call_onobj( $renderer,
    [ 'UseFont', 0 ],
    [ 'SetDots', 52 ],
    [ 'SetScanLines', 300 ],
    [ 'AdjustDots', 15 ],
    [ 'AdjustScanLines', 2 ],
    [ 'Text', 'This is some text to be added to the output ] );