_callback _container _fillColor _lineColor _path beginPath beginShape bezierTo checkNeedFire clearRect clipPath clipRect closePath drawBitmap drawEllipse drawHandle drawLine drawPath drawRect drawTextAt endOutput endShape fireLastPath GiShapeAdapter hasFillColor hasLineColor lineTo moveTo quadTo restoreClip saveClip setBrush setPen

quadTo() void GiShapeAdapter::quadTo ( float  cpx, float  cpy, float  x, float  y  ) virtual Add a quadratic bezier segment to the current subpath. 实现了 GiCanvas.