Qt+opengl,开启抗锯齿

MyOpenglWidget::MyOpenglWidget(QWidget *parent)
    : QOpenGLWidget{parent}
{

    auto &mysignal =  MySignal::instance();
    // 绘制和清空
    connect(&mysignal,&MySignal::drawSignal,this,[&](Shape shape){
        drawShape(shape);
    });
    // 设置渲染模式（线段、或者面填充）
    connect(&mysignal,&MySignal::renderModeSignal,this,[&](renderMode mode){
        makeCurrent();
        if(mode == renderMode::Fill)
        {
           glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
        }
        else
        {
            glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
        }

        doneCurrent();
        update();update();
    });
// 写到构造函数里
    // 开启抗锯齿
    QSurfaceFormat surfaceFormat;
    surfaceFormat.setSamples(5);//多重采样
    setFormat(surfaceFormat); //setFormat是QOpenGLWidget的函数
}