Function Targa_decodeImageData

radiantcore/imagefile/TGALoader.cpp:325–364

template<typename Flip>
RGBAImagePtr Targa_decodeImageData(const TargaHeader& targa_header, stream::PointerInputStream& istream, const Flip& flip)
{
  auto image = std::make_shared<RGBAImage>(targa_header.width, targa_header.height);

  if (targa_header.image_type == 2 || targa_header.image_type == 3)
  {
    switch (targa_header.pixel_size)
    {
    case 8:
      targa_decode_grayscale(istream, *image, flip);
      break;
    case 24:
      targa_decode_rgb(istream, *image, flip);
      break;
    case 32:
      targa_decode_rgba(istream, *image, flip);
      break;
    default:
      rError() << "LoadTGA: illegal pixel_size '" << targa_header.pixel_size << "'\n";
      return RGBAImagePtr();
    }
  }
  else if (targa_header.image_type == 10)
  {
    switch (targa_header.pixel_size)
    {
    case 24:
      targa_decode_rle_rgb(istream, *image, flip);
      break;
    case 32:
      targa_decode_rle_rgba(istream, *image, flip);
      break;
    default:
      rError() << "LoadTGA: illegal pixel_size '" << targa_header.pixel_size << "'\n";
      return RGBAImagePtr();
    }
  }

  return image;
}

const unsigned int TGA_FLIP_HORIZONTAL = 0x10;
const unsigned int TGA_FLIP_VERTICAL = 0x20;