JPG, GIF, BMP, WMF, EMF, ICO 열기(IPicture 사용법)

MFC 에서 JPG나 GIF 등의 이미지를 불러올 수 가 없다. 정확히는 방법을 찾기가 너무 어렵다.

IPicture 로  그림파일 불러오는 방법이 있습니다.

파일 읽기

BOOL CPicture::Load(CString sFilePathName)ImageLoad.zip
{
BOOL bResult = FALSE;
CFile PictureFile;
CFileException e;
int nSize = 0;
 if(m_IPicture != NULL) FreePictureData(); // Important - Avoid Leaks...
 if(PictureFile.Open(sFilePathName, CFile::modeRead | CFile::typeBinary, &e))
{
nSize = PictureFile.GetLength();
BYTE* pBuffer = new BYTE[nSize]; 
if(PictureFile.Read(pBuffer, nSize) > 0)
{
if(LoadPictureData(pBuffer, nSize)) bResult = TRUE;
}

  PictureFile.Close();
delete [] pBuffer;
}
else // Open Failed...
{
TCHAR szCause[255];
e.GetErrorMessage(szCause, 255, NULL);
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, szCause, ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
bResult = FALSE;
}
 m_Weight = nSize;
 if(m_IPicture != NULL)
{
m_IPicture->get_Height(&m_Height);
m_IPicture->get_Width(&m_Width);
//  "Standard" (96 DPI) Device Context
m_Height = MulDiv(m_Height, 96, HIMETRIC_INCH);
m_Width  = MulDiv(m_Width,  96, HIMETRIC_INCH);
}
else
{
m_Height = 0;
m_Width = 0;
bResult = FALSE;
}
 return(bResult);
}

OleLoadPicture를 이용한 Data Laoding

BOOL CPicture::LoadPictureData(BYTE *pBuffer, int nSize)
{
BOOL bResult = FALSE;
 HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, nSize);
 if(hGlobal == NULL)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
 void* pData = GlobalLock(hGlobal);
memcpy(pData, pBuffer, nSize);
GlobalUnlock(hGlobal);
 IStream* pStream = NULL;
 if(CreateStreamOnHGlobal(hGlobal, TRUE, &pStream) == S_OK)
{
HRESULT hr;
if((hr = OleLoadPicture(pStream, nSize, FALSE, IID_IPicture, (LPVOID *)&m_IPicture)) == E_NOINTERFACE)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "IPicture interface is not supported\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
else // S_OK
{
pStream->Release();
pStream = NULL;
bResult = TRUE;
}
}
 FreeResource(hGlobal); // 16Bit Windows Needs This (32Bit - Automatic Release)
 return(bResult);
}

이미지 출력

BOOL CPicture::Show(CDC *pDC, CRect DrawRect)
{
if (pDC == NULL || m_IPicture == NULL) return FALSE; 
long Width  = 0;
long Height = 0;
m_IPicture->get_Width(&Width);
m_IPicture->get_Height(&Height);

    HRESULT hrP = NULL; 
hrP = m_IPicture->Render(pDC->m_hDC,
DrawRect.left,                  // Left
DrawRect.top,                   // Top
DrawRect.right - DrawRect.left, // Right
DrawRect.bottom - DrawRect.top, // Bottom
0,
Height,
Width,
-Height,
&DrawRect);

    if (SUCCEEDED(hrP)) return(TRUE);
 HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}