Method RenderResolve

BindlessDeferred/BindlessDeferred.cpp:1929–1966

Performs MSAA resolve with a full-screen pixel shader

// Performs MSAA resolve with a full-screen pixel shader
void BindlessDeferred::RenderResolve()
{
    if(AppSettings::MSAAMode == MSAAModes::MSAANone)
        return;

    ID3D12GraphicsCommandList* cmdList = DX12::CmdList;

    PIXMarker pixMarker(cmdList, "MSAA Resolve");
    ProfileBlock profileBlock(cmdList, "MSAA Resolve");

    resolveTarget.MakeWritable(cmdList);

    D3D12_CPU_DESCRIPTOR_HANDLE rtvs[1] = { resolveTarget.RTV.CPUHandle };
    cmdList->OMSetRenderTargets(ArraySize_(rtvs), rtvs, false, nullptr);
    DX12::SetViewport(cmdList, resolveTarget.Width(), resolveTarget.Height());

    const uint64 deferred = AppSettings::RenderMode == RenderModes::DeferredTexturing ? 1 : 0;
    ID3D12PipelineState* pso = resolvePSOs[deferred];

    cmdList->SetGraphicsRootSignature(resolveRootSignature);
    cmdList->SetPipelineState(pso);

    cmdList->SetGraphicsRoot32BitConstant(0, uint32(mainTarget.Width()), 0);
    cmdList->SetGraphicsRoot32BitConstant(0, uint32(mainTarget.Height()), 1);

    AppSettings::BindCBufferGfx(cmdList, 1);

    D3D12_CPU_DESCRIPTOR_HANDLE srvs[1] = { deferred ? deferredMSAATarget.SRV() : mainTarget.SRV() };
    DX12::BindShaderResources(cmdList, 2, ArraySize_(srvs), srvs);

    cmdList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
    cmdList->IASetIndexBuffer(nullptr);
    cmdList->IASetVertexBuffers(0, 0, nullptr);

    cmdList->DrawInstanced(3, 1, 0, 0);

    resolveTarget.MakeReadable(cmdList);
}

// Runs a simple compute shader that reads depth + tangent from for a particular pixel, and copies
// the results to a readback buffer that's used to generate the "cursor" decal