Function lodepng_can_have_alpha

src/lodepng.cpp:2637–2642

}

unsigned lodepng_can_have_alpha(const LodePNGColorMode* info)
{
  return info->key_defined
      || lodepng_is_alpha_type(info)
      || lodepng_has_palette_alpha(info);
}

size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color)
{