         h = max(im1.size[1], im2.size[1])
         im = Image.new("RGBA", (w, h))
@@ -704,7 +704,7 @@ in the current directory can be saved as JPEGs at reduced quality.
     import glob
     from PIL import Image
 
-    def compress_image(source_path, dest_path):
+    def compress_image(source_path: str, dest_path: str) -> None:
         with Image.open(source_path) as img:
             if img.mode != "RGB":
                 img = img.convert("RGB")
diff --git a/docs/handbook/writing-your-own-image-plugin.rst b/docs/handbook/writing-your-own-image-plugin.rst
index 956d63aa7..2e853224d 100644
--- a/docs/handbook/writing-your-own-image-plugin.rst
+++ b/docs/handbook/writing-your-own-image-plugin.rst
@@ -53,7 +53,7 @@ true color.
     from PIL import Image, ImageFile
 
 
-    def _accept(prefix):
+    def _accept(prefix: bytes) -> bool:
         return prefix[:4] == b"SPAM"
 
 
@@ -62,7 +62,7 @@ true color.
         format = "SPAM"
         format_description = "Spam raster image"
 
-        def _open(self):
+        def _open(self) -> None:
 
             header = self.fp.read(128).split()
 
@@ -82,7 +82,7 @@ true color.
                 raise SyntaxError(msg)
 
             # data descriptor
-            self.tile = [("raw", (0, 0) + self.size, 128, (self.mode, 0, 1))]
+            self.tile = [ImageFile._Tile("raw", (0, 0) + self.size, 128, (self.mode, 0, 1))]
 
 
     Image.register_open(SpamImageFile.format, SpamImageFile, _accept)
diff --git a/src/PIL/BlpImagePlugin.py b/src/PIL/BlpImagePlugin.py
index 6d71049a9..569f2c9bf 100644
--- a/src/PIL/BlpImagePlugin.py
+++ b/src/PIL/BlpImagePlugin.py
@@ -477,7 +477,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         fp.write(struct.pack("<i", 5))
         fp.write(struct.pack("<i", 0))
 
-    ImageFile._save(im, fp, [("BLP", (0, 0) + im.size, 0, im.mode)])
+    ImageFile._save(im, fp, [ImageFile._Tile("BLP", (0, 0) + im.size, 0, im.mode)])
 
 
 Image.register_open(BlpImageFile.format, BlpImageFile, _accept)
diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index 48bdd9830..129415955 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -482,7 +482,9 @@ def _save(
     if palette:
         fp.write(palette)
 
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, stride, -1))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, stride, -1))]
+    )
 
 
 #
diff --git a/src/PIL/EpsImagePlugin.py b/src/PIL/EpsImagePlugin.py
index 35915e652..4da0cd230 100644
--- a/src/PIL/EpsImagePlugin.py
+++ b/src/PIL/EpsImagePlugin.py
@@ -434,7 +434,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes, eps: int = 1) -
     if hasattr(fp, "flush"):
         fp.flush()
 
-    ImageFile._save(im, fp, [("eps", (0, 0) + im.size, 0, None)])
+    ImageFile._save(im, fp, [ImageFile._Tile("eps", (0, 0) + im.size, 0, None)])
 
     fp.write(b"\n%%%%EndBinary\n")
     fp.write(b"grestore end\n")
diff --git a/src/PIL/GifImagePlugin.py b/src/PIL/GifImagePlugin.py
index bf74f9356..45d513289 100644
--- a/src/PIL/GifImagePlugin.py
+++ b/src/PIL/GifImagePlugin.py
@@ -591,7 +591,9 @@ def _write_single_frame(
     _write_local_header(fp, im, (0, 0), flags)
 
     im_out.encoderconfig = (8, get_interlace(im))
-    ImageFile._save(im_out, fp, [("gif", (0, 0) + im.size, 0, RAWMODE[im_out.mode])])
+    ImageFile._save(
+        im_out, fp, [ImageFile._Tile("gif", (0, 0) + im.size, 0, RAWMODE[im_out.mode])]
+    )
 
     fp.write(b"\0")  # end of image data
 
@@ -1054,7 +1056,9 @@ def _write_frame_data(
         _write_local_header(fp, im_frame, offset, 0)
 
         ImageFile._save(
-            im_frame, fp, [("gif", (0, 0) + im_frame.size, 0, RAWMODE[im_frame.mode])]
+            im_frame,
+            fp,
+            [ImageFile._Tile("gif", (0, 0) + im_frame.size, 0, RAWMODE[im_frame.mode])],
         )
 
         fp.write(b"\0")  # end of image data
diff --git a/src/PIL/IcoImagePlugin.py b/src/PIL/IcoImagePlugin.py
index c891024f5..3bf5d9c04 100644
--- a/src/PIL/IcoImagePlugin.py
+++ b/src/PIL/IcoImagePlugin.py
@@ -97,7 +97,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
             if bits != 32:
                 and_mask = Image.new("1", size)
                 ImageFile._save(
-                    and_mask, image_io, [("raw", (0, 0) + size, 0, ("1", 0, -1))]
+                    and_mask,
+                    image_io,
+                    [ImageFile._Tile("raw", (0, 0) + size, 0, ("1", 0, -1))],
                 )
         else:
             frame.save(image_io, "png")
diff --git a/src/PIL/ImImagePlugin.py b/src/PIL/ImImagePlugin.py
index 2fb7ecd52..b94165089 100644
--- a/src/PIL/ImImagePlugin.py
+++ b/src/PIL/ImImagePlugin.py
@@ -360,7 +360,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
             palette += im_palette[colors * i : colors * (i + 1)]
             palette += b"\x00" * (256 - colors)
         fp.write(palette)  # 768 bytes
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, -1))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, 0, -1))]
+    )
 
 
 #
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index ebf4f46c4..a6eefff56 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -218,9 +218,10 @@ if hasattr(core, "DEFAULT_STRATEGY"):
 # Registries
 
 if TYPE_CHECKING:
+    import mmap
     from xml.etree.ElementTree import Element
 
-    from . import ImageFile, ImagePalette, TiffImagePlugin
+    from . import ImageFile, ImageFilter, ImagePalette, TiffImagePlugin
     from ._typing import NumpyArray, StrOrBytesPath, TypeGuard
 ID: list[str] = []
 OPEN: dict[
@@ -612,7 +613,7 @@ class Image:
                 logger.debug("Error closing: %s", msg)
 
         if getattr(self, "map", None):
-            self.map = None
+            self.map: mmap.mmap | None = None
 
         # Instead of simply setting to None, we're setting up a
         # deferred error that will better explain that the core image
@@ -1336,9 +1337,6 @@ class Image:
         self.load()
         return self._new(self.im.expand(xmargin, ymargin))
 
-    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
diff --git a/src/PIL/ImageFile.py b/src/PIL/ImageFile.py
index 2a8846c1a..73554fa53 100644
--- a/src/PIL/ImageFile.py
+++ b/src/PIL/ImageFile.py
@@ -93,7 +93,7 @@ def _tilesort(t: _Tile) -> int:
 
 class _Tile(NamedTuple):
     codec_name: str
-    extents: tuple[int, int, int, int]
+    extents: tuple[int, int, int, int] | None
     offset: int
     args: tuple[Any, ...] | str | None
 
@@ -174,7 +174,7 @@ class ImageFile(Image.Image):
             self.fp.close()
         self.fp = None
 
-    def load(self):
+    def load(self) -> Image.core.PixelAccess | None:
         """Load image data based on tile list"""
 
         if self.tile is None:
@@ -185,7 +185,7 @@ class ImageFile(Image.Image):
         if not self.tile:
             return pixel
 
-        self.map = None
+        self.map: mmap.mmap | None = None
         use_mmap = self.filename and len(self.tile) == 1
         # As of pypy 2.1.0, memory mapping was failing here.
         use_mmap = use_mmap and not hasattr(sys, "pypy_version_info")
@@ -193,17 +193,17 @@ class ImageFile(Image.Image):
         readonly = 0
 
         # look for read/seek overrides
-        try:
+        if hasattr(self, "load_read"):
             read = self.load_read
             # don't use mmap if there are custom read/seek functions
             use_mmap = False
-        except AttributeError:
+        else:
             read = self.fp.read
 
-        try:
+        if hasattr(self, "load_seek"):
             seek = self.load_seek
             use_mmap = False
-        except AttributeError:
+        else:
             seek = self.fp.seek
 
         if use_mmap:
@@ -243,11 +243,8 @@ class ImageFile(Image.Image):
             # sort tiles in file order
             self.tile.sort(key=_tilesort)
 
-            try:
-                # FIXME: This is a hack to handle TIFF's JpegTables tag.
-                prefix = self.tile_prefix
-            except AttributeError:
-                prefix = b""
+            # FIXME: This is a hack to handle TIFF's JpegTables tag.
+            prefix = getattr(self, "tile_prefix", b"")
 
             # Remove consecutive duplicates that only differ by their offset
             self.tile = [
@@ -525,7 +522,7 @@ class Parser:
 # --------------------------------------------------------------------
 
 
-def _save(im: Image.Image, fp: IO[bytes], tile, bufsize: int = 0) -> None:
+def _save(im: Image.Image, fp: IO[bytes], tile: list[_Tile], bufsize: int = 0) -> None:
     """Helper to save image based on tile list
 
     :param im: Image object.
diff --git a/src/PIL/Jpeg2KImagePlugin.py b/src/PIL/Jpeg2KImagePlugin.py
index ef9107f00..02c2e48cf 100644
--- a/src/PIL/Jpeg2KImagePlugin.py
+++ b/src/PIL/Jpeg2KImagePlugin.py
@@ -419,7 +419,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         plt,
     )
 
-    ImageFile._save(im, fp, [("jpeg2k", (0, 0) + im.size, 0, kind)])
+    ImageFile._save(im, fp, [ImageFile._Tile("jpeg2k", (0, 0) + im.size, 0, kind)])
 
 
 # ------------------------------------------------------------
diff --git a/src/PIL/JpegImagePlugin.py b/src/PIL/JpegImagePlugin.py
index fc897e2b9..bd4539be4 100644
--- a/src/PIL/JpegImagePlugin.py
+++ b/src/PIL/JpegImagePlugin.py
@@ -826,7 +826,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         # Ensure that our buffer is big enough. Same with the icc_profile block.
         bufsize = max(bufsize, len(exif) + 5, len(extra) + 1)
 
-    ImageFile._save(im, fp, [("jpeg", (0, 0) + im.size, 0, rawmode)], bufsize)
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("jpeg", (0, 0) + im.size, 0, rawmode)], bufsize
+    )
 
 
 def _save_cjpeg(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
diff --git a/src/PIL/MspImagePlugin.py b/src/PIL/MspImagePlugin.py
index 0a75c868b..40e5fa435 100644
--- a/src/PIL/MspImagePlugin.py
+++ b/src/PIL/MspImagePlugin.py
@@ -188,7 +188,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         fp.write(o16(h))
 
     # image body
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 32, ("1", 0, 1))])
+    ImageFile._save(im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 32, ("1", 0, 1))])
 
 
 #
diff --git a/src/PIL/PalmImagePlugin.py b/src/PIL/PalmImagePlugin.py
index 1735070f8..62bf5f542 100644
--- a/src/PIL/PalmImagePlugin.py
+++ b/src/PIL/PalmImagePlugin.py
@@ -213,7 +213,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
                 )
 
     # now convert data to raw form
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, rowbytes, 1))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, rowbytes, 1))]
+    )
 
     if hasattr(fp, "flush"):
         fp.flush()
diff --git a/src/PIL/PcxImagePlugin.py b/src/PIL/PcxImagePlugin.py
index dd42003b5..4fb04715b 100644
--- a/src/PIL/PcxImagePlugin.py
+++ b/src/PIL/PcxImagePlugin.py
@@ -198,7 +198,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
 
     assert fp.tell() == 128
 
-    ImageFile._save(im, fp, [("pcx", (0, 0) + im.size, 0, (rawmode, bits * planes))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("pcx", (0, 0) + im.size, 0, (rawmode, bits * planes))]
+    )
 
     if im.mode == "P":
         # colour palette
diff --git a/src/PIL/PdfImagePlugin.py b/src/PIL/PdfImagePlugin.py
index 7fc1108bb..e9c20ddc1 100644
--- a/src/PIL/PdfImagePlugin.py
+++ b/src/PIL/PdfImagePlugin.py
@@ -138,7 +138,7 @@ def _write_image(
     op = io.BytesIO()
 
     if decode_filter == "ASCIIHexDecode":
-        ImageFile._save(im, op, [("hex", (0, 0) + im.size, 0, im.mode)])
+        ImageFile._save(im, op, [ImageFile._Tile("hex", (0, 0) + im.size, 0, im.mode)])
     elif decode_filter == "CCITTFaxDecode":
         im.save(
             op,
diff --git a/src/PIL/PngImagePlugin.py b/src/PIL/PngImagePlugin.py
index 910fa9755..fc20b18a8 100644
--- a/src/PIL/PngImagePlugin.py
+++ b/src/PIL/PngImagePlugin.py
@@ -1226,7 +1226,7 @@ def _write_multiple_frames(
         ImageFile._save(
             im,
             cast(IO[bytes], _idat(fp, chunk)),
-            [("zip", (0, 0) + im.size, 0, rawmode)],
+            [ImageFile._Tile("zip", (0, 0) + im.size, 0, rawmode)],
         )
 
     seq_num = 0
@@ -1263,14 +1263,14 @@ def _write_multiple_frames(
             ImageFile._save(
                 im_frame,
                 cast(IO[bytes], _idat(fp, chunk)),
-                [("zip", (0, 0) + im_frame.size, 0, rawmode)],
+                [ImageFile._Tile("zip", (0, 0) + im_frame.size, 0, rawmode)],
             )
         else:
             fdat_chunks = _fdat(fp, chunk, seq_num)
             ImageFile._save(
                 im_frame,
                 cast(IO[bytes], fdat_chunks),
-                [("zip", (0, 0) + im_frame.size, 0, rawmode)],
+                [ImageFile._Tile("zip", (0, 0) + im_frame.size, 0, rawmode)],
             )
             seq_num = fdat_chunks.seq_num
     return None
@@ -1471,7 +1471,7 @@ def _save(
         ImageFile._save(
             single_im,
             cast(IO[bytes], _idat(fp, chunk)),
-            [("zip", (0, 0) + single_im.size, 0, rawmode)],
+            [ImageFile._Tile("zip", (0, 0) + single_im.size, 0, rawmode)],
         )
 
     if info:
diff --git a/src/PIL/PpmImagePlugin.py b/src/PIL/PpmImagePlugin.py
index 16c9ccbba..7bdaa9fe7 100644
--- a/src/PIL/PpmImagePlugin.py
+++ b/src/PIL/PpmImagePlugin.py
@@ -353,7 +353,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     elif head == b"Pf":
         fp.write(b"-1.0\n")
     row_order = -1 if im.mode == "F" else 1
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, row_order))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, 0, row_order))]
+    )
 
 
 #
diff --git a/src/PIL/SpiderImagePlugin.py b/src/PIL/SpiderImagePlugin.py
index a07101e54..7045ab566 100644
--- a/src/PIL/SpiderImagePlugin.py
+++ b/src/PIL/SpiderImagePlugin.py
@@ -278,7 +278,9 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     fp.writelines(hdr)
 
     rawmode = "F;32NF"  # 32-bit native floating point
-    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, 1))])
+    ImageFile._save(
+        im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, 0, 1))]
+    )
 
 
 def _save_spider(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
diff --git a/src/PIL/TgaImagePlugin.py b/src/PIL/TgaImagePlugin.py
index 39104aece..a43aae1ec 100644
--- a/src/PIL/TgaImagePlugin.py
+++ b/src/PIL/TgaImagePlugin.py
@@ -238,11 +238,15 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
 
     if rle:
         ImageFile._save(
-            im, fp, [("tga_rle", (0, 0) + im.size, 0, (rawmode, orientation))]
+            im,
+            fp,
+            [ImageFile._Tile("tga_rle", (0, 0) + im.size, 0, (rawmode, orientation))],
         )
     else:
         ImageFile._save(
-            im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, orientation))]
+            im,
+            fp,
+            [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, 0, orientation))],
         )
 
     # write targa version 2 footer
diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index deae199d5..2ce8a6c2a 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -456,8 +456,11 @@ class IFDRational(Rational):
         __int__ = _delegate("__int__")
 
 
-def _register_loader(idx: int, size: int):
-    def decorator(func):
+_LoaderFunc = Callable[["ImageFileDirectory_v2", bytes, bool], Any]
+
+
+def _register_loader(idx: int, size: int) -> Callable[[_LoaderFunc], _LoaderFunc]:
+    def decorator(func: _LoaderFunc) -> _LoaderFunc:
         from .TiffTags import TYPES
 
         if func.__name__.startswith("load_"):
@@ -482,12 +485,13 @@ def _register_basic(idx_fmt_name: tuple[int, str, str]) -> None:
     idx, fmt, name = idx_fmt_name
     TYPES[idx] = name
     size = struct.calcsize(f"={fmt}")
-    _load_dispatch[idx] = (  # noqa: F821
-        size,
-        lambda self, data, legacy_api=True: (
-            self._unpack(f"{len(data) // size}{fmt}", data)
-        ),
-    )
+
+    def basic_handler(
+        self: ImageFileDirectory_v2, data: bytes, legacy_api: bool = True
+    ) -> tuple[Any, ...]:
+        return self._unpack(f"{len(data) // size}{fmt}", data)
+
+    _load_dispatch[idx] = size, basic_handler  # noqa: F821
     _write_dispatch[idx] = lambda self, *values: (  # noqa: F821
         b"".join(self._pack(fmt, value) for value in values)
     )
@@ -560,7 +564,7 @@ class ImageFileDirectory_v2(_IFDv2Base):
 
     """
 
-    _load_dispatch: dict[int, Callable[[ImageFileDirectory_v2, bytes, bool], Any]] = {}
+    _load_dispatch: dict[int, tuple[int, _LoaderFunc]] = {}
     _write_dispatch: dict[int, Callable[..., Any]] = {}
 
     def __init__(
@@ -653,10 +657,10 @@ class ImageFileDirectory_v2(_IFDv2Base):
     def __contains__(self, tag: object) -> bool:
         return tag in self._tags_v2 or tag in self._tagdata
 
-    def __setitem__(self, tag: int, value) -> None:
+    def __setitem__(self, tag: int, value: Any) -> None:
         self._setitem(tag, value, self.legacy_api)
 
-    def _setitem(self, tag: int, value, legacy_api: bool) -> None:
+    def _setitem(self, tag: int, value: Any, legacy_api: bool) -> None:
         basetypes = (Number, bytes, str)
 
         info = TiffTags.lookup(tag, self.group)
@@ -744,10 +748,10 @@ class ImageFileDirectory_v2(_IFDv2Base):
     def __iter__(self) -> Iterator[int]:
         return iter(set(self._tagdata) | set(self._tags_v2))
 
-    def _unpack(self, fmt: str, data: bytes):
+    def _unpack(self, fmt: str, data: bytes) -> tuple[Any, ...]:
         return struct.unpack(self._endian + fmt, data)
 
-    def _pack(self, fmt: str, *values) -> bytes:
+    def _pack(self, fmt: str, *values: Any) -> bytes:
         return struct.pack(self._endian + fmt, *values)
 
     list(
@@ -824,7 +828,9 @@ class ImageFileDirectory_v2(_IFDv2Base):
         return value
 
     @_register_loader(10, 8)
-    def load_signed_rational(self, data: bytes, legacy_api: bool = True):
+    def load_signed_rational(
+        self, data: bytes, legacy_api: bool = True
+    ) -> tuple[tuple[int, int] | IFDRational, ...]:
         vals = self._unpack(f"{len(data) // 4}l", data)
 
         def combine(a: int, b: int) -> tuple[int, int] | IFDRational:
@@ -1088,7 +1094,7 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
     def __iter__(self) -> Iterator[int]:
         return iter(set(self._tagdata) | set(self._tags_v1))
 
-    def __setitem__(self, tag: int, value) -> None:
+    def __setitem__(self, tag: int, value: Any) -> None:
         for legacy_api in (False, True):
             self._setitem(tag, value, legacy_api)
 
diff --git a/src/PIL/XbmImagePlugin.py b/src/PIL/XbmImagePlugin.py
index 6d11bbfcf..6c2e32804 100644
--- a/src/PIL/XbmImagePlugin.py
+++ b/src/PIL/XbmImagePlugin.py
@@ -85,7 +85,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
 
     fp.write(b"static char im_bits[] = {\n")
 
-    ImageFile._save(im, fp, [("xbm", (0, 0) + im.size, 0, None)])
+    ImageFile._save(im, fp, [ImageFile._Tile("xbm", (0, 0) + im.size, 0, None)])
 
     fp.write(b"};\n")
 
diff --git a/tox.ini b/tox.ini
index 4b4059455..70b8bf145 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,4 +36,4 @@ deps =
 extras =
     typing
 commands =
-    mypy src Tests {posargs}
+    mypy docs src winbuild Tests {posargs}
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index 7129699eb..1021e4f22 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -7,6 +7,7 @@ import re
 import shutil
 import struct
 import subprocess
+from typing import Any
 
 
 def cmd_cd(path: str) -> str:
@@ -43,21 +44,19 @@ def cmd_nmake(
     target: str = "",
     params: list[str] | None = None,
 ) -> str:
-    params = "" if params is None else " ".join(params)
-
     return " ".join(
         [
             "{nmake}",
             "-nologo",
             f'-f "{makefile}"' if makefile is not None else "",
-            f"{params}",
+            f'{" ".join(params)}' if params is not None else "",
             f'"{target}"',
         ]
     )
 
 
 def cmds_cmake(
-    target: str | tuple[str, ...] | list[str], *params, build_dir: str = "."
+    target: str | tuple[str, ...] | list[str], *params: str, build_dir: str = "."
 ) -> list[str]:
     if not isinstance(target, str):
         target = " ".join(target)
@@ -129,7 +128,7 @@ V["ZLIB_DOTLESS"] = V["ZLIB"].replace(".", "")
 
 
 # dependencies, listed in order of compilation
-DEPS = {
+DEPS: dict[str, dict[str, Any]] = {
     "libjpeg": {
         "url": f"{SF_PROJECTS}/libjpeg-turbo/files/{V['JPEGTURBO']}/"
         f"libjpeg-turbo-{V['JPEGTURBO']}.tar.gz/download",
@@ -538,7 +537,7 @@ def write_script(
             print("    " + line)
 
 
-def get_footer(dep: dict) -> list[str]:
+def get_footer(dep: dict[str, Any]) -> list[str]:
     lines = []
     for out in dep.get("headers", []):
         lines.append(cmd_copy(out, "{inc_dir}"))
@@ -583,6 +582,7 @@ def build_dep(name: str, prefs: dict[str, str], verbose: bool) -> str:
             license_text += f.read()
     if "license_pattern" in dep:
         match = re.search(dep["license_pattern"], license_text, re.DOTALL)
+        assert match is not None
         license_text = "\n".join(match.groups())
     assert len(license_text) > 50
     with open(os.path.join(license_dir, f"{directory}.txt"), "w") as f: