Qt3D use default depth buffer in a QRenderTarget

[unclejimbo 0]

Hi all,
Can I reuse the default depth-stencil buffer in a new QRenderTarget? There seems no way to tell a QRenderTargetOutput to use the default draw buffer rather than a QTexture.
And I've also tried to use QBlitFramebuffer to blit a depth texture from the default back buffer w/o success. I used RenderDoc to trace the frame and it tells that the COLOR_0 attachment is blitted rather than the DEPTH_STENCIL attachment which I've specified. Here's my code,

    auto blit = new Qt3DRender::QBlitFramebuffer(parent);
    blit->setSource(nullptr);
    blit->setSourceAttachmentPoint(Qt3DRender::QRenderTargetOutput::DepthStencil);
    blit->setSourceRect(QRectF(0, 0, m_size.width(), m_size.height()));
    blit->setDestination(m_renderTarget);
    blit->setDestinationAttachmentPoint(Qt3DRender::QRenderTargetOutput::DepthStencil);
    blit->setDestinationRect(QRectF(0, 0, m_size.width(), m_size.height()));
    new Qt3DRender::QNoDraw(blit);