C / C++ / MFC

kapardhi wrote:

PurgeComm clears the buffer of the device's driver, i want to clear the buffer of the Serial COM port of my computer !!

BOOL SaveBitmapFile(HDC p_hDC, LPCTSTR p_pchFileName)
{
    HBITMAP hBmp = (HBITMAP)GetCurrentObject( p_hDC, OBJ_BITMAP );

    BITMAPINFO stBmpInfo;
    stBmpInfo.bmiHeader.biSize = sizeof( stBmpInfo.bmiHeader );
    stBmpInfo.bmiHeader.biBitCount = 0;
    GetDIBits( p_hDC, hBmp, 0, 0, NULL, &stBmpInfo, DIB_RGB_COLORS );

    ULONG iBmpInfoSize;

    switch( stBmpInfo.bmiHeader.biBitCount )
    {
        case 24:
            iBmpInfoSize = sizeof(BITMAPINFOHEADER);
        break;

        case 16:
        case 32:
            iBmpInfoSize = sizeof(BITMAPINFOHEADER)+sizeof(DWORD)*3;
        break;

        default:
            iBmpInfoSize = sizeof(BITMAPINFOHEADER) +
                           sizeof(RGBQUAD) * ( 1 << stBmpInfo.bmiHeader.biBitCount );
        break;
    }

    PBITMAPINFO pstBmpInfo;
    if( iBmpInfoSize != sizeof(BITMAPINFOHEADER) )
    {
        pstBmpInfo = (PBITMAPINFO)GlobalAlloc( GMEM_FIXED | GMEM_ZEROINIT, iBmpInfoSize );
        PBYTE pbtBmpInfoDest = (PBYTE)pstBmpInfo;
        PBYTE pbtBmpInfoSrc = (PBYTE)&stBmpInfo;
        ULONG iSizeTmp = sizeof( BITMAPINFOHEADER );

        while( iSizeTmp-- )
        {
            *( ( pbtBmpInfoDest )++ ) = *( ( pbtBmpInfoSrc )++ );
        }
    }

    HANDLE hFile = CreateFile( p_pchFileName, GENERIC_WRITE, 0,
                               NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_ARCHIVE,
                               NULL );

    BITMAPFILEHEADER stBmpFileHder;
    stBmpFileHder.bfType = 0x4D42; // 'BM'
    stBmpFileHder.bfSize = sizeof(BITMAPFILEHEADER)
                         + sizeof(BITMAPINFOHEADER)
                         + iBmpInfoSize
                         + pstBmpInfo->bmiHeader.biSizeImage;

    stBmpFileHder.bfReserved1 = 0;
    stBmpFileHder.bfReserved2 = 0;
    stBmpFileHder.bfOffBits = sizeof(BITMAPFILEHEADER) + iBmpInfoSize;

    DWORD dRet;

    //// WRITING ////
    WriteFile( hFile, (LPCVOID)&stBmpFileHder , sizeof(BITMAPFILEHEADER), &dRet, NULL );

    PBYTE pBits = (PBYTE)GlobalAlloc( GMEM_FIXED | GMEM_ZEROINIT, stBmpInfo.bmiHeader.biSizeImage );

    HBITMAP hBmpOld;
    HBITMAP hTmpBmp = CreateCompatibleBitmap( p_hDC,
                                              pstBmpInfo->bmiHeader.biWidth,
                                              pstBmpInfo->bmiHeader.biHeight );

    hBmpOld = (HBITMAP)SelectObject( p_hDC, hTmpBmp );

    GetDIBits( p_hDC, hBmp, 0, pstBmpInfo->bmiHeader.biHeight,
               (LPSTR)pBits, pstBmpInfo, DIB_RGB_COLORS );

    //// WRITING ////
    WriteFile( hFile, (LPCVOID)pstBmpInfo, iBmpInfoSize, &dRet, NULL );

    WriteFile( hFile, (LPCVOID)pBits, pstBmpInfo->bmiHeader.biSizeImage, &dRet, NULL );

    SelectObject( p_hDC, hBmpOld );
    DeleteObject( hTmpBmp );
    CloseHandle( hFile );
    GlobalFree( pstBmpInfo );
    GlobalFree( pBits );
    return TRUE;
}

ThisIsMeRon wrote:

Write the DDB to an image stream in some Mac-recognizable format

Mark Salsbery
Microsoft MVP - Visual C++

HBITMAP DIBBitmap = CopyImage(DDBBitmap, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION)