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Support writing SIGNED_RATIONAL tag types

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This commit is contained in:
Andrew Murray 2025-10-24 03:55:45 +11:00
parent ddd4f00720
commit 82cdaa456c
2 changed files with 7 additions and 7 deletions
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7
Tests/test_file_libtiff.py
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@ -355,12 +355,15 @@ class TestFileLibTiff(LibTiffTestCase):
# Should not segfault
im.save(outfile)
def test_ifd(self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
@pytest.mark.parametrize("tagtype", (TiffTags.SIGNED_RATIONAL, TiffTags.IFD))
def test_tag_type(
self, tagtype: int, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", True)
ifd = TiffImagePlugin.ImageFileDirectory_v2()
ifd[37000] = 100
ifd.tagtype[37000] = TiffTags.IFD
ifd.tagtype[37000] = tagtype
out = tmp_path / "temp.tif"
im = Image.new("L", (1, 1))

7
src/encode.c
View File

@ -990,10 +990,6 @@ PyImaging_LibTiffEncoderNew(PyObject *self, PyObject *args) {
status = ImagingLibTiffSetField(
&encoder->state, (ttag_t)key_int, (FLOAT32)PyFloat_AsDouble(value)
);
} else if (type == TIFF_DOUBLE) {
status = ImagingLibTiffSetField(
&encoder->state, (ttag_t)key_int, (FLOAT64)PyFloat_AsDouble(value)
);
} else if (type == TIFF_SBYTE) {
status = ImagingLibTiffSetField(
&encoder->state, (ttag_t)key_int, (INT8)PyLong_AsLong(value)
@ -1002,7 +998,8 @@ PyImaging_LibTiffEncoderNew(PyObject *self, PyObject *args) {
status = ImagingLibTiffSetField(
&encoder->state, (ttag_t)key_int, PyBytes_AsString(value)
);
} else if (type == TIFF_RATIONAL) {
} else if (type == TIFF_DOUBLE || type == TIFF_SRATIONAL ||
type == TIFF_RATIONAL) {
status = ImagingLibTiffSetField(
&encoder->state, (ttag_t)key_int, (FLOAT64)PyFloat_AsDouble(value)
);