Method GetFormat

IO/Image/vtkTIFFReader.cxx:670–710

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//------------------------------------------------------------------------------
unsigned int vtkTIFFReader::GetFormat()
{
  if (this->ImageFormat != vtkTIFFReader::NOFORMAT)
  {
    return this->ImageFormat;
  }

  switch (this->InternalImage->Photometrics)
  {
    case PHOTOMETRIC_RGB:
    case PHOTOMETRIC_YCBCR:
      this->ImageFormat = vtkTIFFReader::RGB;
      return this->ImageFormat;
    case PHOTOMETRIC_MINISWHITE:
    case PHOTOMETRIC_MINISBLACK:
      this->ImageFormat = vtkTIFFReader::GRAYSCALE;
      return this->ImageFormat;
    case PHOTOMETRIC_PALETTE:
      if (this->IgnoreColorMap)
      {
        // ignore color map; setting vtkTIFFReader::PALETTE_GRAYSCALE ensures
        // we'll pick correct number of components.
        this->ImageFormat = vtkTIFFReader::PALETTE_GRAYSCALE;
        return this->ImageFormat;
      }
      for (unsigned int cc = 0; cc < 256; ++cc)
      {
        unsigned short red, green, blue;
        this->GetColor(cc, &red, &green, &blue);
        if (red != green || red != blue)
        {
          this->ImageFormat = vtkTIFFReader::PALETTE_RGB;
          return this->ImageFormat;
        }
      }
      this->ImageFormat = vtkTIFFReader::PALETTE_GRAYSCALE;
      return this->ImageFormat;
  }
  this->ImageFormat = vtkTIFFReader::OTHER;
  return this->ImageFormat;
}

//------------------------------------------------------------------------------
void vtkTIFFReader::GetColor(