问亲爱的IMGUI和DirectX 12覆盖(DXGI_ERROR_INVALID_CALL)

EN

//iterate frame
Frame_Number = Frame_Number + 1;

//Get Device, using IDXGISwapChain3
ID3D12Device* device;
HRESULT gd = pSwapChain->GetDevice(__uuidof(ID3D12Device), (void**)&device);
assert(gd == S_OK);

//Get window handle from swapchain for IMGUI
DXGI_SWAP_CHAIN_DESC sd;
pSwapChain->GetDesc(&sd);
window = sd.OutputWindow;

//Get backbuffers
buffersCounts = sd.BufferCount;
frameContext = new FrameContext[buffersCounts];

D3D12_DESCRIPTOR_HEAP_DESC descriptorImGuiRender = {};
descriptorImGuiRender.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
descriptorImGuiRender.NumDescriptors = buffersCounts;
descriptorImGuiRender.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;

// Create Descriptor Heap IMGUI render
if (device->CreateDescriptorHeap(&descriptorImGuiRender, IID_PPV_ARGS(&d3d12DescriptorHeapImGuiRender)) != S_OK)
    return false;

//Create Command Allocator
ID3D12CommandAllocator* allocator;
if (device->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&allocator)) != S_OK)
    return false;

for (size_t i = 0; i < buffersCounts; i++) {
    frameContext[i].commandAllocator = allocator;
}

if (device->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, allocator, NULL, IID_PPV_ARGS(&d3d12CommandList)) != S_OK ||
    d3d12CommandList->Close() != S_OK)
    return false;

//create descriptor heap, describe and create a render target view (RTV) descriptor heap.
D3D12_DESCRIPTOR_HEAP_DESC descriptorBackBuffers;
descriptorBackBuffers.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
descriptorBackBuffers.NumDescriptors = buffersCounts;
descriptorBackBuffers.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
descriptorBackBuffers.NodeMask = 1;

if (device->CreateDescriptorHeap(&descriptorBackBuffers, IID_PPV_ARGS(&d3d12DescriptorHeapBackBuffers)) != S_OK)
    return false;
const auto rtvDescriptorSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);

// Create frame resources.
D3D12_CPU_DESCRIPTOR_HANDLE rtvHandle = d3d12DescriptorHeapBackBuffers->GetCPUDescriptorHandleForHeapStart();

// Create a RTV for each frame.
for (size_t i = 0; i < buffersCounts; i++) {
    ID3D12Resource* pBackBuffer = nullptr;

    frameContext[i].main_render_target_descriptor = rtvHandle;
    pSwapChain->GetBuffer(i, IID_PPV_ARGS(&pBackBuffer));
    device->CreateRenderTargetView(pBackBuffer, nullptr, rtvHandle);
    frameContext[i].main_render_target_resource = pBackBuffer;
    rtvHandle.ptr += rtvDescriptorSize;
}

// Setup Platform/Renderer bindings dor IMGUI
ImGui_ImplWin32_Init(window);
ImGui_ImplDX12_Init(device, buffersCounts,
    DXGI_FORMAT_R8G8B8A8_UNORM, d3d12DescriptorHeapImGuiRender,
    d3d12DescriptorHeapImGuiRender->GetCPUDescriptorHandleForHeapStart(),
    d3d12DescriptorHeapImGuiRender->GetGPUDescriptorHandleForHeapStart());
ImGui::GetIO().ImeWindowHandle = window;

// Start the Dear ImGui frame
ImGui_ImplDX12_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();

//call imgui menues here
bool bShow = true;
ShowExampleAppSimpleOverlay(&bShow);

// Rendering (imgui)
FrameContext& currentFrameContext = frameContext[pSwapChain->GetCurrentBackBufferIndex()];
currentFrameContext.commandAllocator->Reset();

D3D12_RESOURCE_BARRIER barrier;
barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
barrier.Transition.pResource = currentFrameContext.main_render_target_resource;
barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_PRESENT;
barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_RENDER_TARGET;

d3d12CommandList->Reset(currentFrameContext.commandAllocator, nullptr);
d3d12CommandList->ResourceBarrier(1, &barrier);
d3d12CommandList->OMSetRenderTargets(1, &currentFrameContext.main_render_target_descriptor, FALSE, nullptr);

d3d12CommandList->SetDescriptorHeaps(1, &d3d12DescriptorHeapImGuiRender);

ImGui::Render();
ImGui_ImplDX12_RenderDrawData(ImGui::GetDrawData(), d3d12CommandList);

barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_RENDER_TARGET;
barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_PRESENT;

d3d12CommandList->ResourceBarrier(1, &barrier);
d3d12CommandList->Close();

d3d12CommandQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*)&d3d12CommandList);