Copy metadata to another image.

From an original patch by Ilpo Nyyssönen (http://iny.iki.fi/).

4 files changed, 46 insertions, 0 deletions

diff --git a/src/exiv2wrapper.cpp b/src/exiv2wrapper.cpp
index b6c85cf..ab52892 100644
--- a/src/exiv2wrapper.cpp
+++ b/src/exiv2wrapper.cpp
@@ -404,6 +404,19 @@ boost::python::list Image::previews()
     return previews;
 }
 
+void Image::copyMetadata(Image& other, bool exif, bool iptc, bool xmp) const
+{
+    CHECK_METADATA_READ
+    if (!other._dataRead) throw Exiv2::Error(METADATA_NOT_READ);
+
+    if (exif)
+        other._exifData = _exifData;
+    if (iptc)
+        other._iptcData = _iptcData;
+    if (xmp)
+        other._xmpData = _xmpData;
+}
+
 
 ExifTag::ExifTag(const std::string& key, Exiv2::Exifdatum* datum, Exiv2::ExifData* data): _key(key)
 {
diff --git a/src/exiv2wrapper.hpp b/src/exiv2wrapper.hpp
index f6c305a..f87d032 100644
--- a/src/exiv2wrapper.hpp
+++ b/src/exiv2wrapper.hpp
@@ -221,6 +221,9 @@ public:
     // Read access to the thumbnail embedded in the image.
     boost::python::list previews();
 
+    // Copy the metadata to another image.
+    void copyMetadata(Image& other, bool exif=true, bool iptc=true, bool xmp=true) const;
+
 private:
     std::string _filename;
     Exiv2::Image::AutoPtr _image;
diff --git a/src/exiv2wrapper_python.cpp b/src/exiv2wrapper_python.cpp
index 7398194..a73eedf 100644
--- a/src/exiv2wrapper_python.cpp
+++ b/src/exiv2wrapper_python.cpp
@@ -132,6 +132,8 @@ BOOST_PYTHON_MODULE(libexiv2python)
         .def("deleteXmpTag", &Image::deleteXmpTag)
 
         .def("previews", &Image::previews)
+
+        .def("copyMetadata", &Image::copyMetadata)
     ;
 }
 
diff --git a/src/pyexiv2/metadata.py b/src/pyexiv2/metadata.py
index 7396aff..92a3f80 100644
--- a/src/pyexiv2/metadata.py
+++ b/src/pyexiv2/metadata.py
@@ -315,3 +315,31 @@ class ImageMetadata(object):
     def previews(self):
         return self._image.previews()
 
+    def copy(self, other, exif=True, iptc=True, xmp=True):
+        """
+        Copy the metadata to another image.
+        The metadata in the destination is overridden. In particular, if the
+        destination contains e.g. EXIF data and the source doesn't, it will be
+        erased in the destination, unless explicitely omitted.
+
+        @param other: the destination metadata to copy to
+        @type other:  L{pyexiv2.ImageMetadata}
+        @param exif:  whether to copy the EXIF metadata (C{True} by default)
+        @type exif:   C{bool}
+        @param iptc:  whether to copy the IPTC metadata (C{True} by default)
+        @type iptc:   C{bool}
+        @param xmp:   whether to copy the XMP metadata (C{True} by default)
+        @type xmp:    C{bool}
+        """
+        self._image.copyMetadata(other._image, exif, iptc, xmp)
+        # Empty the cache where needed
+        if exif:
+            other._keys['exif'] = None
+            other._tags['exif'] = {}
+        if iptc:
+            other._keys['iptc'] = None
+            other._tags['iptc'] = {}
+        if xmp:
+            other._keys['xmp'] = None
+            other._tags['xmp'] = {}
+