Method readMetadata

src/pgfimage.cpp:67–114

}  // PgfImage::PgfImage

void PgfImage::readMetadata() {
#ifdef EXIV2_DEBUG_MESSAGES
  std::cerr << "Exiv2::PgfImage::readMetadata: Reading PGF file " << io_->path() << "\n";
#endif
  if (io_->open() != 0) {
    throw Error(ErrorCode::kerDataSourceOpenFailed, io_->path(), strError());
  }
  IoCloser closer(*io_);
  // Ensure that this is the correct image type
  if (!isPgfType(*io_, true)) {
    if (io_->error() || io_->eof())
      throw Error(ErrorCode::kerFailedToReadImageData);
    throw Error(ErrorCode::kerNotAnImage, "PGF");
  }
  clearMetadata();

  readPgfMagicNumber(*io_);

  size_t headerSize = readPgfHeaderSize(*io_);
  readPgfHeaderStructure(*io_, pixelWidth_, pixelHeight_);

  // And now, the most interesting, the user data byte array where metadata are stored as small image.

  Internal::enforce(headerSize <= std::numeric_limits<size_t>::max() - 8, ErrorCode::kerCorruptedMetadata);
  size_t size = headerSize + 8 - io_->tell();

#ifdef EXIV2_DEBUG_MESSAGES
  std::cout << "Exiv2::PgfImage::readMetadata: Found Image data (" << size << " bytes)\n";
#endif

  if (size > io_->size())
    throw Error(ErrorCode::kerInputDataReadFailed);
  if (size == 0)
    return;

  DataBuf imgData(size);
  const size_t bufRead = io_->read(imgData.data(), imgData.size());
  if (io_->error())
    throw Error(ErrorCode::kerFailedToReadImageData);
  if (bufRead != imgData.size())
    throw Error(ErrorCode::kerInputDataReadFailed);

  auto image = Exiv2::ImageFactory::open(imgData.c_data(), imgData.size());
  image->readMetadata();
  exifData() = image->exifData();
  iptcData() = image->iptcData();
  xmpData() = image->xmpData();
}

void PgfImage::writeMetadata() {
  if (io_->open() != 0) {