fractaldoc.cpp

这是分行用于图像压缩的经典的程序,在正常的情况下可达到7:1左右的压缩比.

// fractalDoc.cpp : implementation of the CFractalDoc class
//

#include "stdafx.h"
#include "fractal.h"

#include "fractalDoc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CFractalDoc

IMPLEMENT_DYNCREATE(CFractalDoc, CDocument)

BEGIN_MESSAGE_MAP(CFractalDoc, CDocument)
	//{{AFX_MSG_MAP(CFractalDoc)
		// 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()

/////////////////////////////////////////////////////////////////////////////
// CFractalDoc construction/destruction

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

}

CFractalDoc::~CFractalDoc()
{
}

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

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

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CFractalDoc serialization

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

/////////////////////////////////////////////////////////////////////////////
// CFractalDoc diagnostics

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

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

/////////////////////////////////////////////////////////////////////////////
// CFractalDoc commands

BOOL CFractalDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	if (!CDocument::OnOpenDocument(lpszPathName))
		return FALSE;
	
	// TODO: Add your specialized creation code here
	CFileException fe;
	if(!file.Open(lpszPathName,CFile::modeRead|CFile::shareDenyWrite,&fe))
	{
		ReportSaveLoadException(lpszPathName,&fe,FALSE,AFX_IDP_FAILED_TO_OPEN_DOC);
		return FALSE;
	}
	//Get the path of file
	bmPath=lpszPathName;
	bitmapName=file.GetFileName();
	DeleteContents();
	BeginWaitCursor();
	file.Read(&bf,sizeof(bf));

	//判断是是否是BMP图象
	if(bf.bfType!=0X4d42)
	{
		AfxMessageBox("非BMP文件!",MB_OK,0);
		return FALSE;
	}
	
	if(file.GetLength()!=bf.bfSize)
	{
		AfxMessageBox("文件头损坏！",MB_OK,0);
		return FALSE;
	}

	file.Read(&bi,sizeof(bi));

	numQuad=0;

	if(bi.biBitCount <24)
	{
		numQuad=1<<bi.biBitCount;
	}

	pbi=(BITMAPINFO* )HeapAlloc(GetProcessHeap(),0,sizeof(BITMAPINFOHEADER)+numQuad*sizeof(RGBQUAD));
	memcpy(pbi,&bi,sizeof(bi));

	quad=(RGBQUAD *)((unsigned char *)pbi+sizeof(BITMAPINFOHEADER));
	if(numQuad!=0)
	{
		file.Read(quad,sizeof(quad)*numQuad);
	}

	int size=sizeof(quad);
	bi.biSizeImage=bf.bfSize-bf.bfOffBits;
	lpBuf=(BYTE *)HeapAlloc(GetProcessHeap(),0,bi.biSizeImage);
	
	//读取图象数据
	file.Read(lpBuf,bi.biSizeImage );
	file.Close();
	flag=1;
	



	
	return TRUE;
}