如何从硬盘读取BMP文件并在窗口中显示

[coo_wind]

[kinghan]

在MSDN中有一个例程：“DIBLOOK”，可以参考一下。
或者MAILTO: [e-mail]，我给你代码。

[smallbill]

用以下代码就可以了。
CDC MemDC;
RECT wrect;
MemDC.CreateCompatibleDC(pDC);
GetClientRect(&wrect);
HBITMAP bitmap;
int cx=wrect.right-wrect.left;
int cy=wrect.bottom-wrect.top;
bitmap=(HBITMAP)LoadImage(AfxGetInstanceHandle(),"inte3.BMP",IMAGE_BITMAP,cx/10,cy/10,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
ASSERT(bitmap);
HBITMAP OldBitmap;
OldBitmap=(HBITMAP)MemDC.SelectObject(bitmap);
///显示它
// CSize size=bitmap
pDC->BitBlt(0,0,cx,cy,&MemDC,0,0,SRCCOPY);
MemDC.SelectObject(OldBitmap);
其中inte3.bmp为bmp文件名，如不在当前目录下要有路径。pDC为CDC类。

[wistaria]

CBitmap bitmap;
CString m_bmpname;
bitmap.LoadBitmap(m_bmpname);
BITMAP bm;
CDC dc;
bitmap.GetObject(sizeof(BITMAP),&bm);
dc.CreateCompatibleDC(pDC);
dc.SelectObject(&bitmap);
pDC->BitBlt ( x, y, bm.bmWidth, bm.bmHeight, &dc, 0, 0, SRCCOPY );

[dzl]

这是网上一位大虾写的代码，我忘记是谁了。应该感激这原作者。我想
转贴出来，不会违背大虾原意
别忘了在你应用的开始调用AfxOleInit();
bool DisplayImage(CDC *pDC,LPCTSTR szFilePath,int x,int y)
{
bool bRet = true;
IPicture *pPic;
IStream *pStm;

CFileStatus fstatus;
CFile file;
LONG cb;

if (file.Open(szFilePath,CFile::modeRead) &&
file.GetStatus(szFilePath,fstatus) &&
((cb = fstatus.m_size) != -1) )
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);

CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);

if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,
(LPVOID* )&pPic)))
{
OLE_XSIZE_HIMETRIC hmWidth;
OLE_YSIZE_HIMETRIC hmHeight;

pPic->get_Width(&hmWidth);
pPic->get_Height(&hmHeight);

double fX,fY;
fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/((double
)pDC->GetDeviceCaps(HORZSIZE)*100.0);
fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/((doubl
e)pDC->GetDeviceCaps(VERTSIZE)*100.0);

if(FAILED(pPic->Render(*pDC,x,y,(DWORD)fX,(DWORD)fY,0,hmHeight,hm
Width,-hmHeight,NULL)))
{
AfxMessageBox("Failed To Render The picture!");
bRet = false;
}
pPic->Release();
}
else
{
AfxMessageBox("Error Loading Picture From Stream!");
bRet = false;
}
}
}
}
else
{
AfxMessageBox("Can't Open Image File!");
bRet = false;
}
return bRet;
}

[Kerrie]

直接使用LoadImage不行吗？

[向陆松]

我有一个CDIB,从其他地方学到的,要用的话,EMAIL 给我,EMAIL TO YOU. ([e-mail]).