其他ai已解决,修改 GRaphicsUtils._updateRenderTexture方法,

let diffX = width - (oriRT?.sourceWidth || 0);
let diffY = height - (oriRT?.sourceHeight || 0);
if (diffX > 0) vSize.x -= diffX * 0.5 / this._scaleX;
if (diffY > 0) vSize.y -= diffY * 0.5 / this._scaleY;
如果遇到相同问题的可以参考