Method ReduceDepth

MSAAFilter/MeshRenderer.cpp:184–270

}

void MeshRenderer::ReduceDepth(ID3D11DeviceContext* context, DepthStencilBuffer& depthBuffer,
                                const Camera& camera)
{
    PIXEvent event(L"Depth Reduction");

    reductionConstants.Data.Projection = Float4x4::Transpose(camera.ProjectionMatrix());
    reductionConstants.Data.NearClip = camera.NearClip();
    reductionConstants.Data.FarClip = camera.FarClip();
    reductionConstants.Data.TextureSize.x = depthBuffer.Width;
    reductionConstants.Data.TextureSize.y = depthBuffer.Height;
    reductionConstants.Data.NumSamples = depthBuffer.MultiSamples;
    reductionConstants.ApplyChanges(context);
    reductionConstants.SetCS(context, 0);

    ID3D11RenderTargetView* rtvs[1] = { NULL };
    context->OMSetRenderTargets(1, rtvs, NULL);

    ID3D11UnorderedAccessView* uavs[1] = { depthReductionTargets[0].UAView };
    context->CSSetUnorderedAccessViews(0, 1, uavs, NULL);

    ID3D11ShaderResourceView* srvs[1] = { depthBuffer.SRView };
    context->CSSetShaderResources(0, 1, srvs);

    const bool msaa = depthBuffer.MultiSamples > 1;

    ID3D11ComputeShader* shader = depthReductionInitialCS[msaa ? 1 : 0];
    context->CSSetShader(shader, NULL, 0);

    uint32 dispatchX = depthReductionTargets[0].Width;
    uint32 dispatchY = depthReductionTargets[0].Height;
    context->Dispatch(dispatchX, dispatchY, 1);

    uavs[0] = NULL;
    context->CSSetUnorderedAccessViews(0, 1, uavs, NULL);

    srvs[0] = NULL;
    context->CSSetShaderResources(0, 1, srvs);

    context->CSSetShader(depthReductionCS, NULL, 0);

    for(uint32 i = 1; i < depthReductionTargets.size(); ++i)
    {
        RenderTarget2D& srcTexture = depthReductionTargets[i - 1];
        reductionConstants.Data.TextureSize.x = srcTexture.Width;
        reductionConstants.Data.TextureSize.y = srcTexture.Height;
        reductionConstants.Data.NumSamples = srcTexture.MultiSamples;
        reductionConstants.ApplyChanges(context);

        uavs[0] = depthReductionTargets[i].UAView;
        context->CSSetUnorderedAccessViews(0, 1, uavs, NULL);

        srvs[0] = srcTexture.SRView;
        context->CSSetShaderResources(0, 1, srvs);

        dispatchX = depthReductionTargets[i].Width;
        dispatchY = depthReductionTargets[i].Height;
        context->Dispatch(dispatchX, dispatchY, 1);