Method ExecuteInformation

IO/Image/vtkGESignaReader.cxx:46–435

}

void vtkGESignaReader::ExecuteInformation()
{
  this->ComputeInternalFileName(this->DataExtent[4]);
  if (this->InternalFileName == nullptr)
  {
    return;
  }

  FILE* fp = vtksys::SystemTools::Fopen(this->InternalFileName, "rb");
  if (!fp)
  {
    vtkErrorMacro("Unable to open file " << this->InternalFileName);
    return;
  }

  int magic;
  if (fread(&magic, 4, 1, fp) != 1)
  {
    vtkErrorMacro("GESignaReader error reading file: " << this->FileName
                                                       << " Premature EOF while reading magic.");
    fclose(fp);
    return;
  }
  vtkByteSwap::Swap4BE(&magic);

  if (magic != 0x494d4746)
  {
    vtkErrorMacro(<< "Unknown file type! Not a GE ximg file!");
    fclose(fp);
    return;
  }

  // read in the pixel offset from the header
  int offset;
  if (fread(&offset, 4, 1, fp) != 1)
  {
    vtkErrorMacro("GESignaReader error reading file: "
      << this->FileName << " Premature EOF while reading pixel offset.");
    fclose(fp);
    return;
  }
  vtkByteSwap::Swap4BE(&offset);
  this->SetHeaderSize(offset);

  int width, height, depth;
  if (fread(&width, 4, 1, fp) != 1)
  {
    vtkErrorMacro("GESignaReader error reading file: " << this->FileName
                                                       << " Premature EOF while reading width.");
    fclose(fp);
    return;
  }
  vtkByteSwap::Swap4BE(&width);
  if (fread(&height, 4, 1, fp) != 1)
  {
    vtkErrorMacro("GESignaReader error reading file: " << this->FileName
                                                       << " Premature EOF while reading height.");
    fclose(fp);