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Allow to modify/create EXIF 2.3 ASCII tags (#2795)

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* Allow to modify/create EXIF 2.3 ASCII tags

Make `tag_is_ascii` aware of the EXIF 2.3 ASCII tags that are
available since libexif 0.6.22.

See: https://github.com/kleisauke/net-vips/issues/167

* Fix CI
This commit is contained in:
Kleis Auke Wolthuizen 2022-05-10 09:13:22 +02:00 committed by GitHub
parent ceaa2d2096
commit d91cfa4e53
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 44 additions and 1 deletions
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8
configure.ac
View File

@ -1467,6 +1467,14 @@ if test x"$with_libexif" != x"no"; then
[AC_DEFINE(HAVE_EXIF,1,[define if you have libexif >= 0.6 installed.])
with_libexif=yes
PACKAGES_USED="$PACKAGES_USED libexif"
# 0.6.22 adds a couple of EXIF 2.3 ASCII tags
PKG_CHECK_MODULES(EXIF_2_3_ASCII_TAGS, libexif >= 0.6.22,
[AC_DEFINE(HAVE_EXIF_2_3_ASCII_TAGS,1,[define if your libexif has EXIF 2.3 ASCII tags.])
],
[:
]
)
],
[AC_MSG_WARN([libexif >= 0.6 not found; disabling exif support])
with_libexif=no

10
libvips/foreign/exif.c
View File

@ -776,7 +776,15 @@ tag_is_ascii( ExifTag tag )
tag == EXIF_TAG_DATE_TIME_DIGITIZED ||
tag == EXIF_TAG_SUB_SEC_TIME ||
tag == EXIF_TAG_SUB_SEC_TIME_ORIGINAL ||
tag == EXIF_TAG_SUB_SEC_TIME_DIGITIZED );
tag == EXIF_TAG_SUB_SEC_TIME_DIGITIZED
#ifdef HAVE_EXIF_2_3_ASCII_TAGS
|| tag == EXIF_TAG_CAMERA_OWNER_NAME
|| tag == EXIF_TAG_BODY_SERIAL_NUMBER
|| tag == EXIF_TAG_LENS_MAKE
|| tag == EXIF_TAG_LENS_MODEL
|| tag == EXIF_TAG_LENS_SERIAL_NUMBER
#endif
);
}
static gboolean

4
meson.build
View File

@ -267,6 +267,10 @@ if libexif_dep.found()
# libexif includes don't need libexif prefix
cfg_var.set('UNTAGGED_EXIF', '1')
endif
# 0.6.22 adds a couple of EXIF 2.3 ASCII tags
if libexif_dep.version().version_compare('>=0.6.22')
cfg_var.set('HAVE_EXIF_2_3_ASCII_TAGS', '1')
endif
endif

23
test/test-suite/test_foreign.py
View File

@ -344,6 +344,29 @@ class TestForeign:
im = pyvips.Image.new_from_buffer(buf, "")
exif_removed(im)
@skip_if_no("jpegsave")
@pytest.mark.xfail(raises=pyvips.error.Error, reason="requires libexif >= 0.6.22")
def test_jpegsave_exif_2_3_ascii(self):
def exif_valid(im):
assert im.get("exif-ifd2-CameraOwnerName").find("ASCII, 14 components, 14 bytes") != -1
assert im.get("exif-ifd2-BodySerialNumber").find("ASCII, 14 components, 14 bytes") != -1
assert im.get("exif-ifd2-LensMake").find("ASCII, 14 components, 14 bytes") != -1
assert im.get("exif-ifd2-LensModel").find("ASCII, 14 components, 14 bytes") != -1
assert im.get("exif-ifd2-LensSerialNumber").find("ASCII, 14 components, 14 bytes") != -1
# first make sure we have exif support
im = pyvips.Image.new_from_file(JPEG_FILE)
if im.get_typeof("exif-ifd0-Orientation") != 0:
x = im.copy()
x.set_type(pyvips.GValue.gstr_type, "exif-ifd2-CameraOwnerName", "hello ( there")
x.set_type(pyvips.GValue.gstr_type, "exif-ifd2-BodySerialNumber", "hello ( there")
x.set_type(pyvips.GValue.gstr_type, "exif-ifd2-LensMake", "hello ( there")
x.set_type(pyvips.GValue.gstr_type, "exif-ifd2-LensModel", "hello ( there")
x.set_type(pyvips.GValue.gstr_type, "exif-ifd2-LensSerialNumber", "hello ( there")
buf = x.jpegsave_buffer()
y = pyvips.Image.new_from_buffer(buf, "")
exif_valid(y)
@skip_if_no("jpegload")
def test_truncated(self):
# This should open (there's enough there for the header)