view窗口视图保存为BMP图片

来源：互联网发布：淘宝会员名可以修改了编辑：程序博客网时间：2024/06/05 08:26

CDC* pDC = GetWindowDC();
    CBitmap bitmap;
    CDC memDC ;
    CRect rect;
    GetWindowRect(rect);
    memDC.CreateCompatibleDC(pDC);

    bitmap.CreateCompatibleBitmap(pDC,rect.Width(),rect.Height());
    memDC.SelectObject(&bitmap);
    memDC.BitBlt(0,0,rect.Width(),rect.Height(),pDC,0,0,SRCCOPY);

    CFileDialog fDlg(FALSE,_T("bmp"),NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,_T("位图文件|*.bmp"),this);
    if (fDlg.DoModal()==IDOK)
    {

        CString bmpfile = fDlg.GetPathName();

        CFile file(bmpfile,CFile::modeCreate|CFile::modeWrite);

        BITMAP bInfo;
        bitmap.GetBitmap(&bInfo);

        //计算调色板大小
        int panelsize = 0;
        if (bInfo.bmBitsPixel<24) //非真彩色
        {
            panelsize = pow((double)2,bInfo.bmBitsPixel)*sizeof(RGBQUAD);
        }

        //定义位图信息
        BITMAPINFO* bMapInfo = (BITMAPINFO*)LocalAlloc(LPTR,sizeof(BITMAPINFO)+panelsize);
        bMapInfo->bmiHeader.biBitCount = bInfo.bmBitsPixel;
        bMapInfo->bmiHeader.biClrImportant = 0;
        bMapInfo->bmiHeader.biCompression = 0;
        bMapInfo->bmiHeader.biHeight = bInfo.bmHeight;
        bMapInfo->bmiHeader.biPlanes = bInfo.bmPlanes;
        bMapInfo->bmiHeader.biSize = sizeof(BITMAPINFO);
        bMapInfo->bmiHeader.biSizeImage = bInfo.bmHeight*bInfo.bmWidthBytes;
        bMapInfo->bmiHeader.biWidth = bInfo.bmWidth;
        bMapInfo->bmiHeader.biXPelsPerMeter = 0;
        bMapInfo->bmiHeader.biYPelsPerMeter = 0;

        //获取位图的实际数据
        char* pData = new char[bMapInfo->bmiHeader.biSizeImage];
        int len = GetDIBits(pDC->m_hDC,bitmap,0,bInfo.bmHeight,pData,bMapInfo,DIB_RGB_COLORS);

        BITMAPFILEHEADER bFileHeader;
        bFileHeader.bfType = 0x4D42;
        bFileHeader.bfReserved1 = 0;
        bFileHeader.bfReserved2 = 0;
        bFileHeader.bfSize = sizeof(BITMAPFILEHEADER);
        bFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+panelsize;

        //向文件中写入位图数据
        file.Write(&bFileHeader,sizeof(BITMAPFILEHEADER));
        file.Write(&bMapInfo->bmiHeader,sizeof(BITMAPINFOHEADER));
        file.Write(pData,bMapInfo->bmiHeader.biSizeImage+panelsize);
        file.Close();
        delete pData;
        LocalFree(bMapInfo);
    }
    bitmap.DeleteObject();
    memDC.DeleteDC();

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