通过文件-打开-加载显示图片!为什么显示是黑的!急解决送分!

BOOL CBMPDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
if (!CDocument::OnOpenDocument(lpszPathName))
return FALSE;
          CFile file;

CFileException er;
    BITMAPFILEHEADER bitfilehead;
BITMAPINFOHEADER bitinfohead;
if(!file.Open(lpszPathName,CFile::modeRead|CFile::typeBinary|CFile::shareDenyWrite,&er))
{
ReportSaveLoadException(lpszPathName,&er,FALSE,AFX_IDP_FAILED_TO_OPEN_DOC);
return FALSE;
}
if (!file.Read(&bitfilehead,sizeof(BITMAPFILEHEADER)))
{
AfxMessageBox("读取到内存失败");
return FALSE;
}

if (bitfilehead.bfType!=((WORD)('M'<<8)|'B'))
    return FALSE;

if(bitfilehead.bfSize!=file.GetLength())
return FALSE;
if(file.Read((LPSTR)&bitinfohead,sizeof(bitinfohead))!=sizeof(bitinfohead))
return FALSE;
int  h=bitinfohead.biHeight;
int  w=bitinfohead.biWidth;
    file.SeekToBegin();
file.Read(&bitfilehead,sizeof(BITMAPFILEHEADER));

UINT bmplen=(UINT)bitfilehead.bfOffBits-sizeof(BITMAPFILEHEADER);

    bitinfo=(LPBITMAPINFO)new BYTE[bmplen];
file.Read((LPVOID)bitinfo,bmplen);

if ((*(LPDWORD)(bitinfo))!=sizeof(BITMAPINFOHEADER))
     return FALSE;
 
DWORD dwbitlen=bitfilehead.bfSize-bitfilehead.bfOffBits;
 lpsrcbit=new BYTE[dwbitlen];
    
file.ReadHuge(lpsrcbit,dwbitlen);
file.Close();
    HBITMAP bitmap=::CreateDIBSection(NULL,(BITMAPINFO*)bitinfo,DIB_RGB_COLORS,&lpsrcbit
,NULL,0);

if (bitmap==NULL)
{AfxMessageBox("CreateDIBsentn") ;return FALSE;
}
m_bitmap=new CBitmap;
    m_bitmap->Attach(bitmap);
    
nWidth=bitinfo->bmiHeader.biWidth;
nHeight=bitinfo->bmiHeader.biHeight;

return TRUE;

}
在头文件中!定义的变量!
CBitmap  *m_bitmap;
LPBITMAPINFO       bitinfo;
LPVOID lpsrcbit;

void CBMPView::OnDraw(CDC* pDC)
{
CBMPDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (  !pDoc->m_bitmap)

{
return;
}
CDC memdc;
memdc.CreateCompatibleDC(pDC);
memdc.SelectObject(pDoc->m_bitmap);
  pDC->BitBlt(0,0,pDoc->nWidth,pDoc->nHeight,&memdc,0,0,SRCCOPY);
/* ::StretchDIBits(pDC->GetSafeHdc(),0,0,pDoc->nWidth,pDoc->nHeight,0,0,pDoc->nWidth,pDoc->nHeight,
pDoc->lpsrcbit,(LPBITMAPINFO)pDoc->bitinfo,DIB_RGB_COLORS,SRCCOPY);
}
有高手帮看看 解决送分马上1

8 个解决方案