Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 50 0+0+750] [0+0+0 50 0+0+0] [BFC] children: not-inline
    Box <body> at [0,0] [0+0+0 50 0+0+0] [0+0+0 50 0+0+0] [GFC] children: not-inline
      Box <div> at [0,0] [0+0+0 50 0+0+0] [0+0+0 50 0+0+0] [GFC] children: not-inline
        ImageBox <img> at [0,0] [0+0+0 50 0+0+0] [0+0+0 50 0+0+0] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 50x50]
    PaintableBox (Box<BODY>) [0,0 50x50]
      PaintableBox (Box<DIV>) [0,0 50x50]
        ImagePaintable (ImageBox<IMG>) [0,0 50x50]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 50x50] [children: 0] (z-index: auto)
