beginPath beginShape bezierTo clearRect clipPath clipRect close closePath drawBitmap drawEllipse drawHandle drawLine drawPath drawRect drawTextAt endShape GiSvgCanvas im lineTo moveTo open quadTo restoreClip saveClip setBrush setPen ~GiSvgCanvas

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