Function ShowSplash

ogsr_engine/xr_3da/splash.cpp:63–163

static HWND logoOwnerWindow = nullptr;

void ShowSplash(HINSTANCE hInstance)
{
    WNDCLASS wc = {0};
    wc.lpfnWndProc = DefWindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
    wc.lpszClassName = c_szSplashClass;
    RegisterClass(&wc);

    // image
    CImage img; // объект изображения

    CHAR path[MAX_PATH];

    GetModuleFileName(nullptr, path, MAX_PATH);

    std::string splash_path{path};
    splash_path = splash_path.erase(splash_path.find_last_of('\\'), splash_path.size() - 1);
    splash_path += "\\splash.png";

    HRESULT hr = img.Load(splash_path.c_str()); // загрузка сплеша

    if (FAILED(hr) || img.IsNull()) // если картинки нет на диске, то грузим из ресурсов
    {
        img.Destroy();
        if (IStream* pStream = CreateStreamOnResource(MAKEINTRESOURCE(IDB_PNG1), TEXT("PNG")))
        {
            img.Load(pStream);
            pStream->Release();
        }
    }

    // фиксируем ширину картинки
    // фиксируем высоту картинки
    const int splashWidth = img.GetWidth();
    const int splashHeight = img.GetHeight();

    const HWND hwndOwner = CreateWindow(c_szSplashClass, NULL, WS_POPUP, 0, 0, 0, 0, NULL, NULL, hInstance, NULL);
    const HWND hWnd = CreateWindowEx(WS_EX_LAYERED, c_szSplashClass, nullptr, WS_POPUP, 0, 0, 0, 0, hwndOwner, nullptr, hInstance, nullptr);

    if (!hWnd)
        return;

    const HDC hdcScreen = GetDC(nullptr);
    const HDC hDC = CreateCompatibleDC(hdcScreen);

    HBITMAP hBmp = CreateCompatibleBitmap(hdcScreen, splashWidth, splashHeight);
    const HBITMAP hbmpOld = (HBITMAP)SelectObject(hDC, hBmp);

    // рисуем картиночку
    for (int i = 0; i < img.GetWidth(); i++)
    {
        for (int j = 0; j < img.GetHeight(); j++)
        {
            BYTE* ptr = (BYTE*)img.GetPixelAddress(i, j);
            ptr[0] = ((ptr[0] * ptr[3]) + 127) / 255;
            ptr[1] = ((ptr[1] * ptr[3]) + 127) / 255;
            ptr[2] = ((ptr[2] * ptr[3]) + 127) / 255;