root:
  items:
    - type: stacking-context
      bounds: [0, 0, 480, 80]
      raster-space: local(1.0)
      items:
      - text: "a Bcd Efgh Ijklm Nopqrs Tuvwxyz"
        origin: 20.5 50
        size: 20
        font: "FreeSans.ttf"
