MFC--位图

如何显示位图？

CDC Dc;
    if(Dc.CreateCompatibleDC(pDC)==FALSE)
    AfxMessageBox("Can't create DC");
    Dc.SelectObject(&m_bitmap);
    pDC->BitBlt(10,10,500,500,&Dc,200,100,SRCCOPY);

-----------------------另一种方式

直接加载外部 bmp, ico, cur

CXXX::OnPaint()
{
CPaintDC dc(this);

CDC  dcMem;
CBitmap  Bitmap ;
HBITMAP hBitmap ;
CRect rect ;

GetClientRect( &rect ) ;
// 加载外部文件
hBitmap = (HBITMAP)::LoadImage(0, _T("D:\\test.bmp"), IMAGE_BITMAP, 0, 0
, LR_LOADFROMFILE);
if ( hBitmap == NULL )
    return ;

Bitmap.Attach( hBitmap );

// 把位图选入内存描述表
dcMem.CreateCompatibleDC( &dc ) ;
dcMem.SelectObject( & Bitmap );

// 显示位图
// dcMem
dc.BitBlt( 0, 0, rect.Width(), rect.Height(), &dcMem, 0, 0, SRCCOPY );

}

显示RGB数据

CPaintDC dc(this); 
ConvertRGB24RToRGB24(g_pImageSrc,g_sRGB,m_nPicWidth,m_nPicHeight);  //倒转
DWORD dwBmpHdr = sizeof(BITMAPINFO);
BITMAPINFO m_bmphdr;
m_bmphdr.bmiHeader.biBitCount = 24;
m_bmphdr.bmiHeader.biClrImportant = 0;
m_bmphdr.bmiHeader.biSize = dwBmpHdr;
m_bmphdr.bmiHeader.biSizeImage = 0;
m_bmphdr.bmiHeader.biWidth = m_nPicWidth;
m_bmphdr.bmiHeader.biHeight = m_nPicHeight;
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(dc.m_hDC,0,0,m_nPicWidth,m_nPicHeight, 0, 0,m_nPicWidth, m_nPicHeight,g_sRGB,
			(BITMAPINFO*)&m_bmphdr,DIB_RGB_COLORS, SRCCOPY);