fn add_composite_prim(
blend_mode: BlendMode,
prim_instance_index: PrimitiveInstanceIndex,
rect: &DeviceRect,
frame_state: &mut FrameBuildingState<'_>,
targets: &[CommandBufferIndex],
segments: &[QuadSegment],
)fn add_composite_prim(
blend_mode: BlendMode,
prim_instance_index: PrimitiveInstanceIndex,
rect: &DeviceRect,
frame_state: &mut FrameBuildingState<'_>,
targets: &[CommandBufferIndex],
segments: &[QuadSegment],
)