bkcolor canvas clipBox clipBox0 ctx ctxused drawColors GiGraphicsImpl GiGraphicsImpl isPrint lastZoomTimes maxPenWidth minPenWidth needFreeXf operator= phase rectDraw rectDrawM rectDrawMaxM rectDrawMaxW rectDrawW stopping xform zoomChanged ~GiGraphicsImpl

lastZoomTimes long GiGraphicsImpl::lastZoomTimes 记下的放缩结果改变次数