Method parse

source/MRIOExtras/MRSvg.cpp:389–407

    std::string error() const { return doc_.ErrorStr(); }

    Expected<Polyline2> parse()
    {
        auto* svg = doc_.RootElement();
        if ( !svg || svg->Name() != std::string_view{ "svg" } )
            return unexpected( "Not an SVG document" );

        if ( auto contours = parseChildren_( svg ) )
        {
            Polyline2 result{ *contours };
            // flip Y axis
            for ( auto& p : result.points )
                p.y *= -1.f;
            return result;
        }
        else
        {
            return unexpected( std::move( contours.error() ) );
        }
    }

private:
    Expected<Contours2f> parseChildren_( XMLElement* group ) const