JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_Direct3DRedrawer_chooseAdapter()

in skiko/src/awtMain/cpp/windows/directXRedrawer.cc [274:302]

• 26 lines of code
• 7 McCabe index (conditional complexity)

    JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_Direct3DRedrawer_chooseAdapter(
            JNIEnv *env, jobject redrawer, jint adapterPriority) {
        gr_cp<IDXGIFactory4> deviceFactory;
        if (!SUCCEEDED(CreateDXGIFactory1(IID_PPV_ARGS(&deviceFactory)))) {
            return 0;
        }

        gr_cp<IDXGIFactory6> factory6;
        if (!SUCCEEDED(deviceFactory->QueryInterface(IID_PPV_ARGS(&factory6)))) {
            return 0;
        }

        for (UINT adapterIndex = 0;; ++adapterIndex) {
            IDXGIAdapter1 *adapter = nullptr;
            if (!SUCCEEDED(factory6->EnumAdapterByGpuPreference(adapterIndex, (DXGI_GPU_PREFERENCE) adapterPriority, IID_PPV_ARGS(&adapter)))) {
                break;
            }
            if (
                SUCCEEDED(D3D12CreateDevice(adapter, D3D_FEATURE_LEVEL_11_0, _uuidof(ID3D12Device), nullptr)) &&
                isAdapterSupported(env, redrawer, adapter)
            ) {
                return toJavaPointer(adapter);
            } else {
                adapter->Release();
            }
        }

        return 0;
    }