Function lodepng::encode32_file

pub fn encode32_file<PixelType: Copy, P: AsRef<Path>>(filepath: P,
                                                      image: &[PixelType],
                                                      w: usize,
                                                      h: usize)
                                                      -> Result<(), Error>

Same as encode_file, but always encodes from 32-bit RGBA raw image