Qt3D C++Read FBO

Reply to Qt3D C++Read FBO on Thu, 19 Apr 2018 08:48:44 GMT

jimfar — Thu, 19 Apr 2018 08:48:44 GMT

who could told me how to read the fragment shader mutilply outputs?Many thanks

Reply to Qt3D C++Read FBO on Thu, 19 Apr 2018 01:57:15 GMT

jimfar — Thu, 19 Apr 2018 01:57:15 GMT

class MyShaderCapture : public QObject
{
Q_OBJECT
public:
MyShaderCapture(Qt3DRender::QRenderCapture* capture, QLabel imageLabel)
: m_capture(capture)
, m_reply(nullptr)
, m_imageLabel(imageLabel)
, m_continuous(false)
{
}
public slots:
void onCompleted()
{
QObject::disconnect(connection);
emit sg2handleshaderreply( m_reply->image() );
//m_imageLabel->setPixmap();
//m_reply->saveImage("capture.bmp");
delete m_reply;
m_reply = nullptr;
if (m_continuous)
capture();
}
void setContinuous(bool continuos)
{
m_continuous = continuos;
}
void capture()
{
if (!m_reply) {
m_reply = m_capture->requestCapture();
connection = QObject::connect(m_reply, &Qt3DRender::QRenderCaptureReply::completed,
this, &MyShaderCapture::onCompleted);
}
}
signals:
void sg2handleshaderreply(QImage&img);
private:
Qt3DRender::QRenderCapture m_capture;
Qt3DRender::QRenderCaptureReply *m_reply;
QMetaObject::Connection connection;
QLabel *m_imageLabel;
bool m_continuous;
};
hope help others for this func

Reply to Qt3D C++Read FBO on Thu, 19 Apr 2018 01:56:36 GMT

jimfar — Thu, 19 Apr 2018 01:56:36 GMT

ok make it. i found a way
Qt3DExtras::Qt3DWindow m_window;
auto m_3drender = new Qt3DExtras::QForwardRenderer;
auto capture = new Qt3DRender::QRenderCapture;
m_3drender->setParent(capture);
m_window.setActiveFrameGraph(capture);
auto m_shadercapture = new MyShaderCapture(capture, NULL);