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Added custom string TIFF tags

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This commit is contained in:
Andrew Murray 2018-12-29 15:57:49 +11:00
parent 952de2ec4c
commit 6ead422e91
3 changed files with 18 additions and 7 deletions
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7
Tests/test_file_libtiff.py
View File

@ -235,7 +235,10 @@ class TestFileLibTiff(LibTiffTestCase):
def test_custom_metadata(self):
custom = {
37000: 4,
37001: 4.2
37001: 4.2,
37002: 'custom tag value',
37003: u'custom tag value',
37004: b'custom tag value'
}
libtiff_version = TiffImagePlugin._libtiff_version()
@ -256,6 +259,8 @@ class TestFileLibTiff(LibTiffTestCase):
reloaded = Image.open(out)
for tag, value in custom.items():
if libtiff and isinstance(value, bytes):
value = value.decode()
self.assertEqual(reloaded.tag_v2[tag], value)
def test_int_dpi(self):

10
src/PIL/TiffImagePlugin.py
View File

@ -1519,12 +1519,16 @@ def _save(im, fp, filename):
getattr(im, 'tag_v2', {}).items(),
legacy_ifd.items()):
# Libtiff can only process certain core items without adding
# them to the custom dictionary. Support has only been been added
# for int and float values
# them to the custom dictionary.
# Support for custom items has only been been added
# for int, float, unicode, string and byte values
if tag not in TiffTags.LIBTIFF_CORE:
if TiffTags.lookup(tag).type == TiffTags.UNDEFINED:
continue
if (distutils.version.StrictVersion(_libtiff_version()) <
distutils.version.StrictVersion("4.0")) \
or not (isinstance(value, int) or isinstance(value, float)):
or not (isinstance(value, (int, float, str, bytes)) or
(not py3 and isinstance(value, unicode))): # noqa: F821
continue
if tag not in atts and tag not in blocklist:
if isinstance(value, str if py3 else unicode): # noqa: F821

8
src/encode.c
View File

@ -885,9 +885,11 @@ PyImaging_LibTiffEncoderNew(PyObject* self, PyObject* args)
}
} else if (PyBytes_Check(value)) {
TRACE(("Setting from Bytes: %d, %s \n", key_int, PyBytes_AsString(value)));
status = ImagingLibTiffSetField(&encoder->state,
(ttag_t) PyInt_AsLong(key),
PyBytes_AsString(value));
if (is_core_tag || !ImagingLibTiffMergeFieldInfo(&encoder->state, TIFF_ASCII, key_int)) {
status = ImagingLibTiffSetField(&encoder->state,
(ttag_t) PyInt_AsLong(key),
PyBytes_AsString(value));
}
} else if (PyTuple_Check(value)) {
Py_ssize_t len,i;
float *floatav;