C++ AutoPtr::setComment方法代码示例

// *****************************************************************************
// Main
int main(int argc, char* const argv[])
{
try {
    // Handle command line arguments
    Params params;
    if (params.getopt(argc, argv)) {
        params.usage();
        return 1;
    }
    if (params.help_) {
        params.help();
        return 2;
    }

    // Use MemIo to increase test coverage.
    Exiv2::BasicIo::AutoPtr fileIo(new Exiv2::FileIo(params.read_));
    Exiv2::BasicIo::AutoPtr memIo(new Exiv2::MemIo);
    memIo->transfer(*fileIo);

    Exiv2::Image::AutoPtr readImg = Exiv2::ImageFactory::open(memIo);
    assert(readImg.get() != 0);
    readImg->readMetadata();

    Exiv2::Image::AutoPtr writeImg = Exiv2::ImageFactory::open(params.write_);
    assert(writeImg.get() != 0);
    if (params.preserve_) writeImg->readMetadata();
    if (params.iptc_) {
        writeImg->setIptcData(readImg->iptcData());
    }
    if (params.exif_) {
        writeImg->setExifData(readImg->exifData());
    }
    if (params.comment_) {
        writeImg->setComment(readImg->comment());
    }
    if (params.xmp_) {
        writeImg->setXmpData(readImg->xmpData());
    }

    try {
        writeImg->writeMetadata();
    }
    catch (const Exiv2::AnyError&) {
        std::cerr << params.progname() <<
            ": Could not write metadata to (" << params.write_ << ")\n";
        return 8;
    }

    return 0;
}
catch (Exiv2::AnyError& e) {
    std::cerr << "Caught Exiv2 exception '" << e << "'\n";
    return 10;
}
}

bool JpegContent::save(QIODevice* device)
{
    if (!d->mImage.isNull()) {
        if (!d->updateRawDataFromImage()) {
            return false;
        }
    }

    if (d->mRawData.size() == 0) {
        d->mErrorString = i18nc("@info", "No data to store.");
        return false;
    }

    if (d->mPendingTransformation) {
        applyPendingTransformation();
        d->mPendingTransformation = false;
    }

    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open((unsigned char*)d->mRawData.data(), d->mRawData.size());

    // Store Exif info
    image->setExifData(d->mExifData);
    image->setComment(d->mComment.toUtf8().data());
    image->writeMetadata();

    // Update mRawData
    Exiv2::BasicIo& io = image->io();
    d->mRawData.resize(io.size());
    io.read((unsigned char*)d->mRawData.data(), io.size());

    QDataStream stream(device);
    stream.writeRawData(d->mRawData.data(), d->mRawData.size());

    // Make sure we are up to date
    loadFromData(d->mRawData);
    return true;
}

bool KExiv2::Private::saveOperations(const QFileInfo& finfo, Exiv2::Image::AutoPtr image) const
{
    try
    {
        Exiv2::AccessMode mode;
        bool wroteComment = false, wroteEXIF = false, wroteIPTC = false, wroteXMP = false;

        // We need to load target file metadata to merge with new one. It's mandatory with TIFF format:
        // like all tiff file structure is based on Exif.
        image->readMetadata();

        // Image Comments ---------------------------------

        mode = image->checkMode(Exiv2::mdComment);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            image->setComment(imageComments());
            wroteComment = true;
        }

        // Exif metadata ----------------------------------

        mode = image->checkMode(Exiv2::mdExif);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            if (image->mimeType() == "image/tiff")
            {
                Exiv2::ExifData orgExif = image->exifData();
                Exiv2::ExifData newExif;
                QStringList     untouchedTags;

                // With tiff image we cannot overwrite whole Exif data as well, because
                // image data are stored in Exif container. We need to take a care about
                // to not lost image data.
                untouchedTags << "Exif.Image.ImageWidth";
                untouchedTags << "Exif.Image.ImageLength";
                untouchedTags << "Exif.Image.BitsPerSample";
                untouchedTags << "Exif.Image.Compression";
                untouchedTags << "Exif.Image.PhotometricInterpretation";
                untouchedTags << "Exif.Image.FillOrder";
                untouchedTags << "Exif.Image.SamplesPerPixel";
                untouchedTags << "Exif.Image.StripOffsets";
                untouchedTags << "Exif.Image.RowsPerStrip";
                untouchedTags << "Exif.Image.StripByteCounts";
                untouchedTags << "Exif.Image.XResolution";
                untouchedTags << "Exif.Image.YResolution";
                untouchedTags << "Exif.Image.PlanarConfiguration";
                untouchedTags << "Exif.Image.ResolutionUnit";

                for (Exiv2::ExifData::iterator it = orgExif.begin(); it != orgExif.end(); ++it)
                {
                    if (untouchedTags.contains(it->key().c_str()))
                    {
                        newExif[it->key().c_str()] = orgExif[it->key().c_str()];
                    }
                }

                Exiv2::ExifData readedExif = exifMetadata();

                for (Exiv2::ExifData::iterator it = readedExif.begin(); it != readedExif.end(); ++it)
                {
                    if (!untouchedTags.contains(it->key().c_str()))
                    {
                        newExif[it->key().c_str()] = readedExif[it->key().c_str()];
                    }
                }

                image->setExifData(newExif);
            }
            else
            {
                image->setExifData(exifMetadata());
            }

            wroteEXIF = true;
        }

        // Iptc metadata ----------------------------------

        mode = image->checkMode(Exiv2::mdIptc);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            image->setIptcData(iptcMetadata());
            wroteIPTC = true;
        }

        // Xmp metadata -----------------------------------

        mode = image->checkMode(Exiv2::mdXmp);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
#ifdef _XMP_SUPPORT_
            image->setXmpData(xmpMetadata());
            wroteXMP = true;
#endif
        }
//.........这里部分代码省略.........