JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_graphicapi_InternalDirectXApi_createDirectXOffscreenDevice()

in skiko/src/awtMain/cpp/windows/InternalDirectXApi.cc [189:260]

• 59 lines of code
• 11 McCabe index (conditional complexity)

    JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_graphicapi_InternalDirectXApi_createDirectXOffscreenDevice(
        JNIEnv *env, jobject redrawer, jlong adapterPtr) {

        gr_cp<IDXGIFactory4> deviceFactory;
        if (!SUCCEEDED(CreateDXGIFactory1(IID_PPV_ARGS(&deviceFactory)))) {
            return 0;
        }
        if (adapterPtr == 0) {
            return 0;
        }
        gr_cp<IDXGIAdapter1> adapter((IDXGIAdapter1 *) adapterPtr);

        D3D_FEATURE_LEVEL maxSupportedFeatureLevel = D3D_FEATURE_LEVEL_12_0;
        D3D_FEATURE_LEVEL featureLevels[] = {
            D3D_FEATURE_LEVEL_12_1,
            D3D_FEATURE_LEVEL_12_0
        };

        for (int i = 0; i < _countof(featureLevels); i++) {
            if (SUCCEEDED(D3D12CreateDevice(adapter.get(), featureLevels[i], _uuidof(ID3D12Device), nullptr))) {
                maxSupportedFeatureLevel = featureLevels[i];
                break;
            }
        }

        gr_cp<ID3D12Device> device;
        if (!SUCCEEDED(D3D12CreateDevice(adapter.get(), maxSupportedFeatureLevel, IID_PPV_ARGS(&device)))) {
            return 0;
        }

        // Create the command queue
        gr_cp<ID3D12CommandQueue> queue;
        D3D12_COMMAND_QUEUE_DESC queueDesc = {};
        queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE;
        queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT;

        if (!SUCCEEDED(device->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&queue)))) {
            return 0;
        }

        ID3D12CommandAllocator* commandAllocator;
        if (!SUCCEEDED(device->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&commandAllocator)))) {
            return 0;
        }

        ID3D12GraphicsCommandList* commandList;
        if (!SUCCEEDED(device->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, commandAllocator, nullptr, IID_PPV_ARGS(&commandList)))) {
            return 0;
        }

        ID3D12Fence* fence;
        if (!SUCCEEDED(device->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&fence)))) {
            return 0;
        }

        HANDLE fenceEvent = CreateEventEx(nullptr, false, false, EVENT_ALL_ACCESS);
        if (!fenceEvent) {
            return 0;
        }

        DirectXOffscreenDevice *d3dDevice = new DirectXOffscreenDevice();
        d3dDevice->commandAllocator = commandAllocator;
        d3dDevice->commandList = commandList;
        d3dDevice->fence = fence;
        d3dDevice->fenceEvent = fenceEvent;
        d3dDevice->backendContext.fAdapter = adapter;
        d3dDevice->backendContext.fDevice = device;
        d3dDevice->backendContext.fQueue = queue;
        d3dDevice->backendContext.fProtectedContext = GrProtected::kNo;

        return toJavaPointer(d3dDevice);
    }