MFC獲取rgb圖像數據后動態顯示及保存圖片的方法

該情況可用於視頻通信中獲取的位圖數據回放顯示或顯示攝像頭捕獲的本地圖像

第一種方法

#include<vfw.h>

加載 vfw32.lib  鏈接庫

//------------------------------設置位圖頭結構信息----------------------------------------------------------------------

// Setup bmpinfo structure yourself
  m_bmpinfo=new BITMAPINFO;    // PBITMAPINFO *m_bmpinfo;
//  m_bmpinfo->bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
  m_bmpinfo->bmiHeader.biSize=sizeof(BITMAPINFO);
  m_bmpinfo->bmiHeader.biWidth=IMG_WIDTH;
  m_bmpinfo->bmiHeader.biHeight=IMG_HEIGHT;
  m_bmpinfo->bmiHeader.biPlanes=1;
  m_bmpinfo->bmiHeader.biBitCount=24;
  m_bmpinfo->bmiHeader.biCompression=0;
  m_bmpinfo->bmiHeader.biSizeImage=0;
  m_bmpinfo->bmiHeader.biXPelsPerMeter=0;
  m_bmpinfo->bmiHeader.biYPelsPerMeter=0;
  m_bmpinfo->bmiHeader.biClrUsed=0;
  m_bmpinfo->bmiHeader.biClrImportant=0;

//-------------在內存中繪制位圖頭信息-----------------------------------------------------------------------------------

// Initialize DIB for drawing...
 hdib=::DrawDibOpen();    // HDRAWDIB hdib;
 if(hdib!=NULL)
 {

  ::DrawDibBegin(hdib,
        m_hdc,
        -1,    // don't stretch
        -1,    // don't stretch
        &m_bmpinfo->bmiHeader,
        IMG_WIDTH,         // width of image
        IMG_HEIGHT,        // height of image
        0
        );
 }

//---------------繪制位圖數據 buf--------------char* buf--------------------------------------------------------------------

 ::DrawDibDraw(hdib,
      m_hdc,
      local_wnd_x,  // dest : left pos
      local_wnd_y,  // dest : top pos
      -1,      // -1 don't zoom x
      -1,      // -1 don't zoom y
      &m_bmpinfo->bmiHeader, // bmp header info
      buf,      // bmp data
      0,      // src :left
      0,      // src :top
      IMG_WIDTH,     // src : width
      IMG_HEIGHT,     // src : height
      DDF_SAME_DRAW    // use prev params....
      );
//------------------------------結束繪制---------------------------------------------------------------------

 // Close graphics....
 if(hdib!=NULL)
 {
 ::DrawDibEnd(hdib);
 ::DrawDibClose(hdib);
 }

 

//***********************************************

第二種方法

 

BITMAPINFO *m_bmphdr;
 DWORD dwBmpHdr = sizeof(BITMAPINFO);
 m_bmphdr = new BITMAPINFO[dwBmpHdr];
 m_bmphdr->bmiHeader.biBitCount = 24;
 m_bmphdr->bmiHeader.biClrImportant = 0;
 m_bmphdr->bmiHeader.biSize = dwBmpHdr;
 m_bmphdr->bmiHeader.biSizeImage = 0;
 m_bmphdr->bmiHeader.biWidth = IMG_WIDTH;
 m_bmphdr->bmiHeader.biHeight = IMG_HEIGHT;
 m_bmphdr->bmiHeader.biXPelsPerMeter = 0;
 m_bmphdr->bmiHeader.biYPelsPerMeter = 0;
 m_bmphdr->bmiHeader.biClrUsed = 0;
 m_bmphdr->bmiHeader.biPlanes = 1;
 m_bmphdr->bmiHeader.biCompression = BI_RGB;

 int nResult = ::StretchDIBits(m_hdc,
  local_wnd_x,
  local_wnd_y,
  IMG_WIDTH,//rc.right - rc.left,
  IMG_HEIGHT,//rc.top,
  0, 0,
  IMG_WIDTH, IMG_HEIGHT,
  buf,
  m_bmphdr,
  DIB_RGB_COLORS,
  SRCCOPY);

保存成bmp圖片文件

// 創建位圖文件
    BOOL SaveBitmap(BYTE *pBuffer, long lBufferLen)
    {
        HANDLE hf = CreateFile(m_szFileName, GENERIC_WRITE,
            FILE_SHARE_READ, NULL, CREATE_ALWAYS, NULL, NULL);
        if (hf == INVALID_HANDLE_VALUE) return 0;
        // 寫文件頭
        BITMAPFILEHEADER fileheader;
        ZeroMemory(&fileheader, sizeof(BITMAPFILEHEADER));
        fileheader.bfType = 'MB';
        fileheader.bfSize = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+lBufferLen;
        fileheader.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
        DWORD dwWritter = 0;
        WriteFile(hf, &fileheader, sizeof(BITMAPFILEHEADER), &dwWritter, NULL);
        // 寫文圖格式
        BITMAPINFOHEADER infoHeader;
        ZeroMemory(&infoHeader, sizeof(BITMAPINFOHEADER));
        infoHeader.biSize = sizeof(BITMAPINFOHEADER);
        infoHeader.biSizeImage = lBufferLen;
        infoHeader.biWidth = lWidth;
        infoHeader.biHeight = lHeight;
        infoHeader.biBitCount = 24;
        WriteFile(hf, &infoHeader, sizeof(BITMAPINFOHEADER), &dwWritter, NULL);
        // 寫位圖數據
        WriteFile(hf, pBuffer, lBufferLen, &dwWritter, NULL);
        CloseHandle(hf);
        MessageBox(NULL, _T("Save bmp file succeed!"), _T("warn"), MB_OK|MB_ICONINFORMATION);
        return 0;
    }