code: func PopClip() {
  	if len(canvas.clipStack) == 0 {
  		return
  	}
  	c := canvas.clipStack[len(canvas.clipStack)-1]
  	canvas.clipStack = canvas.clipStack[:len(canvas.clipStack)-1]
  	SetClipRect(c.x, c.y, c.w, c.h)
  }
docs: // PopClip restores saved with PushClip clipping window