Upgrade saved drawings to the current document shape. Accepts a 1.9.x
Drawing[] or a DrawingsDocument. Every field is validated, the
1.9.x text keys are lifted out of the style bag into text, bare level
ratios become coloured levels, and array order is kept. An entry that could
never be rendered is dropped; anything unparseable yields an empty document
rather than an error.
Upgrade saved drawings to the current document shape. Accepts a 1.9.x
Drawing[]or a DrawingsDocument. Every field is validated, the 1.9.x text keys are lifted out of the style bag intotext, bare level ratios become coloured levels, and array order is kept. An entry that could never be rendered is dropped; anything unparseable yields an empty document rather than an error.