TextOut（）似乎没有展示代理UNICODE对

Question

我尝试使用H = 0xD835展示U + 1D400（代理对L = 0xDC00 TextOut()）无济于事。为什么？

  

案例WM_PAINT：

    PAINTSTRUCT ps;

    BeginPaint(hwnd, &ps);

    int iLogPixelsY;

    iLogPixelsY = GetDeviceCaps(ps.hdc, LOGPIXELSY);

    LOGFONT lf;

    int iPts;

    iPts = 11;

    memset(&lf, 0, sizeof(LOGFONT));
    lf.lfHeight = -iPts * iLogPixelsY / 72;
    lf.lfOutPrecision = OUT_TT_ONLY_PRECIS;
    wcscpy_s(lf.lfFaceName, L"Cambria Math");

    HFONT hFont;

    hFont = CreateFontIndirect(&lf);
    hFont = (HFONT)SelectObject(ps.hdc, hFont);

    wchar_t tx[2];

    tx[0] = 0xD835;
    tx[1] = 0xDC00;

    TextOut(ps.hdc, 10, 100, tx, 1); 

    DeleteObject(SelectObject(ps.hdc, hFont));

    EndPaint(hwnd, &ps);
    break;

Answer 1

您正在调用TextOut，指定字符串长度为1，但根据this documentation，您应该传递2，因为它是代理对。