openimagefileview.cpp

C:新建文件夹ch4熵编码.rar是JGP文件编码的基础

// openimagefileView.cpp : implementation of the COpenimagefileView class
//

#include "stdafx.h"
#include "openimagefile.h"
#include "openimagefileDoc.h"
#include "openimagefileView.h"
#include "HuffencodeDialog.h"
#include "RunlengthDialog.h"
#include "ACDialog.h"


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

IMPLEMENT_DYNCREATE(COpenimagefileView, CView)

BEGIN_MESSAGE_MAP(COpenimagefileView, CView)
	//{{AFX_MSG_MAP(COpenimagefileView)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	ON_COMMAND(ID_Huff_Encode, OnHuffEncode)
	ON_COMMAND(ID_RunLength_Coding, OnRunLengthCoding)
	ON_COMMAND(ID_Arithmetic_Coding, OnArithmeticCoding)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COpenimagefileView construction/destruction

COpenimagefileView::COpenimagefileView()
{
	// TODO: add construction code here

}

COpenimagefileView::~COpenimagefileView()
{
}

BOOL COpenimagefileView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// COpenimagefileView drawing

void COpenimagefileView::OnDraw(CDC* pDC)
{
	COpenimagefileDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	if(!IsFirstDraw)
	{
	int i,j;
	CDC * dc;
	dc=GetDC();
	for(i=0;i<m_orgHeight;i++)
		for(j=0;j<m_orgWidth;j++)
		  {
	  dc->SetPixel(j,i,RGB(
				m_pImageData[m_orgWidth*(m_orgHeight-i)+j],
				m_pImageData[m_orgWidth*(m_orgHeight-i)+j],
				m_pImageData[m_orgWidth*(m_orgHeight-i)+j]));
			}
	
	}
}

/////////////////////////////////////////////////////////////////////////////
// COpenimagefileView printing

BOOL COpenimagefileView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void COpenimagefileView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void COpenimagefileView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// COpenimagefileView diagnostics

#ifdef _DEBUG
void COpenimagefileView::AssertValid() const
{
	CView::AssertValid();
}

void COpenimagefileView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

COpenimagefileDoc* COpenimagefileView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(COpenimagefileDoc)));
	return (COpenimagefileDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// COpenimagefileView message handlers

void COpenimagefileView::OnFileOpen() 
{
	COpenimagefileDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	CFileDialog dlg(true,NULL,NULL,OFN_OVERWRITEPROMPT,"bmp(*.bmp)|*.bmp||",NULL);
	if(dlg.DoModal()==IDOK)
	{
	
		m_szFileName = dlg.GetFileName(); 
		m_szFilePathName = dlg.GetPathName();
	}
	else 
		return;
	m_pImageData = OpenBMP(m_szFilePathName, &m_orgWidth, &m_orgHeight);
 	IsFirstDraw=FALSE;
	Invalidate(TRUE);	
}


BYTE * COpenimagefileView::OpenBMP(CString fileName, long *width, long *height)
{
	BYTE * pData;
	*width = 0;
	*height = 0;
	if(fileName=="")
		return NULL;
	BITMAPINFO bmpInfo;
	BITMAPFILEHEADER bmpFileHead;
	CFile file;
	if((file.Open(fileName,CFile::modeRead|CFile::shareDenyNone))==NULL)
	{
		AfxMessageBox("Can not open the file");
		return NULL;
	} 
	file.Read(&bmpFileHead,sizeof(BITMAPFILEHEADER));
	file.Read(&bmpInfo,sizeof(BITMAPINFOHEADER));
	*width = bmpInfo.bmiHeader.biWidth;
 	*height = bmpInfo.bmiHeader.biHeight;
	long lFileSize = bmpFileHead.bfSize - bmpFileHead.bfOffBits;
	pData = (BYTE*)new char[lFileSize];
	if(!pData)
		return NULL;
 	file.ReadHuge(pData,lFileSize);
	file.Close();
 	return pData;
}

void COpenimagefileView::OnHuffEncode() 
{
	CHuffencodeDialog dlg;
	dlg.DoModal();	
}

void COpenimagefileView::OnRunLengthCoding() 
{
	CRunlengthDialog dlg;
	dlg.DoModal();
}

void COpenimagefileView::OnArithmeticCoding() 
{
	CACDialog dlg;
	dlg.DoModal();
	
}