// text since we otherwise would overwrite the text.
$g->InitFrame();
// Create a new scale
$scale = new CanvasScale($g);
$scale->Set(0, $xmax, 0, $ymax);
// The shape class is wrapper around the Imgae class which translates
// the coordinates for us
$shape = new Shape($g, $scale);
$shape->SetColor('black');
// Add a black line
$shape->SetColor('black');
$shape->Line(0, 0, 20, 20);
// .. and a circle (x,y,diameter)
$shape->Circle(5, 14, 2);
// .. and a filled circle (x,y,diameter)
$shape->SetColor('red');
$shape->FilledCircle(11, 8, 3);
// .. add a rectangle
$shape->SetColor('green');
$shape->FilledRectangle(15, 8, 19, 14);
// .. add a filled rounded rectangle
$shape->SetColor('green');
$shape->FilledRoundedRectangle(2, 3, 8, 6);
// .. with a darker border
$shape->SetColor('darkgreen');
$shape->RoundedRectangle(2, 3, 8, 6);
// Stroke the graph
$g->Stroke();
?>