如何在QGraphicsView中为QOpenGLWidget启用抗锯齿? [英] How to enable antialiasing for QOpenGLWidget in QGraphicsView?

问题描述

我已通过QGraphicsProxyWidget将QOpenGLWidget添加到QGraphicsView(不使用setviewport):

I have added QOpenGLWidget to QGraphicsView (don't use setviewport) via QGraphicsProxyWidget:

QSurfaceFormat format= QSurfaceFormat();
format->setSamples(4); //<== widget show black screen if samples =4, 1 is ok but not antialiasing
m_glWidget->setFormat(format);

MyGraphicsProxyWidget* proxy= new MyGraphicsProxyWidget();
proxy->setWidget(m_glWidget);
//add to scene
scene->addItem(proxy);

我尝试了一些方法，但是没有用: 如果样本= 4，但样本= 1没问题，则glwidget显示黑屏，但不能抗锯齿. 那么如何在QGraphicsView中为QOpenGLWidget(由GraphicsproxyWidget添加)启用抗锯齿呢?

I've tried some ways but not work: glwidget show black screen if samples =4, but samples = 1 is ok but not antialiasing. So how to enable antialiasing for QOpenGLWidget (added by GraphicsproxyWidget) in QGraphicsView?

有什么帮助吗?谢谢！

推荐答案

在qapplication初始化下，将代码追加到main.cpp之外

append beyond code to your main.cpp under qapplication initialization

QSurfaceFormat fmt;
fmt.setSamples(10); 
QSurfaceFormat::setDefaultFormat(fmt);

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