Function build_segments_if_needed 

fn build_segments_if_needed(
    instance: &mut PrimitiveInstance,
    prim_instance_index: PrimitiveInstanceIndex,
    prim_clip_chain: &ClipChainInstance,
    frame_state: &mut FrameBuildingState<'_>,
    prim_store: &mut PrimitiveStore,
    data_stores: &DataStores,
    scratch: &mut PrimitiveScratchBuffer,
)