Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x136 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x120 children: inline
      frag 0 from ImageBox start: 0, length: 0, rect: [8,8 120x120] baseline: 120
      ImageBox <input> at (8,8) content-size 120x120 inline-block children: not-inline
        BlockContainer <(anonymous)> at (8,8) content-size 784x0 flex-container(column) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (8,8) content-size 0x0 [BFC] children: not-inline
      TextNode <#text>
      TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x136]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x120]
      ImagePaintable (ImageBox<INPUT>) [8,8 120x120]
        PaintableWithLines (BlockContainer(anonymous)) [8,8 784x0]
          PaintableWithLines (BlockContainer(anonymous)) [8,8 0x0]
