readgpegdoc.cpp

该源码可实现jepg图片的读取功能

// ReadGpegDoc.cpp : implementation of the CReadGpegDoc class
//

#include "stdafx.h"
#include "ReadGpeg.h"

#include "ReadGpegDoc.h"
//#include"FormatJpeg.h"


extern "C" { #include "jpeglib.h" }

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CReadGpegDoc

IMPLEMENT_DYNCREATE(CReadGpegDoc, CDocument)

BEGIN_MESSAGE_MAP(CReadGpegDoc, CDocument)
	//{{AFX_MSG_MAP(CReadGpegDoc)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CReadGpegDoc construction/destruction

CReadGpegDoc::CReadGpegDoc()
{
	// TODO: add one-time construction code here

}

CReadGpegDoc::~CReadGpegDoc()
{
}

BOOL CReadGpegDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CReadGpegDoc serialization

void CReadGpegDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
	}
	else
	{
		// TODO: add loading code here
	}
}

/////////////////////////////////////////////////////////////////////////////
// CReadGpegDoc diagnostics

#ifdef _DEBUG
void CReadGpegDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CReadGpegDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CReadGpegDoc commands

BOOL CReadGpegDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	if (!CDocument::OnOpenDocument(lpszPathName))
		return FALSE;
	
	// TODO: Add your specialized creation code here
		UINT uWidth, uHeight, uWidthDW;
		BYTE *lpTmpBuffer = ReadJPEGFile(lpstrFileName, &uWidth, &uHeight);
	
		

		
	

	

		return TRUE;
	
	
}