[feature] add copy_to_another_image()

pyexiv2/core.py

@@ -127,6 +127,16 @@ def clear_icc(self):
     def clear_thumbnail(self):
         self.img.clear_thumbnail()
 
+    def copy_to_another_image(self, filename, encoding='utf-8', clean_before_copy=True,
+                              exif=True, iptc=True, xmp=True,
+                              comment=True, icc=True, thumbnail=True):
+        """ Copy metadata from one image to another image.
+        By default, it will clean the existing metadata in another image before copying.
+        """
+        self.img.copy_to_another_image(filename.encode(encoding), clean_before_copy,
+                                       exif, iptc, xmp,
+                                       comment, icc, thumbnail)
+
 
 class ImageData(Image):
     """

pyexiv2/lib/exiv2api.cpp

@@ -423,6 +423,54 @@ class Image{
         check_error_log();
     }
 
+    void copy_to_another_image(const char *filename, bool clean_before_copy,
+                               bool exif, bool iptc, bool xmp,
+                               bool comment, bool icc, bool thumbnail)
+    {
+        // Open another image
+        auto another_image = Exiv2::ImageFactory::open(filename);
+        if (another_image.get() == 0)
+            throw Exiv2::Error(Exiv2::ErrorCode::kerErrorMessage, "Can not open this image.");
+
+        // Whether to preserve the existing metadata in another image
+        if (!clean_before_copy) {
+            another_image->readMetadata();
+        }
+
+        // Start copying
+        if (exif) {
+            another_image->setExifData((*img)->exifData());
+        }
+        if (iptc) {
+            another_image->setIptcData((*img)->iptcData());
+        }
+        if (xmp) {
+            another_image->setXmpPacket((*img)->xmpPacket());
+        }
+        if (comment) {
+            another_image->setComment((*img)->comment());
+        }
+        if (icc) {
+            Exiv2::DataBuf buf = (*img)->iccProfile();
+            another_image->setIccProfile(std::move(buf));
+        }
+        if (thumbnail) {
+            Exiv2::ExifThumb exifThumb(another_image->exifData());
+            Exiv2::DataBuf buf = exifThumb.copy();
+            exifThumb.setJpegThumbnail(buf.c_data(), buf.size());
+        }
+
+        // Save another image
+        another_image->writeMetadata();
+        check_error_log();
+    }
+
+    // void copy_to_another_image(Buffer buffer, bool clean_before_copy)
+    // {
+    //     *img = Exiv2::ImageFactory::open((Exiv2::byte *)buffer.data, buffer.size);
+    //     if (img->get() == 0)
+    //         throw Exiv2::Error(Exiv2::ErrorCode::kerErrorMessage, "Can not open this image.");
+    // }
 };
 
 py::object convert_exif_to_xmp(py::list table, py::str encoding)
@@ -597,30 +645,31 @@ PYBIND11_MODULE(exiv2api, m)
     py::class_<Image>(m, "Image")
         .def(py::init<const char *>())
         .def(py::init<Buffer &>())
-        .def("close_image"      , &Image::close_image)
-        .def("get_bytes"        , &Image::get_bytes)
-        .def("get_mime_type"    , &Image::get_mime_type)
-        .def("get_access_mode"  , &Image::get_access_mode)
-        .def("read_exif"        , &Image::read_exif)
-        .def("read_iptc"        , &Image::read_iptc)
-        .def("read_xmp"         , &Image::read_xmp)
-        .def("read_raw_xmp"     , &Image::read_raw_xmp)
-        .def("read_comment"     , &Image::read_comment)
-        .def("read_icc"         , &Image::read_icc)
-        .def("read_thumbnail"   , &Image::read_thumbnail)
-        .def("modify_exif"      , &Image::modify_exif)
-        .def("modify_iptc"      , &Image::modify_iptc)
-        .def("modify_xmp"       , &Image::modify_xmp)
-        .def("modify_raw_xmp"   , &Image::modify_raw_xmp)
-        .def("modify_comment"   , &Image::modify_comment)
-        .def("modify_icc"       , &Image::modify_icc)
-        .def("modify_thumbnail" , &Image::modify_thumbnail)
-        .def("clear_exif"       , &Image::clear_exif)
-        .def("clear_iptc"       , &Image::clear_iptc)
-        .def("clear_xmp"        , &Image::clear_xmp)
-        .def("clear_comment"    , &Image::clear_comment)
-        .def("clear_icc"        , &Image::clear_icc)
-        .def("clear_thumbnail"  , &Image::clear_thumbnail);
+        .def("close_image"           , &Image::close_image)
+        .def("get_bytes"             , &Image::get_bytes)
+        .def("get_mime_type"         , &Image::get_mime_type)
+        .def("get_access_mode"       , &Image::get_access_mode)
+        .def("read_exif"             , &Image::read_exif)
+        .def("read_iptc"             , &Image::read_iptc)
+        .def("read_xmp"              , &Image::read_xmp)
+        .def("read_raw_xmp"          , &Image::read_raw_xmp)
+        .def("read_comment"          , &Image::read_comment)
+        .def("read_icc"              , &Image::read_icc)
+        .def("read_thumbnail"        , &Image::read_thumbnail)
+        .def("modify_exif"           , &Image::modify_exif)
+        .def("modify_iptc"           , &Image::modify_iptc)
+        .def("modify_xmp"            , &Image::modify_xmp)
+        .def("modify_raw_xmp"        , &Image::modify_raw_xmp)
+        .def("modify_comment"        , &Image::modify_comment)
+        .def("modify_icc"            , &Image::modify_icc)
+        .def("modify_thumbnail"      , &Image::modify_thumbnail)
+        .def("clear_exif"            , &Image::clear_exif)
+        .def("clear_iptc"            , &Image::clear_iptc)
+        .def("clear_xmp"             , &Image::clear_xmp)
+        .def("clear_comment"         , &Image::clear_comment)
+        .def("clear_icc"             , &Image::clear_icc)
+        .def("clear_thumbnail"       , &Image::clear_thumbnail)
+        .def("copy_to_another_image" , &Image::copy_to_another_image);
     m.def("convert_exif_to_xmp" , &convert_exif_to_xmp);
     m.def("convert_iptc_to_xmp" , &convert_iptc_to_xmp);
     m.def("convert_xmp_to_exif" , &convert_xmp_to_exif);