pub fn write_prim_blocks(
builder: &mut GpuBufferBuilderImpl<GpuBufferBlockF>,
prim_rect: LayoutRect,
clip_rect: LayoutRect,
pattern_base_color: ColorF,
pattern_texture_input: RenderTaskId,
segments: &[QuadSegment],
scale_offset: ScaleOffset,
) -> GpuBufferAddress