在MFC中利用SDK显示位图,遇到下面的问题
1、
int CTestView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    if (CScrollView::OnCreate(lpCreateStruct) == -1)
        return -1;
    
    // TODO: Add your specialized creation code here
    
    m_lpbi = (LPBITMAPINFO) malloc(sizeof( LPBITMAPINFO ) + 256 * sizeof( RGBQUAD ));
    memset(m_lpbi, 0, sizeof( LPBITMAPINFO ) + 256 * sizeof( RGBQUAD ));
    m_lpbi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
    m_lpbi->bmiHeader.biCompression = BI_RGB;
/*    for(int i = 0; i < 256; ++i)
    {
        m_lpbi->bmiColors[ i ].rgbBlue = (BYTE) i;
        m_lpbi->bmiColors[ i ].rgbGreen = (BYTE) i;
        m_lpbi->bmiColors[ i ].rgbRed = (BYTE) i;
        m_lpbi->bmiColors[ i ].rgbReserved = 0;
    }
*/    
    return 0;
}
加上注释部分,会导致ToolBar初始化失败,是不是VC 6 本身的BUG?
2、
void CTestView::OnDraw(CDC* pDC)
{
    // TODO: add draw code for native data here
    TRACE("Enter OnDraw\n");
    if(m_img.lpImg && m_lpbi)
    {
        HDC hDC = pDC->GetSafeHdc();
        HDC hdc = ::CreateCompatibleDC( hDC );
        RECT rc;
        GetClientRect( &rc );
/*        m_lpbi->bmiHeader.biBitCount = m_img.unBpp;
        m_lpbi->bmiHeader.biWidth = m_img.lWidth;
        m_lpbi->bmiHeader.biHeight = m_img.lHeight;
        m_lpbi->bmiHeader.biSizeImage = m_img.dwSize;
*/
//        ::SetDIBitsToDevice(hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top,
//            0, 0, 0, m_img.lHeight, (void*)m_img.lpImg, m_lpbi, DIB_PAL_COLORS);
/*        LPLOGPALETTE lpPal = (LPLOGPALETTE) malloc(sizeof(LOGPALETTE) + 256 * sizeof(PALETTEENTRY));
        lpPal->palVersion = 0x300;
        lpPal->palNumEntries = 256;
        for(int i = 0; i < 256; ++i)
        {
            lpPal->palPalEntry[ i ].peBlue = (BYTE) i;
            lpPal->palPalEntry[ i ].peGreen = (BYTE) i;
            lpPal->palPalEntry[ i ].peRed = (BYTE) i;
            lpPal->palPalEntry[ i ].peFlags = 0;
        }
        HPALETTE hPal = ::CreatePalette( lpPal );
        HPALETTE hOldPal = ::SelectPalette(hdc, hPal, TRUE);
        ::RealizePalette( hdc );
*/        ::StretchDIBits(hdc, 0, 0, m_img.lWidth, m_img.lHeight,
            0, 0, m_img.lWidth, m_img.lHeight, m_img.lpImg, m_lpbi, DIB_RGB_COLORS, SRCCOPY);
//        ::SelectPalette(hdc, hOldPal, FALSE);
        ::BitBlt(hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, hdc, 0, 0, SRCCOPY);
        ::DeleteDC( hdc );
//        ::DeleteObject( hPal );
//        free( lpPal );
    }
}
无论怎样,就是不显示,我要显示8位位图,m_img.lpImg是位图元素首地址。



											
	    

	
