Merge branch 'main' into ImageStat_getextrema_opt

.github/workflows/wheels-dependencies.sh

@@ -22,7 +22,7 @@ JPEGTURBO_VERSION=3.0.1
 OPENJPEG_VERSION=2.5.0
 XZ_VERSION=5.4.5
 TIFF_VERSION=4.6.0
-LCMS2_VERSION=2.15
+LCMS2_VERSION=2.16
 if [[ -n "$IS_MACOS" ]]; then
     GIFLIB_VERSION=5.1.4
 else

.pre-commit-config.yaml

@@ -1,12 +1,12 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.1.4
+    rev: v0.1.6
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
 
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 23.10.1
+    rev: 23.11.0
     hooks:
       - id: black
 
@@ -42,12 +42,12 @@ repos:
         exclude: ^.github/.*TEMPLATE|^Tests/(fonts|images)/
 
   - repo: https://github.com/sphinx-contrib/sphinx-lint
-    rev: v0.8.1
+    rev: v0.9.0
     hooks:
       - id: sphinx-lint
 
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: 1.4.1
+    rev: 1.5.3
     hooks:
       - id: pyproject-fmt
 

CHANGES.rst

@@ -5,7 +5,19 @@ Changelog (Pillow)
 10.2.0 (unreleased)
 -------------------
 
-- Raise ValueError when TrueType font size is not greater than zero #7584
+- Added support for reading DX10 BC4 DDS images #7603
+  [sambvfx, radarhere]
+
+- Optimized ImageStat.Stat.count #7599
+  [florath]
+
+- Correct PDF palette size when saving #7555
+  [radarhere]
+
+- Fixed closing file pointer with olefile 0.47 #7594
+  [radarhere]
+
+- Raise ValueError when TrueType font size is not greater than zero #7584, #7587
   [akx, radarhere]
 
 - If absent, do not try to close fp when closing image #7557

RELEASING.md

@@ -94,7 +94,6 @@ Released as needed privately to individual vendors for critical security-related
 
 ## Source and Binary Distributions
 
-### macOS and Linux
 * [ ] Download sdist and wheels from the [GitHub Actions "Wheels" workflow](https://github.com/python-pillow/Pillow/actions/workflows/wheels.yml)
   and copy into `dist/`. For example using [GitHub CLI](https://github.com/cli/cli):
   ```bash
@@ -104,14 +103,6 @@ Released as needed privately to individual vendors for critical security-related
 * [ ] Download the Linux aarch64 wheels created by Travis CI from [GitHub releases](https://github.com/python-pillow/Pillow/releases)
   and copy into `dist`.
 
-### Windows
-* [ ] Download the artifacts from the [GitHub Actions "Test Windows" workflow](https://github.com/python-pillow/Pillow/actions/workflows/test-windows.yml)
-  and copy into `dist/`. For example using [GitHub CLI](https://github.com/cli/cli):
-  ```bash
-  gh run download --dir dist
-  # select dist-x.y.z
-  ```
-
 ## Publicize Release
 
 * [ ] Announce release availability via [Twitter](https://twitter.com/pythonpillow) and [Mastodon](https://fosstodon.org/@pillow) e.g. https://twitter.com/PythonPillow/status/1013789184354603010

Tests/test_file_apng.py

@@ -356,9 +356,7 @@ def test_apng_save(tmp_path):
         assert im.getpixel((64, 32)) == (0, 255, 0, 255)
 
     with Image.open("Tests/images/apng/single_frame_default.png") as im:
-        frames = []
-        for frame_im in ImageSequence.Iterator(im):
-            frames.append(frame_im.copy())
+        frames = [frame_im.copy() for frame_im in ImageSequence.Iterator(im)]
         frames[0].save(
             test_file, save_all=True, default_image=True, append_images=frames[1:]
         )

Tests/test_file_dds.py

@@ -12,6 +12,8 @@ TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
 TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
 TEST_FILE_ATI1 = "Tests/images/ati1.dds"
 TEST_FILE_ATI2 = "Tests/images/ati2.dds"
+TEST_FILE_DX10_BC4_TYPELESS = "Tests/images/bc4_typeless.dds"
+TEST_FILE_DX10_BC4_UNORM = "Tests/images/bc4_unorm.dds"
 TEST_FILE_DX10_BC5_TYPELESS = "Tests/images/bc5_typeless.dds"
 TEST_FILE_DX10_BC5_UNORM = "Tests/images/bc5_unorm.dds"
 TEST_FILE_DX10_BC5_SNORM = "Tests/images/bc5_snorm.dds"
@@ -82,6 +84,27 @@ def test_sanity_ati1():
         assert_image_equal_tofile(im, TEST_FILE_ATI1.replace(".dds", ".png"))
 
 
+@pytest.mark.parametrize(
+    "image_path",
+    (
+        TEST_FILE_DX10_BC4_UNORM,
+        # hexeditted to be typeless
+        TEST_FILE_DX10_BC4_TYPELESS,
+    ),
+)
+def test_dx10_bc4(image_path):
+    """Check DX10 BC4 images can be opened"""
+
+    with Image.open(image_path) as im:
+        im.load()
+
+        assert im.format == "DDS"
+        assert im.mode == "L"
+        assert im.size == (64, 64)
+
+        assert_image_equal_tofile(im, TEST_FILE_DX10_BC4_UNORM.replace(".dds", ".png"))
+
+
 @pytest.mark.parametrize(
     "image_path",
     (

docs/handbook/image-file-formats.rst

@@ -521,6 +521,19 @@ The :py:meth:`~PIL.Image.Image.save` method supports the following options:
 
     .. versionadded:: 2.5.0
 
+**streamtype**
+    Allows storing images without quantization and Huffman tables, or with
+    these tables but without image data.  This is useful for container formats
+    or network protocols that handle tables separately and share them between
+    images.
+
+    * ``0`` (default): interchange datastream, with tables and image data
+    * ``1``: abbreviated table specification (tables-only) datastream
+
+      .. versionadded:: 10.2.0
+
+    * ``2``: abbreviated image (image-only) datastream
+
 **comment**
     A comment about the image.
 

docs/installation.rst

@@ -95,11 +95,10 @@ and :pypi:`olefile` for Pillow to read FPX and MIC images::
 
 .. tab:: Windows
 
-    .. warning:: Pillow > 9.5.0 no longer includes 32-bit wheels.
-
-    We provide Pillow binaries for Windows compiled for the matrix of
-    supported Pythons in 64-bit versions in the wheel format. These binaries include
-    support for all optional libraries except libimagequant and libxcb. Raqm support
+    We provide Pillow binaries for Windows compiled for the matrix of supported
+    Pythons in the wheel format. These include x86, x86-64 and arm64 versions
+    (with the exception of Python 3.8 on arm64). These binaries include support
+    for all optional libraries except libimagequant and libxcb. Raqm support
     requires FriBiDi to be installed separately::
 
         python3 -m pip install --upgrade pip
@@ -176,7 +175,7 @@ Many of Pillow's features require external libraries:
 * **littlecms** provides color management
 
   * Pillow version 2.2.1 and below uses liblcms1, Pillow 2.3.0 and
-    above uses liblcms2. Tested with **1.19** and **2.7-2.15**.
+    above uses liblcms2. Tested with **1.19** and **2.7-2.16**.
 
 * **libwebp** provides the WebP format.
 

src/PIL/DdsImagePlugin.py

@@ -98,6 +98,8 @@ DXT5_FOURCC = 0x35545844
 DXGI_FORMAT_R8G8B8A8_TYPELESS = 27
 DXGI_FORMAT_R8G8B8A8_UNORM = 28
 DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29
+DXGI_FORMAT_BC4_TYPELESS = 79
+DXGI_FORMAT_BC4_UNORM = 80
 DXGI_FORMAT_BC5_TYPELESS = 82
 DXGI_FORMAT_BC5_UNORM = 83
 DXGI_FORMAT_BC5_SNORM = 84
@@ -190,7 +192,11 @@ class DdsImageFile(ImageFile.ImageFile):
                 # ignoring flags which pertain to volume textures and cubemaps
                 (dxgi_format,) = struct.unpack("<I", self.fp.read(4))
                 self.fp.read(16)
-                if dxgi_format in (DXGI_FORMAT_BC5_TYPELESS, DXGI_FORMAT_BC5_UNORM):
+                if dxgi_format in (DXGI_FORMAT_BC4_TYPELESS, DXGI_FORMAT_BC4_UNORM):
+                    self.pixel_format = "BC4"
+                    n = 4
+                    self._mode = "L"
+                elif dxgi_format in (DXGI_FORMAT_BC5_TYPELESS, DXGI_FORMAT_BC5_UNORM):
                     self.pixel_format = "BC5"
                     n = 5
                     self._mode = "RGB"

src/PIL/FpxImagePlugin.py

@@ -97,16 +97,15 @@ class FpxImageFile(ImageFile.ImageFile):
 
         s = prop[0x2000002 | id]
 
-        colors = []
         bands = i32(s, 4)
         if bands > 4:
             msg = "Invalid number of bands"
             raise OSError(msg)
-        for i in range(bands):
-            # note: for now, we ignore the "uncalibrated" flag
-            colors.append(i32(s, 8 + i * 4) & 0x7FFFFFFF)
 
-        self._mode, self.rawmode = MODES[tuple(colors)]
+        # note: for now, we ignore the "uncalibrated" flag
+        colors = tuple(i32(s, 8 + i * 4) & 0x7FFFFFFF for i in range(bands))
+
+        self._mode, self.rawmode = MODES[colors]
 
         # load JPEG tables, if any
         self.jpeg = {}

src/PIL/Image.py

@@ -1288,9 +1288,9 @@ class Image:
         if self.im.bands == 1 or multiband:
             return self._new(filter.filter(self.im))
 
-        ims = []
-        for c in range(self.im.bands):
-            ims.append(self._new(filter.filter(self.im.getband(c))))
+        ims = [
+            self._new(filter.filter(self.im.getband(c))) for c in range(self.im.bands)
+        ]
         return merge(self.mode, ims)
 
     def getbands(self):
@@ -1339,10 +1339,7 @@ class Image:
         self.load()
         if self.mode in ("1", "L", "P"):
             h = self.im.histogram()
-            out = []
-            for i in range(256):
-                if h[i]:
-                    out.append((h[i], i))
+            out = [(h[i], i) for i in range(256) if h[i]]
             if len(out) > maxcolors:
                 return None
             return out
@@ -1383,10 +1380,7 @@ class Image:
 
         self.load()
         if self.im.bands > 1:
-            extrema = []
-            for i in range(self.im.bands):
-                extrema.append(self.im.getband(i).getextrema())
-            return tuple(extrema)
+            return tuple(self.im.getband(i).getextrema() for i in range(self.im.bands))
         return self.im.getextrema()
 
     def _getxmp(self, xmp_tags):

src/PIL/ImageCms.py

@@ -787,11 +787,8 @@ def getProfileInfo(profile):
         # info was description \r\n\r\n copyright \r\n\r\n K007 tag \r\n\r\n whitepoint
         description = profile.profile.profile_description
         cpright = profile.profile.copyright
-        arr = []
-        for elt in (description, cpright):
-            if elt:
-                arr.append(elt)
-        return "\r\n\r\n".join(arr) + "\r\n\r\n"
+        elements = [element for element in (description, cpright) if element]
+        return "\r\n\r\n".join(elements) + "\r\n\r\n"
 
     except (AttributeError, OSError, TypeError, ValueError) as v:
         raise PyCMSError(v) from v

src/PIL/ImageFont.py

@@ -188,6 +188,10 @@ class FreeTypeFont:
     def __init__(self, font=None, size=10, index=0, encoding="", layout_engine=None):
         # FIXME: use service provider instead
 
+        if size <= 0:
+            msg = "font size must be greater than 0"
+            raise ValueError(msg)
+
         self.path = font
         self.size = size
         self.index = index
@@ -791,10 +795,6 @@ def truetype(font=None, size=10, index=0, encoding="", layout_engine=None):
     :exception ValueError: If the font size is not greater than zero.
     """
 
-    if size <= 0:
-        msg = "font size must be greater than 0"
-        raise ValueError(msg)
-
     def freetype(font):
         return FreeTypeFont(font, size, index, encoding, layout_engine)
 

src/PIL/ImageOps.py

@@ -557,9 +557,7 @@ def invert(image):
     :param image: The image to invert.
     :return: An image.
     """
-    lut = []
-    for i in range(256):
-        lut.append(255 - i)
+    lut = list(range(255, -1, -1))
     return image.point(lut) if image.mode == "1" else _lut(image, lut)
 
 
@@ -581,10 +579,8 @@ def posterize(image, bits):
     :param bits: The number of bits to keep for each channel (1-8).
     :return: An image.
     """
-    lut = []
     mask = ~(2 ** (8 - bits) - 1)
-    for i in range(256):
-        lut.append(i & mask)
+    lut = [i & mask for i in range(256)]
     return _lut(image, lut)
 
 

src/PIL/ImagePalette.py

@@ -200,21 +200,15 @@ def raw(rawmode, data):
 
 
 def make_linear_lut(black, white):
-    lut = []
     if black == 0:
-        for i in range(256):
-            lut.append(white * i // 255)
-    else:
-        msg = "unavailable when black is non-zero"
-        raise NotImplementedError(msg)  # FIXME
-    return lut
+        return [white * i // 255 for i in range(256)]
+
+    msg = "unavailable when black is non-zero"
+    raise NotImplementedError(msg)  # FIXME
 
 
 def make_gamma_lut(exp):
-    lut = []
-    for i in range(256):
-        lut.append(int(((i / 255.0) ** exp) * 255.0 + 0.5))
-    return lut
+    return [int(((i / 255.0) ** exp) * 255.0 + 0.5) for i in range(256)]
 
 
 def negative(mode="RGB"):
@@ -226,9 +220,7 @@ def negative(mode="RGB"):
 def random(mode="RGB"):
     from random import randint
 
-    palette = []
-    for i in range(256 * len(mode)):
-        palette.append(randint(0, 255))
+    palette = [randint(0, 255) for _ in range(256 * len(mode))]
     return ImagePalette(mode, palette)
 
 

src/PIL/ImageQt.py

@@ -103,12 +103,10 @@ def align8to32(bytes, width, mode):
     if not extra_padding:
         return bytes
 
-    new_data = []
-    for i in range(len(bytes) // bytes_per_line):
-        new_data.append(
-            bytes[i * bytes_per_line : (i + 1) * bytes_per_line]
-            + b"\x00" * extra_padding
-        )
+    new_data = [
+        bytes[i * bytes_per_line : (i + 1) * bytes_per_line] + b"\x00" * extra_padding
+        for i in range(len(bytes) // bytes_per_line)
+    ]
 
     return b"".join(new_data)
 
@@ -131,15 +129,11 @@ def _toqclass_helper(im):
         format = qt_format.Format_Mono
     elif im.mode == "L":
         format = qt_format.Format_Indexed8
-        colortable = []
-        for i in range(256):
-            colortable.append(rgb(i, i, i))
+        colortable = [rgb(i, i, i) for i in range(256)]
     elif im.mode == "P":
         format = qt_format.Format_Indexed8
-        colortable = []
         palette = im.getpalette()
-        for i in range(0, len(palette), 3):
-            colortable.append(rgb(*palette[i : i + 3]))
+        colortable = [rgb(*palette[i : i + 3]) for i in range(0, len(palette), 3)]
     elif im.mode == "RGB":
         # Populate the 4th channel with 255
         im = im.convert("RGBA")

src/PIL/ImageStat.py

@@ -21,9 +21,7 @@
 # See the README file for information on usage and redistribution.
 #
 
-import functools
 import math
-import operator
 
 
 class Stat:
@@ -64,18 +62,11 @@ class Stat:
                     break
             return res_min, res_max
 
-        v = []
-        for i in range(0, len(self.h), 256):
-            v.append(minmax(self.h[i : i + 256]))
-        return v
+        return [minmax(self.h[i:]) for i in range(0, len(self.h), 256)]
 
     def _getcount(self):
         """Get total number of pixels in each layer"""
-
-        v = []
-        for i in range(0, len(self.h), 256):
-            v.append(functools.reduce(operator.add, self.h[i : i + 256]))
-        return v
+        return [sum(self.h[i : i + 256]) for i in range(0, len(self.h), 256)]
 
     def _getsum(self):
         """Get sum of all pixels in each layer"""
@@ -101,11 +92,7 @@ class Stat:
 
     def _getmean(self):
         """Get average pixel level for each layer"""
-
-        v = []
-        for i in self.bands:
-            v.append(self.sum[i] / self.count[i])
-        return v
+        return [self.sum[i] / self.count[i] for i in self.bands]
 
     def _getmedian(self):
         """Get median pixel level for each layer"""
@@ -124,28 +111,18 @@ class Stat:
 
     def _getrms(self):
         """Get RMS for each layer"""
-
-        v = []
-        for i in self.bands:
-            v.append(math.sqrt(self.sum2[i] / self.count[i]))
-        return v
+        return [math.sqrt(self.sum2[i] / self.count[i]) for i in self.bands]
 
     def _getvar(self):
         """Get variance for each layer"""
-
-        v = []
-        for i in self.bands:
-            n = self.count[i]
-            v.append((self.sum2[i] - (self.sum[i] ** 2.0) / n) / n)
-        return v
+        return [
+            (self.sum2[i] - (self.sum[i] ** 2.0) / self.count[i]) / self.count[i]
+            for i in self.bands
+        ]
 
     def _getstddev(self):
         """Get standard deviation for each layer"""
-
-        v = []
-        for i in self.bands:
-            v.append(math.sqrt(self.var[i]))
-        return v
+        return [math.sqrt(self.var[i]) for i in self.bands]
 
 
 Global = Stat  # compatibility

src/PIL/JpegImagePlugin.py

@@ -233,9 +233,7 @@ def SOF(self, marker):
         # fixup icc profile
         self.icclist.sort()  # sort by sequence number
         if self.icclist[0][13] == len(self.icclist):
-            profile = []
-            for p in self.icclist:
-                profile.append(p[14:])
+            profile = [p[14:] for p in self.icclist]
             icc_profile = b"".join(profile)
         else:
             icc_profile = None  # wrong number of fragments

src/PIL/MicImagePlugin.py

@@ -51,10 +51,11 @@ class MicImageFile(TiffImagePlugin.TiffImageFile):
         # find ACI subfiles with Image members (maybe not the
         # best way to identify MIC files, but what the... ;-)
 
-        self.images = []
-        for path in self.ole.listdir():
-            if path[1:] and path[0][-4:] == ".ACI" and path[1] == "Image":
-                self.images.append(path)
+        self.images = [
+            path
+            for path in self.ole.listdir()
+            if path[1:] and path[0][-4:] == ".ACI" and path[1] == "Image"
+        ]
 
         # if we didn't find any images, this is probably not
         # an MIC file.

src/PIL/PcfFontFile.py

@@ -129,9 +129,8 @@ class PcfFontFile(FontFile.FontFile):
         nprops = i32(fp.read(4))
 
         # read property description
-        p = []
-        for i in range(nprops):
-            p.append((i32(fp.read(4)), i8(fp.read(1)), i32(fp.read(4))))
+        p = [(i32(fp.read(4)), i8(fp.read(1)), i32(fp.read(4))) for _ in range(nprops)]
+
         if nprops & 3:
             fp.seek(4 - (nprops & 3), io.SEEK_CUR)  # pad
 
@@ -186,8 +185,6 @@ class PcfFontFile(FontFile.FontFile):
         #
         # bitmap data
 
-        bitmaps = []
-
         fp, format, i16, i32 = self._getformat(PCF_BITMAPS)
 
         nbitmaps = i32(fp.read(4))
@@ -196,13 +193,9 @@ class PcfFontFile(FontFile.FontFile):
             msg = "Wrong number of bitmaps"
             raise OSError(msg)
 
-        offsets = []
-        for i in range(nbitmaps):
-            offsets.append(i32(fp.read(4)))
+        offsets = [i32(fp.read(4)) for _ in range(nbitmaps)]
 
-        bitmap_sizes = []
-        for i in range(4):
-            bitmap_sizes.append(i32(fp.read(4)))
+        bitmap_sizes = [i32(fp.read(4)) for _ in range(4)]
 
         # byteorder = format & 4  # non-zero => MSB
         bitorder = format & 8  # non-zero => MSB
@@ -218,6 +211,7 @@ class PcfFontFile(FontFile.FontFile):
         if bitorder:
             mode = "1"
 
+        bitmaps = []
         for i in range(nbitmaps):
             xsize, ysize = metrics[i][:2]
             b, e = offsets[i : i + 2]

src/PIL/PdfImagePlugin.py

@@ -96,7 +96,7 @@ def _write_image(im, filename, existing_pdf, image_refs):
         dict_obj["ColorSpace"] = [
             PdfParser.PdfName("Indexed"),
             PdfParser.PdfName("DeviceRGB"),
-            255,
+            len(palette) // 3 - 1,
             PdfParser.PdfBinary(palette),
         ]
         procset = "ImageI"  # indexed color

src/PIL/SpiderImagePlugin.py

@@ -238,9 +238,7 @@ def makeSpiderHeader(im):
     if nvalues < 23:
         return []
 
-    hdr = []
-    for i in range(nvalues):
-        hdr.append(0.0)
+    hdr = [0.0] * nvalues
 
     # NB these are Fortran indices
     hdr[1] = 1.0  # nslice (=1 for an image)

winbuild/build_prepare.py

@@ -279,10 +279,10 @@ DEPS = {
         "libs": [r"objs\{msbuild_arch}\Release Static\freetype.lib"],
     },
     "lcms2": {
-        "url": SF_PROJECTS + "/lcms/files/lcms/2.15/lcms2-2.15.tar.gz/download",
-        "filename": "lcms2-2.15.tar.gz",
-        "dir": "lcms2-2.15",
-        "license": "COPYING",
+        "url": SF_PROJECTS + "/lcms/files/lcms/2.16/lcms2-2.16.tar.gz/download",
+        "filename": "lcms2-2.16.tar.gz",
+        "dir": "lcms2-2.16",
+        "license": "LICENSE",
         "patch": {
             r"Projects\VC2022\lcms2_static\lcms2_static.vcxproj": {
                 # default is /MD for x86 and /MT for x64, we need /MD always