VC/MFC加载图片（JPG、JPEG、BMP）

  //加载jpg图片
int m_TotCount;
CImageList m_ImageList;

CListCtrl m_List;
HIMAGELIST hScreens = ImageList_Create(THUMWIDTH, THUMHEIGHT, ILC_COLOR32, 0, 1);
m_ImageList.Attach(hScreens);

m_list.SetImageList(&m_ImageList, LVSIL_NORMAL);

for (int i = 0; i<4; i++ )
{
      CString ss;
      ss.Format("%d",i);
      HBITMAP bitm=LoadPicture( GetExeAbsolutePath()+ss+".jpg" );
      if (bitm!=NULL)
      {
            m_TotCount=m_list.GetItemCount();
            CBitmap*      pImage = NULL;     
            pImage = new CBitmap();           
            pImage->Attach(bitm);
            int imgP=m_ImageList.Add(pImage,RGB(0,0,0));
            m_list.InsertItem(m_TotCount,ss+".jpg",imgP);           
            m_list.SetItemText(m_TotCount, 1, ss+".jpg");
      }     
}

//加载Jpg、Bmp图片，这个函数是关键代码！！！！！！！
HBITMAP CAddbmpDlg::LoadPicture(CString mFile)
{
      CString pFSize;
      WCHAR wpath[MAX_PATH];
      MultiByteToWideChar(CP_ACP, 0, mFile, -1, wpath, MAX_PATH);
     
      IPicture* pPic;
      OleLoadPicturePath(wpath, NULL, NULL, NULL, IID_IPicture,(LPVOID*)&pPic);
     
      if (pPic==NULL) return NULL;
      HBITMAP hPic = NULL;
      pPic->get_Handle((UINT*)&hPic);
     
      long nWidth=THUMWIDTH;
      long nHeight=THUMHEIGHT;
     
      long mWid,mHei;
      pPic->get_Height(&mHei);
      pPic->get_Width(&mWid);
     
      HBITMAP hPicRet = (HBITMAP)CopyImage(hPic, IMAGE_BITMAP, nWidth, nHeight , LR_COPYDELETEORG);     
     
     
      HBRUSH hBrushBorder=::CreateSolidBrush(RGB(192, 192, 192));
      HBRUSH hBrushBk=::CreateSolidBrush(RGB(255, 255, 255));
     
     
      RECT rcBorder;
      rcBorder.left=rcBorder.top=0;
      rcBorder.right=THUMWIDTH;
      rcBorder.bottom=THUMHEIGHT;
     
      const float fRatio=(float)THUMHEIGHT/THUMWIDTH;
     
      int XDest, YDest, nDestWidth, nDestHeight;
     
      const float fImgRatio=(float)mHei/mWid;
      if(fImgRatio > fRatio)
      {
            nDestWidth=(THUMHEIGHT/fImgRatio);
            XDest=(THUMWIDTH-nDestWidth)/2;
            YDest=0;
            nDestHeight=THUMHEIGHT;
      }
      else
      {
            XDest=0;
            nDestWidth=THUMWIDTH;
            nDestHeight=(THUMWIDTH*fImgRatio);
            YDest=(THUMHEIGHT-nDestHeight)/2;
      }
     
      CClientDC cdc(this);
      HDC hDC=::CreateCompatibleDC(cdc.m_hDC);
      HBITMAP bm = CreateCompatibleBitmap(cdc.m_hDC, THUMWIDTH, THUMHEIGHT);
      HBITMAP pOldBitmapImage = (HBITMAP)SelectObject(hDC,bm);
      ::FillRect(hDC, &rcBorder, hBrushBk);
      ::FrameRect(hDC, &rcBorder, hBrushBorder);
      HBITMAP hBmReturn= (HBITMAP)::SelectObject(hDC, pOldBitmapImage);
     
      CDC hdcSrc, hdcDst;
     
      hdcSrc.CreateCompatibleDC(NULL);
      hdcDst.CreateCompatibleDC(NULL);
     
      // Load the bitmaps into memory DC
      CBitmap* hbmSrcT = (CBitmap*) hdcSrc.SelectObject(hPicRet);
      CBitmap* hbmDstT = (CBitmap*) hdcDst.SelectObject(hBmReturn);
     
      hdcDst.BitBlt(XDest,YDest,nDestWidth, nDestHeight, &hdcSrc,0,0,SRCCOPY);     
      pOldBitmapImage = (HBITMAP)SelectObject(hdcDst.m_hDC,bm);
     
      DeleteDC(hDC);
      DeleteObject(hBrushBorder);
      DeleteObject(hBrushBk);
     
      return pOldBitmapImage;
}

CString CAddbmpDlg::GetExeAbsolutePath()
{
      char buffer[ MAX_PATH ];
      CString ExePath = "";
      GetModuleFileName( NULL, buffer, MAX_PATH );
      ExePath=CString( buffer );
      ExePath=ExePath.Left(
                        ExePath.ReverseFind( '\\' )>ExePath.ReverseFind( '/' )?
                        ExePath.ReverseFind( '\\' )+ 1:
                        ExePath.ReverseFind( '/' )+1           
                        );
      return ExePath;
}

 

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