[Development] QRhi - how to not clear depth/stencil buffer

[Harald Vistnes]

Hi,

I am developing a multi-pass rendering algorithm using QRhi.

In the first pass I create one render target and a depth/stencil buffer. In
the second pass I create another render target, but I reuse the
depth/stencil buffer from the first pass.

However, the depth/stencil buffer is cleared when I start the second pass
in the call to

    void QRhiCommandBuffer::beginPass(QRhiRenderTarget *rt,
                   const QColor &colorClearValue,
                   const QRhiDepthStencilClearValue &depthStencilClearValue,
                   QRhiResourceUpdateBatch *resourceUpdates = nullptr,
                   BeginPassFlags flags = {});

Is there some trick to not having to clear the render target and/or
depth/stencil buffer at the start of a pass?

Best wishes,
Harald
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