wangview.cpp

图像受到裁剪攻击时的一些算法 只要输入图像和想要裁剪的位置 就可以得到想要的结果

// wangView.cpp : implementation of the CWangView class
//

#include "stdafx.h"
#include "wang.h"
#include"cutdown.h"
#include "wangDoc.h"
#include "wangView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CWangView

IMPLEMENT_DYNCREATE(CWangView, CView)

BEGIN_MESSAGE_MAP(CWangView, CView)
	//{{AFX_MSG_MAP(CWangView)
	ON_COMMAND(ID_FILE_cut, OnFILEcut)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CWangView construction/destruction

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

}

CWangView::~CWangView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CWangView drawing

void CWangView::OnDraw(CDC* pDC)
{
	CWangDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
     xl=100;
	 xr=200;
	 yb=100;
	 yt=200;
	
	pDC->MoveTo(xl,yb);
	pDC->LineTo(xr,yb);
	pDC->MoveTo(xl,yb);
	pDC->LineTo(xl,yt);
	pDC->MoveTo(xr,yb);
	pDC->LineTo(xr,yt);
	pDC->MoveTo(xl,yt);
	pDC->LineTo(xr,yt);
   
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CWangView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CWangView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CWangView message handlers

int CWangView::makecode( double x,double y)
{

	int c=0;
	if(x<xl)c=1;
	else if(x>xr)c=2;
	if(y<yb)c=c+4;
	else if(y>yt)c=c+8;
	return c;
}
void CWangView::OnFILEcut() 
{
	// TODO: Add your command handler code here
    cutdown d;
	CClientDC  pDC(this);
	CPen pen,*OldPen,pen2;
    double x0,x2,y0,y2;
	pen.CreatePen(PS_SOLID,2,RGB(255,0,0));
	OldPen=pDC.SelectObject(&pen);  
	double m1,m2,m3,m4,n1,n2,n3,n4;
    
	
		
	if(d.DoModal()==IDOK)
	{
		x0=d.m_x0;  y0=d.m_y0;  x2=d.m_x2;  y2=d.m_y2;
		int c,c1,c2;
		double x,y;
		c1=makecode(x0,y0);
		c2=makecode(x2,y2);
	  	while(c1!=0||c2!=0)
		{
			if((c1&c2)==1)return;
			c=c1;if(c==0)c=c2;
			if(c&1==1){y=y0+(y2-y0)*(xl-x0)/(x2-x0);x=xl;}
			else if(c&2){y=y0+(y2-y0)*(xr-x0)/(x2-x0);x=xr;}
			else if(c&4){x=x0+(x2-x0)*(yb-y0)/(y2-y0);y=yb;}
			else if(c&8){x=x0+(x2-x0)*(yt-y0)/(y2-y0);y=yt;}
			if(c==c1)
			{x0=((int)x);y0=((int)y);c1=makecode(x,y);}
			else
			{x2=((int)x);y2=((int)y);c2=makecode(x,y);}
		
		}
        m1=d.m_x0;  n1=d.m_y0;
		m2=x0;n2=y0;
		m3=x2;n3=y2;
		m4=d.m_x2; n4=d.m_y2;		

	pDC.MoveTo ((int)m1,(int)n1);
	pDC.LineTo ((int)m2,(int)n2);
	pDC.MoveTo ((int)m3,(int)n3);
	pDC.LineTo ((int)m4,(int)n4);
	
/*	pDC.MoveTo ((int)x0,(int)y0);
	pDC.LineTo ((int)x2,(int)y2);
	*/
	}
	pDC.SelectObject(OldPen); 
}
/*(1) 成员函数MoveTo:将当前的绘图位置移到point 指定的坐标处 
       CPoint   MoveTo(int x,int y);
       CPoint   MoveTo(POINT point);
  (2) 成员函数LineTo
 在当前的绘图位置上与一个新坐标点之间画一条直线，这个新的坐标点将变成当前位置。
        BOOL   LineTo (int x,int y);
        BOOL   LineTo (POINT);
*/