BLOB类型二进制数据转换成Bitmap类型数据，并显示成缩略图，类似手机相册的封面

class DemoDuilib : public WindowImplBase, public CButtonUI
{
public:
    DemoDuilib();
    ~DemoDuilib(); 
    void test();
    static std::vector<uint8_t> thumbData;//存储BLOB类型二进制数据
private:
    void PaintStatusImage(HDC hDC) override;//保持纵横比并裁剪
    HBITMAP CreateHBITMAPFromMemory(const std::vector<uint8_t>& data);//BLOB类型二进制数据转换成Bitmap类型数据
)
void test(){
        DemoDuilib* pButton = new DemoDuilib();
        CDuiString strName;
        strName.Format(_T("btn_square_%d"), i + 1);
        pButton->SetName(strName);
        pButton->SetFixedHeight(BUTTONSIZE);//const int BUTTONSIZE = 85;
        pButton->SetFixedWidth(BUTTONSIZE);
        HBITMAP hBitmap = CreateHBITMAPFromMemory(thumbData);
        if (hBitmap)
        {
            pButton->SetNormalImage(hBitmap);
        }
        pButton->SetPadding(CDuiRect(10,0,0,0));
        pButtonLayout->Add(pButton);
}

void DemoDuilib::PaintStatusImage(HDC hDC)
{
    if (m_hNormalBitmap)
    {
        HDC hMemDC = CreateCompatibleDC(hDC);
        HBITMAP hOldBitmap = (HBITMAP)SelectObject(hMemDC, m_hNormalBitmap);
        BITMAP bitmap;
        GetObject(m_hNormalBitmap, sizeof(bitmap), &bitmap);
        
        float aspectRatio = static_cast<float>(bitmap.bmWidth) / bitmap.bmHeight;
        int targetWidth = m_rcItem.right - m_rcItem.left;
        int targetHeight = m_rcItem.bottom - m_rcItem.top;
        int newWidth, newHeight;
        if (aspectRatio > 1.0f) {
            newWidth = targetWidth;
            newHeight = static_cast<int>(targetWidth / aspectRatio);
        } else {
            newHeight = targetHeight;
            newWidth = static_cast<int>(targetHeight * aspectRatio);
        }
        int offsetX = (targetWidth - newWidth) / 2;
        int offsetY = (targetHeight - newHeight) / 2;
        StretchBlt(hDC, m_rcItem.left, m_rcItem.top, targetWidth, targetHeight,
                   hMemDC, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
        SelectObject(hMemDC, hOldBitmap);
        DeleteDC(hMemDC);
    } else {
        CButtonUI::PaintStatusImage(hDC);
    }
}

HBITMAP DemoDuilib::CreateHBITMAPFromMemory(const std::vector<uint8_t>& data)
{
    HBITMAP hBitmap = NULL;
    Gdiplus::GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR gdiplusToken;
    Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
    IStream* pStream = SHCreateMemStream(data.data(), data.size());
    if (pStream)
    {
        Gdiplus::Bitmap* pBitmap = Gdiplus::Bitmap::FromStream(pStream);
        if (pBitmap)
        {
            pBitmap->GetHBITMAP(Gdiplus::Color(0, 0, 0), &hBitmap);
            delete pBitmap;
        }
        pStream->Release();
    }
    Gdiplus::GdiplusShutdown(gdiplusToken);
    return hBitmap;
}