signwritingBox function
Recomputes a sign's bottom-right box corner (maxX, maxY) from its symbols'
rendered sizes — the tight box used when trustBox is off.
Mirrors Python signwriting.visualizer.visualize.signwriting_box.
Implementation
Tuple2<int, int> signwritingBox(Sign sign) {
int maxX = 0;
int maxY = 0;
for (final symbol in sign.symbols) {
final size = getSymbolSize(symbol.symbol);
maxX = max(maxX, symbol.position.item1 + size.item1);
maxY = max(maxY, symbol.position.item2 + size.item2);
}
return Tuple2(maxX, maxY);
}