Using Qt with DirectX?

问题:

What exactly are my options? I have programs I need to write in OpenGL and DirectX, and I'd like to use Qt for OpenGL, and not have to re-implement half my program for the DirectX components of my task.

I've looked on Google and I have found references to people complaining about Direct3D being a dependency of Qt, and people talking about implementing QD3DWidget sub-classing QWidget in a similar fashion to QGLWidget, yet nobody talked about how to implement it or where any examples are.

I need help. I want to know if it is possible? What would I need to do to get it working? Has it been done before?

回答1:

its pretty straightforward than I thought,

-> Create a QWidget
-> Override paintEngine() method, does nothing, just returns NULL
-> Assign HWND to widget->winId()

    #ifdef USE_QTGUI
        QApplication a(argc, argv);
        CD3DWidget wndw;    wndw.show();    wndw.resize(1280,960);
        hWnd = wndw.winId();
    #else
        hWnd = CreateAppWindow(name,300,300);
    #endif

       //CD3DWidget class contains only the following definitions
    CD3DWidget::CD3DWidget(QWidget * parent):QWidget(parent){      }
    QPaintEngine *CD3DWidget::paintEngine (){          return NULL;        }

Thanks,

CV

回答2:

List of changes:

Qt 4.6 introduces many new features and improvements as well as bugfixes over the 4.5.x series.

......................

• The experimental Direct3D paint engine has been removed. The reason for this is that Nokia focuses on OpenGL for desktop hardware accelerated rendering.

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回答3:

For all its worth, here is how to get Ogre3D's output to a Qt 4.5 window. Basically, you grab a rendering surface and you use it to render the output. This is a "Qt in D3D/OpenGL application approach".

Here are OpenGL examples with Qt 4.5 using OpenGL window.

If I understand it correctly, the Direct3D support is experimental and is only used for painting of windows.