// ***************************************************************** -*- C++ -*- /* Abstract : Sample program showing how to set the Exif comment of an image, Exif.Photo.UserComment File: exifcomment.cpp Version : $Rev: 485 $ Author(s): Andreas Huggel (ahu) <ahuggel@gmx.net> History : 10-May-04, ahu: created 16-Jan-05, ahu: updated using CommentValue and operator trickery */ // ***************************************************************************** // included header files #include "exif.hpp" #include <iostream> #include <iomanip> #include <cstring> // ***************************************************************************** // Main int main(int argc, char* const argv[]) try { if (argc != 2) { std::cout << "Usage: " << argv[0] << " file\n"; return 1; } Exiv2::ExifData exifData; int rc = exifData.read(argv[1]); if (rc) { std::string error = Exiv2::ExifData::strError(rc, argv[1]); throw Exiv2::Error(error); } /* Use Exiv2::CommentValue for Exif user comments. The format of the comment string includes an optional charset specification at the beginning: [charset=["]Ascii|Jis|Unicode|Undefined["] ]comment Undefined is used as a default if the comment doesn't start with a charset definition. Following are a few examples of valid comments. Only the last one is written to the file. */ Exiv2::CommentValue value("charset=Ascii An ASCII Exif comment added with Exiv2"); value.read("charset=\"Unicode\" An Unicode Exif comment added with Exiv2"); value.read("charset=\"Undefined\" An undefined Exif comment added with Exiv2"); value.read("Another undefined Exif comment added with Exiv2"); exifData["Exif.Photo.UserComment"] = value; std::cout << "Writing user comment '" << exifData["Exif.Photo.UserComment"] << "' back to the image\n"; rc = exifData.write(argv[1]); if (rc) { std::string error = Exiv2::ExifData::strError(rc, argv[1]); throw Exiv2::Error(error); } return rc; } catch (Exiv2::Error& e) { std::cout << "Caught Exiv2 exception '" << e << "'\n"; return -1; }