Function IsSpectralEXRFromMemory

Source/ThirdParty/tinyexr.h:11315–11338

Check if memory contains spectral EXR data

// Check if memory contains spectral EXR data
int IsSpectralEXRFromMemory(const unsigned char *memory, size_t size) {
  if (!memory || size < 8) return TINYEXR_ERROR_INVALID_DATA;

  EXRVersion version;
  int ret = ParseEXRVersionFromMemory(&version, memory, size);
  if (ret != TINYEXR_SUCCESS) return ret;

  const char *err = NULL;
  EXRHeader header;
  InitEXRHeader(&header);

  ret = ParseEXRHeaderFromMemory(&header, &version, memory, size, &err);
  if (ret != TINYEXR_SUCCESS) {
    if (err) FreeEXRErrorMessage(err);
    return ret;
  }

  // Check for spectralLayoutVersion attribute
  int is_spectral = (FindCustomAttribute(&header, "spectralLayoutVersion") != NULL);

  FreeEXRHeader(&header);

  return is_spectral ? TINYEXR_SUCCESS : TINYEXR_ERROR_INVALID_DATA;
}

#ifdef __clang__
// zero-as-null-pointer-constant