Function heif_context_add_image_tile 

pub unsafe extern "C" fn heif_context_add_image_tile(
    ctx: *mut heif_context,
    tiled_image: *mut heif_image_handle,
    tile_x: u32,
    tile_y: u32,
    image: *const heif_image,
    encoder: *mut heif_encoder,
) -> heif_error