Function prepare_quad 

pub fn prepare_quad(
    pattern_builder: &dyn PatternBuilder,
    local_rect: &LayoutRect,
    local_clip_rect: &LayoutRect,
    aligned_aa_edges: EdgeMask,
    transfomed_aa_edges: EdgeMask,
    prim_instance_index: PrimitiveInstanceIndex,
    cache_key: &Option<QuadCacheKey>,
    clip_chain: &ClipChainInstance,
    transform: &mut QuadTransformState,
    frame_context: &FrameBuildingContext<'_>,
    pic_context: &PictureContext,
    targets: &[CommandBufferIndex],
    interned_clips: &DataStore<ClipIntern>,
    frame_state: &mut FrameBuildingState<'_>,
    scratch: &mut PrimitiveScratchBuffer,
)