示例#1
0
Exiv2::Value* kmdValueToExivXmpValue(const KisMetaData::Value& value)
{
    //Q_ASSERT(value.type() != KisMetaData::Value::Structure);
    switch (value.type()) {
    case KisMetaData::Value::Invalid:
        return new Exiv2::DataValue(Exiv2::invalidTypeId);
    case KisMetaData::Value::Variant: {
        QVariant var = value.asVariant();
        if (var.type() == QVariant::Bool) {
            if (var.toBool()) {
                return new Exiv2::XmpTextValue("True");
            } else {
                return new Exiv2::XmpTextValue("False");
            }
        } else {
            //Q_ASSERT(var.canConvert(QVariant::String));
            return new Exiv2::XmpTextValue(var.toString().toLatin1().constData());
        }
    }
    case KisMetaData::Value::Rational: {
        QString rat = "%1 / %2";
        rat = rat.arg(value.asRational().numerator);
        rat = rat.arg(value.asRational().denominator);
        return new Exiv2::XmpTextValue(rat.toLatin1().constData());
    }
    case KisMetaData::Value::AlternativeArray:
    case KisMetaData::Value::OrderedArray:
    case KisMetaData::Value::UnorderedArray: {
        Exiv2::XmpArrayValue* arrV = new Exiv2::XmpArrayValue;
        switch (value.type()) {
        case KisMetaData::Value::OrderedArray:
            arrV->setXmpArrayType(Exiv2::XmpValue::xaSeq);
            break;
        case KisMetaData::Value::UnorderedArray:
            arrV->setXmpArrayType(Exiv2::XmpValue::xaBag);
            break;
        case KisMetaData::Value::AlternativeArray:
            arrV->setXmpArrayType(Exiv2::XmpValue::xaAlt);
            break;
        default:
            // Cannot happen
            ;
        }
        Q_FOREACH (const KisMetaData::Value& v, value.asArray()) {
            Exiv2::Value* ev = kmdValueToExivXmpValue(v);
            if (ev) {
                arrV->read(ev->toString());
                delete ev;
            }
        }
        return arrV;
    }
    case KisMetaData::Value::LangArray: {
        Exiv2::Value* arrV = new Exiv2::LangAltValue;
        QMap<QString, KisMetaData::Value> langArray = value.asLangArray();
        for (QMap<QString, KisMetaData::Value>::iterator it = langArray.begin();
                it != langArray.end(); ++it) {
            QString exivVal;
            if (it.key() != "x-default") {
                exivVal = "lang=" + it.key() + ' ';
            }
            //Q_ASSERT(it.value().type() == KisMetaData::Value::Variant);
            QVariant var = it.value().asVariant();
            //Q_ASSERT(var.type() == QVariant::String);
            exivVal += var.toString();
            arrV->read(exivVal.toLatin1().constData());
        }
        return arrV;
    }
    case KisMetaData::Value::Structure:
    default: {
        warnKrita << "KisExiv2: Unhandled value type";
        return 0;
    }

    }
    warnKrita << "KisExiv2: Unhandled value type";
    return 0;
}
示例#2
0
// *****************************************************************************
// Main
int main()
try {
    // Container for all metadata
    Exiv2::ExifData exifData;

    // *************************************************************************
    // Add to the Exif data

    // Create a ASCII string value (note the use of create)
    Exiv2::Value* v = Exiv2::Value::create(Exiv2::asciiString);
    // Set the value to a string
    v->read("1999:12:31 23:59:59");
    // Add the value together with its key to the Exif data container
    Exiv2::ExifKey key("Exif.Photo.DateTimeOriginal");
    exifData.add(key, v);

    std::cout << "Added key \"" << key << "\", value \"" << *v << "\"\n";
    // Delete the memory allocated by Value::create
    delete v;

    // Now create a more interesting value (without using the create method)
    Exiv2::URationalValue* rv = new Exiv2::URationalValue;
    // Set two rational components from a string
    rv->read("1/2 1/3");
    // Add more elements through the extended interface of rational value 
    rv->value_.push_back(std::make_pair(2,3));
    rv->value_.push_back(std::make_pair(3,4));
    // Add the key and value pair to the Exif data
    key = Exiv2::ExifKey("Exif.Image.PrimaryChromaticities");
    exifData.add(key, rv);

    std::cout << "Added key \"" << key << "\", value \"" << *rv << "\"\n";
    // Delete memory allocated on the heap
    delete rv;

    // *************************************************************************
    // Modify Exif data

    // Find the timestamp metadatum by its key
    key = Exiv2::ExifKey("Exif.Photo.DateTimeOriginal");
    Exiv2::ExifData::iterator pos = exifData.findKey(key);
    if (pos == exifData.end()) throw Exiv2::Error("Key not found");
    // Modify the value
    std::string date = pos->toString();
    date.replace(0,4,"2000");
    pos->setValue(date); 
    std::cout << "Modified key \"" << key 
              << "\", new value \"" << pos->value() << "\"\n";

    // Find the other key
    key = Exiv2::ExifKey("Exif.Image.PrimaryChromaticities");
    pos = exifData.findKey(key);
    if (pos == exifData.end()) throw Exiv2::Error("Key not found");
    // Get a pointer to a copy of the value
    v = pos->getValue();
    // Downcast the Value pointer to its actual type
    rv = dynamic_cast<Exiv2::URationalValue*>(v);
    if (rv == 0) throw Exiv2::Error("Downcast failed");
    // Modify the value directly through the interface of URationalValue
    rv->value_[2] = std::make_pair(88,77);
    // Copy the modified value back to the metadatum
    pos->setValue(rv);
    // Delete the memory allocated by getValue
    delete v;
    std::cout << "Modified key \"" << key 
              << "\", new value \"" << pos->value() << "\"\n";

    // *************************************************************************
    // Delete metadata from the Exif data container

    // Delete the metadatum at iterator position pos
    key = Exiv2::ExifKey("Exif.Image.PrimaryChromaticities");
    pos = exifData.findKey(key);
    if (pos == exifData.end()) throw Exiv2::Error("Key not found");
    exifData.erase(pos);
    std::cout << "Deleted key \"" << key << "\"\n";

    // *************************************************************************
    // Finally, write the remaining Exif data to an image file
    int rc = exifData.write("img_2158.jpg");
    if (rc) {
        std::string error = Exiv2::ExifData::strError(rc, "img_2158.jpg");
        throw Exiv2::Error(error);
    }

    return 0;
}
catch (Exiv2::Error& e) {
    std::cout << "Caught Exiv2 exception '" << e << "'\n";
    return -1;
}