Method doWriteMetadata

src/psdimage.cpp:327–545

}  // PsdImage::writeMetadata

void PsdImage::doWriteMetadata(BasicIo& outIo) {
  if (!io_->isopen())
    throw Error(ErrorCode::kerInputDataReadFailed);
  if (!outIo.isopen())
    throw Error(ErrorCode::kerImageWriteFailed);

#ifdef EXIV2_DEBUG_MESSAGES
  std::cout << "Exiv2::PsdImage::doWriteMetadata: Writing PSD file " << io_->path() << "\n";
  std::cout << "Exiv2::PsdImage::doWriteMetadata: tmp file created " << outIo.path() << "\n";
#endif

  // Ensure that this is the correct image type
  if (!isPsdType(*io_, true)) {
    if (io_->error() || io_->eof())
      throw Error(ErrorCode::kerInputDataReadFailed);
    throw Error(ErrorCode::kerNoImageInInputData);
  }

  io_->seek(0, BasicIo::beg);  // rewind

  DataBuf lbuf(4096);
  byte buf[8];

  // Get Photoshop header from original file
  byte psd_head[26];
  if (io_->read(psd_head, 26) != 26)
    throw Error(ErrorCode::kerNotAnImage, "Photoshop");

  // Write Photoshop header data out to new PSD file
  if (outIo.write(psd_head, 26) != 26)
    throw Error(ErrorCode::kerImageWriteFailed);

  // Read colorDataLength from original PSD
  if (io_->read(buf, 4) != 4)
    throw Error(ErrorCode::kerNotAnImage, "Photoshop");

  uint32_t colorDataLength = getULong(buf, bigEndian);

  // Write colorDataLength
  ul2Data(buf, colorDataLength, bigEndian);
  if (outIo.write(buf, 4) != 4)
    throw Error(ErrorCode::kerImageWriteFailed);
#ifdef EXIV2_DEBUG_MESSAGES
  std::cerr << std::dec << "colorDataLength: " << colorDataLength << "\n";
#endif
  // Copy colorData
  size_t readTotal = 0;
  while (readTotal < colorDataLength) {
    size_t toRead =
        (colorDataLength - readTotal) < lbuf.size() ? static_cast<size_t>(colorDataLength) - readTotal : lbuf.size();
    if (io_->read(lbuf.data(), toRead) != toRead)
      throw Error(ErrorCode::kerNotAnImage, "Photoshop");
    readTotal += toRead;
    if (outIo.write(lbuf.c_data(), toRead) != toRead)
      throw Error(ErrorCode::kerImageWriteFailed);
  }
  if (outIo.error())
    throw Error(ErrorCode::kerImageWriteFailed);