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PIL.features: Add a compile-time zlib-ng feature flag and version number

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This commit is contained in:
Nulano 2024-10-25 20:37:21 +02:00
parent 3e0849bfb5
commit 7885066e5f
4 changed files with 24 additions and 1 deletions
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3
Tests/check_wheel.py
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@ -34,10 +34,13 @@ def test_wheel_features() -> None:
"fribidi",
"harfbuzz",
"libjpeg_turbo",
"zlib_ng",
"xcb",
}
if sys.platform == "win32":
expected_features.remove("xcb")
else:
expected_features.remove("zlib_ng")
assert set(features.get_supported_features()) == expected_features

1
docs/reference/features.rst
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@ -54,6 +54,7 @@ Feature version numbers are available only where stated.
Support for the following features can be checked:
* ``libjpeg_turbo``: (compile time) Whether Pillow was compiled against the libjpeg-turbo version of libjpeg. Compile-time version number is available.
* ``zlib_ng``: (compile time) Whether Pillow was compiled against the zlib-ng version of zlib. Compile-time version number is available.
* ``raqm``: Raqm library, required for ``ImageFont.Layout.RAQM`` in :py:func:`PIL.ImageFont.truetype`. Run-time version number is available for Raqm 0.7.0 or newer.
* ``libimagequant``: (compile time) ImageQuant quantization support in :py:func:`PIL.Image.Image.quantize`. Run-time version number is available.
* ``xcb``: (compile time) Support for X11 in :py:func:`PIL.ImageGrab.grab` via the XCB library.

7
src/PIL/features.py
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@ -127,6 +127,7 @@ features: dict[str, tuple[str, str | bool, str | None]] = {
"fribidi": ("PIL._imagingft", "HAVE_FRIBIDI", "fribidi_version"),
"harfbuzz": ("PIL._imagingft", "HAVE_HARFBUZZ", "harfbuzz_version"),
"libjpeg_turbo": ("PIL._imaging", "HAVE_LIBJPEGTURBO", "libjpeg_turbo_version"),
"zlib_ng": ("PIL._imaging", "HAVE_ZLIBNG", "zlib_ng_version"),
"libimagequant": ("PIL._imaging", "HAVE_LIBIMAGEQUANT", "imagequant_version"),
"xcb": ("PIL._imaging", "HAVE_XCB", None),
}
@ -308,7 +309,11 @@ def pilinfo(out: IO[str] | None = None, supported_formats: bool = True) -> None:
# this check is also in src/_imagingcms.c:setup_module()
version_static = tuple(int(x) for x in v.split(".")) < (2, 7)
t = "compiled for" if version_static else "loaded"
if name == "raqm":
if name == "zlib":
zlib_ng_version = version_feature("zlib_ng")
if zlib_ng_version is not None:
v += ", compiled for zlib-ng " + zlib_ng_version
elif name == "raqm":
for f in ("fribidi", "harfbuzz"):
v2 = version_feature(f)
if v2 is not None:

14
src/_imaging.c
View File

@ -4397,6 +4397,20 @@ setup_module(PyObject *m) {
}
#endif
PyObject *have_zlibng;
#ifdef ZLIBNG_VERSION
have_zlibng = Py_True;
{
PyObject *v = PyUnicode_FromString(ZLIBNG_VERSION);
PyDict_SetItemString(d, "zlib_ng_version", v ? v : Py_None);
Py_XDECREF(v);
}
#else
have_zlibng = Py_False;
#endif
Py_INCREF(have_zlibng);
PyModule_AddObject(m, "HAVE_ZLIBNG", have_zlibng);
#ifdef HAVE_LIBTIFF
{
extern const char *ImagingTiffVersion(void);