MFC使用自定義資源加載PNG

app.h

#define RES_PNG _T("PNG")
#define RES_JPEG _T("JPEG")
#define RES_JIF _T("JIF")

extern BOOL LoadImageFromResource(IN CImage* pImage,
    IN UINT nResID, 
    IN LPCTSTR lpTyp);

app.cpp

BOOL LoadImageFromResource( IN CImage* pImage,
                            IN UINT nResID, 
                            IN LPCTSTR lpTyp)
{
    if ( NULL == pImage ) return FALSE;
    pImage->Destroy();

    HRSRC hRsrc = ::FindResource(AfxGetResourceHandle(), MAKEINTRESOURCE(nResID), lpTyp);
    if ( NULL == hRsrc ) return FALSE;

    HGLOBAL hImgData = ::LoadResource(AfxGetResourceHandle(), hRsrc);
    if ( NULL == hImgData )
    {
        ::FreeResource(hImgData);
        return FALSE;
    }

    LPVOID lpVoid = ::LockResource(hImgData);

    LPSTREAM pStream = NULL;
    DWORD dwSize = ::SizeofResource(AfxGetResourceHandle(), hRsrc);
    HGLOBAL hNew = ::GlobalAlloc(GHND, dwSize);
    LPBYTE lpByte = (LPBYTE)::GlobalLock(hNew);
    ::memcpy(lpByte, lpVoid, dwSize);

    ::GlobalUnlock(hNew);

    HRESULT ht = ::CreateStreamOnHGlobal(hNew, TRUE, &pStream);
    if ( ht != S_OK )
    {
        GlobalFree(hNew);
    }
    else
    {
        pImage->Load(pStream);

        GlobalFree(hNew);
    }
    ::FreeResource(hImgData);

    return TRUE;
}

 

test

BOOL bRet;
    if ( m_imgBackground.IsNull() )
    {
        bRet = LoadImageFromResource(&m_imgBackground, IDB_PNG1,RES_PNG); 
　　　　 ASSERT( bRet ); 
    }