JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_Direct3DRedrawer_createDirectXDevice()

in skiko/src/awtMain/cpp/windows/directXRedrawer.cc [304:361]

• 47 lines of code
• 8 McCabe index (conditional complexity)

    JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_Direct3DRedrawer_createDirectXDevice(
        JNIEnv *env, jobject redrawer, jlong adapterPtr, jlong contentHandle, jboolean transparency) {
        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[] = {
            // TODO add D3D_FEATURE_LEVEL_12_2
            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;
        }

        HWND hWnd = fromJavaPointer<HWND>(contentHandle);
        DirectXDevice *d3dDevice = new DirectXDevice();
        d3dDevice->backendContext.fAdapter = adapter;
        d3dDevice->backendContext.fDevice = device;
        d3dDevice->backendContext.fQueue = queue;
        d3dDevice->backendContext.fProtectedContext = GrProtected::kNo;

        d3dDevice->device = device;
        d3dDevice->queue = queue;
        d3dDevice->hWnd = hWnd;

        if (transparency) {
            const LONG style = GetWindowLong(hWnd, GWL_EXSTYLE);
            SetWindowLong(hWnd, GWL_EXSTYLE, style | WS_EX_TRANSPARENT);
        }

        return toJavaPointer(d3dDevice);
    }