Ipicture读JPG GIF都可以.txt

void  CImageshopView::OnDraw(CDC *  pDC) // kqy5
{
    CImageshopDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    IPicture *pPic;
    IStream *pStm;
    
    CFileStatus fstatus;
    CFile file;
    LONG cb;
    
    if (file.Open("c:/test.jpg",CFile::modeRead)&&file.GetStatus("c:/test.jpg", 
        fstatus)&&
        ((cb = fstatus.m_size) != -1))
    {
        HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
        LPVOID pvData = NULL;
        if (hGlobal != NULL)
        {
            if ((pvData = GlobalLock(hGlobal)) != NULL)
            {
                file.ReadHuge(pvData, cb);
                GlobalUnlock(hGlobal);
                CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
                
                if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,(LPVOID*
                    )&pPic)))
                {
                    OLE_XSIZE_HIMETRIC hmWidth;
                    OLE_YSIZE_HIMETRIC hmHeight;
                    
                    pPic->get_Width(&hmWidth);
                    pPic->get_Height(&hmHeight);
                    
                    double fX,fY;
                    fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/((double)pDC->GetDeviceCaps(HORZSIZE)*100.0);
                    fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/((double)pDC->GetDeviceCaps(VERTSIZE)*100.0);
                    if(FAILED(pPic->Render(*pDC,0,0,(DWORD)fX,(DWORD)fY,0,hmHeight,hmWidth,-hmHeight,NULL)))
                        AfxMessageBox("Failed To Render The picture!");
                    pPic->Release();
                }
                else
                    AfxMessageBox("Error Loading Picture From Stream!");
            }
        }
    }
    else
        AfxMessageBox("Can't Open Image File!");
}