Function SaveEXRMultipartImageToFile

third-party/tinyexr/tinyexr.h:8078–8133

}

int SaveEXRMultipartImageToFile(const EXRImage* exr_images,
                                const EXRHeader** exr_headers,
                                unsigned int num_parts,
                                const char* filename,
                                const char** err) {
  if (exr_images == NULL || exr_headers == NULL || num_parts < 2) {
    tinyexr::SetErrorMessage("Invalid argument for SaveEXRMultipartImageToFile",
                              err);
    return TINYEXR_ERROR_INVALID_ARGUMENT;
  }

  FILE *fp = NULL;
#ifdef _WIN32
#if defined(_MSC_VER) || (defined(MINGW_HAS_SECURE_API) && MINGW_HAS_SECURE_API) // MSVC, MinGW GCC, or Clang.
  errno_t errcode =
    _wfopen_s(&fp, tinyexr::UTF8ToWchar(filename).c_str(), L"wb");
  if (errcode != 0) {
    tinyexr::SetErrorMessage("Cannot write a file: " + std::string(filename),
                             err);
    return TINYEXR_ERROR_CANT_WRITE_FILE;
  }
#else
  // Unknown compiler or MinGW without MINGW_HAS_SECURE_API.
  fp = fopen(filename, "wb");
#endif
#else
  fp = fopen(filename, "wb");
#endif
  if (!fp) {
    tinyexr::SetErrorMessage("Cannot write a file: " + std::string(filename),
                             err);
    return TINYEXR_ERROR_CANT_WRITE_FILE;
  }

  unsigned char *mem = NULL;
  size_t mem_size = SaveEXRMultipartImageToMemory(exr_images, exr_headers, num_parts, &mem, err);
  if (mem_size == 0) {
    fclose(fp);
    return TINYEXR_ERROR_SERIALIZATION_FAILED;
  }

  size_t written_size = 0;
  if ((mem_size > 0) && mem) {
    written_size = fwrite(mem, 1, mem_size, fp);
  }
  free(mem);

  fclose(fp);

  if (written_size != mem_size) {
    tinyexr::SetErrorMessage("Cannot write a file", err);
    return TINYEXR_ERROR_CANT_WRITE_FILE;
  }

  return TINYEXR_SUCCESS;
}

int LoadDeepEXR(DeepImage *deep_image, const char *filename, const char **err) {