#@ignore-def

    #@input :: String SVG, slurped
    #@output :: String SVG

    ## `debug` doesnt work in gojq
    #      debug(
    #        {
    #          $relSize,$x,
    #          $y,
    #        }) |

    def viewBox:
      [
        $relSize*$x,
        $relSize*$y,
        $viewBoxTile,
        $viewBoxTile
      ]
      | map(tostring)
      | join(" ")
    ;

    # TODO use precompiled with svgson

    def fixViewBox($baseSize; $relSize; $x; $y; $zoom; $viewBoxTile):
      #      #minX="$(calc $relSize*$x)"
      #      #minY="$(calc $relSize*$y)"
      #      #viewBox="$minX $minY $viewBoxTile $viewBoxTile" # TODO mohol som to vypocitat v jq
      #
      #      ($relSize*$x) as $minX |
      #      ($relSize*$y) as $minY |
      #      "\($minX) \($minY) \($viewBoxTile) \($viewBoxTile)" as $viewBox |

      viewBox as $viewBox |

      sub("height=\"([^/\"]+)\"";"height=\($baseSize|tostring|tojson)") |
      sub("width=\"([^/\"]+)\"";"width=\($baseSize|tostring|tojson)") |
      sub("viewBox=\"([^/\"]+)\"";"viewBox=\($viewBox|tojson)") |
      #gsub("";"") |
      #gsub("";"") |
      .
    ;


    #    split("<g ") |
    #    .[0] |= fixViewBox($baseSize; $relSize; $x; $y; $zoom; $viewBoxTile) |
    #    join("<g ")

    # the `<svg>` element needs to be patched. its located before the first `<g >` element.
    index("<g ") as $x |
    [
      .[0:4],
      (.[4:$x]|fixViewBox($baseSize; $relSize; $x; $y; $zoom; $viewBoxTile)),
      .[$x:]
    ] |
    join("")