SignatureMark Enum

enum SignatureMark {
    case strokes(strokes: [[StrokePoint]], width: Double, color: RgbColor)
    case picture(png: Data)
}

public record SignatureMark {
    public record Strokes(StrokePoint[][] strokes, double width, RgbColor color) : SignatureMark
    public record Picture(byte[] png) : SignatureMark
}

pub enum SignatureMark {
    Strokes { strokes: Vec<Vec<StrokePoint>>, width: f64, color: RgbColor },
    Picture { png: Vec<u8> },
}