www.pudn.com > yuzhishuanfa.zip > Graydoc.cpp

// GrayDoc.cpp: implementation of the CGrayDoc class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Image.h" 
#include "GrayDoc.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
IMPLEMENT_DYNCREATE(CGrayDoc,CImageDocA) 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CGrayDoc::CGrayDoc() 
{ 
	m_bGray = TRUE; 
} 
 
CGrayDoc::~CGrayDoc() 
{ 
 
} 
 
BOOL CGrayDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{ 
	if(!CImageDocA::OnOpenDocument(lpszPathName)) 
		return FALSE; 
	if(m_hDIB==NULL) 
		return FALSE; 
	LPSTR lpbi=(LPSTR)::GlobalLock((HGLOBAL)m_hDIB); 
 
	WORD wBitCount;  // DIB bit count 
	DWORD dwCompression; 
	if (IS_WIN30_DIB(lpbi))    //Windows 3.0λͼ 
	{ 
		wBitCount = ((LPBITMAPINFOHEADER)lpbi)->biBitCount; 
		dwCompression=((LPBITMAPINFOHEADER)lpbi)->biCompression; 
	} 
	else                       //OS/2λͼ 
	{ 
		wBitCount = ((LPBITMAPCOREHEADER)lpbi)->bcBitCount; 
		dwCompression=BI_RGB;  //δѹËõ 
	} 
	::GlobalUnlock((HGLOBAL)m_hDIB); 
 
	if(wBitCount != 8 || dwCompression != BI_RGB) 
	{ 
		AfxMessageBox("²»ÊÇ256¼¶»Ò¶Èλͼ"); 
		return FALSE; 
	} 
	else 
	{ 
		m_bGray=TRUE; 
		return TRUE; 
	} 
} 
 
BOOL CGrayDoc::OnSaveDocument(LPCTSTR lpszPathName) 
{ 
	return CImageDocA::OnSaveDocument(lpszPathName);	 
}