Function libheif_sys::heif_context_get_list_of_top_level_image_IDs

pub unsafe extern "C" fn heif_context_get_list_of_top_level_image_IDs(
    ctx: *mut heif_context,
    ID_array: *mut heif_item_id,
    count: c_int
) -> c_int

Fills in image IDs into the user-supplied int-array ‘ID_array’, preallocated with ‘count’ entries. Function returns the total number of IDs filled into the array.